What is the difference between PE rattan and PVC rattan?
A: PE, Chemical Name: Polyethylene, English Name: Polyethylene (referred to as PE) Specific Gravity: 0.94-0.96 g/cm3 Molding shrinkage: 1.5-3.6% Molding temperature: 140-220°C.
Features: Corrosion resistance, electrical insulation ( Especially excellent in high-frequency insulation, it can be chlorinated, chemically cross-linked, radiation cross-linked modified, and can be reinforced by glass fiber. Low-pressure polyethylene has higher melting point, rigidity, hardness and strength, less water absorption, and good electricity Performance and radiation resistance; high-pressure polyethylene, flexibility, elongation, impact strength and permeability; ultra-high molecular weight polyethylene high impact strength, fatigue resistance, wear resistance. Low pressure polyethylene suitable for making corrosion-resistant parts and Insulation parts; high-pressure polyethylene suitable for the production of films; ultra-high molecular weight polyethylene suitable for shock absorption, wear and transmission parts.
Molding characteristics: 1. Crystal material, moisture absorption, do not have to fully dry, excellent fluidity, liquidity is sensitive to pressure, high pressure injection molding should be used, the material temperature is uniform, the filling speed is fast, full pressure is maintained. Direct gate should not be used , To prevent uneven shrinkage, internal stress increases. Note that the location of the gate to prevent shrinkage and deformation. 2. Shrinkage range and shrinkage, obvious direction, easy deformation warping. Cooling speed should be slow, mold design Cold material points, and a cooling system. 3. The heating time should not be too long, otherwise it will decompose. 4. Soft plastic parts with shallow side grooves, you can force demoulding. 5. Melt may occur, Should not be in contact with organic solvents to prevent cracking
PVC, Chemical name: PVC, English name: Poly (Vinyl Chloride) Specific gravity: 1.38 g/cm3 Molding shrinkage: 0.6-1.5% Molding temperature: 160-190°C Features: Mechanical properties, excellent electrical properties, acid and alkali resistance Extremely strong, good chemical stability, but low softening point. Suitable for the production of thin plates, wire and cable insulation, seals, etc. Molding characteristics: 1. Amorphous materials, moisture absorption, poor fluidity. In order to improve mobility, to prevent the occurrence of air bubbles Plastics can be pre-dried. Mold casting system should be thick and short, gate cross-section should be large, there must be no dead ends. The mold must be cooled, the surface is chrome plated. 2. Due to its corrosive and sex and fluidity characteristics, it is best to use special equipment and molds. . All products must be added with different types and quantities of additives as required. 3. Extremely easy to decompose, contact with steel and copper at 200 degree temperature is more easily decomposed, and corrosion is generated when decomposing. Irritating gas. Molding temperature range is small. 4. When the screw injection machine nozzle is used, the hole diameter should be large to prevent Dead angles and stagnant material. Well without inserts, if inserts should be preheated.
PVC itself is non-toxic but in the production process need add excipients, excipients is toxic. PE does not need add excipients in the production process, so compared to PVC, PE is non-toxic.