Pet plastic bottle production process is introduced

The rheological properties of pet plastic bottles in the molten state, stress on the influence of the viscosity is bigger than the temperature, therefore, mainly from the pressure to change the activity of the melt. The use of plastic bottles in different environments have different status, so under the molten state of plastic bottles for effective control of rheology and viscosity. 1, plastic processing for pet plastic bottle macromolecule containing aliphatic, has certain hydrophilicity and granular materials at high temperature is more sensitive to water, when the moisture content is more than the limit, in the processing of pet plastic bottle molecular weight drops, products with color, crisp. Therefore, necessary to dry the material before processing, the drying temperature is 150 ℃, more than 4 hours, generally is 170 ℃, 3 - 4 hours. Available air-launched method of repair material is completely dry. Materials used for raw material must be dry, pay attention to different drying temperature and time limits, ensure produce plastic bottle has a good function of the product. 2, selection of injection molding machine pet plastic bottles because not disorderly of short time, after melting point and melting point is high, so need more temperature control section and plasticizing the friction heat generating less injection system, and the products ( Water cut materials) Actual weight can not less than two-thirds of machine injection quantity. 3 do not use a long residence time, retention time, in order to prevent the molecular weight decreased. As far as possible avoid temperature above 300 ℃. If the downtime is less than 15 minutes. Just make air-launched processing; If more than 15 minutes, then use PE clean, viscosity and the barrel temperature drop to PE, until it is. When the residence time of plastic bottles must carry on the strict control, need to undertake the processing of different in different temperature, to strictly grasp the time limit. 4, pay attention to matters to recycle material cannot too big, otherwise easy to produce the next where the 'bridge' influence and plasticizing, in plastic recycling, strictly control the number of the recycled material, ensure the quality of plastic plasticizing. If the mould temperature control is bad or improper material temperature control, easy to produce 'white mist and opaque. To calibrate mould strict control, otherwise you will don't want to see on the event, die temperature is low and the average, cooling speed, transparent crystal is less products. 5, mould and pet plastic bottle embryo gate design general use molding mould of hot flow path, between the mold and injection molding machine template must have the best insulation board, its thickness is about 12 mm, and heat insulation board must be able to bear high pressure. Exhaust must be sufficient to avoid local overheating or on the fracture, but its vent depth generally not more than 0. 3 mm, otherwise easy generation flash. Pet plastic yield process requires strict quality system maintenance, ensure production of plastic bottles with good product quality and guarantee. Production process is complicated, need different production process strictly control, to ensure that each process strictly according to the scale. Dongguan city cheung plastic products company in the 【 4008000286 】 , 10 years focused on custom plastic container manufacturer, specialized in HDPE bottle, PP bottle, PET, PS bottle, acrylic bottle and plastic bottle caps, is widely used in health care products, food, cosmetics, medicine packing more about product details in xiang in the website: http://www. dgxianglin。 com/product5。 HTML MORE + recommended product bottle PET health products bottle PET health products bottle PET health products bottle PET care bottle PET health products bottle PET health products bottle PET health products square bottle PET health products plastic PET health products bottle PET health products bottle PET health products bottle PET health products' Bowling bottle 】 PET health products bottles [ New arrival] Pet health products bottles 【 Preview 】 Acrylic health food bottle PS supplement bottle PS health food bottles of special tear cover cover