CN217892141U

CN217892141U - Composite sheet material with single material structure and easy to take off

Info

Publication number: CN217892141U
Application number: CN202221400434.7U
Authority: CN
Inventors: 罗文汉; 姚奇; 王广宁; 劳春辉
Original assignee: Guangzhou Profel Film Co ltd
Current assignee: Guangzhou Profel Film Co ltd
Priority date: 2022-06-06
Filing date: 2022-06-06
Publication date: 2022-11-25
Anticipated expiration: 2032-06-06

Abstract

The utility model discloses a single material structure easily takes off composite sheet, including printing in the ink layer, glue layer and easily take off the membrane, the ink layer is established on printing in the ink layer, and printing in the ink layer passes through the glue layer and easily takes off the membrane complex, and the ink layer is located printing in the ink layer and easily takes off between the membrane, and printing in the ink layer is the same with the material of easily taking off the membrane, and easily take off the membrane for crowded membrane altogether. The printing film and the easy-uncovering film are made of the same material, have the same melting point and are easy to recycle and reuse; the printing film and the easy-to-tear film can be prepared by one-time compounding, and compared with the existing blister sheet packaging which needs two times of compounding, the production efficiency is greatly improved; the easily-torn film is a co-extruded film extruded at one time, has no delamination risk, improves the easily-torn wiredrawing phenomenon, and has better flatness control.

Description

Composite sheet material with single material structure and easy to take off

Technical Field

The utility model relates to a food package field especially relates to a composite sheet is easily taken off to single material structure.

Background

At present, due to the rise of western dairy products such as cheese and snacks in the market, the demand of blister sheet packaging of products such as cheese sticks, chocolate eggs and the like is greatly increased, and a three-layer dry-type composite structure, namely a printing layer/middle layer/heat sealing layer, is usually used in the blister sheet packaging at present, wherein the printing layer is a printing film with certain printing dimensional stability, the middle layer is a thick sheet made of PS or PVC material and mainly plays a supporting role, and the inner layer is a PE heat sealing layer with an easy-to-tear function and is bonded with the layers through polyurethane glue.

Because the existing blister sheet package is of a structure compounded by multiple materials, the melting points of the materials are different, the materials cannot be recycled as a single material, namely, the materials are difficult to uniformly recycle, and the sheet made of the PVC material contains a plurality of additives, is harmful to the environment and personal safety after being combusted, and does not meet the requirement of environmental protection; in addition, the structure is a multi-material composite structure, two times of glue compounding are needed in the production process, the production flow is complex, time-consuming and high in cost, and particularly when the process control is not proper, the inner heat sealing layer and the printing layer are in risk of being layered with the sheet, so that the wire drawing phenomenon is easy to occur when the inner heat sealing layer and the printing layer are uncovered.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a composite sheet is easily taken off to single material structure to solve the one or more technical problem that exist in the above-mentioned background art.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a composite sheet is easily taken off to single material structure, includes printing on film, printing ink layer, glue layer and easily takes off the membrane, the printing ink layer is established on the printing on film, the printing on film pass through the glue layer with easily take off the membrane complex, the printing ink layer is located the printing on film with easily take off between the membrane, the printing on film with easily take off the material of membrane the same, easily take off the membrane and be crowded membrane altogether.

Preferably, the printing film is a biaxially oriented polypropylene film or a cast polypropylene film, and the easy-uncovering film is a polypropylene co-extrusion film.

Preferably, the printing film comprises a printing surface layer, a printing middle layer and a printing inner layer which are arranged in sequence, the printing surface layer, the printing middle layer and the printing inner layer are respectively a biaxially oriented polypropylene co-extruded film layer or a cast polypropylene co-extruded film layer, and the ink layer is arranged on the printing inner layer.

Preferably, the easy-to-tear film comprises a non-easy-to-tear surface layer, a non-easy-to-tear middle layer and an easy-to-tear inner layer which are sequentially arranged, and the non-easy-to-tear surface layer, the non-easy-to-tear middle layer and the easy-to-tear inner layer are polypropylene co-extrusion film layers.

Preferably, the thickness of the easy-uncovering film is 100-350 μm.

Preferably, the thickness of the biaxially oriented polypropylene film is 15 to 38 μm.

Preferably, the cast polypropylene film has a thickness of 25 to 60 μm.

The utility model has the advantages that: the printing film and the easy-uncovering film are made of the same material, have the same melting point and are easy to recycle and reuse; the printing film and the easy-to-tear film can be prepared by one-time compounding, and compared with the existing blister sheet packaging which needs two times of compounding, the production efficiency is greatly improved; the easily-torn film is a co-extruded film extruded at one time, has no delamination risk, improves the easily-torn wiredrawing phenomenon, and has better flatness control.

Drawings

The accompanying drawings are provided to further illustrate the present invention, but the content in the accompanying drawings does not constitute any limitation to the present invention.

FIG. 1 is a schematic diagram of the internal structure of a single-layer extruded printing film according to one embodiment of the present invention;

fig. 2 is a schematic diagram of the internal structure of the printing film of one embodiment of the present invention, which is a three-layer extrusion.

Wherein: the printing film comprises a printing film 1, an ink layer 2, a glue layer 3, an easy-to-tear film 4, a printing surface layer 13, a printing middle layer 12, a printing inner layer 11, a non-easy-to-tear surface layer 43, a non-easy-to-tear middle layer 42 and an easy-to-tear inner layer 41.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the drawings.

The composite sheet material is easily torn off to single material structure of this embodiment, refer to fig. 1, including bearing printing film 1, printing ink layer 2, glue layer 3 and easily tear off membrane 4, printing ink layer 2 is established on bearing printing film 1, and bearing printing film 1 is through glue layer 3 and easily tear off the membrane 4 complex, and printing ink layer 2 is located bearing printing film 1 and easily tears off between the membrane 4, and bearing printing film 1 is the same with the material of easily tearing off membrane 4, easily tears off membrane 4 for crowded membrane altogether.

The printing film 1 and the easy-to-uncover film 4 are made of the same material, have the same melting point and are easy to recycle and reuse; during production, gravure or flexible plate printing is carried out on the surface of the printing film 1 to form an ink layer 2, the ink layer is compounded and cured with the easy-to-tear film 4 after printing, and the ink layer can be prepared by only one-time compounding; the ink layer 2 is positioned between the printing film 1 and the easy-to-uncover film 4, so that the printing film 1 can protect the ink layer 2; the easily-torn film 4 is a co-extruded film extruded at one time, has no delamination risk, improves the phenomenon of easily-torn wire drawing, and has better flatness control.

Preferably, the printing film 1 is a single-layer extruded or three-layer co-extruded biaxially oriented polypropylene film (BOPP) or a single-layer extruded or three-layer co-extruded cast polypropylene film (CPP), and the easy-to-tear film 4 is a polypropylene co-extruded film. Therefore, the printing film 1 and the peeling film 4 are both made of polypropylene (PP), are environment-friendly and recyclable by adopting a single material, are healthy and sanitary, meet the requirements of food packaging, and can replace non-environment-friendly sheets made of PVC materials without high barrier function. The composite sheet of the embodiment has certain barrier property, and can be applied to chocolate eggs or outer packages of dairy products and jelly with low barrier property requirements.

Preferably, referring to fig. 2, the printing film 1 includes a printing surface layer 13, a printing middle layer 12 and a printing inner layer 11, which are sequentially disposed, the printing surface layer 13, the printing middle layer 12 and the printing inner layer 11 are all biaxially oriented polypropylene co-extruded film layers or cast polypropylene co-extruded film layers, and the ink layer 2 is disposed on the printing inner layer 11. From this, bear printing membrane 1 can adopt CPP coextruded film or BOPP coextruded film, extrudes CPP coextruded film or BOPP coextruded film who forms through adopting the three-layer, has reduced manufacturing cost, and changes the control roughness.

Preferably, the easy-to-tear film 4 comprises a non-easy-to-tear surface layer 43, a non-easy-to-tear middle layer 42 and an easy-to-tear inner layer 41 which are sequentially arranged, and the non-easy-to-tear surface layer 43, the non-easy-to-tear middle layer 42 and the easy-to-tear inner layer 41 are polypropylene co-extruded film layers. Therefore, the easy-to-tear film 4 adopts a three-layer co-extruded polypropylene co-extruded film, so that the production cost is reduced, the layering phenomenon can be avoided, the easy-to-tear inner layer 41 has a good effect of easily tearing off the seal, the tearing force is stable, and the peeling interface is clean and has no wire drawing phenomenon.

Preferably, the thickness of the easy-uncovering film 4 is 100-350 μm. Ensures the effect of easy uncovering of the seal and plays a role in supporting the printing film 1.

Preferably, the biaxially oriented polypropylene film has a thickness of 15 to 38 μm. The cast polypropylene film with corresponding thickness is arranged, so that the printing size stability of the printing film 1 is ensured.

Preferably, the cast polypropylene film has a thickness of 25 μm to 60 μm. The biaxially oriented polypropylene film with the corresponding thickness is arranged, so that the printing size stability of the printing film 1 is ensured.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive step, and these embodiments are all intended to fall within the scope of the present invention.

Claims

1. The utility model provides a composite sheet is easily taken off to single material structure which characterized in that, is including printing-on film, printing ink layer, glue layer and easily take off the membrane, the printing ink layer is established on the printing-on film, printing-on film pass through the glue layer with easily take off the membrane complex, the printing ink layer is located printing-on film with easily take off between the membrane, printing-on film with easily take off the material of membrane the same, easily take off the membrane and be crowded membrane altogether.

2. The easy-to-tear composite sheet with a single material structure as claimed in claim 1, wherein the printing film is a biaxially oriented polypropylene film or a cast polypropylene film, and the easy-to-tear film is a polypropylene co-extruded film.

3. The easy-to-tear composite sheet material with a single material structure as claimed in claim 1, wherein the printing film comprises a printing surface layer, a printing middle layer and a printing inner layer, the printing surface layer, the printing middle layer and the printing inner layer are biaxially oriented polypropylene co-extruded film layer or cast polypropylene co-extruded film layer, and the ink layer is disposed on the printing inner layer.

4. The composite sheet material of claim 1, wherein the release film comprises a non-release surface layer, a non-release middle layer and a release inner layer, and the non-release surface layer, the non-release middle layer and the release inner layer are co-extruded polypropylene layers.

5. The release composite sheet material of claim 1, wherein the release film has a thickness of 100 μm to 350 μm.

6. The easy-release composite sheet material with a single material structure as claimed in claim 2, wherein the thickness of the biaxially oriented polypropylene film is 15 μm to 38 μm.

7. The release composite sheet of claim 2, wherein the cast polypropylene film has a thickness of 25 μm to 60 μm.