PET bottle utilization and safe reuse (2)

Safety reuse of PET bottles

Until today, many studies have been able to prove that the contaminants in the packaging will be transferred to food. According to a recent study, the misuse of PET bottles poses a potential health threat to people. Consumer misuse. PET bottles contain strong odor, family chemicals, or insecticides. Toxic substances contained in these compounds are absorbed by the walls of the PET bottle. When these bottles are reused, these harmful substances may be transferred to the newly packaged food if they are not removed in the industrial cleaning process. Therefore, it is necessary to improve the cleaning and disinfection measures for recycled PET bottles. China's safety management regulations for the reuse of PET bottles are still incomplete, because the research standard system in this area has not yet been completed.

With the improvement of the level of science and technology, some of the recycled PET bottles are currently used industrially to refill edible items, and the rest are used to process other items. For example, the PET plastic bottle is pressed into a 400 kg ball, and then the crumbs collected by the washing, trimming, float washing and other procedures are initially made into artificial spine or suede materials, which can then be processed into insoles and roofs. Inner pads, engine insulation panels, carpet anti-slip mats, filter papers, etc., have a wide range of uses.

Overseas use recycled PET bottles for PET packaging. Australia uses recycled PET bottles as the middle layer material for three-layer bottles. Recycled PET is widely used in the production of 3dtex-17dtex staple fibers for non-woven fabrics. The United States also uses recycled PET to produce 6.6dtex-9.9dtex hollow fiber, which is used as a filler material for cotton wool. Recycled PET can also be used for clothing fibers. For example, US Dy-ersburg Fabrics Factory uses 100% recycled PET PET chips for the production of suede; US Wellman Fiber Co., Ltd. develops outdoor fabrics, recycled PET fibers blended with other fibers, and the blending rate can reach 89%. The company also cooperates with other companies to produce medical polyester staple fiber using waste PET beverage bottles as raw materials. The US Patagonia company used recycled PET fiber blended with other fibers to produce sportswear with a blending rate of 80%.

In addition, the use of recycled PET bottles for engineering resins, the use of melt extrusion, solid phase polycondensation to recover PET waste, and the use of PET waste to make modified unsaturated polyester resins, all have a better economy And social benefits. The fiber applications are mainly flax fibers and nonwovens. Wellman's fiber produced from 100% recycled polyester bottles: Fortrel Eco Spun has produced pullovers from Patagonia and has now expanded to manufacture thermal underwear, sleeping bags, pillows, jackets and shoelaces. Other recycled PET and bottle products include carpets, belts, thermoformed clamshell packaging sheets, and films.

These are the best and most valuable for the recycling of PET bottles, and they also avoid the contamination that may occur when packaging other foods.

Conclusion

1. PET bottles are now widely used and save a lot of social resources.

2. The current recycling situation is still quite satisfactory, and polyester bottles that are thrown away everywhere are rarely seen.

3. If recycled PET bottles are used to package foods, they may endanger people’s health without thorough cleaning and disinfection.

4. The recycled polyester bottles have a wide range of applications in the industry, with relatively high economic value and broad prospects for development.

Author/Pan Xingzhen Li Xiaotang Deng Qiaoyun Tang Xiang