Non Woven Fibres

The most important part of non-woven fabrics, this article is summarized in four words: forming a network, strengthening. Therefore, this article briefly introduces several of the most common network formation and reinforcement methods.
1. Cotton is mainly made by carding.
Similar to the principle of carding in spinning, the different points of carding are as follows
(1) The process of non-woven carding produces --- the arrangement and orientation of fibers in the fiber web, which requires 'chaotic technology' and 'cohesion technology' to achieve the isotropic properties of non-woven materials
(2) Non-woven materials The fiber web has a higher unit area density (g/m2) and thickness (mm), so some fiber webs from the carding machine need to be laid and stacked
The principle of carding into a webCarding is the key process of web forming. The open, mixed and prepared small cotton bundles are combed into a thin web composed of single fibers for laying up into webs, or direct reinforcement, or airlaid for weaving A web of randomly arranged fibers.
The equipment used for carding can be either a 'roller-type' carding machine or a 'flat-plate-type' carding machine.
The fibers in the fiber web directly output by the carding machine doffer are arranged in parallel in the longitudinal direction and have good orientation; the fibers are arranged in two dimensions after carding by 'chaotic roller/p>After air-laid, the fibers are three-dimensionally arranged and have good non-orientation.
2. The reinforcement methods are mainly acupuncture and spunlace
(1) The principle of reinforcement by acupuncture
Using triangular sections (or other sections) ) The barbed barbs on the edges repeatedly puncture the web. As the barbs pass through the web, the surface and local inner fibers of the web are forced into the interior of the web. Due to the friction between the fibers, the originally fluffy web is compressed. When needle punching pushes out the web, the pierced fiber bundles are separated from the barb surface and remain in the web, so that many fiber bundles are entangled in the web and can no longer return to the original fluffy state. After many times of needling, a considerable number of fiber bundles are inserted into the fiber web to form a 'three-dimensional structure
(2) Principle of spunlace reinforcement technology
The principle of spunlace reinforcement is similar to that of acupuncture, but instead of needling Water jets jet the web. After the water jet passes through the fiber web, it is supported by the rebound of the net curtain and penetrates the fiber web again. As a result, the fibers in the fiber web are displaced, interspersed, entangled and cohesive under the hydraulic action of the high-speed water jets in different directions. The web is reinforced.
3. Spunbond method
Traditional textile process: blowing→carding→drawing→roving→spinning→winding→warping→sizing→reeding→weaving →Cloth
Ordinary non-woven process: fiber raw material→web→reinforcement→non-woven material
The non-woven process using chemical fiber as raw material can also be shrunk again, that is: high Polymer→web→reinforcement→non-woven material, this is the non-woven technology of spunlaid process and melt blowing process.
In the reinforcement technology of high polymer, in addition to the traditional needle punching method and hydroentangling method, there is also a method called hot rolling.

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The following points should be paid attention to in the maintenance and collection of non-woven fabrics in life:

1. Keep it clean, change and wash frequently, prevent the breeding of moths, and store it in different seasons. It must be washed, ironed, dried, and then sealed in a plastic bag, and placed flat in the wardrobe
2. Pay attention to shading to prevent fading. It should be often ventilated, dusted and dehumidified, and not exposed to the sun.
An anti-mildew and moth-proof tablet should be placed in the wardrobe to prevent the cashmere products from being damp and mouldy. When wearing inside, the matching coat lining should be smooth. Avoid hard objects such as pens, key cases, mobile phones, etc. (such as sofa backs, armrests, table tops) and hooks.
The wearing time is not easy to be too long, and it should be stopped or changed for about 5 days to restore the elasticity of the clothes to avoid fiber fatigue damage. In addition, the following aspects should also be paid attention to
1. Avoid exposure to the sun, easy to decompose and dry places
2. Try to avoid friction as much as possible, the friction-resistant cloth is relatively brittle, and the tension If a good cloth is rubbed vigorously, it will fluff.
3. If there is pilling, do not pull it forcefully. You must use scissors to cut the pom-pom off, so as not to be irreparable due to off-line.
The above are the points that need to be paid attention to in the maintenance of non-woven fabrics. The content of non-woven fabric manufacturers on the maintenance of non-woven fabrics is described here.

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Non-woven medical protective materials were developed in the 1990s. At that time, some developed countries in Europe and the United States used advanced non-woven technology to develop a spunlace non-woven fabric with low cost, appearance and feel close to traditional textiles , becoming an excellent material to replace traditional textiles. Up to now, the processing methods of non-woven medical protective materials have been relatively mature. According to the different preparation technologies, there are mainly spunbond, meltblown, SMS composite technology, spunlace and flash evaporation.
Spunbond non-woven technology
Spunbond non-woven material as a protective material can meet the requirements of strength and comfort, but its barrier properties are relatively weak. In response to this problem, fine denier spunbond technology has become a major research hotspot. The two-component spunbond spunlace technology first invented by Freudenberg (Freudenberg) in Germany uses a hollow orange-lobed spinning assembly to extrude a thin stream of melt from the spinneret hole, and then cool and blow air and draft by air. The formed filaments are laid on the netting curtain, and then the high-pressure spunlace technology is used to open the fiber and fix the net. Its barrier properties are relatively better than ordinary spunbond or spunlace non-woven materials, so it can be used as a medical protective material.
Turkish non-woven manufacturer Mogul recently launched a material that can be used in surgical gowns. Its fibers are 100 times thinner than a hair after opening, which can block microorganisms, resist blood and The characteristics of alcohol also have good moisture absorption, air permeability and heat insulation. The microporous structure and protective properties of this non-woven material make it an ideal material for medical protective clothing.
Melt-blown non-woven technology
The biggest feature of the melt-blown method is that the fibers are very fine, the structure is fluffy after self-bonding, the porosity is high, the average pore size is small, and the The barrier properties of the product are not high, but the strength and wear resistance of the product are not high. Some people have made improvements on this basis, drawing on the spunbond technology, and under the condition that the fiber fineness remains unchanged, the melt stream blown by hot air is subjected to short-distance cooling and blowing, and then the fixed mesh is thermally bonded. , it is found that the strength of the product has been improved, and it can be applied to occasions where the strength requirement is not too high.
Considering the problems of thin meltblown fibers and poor compression resilience, 3M company in the United States took the lead in developing the intercalation meltblown technology, that is, in the process of traditional meltblown production, spraying in the meltblown fiber flow Blowing into the hollow elastic short fibers of coarse denier and high crimp, under the same gram weight, the compression resilience of the product is greatly improved, the structure becomes more fluffy, and the air and moisture permeability is also improved; in addition, the particles pass through the material. The tortuous path becomes longer, which increases the interception effect and greatly improves the particle barrier effect.
Another way to greatly improve the performance of blocking tiny particles without changing the air and moisture permeability of meltblown non-woven fabrics is the electret method. The electret meltblown nonwoven can capture more particles with opposite charges through electrostatic adsorption mechanism, thereby greatly improving its filtration performance.
SMS composite technology
In view of the poor barrier effect of spunbond non-woven fabrics and the low strength of melt-blown non-woven fabrics, some people use the strength and durability of spunbond non-woven fabrics. The abrasive property used it as the surface layer, and the barrier property of the meltblown cloth was used as the core layer to prepare the SMS composite nonwoven material. In view of the problem that most of the current SMS composite protective materials use PP as raw materials and have poor protection performance against various radioactive substances, Liu Xing and others from Tianjin University of Technology cooperated with a certain department of the Navy to coat the SMS materials with barium sulfate. It can prevent the penetration of radioactive substances, so it can be used for medical staff to avoid unnecessary radioactive substances interference and cause lesions, which plays a better role in isolation and protection. The coating material can also be made into the shape of slow-release microcapsules for coating. When subjected to external force, the microcapsules are broken and the protective performance is enhanced.
Spunlace non-woven technology
For non-woven materials in which short fibers are combed into a net and then spunlaced to fix the net, although it is soft to the skin, moisture absorption and breathability, etc. It has great advantages, but due to its poor barrier performance, it can only be used as a general medical material, and its protective performance is not very good. As early as 2009, the University of Leeds in the United Kingdom developed a type of functionalized spunlace non-woven material. This material uses a special device to form a cavity structure in the spunlace non-woven material during the spunlace process. Sustained release disinfectant capsules can be added to the structure.
This functional spunlace non-woven material with slow-release disinfectant microcapsules can be made into a cross-infection protection material and placed in the doorknob, handrail and other places where the hospital contacts the human body. When the door is closed or closed, the sick patient will pass the germs to the touch handle by hand. At this time, the microcapsules will release the disinfectant under the action of hand pressure, effectively killing the germs, and other patients or healthy people will touch the handle again. will not be infected. This kind of anti-cross-infection non-woven protective material has been applied in some hospitals in the UK, and the effect is very good.
Flash evaporation nonwoven technology
Compared with SMS, flash evaporation technology is formed by solution spinning method, and the solvent is a volatile organic solvent, which is difficult to recover. The higher concentration of the medium is easy to cause explosion accidents; in addition, in the production process, the control of the spinning speed of the fiber is very difficult. At present, this technology is monopolized by DuPont (DuPont) in the United States. The protective clothing made of its flash evaporation product Tyvek combines protection, durability and comfort to protect workers from particles as small as microns, but the cost is relatively high. higher.

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What is an Example of a Non-Woven Fabric?

Non-woven fabrics are versatile materials that have found their way into various industries. They are manufactured using synthetic or natural fibers, but unlike traditional textiles, they are not woven together. Instead, these fibers are bonded together using heat, chemicals, or mechanical processes. Non-woven fabrics offer distinct advantages such as cost-effectiveness, durability, and convenience. In this article, we will explore different examples of non-woven fabrics, their characteristics, and their applications in various fields.

I. Definition and Manufacturing Process

II. Types of Non-Woven Fabrics

III. Applications of Non-Woven Fabrics

IV. Advantages and Disadvantages of Non-Woven Fabrics

V. Future Prospects of Non-Woven Fabrics

I. Definition and Manufacturing Process

Non-woven fabrics, as the name suggests, are fabrics that are not woven together. Instead, they are made by bonding fibers together using different techniques. These fibers can be natural, synthetic, or a combination of both. The manufacturing process involves three main steps: web formation, web bonding, and finishing.

In the web formation stage, the fibers are laid out into a web-like structure. This can be done by carding, air-laying, or wet-laying the fibers. Carding involves combing the fibers and ensuring they align in a single direction. Air-laying uses air currents to disperse the fibers onto a moving belt, while wet-laying involves suspending the fibers in a liquid before depositing them onto the belt.

After web formation, the fibers need to be bonded together to form a fabric. This can be achieved through various processes. Thermal bonding involves the use of heat or ultrasonic energy to create a bond between the fibers. Chemical bonding uses adhesives or solvents to bind the fibers together. Mechanical bonding can be achieved by needling or interlocking the fibers.

Finally, the non-woven fabric goes through the finishing stage, where additional processes like dyeing, printing, or coating can be applied to enhance its properties or aesthetics.

II. Types of Non-Woven Fabrics

There are several types of non-woven fabrics available, each with its unique characteristics and applications. Some examples include:

1. Spunbond Non-Woven Fabric: This type of fabric is made by extruding continuous filaments of synthetic fibers, such as polypropylene or polyester, and then bonding them together. Spunbond fabrics are commonly used in hygiene products, agriculture covers, and packaging materials.

2. Meltblown Non-Woven Fabric: Meltblown fabrics are created by blowing hot air or steam onto a molten polymer, causing it to disperse into ultrafine fibers. These fibers are then collected on a moving conveyor belt, forming a web. Meltblown fabrics are widely used in filtration applications, such as face masks, air filters, and oil-absorbent materials.

3. Needle-punched Non-Woven Fabric: Needle-punching involves repeatedly piercing the web of fibers with barbed needles to mechanically interlock them. This process creates a fabric with excellent strength and dimensional stability. Needle-punched fabrics are often used in geotextiles, insulation, and automotive interiors.

4. Spunlace Non-Woven Fabric: Spunlace fabrics are manufactured by entangling fibers together using high-pressure water jets. This process creates a fabric with high strength, softness, and absorbency. Spunlace fabrics find applications in medical wipes, wet wipes, and personal care products.

5. Stitch-bonding Non-Woven Fabric: Stitch-bonding is a process where vertical stitches are inserted into the web of fibers, mechanically interlocking them. This technique produces fabrics with good drapability and elasticity. Stitch-bonded fabrics are utilized in mattress covers, shoe linings, and upholstery.

III. Applications of Non-Woven Fabrics

Non-woven fabrics have a wide range of applications in various industries. Some notable uses include:

1. Medical and Hygiene Products: Non-woven fabrics are extensively used in medical gowns, surgical masks, diapers, feminine hygiene products, and wound dressings. Their high absorbency, barrier properties, and cost-effectiveness make them ideal for these applications.

2. Geotextiles: Non-woven fabrics are used in geotextiles to provide soil stabilization, erosion control, and drainage. They can be found in road construction, landscaping, and geotechnical engineering projects.

3. Filtration: Non-woven fabrics are commonly employed in air, liquid, and gas filtration systems. They can remove particles, contaminants, and impurities from various fluids and gases.

4. Packaging Materials: Non-woven fabrics are used in packaging applications, such as tote bags, gift wraps, and protective covers. They offer durability, resistance to tearing, and a wide range of customization options.

5. Automotive Industry: Non-woven fabrics find several applications in the automotive industry, including interior upholstery, headliners, carpeting, and noise insulation. They provide comfort, sound absorption, and thermal insulation.

IV. Advantages and Disadvantages of Non-Woven Fabrics

Non-woven fabrics offer several advantages over traditional woven fabrics. They are cost-effective to produce, as the manufacturing process requires fewer resources and less labor. Non-wovens are also durable, as the fibers are bonded together, resulting in higher tensile strength and resistance to tearing. Additionally, they are easy to handle, lightweight, and can be designed to have specific properties like breathability, water repellency, or flame retardancy.

However, non-woven fabrics do have some limitations. They may have lower breathability compared to woven fabrics, which can be a concern in certain applications. Some non-woven fabrics may also have limited abrasion resistance or be more prone to pilling. It is important to consider these factors when selecting the appropriate fabric for a specific application.

V. Future Prospects of Non-Woven Fabrics

The demand for non-woven fabrics is expected to continue growing in the coming years. As industries seek sustainable and eco-friendly solutions, the development of biodegradable and compostable non-woven fabrics is gaining momentum. Additionally, advancements in nanotechnology and material science are opening new avenues for enhancing the performance and functionality of non-woven fabrics.

In conclusion, non-woven fabrics are essential materials with diverse applications across industries. Whether it is in healthcare, construction, filtration, packaging, or automotive, these fabrics provide innovative solutions that cater to different requirements. With ongoing technological advancements, the potential for non-woven fabrics continues to expand, revolutionizing various sectors and contributing to a more sustainable future.

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What is Non-Woven Industry?
The non-woven industry has been steadily gaining popularity in recent years. Non-woven fabrics are versatile materials that are used in a wide range of applications, from healthcare and hygiene to agriculture and construction. Despite its growing importance, many people are still unaware of what exactly the non-woven industry entails. In this article, we will delve into the intricacies of the non-woven industry, exploring its applications, manufacturing processes, and future prospects.

The Basics of Non-Woven Fabrics
Non-woven fabrics are primarily made from short or continuous fibers bonded together through mechanical, chemical, or thermal processes. Unlike traditional woven textiles, non-woven fabrics are neither knitted nor woven. Instead, their fibers are entangled together to create a cohesive structure.

Non-woven fabrics offer numerous advantages over their woven counterparts. They are generally more cost-effective, lightweight, and easy to produce in large quantities. Moreover, non-woven fabrics can be engineered to possess specific properties such as strength, elasticity, or absorbency, depending on the intended application.

The Applications of Non-Woven Fabrics
Non-woven fabrics find applications in various industries, owing to their versatility and desirable properties. Let's explore some of the most common applications of non-woven fabrics:

1. Healthcare and Hygiene
In the healthcare sector, non-woven fabrics are widely used in the production of surgical gowns, face masks, and medical wipes. These fabrics offer excellent barrier properties, preventing the transmission of infectious agents. They are also soft, breathable, and hypoallergenic, making them comfortable to wear.

In the hygiene industry, non-woven fabrics are employed in the manufacturing of diapers, feminine hygiene products, and adult incontinence products. The high absorbency and softness of non-woven fabrics ensure optimal comfort and protection.

2. Agriculture and Horticulture
In the agricultural sector, non-woven fabrics serve multiple purposes. They are used as crop covers to protect plants from harsh weather conditions, pests, and weeds. Moreover, non-woven fabrics are employed as ground covers to prevent soil erosion and retain moisture. These fabrics allow air and nutrients to circulate, promoting healthy plant growth.

3. Construction and Geotextiles
Non-woven fabrics find extensive use in the construction industry as geotextiles. Geotextiles are permeable fabrics that are used to improve soil stability, filtration, and drainage. They are often employed in road construction, erosion control, and civil engineering projects. Non-woven geotextiles provide excellent reinforcement and separation properties, enhancing the overall performance and longevity of infrastructural projects.

4. Filtration and Automotive
Non-woven fabrics are integral components in air filters, oil filters, and fuel filters. These fabrics offer high filtration efficiency, capturing dust, pollutants, and contaminants. In the automotive industry, non-woven fabrics are used in carpeting, headliners, and insulation materials due to their durability and sound absorption properties.

5. Packaging and Furniture
Non-woven fabrics are commonly used in the packaging industry for various applications such as shopping bags, gift wraps, and protective sleeves. These fabrics are lightweight yet robust, providing an eco-friendly alternative to plastic packaging materials. In the furniture industry, non-woven fabrics are used for upholstery, cushioning, and soundproofing purposes.

The Manufacturing Processes of Non-Woven Fabrics
Non-woven fabrics can be manufactured through different processes, depending on the desired characteristics and application requirements. Let's take a closer look at some of the most widely used manufacturing processes:

1. Spunbonding
Spunbonding is a popular technique used to produce non-woven fabrics. In this process, continuous filaments of polypropylene or other thermoplastic polymers are extruded and laid down onto a moving belt. Heat and pressure are then applied to bond the fibers together, forming a coherent web.

Spunbonded non-woven fabrics are characterized by their excellent strength, stability, and breathability. They find applications in protective clothing, medical textiles, and industrial filtration systems.

2. Meltblowing
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