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Brief introduction of the commonly used materials in the production of cosmetic containers(/)
Plastic bottles are usually made of PP, PE, K material, AS, ABS, acrylic, PET, etc. Usually used for cream bottles, caps, stoppers, gaskets, pump heads, and dust covers with thicker walls of cosmetic containers are injection molded; PET blow molding is two-step molding, tube embryo is injection molding, and the finished packaging is blow molding . Others, such as lotion bottles and washing bottles with thin container walls, are blown bottles.
ABS belongs to engineering plastics, which is not environmentally friendly, has high hardness, and cannot be directly contacted with cosmetics and food. In acrylic cosmetic container packaging materials, it is generally the material of inner cover and shoulder sleeve. The color is yellow or milky white.
PP and PE are environmentally friendly materials that can be directly contacted with cosmetics and food. They are the main materials for filling organic skin care products. The materials are whitish and translucent. According to different molecular structures, three different degrees of hardness and softness can be achieved.
PET is an environmentally friendly material that can be directly in contact with cosmetic containers and food. It is the main material for filling organic skin care products. PET is soft and transparent in nature.
PCTA and PETG are environmentally friendly materials that can be directly contacted with cosmetics and food. They are the main materials for filling organic skin care products. The materials are soft and transparent. PCTA and PETG are soft and easy to scratch, and they are not often used for printing and printing. .
AS is not high in hardness, relatively brittle (a crisp sound when tapped), transparent color, and the background color is blue, which can directly contact with cosmetics and food. In ordinary lotion bottles and airless bottles, they are generally the material of the bottle body. Small-capacity cream bottles can also be made. It is transparent.
The acrylic material is hard, transparent, and has a whitish background. In order to maintain a transparent texture, acrylic is often sprayed inside the outer bottle or painted during injection.
The PETG injection molding process is relatively stable and does not require a specially designed injection molding machine. Its injection temperature is only about 215℃~235℃, while the PC injection molding process is not easy to control. The injection temperature is as high as 280℃. In contrast, they can Better save power. PETG is not prone to internal stress during injection molding, which is determined by their molecular structure and its excellent ductility. PC is more prone to internal stress, and one more post-processing program to eliminate internal stress. The internal stress of injection molded products is very harmful, and the serious one is stress cracking, which will increase unnecessary complaints or claims from customers.