The Purpose And Material Features Of PVC

PVC can be divided into hard PVC and soft PVC. Among them, hard PVC accounts for about 2/3 of the market, and soft PVC accounts for 1/3. Commonly used in soft PVC floor, ceiling, and the surface of leather, but because of the soft PVC contains softening agent (which is the difference between the soft PVC and hard PVC), easy to brittle, not easy to save, so its use range was limited. Hard PVC does not contain softener, so it is flexible, easy to shape, not brittle, non-toxic and pollution-free, and has a long shelf life. Therefore, it has great development and application value. PVC is hereinafter referred to as PVC. Soft PVC is mainly used to make vacuum plastic absorbing film, which is used for surface packaging of all kinds of panels, so it is also called decorative film and adhesive film, which is used in many industries such as building materials, packaging and medicine. Among them, building materials industry accounts for the largest proportion, which is 60%, followed by packaging industry, and other small range of application industries. Features: good mechanical performance, good electrical performance, strong acid and alkali resistance, good chemical stability, but low softening point.

Molding characteristics:

1. Amorphous material, moisture absorption, liquidity is poor. In order to improve the liquidity, prevent bubbles and plastic can be dry. In advance of mould gating system should be short, the appropriate gate section is big, can not have a corner. Mold cooling, surface plating chromium;

2. Due to its corrosive and fluidity characteristics, it is best to use special equipment and mold. All products shall be supplied with different types and quantities of additives as required;

3. Easy to decompose, with steel at 200c temperature. Copper contact is easy to decompose, and corrosion occurs when decomposing.

4. When using screw injector nozzles, the aperture should be large to prevent dead Angle retardation. Do not wear inserts, if there are inserts should be preheated.

PVC (polyvinyl chloride) is a kind of flame retardant, chemical stability is good, only produces the low tensile crack internal force material. At the same time, its material characteristics also include high strength, high rigidity and high hardness. The working temperature ranges from -15c to -60c.

Main features of PVC: strong corrosion resistance: the most suitable corrosion resistance equipment in the chemical industry. Easy processing: easy cutting, welding and bending. High strength, high stiffness and high hardness; Good electrical insulation; Good chemical stability; Self-extinguishing; Low water absorption; Easy to stick, easy to paint. The price is low.

PVC applications: acid test manufacturing tower, the water enrichment tank, print processing equipment, plating bath, battery box, meter board, sound seat cover, the radio blank, all kinds of electrical insulation board, cement tank lining, machine wind deflector, exhaust airway engineering project, stationery, building materials, etc.