Ten high-tech materials in the packaging field
The development of science and technology promotes the renewal and advancement of materials, the transformation of consumer concepts accelerates the development and progress of the packaging industry, and mutual coordination further strengthens the evolution and functional transformation of packaging materials. At present, the investment in technology has created new packaging materials, and some high-tech materials have been expanded and applied in the packaging field, but others are in the packaging world to try their hand or show their sharpness. Of course, some materials have great potential for development. This paper combines the new form to scan the high-tech materials in the package and make a summary of the packaged high-tech materials for the packaging customers.
1. Nano packaging materials
Nano-packaging materials are a hot research direction this year. They are an emerging packaging material, mainly including nano-composite materials, polymer-based composite packaging materials, and nano-type antibacterial packaging materials. At present, the most researched nanocomposite packaging material is polymer-based nanocomposite (PNMC), which has obvious improvement and enhancement of plasticity, wear resistance and hard strength; in polymer-based nanocomposite packaging materials, The polymer layered inorganic nanocomposite packaging material has been rapidly developed due to the breakthrough of the enamel layer technology, and some research results have begun to enter the industrialization or have attracted much attention due to the great industrial application prospect; for the nano inorganic and inorganic antibacterial packaging materials It has obvious characteristics: long-lasting antibacterial ability, broad spectrum of antibacterial properties, excellent killing rate, anti-cloud agent for human and animal safety, stable physical and chemical properties of antibacterial products, and low cost of antibacterial agents.
2. Metal matrix composites
Metal matrix composites have high strength, high modulus, high temperature performance, good electrical and thermal conductivity, and are especially suitable for aviation and other industrial sectors. Metal-based composite technology has advanced rapidly and has a variety of methods. Therefore, the metals used for the composite are mainly Ti, Ni, Cu, Pb, Ag, especially light metal based Al, Mg, Ti, and the like. Composite materials are metals, non-metals and other compounds.
3. Biopolymer materials
Biopolymer materials have entered experimental stages such as artificial blood vessels, artificial hearts, artificial valves, artificial lungs, artificial tendons, artificial bones, and the like. The application of biopolymer materials in packaging is expanding. For example, microbial (bacterial) plastics, biodegradable plastics, and glazing plastics are hot topics in the packaging world today.
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, the synthesis reactions such as defluorination condensation and hydrosilane methylation are discussed, and molecular diversified functional materials are developed to develop optoelectronic functional materials for high-grade composite filming equipment. (Silicone is an excellent ecomaterials, mainly used in aerospace, automotive, construction, bioengineering and other high-tech fields. The next stage is to improve molecular design and synthesis technology, to achieve silicone functionalization, Optimization of polymer synthesis and material preparation techniques.
Fluorine-based materials have made good progress in packaging applications. For example: high strength, functionalization, high stability of PTFE, thermal stability of PEA, functional film of PVDF. In addition, fluorine-based polymers having excellent piezoelectricity, antistatic property, radiation resistance, and abrasion resistance have been introduced.
5. New plastics and plastic alloys
In China, engineering plastics such as polysulfone, polyphenylene sulfide, polyether ether ester, polyacrylamide and polyarylate have been developed and applied well. Foreign polycarbonate, polyester, polyphenolamine, and polyoxymethylene still dominate the market. Among them, polycarbonate is the fastest growing. Engineering plastics mainly study modification and application, alloying technology, composite technology and processing technology. Plastic alloys mainly study interpenetrating networks, graft copolymerization and block copolymerization, molecular compounding techniques, reactive extrusion, inter-blending and physical mixing in alloying technology.
In foreign countries, PBT and PET alloys have the fastest development, especially in automotive and automation equipment and electronics.
There are mainly reports of PBT/ABS, PBT/PC, PBT/silicone, PBT/PPE, PBT/PET, PBT plastic alloys for the manufacture of special high-strength packaging containers, while the US PET alloy (LCP10%) outperforms PET. Many, also started to apply in the packaging.
6. Metal foil and profile
Due to the development of thinning technology, the variety of metal foils has increased greatly. The main varieties are gold foil, copper foil, aluminum foil, Be foil, Ta foil, Ag foil, Zn foil, iron foil, and various alloy foils such as Ni-CR. . There are three development directions for metal foil: super long, super thin, super thin; porous cavity; composite.
The development of profiled materials is also very rapid, and various shaped (such as complex honeycomb) materials can be produced, and the profiles are becoming thinner, lighter and functional. Profiles, especially paper honeycomb materials, are also used in small quantities in the packaging field and are promising.
7. Functional polymer materials
There are several major categories of functional polymer materials: 1) electro-functional polymers such as conductive materials 2) photo-functional molecules such as photoconductive materials, gradient-index polymers 3) chemical functions such as catalytic materials, adsorbent materials 4) magnetic Functions such as magnetic polymer materials 5) Mechanical functions such as separation membranes in mass transfer functional materials, oxygen-rich membrane polymer materials 6) Biological functions such as biomedical polymer materials, biodegradable materials (heat shrinkable films), heat resistant polymers Materials, thermochromic materials 7) Intelligent polymer materials (such as polyfluorene, polybenzazole, polyaniline) and so on.
8. Surface modification materials
Modern modified materials come in a wide variety of materials, including metallic, non-metallic, ceramic, plastic and multi-component composites. The surface modification of new materials used in the packaging industry is relatively more. For example, in order to improve the condensation properties of the packaged plastic film, vacuum vapor deposition (PVD) technology is used to 'coat' a very thin aluminum film on the surface of the plastic, as well as a silicon oxide film, etc.; the plastic film is processed by laser scanning; The surface of the electrolytic iron foil is modified by the acid-adjusting passivation technology to enhance the material properties and the like. And these two trends will continue.
9. Organic optoelectronic materials
The newly developed varieties of optoelectronic organic polymer materials include: organic photochromic polymer materials, nonlinear optical materials, photorefractive materials, polarized polymer materials, selective headlights, selective light-transmitting polymer materials, photoelectric conversion functional materials, and pressure. Electrical functional polymer materials and the like. Non-linear optical polymers (NLO), gradient-index polymers (such as methyl phenates, vinyl benzoate, etc.) have also made great progress. Therefore, the application of organic optoelectronic materials in special packaging has great potential.
10. Resin-based composite materials
A variety of polymer composites that are compounded with various fibers, granules, or films based on a resin. Such as adding conductive fibers into conductive functional materials, absorbing functional materials, adding ceramics, glass fiber and carbon fiber composite reinforcing materials, or multi-layering of different resin films into composite materials, etc., and its application fields are extensive; reinforcing fiber composite type More than 30 kinds of fibers are commonly used. The main organic layer composite, coextrusion composite, hybrid composite and other types of composite materials have been widely used in packaging.
The development trend of resin-based composite materials: one is to improve the composite process, improve the performance and function of the composite; the second is to select the appropriate materials and the best process to reduce the cost of composite materials; the third is to develop new varieties, such as the structuring being developed Materials, functional materials, molecular composites, ecological composites, etc.