CN110835503A - Foaming pressure-sensitive adhesive tape and preparation method thereof - Google Patents
Foaming pressure-sensitive adhesive tape and preparation method thereof Download PDFInfo
- Publication number
- CN110835503A CN110835503A CN201911113604.6A CN201911113604A CN110835503A CN 110835503 A CN110835503 A CN 110835503A CN 201911113604 A CN201911113604 A CN 201911113604A CN 110835503 A CN110835503 A CN 110835503A
- Authority
- CN
- China
- Prior art keywords
- sensitive adhesive
- pressure
- layer
- foaming
- acrylic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004820 Pressure-sensitive adhesive Substances 0.000 title claims abstract description 151
- 238000005187 foaming Methods 0.000 title claims abstract description 74
- 238000002360 preparation method Methods 0.000 title abstract description 18
- 239000010410 layer Substances 0.000 claims abstract description 129
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 57
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 114
- 239000011248 coating agent Substances 0.000 claims description 49
- 238000000576 coating method Methods 0.000 claims description 49
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 37
- 229920002635 polyurethane Polymers 0.000 claims description 37
- 239000004814 polyurethane Substances 0.000 claims description 37
- 239000006260 foam Substances 0.000 claims description 33
- 229920002799 BoPET Polymers 0.000 claims description 25
- 239000005056 polyisocyanate Substances 0.000 claims description 18
- 229920001228 polyisocyanate Polymers 0.000 claims description 18
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 16
- 239000011496 polyurethane foam Substances 0.000 claims description 16
- 230000001070 adhesive effect Effects 0.000 claims description 13
- 239000004005 microsphere Substances 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 10
- 239000003292 glue Substances 0.000 claims description 8
- 239000004088 foaming agent Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000003431 cross linking reagent Substances 0.000 claims description 3
- 239000003085 diluting agent Substances 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 239000002390 adhesive tape Substances 0.000 abstract description 15
- 238000013461 design Methods 0.000 abstract description 4
- 238000009776 industrial production Methods 0.000 abstract description 2
- 239000005020 polyethylene terephthalate Substances 0.000 abstract 2
- -1 polyethylene terephthalate Polymers 0.000 abstract 1
- 239000012528 membrane Substances 0.000 description 27
- 230000035939 shock Effects 0.000 description 19
- 229920002545 silicone oil Polymers 0.000 description 14
- 239000003822 epoxy resin Substances 0.000 description 8
- 229920000647 polyepoxide Polymers 0.000 description 8
- 229920000297 Rayon Polymers 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 230000006872 improvement Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000003245 working effect Effects 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
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/255—Polyesters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/32—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof from compositions containing microballoons, e.g. syntactic foams
-
- 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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
-
- 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
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
-
- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
-
- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
-
- 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
- C09J2467/00—Presence of polyester
- C09J2467/005—Presence of polyester in the release coating
-
- 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
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester 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
- C09J2475/00—Presence of polyurethane
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesive Tapes (AREA)
Abstract
The invention relates to the technical field of adhesive tapes, in particular to a foaming pressure-sensitive adhesive tape and a preparation method thereof, wherein the foaming pressure-sensitive adhesive tape comprises a first release film layer, a first pressure-sensitive adhesive layer, a closed-cell foaming layer, a PET (polyethylene terephthalate) layer, a second pressure-sensitive adhesive layer and a second release film layer which are sequentially arranged from top to bottom, has a simple structure and reasonable design, has high buffer rate (28%) and super-strong impact resistance, can bear energy impact of more than 800mJ, and has waterproof and dustproof performances reaching IP68 grade; the preparation method of the invention has simple process and easy preparation, and meets the requirement of industrial production.
Description
Technical Field
The invention relates to the technical field of adhesive tapes, in particular to a foaming pressure-sensitive adhesive tape and a preparation method thereof.
Background
Pressure sensitive adhesives are adhesives that adhere strongly to an adherend with the application of light pressure without the aid of solvents, heat or other means. It features easy adhesion, easy peeling, and long-term adhesion, so it is also called as pressure-sensitive adhesive. Due to the characteristics of the pressure-sensitive adhesive, the products are widely applied to the fields of packaging, printing, medical treatment, household electrical industry, manufacturing industry and the like.
Pressure sensitive adhesives are of a wide variety and can be classified into a variety of types according to different classification criteria. The general classification is that the main materials of the pressure-sensitive adhesive are divided into two categories, namely rubber series and resin series according to the components of the main materials of the pressure-sensitive adhesive, and further can be further divided into rubber type pressure-sensitive adhesives, thermoplastic elastomer type pressure-sensitive adhesives, acrylate type pressure-sensitive adhesives, organic silicon type pressure-sensitive adhesives, polyurethane type pressure-sensitive adhesives and the like. The foamed pressure-sensitive adhesive in the thermoplastic elastomer pressure-sensitive adhesive has physical state changing with temperature change in certain temperature range and unchanged chemical characteristic, is non-toxic and odorless, belongs to environment friendly chemical product and is widely applied in electronic industry.
The traditional foaming pressure-sensitive adhesive tape is mostly made by coating common PE foam with acrylic pressure-sensitive adhesive, the impact resistance is poor, the waterproof performance has great risk, the comprehensive performance of the adhesive is poor, the adhesive performance of the product is greatly reduced after a high-strength environment test, the repair performance is general, and the requirements of the existing electronic product on high waterproof performance, high buffer rate and excellent repair performance cannot be met.
In view of the above technical problems, there is a need to provide a new foamed pressure sensitive adhesive tape to better solve the above technical problems.
Disclosure of Invention
In order to solve the problems, the invention provides the foaming pressure-sensitive adhesive tape and the preparation method thereof, and the adhesive tape has the advantages of simple structure, reasonable design and good use effect; the preparation method of the invention has simple process and easy preparation, and meets the requirement of industrialized production and manufacturing.
The technical scheme adopted by the invention is as follows:
the utility model provides a foaming pressure sensitive adhesive tape, includes from last to down set gradually first from type rete, first pressure sensitive adhesive layer, obturator foaming layer, PET layer, second pressure sensitive adhesive layer and second from type rete.
The technical scheme is further improved in that the closed-cell foaming layer comprises a polyurethane closed-cell foaming layer and an acrylic acid closed-cell foaming layer, the polyurethane closed-cell foaming layer is arranged close to the first pressure-sensitive adhesive layer, and the acrylic acid closed-cell foaming layer is arranged close to the PET layer.
The further improvement of the technical proposal is that,
the acrylic closed-cell foaming layer is prepared from an acrylic prepolymer, a photoactive diluent, a photoinitiator ABP and a foaming agent FN-80SDE in a mass ratio of 100: 20: 0.6: 1.5, irradiating by using a UV lamp, wherein the energy range of the UV lamp is 800-1200mJ, and foaming on the PET film;
the polyurethane closed-cell foaming layer is prepared from polyurethane pressure-sensitive adhesive PA-200H, a microsphere foaming agent FN-80SDE and a crosslinking agent PAD-200 in a mass ratio of 100: 1.5: 1.2, foaming on the acrylic closed-cell foaming layer at the temperature of 160-180 ℃.
The technical proposal is further improved in that the thickness of the polyurethane foaming layer is set to be 25-50 um, and the density of the polyurethane foaming layer is set to be 0.63-0.83 g/cm3。
The technical proposal is further improved in that the thickness of the acrylic acid foaming layer is set to be 70-100 um, and the density of the acrylic acid foaming layer is set to be 0.52-0.62 g/cm3。
The further improvement to above-mentioned technical scheme is that, first pressure sensitive adhesive layer establishes to modified acrylic acid pressure sensitive adhesive layer, and the thickness of first pressure sensitive adhesive layer establishes to 80 ~ 100um, and the second pressure sensitive adhesive layer establishes to thermal reaction viscidity type acrylic acid pressure sensitive adhesive layer, and the thickness of second pressure sensitive adhesive layer establishes to 60 um.
The further improvement to above-mentioned technical scheme is that, the PET layer is established to black printing PET thin layer, and the thickness on PET layer is established to 12 ~ 50 um.
The further improvement to above-mentioned technical scheme does, and is first from type membrane and second to establish respectively to transparent PET silicon oil from type membrane, and first thickness from type membrane is established to 50um, and the second is established to 75um from type membrane's thickness.
The preparation method of the foaming pressure-sensitive adhesive tape comprises the following steps:
the method comprises the following steps: preparing a black printed PET film;
step two: coating a thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive on one surface of the black printed PET film;
step three: coating closed-cell acrylic acid foaming glue on the other side of the black printed PET film;
step four: coating polyurethane pressure-sensitive adhesive on the closed-cell acrylic acid foaming adhesive;
step five: coating a modified acrylic pressure-sensitive adhesive on the polyurethane pressure-sensitive adhesive;
step six: and arranging a release film to obtain the foamed pressure-sensitive adhesive tape.
The technical proposal is further improved in that the thermal reaction viscosity-reducing acrylic pressure-sensitive adhesive coated in the step three is prepared by mixing the thermal reaction viscosity-reducing acrylic pressure-sensitive adhesive and polyisocyanate according to the proportion of 100: 1.0-1.8 of the mixture; after the polyurethane pressure-sensitive adhesive is coated in the fourth step, closed-cell foaming is carried out through the microsphere particles; the modified acrylic pressure-sensitive adhesive coated in the step five is prepared from the following components in parts by weight of 100: 0.4-0.5: 0.6-1.0, respectively.
The invention has the following beneficial effects:
1. the foamed pressure-sensitive adhesive tape comprises a first release film layer, a first pressure-sensitive adhesive layer, a closed-cell foamed layer, a PET layer, a second pressure-sensitive adhesive layer and a second release film layer which are sequentially arranged from top to bottom, has simple structure and reasonable design, has high buffer rate (28%), has super-strong impact resistance, can bear energy impact of more than 800mJ, and has waterproof and dustproof performances reaching IP68 level, the foamed pressure-sensitive adhesive tape controls the whole peeling force, temperature resistance and thermal reaction viscosity reduction performances of the adhesive tape by arranging the closed-cell foamed layer as a shock wave absorbing layer and a waterproof buffer layer, using a PET film as a shock wave dispersing layer, respectively coating the pressure-sensitive adhesive layers on two sides of the closed-cell foamed layer, controlling the whole waterproof performance and the buffer rate of the adhesive tape by adjusting the thickness, the density and the elastic modulus of the closed-cell foamed layer, and achieving the purpose of dispersing the shock wave by using the PET layer, so that the whole adhesive tape has super-strong shock resistance.
2. The preparation scheme of the invention has simple process and easy preparation, and meets the requirement of industrial production and manufacturing.
Drawings
FIG. 1 is a schematic structural view of the present invention;
description of reference numerals: 1. the adhesive comprises a first release film, a 2-first pressure-sensitive adhesive layer, a 3-closed cell foaming layer, a 31-polyurethane closed cell foaming layer, a 32-acrylic closed cell foaming layer, a 4-PET layer, a 5-second pressure-sensitive adhesive layer and a 6-second release film layer.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in figure 1, the foaming pressure-sensitive adhesive tape comprises a first release film layer, a first pressure-sensitive adhesive layer, a closed-cell foaming layer, a PET layer, a second pressure-sensitive adhesive layer and a second release film layer which are sequentially arranged from top to bottom, has simple structure, reasonable design and high buffer rate (28%), has super-strong impact resistance, can bear energy impact of more than 800mJ, and has waterproof and dustproof performances reaching IP68 level, the invention controls the whole peeling force of the adhesive tape, the temperature resistance and the thermal reaction viscosity reduction performance by arranging the closed-cell foaming layer as a shock wave absorbing layer and a waterproof buffer layer, uses a PET film as a shock wave dispersing layer, respectively coats the pressure-sensitive adhesive layers on two sides of the closed-cell foaming layer, controls the whole waterproof performance and the buffer rate of the adhesive tape by adjusting the thickness, the density and the elastic modulus of the closed-cell foaming layer, and achieves the purpose of dispersing the shock wave by using the PET layer in the middle, so that the whole adhesive tape has super-strong shock resistance.
The closed-cell foaming layer comprises a polyurethane closed-cell foaming layer and an acrylic acid closed-cell foaming layer, the polyurethane closed-cell foaming layer is arranged close to the first pressure-sensitive adhesive layer, and the acrylic acid closed-cell foaming layer is arranged close to the PET layer, specifically, in the embodiment, the acrylic acid closed-cell foaming layer uses an acrylic acid prepolymer, an optical activity diluent, a photoinitiator ABP and a foaming agent FN-80SDE, and the mass ratio is 100: 20: 0.6: 1.5, irradiating by using a UV lamp with the energy range of 800-Forming; the polyurethane closed-cell foaming layer is prepared from polyurethane pressure-sensitive adhesive PA-200H, a microsphere foaming agent FN-80SDE and a crosslinking agent PAD-200 in a mass ratio of 100: 1.5: 1.2, under the temperature of 160-180 ℃, foaming on the acrylic closed-cell foaming layer, in the embodiment, the thickness of the polyurethane foaming layer is set to be 25-50 um, and the density of the polyurethane foaming layer is set to be 0.63-0.83 g/cm3The thickness of the acrylic acid foaming layer is set to be 70-100 um, and the density of the acrylic acid foaming layer is set to be 0.52-0.62 g/cm3In the present embodiment, specifically, a closed-cell foamed polyurethane foam and a closed-cell foamed acrylic foam are provided as the shock wave absorbing layer and the waterproof cushion layer, and a PET film is used as the shock wave.
The first pressure-sensitive adhesive layer is a modified acrylic acid pressure-sensitive adhesive layer, the thickness of the first pressure-sensitive adhesive layer is set to be 80-100 um, the thickness of the second pressure-sensitive adhesive layer is set to be a thermal reaction viscosity reduction type acrylic acid pressure-sensitive adhesive layer, and the thickness of the second pressure-sensitive adhesive layer is set to be 60 um.
The PET layer is a black printing PET film layer, the thickness of the PET layer is 12-50 um, in the embodiment, the PET film is used as a shock wave dispersing layer, and through experiments, the 25um black printing PET film can enable the adhesive tape to bear energy impact larger than 800mJ, so that the shock resistance of the invention is effectively ensured.
First from type membrane and second to establish respectively to transparent PET silicone oil from type membrane, first thickness from type membrane is established to 50um, and the second is established to 75um from type membrane's thickness, and from type membrane through all using PET silicone oil on sticky tape both sides, effectively keeps the stable performance and the sticky tape cross cutting performance of sticky tape, uses and processing convenience.
The preparation method of the foaming pressure-sensitive adhesive tape comprises the following steps:
the method comprises the following steps: preparing a black printed PET film;
step two: coating a thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive on one surface of the black printed PET film;
step three: coating closed-cell acrylic acid foaming glue on the other side of the black printed PET film;
step four: coating polyurethane pressure-sensitive adhesive on the closed-cell acrylic acid foaming adhesive;
step five: coating a modified acrylic pressure-sensitive adhesive on the polyurethane pressure-sensitive adhesive;
step six: and arranging a release film to obtain the foamed pressure-sensitive adhesive tape.
Wherein: the thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive coated in the step three is prepared by mixing the thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive and polyisocyanate according to the ratio of 100: 1.0-1.8 of the mixture; after the polyurethane pressure-sensitive adhesive is coated in the fourth step, closed-cell foaming is carried out through the microsphere particles; the modified acrylic pressure-sensitive adhesive coated in the step five is prepared from the following components in parts by weight of 100: 0.4-0.5: 0.6-1.0, respectively.
The following is further illustrated by means of several specific preparation examples:
scheme example 1:
① preparing 12um black printed PET film as shock wave dispersing layer;
② coating 60um thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive on one side of 12um black printing PET, wherein the ratio of the thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive to polyisocyanate is 100: 1.0;
③ coating closed-cell acrylic foam glue on the other side of 12um black printed PET, the acrylic foam has a thickness of 70um and a density of 0.52g/cm3；
④ coating polyurethane pressure sensitive adhesive on acrylic foam, performing closed cell foaming with the microsphere particles, wherein the polyurethane foam has a thickness of 25um and a density of 0.63g/cm3；
⑤ coating special modified acrylic pressure-sensitive adhesive with super strong performance on the polyurethane foam body, wherein the ratio of the special modified acrylic pressure-sensitive adhesive to polyisocyanate to epoxy resin is 100: 0.4: 0.6, and the coating thickness is 80 um;
⑥ sticky tape both sides set up PET respectively and leave the type membrane, fall the viscose one side near thermal reaction and set up 75um transparent PET silicone oil and leave the type membrane, are close to modified acrylic acid pressure sensitive adhesive one side and set up 50um transparent PET silicone oil and leave the type membrane.
Scheme example 2:
① preparing 12um black printed PET film as shock wave dispersing layer;
② coating 60um thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive on one side of 12um black printing PET, wherein the ratio of the thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive to polyisocyanate is 100: 1.2;
③ coating closed-cell acrylic foam glue on the other side of 12um black printed PET, the acrylic foam has a thickness of 70um and a density of 0.52g/cm3；
④ coating polyurethane pressure sensitive adhesive on acrylic foam, performing closed cell foaming with the microsphere particles, wherein the polyurethane foam has a thickness of 25um and a density of 0.73g/cm3；
⑤ coating special modified acrylic pressure-sensitive adhesive with super strong performance on the polyurethane foam body, wherein the ratio of the special modified acrylic pressure-sensitive adhesive to polyisocyanate to epoxy resin is 100: 0.4: 0.8, and the coating thickness is 80 um;
⑥ sticky tape both sides set up PET respectively and leave the type membrane, fall the viscose one side near thermal reaction and set up 75um transparent PET silicone oil and leave the type membrane, are close to modified acrylic acid pressure sensitive adhesive one side and set up 50um transparent PET silicone oil and leave the type membrane.
Scheme example 3:
preparation of thermal reaction viscosity-reducing waterproof acrylic foam pressure-sensitive adhesive tape
① preparing 25um black printed PET film as shock wave dispersing layer;
② coating 60um thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive on one side of 25um black printing PET, wherein the ratio of the thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive to polyisocyanate is 100: 1.4;
③ coating closed-cell acrylic foam glue on the other side of 25um black printed PET, the acrylic foam has a thickness of 80um and a density of 0.62g/cm3；
④ coating polyurethane pressure-sensitive adhesive on acrylic foamThe ball particles are subjected to closed cell foaming, the thickness of the polyurethane foam is 30um, and the density of the polyurethane foam is 0.83g/cm3；
⑤ coating special modified acrylic pressure-sensitive adhesive with super strong performance on the polyurethane foam body, wherein the ratio of the special modified acrylic pressure-sensitive adhesive to polyisocyanate to epoxy resin is 100: 0.4: 1.0, and the coating thickness is 90 um;
⑥ sticky tape both sides set up PET respectively and leave the type membrane, fall the viscose one side near thermal reaction and set up 75um transparent PET silicone oil and leave the type membrane, are close to modified acrylic acid pressure sensitive adhesive one side and set up 50um transparent PET silicone oil and leave the type membrane.
Scheme example 4:
preparation of thermal reaction viscosity-reducing waterproof acrylic foam pressure-sensitive adhesive tape
① preparing 25um black printed PET film as shock wave dispersing layer;
② coating 60um thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive on one side of 25um black printing PET, wherein the ratio of the thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive to polyisocyanate is 100: 1.6;
③ coating closed-cell acrylic foam glue on the other side of 25um black printed PET, the acrylic foam has a thickness of 90um and a density of 0.62g/cm3；
④ coating polyurethane pressure sensitive adhesive on acrylic foam, performing closed cell foaming with the microsphere particles, wherein the polyurethane foam has a thickness of 40um and a density of 0.83g/cm3；
⑤ coating special modified acrylic pressure-sensitive adhesive with super strong performance on the polyurethane foam body, wherein the ratio of the special modified acrylic pressure-sensitive adhesive to polyisocyanate to epoxy resin is 100: 0.5: 0.8, and the coating thickness is 90 um;
⑥ sticky tape both sides set up PET respectively and leave the type membrane, fall the viscose one side near thermal reaction and set up 75um transparent PET silicone oil and leave the type membrane, are close to modified acrylic acid pressure sensitive adhesive one side and set up 50um transparent PET silicone oil and leave the type membrane.
Scheme example 5:
preparation of thermal reaction viscosity-reducing waterproof acrylic foam pressure-sensitive adhesive tape
① preparing 25um black printed PET film as shock wave dispersing layer;
② coating 60um thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive on one side of 25um black printing PET, wherein the ratio of the thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive to polyisocyanate is 100: 1.8;
③ coating closed-cell acrylic foam glue on the other side of 25um black printed PET, wherein the acrylic foam has a thickness of 100um and a density of 0.62g/cm3；
④ coating polyurethane pressure sensitive adhesive on acrylic foam, performing closed cell foaming with the microsphere particles, wherein the polyurethane foam has a thickness of 50um and a density of 0.83g/cm3；
⑤ coating special modified acrylic pressure sensitive adhesive with super strong performance on the polyurethane foam body, wherein the ratio of the special modified acrylic pressure sensitive adhesive to polyisocyanate to epoxy resin is 100: 0.5: 0.8, and the coating thickness is 100 um;
⑥ sticky tape both sides set up PET respectively and leave the type membrane, fall the viscose one side near thermal reaction and set up 75um transparent PET silicone oil and leave the type membrane, are close to modified acrylic acid pressure sensitive adhesive one side and set up 50um transparent PET silicone oil and leave the type membrane.
Scheme example 6:
preparation of thermal reaction viscosity-reducing waterproof acrylic foam pressure-sensitive adhesive tape
① preparing 50um black printed PET film as shock wave dispersing layer;
② coating 60um thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive on one side of 50um black printing PET, wherein the ratio of the thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive to polyisocyanate is 100: 1.6;
③ coating a closed-cell acrylic foam adhesive on the other side of the 50um black printed PET, wherein the acrylic foam has a thickness of 90um and a density of 0.62g/cm3；
④ coating polyurethane pressure sensitive adhesive on acrylic foam, performing closed cell foaming with the microsphere particles, wherein the polyurethane foam has a thickness of 40um and a density of 0.83g/cm3；
⑤ coating special modified acrylic pressure-sensitive adhesive with super strong performance on the polyurethane foam body, wherein the ratio of the special modified acrylic pressure-sensitive adhesive to polyisocyanate to epoxy resin is 100: 0.5: 0.8, and the coating thickness is 90 um;
⑥ sticky tape both sides set up PET respectively and leave the type membrane, fall the viscose one side near thermal reaction and set up 75um transparent PET silicone oil and leave the type membrane, are close to modified acrylic acid pressure sensitive adhesive one side and set up 50um transparent PET silicone oil and leave the type membrane.
The above embodiments are subjected to performance tests, in the performance tests, the ring-shaped initial adhesion is tested according to the standard GB/T31125-:
as can be seen from the table above, the foamed pressure sensitive adhesive tape prepared by the invention has good waterproof performance (IP68), and has ultrahigh buffer rate (28%) and excellent reverse working performance, and the viscosity is reduced by 80% at 80 ℃ for 5 min.
In the above embodiment, the black printed PET film is used as the shock wave dispersing layer, and experiments show that the adhesive tape can bear the energy impact of more than 800mJ by using 25um black printed PET, the invention coats the thermal reaction viscosity-reducing acrylic pressure-sensitive adhesive on one side of the PET, controls the anti-work performance and the adhesive property of the product by adjusting the ratio of the polyisocyanate to the acrylic pressure-sensitive adhesive and the coating thickness, and experiments show that the ratio of the thermal reaction viscosity-reducing acrylic pressure-sensitive adhesive to the polyisocyanate is 100: 1.2, when the coating thickness is 60um, the adhesive has excellent adhesive property and reverse working property, the stripping force can reach 45N/25mm, and the adhesive force can be reduced by 80 percent after 5min at 80 ℃, the closed-cell acrylic foam is coated on the other surface of PET, so that the waterproof property and the buffer property are provided, the overall waterproof property and the buffer rate of the adhesive tape are controlled by adjusting the thickness, the density and the elastic modulus of the acrylic foam, and experiments show that when the thickness of the acrylic foam is 90um, the density of the acrylic foam is 0.62 and the elastic modulus of the acrylic foam is 0.53, the product not only has ultrahigh buffer rate (28 percent), but also has ultrahigh waterproof property, and can reach IP68 level waterproof and dustproof; according to the invention, polyurethane pressure-sensitive adhesive is coated on the acrylic foaming body, closed-cell foaming is carried out on the microsphere particles, and experiments show that the product has excellent elongation at break which can reach 500% when the thickness of the polyurethane foaming body is 40um and the density of the polyurethane foaming body is 0.83; the super-strong modified acrylic pressure-sensitive adhesive on the polyurethane foaming body achieves the purposes of controlling the peeling force of the adhesive tape, resisting temperature and the adhesive force to PC materials by adjusting the proportion of the modified acrylic pressure-sensitive adhesive to isocyanate and epoxy resin and the coating thickness, and is prepared by using a special modified acrylic pressure-sensitive adhesive through experiments: polyisocyanate: the epoxy resin is 100: 0.5: when the thickness of the coating is 0.8 um, the comprehensive performance of the product is optimal when the coating thickness is 80um-100um, the peeling force can reach 50N/25mm, and the holding force of 1kg can keep 168 hours at 90 ℃ without falling; the PET release films are used on both sides of the adhesive tape, so that the stable performance and the die cutting performance of the adhesive tape are effectively maintained.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a foaming pressure sensitive adhesive tape which characterized in that includes from last first release film layer, first pressure sensitive adhesive layer, obturator foaming layer, PET layer, second pressure sensitive adhesive layer and the second that sets gradually extremely down from type rete.
2. The foamed pressure-sensitive adhesive tape according to claim 1, wherein the closed cell foam layer comprises a polyurethane closed cell foam layer and an acrylic closed cell foam layer, the polyurethane closed cell foam layer is disposed adjacent to the first pressure-sensitive adhesive layer, and the acrylic closed cell foam layer is disposed adjacent to the PET layer.
3. The foamed pressure-sensitive adhesive tape according to claim 2,
the acrylic closed-cell foaming layer is prepared from an acrylic prepolymer, a photoactive diluent, a photoinitiator ABP and a foaming agent FN-80SDE in a mass ratio of 100: 20: 0.6: 1.5, irradiating by using a UV lamp, wherein the energy range of the UV lamp is 800-1200mJ, and foaming on the PET film;
the polyurethane closed-cell foaming layer is prepared from polyurethane pressure-sensitive adhesive PA-200H, a microsphere foaming agent FN-80SDE and a crosslinking agent PAD-200 in a mass ratio of 100: 1.5: 1.2, foaming on the acrylic closed-cell foaming layer at the temperature of 160-180 ℃.
4. The foamed pressure-sensitive adhesive tape according to claim 2, wherein the thickness of the polyurethane foam layer is set to 25 to 50 μm, and the density of the polyurethane foam layer is set to 0.63 to 0.83g/cm3。
5. The foamed pressure-sensitive adhesive tape according to claim 2, wherein the thickness of the acrylic foamed layer is set to 70 to 100 μm, and the density of the acrylic foamed layer is set to 0.52 to 0.62g/cm3。
6. The foamed pressure-sensitive adhesive tape according to claim 1, wherein the first pressure-sensitive adhesive layer is a modified acrylic pressure-sensitive adhesive layer, and the thickness of the first pressure-sensitive adhesive layer is 80 to 100 μm; the second pressure-sensitive adhesive layer is set as a thermal reaction viscosity-reducing acrylic pressure-sensitive adhesive layer, and the thickness of the second pressure-sensitive adhesive layer is set as 60 um.
7. The foamed pressure-sensitive adhesive tape according to claim 1, wherein the PET layer is a black printed PET film layer, and the thickness of the PET layer is 12 to 50 μm.
8. The foamed pressure-sensitive adhesive tape according to claim 1, wherein the first release film and the second release film are respectively a transparent PET silicone release film, the first release film has a thickness of 50um, and the second release film has a thickness of 75 um.
9. The process for preparing a foamed pressure-sensitive adhesive tape according to any one of claims 1 to 8, comprising the steps of:
the method comprises the following steps: preparing a black printed PET film;
step two: coating a thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive on one surface of the black printed PET film;
step three: coating closed-cell acrylic acid foaming glue on the other side of the black printed PET film;
step four: coating polyurethane pressure-sensitive adhesive on the closed-cell acrylic acid foaming adhesive;
step five: coating a modified acrylic pressure-sensitive adhesive on the polyurethane pressure-sensitive adhesive;
step six: and arranging a release film to obtain the foamed pressure-sensitive adhesive tape.
10. The process for producing a foamed pressure-sensitive adhesive tape according to claim 9,
the thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive coated in the step three is prepared by mixing the thermal reaction viscosity-reducing acrylic acid pressure-sensitive adhesive and polyisocyanate according to the ratio of 100: 1.0-1.8 of the mixture;
after the polyurethane pressure-sensitive adhesive is coated in the fourth step, closed-cell foaming is carried out through the microsphere particles;
the modified acrylic pressure-sensitive adhesive coated in the step five is prepared from the following components in parts by weight of 100: 0.4-0.5: 0.6-1.0, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911113604.6A CN110835503B (en) | 2019-11-14 | 2019-11-14 | Foaming pressure-sensitive adhesive tape and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911113604.6A CN110835503B (en) | 2019-11-14 | 2019-11-14 | Foaming pressure-sensitive adhesive tape and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110835503A true CN110835503A (en) | 2020-02-25 |
| CN110835503B CN110835503B (en) | 2023-12-29 |
Family
ID=69576401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911113604.6A Active CN110835503B (en) | 2019-11-14 | 2019-11-14 | Foaming pressure-sensitive adhesive tape and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110835503B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111518482A (en) * | 2020-05-06 | 2020-08-11 | 广东弘擎电子材料科技有限公司 | High-performance acrylic acid foaming body adhesive tape and preparation method thereof |
| CN111777962A (en) * | 2020-07-22 | 2020-10-16 | 太仓斯迪克新材料科技有限公司 | Waterproof adhesive tape, preparation method thereof and electronic product |
| CN113004821A (en) * | 2021-03-12 | 2021-06-22 | 衡山县佳诚新材料有限公司 | Acrylic buffer foam and preparation process thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090011221A1 (en) * | 2005-02-14 | 2009-01-08 | Hiromasa Kawaguchi | Cushioning Material for a Polishing Pad |
| CN108384471A (en) * | 2018-02-02 | 2018-08-10 | 苏州德佑胶带技术有限公司 | One kind can heavy industry adhesive tape and preparation method thereof |
| CN108795307A (en) * | 2018-07-04 | 2018-11-13 | 东莞市古川胶带有限公司 | A kind of very thin double faced adhesive tape and preparation method thereof |
| CN109867894A (en) * | 2018-12-28 | 2019-06-11 | 广西大学 | A kind of high temperature resistant UV aggretion type ontology foaming damping material and preparation method thereof |
| CN209428449U (en) * | 2018-11-08 | 2019-09-24 | 中山新亚洲胶粘制品有限公司 | A kind of foam tape |
| CN211814230U (en) * | 2019-11-14 | 2020-10-30 | 广东弘擎电子材料科技有限公司 | Foaming pressure-sensitive adhesive tape |
-
2019
- 2019-11-14 CN CN201911113604.6A patent/CN110835503B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090011221A1 (en) * | 2005-02-14 | 2009-01-08 | Hiromasa Kawaguchi | Cushioning Material for a Polishing Pad |
| CN108384471A (en) * | 2018-02-02 | 2018-08-10 | 苏州德佑胶带技术有限公司 | One kind can heavy industry adhesive tape and preparation method thereof |
| CN108795307A (en) * | 2018-07-04 | 2018-11-13 | 东莞市古川胶带有限公司 | A kind of very thin double faced adhesive tape and preparation method thereof |
| CN209428449U (en) * | 2018-11-08 | 2019-09-24 | 中山新亚洲胶粘制品有限公司 | A kind of foam tape |
| CN109867894A (en) * | 2018-12-28 | 2019-06-11 | 广西大学 | A kind of high temperature resistant UV aggretion type ontology foaming damping material and preparation method thereof |
| CN211814230U (en) * | 2019-11-14 | 2020-10-30 | 广东弘擎电子材料科技有限公司 | Foaming pressure-sensitive adhesive tape |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111518482A (en) * | 2020-05-06 | 2020-08-11 | 广东弘擎电子材料科技有限公司 | High-performance acrylic acid foaming body adhesive tape and preparation method thereof |
| CN111518482B (en) * | 2020-05-06 | 2022-03-25 | 广东弘擎电子材料科技有限公司 | High-performance acrylic acid foaming body adhesive tape and preparation method thereof |
| CN111777962A (en) * | 2020-07-22 | 2020-10-16 | 太仓斯迪克新材料科技有限公司 | Waterproof adhesive tape, preparation method thereof and electronic product |
| CN113004821A (en) * | 2021-03-12 | 2021-06-22 | 衡山县佳诚新材料有限公司 | Acrylic buffer foam and preparation process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110835503B (en) | 2023-12-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110835503A (en) | Foaming pressure-sensitive adhesive tape and preparation method thereof | |
| CN104130726B (en) | The cut-out processing method of release adhesive compositions, bonding sheet and electronic unit again | |
| JP6525961B2 (en) | Acrylic foam adhesive tape and flat panel display using the same | |
| CN211814230U (en) | Foaming pressure-sensitive adhesive tape | |
| CN112662326B (en) | Grid foam adhesive tape for damping OLED display device and preparation method thereof | |
| US20110250446A1 (en) | Pressure-sensitive adhesive composition and acrylic pressure-sensitive adhesive tape | |
| CN108795307B (en) | Ultrathin double-sided adhesive tape and preparation method thereof | |
| US11168236B2 (en) | Acrylic pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet | |
| KR101993803B1 (en) | Double-sided adhesive tape for display, mehod of the same and display device | |
| CN108239489B (en) | Manufacturing method of PET (polyethylene terephthalate) exhaust adhesive film and PET exhaust adhesive film | |
| CN112680135A (en) | Support film for OLED module and preparation method thereof | |
| CN113969115B (en) | Rapid leveling ultrathin grid adhesive tape and preparation method thereof | |
| CN103249555A (en) | Laminate | |
| CN107312492B (en) | Dual-curing adhesive and adhesive tape | |
| CN106753162A (en) | A kind of preparation method of peelable type polyurethane pressure sensitive adhesive | |
| US20180016481A1 (en) | Graphite pressure-sensitive adhesive tape with release liner | |
| CN110467889B (en) | Steel plate laminated adhesive capable of being laminated at low temperature, preparation method thereof and hot melt adhesive film | |
| CN110791211A (en) | Full-shading PET base film double-sided adhesive tape and preparation method thereof | |
| CN116042107A (en) | Acrylic foam adhesive tape resistant to high-temperature and high-humidity environment and preparation method thereof | |
| CN113637204B (en) | Solar cell back film | |
| CN113025242A (en) | Pressure-sensitive adhesive composition and acrylic foam adhesive tape with same | |
| CN113652176B (en) | Thick adhesive type double-sided adhesive tape, preparation method thereof, notebook computer fan edge pasting method and notebook computer | |
| CN216005728U (en) | Biodegradable optical protective film | |
| CN218842017U (en) | Sustainable foam adhesive tape coiled material and bonding assembly | |
| CN214781599U (en) | Modified acrylic acid coated double-sided adhesive film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |