Hot melt adhesive for bonding cable heat shrinkage bush

Abstract

The invention relates to a hot melt adhesive for bonding a cable heat shrinkage bush. The hot melt adhesive comprises, by weight, 40-60 parts of ethylene-vinyl acetate, 10-20 parts of PE hot melt adhesive, 10-30 parts of a tackifying resin, 1-10 parts of wax and 0-5 parts of an assistant, and the modified PE hot melt adhesive is extrusion-grade linear PE. The hot melt adhesive for bonding a cable heat shrinkage bush has the advantages of required bonding strength, low-temperature use, good adhesion resistance, and satisfying of transport requirements after use.

Description

technical field [0001] The invention relates to a hot-melt adhesive, in particular to a hot-melt adhesive for bonding cable heat-shrinkable sleeves. Background technique [0002] With the gradual development of science and technology, the communication industry is fully popularized in our country. For safety protection, heat-shrinkable safety caps, heat-shrinkable tubes and other heat-shrinkable materials are used on the cable head. Heat-shrinkable tubing has properties such as flame retardancy, insulation, and temperature resistance. It will shrink when heated (70-120°C), and is widely used in the insulation protection of various wiring harnesses, solder joints, and inductors, and the rust and corrosion prevention of metal pipes and rods. The wire and cable factory usually chooses a suitable heat shrinkable tube on the wire head, heats it with a heat gun, and the heat shrinkable tube shrinks, and then the head can be locked. , by heating and shrinking with a hot air blowe...

AI Technical Summary

Problems solved by technology

[0004] 2) After heating and shrinking, the bonding strength between the heat-shrinkable tube and the PE insulation layer on the cable surface must meet certain requirements. If the bonding strength is too small, it will be easily peeled off after being dragged by external forces during use, and it will not play the role of insulation, and it will easily leak water and electricity.

[0005] 3) This kind of hot melt adhesive should not be self-adhesive after spraying, so as to facilitate transportation. Since the heat shrinkable tube is relatively thin and has no certain compression resistance, it is easy to be squeezed by external force during transportation. Viscous is easy to cause adhesion and lead to product scrapping

[0006] CN101880517A discloses a low-temperature-resistant hot-melt adhesive, but this kind of hot-melt adhesive uses a thermoplastic styrene block copolymer, so that the glue must be used at a higher temperature, and this kind of hot-melt adhesive is not suitable for bonding heat. shrink sleeve

Not suitable for the cable industry ①The temperature of this glue has exceeded the heat change temperature of the cable heat shrinkable tube ②The surface of the hot melt adhesive will have self-adhesive phenomenon after spraying, and it will be squeezed by external force during transportation, which will cause adhesion on the surface. Product scrap

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