Application of the hottest additives in packaging

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Application of additives in packaging materials (Part 2)

3 Coupling agents, (divided into silicon system and titanium system). Now, the fifth generation coupling agents -- organosilane, organotitanate, organoaluminate and other materials have been introduced. While meeting the dynamic strength index, esters, organozirconate, etc. as fillers for plastics, inks and papers, they can improve the branching degree and interfacial adhesion of the resin, significantly reduce the thickness of the pictures and texts of the packaging printing ink, and achieve solid adhesion

4. Lubricate the anti adhesion agent. It can prevent plastic materials and printing ink from sticking or sticking. In the late 1990s, neutral dispersants containing the same amount of anions and cations were used to treat pigments and fillers, which were not chemically available in the past, because the additives can have good miscibility (compatibility) with many base materials

5. Brightener. Generally, the decomposition temperature is greater than 190 ~ 235 ℃, while DBS can withstand a high temperature of 360 ℃, and has excellent levelness and dyeability. Its maximum spectral absorption wavelength is 370nm. It is mainly used for whitening paper, plastic and ink, and can improve a certain degree of package appearance whiteness

6. Heat stabilizer. The application of more than ten additives such as aluminum stearate, calcium stearate, zinc stearate in plastics, paper and printing ink can effectively prevent the degradation, cross-linking, discoloration and aging of molecular materials caused by heating in the process of processing, manufacturing, use and storage, so as to prolong the use time and ensure the quality

7. Nucleating agent. It is generally used for crystalline polymers with "remote disorder and short-range order". Unlike inorganic nucleating agents, it can greatly improve the transparency of packaging products. Therefore, the transparency of the polymer is improved, the yield strength and impact strength are increased, and the molding cycle and low-temperature characteristics are shortened. Under the same ethylene plastic content, its chain is more evenly distributed than the inorganic nucleating agent. Recently, it has been tested on PE packaging film and photosensitive resin plate, and the light transmittance is ideal

8. Plasticizer. It is often divided into main plasticizer and auxiliary plasticizer, as well as surface plasticizer and system structure plasticizer. According to the chemical structure, there are 11 series and 35 varieties commonly used: phosphate series, phthalate series, aliphatic dibasic esters series, epoxy compounds series, polyester series, oxygenated compounds series, benzoic acid series, fatty acid monoesters series, pyromellitic acid series and trioctyl meta trioxide series. Its function is that the plasticizer molecules can be easily identified and inserted into the molecular chains of the polymer through the use of marks or other ways, so that the attraction between the polymer molecular chains is weakened, that is, the aggregation between the molecular chains is weakened, and the mobility and softness of the molecular chains are increased. If the plasticizer is used improperly, it will often lead to the deformation of paper and plastic products, and the chemical pinholes and binders of photosensitive resin plates and printing inks will become self-adhesive, resulting in application failure

among hundreds of additives for packaging and printing materials, the most commonly used are crosslinking agents that can make packaging materials form a horizontal or vertical shape structure, initiators for glazing agents or light curing inks, antistatic agents that prevent goods from adhering to packaging, photo biodegradable catalysts, etc. In the past two years, the invention of a new method of biotransformation papermaking using cellulose and lignin for efficient separation and chemistry, and a degradable plastic without secondary pollution have proved to be conducive to environmental protection. Therefore, without the invention of material additives, there will be no practical packaging technology innovation

from "value engineering" to "orthogonal method", especially the "backward calculation method" invented in recent years, packaging material additives can innovate formula design, improve its application scope and construction conditions, improve product grade, and endow products with special functions, which has become an indispensable and important part of packaging industrial products. Reasonable and correct selection of additives and scientific scheduling of production can greatly reduce packaging costs and improve economic benefits

whether it is paper product packaging or plastic product packaging, whether it is auxiliary photographic plate making or auxiliary printing ink, there is no packaging material without additives, and there is no additives that packaging materials do not use; A material additive that can make the packaging perfect, especially the recycling and recycling of packaging, and its application level have become an important symbol to measure the development level of packaging technology

to sum up, in addition to the application of the above additives, packaging products are also related to color science, optics, acoustics, electricity, magnetism, mechanics, biology and bionics. Green packaging material additives technology is a frontier science in development, especially organic additives continue to develop in the direction of high efficiency, series, economy, non-toxic, safe, special, simple and easy to use

the risks insured are mainly to protect the contract user's enterprise property loss or personal injury and death risk caused by the quality defects of new materials

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