Ten high-tech materials in the packaging field

The development of science and technology promotes the renewal and progress of materials, and the transformation of the concept of consumers accelerates the development and progress of the packaging industry. Coordination with each other further strengthens the evolution of packaging materials and changes in functionality. At present, the investment in technology has created new packaging materials, and some high-tech materials have been used in the packaging field. However, others are in the packaging world to try their hand at the beginning or to show their advantages. Of course, some materials have great development potential. In this paper, a new form is used to scan high-tech materials in packaging, and a packaged high-tech material summary for packaging customers.

Nano packaging material

Nano-packaging materials are the hot research direction this year. They are emerging packaging materials, including nano-multi-packaging materials, polymer-based composite packaging materials, and nano-type antibacterial packaging materials. At present, the most studied nanocomposite packaging material is polymer-based nanocomposite (PNMC). Its plasticity, wear resistance, hard strength and other properties have been significantly improved and enhanced; in polymer-based nanocomposite packaging materials, The polymer layered inorganic nanocomposite packaging material has been rapidly developed due to the breakthrough of the silicon layer technology, and some of the research results have begun to enter the industrialization or have attracted great attention due to great industrial application prospects; for nano-inorganic antibacterial packaging materials It has obvious characteristics: long-acting antibacterial ability, broad-spectrum antibacterial properties, excellent killing rate, safety of anti-cloud agent to humans and animals, stability of physical and chemical properties of antibacterial products, and low cost of antibacterial agents.

2. Metal Matrix Composites

Metal matrix composites have relatively high strength, high modulus, high temperature performance, and good electrical and thermal conductivity. They are particularly suitable for aerospace and other industrial sectors. Metal matrix composite technology has made rapid progress and many methods. Therefore, the metals used for the recombination are mainly Ti, Ni, Cu, Pb, and Ag, and particularly light metal-based Al, Mg, Ti, and the like. 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 heart, artificial valves, artificial lungs, artificial warts, artificial bones and so on. The application of bio-polymer materials in packaging is expanding day by day. Microbial (bacterial) plastics, bio-degradable plastics, and bio-optically solvable plastics are all hot topics in the packaging world today.

4. Silicone and fluorine 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 hydridosilane methylation are explored, molecular diversified functional materials are developed, and optoelectronic functional materials of high-grade composite membrane equipment are developed. (Organic silicon is a kind of excellent ecological material (Ecomaterials), mainly used in aerospace, automotive, construction, bioengineering and other high-tech fields. The next stage goal is to improve the molecular design and synthesis technology to achieve the functionalization of organic silicon, Optimization of polymer synthesis and material preparation techniques.

There is good progress 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, fluorine-based polymers with good piezoelectric properties, antistatic properties, radiation resistance, and abrasion resistance have been introduced.

5. New Plastics and Plastic Alloys

In China, we have developed engineering plastics such as polysulfone, polyphenylene sulfide, polyether ether esters, polyacrylic acid amines, 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 are the fastest growing, especially in automotive and automation equipment and electronics.
There are mainly PBT/ABS, PBT/PC, PBT/silicone, PBT/PPE, PBT/PET, and PBT plastic alloys used to make special high-strength packaging containers, while the US PET alloy (LCP10%) performs better than PET. Many are also beginning to apply in packaging.

6. Metal foil and profile

Due to the development of thinning technology, the types of metal foils are greatly increased. 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 directions for the development of metal foil: ultra-long, ultra-thin, super-thin; porous cavitation; composite.

Shaped material development is also very rapid, all kinds of special-shaped (such as complex honeycomb) materials can be produced, and the profile is becoming thinner, lighter, and functional. Profiles, especially paper honeycombs, have a small amount of application in the packaging field and they are promising.

7. Functional polymer materials

There are several major categories of functional polymer materials: 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, adsorption materials, 4) magnetics Functions such as magnetic polymer materials 5) Mechanical functions such as separation membranes in mass transfer function 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) Smart polymer materials (such as polyfluorene, polyfluorene, polyaniline) and so on.

8. Surface modification material

A wide variety of modern modified materials, metal, non-metallic, ceramic, plastic and multi-component complexes. The surface modification of new materials used in the packaging industry is relatively more. For example, in order to improve the condensation performance of the packaging plastic film, vacuum vapor deposition (PVD) technology is used to "coat" a very thin layer of aluminum film on the plastic surface, and a silicon oxide film, etc.; the plastic film is processed by laser scanning; The use of acid monitoring and passivation technology for the surface modification of electrolytic iron foil, strengthen the material properties and so on. And these two trends will continue.

9. Organic Optoelectronic Materials

Photoelectron organic polymer materials newly developed varieties are: organic light color polymer materials, non-linear optical materials, photoreactive materials, polarizing polymer materials, select the first light, select light-transmitting polymer materials, photoelectric conversion functional materials, pressure Electrically functional polymer materials and so on. Non-linear optical polymers (NLOs), gradient-index polymers (such as methyl phenylenoates, vinyl benzoates, etc.) have also made considerable progress. Therefore, organic optoelectronic materials have great potential for application in special packaging.

1 0. Resin Matrix Composites

With resin as the matrix, there are a wide variety of polymer composite materials that can be composited with various fibers, granules or films. Such as the addition of conductive fibers composite into conductive functional materials, wave absorbing functional materials, adding ceramic, glass fiber and carbon fiber reinforced composite materials, or different resin film multilayer composite composite materials, etc., its application is very wide; reinforced fiber composite type There are more than 30 types of fibers commonly used. In the packaging has been widely used in the main organic layer composite, co-extruded composite, mixed composite type of composite materials.

The development trend of resin-based composite materials: First, to improve the composite process, improve the performance and function of composite materials; Second, select the appropriate materials and the best process to reduce the cost of composite materials; Third, the development of new varieties, such as the structure is being developed Materials, functional materials, molecular composites, ecological composites, and more.