Details of several characteristics of plastic woven bags

  • Categories:Trade News
  • Time of issue:1566962940000

Details of several characteristics of plastic woven bags

  • Categories:Trade News
  • Time of issue:2019-08-28 11:29

The raw material of the plastic woven bag is made of PP (polypropylene) and PE (polyethylene). During the May 1st period, the PP market is relatively dull. The reaction to the atmosphere was less than ideal. Xiao Bian believes that the sluggish PP market may be related to the off-season of the woven bag market from May to September each year. The demand is low and the transaction volume is naturally low. Of course, with the continuous downward adjustment of crude oil prices, and the mentality of individual markets is not very stable, the prices of some PP markets have declined slightly, but the overall market has not changed much, and the impact is minimal. In the next few months, Xiao Bian believes that there is limited room for the PP market to rise. If there is no special situation, the market will maintain a stable state for a long period of time.

The plastic woven bag has the characteristics of light weight, good electrical insulation, good corrosion resistance and easy processing and molding. Plastic woven bags have some of the general characteristics of PP and its own characteristics. as follows:

1, light weight

PP is generally lighter, and the density of the PP woven bag is about 0.9 to 0.98 g/cm 3 . Commonly used plastic braids, if no filler is added, equal the density of the plastic. The plastic woven application plastic has a density of 0.9 to 0.91 g/cm 3 . The braid is usually lighter than water.

2, high breaking strength

Plastic woven fabric is a kind of flexible and high breaking strength material in plastic products, which is related to its molecular structure, degree of crystallization, drafting orientation, etc., and also related to the type of additive. If specific strength (strength/specific gravity) is used. To measure plastic braid, it is higher or closer to metal.

3, good chemical resistance

The plastic braid has good corrosion resistance to inorganic and organic substances. Below 110 degrees Celsius, it has no effect on it for a long time. It has strong chemical stability to solvents, greases, etc. When the temperature rises, carbon tetrachloride, xylene, turpentine, etc. can swell to it. Cigarette nitric acid, fuming sulfuric acid, halogen elements and other strong oxides will oxidize it, and it has good corrosion resistance to strong bases and usually acids.

4, good wear resistance

The coefficient of friction between the pure plastic braids is small, only about 0.12, similar to nylon, to some extent, the plastic braid and its articles are rubbed and lubricated.

5, good electrical insulation

Pure plastic braid is an excellent electrical insulator. Because it does not absorb moisture, it is not affected by the humidity in the air, and the breakdown voltage is also high. Its dielectric constant is 2. 2-2. 6, its volume resistance is very high, and the plastic braid has good insulation. It is equivalent to using it as insulation material.

6, environmental resistance

At room temperature, the plastic woven fabric is virtually completely free of moisture, and the water absorption rate within 24 hours is less than 0.01%, and the water vapor permeability is also very low. At low temperatures, it becomes brittle and brittle. The plastic braid does not mold.

7, poor anti-aging ability

Plastic woven bags have poor anti-aging ability, especially PP woven bags are lower than polyethylene woven bags. Its aging problem is mainly hot itching aging, photodegradation. The poor anti-aging ability of plastic braid is one of its main defects, affecting the service life and application field of woven bags.

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