1. Any plastic bottle must first meet the requirements of non-toxicity and no peculiar smell. Due to the wide variety of main raw materials available, it is necessary to select the comprehensive properties of the raw materials. Generally, high-density polyethylene and polypropylene bottles are used for tablets. If transparency is required, polyester bottles (PET bottles) can be selected. If higher barrier properties are required, and light blocking and opacity are required, brown PET bottles are selected. Liquid dosage forms generally use polypropylene bottles or polyester bottles as the main raw materials. At present, the packaging bottles of nutritional health products and food in China are mainly made of PET or HPDE, and the caps are made of PP.
2, the plastic bottle product quality standards. The quality of the product can be judged from the product quality standard of the manufacturer.
3. The tightness of the bottle body and the cover, and the permeability of water vapor. Airtightness and water vapor permeability are two important technical indicators of plastic bottles, which have a crucial impact on the stability of the packaged product.
4, the quality assurance system. Auditing suppliers has become an essential part of purchasing plastic bottles. Through the audit, it is possible to make a comprehensive and correct assessment of the production plant's software and hardware facilities, technical equipment, and comprehensive quality level.
