The advancement of technology promotes the updating and progress of materials, and the transformation of consumer attitudes accelerates the development and progress of the packaging industry. Mutual coordination further strengthens the evolution and functional transformation of packaging materials. At present, technological investment has created new packaging materials, and some high-tech materials have been expanded and applied in the packaging field. However, there are still some materials that are trying their hand or showing their edge in the packaging world, and of course, some materials have great development potential. This article combines the new development situation to scan the high-tech materials in packaging and provide a summary of packaging high-tech materials for packaging customers.
1. Nano packaging materials
Nano packaging materials have been a hot research direction in recent years and are an emerging type of packaging materials, mainly including nanocomposite packaging materials, polymer based composite packaging materials, and nano antibacterial packaging materials. At present, the most extensively studied nanocomposite packaging material is polymer based nanocomposites (PNMC), which have significantly improved and enhanced properties such as plasticity, wear resistance, and hard strength; In polymer based nanocomposite packaging materials, polymer layered inorganic nanocomposite packaging materials have achieved rapid development due to breakthroughs in cutting layer technology. Some research results have begun to enter industrialization or have attracted attention due to their great potential for industrial applications; For nano inorganic antibacterial packaging materials, they have obvious characteristics: long-term antibacterial ability, broad-spectrum antibacterial performance, excellent killing and inhibition rate, safety of antibacterial agents for humans and animals, stable physical and chemical properties of antibacterial products, and low cost of antibacterial agents.
2. Metal Matrix Composite Materials
Metal matrix composite materials have relatively high strength, high modulus, good high-temperature performance, good conductivity and thermal conductivity, and are particularly suitable for aviation and other industrial sectors. Metal matrix composite technology has made rapid progress and there are various methods available. The main metals used for composite are Ti, Ni, Cu, Pb, Ag, especially light metal based Al, Mg, Ti, etc. Composite materials include metals, non-metals, and other compounds.
3. Biopolymer materials
Biopolymer materials have entered the experimental stage, such as artificial blood vessels, artificial hearts, artificial valves, artificial lungs, artificial gills, artificial bones, and so on. The application of biopolymer materials in packaging is increasingly expanding, such as microbial (bacterial) plastics, biodegradable plastics, and biodegradable plastics, which are all hot topics in the packaging world today.
4. Organic silicon and fluorine based materials
Silicon based polymer materials are new materials in the 21st century. At present, based on molecular design and molecular structure control, we are exploring synthesis reactions such as defluorination condensation and hydrogenated silane methylation, developing molecular diversified functional materials, and developing optoelectronic functional materials for high-end composite membrane equipment. Organic silicon is an ecological material with ******* performance, mainly used in aerospace, automotive, construction, bioengineering, and other high-tech fields. The next stage goal is to improve molecular design and synthesis technology, achieve the functionalization of organic silicon, polymer synthesis, and material preparation technology *******.
There has been good progress in the application of fluorine based materials in packaging. For example, the high strength, functionalization, and stability of PTFE, the thermal stability of PEA, and the functional film of PVDF.
In addition, fluorine based polymers with good piezoelectric properties, anti-static properties, radiation resistance, and wear resistance have been introduced.
5. New plastics and plastic alloys
In China, engineering plastics such as polysulfone, polyphenylene sulfide, polyether ether ester, polyamine and polyaryl ester have been mainly developed and applied well. Polycarbonate, polyester, polyphenylamine, and paraformaldehyde still dominate overseas. Among them, polycarbonate has developed rapidly. Engineering plastics mainly research modification and application, alloying technology, composite technology, and processing technology. Plastic alloys mainly study interpenetrating networks, 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 the fields of automobiles, automation equipment, and electronics.
There are mainly reports on the use of PBT/ABS, PBT/PC, PBT/organosilicon, PBT/PPE, PBT/PET, and PBT plastic alloys in the manufacturing of special high-strength packaging containers. However, PET alloys (LCPl0%) in the United States have much better performance than PET and have also begun to be applied in packaging.
6. Metal foil and profile materials
Due to the development of thinning technology, the types of metal foil have greatly increased, mainly including gold foil, copper foil, aluminum foil, beryllium foil, tantalum foil, silver foil, zinc foil, iron foil, as well as various alloy foils such as Ni-CR. There are three development directions for metal foil: ultra-long, ultra-thin, and ultra-thin; Porous cavitation; Compound.
The development of profile materials is also very rapid, and various profiles (such as complex honeycomb profiles) can be produced. Profile materials are developing towards thinness, lightweight, and functionalization. Special profiles, especially paper honeycomb materials, have also been applied in the packaging field and have promising prospects.
7. Functional polymer materials
The new varieties of functional polymer materials mainly fall into several categories: (1) electrically functional polymers such as conductive materials; (2) Photofunctional molecules such as photoconductive materials and 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 membranes and oxygen rich membrane polymer materials in mass transfer functional materials; (6) Biological functions such as biomedical polymer materials, biodegradable materials (heat shrink films), heat-resistant polymer materials, and thermochromic materials; (7) Intelligent polymer materials such as polyaniline, polyaniline, etc.
8. Surface modified materials
There are various types of modern modified materials, including metallic, non-metallic, ceramic, plastic, and multi-component materials. The packaging industry uses relatively more surface modified new materials. For example, in order to improve the condensation performance of packaging plastic films, vacuum vapor deposition (PVD) technology is used to "coat" an extremely thin layer of aluminum film and silicon oxide film on the plastic surface; Using laser scanning to process plastic films; Surface modification of electrolytic iron foil to enhance material properties, etc.
9. Organic optoelectronic materials
The newly developed varieties of organic optoelectronic polymer materials include: organic photochromic polymer materials, nonlinear optical materials, photorefractive materials, polarized polymer materials, selective transparent polymer materials, photoelectric conversion functional materials, piezoelectric functional polymer materials, etc. There has also been significant progress in nonlinear optical polymers (NLO) and gradient refractive index polymers (such as methyl benzoate esters, vinyl benzoate esters, etc.), making the application of organic optoelectronic materials in special packaging very promising.
10. Resin based composite materials
There are various types of polymer composite materials that are composite based on resins, such as various fibers, particle packs, or thin films. Such as adding conductive fibers to composite into conductive functional materials, absorbing functional materials, adding ceramic, glass fiber, and carbon fiber composite reinforcement materials, or multi-layer composite of different resin films into composite materials, etc., their application fields are very wide; More than 30 types of fibers are commonly used in reinforced fiber composites. The main types of composite materials that have been widely used in packaging include organic layer composites, co extrusion composites, and hybrid composites.
The development trend of resin based composite materials: firstly, improving the composite process, improving the properties and functions of composite materials; The second is to choose appropriate materials and ****** processes to reduce the cost of composite materials; The third is to develop new varieties, such as structured materials, functionalized materials, molecular composite materials, ecological composite materials, etc.