Author: mgg-Plastic bottle manufacturer
(1) Dry and preheating of PET raw materials: The drying temperature is about 170 ° C, drying time 4h ~ 5h, otherwise affecting the ability and transparency. (2) Injection molding (cartridge temperature, injection pressure) - The temperature of the barrel is about 280 ° C, it is not easy to exceed 285 ° C, otherwise it is easy to produce acetaldehyde, maintaining pressure at 0.4 to 0.5 MPa, preparation highlights Transparency; the bottle cooling should be fast, otherwise it will affect transparency. (3) Bottle blank temperature regulation: temperature requirements 95 ° C, the orientation temperature is too low, the bottle stress is white, and the temperature is too high.
(4) Tensile blow molding: suitable mold, control stretching ratio, control blowing amount, pressure time, and exhaust gas before opening.