WO2023040386A1 - 一种重工胶带及其剥离方法 - Google Patents
一种重工胶带及其剥离方法 Download PDFInfo
- Publication number
- WO2023040386A1 WO2023040386A1 PCT/CN2022/099645 CN2022099645W WO2023040386A1 WO 2023040386 A1 WO2023040386 A1 WO 2023040386A1 CN 2022099645 W CN2022099645 W CN 2022099645W WO 2023040386 A1 WO2023040386 A1 WO 2023040386A1
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- WO
- WIPO (PCT)
- Prior art keywords
- heavy
- adhesive
- layer
- adhesive layer
- tape
- Prior art date
Links
- 239000002390 adhesive tape Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000853 adhesive Substances 0.000 claims abstract description 113
- 230000001070 adhesive effect Effects 0.000 claims abstract description 113
- 239000012790 adhesive layer Substances 0.000 claims abstract description 112
- 239000010410 layer Substances 0.000 claims abstract description 101
- 239000004744 fabric Substances 0.000 claims abstract description 48
- 239000006260 foam Substances 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 45
- 239000000835 fiber Substances 0.000 claims abstract description 39
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 26
- 239000000126 substance Substances 0.000 claims abstract description 16
- 239000002904 solvent Substances 0.000 claims description 53
- 239000000758 substrate Substances 0.000 claims description 42
- 239000003960 organic solvent Substances 0.000 claims description 22
- 229920000058 polyacrylate Polymers 0.000 claims description 22
- 229920003051 synthetic elastomer Polymers 0.000 claims description 15
- 239000005061 synthetic rubber Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000000926 separation method Methods 0.000 claims description 14
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 6
- 239000011496 polyurethane foam Substances 0.000 claims description 6
- 239000003292 glue Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 32
- 229920000742 Cotton Polymers 0.000 description 22
- 239000011347 resin Substances 0.000 description 14
- 229920005989 resin Polymers 0.000 description 14
- 239000000243 solution Substances 0.000 description 14
- 241000196324 Embryophyta Species 0.000 description 12
- 238000005187 foaming Methods 0.000 description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000002759 woven fabric Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 229920001400 block copolymer Polymers 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000004745 nonwoven fabric Substances 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229920002725 thermoplastic elastomer Polymers 0.000 description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 2
- 230000001476 alcoholic effect Effects 0.000 description 2
- 230000003712 anti-aging effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000009863 impact test Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 2
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 description 2
- 150000003505 terpenes Chemical class 0.000 description 2
- 235000007586 terpenes Nutrition 0.000 description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 2
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical compound C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 240000005561 Musa balbisiana Species 0.000 description 1
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005456 alcohol based solvent Substances 0.000 description 1
- 239000012874 anionic emulsifier Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002742 polystyrene-block-poly(ethylene/propylene) -block-polystyrene Polymers 0.000 description 1
- 229920000346 polystyrene-polyisoprene block-polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 229920006346 thermoplastic polyester elastomer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/26—Porous or cellular plastics
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/20—Presence of organic materials
- C09J2400/24—Presence of a foam
- C09J2400/243—Presence of a foam in the substrate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2433/00—Presence of (meth)acrylic polymer
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2453/00—Presence of block copolymer
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2475/00—Presence of polyurethane
- C09J2475/006—Presence of polyurethane in the substrate
Definitions
- the invention relates to the field of adhesive tapes, in particular to a heavy industrial adhesive tape and a stripping method thereof.
- 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.
- double-sided tape with heavy industry characteristics will be used.
- 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.
- 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.
- 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.
- 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.
- 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.
- the material used for the substrate layer includes at least one of open-cell foam, foam adhesive, plant fiber cloth, and chemical fiber cloth.
- 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.
- the solvent heavy industry adhesive includes organic solvent type heavy industry adhesive and water solvent type heavy industry adhesive.
- the water-solvent heavy industrial adhesive is a modified polyacrylate adhesive.
- the base material layer includes the open-cell foam and the foam adhesive arranged in layers.
- the foaming adhesive includes a foamed water-soluble polyacrylate adhesive or a foamed synthetic rubber adhesive.
- 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;
- 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;
- 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;
- the debonding agent is an organic solvent or a water solvent.
- 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.
- the preset duration is 0 min to 60 min.
- the present invention has the following advantages compared with the prior art:
- 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.
- 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.
- 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
- solvent heavy industry adhesive can choose organic solvent type heavy industry adhesive or water solvent type
- 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.
- 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.
- 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.
- 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 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.
- 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 ⁇ m ⁇ 1000 ⁇ m. Preferably, the thickness of the open-cell polyurethane foam can be set at 200 ⁇ m ⁇ 400 ⁇ m.
- 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.
- 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.
- 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.
- 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.
- 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).
- 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 .
- 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 ⁇ m ⁇ 1000 ⁇ m.
- the thicknesses of the first heavy-duty adhesive layer 2 and the second heavy-duty adhesive layer 3 can be set to 100 ⁇ m ⁇ 200 ⁇ m.
- Synthetic rubber adhesives in parts by weight, include the following ingredients:
- 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.
- 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:
- 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 .
- 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.
- 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.
- 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.
- 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.
- 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.
- open-cell foam and water-soluble polyacrylate adhesive are laminated.
- 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.
- 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.
- the first part is pulled to separate the first heavy industrial adhesive layer 2 from the substrate layer 1 .
- 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.
- 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.
- 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.
- 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.
- 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
- double heavy industry adhesive layer 3 is a solvent heavy industry adhesive, it adopts debonding and separation.
- both the first heavy-duty adhesive layer 2 and the second heavy-duty adhesive layer 3 are set as pulling heavy-duty adhesives.
- 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.
- 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.
- Thickness, adhesion and initial adhesion test according to the following methods:
- 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.
- 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.
- 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.
- Example 1 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 ⁇ m dry glue, and then respectively attach it to the opposite sides of the 200 ⁇ m 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:
- 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.
- Example 2 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 ⁇ m dry glue, and then respectively attach it to the opposite sides of the cotton-based spun fabric with a thickness of 200 ⁇ m, and finally attach a layer of silicon-coated release profile on one side, and wind up the test sample two.
- test data of test sample two are shown in the following table three:
- the modified polyacrylate adhesive has a great influence on the performance of the heavy industrial tape.
- 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.
- 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.
- Example 1 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 ⁇ m dry glue thickness on the release surface of the release profile, and use it as the first layer.
- modified polyacrylate adhesive formula in Example 1 mix in a mixing tank to obtain 35% modified polyacrylate adhesive, and apply 50 ⁇ m 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.
- test data of test sample three are shown in the following table five:
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Abstract
本发明公开了一种重工胶带及其剥离方法,重工胶带包括基材层,所述基材层相对的两侧分别贴合有第一重工胶黏剂层、第二重工胶黏剂层;所述基材层采用的材料包括开孔泡棉、发泡胶黏剂、植物纤维布、化学纤维布中的至少一种;重工胶带的剥离方法的步骤包括:由重工胶带的基材层吸收解粘剂;拉拔第一部件使第一重工胶黏剂层与基材层相分离;将第一重工胶黏剂层与第一部件分离,将第二重工胶黏剂层与第二部件分离。该重工胶带结构简单,生产加工方便,并在剥离过程中不易断裂,能实现整体剥离,不产生残胶。
Description
本发明涉及胶带领域,尤其涉及一种重工胶带及其剥离方法。
在智能手机、平板、笔电显示器、显示器、灯板、显示器玻璃模组、偏光片模组等消费类电子以及常规民商用中的固定常用双面胶带。为满足电子产品及民商用产品的重工或售后返修的需求,会采用具备重工特性的双面胶带。如抽拉重工胶带或溶剂重工胶带。
抽拉重工胶带在一定程度上解决了电子产品的重工或售后返修的问题,但是重工时抽拉该胶带还存在较大几率断裂的问题,当胶带断裂后反而增加了重工的难度,且抽拉重工胶带需要在产品内部预留一定的拉手空间,不利于薄型产品的研发。
在公开号为:CN111471418A,发明名称为:一种可重工胶黏剂和可重工胶带及一种胶带剥离方法的中国专利中记载了一种溶剂重工胶带。该溶剂重工胶带需要通过模切方式在胶带中形成凹槽,凹槽宽度较窄,数量较多,在重工时会存在残胶清理的繁琐性问题。
为了克服现有技术中的缺陷,本发明实施例提供了一种重工胶带及其剥离方法,其结构简单,生产加工方便,并在剥离过程中不易断裂,能实现整体剥离,不产生残胶。
为达到上述目的,本发明采用的技术方案是:一种重工胶带,包括基材层,所述基材层相对的两侧分别贴合有第一重工胶黏剂层、第二重工胶黏剂层;所述基材层采用的材料包括开孔泡棉、发泡胶黏剂、植物纤维布、化学纤维布中的至少一种。
上述技术方案中,所述第一重工胶黏剂层、所述第二重工胶黏剂层分别采用抽拉重工胶黏剂或溶剂重工胶黏剂中的一种。
上述技术方案中,所述溶剂重工胶黏剂包括有机溶剂型重工胶黏剂和水溶剂型重工胶黏剂。
上述技术方案中,所述水溶剂型重工胶黏剂为改性聚丙烯酸酯类胶黏剂。
上述技术方案中,所述基材层包括叠层设置的所述开孔泡棉和所述发泡胶黏剂。
上述技术方案中,所述发泡胶黏剂包括经发泡的水溶性聚丙烯酸酯类胶黏剂或经发泡的合成橡胶类胶黏剂。
上述技术方案中,所述开孔泡棉为开孔聚氨酯泡棉。
一种重工胶带的剥离方法,其采用上述重工胶带,所述剥离方法的步骤包括:
由重工胶带的基材层吸收解粘剂;所述重工胶带设于第一部件与第二部件间,所述第一重工胶黏剂层与所述第一部件相贴合,所述第二重工胶黏剂层与所述第二部件相贴合;
在所述基材层吸收所述解粘剂后静置预设时长,拉拔所述第一部件使所述第一重工胶黏剂层与所述基材层相分离;
在所述第一重工胶黏剂层与所述基材层分离后,将所述第一重工胶黏剂层与所述第一部件分离,将所述第二重工胶黏剂层与所述第二部件分离;
其中,所述解粘剂为有机溶剂或水溶剂。
上述技术方案中,其中“将所述第一重工胶黏剂层与所述第一部件分离,将所述第二重工胶黏剂层与所述第二部件分离”包括拉拔分离与解粘分离;在所述第一重工胶黏剂层或所述第二重工胶黏剂层为抽拉重工胶黏剂时采用拉拔分离,在所述第一重工胶黏剂层或所述第二重工胶黏剂层为溶剂重工胶黏剂时采用解粘分离。
上述技术方案中,所述预设时长为0min~60min。
由于上述技术方案运用,本发明与现有技术相比具有下列优点:
1.本发明重工胶带包括有基材层,基材层相对的两侧分别贴合有第一重工胶黏剂层、第二重工胶黏剂层;基材层采用的材料包括开孔泡棉、发泡胶黏剂、植物纤维布、化学纤维布中的至少一种,利用基材层吸收有机溶剂或水溶剂,使重工胶黏剂层的黏性降低,以便于将重工胶带从被粘物上剥离。
2.将重工胶黏剂层附着于基材层上,可减少对重工胶黏剂层的模切加工,简化加工步骤,提高加工效率,确保胶带的推出力、拉拔力、抗剪切力等力学功能满足部件贴合需求。并且由于重工胶黏剂层上不需要模切加工形成凹槽,使重工胶带中的重工胶黏剂层保持整体连接的平面结构,在重工胶黏剂层与被粘物分离时,可实现一次将重工胶黏剂层整体剥离,提高剥离效率。
3.第一重工胶黏剂层、第二重工胶黏剂层可采用抽拉重工胶黏剂或溶剂重工胶黏剂,溶剂重工胶黏剂又可选用有机溶剂型重工胶黏剂或水溶剂型重工胶黏剂,根据被粘物的材质特性,第一重工胶黏剂层、第二重工胶黏剂层还可选用不同性质的重工胶黏剂,因此,加工形成的重工胶带的种类多,适用范围广。
为让本发明的上述和其他目的、特征和优点能更明显易懂,下文特举较佳实施例,并配合所附图式,作详细说明如下。
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1是本发明实施例一中泡棉为基材层的重工胶带示意图一;
图2是本发明实施例一中泡棉为基材层的重工胶带示意图二;
图3是本发明实施例二中棉花基布为基材层的重工胶带示意图一;
图4是本发明实施例二中棉花基布为基材层的重工胶带示意图二;
图5是本发明实施例三中发泡胶黏剂为基材层的重工胶带示意图一;
图6是本发明实施例三中发泡胶黏剂为基材层的重工胶带示意图二;
图7是本发明实施例四中基材层为双层结构的重工胶带示意图。
以上附图的附图标记:1、基材层;2、第一重工胶黏剂层;3、第二重工胶黏剂层;4、离型材层。
在此处键入本发明的实施方式描述段落。下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
本发明重工胶带,包括基材层1,所述基材层1相对的两侧分别贴合有第一重工胶黏剂层2、第二重工胶黏剂层3;所述基材层1采用的材料包括开孔泡棉、发泡胶黏剂、植物纤维布、化学纤维布中的至少一种。在所述第一重工胶黏剂层2、所述第二重工胶黏剂层3背离所述基材层1的一侧贴合有离型材层4。所述离型材层4可选用单层离型膜或双层离型膜。利用基材层1吸收有机溶剂或水溶剂,使重工胶黏剂层的黏性降低,以便于将重工胶带从被粘物上剥离。
实施例一~实施例三中基材层1为单层结构,即所述基材层1由所述开孔泡棉、发泡胶黏剂、植物纤维布、化学纤维布中的其中一种制作而成。实施例四中的基材层1为双层结构,由所述开孔泡棉与所述发泡胶黏剂叠层设置而成。
实施例一:参考图1~2所示,一种重工胶带,包括将开孔泡棉作为基材层1,在所述开孔泡棉相对的两侧分别贴合第一重工胶黏剂层2、第二重工胶黏剂层3。在所述第一重工胶黏剂层2、所述第二重工胶黏剂层3背离所述开孔泡棉的一侧可分别贴合所述离型材。
其中,所述开孔泡棉可选用开孔聚氨酯泡棉、海绵、EPDM泡棉、聚丙烯酸酯泡棉、PE泡棉、EVA泡棉、CR泡棉、硅胶泡棉、NBR泡棉、聚烯烃泡棉等。如选用开孔聚氨酯泡棉,由于聚氨酯的特性,使其能够快速吸收有机溶剂,如酒精,以便快速降低重工胶黏剂层的黏性。所述开孔聚氨酯泡棉的厚度可设置为1μm~1000μm。优选地,所述开孔聚氨酯泡棉的厚度可设置为200μm~400μm。
所述第一重工胶黏剂层2可为抽拉重工胶黏剂或溶剂重工胶黏剂。所述第二重工胶黏剂可为抽拉重工胶黏剂或溶剂重工胶黏剂。其中,所述溶剂重工胶黏剂包括有机溶剂型重工胶黏剂和水溶剂型重工胶黏剂。所述抽拉重工胶黏剂主要通过抽拉解粘重工。所述有机溶剂型重工胶黏剂主要通过有机溶剂解粘重工。所述水溶剂型重工胶黏剂主要通过水溶剂解粘重工。所述抽拉重工胶黏剂与所述有机溶剂型重工胶黏剂为合成橡胶类胶黏剂。所述水溶剂型重工胶黏剂可选用改性聚丙烯酸酯类胶黏剂。
其中,所述抽拉重工胶黏剂包括改性合成橡胶型抽拉重工胶黏剂。可将所述改性合成橡胶型抽拉重工胶黏剂直接作为所述重工胶带使用。如以TPU弹性体为基材,在其两侧分别贴敷聚丙烯酸酯胶黏剂形成抽拉胶带;或以TPE为基材,在其两侧分别贴敷聚丙烯酸酯胶黏剂形成抽拉重工胶带,或其他具有抽拉功能的胶带。抽拉重工胶带的伸长率大于300%。其中,TPE热可塑性弹性体,其含有硬质段塑料及软质段橡胶。常见的有聚苯乙烯系(SBS、SIS、SEBS、SEPS)、聚烯系(TPO、TPV)、PU系(TPU)、其他(TPEE,TPA,TPVC)。
优选地,将所述第一重工胶黏剂层2与所述第二重工胶黏剂层3选用同种类型的重工胶黏剂。如在所述开孔泡棉的两侧均贴合所述抽拉重工胶黏剂,如图2所示;或在所述开孔泡棉的两侧均贴合所述溶剂重工胶黏剂,如图1所示。所述重工胶黏剂的类型可根据使用环境、被粘物的性质等确定。所述第一重工胶黏剂层2、所述第二重工胶黏剂层3的厚度可设置为1μm~1000μm。优选地,所述第一重工胶黏剂层2、所述第二重工胶黏剂层3的厚度可设置为100μm~200μm。
合成橡胶类胶黏剂,以重量份计,包括以下成分:
合成橡胶95~105份,
增黏树脂100~110份,
丁腈橡胶8~12份,
抗老化剂0.5~1.5份,
色浆10~20份,
溶剂210~230份。
其中,所述合成橡胶包括SBS嵌段共聚物、SIS嵌段共聚物、SEBS嵌段共聚物、SEP嵌段共聚物、(EP)n中的至少一种。所述增黏树脂包括石油树脂、松香酯树脂、萜烯酚树脂、萜烯树脂氢化松香酯树脂、氢化或半氢化石油树脂中的至少一种。
在合成有机溶剂型重工胶黏剂时,优选软化点为-20℃的液态石油树脂,提供产品的初粘力。优选软化点为85℃的氢化石油类树脂,提供产品的黏着力,同时对产品的初粘力影响较小。在增黏树脂中引入具有低软化点的特殊增黏树脂,上述特殊增黏树脂具有很高的极性,使其在极性溶剂中的溶解性比常规增黏树脂更高,从而使产品在化学试剂中可快速解粘。由于醇类溶剂易于取得且毒性较低,优选对醇类溶剂较为敏感的增黏树脂。
所述抗老化剂包括酚类抗氧化剂、亚磷酸酯类抗氧化剂、含硫抗氧化剂中和复合抗氧化剂中的至少一种。
改性聚丙烯酸酯类胶黏剂,以重量份计,包括以下成分:
水溶性聚丙烯酸酯压敏胶黏剂95~105份;
溶剂1~100份;
固化剂0.1~4份。
其中,所述水溶性聚丙烯酸酯压敏胶黏剂由下述重量份的各原料制备而成:丙烯酸酯软单体60~80份;丙烯酸酯硬单体0~5份;功能性单体15~30份;反应型阴离子乳化剂5~10份;引发剂0.3~0.5份;有机溶剂100~150份;增塑剂5~10份,PH调节剂10~16份。所述固化剂采用异氰酸酯固化剂、环氧固化剂、金属盐类固话剂、氮丙啶固化剂中的至少一种。优选环氧固化剂和金属盐类固化剂。所述溶剂采用乙醇或乙醇甲醇的混合溶液,优选乙醇溶液。
实施例二:参考图3~4所示,一种重工胶带,实施例二中所述重工胶带的结构与实施例一中所述重工胶带的结构基本相似,不同点在于:
将植物纤维布或化学纤维布作为基材层1。所述植物纤维布可选用棉花基布、纸基无纺布、麻布等。所述棉花基布包括棉花基纺布、棉花基无纺布。棉花是细小纤维,纤维对水、油都具有一种毛细作用,液体可以顺着纤维之间的间隙自行前进,从而使基材层1能够实现吸收有机溶剂或水溶剂。纸基无纺布可以是绵纸、麻布等。同样的,纸基无纺布也能达到相同的效果。所述化学纤维布可选用高吸汗透气PBT/PET共混中空和异形中空微孔纤维布、PET吸水纤维布、PVA吸水纤维布等。化学纤维布中吸水化学纤维布即为采用切片纺丝装置进行吸湿干爽纤维产品的开发生产。其使微多孔不仅仅停留在纤维表面,而且形成贯穿,最终达到与植物纤维类似的吸湿导湿性能,如PET吸水纤维布、PVA吸水纤维布。将植物纤维布或化学纤维布作为基材层1,其容易获得,成本低。如选用棉花基布作为基材层1,对溶剂的吸收速度快,有利于降低重工胶带的解粘时间,提高重工胶带的剥离效率。
实施例三:一种重工胶带,实施例三中所述重工胶带的结构与实施例一中所述重工胶带的结构基本相似,不同点在于:
将发泡胶黏剂作为基材层1。参考图5所示,所述发泡胶黏剂包括经发泡的水溶性聚丙烯酸酯类胶黏剂或经发泡的合成橡胶类胶黏剂。可通过物理或化学方式进行发泡处理。
上述重工胶带中以发泡胶黏剂直接作为基材层1,由于发泡胶黏剂能够同时满足吸收溶剂、粘结被粘物的功能,因此,可直接在发泡胶黏剂的相对两侧贴合离型材层4形成重工胶带。如将所述基材层1、所述第一重工胶黏层、所述第二重工胶黏层均采用经开孔发泡的水溶性聚丙烯酸酯类胶黏剂,参考图6所示。
实施例四:一种重工胶带,实施例四中所述重工胶带的结构与实施例一中所述重工胶带的结构基本相似,不同点在于:
所述基材层1为双层结构。参看图7所示,所述基材层1可包括叠层设置的开孔泡棉和发泡胶黏剂,或可包括叠层设置的开孔泡棉和植物纤维布,或可包括叠层设置的开孔泡棉和化学纤维布等。所述基材层还可包括三层结构等。除将所述开孔泡棉、所述发泡胶黏剂、所述植物纤维布和所述化学纤维布中的至少两种进行叠层外,还可在所述开孔泡棉或所述发泡胶黏剂或所述植物纤维布或所述化学纤维布上叠层设置未发泡胶黏剂。如将开孔泡棉与水溶性聚丙烯酸酯类胶黏剂叠层设置。除叠层设置外,所述基材层1中的多种材料也可以其他形式进行组合,如在开孔泡棉外包裹有植物纤维布、化学纤维布等。
一种重工胶带的剥离方法,所述重工胶带为实施例一~实施例四中任一所述重工胶带。所述重工胶带设于第一部件与第二部件间,用于粘结所述第一部件与所述第二部件。如通过上述重工胶带粘结手机电池与框体。将所述重工胶带中的第一重工胶黏剂层2与所述第一部件相贴合,将所述重工胶带中的第二重工胶黏剂层3与所述第二部件相贴合。
上述重工胶带的剥离方法的步骤包括:
由所述重工胶带的基材层1吸收解粘剂。具体的,将定量的所述解粘剂滴入所述重工胶带延伸方向的端部。
在所述基材层1吸收所述解粘剂后静置预设时长,拉拔所述第一部件使所述第一重工胶黏剂层2与所述基材层1相分离。
在所述第一重工胶黏剂层2与所述基材层1分离后,将所述第一重工胶黏剂层2与所述第一部件分离;将所述第二重工胶黏剂层3与所述第二部件分离。
其中,所述解粘剂为有机溶剂或水溶剂。所述有机溶剂包括醇类溶剂、乙酸乙酯、香蕉水、去渍油中的至少一种。
所述预设时长可设为0min~60min,以使所述解粘剂能够有充分的时间随所述基材层1内部孔隙流动并与所述第一重工胶黏剂层2、所述第二重工胶黏剂层3相接触,从而实现解粘效果。优选地,所述预设时长为1min~10min。所述预设时长根据所述基材层1的材质、所述基材层1的厚度等调整。如对于使用所述棉花基布作为所述基材层1的,由于所述棉花基布的吸水性能好,可以快速吸收溶剂,因此,可以使用较短的所述预设时长,从而提高剥离的效率。
由于合成橡胶类胶黏剂的疏水性,因此,对所述合成橡胶类胶黏剂可使用有机溶剂或水溶剂解粘。对水溶剂型重工胶黏剂需要使用水溶剂解粘。
“将所述第一重工胶黏剂层2与所述第一部件分离,将所述第二重工胶黏剂层3与所述第二部件分离”包括拉拔分离与解粘分离。在所述第一重工胶黏剂层2或所述第二重工胶黏剂层3为抽拉重工胶黏剂时采用拉拔分离,在所述第一重工胶黏剂层2或所述第二重工胶黏剂层3为溶剂重工胶黏剂时采用解粘分离。
如将所述第一重工胶黏剂层2、所述第二重工胶黏剂层3均设置为抽拉重工胶黏剂。在所述基材层1吸收所述有机溶剂或水溶剂后,由于所述所述抽拉重工胶黏剂的疏水性,使所述抽拉重工胶黏剂与所述基材层1间的黏性降低,从而便于将所述基材层1与所述第一重工胶黏剂层2或与所述第二重工胶黏剂层3分离。再利用抽拉解粘将所述第一重工胶黏剂层2从所述第一部件剥离或将所述第二重工胶黏剂层3从所述第二部件剥离。
再比如,将所述第一重工胶黏剂层2、所述第二重工胶黏剂层3均设置为有机溶剂型重工胶黏剂。在使所述基材层1吸收有机溶剂后,有机溶剂解粘所述第一重工胶黏剂层2与所述第二重工胶黏剂层3,且其朝向所述基材层1一侧的黏力小于朝向所述第一部件或所述第二部件一侧的黏力,从而在受拉后,所述第一重工胶黏剂层2或所述第二重工胶黏剂层3与所述基材层1先分离。由于此时所述第一重工胶黏剂层2或所述第二重工胶黏剂层3的黏性已经降低,因此,可继续通过溶剂解粘方式将所述第一重工胶黏剂层2与所述第一部件分离或将所述第二重工胶黏剂层3与所述第二部件部分。同理,在所述基材层1上贴合有水溶剂型重工胶黏剂时,可选用水溶剂作为解粘剂。
通过将贴合于所述第一部件与所述第二部件间的重工胶带的层间分离,从而使所述第一部件与所述第二部件分离,再从单侧将贴合于所述第一部件上的所述第一重工胶黏剂层2或贴合于所述第二部件上的所述第二重工胶黏剂层3分离,可防止被粘物变形。
所述基材层1材料的不同、厚度的不同,重工胶黏剂中组分、配比的不同对所述重工胶黏剂的剥离都会产生不同的效果。可通过以下方法对制得的重工胶带的性能及重工胶带的剥离效果进行测试。
1.厚度、黏着力以及初粘力测试按以下方法:
GBT7125-2014胶黏带厚度的试验方法;
GBT2792-2014胶黏带剥离强度的试验方法;
GBT4852-2002压敏胶黏带初黏性试验方法(滚球法)。
2.拉拔力的测试(吸收溶剂前):将重工胶带一整片25mm*25mm贴在T型块和平板的中间,用压力3bar压3s,然后置于23±2℃、50±10%RH环境下静置72小时。静置72小时后,用拉力治具固定平板,然后S型钩子勾住上T型块,进行上下左右侧垂直拉拔力测试,记录把T型板拉开的力。
3.拉拔力的测试(吸收溶剂后):将重工胶带一整片25mm*25mm贴在平板与T型块中间,用压力3bar压3s,然后置于23±2℃、50±10%RH环境下静置72小时。静置72小时后,在重工胶带四周的四个边滴入2-3ml的溶剂,常温下静置1-10min后,用吸盘在T型块上进行上下左右侧垂直拉拔力测试,记录把T型块拉开的力。
4.XY横向冲击强度测试:采用杜邦冲击试验机(Eimpact=m*g*h;m:150g;g:9.8N/kg;h:height)测试,测试条件:测试板材:PC+PC;压力:10bar/5s;静置时间:RT/24hrs;测试过程:从5cm开始,每5cm提升高度直至样品被破坏;测试环境23±2℃,(50±10)%R.H.;测试单位:J。测试方法:将重工胶带设于两片PC基材之间,然后置于杜邦冲击试验机上进行测试。
以下通过几组实验数据进一步说明:
测试样品一:所述基材层1选用棉花基纺布,所述第一重工胶黏剂层2、所述第二重工胶黏剂层3选用合成橡胶类胶黏剂。
按实施例一中合成橡胶类胶黏剂的配方在搅拌桶中进行混合,制得50%的液态橡胶型胶黏剂。在离型材的离型面涂100μm干胶厚度,然后分别贴合在200μm厚的棉花基纺布的相对两侧,最后用一层单面涂硅离型材进行贴合,收卷制得测试样品一。
测试样品一测试数据见以下表一:
表一
测试结果见以下表二:
表二
由表二中测试结果可知:在使用棉花基纺布作为基材层1时,重工胶带的剥离力、初粘力、冲击强度等在满足要求的情况下,在棉花基纺布吸收溶剂后,所述重工胶带的拉拔力在2min~3min可迅速解粘至1.5kgf左右。其中对比1的测试结果中拉拔力能够在2min内降低至0.8kgf。因此,使用棉花基纺布作为基层层可快速解粘,提高解粘效率。
测试样品二:所述基材层1选用棉花基纺布,所述第一重工胶黏剂层2、所述第二重工胶黏剂层3选用水溶剂型重工胶黏剂。
按实施例一中改性聚丙烯酸酯类胶黏剂配方在搅拌桶中进行混合,制得50%的改性聚丙烯酸酯类胶黏剂。在离型材的离型面涂100μm干胶厚度,然后分别贴合在200μm厚度的棉花基纺布的相对两侧,最后用一层单面涂硅离型材进行贴合,收卷制得测试样品二。
测试样品二测试数据见以下表三:
表三
测试结果见以下表四:
表四
由表四中测试结果可知:在棉花基纺布的目数在200~400范围内时,所述棉花基纺布对溶剂的吸收速率差别不大。改性聚丙烯酸酯类胶黏剂对所述重工胶带的性能影响较大。在改性聚丙烯酸酯类胶黏剂中固化剂在0.4份时,所述重工胶带的各项性能较优,且在所述棉花基纺布吸收溶剂后能够迅速解粘。在固化剂含量逐渐增加后,其解粘的时间延长,且拉拔力增加。但上述结构的重工胶带与普通重工胶带相比,其解粘时间控制在3min左右,同样实现了快速解粘的效果。
测试样品三:所述基材层1选用叠层设置的泡棉与改性聚丙烯酸酯类胶黏剂,所述第一重工胶黏剂层2、所述第二重工胶黏剂层3选用合成橡胶类胶黏剂。
按实施例一中合成橡胶类胶黏剂的配方在搅拌桶中进行混合,制得50%的液态橡胶型胶黏剂,在离型材的离型面涂100μm干胶厚度,将其作为第一层。按实施例一中改性聚丙烯酸酯类胶黏剂配方在搅拌桶中进行混合,制得35%的改性聚丙烯酸酯类胶黏剂,在离型材的离型面涂50μm干胶厚度,将其作为第二层。将第一层、第二层分别贴合在泡棉层的相对两侧,再将另一第一层贴合到第二层上,最后用带有两层单面涂硅离型材进行贴合,收卷制得测试样品三。
测试样品三测试数据见以下表五:
表五
测试结果见以下表六:
表六
由表六中测试结果可知:使用泡棉作为基材层1,在改性聚丙烯酸酯胶黏剂中固化剂的含量小于1份时,其解粘时间较短、拉拔力能够满足剥离要求,但与棉花基纺布相比,棉花基纺布的解粘速度更快,需要的拉拔力更小。
本发明中应用了具体实施例对本发明的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本发明的方法及其核心思想;同时,对于本领域的一般技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改变之处,综上所述,本说明书内容不应理解为对本发明的限制。
Claims (1)
- 一种重工胶带,其特征在于:包括基材层,所述基材层相对的两侧分别贴合有第一重工胶黏剂层、第二重工胶黏剂层;所述基材层采用的材料包括开孔泡棉、发泡胶黏剂、植物纤维布、化学纤维布中的至少一种。2.根据权利要求1所述的重工胶带,其特征在于:所述第一重工胶黏剂层、所述第二重工胶黏剂层分别采用抽拉重工胶黏剂或溶剂重工胶黏剂中的一种。3.根据权利要求2所述的重工胶带,其特征在于:所述溶剂重工胶黏剂包括有机溶剂型重工胶黏剂和水溶剂型重工胶黏剂。4.根据权利要求3所述的重工胶带,其特征在于:所述水溶剂型重工胶黏剂为改性聚丙烯酸酯类胶黏剂。5.根据权利要求1所述的重工胶带,其特征在于:所述基材层包括叠层设置的所述开孔泡棉和所述发泡胶黏剂。6.根据权利要求1或5所述的重工胶带,其特征在于:所述发泡胶黏剂包括经发泡的水溶性聚丙烯酸酯类胶黏剂或经发泡的合成橡胶类胶黏剂。7.根据权利要求1所述的重工胶带,其特征在于:所述开孔泡棉为开孔聚氨酯泡棉。8.一种重工胶带的剥离方法,其采用权利要求1~7任一所述的重工胶带,其特征在于,所述剥离方法的步骤包括:由重工胶带的基材层吸收解粘剂;所述重工胶带设于第一部件与第二部件间,所述第一重工胶黏剂层与所述第一部件相贴合,所述第二重工胶黏剂层与所述第二部件相贴合;在所述基材层吸收所述解粘剂后静置预设时长,拉拔所述第一部件使所述第一重工胶黏剂层与所述基材层相分离;在所述第一重工胶黏剂层与所述基材层分离后,将所述第一重工胶黏剂层与所述第一部件分离,将所述第二重工胶黏剂层与所述第二部件分离;其中,所述解粘剂为有机溶剂或水溶剂。9.根据权利要求8所述的剥离方法,其特征在于:其中“将所述第一重工胶黏剂层与所述第一部件分离,将所述第二重工胶黏剂层与所述第二部件分离”包括拉拔分离与解粘分离;在所述第一重工胶黏剂层或所述第二重工胶黏剂层为抽拉重工胶黏剂时采用拉拔分离,在所述第一重工胶黏剂层或所述第二重工胶黏剂层为溶剂重工胶黏剂时采用解粘分离。10.根据权利要求8所述的剥离方法,其特征在于:所述预设时长为0min~60min。
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