TW201037053A - Double face adhesive tape - Google Patents

Abstract

A double face adhesive tape, which is an adhesive tape that has adhesive agent layers on two faces of a foaming substrate. The interlayer strength of the foregoing foaming substrate is above 12N/cm. 25 percent compression strength is 30 to 170kPa. The foregoing adhesive agent layers are formed by acrylic based adhesive agent composition. The foregoing acrylic based adhesive agent composition contains: an acrylic based copolymer containing (methyl) acrylate having 4 to 12 carbon atoms and vinyl monomer having carboxyl as the monomer ingredients, and polymerized rosin ester based adhesiveness-providing resin. According to the double face adhesive tape, the excellent fitness, the reworking suitability, and re-peeling ability between the double face adhesive tape and the adhered body can be accomplished even if rigid bodies are laminated with each other, and furthermore immersion of water may be effectively avoided.

Description

201037053 VI. Description of the invention: [Technical field to which the invention pertains] A double-sided adhesive tape with a foam base material as a center core [Prior Art]

In a portable electronic device such as an electronic notebook, a mobile phone, a PHS, a camera, a music player, a television, etc., the bonding of the protective panel and the housing of the information display unit is represented by the use of double in the fixing of various components and modules. Adhesive tape. In order to ensure the superiority of the competition in the market, and to pursue a variety of functions, among them, the pursuit of water resistance. As a fixing (four) belt for a member for an electronic machine, the following technique has been disclosed: for example, a maximum value of loss tangent " buckle 5" in a temperature range of -40 to -5 Torr, and a surface sticking to a specific adherend a double-sided adhesive sheet having adhesive layers having a strength of i9N/above provided on both sides of the support (refer to Patent Document 1). The double-sided adhesive sheet has a good adhesive force by having a specific adhesive layer. It has excellent impact resistance such that the member is not easily peeled off due to an impact when the object is dropped. However, for example, the adhesion of the protective panel and the casing, and the adhesion of the casing and the casing are in the rigid bodies. In the case of the double-sided adhesive sheet, it is difficult to obtain complete adhesion on the joint surface with the adherend, and water may be immersed when there are minute voids. For the surface-adhesive tape, the following double-sided adhesive tape has been disclosed, which has a foam as a base material and has a temperature at which the maximum value of the loss tangent "grab" is -251 or less, and the holding test at 〇 ° C Keep in For 24 hours or more between the acrylic adhesive layer (refer to Patent Document 32010370532). In the double-sided adhesive tape, when the members are bonded to each other, the shackles and the shackles are excellent, and even if only the components are properly joined, the foam is used as the base mn. ~ It is difficult for them to suppress the microscopic flaws at the interface between the member and the adhesive layer. ^ Even if a part of the interface is filled with water or a floating space, it is difficult to smash silver. It is difficult to achieve water repellency because of the expansion of water from the cockroaches. County & 丨β + -r·... On the way, #特别〗 In the pursuit of the narrow frame of the portable electronic machine, the requirements of the narrow frame, the advancement of the step, the pursuit It is difficult to give sufficient waterproofness under the barrier of the thickness of the rubber sheet of the m(10). = In the case of a portable electronic device, etc., in order to improve the structure at the time of manufacture (4), the double-sided adhesive tape which is unsuccessfully bonded to the unfinished product, and the component are separately peeled (reprocessed), and sometimes the defective product is used for the finished product. Repairing, raw, and reusing, the shell and the member are put into the rod and the knives are separated and decomposed and disintegrated, but the teeth and the foam substrate are replaced by a pair of fish. In this case, since the foam substrate is prone to interlayer damage, it is easy to remain on the surface of the member, and the removal is difficult, thereby reducing the reattachment of the new double-sided adhesive tape after removing the double-sided adhesive tape from the casing and the member. The efficiency of the job 'shell, component, product yield, and recovery rate. However, in the conventional foam substrate, although the softness (compressive strength) at the time of compression in the thickness direction is pursued, there is no concept of strength (interlayer strength) in the case of stretching in the thickness direction. Further, when the adhesive strength of the adhesive is lowered individually, the adhesion to the adherend is also lowered, so that it is difficult to impart sufficient water repellency. [Problem to be Solved by the Invention] The problem to be solved by the present invention is to provide a sticky body of a adherend. Good adhesion and followability, double: adhesive tape 'excellent and re-peelability.再 and re-processing one k) suitability in addition to the above-mentioned topics, Luo Dan # straight and right-handed, as for a double-sided adhesive tape, ❹ _ Adhesive tape. Further ‘ _ ^ ^ ～ λ λ, in addition to the above-mentioned subject, is quite suitable for a double-sided adhesive tape.

It has excellent resistance to "Wm iU" and is suitable for waterproof double-sided adhesive tapes for portable electronic applications. The inventors of the present invention conducted intensive studies and found that by using a foam substrate having a specific flexibility and strength as a substrate, the adhesion of the composition of the composition is matched. Even when the rigid bodies are bonded to each other, the adhesion between the double-sided adhesive tape and the adherend, the reworkability and the re-peelability can be achieved, and the water can be effectively prevented from collapsing. Thus, the above problems are solved. That is, the present invention provides a double-sided adhesive tape which is a double-sided adhesive tape having an adhesive layer on both sides of a foam base material, wherein the foam base material has an interlayer strength of 12 N/cm or more, 25 The % compressive strength is 30 to 170 kPa. The adhesive layer is composed of an acrylic pressure-sensitive adhesive composition containing an acrylic copolymer and a rosin ester-based adhesion-imparting resin. The acrylic copolymer contains 5 201037053 = (meth)acrylic acid having an atomic number of 4 to 12 and an ethyl bake monomer having a slow group as a monomer component. Advantageous Effects of Invention The double-sided adhesive tape of the present invention is less likely to cause interlayer damage of the foam base material. Further, even in the case where interlayer cracks occur, the adhesive agent may remain on the surface of the member and be easily peeled off due to & In the case of manufacturing a portable electronic device, etc., when a double-sided adhesive tape member or the like that has not been successfully bonded to an unfinished product is peeled off (reprocessed), and in order to be finished for a portable electronic device or the like When the shell or the member is separated, disassembled, or disassembled by repair, regeneration, and reuse, it is possible to improve the force of removing the double-sided adhesive (4) from the casing and the member and then reattaching the new surface-bonded t-belt. Efficiency shell, component, product yield and recovery. Advance, the double-sided adhesive tape of the present invention exhibits a suitable adhesiveness with the adherend', which can effectively prevent the intrusion of water from the adhesion gap, and has an excellent resistance to the ruler. Therefore, for thinning, the casing is improved. The internal volume limitation is strict, and it is also effective for providing a waterproof function for a portable electronic device or the like which is difficult to provide a water sealing means. [Embodiment] The present invention relates to a double-sided adhesive tape having a double-sided adhesive tape having adhesive layers on both sides of a foam substrate, wherein the foam substrate has an interlayer strength of 12 N/cm. The above 25% compressive strength is 3 〇 to 1 70 kPa, and the adhesive layer is composed of an acrylic pressure-sensitive adhesive composition, and the acrylic adhesive composition contains an acrylic copolymer and a polymerized rosin ester-based adhesion-imparting resin. The acrylic copolymer contains a (meth) acrylate having a carbon number of 6 201037053 of 4 to 12 and a vinyl monomer having a carboxyl group as a soap component. [Foam substrate] The foam substrate used in the present invention is a foam substrate having an interlayer strength of 12 N/cm or more, preferably 15 to 40 N/cm, more preferably 18 to 35 N/cm. By using a foam having an interlayer strength within this range, the peeling property of the double-sided adhesive tape can be imparted even when an interlayer crack of the substrate occurs in the flexible foam substrate. Here, in terms of the interlayer strength, first, each of the two adhesive layers having a thickness of 5 Å/zm is bonded to both sides of the foam to which the interlayer strength is to be evaluated, and then 4 (TC is cured for 48 hours). A double-sided adhesive tape for measuring the strength of the interlayer is produced. Next, in a 23: (: 50% RH environment, a 2 kg roller is used, and the steel sheet is not recorded (the surface is made of #360 water-resistant abrasive paper) On the one side of the hairline treatment, the adhesive surface of one side is lined with a 2 cm wide and 10 cm long (flow direction of the polyolefin-based foam) of a polyester film having a thickness of 25 # m. The adhesive tape sample was subjected to one back and forth pressure attachment, and placed at 4 48 for 48 hours. After standing at 23 ° C for 24 hours, it was measured to stretch at 300 mm/min in an environment of 23 ° C · 50% RH. Velocity, strength when the foam is torn in the direction of 90 degrees. The foam substrate used in the present invention is a foam substrate having a 25% compression strength of 3 Torr to 170 kPa, preferably 40 to 150 kPa. By using a 25% foam strength base material in this range, it has excellent adhesion to the adherend', especially for having The adherend of the convex shape and the rough surface is also suitably followed to have excellent adhesion. In addition, as for the hair/envelope substrate of the compressive strength 7 201037053, since it has moderate cushioning properties, when attached The pressure is concentrated on the joint portion, so that it is easy to extrude the air existing in the bonding interface, so that excellent adhesion of the gap in which water does not enter can be achieved in terms of joining the rigid bodies. In terms of % compressive strength, the sample cut into 50 mm square is laminated to a thickness of about 1 Gmm. The sample is compressed by a plate having a larger area than the sample, and the sample is compressed at a speed of 10 mm/min at 23 t. About 2.5 mm (25% of the original thickness), and then stopped, and measured the strength after 2 () seconds. The tensile elastic modulus of the inclusion substrate was 200 N for the foam substrate used in the present invention. /em2 or more. The tensile strength per unit width is i〇n /cm or more, preferably 12 5 N/cm or more, more preferably more. The elongation of the knife is not particularly limited, but $(10)~1 〇 〇〇%, preferably 300 to 700%, by using tensile modulus, tensile strength, In the foam base material having the elongation at break in this range, even in the case of the foamed soft base material, the deterioration of the workability of the double-sided adhesive tape and the breakage can be suppressed, and the workability of the attachment can be lowered. When the double-sided adhesive tape is peeled off, it is difficult to cause interlayer damage of the foam. Even in the case where interlayer cracks are generated, the peeling property of the double-sided adhesive tape can be imparted. Thus, the aforementioned tensile elastic modulus, The tensile strength per unit width is: 吏yensil〇n tensile testing machine, under the condition of 23t · 5 followed by h, under the condition of =Γ3°〇_~, the length of the marking line is m, and 1 cni The strength of the sample obtained by the measurement of the sample. The foamed structure of the foam base material used in the present invention is preferably 201037053: (4) The structure is effective because it can effectively prevent water from the cut surface of the foam substrate. The shape of the bubble forming the closed cell structure is not as specific as that of the thickness direction of the foam, and the average direction of the flow direction, the width direction, or both directions is straight:: a long shape Since the independent bubble "has a moderate cushioning property, the expansion ratio of the foam substrate is not particularly limited, and the interlayer strength, the compressive strength, and the like are adjusted to the above-described range, and the adherend is excellent. The aspect of the compatibility and the ease of peeling is ~12 times, preferably 2 to 8 times, more preferably 2 4 to 5 times. . . . The average cell diameter in the thickness direction of the substrate is preferably a heart, although it depends on the thickness of the foam, preferably 5 to (4) = 10 to 100 " m. The average bubble diameter in the flow direction of the foam substrate is preferably... . One or two, the best is 1. 〇~·m. By making the average bubble diameter as follows: even in the case where the width of the double-sided adhesive tape becomes narrow, it is easy to block the standing bubble" to appropriately block the average bubble diameter of the water immersion from the cross section of the foam substrate. Although the ratio is not particularly limited, the ratio of the average bubble diameter in the two moving directions to the bubble diameter = the average bubble diameter (the average bubble diameter in the flow direction) is preferably J 2 to 15, and is more complicated. In the width direction of the bubble base material, the ratio of the thick sound side "average A to the average bubble diameter of the foam base material (average in the width direction: average bubble diameter in the dry direction) is preferably 1 > 2~ 15, more preferably 2 to 9 201037053 11. In addition, the optimum flow is when the ratio is 1.2 or more, and the ° ^ direction is the above ratio range. Therefore, the followability is improved. Sexuality, when the flow direction of the foam substrate is less than 15 彳, it is not easy to cause uniformity. The softness or tensile strength of the X direction is not ^^, ', and the average bubble diameter ratio is compared; Current direction and width When it is the above ratio range: 'Better than the width of the 〇·33~3 direction and the width direction of the soft side of the foamed base material of the flow side foam substrate of the wide gentleman's scoop phenomenon. The flow direction is cut to 1 cm. Then, in the direction of the visibility, the cut surface of the cut foam substrate is two:: the microscope (_) will be in the width direction of the foam substrate or after 0 times' The cut surface of the cross-section bubble substrate of the JA maneuvering direction is on the substrate ',, " in the photo towel. On the obtained basis, the flow direction or the direction of the wide household is measured by the valley. The actual length before the enlargement is 2mm ^ Width into the # 认 . 办 & & & & 切断 切断 切断 切断 切断 切断 切断 申 申 王 王 王 王 王 王 王 王 王 王 王 = = = = = = = = = = = = = = = = = = The average bubble diameter is measured by the method. First, the thickness of the foam base material by the SEM emulsion is measured. The contact is performed under the same conditions as the average bubble diameter measurement in the flow direction of the foam substrate. SEM photographing. Next, in the obtained photograph, the foam was counted by visual inspection. The number of bubbles in the thickness direction existing in any part of the material is calculated by the following formula. The average bubble diameter in the thickness direction is calculated by the following formula: 10 201037053 Average bubble diameter U m in the thickness direction = thickness of the foam substrate (// The number of m)/bubbles is measured in any three places, and the average value is taken as the average bubble diameter in the thickness direction.

The interlayer strength, compressive strength, tensile modulus and the like of the foam base material can be suitably adjusted by the raw material of the substrate to be used and the foam structure. The type of the foam base material to be used in the present invention is not particularly limited as long as it is a foam base material having the above-mentioned interlayer strength, compressive strength, tensile modulus, and the like, and polyethylene, polypropylene, and the like can be used. a polyolefin-based foam composed of an ethylene-propylene copolymer, an ethylene-vinyl acetate copolymer, a polyurethane foam, an oak-based foam composed of an acrylic rubber or another elastomer, and the like. [The foam base material having a thin closed cell structure excellent in adherence to irregularities on the surface of the adherend, buffer absorption, and the like is easily produced. Therefore, a polyolefin-based foam can be preferably used. The thickness of the foam base material may be appropriately adjusted according to the (four) state, and may be 5 (^20 (^m. in the case of fixing the member of the electronic device = lower), particularly in a small, thin type. In the case of portable electronic devices: due to the pursuit of a thin tape thickness, the thickness of the substrate is preferably $5〇~_m, more preferably 70~400"m., called π丨, the crosslinked olefin smoke系 月 旨 : : : 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃 烃The ray is applied to it: it is obtained by 'bubbling, stretching, and flaking'. The resin: a resin can be used, and a conventionally known poly-smoke-based resin can be used, but it is preferably a heart 11 201037053 40% by mass or more. A polyolefin-based resin of a polyethylene-based resin obtained by using a quinone-based compound containing a tetravalent transition metal, and also by foaming the foam after the foam is foamed After being sliced in the direction of doubling, 'expanding and crusting with a hot roll, and manufacturing. In the foam base In the above, if necessary, any of the following additives may be added to the resin: a plasticizer, a softener, an antioxidant, a flame retardant, a fiber made of glass or plastic, a hollow ball (ball), a bead, a metal powder, etc. Fillers, colorants such as pigments and dyes, leveling agents, tackifiers, water repellents, defoamers, etc. In order to improve the adhesion to the adhesive layer or other layers, the foam substrate is used. It can also be subjected to surface treatment such as corona treatment, flame treatment, plasma treatment, hot air treatment, ozone/ultraviolet treatment, and application of an easy-adhesion treatment agent. In terms of surface treatment, by wetting agent-based wetting The index is 36 mN/m or more, preferably 4 〇mN//m or more, and more preferably 48 mN/m or more, and good adhesion to the adhesive can be obtained. [Adhesive layer] constituting the double-sided layer of the present invention Adhesive composition of an adhesive layer of an adhesive tape = characterized by 'cured by an acrylic adhesive composition containing an acrylic copolymer and a polymerized rosin-based adhesive-imparting resin' acrylic acid The copolymer contains a (meth)propionic acid 6 having a carbon number of 4 to 12 and a vinyl monomer having a repellent group as a monomer component. As a (meth)propyl group having a mosquito atom number of 4 to 12 Examples of the acid esters include: 'methyl (meth)acrylate, ethyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, t-butyl (meth)acrylate , (a) octyl acrylate, isooctyl (meth) acrylate, isophthalic acid (meth) acrylate 12 201037053 ester, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate One or two or more kinds of the monomers may be used. Among them, a (meth) acrylate having an alkyl group having 4 to 8 carbon atoms, particularly n-butyl acrylate, is easy to ensure adhesion to the adherend. It is preferable because it has excellent adhesion and cohesiveness and resistance to sebum. The content of the n-butyl acrylate is preferably 60% by mass or more, and more preferably 90% by mass or more, based on the total of (meth) acrylate having 4 to 12 carbon atoms. The content of the (meth) acrylate in the acrylic copolymer is preferably from 8 to 985 mass%, more preferably from 90 to 98. mass%, based on the monomer component of the acrylic copolymer. As the vinyl monomer having a carboxyl group, acrylic acid, methacrylic acid, itaconic acid, maleic acid, (meth)acrylic acid dimer, crotonic acid, ethylene oxide-modified succinic acid vinegar, and the like can be used. Among them, acrylic acid is preferably used as a copolymerization component. The content of the vinyl monomer having a carboxyl group in the acrylic copolymer is preferably from 5% to 1% by mass, more preferably from 1.5 to 5.0% by mass, based on 5% of the monomer component constituting the acrylic copolymer. Further, in the acrylic copolymer used in the adhesive composition constituting the adhesive layer of the double-sided adhesive tape of the present invention, a vinyl monomer having a tertiary amine skeleton in the molecule is preferably used as a monomer; The reason is that it is excellent in cohesive force and can suppress an excessive increase in adhesion. Therefore, polystyrene, (iv), acrylic, polycarbonate, polyacrylamide, polyacrylic acid, which are materials such as a casing and a member of an electronic device. Resin, such as resin, poly-resin, resin, and other metals such as residual steel, ingot, or zinc-plated steel, and glass, etc., can achieve good adhesion, reworkability, and re-peelability. 201037053 As a vinyl monomer having a tertiary amine skeleton in the molecule, N vinylpyrrolidone, N-vinyl caprolactam, acryloylmorpholine, n,n dimethyl decylamine, or the like can be used, among which It is preferred to use N-vinylpyrrolidone as a copolymerization component. The content of the vinyl monomer having a tertiary amine skeleton in the molecule in the acrylic copolymer is preferably from 5% to 5.0% by mass in the monomer component constituting the acrylic copolymer, more preferably from 15 to 3% by mass. Further, in the case where an isocyanate-based crosslinking agent is used as the crosslinking agent of the acrylic copolymer used in the present invention, as the vinyl monomer having a functional group reactive therewith, it is preferred to use a hydroxyl group-containing vinyl group. monomer. As the vinyl group-containing monomer having a mercapto group, for example, (mercapto)acrylic acid 24-based ethyl s, (meth)acrylic acid 2 _ propyl propyl vinegar, (meth) propylene sulphate L-butyl s-day (methyl) acrylic acid 6 • hexyl vinegar, etc., containing trans-based (meth) acrylate vinegar, especially preferably (meth) acrylate 2-meryl , (Meth)acrylic acid 4, butyl vinegar. The content of the radical-containing = dilute precursor which is reacted with the isocyanate-based crosslinking agent is preferably a monomer of the acid-based copolymer, particularly preferably 0.03 to 〇·3 mass%. . Examples of the vinyl monomer of 7 include: acetic acid B, 2, propylene, chiral amine, 2-mercaptopropanoic acid, etc., so-called t-yin's basal body; carbon number is 1~ 3 (meth) acrylate, the number of carbon atoms is based on (tetra) acid isobornyl, and stupid is two: (methyl (tetra) acid brewing, (a other of the other series of two:: vinyl single thought. i 5~2 0 in the monomer component is further composed of an acrylic acid copolymer, preferably 2 to 8 mass J, more preferably 1·5 to 1 "*%' adhesive The cohesive force ' Paula / can be easily adjusted, the force, and the adhesiveness are adjusted to a suitable range by being included in the range. 14 201037053 The acrylic copolymer can be known by a solution polymerization method such as a float polymerization method or an emulsion polymerization method. The polymerization method is used to: Γ 付 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , 黏 黏 黏 黏 , 黏 黏 , , , , , , , a thermal initiation method of a thermal polymerization initiator such as a peroxide-based nitrile such as a peroxide-based nitrile; (4) = _糸, benzoin, shouting, and poor technology #加Even acyl ketal, acyl phosphine oxide-based, benzoin

Infrared ray, a method of initiating ultraviolet irradiation of a photopolymerization initiator, and an electron beam irradiation method. With respect to the molecular weight of the above acrylic copolymer, the weight average molecular weight in terms of polystyrene measured by a gel permeation chromatograph (G P C) is from 40 to 1.6 million', preferably from 60 to 1.2 million. In the acrylic pressure-sensitive adhesive composition used in the present invention, in order to achieve compatibility with the adherend, reworkability, and removability, it is preferred to use a polymerized rosin ester-based adhesion-imparting resin. The polymerized rosin ester-based adhesion-imparting resin has a softening point of from 1 to 18 (rc, preferably 12 Å to 1600 tt.) Polymerized rosin-based vinegar-based adhesion-imparting resin with respect to 100 parts by mass of the acrylic copolymer The amount of the compound is from 1 to 40 parts by mass, preferably from 1 to 3 parts by weight. Further, one or two types of the polymerized rosin ester-based adhesion-imparting resin may be used. Further, the acrylic acid used in the present invention In the adhesive composition, one or more kinds of adhesion-imparting resins other than the polymerized rosin ester-based adhesion-providing resin can be used for the purpose of adhesion to the adherend and the reworkability and re-peelability of the D-week. As other adhesion-imparting resins, exemplified are: rosin, polymerized rosin, rosin phenol, stabilized rosin ester, disproportionated rosin 15 201037053 vinegar, hydrogenated rosin vinegar, box rare, ene (four), stone In the case of acetaminophen-based resin, etc., in the case of θ system or in the case of an alloy, an emulsion-type adhesion-imparting resin is used. "Where it is preferable to disproportionate rosin ester-based adhesion-imparting resin, loose-bonding: imparting a resin, hydrogenated rosin vinegar-based adhesive to an ester-based resin, particularly preferably a disproportionation-imparting resin having a softening point of 60 to 130 tons. In the case where the adhesive is used in the case of using another adhesive-imparting resin, it is preferably an acryl-based copolymer 1 〇〇 5 5 ... ... ... ... ... ... ... 酯 酯 酯 酯 酯 酯 酯 酯 酯 酯 酯 酯 酯 酯 酯 酯 酯 酯 酯 酯 酯 酯 酯 酯 酯 酯The total amount of the 100 parts by mass of the adhesion-imparting resin is 10 〜 銮 访 访 阁 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 For the force, it is preferred to crosslink the adhesive. The aggregation of the agent layer is as follows: isocyanic acid, oxygen, 'column coating, parent compounding agent, metal chelate crosslinking agent' nitrogen a C-crosslinking agent or the like. Among them, a crosslinking agent of a type which is preferably added after the polymerization is added to carry out a crosslinking reaction; preferably is rich in reactivity with a (meth) group or an acrylic copolymer. Isocyanate I crosslinking agent and epoxy crosslinking agent; from improvement and foaming In view of the adhesion of the substrate, a more isocyanate-based crosslinking agent is used. The term "isophthalic acid vinegar-based crosslinking agent" may be exemplified by toluene diisomeric acid vinegar and Cai get-1,5-isocyanuric acid.酉,六亚甲芙-υ备放amp & 八亚γ丞-isocyanate, di-peptidyl methane diiso, acid vinegar, xylene diisocyanate vinegar, trimethylolpropane modified toluene diisocyanate A vinegar or the like is particularly preferably a trifunctional polyisocyanate-based compound. Examples of the 3 g-enable isocyanate-based compound include methyl acetoise diisocyanate 16 201037053 and their diterpene-based fluorene. The addition product, the tribasic sulfonium isocyanate g, etc. As an index of the degree of crosslinking, the value of the gel fraction of the insoluble portion after the adhesive layer was immersed in toluene for 24 hours was used. The gel fraction is preferably from 25 to 70% by mass, more preferably from 30 to 60% by mass, most preferably from 33 to 55% by mass, and if it is in this range, both cohesiveness and adhesion are good. The gel fraction was measured based on the following. On the release sheet, the adhesive composition was applied to a thickness of 65 # m after drying, at 1 〇 (r c Drying ❹ 5 minutes, aging at 40 ° C for 2 days, cutting into 50 mm square, and using this as a sample. Next, the weight (G1) before toluene impregnation of the above sample was measured in advance, and a metal mesh of 3 mesh was used. (2: The toluene-insoluble portion of the sample after being immersed in the toluene solution for 24 hours was filtered, and separated, and the weight (G2) of the residue after drying for 1 hour at 11 Torr was measured, and the following formula was used. The gel fraction is determined. Gel fraction (% by mass) = (G2/Gl) xl 〇〇 As an additive, if necessary, it can be arbitrarily added to the adhesive composition, a plasticizer, a softener, and an antioxidant. Qi!, glass, plastic fiber, two "Μ ball beads, metal powder and other fillers, colorants such as pigments and dyes, leveling agents, 'tackifiers', water repellents, defoamers, and other known additives. "As for the adhesive layer of the double-sided adhesive tape of the present invention, the temperature at which the maximum value of the tangent (u" is not deduced at the frequency m: is preferably 3 〇 c 1 〇 c. In particular, when it is desired to improve the drop impact resistance in a low-temperature environment, it is more preferably -3 (TC~(TC, preferably _25t~_5t:. Further, in the double-sided adhesive tape of the present invention, The frequency of 1HZ is not lossy tangent (the temperature of the maximum value of ta... is preferably thief ~ 2 (rc, more 17 201037053 good for tree ~ (four), best for training ~ rc. In addition, loss at frequency IHZ Tangent (tan<n has a maximum value of 1 〇 or less, preferably 〇 以下 or less.) The maximum value of the loss tangent of the double-sided adhesive tape and the maximum value of the tangent by the temperature at which the display loss of the adhesive layer is tangent. When the temperature is within this range, it is easy to impart good adhesion to the object at the present temperature and fall impact resistance in a low-temperature environment of 〇c or less. The double-sided adhesive tape used in the present invention is used. The storage trajectory of the adhesive layer at a frequency of 1 Η z, the wide, and the elastic number (G), as long as the above-mentioned loss tangent (four) ") range is not specified, but when the modulus (four) is 2. When WPa or more is preferably 3 or more, it is easy to impart resistance in the following cases. The electronic device with high visibility (airtightness) and airtightness increases the internal pressure due to the increase in the temperature of the machine. The water pressure of the water depth lm (the force of (M 1 MPa) or more is applied from the press-peeling direction to The case where the double-sided adhesive tape is fixed. -When the sample is W (plus 5) 'From the dynamic dispersion measurement based on temperature dispersion: the stored elastic modulus (G,), loss elastic modulus (G) ,,), the root eight, the formula is obtained. According to the temperature-dispersion dynamic viscoelastic test... obtain the loss tangent at a certain frequency to show the maximum temperature. The large value and the dilute acid system ^ ' can The types and the types of the monomers used in the preparation of the binders and the materials used in the preparation of the adhesives are selected, and the type and amount of the monomers to be used are: According to the specific L, the dynamic viscoelastic properties of the above-mentioned adhesive layer are defined by the loss tangent of the dynamic viscoelastic spectrum at the root temperature, the characteristic temperature, 18 201037053 or the loss tangent and the storage elastic modulus. Step-by-step, dynamic viscoelasticity at a specific frequency The characteristic spectrum of the loss spectrum is the maximum value of the tangential value of the temperature, or the maximum value of the loss tangent. In the measurement of dynamic viscoelasticity, the viscoelasticity tester (trade name, manufactured by Rheometric Co., Ltd.) is used.

AreUKSTD), the test piece was sandwiched between the parallel circles of the measuring machine as the measuring unit, and the frequency was measured at a frequency of 1 Hz from the _ thief to the 丨 (four) (four) 弹 _ number (G') and the loss elastic modulus (〇 test In the case of the sheet, the adhesive layer or the double-sided adhesive tape is formed to have a thickness of about 2 mm and sandwiched between the parallel discs for measurement. ^ As far as the thickness of the adhesive layer used in the present invention is concerned, from the thinner In the case of the tape, it is also easy to ensure adhesion to the adherend, reworkability, and re-peelability, and the thickness of one side is preferably Μ100/zm, more preferably 30 to 80 "m .

The release sheet used in the present invention is not particularly limited, and examples thereof include a synthetic resin film such as polyethylene, polypropylene, or a polyester film, paper, a non-woven ten-foamed sheet or a metal case, and a laminate thereof. On at least one side of the base material, a release sheet having an organic stone treatment, a long-chain base treatment, a treatment, and the like for improving the peeling property from the adhesive is performed. And a single sheet of the polyester film, which is preferably a release sheet which has been subjected to an organic stone peeling treatment on a paper or a sheet in which polyethylene is laminated. [Double-sided adhesive tape] The double-sided adhesive tape of the present invention and the adhesive layer exhibit interlayer damage to the adhered foam substrate, in other words, by using the above-mentioned foam base for proper adhesion Sexuality, it is not easy to send out. Even in the case where the interlayer crack 19 201037053 is produced, μ仏 is left on the surface of the member to be easily peeled off, so that it is unsuccessfully bonded to the manufacture of a portable electronic device or the like. When 70% of the double-sided adhesive tape, members, and the like are peeled off (reworked), and the portable electronic device or the like is completed. The port is repaired or regenerated, and the spears are used. When the casing and the member are separated, and the disassembled and disassembled, the double-sided adhesive tape is removed from the carcass and the member, and the new double-sided adhesive tape is reattached. Efficiency, yield of components, etc. and recovery. In the step of fixing the member of the electronic device having the waterproof function, it is possible to effectively prevent the water from being immersed from the close gap and has an excellent waterproof function. The basic structure of the embodiment of the double-sided adhesive tape of the present invention is as follows: The hair/package substrate is a core core. A structure in which an adhesive layer is provided on both surfaces of the substrate. The substrate and the adhesive layer may be directly laminated or may have other layers. These forms may be appropriately selected depending on the intended use, and when the tape is further provided with dimensional stability and tensile strength, a layer (four) such as a polyester film may be provided; and when the tape is provided with light blocking properties, light shielding may be provided. Layer; when ensuring light reflectivity, a light reflecting layer may be provided. In the case where these other layers are provided, a water-repellent layer is used as the other layer. membrane. α^, 曰 曰 layer 彳 各种 各种 彳 彳 彳 彳 彳 各种 各种 各种 各种 各种 各种 各种 α α α α α α α α α α α α α α α α α α α α α α α α α α α α 3~12#m. As the light-shielding layer, it is possible to easily use a light-receiving layer of a coloring agent such as yttrium, yttrium, or the like, and a layer formed of a black ink, which is preferably used as a light-shielding property. As the reflective layer ', a layer made of white oil can be used simply. As the thickness of these layers, it is preferable to hold the horse 2 to 2 inches in m, of which 6 hearts. When the thickness is within this range, the curl of the substrate caused by the shrinkage of the ink is not easily generated. The workability of the tape is good. The double-sided adhesive tape of the present invention can be produced according to a conventionally known method. : exemplified by, for example, 'directly on the foam substrate, or on the surface of other layers laminated on the foam substrate, the enamel acrylic adhesive group: direct printing of the coating and drying Or a transfer method in which a propylene and ruthenium adhesive composition is applied and dried on a release sheet, and then bonded to a surface of a foam substrate and a layer thereof. Preferred"' propylene θ on the release sheet

After the G-acid adhesive composition is applied and dried, the transfer method is applied to the surface of the foam substrate and other layers. The thickness of the double-sided adhesive tape of the present invention can be suitably adjusted according to the use of (4) P can be 70 to 14 〇〇 " m. In the case of fixing the components of the electronic device, particularly in the case of a small and thin portable electronic device, since a thin tape thickness is required, it is preferably 1 〇〇 to 6 〇〇, which is particularly preferable. 12〇" m~500 "m. By making the thickness of the tape to this thickness, it is also suitable for a thin and small portable electronic machine H, and in addition, good waterproof work can be achieved on the double-sided adhesive of the present invention. The surface bonding strength measured by the following measurement conditions is preferably (10) N/W or more, more preferably ΐ3 〇Ν / 4 cm 2 or more. The measurement conditions of the surface bonding strength 1 are as follows. °C, two double-sided adhesive tapes of 5 mm in length and 4 cm in length were attached in parallel on a 5 cm square acrylic plate having a thickness of 2 mm.) Then, an acrylic plate with a double-sided adhesive tape made of 1) was attached. In the center of the center of the acrylic plate, the center of the ABS plate is attached to: the thickness of the hole with the diameter lem at the center is 2mm, the length of 10xl5em is 21 201037053 / the flat π ABS plate, with 2kg After the roller was subjected to i pressurization, it was placed at 23 ° C for 1 hour as a test. 3) From the ABS side of the test piece, the acrylic plate was pressed at 10 〇/min by a tensile tester equipped with a stainless steel probe having a diameter of 8 mm by the hole of the abs plate, and the peeled acrylic plate was measured. Strength of.

Further, in the double-sided adhesive tape of the present invention, the surface adhesive strength 2 measured according to the measurement conditions described below is preferably 250 mJ or more, more preferably 350 mJ or more. The measurement conditions of the above-mentioned surface bonding strength 2 are as follows. 1) After cutting the double-sided adhesive tape into 2 cm square, it was attached to an acrylic plate having a thickness of 2 mm and 2 cm square. 2) The acrylic plate with the double-sided adhesive tape is attached to the center of the acrylic plate in the same manner as the center of the polyimide plate, and is attached to a 4 cm square having a thickness of 2 mm in a hole having a diameter of 1 cm at the center. The polyimide plate (with the addition of the vinegar/6 glass fiber) was subjected to i-back pressure with a 2 kg roller, and then placed at 23 t for 24 hours to serve as a test piece. 3) The test piece was placed on a stainless steel pedestal having a height of 3 cm and a thickness of 4 cm square, and the polyamine side was turned upward. 4) With the polyacetamide side hole facing the acrylic plate, the brass cone having a diameter of 5 mm and a length of 1 cm and having a length of 1 cm from the height l〇cm is continuously dropped at intervals of 10 cm (each I stage 3 times), measurement: The height at which the tape was peeled off or damaged was confirmed in the test piece. 5) Calculated based on the measurement results: drop energy mJ (=98x height (10)) x 100g) 〇 For the double-sided adhesive tape of the present invention, even if the thickness of the tape is thin, 22 201037053 does not show good adhesion to the adherend. Adhesiveness and re-peelability. Therefore, it is unsuccessfully joined to the double-sided adhesive tape, member, etc. which is not peeled off (1) for the good sheep at the time of manufacture, such as a South electronic machine, for the sake of improvement and rework. In the case of the case, in order to repair or use the finished product, the housing and the components are separated, decomposed, and disassembled, and the efficiency of the cooperation is ritual, and the ritual σ & Shape yield and recovery. As a specific Ο Π used for: in the electronic notebook, mobile phone, PHS, eye-catching machine, music player, TV and other electronic devices, the protective panel and the housing, the shell of the two poor display display digital keys, Touch panel and other input devices::: This sheet of 107 sticks, σ of the body and decorative sheets, /, his various components, the fixing of the module, and so on. Further, in the double-sided adhesive tape of the present invention, even a thin tape thickness exhibits an appropriate adhesion to the adherend, and it is possible to effectively prevent water from entering from the d gap and have an excellent waterproof function. Therefore, the waterproof function can be effectively imparted for the improvement of the thinning type, the strict volume limitation in the casing, and the difficulty in providing a separate water seal: the portable electronic case of the segment. As a specific use form, it can be suitably used in the case of a portable electronic device such as an electronic notebook, a mobile phone PHS, a camera, a music player, a television, etc., the protective panel of the information display part is attached to the casing, and the casing The second one is a combination of a housing, a sheet-like numeric key, a touch panel and the like, an attachment of a shouting body and a decorative sheet, and fixing of various other members and modules. In addition, the part 'which is a conventional water-sealing means such as a rubber seal, a ring, or a sealant can effectively separate the casing and the member while dissolving the waterproof function. Disintegration to repair, regenerate and reuse the finished product of 2010 201037053. EXAMPLES (Preparation of Adhesive Solution A) 93.54 parts by mass of butyl acrylate, 3 parts by mass of vinyl acetate, and 2.2 mass of acrylic acid in a reaction vessel equipped with a stirrer, a reflux condenser, a thermometer, a dropping funnel, and a nitrogen introduction crucible Parts, N-vinyl 2_D 1 2 parts by mass of cropirone, 0.06 parts by mass of 4-hydroxybutyl acrylate, 2,2'-azobisisobutyronitrile 〇_1 parts by mass as a polymerization initiator, dissolved In a solvent composed of 1 part by mass of ethyl acetate, it was polymerized at 601 for 12 hours to obtain an acrylic copolymer having a weight average molecular weight of 700,000 (in terms of polystyrene). Then, 15 parts by mass of PENSELD 135 (fine pentaerythritol of polymerized rosin, softening point 135 ° C) manufactured by Arakawa Chemical Co., Ltd., and SUPEr ESTER Al(R) manufactured by Arakawa Chemical Co., Ltd. (disproportionated rosin) were added to 1 part by mass of the acrylic copolymer. Glyceryl ester, softening point 100 ° c) 12 parts by mass, added with ethyl acetate 'evenly mixed' to obtain an adhesive solution A having a nonvolatile content of 40%. (Preparation of Adhesive Solution B) In a reaction vessel equipped with a scrambler, a reflux condenser, a thermometer, a dropping funnel, and a nitrogen introduction port, 74.9 parts by mass of butyl acrylate and 2-ethylhexyl acrylate 20 were used. Parts by mass, 2 parts by mass of acrylic acid, 3 parts by mass of ethyl acetate, 0. 1 part by mass of 4-hydroxybutyl acrylate, 2,2'-azobisisobutyronitrile, 1 part by mass as a polymerization initiator It was dissolved in a solvent composed of 1 part by mass of ethyl acetate to be polymerized at 70 C for 12 hours to obtain an acrylic copolymer having a weight average molecular weight of 500,000 (in terms of polystyrene). Then, 25 parts by mass of PENSEL D135 manufactured by Arakawa Chemical Co., Ltd., 24, 2010, 530, and the like, and ethyl acetate was added thereto and uniformly mixed to obtain an adhesive solution B having a nonvolatile content of 5% by weight. [Example 1] (Modulation of double-sided adhesive tape)

To the 100 parts by mass of the above-mentioned adhesive solution A, "C〇ronate L-45" (isocyanate g-based cross-linking agent, solid content 45%) manufactured by a sputum polyurethane company of 1.24 mass was added, and after stirring for 15 minutes, The film was applied to a pet film having a thickness of 75 # m which was subjected to a release treatment, and the thickness after drying was 35 #m, and dried at 80 C for 3 minutes to form an adhesive layer. Next, in a white polyolefin-based foam (thickness: 13 〇 #m, expansion ratio 2.5 times 25% compressive strength, 130 kPa, tensile elastic modulus: 丨14〇n / cm2' tensile strength 14.8 N/cm On both sides of the surface having a surface having a wetting index of 52 mN/m, after laminating each of the above-mentioned adhesive sheets, lamination was carried out using a roller having a linear pressure of 5 kg/cm. Thereafter, at 4 〇. The crucible 48 is thereby obtained as a double-sided adhesive sheet having a thickness of 200 #m. [Examples 2 to 5] In addition to the use of the table. "The battle cell substrate was used instead of the white poly-smoke foam, the thickness of the adhesive after drying was changed", and the text was as shown in Table 1. In addition, by the same method as in Example 1, the double-sided adhesive tape was obtained. [Example 6], and 0.8 mass (isocyanate-based cross-linking was added to remove the adhesion relative to the same method). The solution A 1 was prepared by the Japanese Polyurethane Co., Ltd. as a 'coronate l_45, a solid component (45%), and a double-sided adhesive tape was produced by the same procedure as in the example. [Examples 7 and 8] 25 201037053 Relative to the above adhesive solution (4). By mass, add 2 () f parts: 曰本聚胺醋公司 t "C〇r〇nate "5" (isocyanate vine cross-linking Μ 'solid content 45%) After 15 minutes of mixing, the film was applied to a PET film having a thickness of 75 Å which had been subjected to the release treatment, and the thickness after drying was the thickness shown in Table <>>, and dried at 80T for 3 minutes to form an adhesive layer. In addition to the use of the adhesive layer, the double-sided adhesive tape was obtained by the same method as in Example 。. Further [Example 9] Instead of the white polyolefin-based foam, the black ethylene-vinyl acetate-based foam (thickness: 800 # m, expansion ratio 8 times, 25% compression strength: 34 kPa) tensile strength : 24 8 N / cm, the surface of the surface was corona treated with a wetting index of 52 mN / m), compared with the adhesive solution B 1 〇〇 by mass, 2.0 parts by mass of the Japanese polyurethane company "c〇r〇nate" L_45, (isocyanate-based crosslinking agent, solid content: 45%), and after stirring for 15 minutes, it was applied on a pet film having a thickness of 75 #m which was subjected to a peeling treatment, and the thickness after drying was 50 #m, at 8 ( Rc was dried for 3 minutes to form an adhesive layer. A double-sided adhesive tape was obtained by the same method as in Example 8 except that the adhesive layer was used. [Example 10] (Preparation of Adhesive Solution F) In a reaction vessel of a stirrer, a reflux condenser, a thermometer, a dropping funnel, and a gas inlet port, 85.9 parts by mass of butyl acrylate, 4 parts by mass of acrylic acid, 10 parts by mass of methyl methacrylate, and 4-hydroxybutyl acrylate were used. 0.1 parts by mass, 2, 2 as a polymerization initiator _Azobisisobutyronitrile quality damage solution in a solvent consisting of 1 〇〇 parts by mass of ethyl acetate, at 26 201037053 6 (TC polymerization for 12 hours, thereby obtaining a weight average molecular weight of 7 million (to Polystyrene) In addition, 10 parts by mass of penseldi 6 〇 (pentaerythritol vinegar of polymerized rosin) and 97 parts by mass of cyclohexyl methacrylate were added to 100 parts by mass of the acrylic acid copolymer. Acrylic resin composed of 3 parts by mass of acrylic acid (weight average molecular weight: 6000, glass transition temperature: 66. 〇1 〇 parts by mass, added with ethyl acetate, uniformly mixed, thereby obtaining a non-volatile content of 30% of the adhesive solution F (Preparation of double-sided adhesive tape) 日本·9 parts by mass of Japan Polyurethane Co., Ltd. “C〇ronate L_45” (isocyanate-based crosslinking agent, solid content: 45%) was added to 100 parts by mass of the above-mentioned adhesive solution F. After 15 minutes of soaking, the film was coated on a PET film having a thickness of 75 μm which was subjected to the release treatment, and dried to a thickness of 80 ° C for 3 minutes to form an adhesive layer. A double-sided adhesive tape was obtained by the same method as in Example 1 except for the layer. [Example 11] (Preparation of Adhesive Solution G) t A mixer, a reflux condenser, a thermometer, a dropping funnel, and a nitrogen gas were provided. In the reaction vessel of the inlet, 71.9 parts by mass of butyl acrylate, 2 parts by mass of 2-ethylhexyl acrylate, 5 parts by mass of acrylic acid, 3 parts by mass of methyl acrylate, and 2-hydroxyethyl acrylate. 2,2'-azobisisobutyronitrile as a polymerization initiator (M f parts, dissolved in a solvent composed of ethyl acetate (10) parts by mass (TC polymerization for 12 hours, thereby obtaining a weight average molecular weight of 600,000 (in terms of polystyrene) acrylic copolymer. Then, the amount of the PENSEL D135 (pentaerythritol vinegar of the polymerized rosin) manufactured by Arakawa Chemical Co., Ltd. was added in an amount of 27 parts by weight, and the amount of iodine (10) parts by weight of yasUHARA CHEMICAL Co., Ltd. was added to the acetic acid-based compound. B is brewed, evenly tailed, so as to obtain a non-volatile content of 4S% of the adhesive solution G. (Preparation of double-sided adhesive tape) 曰 聚 聚 聚 Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor Cor After 'mixing for 15 minutes', the film was coated on the film having a thickness of ~m which was subjected to the peeling treatment, and the thickness after drying was made into a core, and dried at 80 C for 3 minutes to form an adhesive layer. Except for this, a double-sided adhesive tape was obtained by the same method as in Example 1. [Comparative Examples 1 and 2] A double-sided adhesive tape was obtained by the same method as in Example 除了 except that the foam base material described in Table 2 was used instead of the white polydextrose foam. [Comparative Example 3] A non-woven fabric (weight per unit area: 17 g/m 2 , tensile strength and IWNAm) was used for the A white poly (four) foaming crucible, except that the dried adhesive having a thickness of 70 / zm was used. A double-sided adhesive sheet was obtained by the same method as in Example i. [Comparative Example 4] A film made of polyethylene terephthalate (PET) was used (thickness: (10), tensile strength: 210 N/cm, and the surface was subjected to corona treatment with a wetting index of 52 mN/m). A double-sided adhesive sheet was obtained by substituting the same method as the one described in the table, in place of the white poly-smoke-type foam, and the thickness after the drying. 28 201037053 [Comparative Example 5] (Preparation of Adhesive Solution C) • In a reaction vessel equipped with a stirrer, a reflux condenser, a thermometer, a dropping funnel, and a nitrogen inlet, butyl acrylate 93.; 54 parts by mass, acetic acid 3 parts by mass of vinyl ester, 2.2 parts by mass of acrylic acid, 1.2 parts by mass of N-vinyl piroxone, 6 parts by mass of 4-hydroxybutyl acrylate, 6 parts by mass, 2,2'-azo two as a polymerization initiator 0.1 parts by mass of isobutyronitrile was dissolved in a solvent composed of 100 parts by mass of ethyl acetate, and polymerized at 60 ° C for 12 hours to obtain a weight average molecular weight of 700,000 (in terms of polystyrene) of acrylic acid. Is a copolymer. Next, 25 parts by mass of Arakawa Chemical SUPER ESTER A 100 was added as an adhesion-imparting resin to 100 parts by mass of the acrylic copolymer, and ethyl acetate was added thereto to uniformly mix to obtain an adhesive solution C having a nonvolatile content of 40%. . (Preparation of double-sided adhesive tape) "Coronate L-45" (isocyanate-based cross-linking agent, solid content 45%) of Japan Polyurethane Co., Ltd. was added in an amount of 1 part by mass to 1 part by mass of the above-mentioned adhesive solution C 1 part by mass. After stirring for 15 minutes, the film was applied on a PET film having a thickness of 75 # m which was subjected to a release treatment, and the thickness after drying was dried at 80 ° C for 3 minutes to form an adhesive layer. Except for this, a double-sided adhesive tape was obtained by the same method as in Example 1. "Comparative Example 6] (Preparation of Adhesive Solution D) In a reaction vessel equipped with a shattering machine, reflux condensation, crying, and w translation | (in the current congee, thermometer, dropping funnel, and nitrogen inlet) 97 parts by mass of butyl acrylate, 2_G parts by mass of acrylic acid, acrylic acid 4, butyl ketone 0, Q1 f parts, 2,2,-azobisisobutyronitrile as polymerization initiator 29 201037053 The 质量" mass part was dissolved in a solvent composed of 1 part by mass of ethyl acetate, and polymerized at 701 for 12 hours to obtain an acrylic copolymer having a weight average molecular weight of 80,000 (in terms of polystyrene). Next, ethyl acetate was added and uniformly mixed to obtain an adhesive solution d having a nonvolatile content of 30%. (Preparation of double-sided adhesive tape) 2.5 parts by mass based on the mass part of the adhesive solution D 1 〇〇 "Cor〇nate L_45" (isocyanate-based cross-linking agent, solid-forming knife 45/6) manufactured by 曰 聚 polyurethane, and after stirring for 15 minutes, it was coated on a PET film having a thickness of 75/zm which was subjected to a peeling treatment, and dried. The thickness is 5〇#m, and it is dried at 8〇C for 3 minutes to form an adhesive layer. Except for this, a double-sided adhesive tape was obtained by the same method as Example i. [Comparative Example 7] (Preparation of Adhesive Solution E) A stirrer, a reflux condenser, a thermometer, a dropping funnel, and a nitrogen gas introduction were provided. In the reaction vessel of the mouth, 98 parts by mass of 2-ethylhexyl acrylate, 1 part by mass of acrylic acid, and 1 part by mass of 4-hydroxybutyl acrylate, 2,2,·azobisisobutyronitrile as a polymerization initiator 0.1 part by mass, dissolved in a solvent consisting of 100 parts of toluene acetate, and polymerized at 701 for 12 hours to obtain an acrylic octahydrate having a reset average molecular weight of 800,000 (in terms of polystyrene). Adding ethyl acetate 'evenly, to obtain a non-volatile component of 30% of the adhesive solution e. (Preparation of double-sided adhesive tape) Adding 1.8 parts by mass of the mass of the adhesive solution Polyamine S曰 company "c〇r〇nate L_45" (isocyanate crosslinking agent, solid 30 201037053 after 15 minutes 'on the thickness of the cloth after the peeling treatment' to make the thickness after drying is 5 〇β m, at 8 〇 form an adhesive layer. In addition, borrow The double-sided adhesive tape was obtained by the same method as in Example 1 by applying C on a PET film stirred with a solid content of 45%) and stirring for 75 minutes for the foam film of the above-mentioned Examples and Comparative Examples. The double-sided adhesive tapes obtained in the above examples and comparative examples were evaluated as follows. The obtained results are shown in Tables 33.

[The thickness of the foam substrate and the double-sided adhesive tape] Hunted by Ozaki made #制,生A士士

The gas thickness of the dial: (DIAL THICKNESS GAUGES, "agent, warehouse...I — ) G 孓 仃 疋. In the case of double-sided adhesive tape, the measurement is carried out after peeling off the peeling 臈. The interlaminar strength of the bulk substrate is added to the mass fraction of the adhesive solution in an amount of u by mass of the sulfonate polyamine _ "Coronate L_45" (isocyanate vinegar cross-linking agent, solid content 45%) After 15 minutes, the film was coated on a PET film having a thickness of /zm which was subjected to the release treatment, and the thickness after drying was a claw, and dried at 8 Torr for 3 minutes to form an adhesive layer. Next, the interlayer strength was evaluated. After bonding each of the above-mentioned adhesive layers on both sides of the foam, lamination was carried out by using a line C 5 kgf/em. Thereafter, the aging was performed for 4 hours in the 4th generation to prepare a double layer for measuring the interlayer strength. Adhesive tape. ^, the side-adhesive surface is lined with a thickness of 25 # m of polyethylene terephthalate film 2cm wide and 1 〇 coffee length (the flow direction of the foam substrate) Lightly surveyed with a sample, in the environment of 23t · 5G% RH, use the called pro on the stainless steel plate The pressure is applied back to the hunger, and after being placed in the 23 C for 24 hours, the measurement is carried out at a tensile speed of 300 mm/min in the environment of 23 <>c · 5〇%rh 31 201037053, Strength (N/cm) when the foam is torn (damaged to the substrate) in the direction of 9 twist. [Tensile modulus, tensile strength] The processing is made into a line spacing of 2 cm (foam base) The flow direction of the material), the foam substrate of the test piece having a width of 1 cm or the double-sided adhesive sheet (peeling off the release film), and stretching at a tensile speed of 3 〇〇mm/min to the maximum strength during cutting [Average bubble diameter in the flow direction and the width direction of the foam base material]: The foam base material is cut in the width direction and the flow direction, and the second is: mirror (manufactured by 曰立制制, S' After the knives of the cut surface of the cut foam substrate are enlarged by 5 times, the cross section of the foam material is cut in the visibility direction or the flow direction. The section is in the thickness direction of the substrate, and the length of the soil U ^ . is accommodated in the projection: in the obtained photograph, the flow direction is measured or ^ The actual length of the magnified 刖 is 2mm - and ° ^ The cut surface of the knives is the total bubble diameter present, and the average bubble diameter is calculated from the average value. [The average bubble in the thickness direction of the foam substrate Diameter] The flat soil (four degrees) of the flow direction of the hair base material photographed by the SEM was measured, and the foaming was performed, and the same conditions were obtained: In the photo taken, a number of foaming patterns are present in any place where a, 曰Α, and the body substrate are borrowed, and the "average gas in the thickness direction = the number of bubbles in the direction" is based on the thickness of the next straight (10) - Zhao substrate 32 201037053 The average value of the average bubble diameter was measured by taking the average value as the thickness at three places of Rensi. [Face bonding strength 1] 1) At 23t, two double-sided adhesive tapes with a width of 5mm and a long household skill of 4cm are placed in parallel (4) Aluminium plate with a thickness of 2mm丨5em square (Mitsubishi Liyang (8) Manufactured ACRYUTEMR2()() (trade name), hue: transparent).

2) Next, an acrylic plate with a double-sided adhesive tape made of enamel is attached to a rectangular ABS plate having a diameter of lem at the center and a rectangular ABS plate (manufactured by Takiron Co., Ltd., Hue: natural color, invincible pattern) 'The center of the acrylic plate and the ABS plate are the same, and after 1 kg of pressurization with 2 kg, the test piece is placed at 23t for 1 hour. 3) From the ABS side of the test piece, the acrylic plate was pressed by a tensile tester equipped with a stainless steel probe having a diameter of 8 mm by the hole of the thin plate, and the strength of the acrylic plate was peeled off. [Face bond strength 2] 1) After cutting the double-sided adhesive tape into 2 coffee squares, attach (10) the acrylic plate having a thickness of 2 mm and 2 cm square. 2) Attach the acrylic plate with the double-sided adhesive sheet to the Reny (trademark) manufactured by Mitsubishi Chemicals Co., Ltd. with a hole of 1 cm in the center and a thickness of 2 mm and 4 cm square. Name), glass fiber was added) The center of the acryl plate was the same as the center of the polyamide plate, and it was pressurized with a 2 kg roller and then placed at 23 Μ for a test piece. The ° test piece was placed on a stainless steel pedestal having a shape of 4 cm square, a height of 3 cm, and a thickness m, and the polyamine side was turned upward. 33 201037053 4) With the hole on the side of the polyamide, facing the acrylic plate, the front end has a weight of ❹ 5 and a length of 1 cm. The diameter of the brass is 间隔 § § § § § § § § § § § § § § § § § § § § § § § § § § § § Continuously falling (3 times per i stage), 敎: The height at which the tape can be peeled off or damaged can be confirmed on the test piece. Here, when the test piece after the test of the height of the flaw was not peeled off by the tape or damaged, the test was ended and it was recorded as "686 <".

5) Calculate the drop energy mJ (= 9 8 χ height (4) X 100 g) based on the measurement result. [Reprocessing suitability] υThe double-sided adhesive tape is made into a frame-shaped sample with a shape of 65 mm x 43 mm and a width of 2 mm, attached to: thick Tang 2 mm B &amp; π 7 sequence 2 mm and shape 65 mm x 45 mm acrylic plate (Mitsubishi Riyang (share) ACRYLITE MR200 (trade name), Hue: transparent, the same below). Next, it was attached to an ABS board having a thickness of 2 mm and a shape of 9 mm x 5 mm, which was made by Ding Akron Co., Ltd., hue: natural color, no sensitive pattern, the same below, and was pressed back and forth with 2 kg of rolls. After that, at 23. The crucible was left for 24 hours as a test piece. 2) For the test piece, the acrylic plate was peeled off in the vertical direction at 23 ° C, and the state of the tape at this time was evaluated. 3) Next, the double-sided adhesive tape remaining on the ABS or acrylic plate was peeled off by a hand at a peeling angle of about 135 degrees, and the ease of peeling at this time was evaluated. ◎: There was no interlaminar crack in the substrate and it was peeled off without a paste residue. 〇: Although the foam substrate is ruptured between the layers, the double-sided adhesive tape remaining after the hand can be peeled off without any residue. x: The paste remains on the adherend. Or the foam substrate is ruptured between the layers, and after the use of the double-sided adhesive tape which is left by hand, it cannot be peeled off. [re-peelability]

1) A double-sided adhesive tape was formed into a frame-shaped sample having a shape of 65 mm x 43 mm and a width of 2 faces, and attached to an acrylic plate having a thickness of 2 mm and a shape of 65 mm x 45 mm. Next, an aBS plate having a thickness of 2 mm and a shape of 9 mmx5 mm was attached, and after pressing back and forth with 2 kg of rolls, it was left for 24 hours. 2) Next, at 60. 〇 · After being placed in an environment of 9〇% RH for 7 days, it was placed in a 23 C · 50% RH environment as a test piece. 3) For the test piece, at 23 C, the acrylic plate was peeled off in the vertical direction, and the state of the tape at this time was evaluated. 4) Next, the double-sided adhesive tape remaining on the ABS or acrylic plate was peeled off by a hand at a peeling angle of about 135 degrees, and the ease of peeling at this time was evaluated. ◎. Interlayer cracks in the non-foamed substrate, which were subsequently peeled off without paste residue. 〕 · Although the foam substrate is ruptured between the layers, it can be peeled off without any residue when the double-sided adhesive tape remaining after the hand is left by hand. X: The paste remains on the adherend. Alternatively, the foam substrate may be ruptured between the layers, and thereafter, the double-sided adhesive tape remaining by hand may not be peeled off. [Follow-up test] 双面 The double-sided adhesive tape was cut into a width of 1 cm and a length of 5 cm, and attached to a central portion in the width direction of an acrylic plate having a thickness of 2 mm and a width of 2 cm x a length of 5 cm to make an acrylic having a double-sided adhesive tape. board. (Fig. 2) Next, two adhesive tapes of a polyethylene terephthalate substrate having a thickness of 20 mm and a length of 2 mm and a length of 2 cm were attached in parallel in the width direction at intervals of km 35 201037053 Attached to the center portion of an acrylic plate having a thickness of 2 mm and a width of 2 cm x 5 cm, an acrylic plate with a height difference was formed (Fig. 2). After the acrylic plate with the double-sided adhesive tape was placed on the adhesive tape portion of the acrylic plate with the high and low difference at 3 C, the back of the 2 kg was subjected to one press-back (Fig. 3). 4) From the side of the acrylic plate with the height difference, the following state of the double-sided adhesive tape in the vicinity of the height difference was evaluated by visual observation. 〇. The double-sided adhesive tape is adhered to the acrylic plate with the height difference. The X·refractive t-belt is not close to the height difference, and is not close to the acrylic plate with the height difference. [Water resistance test 1] The rear adhesive tape was formed into a frame-like mouth having a shape of 65 mm x 45 mm and a width of 2 mm, and was attached to the thickness 2 in a simple shape. Yan (4) leg of C

After the plate was attached to an ABS plate having a thickness of 2 mm and a shape of 65 mm x 45 mm, one back pressure was applied with a 2 kg roller, and then placed at 23 ° C for 24 hours as a test piece. 2) After immersing the test piece in a 5 f amount % surfactant solution (made by tapping water and making J 〇 Y manufactured by G), the test piece was taken out for 3 minutes after being placed for 10 minutes. Evaluate whether there is any immersion in the frame when the solution is again immersed in the solution. 〇. No immersion water x. Immersion water [water resistance test 2]) Winter surface adhesion ▼ made into a shape of 65mmx45mm and a width of 2mm ‘, 爿, sample °° attached to a thickness of 2mm and a shape of 65mmx45mm C 36 201037053

After the olefin plate, it was attached to the center of the ABS plate having a thickness of 2 mm and an outer shape of 15〇1111^1〇〇111111 (Fig. 4). After pressurizing i back and forth with a 2 kg roller, it was placed at 23 C for 24 hours to serve as a test piece. 2) At 23 C, a U (π) subtype measuring table with a length of 15 mm, a width of 1 mm, and a height of 5 mm is set on the pedestal of the DuPont-type impact tester (manufactured by TESTER Industries Co., Ltd.) (thickness Ingredient), on which the test piece is loaded with the acrylic plate facing down (Fig. 5). From the side of the abs plate, a stainless steel shot core having a diameter of 0 25 η ΐΐ and a volume of 300 g was dropped from a height of 3 〇 cm, and impact on the central portion of the ABS plate was applied five times at intervals of 10 seconds (Fig. 6). Here, when the impact is applied and the acrylic sheet falls off, the test is terminated. 3) The test piece that has been subjected to the impact is implemented at 23. 5% by mass of surface 〖 生 / / / 生 生 生 生 生 生 生 生 生 生 生 生 生 生 生 生 生 生 生 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 Whether there is water immersion in the frame during the solution. ◎: There was no water immersion, and the appearance of the foam did not change. 〇 〇. Although there is no water immersion, it is confirmed that a part of the foam layer has a slight laceration. X. There is water, or the acrylic plate is detached at the stage of the impact. [Air tightness test]. 1) The double-sided adhesive tape was formed into a frame-like sample having a shape of 5 cm x 4 cm in width and attached to an open-cell acrylic plate having a thickness of 2 mm and a shape of 5 cm x 5 cm and having a straight &amp; 3 mm hole in the center, attached to the thickness and having a shape of 7 cmx5 cm. The center of the rectangular acrylic plate (Fig. is used after a press of 1 back and forth, 纟 23t placed for 24 hours, as test 37 201037053. 2) At 23 ° C, from the open hole acrylic plate, A pressure of MPa 2 MPa was applied with nitrogen (Fig. 8). 3) Determine the time until nitrogen leaks from the sash-like tape portion. Table 1 Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Adhesive type AAAAAABBA Coating thickness|&gt;m] 35 35 35 50 50 35 35 50 70 Gel fraction [%] 46 46 46 46 46 33 46 46 46 Tan &lt;5maximum temperature [°C] -11 -11 -11 -11 -11 -11 -Ί -7 -11 White poly black poly white Poly white poly black poly white poly white poly black black poly mm olefin olefin olefin olefin olefin olefin olefin EVA olefin system thickness [# ηι] 130 130 100 300 500 130 130 800 200 25% compressive strength [ kPa] 130 150 110 92 98 130 130 34 34 Inter-base strength [N/cm] 18.0 20.0 12.8 23.0 15.0 18.0 18.0 33.6 15.0 Material tensile modulus [N/cm2] 1140 1200 1080 510 250 1140 1140 310 520 Stretching Strength [N/cm] 14.8 15.0 10.8 15.3 12.5 14.8 14.8 24.8 10.0 Average gas thickness direction 25 30 30 75 63 25 25 100 50 Bubble diameter Flow direction 210 130 137 136 302 210 210 320 400 (#m) Width direction 273 168 178 180 376 273 273 150 630 Foaming rate [times] 2.5 2.5 2.7 5 10 2.5 2.5 8.0 5 Thickness [//m] 200 200 150 400 600 200 200 900 340 Tan &lt;5maximum temperature [°C] -1 -1 -1 -3 -2 -1 5 5 -1 Double汪115max[-] 0.74 0.74 0.74 0.80 0.55 0.74 0.73 0.45 0.64 Surface adhesion strength l[N/4cm2] 150 155 140 180 170 150 130 130 160 Surface adhesion strength 2[mJ] 490 588 392 588 686 490 490 686&lt 392 Reprocessing suitability ◎ ◎ ◎ ◎ ◎ ◎ 〇 ◎ 再 再 再 ◎ ◎ ◎ ◎ ◎ 跟随 belt follow-up test 〇〇〇〇〇〇〇〇〇 waterproof test 1 〇〇〇〇〇 〇〇〇〇Water resistance test 2 ◎ ◎ 〇 ◎ ◎ ◎ ◎ ◎ 〇38 201037053

Comparative Example 1 Example 2 Comparison Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Adhesive Type AAAAAAB Coating Thickness [ym] 50 50 70 50 50 35 35 Gel Fraction [°/〇 ] 46 46 46 46 46 33 46 Tan (5 max. temperature [°C] -11 -11 -11 -11 -11 -11 -7 Black polyolefin white polyolefin non-woven PET white polyolefin white polyolefin White polyolefin thickness [//m] 100 100 - 100 500 130 130 25% compressive strength [kPa] 70 190 - - 98 130 130 Inter-base strength [N/cm] 10 24.3 - - 18 18 18 Material stretching Elastic modulus [N/cm2] 770 1600 - - 1140 1140 1140 Tensile strength [N/cm] 8.0 16.0 16.0 210.0 14.8 14.8 14.8 Average gas thickness direction 50 20 — — 25 25 25 Bubble diameter flow direction 500 209 - - 210 210 210 (μτη) Width direction 650 230 - - 273 273 273 Foaming rate [倍] 3 2 - - 2.5 2.5 2.5 Thickness [^m] 200 200 150 200 200 200 200 Tan 5 Maximum temperature [°C] - 1 -1 -11 -11 -5 -25 -30 Double-sided Tan 5 maxima [-] 0.75 0.79 1.77 1.82 0.83 0.86 0.82 Surface adhesion strength l[N/4cm2] 140 150 12 0 140 120 90 34 Surface adhesion strength 2 [mJ] 196 588 294 392 490 294 196 Adhesive rework suitability X ◎ ◎ ◎ X ◎ ◎ Re-peelability X ◎ ◎ ◎ X 〇 ◎ Belt follow-up test 〇 XXX 〇 XX Water resistance test 1 〇 XXX 〇 XX Water resistance test 2 〇 XXX ◎ XX 39 201037053

Example 10 Example 11 Type FG Adhesive coating thickness [//m] 35 35 Gel fraction [%] 53 40 Agent storage elastic modulus at 20 ° C [xl05Pa] 4.0 3.2 Tan (5 max temperature [° C] -3 8 kinds of white polyolefin white polyolefin system thickness [Am] 130 130 25% compressive strength [kPa] 130 130 interlayer strength [N/cm] 18.0 18.0 material tensile modulus of elasticity [N/cm2] 1140 1140 Tensile strength [N/cm] 14.8 14.8 Average gas thickness direction 25 25 Bubble diameter Flow direction 210 210 (/zm) Width direction 273 273 Foaming rate [times] 2.5 2.5 Thickness [//m] 200 200 Tan 5maximum temperature [°C] 7 16 Tan 5 max. [-] 0.5 0.66 double-sided strength l[N/4cm2] 160 180 surface adhesion strength 2[mJ] 294 294 adhesive rework suitability Peeling tape following test 〇〇 Water resistance test 1 〇〇 Water repellency test 2 〇 ◎ Air tightness test 80 minutes 60 minutes As can be seen from the above Examples 1 to 9, the double-sided adhesive tape of the present invention has both Excellent adhesion and reworkability and re-peelability of the adherend. Further, Example 10 11 double-sided adhesive tape, with excellent adhesion, 40 201037053 # processing suitability, but also has a suitable airtightness. On the other hand, in the double-sided adhesive tape of Comparative Example 1, due to Since the interlaminar strength tensile strength of the foam base material is low, it is difficult to remove the double-sided adhesive tape during reworking or re-peeling in practical use. In addition, the double-sided adhesive tape of Comparative Examples 2 to 4 is followed by ° Since the properties were inferior, it was confirmed that water immersion was observed in the water repellency test, and it was difficult to achieve water repellency. In Comparative Example 5, it was difficult to peel off the adhesive tape at the time of reworking and re-peeling, and Comparative Examples 6 and 7 In other words, the adhesion is low, and it is difficult to achieve water resistance. 〇L Yuan Wu simple explanation] Figure 1 shows the conceptual diagram of the acrylic plate with double-sided adhesive tape for follow-up test. Micrograph I non-following test A conceptual diagram of an acrylic plate with a height difference.

G % says " &lt; section direction" is a conceptual diagram with a double-sided dot tape for the follow-up test. Figure 4 showing the adhesion state of the acrylic plate with a low gap between the turns shows the test for the water resistance test 2 Conceptual diagram of the sheet. The method of measuring the water repellency test 2 of the measuring board with the acrylic acid plate facing downwards is determined by using the == Η-shaped measuring table 6 (thickness of one product), from the measurement a Α &amp; — _ , ° Fig. 8 is a conceptual diagram of an operation of a test piece in which the airtightness test is performed. Fig. 8 is a conceptual diagram showing an operation of applying pressure to the test piece. [Main component symbol description] 1 Double-sided adhesive tape 2 Acrylic acid plate 3 Adhesive tape for height difference 4 Evaluation of follow-up parts 5 ABS plate 6 Place where impact is hit by the core 7 Drop impact core 8 U-shaped measuring table 9 open-cell acrylic plate 10 3 mm thick acrylic plate 11 nitrogen inlet pipe 12 nitrogen 42

Claims (1)

201037053 VII. Patent application scope: Ο 1. A double-sided adhesive tape having an adhesive layer on both sides of a foam substrate, characterized in that the interlayer strength of the foam substrate is 12N / (10) In the above, the 25% compressive strength is 3 Å to 丽, and the adhesive layer is composed of an acrylic pressure-sensitive adhesive composition. The acrylic pressure-sensitive adhesive composition contains an acrylic copolymer and a polymerized rosin I-based adhesion-providing resin. The acrylic acid-based copolymer contains a (meth) acrylate having 4 to 12 carbon atoms and a vinyl monomer having a carboxyl group as a monomer component. 2. The double-sided adhesive tape of the applicant's patent range, wherein the foam substrate has a tensile modulus of more than cm 2 or more and a tensile strength per unit width of 1 ON/cm or more. The double-sided adhesive tape of item 1 or 2, wherein the average bubble diameter in the thickness direction of the hair material is M00, and the average bubble diameter in the flow direction and the width direction is J 2 to 700" m ^ 4. In the third aspect of the range, the double-sided adhesion is the same as the thickness of the foamed substrate, and the ratio of the average bubble diameter to the thickness of the bubble is the average of the width direction of the longitudinal direction. The ratio of the diameter of the bubble is straight and then relatively thick. 5. The double-sided adhesive tape substrate of the item of the patent application is a polyolefin-based foam substrate. The double-sided adhesive tape of the item [or item 2] is used in the copolymerization of 16100 parts by mass of the propionic acid-based copolymer, and contains: 10 to 40 parts by mass of the resin to be added in the opposite direction. A double-sided adhesive tape of 1 or 2, wherein the 'dilute acid copolymer contains B, 43, 2010, 370, 153, which has a tertiary amine skeleton in the molecule as a monomer component. 8. The electronic machine 3 is regenerated or reused as claimed in the patent application. Double-sided adhesive tape for components of the device 9. If you apply for a patent, ^ ^ ^ Dimensional adhesive tape of 1 or 2, 'Electronic machine with waterproof function, foam for solid bubble formation, (4) Bubble base The material is a double-sided adhesive tape of the broadest _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 10°c. 11. The double-sided adhesive tape of claim 1, wherein the double-sided adhesive tape exhibits a maximum value of the loss tangent in the dynamic viscoelastic spectrum at a frequency of 1 Η Z is _3〇~2 〇. (3 'The maximum value of the loss tangent is the following. VIII. Schema: (such as the next page) 44