Brief introduction to the raw materials used in the pro […]
Brief introduction to the raw materials used in the production of cosmetic containers
Plastic bottles are usually made of PP, PE, K, AS, ABS, acrylic, PET, etc. Commonly used for cosmetic containers, thicker cream bottles, caps, stoppers, gaskets, pump heads, dust covers for injection molding; PET bottles for two-step molding, tube blanks for injection molding, finished packaging for blowing bottle. Other emulsion bottles such as thinner containers and washing bottles are blown bottles.
ABS belongs to engineering plastics, is not environmentally friendly, has high hardness, and cannot be directly contacted with cosmetics and food. In acrylic cosmetic packaging materials, it is generally the material of inner cover and shoulder cover. The color is yellow or milky white.
PP and PE are environmentally friendly materials, which can be directly contacted with cosmetics and food. They are the main material for filling organic skin care products. The material is white and translucent. According to different molecular structures, three different degrees of softness and hardness can be achieved.
PET is an environmentally friendly material that can be directly contacted with cosmetics and food. It is the main material for filling organic skin care products. PET is soft and the color is transparent.
PCTA and PETG are environmentally friendly materials, which can be directly contacted with cosmetics and food. They are the main material for filling organic skin care products. The material is soft and transparent. PCTA and PETG are soft and easy to scratch. And it is not commonly used for multi-purpose printing.
AS hardness is not high, brittle (clear sound when knocking), transparent color, and the bottom color is blue, it can directly contact with cosmetics and food. In ordinary lotion bottles, vacuum bottles are generally the material of the bottle body. A small-capacity cream bottle can also be made. Presented transparent.
Acrylic material is hard, transparent, and the base color is white. And Acrylic often sprays in the outer bottle in order to maintain a transparent texture, or paints it during injection molding.
The PETG injection molding process is relatively stable, and does not require a specially designed injection molding machine. The injection temperature is only about 215 ° C ~ 235 ° C, and the PC injection molding process is not easy to control, the injection temperature is as high as 280 ° C, compared to they can Better save power. PETG is not prone to internal stresses during injection molding, which is determined by their molecular structure and their excellent ductility. PC is more prone to internal stress, and it is necessary to eliminate the internal stress post-processing procedure. The internal stress of injection molded products is very harmful, and the serious situation is stress cracking, which will increase unnecessary complaints or claims from customers.