A waterproof point impact resistant acrylic foam tape and preparation method thereof

Abstract

The present invention discloses a waterproof point-impact absorbing acrylic foam tape and a preparation method thereof, comprising a protective layer, an adhesive layer and a foam layer, wherein the protective layer is a release paper, the number of which is 1 layer, the adhesive layer is sticky, the number of which is 3 layers, the foam layer is made of acrylic resin, the number of which is 2 layers, namely a first foam layer and a second foam layer, one side of the first foam layer is connected to one of the adhesive layers, both sides of the second foam layer are connected to the adhesive layer, and the two adhesive layers connected to the first foam layer and the second foam layer are connected through the release paper. The first foam layer and the second foam layer in the present invention can be separated, and the side of the first foam layer or the second foam layer that was originally in contact with the release paper can be attached to the correct area, and in the case where it does not need to be returned to the factory for attachment, the foam tape attachment error is solved, and the transportation cost caused by returning to the factory is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of foam tapes, in particular to a waterproof point impact resistant absorbing acrylic foam tape and a preparation method thereof. Background Art

[0002] Foam tape has excellent sealing, flame retardancy and other functions, and is widely used in electronic and electrical products and other related fields.

[0003] Generally, during the processing of electronic and electrical products, foam tape is attached to the corresponding area. Later, when it is found that the attached area is wrong, the electronic and electrical products with the wrong foam tape can only be returned to the factory assembly line for re-attachment. However, this kind of attachment behavior is relatively simple, but the wrong foam tape cannot be used again, and the lack of foam tape increases the transportation cost by returning it to the factory for re-attachment. The inventor has made improvements based on the above defects and proposed a waterproof, point-impact-resistant, absorbing acrylic foam tape and a preparation method thereof. Summary of the invention

[0004] The purpose of the present invention is to solve the problem of incorrect foam tape attachment, which requires returning to the factory for re-attachment and increases transportation costs, and to propose a waterproof point-impact resistant absorbing acrylic foam tape and a preparation method thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A waterproof, point-impact-resistant, and absorbing acrylic foam tape and a preparation method thereof, comprising a protective layer, an adhesive layer, and a foam layer, characterized in that the protective layer is a release paper, the number of which is 1 layer, the adhesive layer is sticky, the number of which is 3 layers, the foam layer is made of acrylic resin, the number of which is 2 layers, namely a first foam layer and a second foam layer, one side of the first foam layer is connected to one of the adhesive layers, both sides of the second foam layer are connected to the adhesive layer, and the two adhesive layers connected to the first foam layer and the second foam layer are connected through the release paper.

[0007] Preferably, the adhesive layer is formed by coating a pressure-sensitive adhesive, and the pressure-sensitive adhesive is an acrylic pressure-sensitive adhesive.

[0008] Preferably, the adhesive layer comprises the following components in parts by weight: 100 parts of acrylic resin, 10-15 parts of acrylic rubber, 2-5 parts of diisocyanate curing agent, 0.5-1 part of coupling agent, 0.2-1 part of dispersant, 1-3 parts of black pigment, and 0.5-1.5 parts of unexpanded foaming powder.

[0009] Preferably, the acrylic resin comprises the following components in parts by weight: 26-30 parts of butyl acrylate, 36-38 parts of ethyl acrylate, 0.5-1.5 parts of acrylic acid, 3-6 parts of vinyl acetate, 28-32 parts of methyl methacrylate, 0.1-0.5 parts of dibenzoyl peroxide, and 100 parts of ethyl acetate.

[0010] Preferably, the release paper comprises a base paper layer, a coating layer and a silicone oil layer, the number of the base paper layer is one, and the number of the coating layer and the silicone oil layer are both two.

[0011] Preferably, both sides of the base paper layer are connected to the coating layer, a side of the coating layer away from the base paper layer is connected to the silicone oil layer, and the silicone oil layer is connected to the adhesive layer.

[0012] Preferably, a plurality of concave holes are formed on the side where the first foam layer and the second foam layer are connected to the adhesive layer, and the depth of the concave holes is less than the thickness of the first foam layer and the second foam layer.

[0013] Preferably, the plurality of recessed holes are arranged in an array on the first foam layer and the second foam layer.

[0014] The preparation method of waterproof point impact resistant acrylic foam tape is characterized by comprising the following steps:

[0015] Step 1: first add acrylic resin and acrylic rubber, stir evenly, then add dispersant, coupling agent, black pigment, diisocyanate curing agent, unexpanded foaming powder in sequence, stir evenly, and filter to obtain viscoelastic composite foam;

[0016] Step 2: placing the viscoelastic composite foam in a corresponding mold, wherein the mold has a plurality of convex points arranged in an array, and then foaming it. After foaming it in an oven to 110-140 μm, it is taken out and rolled up for storage;

[0017] Step 3: Curing for 72 hours at a temperature of 40°C-60°C to obtain a waterproof, point-impact-resistant, and absorbing acrylic foam tape.

[0018] Preferably, the foaming temperature of the oven is 65-75°C.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The first foam layer and the second foam layer in the present invention can be separated, and the side of the first foam layer or the second foam layer that was originally in contact with the release paper can be attached to the correct area. Without the need to return to the factory for attachment, the foam tape attachment error is solved and the transportation cost caused by returning to the factory is reduced.

[0021] The arrangement of the concave holes in the present invention can accommodate part of the pressure-sensitive adhesive of the adhesive layer. Under the condition of the same weight of the pressure-sensitive adhesive, the thickness of the adhesive layer can be reduced, which facilitates the coating operation of the pressure-sensitive adhesive on the first foam layer and the second foam layer, and also reduces the total thickness of the foam tape, which is helpful for manual attachment operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a first embodiment of a waterproof, point-impact-resistant, and absorbing acrylic foam tape provided by the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure of the medium release paper;

[0024] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 4 This is a schematic structural diagram of a second embodiment of a waterproof, point-impact-resistant, and absorbing acrylic foam tape proposed by the present invention.

[0026] In the figure: 10, release paper; 11, base paper layer; 12, coating layer; 13, silicone oil layer; 20, adhesive layer; 30, first foam layer; 31, second foam layer; 32, concave hole. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Reference Figure 1-Figure 4 , Example

[0031] A waterproof, point-impact-resistant, and absorbing acrylic foam tape comprises a protective layer, an adhesive layer, and a foam layer. The protective layer is a release paper 10, which is one layer in number. The adhesive layer 20 is sticky and is three layers in number. The foam layer is made of acrylic resin and is two layers in number, namely a first foam layer 30 and a second foam layer 31. One side of the first foam layer 30 is connected to one of the adhesive layers 20, and both sides of the second foam layer 31 are connected to the adhesive layer 20. The two adhesive layers 20 connected to the first foam layer 30 and the second foam layer 31 are connected via the release paper 10.

[0032] Furthermore, the adhesive layer 20 is formed by coating a pressure-sensitive adhesive, and the pressure-sensitive adhesive is an acrylic pressure-sensitive adhesive;

[0033] The preparation method of the adhesive is:

[0034] Step 1: Weigh the acrylic polymer solution into the glue barrel and turn on the stirrer;

[0035] Step 2: Weigh the tackifying resin solution and add it into the stirring rubber bucket until it is stirred evenly;

[0036] Step 3: Finally, add the cross-linking agent and continue stirring for 40 minutes. The resulting glue solution after adding the cross-linking agent must be used within two hours after the stirring ends.

[0037] Further, the adhesive layer 20 includes the following components in parts by weight: 100 parts of acrylic resin, 10-15 parts of acrylic rubber, 2-5 parts of diisocyanate curing agent, 0.5-1 part of coupling agent, 0.2-1 part of dispersant, 1-3 parts of black pigment, and 0.5-1.5 parts of unexpanded foaming powder.

[0038] Further, the acrylic resin includes the following components in parts by weight: 26-30 parts of butyl acrylate, 36-38 parts of ethyl acrylate, 0.5-1.5 parts of acrylic acid, 3-6 parts of vinyl acetate, 28-32 parts of methyl methacrylate, 0.1-0.5 parts of dibenzoyl peroxide, and 100 parts of ethyl acetate.

[0039] Wherein, the preparation method of the acrylic resin comprises the following steps:

[0040] The corresponding weight portions of the above components were weighed, reacted at 80° C. for 5 h to obtain a mixture, and then kept warm for 3 h. After the mixture reached a certain viscosity, it was unloaded to obtain an acrylic resin.

[0041] Furthermore, the release paper 10 comprises a base paper layer 11 , a coating layer 12 and a silicone oil layer 13 . The number of the base paper layer 11 is one, and the number of the coating layer 12 and the silicone oil layer 13 are both two.

[0042] Furthermore, both sides of the base paper layer 11 are connected to the coating layer 12 , a side of the coating layer 12 away from the base paper layer 11 is connected to the silicone oil layer 13 , and the silicone oil layer 13 is connected to the adhesive layer 20 . Example

[0043] Embodiment 2 is an improvement on Embodiment 1, specifically:

[0044] A plurality of recessed holes 32 are formed on one side of the first foam layer 30 and the second foam layer 31 connected to the adhesive layer 20 . The depth of the recessed holes 32 is less than the thickness of the first foam layer 30 and the second foam layer 31 .

[0045] The purpose of setting the concave hole 32 is to accommodate part of the pressure-sensitive adhesive of the adhesive layer 20. Under the condition of the same weight of the pressure-sensitive adhesive, the thickness of the adhesive layer 20 can be reduced, which is convenient for the coating operation of the pressure-sensitive adhesive on the first foam layer 30 and the second foam layer 31. At the same time, it also reduces the total thickness of the foam tape of the present application, which is helpful for manual attachment operations.

[0046] Furthermore, a plurality of recessed holes 32 are arranged in an array on the first foam layer 30 and the second foam layer 31 .

[0047] The preparation method of waterproof point impact resistant acrylic foam tape comprises the following steps:

[0048] Step 1: first add acrylic resin and acrylic rubber, stir evenly, then add dispersant, coupling agent, black pigment, diisocyanate curing agent, unexpanded foaming powder in sequence, stir evenly, and filter to obtain viscoelastic composite foam;

[0049] Step 2: placing the viscoelastic composite foam in a corresponding mold, wherein the mold has a plurality of convex points arranged in an array, and then foaming it. After foaming it in an oven to 110-140 μm, it is taken out and rolled up for storage;

[0050] Step 3: Curing for 72 hours at a temperature of 40°C-60°C to obtain a waterproof, point-impact-resistant, and absorbing acrylic foam tape.

[0051] There are two types of molds, one of which can only form a concave hole 32 on one side of the viscoelastic composite foam, and the first foam layer 30 is produced;

[0052] Another method is to form concave holes 32 on both sides of the viscoelastic composite foam to produce a second foam layer 31 .

[0053] Furthermore, the foaming temperature of the oven is 65-75°C.

[0054] Working principle of the present invention:

[0055] First, prepare the first foam layer 30 and the second foam layer 31, and apply pressure-sensitive adhesive on the sides of the first foam layer 30 and the second foam layer 31 having the concave holes 32, and then place the release paper 10 between the first foam layer 30 and the second foam layer 31 to play an isolation role;

[0056] When the foam tape is attached for the first time, the side of the second foam layer 31 away from the release paper 10 is attached to the corresponding area. Later, if it is found that the foam tape is attached in the wrong position, it is directly torn off as a whole, and then the release paper 10 is found, and the first foam layer 30 and the second foam layer 31 are torn off from the release paper 10 and separated. The side of the first foam layer 30 or the second foam layer 31 that was originally in contact with the release paper 10 can be attached to the correct area. Without the need to return to the factory for attachment, the foam tape attachment error is solved and the transportation cost caused by returning to the factory is reduced.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A waterproof point impact resistant acrylic foam tape, comprising a protective layer, an adhesive layer and a foam layer, characterized in that: The protective layer is a release paper (10), the number of which is 1 layer; the adhesive layer (20) is sticky, the number of which is 3 layers; the foam layer is made of acrylic resin, the number of which is 2 layers, namely a first foam layer (30) and a second foam layer (31); one side of the first foam layer (30) is connected to one of the adhesive layers (20), and both sides of the second foam layer (31) are connected to the adhesive layer (20); the two layers of the adhesive layer (20) connected to the first foam layer (30) and the second foam layer (31) are connected via the release paper (10).

2. A waterproof point impact resistant acrylic foam tape according to claim 1, characterized in that: The adhesive layer (20) is formed by coating a pressure-sensitive adhesive, and the pressure-sensitive adhesive is an acrylic pressure-sensitive adhesive.

3. A waterproof point impact resistant acrylic foam tape according to claim 1, characterized in that: The adhesive layer (20) comprises the following components in parts by weight: 100 parts of acrylic resin, 10-15 parts of acrylic rubber, 2-5 parts of diisocyanate curing agent, 0.5-1 part of coupling agent, 0.2-1 part of dispersant, 1-3 parts of black pigment, and 0.5-1.5 parts of unexpanded foaming powder.

4. A waterproof point impact resistant acrylic foam tape according to claim 1, characterized in that: The acrylic resin comprises the following components in parts by weight: 26-30 parts of butyl acrylate, 36-38 parts of ethyl acrylate, 0.5-1.5 parts of acrylic acid, 3-6 parts of vinyl acetate, 28-32 parts of methyl methacrylate, 0.1-0.5 parts of dibenzoyl peroxide, and 100 parts of ethyl acetate.

5. The waterproof point impact resistant acrylic foam tape according to claim 1, characterized in that: The release paper (10) comprises a base paper layer (11), a coating layer (12) and a silicone oil layer (13); the base paper layer (11) comprises one layer, and the coating layer (12) and the silicone oil layer (13) comprise two layers.

6. A waterproof point impact resistant acrylic foam tape according to claim 5, characterized in that: Both sides of the base paper layer (11) are connected to the coating layer (12), a side of the coating layer (12) away from the base paper layer (11) is connected to the silicone oil layer (13), and the silicone oil layer (13) is connected to the adhesive layer (20).

7. The waterproof point impact resistant acrylic foam tape according to claim 1, characterized in that: A plurality of recessed holes (32) are provided on one side of the first foam layer (30) and the second foam layer (31) connected to the adhesive layer (20), and the depth of the recessed holes (32) is less than the thickness of the first foam layer (30) and the second foam layer (31).

8. The waterproof point impact resistant acrylic foam tape according to claim 7, characterized in that: The plurality of recessed holes (32) are arranged in an array on the first foam layer (30) and the second foam layer (31).

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