The production and consumption of PVC sheets averages 1.4 million tons and is being produced and applied worldwide at a rate of 4%. In recent years, the growth of PVC plastics in Southeast Asia has been particularly significant, thanks to the urgent need for infrastructure construction in Southeast Asian countries. Of the materials that can produce three-dimensional surface films, PVC plastic sheets are the most suitable materials. Specific gravity: 1.38 g/cm 3 , molding shrinkage: 0.6-1.5%, molding temperature: 160-190 ° C.
Features: mechanical properties, excellent electrical properties, strong acid and alkali resistance, good chemical stability, but low softening point. Suitable for making thin plates, wire and cable insulation, seals, etc.
The plastic sheet molding characteristics:
1. Amorphous material, low moisture absorption, poor fluidity. In order to improve fluidity and prevent bubbles, the plastic can be pre-dried. The mold casting system should be short and thick, the gate section should be large, and there should be no dead angle.
The mold must be cooled and the surface is chrome plated.
2. Due to its corrosive and fluid characteristics, it is best to use special equipment and molds. All products must be added with different types and amounts of additives as needed.
3. It is easy to decompose. It is more easily decomposed with steel and copper at 200 °C. It will escape corrosion when decomposed. Irritant gas. The molding temperature range is small.
4. When using the screw injection machine nozzle, the aperture should be large to prevent dead angles. Good without inserts, if there are inserts should be preheated.
PVC boards are everywhere in people's daily lives. PVC can not only express the color of nature, but also express the color of people's fantasy. In Germany, 40% of furniture is made of PVC as surface materials, such as desks, bookshelves, sofas, kitchen cabinets, etc. It is a well-loved, popular and widely used synthetic material in the world today.
