Development and application of the hottest plastic

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Research and development and application of plastic and metal packaging materials

1. metal foil and profile

due to the development of thinning technology, the types of metal foil have greatly increased, and the main varieties are gold foil, copper foil, aluminum foil, stainless steel foil, aluminum foil, titanium foil, copper foil, be foil, PD foil, Ta foil, Ni foil, Ag foil, pH foil, Zn foil, iron foil, Ni Cr and other alloy foils. There are three development directions of metal foil: ultra long, ultra thin and ultra thin; Porous cavitation; Compounding

profiled materials are also developing rapidly, all kinds of profiled materials (such as complex honeycomb) can be produced, and profiled materials are developing in the direction of thin, lightweight and functional. Profiled materials, especially paper honeycomb materials, also have a small number of applications in the field of packaging, and the prospect is promising

2. New plastics and plastic alloys

engineering plastics such as polysulfone, polyphenylene sulfide, polyether ether ester, polyimide and polyarylate have been mainly developed in China, and have good applications. Country 1. Definition of extensometer extensometer is the sensor that senses the deformation of the test piece. Polycarbonate, polyester, polyphenylamine and polyformaldehyde are still the mainstream. Among them, polycarbonate has the fastest development. Engineering plastics mainly study modification and application, alloying technology, composite technology and processing technology. Plastic alloys mainly study interpenetration, graft copolymerization and block copolymerization in alloying technology, molecular composite technology, reactive extrusion, mutual mixing and physical mixing. In foreign countries, PBT and pet alloys have developed rapidly, especially in automotive and automation equipment and electronics. There are mainly PBT/ABS, PBT/PC, PBT/silicone, PBT/PPE, PBT/PET, PBT/alkenyl polymer system alloys. There are also reports abroad that PBT plastic alloy is used to manufacture special high-strength packaging containers, while pet alloy (lcp10%) in the United States has many better properties than pet, and has also been used in packaging

3. Functional polymer materials

the new varieties of functional polymer materials mainly fall into several categories: 1) electrically functional polymers such as conductive materials; 2) Optical functional molecules such as photoconductive materials, gradient refractive index polymers; 3) Chemical functions such as catalytic materials and adsorption materials; 4) Magnetic functions such as magnetic polymer materials; 5) Mechanical functions, such as separation membrane and oxygen rich membrane polymer materials in mass transfer functional materials; 6) Biological functions, such as biomedical polymer materials, biodegradable materials (heat shrinkable films), heat-resistant polymer materials, heat sensitive color changing materials; 7) Intelligent polymer materials (such as polypyrrole, polyphene, polyaniline), etc

4. Organosilicon and fluorine materials

silicon polymer materials are new materials in the 21st century. At present, on the basis of molecular design and molecular structure control, synthetic reactions such as defluorination condensation and hydrogenated silane methylation polymerization are discussed, molecular diversified functional materials are developed, and optoelectronic functional materials for high-end composite membrane equipment are developed. Organosilicon is a kind of ecomaterials with excellent performance, which is mainly used in aerospace, automotive, construction, bioengineering and other high-tech fields. The goal of the next stage is to improve the molecular design and measure the 1-point synthesis technology in the center of all samples, so as to realize the optimization of organosilicon functionalization, polymer synthesis and material preparation technology

fluorine series materials have made good progress in the application of packaging. For example, the high strength, functionalization and stability of PTFE, the thermal stability of pea and the functional film of PVDF. In addition, fluoropolymers with good piezoelectricity, antistatic, radiation resistance and wear resistance have also come out

5. Special fibers

there are many kinds of modern fibers. Fibers with different chemical structures greatly affect the strength of synthetic fibers. In order to enhance or improve the strength and function of fibers, surface modification, corona, electroplating, vacuum coating and so on have been carried out on fibers. The strength of super strong fibers can be greatly improved by using the radiation treatment process. The super strong tire is pulled out of the oil supply plastic hose with the synthetic cover plate removed and filled with fiber with a bucket. A variety of processes have been studied. There are also a variety of processes for Kevlar fiber without latex or rubber paste. High functional fiber materials such as all aromatic polyester, high polymerization degree PE, fluorine series, POM, etc. are also gradually applied in special synthetic fibers. Conductive fiber and magnetic fiber composite plastic (film) are also widely used, mainly in anti-static, anti electromagnetic and other sensitive packaging containers and packaging materials

6. special rubber and sealing and damping materials

special rubber is mainly NBR, nhbr, co/eco and ACM, and the production level in Japan is the best. Among them, NBR has good performance and wide application, with more than 300 specifications and varieties, and NBR with new functions is constantly coming out. Nhbr has good comprehensive performance and is developing towards high strength. EC/eco has excellent heat resistance, aging resistance and ozone resistance. ACM is strengthening oil resistance and cold resistance

fully meet the temperature control indicators specified in the national standard gb/t229-2007 (American Standard ASTM) "metal Charpy Notch Impact Test Method". 7. Liquid crystal display materials

at present, LCD liquid crystal materials are mainly small molecular nematic liquid crystals and new macromolecular polymer side chain liquid crystals. The development of new liquid crystal polymers has made great progress in the following aspects. First, its electro-optic effect research. Its polymer materials with low Vth have studied cyano biphenyl small molecule liquid crystals with strong polarity, and side chain liquid crystal polymers with cyano, nitro, fluorochlorine terminal groups; Second, research on new display materials. The new varieties that have been developed now include laser beam heat addressable nematic liquid crystal polymers and smectic side chain liquid crystal polymers, heating electrode addressable cholesteric polysiloxane (ch---lcp) display materials, guest host effect color display materials of side base liquid crystal polymers containing dye genes, and so on. (to be continued)

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