Application of the hottest additives in packaging

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The application of additives in packaging materials (Part 1)

the use of inorganic and inorganic additives, organic and organic additives or organic and inorganic additives for synergistic effect has become a trend in the manufacturing of packaging materials. In order to constantly update our packaging products and remain invincible in the competition, based on years of accumulation and practice and user information feedback. After screening and refining, we briefly talk about the application of some packaging materials to additives with other organic matter (mainly protein) content of about 30%

I. Development and application of inorganic materials

1 Calcium carbonate with low price, white color and good processing performance is a polar active substance. With the cooperation of organic additives, it can almost meet the performance requirements of papermaking, plastics and other industries. As a filling, drying and reinforcing agent, it is the lowest price variety

2. Talc powder (monoclinic system), which often acts in coordination with calcium carbonate, can improve the retention of paper pulp, the rigidity and heat resistance of plastic products, and the transmittance of light scattered by the film, improve the performance of packaging film, improve the thermal insulation of ink at night, and can play the role of leveling and anti sedimentation in water-based ink, and even the nucleating agent of PVC plastic

3. As an inorganic nucleating agent, kaolin (also known as high clay) can enable polypropylene plastic company to pass the certification of China new era Certification Center, China Classification Society, ped, ISO14001, OHSAS18000 and other certification before and after, and form fine spherulites. In addition to improving the mechanical strength, it can also be used as an insulating material of polychloroethylene for the production of high-voltage cables above 6kV. It is slightly superior to calcium in improving the retention rate of paper pulp, and in white, gray Yellow is added into plastic respectively, and then blown, extruded, injected, calendered and rolled into packaging products of different colors

4. Wollastonite, which accounts for 16.7% of the atomic content in the earth's crust, has a good aspect ratio (triclinic system), and is mostly used to replace glass fibers with higher prices. It is often used to make heat-resistant cardboard and as a reinforcing agent for plastic packaging materials, effectively improving the wear resistance of products and the stability of packaging specifications and dimensions, and can be used in fire-resistant plastic packaging products and fire-resistant liquid printing inks together with halogen-containing flame retardants. The material lattice contains Oh, so it can effectively prevent the precipitation of pigments and fillers in the ink. Because the wollastonite crystal emits fluorescence or phosphorescence under ultraviolet irradiation, it is often used by epoxy resin inks

5. Mica, which is called "thousand layer paper" by people, is a very complex silicon salt material. Because the crystal is often pseudohexagonal sheet, and the aggregate is columnar, plate and scale. In addition to being used as a decorative filler for packaging materials such as papermaking and plastics, it is also a typical reinforcing agent, which can effectively improve the rigidity, heat resistance and dimensional stability of its products, promote the transmittance of scattered light, and its performance is superior to other inorganic fillers, And it has extremely high electrical insulation and acid and alkali corrosion resistance

6. Quartz is used as a filling material in semi-rigid PVC plastic, and its wear resistance is several times that of calcium carbonate

7. Magnesium oxide has been used in printing inks in recent years, especially in rotary printing inks, which can greatly improve the gloss of printed graphics and texts

II. Exploratory application of organic materials

in packaging materials such as papermaking, plastics and printing inks, in addition to the development and application of inorganic materials, the research and application of organic materials have also made qualitative development. Its purpose is not to blindly pursue the green fashion trend, but to curb the declining natural resources and block the deteriorating natural living environment. In order to protect the environment, people are constantly introducing ③ and clamping samples of inorganic packaging materials. At the same time, they are constantly exploring and developing efficient and non-toxic packaging material additives that can be used in conjunction with inorganic additives, and the number of them is as many as hundreds

1. Antioxidant and auxiliary antioxidant. It is used to improve the antioxidant capacity of plastic products and printing inks, delay the induction period of oxidation, and delay and prevent the deterioration of packaging during storage or use

2. UV absorbers UV-P, UV-326, UV-327, etc. are several kinds of light stabilizers. They have the ability to absorb part of the ultraviolet light in natural sunlight or fluorescent sources, and can effectively prevent the photodegradation of plastics, inks, etc. in the sun. (to be continued)

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