the evolving roles of nonwovens in technical textiles.

The textile industry is one of the biggest consumers.
Supporting industries that have a significant impact on the world economy.
In terms of improving textile performance, the application progress of non-woven fabric technology provides great economic potential for the growth of the industry.
In recent years, it has been proved that non-woven fabric technology can be used to enhance the technical properties of textiles, such as durability, air permeability, water resistance, fire resistance, antibacterial properties, absorption and barrier resistance, and so on.
Technical textiles account for about 40% of the entire textile industry by weight.
In 2007, the global market for technical textiles was estimated at approximately 21 million tons, valued at $115 billion.
It will increase to 24 million tons by 2010, worth $127 billion.
In technical textiles, about 40% is non-woven according to tonnage.
The industry\'s future growth is driven mainly by emerging markets such as Asian countries (China and India)
Eastern European countries and South America.
Non-woven fabric sheet, net, or strip made of directional or random directional fibers bonded by friction and/or adhesion, excluding woven, knitted paper and products, tufted, stitch
Adhesive Bonding yarn or filament or wet felt
Milling can be carried out regardless of the additional needs.
Fiber can be natural or human. made origin.
They may be short fibers or continuous filaments, or they may be formed in situ.
Non-woven fabrics for technical textiles are mainly synthetic polymers-
Based on the inherent strength and versatility of this fiber, this trend is expected to continue in the future.
The consumption of raw materials indicates that 50% of the consumption is olefin and polyester, followed by glass and jute, 15% and 14% respectively.
Cotton and viscose fibers accounted for 7% and 6% respectively.
Specialized fibers and nets, such as aramids and carbon fiber, account for the rest of the entire non-woven fabric used in technical textile applications.
There is an increasing interest in non-woven fabrics that combine the advantages of different textile structures, including knitted fabrics, composites and films.
Worldwide, the non-woven industry continues to expand 8.
Tonnage is 5% tons per year.
The growth of the world is partly due to several industrialized economies and their presence in non-woven materials and key markets such as hygiene, Consumer Wipes, liquid and gas filtration, furniture and bedding, car construction roof and geotextile.
As new technologies improve the properties of non-woven fabrics, in many applications, including industrial wet wipes, clothing and clothing, as well as special functional materials, the increase in market penetration will lead to further growth.
However, price pressures in the consumer market will limit growth, and in the consumer market, conversion companies will try to reduce costs by reducing the amount of non-woven fabrics in end-user products.
Non-woven fabrics as technical textiles have many advantages.
Nonwovens tear resistance, soil, chemicals, puncture, UV exposure, mildew, decay, freezing/Thawing conditions, excellent strength, breathability and barrier properties, attractive fiber and structural appearance of various surface tension, with relatively low cost, are ideal for technical application.
* Wear resistance: non-woven fabrics are five times more durable than other traditional fabrics.
* Sound insulation: Polyester non-woven fabric reaches the same or higher absorption value as comparable standard materials.
Some non-woven fabrics for sound insulation are also 50% lighter than similar materials, bearing temperatures of up to 180 [degrees]C or higher.
* Barrier: a non-woven mesh can filter almost all particles or aerosol or microorganisms larger than two microns, and can be manufactured to filter smaller particles into nano-scale in air or liquid.
Non-woven mesh can be made with high-load activated carbon to remove hydrocarbon vapor, gas and other intolerable odors in the air. * Cost-
Effective: The quality and flexibility of non-woven fabric make the material more cost-effective
Effective than similar materials.
In addition, since they are usually lighter than woven materials, they help manufacturers to improve fuel efficiency of vehicles to meet federal requirements and the needs of consumers.
* Durable: non-woven fabrics can be designed to be stronger than traditional textiles relative to their weight.
They can also be designed to be very wear-resistant-and heat-resistant.
* Easy to customize: non-woven mesh is capable of forming and contouring to fit most interiors and some complex surfaces.
Manufacturers are also able to manipulate the thickness, stiffness and fiber composition of the web according to the most demanding requirements.
* Fire Resistance: dedicated non-woven fabrics are comparable to woven or woven materials in this regard.
* Strength and weight: non-woven fabrics can be designed to be much stronger than woven or woven materials of the same weight.
* Attractive integrity: non-woven fabrics can be used throughout the vehicle.
The color and texture are very good.
When pigments are added in the process of fiber formation, such as textile bonding, they are highly resistant to fading and frictionoff.
In addition, these materials provide a more uniform stretch than the woven material on the length and width of the carpet, resulting in a more uniform appearance.
* Thermal protection: mechanical bonded fiberglass can be used at continuous operating temperatures up to 1000 [degrees]
F. Basalt pads can be used at continuous working temperatures up to 1500 [degrees]F;
Silicone materials can be used as of 2000 [degrees]F.
The application of non-woven fabrics in technical textiles is usually, and the application of non-woven fabrics in technical applications includes: 1.
Agricultural Technology: Crop cover, seed blanket, weeding fabric, greenhouse shade, root bag, biodegradable flowerpot, capillary pad cover, protection and collection, fishing and binding. 2.
Construction Technology: roof and tile floors, insulation and sound insulation, House packaging, gypsum board, pipe packaging, concrete molding, foundation and ground stability, vertical drainage, protection and display, textile building, building components, enhance materials and high quality wallpaper. \' 3.
Clothing Technology: shoe parts, insulation and construction, sewing products, lining cloth, clean room clothing and application of shoes and leather products. 4.
Geotech: asphalt paving, soil stabilization, drainage, settlement and erosion control, pond liner, dipping Foundation, drainage passage liner, separation, reinforcement, filtration, offshore land reclamation, roadside, railway river and canal banks and the reservoir. 5.
Household goods: carpet accessories, furniture accessories, wipes (
Baby wipes for personal and household use)
Industrial Wipes (
Food Service, general industrial supplies, medical wipes)
Interior design, curtains, covers, tickings and composites. 6.
Industry Tech: Electrical components (
Cable insulation, floppy pad, insulating tape and micro filter)
Filter separation (
Air, liquid and gas)
, Satellite antenna, garment surface treatment tissue/veil, conveyor belt, reinforced plastic, PVC substrate, Flame Barrier, noise absorber, battery separator (
Alkaline, acidic and fuel cells)
Anti-slip mat, lifting pull. 7.
Medtech: curtains and gowns, sterile packaging, cotton swab (
Operating room ward use)
And dressing, cleaning, work clothes, wounds-
Care, protective clothing, bedding, sheets and masks. 8.
Boots tech: boot liner, wrap shelf, heat shield, shelf trim, molded Hood liner, boot floor cover, fuel/oil filter, headline, rear wrap rack engine intake and exhaust filter, silencers, insulation, car cover, padding, car pad, adhesive tape, floor-backing of tufted carpet, seat cover, door trim and insulation
Covering, protection and composites. 9.
Packaging Technology: bulk packaging, waste and disposable supplies, spacers, strapping and absorbent food mats with predefined 3D structures. 10.
Protection: chemical and biological protection, particle protection, flame retardant, cutting resistance, shield and gown worn in emergency response, chemical treatment, hazardous waste control, cleaning and filtration. 11.
Sporttech: luggage accessories, sports equipment, sportswear, wipes, covers, disposable items and camping equipment. 12.
Oekotech: environmental protection, filtration of waste gas and wastewater, collection of dust, leakage of oil, removal of gas and odor.
In this report, non-woven fabrics in technical applications are classified as disposable and durable non-woven fabrics.
Disposable non-woven fabrics include non-woven fabrics for hygiene, medical care, consumer wipes and industrial wipes.
Durable non-woven fabric includes for clothing, lining cloth, shoes and leather products, furniture and bedding, floor coverings, liquid filtration, air and gas filtration, construction and roofing, geotextile, automobiles, agriculture and electronics.
Disposable non-woven fabrics are those with short disposable service life, including sanitary, medical, consumer wipes, Industrial wipes and others.
Hygienic non-woven fabrics include baby diapers, training pants, adult diapers and women\'s care products (
External and internal).
Medical non-woven fabrics include curtains and gowns, sterile packaging, cotton swabs (
Or use and Ward use)And dressing.
Consumer Wipes include baby wipes, personal care wipes, and household cleaning wipes.
Industrial wipes include wet wipes for food service, General wet wipes for industrial use, wet wipes for industrial use and medical wipes.
Other disposable non-woven fabrics include fabric softener substrate, absorbent, sterile and non-
Sterile packaging materials for desktop items (
Napkins and tablecloths)
Soak pads for food packaging.
Hygienic disposable non-woven fabrics include baby diapers, training pants and adult diapers (
Incontinence in adults
Women care products (
External and internal).
External female care products include sanitary napkins and pads.
Internal female care products refer to sanitary cotton strips.
Non-woven sanitary products include overalls and inflatable cores.
Work clothes are a common type of non-woven material used to describe the construction of sanitary products, including topsheet, barrier leg cuffs, back plates, elastic panels, fastening strips and landing strips, obtain/distribute the core material of the layer and the inflatable pulp absorption.
Medical non-woven fabrics include curtains and gowns, sterile packaging, cotton swabs (
Or use and Ward use)and dressings.
Among them, the surgical gown, curtains, hanging cloth and other accessories accounted for 2 out of nearly 3.
Surgical curtains made of non-woven materials occupy about 95% of the entire curtain market.
It is estimated that operating clothes account for 90% of the dress market.
Consumer Wipes include baby wipes, personal care wipes, and household cleaning wipes.
Special purpose wet wipes are becoming more and more popular, resulting in a decline in the number of baby wipes, from adult hygiene to cleaning leather car seats, baby wipes have also been widely used.
Personal care wipes include anything that touches the human skin, including antibacterial wipes, acne medication pads, alcohol preparation pads, deodorant and refreshing wipes, eye pads, female sanitary wipes
Wet wipes, hemorrhoids wipes, incontinence wipes, cosmetics
Up makeup remover wipes, wipes and dry wipes, wound wipes, etc.
Household cleaning wipes are wipes or dry wipes for surface cleaning, including car care wipes, computer wipes, disinfectant wipes, dry cleaning wipes, furniture polishing wipes, glass cleaning except paint wipes, pet wipes (
Dog bath wipe and dandruff
Cat wipe)
, Silver and brass cleaner, dishwashing wipes, defacing wipes and tough task defacing wipes.
Industrial Wipes are disposable non-woven products for various applications in industry and institutions, including food service wipes, industrial General wipes, industrial special wipes and medical wipes.
Wet wipes are mainly used in restaurants, including fast food restaurants in the restaurant preparation area to the dining area, as well as service counters and tables.
Industrial general purpose wet wipes include general purpose and surface cleaning, skin cleaning, arduous tasks, scrubbing, dust removal and static electricity, control environment for key tasks, polishing and glass cleaning.
They are also used for cleaning, maintenance and repair operations in industrial plant workshops, cleaning commercial cleaning, automotive military aerospace, landscaping of geotextile and anti-overflow absorption pads.
The main end markets for industrial dedicated wipers are: clean rooms for painting, photography and printing industries, as well as the automotive and aerospace industries, also known as transportation or surface preparation.
The common feature of these professional markets is that wipes must be
Use to prevent small particles from polluting products.
Medical wipes include hard-surface antibacterial wipes, bath wipes and incontinence wipes designed for hospitals and healthcare facilities.
Durable non-woven fabrics are those that are used for a long time
Life applications or multiple uses, including clothing, lining cloth, shoes and leather products, coating and lamination, furniture and bedding, floor covering, liquid filtration, air and gas filtration, building and roof geotex, automotive, agricultural and electronic products.
Other durable materials include garment insulation, demoulding material, electrical insulation, paper felt, heat insulation plate, graffiti, wall covering, polishing and grinding material, scrub pad (needlepunched)
, Car and boat tarp, bag and can separator.
The largest market segment in the non-woven clothing market is protective clothing used in a healthy and safe environment.
This includes dresses worn in emergency response, chemical treatment, hazardous waste control and agriculture.
Cleaning clothing is another important part to protect the wearer from chemical or biological hazards.
Due to its superior performance and low cost, the non-woven lining material of the lining cloth has greatly replaced the traditional lining textile in the clothing application.
At present, more than 70% of the lining materials are non-woven fabrics.
The main applications include men\'s custom suits (
Lapels, jacket front, cuffs, collar, pocket stay, chest piece and stable label)
And women\'s clothing (
Tops, skirts, dresses, wallets and coats).
Shoes and leather products are used for most non-woven fabrics of shoes and leather products for \"Brown Shoes\" applications.
Several non-woven technologies have been used in this field.
Hot bonded non-woven fabric dominates, accounting for almost two
Thirty materials are consumed.
Coatings and laminated substrates are usually made from needle-punched non-woven fabrics used to produce artificial leather.
Other important non-woven fabrics that supply this market are the spinning method and the wet shop method.
In order to increase the strength and durability, it has had a significant impact on the development of non-woven composite structures.
These materials and other applications of antimicrobial therapy are becoming routine.
Furniture and bedding non-woven fabrics for furniture and bedding include upholstered furniture, bedding and other furniture applications.
The biggest market segment is non-woven fabrics for beds, accounting for half of the total consumption.
Non-woven fabrics of upholstered furniture follow this principle, and an estimated 37% of all non-woven fabrics consumed using this segment.
The remaining non-woven fabric volumes for furniture and bedding are used for other furniture applications such as mattress pads, bedspread quilt backs, dust pleat platforms, various window treatments and room partitions.
Non-woven areas in the upholstered furniture section include spring insulation pads, Foundation dust cover, pull strips, pillow or cushion packaging and skirt lining.
In bedding, the most used areas are mattress quilt backing, cuffs, spring insulator, spring packaging, box spring dust cover and mattress drops on some lower-priced bedding
Floor covering consists of six main parts, they are wide loom and patterned carpet backing, back lining of car carpet, back lining of modular carpet, walk
Such as needle-punched carpet backing, film and non-woven floor protective laminate, etc.
These floor coverings do not all grow at the same speed.
Automobile carpet backing is the largest non-woven floor market in China.
Most of this part is the backing of the main carpet.
The tufted carpet is used as a backing for locking tarfs and provides an additional body for the secondary backing.
Liquid filtration is a fast filtration.
Non-woven fabric market including water filtration is growing (
Water and Wastewater)
Food and beverage filtration, pharmaceutical and electronic processes, blood filtration, tea bags and coffee and juice filters, edible oil filters and oil/fuel filters for automobiles.
As the membrane carrier of micro-filtration, non-woven fabric has been successfully applied in industry (MF)
, UF and reverse osmosis (RO)filtration.
The market for air and gas filtration includes household filters, industrial filters, and automotive filters.
Household filters are filters on the market for HVAC, cooking filters, vacuum cleaners and a variety of portable filters.
General industrial filters, HVAC/HEPA/ULPA filters, power station filters, incinerators, spray booth and dust removal of many industrial processes, need to be cleaned if air is contaminated, or need to be ultra-clean for production.
Car filters include engine air filters (
Intake and exhaust)
Cabin air filter and fuel/oil filter.
Non-woven media are economical and perform well in many filtration applications.
They will continue to increase their share in many end applications.
Non-woven fabrics for buildings and roofs are mainly used for house packaging and roofing.
The House packaging market uses a variety of materials, but non-woven fabrics occupy a considerable share of the whole business.
These materials are barriers to making the building more closed, thus reducing the cost of heating and air conditioning.
The housing package is designed as a breathable film to reduce air leakage and protect the structure from elements.
However, at the same time, the barrier material is breathable, so that the internal moisture can gradually pass through the barrier to prevent the building.
Moisture rises inside the walls of the structure.
Fabric functions include separation, enhancement, filtration, drainage and/or as a moisture barrier (
When dipping)
Used for roads and railways, reclamation of offshore land, roadside, rail side, river and canal banks, and reservoirs.
Nonwovens tear resistance, soil chemicals, puncture, UV exposure, mildew, rot, freezing/Thawing conditions, etc.
Make it an ideal choice for applications.
The main uses of non-woven fabrics in the geotextile market include asphalt coverings, separation of different materials, reinforcement of lining systems, weak soil and other materials, and drainage/filtration systems.
More than 40 car parts of the car are made of non-woven fabric, from the Hood trunk lining to the insulation, from the carpet to the roof lining, from the engine intake to the exhaust, including the trunk lining, the parcel shelf, the insulation cover, shelf decoration, molded liner, boots floor covering, oil filter, hood, rear parcel shelf, airbag, cabin air filter, silencer pad, insulation, car cover, liner, car mat, tape, tufted carpet backing, seat cover door trim and insulation, floor covering, protection and composites.
Non-woven fabrics compete with fabric, paper, foam or fiberglass materials used in automobile manufacturing.
However, the ongoing trend of cost reduction and weight reduction suggests that non-woven fabrics may take a share from these materials.
The market for non-woven fabrics for agriculture includes crop protection, weed control, and greenhouse shade.
In agriculture, non-woven materials are used to inhibit weed growth and prevent elements (
Frost, wind, rain, rain)
Anti-harmful insects, moisturizing, anti-erosion, seed germination, crop cover and shading cloth.
The advantage of non-woven materials is that they are porous while providing protection.
In addition, non-woven fabrics can resist mildew, decay and destructive microorganisms.
The non-woven electronic market is mainly composed of battery separator and floppy pad.
Other smaller applications include cable winding, insulation, and board materials.
The market of battery separator is the biggest market segment, and the change of battery technology directly affects the market.
Most of them are various wet-spread glass for lead-acid batteries.
In the smaller rechargeable battery market, nickel-metal hydrogen batteries are growing faster than nickel-cadmium batteries.
These two types of batteries only use non-woven fabrics for separator materials, so there is a positive connection between the two growth rates.
The potential use of fuel cells in cars and elsewhere provides another promising market for non-woven fabrics as battery separators.
Development of non-woven fabric process
The forming process of non-woven fabric includes dry method, air flow method, wet method and water Thorn method.
Including hot bonding, needle-
Punch water Thorn (hydroentangled)
Chemical Bonding (latex bonding)
Material is the leading network formation process at present.
Dry shop mainly refers to the net that is generated by hot bonding, mechanical bonding, chemical bonding and water Thorn bonding.
Dry laying also includes parallel laying, random laying, card laying, Cross laying and aerodynamics (
Airflow of long fiber cardwebs).
Combing is a process of forming a network, separating small clusters into single fibers, starting the parallel process, and conveying fibers in the form of a network.
Made from a variety of fibers, including artificial silk and polyester with a fiber length of 1. 2 to 20 cm. Airlaying (airforming)
Is a method of mixing fiber with air to form even air
The fiber mixture is then deposited on the moving air
Permeable belts or wires.
Therefore, airlaid can be bonded using latex (LBAL)
, Hot bonding airlay (TBAL)
The combination of the two (MBAL)
Or high pressure adhesive gas shop (HBAL)
Such as water entanglement. The so-
The process known as AirPods is the process of winding the airlaid network. Dan-
Network and Orry Newman AG (
Former M & J, Fibertech)
Two unprecedented manufacturers of airlines.
Professional non-woven fabric manufacturers including Aike Technology, concerts and other industries, Georgia
Pacific non-woven, Rexcell (Duni)
, McAirlaid, Prince, FiberWeb (
Original BBA, added a second line in Tianjin, China in 2007)
And recently, Danish airlines.
The growth of this technology continues to be driven by the expanded use of inflatable pulp materials in disposable sanitary non-woven fabrics.
Air laying technology is often different from other drying nets in the use of very short fibers (mainly pulp.
Therefore, most of the products obtained by this method have high absorption.
They are cheap and biodegradable.
The pulp and Pulp/synthetic mixture are the main raw fibers for air-tight non-woven fabrics.
Due to the application of Airlaid pulp in wet wipes and water absorption applications, it has and will continue to expand.
The baby wipes market has driven the growth of air pulp to a large extent.
The water absorption hygiene industry uses the gas paving slurry as the water absorption core material, which once again greatly improves the volume of the gas paving slurry.
Despite the relative balance of capacity and demand in Europe, North America is still in a situation of overcapacity.
The main terminal market for Airlaid pulp materials includes wet wipes (
Individual, family and industrial Baby)
Desktop items, absorbent core materials (
Napkins, tablecloths)
And medical dressing.
Emerging product applications include
Buffer material for packaging, filter media, new composite wiping material and food soak pad.
During the wet laying process, by using the wet-
Non-woven system formed.
The fibers are dispersed in the water at a very high dilution and then deposited on the screen to separate the water from the fibers.
As a result, wet winding can form a uniform, almost completely iso-gay plate structureForm a system. Wet-
The forming system is fast and efficient compared with other web forming technologies.
A variety of adhesive technology can be applied to wet paving.
Wet-spread non-woven fabrics are used in a variety of different application areas, especially in disposable non-woven fabrics for health markets, filtration applications and medical/surgical use, including tea bag media, filter material, medical barrier fabric, special wet wipes, battery separator, coated/Laminated Substrates and several other smaller markets.
The world\'s largest producer of wet-spread non-woven fabrics is Ahlstrom, followed by Hollingsworth & Vose.
They have factories in Europe and North America.
Textile-bonded non-woven fabrics, including textile bonding, fusion spraying, flash spraying and electrostatic spinning, show potential growth and will be at the forefront in the next few years
Large-scale production.
The spindle forming is a net forming process that melts, squeezes and places the polymer into a net.
Usually, the broken net is its own.
Due to the short distance between the heat-quenching air and the mold and the collection device, it is bonded.
The spinners are heat bonded, although they can be chemically or mechanically bonded.
In the spinning non-woven fabric, it is mainly composed of two parts: the melting method and the spinning method.
Flashspinning is a complex and difficult method of making textile-bonded fabrics, as a pressurized solution that needs to be rotated and heated under precise conditions.
The biggest market for flash spinning PE is protective clothing.
Up to now, DuPont\'s Tyvek is the most important non-woven fabric produced in this field.
In many different end-use areas, the use of protective clothing is growing at an attractive rate.
Tyvek is still the most important fabric in this market.
Other End-Uses of Tyvek include envelopes, packaging, sterile packaging, graphics and packaging.
Electrostatic spinning provides a method for the production of microfiber nets with fiber diameter at nano-scale.
Although the feasibility of electrostatic spinning has been known for decades, it has recently gained considerable interest due to the unique properties of the fiber, which can be customized
Made by controlling the conditions of rotation and the solution of rotation.
Recently, the application of electrostatic spinning non-woven fabric has expanded from the medical field to the filter field, from the military field to the consumer field. Nanofiber-lined chem-
Bio suits has lightweight, breathable, multi-functional clothing that adds chemical features to provide protection against harmful liquids, steam, and nebulized toxins.
There are some commercial non-woven fabrics on the market today.
Microfiber filters for Donaldson, DuPont, Finetex and Nano
Tex\'s spill-proof fabric is one of the few but growing commercial nano-fiber non-woven fabrics that has penetrated into the market.
One of the challenges in the production of commercial nanofibers is the low throughput in the electrostatic spinning process.
Finetex, eSpin, donalson and NanoStatics are active participants ahead of this massive development.
They demonstrate the commercial scale throughput of mass production of nano-fiber and nano-fiber non-woven fabrics.
Their commercial technology can produce nanofibers ranging in diameter from 50 to 500 nm.
The thickness of Nanowebs can range from 100 nm to more than 200 microns.
With the emergence of commercial electrostatic spinning technology, the industry is now likely to invest capital in electrostatic spinning technology, but for large electrostatic spinning technology, it is still in the early stage of the commercial process
Large-scale production of nano-fiber. Nonwoven Web-
Bonded non-woven fabric (
Mainly dry shop, gas shop and wet shop)
It can be bonded by four basic bonding techniques: needle punching, hot bonding and resin bonding, water Thorn (Water wrapped)and chemical (latex)bonding.
Needle punching is a web bonding process and needle-
Perforated non-woven fabric is produced by mechanical orientation and interlocking spinning the fibers that stick or comb the fabric.
This mechanical interlocking is achieved through the repeated access of thousands of felt needles into and out of the network.
Fiber can be natural or synthetic.
Water thorn is a non-woven adhesive process.
The network can be formed by drying (carded)
Wet shop, gas shop (
AirPods when water Spurs)
Recently, there are non-woven fabrics. Spunlacing (
Water thorn or water thorn)
It is to wrap the non-woven fabric of loose fiber on the porous belt or by placing the fiber in a multi-row fine height-
Pressure injection of water.
The advantage of the water Thorn technology is its soft, moderate strength, good water absorption and beauty.
In North America and Europe, the main end market for water Thorn materials is for medical applications such as surgical gowns and related garments, packing parts for operating rooms, sponges, bandages and medical wipes.
Dry wipes have always been an important market for water Thorn materials,
Global wet wipes market is the most important terminal
Especially in Europe.
Freudberg\'s \"Evolon\" material is a recently developed water Thorn network/Water thorn technology.
The Web is made of a spun PET/PA two-component fiber and then goes through the high
Intensity water spray for split segments
The Pie two-component fiber enters its microfibers and combines them into a fabric that is strong, sol % and durable.
Emerging markets, including China, South America and Eastern Europe, have added considerable capacity.
The main producers of water Thorn non-woven fabrics are Dupont, olendi, Jacob Holm and water Thorn technology.
Hot bonding includes pressing (
Common or patterned)
Adhesive by air, infrared heating and ultrasonic.
The largest single market for Carded heat-bonded polypropylene is the lid stock, but it has moved from the carded heat-bonded lid to the textile-bonded polypropylene material.
Chemical bonding includes total saturation, foam adhesives, solvents, and patterns (print bond).
Bonding the net by chemical method is one of the most common bonding methods.
Apply the chemical adhesive to the web and solidify.
The most commonly used adhesive is latex, because it is economical and easy to apply, and it is very effective.
Several methods are used to apply the adhesive, including saturated bonding, spray bonding, printing bonding, and foam bonding.
For industrial wipes, chemical bonded non-woven fabrics are higher than the proportion of consumer wipes, but still lag behind the water Thorn non-woven fabric, which has made a difference in these end uses over the past five yearsShort-
The third is fiber fabric.
For household wipes, the chemically bonded non-woven fabric is almost the same as the water-piercing non-woven fabric.
Other applications for chemical bonded non-woven fabrics include building and roofing materials, medical and packaging.
There are two main types of non-woven raw materials in technical application: polymer resin and staple fiber.
Polymer resin is used for spinning and pasting methods such as spinning method, melting and spraying method, flash speed method and electrostatic spinning method.
Staple Fibers use different bonding methods discussed earlier, such as thermal bonding, needle bonding, chemical bonding and water entanglement, for drying, air bonding and wet bonding processes.
Polypropylene and polyester are still two main polymers in non-woven fabrics for technical applications.
Two-component fibers are increasingly used in staple fibers to enhance the uniformity and excellent performance of technical non-woven fabrics such as PP/PE, PET/Nylon6 two-component fibers.
Two-component fibers are usually formed by continuously squeezing out two polymer components from two separate extruder at the same time, forming an overall filament strand through the same rotating hole mouth of the jet head.
The two components have different interfaces along the direction of the fiber axis, instead of mixing evenly;
There may be different configurations or patterns for both parts.
With the development of modern science and technology, the new two-component fiber has entered the world rapidly.
At present, there are several types of commercial two-component fibers :(1). Side-by-side (2). Sheath-
Including concentric and eccentric (3). Islands-in-the-sea (4).
Citrus, wedge or segment pie (5). Hollow or non-hollow (6).
Regular round Crosssection (7).
Not regularlyround cross-
Including flat belt, multi-leaf belt, triangle, parallel Belt, etc.
Each two-component fiber has its unique properties and applications. Side-by-
Side fibers are mainly used for production
Curl effect based on different physical or chemical properties of two components in the same fiber. Side-by-
As the name implies, the side two-component fiber is generated by rotating the two fiber components together at the same time, thus connecting vertically.
The chemical composition of these two components may be different or vary in some properties, such as molecular weight or degree of crystal, which provides different expansion or contraction.
These two fibers can combine the advantages of the two fibers, such as good strength, good conductivity or good hydrophilic performance, and low cost.
Two-component fiber with Cross
Segment configuration other than sheath
The core type can produce finer microfibers by means of fiber splitting technology or a component dissolution technology.
The main fibers of dry cloth non-woven fabric include polypropylene, polyester, artificial silk, cotton, nylon, double fiber and other fibers.
PP fiber is widely used in non-woven fabrics for its superior performance and relatively low cost.
While polypropylene has declined in the disposable market, this fiber will continue to grow in the durable non-woven market.
Most of the durable end markets for polypropylene staple fibers are needle-punched non-woven fabrics.
The main markets include geotextile, car carpet, coated substrate, indoor/outdoor carpet, blanket, upholstered furniture and bedding.
The polyester stabilized fiber combines its excellent strength and toughness at a cost lower than the artificial silk.
Polyester Staple Fiber is drain and ideal for light fiber
Weight-oriented fabrics used in the disposable goods industry.
Even if the internal absorption medium is saturated, they provide a clear sense of drying on the surface.
With the development of new methods of polyester fiber processing and bending, artificial silk staple fiber is being challenged by polyester staple fiber on the market.
The main driving force for polyester fiber growth is the increased demand for fiber and container resin.
75% of the whole polyester production is made for polyester fiber.
Hoechst, DuPont and Eastman are the top three polyester manufacturers in the world.
The artificial silk fiber is characterized by high absorption, soft and comfortable, easy dyeing and curtains.
In order to obtain higher water retention, high water absorption artificial silk fiber has been produced (
Although the weight of ordinary artificial silk is only 100% of its weight).
These fibers are used for non-woven fabrics for surgery.
These fibers are obtained by including water.
Maintain polymer (
Such as sodium polypropylene or sodium methyl acetate)
In the viscose before textile, the water retention within the weight range of 150 to 200% is obtained.
For air flow and wet paving non-woven fabrics, pulp and mixtures with synthetic fibers (
Including two-component fibers)
It\'s already very short.
Products cut from ows have been widely used in the production of non-woven fabrics with air flow and wet shop.
Pulp is widely used in paper products and airlaid non-woven fabrics with great absorption capacity for sanitary products, as well as recent food mats and packaging products.
Paper products, including newspapers, copy paper, household and sanitary paper, consume 15% of the world\'s total commercial pulp production.
Globally, the number of products used to manufacture personal hygiene products and other absorption products is very small, less than 1%.
To the direction of thinner water absorbing products, the performance of water absorbing products is challenged to move the fluid more effectively in the adsorption structure.
As mentioned above, all stable fiber combinations for dry shop processes can be used for both empty and wet shop processes.
The water Thorn non-woven fabrics used by the water Thorn method have PP, PET, PE, nylon, PLA, etc.
Polypropylene has several advantages over other resins that continue to drive its growth in the new market and maintain its dominant share relative to other resins.
The price of polypropylene resin is usually lower on a per ton basis.
In addition, its proportion is less than 1, lower than that of competitive polymer;
As a result, the producer using polypropylene has a higher output per ton compared to the competing resin.
Polypropylene has good physical and chemical properties, resulting in a wide range
Based on market acceptance. High-
DuPont uses density polyethylene in its proprietary Flash memoryTextile Technology.
Special polymers for non-woven fabrics include carbon fiber, high absorbent fiber, polyethylene, fiberglass, metallic fiber, submesh resin and polymer.
Special fibers are designed for specific uses that require special strength, heat resistance, water absorption and/or chemical resistance.
They are usually niche products, but they are also produced in large quantities.
The application of carbon fiber non-woven fabric mainly focuses on protective clothing and high temperature refractory materials.
Flame retardant insulation (e. g.
Charge)
As a conductor or semiconductor.
The reason why carbon fiber spun from molten asphalt is interesting is because the carbon yield of the front body is high and the cost of the starting material is relatively low.
The stability in the air and the carbon in nitrogen can occur with the formation of a molten asphalt mesh.
The process was developed with the same-sex asphalt and the opposite-sex intermediate phase asphalt.
The intermediate phase asphalt and the fused non-continuous carbon fiber have a unique structure.
These fibers are characterized by a large number of small domains with an average equivalent diameter of 0 per domain.
Nearly one-way orientation of 03mm to 1mm and folded carbon layers, assembled into mosaic structures at intersections
Part of carbon fiber.
The folded carbon layer of each domain is oriented at an angle with the direction of the folded carbon layer adjacent to the boundary. Glass fiber (fiberglass)
It is the oldest and most familiar special fiber.
Fiberglass provides a wider range of properties that can be found in a variety of end-use, such as heat insulation batting, refractory fabrics, and reinforced materials for plastic composites.
John Manville is one of the largest manufacturers of fiberglass non-woven fabrics for roof and building insulation.
High absorbent fiber (SAF)
It\'s been several years.
Alternative forms such as foam and film are still in the development stage.
At present, the global production capacity of high absorbent fiber is about 3 million tons, of which large
Scale expansion project recently launched by technology absorption Co. , Ltd. (TAL)
This will be aimed primarily at the health and food markets.
This is much smaller than the capacity of tens of millions of super absorbent powders.
From high absorbent fiber (SAF)
In recent years, it has been used in the form of absorbing hygiene and food mats, which is a rapid
Non-woven market continues to grow.
Using the SAF with airlaid non-woven fabric can be designed with a thinner fabric structure with better absorption.
Aromatic fiber is the most famous high-
Properties of synthetic organic fibers.
Aramids is a polyamide derived from aromatic acids and amine and is closely related to nylon.
Due to the stability of the Fang ring and the increased strength of the amide bond, due to the combination with the Fang ring structure, the aramids have higher tensile strength and heat resistance than the fat family polyamides (nylons).
High impact resistance of counterpoint line
Aramids have made them popular in ballistic materials.
For many applications with lower requirements, aramids can be mixed with other fibers.
Needle-piercing non-woven fabric containing this high-performance fiber is used for \"bulletproof\" body armor.
The development of technology non-woven nano-technology in the treatment of materials science and engineering at a size of about 1 to 100 nm is called nano-technology.
The textile and non-woven industries are the main beneficiaries of advances in nanotechnology.
The progress in the application of nanotechnology in improving textile performance provides a clear high economic potential for the growth of the industry.
In recent years, nanotechnology has been proved to be used to enhance the technical textile properties such as durability, air permeability, water resistance, flame resistance and antibacterial properties in fibers, as well as the net
In addition to the millions of dollars invested by the private sector, it is estimated that in 2003, governments around the world spent about $3 billion on nanotechnology research and development.
It is expected that in the next decade, although advances in nanotechnology may turn into more than one
Billions of dollars of industries with relevant economic and ecological benefits for the textile and non-woven industries.
The properties and properties of fibers and fabrics are essential for the manufacture and utilization of fabrics.
Ordinary and exquisite
The diameter of textile fibers varies from 1 to 100 microns, produced by mature dry fiberswet-
1-drying, jet melt rotation and melt spray process through the spray head
100 micron in diameter.
Nano-fibers in diameter
Although there are other methods, the scope of the instrument is mainly manufactured through the electrostatic spinning process.
In electrostatic spinning, a charged polymer melt or solution passes through a sub-
A thousand-foot-diameter wire-spraying board, used to withstand the fibers of the wire-spraying board and the grounding collection board with a high potential difference between the plate.
This process is an established technology for producing fibers with extremely small diameter and enhanced performance.
The fiber strength and conductivity were further enhanced by heat treatment.
The resulting nanoparticles can find applications such as bullets.
Body armor and airwaves-
Fabric of tolerance.
Carbon nanotubes (CNT)
Fiber that provides ultra-high strength and performance.
Super-is displayed-
The aligned carbon nanotubes array provides nanofibers that exhibit elastic modulus in the TPa range, with a tensile strength equal to 200 GPa, an elastic strain of up to 5%, and a fracture strain of 20%.
However, it should be mentioned that the mechanical properties of carbon nanotubes-enhanced textiles or non-woven fabrics do not necessarily meet the very high level of performance of the constituent nanoparticles.
This is because enhancing the lateral surface effect of textiles may not always be proportional to the mechanical properties of the latter, which are traditionally determined by their linear direction.
The application of nanotechnology in special fields is increasing day by day
Objective to determine the advantages of non-woven fabrics and related composites by utilizing the lateral surface properties of the enhanced materials.
It was found that unique composite fibers were produced from synthetic nanoparticles. fibers (and webs)
Obtained through advanced electrostatic spinning processes such as solidification-based carbon-
Nano Tube rotation method
These composite fibers provide electronic textiles or non-woven fabrics for super capacitors.
In the process of Electric spinning, nano-fibers composed of various fibers
Wall carbon nanotubes (MWCNT)
By a few (Usually 7 to 20)
Single-concentric cylinder
Wall CNT, can be produced by simultaneously reducing the fiber diameter and increasing the distortion (
Up to 1000 times)
In the process of electrostatic spinning
These highly twisted fibers help to gain additional strength, toughness, and energy
Damping capacity, therefore, can be used to produce electronic textiles or non-woven fabrics that support multiple uses
Functions such as drive capability, energy storage capability, radio or microwave absorption capability, electrostatic discharge protection capability, textile heating or wiring capability of electronic equipment.
It is now clear that the current development of nanotechnology
Fiber non-woven fabrics will be used to produce the next generation of technical textiles that will be able to provide radio or microwave absorption, electrostatic discharge protection, textile heating or wiring for electronic equipment.
In the past decade, nanotechnology has developed by leaps and bounds.
It has a large number of applications in almost all major industries including textiles and non-woven fabrics.
Nanotechnology has great profit potential in the textile and non-woven industries.
The application of nanotechnology can economically expand the performance, performance and value of textile processing and products.
Super strong, durable and specific by deploying nanotechnologyfunction-
Technology-oriented textiles and non-woven fabrics can be effectively produced for many terminals
Use applications including medical, industrial, military, home, clothing and household items.
It is now conceivable that by combining fiber optic, micro mirror, functional coating and electronics, customized fabrics and garments can be developed, which will change their color according to the wishes and tastes of consumers.
The textile industry undoubtedly has the largest customer base in the world.
Therefore, the progress of customers
Targeted products will be the main focus of the application of nanotechnology in the future, and the textile and non-woven fabric industry is expected to become one of the biggest beneficiaries.
Needless to say, however, there must be some limitations and unknown health risks to the rapid development and growth of nanotechnology and its ultimate goals
Also use the product.
For example, the processing of carbon fiber

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