EVA seamless buffer pipe for membrane product packaging

Abstract

The invention discloses an EVA seamless buffer pipe for membrane product packaging. The EVA seamless buffer pipe comprises an inner pipe, two binding rings, and an EVA buffer outer pipe. The inner pipe is longer than the EVA buffer outer pipe and is inserted into the EVA buffer outer pipe, and the two ends of the inner pipe are exposed at transition ends of the two ends of the EVA buffer outer pipe in an equal-length mode; the two binding rings are correspondingly bound to the inner walls of the two ends of the EVA buffer outer pipe, and used for firmly binding the EVA buffer outer pipe and the inner pipe; the EVA buffer outer pipe is prepared from the raw materials in percentage by weight: 60%-63% of EVA particles, 3%-5% of a foaming agent, 1%-1.2% of a bridging agent DCP, 0.4%-0.6% of atoner, 20%-25% of polyacrylate, 4%-6% of a stabilizer, and 3%-5% of an anti-aging agent. The EVA seamless buffer pipe is integrally formed without seams on the surface, internal stress generated by winding of membrane products can be avoided, a buffer effect is achieved, and membranes are prevented from being deformed due to internal stressed generated by winding of the membrane products.

Description

technical field [0001] The invention relates to the field of film product packaging pipes, in particular to an EVA seamless buffer pipe used for film product packaging. Background technique [0002] In the structure of lithium batteries, the separator is one of the key inner components. For the lithium battery series, since the electrolyte is an organic solvent system, a diaphragm material resistant to organic solvents is required, and a high-strength thin-film polyolefin porous film is generally used. The performance of the separator determines the interface structure and internal resistance of the battery, which directly affects the capacity, cycle and safety performance of the battery. A separator with excellent performance plays an important role in improving the overall performance of the battery. The main function of the diaphragm is to separate the positive and negative electrodes of the battery, prevent the two electrodes from contacting and short circuit, and also ...

AI Technical Summary

Problems solved by technology

And the existing technology is that the packaging of the lithium battery diaphragm material tape is generally directly wound on the core, or wrapped on the core with an elastic sheet, and then the lithium battery diaphragm material tape is wound into the roll. core, but the elastic sheet of this packaging method not only has seams after wrapping, it is easy to damage the film, but also the pores on the elastic sheet are too large, which cannot eliminate the internal stress of the lithium battery diaphragm material tape after winding and cause the film to deform , the surface flatness is not enough to easily damage the inner lithium battery diaphragm, and even make it scrapped, thereby increasing the production cost of the enterprise and causing unnecessary waste

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