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    Hello, welcome to the official website of Fujian Qinwei Photoelectric Co., Ltd.!
    News
    About carrier tape raw materials

    Carrier tape production materials: PS, ABS, PET, PC, HIPS, PE and other plastic materials, special requirements can be made of metal

    PC material: Polycarbonate, abbreviated as PC, is a colorless and transparent amorphous thermoplastic material. Its name comes from its internal CO3 group.


    Chemical properties:

    Polycarbonate is resistant to weak acids and neutral oils. Polycarbonate is not resistant to ultraviolet light and strong alkalis.


    Physical properties:

    Specific gravity: 1.18-1.20 g / cm3 Molding shrinkage: 0.5-0.8% Molding temperature: 230-320 ° C Drying condition: 110-120 ° C 8 hours Can be used for a long time at -60 ~ 120 ° C. Material properties: high impact strength, good dimensional stability, colorless and transparent, good colorability, good electrical insulation, corrosion resistance, abrasion resistance, but poor self-lubricity, tendency to stress cracking, easy hydrolysis at high temperature, and other resin Poor solubility. Suitable for making small instrument parts, insulating transparent parts and impact resistant parts


    Material properties

    1. Amorphous material, good thermal stability, wide molding temperature range, and poor fluidity. Hygroscopic, but sensitive to water, must be dried. The molding shrinkage is small, and melt cracking and stress concentration are easy to occur. Therefore, the molding conditions should be strictly controlled. The plastic parts must be annealed.

    2. Plastic parts with high melting temperature and high viscosity, more than 200g, should use heated extension nozzles.

    3. Poor plastic fluidity, the mold pouring system is based on the principle of thick and short, cold material wells should be set, the gate should be large, and the mold should be heated.

    4. If the material temperature is too low, it will cause lack of material, the plastic parts are dull, if the material temperature is too high, it will easily overflow, and the plastic parts will foam. When the mold temperature is low, the shrinkage is small, the elongation is small, the impact strength is low, and the bending, compression and tensile strength are low. When the mold temperature exceeds 120 degrees, the plastic part cools down slowly and is easy to deform.

    5. The plastic wall is not suitable for being too thick. It should be uniform to avoid sharp corners and gaps.


    Material properties

    ① High strength, tensile strength of 69MPa and flexural strength of 96MPa.

    ② High temperature resistance, long-term use can withstand temperature environment of 130 degrees Celsius.

    ② Good transparency and non-toxic.

    ④ The color matching and surface coating of raw materials are not as good as ABs.

    ⑤ Pc should choose high fluidity grade. Suitable for clamshell machines and mobile phones used in harsh environments.


    The disadvantage of PC is its poor abrasion resistance. Some polycarbonate devices for wear-resistant applications require special treatment of the surface.

    PS refers to Polystyrene, a thermoplastic synthetic resin, and its application area is the electronics / electrical industry ... ……

    PS: It belongs to polystyrene, commonly known as hard rubber. The scientific name in Chinese is general user polystyrene, and the English name is General Purpose Polystyrene. In the plastics industry, it is abbreviated as PS. Specific gravity: 1.05 g / cm3. Mold shrinkage: 0.6-0.8%.


    Material properties

    Excellent electrical insulation (especially high-frequency insulation), colorless and transparent, light transmittance second only to plexiglass, coloring and water resistance, good chemical stability, average strength, but brittle, easy to cause stress brittle cracking, not resistant Organic solvents such as benzene, gasoline, etc. Suitable for making insulating transparent parts, decorative parts and chemical instruments, optical instruments and other parts.


    Formability

    1.Amorphous material, small moisture absorption, do not need to be fully dried, not easy to decompose, but large thermal expansion coefficient, easy to produce internal stress. Good fluidity, can be formed by screw or plunger injection machine

    2. High material temperature, high mold temperature and low injection pressure should be used. Prolonging the injection time is beneficial to reduce internal stress and prevent shrinkage. Deformation.

    3.Various types of gates can be used, and the gates are connected with the arc of the plastic parts to avoid damaging the plastic parts when the gates are removed. The demolding angle is large and the ejection is uniform. If there are inserts, they should be preheated.


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