What are the technical difficulties of PVC mold?
PVC mold flip-flops: polyurethane foam flip-flops (also known as microcellular foam plastic flip-flops). It is made of polyurethane foam sole and non-polyurethane foam shoes.
PVC, the key component is polyethylene, in addition to add other ingredients to improve its temperature resistance, ductility, plasticity and so on. The top of this type of film is lacquer, the main component in the middle is polyethylene, and the bottom layer is backcoated adhesive. It is a composite material loved by PVC mold manufacturers in today's society, which is also popular and widely used.
PVC is the basic raw material for PVC mold manufacturers. PVC mold manufacturers add viscosifier, foam glue and other modifiers. After premolding, mixing, drawing, punching. Finally use the die to run into law.
Because the blow check cold drag is based on the PVC raw materials of the new cold drag, its products are very sensitive to the production and processing temperature, the production process is very easy to burn, in addition to the new shoe material in the processing process to add a variety of new chemical plant modifier, so relative to the traditional type of cold drag production regulations and technology content is higher, Grinding tools and processing process processing technology and the standard stipulated by the traditional type of cold drag is very big difference, many manufacturers encountered the following difficulties in the process of processing:
Stretching temperature problem
Raw materials are very easy to fade the color of the coking plant, the production and manufacturing temperature is low, polyurethane foaming is not good, the commodity is too heavy; Production temperature is too high, raw materials are easy to burn and fade, surface foaming.
Telescopic polyurethane foaming problem
Foam hole polyurethane foaming is not symmetrical, loose around the front and back with holes, the middle polyurethane foaming is not good, insufficient bearing capacity.
Telescopic tone problem
The surface tone is not symmetrical, the color bias is more serious around the front and back and right and center, and there are more serious gas marks around the injection hole.
Quality problems of telescopic products
The surface is dull and dull, the malleability is not good, and the wear resistance is not good. High quality, increased cost, no selling points in the sales market.
PVC polyurethane foam sandals soft material, comfortable clothing, can be made into a variety of beautiful and bright sandals, is now on the market production of large sandals, not enough is the manufacturing process is complicated, the actual operation of processing technology is strict, low productivity. More because of its market demand, low productivity.
