PBT ABS PET PVC PP PE These plastics are compared

pbt: density 1.3, processing temperature 240-260 degrees, mold temperature 60-80, shrinkage rate 1.5-2.5, melting point 220-230 degrees. Advantages: mechanical properties stable tensile strength and tensile modulus and nylon are similar, all are relatively Excellent. Small coefficient of friction and self-lubrication. Low water absorption. Excellent electrical properties. Good dimensional stability. Chemical resistance and oil resistance. ) is 60 degrees. The impact strength is poor, and it is generally used with glass fiber assisted by pbt and gf. Abs: density 1.06, processing temperature 210-275, mold temperature 50-90, shrinkage rate 0.4-0.7, melting point 175 degrees, generally Ratio a:b:c=20:30:50. Advantages: hard, easy to extrude, easy to dye, flame retardant, impact resistance, good surface. Disadvantages: poor solvent resistance, low dielectric strength, low elongation. pet: density 1.37, processing temperature 260-290, mold temperature 140, shrinkage 1.2-2.0, melting point 245-260 degrees. Advantages: good dimensional stability, excellent mechanical properties, good electrical properties, good weather resistance, organic solvent resistance, Oil and weak acid. Good gas resistance and water resistance. Self-extinguishing. Disadvantages: mechanical properties have directionality, high fluidity, slow crystallization speed, strict drying and processing conditions. pvc: density 1.38, processing temperature 180 -200 degrees, mold temperature 30-50, shrinkage rate 0.5. Vicat softening point is 70 degrees. Advantages: good dimensional stability, low cost, good weather resistance, adding different proportions of plasticizers can easily adjust the hardness. Disadvantages : Poor chemical resistance and temperature resistance. Hydrogen chloride will be generated after thermal decomposition. pp: density 0.915, processing temperature 250-270, mold temperature 50-75, shrinkage rate 1.0-2.5 Advantages: easy to dye, moisture resistance, chemical, impact resistance, high Hinge characteristics. Disadvantages: complex special-shaped extrusion is not easy, easy to oxidize, not easy to combine, easy to be decomposed by ultraviolet light. pe: density 0.954 (low density), 0.92 (high density). Processing temperature 160-260 (low density) 260-300 ( High density) mold temperature 50-70 (all possible). Shrinkage rate 1.5-5.0 (low density) 1.5-3.0 (high density). Advantages: soft, non-toxic and easy to dye, impact resistance (-40 degrees -90 degrees) moisture resistance Good chemical properties. Disadvantages: not easy to extrude, high thermal expansion coefficient, not easy to fit, poor temperature resistance.