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The development of profile materials is also very rapid, and all kinds of special-shaped (such as complex honeycomb type) materials can be produced, and the profiles are becoming thinner, lighter, and more functional. Profiles, especially paper honeycombs, have a small amount of application in the packaging field and they are promising.
2. New plastics and plastic alloys are mainly used in China to develop engineering plastics such as polysulfone, polyphenylene sulfide, polyether ether esters, polyimides, and polyarylates. Foreign polycarbonates, polyesters, polyphenols, and polyoxymethylene still dominate the market. Among them, polycarbonate has developed the fastest. Engineering plastics mainly studies modification and application, alloying technology, compounding technology and processing technology. Plastic alloys mainly study the interpenetrating network, graft copolymerization and block copolymerization, molecular compounding technology, reactive extrusion, mutual blending and physical mixing in the alloying technology. In foreign countries, PBT and PET alloys develop 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 systems. In foreign countries, PBT plastic alloys have also been used to make special high-strength packaging containers. In the United States, PET alloys (LCP10%) outperform many PETs and are used in packaging.
3. Functional polymer materials New varieties of functional polymer materials mainly include: 1) electrically functional polymers such as conductive materials; 2) optical functional molecules such as photoconductive materials and gradient refractive index polymers; 3) chemical functions such as catalysis Materials, adsorbent materials; 4) magnetic functions such as magnetic polymer materials; 5) mechanical functions such as separation membranes, oxygen-rich membrane polymer materials in mass transfer function materials; 6) biological functions such as biomedical polymer materials, biodegradable materials (Heat shrinkable film), heat-resistant polymer material, thermochromic material; 7) Smart polymer materials (such as polypyrrole, polyphenanthrene, polyaniline) and so on.
4. Silicone and fluorine-based materials Silicon-based polymer materials are new materials in the 21st century. At present, on the basis of molecular design and molecular structure control, synthesis reactions such as defluorination condensation and hydride silylation methylation polymerization are discussed, molecularly diversified functional materials are developed, and photoelectron functional materials of high-grade composite membrane equipment are developed. Silicone is an eco-material with excellent performance. It is mainly used in aerospace, automotive, construction, bio-engineering, and other high-tech fields. The next stage goal is to improve molecular design and synthesis techniques and to optimize the functionalization of silicone, polymer synthesis, and material preparation techniques.
Good progress has been made in the application of fluorine-based materials in packaging. For example: high strength, functionalization, high stability of PTFE, thermal stability of PEA, functional film of PVDF. In addition, piezoelectric polymers, antistatic properties, radiation resistance, and abrasion resistance are also available.
5. There are many kinds of special fiber modern fibers. Fibers with different chemical structures affect the strength of synthetic fibers to a large extent. In order to enhance or improve the strength and function of the fibers, the fibers have been subjected to surface modification and corona, electroplating, vacuum coating, and the like. The use of ray processing techniques for superfibers can greatly increase their strength. Super synthetic fiber used in tires has undergone a variety of researches. Kevlar fiber has a variety of processes that do not use latex or rubber paste. High-functional fiber materials such as wholly aromatic polyesters, high-polymerization PE, fluorine-based, and POM have also been gradually applied in special synthetic fibers. Conductive fibers and magnetically conductive fiber composite plastics (films) are also widely used, mainly used in anti-static, electromagnetic and other sensitive packaging containers and packaging materials.
6. Special rubbers, special rubbers for sealing and damping materials are mainly based on NBR, NHBR, CO/ECO, and ACM, and Japan's production level is the best. Among them, NBR has good performance, wide application, more than 300 kinds of specifications, and new functions of NBR are also coming out. NHBR has a good overall performance and is developing toward high strength. EC/ECO has excellent heat resistance, aging resistance and ozone resistance, and ACM is strengthening its oil resistance and cold resistance. (Unfinished)
Several high-tech materials in the packaging world (top)
1. Due to the development of thinning technology, metal foil materials and profiled materials have been greatly increased in metal foil types. The main varieties are gold foil, copper foil, aluminum foil, stainless steel foil, aluminum foil, titanium foil, copper foil, Be foil, Pd foil, and Ta foil. Various alloy foils such as Ni foil, Ag foil, Ph foil, Zn foil, iron foil, and Ni-CR. There are three directions for the development of metal foil: ultra-long, ultra-thin, super-thin; porous cavitation; composite.