The PET folding box is made of PVC sheet. PET is a milky white or light yellow highly crystalline polymer with a smooth and shiny surface. Creep resistance, fatigue resistance, good friction resistance, low wear and high hardness, with maximum toughness in thermoplastics; good electrical insulation, low temperature influence, but poor corona resistance. Non-toxic, weather resistant, chemical resistant
PVC folding box material PVC crisp, poor thermal stability, difficult to process. Can not be used directly, must be modified and mixed, add related additives, PVC generally first modified granulation, prepared into particles, plasticization is more full, processing is also easier, especially the process is injection molding products. Strictly speaking, PVC products with special requirements and PVC modification formulas are tailor-made according to customer requirements.
Pvc folding box material main features:
1. Amorphous materials, low hygroscopicity, poor fluidity, in order to improve mobility, to prevent the occurrence of air bubbles, it is desirable to dry in advance.
2. Extremely easy to decompose, especially in contact with steel and copper at high temperatures, which can be easily decomposed (decomposition temperature 200 degrees). The molding temperature range is small and the material temperature must be strictly controlled.
3. When using a screw-type injection machine and a straight-through nozzle, the hole diameter should be large to prevent dead material.
4 mold casting system should be large, gate section should be large, the mold should be cooled, mold temperature 30-60 degrees, material temperature 160-190.
Pp folding box material main features:
1. The crystallization material has low hygroscopicity and is prone to melt breakage. It can easily decompose when exposed to hot metal for a long time.
2. The fluidity is good, but the shrinkage range and shrinkage value are large, and shrinkage holes, dents, and deformations are likely to occur.
3. Cooling speed, pouring system and cooling system should be slowly cooling, and pay attention to control the molding temperature. Material temperature easy to orientate at low temperature and high pressure, the mold temperature is lower than 50 degrees, the plastic parts are not smooth, easy to produce poor welding, flow marks, More than 90 degrees warp deformation.
4. The wall thickness of the plastic must be uniform to avoid lack of glue and sharp corners to prevent stress concentration.
Shenzhen Xin Hong Yang Packing Co., Ltd., engaged in plastic box customization. Plastic box manufacturer which is better? To find plastic box custom manufacturers, choose Shenzhen Xin Hong Yang Packing Co., Ltd., high-quality transparent plastic box, large output, fast delivery, rapid delivery, quality assurance. Phone: +8613554903780 Fax: +86-755-85207250 E-mail: sales@xhypackaging.com Website: http://www.packaging-box-suppliers.com/