Chemical stability and acid and alkali resistance of PVC sheet

Release time: 2022-08-26

PVC sheet (polyvinyl chloride) is a flame retardant with good chemical stability and only produces low tensile cracking internal force. The properties of the material also include high strength, high rigidity and high hardness. The working temperature range is - 15 degrees to 60 degrees. It can be welded.

Characteristics of PVC sheet:

① Strong corrosion resistance: suitable for anticorrosion equipment in chemical industry.

② Convenient processing: cutting, welding and bending are very simple.

③ High strength, high rigidity and high hardness;

④ Good electrical insulation;

⑤ Good chemical stability; Self extinguishing;

⑥ Low water absorption; Easy to stick and paint;

⑦ The price is quite low.

PVC sheets are widely used in food, gifts, clothing, electrical hardware, handicrafts, toys, daily necessities, educational and experimental supplies, medical and health supplies, tourism products, electrical appliances, electronic original gas parts, agricultural products, auto parts, anti-theft locks and other plastic absorption, compression, folding and packaging, stationery production and printing.

PVC sheet has good chemical stability and acid and alkali resistance. In addition, other advantages of PVC sheets are mainly reflected in the following aspects:

① The light transmittance of the new film is better than 85%; The light transmittance of crops is small, and the wavelength of 0.3m only passes through 20%, so it is often the material of choice for PVC plastic bags, while the polyethylene (PE) shed film passes through 60%; After the button type shed film is condensed, the influence on the transmittance is smaller than that of PE shed film. However, after a period of use, the transmittance decreases due to the precipitation of plasticizer and adhesion of dust.

② Good moisture, low thermal conductivity, especially at night, the surface wave radiation transmittance of 6-15m long is very small. The PVC plastic bag is only 20% (the polyethylene shed film exceeds 70%), and the average flow temperature and ground temperature are 1.23 ℃ and 1.05 ℃ respectively higher than that of the polyethylene shed film.

③ The air tightness is good, and the air permeability of nitrogen, oxygen and carbon dioxide are 3.0, 9.0 and 75 (10-14cm3 / mmcm2spa) respectively, but the air permeability of water vapor (6.9103 g / mm24hm2pa) is better than that of LDPE film.

④ High tensile strength, good ductility and strong wind resistance.

⑤ Good weather resistance, general PVC cosmetic bags can be used for more than 1 year.

⑥ Good welding and bonding, easy to splice and repair.

Back