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PP Spunbond Nonwoven Fabric The Raw Material,

Yiwu Guanghong Non-Woven Co.,Ltd | Updated: Sep 28, 2017

PP Spunbond Nonwoven material a: methyl list at the same side of the main chain molecules called isotactic polypropylene, if methyl chaotic lists at both sides of the main chain molecules called atactic polypropylene, when methyl alternating list at both sides of the main chain molecules called syndiotactic polypropylene. In the polypropylene resin produced by individual property, the content of the isotactic structure is about 95%, and the rest is the non-regulation or the polypropylene. The product of property is an important component. Polypropylene also includes copolymer of propylene and a small amount of ethylene. All is translucent and colorless solid, odorless and non-toxic. Because of its neat and high crystallization structure, so the melting point can be as high as 167 ℃. Heat resistance, erosion resistance, the use of steam sterilization is its outstanding benefit. Small density, the lightest general purpose plastic. The shortness of the fault is that the low temperature impact is poor, and it can be aged easily, but it can be overcome by process modification.

Copolymer of PP material with low thermal deformation temperature (100 ℃), low transparency and gloss, low rigidity, but have stronger impact strength, impact strength of PP as the growth of the ethylene content increases. PP vicat softening temperature is 150 ℃. Due to the high degree of crystallinity, the profile rigidity and anti-scratch characteristics of such materials are very good. There is no problem of stress cracking in PP.

The melt quality of PP (MFR) is at 1~ 100. PP materials with low MFR have good anti-impact characteristics but low tensile strength. For the non-isomfr materials, the copolymerization type of anti-impact strength is higher than the homotype. Because of the crystallization, the shortening rate of PP is quite high, all is 1.6~ 2.0%.

Pp non-woven fabric in the machining process, due to chemical adhesives, additives, or the influence of low temperature drying, inspire feel is rough and stiff shortcomings, this limits the nonwovens in certain scale of operation. Many non-woven products, such as sanitary napkin fabrics, are sanitary and protective. All kinds of clean wipe city request pp non-woven fabric has better optimal flexibility, so the non-woven sanitary materials need to be cleared. Often operation of the establishment of search machinery and chemistry.

1. Mechanical rubbing and flexo liquidation

Mechanical rub song indecision chimes if clearing the after process to knead or shortening of nonwoven fabric, to land its rigid policy to achieve the fainthearted, there are two kinds of such soft round liquidation important mechanical freedom of establishment, namely carat parker and Michael les method.

1The clapak method was first operated in papermaking property and then transplanted in wet nonwoven fabric. The following figure shows that nonwovens can obtain excellent flexibility and improve the hand feeling after being used. The liquidation of the method is determined by the thickness, elasticity, fiber characteristics, pressure, fiber network structure and thermal wet conditions of the rubber belt.

2Michael Clayton, method of pp non-woven extrusion impregnation is very strong, is in the nonwovens profiles produced crepe, forward nonwovens delayed sex, increase the unit area of the component and product, and carat park method of comparison, the establishment of the improvement of the nonwovens better optimal flexibility. The crepe of the McCrex method can be used to test the crepe number and evaluate the extent of the growth of the unit area or the elongation of nonwoven fabric. Therefore, the liquidation of this method depends largely on the geometrical size of the crepe zone and the input and output speed of pp non-woven fabric.


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