Pet Preform Bottle Containers Suppliers

black spots black spots are mainly foreign impurities (dust) and sliced ??plasticization caused by some high-temperature carbonization. If it is caused by foreign impurities (dust), will have to take management measures to avoid, such as slice production, packaging, storage (including injection molding plant), transport and other links. Diesel forklift is the most prone to black and gray, therefore, whether it is sliced ??manufacturers or slices the use of manufacturers, including transport links, to avoid the use of diesel forklift. If it is plasticized part of the high temperature carbonation caused by the barrel and the mold should check whether the temperature is set too high, if the inspection found that the temperature is normal but the preform is still local carbonization phenomenon, you should check the barrel, hot runner and mold interior There is no dirt pollution, it is necessary to disassemble and clean. Color value The value of the bottle slice is generally expressed as L / a / b, the L value is the brightness, the b value represents the yellow / blue index, and the a value represents the red / green index. L value of the general requirements of the higher the better, so that the color of the product more natural, people feel comfortable. The most important value of the color index is b value, b value is negative blue, positive yellow. Injection of slices to withstand high temperature melting, b value to increase, that is, the color of the product than the slices of yellow, so the bottle b value to be slightly lower a little better to ensure that the color of the product is not yellow is better.

The catalyst content generally does not provide catalyst content in the vials plant specifications, as this involves product formulations and processes. In fact the domestic bottle manufacturers choose the type of catalyst similar, but the amount of additions vary due to different technology, basically antimony trioxide, antimony triacetate, ethylene glycol antimony and other antimony catalyst, with germanium, titanium And other new catalyst is very small, mainly price factors. The catalyst promotes the growth of the molecular chain during the polymerization and thickening reactions, but also promotes degradation during injection molding. Therefore, for bottles with high catalyst content, the injection temperature should be appropriately lower to ensure that the final product quality is controlled. ● Stabilizer content In order to prevent the bottle in the injection of high temperature due to thermal degradation, the bottle in the production process by adding a certain amount of heat stabilizer. Each bottle manufacturer uses the stabilizer model and the amount of addition is not the same. In theory, the high temperature of the thermosetting agent can be appropriately higher, but the heat stabilizer itself is an impurity for PET, which causes the preform to fog. Therefore, the stabilizer content should be moderate, otherwise, although the high stability of the bottle can improve its thermal stability and improve efficiency, but the quality of products will decline. However, with the development of the bottle, many bottle manufacturers have a hundred grain weight as a quality index of the bottle, because the bottle level slice particle size not only affect the solid Phase viscosity, but also on the injection process also has an impact. The general extrusion screw is divided into feed, melt plasticized, mixed three sections, extruder screw structure parameters in a compression ratio  Plastic Bottle Cap Suppliers, Custom Made Plastic Bottles,  www.plastic-bottle-manufacturers.com