Is Needled Non-woven Fabric The Thicker The Better

The increase of nonwovens thickness means the increase of weight and strength per unit area, but due to the structure, the increase of thickness does not mean the increase of microbial barrier performance. For example, when a thickened non-woven fabric is used, the weight of its spunbond layer cannot effectively increase its antibacterial performance. Only when the pore diameter of the key filter layer (i.e. melt blown layer) can effectively filter the invasion of microorganisms and dust, its antibacterial performance can meet the requirements. With the increase of thickness, the air permeability of packaging materials will be affected, and the probability of wet package will be increased.

Because it is a kind of fabric that does not need spinning and weaving, it is only made by directional or random supporting of short textile fibers or filaments to form a fiber net structure, and then reinforced by mechanical, thermal bonding or chemical methods. In short, it is not interweaved and knitted by one yarn, but the fibers are glued together directly by physical methods, so when you get the scale in your clothes, you will find that there is no thread out. Nonwovens break through the traditional textile principle, and have the characteristics of short technological process, fast production speed, high output, low cost, wide use and many sources of raw materials.

In clinical use, the non-woven fabric will be damaged after sterilization. For this kind of damage, the main reason is that the micro fine plastic fiber of the non-woven fabric will shrink to a certain extent after high-temperature sterilization, which shows that the non-woven fabric after sterilization is crisper than before sterilization. Therefore, too much force or unreasonable taking and placing methods will cause packaging materials during the use process Destructive damage, in addition to the use of burr and sharper edge of the device will also cause non-woven damage. In this case, it is suggested that the clinical packing should be properly tightened, handled with care, and the double-layer packing recommended by the standard should be used, which will greatly reduce the probability of damage. If it is only through improving the thickness of non-woven fabric to solve the problem of damage, in addition to ensuring the antibacterial performance, it is also necessary to closely observe the probability of wet pack.

In a word, the thicker the nonwovens are, the better the thickness is. On the premise of bacteria resistance and tensile strength, the wet bag phenomenon of materials with good air permeability will be reduced.