China is currently opening three commonly used agents

2016-7-20 9:45:14 Traffic：

China is currently opening three commonly used agents now commonly used anti-slip agent has three opening-blocking agent, oleic acid amide, erucic acid amide, silica. In specific categories and methods of use there are some differences. Introduction 1 oleic acid amide opening a slip agent, also known as oleamide; (Z) -9- octadecenoic acid amide, formula C18H35NO, the molecular weight of 281.48. Oleic acid amide used in polyethylene film which can reduce the friction between the friction within the film during processing and transmission equipment, easy mold release, thereby increasing production rates, improve the surface gloss of the article. With the addition of low levels in the film (0.1-0.15%), the plant must be added as a mixture or masterbatch, in order to ensure uniform smoothness results. Generally, oleamide migrate to the surface fast. Erucamide, but the long-term low coefficient of friction than the oleic acid amide, and good thermal stability than oleamide. 2 erucamide mainly used as CPP, BOPP, LDPE, LLDPE, EV A, PVC, PVDF, PVDC, PU and metallocene polyethylene and other plastics slip agent and antiblock, can significantly reduce the product (film or sheet ) dynamic and static coefficient of friction surface to improve the ease of processing and packaging operations efficiency. 3 Silica Silica uses 1) Maintain a high gloss film. 2) has a higher specific surface area, blocking resistance and strong, very suitable film material of the opening agent. 3) good dispersion, can be uniformly dispersed in the resin inside, made of 10-25% antiblock masterbatch. It can be used for PP, PE and other film products. Two smooth opening mechanism is not easy to separate the film is due to the formation of a vacuum between the film adhesion state after the film is closed, easy to separate; the other is a film after molding surface exposed a large number of molecular chains, is closed after two films produced entwined macromolecular chains, it can not be opened. Cause in fact caused by the opening film is both difficult coexistence, and the latter is the main reason. At the same time the development of the plastics industry, and promote the development of plastic additives. Developed from earlier processing aid to the aid application is a leap. Opening cool slip agent is one example, it has been improved in development. The earliest opening agent is an inorganic talc, diatomaceous earth, etc; medium-term development of organic oleic acid amide, erucic acid amide and EBS derivatives; synthetic silica present as an opening agent in the film is also more extensive. Some additives are present in varying degrees of side effects, mainly in the organic agent opening a large number of precipitates in the film surface, affect the printing of the film, heat sealing and color if a lubricant is added and the organic dispersant in the formulation will produce the same precipitates; contamination of the packing material is very serious, especially in the food packaging, liquid packaging, pharmaceutical packaging and other fields. The early opening of the inorganic agent is to make the surface of the film to reduce the generation of the uneven film and asked to separate the negative pressure; the latter part of the organic agent is an opening in the surface of the film layer of lubricating film, reducing the coefficient of friction of the film, so that does not even stick to each other. Both also hinder wound between the molecular chains. However, these agents are present at the opening of the deficiencies mentioned above. Inorganic opening agent is added and dispersed a large amount of problems affecting the film transparency, strength. The organic openings presence of precipitates affect the color of the film, heat sealability, printability, while pollution to be packaged. Three oleic acid amide and erucic acid amide is oleamide film effect is lower (0.1-0.15%) amount, the plant must be added as a mixture or masterbatch in order to ensure a uniform smoothness results. Oleic acid amide of PE opening effect precipitation fast, able to achieve a very low amount of claims, but it also has a fatal weakness, big taste precipitation fast, resulting in corona and impact printing, especially for the more stringent temperature requirements, in summer and winter the amount is different from the skin and core add another also very particular. To make the composite film (transparent PP and PP pearl film composite membrane) of the friction coefficient is less than 0.4, must be added slip agent (oleic acid amide or erucic acid amide), should generally be added to the core layer (middle layer), it migrate to the surface. BOPP as a new type of packaging material, in the tobacco industry has been widely applied, in order to adapt to the speed of up to 500 to 800 packs per minute of the cigarette packaging machine, the friction coefficient must be ≤0.2, only add erucic acid amide (0.12 % or so) in order to obtain such a low static and dynamic friction coefficient. PP blown film to the slipperiness of the demanding,