A kind of high heat-sealing strength puncture-resistant BOPP film and preparation method thereof

Abstract

The invention discloses a puncture-resistant BOPP film with high heat-sealing strength, which is sequentially composed of a corona layer, a core layer and a heat-sealing layer; 2-5 parts of masterbatch A; the raw materials of the anti-adhesive masterbatch A are composed of 30-50 parts of random silica and 50-70 parts of homopolypropylene; the raw materials of the core layer are composed of 50-70 parts by weight It is composed of 80-85 parts of homopolypropylene, 1-5 parts of erucamide slip agent and 10-15 parts of SBS styrene thermoplastic elastomer; the raw material of the heat-sealing layer is composed of metallocene ternary 70-80 parts of polypropylene copolymer, 20-25 parts of linear low density polyethylene and 2-6 parts of anti-adhesive masterbatch B; the raw materials of described anti-adhesive masterbatch B are composed of 40-60 parts of glass beads and It consists of 40‑60 parts of binary copolymerized polypropylene. The invention also discloses a preparation method of the above-mentioned BOPP film.

Description

technical field [0001] The invention relates to the technical field of BOPP films, in particular to a puncture-resistant BOPP film with high heat-sealing strength and a preparation method thereof. Background technique [0002] In the fields of food, medicine, especially heavy and rigid packaging, it is difficult for traditional packaging films to meet the requirements of high-strength heat sealing and puncture resistance. At present, most of the common packages on the market are: OPP / LLDPE, NY / LLDPE, PET / CPP, PET / VMPET / CPP, PET / NY / CPP and other structures. There are several problems in this kind of packaging: (1) The impact resistance of packaging bags is poor, and they are easily damaged by external forces during transportation, loading and unloading, and shelf placement. (2) The smoothness of the packaging bag itself is not good, and the opening performance is poor during the production process, and the production efficiency is low. At the same time, it will also reduce t...

AI Technical Summary

Problems solved by technology

[0002] In the fields of food, medicine, especially heavy and rigid packaging, it is difficult for traditional packaging films to meet the requirements of high-strength heat sealing and puncture resistance

At present, most of the common packages on the market are: OPP / LLDPE, NY / LLDPE, PET / CPP, PET / VMPET / CPP, PET / NY / CPP and other structures. There are several problems in this kind of packaging: (1) The impact resistance of packaging bags is poor, and they are easily damaged by external forces during transportation, loading and unloading, and shelf placement. (2) The smoothness of the packaging bag itself is not good, and the opening performance is poor during the production process, and the production efficiency is low. At the same time, it will also reduce the utilization rate of the packaging bag and cause waste of cost; (3) Ordinary The heat-sealing strength of the packaging bag is less than 20N / 15mm. When the heat-sealing temperature is too high, it is easy to cause damage to the heat-sealing layer, resulting in a decrease in the protection performance of the packaging bag, and the shelf life of the contents is greatly shortened, so that the contents cannot reach the corresponding Shelf life; (4) The interlayer peel strength of the packaging bag is less than 1.0N / 15mm, so the breaking force is not enough, the mechanical properties of the packaging bag are poor, the packaging bag is layered, and the packaging bag cannot achieve the proper load-bearing effect, which will damage the contents. It cannot play an effective protective role; (5) The puncture performance of the packaging bag is less than 1.0N / μm, and for fish and meat products, which contain bones and hard objects, the extrusion of the product during transportation and stacking can easily make the packaging bag puncture , causing damage to the sealing of the packaging bag, so the puncture performance of the packaging bag is very high; (6) The composite processing process of packaging materials involves solvents and glue, which has certain pollution to the environment and does not comply with the green packaging industry policy

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