Adhesive tape easy to stretch and remove

Abstract

The utility model discloses an adhesive tape easy to stretch and remove, which comprises a stretch-proof base material layer, which is provided with a first surface and a second surface opposite to each other along the adhesive thickness and comprises at least one TPU (thermoplastic polyurethane) unit layer; the adhesive layer is arranged on the first surface and / or the second surface and comprises a rubber layer and a high-viscosity adhesive layer; the rubber layer is close to the stretch-proof base material layer, the high-viscosity glue layer is matched with the rubber layer in a concave-convex mode, the surface, away from the stretch-proof base material layer, of the high-viscosity glue layer is a first bonding surface, the surface, away from the stretch-proof base material layer, of the rubber layer is a second bonding surface, and the first bonding surface is flush with the second bonding surface. The adhesive tape is reasonable in structure, and the adhesive force of the adhesive tape is optimized through the rubber layer compounded by the rubber layer and the high-viscosity adhesive layer; the stretch-proof base material layer comprises at least one TPU unit layer, so that the tensile strength of the adhesive tape is improved, and the construction efficiency is prevented from being affected by breakage in the adhesive tape removing process.

Description

Technical Field

[0001] The utility model relates to the technical field of adhesive tapes, in particular to an easily stretchable and removable adhesive tape. Background Art

[0002] Most of the existing easy-to-pull adhesives are based on rubber-type pressure-sensitive adhesives. However, they are required to have both high adhesion and high tensile strength, which is difficult to achieve for a single adhesive tape without a substrate.

[0003] Therefore, it is necessary to improve the easy-to-stretch removal tape in the prior art. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects existing in the prior art and provide an easily stretchable removal tape, wherein the adhesive force of the tape is optimized by a composite adhesive layer of a rubber layer and a high-viscosity adhesive layer; the stretch-resistant substrate layer includes at least one TPU unit layer, thereby improving the tensile strength of the tape and preventing breakage during the removal of the tape that affects the construction efficiency.

[0005] In order to achieve the above technical effects, the technical solution of the utility model is: an easily stretchable removal tape, comprising:

[0006] A stretch-resistant substrate layer having a first surface and a second surface opposite to each other along the thickness of the rubber and comprising at least one TPU unit layer;

[0007] An adhesive layer, disposed on the first surface and / or the second surface, comprising a rubber layer and a high-viscosity adhesive layer;

[0008] The rubber layer is close to the stretch-resistant substrate layer, the high-viscosity layer is matched with the rubber layer in a concave-convex manner, the surface of the high-viscosity layer away from the stretch-resistant substrate layer is a first bonding surface, the surface of the rubber layer away from the stretch-resistant substrate layer is a second bonding surface, and the first bonding surface and the second bonding surface are flush.

[0009] A preferred technical solution is that the rubber layer includes at least one inner unit rubber layer and an outer unit rubber layer, the surface of the outer unit rubber layer is a first bonding surface, and the outer unit rubber layer has a thermal viscosity-reducing foaming rubber.

[0010] A preferred technical solution is that the inner unit rubber layer includes a first thermally conductive adhesive layer, the outer unit rubber layer and / or the high viscosity adhesive layer is a second thermally conductive adhesive layer, and the first thermally conductive adhesive layer and the second thermally conductive adhesive layer are both connected to the thermally deviscous foaming adhesive.

[0011] A preferred technical solution is that an extension enhancement coating is provided between the stretch-resistant substrate layer and the adhesive layer.

[0012] A preferred technical solution is that the extension enhancement coating is a polyurethane coating.

[0013] A preferred technical solution is that the stretch-resistant substrate layer is a laminated structure of TPU / PET, TPU / PET / TPU, TPU / PET / PU or TPU / PU / TPU.

[0014] A preferred technical solution is that the layers in the stretch-resistant substrate layer are connected by polyurethane composite glue.

[0015] A preferred technical solution is that the surface area of ​​the second bonding surface is greater than the surface area of ​​the first bonding surface.

[0016] A preferred technical solution is that the high-viscosity adhesive layer is an acrylic adhesive layer or a polyurethane adhesive layer.

[0017] A preferred technical solution is that an antistatic release film is provided on the surface of the adhesive layer away from the stretch-resistant substrate layer.

[0018] The advantages and beneficial effects of the utility model are:

[0019] The structure of the easily stretchable removal tape is reasonable, and the adhesive force of the tape is optimized by the adhesive layer composited with a rubber layer and a high-viscosity adhesive layer; the stretch-resistant substrate layer includes at least one TPU unit layer, thereby improving the tensile strength of the tape and preventing breakage during the removal of the tape that affects the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of Example 1 of the easily stretchable and removable adhesive tape of the utility model;

[0021] Figure 2 This is a schematic structural diagram of Example 2 of the easily stretchable and removable adhesive tape of the utility model;

[0022] Figure 3 It is a structural schematic diagram of Example 3 of the easily stretchable and removable adhesive tape of the present invention.

[0023] In the figure: 1, stretch-resistant substrate layer; 2, adhesive layer; 3, antistatic release film; 12, extension enhancement coating; 21, high-viscosity adhesive layer; 22, rubber layer; 221, outer unit rubber layer; 222, inner unit rubber layer; 210, first bonding surface; 220, second bonding surface. DETAILED DESCRIPTION

[0024] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0025] The terms "surface area", "inside" and "outside" are based on the normal use state of the stretch-removable tape and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0026] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention of the utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0027] like Figures 1 to 3 As shown, the utility model discloses an easily stretchable removal tape, comprising a stretch-resistant substrate layer 1 and an adhesive layer 2. The stretch-resistant substrate layer 1 has a first surface and a second surface opposite to each other along the thickness of the adhesive, and comprises at least one TPU unit layer.

[0028] In some embodiments, the adhesive layer 2 is disposed on the first surface or the second surface, and the adhesive tape is a single-sided adhesive.

[0029] In another embodiment, the adhesive layer 2 is disposed on the first surface and the second surface, and the adhesive tape is a double-sided adhesive tape.

[0030] Among them, the adhesive layer 2 includes a rubber layer 22 and a high-viscosity adhesive layer 21, the rubber layer 22 is close to the stretch-resistant substrate layer 1, the high-viscosity adhesive layer 21 and the rubber layer 22 are matched in a concave-convex manner, the surface of the high-viscosity adhesive layer 21 away from the stretch-resistant substrate layer 1 is a first bonding surface 210, the surface of the rubber layer 22 away from the stretch-resistant substrate layer 1 is a second bonding surface 220, and the first bonding surface 210 and the second bonding surface 220 are flush.

[0031] In order to optimize the stretchability of the tape and the efficiency of tape removal, the surface area of ​​the second adhesive surface 220 is larger than the surface area of ​​the first adhesive surface 210 .

[0032] Furthermore, the high-viscosity adhesive layer 21 is an acrylic adhesive layer or a polyurethane adhesive layer. Acrylic adhesive is known for its wide applicability, good transparency, weather resistance (especially UV resistance) and fast curing speed. Although its tensile properties are usually not as good as rubber, acrylic adhesive is suitable for application scenarios that require high strength and high adhesion; therefore, the acrylic adhesive and the rubber layer are combined to optimize the bonding firmness and tensile properties of the adhesive layer. Polyurethane adhesive performs well in flexibility, wear resistance and chemical resistance, has excellent tensile properties, can achieve good elasticity and recovery, and its adhesion can be adjusted and modified.

[0033] In some embodiments, the stretch-resistant substrate layer 1 is a laminated structure of TPU / PET.

[0034] In some embodiments, the stretch-resistant substrate layer 1 is a laminated structure of TPU / PET / TPU.

[0035] In some embodiments, the stretch-resistant substrate layer 1 is a laminated structure of TPU / PET / PU.

[0036] In some embodiments, the stretch-resistant substrate layer 1 is a laminated structure of TPU / PU / TPU.

[0037] PET / TPU composite can combine the high strength and dimensional stability of PET with the high elasticity and wear resistance of TPU. PET as a support layer provides good tear resistance and chemical resistance, while the TPU layer gives the tape excellent elastic recovery and bonding strength, suitable for fixing automotive interior parts, pasting outdoor signs, etc.

[0038] PET / PU composite combines the transparency and rigidity of PET with the softness and good adhesion of PU. This composite material is suitable for tapes that require transparency and a certain soft touch, such as electronic screen protectors, furniture edge protection tapes, etc.

[0039] TPU / PU composites can optimize elasticity and comfort, while utilizing the high elasticity of TPU and the softness of PU. They are suitable for tapes that require high flexibility and comfortable skin contact, such as medical tapes, sports equipment fixing straps, etc.

[0040] A variety of composites can optimize performance for specific environmental conditions. For example, by selecting a specific type of TPU (such as polyether TPU) to compound with PET or PU, the hydrolysis resistance or chemical resistance of the tape can be enhanced, making it suitable for use in harsh environments.

[0041] The rubber layer 22 includes at least one inner unit rubber layer 222 and an outer unit rubber layer 221. The surface of the outer unit rubber layer 221 is the first bonding surface 220. The outer unit rubber layer 221 has a thermal viscosity-reducing foam. The multi-layer arrangement of the rubber layer 22 not only further improves its elasticity and stretchability, but also improves the structural stability. The thermal viscosity-reducing foam is a partially closed-cell thermal foaming microsphere added to the rubber raw material, which can perform the function of thermal viscosity reduction when a certain temperature is reached.

[0042] Among them, the inner unit rubber layer 222 includes a first thermally conductive rubber layer, the outer unit rubber layer 221 and / or the high viscosity rubber layer 21 is a second thermally conductive rubber layer, and the first thermally conductive rubber layer and the second thermally conductive rubber layer are both connected to the thermal viscosity-reducing foaming glue. The first thermally conductive rubber layer needs to add a high thermally conductive filler, such as aluminum oxide (Al2O3), boron nitride (BN), silicon carbide (SiC), etc., to the rubber raw material. In order to improve the thermal conductivity, the amount of raw materials added is often 40% to 70% of the total raw materials. However, the filling of thermally conductive fillers will reduce the viscosity and toughness of the rubber layer. Therefore, the inner unit rubber layer 222 can be arranged in multiple layers to maintain the tensile properties and toughness of the rubber layer 2 itself, and is connected to the second thermally conductive rubber layer through the first thermally conductive rubber layer, and acts on the thermally viscosity-reducing foaming glue, so that heat transfer to the thermal foaming microspheres can be achieved to heat up and play the viscosity-reducing function of the rubber layer. Further, the outer unit rubber layer 221 is a second thermally conductive rubber layer, thereby maintaining the comprehensive performance and adhesion of the high viscosity layer 21.

[0043] An extension enhancement coating 12 is provided between the stretch-resistant substrate layer 1 and the adhesive layer 2. The provision of the extension enhancement coating 12 further improves the tensile properties and elongation at break of the adhesive tape. Furthermore, the extension enhancement coating 12 is a polyurethane coating.

[0044] The layers of the stretch-resistant substrate layer 1 are connected by polyurethane composite adhesive (not shown). The polyurethane composite adhesive can fuse the stretch-resistant substrate layer 1 together, has excellent adhesion, and is not easy to delaminate between the layers of the stretch-resistant substrate layer 1, and further improves the tensile properties of the tape.

[0045] An antistatic release film 3 is disposed on the surface of the adhesive layer 2 away from the stretch-resistant substrate layer 1 .

[0046] Example 1

[0047] like Figure 1 As shown, the easily stretchable removal tape of Example 1 includes a stretch-resistant substrate layer 1 and an adhesive layer 2, the stretch-resistant substrate layer 1 has a first surface and a second surface opposite to each other along the thickness of the adhesive, the adhesive layer 2 is arranged on the first surface, an extension enhancement coating 12 is arranged between the stretch-resistant substrate layer 1 and the adhesive layer 2, and an antistatic release film 3 is arranged on the surface of the adhesive layer 2 away from the stretch-resistant substrate layer 1.

[0048] The adhesive layer 2 includes a rubber layer 22 and a high-viscosity adhesive layer 21. The rubber layer 22 is close to the stretch-resistant substrate layer 1. The high-viscosity adhesive layer 21 and the rubber layer 22 are matched in a concave-convex manner. The surface of the high-viscosity adhesive layer 21 away from the stretch-resistant substrate layer 1 is a first bonding surface 210, and the surface of the rubber layer 22 away from the stretch-resistant substrate layer 1 is a second bonding surface 220. The first bonding surface 210 and the second bonding surface 220 are flush, and the area of ​​the second bonding surface 220 is larger than the first bonding surface 210. The high-viscosity adhesive layer 21 is a polyurethane adhesive layer. Among them, the rubber layer 22 includes an inner unit rubber layer 222 and an outer unit rubber layer 221. The surface of the outer unit rubber layer 221 is the first bonding surface. The outer unit rubber layer 221 has a thermal viscosity-reducing foaming adhesive. The inner unit rubber layer 22 is a first thermal conductive adhesive layer, and the outer unit rubber layer 221 is a second thermal conductive adhesive layer. The first thermal conductive adhesive layer and the second thermal conductive adhesive layer are both connected to the thermal viscosity-reducing foaming adhesive.

[0049] The stretch-resistant substrate layer 1 is a laminated structure of TPU / PET / TPU. The layers in the stretch-resistant substrate layer 1 are connected by polyurethane composite adhesive (not shown). The total thickness of the stretch-resistant substrate layer 1, the adhesive layer 2 and the extension enhancement coating 12 in the tape is 0.15 mm, and the layer thickness of the antistatic release film 3 is 50 μm.

[0050] Example 2

[0051] like Figure 2 As shown, Example 2 is based on Example 1, except that the rubber layer 22 includes two layers of inner unit rubber layer 222 and outer unit rubber layer 221, and the inner unit rubber layer 222 connected to the outer unit rubber layer 221 is a first thermal conductive adhesive layer. The stretch-resistant substrate layer 1 is a laminated structure of TPU / PU / TPU. The layers in the stretch-resistant substrate layer 1 are connected by polyurethane composite adhesive.

[0052] Example 3

[0053] like Figure 3 As shown, Example 3 is based on Example 2, with the difference that the adhesive layer 2 is arranged on the first surface and the second surface, that is, a double-sided adhesive tape.

[0054] Performance test of adhesive tape after removing antistatic release film

[0055] 1. Breaking strength: According to standard GB / T 30776-2014;

[0056] 2. Elongation: According to standard GB / T 30776-2014;

[0057] 3. Adhesion: According to standard GB / T2792-2014;

[0058] Determination method: Standard test environment temperature (23 ± 1) °C, relative humidity (50 ± 5)%. Wipe the steel plate with solvent and repeat the cleaning 3 times. Clean with methyl ethyl ketone or acetone for the last time.

[0059] Sample preparation: Cut three samples from the tested tape sample. The sample width is (24±0.5) mm and the length is 300 mm. Roll the roller back and forth twice along the length of the sample manually or mechanically to prevent air from remaining between the adhesive surface and the steel plate. If there is air remaining, the sample is discarded and re-prepared;

[0060] Peel strength test: Peel off 25m of tape from the folded end of the tape from the steel plate, clamp one end of the steel plate in the clamp of the tensile tester, and clamp the free end of the tape in the other clamp. Peel continuously at a rate of (5.0 ± 0.2) mm / s for 180 degrees. After the load fixture is running, ignore the value obtained when the first 25mm tape is mechanically peeled, and use the average force value obtained by the next 50mm tape as the peeling force and convert it into peel strength.

[0061] 4. Extraction force: According to standard GB / T 2792-2014;

[0062] Determination method: Standard test environment temperature (23 ± 1) °C, relative humidity (50 ± 5)%. Wipe the steel plate with solvent and repeat the cleaning 3 times. Clean with methyl ethyl ketone or acetone for the last time.

[0063] Sample preparation: Cut three samples from the tested tape sample. The sample width is 10mm and the length is 100mm. Place the tape on the upper and lower test plates of different materials, with a fitting length of 80mm, leaving 20mm as the test handle;

[0064] Extraction force test: Clamp the free end of the tape into the upper fixture. Pull and peel it continuously at any angle (such as 30°, 45°, 90°) at a rate of (5.0±0.2) mm / s. The average force value during the pulling and peeling process is the extraction force. The smaller the force value, the better the extraction effect.

[0065] The test results of the embodiment are shown in the following table:

[0066] Measurement items Example 1 Example 2 Example 3 Standard requirements Breaking strength (g / 5mm) 1106 1130 1078 ≥1000 Elongation(%) 1332 1352 1420 ≥1000 Adhesion strength (kg / 25mm) 2.5 2.4 2.6 ≥2 Extraction force 90°(g / cm) 357 367 342 ≤400

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An easily stretchable removal tape, characterized in that: include: A stretch-resistant substrate layer having a first surface and a second surface opposite to each other along the thickness of the rubber and comprising at least one TPU unit layer; An adhesive layer, disposed on the first surface and / or the second surface, comprising a rubber layer and a high-viscosity adhesive layer; The rubber layer is close to the stretch-resistant substrate layer, the high-viscosity layer is matched with the rubber layer in a concave-convex manner, the surface of the high-viscosity layer away from the stretch-resistant substrate layer is a first bonding surface, the surface of the rubber layer away from the stretch-resistant substrate layer is a second bonding surface, and the first bonding surface and the second bonding surface are flush.

2. The easily stretchable removal tape according to claim 1, characterized in that: The rubber layer comprises at least one inner unit rubber layer and an outer unit rubber layer, the surface of the outer unit rubber layer is a first bonding surface, and the outer unit rubber layer comprises a thermal viscosity-reducing foaming rubber.

3. The easily stretchable removal tape according to claim 2, characterized in that: The inner unit rubber layer includes a first heat-conducting adhesive layer, the outer unit rubber layer and / or the high-viscosity adhesive layer is a second heat-conducting adhesive layer, and the first heat-conducting adhesive layer and the second heat-conducting adhesive layer are both connected to the thermal viscosity-reducing foaming adhesive.

4. The easily stretchable removal tape according to claim 1, characterized in that: An extension enhancement coating is arranged between the stretch-resistant substrate layer and the adhesive layer.

5. The easily stretchable removal tape according to claim 4, characterized in that: The extension enhancement coating is a polyurethane coating.

6. The easily stretchable removal tape according to claim 1 or 4, characterized in that: The stretch-resistant substrate layer is a laminated structure of TPU / PET, TPU / PET / TPU, TPU / PET / PU or TPU / PU / TPU.

7. The easily stretchable removal tape according to claim 6, characterized in that: The various layers in the stretch-resistant substrate layer are connected by polyurethane composite adhesive.

8. The easily stretchable removal tape according to claim 1 or 2, characterized in that: The surface area of ​​the second bonding surface is greater than the surface area of ​​the first bonding surface.

9. The easily stretchable removal tape according to claim 1, characterized in that: The high-viscosity adhesive layer is an acrylic adhesive layer or a polyurethane adhesive layer.

10. The easily stretchable removal tape according to claim 1, characterized in that: An antistatic release film is arranged on the surface of the adhesive layer away from the stretch-resistant substrate layer.

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