CN115386308A - Double-sided adhesive tape capable of being stretched and removed and not rebounded and preparation method thereof - Google Patents

Double-sided adhesive tape capable of being stretched and removed and not rebounded and preparation method thereof Download PDF

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Publication number
CN115386308A
CN115386308A CN202211133889.1A CN202211133889A CN115386308A CN 115386308 A CN115386308 A CN 115386308A CN 202211133889 A CN202211133889 A CN 202211133889A CN 115386308 A CN115386308 A CN 115386308A
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China
Prior art keywords
double
styrene
adhesive
adhesive tape
pressure
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CN202211133889.1A
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Chinese (zh)
Inventor
顾正青
赵欣欣
周奎任
计建荣
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Suzhou Shihua New Material Technology Co ltd
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Suzhou Shihua New Material Technology Co ltd
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Priority to CN202211133889.1A priority Critical patent/CN115386308A/en
Publication of CN115386308A publication Critical patent/CN115386308A/en
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    • 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
    • C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/241—Polyolefin, e.g.rubber
    • C09J7/243—Ethylene or propylene 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
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08—Macromolecular additives
    • 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
    • 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
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
    • C09J2301/408—Additional features of adhesives in the form of films or foils characterized by the presence of essential components additives as essential feature of the adhesive layer
    • 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
    • C09J2423/00—Presence of polyolefin
    • C09J2423/04—Presence of homo or copolymers of ethene
    • C09J2423/046—Presence of homo or copolymers of ethene 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
    • C09J2425/00—Presence of styrenic polymer
    • C09J2425/006—Presence of styrenic polymer 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
    • C09J2475/006—Presence of polyurethane in the substrate

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Adhesive Tapes (AREA)

Abstract

The invention relates to the technical field of adhesive tape preparation, in particular to a double-sided adhesive tape capable of being stretched and removed and not rebounding and a preparation method thereof. According to the invention, a 50-400 mu m elastomer modified polyolefin film is used as a middle base material, 10-110 mu m pressure-sensitive adhesive is attached to two sides of the middle base material, a special adhesive is grafted into the pressure-sensitive adhesive through ultraviolet curing, the pressure-sensitive adhesive can fully react with the middle base material after being attached, the adhesiveness between a face adhesive and the middle base material is increased, the face adhesive is tightly combined with the middle base material, and finally antistatic release films are attached to the surfaces of the pressure-sensitive adhesives on the two sides to prepare the double-sided adhesive tape; the double-sided adhesive tape disclosed by the invention can realize deformation of the stretched adhesive tape, but the double-sided adhesive tape does not rebound and has a certain elongation, the shape of the stretched adhesive tape cannot be recovered, and the double-sided adhesive tape can be quickly removed after being stretched, so that the double-sided adhesive tape is practical and attractive, and the user experience is improved.

Description

Double-sided adhesive tape capable of being stretched and removed and not rebounded and preparation method thereof
Technical Field
The invention relates to the technical field of adhesive tape preparation, in particular to a double-sided adhesive tape capable of being stretched and removed and not rebounding and a preparation method thereof.
Background
In recent years, electronic products such as mobile phones and tablet computers are updated more and more quickly, users have higher and higher requirements on lightness, thinness and delicacy of the products, and pay more and more attention to the use experience of the products, and as an indispensable adhesive tape in the electronic products, the requirements on functions and experience are higher and higher, the adhesive tape can be roughly divided into a high-temperature adhesive tape, a double-sided adhesive tape, an insulating adhesive tape, a special adhesive tape, a pressure-sensitive adhesive tape and a die-cutting adhesive tape, wherein the double-sided adhesive tape is widely applied;
at present, a large part of adhesive tapes on the market have better strength and can achieve certain elongation, but for products which are relatively delicate and have small attached object areas, the long elongation is not necessary, and on the contrary, the long elongation can cause users to feel that the use experience is not good, so that the adhesive tapes which do not rebound after being stretched and can be quickly removed from the surfaces of the attached objects and can be reworked are imperative.
Disclosure of Invention
The present invention is directed to a double-sided tape which can be removed by stretching and does not bounce and a method for manufacturing the same, so as to solve the problems of the related art. Can realize tensile back sticky tape promptly and take place to warp, nevertheless do not bounce-back, have certain extension, extension back sticky tape shape can not resume, and can remove fast after tensile, not only practical but also pleasing to the eye, improves user experience.
In order to solve the technical problems, the invention provides the following technical scheme:
a stretch removable and non-resilient double-sided adhesive tape comprising an intermediate substrate, a pressure sensitive adhesive, an antistatic release film; the double-sided tape takes the middle base material as a central film, and the pressure-sensitive adhesive and the anti-static release film are sequentially adhered to the two sides from inside to outside.
In an optimized scheme, the intermediate substrate is an elastomer modified polyolefin film; the content of the elastomer in the intermediate base material is 5 to 20 percent by mass percent; the polyolefin is one or more of polyethylene, polypropylene, polybutylene and cycloolefine.
In the scheme, the polyolefin film has the tensile strength of 60-100Mpa, the elongation at break of 50-200%, the Shore D hardness of 60-80 and the density of 0.82g/cm 3 -0.99g/cm 3 。
In a more optimized scheme, the elastomer is one or more of a polyurethane thermoplastic elastomer (TPU), styrene-butadiene-styrene (SBS), styrene-ethylene-styrene (SEBS), styrene-isoprene-styrene (SIS), natural rubber, ethylene propylene rubber, styrene butadiene rubber and nitrile butadiene rubber.
According to an optimized scheme, the pressure-sensitive adhesive is one or more of acrylate pressure-sensitive adhesives, thermoplastic elastomer pressure-sensitive adhesives, rubber pressure-sensitive adhesives and organic silicon pressure-sensitive adhesives.
According to an optimized scheme, the pressure-sensitive adhesive comprises main body glue and a solvent A, wherein the mass ratio of the main body glue to the solvent A is 1: 0.3-1;
the main glue comprises the following components: according to the mass portion, 45-83 portions of matrix resin or matrix rubber, 5-50 portions of tackifying resin, 1-5 portions of antioxidant and 0-7 portions of curing agent.
The matrix resin is one or more of butyl acrylate, methyl methacrylate, butyl methacrylate, isooctyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxyethyl acrylate, hydroxypropyl acrylate and the like.
The matrix rubber is one or more of natural rubber, styrene-butadiene rubber, nitrile rubber, ethylene-propylene rubber, styrene-butadiene-styrene (SBS), styrene-ethylene-styrene, styrene-butylene-styrene (SEBS) and styrene-isoprene-styrene (SIS).
The tackifying resin is one or more of natural rosin ester, tall oil rosin, wood rosin, hydrogenated rosin, disproportionated rosin, polymerized rosin, esterified rosin, maleated rosin, alpha-terpene resin, beta-terpene resin, terpene phenolic resin, C5, C9 petroleum resin, dicyclopentadiene resin, coumarone-indene resin, alkyl phenolic resin and xylene resin.
The antioxidant is one or more of 2,6-di-tert-butyl-4-methylphenol, tetra [ beta- (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 2,6-di-tert-butyl-p-cresol and tris (2,4-di-tert-butyl) phenyl phosphite.
The curing agent is any one or more of isocyanate crosslinking agent, epoxy crosslinking agent, metal crosslinking agent, tert-butyl peroxybenzoate, dicumyl peroxide, benzoyl peroxide and dicumyl peroxydicarbonate. The solvent A is any one of ethyl acetate or toluene.
According to an optimized scheme, in order to increase the laminating property of the middle base material and the pressure-sensitive adhesives on the two sides, the pressure-sensitive adhesives further comprise an adhesive, and the using amount of the adhesive is 1-13wt% of the main body adhesive. The adhesive is obtained by photocuring matrix resin, a solvent B, a functional monomer and a photoinitiator. The adhesive can activate active groups in the middle base material to react with active groups in the pressure-sensitive adhesive attached to the two sides of the middle base material so as to achieve the effect of increasing the adhesive force between the middle base material and the surface adhesive, and the special groups contained in the special adhesive are one or more than two of NCO groups, hydroxyl groups, carboxyl groups, ester groups, amino groups, carbamido groups and modified groups thereof.
According to an optimized scheme, the preparation method of the adhesive adopts ultraviolet curing reaction, and attention is paid to light shielding in the processes of weighing raw materials and preparing, and the specific preparation steps are as follows: and mixing the matrix resin and the solvent B, stirring, adding the functional monomer containing the special group and the photoinitiator after the matrix resin and the solvent B are completely dissolved, continuously stirring for 30-40min, and performing ultraviolet curing to obtain the adhesive.
In an optimized scheme, the matrix resin is one or more of butyl acrylate, methyl methacrylate, butyl methacrylate, isooctyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxyethyl acrylate, hydroxypropyl acrylate and the like.
The functional monomer accounts for 5-30wt% of the matrix resin, and is one or more of ethoxylated bisphenol A dimethacrylate, 2-phenylphenoxyethyl acrylate, dipentaerythritol hexaacrylate, beta-carboxypropyl acrylate, dipropylene glycol diacrylate, isobornyl acrylate, 1,6-hexanediol diacrylate and polyethylene glycol (200) diacrylate;
the dosage of the photoinitiator accounts for 2-15wt% of the matrix resin; the photoinitiator is 2,2-dimethoxy-acetophenone, alpha' -ethoxyacetophenone, 2,4,6-trimethylbenzylOne or more than two of acyl ethyl phosphate and 2-hydroxy-2-methyl-1-phenyl-1-acetone with initiation wavelength of 240-460um; the photocuring wave band is UVA wave band curing, and the photocuring energy is 200-2000mJ/cm 2 ；
The solvent B is ethyl acetate.
The antistatic release film of pressure sensitive adhesive is laminated to the scheme, so that overlarge static electricity can be prevented from being generated when the film is peeled or the film is covered, the release film is broken down, the release failure is realized, and meanwhile, a fire disaster is prevented during mass production.
The preparation method of the double-sided adhesive tape capable of being stretched and removed and not rebounded comprises the following specific preparation steps:
(1) Preparing an intermediate substrate: feeding polyolefin and elastomer into a double-screw extruder, performing melt blending, extruding and granulating, casting, flattening and drying the extruded raw materials by a forming roller, and rolling to obtain an intermediate base material;
(2) Uniformly mixing matrix resin or matrix rubber, tackifying resin, an antioxidant, a curing agent, an adhesive and a solvent A, stirring, filtering, standing and discharging bubbles to obtain the pressure-sensitive adhesive glue; placing an antistatic release film on a scraper type coating machine, taking pressure-sensitive adhesive glue for coating, uniformly coating the pressure-sensitive adhesive on the antistatic release film, drying and rolling after coating is finished, and obtaining a semi-finished product;
(3) Bonding: and respectively bonding the coated semi-finished products on two sides of the intermediate substrate, attaching one side of the intermediate substrate, which is not covered with the antistatic release film, to the surface of the intermediate substrate, and curing at 45-50 ℃ to obtain the double-sided adhesive tape.
In the optimized scheme, in the step (1), the extrusion conditions are as follows: the machine speed of the main machine is 70r/min, the feeding speed is 15r/min, the temperature of each section is 150-200 ℃, and the rotating speed of the stock cutter is controlled at 130-260r/min;
in the step (1), the thickness of the film of the intermediate substrate is 50-400um.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, an elastomer polyolefin film is used as an adhesive tape middle substrate, pressure-sensitive adhesives with special adhesives are attached to two sides of the adhesive tape middle substrate, and finally an antistatic release film is attached to obtain a stretchable removable double-sided adhesive tape; the elastic body and the polyolefin are adopted as the middle base material in the stretchable removable adhesive tape, the strength of the polyolefin and the elasticity of the elastic body are taken into consideration, the pressure-sensitive adhesive is attached to two sides, the adhesive tape can be stretched and removed when the adhesive tape needs to be removed, the operation is simple and convenient, the attached object is not damaged, the usable range of the adhesive tape is expanded due to the arrangement of the double-sided adhesive tape, and the practical practicability is enhanced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by those skilled in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
(1) In the following examples, the polyethylene particles are LD160AT produced by exxon meifu chemical industry, the thermoplastic polyurethane elastomer is EV75 produced by tokyo polyvidon science and technology gmbh, the butyl acrylate is BMG produced by kay chemical industry, the β -carboxypropyl acrylate is BMH produced by kay chemical industry, the photoinitiator 1-hydroxycyclohexyl phenyl ketone is 184 produced by kay double bond chemical industry, the tackifying resin is T803L produced by kay chemical industry, the antioxidant is 1010 produced by kyo chemical industry, the curing agent is L-75 produced by kyo chemical industry, the manufacturers of ethyl acetate and butyl acetate are runton chemical industries, the acrylic resin is LP64 produced by kyoton science and technology gmbh, the styrene thermoplastic elastomer is produced by keten science and technology gmbh and has a brand number of 1163, the polypropylene particles are produced by tokyo polyvidon science and a brand number of S01, the styrene-butadiene-styrene rubber is 4 rubber produced by ketjekto chemical industry, and the manufacturers of toluene are runton science and technology gmbh.
Example 1
(1) Preparing an intermediate substrate: according to the mass parts, 95g of polyethylene particles and 5g of thermoplastic polyurethane elastomer are taken, melted, blended, extruded and granulated by a double-screw extruder, and the extrusion conditions are as follows: the machine speed of a main machine is 70r/min, the feeding speed is 15r/min, the temperature of each section is 150-160-180-190 ℃, the rotating speed of a stock cutter is controlled at 230r/min, the extruded raw material is spread and flattened by a forming roller in a casting way, the thickness of the extruded film is 100um, and the extruded film is rolled after being dried to obtain the intermediate base material.
(2) Preparation of the adhesive: firstly, 100g of butyl acrylate is added into a reaction kettle, then 220g of butyl acetate is added, stirring is started, after the butyl acrylate and the butyl acetate are completely dissolved, 15g of beta-carboxypropyl acrylate and 5g of photoinitiator 1-hydroxy cyclohexyl phenyl ketone are added into the reaction kettle, stirring is continued for 60min, and then ultraviolet light curing is carried out, so that the adhesive containing the special functional monomer is obtained.
(3) Preparing a pressure-sensitive adhesive: 87g of acrylic resin, 8g of tackifying resin, 2g of antioxidant, 1g of curing agent, 2g of adhesive and 35g of ethyl acetate are uniformly mixed, stirred, filtered, kept stand and bubble-removed, the mixed glue is coated on a knife coater, the thickness of two sides of the release film is 25um, the machine speed is 5m/min, the temperature of each section of oven is 60-70-80-100-110-90 ℃, and the solvent is dried and then wound to obtain a semi-finished product.
(4) Bonding: and respectively bonding the coated semi-finished products on two sides of the intermediate substrate, attaching one side of the intermediate substrate, which is not covered with the antistatic release film, to the surface of the intermediate substrate, and curing at 50 ℃ to obtain the double-sided adhesive tape.
Example 2
(1) Preparing an intermediate substrate: according to the mass parts, 90g of polyethylene particles and 10g of thermoplastic polyurethane elastomer are taken, melted, blended, extruded and granulated by a double-screw extruder, and the extrusion conditions are as follows: the machine speed of a main machine is 70r/min, the feeding speed is 15r/min, the temperature of each section is 150-160-175-180 ℃, the rotating speed of a stock cutter is controlled at 220r/min, the extruded raw material is cast and flattened by a forming roller, the thickness of the extruded film is 100um, and the extruded film is rolled after being dried to obtain the intermediate base material.
(2) Preparation of the adhesive: firstly, 100g of butyl acrylate is added into a reaction kettle, then 220g of butyl acetate is added, stirring is started, after the butyl acrylate and the butyl acetate are completely dissolved, 15g of beta-carboxypropyl acrylate and 5g of photoinitiator 1-hydroxy cyclohexyl phenyl ketone are added into the reaction kettle, stirring is continued for 60min, and then ultraviolet light curing is carried out, so that the adhesive containing the special functional monomer is obtained.
(3) Preparing a pressure-sensitive adhesive: 87g of acrylic resin, 8g of tackifying resin, 2g of antioxidant, 1g of curing agent, 7g of adhesive and 35g of ethyl acetate are uniformly mixed, stirred, filtered, kept stand and bubble-removed, the mixed glue is coated on a knife coater, the thickness of two sides of the release film is 25um, the machine speed is 5m/min, the temperature of each section of oven is 60-70-80-100-110-90 ℃, and the solvent is dried and then wound to obtain a semi-finished product.
(4) Bonding: and respectively bonding the coated semi-finished products on two sides of the intermediate substrate, attaching one side of the intermediate substrate, which is not covered with the antistatic release film, to the surface of the intermediate substrate, and curing at 50 ℃ to obtain the double-sided adhesive tape.
Example 3
(1) Preparing an intermediate substrate: taking 85g of polyethylene particles and 15g of thermoplastic polyurethane elastomer according to the parts by weight, melting, blending and extruding the polyethylene particles and the thermoplastic polyurethane elastomer by a double-screw extruder for granulation, wherein the extrusion conditions are as follows: the machine speed of a main machine is 70r/min, the feeding speed is 15r/min, the temperature of each section is 150-160-175 ℃, the rotating speed of a stock cutter is controlled at 210r/min, the extruded raw material is cast and flattened by a forming roller, the thickness of the extruded film is 100um, and the extruded film is rolled after being dried to obtain the intermediate base material.
(2) Preparation of the adhesive: firstly, 100g of butyl acrylate is added into a reaction kettle, then 220g of butyl acetate is added, stirring is started, after the butyl acrylate and the butyl acetate are completely dissolved, 15g of beta-carboxypropyl acrylate and 5g of photoinitiator 1-hydroxy cyclohexyl phenyl ketone are added into the reaction kettle, stirring is continued for 60min, and then ultraviolet light curing is carried out, so that the adhesive containing the special functional monomer is obtained.
(3) Preparing a pressure-sensitive adhesive: 87g of acrylic resin, 8g of tackifying resin, 2g of antioxidant, 1g of curing agent, 12g of adhesive and 35g of ethyl acetate are uniformly mixed, stirred, filtered, kept stand and bubble-removed, the mixed glue is coated on a knife coater, the thickness of two sides of the release film is 25um, the machine speed is 5m/min, the temperature of each section of oven is 60-70-80-100-110-90 ℃, and the solvent is dried and then wound to obtain a semi-finished product.
(4) Bonding: and respectively bonding the coated semi-finished products on two sides of the intermediate substrate, attaching one side of the intermediate substrate, which is not covered with the antistatic release film, to the surface of the intermediate substrate, and curing at 50 ℃ to obtain the double-sided adhesive tape.
Example 4
(1) Preparing an intermediate substrate: taking 90g of polyethylene particles and 10g of styrene thermoplastic elastomer according to the mass parts, melting, blending and extruding the polyethylene particles and the styrene thermoplastic elastomer by a double-screw extruder for granulation, wherein the extrusion conditions are as follows: the machine speed of a main machine is 60r/min, the feeding speed is 15r/min, the temperature of each section is 150-160-165-160 ℃, the rotating speed of a stock cutter is controlled at 210r/min, the extruded raw material is cast and flattened by a forming roller, the thickness of the extruded film is 100 mu m, and the extruded film is dried and rolled to obtain the intermediate base material.
(2) Preparation of the adhesive: firstly, 100g of butyl acrylate is added into a reaction kettle, then 220g of butyl acetate is added, stirring is started, after the butyl acrylate and the butyl acetate are completely dissolved, 15g of beta-carboxypropyl acrylate and 5g of photoinitiator 1-hydroxy cyclohexyl phenyl ketone are added into the reaction kettle, stirring is continued for 60min, and then ultraviolet light curing is carried out, so that the adhesive containing the special functional monomer is obtained.
(3) Preparing a pressure-sensitive adhesive: 87g of acrylic resin, 8g of tackifying resin, 2g of antioxidant, 1g of curing agent, 7g of adhesive and 35g of ethyl acetate are uniformly mixed, stirred, filtered, kept stand and bubble-removed, the mixed glue is coated on a knife coater, the thickness of two sides of the release film is 25um, the machine speed is 5m/min, the temperature of each section of oven is 60-70-80-100-110-90 ℃, and the solvent is dried and then wound to obtain a semi-finished product.
(4) Bonding: and respectively bonding the coated semi-finished products on two sides of the intermediate substrate, adhering one side of the intermediate substrate, which is not covered with the antistatic release film, to the surface of the intermediate substrate, and curing at 50 ℃ to obtain the double-sided adhesive tape.
Example 5
(1) Preparing an intermediate substrate: according to the mass parts, 90g of polyethylene particles and 10g of thermoplastic polyurethane elastomer are taken, melted, blended, extruded and granulated by a double-screw extruder, and the extrusion conditions are as follows: the machine speed of a main machine is 70r/min, the feeding speed is 15r/min, the temperature of each section is 150-160-175-180 ℃, the rotating speed of a stock cutter is controlled at 220r/min, the extruded raw material is cast and flattened by a forming roller, the thickness of the extruded film is 100um, and the extruded film is rolled after being dried to obtain the intermediate base material.
(2) Preparation of the adhesive: firstly, 100g of butyl acrylate is added into a reaction kettle, then 220g of butyl acetate is added, stirring is started, after the butyl acrylate and the butyl acetate are completely dissolved, 15g of beta-carboxypropyl acrylate and 5g of photoinitiator 1-hydroxy cyclohexyl phenyl ketone are added into the reaction kettle, stirring is continued for 60min, and then ultraviolet light curing is carried out, so that the adhesive containing the special functional monomer is obtained.
(3) Preparing a pressure-sensitive adhesive: 47g of styrene-butadiene-styrene rubber, 51g of tackifying resin, 2g of antioxidant, 100g of toluene and 7g of adhesive are taken to be uniformly mixed, stirred, filtered, kept stand and bubble-removed, the mixed glue is coated on a knife coater, the thickness of two sides of the release film is 25 micrometers, the machine speed is 5m/min, the temperature of each drying oven is 60-70-80-105-120-90 ℃, and the solvent is dried and then wound to obtain a semi-finished product.
(4) Bonding: and respectively bonding the coated semi-finished products on two sides of the intermediate substrate, attaching one side of the intermediate substrate, which is not covered with the antistatic release film, to the surface of the intermediate substrate, and curing at 50 ℃ to obtain the double-sided adhesive tape.
Example 6
(1) Preparing an intermediate substrate: according to the mass parts, 90g of polypropylene particles and 10g of thermoplastic polyurethane elastomer are taken, melted, blended, extruded and granulated by a double-screw extruder, and the extrusion conditions are as follows: the machine speed of a main machine is 90r/min, the feeding speed is 15r/min, the temperature of each section is 160-170-185-180 ℃, the rotating speed of a stock cutter is controlled at 220r/min, the extruded raw material is spread and flattened by a forming roller in a casting way, the thickness of the extruded film is 100um, and the extruded film is rolled after being dried to obtain the intermediate base material.
(2) Preparation of the adhesive: firstly, 100g of butyl acrylate is added into a reaction kettle, then 220g of butyl acetate is added, stirring is started, after the butyl acrylate and the butyl acetate are completely dissolved, 15g of beta-carboxypropyl acrylate and 5g of photoinitiator 1-hydroxy cyclohexyl phenyl ketone are added into the reaction kettle, stirring is continued for 60min, and then ultraviolet light curing is carried out, so that the adhesive containing the special functional monomer is obtained.
(3) Preparing a pressure-sensitive adhesive: 87g of acrylic resin, 8g of tackifying resin, 2g of antioxidant, 1g of curing agent, 7g of adhesive and 35g of ethyl acetate are uniformly mixed, stirred, filtered, kept stand and bubble-removed, the mixed glue is coated on a knife coater, the thickness of two sides of the release film is 25um, the machine speed is 5m/min, the temperature of each section of oven is 60-70-80-100-110-90 ℃, and the solvent is dried and then wound to obtain a semi-finished product.
(4) Bonding: and respectively bonding the coated semi-finished products on two sides of the intermediate substrate, attaching one side of the intermediate substrate, which is not covered with the antistatic release film, to the surface of the intermediate substrate, and curing at 50 ℃ to obtain the double-sided adhesive tape.
Comparative example
Comparative example 1 example 2 was used as a control, and the parameters were changed to the addition of excess thermoplastic polyurethane elastomer in comparative example 1
(1) Preparing an intermediate substrate: taking 50g of polyethylene particles and 50g of thermoplastic polyurethane elastomer according to the mass parts, melting, blending, extruding and granulating through a double-screw extruder, wherein the extrusion conditions are as follows: the machine speed of a main machine is 70r/min, the feeding speed is 15r/min, the temperature of each section is 130-150-155-150 ℃, the rotating speed of a stock cutter is controlled at 180r/min, the extruded raw material is spread and flattened by a forming roller in a casting way, the thickness of the extruded film is 100um, and the extruded film is rolled after being dried to obtain the intermediate base material.
(2) Preparation of the adhesive: firstly, 100g of butyl acrylate is added into a reaction kettle, then 220g of butyl acetate is added, stirring is started, after the butyl acrylate and the butyl acetate are completely dissolved, 15g of beta-carboxypropyl acrylate and 5g of photoinitiator 1-hydroxy cyclohexyl phenyl ketone are added into the reaction kettle, stirring is continued for 60min, and then ultraviolet light curing is carried out, so that the adhesive containing the special functional monomer is obtained.
(3) Preparing a pressure-sensitive adhesive: 87g of acrylic resin, 8g of tackifying resin, 2g of antioxidant, 1g of curing agent, 7g of adhesive and 35g of ethyl acetate are uniformly mixed, stirred, filtered, kept stand and bubble-removed, the mixed glue is coated on a knife coater, the thickness of two sides of the release film is 25um, the machine speed is 5m/min, the temperature of each section of oven is 60-70-80-100-110-90 ℃, and the solvent is dried and then wound to obtain a semi-finished product.
(4) Bonding: and respectively bonding the coated semi-finished products on two sides of the intermediate substrate, adhering one side of the intermediate substrate, which is not covered with the antistatic release film, to the surface of the intermediate substrate, and curing at 50 ℃ to obtain the double-sided adhesive tape.
Comparative example 2 was used as a control, and the parameters were changed so that no thermoplastic polyurethane elastomer was added to comparative example 2
(1) Preparing an intermediate substrate: taking 100g of polyethylene particles according to the parts by weight, melting, blending and extruding the polyethylene particles by a double-screw extruder for granulation, wherein the extrusion conditions are as follows: the machine speed of a main machine is 70r/min, the feeding speed is 15r/min, the temperature of each section is 160-170-190-185 ℃, the rotating speed of a cutting machine is controlled at 245r/min, the extruded raw material is cast and flattened by a forming roller, the thickness of the extruded film is 100 mu m, and the extruded film is dried and rolled to obtain the intermediate base material.
(2) Preparation of the adhesive: firstly, 100g of butyl acrylate is added into a reaction kettle, then 220g of butyl acetate is added, stirring is started, after the butyl acrylate and the butyl acetate are completely dissolved, 15g of beta-carboxypropyl acrylate and 5g of photoinitiator 1-hydroxy cyclohexyl phenyl ketone are added into the reaction kettle, stirring is continued for 60min, and then ultraviolet light curing is carried out, so that the adhesive containing the special functional monomer is obtained.
(3) Preparing a pressure-sensitive adhesive: 87g of acrylic resin, 8g of tackifying resin, 2g of antioxidant, 1g of curing agent, 7g of adhesive and 35g of ethyl acetate are uniformly mixed, stirred, filtered, kept stand and bubble-removed, the mixed glue is coated on a knife coater, the thickness of two sides of the release film is 25um, the machine speed is 5m/min, the temperature of each section of oven is 60-70-80-100-110-90 ℃, and the solvent is dried and then wound to obtain a semi-finished product.
(4) Bonding: and respectively bonding the coated semi-finished products on two sides of the intermediate substrate, attaching one side of the intermediate substrate, which is not covered with the antistatic release film, to the surface of the intermediate substrate, and curing at 50 ℃ to obtain the double-sided adhesive tape.
Comparative example 3 example 2 was used as a control, and parameters were changed to comparative example 2 without adding an adhesive
(1) Preparing an intermediate substrate: according to the mass parts, 90g of polyethylene particles and 10g of thermoplastic polyurethane elastomer are taken, melted, blended, extruded and granulated by a double-screw extruder, and the extrusion conditions are as follows: the machine speed of a main machine is 70r/min, the feeding speed is 15r/min, the temperature of each section is 150-160-175-180 ℃, the rotating speed of a stock cutter is controlled at 220r/min, the extruded raw material is cast and flattened by a forming roller, the thickness of the extruded film is 100um, and the extruded film is rolled after being dried to obtain the intermediate base material.
(2) Preparing a pressure-sensitive adhesive: 87g of acrylic resin, 8g of tackifying resin, 2g of antioxidant, 1g of curing agent and 35g of ethyl acetate are uniformly mixed, stirred, filtered, stood and bubble-removed, the mixed glue is coated on a knife coater, the thickness of the mixed glue is 25um on both sides of a release film, the machine speed is 5m/min, the temperature of each drying oven is 60-70-80-100-110-90 ℃, and the solvent is dried and then wound to obtain a semi-finished product.
(3) Bonding: and respectively bonding the coated semi-finished products on two sides of the intermediate substrate, attaching one side of the intermediate substrate, which is not covered with the antistatic release film, to the surface of the intermediate substrate, and curing at 50 ℃ to obtain the double-sided adhesive tape.
Experiment of
The tapes prepared in examples and comparative examples were tested for peel force, tensile strength, and elongation at break, and the test results are shown in table 1;
the peel force of the tape was measured by reference to ASTM-D3330, and the tape was cut into pieces by leaving it to stand for 48 hours at 23 ℃/50 RH, the length and width of each piece was 15 cm. Times.2.5 cm, then the light release film was peeled off, PET of 23um thickness was applied, the other side was peeled off and stuck to a steel plate, the adherend was SUS304 steel plate, after sticking, it was pressed back 3 times with a 2kg rubber roller, left to stand for 20min, and peeled off at 180 ℃ at a speed of 300mm/min, and the peel strength was measured as peel force (gf/25 mm);
testing tensile strength and elongation at break by referring to ASTM-D3759, cutting the adhesive tape into samples, wherein the length and the width are respectively 80mm multiplied by 15mm, and the gauge length is 20mm;
the test results are shown in table 1:
Figure BDA0003850569440000101
from examples 1-3, it can be seen that, as the addition amount of the adhesive increases, the bonding force between the substrate and the surface adhesive becomes stronger, so that the tensile strength gradually increases, no delamination occurs between the substrate and the surface adhesive, and the influence of the addition of the adhesive on the peeling force of the surface adhesive is small; from example 4, it is clear that the tensile strength is increased and the influence of the peeling force is not large by changing the kind of the elastomer from the polyurethane elastomer to the styrene thermoplastic elastomer; from example 5, it can be seen that, by changing the type of the pressure-sensitive adhesive from acrylic pressure-sensitive adhesive to styrene pressure-sensitive adhesive, the influence of the tensile strength is small, but the change of the peeling force is obvious; from the embodiment 6, it can be known that the effect of no rebound of stretching can be realized by changing the type of polyolefin from polyethylene to polypropylene, and the effect of no delamination between the base material and the surface adhesive is slightly improved by changing the tensile strength into polypropylene, so that the peeling force is not greatly influenced.
As can be seen from comparative example 1, the excessive addition of the polyurethane thermoplastic elastomer for modification results in significant reduction of tensile strength, longer elongation, and larger rebound due to too large elasticity; as can be seen from comparative example 2, polyolefin has a high strength without modification by adding an elastomer, and the adhesive tape after bonding has a high strength but no elasticity; as can be seen from comparative example 3, if no adhesive is added, the bonding force between the substrate and the surface adhesive is weak, and obvious delamination phenomenon occurs during the peeling force test or the tensile test, thereby affecting the use.
And (4) conclusion: according to the invention, the elastomer modified polyolefin film is used as a middle base material, acrylic or styrene pressure-sensitive adhesives are attached to two sides of the middle base material, and the adhesive is added, so that the adhesiveness between the middle elastomer modified polyolefin film base material and the pressure-sensitive adhesives attached to two sides is improved; the double-sided adhesive tape disclosed by the invention can realize deformation of the stretched adhesive tape, but the double-sided adhesive tape does not rebound and has a certain elongation, the shape of the stretched adhesive tape cannot be recovered, and the double-sided adhesive tape can be quickly removed after being stretched, so that the double-sided adhesive tape is practical and attractive, and the user experience is improved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A double-sided adhesive tape which can be removed by stretching and does not bounce is characterized in that: the double-sided adhesive tape comprises a middle substrate, a pressure-sensitive adhesive and an antistatic release film; the double-sided adhesive tape takes the middle base material as a central film, and the pressure-sensitive adhesive and the anti-static release film are sequentially adhered to the two sides of the double-sided adhesive tape from inside to outside; the middle substrate is an elastomer modified polyolefin film.
2. A stretch removable and non-resilient double sided tape as defined in claim 1, wherein: the content of the elastomer in the intermediate base material is 5 to 20 percent by mass percent; the polyolefin is one or more of polyethylene, polypropylene, polybutylene and cycloolefin; the elastomer is one or more of thermoplastic elastomer, natural rubber, ethylene propylene rubber, styrene butadiene rubber and nitrile butadiene rubber.
3. A stretch removable and non-resilient double sided tape as defined in claim 2, wherein: the thermoplastic elastomer is one or more of polyurethane thermoplastic elastomer, styrene-butadiene-styrene, styrene-ethylene-styrene, styrene-butylene-styrene and styrene-isoprene-styrene.
4. A stretch removable and non-resilient double sided tape as defined in claim 1, wherein: the pressure-sensitive adhesive comprises main body glue and a solvent A, wherein the mass ratio of the main body glue to the solvent A is 1: 0.3-1;
the main glue comprises the following components: 45-83 parts of matrix resin or matrix rubber, 5-50 parts of tackifying resin, 1-5 parts of antioxidant and 0-7 parts of curing agent by weight.
5. A stretch removable and non-resilient double sided tape as defined in claim 4, wherein: the pressure-sensitive adhesive comprises an adhesive, wherein the dosage of the adhesive is 1-13wt% of the main body adhesive, and the adhesive is obtained by photocuring a matrix resin, a solvent B, a functional monomer and a photoinitiator.
6. A stretch removable and non-resilient double sided tape as defined in claim 5, wherein: the preparation steps of the adhesive are as follows: and mixing the matrix resin and the solvent B, stirring, adding the functional monomer and the photoinitiator after the functional monomer and the photoinitiator are completely dissolved, continuously stirring for 40-80min, and performing ultraviolet curing to obtain the adhesive.
7. A stretch removable and non-resilient double sided tape as defined in claim 5, wherein: the functional monomer accounts for 5-30wt% of the matrix resin, and is one or more of ethoxylated bisphenol A dimethacrylate, 2-phenylphenoxyethyl acrylate, dipentaerythritol hexaacrylate, beta-carboxypropyl acrylate, dipropylene glycol diacrylate, isobornyl acrylate, 1,6-hexanediol diacrylate and polyethylene glycol (200) diacrylate;
the dosage of the photoinitiator accounts for 2-15wt% of the matrix resin; the photoinitiator is any one or a mixture of more than two of 2,2-dimethoxy-phenylacetophenone, alpha' -ethoxyacetophenone, 2,4,6-trimethylbenzoyl ethyl phosphate and 2-hydroxy-2-methyl-1-phenyl-1-acetone, and the initiation wavelength is 240-460um; the photocuring wave band is UVA wave band curing, and the photocuring energy is 200-2000mJ/cm 2 ；
The solvent B is butyl acetate or/and ethyl acetate.
8. The stretch removable and non-resilient double-sided tape of claim 4, wherein the matrix resin is one or more of butyl acrylate, methyl methacrylate, butyl methacrylate, isooctyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxyethyl acrylate, hydroxypropyl acrylate;
the matrix rubber is one or more of natural rubber, styrene-butadiene rubber, nitrile rubber, ethylene-propylene rubber, styrene-butadiene-styrene (SBS), styrene-ethylene-styrene, styrene-butylene-styrene (SEBS) and styrene-isoprene-styrene (SIS);
the solvent A is any one of ethyl acetate or toluene.
9. The method for preparing a double-sided adhesive tape with stretch removal and no rebound according to any one of claims 1 to 8, wherein: the preparation method comprises the following specific steps:
(1) Preparing an intermediate substrate: feeding polyolefin and elastomer into a double-screw extruder, performing melt blending, extruding and granulating, casting, flattening and drying the extruded raw materials by a forming roller, and rolling to obtain an intermediate base material;
(2) Uniformly mixing matrix resin or matrix rubber, tackifying resin, an antioxidant, a curing agent, an adhesive and a solvent A, stirring, filtering, standing and discharging bubbles to obtain the pressure-sensitive adhesive glue; placing an antistatic release film on a scraper type coating machine, taking pressure-sensitive adhesive glue for coating, uniformly coating the pressure-sensitive adhesive on the antistatic release film, drying and rolling after coating is finished, and obtaining a semi-finished product;
(3) Bonding: and respectively bonding the coated semi-finished products on two sides of the intermediate substrate, attaching one side of the intermediate substrate, which is not covered with the antistatic release film, to the surface of the intermediate substrate, and curing at 45-50 ℃ to obtain the double-sided adhesive tape.
10. The method for preparing a stretch removable and non-elastic double-sided adhesive tape according to claim 9, wherein: in the step (1), the extrusion conditions are as follows: the machine speed of the main machine is 70r/min, the feeding speed is 15r/min, the temperature of each section is 150-200 ℃, and the rotating speed of the stock cutter is controlled at 130-260r/min;
in the step (1), the thickness of the film of the intermediate substrate is 50-400um.
CN202211133889.1A 2022-09-17 2022-09-17 Double-sided adhesive tape capable of being stretched and removed and not rebounded and preparation method thereof Pending CN115386308A (en)

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CN110691827A (en) * 2017-05-23 2020-01-14 株式会社寺冈制作所 Adhesive tape
CN111440553A (en) * 2020-04-15 2020-07-24 安徽屹珹新材料科技有限公司 Stretchable and removable foam double-sided adhesive tape and preparation method thereof
CN113480945A (en) * 2021-07-23 2021-10-08 江苏斯迪克新材料科技股份有限公司 Acrylate pressure-sensitive adhesive and preparation method thereof
CN113583620A (en) * 2021-08-12 2021-11-02 成都拓利科技股份有限公司 UV curing adhesive with excellent adhesive force and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130236724A1 (en) * 2012-03-07 2013-09-12 Nitto Denko Corporation Double-sided adhesive tape
CN110691827A (en) * 2017-05-23 2020-01-14 株式会社寺冈制作所 Adhesive tape
CN111440553A (en) * 2020-04-15 2020-07-24 安徽屹珹新材料科技有限公司 Stretchable and removable foam double-sided adhesive tape and preparation method thereof
CN113480945A (en) * 2021-07-23 2021-10-08 江苏斯迪克新材料科技股份有限公司 Acrylate pressure-sensitive adhesive and preparation method thereof
CN113583620A (en) * 2021-08-12 2021-11-02 成都拓利科技股份有限公司 UV curing adhesive with excellent adhesive force and preparation method thereof

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