Stretching and winding film for automatic steel reel winding and packaging and manufacturing method thereof

Abstract

The invention discloses a stretching and winding film for automatic steel reel winding and packaging.The stretching and winding film is prepared from, by weight, 30-60% of linear low density polyethylene LLDPE, 20-50% of metallocene linear low density polyethylene MLLDPE and 2-20% of ethylene and alpha-olefin copolymer toughened resin.A manufacturing method of the stretching and winding film for automatic steel reel winding and packaging comprises the following steps of material selection and production.According to the stretching and winding film for automatic steel reel winding and packaging and the manufacturing method of the stretching and winding film, the film is high in strength and toughness and good in adhesiveness, the problem that a steel reel is damaged due to the low strength of a stretching and winding film, the problem that a steel reel incision is cracked due to the low toughness of the stretching and winding film and the problem that the steel reel sealing performance is poor due to the low adhesiveness of the stretching and winding film are solved, and the increasingly-stringent requirements of automatic steel reel winding and packaging are met.

Description

technical field [0001] The invention relates to the field of protective materials for automatic winding and packaging of cold-rolled plates and wire rods in the metallurgical industry, in particular to a stretch wrapping film for automatic winding and packaging of steel coils and a manufacturing method thereof. Background technique [0002] Packaging steel coils with stretch wrap film is a new type of steel coil packaging method developed in China in the last few years. Compared with the traditional use of composite anti-rust paper packaging steel coils, it has the advantages of automatic packaging, saving materials and manpower, The packaging is beautiful and the material can be 100% recycled. [0003] At present, the general stretch stretch film uses linear low-density polyethylene LLDPE as the base material and metallocene linear low-density polyethylene MLLDPE as the proportion and manufacture of reinforced plastics. This stretch stretch film has low yield strength and i...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a stretch wrapping film for automatic wrapping of steel coils and its manufacturing method, which has high strength, high toughness and good adhesion, and solves the problems caused by the low strength of the stretch wrapping film. The problem of steel coil damage, the problem of steel coil slit cracking due to low toughness, and the problem of poor sealing of steel coils due to low viscosity, meet the increasingly stringent requirements for automatic winding packaging of steel coils