The choice of green packaging materials

The choice of packaging materials is first to meet the requirements of green packaging materials, and secondly to consider the working environment of packaging materials. It includes functional, structural requirements, safety, wear resistance, and working environment (impact, temperature and humidity, etc.) and other aspects.
1. Polymeric smart packaging materials Research on this area in MIT and Hokkaido University of Japan is systematic and in-depth. In fact, we refer to this material as a package for the purpose of using it both as a package and as part of the product's construction to make it a protective layer. Especially on some very delicate and easily corroded rust-prone components.
This smart material has a gel structure. Temperature-sensitive gels, superabsorbent gels, memoryless gels, and molecular recognition gels. This material has been used extensively in agriculture and medicine. The use of hydrogels and other composite materials as packaging materials can keep fruits and vegetables in a moist environment, just as fresh as just picked.
2. Degradable Polymer Materials Such packaging is mainly used in the pharmaceutical, health, and beverage industries. The current capsules are mainly packaged in plastic and paper. If we use recycled glass and degradable polymer materials, we can reduce the harm to the environment and achieve the purpose of sanitation. Biodegradable materials have the function of being absorbed by animals and human bodies. Such packaging materials in foreign countries mainly include polyester amide copolymers, polyglyceryl polyacrylate polyesters, polylactic acid and its copolymers and other polymer materials. .
Degradable plastics have been widely used in food packaging, tool packaging and external packaging boxes for some mechanical products. The biodegradable plastic packaging material not only has the functions and characteristics of traditional plastics, but also can be divided and degraded in the natural environment through the action of microorganisms of soil and water or the action of ultraviolet rays in sunlight after the service life is completed, and finally be restored in a reduced form. Enter the ecological environment and return to nature. It is divided into biodegradable plastics, biocleavable plastics, and photodegradable plastics.
3. Including sterilizing and absorbing dual-function packaging materials China is a large agricultural country with high cotton output, and it is mainly used in the clothing industry such as cold protection and heat preservation. Others can also be applied to some industries that require higher packaging industry and require lower bacterial indicators, such as medicines, foods and other packaging.
Using cotton as a raw material, cotton fibers can be obtained. By grafting the synthesized epoxy-based long-chain quaternary ammonium salt onto the cotton fiber, a cotton fiber having both a bactericidal and a metal ion-bifunctional functional group can be produced.
Production plan (laboratory production method): Weigh 5g of absorbent cotton, soak it in water for 0.5H, dry it by pressure, put it into a shaking reactor, add 100g of 30% NAOH solution, react at room temperature for 1H, remove by pressure, and put it into the shaking reactor. Adding 100g of 8% NAOH and 10ml of epichlorohydrin, reacting 10H at 20°C, pressing dry, washing with water, acetone, drying at a temperature of 60-70°C, and obtaining an epoxy-based cotton fiber.
Experiments show that this type of cotton fiber can completely kill E. coli and Staphylococcus aureus within 50 miN, and the long-chain quaternary ammonium salt is grafted onto the cotton fiber, which still has a rapid and powerful sterilizing ability. If this kind of material is used on pharmaceutical packaging, it has the advantages of being edible, non-polluting, and so on, while at the same time accelerating the development of agriculture, improving China's economic strength and comprehensive national strength, and helping to narrow the gap between rural and urban areas.
4. Glass packaging material Glass still occupies a large proportion in the packaging industry, and its nature determines it is easily broken. For some devices more sophisticated, there is a need for insulated, dry equipment to withstand the effects of the external environment.
The study of glass is an old discipline with strengthened glass and colored glass. After many years of practice, scientists believe that a SF chemical as a curing agent, enhancer, the effect is very good, on the basis of strengthening, we will consider its anti-corrosion, rust, insulation and other properties. The epoxy glass steel lining precisely has these good features. If we reform and design the original method of glass making and reduce its harmful effects, we will make a difference in our surrounding environment and living space and let you live in a non-toxic, radiation-free comfortable space.
Epoxy glass steel anti-corrosion lining technology has been vigorously promoted, not only simple and practical, but also to improve its anti-corrosion effect, can extend the life of the package and achieve higher packaging value.