A kind of stretch winding film for automatic winding and packaging of steel coil and its manufacturing method and process
The invention relates to the field of protective materials for automatic winding and packaging of cold-rolled sheet and wire rod in metallurgical industry, in particular to a tensile winding film for automatic winding and packaging of steel coil and its manufacturing method.
Background technology:
It is a new type of steel coil packaging method developed in China in recent years. Compared with the traditional composite antirust paper, it has the advantages of automatic packaging, saving materials and manpower, beautiful packaging and 100% recycling of materials. At present, linear low-density polyethylene (LLDPE) is used as the base material and Metallocene Linear Low-Density Polyethylene (mLLDPE) is used as the proportion and manufacture of reinforced plastics. The yield strength and puncture resistance of the tensile winding film are low. Even if the manufacturing process is strictly implemented, the yield strength of the tensile winding film can only reach 4.0-7.0mpa, and the puncture resistance strength is 15-25n In the process of packaging, the problem of steel coil breakage and coil incision cracking often occurs. This kind of tension winding film can not meet the requirements of the existing automatic coil winding packaging.
Technical implementation elements:
The technical problem to be solved by the invention is to provide a tension winding film for automatic winding and packaging of steel coil and its manufacturing method, which has high strength, high toughness and good adhesion, solves the problem of steel coil damage caused by low strength of tensile winding film, the problem of steel coil incision cracking caused by low toughness, and the problem of poor sealing performance of steel coil caused by low viscosity, so as to meet the requirements of automatic steel coil winding The increasingly strict requirements of winding packaging. In order to achieve the above purpose, the present invention proposes a kind of tension winding film for automatic winding and packaging of steel coil. The composition includes linear low-density polyethylene LLDPE, metallocene linear low-density polyethylene mLLDPE, ethylene and a-olefin copolymer toughening resin, and the weight percentage of each component is: lldpe30-60%, mLLDPE 20-50%, ethylene and a-olefin copolymer toughening resin 2-20%. The breaking strength, yield strength and puncture resistance of the film can reach more than 18 MPa, 8.0 MPa and 30 n respectively. The invention is further improved, in order to improve the viscosity of the tension winding film, the composition also includes tackifying masterbatch, and the tackifying masterbatch is polyisobutylene PIB or ultra-low density polyethylene vlldpe.
A kind of stretch winding film for automatic winding and packaging of steel coil and its manufacturing method and process Related Video:
Our advancement depends over the superior machines, exceptional talents and continually strengthened technology forces for Vci Paper In Ahmedabad , Rice Paper Sheets Coles , Daubert Nox Rust Vci-10 Msds , We have a professional sales team, they have mastered the best technology and manufacturing processes, have years of experience in foreign trade sales, with customers able to communicate seamlessly and accurately understand the real needs of customers, providing customers with personalized service and unique products.