CN102260462A - Method for making double-sided adhesive tape - Google Patents
Method for making double-sided adhesive tape Download PDFInfo
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- CN102260462A CN102260462A CN201110003343XA CN201110003343A CN102260462A CN 102260462 A CN102260462 A CN 102260462A CN 201110003343X A CN201110003343X A CN 201110003343XA CN 201110003343 A CN201110003343 A CN 201110003343A CN 102260462 A CN102260462 A CN 102260462A
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Abstract
The invention discloses a method for making a double-sided adhesive tape, which mainly comprises the following steps: 1, evaporating solvent in a solvent type pressure-sensitive adhesive in a closed environment to obtain solvent-free pressure-sensitive adhesive; 2, heating the solvent-free pressure-sensitive adhesive prepared by the step 1 till the solvent-free pressure-sensitive adhesive is molten, adding a curing agent, and uniformly mixing the solvent-free pressure-sensitive adhesive and the curing agent with a vibrating rod or screw extruder; 3, coating the mixture of the solvent-free pressure-sensitive adhesive prepared by the step 2 on one side of a substrate; 4, roasting the mixture of the solvent-free pressure-sensitive adhesive in the step 3; 5, adhering a release material on the surface of the roasted mixture of the solvent-free pressure-sensitive adhesive; 6, coating the mixture of the solvent-free pressure-sensitive adhesive obtained by the step 2 on the other side of the substrate; 7, roasting the mixture of the solvent-free pressure-sensitive adhesive in the step 6; and 8, coiling. In the invention, by adopting solvent-free coating, safety hazards in a coating process are eliminated, and the coating production efficiency is improved greatly.
Description
Technical field
The present invention relates to a kind of double sticky tape making method, belong to the adhesive material preparing technical field.
Background technology
Double faced adhesive tape is the widely used material of a class, and it is to be made by the two sides that pressure sensitive adhesive is coated in base material, and pressure sensitive adhesive wherein (pressure sensitive adhesive) is the abbreviation of pressure-sensitive adhesive, is a class has susceptibility to pressure tackiness agent.Pressure sensitive adhesive can be divided into rubber-type and resin type two classes according to the matrix resin composition, and rubber-type can be divided into natural rubber and synthetic rubber class again, and resin type mainly comprises polyacrylate(s), silicone based and polyurethanes again.According to the difference of dispersion medium, be divided into water-based and solvent-borne type pressure sensitive adhesive.Water-borne pressure sensitive adhesive is to react with the medium of water as reaction, promptly gets the pressure sensitive adhesive goods after the coating oven dry.Because water-borne pressure sensitive adhesive adopts water as solvent, so it is cheap, throughput rate is very fast, but its tackiness agent performance is not high.Solvent-borne type pressure sensitive adhesive toluene, organic solvents such as ethyl acetate react as the medium of reaction, and in solvent-borne type pressure sensitive adhesive finished product, organic solvent accounts for 60～75% of gross weight, and tackiness agent accounts for 25～40% of gross weight.
The technology maturation of solvent-borne type pressure sensitive adhesive has good pressure-sensitive and cohesiveness, again because advantages such as ageing resistance, photostabilization, water tolerance, oil-proofness, so almost not through the time change the problem that causes that pressure-sensitive descends, and peelable performance is good.At present, the solvent-borne type pressure sensitive adhesive is owing to environmental issue causes progressively dwindling of use range, its reason is: because the solvent-borne type pressure sensitive adhesive is in the process of coating, the a large amount of organic solvent evaporations that need wherein to contain fall, and therefore the problem that causes mainly contains: one, the long processing time of pressure sensitive adhesive goods; Two, Zheng Fa solvent causes actual bodily harm to the operator; Three, Zheng Fa solvent itself does not have sufficient utilization can cause waste yet; In heat-processed, substrates coated is damaged.
Summary of the invention
The object of the invention provides a kind of double sticky tape making method, and purpose is to solve the environmental issue that the solvent-borne type pressure sensitive adhesive exists in use.
For achieving the above object, the technical solution used in the present invention is: a kind of double sticky tape making method, mainly form by the following step:
The first step: in closed environment, the solvent-borne type pressure sensitive adhesive is heated to 60～200 ℃, the solvent that contains in the solvent-borne type pressure sensitive adhesive is evaporated fully obtain solvent-free pressure sensitive adhesive; Described solvent-borne type pressure sensitive adhesive is solvent type polyacrylate pressure sensitive adhesive or solvent-borne type rubber pressure sensitive adhesive;
Second step: the solvent-free pressure sensitive adhesive that the first step is obtained is heated to molten state, add solidifying agent then, and mix with vibrating head or screw extrusion press solvent-free pressure sensitive adhesive and the solidifying agent with molten state, make solvent-free pressure sensitive adhesive and solidifying agent carry out the prepolymerization reaction and obtain solvent-free pressure sensitive adhesive mixture; Wherein, the mass ratio of described solvent-free pressure sensitive adhesive and solidifying agent is 100:0.1～5; Described solidifying agent is isocyanates solidifying agent or metallic salt solidifying agent; Described metallic salt solidifying agent is selected from least a in zinc acetylacetonate, aluminium acetylacetonate, chromium acetylacetonate, ferric acetyl acetonade, methyl ethyl diketone cadmium, acetylacetone cobalt, acetylacetonate nickel, acetylacetone copper, methyl ethyl diketone zirconium, acetyl acetone and the manganese acetylacetonate;
The 3rd step: go on foot the side that the solvent-free pressure sensitive adhesive mixture that makes is coated on base material with second;
The 4th step: the solvent-free pressure sensitive adhesive mixture in the 3rd step is toasted;
The 5th step: in the 4th step through the surface applying separated type material of the solvent-free pressure sensitive adhesive mixture of overbaking;
The 6th step: go on foot the another side that the solvent-free pressure sensitive adhesive mixture that makes is coated on base material with second;
The 7th step: the solvent-free pressure sensitive adhesive mixture in the 6th step is toasted;
The 8th step: rolling.
Related content in the technique scheme is explained as follows:
1, in the such scheme, in the described the first step, reclaims after the solvent collection that evaporation obtains, the condensation and obtain liquid solvent.
2, in the such scheme, described isocyanates solidifying agent is selected from tolylene diisocyanate, ditan-4, at least a in 4 '-vulcabond, isophorone diisocyanate and the hexamethylene diisocyanate.
3, in the such scheme, described base material is plain weave woven fiber glass base material, polyvinyl chloride film, polyethylene terephthalate thin film, non-woven fabrics or cotton paper.
4, in the such scheme, the evaporation operation of carrying out solvent under closed environment is for fear of the solvent vapo(u)r contaminate environment, and makes the solvent of evaporation all to reclaim.
5, in the such scheme, solvent-borne type rubber pressure sensitive adhesive is meant with natural or synthetic rubber and is main raw material and adds low-molecular-weight thickening material, softening agent and stablizer etc. and be dissolved in organic solvent and be made.
6, in the such scheme, during owing to interpolation solidifying agent in the solvent-free pressure sensitive adhesive of molten state, contain organic solvent in the solidifying agent, therefore need remove.
Because the technique scheme utilization, the present invention compared with prior art has following advantage and effect:
1, solvent-borne type pressure sensitive adhesive of the present invention is made carrier with solvent such as toluene, ethyl acetate when synthetic, so the character of pressure sensitive adhesive is good.
2, the present invention all removes the solvent after the pressure sensitive adhesive polymerization (toluene, ethyl acetate) in closed environment and all reclaims, and its rate of recovery is up to more than 99.9%, thereby the whole cost of reduction tackiness agent is avoided environmental pollution.
3, the organic solvent that toluene, ethyl acetate equal solvent type pressure sensitive adhesive are commonly used has features such as poisonous, inflammable, in the roasting adhesive process when the solvent-borne type pressure sensitive adhesive directly is coated with, when heating makes the organic solvent volatilization, cause operative employee's actual bodily harm at first easily, next has explosion hazard, and the coating process potential safety hazard can be effectively avoided in the solvent-free coating of the present invention, and can improve coating production efficiency greatly by saving the roasting required time of glue.
4, because the solvent-free pressure sensitive adhesive viscosity of molten state is very big, the present invention can be easily mixes the solvent-free pressure sensitive adhesive and the solidifying agent of molten state with vibrating head, and makes both carry out prepolymerization under heated condition to react.
5, the present invention utilizes shearing, the mixing effect of screw extrusion press that the solvent-free pressure sensitive adhesive and the solidifying agent of molten state are mixed, and carries out the prepolymerization reaction, and the mixture after extruding can directly be coated with.
6, because the polyacrylate polymers that the present invention uses is a saturated compound, so heat, photochemistry, oxygenolysis are had good tolerability, good stability.
Embodiment
Below in conjunction with embodiment the present invention is further described:
Embodiment one: a kind of double sticky tape making method, mainly form by the following step:
The first step: at first make solvent-borne type rubber pressure sensitive adhesive, the prescription of solvent-borne type rubber pressure sensitive adhesive is:
| Raw material | Mass parts |
| Natural rubber (one-level smoke sheet rubber) | 75 |
| Styrene-butadiene rubber(SBR) (SBR-1502) | 20 |
| α-terpine resin | 80 |
| 2402 resol | 18 |
| The LDJ-240 chloroprene rubber | 4 |
| MgO | 2 |
| ZnO | 4 |
| Anti-aging agent RD | 2 |
| Accelerator DM | 0.1 |
| 120# gasoline | 600 milliliters |
| Ethyl acetate | 600 milliliters |
The preparation technology of solvent-borne type rubber pressure sensitive adhesive: plasticate natural and styrene-butadiene rubber(SBR) (1) on rubber mixing machine, add anti-aging agent, tackifier, vulcanizing agent etc. then successively and carry out mixing.(2) film that mixes being placed temperature is that 130～145 ℃ loft drier vulcanized 10～15 minutes.(3) rubber that vulcanized is cut into small pieces.(4) use dissolution with solvents, and add 2402 resol through pre-reaction.(5) add the solvent of aequum again, stirring is solvent-borne type rubber pressure sensitive adhesive.
Second step: in closed environment, solvent-borne type rubber pressure sensitive adhesive is heated to 60～90 ℃ (adopting the method that progressively heats up), the solvent that contains in the solvent-borne type pressure sensitive adhesive is evaporated fully obtain solvent-free rubber pressure sensitive adhesive.Reclaim after gasoline that evaporation obtains and ethyl acetate collection, the condensation.
The 3rd step: the solvent-free rubber pressure sensitive adhesive that second step was obtained is heated to molten state, add the different zinc acetylacetonate of solidifying agent then, and mix with the solvent-free pressure sensitive adhesive and the solidifying agent of vibrating head with molten state, make solvent-free pressure sensitive adhesive and solidifying agent carry out the prepolymerization reaction; Wherein, the mass ratio of described solvent-free pressure sensitive adhesive and solidifying agent is 100:2.
The 4th step: go on foot the side that the solvent-free pressure sensitive adhesive mixture that makes is coated on the PVC base material, 0.05 millimeter of bondline thickness with second.
The 5th step: the solvent-free pressure sensitive adhesive mixture in the 3rd step is toasted.
The 6th step: in the 4th step through the surface applying separate-type paper of the solvent-free pressure sensitive adhesive mixture of overbaking.
The 7th step: go on foot the another side that the solvent-free pressure sensitive adhesive mixture that makes is coated on the PVC base material, 0.05 millimeter of bondline thickness with second.
The 8th step: the solvent-free pressure sensitive adhesive mixture in the 6th step is toasted.
The 9th step: rolling.
Embodiment two: a kind of double sticky tape making method, mainly form by the following step:
The first step: at first make the solvent type polyacrylate pressure sensitive adhesive, its raw material is: butyl acrylate (BA), methyl methacrylate (MMA), vinylformic acid (AA), vinyl acetate (VAc), Hydroxyethyl acrylate, ethyl acetate, Diisopropyl azodicarboxylate, chain-transfer agent Dodecyl Mercaptan.Polymerization technique is: in the 500ml four-hole boiling flask of electric mixer, reflux exchanger, thermometer and dropping funnel is housed, drop into all monomers and solvent, feed N when being warming up to 70 ℃
2When temperature rises to 80 ℃, drip initiator Diisopropyl azodicarboxylate solution in batches, insulation reaction 6 hours is cooled to 50 ℃ and promptly gets the solvent type polyacrylate pressure sensitive adhesive.
Second step: in closed environment, with the solvent type polyacrylate pressure sensitive adhesive, be heated to 70～100 ℃ (adopting the method that progressively heats up), the solvent (ethyl acetate) that contains in the solvent type polyacrylate pressure sensitive adhesive evaporated fully obtain solvent-free polyacrylate pressure-sensitive.Reclaim after the ethyl acetate collection that evaporation obtains, the condensation and obtain the liquid acetic acid ethyl ester.
The 3rd step: the solvent-free polyacrylate pressure-sensitive that second step was obtained is heated to molten state, add the metallic salt solidifying agent then, and mix with the solvent-free pressure sensitive adhesive and the solidifying agent of screw extrusion press with molten state, make solvent-free pressure sensitive adhesive and solidifying agent carry out the prepolymerization reaction; Wherein, the mass ratio of described solvent-free pressure sensitive adhesive and solidifying agent is 100:1; Described solidifying agent is tolylene diisocyanate (Toluene-2,4-diisocyanate, a 4-vulcabond); Described metallic salt solidifying agent is zinc acetylacetonate and the ferric acetyl acetonade mixture according to mass ratio 1:1.
The 4th step: go on foot the side that the solvent-free pressure sensitive adhesive mixture that makes is coated on the PET base material, 0.05 millimeter of bondline thickness with second.
The 5th step: the solvent-free pressure sensitive adhesive mixture in the 3rd step is toasted.
The 6th step: in the 4th step through the surface applying separate-type paper of the solvent-free pressure sensitive adhesive mixture of overbaking.
The 7th step: go on foot the another side that the solvent-free pressure sensitive adhesive mixture that makes is coated on the PET base material, 0.05 millimeter of bondline thickness with second.
The 8th step: the solvent-free pressure sensitive adhesive mixture in the 6th step is toasted.
The 9th step: rolling.
Embodiment three: a kind of double sticky tape making method, mainly form by the following step:
The first step: at first make the solvent type polyacrylate pressure sensitive adhesive, its raw material is: butyl acrylate (BA), vinyl-acetic ester, ethyl acrylate, Hydroxyethyl acrylate, vinylformic acid, toluene, ethyl acetate.Polymerization technique is: monomers such as butyl acrylate, toluene, ethyl acetate input are equipped with in the four-hole boiling flask of reflux condensing tube, thermometer, airway and agitator, drip the initiator isopropyl benzene hydroperoxide when reaching reflux temperature, time is two hours, continue reaction three hours, and then drip the initiator isopropyl benzene hydroperoxide, continue reaction and got the water white transparency thick liquid in about two hours.
Second step: in closed environment,, be heated to 70～110 ℃ (adopting the method that progressively heats up), the solvent (a toluene ethyl acetate) that contains in the solvent-borne type pressure sensitive adhesive evaporated fully obtain solvent-free pressure sensitive adhesive with the solvent type polyacrylate pressure sensitive adhesive.Evaporation obtains that toluene and ethyl acetate are collected, reclaim after the condensation and obtain liquid toluene, ethyl acetate.
The 3rd step: the solvent-free polyacrylate pressure-sensitive that second step was obtained is heated to molten state, add curing agent toluene vulcabond (Toluene-2,4-diisocyanate then, the 4-vulcabond), and mix with the solvent-free polyacrylate pressure-sensitive and the tolylene diisocyanate of vibrating head with molten state, make solvent-free polyacrylate pressure-sensitive and tolylene diisocyanate carry out the prepolymerization reaction; Wherein, the mass ratio of described solvent-free pressure sensitive adhesive and solidifying agent is 100:0.8.
The 4th step: go on foot the side that the solvent-free pressure sensitive adhesive mixture that makes is coated on plain weave woven fiber glass base material, 0.05 millimeter of bondline thickness with second.
The 5th step: the solvent-free pressure sensitive adhesive mixture in the 3rd step is toasted.
The 6th step: in the 4th step through the surface applying plastics release film of the solvent-free pressure sensitive adhesive mixture of overbaking.
The 7th step: go on foot the another side that the solvent-free pressure sensitive adhesive mixture that makes is coated on plain weave woven fiber glass base material, 0.05 millimeter of bondline thickness with second.
The 8th step: the solvent-free pressure sensitive adhesive mixture in the 6th step is toasted.
The 9th step: rolling.
Embodiment four: a kind of double sticky tape making method, mainly form by the following step:
The first step: at first make the solvent type polyacrylate pressure sensitive adhesive, its raw material is: butyl acrylate (BA), vinyl-acetic ester, vinylformic acid, benzoyl peroxide (BPO), ethyl acetate, Isooctyl acrylate monomer.Polymerization technique is: add proper amount of solvent in the four-hole boiling flask that adjustable rotating speed electric mixer, reflux exchanger, thermometer, dropping funnel are housed, start stirring, after being warming up to reflux temperature, add the solution that partly is dissolved with monomer and initiator B PO, under reflux temperature, keep about two hours of reaction, drip residual monomer, initiator and solvent.After waiting to dropwise, 80 ℃ of following insulation reaction three hours, cooling obtained the water white transparency glue solution of sticky shape gradually, is the solvent-borne type polypropene pressure sensitive adhesive.
Second step: in closed environment,, be heated to 60～120 ℃ (adopting the method that progressively heats up), the solvent (ethyl acetate) that contains in the solvent-borne type pressure sensitive adhesive evaporated fully obtain solvent-free pressure sensitive adhesive with the solvent type polyacrylate pressure sensitive adhesive.Recovery obtained liquid toluene after evaporation obtained ethyl acetate collection, condensation.
The 3rd step: the solvent-free polyacrylate pressure-sensitive that second step was obtained is heated to molten state, add the solidifying agent aluminium acetylacetonate then, and mix with the solvent-free polyacrylate pressure-sensitive and the solidifying agent aluminium acetylacetonate of screw extrusion press with molten state, make solvent-free polyacrylate pressure-sensitive and solidifying agent aluminium acetylacetonate carry out the prepolymerization reaction; Wherein, the mass ratio of described solvent-free pressure sensitive adhesive and solidifying agent aluminium acetylacetonate is 100:4.
The 4th step: the solvent-free pressure sensitive adhesive mixture that will make is coated on a side of plain weave woven fiber glass base material, 0.05 millimeter of bondline thickness.
The 5th step: the solvent-free pressure sensitive adhesive mixture in the 3rd step is toasted.
The 6th step: in the 4th step through the surface applying separate-type paper of the solvent-free pressure sensitive adhesive mixture of overbaking.
The 7th step: go on foot the another side that the solvent-free pressure sensitive adhesive mixture that makes is coated on the PET base material, 0.05 millimeter of bondline thickness with second.
The 8th step: the solvent-free pressure sensitive adhesive mixture in the 6th step is toasted.
The 9th step: rolling.
Embodiment five: a kind of double sticky tape making method, mainly form by the following step:
The first step: at first make the solvent type polyacrylate pressure sensitive adhesive, its raw material is: butyl acrylate (BA), ethyl acrylate, ethyl propenoate, vinylformic acid, benzoyl peroxide (BPO), ethyl acetate.Polymerization technique is: in the 250ml four-hole boiling flask that adjustable rotating speed electric mixer, reflux exchanger, thermometer, dropping funnel are housed, drop into ethyl acetate then, be warming up to the reflux temperature of ethyl acetate, add general mixed monomer (being dissolved with initiator), start agitator, begin reaction.React after one and a half hours, drip remaining general monomer, drip off in one hour.Add a small amount of initiator after dripping off again.Remain on reflux temperature reaction two hours, get light yellow viscous liquid, be incubated half an hour, be cooled to 50 ℃, reaction finishes.
Second step: in closed environment,, be heated to 80～130 ℃ (adopting the method that progressively heats up), the solvent (ethyl acetate) that contains in the solvent-borne type pressure sensitive adhesive evaporated fully obtain solvent-free pressure sensitive adhesive with the solvent type polyacrylate pressure sensitive adhesive.Recovery obtained the liquid acetic acid ethyl ester after evaporation obtained ethyl acetate collection, condensation.
The 3rd step: the solvent-free polyacrylate pressure-sensitive that second step was obtained is heated to molten state, add the solidifying agent hexamethylene diisocyanate then, and mix with the solvent-free pressure sensitive adhesive and the solidifying agent hexamethylene diisocyanate of vibrating head with molten state, make solvent-free polyacrylate pressure-sensitive and solidifying agent hexamethylene diisocyanate carry out the prepolymerization reaction; Wherein, the mass ratio of described solvent-free polyacrylate pressure-sensitive and solidifying agent hexamethylene diisocyanate is 100:3.5.
The 4th step: the solvent-free pressure sensitive adhesive mixture that will make is coated on a side of non-woven fabrics base material, 0.05 millimeter of bondline thickness.
The 5th step: the solvent-free pressure sensitive adhesive mixture in the 3rd step is toasted.
The 6th step: in the 4th step through the surface applying separate-type paper of the solvent-free pressure sensitive adhesive mixture of overbaking.
The 7th step: go on foot the another side that the solvent-free pressure sensitive adhesive mixture that makes is coated on non-woven fabrics base material, 0.05 millimeter of bondline thickness with second.
The 8th step: the solvent-free pressure sensitive adhesive mixture in the 6th step is toasted.
The 9th step: rolling.
Embodiment six: a kind of double sticky tape making method, mainly form by the following step:
The first step: at first make solvent-borne type rubber pressure sensitive adhesive, its raw material is: natural rubber (NR), third styrene-butadiene rubber(SBR) (SBR), chloroprene rubber (CR), methyl methacrylate, butyl acrylate, toluene, benzoyl peroxide (BPO), terpine resin, petroleum resin.Polymerization technique is: respectively after plasticating in the mill, mixing more even back discharging is placed and is used for glue after 1～2 day with various rubber.In the 2L four-necked bottle with an amount of toluene with the rubber unvulcanizate rising temperature for dissolving that is cut into small pieces.Constant temperature drips the mix monomer that is dissolved with initiator at 80 ℃ with constant pressure funnel branch both sides to treat to dissolve also by rubber unvulcanizate fully, twice dropping about 1 hour at interval.Should keep a close eye on gelatin viscosity after dripping for the second time and change, during to appropriate viscosity, cooling, discharging.Get above-mentioned Graft Adhesive, add a certain amount of toluene dissolved terpine resin, petroleum resin used and stir and get final product.
Second step: in closed environment,, be heated to 60～150 ℃ (adopting the method that progressively heats up), the solvent (toluene) that contains in the solvent-borne type rubber pressure sensitive adhesive evaporated fully obtain solvent-free rubber pressure sensitive adhesive with solvent-borne type rubber pressure sensitive adhesive.Recovery obtained liquid toluene after evaporation obtained toluene collection, condensation.
The 3rd step: the solvent-free rubber pressure sensitive adhesive that second step was obtained is heated to molten state, add the solidifying agent isophorone diisocyanate then, and mix with the solvent-free rubber pressure sensitive adhesive and the solidifying agent isophorone diisocyanate of screw extrusion press with molten state, make solvent-free rubber pressure sensitive adhesive and solidifying agent isophorone diisocyanate carry out the prepolymerization reaction; Wherein, the mass ratio of described solvent-free pressure sensitive adhesive and solidifying agent is 100:5.
The 4th step: the solvent-free pressure sensitive adhesive mixture that will make is coated on a side of cotton paper base material, 0.05 millimeter of bondline thickness.
The 5th step: the solvent-free pressure sensitive adhesive mixture in the 3rd step is toasted.
The 6th step: in the 4th step through the surface applying separate-type paper of the solvent-free pressure sensitive adhesive mixture of overbaking.
The 7th step: go on foot the another side that the solvent-free pressure sensitive adhesive mixture that makes is coated on the cotton paper base material, 0.05 millimeter of bondline thickness with second.
The 8th step: the solvent-free pressure sensitive adhesive mixture in the 6th step is toasted.
The 9th step: rolling.
Embodiment seven: a kind of double sticky tape making method, mainly form by the following step:
At first make the solvent type polyacrylate pressure sensitive adhesive, its raw material is: butyl acrylate (BA), ethyl acrylate, ethyl propenoate, methyl methacrylate, Hydroxyethyl acrylate, vinylformic acid, Dicyclopentadiene (DCPD) maleic acid ester, Diacetylmonoxime, modified rosin, dimethylbenzene, vinyl acetic monomer, benzoyl peroxide (BPO).Polymerization technique is: add mixed solvent and partially mixed monomer in the 1L four-necked bottle of stirring, backflow and Dropping feeder is housed.Be warming up to 80 ℃, add part initiator benzoyl peroxide solution, begin to carry out polyreaction, drip remaining mix monomer and initiator solution then.After monomer dropping finishes, be warming up to 90 ℃ and be incubated 1 hour.Be cooled to room temperature, add modified rosin solution, auxiliary agents such as flow agent stir and promptly get the solvent type polyacrylate pressure sensitive adhesive.
Second step: in closed environment, with the solvent type polyacrylate pressure sensitive adhesive, be heated to 60～100 ℃ (adopting the method that progressively heats up), the solvent (dimethylbenzene) that contains in the solvent type polyacrylate pressure sensitive adhesive evaporated fully obtain solvent-free polyacrylate pressure-sensitive.Recovery obtained liquid paraxylene after evaporation obtained dimethylbenzene collection, condensation.
The 3rd step: the solvent-free polyacrylate pressure-sensitive that the first step is obtained is heated to molten state, add the solidifying agent zinc acetylacetonate then, and mix with the solvent-free polyacrylate pressure-sensitive and the solidifying agent zinc acetylacetonate of screw extrusion press with molten state, make solvent-free polyacrylate pressure-sensitive and solidifying agent zinc acetylacetonate carry out the prepolymerization reaction; Wherein, the mass ratio of described solvent-free pressure sensitive adhesive and solidifying agent is 100:2.
The 4th step: go on foot the side that the solvent-free pressure sensitive adhesive mixture that makes is coated on the PVC base material, 0.05 millimeter of bondline thickness with second.
The 5th step: the solvent-free pressure sensitive adhesive mixture in the 3rd step is toasted.
The 6th step: in the 4th step through the surface applying separate-type paper of the solvent-free pressure sensitive adhesive mixture of overbaking.
The 7th step: go on foot the another side that the solvent-free pressure sensitive adhesive mixture that makes is coated on the PVC base material, 0.05 millimeter of bondline thickness with second.
The 8th step: the solvent-free pressure sensitive adhesive mixture in the 6th step is toasted.
The 9th step: rolling.
The foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (5)
1. double sticky tape making method is characterized in that: mainly be made up of the following step:
The first step: in closed environment, the solvent-borne type pressure sensitive adhesive is heated to 60～200 ℃, the solvent that contains in the solvent-borne type pressure sensitive adhesive is evaporated fully obtain solvent-free pressure sensitive adhesive; Described solvent-borne type pressure sensitive adhesive is solvent type polyacrylate pressure sensitive adhesive or solvent-borne type rubber pressure sensitive adhesive;
Second step: the solvent-free pressure sensitive adhesive that the first step is obtained is heated to molten state, add solidifying agent then, and mix with vibrating head or screw extrusion press solvent-free pressure sensitive adhesive and the solidifying agent with molten state, make solvent-free pressure sensitive adhesive and solidifying agent carry out the prepolymerization reaction and obtain solvent-free pressure sensitive adhesive mixture; Wherein, the mass ratio of described solvent-free pressure sensitive adhesive and solidifying agent is 100:0.1～5; Described solidifying agent is isocyanates solidifying agent or metallic salt solidifying agent; Described metallic salt solidifying agent is selected from least a in zinc acetylacetonate, aluminium acetylacetonate, chromium acetylacetonate, ferric acetyl acetonade, methyl ethyl diketone cadmium, acetylacetone cobalt, acetylacetonate nickel, acetylacetone copper, methyl ethyl diketone zirconium, acetyl acetone and the manganese acetylacetonate;
The 3rd step: go on foot the side that the solvent-free pressure sensitive adhesive mixture that makes is coated on base material with second;
The 4th step: the solvent-free pressure sensitive adhesive mixture in the 3rd step is toasted;
The 5th step: in the 4th step through the surface applying separated type material of the solvent-free pressure sensitive adhesive mixture of overbaking;
The 6th step: go on foot the another side that the solvent-free pressure sensitive adhesive mixture that makes is coated on base material with second;
The 7th step: the solvent-free pressure sensitive adhesive mixture in the 6th step is toasted;
The 8th step: rolling.
2. double sticky tape making method according to claim 1 is characterized in that: in the described the first step, reclaim after the solvent collection that evaporation obtains, the condensation and obtain liquid solvent.
3. double sticky tape making method according to claim 1, it is characterized in that: described isocyanates solidifying agent is selected from tolylene diisocyanate, ditan-4, at least a in 4 '-vulcabond, isophorone diisocyanate and the hexamethylene diisocyanate.
4. double sticky tape making method according to claim 1 is characterized in that: described base material is plain weave woven fiber glass base material, polyvinyl chloride film, polyethylene terephthalate thin film, non-woven fabrics or cotton paper.
5. double sticky tape making method according to claim 1 is characterized in that: described separated type material is separate-type paper or plastics release film.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106634724A (en) * | 2016-12-30 | 2017-05-10 | 佛山市顺德区啟德薄膜材料实业有限公司 | Acrylate solvent-free pressure-sensitive adhesive and preparation method thereof |
| CN111295429A (en) * | 2017-10-31 | 2020-06-16 | 株式会社寺冈制作所 | Adhesive tape |
| CN112497763A (en) * | 2020-03-31 | 2021-03-16 | 南京汇鑫光电材料有限公司 | Thick glue multilayer laminating process |
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| CN106634724A (en) * | 2016-12-30 | 2017-05-10 | 佛山市顺德区啟德薄膜材料实业有限公司 | Acrylate solvent-free pressure-sensitive adhesive and preparation method thereof |
| CN111295429A (en) * | 2017-10-31 | 2020-06-16 | 株式会社寺冈制作所 | Adhesive tape |
| CN111295429B (en) * | 2017-10-31 | 2022-06-14 | 株式会社寺冈制作所 | Adhesive tape |
| CN112497763A (en) * | 2020-03-31 | 2021-03-16 | 南京汇鑫光电材料有限公司 | Thick glue multilayer laminating process |
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