Cement bag manufacturers analyze the specific performance of common characteristics of plastic woven bags
1, light weight
Plastics are generally relatively light, and the density of plastic braid is about 0, 9-0, 98 g/cm3. Commonly used polypropylene braid. If no filler is added, it is equal to the density of polypropylene. The density of polypropylene for plastic weaving applications is 0, 9-0, 91 grams per cubic centimeter. Braids are usually lighter than water. The high breaking strength plastic braid is a kind of flexible and high breaking strength material in plastic products, which is related to its molecular structure, crystallinity, and drawing orientation. It is also related to the type of additives. If the specific strength (strength/specific gravity) is used to measure the plastic braid, it is higher than or close to the metal material and has good chemical resistance.
2, plastic braid versus inorganic
Organic matter has good corrosion resistance below 110 degrees Celsius and has no effect on it for a long time. It has strong chemical stability to solvents, grease, etc. When the temperature rises, carbon tetrachloride, xylene, turpentine, etc. can swell it. Fuming nitric acid, fuming sulfuric acid, halogen elements and other strong oxides will oxidize it, and it has good corrosion resistance to strong alkalis and general acids.
3, good abrasion resistance
The coefficient of friction between the pure polypropylene plastic braid is small, only about 0 or 12, which is similar to nylon. To a certain extent, the friction between the plastic braid and other objects has a lubricating effect.
4, good electrical insulation
Pure polypropylene braid is an excellent electrical insulator. Because it does not absorb moisture and is not affected by the humidity in the air, the breakdown voltage is also high. Its dielectric constant is 2, 2-2, and its volume resistance is very high. The good insulation of plastic braiding does not mean using it for production. Use of insulating materials.
5. Environmental resistance
At room temperature, the plastic woven fabric is actually completely free from moisture erosion, the water absorption rate within 24 hours is less than 0, 01%, and the water vapor penetration is also very low. At low temperatures, it becomes brittle and brittle. Plastic braid will not be mildewed.
6. Poor aging resistance
The aging resistance of plastic braid is poor, especially polypropylene braid is lower than polyethylene braid. The main reasons for its aging are heat itch aging and photodegradation. The poor anti-aging ability of plastic braid is one of its main shortcomings, which affects its service life and application areas.
Post time: Jan-29-2021