Vaccum forming PP plastic clear sheet roll for cup and lids

1.Polypropylene (pp)Vaccum forming PP roll, PP plastic clear sheet roll ,pp roll for cup lid
PP plastic, chemical name: polypropylene
English name: Polypropylene (pp)Vaccum forming PP roll, PP plastic clear sheet roll ,pp roll for cup lid
Specific gravity: 0.9-0.91 g / cm3 Molding shrinkage: 1.0-2.5% Molding temperature: 160-220 ° C
Features of Polypropylene (pp)Vaccum forming PP roll, PP plastic clear sheet roll ,pp roll for cup lid: Non-toxic, odorless, low density, strength stiffness, hardness and heat resistance are better than low pressure polyethylene, can be used at about 100 degrees. Has good electrical properties and high frequency insulation is not affected by humidity, but changes at low temperature Brittle, non-wear-resistant, easy to age. Suitable for making general mechanical parts, corrosion-resistant parts and insulating parts. Common acid and alkali organic solvents have little effect on it and can be used in utensils.
Forming characteristics of Polypropylene (pp)Vaccum forming PP roll, PP plastic clear sheet roll ,pp roll for cup lid:
1.Crystal material, low hygroscopicity, easy to melt rupture, easy to decompose in long-term contact with hot metal.
2.Good fluidity, but the shrinkage range and shrinkage value are large, and it is easy to cause shrinkage. Dent, deformation.
3.The cooling speed is fast, the pouring system and cooling system should slowly dissipate heat, and pay attention to control the molding temperature. The material temperature is easy to be oriented at low temperature and high pressure. When the mold temperature is lower than 50 degrees, the plastic part is not smooth, and it is easy to produce poor welding and flow marks. Warp deformation easily occurs above 90 degrees
4.The plastic wall thickness must be uniform to avoid lack of glue and sharp corners to prevent stress concentration.