Film with high tensile strength and production method

Abstract

The invention relates to a film with high tensile strength. The film is a seven-layer compound film. The film comprises a layer A, a layer B, a layer C, a layer D, a layer E, a layer F and a layer G from outer to inner starting from the cross section of the film, wherein the layer A is composed of a blending modified resin of metallocene polyethylene and ethylene modified PET; the layer B is madefrom graphene oxide modified low-density polyethylene; the layer C is made from maleic anhydride grafted low-density polyethylene; the layer D is made from ultra-high molecular weight polyethylene; the layer E is made from maleic anhydride grafted low-density polyethylene; the layer F is made from graphene oxide modified low-density polyethylene; the layer G is made from polyvinylidene fluoride. Compared with a common film, the film with high tensile strength provided by the invention has higher strength, no spreading of damaged holes, higher surface viscosity and higher tensile strength, so that the film with high tensile strength can be applied to special occasions.

Description

technical field [0001] The invention relates to the field of film technology, in particular to a high tensile film and a production method. Background technique [0002] The types of film include single-layer film, composite film and co-extrusion film. The disadvantages of single-layer film such as low mechanical strength and surface hardness, flammability and poor heat resistance limit its application range, and the market for co-extrusion film is relatively broad. Among them, the multi-layer co-extrusion technology is to use more than 3 extruders to melt and extrude resin materials with different functions, such as PA, PE, PP, etc. Bulge forming, cooling and compounding to make multi-layer composite film. [0003] The film produced by the multi-layer co-extrusion method can well meet the needs of various industrial packaging, and has the incomparable advantages of the dry composite film. By adjusting the thickness of each layer and using a variety of different materials, ...

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Problems solved by technology

For example, the Chinese patent application number CN201310637906.X discloses a high-tensile plastic film, which adopts a three-layer structure, in which the middle grid-like reinforcement layer is made of carbon fibers and cotton fibers interwoven through warp and weft threads, so as to achieve high tensile strength. For the purpose of tensile strength, this patent uses carbon fiber and cotton fiber as the reinforcing layer material. When it is applied to special occasions such as irregular objects and many water chestnuts, it is easy to cause problems such as local fiber breakage and puncture, and because the materials of the fiber and the film layer are different. , resulting in insufficient bonding force, and the difference in mechanical properties will cause the film to break and cannot be used normally

The Chinese patent application number CN201110367058.6 discloses a barrier biaxially stretched polylactic acid composite film and its preparation method. The patented film consists of two polylactic acid layers and a barrier layer between the two polylactic acid layers. , good biodegradability, but the tensile film made of this material has a brittle texture and poor processing performance, and it also cannot meet the packaging needs of special occasions such as irregular items and many water chestnuts.

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