Melt blown non-woven fabric is the core filter layer of the mask!

Melt blown nonwovens

PP is the main raw material of melt blown cloth, and the fiber diameter can reach 1-5 μ M. There are many gaps, fluffy structure and good anti wrinkle ability. These ultra-fine fibers with unique capillary structure increase the number and surface area of fibers per unit area, so that the melt blown cloth has good filtration, shielding, heat insulation and oil absorption. It can be used in the fields of air, liquid filter material, isolation material, absorption material, mask material, heat preservation material, oil absorption material and wiping cloth.

The technological process of melt blown non-woven fabric: polymer feeding - melt extrusion - fiber formation - fiber cooling - mesh forming - reinforcement into fabric.

Application scope

(1) Medical and health cloth: surgical clothing, protective clothing, disinfection cloth, masks, diapers, women's sanitary napkins, etc;

(2) Home decoration cloth: wall cloth, tablecloth, bedspread, bedspread, etc;

(3) Clothing cloth: lining, adhesive lining, flocs, set cotton, various synthetic leather bottom cloth, etc;

(4) Industrial cloth: filter material, insulating material, cement packing bag, geotextile, wrapping cloth, etc;

(5) Agricultural cloth: crop protection cloth, seedling raising cloth, irrigation cloth, heat preservation curtain, etc;

(6) Others: Space cotton, heat preservation and sound insulation materials, linoleum, smoke filter, tea bag, etc.

The melt blown cloth can be called the 'heart' of medical surgical masks and N95 masks.

Medical surgical masks and N95 masks generally adopt multi-layer structure, which is called SMS structure for short: single-layer spunbond layer (s) is on both sides inside and outside; melt blown layer (m) is in the middle, which is generally divided into single layer or multi-layer.

Plane mask is generally PP Spunbond + melt spray + PP Spunbond, or short fiber can be used for one layer to improve skin touch. The three-dimensional cup-shaped mask is usually PET polyester needled cotton + melt blown + needled cotton or PP Spunbond. Among them, the outer layer is a non-woven fabric with waterproof treatment, which is mainly used to isolate the droplets from the patients; the middle layer is a specially treated non-woven fabric with good filtration, shielding, heat insulation and oil absorption, which is an important raw material for the production of masks; the inner layer is a common non-woven fabric.

Although the spunbond layer (s) and melt blown layer (m) of the mask belong to non-woven fabric, and the raw materials are polypropylene, the manufacturing process is not the same.

The diameter of the spunbond fibers on both sides of the inner and outer sides is about 20 microns; the diameter of the melt blown fiber in the middle is only 2 microns, which is made of polypropylene material called high melt fat fiber.

China is the world's largest producer of non-woven fabrics. In 2018, the production of non-woven fabrics is about 5.94 million tons, but the production of melt blown non-woven fabrics is very low.

According to the statistics of China Industrial Textiles Association, the production process of China's nonwovens industry is mainly spunbond. In 2018, the production of spunbond nonwovens was 2.9712 million tons, accounting for 50% of the total production of nonwovens, mainly used in fields such as sanitary materials; the proportion of melt blown process was only 0.9%.

According to this calculation, in 2018, the domestic production of melt blown nonwovens is 53500 tons / year. These meltblown fabrics are not only used for masks, but also for environmental protection materials, clothing materials, battery diaphragm materials, wiping materials, etc.

Under the epidemic situation, the demand for masks has greatly increased. According to the data of the fourth national economic census, the total employment population of legal entities and self-employed households in China is 533 million. At least 533 million masks are needed per person per day.

According to the Ministry of industry and information technology, at present, the maximum daily output of masks in China is 20 million.

There is a huge gap in masks, many enterprises began to cross-border production of masks. According to Tianyan data, based on the industrial and commercial registration change information as the standard, from January 1 to February 7, 2020, more than 3000 enterprises in the country have added 'masks, protective clothing, disinfectants, thermometers, medical devices' and other businesses.

Compared with mask manufacturers, there are not many melt blown non-woven fabric manufacturers. In this case, the state has launched some source enterprises to put into production and improve production capacity, but at present, it is not optimistic in the face of the textile platform and textile people's circle of friends seeking melt blown non-woven fabric everywhere. China's production speed in this pneumonia is facing unprecedented challenges! But I believe that in the face of the increasingly better situation, I believe that everything will be better.