WO2019085375A1

WO2019085375A1 - Universal easy-to-tear thin film and processing method and production line therefor

Info

Publication number: WO2019085375A1
Application number: PCT/CN2018/080215
Authority: WO
Inventors: 陈煜旸
Original assignee: 陈煜旸
Priority date: 2017-11-03
Filing date: 2018-03-23
Publication date: 2019-05-09
Also published as: AU2018360121A1; CN109968753A

Abstract

Disclosed is a universal easy-to-tear thin film, comprising from top to bottom an easy-to-tear film layer, an adhesive layer and an inner surface layer in sequence, wherein the easy-to-tear film layer is a BOPE film, the inner surface layer is a VMPE film, and a top face of the easy-to-tear film layer is provided with multiple recesses. A processing method for the universal easy-to-tear thin film comprises the steps of: a. pressing out multiple recesses on a top face of an easy-to-tear film layer; and b. combining a bottom face of the easy-to-tear film layer with an inner surface layer. A production line therefor comprises a first unwinding mechanism, a second unwinding mechanism, a combining mechanism and a winding mechanism in sequence, wherein a recess forming mechanism is provided between the first unwinding mechanism and the combining mechanism. Since the multiple recesses are formed on the top face of the easy-to-tear film layer, the universal easy-to-tear thin film can be easily torn in any direction by a user; and since the easy-to-tear film layer is a BOPE film and the inner surface layer is a VMPE film, the universal easy-to-tear thin film can be recycled and reused after use, thereby greatly reducing an adverse impact on the environment.

Description

Universal easy tear film, processing method and production line thereof

[Technical Field]

The invention relates to a universal easy tear film, in particular to a universal easy tear film, a processing method thereof and a production line.

【Background technique】

At present, the packaging of many materials (mainly powders, liquids), especially the packaging of a small amount of materials, in order to facilitate the user to open, has a tear seam on one side of the package. However, although this design solves the problem of opening the package, the easy-to-tear seam restricts the position where the user opens the package, and the easy-to-tear seam may cause the package to leak once the position is deviated.

For this reason, there have been developed easy-to-tear composite films of various materials, but these easily peelable composite films are not recyclable due to the materials used, and therefore, once used, they are contaminated by the environment.

[Summary of the Invention]

The technical problem to be solved by the present invention is to provide a universal easy tear film which allows the user to tear the package at any position and can be recycled and reused after use. The technical solutions adopted are as follows:

A universal easy tear film comprising: an easy tear film layer, a binder layer and an inner surface layer in order from top to bottom; the easy tear film layer is a BOPE film (biaxially stretched polyethylene film), The inner surface layer is a VMPE film, and the top surface of the easy tear film layer has a plurality of pits. The BOPE is an abbreviation of Biaxially Oriented Polyethylene, which is a biaxially stretched polyethylene film, which is formed by using PE raw materials and longitudinally stretching in the longitudinal direction and the transverse direction, and the polyethylene film produced by the original blow molding or casting method is in physical form. The performance is greatly improved, the transparency is high, the heat sealing property, the moisture resistance is good, the tensile strength in the longitudinal and transverse directions is good, and the advantages of moisture resistance and foldability are obtained. Especially in the case of a 50% reduction in thickness, the key properties still reach the performance of other polyethylene films. The VMPE refers to a polyethylene aluminized film (VMPE). The polyethylene aluminized film has both the properties of a plastic film and the properties of a metal. The surface of the film is coated with aluminum to prevent light and ultraviolet radiation, which not only prolongs the shelf life of the content, but also improves the brightness of the film. It replaces the aluminum foil to a certain extent, and has the advantages of low cost, good appearance and good barrier property. Polyethylene aluminized film is widely used in composite packaging. It is mainly used in dry and puffed food packaging such as biscuits and on the outer packaging of some medicines and cosmetics.

Preferably, the plurality of dimples are covered with the top surface of the easy-to-peel film layer, and the plurality of dimples are uniformly distributed on the top surface of the easy-to-peel film layer.

More preferably, the pit has a pore diameter of 0.06-1 μm and the pit has a density of 2000-6000/cm 2 (that is, 2000-6000 pits per square centimeter), and the depth of the pit is 1-20 microns.

Preferably, the easy-to-tear film layer has a thickness of 12-45 micrometers, the adhesive layer has a thickness of 1-3 micrometers, and the inner surface layer has a thickness of 20-100 micrometers.

More preferably, the easy-to-tear film layer has a thickness of 15-25 microns, the adhesive layer has a thickness of 1-2 microns, and the inner surface layer has a thickness of 30-60 microns.

More preferably, the inner surface layer has a thickness greater than a depth of the pit.

Preferably, the top surface of the easy-to-peel film layer has a printing ink layer.

Preferably, the adhesive layer is a solvent glue or a solventless glue.

A second object of the present application is to provide a method for processing the above-mentioned universal easy tear film, and the technical solution adopted is as follows:

The method for processing the universal easy tear film comprises the following steps:

a, pressing a plurality of pits on the top surface of the easy tear film layer;

b. compounding the bottom surface of the easy-to-peel film layer with the inner surface layer.

Preferably, the processing method further comprises a pre-processing step of printing on the top surface of the easy-to-peel film layer to form a printing ink layer.

In the first solution, the step a is to press the easy tear film layer by using a grinding wheel and a plate roller, and press a plurality of pits on the top surface of the easy tear film layer.

In the second embodiment, the step a is performed by pressing a roll with a plurality of bumps on the surface and a plate roll, and pressing a plurality of pits on the top surface of the easy-to-peel film layer.

In a third aspect, the step a is a method of laser engraving to form a plurality of pits on the top surface of the easy-to-peel film layer.

Preferably, the specific step of the step b is: applying a composite glue on the bottom surface of the easy-to-peel film layer, then aging through the drying box 5, and finally pressing and pressing the inner surface layer to form a universal easy Tear the film.

A third object of the present application is to provide a production line for the above-mentioned universal easy-to-peel film, which adopts the following technical solutions:

The manufacturing line of the universal easy-to-peel film comprises, in order, a first unwinding mechanism, a second unwinding mechanism, a composite mechanism and a winding mechanism, wherein the first unwinding mechanism and the composite mechanism are further provided with a concave surface. Pit formation mechanism.

In a first aspect, the dimple forming mechanism includes a grinding wheel and a plate roller, and the grinding wheel is in rolling contact with the plate roller.

In a second aspect, the dimple forming mechanism includes a plate roll and a press roll having a plurality of bumps on the surface, the press roll being in rolling contact with the plate roll.

In a third aspect, the pit forming mechanism is a laser engraving machine.

The beneficial effects of the present invention against the prior art are that the universal easy tear film is easily torn by the user in any direction due to the formation of a plurality of pits on the top surface of the easy tear film layer, since the easy tear film layer is a BOPE film. The inner surface layer is a VMPE film, so that the universal easy-to-peel film can be recycled and reused after use, which can greatly reduce the adverse effects on the environment.

[Description of the Drawings]

1 is a schematic cross-sectional view showing a universal easy-to-peel film according to an embodiment of the present invention;

Figure 2 is a plan view of the tear-off film layer of Figure 1;

Figure 3 is an enlarged view of the area A of Figure 2;

4 is a schematic structural view of a production line in Embodiment 1 of the present invention;

Figure 5 is a schematic view showing the structure of the grinding wheel and the plate roller of Figure 1;

Figure 6 is a schematic view showing the structure of a production line in Embodiment 2 of the present invention.

【Detailed ways】

Example 1

As shown in FIG. 1-3, the universal tear film 1 in this embodiment includes an easy tear film layer 2, an adhesive layer 4, and an inner surface layer 5 from top to bottom; the easy tear film layer 2 is A BOPE film (biaxially stretched polyethylene film), the inner surface layer 5 is a VMPE film (polyethylene aluminized film), and the top surface of the easy tear film layer 2 has a plurality of pits 3.

The plurality of dimples 3 are covered with the top surface of the easily tearable film layer 2, and the plurality of dimples 3 are evenly distributed on the top surface of the easy tear film layer 2.

The pit has a pore size of 0.06 μm, the pit has a density of 6000/cm 2 (that is, 6000 pits per square centimeter), and the pit has a depth of 1.8 μm.

The tear-off film layer has a thickness of 12 μm, the adhesive layer has a thickness of 1 μm, and the inner surface layer has a thickness of 20 μm.

The adhesive layer 4 is a solvent glue, and the solvent glue selected in the embodiment is DIC LX-516KW-75E.

The processing method of the universal easy tear film, the processing method of the universal easy tear film comprises the following steps:

a, pressing a plurality of pits on the top surface of the easy tear film layer;

The step a is to press the easy tear film layer 2 by using a grinding wheel and a plate roller, and a plurality of pits 3 are pressed on the top surface of the easy tear film layer 2.

The specific step of the step b is to apply a composite glue (ie, solvent glue) on the bottom surface of the easy-to-peel film layer 2, then mature it through a drying box, and finally heat-press it with the inner surface layer 5 to make 10,000. To the easy to tear film 1.

As shown in FIGS. 4 and 5, a production line 6 of the above-mentioned universal easy-to-peel film comprises, in order, a first unwinding mechanism 601, a second unwinding mechanism 604, a composite mechanism 603, and a winding mechanism 605. A dimple forming mechanism 602 is further provided between the winding mechanism 601 and the composite mechanism 603.

The dimple forming mechanism 602 includes a grinding wheel 6021 and a plate roller 6022. The grinding wheel 6021 is in rolling contact with a plate roller 6022. The grinding wheel 6021 includes a grinding wheel body 60211 and a diamond embedding layer 60211 located on an outer surface of the grinding wheel body 6011. A plurality of bumps (ie, corundum particles) which can be pressed out of the top surface of the easy-to-peel film layer 2 on the outer circumferential surface of the diamond bump layer 60211 are described. The diamond bump layer 60211 is composed of a plurality of corundum particles and a polyurethane two-component glue. In the case of liquid, the polyurethane two-component glue is applied on the outer surface of the grinding wheel (ie, the surface of the diamond particle on the outer surface of the grinding wheel body 6011), and then placed in the curing chamber for 24 hours to solidify to form the diamond embedding layer 60211. This makes the diamond particles not easy to fall off. This solution has the lowest cost. However, since the size of the silicon carbide particles cannot be guaranteed to be the same, the size, size and distribution of the pits are not as good as the other two schemes, and the product quality stability is not high enough.

The following describes the working process in conjunction with Figures 4 and 5:

1. The BOPE film is sent out from the first unwinding mechanism 601, and between the grinding wheel 6021 and the plate roll 6022, the pit 3 is pressed out, and the BOPE film having the pit 3 on the top surface is processed;

2. The BOPE film having the dimples 3 on the top surface is coated with a composite glue (solvent glue) on the bottom surface of the BOPE film having the dimples 3 on the top surface, and then matured through the drying box 5 to obtain The cured BOPE film; the VMPE film is sent out from the second unwinding mechanism 604, and is combined with the bottom surface of the cured BOPE film in the composite mechanism 603 to obtain a universal easy tear film 1 which is wound by a winding mechanism 605 for the winding.

Example 2

As shown in FIG. 6, the universal easy-to-peel film in this embodiment differs from Embodiment 1 in that:

The top surface of the easy tear film layer has a printing ink layer.

The pit has a pore size of 1 μm, the pit 3 has a density of 2000 particles/cm 2 (that is, 2000 pits per square centimeter), and the pit 3 has a depth of 20 μm.

The thickness of the easily tearable film layer 2 is 45 micrometers, the thickness of the adhesive layer 4 is 3 micrometers, and the thickness of the inner surface layer 5 is 100 micrometers.

The adhesive layer 4 is a solventless glue. In this embodiment, Huntsman 7808 main agent and 60906 curing agent are selected.

The processing method further includes a pre-processing step of printing on the top surface of the easy-to-peel film layer 2 to form a printing ink layer.

A printing mechanism 606 is further disposed between the dimple forming mechanism 602 and the first unwinding mechanism 601.

The pit forming mechanism 602 replaces the grinding wheel with a press roll having a plurality of bumps on its surface, and the press roll is in rolling contact with the plate roll. The pressure roller provided with a plurality of bumps on the surface is usually made of a metal material, and the convex portion is pressed on the outer circumferential surface of the pressure roller by a mechanical or laser processing method, so that the method can better prevent the bump from falling off. Moreover, the pits extruded by the bumps are more regular and more evenly distributed, so that the quality of the product is more stable, but the cost is higher.

Example 3

The difference between the universal easy tear film in this embodiment and the embodiment 1 is:

The top surface of the easy tear film layer 2 has a printing ink layer.

The pit 3 has a pore size of 0.6 μm, the pit 3 has a density of 4000/cm 2 (that is, 4000 pits per square centimeter), and the pit 3 has a depth of 10 μm.

The thickness of the easily tearable film layer 2 is 25 micrometers, the thickness of the adhesive layer 4 is 2 micrometers, and the thickness of the inner surface layer 5 is 60 micrometers.

The adhesive layer 4 is a solventless glue. In this embodiment, a Huntsman 7808 main agent and a 60906 curing agent are selected.

The processing method further includes a pre-processing step of printing on the top surface of the easy-to-peel film layer to form a printing ink layer.

The pit forming mechanism 602 is a laser engraving machine. The laser is used to directly process the pits. The size, shape, size and distribution of the pits can be changed at any time according to the needs. The scope of application is wide, the product quality is more guaranteed, but the cost is higher.

Example 4

The difference between the universal easy tear film 1 in the embodiment and the embodiment 1 is:

The pit 3 has a pore diameter of 0.4 μm, the pit 3 has a density of 3,000/cm 2 (that is, 3,000 pits per square centimeter), and the pit 3 has a depth of 8 μm.

The thickness of the easy-to-peel film layer 2 was 15 μm, the thickness of the adhesive layer 4 was 1.5 μm, and the thickness of the inner surface layer 5 was 30 μm.

The above description is only a few preferred embodiments of the present invention, and is not intended to limit the scope of the present invention; that is, the equivalents of the scope of the claims of the present invention are covered by the scope of the present invention.

Claims

A universal easy tear film comprising: an easy tear film layer, a binder layer and an inner surface layer in order from top to bottom; the easy tear film layer is a BOPE film, and the inner surface layer is a VMPE film, The top surface of the easy tear film layer has a plurality of pits.
The universal tear film according to claim 1, wherein said plurality of pits are covered with a top surface of the easy-to-peel film layer, and the plurality of pits are evenly distributed on the top surface of the easy-to-peel film layer.
The universal tear film according to claim 1, wherein the pit has a pore diameter of 0.06-1 μm, the pit has a density of 2000-6000/cm 2 , and the pit has a depth of 1-20. Micron.
The universal tear film according to claim 1, wherein the thickness of the easy-to-peel layer is 12-45 μm, the thickness of the adhesive layer is 1-3 μm, and the thickness of the inner surface layer is 20- 100 microns.
The method for processing a universal easy tear film according to claim 1, comprising the steps of:

a, pressing a plurality of pits on the top surface of the easy tear film layer;

b. compounding the bottom surface of the easy-to-peel film layer with the inner surface layer.
The method for processing a universal easy-to-peel film according to claim 5, wherein the step a is pressing the easy-to-peel film layer by using a grinding wheel and a plate roller, and pressing a plurality of layers on the top surface of the easy-to-peel film layer. Pit.
The method for processing a universal easy-to-peel film according to claim 5, wherein the step a is performed by pressing a press roll and a plate roll having a plurality of bumps on the surface, and is easy to tear. A plurality of pits are pressed from the top surface of the film layer.
A method of processing a universal tear film according to claim 5, wherein said step a is a method of laser engraving to form a plurality of pits on the top surface of the easy tear film layer.
A universal tear-off film production line according to claim 1, comprising: a first unwinding mechanism, a second unwinding mechanism, a composite mechanism, and a winding mechanism, wherein: said first unwinding mechanism A pit forming mechanism is also provided between the composite mechanism and the composite mechanism.

A universal tear-off film production line according to claim 9, wherein said pit forming mechanism comprises a grinding wheel and a plate roller, said grinding wheel is in rolling contact with the plate roller; or said pit forming mechanism comprises a plate roller a pressure roller provided with a plurality of bumps on the surface, the pressure roller is in rolling contact with the plate roller; or the pit forming mechanism is a laser engraving machine.