The hottest plastic packaging changes our life 0

2022-08-11
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Editor's note: with the development of industry and the needs of consumption, people hope that the storage life of future food industrial products, especially health food, will be longer, which requires the development of composite packaging towards serialization, multi-function, high performance, special functions and so on

people have higher and higher requirements for food industrial products, especially health food. In addition to research and development in the field of food, manufacturers can not short meet people's needs. In many functions, manufacturers can achieve through modern plastic packaging, make up for their own defects, reduce costs, and enhance the core competitiveness of the whole product. The following "advanced" are applicable to the packaging of light and light objects. The packaging required is gradually changing products and our lives

paper based composite packaging is a kind of composite flexible packaging, mainly including film type, bag lining type, embedded type, liquid type, etc. The main problem of paper-based composite packaging is to solve the problem of seepage prevention, which is due to the very small oil molecules. For example, Japan has developed a composite carton containing edible oil, which is very successful. The structure of composite paper is PE/paper/PE/Al/PET/PE, which is made of paper as the base material through aluminum-plastic 6-layer composite. Because the composite layer has aluminum foil, its performance is better than glass bottles and plastic bottles. It is safe, light, and beautifully printed, which improves the added value and competitiveness of goods

new composite "paper" super strength composite paper has been successfully developed abroad. The paper is as white as snow, as thin as cicada wings, and as soft as brocade. It is still intact after repeated folding. It is also called soft glass, and the price is low. This kind of "paper" is made of basalt pulled into fibers at a high temperature of 2000 ℃, impregnated with phenolic resin and infiltrated into clay powder. Because rock is the main material, it will not become brittle, moldy and moth eaten after long-term storage, and it can dye and print colors, which is widely used. In addition, there are dust-free paper, sterilization paper, odor proof paper, anti charged paper, anti electromagnetic interference paper, high absorption paper (i.e. stealth packaging material), and so on

due to the development of supermarkets and fast food stores, a new concept of HMR has emerged and prevailed abroad in recent years, and the HMR market has developed rapidly. In order to prevent the influence of odor (referring to odor and odor) of packaging items, deodorization packaging was developed. At present, there are more than 40 kinds of deodorization packaging materials, which are mainly divided into three types: Class A is a chemical deodorization type, which can remove the odor or peculiar smell of nitrogen compounds and sulfur compounds plus ammonia, dimethylamine, trimethylamine, hydrogen sulfide, etc

b belongs to the physical type, which is mainly used to remove the odor or peculiar smell of hydrogen sulfide, carboxylic acid, etc. it is characterized by good deodorization effect on high concentration hydrogen sulfide

c materials are mixed deodorization type. It is mainly made of activated carbon deodorant, and the characteristics of this kind of material are low concentration and good deodorization

deodorizing wrapping paper film can also play a deodorizing and fresh-keeping effect when used in food packaging. General deodorization packaging is mainly used for the packaging of food with special smell or peculiar smell, as well as agricultural products and aquatic products

the problem of food corruption caused by microorganisms in antibacterial packaging has made antibacterial packaging a hot topic. Therefore, Japan has successfully developed a series of antibacterial packaging materials by adding a new inorganic antibacterial agent to the packaging materials, which has antibacterial effect on a variety of pathogenic bacteria. The main characteristics of the packaging material are as follows: the antibacterial effect lasts for a long time; Because the antibacterial agent is vapor phase, it has no adverse effect on the contents of the package; Good stability

in the process of packaging and processing, it has high thermal stability, stable concentration and no adverse impact on the working environment. Antibacterial packaging materials mainly include sheet, absorbent sheet, packaging film, antibacterial packaging paper, etc. The sheet is mixed with antibacterial agent to polyolefin, etc

it is pressed from resin, and the water absorbent sheet is made of super absorbent resin as the base material, which usually has sheet type and coating type. Such as non-woven fabric/paper/absorbent resin mixed with antibacterial agent/paper/non-woven fabric

at present, antibacterial packaging film is widely used. It is made by adding antibacterial agent into polyolefin film, which has antibacterial effect on most common microorganisms such as Escherichia coli, Staphylococcus aureus, Phytophthora vulgaris, Bacillus perforans, Aspergillus niger, etc

high barrier packaging as we all know, aluminum-plastic composite packaging materials have superior performance, but they are opaque. Therefore, experts have developed a new type of high barrier materials. It has good barrier property, and other properties are equal to or better than aluminum-plastic composites. In case of power failure, this composite packaging material called GT is made by depositing a layer of inorganic material (such as nano silicon oxide or titanium oxide) with a thickness of 10 ~ 100um on the surface of the plastic film. The performance of this nano coating is stable. Even after high-temperature sterilization, its gas resistance, moisture resistance and permeability. Let's talk about the evaluation standard of these equipment: the brightness is still the same

in recent years, the United States has successfully developed a thermal liquid crystal polymer film (TLCP), which is composed of a special dense fibrous polymer long chain with good strength and toughness. The gas barrier property of 2um thick liquid crystal polymer is equivalent to that of 25um thick EVOH, but the price is much lower than the latter

low temperature sealing packaging machinery should be simple and convenient, save energy, improve speed and efficiency to meet the needs of modern mass packaging. Therefore, the use of low temperature sealing packaging materials is a necessary condition for low temperature sealing packaging. The so-called low-temperature packaging material is a packaging material that can be sealed without any heat by coating a low-temperature cold sealing coating with natural rubber as the main component on the surface of the film. It has a series of characteristics: first, it has no thermal effect on the contents of the package, so it is especially suitable for the packaging of heat averse items; Second, the substrate that is difficult to heat seal can be used; Third, it can simplify packaging machinery, reduce costs and save energy; Fourth, it can realize high-speed packaging; Fifth, the sealing has good cold resistance, and the sealing strength will not be reduced even at - 20 ℃

the requirements of high-speed sealing packaging for flexible packaging are mainly fashionable and beautiful, and the price is low. For example, the packaging of products such as chocolate is easy to be affected by heat, so the packaging temperature is required to be low and the sealing is beautiful. Therefore, a high-speed sealing packaging material is developed, which is coated with high-speed heat sealing layer HSS and can seal 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 for the packaging of products that strictly limit the odor or the influence of odor. It is characterized by fast sealing speed and is suitable for high-speed machinery. If OPP/Kop/HSS packaging materials are used, the speed of the tripartite bag making machine can reach 500/min. High speed heat sealing layer HSS can be coated not only on the surface of paper and aluminum foil, but also on the surface of PP, Kop, pet, PVC, PE and other plastic films. Generally, the thickness of HSS coating is about a few microns, which can meet the requirements

composite plastic packaging after China's entry into WTO, due to the reduction of tariffs, the import tax of plastic resin will be reduced by 60%. China's plastic packaging industry has greater development space, and the food flexible packaging industry also has a better development prospect. Polyester: at present, 77% of the bottle polyester resin in the world is used for food packaging, and only 23% of non food packaging. Carbonated beverage bottles are mainly used in food packaging, accounting for about 50% of the total. Other beverage packaging accounted for 21%, edible oil and salad packaging accounted for about 6%. In the past five years, the annual growth rate of polyester bottles has reached 18%. With the improvement of people's living standards, the requirements for packaging materials are also increasing, and polyester packaging containers just meet this requirement. Especially in beverage packaging, polyester bottles have gradually replaced PVC bottles, tin cans and aluminum cans with their excellent performance

PVC: in recent years, with the improvement of people's living standards, various convenient, health care, medical and flavor foods will become the development direction of the food industry. In order to adapt to the development of the market, we should produce more high barrier single films and composite films to meet the requirements of all kinds of cooked food packaging and sterile food packaging. Mold and insect proof packaging of grain, fresh-keeping packaging of cakes, fresh-keeping packaging of vegetables and fruits, long-term frozen food packaging, and microwave food packaging are all huge markets for polyethylene packaging materials

ct materials: after ten years of efforts, Japan Central Chemical Company has successfully developed a special plastic CT for food packaging containers that conforms to the principle of environmental protection. Containers made of CT plastic have little difference from other food packaging containers on the surface, but their internal quality has changed greatly. According to experts, this kind of plastic is a new composite material made by blending about half of the talc powder produced in Liaoning Province into polypropylene plastic. CT is not only resistant to high temperature, but also has the most prominent advantage, that is, its function is similar to that of PSP plastic products commonly known as "foam plastic", and its volume is only equivalent to 1/4 of the latter. In this way, many troubles caused by large volume are avoided during recycling, and extremely favorable conditions are created for eliminating the negative impact on the environment

sterilization and water absorption food bags: the Russian Academy of practical technology has recently developed food packaging bags that can absorb water, sterilize and be used for many times, so that foods that are easy to deteriorate, such as cheese sausage, can be preserved for a long time. Russian experts added dehydrated mineral salts, enzymes and other substances to food packaging polymers

corn plastic: not long ago, American researchers developed a kind of corn plastic packaging material that is easy to decompose. It extracts three genes that can produce plastics from bacteria that produce biopolymers, and then transfers them to rape plants. After a period of time, a plastic polymer liquid is produced, and a rape plastic can be obtained after refining and processing. The packaging tree material or fast food packaging material made of this kind of plastic can decompose by itself after being discarded, and there is no pollution residue

wheat plastic: This is the use of wheat flour mixed with glycerol, glycol, silicone oil and other dry, and then hot pressed into a translucent thermoplastic film. The advantage of packaging food with wheat plastic is that it can be decomposed by microorganisms

bacterial plastic: British researchers have recently developed a PHB bacterial plastic. It first uses sugar to cultivate a bacterium, and then processes it into a material similar to polypropylene. This kind of material is non-toxic and easy to biodegrade. It is an ideal material for processing and making food packaging bags. At the same time, there is no pollution to the environment after abandonment

functional packaging we know that using some composite functional materials is obviously more economical and reasonable than using all composite functional materials. Therefore, the industry developed tls-s series double digital display spring testing machine, which is mainly used to test the conventional mechanical properties of various springs and gas springs, and tested a variety of functional packaging materials. The common ones are rust proof type, anti discoloration type, insect proof type, mold proof type, fresh-keeping type, nano type, etc

due to people's requirements for modern life, fresh-keeping packaging has developed rapidly. There are more than 100 series of fresh-keeping functional materials that have been successfully developed

intelligent packaging refers to the packaging that has the function of "identifying" and "judging" environmental factors. At present, the intelligent packaging developed is usually made of functional materials and packaging materials such as photoelectric, temperature sensitive, humidity sensitive, gas sensitive, etc. It can identify and display the temperature, humidity, pressure, sealing degree, time and other important parameters of the packaging micro space. This is a promising functional packaging, which is particularly important for packaging products that need long-term storage

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