1. PE introduction
Chemical Name: Polyethylene English Name: Polyethylene Specific Gravity: 0.94-0.96 g / cc Molding Shrinkage: 1.5-3.6%
Molding temperature: 140-220 ℃
2. Features:
Corrosion resistance, electrical insulation (especially high-frequency insulation) is excellent, can be chlorinated, chemical crosslinking, radiation crosslinking modified glass fiber can be used to enhance the low pressure polyethylene melting point, rigidity, high hardness and strength, Low water absorption, good electrical properties and radiation resistance; high pressure polyethylene flexibility, elongation, impact strength and permeability better; ultra-high molecular weight polyethylene high impact strength, fatigue resistance, wear resistance. Ethylene suitable for the production of corrosion-resistant parts and insulation parts;
3. Molding characteristics:
1. Crystallization material, moisture absorption is small, do not have to fully dry, excellent fluidity Flow-sensitive to pressure, high pressure injection molding should be used, the material temperature uniformity, filling speed, packing pressure. Should not use direct gate to prevent shrinkage Uneven, the internal stress increases.Pay attention to choose the gate position, to prevent shrinkage and deformation.
2. Shrinkage range and shrinkage value is large, obvious direction, easy deformation warping.Cooling speed should be slow, the mold is set cold material hole, and a cooling system.
3. Heating time should not be too long, otherwise it will decompose.
4. Soft plastic parts have a shallow groove side, you can force stripping.
5. Melting may occur, should not be exposed to organic solvents to prevent cracking.