CN115895473A - A kind of waterproof point-resistant impact-absorbing acrylic foam tape and its preparation method - Google Patents

Abstract

The invention discloses a waterproof point impact-resistant acrylic foam tape and a preparation method thereof, comprising a protective layer, an adhesive layer and a foam layer. The bonding layer is viscous, and the number is 3 layers. The foam layer is made of acrylic resin, and the number is 2 layers, which are respectively the first foam layer and the second foam layer. One side of the first foam layer connected to one of the adhesive layers, both sides of the second foam layer are connected to the adhesive layer, and the two layers connected to the first foam layer and the second foam layer are The adhesive layer is connected through the release paper. The first foam layer in the present invention can be separated from the second foam layer, 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, In the case that there is no need to return to the factory for attachment, it solves the error of attaching the foam tape and reduces the transportation cost caused by returning to the factory.

Description

A kind of waterproof point-resistant impact-absorbing acrylic foam tape and its preparation method

technical field

The invention relates to the technical field of foam tapes, in particular to a waterproof type impact-resistant acrylic foam tape and a preparation method thereof.

Background technique

Foam tape has excellent sealing performance, flame retardancy and other functions, and is widely used in related fields such as electronic and electrical products.

Generally, during the processing of electronic and electrical products, the foam tape is attached to the corresponding area. Afterwards, 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. Attached, but the behavior of attaching is relatively simple, but the wrongly attached foam tape cannot be used again, and the lack of foam tape, returning to the factory for re-attachment will increase the transportation cost. The inventor made improvements based on the above defects and proposed a Waterproof point-resistant impact-absorbing acrylic foam adhesive tape and its preparation method.

Contents of the invention

The purpose of the present invention is to solve the problem of foam tape being attached incorrectly, which needs to be returned to the factory for re-attachment to increase transportation costs, and proposes a waterproof point-resistant impact-absorbing acrylic foam tape and a preparation method thereof.

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

A waterproof point-resistant impact-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 one layer, and the adhesive The bonding layer is viscous, and the number is 3 layers. The foam layer is made of acrylic resin, and the number is 2 layers, which are respectively the first foam layer and the second foam layer. One side of the first foam layer connected to one of the adhesive layers, both sides of the second foam layer are connected to the adhesive layer, and the two layers connected to the first foam layer and the second foam layer are The adhesive layer is connected through the release paper.

Preferably, the adhesive layer is formed by coating a pressure-sensitive adhesive, and the pressure-sensitive adhesive is an acrylate pressure-sensitive adhesive.

Preferably, the adhesive layer 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 Dispersant, 1-3 parts of black pigment, 0.5-1.5 parts of unexpanded foaming powder.

Preferably, 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 Methyl methacrylate, 0.1-0.5 parts of dibenzoyl peroxide, 100 parts of ethyl acetate.

Preferably, the release paper has a backing paper layer, a coating layer and a silicone oil layer, the number of the backing paper layer is 1, and the number of the coating layer and the silicone oil layer are 2 layers.

Preferably, both sides of the backing paper layer are connected to the coating layer, the side of the coating layer away from the backing paper layer is connected to the silicone oil layer, and the silicone oil layer is connected to the adhesive layer. connect.

Preferably, a plurality of concave holes are opened 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 smaller than that of the first foam layer. and the thickness of the second foam layer.

Preferably, a plurality of the concave holes are arranged in an array on the first foam layer and the second foam layer.

The preparation method of waterproof point-resistant impact-absorbing acrylic foam tape is characterized in that it comprises the following steps:

The first step: first add acrylic resin and acrylic rubber, stir evenly, then add dispersant, coupling agent, black pigment, diisocyanate curing agent, unexpanded foaming powder, stir evenly and filter to obtain viscoelastic composite foam cotton;

Step 2: Put the viscoelastic composite foam into the corresponding mold, which has multiple bumps arranged in an array, and then foam it. After foaming in the oven to 110-140um, take it out Rewind and place;

Step 3: Curing for 72 hours at a temperature of 40°C-60°C to obtain a waterproof type impact-resistant acrylic foam tape.

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

Compared with the prior art, the beneficial effects of the present invention are:

1. 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 In addition, in the case of no need to return to the factory for attachment, it solves the error of attaching the foam tape and reduces the transportation cost caused by returning to the factory.

2. The setting of the concave hole in the present invention can accommodate part of the pressure-sensitive adhesive of the adhesive layer. Under the same pressure-sensitive adhesive weight, the thickness of the adhesive layer can be reduced, which is convenient for the pressure-sensitive adhesive to be placed in the first foam. layer and the coating operation on the second foam layer also reduces the overall thickness of the foam tape and facilitates the manual application operation.

Description of drawings

Fig. 1 is the structure schematic diagram of embodiment one of a kind of waterproof point impact-resistant absorbing acrylic foam adhesive tape proposed by the present invention;

Fig. 2 is the structural representation of release paper in Fig. 1;

Fig. 3 is the schematic diagram of the enlarged structure of place A in Fig. 2;

Fig. 4 is a structural schematic diagram of Embodiment 2 of a waterproof type shock-resistant absorbing acrylic foam tape proposed by the present invention.

In the figure: 10, release paper; 11, bottom paper layer; 12, coating layer; 13, silicone oil layer; 20, adhesive layer; 30, first foam layer; 31, second foam layer; 32, concave hole.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on The embodiments of the present invention and all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "top/bottom" etc. are based on the orientations shown in the drawings Or positional relationship is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "installed", "set with", "sleeved/connected", "connected", etc. should be understood in a broad sense, such as " Connection" 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 an indirect connection through an intermediary, and it can be an internal connection between two components. connectivity. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Referring to Figure 1-Figure 4,

Embodiment one:

A waterproof point-resistant impact-absorbing acrylic foam tape, including a protective layer, an adhesive layer and a foam layer, the protective layer is a release paper 10, the number is 1 layer, the adhesive layer 20 is sticky, and the number is 3 layers, The foam layer is made of acrylic resin, and the number is 2 layers, which are respectively the first foam layer 30 and the second foam layer 31, one side of the first foam layer 30 is connected with one of the adhesive layers 20, and the second Both sides of the foam layer 31 are connected to the adhesive layer 20 , and the two adhesive layers 20 connected to the first foam layer 30 and the second foam layer 31 are connected through the release paper 10 .

Further, the adhesive layer 20 is formed by coating a pressure-sensitive adhesive, and the pressure-sensitive adhesive is an acrylate pressure-sensitive adhesive;

The preparation method of adhesive is:

The first step: first weigh the acrylate polymer solution in the glue mixing bucket, and start the agitator;

Step 2: Weigh the tackifying resin solution and add it to the mixing bucket until it is evenly stirred;

Step 3: Finally, add the cross-linking agent and continue to stir for 40 minutes. The glue obtained after adding the cross-linking agent must be used up within two hours after the end of stirring.

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 dispersion agent, 1-3 parts of black pigment, 0.5-1.5 parts of unexpanded foaming powder.

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 Methyl acrylate, 0.1-0.5 parts of dibenzoyl peroxide, 100 parts of ethyl acetate.

Wherein, the preparation method of described acrylic resin comprises the steps:

Weigh the corresponding parts by weight of the above components, react at 80° C. for 5 hours to obtain a mixture, and keep warm for 3 hours, and unload the mixture after reaching a certain viscosity to obtain an acrylic resin.

Further, the release paper 10 has a backing paper layer 11, a coating layer 12 and a silicone oil layer 13, the number of the backing paper layer 11 is 1 layer, and the number of the coating layer 12 and the silicone oil layer 13 is 2 layers.

Further, both sides of the backing paper layer 11 are connected to the coating layer 12 , the side of the coating layer 12 away from the backing paper layer 11 is connected to the silicone oil layer 13 , and the silicone oil layer 13 is connected to the adhesive layer 20 .

Embodiment two:

Embodiment 2 is an improvement to Embodiment 1, specifically:

A plurality of concave holes 32 are provided on the side where the first foam layer 30 and the second foam layer 31 are connected to the adhesive layer 20, and the depth of the concave holes 32 is smaller than that of the first foam layer 30 and the second foam layer 31. thickness of.

The purpose of setting the concave hole 32 is to accommodate part of the pressure-sensitive adhesive of the adhesive layer 20. Under the same pressure-sensitive adhesive weight, the thickness of the adhesive layer 20 can be reduced, so that the pressure-sensitive adhesive can be placed on the first foam layer. 30 and the coating operation on the second foam layer 31 also reduces the total thickness of the foam tape of the present application, which is helpful for manual sticking operation.

Further, a plurality of concave holes 32 are arranged in an array on the first foam layer 30 and the second foam layer 31 .

The preparation method of the waterproof point-resistant impact-absorbing acrylic foam tape comprises the following steps:

The first step: first add acrylic resin and acrylic rubber, stir evenly, then add dispersant, coupling agent, black pigment, diisocyanate curing agent, unexpanded foaming powder, stir evenly and filter to obtain viscoelastic composite foam cotton;

Step 2: Put the viscoelastic composite foam into the corresponding mold, which has multiple bumps arranged in an array, and then foam it. After foaming in the oven to 110-140um, take it out Rewind and place;

Step 3: Curing for 72 hours at a temperature of 40°C-60°C to obtain a waterproof type impact-resistant acrylic foam tape.

Wherein, there are two kinds of moulds, one is that the concave hole 32 can only be formed on one side of the viscoelastic composite foam, and the first foam surface layer 30 is produced;

Another kind can form concave holes 32 on both sides of the viscoelastic composite foam, and the first foam surface layer 31 is produced.

Further, the foaming temperature of the oven is 65-75°C.

Working principle of the present invention:

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

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. Afterwards, if the foam tape is found to be attached in the wrong position, it is directly torn off as a whole, and then Find the release paper 10 among them, tear the first foam layer 30 and the second foam layer 31 from the release paper 10, and separate them, and the first foam layer 30 or the second foam layer 31 can be separated. The side that was originally in contact with the release paper 10 is attached to the correct area. In the case of no need to return to the factory for attachment, it solves the error of attaching the foam tape and reduces the transportation cost caused by returning to the factory.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (10)

1. a waterproof point-resistant impact-absorbing acrylic foam tape, comprising a protective layer, an adhesive layer and a foam layer, is characterized in that, the protective layer is a release paper (10), and the quantity is 1 layer. The adhesive layer (20) is viscous and consists of 3 layers. The foam layer is made of acrylic resin and has 2 layers, which are respectively the first foam layer (30) and the 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 through the release paper (10). 2. A waterproof type impact-resistant acrylic foam adhesive tape according to claim 1, characterized in that the bonding layer (20) is formed by coating a pressure-sensitive adhesive, and the pressure-sensitive adhesive is an acrylate pressure-sensitive adhesive. 3. A kind of waterproof point-resistant impact-absorbing 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, 0.5-1.5 parts of unexpanded foaming powder. 4. A waterproof point-resistant impact-absorbing acrylic foam tape according to claim 1, wherein the acrylic resin comprises the following components in parts by weight: 26-30 parts of butyl acrylate, 36-38 parts 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, 100 parts of ethyl acetate. 5. A kind of waterproof point-resistant impact-absorbing acrylic foam tape according to claim 1, characterized in that, the release paper (10) has a backing paper layer (11), a coating layer (12) and silicone oil layer (13), the number of the backing paper layer (11) is 1 layer, and the number of the coating layer (12) and the silicone oil layer (13) is 2 layers. 6. A kind of waterproof point-resistant impact-absorbing acrylic foam adhesive tape according to claim 5, characterized in that, both sides of the base paper layer (11) are connected with the laminating layer (12), and the The side of the coating layer (12) away from the backing 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. A kind of waterproof point-resistant impact-absorbing acrylic foam tape according to claim 1, characterized in that, the first foam layer (30) and the second foam layer (31) are the same as the A plurality of concave holes (32) are provided on the side where the adhesive layer (20) is connected, and the depth of the concave holes (32) is smaller than that of the first foam layer (30) and the second foam layer ( 31) Thickness. 8. A waterproof point-resistant impact-absorbing acrylic foam tape according to claim 7, characterized in that, a plurality of said concave holes (32) are formed between said first foam layer (30) and said second foam layer (30) The second foam layer (31) is arranged in an array. 9. The preparation method of the waterproof point-resistant impact-absorbing acrylic foam tape according to any one of claims 1-8, characterized in that, comprising the steps of: The first step: first add acrylic resin and acrylic rubber, stir evenly, then add dispersant, coupling agent, black pigment, diisocyanate curing agent, unexpanded foaming powder, stir evenly and filter to obtain viscoelastic composite foam cotton; Step 2: Put the viscoelastic composite foam into the corresponding mold, which has multiple bumps arranged in an array, and then foam it. After foaming in the oven to 110-140um, take it out Rewind and place; Step 3: Curing for 72 hours at a temperature of 40°C-60°C to obtain a waterproof type impact-resistant acrylic foam tape. 10. The preparation method of the waterproof point impact-resistant acrylic foam tape according to claim 9, characterized in that the foaming temperature of the oven is 65-75°C.

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