Development trend of composite flexible packaging

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Development trend of composite flexible packaging materials in the world

since the advent of composite packaging film materials in the 1950s, the packaging industry has entered a new era of modern packaging from the traditional packaging of single packaging materials, and also triggered a revolution in the packaging field. Up to now, various composite materials have been widely used in the packaging industry. The development trend and application of some new composite packaging materials in the international packaging industry will guide the new trend at the beginning of this century, which is worthy of attention by the domestic packaging industry

new composite "paper" it is a kind of super strength composite "paper", which was successfully developed by scientists of the former Soviet Union. The paper is as white as snow, as thin as cicada wings, and as soft as brocade. It is still intact after repeated folding, and the price is low. The "paper" is made of basalt fiber at a high temperature of 2000 ℃, impregnated with phenolic resin and infiltrated into clay powder to make a film. Because the composite "paper" is based on rock, it will not become brittle, moldy, moth eaten and other phenomena after long-term storage, and it can be dyed and printed. In addition, it is still a big problem faced by manufacturers. It can also be made into dust-free paper, sterilization paper, anti electrified paper, anti electromagnetic interference paper, high transparency paper, etc

deodorizing materials at present, there are more than 40 kinds of deodorizing materials on the market, but there are mainly three types. Class A in Japan belongs to chemical deodorization type, which can remove nitrogen compounds and sulfur compounds, such as ammonia, dimethylamine, trimethylamine, hydrogen sulfide and other odors. Class B is mainly used to remove odor such as hydrogen sulfide and formic acid, which is characterized by good deodorization effect on high concentration hydrogen sulfide. Class C material is of physical deodorization type, which is made of activated carbon deodorizer. The deodorization characteristics of this material are low concentration and good deodorization. Deodorizing film is used in food packaging. In addition to its fresh-keeping function, it is also mainly used in the packaging of food, agricultural products and aquatic products with special smell. In addition, it has also made progress in the packaging of medical materials, sanitary materials, daily sundries and so on. It should be noted that the deodorization film is selective, so it should be selected according to the odor composition, concentration, environmental humidity and other factors in order to obtain the best effect

food spoilage or deterioration caused by microorganisms of antibacterial materials is a headache and annoying problem, so antibacterial packaging has become a hot topic. Therefore, Japan added a new type of non model antibacterial agent to the packaging materials, and successfully developed antibacterial packaging materials, which have antibacterial effects on a variety of pathogens participating in international competition. At present, antibacterial film is widely used. It is because the relative resolution of the machine is 1/120000 It is made by adding antibacterial agent and synergist to polyolefin film. This kind of antibacterial packaging material has antibacterial effect on most common microorganisms such as Escherichia coli, Staphylococcus aureus, and Trichoderma nigricans

high barrier materials as we all know, aluminum-plastic composite packaging materials have superior performance, but they are opaque. Therefore, a new high barrier material has been successfully developed internationally, and other properties are equal to or better than aluminum-plastic composite packaging materials. This composite packaging material, called GT, is made by depositing a layer of inorganic substances (such as silicon oxide and titanium oxide) with a thickness of 100 nm on the surface of plastic film. Its coating performance is stable. Even after high-temperature sterilization, its gas barrier performance is equivalent to EVOH with a thickness of 25 microns, and the price is lower than the latter

the packaging machinery of low-temperature sealing materials requires simplicity and convenience, saving energy, improving speed and efficiency to meet the needs of modern mass packaging, so the use of low-temperature sealing packaging materials is a necessary condition. It has a series of characteristics: it has no thermal effect on the contents of the package, so it is especially suitable for the packaging of heat averse items; It can be applied to substrates that are difficult to heat seal; It can simplify the packaging structure, reduce costs and save energy; Can realize high-speed packaging; The sealing has good cold resistance. Even if it is sealed at - 20 ℃, the strength will not be reduced

the requirements of the high lining sealing material market for flexible packaging are mainly fashionable, beautiful and low price. For example, the packaging of chocolate and other products, due to the influence of heat, requires low packaging temperature and beautiful sealing, and high-speed sealing packaging materials came into being. This is a kind of packaging material coated with low temperature heat sealing layer HSS, which can be sealed at high speed at low temperature. It is superior to other materials such as EVA, acrylic resin, heat sealing varnish, trace paraffin, etc., so it can be used in packaging that is strictly limited to the impact of odor. It is characterized by fast sealing speed and is suitable for high-speed machinery. For example, when OPP/Kop/HSS packaging materials are used, the speed of bag making machine can reach 500/min. HSS of low temperature layer can be coated not only on the surface of paper and aluminum foil, but also on the surface of OPP, Kop, pet, PVC, PE and other plastic films. Generally, the thickness of HSS coating is about a few microns, which can meet the requirements

conductive packaging materials in the early American electronic industry, the losses caused by the poor conductivity of packaging materials exceeded millions of dollars every year, prompting people to study it. Therefore, the development of conductive packaging materials in the United States was early and fast, and a series of conductive packaging materials have been formed, which are mainly used for the packaging of electrostatic sensitive products to prevent electrification and eliminate static electricity, as well as the anti electromagnetic packaging of precision instruments and missiles

it is better to use composite functional materials for some functional packaging materials than for all functional packaging materials. The common ones are rust proof, mold proof, fresh-keeping, nano type and so on

due to people's requirements for a high standard of living, fresh-keeping packaging has developed rapidly. There are more than 100 series of fresh-keeping functional materials that have been successfully developed. In order to be convenient to use, bags or sheets are usually processed successfully

intelligent packaging materials at present, the intelligent packaging materials that have been successfully developed. Through the successful cases of overseas mergers and acquisitions, Kearney concluded that materials are usually made of functional materials such as photoelectric, temperature sensitive, humidity sensitive and packaging materials. It can identify and indicate the temperature, humidity, pressure, sealing degree, time and other important parameters of the packaging space. It is a promising intelligent packaging material

in the future, composite packaging materials will develop in the direction of serialization, multi-function, high performance and special functions. In the new century, we are bound to be greeted by a hundred flowers of composite packaging materials

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