- Non-woven Draw Fabric
- Flame Retardant Non Woven
- Non Woven Hair Curly Paper
- Cable Wrapping Non Woven
- Medical Non Woven Fabric
- Non Woven Filter Fabric
- Interlining Fabric
- Cable Wrapping Tapes
- Other Fabrics
- Hot Air Through Nonwoven
Viscose staple fiber and polyester staple fiber are widely used in non-woven fabrics
In recent years, the proportion of viscose staple fibers and polyester staple fibers in the non-woven fabric industry has increased, but due to performance constraints, their products are mostly used in the spunlace non-woven fabric industry, and a few are used in the spunlace non-woven fabric industry. In the needle-punched non-woven industry, the proportion of other non-woven fabrics is very small.
Viscose Staple Fiber for Nonwovens - High White Viscose Staple Fiber
In 2019, the existing production capacity of China's viscose staple fiber industry is 4.985 million tons, and the apparent consumption is 3.692 million tons. 10,000 tons, of which about 11% are applied to the field of non-woven fabrics. In the non-woven field, the whiteness index of viscose fiber is higher, and the viscose fiber used in the field of technical textiles is usually called 'high white viscose fiber' in the industry. At present, there are 5 enterprises in the country that produce high-white viscose staple fiber, and the total output of high-white viscose staple fiber in 2019 is 420,000 tons.
At present, most of the mainstream manufacturers of high-white viscose staple fiber in China do the whiteness test according to the common viscose staple fiber testing standard (GB/T 14463-2008). At present, the whiteness of most enterprises has reached 90 %about.
Polyester staple fiber for non-woven fabrics - spunlace polyester staple fiber
Annual production capacity of China's polyester staple fiber (melt direct spinning) industry in 2019 7.901 million tons, the actual output is 6.2526 million tons, and the domestic consumption is around 5.62 million tons, of which 11.15% is applied to the field of non-woven fabrics. The application of polyester staple fibers in the non-woven industry is mainly spunlace non-woven fabrics, while a small number of other fields are used in the needle-punched non-woven fabric industry.
From the perspective of specifications, spunlace polyester staple fibers are mainly 1.56dtex*38mm, and staple fibers for needle-punched non-woven fabrics are mostly 2.22dtex*51/65mm. From the perspective of origin, the current production of spunlace polyester staple fiber is concentrated in Jiangsu area, among which the supply of Yizheng Chemical Fiber, Suzhou Jiangnan, Jiangyin Huaxi Chemical Fiber is basically the same, and there are also a small amount of spunlace in Zhejiang, Anhui and Fujian. Short fiber production, with a total production capacity of around 900,000 tons, about 30% for export.
Types of non-woven fabrics
There are many types of non-woven fabrics, which can be mainly divided into spunbond non-woven fabrics, water-based Barbed non-woven fabrics, needle-punched non-woven fabrics, melt-blown non-woven fabrics, heat-bonded non-woven fabrics (including hot air, hot-rolled and ultrasonic bonding), pulp air-laid non-woven fabrics, wet-laid non-woven fabrics , stitched non-woven fabrics, hydrophilic non-woven fabrics. At present, the production process of China's nonwovens industry is mainly spunbond.
Types of non-woven fabrics required for masks
Due to the impact of emergencies, the demand for masks has increased due to increased equipment. Among them, medical surgical masks and N95 masks generally use multi-layer structures, referred to as It is SMS structure: spunbond layer (S) on both sides inside and outside; meltblown layer (M) in the middle, generally divided into single layer or multi-layer. Flat masks are generally PP spunbond + meltblown + PP spunbond, and three-dimensional cup masks are generally PET polyester needle punched cotton + meltblown + needle punched cotton or PP spunbond.
It can be seen that the non-woven fabrics required for masks are mainly spunbond and meltblown, and the fiber diameter of spunbond non-woven fabrics is relatively thick, about 20 microns. The process of meltblown non-woven fabrics is to feed the polymer - melt extrusion - fiber formation - fiber cooling - web formation - reinforcement into cloth. The diameter of melt-blown fibers can reach 1-5 microns, and they are generally made of polypropylene materials with high-melt fat fibers. These ultra-fine fibers with unique capillary structure increase the number and surface area of u200bu200bfibers per unit area, thereby making melt-blown fabrics. It has good filtering, shielding, thermal insulation and oil absorption, so meltblown cloth can be called the 'heart' of medical surgical masks and N95 masks. However, the domestic production of meltblown non-woven fabrics is relatively low.
Can masks be spunlaced non-woven fabrics?
It is useful, but it is relatively rare. Now some mask companies have chosen to use spunlace fabrics for the inner layer, because they can absorb moisture and perspiration. Produces water vapor, soft and comfortable. And on February 10, a subsidiary of Huamao Co., Ltd. stated that the pure cotton spunlace non-woven fabric produced can be used as the inner layer (skin layer) of N95 masks. China Textile Institute's product WesellTM (English name NWCELLTM) has been applied to medical masks and other fields.
The raw material of the spunlace non-woven fabric
The surface of the spunlace non-woven fabric is more delicate, and the production process is cleaner than that of acupuncture. Its greatest application is in hygiene materials (including medical materials, Dry and wet wipes, beauty products, etc.), followed by synthetic leather base cloth, and finally other industrial clothing and filter materials. And because most of the spunlace uses disposable wiping sanitary materials, considering environmental protection, it is necessary to improve the degradability, so the main raw material of spunlace non-woven fabrics is mostly bio-based fibers, but at present domestic spunlace non-woven fabrics The main raw materials of cloth are mainly polyester and viscose, and it is expected to focus on bio-based fibers such as viscose and cotton in the follow-up or gradually. At present, the national spunlace non-woven production enterprises are mainly concentrated in Jiangsu and Zhejiang provinces, as shown in the figure below.
In summary, whether it is high white viscose staple fiber or spunlace polyester staple fiber, only a very small amount is used in the production of masks, but relying on spunlace The degradable and flushable properties of non-woven fabrics will gradually be widely used in sanitary materials and other aspects.
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