Connecting adhesive tape for film

Abstract

The utility model discloses a connection adhesive tape for a film, which comprises a base material layer, which is provided with a first surface and a second surface which are opposite to each other along the layer thickness; the adhesive layer is arranged on the first surface; a plurality of concave parts are arranged on the first surface, the cross section of each concave part is of a structure gradually closing up from inside to outside, and the adhesive layer is in concave-convex fit with the concave parts. The connection adhesive tape for the adhesive roll is reasonable in structure, the connection firmness between the adhesive layer and the base material layer is improved through the concave part with the cross section being of the structure gradually closing up from inside to outside, and the connection adhesive tape is prevented from being delaminated to affect the stability of a joint structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of adhesive tape, especially to a splicing adhesive tape for film rolls. BACKGROUND

[0002] The splicing adhesive tape, also known as a splicing tape or a joint tape, is used for the joint of paper, film and other materials, provides strong and tough connection, and ensures smooth transition to reduce the risk of broken line or damage in the subsequent processing. In the film roll production and processing process, the existing splicing adhesive tape has the defects of high adhesion but not easy to peel, poor high-temperature resistance leading to delamination of the adhesive layer and the base material layer, unstable structure and the like.

[0003] Therefore, it is necessary to improve the splicing adhesive tape for film rolls in the prior art. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at overcoming the defects in the prior art, and provides a splicing adhesive tape for film rolls, which has a recessed portion with a gradually tapered structure from the inside to the outside in the cross section, improves the connection firmness between the adhesive layer and the base material layer, and prevents the splicing adhesive tape from delaminating to affect the stability of the joint structure.

[0005] To achieve the above technical effects, the technical scheme of the utility model is as follows: a splicing adhesive tape for film rolls, comprising:

[0006] a base material layer having a first surface and a second surface opposite along the layer thickness;

[0007] an adhesive layer arranged on the first surface;

[0008] The first surface is provided with a plurality of recessed portions, the cross section of the recessed portion has a gradually tapered structure from the inside to the outside, and the adhesive layer is in concave-convex cooperation with the recessed portion.

[0009] In the preferred technical scheme, the second surface is provided with a release layer, and an adhesive layer is arranged between the release layer and the base material layer.

[0010] In the preferred technical scheme, the adhesive layer is a silane coupling agent coating layer with antistatic property.

[0011] In the preferred technical scheme, the release layer is a silicone release agent coating layer.

[0012] In the preferred technical scheme, the adhesive layer comprises a colored unit layer and a first high-adhesion unit layer, the colored unit layer is connected in concave-convex cooperation with the base material layer, and the first high-adhesion unit layer has an adhesive surface.

[0013] Preferably, the adhesive layer comprises colored unit strips and second high-adhesion unit layers, the colored unit strips extend along a first direction, adjacent colored unit strips are arranged side by side and spaced apart, the colored unit strips are clamped between the second high-adhesion unit layers and are in concave-convex cooperation with the second high-adhesion unit layers, one of the second high-adhesion unit layers is in concave-convex cooperation with the substrate layer, and the other has an adhesive surface.

[0014] Preferably, the material of the first high-adhesion unit layer or the second high-adhesion unit layer is a silicone pressure-sensitive adhesive.

[0015] Preferably, the substrate layer comprises outer layers and a core layer clamped between the outer layers, and at least one of the outer layers is a high-temperature-resistant layer.

[0016] Preferably, the material of the core layer is polyethylene terephthalate, and the outer layer is one of a polyimide layer and a high-temperature-resistant polyethylene terephthalate layer.

[0017] Preferably, the adhesive layer is provided with an antistatic release film away from the surface of the substrate layer.

[0018] The advantages and beneficial effects of the present application are as follows:

[0019] The structure of the connecting adhesive tape for the film is reasonable, the concave part with the structure of gradually narrowing from inside to outside in the cross section improves the connection firmness between the adhesive layer and the substrate layer, increases the contact area between the adhesive layer and the substrate layer, and effectively prevents the connecting adhesive tape from delaminating and affecting the stability of the joint structure. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the connecting adhesive tape for the film of the present application;

[0021] Figure 2 is another structural schematic view of the connecting adhesive tape for the film of the present application.

[0022] In the figure: 1, substrate layer; 2, adhesive layer; 3, release layer; 4, antistatic release film; 10, core layer; 11, outer layer; 20, colored unit layer; 21, first high-adhesion unit layer; 22, second high-adhesion unit layer; 23, colored unit strip; 30, adhesive layer; 100, concave part. DETAILED DESCRIPTION

[0023] The specific implementation of the present application will be further described below in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0024] The "outer layer" and "surface" are referenced to the normal use state of the roll of film connecting tape, and are only used for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0025] In addition, the terms "first", "second", and the like are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features. In the description of the utility model creation, unless otherwise stated, the meaning of "multiple" is two or more.

[0026] The roll of film connecting tape of the utility model comprises a base material layer 1, a glue layer 2 and an antistatic release film 4, the base material layer 1 has a first surface (not marked) and a second surface (not marked) opposite along the layer thickness, the glue layer 2 is arranged on the first surface, and the surface of the glue layer 2 away from the base material layer 1 is provided with the antistatic release film 4. The first surface is provided with a plurality of recessed portions 100, the cross section of the recessed portion 100 is gradually tapered from inside to outside, and the glue layer 2 is matched with the recessed portion 100.

[0027] Through the recessed portion with the cross section gradually tapered from inside to outside, the connection firmness between the glue layer and the base material layer is improved, the contact area between the glue layer and the base material layer is also increased, and the delamination of the roll of film connecting tape is effectively prevented, so that the stability of the joint structure is influenced.

[0028] The second surface is provided with a release layer 3, and an adhesive layer 30 is arranged between the release layer 3 and the substrate layer 1. Further, the adhesive layer 30 is a silane coupling agent coating layer with antistatic property, and the release layer 3 is a silicone oil release agent coating layer. The silicone oil release layer provides excellent release effect, so that the adhesive tape can be easily peeled off from the release paper without leaving sticky substances; the silicone oil release layer has good temperature resistance and can maintain stable release effect in a wide temperature range; the silicone oil release layer has good resistance to most chemicals and is not easily affected by solvents, oils and other substances, and is suitable for various chemical environments; the silicone oil release layer can provide high transparency and does not affect the appearance of the product; the silicone oil release layer has a long service life, and its release performance remains good even after multiple peeling. When the splicing adhesive tape is wound after splicing two end portions of the film roll, the adhesive layer of the film roll is attached to the release layer provided on the second surface. In order to prevent the release layer from being adsorbed with dust due to static electricity and damaging the adhesion of the adhesive layer of the film roll, a polythiophene conductive liquid is first coated on the second surface to make the second surface have antistatic property, and a silane coupling agent is added to improve the adhesion. Then the release layer is arranged. The silane coupling agent enhances the adhesion between the release layer and the substrate layer, so that the coating is not easy to fall off under high temperature conditions, thereby improving the overall high temperature resistance. The silane coupling agent can form more stable chemical bonds at high temperatures, which helps to maintain the integrity of the release layer and reduce the performance degradation caused by temperature rise.

[0029] Different colors of splicing adhesive tapes can be used to distinguish different types or grades of film rolls, which is convenient for subsequent processing and management. In some embodiments, the adhesive layer 2 includes a colored unit layer 20 and a first high-adhesion unit layer 21. The colored unit layer 20 is connected to the substrate layer 1 in a concave-convex matching manner. The first high-adhesion unit layer 21 has an adhesive surface (not labeled). The colored unit layer 20 is sandwiched between the substrate layer 1 and the first high-adhesion unit layer 21, which effectively improves the problem of pigment particle precipitation.

[0030] In other embodiments, the adhesive layer 2 includes a colored unit strip 23 and a second high-adhesion unit layer 22. The colored unit strip 23 extends along a first direction, and adjacent colored unit strips 23 are arranged in parallel and spaced apart. The colored unit strip 23 is sandwiched between and concave-convex matched with the second high-adhesion unit layer 22. One of the second high-adhesion unit layers 22 is concave-convex matched with the substrate layer 1, and the other has an adhesive surface (not labeled). The plane of the first direction is parallel to the first surface and the second surface. The appearance of the splicing adhesive tape is enriched, showing a strip-shaped color pattern. One of the second high-adhesion unit layers 22 is first coated on the first surface. The colored unit strip 23 is prepared on a release film with grooves. The other second high-adhesion unit layer 22 is provided with grooves that are concave-convex matched with the colored unit strip 23. The colored unit strip 23 is compounded with the grooves, and then compounded with the second high-adhesion unit layer 22 that has been connected to the first surface, to obtain the structure that the colored unit strip 23 is sandwiched between and concave-convex matched with the second high-adhesion unit layer 22.

[0031] The material of the first high-adhesion unit layer 21 or the second high-adhesion unit layer 22 is silicone pressure-sensitive adhesive. Silicone pressure-sensitive adhesive can maintain its performance in a wide temperature range, has high-temperature resistance and low-temperature resistance; has strong resistance to many chemicals, solvents and oils, which makes it suitable for harsh chemical environments; can maintain its adhesion for a long time, and is not easy to age even after long-term exposure to ultraviolet light, oxygen and other environmental factors; also has good softness and elasticity, can adapt to curved and deformed surfaces, and is suitable for use on irregularly shaped objects.

[0032] In order to further improve the high-temperature resistance of the substrate layer, the substrate layer 1 comprises an outer layer 11 and a core layer 10 sandwiched between the outer layer 11, and at least one layer of the outer layer 11 is a high-temperature resistant layer. Further, the material of the core layer 10 is polyethylene terephthalate, and the outer layer 11 is one of a polyimide layer and a high-temperature resistant polyethylene terephthalate layer. The high-temperature resistant polyethylene terephthalate layer is obtained by adding high-temperature resistant particles such as glass beads and ceramic particles to the polyethylene terephthalate raw material. The outer layer 11 is formed into a through hole by hot pressing with a mold, the hole diameter of the through hole gradually increases along the axial direction, the surface with the gradually increasing hole diameter is combined with the core layer 10, and the first surface obtains a recessed portion 100 with a cross-section gradually narrowing from the inside to the outside.

[0033] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A splicing tape for film, comprising: a substrate layer having a first surface and a second surface opposite to each other along a thickness of the layer; a glue layer disposed on the first surface; characterized in that the first surface is provided with a plurality of recesses, the cross section of the recesses gradually narrows from inside to outside, and the glue layer is in concave-convex cooperation with the recesses.

2. The splicing tape for photographic film according to claim 1, characterized by the second surface is provided with a release layer, and an adhesive layer is disposed between the release layer and the substrate layer.

3. The splicing tape for photographic film according to claim 2, characterized by the adhesive layer is a silane coupling agent coating layer with antistatic property.

4. The splicing tape for photographic film according to claim 2 or 3, characterized in that, the release layer is a silicone oil release agent coating layer.

5. The splicing tape for photographic film according to claim 1, wherein the glue layer comprises a colored unit layer and a first high-adhesion unit layer, the colored unit layer is connected to the substrate layer in concave-convex cooperation, and the first high-adhesion unit layer has an adhesive surface.

6. The splicing tape for photographic film according to claim 1, wherein the glue layer comprises a colored unit strip and a second high-adhesion unit layer, the colored unit strip extends along a first direction, adjacent colored unit strips are arranged side by side and spaced apart, the colored unit strips are sandwiched between the second high-adhesion unit layers and are in concave-convex cooperation with the second high-adhesion unit layers, one of the second high-adhesion unit layers is in concave-convex cooperation with the substrate layer, and the other has an adhesive surface.

7. The splicing tape for photographic film according to claim 5, wherein the material of the first high-adhesion unit layer is organic silicon pressure-sensitive adhesive.

8. The splicing tape for photographic film according to claim 1, wherein the substrate layer comprises an outer layer and a core layer sandwiched between the outer layer, and at least one of the outer layers is a high-temperature-resistant layer.

9. The splicing tape for photographic film according to claim 8, wherein the material of the core layer is polyethylene terephthalate, and the outer layer is one of a polyimide layer and a high-temperature-resistant polyethylene terephthalate layer.

10. The splicing tape for photographic film according to claim 1, wherein the surface of the glue layer away from the substrate layer is provided with an antistatic release film.

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