CN215512687U

CN215512687U - Solvent-free composite barrier sheet and container

Info

Publication number: CN215512687U
Application number: CN202122106340.0U
Authority: CN
Inventors: 周世革
Original assignee: Suzhou Fenglian Industrial Co ltd
Current assignee: Suzhou Fenglian Industrial Co ltd
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2022-01-14
Anticipated expiration: 2031-09-02

Abstract

The utility model belongs to the technical field of packaging containers, and particularly relates to a solvent-free composite barrier sheet which comprises a plastic sheet, film surface layers and an EVOH layer, wherein the plastic sheet is used for the lower surface layer of the sheet, the film surface layers are used for the upper surface layer of the sheet, the film surface layers are of a two-layer structure, the EVOH layer is clamped between the two film surface layers, and the film surface layers and the EVOH layer are connected to the surface of the plastic sheet through solvent-free glue after being formed; according to the utility model, a common sheet is compounded with a film with barrier property by a solvent-free compounding technology, so that the barrier property of the product is endowed. A plastic sheet as a substrate was prepared. And placing the sheet roll in an unwinding position of a solvent-free compound machine, and placing the barrier film in the other unwinding position. Compounding the sheet and the barrier film into a membrane material with a multilayer structure through solvent-free compounding; has low processing cost, and the common material has oxygen barrier property after being processed by lamination.

Description

Solvent-free composite barrier sheet and container

Technical Field

The utility model belongs to the technical field of packaging containers, and particularly relates to a solvent-free composite barrier sheet and a container.

Background

With the development of times and the improvement of living standard, people have more and more demands on barrier packaging. The packaging industry has developed rapidly due to its ability to protect and stabilize products for long periods of time, as well as to protect the products from damage, contamination, and moisture. To achieve the best protection effect, materials with high barrier property are necessarily selected; from a broad perspective, barrier packaging has been in use for many years. Barrier packaging is intended to protect products and contents from the penetration of contaminants, flavors, colors, odors, and sometimes to prevent the penetration of contents

1. The oxygen barrier property and the requirement of diversified package barrier cannot be achieved by common single materials.

2. The composite extrusion sheet has high investment cost on equipment and high difficulty on technical requirements. The barrier sheet is also higher in processing difficulty than the ordinary sheet.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides a solvent-free composite barrier sheet and a container, which have the characteristic of enabling the package to have a barrier effect.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a solvent-free composite separation sheet, includes plastic sheet, film superficial layer and EVOH layer, the plastic sheet is used for the lower surface course of sheet, the upper surface course that the film superficial layer was used for, the film superficial layer is two-layer structure, the EVOH layer centre gripping is in two between the film superficial layer, connect the surface at the plastic sheet through solvent-free glue after film superficial layer and the EVOH layer shaping.

In a preferred embodiment of the solvent-free composite barrier sheet and the container of the present invention, the film surface layer and the EVOH layer are distributed in an ABA structure.

As a preferable technical scheme of the solvent-free composite barrier sheet and the container, the film surface layer and the EVOH layer are formed in a co-extrusion mode.

In a preferred embodiment of the solvent-free composite barrier sheet and the container of the present invention, the film surface layer and the EVOH layer are formed and then adhered to the plastic sheet by a solvent-free composite machine and a solvent-free glue to form a sheet.

The utility model also provides a solvent-free composite container which is made of the solvent-free composite barrier sheet and comprises a packaging box, wherein the packaging box is of a rectangular structure, and the upper end of the packaging box is provided with an expanding opening.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, a common sheet is compounded with a film with barrier property by a solvent-free compounding technology, so that the barrier property of the product is endowed. A plastic sheet as a substrate was prepared. And placing the sheet roll in an unwinding position of a solvent-free compound machine, and placing the barrier film in the other unwinding position. Compounding the sheet and the barrier film into a membrane material with a multilayer structure through solvent-free compounding; has low processing cost, and the common material has oxygen barrier property after being processed by lamination.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic structural view of a sheet prepared according to the present invention;

FIG. 2 is a schematic bottom view of the present invention;

FIG. 3 is a schematic structural view of a front view of the present invention;

FIG. 4 is a side view of the present invention;

in the figure: 1. packaging boxes; 2. a plastic sheet; 3. solvent-free glue; 4. a thin film surface layer; 5. an EVOH layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1-4, the present invention provides the following technical solutions: a solvent-free composite barrier sheet comprises a plastic sheet 2, a film surface layer 4 and an EVOH layer 5, wherein the plastic sheet 2 is used for the lower surface layer of the sheet, the film surface layer 4 is used for the upper surface layer, the film surface layer 4 is of a two-layer structure, the EVOH layer 5 is clamped between the two film surface layers 4, the film surface layer 4 and the EVOH layer 5 are connected to the surface of the plastic sheet 2 through solvent-free glue 3 after being formed, and in the embodiment, a common sheet and a film with barrier property are composited through a solvent-free composite technology to endow the barrier property to a product. A plastic sheet as a substrate was prepared. And placing the sheet roll in an unwinding position of a solvent-free compound machine, and placing the barrier film in the other unwinding position. Compounding the sheet and the barrier film into a membrane material with a multilayer structure through solvent-free compounding; the processing cost is low, and the common material has oxygen barrier property after being processed by compounding; the plastic sheet 2 is a PP sheet.

Specifically, the film surface layer 4 and the EVOH layer 5 are distributed in an ABA structure, and in this embodiment, the film surface layer 4 is made of a common material, such as PE, PP, PS, PET, or the like.

Specifically, the film surface layer 4 and the EVOH layer 5 are formed by co-extrusion, in this embodiment, the EVOH layer 5 combines the processability of the ethylene polymer and the barrier effect of the vinyl alcohol polymer, and the ethylene-vinyl alcohol copolymer not only shows excellent processability, but also shows excellent barrier effect on gas, smell, perfume, solvent and the like; multilayer containers containing EVOH barrier layers are fully recyclable due to their thermal stability in combination with ethylene.

Specifically, the film surface layer 4 and the EVOH layer 5 are molded and then adhered to the plastic sheet 2 by a solvent-free laminator and a solvent-free glue 3 to form a sheet.

The utility model also provides a solvent-free composite container which is made of the solvent-free composite barrier sheet and comprises a packaging box 1, wherein the packaging box 1 is of a rectangular structure, and the upper end of the packaging box 1 is provided with an expanding opening

The working principle and the using process of the utility model are as follows: and (3) extruding the mixture through an extruder to prepare the PP sheet. Such sheets may have one or more properties such as cold resistance, transparency, antifog properties, and the like. 3 layers of EVOH co-extruded film are adopted, the middle layer is made of EVOH material, and the upper surface layer and the lower surface layer are made of other general materials such as (PE, PP, PS, PET and the like). And placing the coiled materials of the sheet and the barrier film in an unreeling station of a solvent-free compound machine, and compounding the coiled materials of the sheet and the barrier film into the composite material with a film structure through solvent-free glue. And then forming the mixture into a package box.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A solventless composite barrier sheet characterized by: the plastic sheet comprises a plastic sheet (2), a film surface layer (4) and an EVOH layer (5), wherein the plastic sheet (2) is used for the lower surface layer of the sheet, the film surface layer (4) is used for the upper surface layer, the film surface layer (4) is of a two-layer structure, the EVOH layer (5) is clamped between the two film surface layers (4), and the film surface layer (4) and the EVOH layer (5) are connected to the surface of the plastic sheet (2) through solvent-free glue (3) after being formed.

2. The solventless composite barrier sheet of claim 1 wherein: the film surface layer (4) and the EVOH layer (5) are distributed in an ABA structure.

3. The solventless composite barrier sheet of claim 1 wherein: the film surface layer (4) and the EVOH layer (5) are formed in a co-extrusion mode.

4. The solventless composite barrier sheet of claim 1 wherein: and after the film surface layer (4) and the EVOH layer (5) are molded, adhering the molded film surface layer and the EVOH layer to a plastic sheet (2) by using a solvent-free compounding machine and solvent-free glue (3) to form the sheet.

5. A solventless composite container characterized by: made with a solventless composite barrier sheet according to any one of claims 1-4, comprising a package (1), said package (1) having a rectangular configuration and an upper end provided with an expanding opening.