Reworking adhesive tape for removing waste adhesive and preparation method of reworking adhesive tape

Abstract

The invention relates to a rework adhesive tape for removing waste glue and a preparation method thereof, and belongs to the technical field of removal of waste glue on an electronic display screen, and the rework adhesive tape comprises an elastomer base material layer and a rubber adhesive layer arranged on one side surface of the elastomer base material layer. The existing problem that the residual adhesive on the electronic screen cannot be cleaned by using a solvent is solved, and the waste adhesive on the glass screen can be conveniently and quickly removed without leaving the residual adhesive by stretching and reworking the adhesive tape to deform to cause the viscosity loss of the residual adhesive.

Description

Technical Field

[0001] The present application belongs to the technical field of waste glue removal on electronic display screens, and in particular relates to a rework tape for removing waste glue and a preparation method thereof. Background Art

[0002] The demand in the 3C consumer electronics market is huge, and during the screen manufacturing process and rework process, the problem of removing waste glue is often encountered. Because the components contain a large number of electronic devices, solvents cannot be used for cleaning, and a more convenient and quick way to remove the waste glue is needed.

[0003] For example, in a method for removing residual adhesive film from LED display products based on a surface laminating process, publication number CN112495850A discloses a technical solution that involves placing an LED display product with residual adhesive film on its surface protected with corrosion-resistant protection and placed on a workbench; soaking the LED product surface with alcohol; and repeatedly rubbing the product surface with elastic plastic hook-shaped Velcro to remove the adhesive, ensuring that the LED display product surface remains soaked in alcohol until the residual adhesive film is completely removed. This method is not suitable for the screen adhesive treatment application. Summary of the Invention

[0004] The purpose of the present invention is to address the existing problem that residual glue remaining on electronic screens cannot be cleaned using solvents, and to provide a rework tape for removing waste glue and a method for preparing the rework tape.

[0005] In order to achieve the above technical objectives, the following technical solutions are now provided:

[0006] In a first aspect, a rework tape for removing waste rubber includes an elastomeric base layer and a rubber-based adhesive layer disposed on one side of the elastomeric base layer.

[0007] In an operative embodiment, the thickness of the elastomer base layer is 50 μm; and the thickness of the rubber-based adhesive layer is 10 μm.

[0008] In an operative embodiment, the elastomer substrate layer is composed of styrene-isoprene-styrene block copolymer; wherein the copolymer model is Kraton D1111, Kraton D1114, Kraton D1126, Kraton D1193, Kraton D1155, etc.

[0009] In an practicable manner, the rubber-based adhesive layer includes a rubber main rubber and a tackifying resin;

[0010] Wherein, the main rubber is one or two or more of natural rubber, nitrile rubber, and isoprene rubber;

[0011] The tackifying resin is one or both of petroleum resin and terpene phenol resin.

[0012] In an practicable manner, the petroleum resin is Mitsui FTR-6100; the terpene phenol resin is Kraton TP-2019.

[0013] In a second aspect, a method for preparing any one of the rework tapes for removing waste adhesive according to the first aspect comprises the following steps:

[0014] S1. Take the release film and place it on a horizontal surface;

[0015] S2 take styrene - isoprene - styrene block copolymer and toluene solvent into the first stirring tank, stirring at a rate of 1000 rpm 1H, thoroughly mixed to form a substrate coating layer to be used;

[0016] S3. The substrate layer coating liquid in S2 is applied on the release film in S1 and placed on a drying conveyor device to dry the elastomer substrate layer for standby use;

[0017] S4. Natural rubber, isoprene rubber, Mitsui FTR-6100, and Kraton TP-2019 were placed in a second stirred tank in a ratio of 50:50:10:6.5, and toluene solvent was added. The mixture was stirred at 1000 rpm for 1 hour and thoroughly mixed to form a rubber adhesive layer coating solution for use.

[0018] S5. The rubber adhesive layer coating liquid in S4 is applied on the release film in S1 and placed on a drying conveyor device to dry and form a rubber adhesive layer;

[0019] S6. Laminating the elastomer substrate layer in S3 and the rubber adhesive layer in S5 to form a rework tape.

[0020] In an practicable manner, the coating in steps S3 and S5 is performed using a comma blade.

[0021] In an practicable manner, the coating rate in step S3 is 20 m / min; and the coating rate in step S5 is 30 m / min.

[0022] In an practicable manner, the temperature of each section of the drying and conveying equipment in step S3 is 80°C / 90°C / 110°C / 130°C / 155°C / 155°C / 110°C respectively.

[0023] In an practicable manner, the temperature of each section of the drying and conveying equipment in step S5 is 80°C / 90°C / 110°C / 130°C / 155°C / 155°C / 110°C respectively.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] Through two coating composite molding, it has excellent adhesion and cohesion, as well as high tensile strength and elongation at break. By stretching the rework tape to deform the residual glue and cause it to lose adhesion, the waste glue on the glass screen can be removed quickly and conveniently without leaving any residual glue. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 1. Elastomer base layer, 2. Rubber adhesive layer, 3. Release film,

[0027] Figure 1 Schematic cross-sectional view of the rework tape of the first embodiment; DETAILED DESCRIPTION

[0028] like Figure 1 In the embodiment 1 shown, in the 3C consumer electronics market, colloid will remain on the surface of the screen during the screen manufacturing process and the rework process, and operators often encounter the problem of removing waste glue. For this reason, technicians have designed a rework tape for removing waste glue from glass screens. The tape is composed of a two-layer structure, including a base layer with an elastomer as the main body, called an elastomer base layer 1; and an adhesive layer with a rubber-based adhesive as the main body, called a rubber-based adhesive layer 2, which is composited and formed by two coatings.

[0029] In this embodiment, the thickness of the elastomer base layer 1 is 50 μm; the thickness of the rubber-based adhesive layer 2 is 10 μm.

[0030] In this embodiment, the elastomer substrate layer 1 is composed of styrene-isoprene-styrene block copolymer, wherein the copolymer models include Kraton D1111, Kraton D1114, Kraton D1126, Kraton D1193, and Kraton D1155. In this embodiment, the preferred copolymer model is Kraton D1114.

[0031] In this embodiment, the rubber adhesive layer 2 includes a main rubber and a tackifying resin; wherein the main rubber is one or two or more of natural rubber, nitrile rubber, and isoprene rubber; and the tackifying resin is one or two of petroleum resin and terpene phenol resin.

[0032] The primary rubber compound is preferably a mixture of natural rubber and isoprene rubber. The tackifying resin is a mixture of petroleum resin and terpene-phenol resin, preferably Mitsui FTR-6100 and Kraton TP-2019. When preparing the rubber-based adhesive layer 2, the natural rubber, isoprene rubber, Mitsui FTR-6100, and Kraton TP-2019 are mixed in a ratio of 50:50:10:6.5.

[0033] Example 2: A method for preparing the rework tape for removing waste adhesive of Example 1, comprising the following steps:

[0034] S1. Take the release film 3 and place it on a horizontal surface;

[0035] S2. Take styrene-isoprene-styrene block copolymer and toluene solvent into a first stirring tank, stir at 1000 rpm for 1H, mix thoroughly to form a substrate coating solution for use; the above steps are for the preparation of the substrate coating solution.

[0036] S3. The substrate layer coating liquid in S2 is coated on the release film 3 in S1, and the film is placed on a drying conveyor for drying to form an elastomer substrate layer 1 for standby use; wherein, the coating is performed using a comma scraper at a coating rate of 20 m / min. When passing through the drying conveyor, the temperatures of each oven in the drying conveyor are 80°C / 90°C / 110°C / 130°C / 155°C / 155°C / 110°C, respectively.

[0037] S4. Natural rubber, isoprene rubber, FTR-6100, and TP-2019 were placed in a second stirred tank at a ratio of 50:50:10:6.5, and toluene solvent was added. The mixture was stirred at 1000 rpm for 1 hour and thoroughly mixed to form a rubber adhesive layer coating solution for standby use. The above steps are for the preparation of the rubber adhesive layer coating solution.

[0038] S5. The rubber adhesive coating liquid in S4 is applied to the release film 3 in S1, and the film is placed on a drying conveyor for drying to form a rubber adhesive layer. The coating is performed using a comma scraper at a coating rate of 30 m / min. When passing through the drying conveyor, the temperatures of each oven in the drying conveyor are 80°C / 90°C / 110°C / 130°C / 155°C / 155°C / 110°C, respectively.

[0039] S6. Laminating the elastomer substrate layer 1 in S3 and the rubber adhesive layer in S5 to form a rework tape.

[0040] In Example 1, the residual colloid mainly targeted by the rework tape is acrylic adhesive. When the product in Example 1 is used, the release film 3 is first removed, and then the rubber adhesive layer of the rework tape is pasted on the screen. Its stickiness to the residual glue is greater than its stickiness to the screen. By stretching the rework tape to deform it, the residual glue on the screen loses its stickiness, thereby achieving the purpose of removing the residual glue on the screen.

[0041] The performance test of the rework tape in Example 1 is as follows: First, peel strength: referring to the standard GB / T2792-2014, the test specimen width is 24 mm, 25 μm PET is used for reinforcement, attached to a standard mirror steel plate and an aluminum plate, and left to stand at room temperature for 72 hours. The 180° peel strength is tested at a test rate of 300 mm / min.

[0042] Second, tensile strength: refer to the standard GB / T 1040.3-2006, the test specimen width is 10mm, the length is 100mm, and the test rate is 500mm / min.

[0043] Third, reworkability: Attach the rework tape to the residual glue on the glass plate, let it stand for 1 minute, remove the tape, and observe whether the tape will break and whether the residual glue on the glass plate is cleaned after removing the tape.

[0044] The parameters of the above three indicators are shown in Table 1:

[0045]

[0046] Table 1

[0047] After testing, it was found that the product of Example 1 produced by Example 2 can effectively remove the residual glue on the glass plate while remaining intact.

[0048] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this patent application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0050] In this specification, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this specification based on specific circumstances.

[0051] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0052] Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A rework tape for removing waste rubber, characterized in that: The invention comprises an elastomer base layer and a rubber adhesive layer arranged on one side of the elastomer base layer.

2. The rework tape for waste rubber removal according to claim 1, characterized in that: The thickness of the elastomer base material layer is 50 μm; the thickness of the rubber-based adhesive layer is 10 μm.

3. The rework tape for waste rubber removal according to claim 1, characterized in that: The elastomer substrate layer is composed of styrene-isoprene-styrene block copolymer; wherein the copolymer model is Kraton D1111, Kraton D1114, Kraton D1126, Kraton D1193 and Kraton D1155.

4. The rework tape for waste rubber removal according to claim 1, characterized in that: The rubber adhesive layer comprises a main rubber and a tackifying resin; The main rubber is one or two or more of natural rubber, nitrile rubber and isoprene rubber; the tackifying resin is one or two of petroleum resin and terpene phenol resin.

5. The rework tape for waste rubber removal according to claim 4, characterized in that: The petroleum resin is Mitsui FTR-6100; the terpene phenol resin is Kraton TP-2019.

6. A method for preparing a rework tape for removing waste rubber according to any one of claims 1 to 5, characterized in that: Here are the steps: S1. Take the release film and place it on a horizontal surface; S2 take styrene - isoprene - styrene block copolymer and toluene solvent into the first stirring tank, stirring at a rate of 1000 rpm 1H, thoroughly mixed to form a substrate coating layer to be used; S3. The substrate layer coating liquid in S2 is applied on the release film in S1 and placed on a drying conveyor device to dry the elastomer substrate layer for standby use; S4. Natural rubber, isoprene rubber, Mitsui FTR-6100, and Kraton TP-2019 were placed in a second stirred tank in a ratio of 50:50:10:6.5, and toluene solvent was added. The mixture was stirred at 1000 rpm for 1 hour and thoroughly mixed to form a rubber adhesive layer coating solution for use. S5. The rubber adhesive layer coating liquid in S4 is applied on the release film in S1 and placed on a drying conveyor device to dry and form a rubber adhesive layer; S6. Laminating the elastomer substrate layer in S3 and the rubber adhesive layer in S5 to form a rework tape.

7. The method for preparing the rework tape for waste rubber removal according to claim 6, characterized in that: The coating in steps S3 and S5 was performed using a comma blade.

8. The method for preparing a rework tape for removing waste rubber according to claim 6 or 7, characterized in that: The coating rate in step S3 was 20 m / min; the coating rate in step S5 was 30 m / min.

9. The method for preparing the rework tape for removing waste rubber according to claim 8, characterized in that: The temperature of each section of the drying and conveying equipment in step S3 is 80°C / 90°C / 110°C / 130°C / 155°C / 155°C / 110°C respectively.

10. The method for preparing the rework tape for waste rubber removal according to claim 8, characterized in that: The temperature of each section of the drying and conveying equipment in step S5 is 80°C / 90°C / 110°C / 130°C / 155°C / 155°C / 110°C respectively.

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