CN219191556U

CN219191556U - Polypropylene film with high ductility

Info

Publication number: CN219191556U
Application number: CN202223124085.3U
Authority: CN
Inventors: 吕达民
Original assignee: Quanzhou Lichang New Material Technology Co ltd
Current assignee: Quanzhou Lichang New Material Technology Co ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-06-16
Anticipated expiration: 2032-11-24

Abstract

The utility model discloses a high-ductility polypropylene film, which comprises a polypropylene film layer, wherein the upper surface and the lower surface of the polypropylene film layer are both connected with an elastic layer, and the other surface of the elastic layer is provided with an anti-scratch layer; the anti-scratch layer and the elastic layer are adhered into a whole through the weft threads and the warp threads, and the anti-scratch layer and the elastic layer are adhered into a whole through the weft threads and the warp threads, so that the excellent performance of biaxial stretching of the film is ensured, and meanwhile, the strength and the high extensibility of the film are improved; through the design of the contraction part on the polypropylene film layer, the internal stress in the rigid substance can be effectively buffered and absorbed, so that the internal stress between films is absorbed, the service life of the film is further prolonged, the scratch-resistant layer is arranged for surface protection, the appearance is beautified, and the influence of film oxidation on the service life of the film is prevented.

Description

Polypropylene film with high ductility

Technical Field

The utility model relates to the technical field of films, in particular to a high-ductility polypropylene film.

Background

With the continuous development of industry, the polymer materials are gradually applied to various fields, and the requirements of the various fields on the performance of the polymer materials are continuously improved. Polypropylene is a polymer with large industrial yield, has the advantages of light weight, easy processing, good chemical stability and the like, and is widely applied to the fields of electronic products, automobile parts, packaging materials and the like, however, the structure of polypropylene in the existing market is still too simple, and the ductility is still to be further improved.

Disclosure of Invention

The present utility model is directed to a polypropylene film with high ductility to solve the above-mentioned problems of the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the high-ductility polypropylene film comprises a polypropylene film layer, wherein the upper surface and the lower surface of the polypropylene film layer are connected with elastic layers, and an anti-scratch layer is arranged on the other surface of the elastic layers; the anti-scratch layer and the elastic layer are coated with an adhesive layer, the adhesive layer comprises a plurality of wefts and a plurality of warps which are distributed along the horizontal direction, the wefts and the warps are mutually staggered and adhered to form a grid-shaped structure, and the anti-scratch layer and the elastic layer are adhered to each other through the wefts and the warps into a whole.

Furthermore, the polypropylene film layer is provided with a plurality of shrinkage parts at equal intervals along the horizontal direction, and gaps are formed between the upper and lower shrinkage sides of the shrinkage parts and the elastic layer.

Further, the shrinkage part is formed by pressing the upper and lower surfaces of the polypropylene film layer inwards towards the middle through a mould pressing process.

Further, a plurality of wefts and a plurality of warps are uniformly distributed at equal intervals, the distance between any two adjacent wefts is equal to the distance between any two adjacent warps, and the joint of the wefts and the warps is of a diamond-shaped structure.

Further, the thickness of the polypropylene film layer is larger than the thickness of the elastic layer and the thickness of the scratch-resistant layer.

Further, the elastic layer thickness is greater than the scratch-resistant layer thickness.

Furthermore, the elastic layer is made of polyurethane materials.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, through the internal and external adhesive layers, the excellent bidirectional stretching performance of the film is ensured, and meanwhile, the strength and high extensibility of the film are improved; through the design of the contraction part on the polypropylene film layer, the internal stress in the rigid substance can be effectively buffered and absorbed, so that the internal stress between films is absorbed, the service life of the film is further prolonged, the scratch-resistant layer is arranged for surface protection, the appearance is beautified, and the influence of film oxidation on the service life of the film is prevented.

Drawings

FIG. 1 is a schematic view of the structure of a high ductility polypropylene film of the present utility model;

FIG. 2 is a top view of an adhesive layer of a high ductility polypropylene film of the present utility model.

In the figure, a polypropylene film layer-1, an elastic layer-2, a scratch-resistant layer-3, an adhesive layer-4, wefts-41, warps-42 and contractions-5.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 and 2, a high-ductility polypropylene film comprises a polypropylene film layer 1, wherein the upper surface and the lower surface of the polypropylene film layer 1 are connected with an elastic layer 2, and the other surface of the elastic layer 2 is provided with an scratch-resistant layer 3; an adhesive layer 4 is coated between the scratch-resistant layer and the elastic layer 2, the adhesive layer 4 comprises a plurality of wefts 41 and a plurality of warps 42 which are distributed along the horizontal direction, the wefts 41 and the warps 42 are mutually staggered and adhered to form a grid-shaped structure, and the scratch-resistant layer and the elastic layer 2 are adhered to form a whole through the wefts 41 and the warps 42.

In this embodiment, the polypropylene film layer 1 is provided with a plurality of shrinkage portions 5 at equal intervals along the horizontal direction, and a gap is formed between the elastic layer 2 and the upper and lower shrinkage sides of the shrinkage portions 5, wherein the shrinkage portions 5 are formed by pressing the upper and lower surfaces of the polypropylene film layer 1 inwards in the middle through a die pressing process, and the shrinkage portions 5 are designed such that the film always maintains a certain buffering capacity and a certain spatial range of film expansion in long-term use.

In this embodiment, the plurality of wefts 41 and the plurality of warps 42 are uniformly distributed at equal intervals, the interval between any two adjacent wefts 41 is equal to the interval between any two adjacent warps 42, the joint of the wefts 41 and the warps 42 is in a diamond-shaped structure, the honeycomb structure can improve the connection strength between the film layers, and the staggered grid heat welding on the two-dimensional plane has the characteristics of auxetic.

In this embodiment, the thickness of the polypropylene film layer 1 is greater than the thickness of the elastic layer 2 and the thickness of the scratch-resistant layer 3; the thickness of the elastic layer 2 is larger than that of the scratch-proof layer 3.

In this embodiment, the elastic layer 2 is made of polyurethane.

The working principle of the embodiment is as follows:

when the polypropylene film layer 1 with the intermittent shrinkage structure serving as the middle layer is subjected to external transverse tension, extension reaction can be carried out, so that the problem that the traditional film is easy to break during extension is avoided; the outer elastic layer 2 can stretch along with the polypropylene film layer 1, can serve as a protection function to reduce the ageing speed of the polypropylene film layer 1, prolongs the service life, improves the shear modulus, notch resistance, fracture resistance and rebound toughness of the film by utilizing the stretching and expanding characteristics of grid bonding, and protects the surface through the scratch-resistant layer 3, beautifies the appearance and prolongs the service life.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. A high ductility polypropylene film comprising a polypropylene film layer characterized in that: the upper surface and the lower surface of the polypropylene film layer are connected with elastic layers, and the other surface of the elastic layers is provided with scratch-resistant layers;

the anti-scratch layer and the elastic layer are coated with an adhesive layer, the adhesive layer comprises a plurality of wefts and a plurality of warps which are distributed along the horizontal direction, the wefts and the warps are mutually staggered and adhered to form a grid-shaped structure, and the anti-scratch layer and the elastic layer are adhered to each other through the wefts and the warps into a whole.

2. A high ductility polypropylene film according to claim 1, wherein: the polypropylene film layer is provided with a plurality of shrinkage parts at equal intervals along the horizontal direction, and gaps are reserved between the upper and lower shrinkage sides of the shrinkage parts and the elastic layer.

3. A high ductility polypropylene film according to claim 1, wherein: the plurality of wefts and the plurality of warps are uniformly distributed at equal intervals, the distance between any two adjacent wefts is equal to the distance between any two adjacent warps, and the joint of the wefts and the warps is of a diamond-shaped structure.

4. A high ductility polypropylene film according to claim 1, wherein: the thickness of the polypropylene film layer is larger than that of the elastic layer and that of the scratch-resistant layer.

5. The high ductility polypropylene film according to claim 4, wherein: the thickness of the elastic layer is larger than that of the scratch-proof layer.

6. A high ductility polypropylene film according to claim 1 or 5, wherein: the elastic layer is made of polyurethane materials.