According to the Jiangsu Provincial Market Supervision Administration website, on April 23, the Jiangsu Textile Industry Association officially released the group standard “Polypropylene Melt blown Nonwoven Fabrics for Masks” (T/JSFZXH001-2020), which will be officially released on April 26. Implementation.
The standard was proposed by Jiangsu Fiber Inspection Bureau under the guidance of Jiangsu Market Supervision Bureau, and drafted together with Nanjing Product Quality Supervision and Inspection Institute and related melt-blown fabric manufacturers. This standard is the first national standard issued for mask-blown melt blown fabrics. It is mainly applicable to mask-blown melt blown fabrics for sanitary protection. It is adopted by group members in accordance with the agreement and is voluntarily adopted by the society. The promulgation and implementation of the standard will play an active role in regulating the production and operation of melt-blown cloth enterprises and ensuring the quality of the core raw materials of masks. It is understood that group standards refer to the standards jointly established by social groups established according to law to meet market and innovation requirements and coordinate with relevant market players.
Melt blown cloth has the characteristics of small pore size, high porosity and high filtration efficiency. As the core material for mask production, the current demand is far greater than the supply. Recently, related companies have switched to melt blown fabrics, but they do not have enough knowledge about the raw materials, equipment, and production processes used. The production efficiency of the melt blown fabrics is not high, and the quality cannot meet the needs of mask production.
At present, there are two relevant industry standards for melt blown fabrics in China, namely “Spun bond / Melt blown / Spun bond (SMS) Method Nonwovens” (FZ / T 64034-2014) and “Melt blown Nonwovens” (FZ / T 64078-2019). The former is suitable for SMS products that use polypropylene as the main raw material and reinforced by hot-rolled bonding; the latter is suitable for non-woven fabrics produced by melt-blown method. The end use is not limited to masks, and the standard is only for width, mass per unit area, etc. To put forward requirements, the standard values of key indicators such as filtration efficiency and air permeability are stipulated by the supply and demand contract. At present, the production of melt blown fabrics by enterprises is mainly based on enterprise standards, but the relevant indicators are also uneven.
The group standard of “Polypropylene Melt blown Nonwoven Fabrics for Masks” released this time revolves around polypropylene melt blown nonwoven fabrics for masks, specifying raw material requirements, product classification, basic technical requirements, special technical requirements, inspection and judgment methods, and The product logo sets out clear requirements. The main technical indicators of group standards include particulate filtering efficiency, bacterial filtering efficiency, breaking strength, mass deviation rate per unit area, and appearance quality requirements. The standard stipulates the following: First, the product is classified according to the filtration efficiency level of the product, which is divided into 6 levels: KN 30, KN 60, KN 80, KN 90, KN 95, and KN 100. The second is to stipulate the raw materials used, which should meet the requirements of “Special Plastic Melt-Blowing Material for PP” (GB / T 30923-2014), limiting the use of toxic and hazardous substances. The third is to put forward specific requirements for particulate filtration efficiency and bacterial filtration efficiency corresponding to different filtration efficiency levels to meet the requirements of different types of masks for melt-blown cloth.
In the process of formulating group standards, first, adhere to the law and regulations, follow the principles of openness, transparency, and fairness, and absorb the experience of production, inspection, and management of melt-blown fabrics in Jiangsu Province, and fully consider the technically advanced and economically feasible overall The requirements, in line with national laws, regulations and mandatory standards, have been recognized by experts in the main manufacturers of melt blown fabrics, inspection institutions, industry associations, universities and scientific research institutions in the province, which is conducive to the role of standard guidance and regulation. The second is to do a good job of effectively linking the standards of melt-blown cloth products with the standards of protective masks, which can play a positive role in standardizing, improving, and rectifying a group of enterprises from a technical perspective.
The release of the group standard will effectively play the role of the group standard “fast, flexible and advanced”, help melt-blown cloth production and operation enterprises to correctly understand and master the key indicators of melt-blown cloth for masks, improve product standards, and produce in accordance with laws and regulations To provide effective technical support for regulating the market order of melt blown fabrics and ensuring the quality of epidemic prevention products. Next, under the guidance of the Provincial Market Supervision Bureau, the Provincial Fiber Inspection Bureau will work with the Provincial Textile Industry Association to interpret and publicize standards and further popularize quality knowledge related to melt blown fabrics. At the same time, it will do a good job in publicizing and implementing standards, training major production enterprises and grassroots supervisors in the province, and further guiding the production and supervision of melt blown fabrics.
Post time: Apr-26-2020