The hottest new plastic packaging materials

2022-07-31
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New plastic packaging materials

from the perspective of the development of the world's packaging industry, although plastic packaging materials have been severely challenged by environmental problems, plastic packaging is still one of the fastest growing materials in the packaging industry. In order to meet the requirements of the new era, plastic packaging materials are required to not only meet the increasing requirements of market packaging quality and efficiency, but also further require them to save energy and resources, and to be easily recycled or degraded by the environment after use as the starting point of technological development. Therefore, plastic packaging materials are developing in the direction of high function, multi-function, environmental adaptability, new materials, new processes, new equipment and expanding application fields

high performance and multifunctional plastic packaging materials are becoming the focus of development in many countries, and some products have been put into industrial production. Such materials include high impermeability, multi-functional freshness preservation, selective permeability, heat resistance, sterility (anti-bacterial), rust prevention, deodorization, resealability, and easy unsealing. Among them, high impermeability, multi-functional freshness preservation, and sterile packaging materials are developing more rapidly. In addition, nanocomposite packaging materials that are being researched and developed in recent years are receiving attention

polyethylene naphthalene dicarboxylate (pen)

pen's resin structure is very similar to that of pet, but pen is superior to pet in all aspects. It has the following characteristics: 1. The thermal deformation temperature of pen is 30 ℃ higher than that of pet and reaches 100 ℃, which can be used for hot filling. 2. The glass transition temperature of pen is about 40 ℃ higher than that of pet; At the same time, its tensile strength, bending modulus and bending strength are also high, so pen has good dimensional stability, low thermal shrinkage and good long-term heat resistance. 3. Pen is superior to pet in acid resistance, alkali resistance, hydrolytic resistance and general chemical resistance. 4. Pen is a kind of plastic with good gas barrier property. Its barrier property to oxygen, carbon dioxide and water is 4 times, 5 times and 3.5 times higher than pet respectively. 5. Compared with pet, pen has less adsorption for organic solvents and its own free and precipitation properties are also low. 6. The crystallinity of pen is lower than that of pet, and it is easy to make thick wall transparent bottles. 7. it has good UV resistance. 8. Pen has good sanitary performance

pen has excellent characteristics and is an ideal packaging material. However, the high price of pen limits its wide use as a packaging material. As pen and pet are both thermoplastic polyesters, and their chemical structures are similar, making polymer alloys by melting and blending pen and pet with a certain proportion can give consideration to the economy of pet and the excellent characteristics of pen, such as heat resistance and gas resistance, which is the development focus of pen application research at present, It is also one of the main ways to make pen go to the market (especially in the packaging field). When 10%-20% pen is blended with pet, the resistance to oxygen and carbon dioxide can be increased by 30%-50% and 23%-37% respectively, and the UV shielding wavelength can be increased to 380nm. Pen/PET BLENDS or copolymers have been used in the packaging of edible oil, alcohol, carbonated beverages and beer

at present, bottle packaging containers have become the main market of pen. Due to the excellent characteristics of pen, the performance of pen bottle blown with pen is better than that of PET bottle. Pen bottle is transparent, hot filling temperature can reach about 100 ℃, it has good barrier to ultraviolet, oxygen and carbon dioxide, and is resistant to chemicals. It is used in the packaging of beverages, beer, cosmetics and baby food. It has great practicality and market. Especially in beer packaging, it makes up for the defects of pet and glass, and has become a hot topic in recent years

teijin company is a pioneer in the production of biaxially oriented pen films in the world. As early as 1989, graphene had such potential; Silicon has successfully developed a high-function pen film, and built a 4000 ton/year film production line in 1993, "said Jean Claude Pierre, CEO of Scott Bader company. In addition, Toray, DuPont and other world film production giants have also successively entered the pen film production market. Pen can be manufactured with the same equipment as pet. The process is the same as that of PET film production. Pen film (bopen) is prepared by melting, extrusion and biaxial stretching. Bopen has excellent heat resistance, gas barrier, hydrolytic resistance, dimensional stability and other characteristics, and is easy to be prepared with a thickness of 0.8 μ M can be used to produce packaging materials for different purposes, which occupy a large market in food packaging, pharmaceutical packaging, fragrance preservation packaging and impact resistance packaging of precision instruments

polyvinylidene chloride (PVDC)

pvdc is a light yellow, powdery, high barrier material. In addition to the general properties of plastics, it also has the properties of self extinguishing, oil resistance, taste retention, excellent moisture and mold resistance, as well as excellent printing and heat sealing properties

pvdc is a kind of packaging material with better comprehensive barrier performance in plastic packaging in the world. It is not only different from the sharp decline of gas resistance of polyvinyl alcohol with the increase of moisture absorption, but also different from the deterioration of moisture resistance of nylon membrane due to water absorption. It is a high barrier material with good moisture and gas resistance. It not only has excellent high barrier performance, but also has excellent printing performance, composite performance and transparency. In practical application, PVDC coating film has no special requirements for printing ink and equipment, so there is no need to change the process of each process, which can greatly improve the production efficiency and reduce the cost

compared with ordinary PE film, paper, aluminum foil and other packaging materials, the composite packaging using PVDC can reduce the amount of packaging and waste. In the United States, PVDC products are non-toxic and safe plastic materials, which have been widely used in food packaging; In Germany, the packaging material has a green mark; About 60% of the small packaged food, medicine, chemical products and electronic products circulating in the markets of Japan and South Korea use PVDC packaging. With the popularity of this new packaging material, in recent years, the output of PVDC resin in western countries has increased year by year, with an annual growth rate of about 2% in the United States and nearly 10% in Japan

in view of the fact that the level of food packaging in China is still relatively backward, relevant experts pointed out that the promotion and use of PVDC materials can not only improve the level of packaging products in China, but also reduce the losses caused by product packaging, so as to enhance the market competitiveness and establish a new image of the enterprise. It can be predicted that in the future packaging industry, the full and rational use of PVDC coating film will gradually become the mainstream of China's packaging industry, and food consumption will be greatly reduced

water soluble plastic (PVA)

polyvinyl alcohol (PVA for short) is a kind of water-soluble polymer with a wide range of applications. Its properties are between plastic and rubber. As a novel green packaging material, it is widely used in the packaging of various products in Europe, America, Japan and other countries, such as pesticides, fertilizers, pigments, dyes, detergents, water treatment agents, mineral additives, detergents, concrete additives, photographic chemicals and garden care chemicals. It is mainly pressed into the surface of the sample under the action of the standard spring experimental force. The characteristics are as follows: 1. the degradation is complete, and the final products of degradation are CO2 and H2O, which can completely solve the problem of packaging waste treatment; 2. it is safe and convenient to use, avoiding users' direct contact with the packaged goods, and can be used for packaging goods harmful to human body; 3. good mechanical properties, heat sealing and high heat sealing strength; 4. with anti-counterfeiting function, it can be used as the best weapon for anti-counterfeiting of high-quality products and prolong the life cycle of high-quality products

in terms of degradation mechanism, polyvinyl alcohol has two degradation characteristics of water and biology. First, it dissolves in water to form glue solution and infiltrates into the soil, which increases the soil's stickiness, permeability and water retention. It is especially suitable for sand soil transformation. PVA in soil can be decomposed by bacteria isolated from soil, Pseudomonas. The symbiotic system composed of at least two bacteria can degrade polyvinyl alcohol: one is the active bacteria of polyvinyl alcohol, and the other is the bacteria that produce the substances required by the active bacteria of PVA. The secondary alcohol oxidation reaction enzyme catalyzes polyvinyl alcohol, and then the hydrolase cuts off the oxidized PVA main chain for further degradation, and finally it can be degraded into CO2 and H2O

water soluble films have been widely valued by developed countries in the world because of their environmental protection characteristics. For example, Japan, the United States and France have produced and sold such products in large quantities, such as w.t.p and c.c.i.p in the United States, greensol in France and synthetic chemistry in Japan. Their users are also some famous large companies, such as bayet (Bayer), Henkel (Henkel), shell (shell), a (aegfu) and other large companies have begun to use water-soluble films to package their products

in China, the water-soluble film market is rising. According to relevant statistics, China's annual demand for packaging film accounts for 20% of plastic products, about 309000 tons. Even if it accounts for 5% of the market, the annual demand will also reach 15000 tons. At present, the market price of American products is 10000 yuan/ton, and that of Japanese products is 10000 yuan/ton. The sales price of domestic products is only 40% of that of the United States. The average price is 60000 yuan/ton, so it has strong competitiveness in price. With the development and progress of society, people pay more and more attention to the protection of the environment on which we live. Especially after China's entry into the WTO, it is in line with the world's developed countries, and the requirements for environmental protection of packaging are increasing. Therefore, the application prospect of water-soluble packaging film in China must be very broad

polypyrazinamide (PZA)

similar to polystyrene, PZA polymer is a highly transparent material with good operating performance and resistance to water dissolution, which is suitable for most thermoforming processes; Traditional processing equipment can be used, including sheet and film extrusion equipment, film blowing manufacturing, fiber drawing and injection molding equipment. Compared with pet, it has good price and performance potential. It can also provide excellent adhesion and gloss properties, and has good metallization properties

at present, the commercial applications of this PZA polymer include: compostable food bags and "lawn waste" bags, yogurt packaging cartons, mats for sowing and non-woven covers to prevent the growth of weeds. This kind of polymer has been produced in pzazt plant in the United States, and the production capacity will reach 7200 tons by the end of this year. Although this PZA resin has emerged in the market, it is still limited to the demand for biodegradation

with the improvement of the quality and functionality of plastic packaging products, new varieties of plastics for packaging are constantly developed, and the uses of the original varieties of plastics are further expanded. In particular, the high barrier plastic packaging materials are mainly food packaging, and gradually expand the broadband to enter the world of colorful springs into the field of non food packaging. Among them, industrial packaging, pharmaceutical packaging, agricultural and sideline products packaging, building materials packaging, marine supplies packaging, etc. will be further developed

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