1. The Pet Bottle Preform is selected from the main material and additive formula, which plays a vital role in the quality of the bottom. There are many types of main materials in the selection. This requires us to investigate the inductive function when selecting. Usually, the tablets are made of high-density polyethylene and polypropylene bottles. If the transparency is required, PET bottles can be used. High, and block light, opaque, use a brown PET bottle, the isolation function is better for PEN bottles.

2, sealing, permeability: sealing and water vapor permeability are two important skill indicators of pet bottles, they play an important role in the stability of pet bottles.

3, stability and compatibility: the use of pet bottles, especially the selection of new pet bottles (or new materials, new processes) probably lead the experiment to investigate the stability and compatibility of pet bottles. The soaking, dissolution, adsorption, chemical reaction and denaturation of the products and pet bottles are necessary to be determined by scientific testing.

4, product quality and assurance system: pet bottle manufacturers probably have the corresponding national and industry standards. Together, we must make a correct evaluation of the manufacturer's software and hardware equipment, skills and equipment, and quality inductive levels.

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