WO2023040386A1

WO2023040386A1 - Rework adhesive tape and peeling method therefor

Info

Publication number: WO2023040386A1
Application number: PCT/CN2022/099645
Authority: WO
Inventors: 慕鹏燕; 袁勇; 管丹; 杨慧达
Original assignee: 苏州德佑新材料科技股份有限公司
Priority date: 2021-09-15
Filing date: 2022-06-19
Publication date: 2023-03-23
Also published as: CN113755113A

Abstract

Disclosed are a rework adhesive tape and a peeling method therefor. The rework adhesive tape comprises a base material layer, and a first rework adhesive layer and a second rework adhesive layer attached to two opposite sides of the base material layer, respectively; the material used for the base material layer comprises at least one of open-cell foam, foam adhesive, plant fiber cloth, and chemical fiber cloth. The steps of the peeling method of the rework adhesive tape comprise: the base material layer of the rework adhesive tape absorbing a debonding agent; pulling a first part to cause the first rework adhesive layer to separate from the base material layer; separating the first rework adhesive layer from the first part, and separating the second rework adhesive layer from a second part. The present rework adhesive tape has a simple structure, is convenient for production and processing, does not easily break during a peeling process, can realize integral peeling, and does not generate residual glue.

Description

A kind of heavy industry adhesive tape and peeling method thereof

technical field

The invention relates to the field of adhesive tapes, in particular to a heavy industrial adhesive tape and a stripping method thereof.

Background technique

Commonly used double-sided tapes for fixing consumer electronics such as smartphones, tablets, notebook displays, displays, light panels, display glass modules, polarizer modules, and conventional civilian and commercial applications. In order to meet the needs of heavy industry or after-sales repair of electronic products and civil and commercial products, double-sided tape with heavy industry characteristics will be used. Such as pull heavy duty tape or solvent heavy duty tape.

technical problem

Pulling the heavy-duty tape solves the problem of rework or after-sales repair of electronic products to a certain extent, but there is a high probability of breaking the tape during rework. When the tape breaks, it increases the difficulty of rework, and the pull Heavy industrial tape needs to reserve a certain handle space inside the product, which is not conducive to the development of thin products.

In the Chinese patent whose publication number is: CN111471418A, the name of the invention is: a kind of reworkable adhesive and reworkable adhesive tape and a kind of adhesive tape stripping method have recorded a kind of solvent reworkable adhesive tape. The solvent rework tape needs to form grooves in the tape by die-cutting. The groove width is narrow and the number is large. There will be a cumbersome problem of cleaning residual glue during rework.

technical solution

In order to overcome the defects in the prior art, the embodiment of the present invention provides a heavy industrial adhesive tape and its peeling method, which has a simple structure, convenient production and processing, and is not easy to break during the peeling process, and can realize the overall peeling without adhesive residue.

In order to achieve the above object, the technical solution adopted in the present invention is: a heavy industry adhesive tape, including a base material layer, and the opposite sides of the base material layer are respectively pasted with a first heavy industry adhesive layer and a second heavy industry adhesive layer. layer; the material used for the substrate layer includes at least one of open-cell foam, foam adhesive, plant fiber cloth, and chemical fiber cloth.

In the above technical solution, the first heavy-duty adhesive layer and the second heavy-duty adhesive layer respectively adopt one of drawing heavy-duty adhesive or solvent heavy-duty adhesive.

In the above technical solution, the solvent heavy industry adhesive includes organic solvent type heavy industry adhesive and water solvent type heavy industry adhesive.

In the above technical solution, the water-solvent heavy industrial adhesive is a modified polyacrylate adhesive.

In the above technical solution, the base material layer includes the open-cell foam and the foam adhesive arranged in layers.

In the above technical solution, the foaming adhesive includes a foamed water-soluble polyacrylate adhesive or a foamed synthetic rubber adhesive.

In the above technical solution, the open-cell foam is open-cell polyurethane foam.

A kind of stripping method of heavy industrial tape, it adopts above-mentioned heavy industrial tape, and the step of described stripping method comprises:

The debonding agent is absorbed by the base material layer of the heavy industrial tape; the heavy industrial tape is arranged between the first part and the second part, the first heavy industrial adhesive layer is attached to the first part, and the second The heavy industrial adhesive layer is attached to the second part;

After the substrate layer absorbs the debonding agent and stands still for a preset period of time, pulling the first part to separate the first heavy industrial adhesive layer from the substrate layer;

After the first heavy industrial adhesive layer is separated from the base material layer, the first heavy industrial adhesive layer is separated from the first component, and the second heavy industrial adhesive layer is separated from the second part separation;

Wherein, the debonding agent is an organic solvent or a water solvent.

In the above technical solution, "separating the first heavy-duty adhesive layer from the first part, and separating the second heavy-duty adhesive layer from the second part" includes drawing separation and debonding Separation; when the first heavy industry adhesive layer or the second heavy industry adhesive layer is a drawing heavy industry adhesive, drawing separation is adopted, and the first heavy industry adhesive layer or the second heavy industry adhesive layer When the heavy industry adhesive layer is a solvent heavy industry adhesive, it is separated by debonding.

In the above technical solution, the preset duration is 0 min to 60 min.

Beneficial effect

Due to the use of the above-mentioned technical solutions, the present invention has the following advantages compared with the prior art:

1. The heavy industry adhesive tape of the present invention includes a substrate layer, and the opposite sides of the substrate layer are respectively bonded with a first heavy industry adhesive layer and a second heavy industry adhesive layer; the material used in the substrate layer includes open-cell foam , foaming adhesive, plant fiber cloth, and chemical fiber cloth, use the substrate layer to absorb organic solvents or water solvents, so that the viscosity of the heavy industrial adhesive layer is reduced, so that the heavy industrial tape can be removed from the adhered peel off.

2. Attaching the heavy industrial adhesive layer to the base material layer can reduce the die-cutting process of the heavy industrial adhesive layer, simplify the processing steps, improve the processing efficiency, and ensure the pushing force, pulling force and shearing force of the tape And other mechanical functions to meet the requirements of component bonding. And because there is no need for die-cutting to form grooves on the heavy-duty adhesive layer, the heavy-duty adhesive layer in the heavy-duty tape maintains an integrally connected planar structure, and when the heavy-duty adhesive layer is separated from the adherend, it can be realized once. Peel off the heavy industrial adhesive layer as a whole to improve the peeling efficiency.

3. The first heavy industry adhesive layer and the second heavy industry adhesive layer can use drawing heavy industry adhesive or solvent heavy industry adhesive, and solvent heavy industry adhesive can choose organic solvent type heavy industry adhesive or water solvent type For heavy industrial adhesives, according to the material characteristics of the adherend, the first heavy industrial adhesive layer and the second heavy industrial adhesive layer can also choose heavy industrial adhesives with different properties. Therefore, there are many types of heavy industrial adhesive tapes formed by processing. Wide range of applications.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram 1 of a heavy industrial adhesive tape in which foam is the substrate layer in Example 1 of the present invention;

Fig. 2 is the second schematic diagram of the heavy industrial adhesive tape with foam as the substrate layer in the first embodiment of the present invention;

Fig. 3 is a schematic diagram 1 of a heavy industrial adhesive tape in which the cotton base cloth is the substrate layer in Example 2 of the present invention;

Fig. 4 is the second schematic diagram of the heavy industrial adhesive tape with cotton base cloth as the base material layer in the second embodiment of the present invention;

Fig. 5 is a schematic diagram 1 of a heavy industrial tape in which the foaming adhesive is the substrate layer in Example 3 of the present invention;

Fig. 6 is a schematic diagram 2 of a heavy industrial tape in which the foaming adhesive is the substrate layer in Example 3 of the present invention;

Fig. 7 is a schematic diagram of a heavy industrial adhesive tape with a double-layer substrate layer in Example 4 of the present invention.

Reference signs of the above drawings: 1. base material layer; 2. first heavy industry adhesive layer; 3. second heavy industry adhesive layer; 4. release profile layer.

Embodiments of the present invention

Type the description of the embodiments of the invention paragraph here. The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, 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.

The heavy industrial adhesive tape of the present invention comprises a base material layer 1, and a first heavy industrial adhesive layer 2 and a second heavy industrial adhesive layer 3 are attached to opposite sides of the base material layer 1 respectively; the base material layer 1 adopts The material includes at least one of open-cell foam, foam adhesive, plant fiber cloth, and chemical fiber cloth. A release profile layer 4 is pasted on the side of the first heavy industrial adhesive layer 2 and the second heavy industrial adhesive layer 3 facing away from the base material layer 1 . The release material layer 4 can be a single-layer release film or a double-layer release film. The organic solvent or water solvent is absorbed by the substrate layer 1 to reduce the viscosity of the heavy industrial adhesive layer, so that the heavy industrial adhesive tape can be peeled off from the adherend.

The substrate layer 1 in Embodiment 1 to Embodiment 3 is a single-layer structure, that is, the substrate layer 1 is made of one of the open-cell foam, foaming adhesive, plant fiber cloth, and chemical fiber cloth. made. The substrate layer 1 in the fourth embodiment has a double-layer structure, which is formed by laminating the open-cell foam and the foam adhesive.

Embodiment 1: Referring to Figures 1-2, a heavy industrial adhesive tape includes open-cell foam as the substrate layer 1, and a first heavy industrial adhesive layer is attached to the opposite sides of the open-cell foam 2. The second heavy industry adhesive layer 3. The release profiles can be attached to the sides of the first heavy-duty adhesive layer 2 and the second heavy-duty adhesive layer 3 facing away from the open-cell foam.

Wherein, the open-cell foam can be selected from open-cell polyurethane foam, sponge, EPDM foam, polyacrylate foam, PE foam, EVA foam, CR foam, silica gel foam, NBR foam, polyolefin Foam etc. If open-cell polyurethane foam is selected, due to the characteristics of polyurethane, it can quickly absorb organic solvents, such as alcohol, so as to quickly reduce the viscosity of the heavy industrial adhesive layer. The thickness of the open-cell polyurethane foam can be set to 1 μm˜1000 μm. Preferably, the thickness of the open-cell polyurethane foam can be set at 200 μm˜400 μm.

The first heavy-duty adhesive layer 2 can be a pull-out heavy-duty adhesive or a solvent heavy-duty adhesive. The second heavy-duty adhesive may be a draw heavy-duty adhesive or a solvent heavy-duty adhesive. Wherein, the solvent heavy industry adhesive includes organic solvent type heavy industry adhesive and water solvent type heavy industry adhesive. The drawing and reworking adhesive is mainly reworked by drawing and debonding. The organic solvent-based heavy-duty adhesive is mainly reworked through organic solvent detackification. The water-solvent type heavy-duty adhesive is mainly reworked through water-solvent debonding. The heavy-duty drawing adhesive and the organic solvent-based heavy-duty adhesive are synthetic rubber adhesives. The water-solvent heavy industrial adhesive can be a modified polyacrylate adhesive.

Wherein, the drawing heavy industry adhesive includes modified synthetic rubber type drawing heavy industry adhesive. The modified synthetic rubber type drawing heavy industry adhesive can be directly used as the heavy industry tape. For example, TPU elastomer is used as the base material, and polyacrylate adhesive is applied on both sides to form a pull-out tape; or TPE is used as the base material, and polyacrylate adhesive is applied to both sides to form a pull-out tape. Heavy-duty tape, or other tape with a pull-out feature. The elongation of the pulling heavy duty tape is greater than 300%. Among them, the TPE thermoplastic elastomer contains a hard section of plastic and a soft section of rubber. The common ones are polystyrene (SBS, SIS, SEBS, SEPS), polyolefin (TPO, TPV), PU (TPU), and others (TPEE, TPA, TPVC).

Preferably, the same type of heavy-duty adhesive is used for the first heavy-duty adhesive layer 2 and the second heavy-duty adhesive layer 3 . For example, the drawing heavy industrial adhesive is pasted on both sides of the open-cell foam, as shown in Figure 2; or the solvent heavy industrial adhesive is pasted on both sides of the open-cell foam ,As shown in Figure 1. The type of the heavy industrial adhesive can be determined according to the use environment, the nature of the adherend, etc. The thickness of the first heavy industrial adhesive layer 2 and the second heavy industrial adhesive layer 3 can be set to 1 μm˜1000 μm. Preferably, the thicknesses of the first heavy-duty adhesive layer 2 and the second heavy-duty adhesive layer 3 can be set to 100 μm˜200 μm.

Synthetic rubber adhesives, in parts by weight, include the following ingredients:

95-105 parts of synthetic rubber,

100-110 parts of tackifying resin,

8-12 parts of nitrile rubber,

0.5-1.5 parts of anti-aging agent,

10-20 parts of color paste,

210-230 parts of solvent.

Wherein, the synthetic rubber includes at least one of SBS block copolymer, SIS block copolymer, SEBS block copolymer, SEP block copolymer, and (EP)n. The tackifying resin includes at least one of petroleum resin, rosin ester resin, terpene phenol resin, terpene resin hydrogenated rosin ester resin, hydrogenated or semi-hydrogenated petroleum resin.

When synthesizing organic solvent-based heavy-duty adhesives, liquid petroleum resins with a softening point of -20°C are preferred to provide initial adhesion of the product. Hydrogenated petroleum resin with a softening point of 85°C is preferred, which can improve the adhesion of the product and have little effect on the initial tack of the product. A special tackifying resin with a low softening point is introduced into the tackifying resin. The above-mentioned special tackifying resin has a high polarity, which makes it more soluble in polar solvents than conventional tackifying resins, so that the product is Fast debonding in chemical reagents. Since alcoholic solvents are easy to obtain and have low toxicity, tackifying resins that are more sensitive to alcoholic solvents are preferred.

The anti-aging agent includes at least one of phenolic antioxidants, phosphite antioxidants, sulfur-containing antioxidants and composite antioxidants.

Modified polyacrylate adhesives, in parts by weight, include the following components:

95-105 parts of water-soluble polyacrylate pressure-sensitive adhesive;

1 to 100 parts of solvent;

0.1 to 4 parts of curing agent.

Wherein, the water-soluble polyacrylate pressure-sensitive adhesive is prepared from the following raw materials in parts by weight: 60-80 parts of acrylate soft monomer; 0-5 parts of acrylate hard monomer; functional monomer 15-30 parts; 5-10 parts of reactive anionic emulsifier; 0.3-0.5 parts of initiator; 100-150 parts of organic solvent; 5-10 parts of plasticizer, 10-16 parts of pH regulator. The curing agent is at least one of isocyanate curing agent, epoxy curing agent, metal salt curing agent and aziridine curing agent. Epoxy curing agents and metal salt curing agents are preferred. The solvent is ethanol or a mixed solution of ethanol and methanol, preferably ethanol solution.

Embodiment 2: Referring to Figures 3 to 4, a heavy industrial tape, the structure of the heavy industrial tape described in Embodiment 2 is basically similar to the structure of the heavy industrial tape described in Embodiment 1, the difference is:

Plant fiber cloth or chemical fiber cloth is used as the base material layer 1 . The plant fiber cloth can be selected from cotton base cloth, paper base non-woven fabric, linen and the like. The cotton base cloth includes cotton base woven fabric and cotton base non-woven fabric. Cotton is a fine fiber, and the fiber has a capillary effect on water and oil, and the liquid can advance along the gap between the fibers, so that the substrate layer 1 can absorb organic solvent or water solvent. The paper-based non-woven fabric can be tissue paper, linen, etc. Similarly, paper-based non-woven fabrics can also achieve the same effect. The chemical fiber cloth can be selected from highly sweat-absorbing and breathable PBT/PET blended hollow and special-shaped hollow microporous fiber cloth, PET water-absorbing fiber cloth, PVA water-absorbing fiber cloth, etc. The water-absorbing chemical fiber cloth in the chemical fiber cloth is the development and production of moisture-absorbing and dry fiber products using a chip spinning device. It makes the microporous not only stay on the surface of the fiber, but also form a penetration, and finally achieve the moisture absorption and moisture conduction performance similar to that of plant fibers, such as PET water-absorbing fiber cloth and PVA water-absorbing fiber cloth. Plant fiber cloth or chemical fiber cloth is used as the base material layer 1, which is easy to obtain and low in cost. If the cotton base cloth is used as the base layer 1, the solvent absorption speed is fast, which is beneficial to reduce the debonding time of the heavy industrial tape and improve the peeling efficiency of the heavy industrial tape.

Embodiment three: a kind of heavy industry tape, the structure of the heavy industry tape described in embodiment three is basically similar to the structure of the heavy industry tape described in embodiment one, the difference is:

A foaming adhesive is used as the base material layer 1 . Referring to FIG. 5 , the foaming adhesive includes a foamed water-soluble polyacrylate adhesive or a foamed synthetic rubber adhesive. Foaming can be done by physical or chemical means.

In the above-mentioned heavy industrial tape, the foaming adhesive is directly used as the substrate layer 1. Since the foaming adhesive can simultaneously absorb the solvent and bond the adherend, it can be directly placed on the opposite sides of the foaming adhesive. The side lamination releases the profile layer 4 to form a heavy industrial tape. For example, the base material layer 1 , the first heavy industrial adhesive layer, and the second heavy industrial adhesive layer are all made of water-soluble polyacrylate adhesive through opening and foaming, as shown in FIG. 6 .

Embodiment four: a kind of heavy industrial tape, the structure of the heavy industrial tape described in embodiment four is basically similar to the structure of the heavy industrial tape described in embodiment one, the difference is:

The substrate layer 1 is a double-layer structure. Referring to Fig. 7, the substrate layer 1 may include open-cell foam and foam adhesive arranged in layers, or may include open-cell foam and plant fiber cloth in layers, or may include laminated Set open-cell foam and chemical fiber cloth, etc. The substrate layer may also include a three-layer structure and the like. In addition to laminating at least two of the open-cell foam, the foam adhesive, the plant fiber cloth, and the chemical fiber cloth, the open-cell foam or the The foamed adhesive or the plant fiber cloth or the chemical fiber cloth is laminated with an unfoamed adhesive. For example, open-cell foam and water-soluble polyacrylate adhesive are laminated. In addition to lamination, multiple materials in the base material layer 1 can also be combined in other forms, such as wrapping plant fiber cloth, chemical fiber cloth, etc. outside the open-cell foam.

A method for peeling off a heavy industrial tape, wherein the heavy industrial tape is the heavy industrial tape described in any one of Embodiments 1 to 4. The heavy industrial tape is arranged between the first part and the second part, and is used for bonding the first part and the second part. For example, the mobile phone battery and the frame are bonded with the above-mentioned heavy industrial tape. Attach the first heavy industrial adhesive layer 2 in the heavy industrial tape to the first component, and attach the second heavy industrial adhesive layer 3 in the heavy industrial tape to the second component.

The steps of the stripping method of the above-mentioned heavy industrial tape comprise:

The debonding agent is absorbed by the substrate layer 1 of the heavy industrial tape. Specifically, a quantitative amount of the debonding agent is dropped into the end of the extending direction of the heavy industrial tape.

After the substrate layer 1 absorbs the debonding agent and stands still for a preset period of time, the first part is pulled to separate the first heavy industrial adhesive layer 2 from the substrate layer 1 .

After the first heavy industry adhesive layer 2 is separated from the base material layer 1, the first heavy industry adhesive layer 2 is separated from the first part; the second heavy industry adhesive layer is separated 3 is separated from the second part.

Wherein, the debonding agent is an organic solvent or a water solvent. The organic solvent includes at least one of alcohol solvents, ethyl acetate, banana water, and stain remover oil.

The preset time length can be set to 0 min to 60 min, so that the debonding agent can have sufficient time to flow with the internal pores of the base material layer 1 and combine with the first heavy industrial adhesive layer 2 and the first heavy industrial adhesive layer 2. Erzhonggong's adhesive layer 3 is in contact with each other to achieve a debonding effect. Preferably, the preset duration is 1 min to 10 min. The preset duration is adjusted according to the material of the substrate layer 1 , the thickness of the substrate layer 1 and the like. As for the use of the cotton base cloth as the base material layer 1, because the cotton base cloth has good water absorption performance, it can quickly absorb solvents, therefore, the shorter preset time length can be used, thereby improving the peeling performance. efficiency.

Due to the hydrophobicity of the synthetic rubber adhesive, the synthetic rubber adhesive can be debonded using an organic solvent or a water solvent. Water-solvent-based heavy-duty adhesives need to be debonded with water-solvent.

"Separating the first heavy industrial adhesive layer 2 from the first component, and separating the second heavy industrial adhesive layer 3 from the second component" includes pulling separation and debonding separation. When the first heavy industry adhesive layer 2 or the second heavy industry adhesive layer 3 is a pulling heavy industry adhesive, drawing separation is adopted, and the first heavy industry adhesive layer 2 or the second heavy industry adhesive layer 3 When the double heavy industry adhesive layer 3 is a solvent heavy industry adhesive, it adopts debonding and separation.

For example, both the first heavy-duty adhesive layer 2 and the second heavy-duty adhesive layer 3 are set as pulling heavy-duty adhesives. After the base material layer 1 absorbs the organic solvent or water solvent, due to the hydrophobicity of the drawing heavy industrial adhesive, the distance between the drawing heavy industrial adhesive and the base material layer 1 The viscosity is reduced, so that it is convenient to separate the substrate layer 1 from the first heavy-duty adhesive layer 2 or from the second heavy-duty adhesive layer 3 . and then peel off the first heavy industrial adhesive layer 2 from the first component or peel off the second heavy industrial adhesive layer 3 from the second component by pulling and debonding.

For another example, both the first heavy-duty adhesive layer 2 and the second heavy-duty adhesive layer 3 are organic solvent-based heavy-duty adhesives. After the substrate layer 1 absorbs the organic solvent, the organic solvent debonds the first heavy-duty adhesive layer 2 and the second heavy-duty adhesive layer 3, and it faces the side of the substrate layer 1 The adhesive force is smaller than the adhesive force toward the first part or the second part, so that after being pulled, the first heavy industrial adhesive layer 2 or the second heavy industrial adhesive layer 3 and The substrate layer 1 is separated first. Since the viscosity of the first heavy industry adhesive layer 2 or the second heavy industry adhesive layer 3 has been reduced at this time, the first heavy industry adhesive layer 2 can continue to be bonded by solvent debonding. Separate from the first part or separate the second rework adhesive layer 3 from the second part. Similarly, when the water-solvent heavy industrial adhesive is pasted on the substrate layer 1, the water-solvent can be used as the debonding agent.

The first part is separated from the second part by separating the layers of the heavy industrial tape pasted between the first part and the second part, and then pasted on the The first heavy-duty adhesive layer 2 on the first component or the second heavy-duty adhesive layer 3 attached to the second component are separated to prevent deformation of the adherend.

The different materials and thicknesses of the substrate layer 1, and the different components and proportions in the heavy industrial adhesive will have different effects on the peeling of the heavy industrial adhesive. The performance of the prepared heavy industrial tape and the peeling effect of the heavy industrial tape can be tested by the following methods.

1. Thickness, adhesion and initial adhesion test according to the following methods:

GBT7125-2014 Test method for thickness of adhesive tape;

GBT2792-2014 Test method for peel strength of adhesive tape;

GBT4852-2002 Pressure-sensitive adhesive tape initial tack test method (rolling ball method).

2. Pulling force test (before absorbing solvent): stick a whole piece of heavy industrial tape 25mm*25mm in the middle of the T-block and the plate, press with a pressure of 3bar for 3s, and then place it at 23±2°C, 50±10% Stand for 72 hours under RH environment. After standing still for 72 hours, fix the plate with a tension jig, then hook the upper T-shaped block with an S-shaped hook, perform a vertical pull test on the upper, lower, left, and right sides, and record the force that pulls the T-shaped plate apart.

3. Pulling force test (after absorbing the solvent): stick a whole piece of heavy industrial tape 25mm*25mm between the plate and the T-block, press with a pressure of 3bar for 3s, and then place it at 23±2°C, 50±10%RH Stand in the environment for 72 hours. After standing still for 72 hours, drip 2-3ml of solvent on the four sides around the heavy industrial tape, and after standing for 1-10min at room temperature, use a suction cup to test the vertical pulling force of the upper, lower, left, and right sides on the T-shaped block, and record the The force with which the T-block is pulled apart.

4. XY transverse impact strength test: DuPont impact testing machine (Eimpact=m*g*h; m: 150g; g: 9.8N/kg; h: height) test, test conditions: test plate: PC + PC; pressure: 10bar /5s; Standing time: RT/24hrs; Test process: start from 5cm, raise the height every 5cm until the sample is destroyed; test environment 23±2℃, (50±10)%R.H.; test unit: J. Test method: Set the heavy industrial tape between two PC substrates, and then place it on a DuPont impact testing machine for testing.

The following is further explained by several sets of experimental data:

Test sample 1: the substrate layer 1 is made of cotton-based woven fabric, and the first heavy-duty adhesive layer 2 and the second heavy-duty adhesive layer 3 are made of synthetic rubber adhesive.

According to the formula of the synthetic rubber adhesive in Example 1, mix in a mixing tank to obtain 50% liquid rubber adhesive. Coat the release surface of the release profile with a thickness of 100 μm dry glue, and then respectively attach it to the opposite sides of the 200 μm thick cotton-based spun fabric, and finally bond it with a layer of silicon-coated release profile on one side, and roll it up to obtain a test sample one.

Test sample one test data sees the following table one:

Table I

The test results are shown in Table 2 below:

Table II

From the test results in Table 2, it can be seen that when cotton-based woven fabric is used as the substrate layer 1, the peeling force, initial adhesion, impact strength, etc. of the heavy industrial tape meet the requirements, after the cotton-based woven fabric absorbs the solvent, The pulling force of the heavy industrial tape can be quickly debonded to about 1.5kgf in 2-3 minutes. Among them, in the test results of comparison 1, the pulling force can be reduced to 0.8kgf within 2 minutes. Therefore, using cotton-based spun cloth as the base layer can quickly debond and improve the debonding efficiency.

Test sample 2: the substrate layer 1 is made of cotton-based woven fabric, and the first heavy-duty adhesive layer 2 and the second heavy-duty adhesive layer 3 are made of water-solvent heavy-duty adhesive.

Mix according to the modified polyacrylate adhesive formula in Example 1 in a mixing tank to prepare 50% modified polyacrylate adhesive. Coat the release surface of the release profile with a thickness of 100 μm dry glue, and then respectively attach it to the opposite sides of the cotton-based spun fabric with a thickness of 200 μm, and finally attach a layer of silicon-coated release profile on one side, and wind up the test sample two.

The test data of test sample two are shown in the following table three:

Table three

The test results are shown in Table 4 below:

Table four

From the test results in Table 4, it can be seen that when the mesh size of the cotton-based spun fabric is in the range of 200-400, the absorption rate of the cotton-based spun fabric to the solvent has little difference. The modified polyacrylate adhesive has a great influence on the performance of the heavy industrial tape. When the curing agent in the modified polyacrylate adhesive is 0.4 parts, the performance of the heavy industrial tape is better, and the cotton-based spun cloth can be quickly debonded after absorbing the solvent. After the curing agent content gradually increased, the debonding time was prolonged and the pulling force increased. However, compared with the ordinary heavy industrial tape, the heavy industrial tape with the above structure has a debonding time controlled at about 3 minutes, which also achieves the effect of rapid debonding.

Test sample 3: The substrate layer 1 is made of laminated foam and modified polyacrylate adhesive, the first heavy industry adhesive layer 2 and the second heavy industry adhesive layer 3 are selected from Synthetic rubber-based adhesives.

According to the formula of the synthetic rubber adhesive in Example 1, mix in a mixing tank to obtain 50% liquid rubber adhesive, and apply 100 μm dry glue thickness on the release surface of the release profile, and use it as the first layer. According to the modified polyacrylate adhesive formula in Example 1, mix in a mixing tank to obtain 35% modified polyacrylate adhesive, and apply 50 μm dry glue thickness on the release surface of the release profile, Make it a second layer. Attach the first layer and the second layer to the opposite sides of the foam layer respectively, then attach the other first layer to the second layer, and finally use a two-layer single-sided silicon-coated release profile for lamination , and rolled up to obtain test sample 3.

The test data of test sample three are shown in the following table five:

Table five

The test results are shown in Table 6 below:

Table six

From the test results in Table 6, it can be seen that when the foam is used as the substrate layer 1, when the content of the curing agent in the modified polyacrylate adhesive is less than 1 part, the debonding time is short and the pulling force can meet the peeling requirements , but compared with cotton-based spun fabrics, the debonding speed of cotton-based spun fabrics is faster and requires less pulling force.

In the present invention, specific examples have been applied to explain the principles and implementation methods of the present invention. The description of the above examples is only used to help understand the method of the present invention and its core idea; meanwhile, for those of ordinary skill in the art, according to this The idea of the invention will have changes in the specific implementation and scope of application. To sum up, the contents of this specification should not be construed as limiting the present invention.

Claims

A heavy industry tape, characterized in that: it includes a base material layer, and the opposite sides of the base material layer are respectively pasted with a first heavy industry adhesive layer and a second heavy industry adhesive layer; the base material layer adopts The material includes at least one of open-cell foam, foam adhesive, plant fiber cloth, and chemical fiber cloth.

2. The heavy industry adhesive tape according to claim 1, characterized in that: the first heavy industry adhesive layer and the second heavy industry adhesive layer are respectively made of pull-out heavy industry adhesive or solvent heavy industry adhesive kind of.

3. The heavy industrial adhesive tape according to claim 2, characterized in that: the solvent heavy industrial adhesive comprises organic solvent heavy industrial adhesive and water solvent heavy industrial adhesive.

4. The heavy industrial adhesive tape according to claim 3, characterized in that: the water-solvent heavy industrial adhesive is a modified polyacrylate adhesive.

5. The heavy industrial adhesive tape according to claim 1, characterized in that: the base material layer comprises the open-cell foam and the foam adhesive arranged in layers.

6. The heavy industrial adhesive tape according to claim 1 or 5, characterized in that: the foamed adhesive comprises a foamed water-soluble polyacrylate adhesive or a foamed synthetic rubber adhesive .

7. The heavy industrial adhesive tape according to claim 1, characterized in that: the open-cell foam is open-cell polyurethane foam.

8. A stripping method of heavy industry tape, which adopts the heavy industry tape described in any one of claims 1 to 7, characterized in that, the steps of the stripping method comprise:

The debonding agent is absorbed by the base material layer of the heavy industrial tape; the heavy industrial tape is arranged between the first part and the second part, the first heavy industrial adhesive layer is attached to the first part, and the second The heavy industrial adhesive layer is attached to the second part;

After the substrate layer absorbs the debonding agent and stands still for a preset period of time, pulling the first part to separate the first heavy industrial adhesive layer from the substrate layer;

After the first heavy industrial adhesive layer is separated from the base material layer, the first heavy industrial adhesive layer is separated from the first component, and the second heavy industrial adhesive layer is separated from the second part separation;

Wherein, the debonding agent is an organic solvent or a water solvent.

9. The stripping method according to claim 8, wherein: "separate the first heavy-duty adhesive layer from the first part, separate the second heavy-duty adhesive layer from the first Two-part separation" includes drawing separation and debonding separation; when the first heavy industry adhesive layer or the second heavy industry adhesive layer is a drawing heavy industry adhesive, the drawing separation is used, and in the second When the first heavy-duty adhesive layer or the second heavy-duty adhesive layer is a solvent heavy-duty adhesive, it adopts debonding and separation.

10. The peeling method according to claim 8, characterized in that: the preset time length is 0 min˜60 min.