Woven bag internally covering film

Abstract

The invention discloses a woven bag internally covering film. The internally covering film comprises the components by the weight percentage: 75%-85% of EVA 14-2; 15%-10% of LLDPE 18; 6%-3% of HDPE 9455; and 4%-2% of linear 7042 or 7047. The woven bag internally covering film can be directly internally adhered to woven cloth, replaces an internally covering film having a layer structure; and the woven bag internally covering film has smooth surface, has strong adhesion ability on the woven cloth, and reduces the manufacturing cost of a woven bag with the internally covering film.

Description

technical field [0001] The invention relates to a plastic film material, in particular to a film material for covering the inner surface of a woven bag. Background technique [0002] The inner film woven bag is widely used in chemical industry, agriculture, food, cement and other industries. It not only inherits the advantages of high tensile strength of woven bag, but also has good air tightness and moisture resistance of film bag. It is a typical composite bag. Packaging Materials. In particular, the inner film-coated woven bag made of cylindrical woven cloth as the base cloth has strong breaking resistance, good air tightness, moisture-proof, hard-to-fall-off film, strong ability to withstand internal air pressure, and no longer has an ugly appearance. The outer woven bag has the advantages of existing ruffles and undamaged strength, and fundamentally solves the original process of manually turning the bag. [0003] In the prior art, the inner layer film material used t...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the inner layer film material used to produce the inner film woven bag mostly adopts a 2-layer or 3-layer structure. The purpose is to make the film material have a smooth inner surface and be firmly attached to the woven base fabric. , CN 202742779 U discloses a composite woven bag film, the composite woven bag film body includes an A surface layer, a core layer, and a B surface layer, and the A surface layer, the core layer, and the B surface layer are sequentially stacked and co-extruded. Although the bag film material of this structure solves the problems of inner film strength, antistatic ability and inner film adhesion, it needs to use multi-die co-extrusion in the production process to form the film body, and the price of multi-die co-extrusion equipment Higher, which increases the manufacturing cost of the inner film woven bag

In addition, in order to ensure the integrity of the three-layer structure and the uniformity of the three-layer materials, the thickness of the film with this layered structure is also limited, so it cannot be used as an inner covering film for a thinner inner covering film woven bag.