Plastic bottle embryo is the initial form of plastic bottle. It takes a lot of steps to process it into a complete material. Raw materials should be selected before making. The raw materials include polyethylene, polyamide, polyoxymethylene, etc. When you buy, you should also pay attention to your own requirements. Next, the company will introduce the selection of raw materials for plastic bottle embryo and the precautions when purchasing.
1. Polyethylene
The abbreviation of polyethylene is "PE". High pressure polyethylene has low crystallinity, low density and soft texture. Compared with low pressure polyethylene, it has higher transparency, better impact resistance and low temperature resistance, but it is not heat resistant. The permeability of LDPE is better than that of hPPE, but its impact resistance is not as good as that of hPPE. Both kinds of polyethylene are easy to crack under stress.
2. Polyamide
Polyamide is abbreviated as "pa". There are many kinds of polyamides. The chemical structure and properties of polyamides are different with different synthesis methods. But they have some similarities and properties.
Polyamide has high crystallinity, high mechanical strength, good toughness and good fatigue resistance. The plastic bottle embryo made of polyamide is easy to dye and shape, and can be used for a long time at room temperature. However, the thermal deformation temperature is low, the hygroscopicity is large, and the dimensional stability is poor.
POM 3
Polyoxymethylene (POM) is a kind of high crystallinity material. Polyoxymethylene is a kind of elastic material. It has strong chemical stability, impact resistance and creep resistance, and has high stiffness, strength and wear resistance. It's a common material. However, polyoxymethylene has high shrinkage, high dimensional control technology and relatively low corrosion resistance.
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