PET bottles and PE bottles have outstanding superior functions, such as: non-toxic, light weight, high transparency, high strength, not fragile, outstanding pressure resistance, outstanding airtightness and relatively stable chemical functions. Therefore, PET bottles and PE bottles The bottle is an aspirational cosmetic packaging container.
1. The layout of PET　　
PET is classified as an organic polymer compound and is composed of three elements: carbon, hydrogen, and oxygen. The molecular layout is as follows: H—[ OCH2CH2—OOC—CO!—OHPET is usually directly esterified by terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (EG). The exchange reaction generates PET monomer, which is then formed by solid-phase polycondensation to form polyethylene terephthalate. The chemical reaction equation is as follows: HOOC——COOH+2HOCH2CH2OH" catalyst base HO—CH2CH2—OOC——COO—CH2CH2OH+2H2O　　
2.The physical function of PET　　
PET is divided into homopolymerization and copolymerization PET according to the polymerization method, and divided into textile PET, bottle-grade PET and sheet-grade PET according to its use.
⒈Density
⒉Average molecular weight
⒊IV value
⒋Melting point
⒌AA content
6. The particle shape is cylindrical or parallelepiped 　　
PET simply absorbs moisture and needs to be stored in a specific warehouse. It must be usefully dried before processing. The difficult-to-handle residue during the production of raw materials and injection molding causes the PET bottles to release acetaldehyde.　　
3.The function of biaxially stretched PET bottle　　
1. With outstanding light transmittance and gloss, the light transmittance is greater than 85%　　
2. Has outstanding mechanical functions and impact resistance; 　　
3. Has outstanding chemical resistance; 　　
4. It has outstanding dimensional stability at room temperature (20~30℃); 　　
5. Light weight; 　　
6. Excellent barrier to gas. Therefore, when purchasing plastic bottle products such as PET bottles and PE bottles, you must place an order according to the purpose of the plastic bottles you use to prevent the pollution of your products due to different functions.