CN216808689U - Hot melt adhesive tape convenient for film tearing - Google Patents

Abstract

The utility model discloses a hot melt adhesive tape convenient for film tearing, which comprises an adhesive layer and a first release film, wherein the first release film comprises a first surface and a second surface which are arranged oppositely, the first surface is a release surface, the first release film is compounded with the adhesive layer by the first surface, and a blank area which is not covered by the adhesive layer is arranged on the first surface, so that the first release film is convenient to tear, and the automatic film tearing can be realized.

Description

Hot melt adhesive tape convenient for film tearing

Technical Field

The utility model relates to an adhesive tape, in particular to a hot melt adhesive tape convenient for film tearing.

Background

The hot melt adhesive tape has higher bonding force, can quickly bond substrates, has the advantages of low cost and convenient operation, is widely applied to bonding of various substrates, and is more applied to the aspect of product outer packaging. The double-sided hot melt adhesive tape generally has a release film layer, and plays a role in supporting and protecting a hot melt adhesive material. However, it is necessary to remove the release film to bond the two materials together using hot melt adhesive tape during use. The existing double-sided hot melt adhesive tape needs to be manually torn off from a release film in the process of adhesive tape sticking, is difficult to tear the film, has low manual operation efficiency, and cannot be suitable for industrial production. Therefore, it is necessary to develop a hot melt adhesive tape which is convenient for film tearing.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides the double-sided hot melt adhesive tape, wherein the white areas which are not covered by the adhesive layer are arranged on the release film, the release film is easy to tear, and automatic film tearing can be realized.

The utility model provides a double-sided hot melt adhesive tape of an easily-torn film, which comprises an adhesive layer and a first release film, wherein the first release film comprises a first surface and a second surface which are arranged back to back, the first surface is a release surface, the first release film is compounded with the adhesive layer by the first surface, and a white area which is not covered by the adhesive layer is arranged on the first surface.

Preferably, the double-sided hot melt adhesive tape of the easy-to-tear film is provided with a margin area along the edge of the first release film.

Preferably, the margin area is disposed along a length direction of the first release film.

Preferably, the double-sided hot melt adhesive tape of the easy-to-tear film is provided with the margin area along the edge of a group of length edges of the first release film.

Preferably, the ratio of the width of the margin area to the width of the adhesive layer is 1:1 to 14.

Preferably, the width of the margin area is 0-10 mm, and the width of the adhesive layer is 10-140 mm.

Preferably, the first release film layer contains a color marker.

Preferably, the color marker of the first release film layer is blue or green.

Preferably, the thickness of the adhesive layer of the double-sided hot melt adhesive tape easy to tear is 4-14 μm; the thickness of the pressure-sensitive adhesive layer is 2-7 mu m; the thickness of the hot melt adhesive layer is 2-10 mu m.

Preferably, the adhesive layer of the double-sided hot melt adhesive tape with the easily-torn film is formed by compounding a pressure-sensitive adhesive layer and a hot melt adhesive layer; the first release film, the pressure-sensitive adhesive layer and the hot melt adhesive layer are sequentially attached.

The pressure-sensitive adhesive layer has viscosity at the temperature of 20-30 ℃, so that the adhesive layer can be fixed on the first base material, the hot-melt adhesive layer has low viscosity at the temperature of 30 ℃, so that the first base material and the second base material can move relatively, the relative position between the base materials is adjusted, and the accuracy of the adhesive sticking position is ensured; when the temperature is raised to be above 30 ℃ and the pressure of above 0.5MPa is applied, the hot melt adhesive layer can generate strong cohesiveness, and the function of firmly fixing the two base materials is achieved.

Preferably, the pressure-sensitive adhesive layer and/or the hot-melt adhesive layer are composed of a plurality of adhesive units, and the adhesive units are arranged at intervals in a non-continuous manner.

Preferably, the double-sided hot melt adhesive tape of the easy-to-tear film further comprises a second release film layer, and the second release film layer covers the hot melt adhesive layer.

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

according to the double-sided hot melt adhesive tape convenient for film tearing, the first release film is provided with the white leaving area which is not covered by the adhesive layer, after the pressure-sensitive adhesive is bonded with the base material, the first release film is conveniently and easily peeled from the white leaving area due to the low viscosity of the hot melt adhesive layer below 30 ℃, and automatic film tearing can be realized. First type membrane is coloured, can utilize CCD vision positioning system discernment rubberizing position, improves the accuracy of rubberizing position. According to the hot melt adhesive tape, glue is arranged and coated at intervals of non-continuity, so that air bubbles in the glue layer can be discharged after the glue is pasted, and the gluing performance is greatly improved. In addition, the adhesive layer of the adhesive tape is thinner, and the adhesive tape is easy to attach during adhesive tape attaching, so that the base materials are attached more tightly.

Drawings

FIG. 1 is a schematic structural view of a hot melt adhesive tape for facilitating film tearing according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a double-sided release film 1 of a hot melt adhesive tape convenient for film tearing according to an embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. 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.

Example 1

In this embodiment, the formulation of the glue is as follows:

the glue used by the hot melt adhesive layer is prepared from the following components in parts by weight: 60 parts of hydrogenated styrene-polybutadiene-styrene block copolymer, 10 parts of polystyrene-polybutadiene-styrene block copolymer, 20 parts of polyisobutylene and 10 parts of hydrogenated terpene resin.

The glue used by the pressure-sensitive adhesive layer is prepared from the following components in parts by weight: 38 parts of styrene-isoprene-styrene block copolymer, 8 parts of polystyrene-polybutadiene-styrene block copolymer, 43 parts of C5 petroleum resin, 10 parts of rosin glyceride, 10100.3 parts of antioxidant, 1680.2 parts of antioxidant and KN401012 parts of naphthenic oil.

The hot melt adhesive glue is adopted to form a hot melt adhesive layer which is basically non-viscous at the temperature of 30 ℃, the pressure sensitive adhesive glue is adopted to form a pressure sensitive adhesive layer which is viscous at normal temperature, and in other embodiments, the glue with the adhesive property can be formed in the prior art to form a corresponding adhesive layer.

The adhesive tape provided in this example was prepared as follows:

dissolving glue for forming the pressure-sensitive adhesive layer 3 and the hot-melt adhesive layer 2 into 20-40% by mass of glue by using a solvent, coating the glue of the hot-melt adhesive layer on the double-sided release film 1 in a discontinuous interval arrangement manner by using a micro-concave coating method to form the hot-melt adhesive layer 2, drying the solvent, and rolling to obtain a semi-finished product; and (3) coating the pressure-sensitive adhesive layer glue on the hot-melt adhesive layer 2 of the semi-finished product in a discontinuous interval arrangement manner by a micro-concave coating method, drying the solvent, attaching the double-sided release film 4, and rolling to obtain the finished product. And cutting off the double-sided release film 4, the hot melt adhesive layer 2 and the pressure-sensitive adhesive layer 3 with the width of 10mm from the finished product along the double-sided die of the edge of the length direction of the hot melt adhesive tape, wherein the width of the area covered by the adhesive layer is 140mm, so that the double-sided release film 1 is left with 10mm of white.

Fig. 1 is a schematic structural view of a double-sided hot melt adhesive tape for facilitating film tearing provided by the present application. Referring to fig. 1, easily tear sticky tape including the two-sided type membrane 1 that is used for the bearing to glue the material, has hot melt adhesive glue on the two-sided type membrane 1 coating to form hot melt adhesive glue film 2, this hot melt adhesive glue film is basically inviscid under 30 ℃, and the adhesion can strengthen greatly after the rising temperature, firmly bonds the substrate. The hot melt adhesive layer 2 is coated with a layer of pressure-sensitive adhesive glue to form a pressure-sensitive adhesive layer 3, the pressure-sensitive adhesive has viscosity at normal temperature, and has adhesive force when applying certain pressure, so that the function of fixing the adhesive tape and the base material can be achieved. The double-sided release film 4 covers the pressure-sensitive adhesive layer 3 to protect the adhesive layer. The glue of the hot melt adhesive layer 2 and the pressure sensitive adhesive layer 3 is coated in a discontinuous interval arrangement, which is beneficial to discharging bubbles in the adhesive layer after adhesive pasting, and the total thickness of the adhesive layer is thinner, thereby greatly improving the adhesive pasting performance.

Fig. 2 is a schematic structural diagram of a double-sided release film 1 of a hot melt adhesive tape convenient for film tearing according to an embodiment of the present invention. Referring to fig. 2, the double-sided release film 1 has a margin width W1 of 10mm in W2 and a width W covered with an adhesive layer of 140 mm. In the present embodiment, the color of the double-sided release film 1 is blue. In actual use, color markers with other colors can be selected according to actual conditions to color the double-sided release film. The release film is provided with the color marker, so that CCD (charge coupled device) identification and positioning are facilitated, and the accuracy of adhesive tape pasting can be improved. The thickness of the double-sided release film 1 is 36-65 μm, and the double-sided release film is made of polyethylene terephthalate or biaxially oriented polypropylene. And the area which is not covered by the glue layer is left white by the double-sided release film 1, so that the double-sided release film 1 is convenient to tear.

The sticky tape that above-mentioned embodiment provided is used for the extranal packing of lithium cell, and pressure sensitive adhesive layer is used for bonding the naked electric core of lithium cell, and hot melt adhesive layer is used for bonding the extranal packing material of lithium cell, and wherein the release film that bonds the hot melt adhesive has the colour to be convenient for CCD visual identification location to its edge leaves the blank region and easily tears, can realize automatic dyestripping. After the adhesive is pasted, the electric core of the lithium battery is tightly bonded with the outer package, and the surface of the outer package of the lithium battery basically has no bubbles, so that the flatness of the outer package can be kept.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (8)

1. The utility model provides a hot melt adhesive tape convenient to tear film which characterized in that: the adhesive layer is arranged on the first surface, the first surface is a release surface, the first release film is compounded with the adhesive layer by the first surface, and a white area which is not covered by the adhesive layer is arranged on the first surface; the viscose layer is formed by pressure sensitive adhesive layer and hot melt adhesive layer complex, first from the type membrane pressure sensitive adhesive layer with hot melt adhesive layer laminates in proper order.

2. A hot melt adhesive tape for facilitating film tearing according to claim 1, wherein: and setting the blank area along the edge of the first release film.

3. A hot melt adhesive tape for facilitating film removal according to claim 2, wherein: and setting the blank area along the length direction of the first release film.

4. A hot melt adhesive tape for facilitating film removal according to claim 3, wherein: the ratio of the width of the margin area to the width of the adhesive layer is 1: 1-14.

5. A hot melt adhesive tape for facilitating film tearing according to claim 1, wherein: the thickness of the adhesive layer is 4-14 mu m.

6. A hot melt adhesive tape for facilitating film tearing according to claim 1, wherein: the thickness of the pressure-sensitive adhesive layer is 2-7 mu m; the thickness of the hot melt adhesive layer is 2-10 mu m.

7. A hot melt adhesive tape for facilitating film tearing according to claim 6, wherein: the pressure-sensitive adhesive layer and/or the hot melt adhesive layer is composed of a plurality of adhesive units, and the adhesive units are arranged at intervals in a non-continuous manner.

8. A hot melt adhesive tape for facilitating film tearing according to claim 7, wherein: still include the second and leave type rete, the second leaves type rete cover in hot melt adhesive layer.

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