TWI356088B - Double-sided adhesive tape for attaching rubbing c - Google Patents

Description

[Comparative Description of the Invention] [Technical Field of the Invention] The present invention relates to a rubbing cloth attached with a double-sided adhesive tape and a friction roller attached thereto. More specifically, the present invention relates to a rubbing cloth for rubbing an alignment film or the like of a liquid crystal display device on a roll, suppressing occurrence of floating of the double-sided adhesive tape at an interface with the roll, and the like, and reducing the orientation spot. The rubbing cloth is attached with a double-sided adhesive tape; and the roller roll to which the double-sided adhesive tape is attached is attached with a friction sheet. [Prior Art] Conventionally, in order to restrict the alignment of the liquid crystal molecules of the alignment film of the liquid crystal display device, the rubbing treatment is performed. The cloth used for the treatment is called a rubbing cloth, and the fluff is made of velvet composed of fibers such as cotton, rayon, and triacetate. Fabric. The rubbing cloth is attached to the rubbing roller by double-sided adhesive tape for rubbing treatment. After the repeated rubbing treatment, the fluff of the rubbing cloth is worn, so that it is necessary to peel off from the rubbing roller after the completion of the given loop, and replace the new rubbing cloth. Therefore, the double-sided adhesive tape is desirably peeled off together with the rubbing cloth and the adhesive does not remain on the drum surface. The double-sided adhesive tape is usually a base film made of a polyethylene terephthalate film having a thickness of about 10 to 30 μm, and an adhesive tape having an adhesive layer on both sides (see Patent Document 1). In recent years, in order to increase the size and productivity of a liquid crystal display device, the size of a glass plate in which a plurality of oriented films are generally called a mother glass is increased, and the length of the friction roller to which the friction cloth is fixed is also lengthened. As a rubbing cloth, the velvet fabric used is usually woven in a width of 11 〇 to 150 cm, so in order to correspond to the long rubbing roller, a powerful means is to divide the rubbing cloth, and a plurality of rubbing cloths are attached in the vertical direction of the rubbing roller shaft. . 1356088 The method of attaching a plurality of rubbing cloths to the rubbing roller can be considered as follows: 1) first attaching a double-sided adhesive tape to the rubbing roller, and then arranging and attaching the rubbing cloth thereon; 2) pre-applying a plurality of rubbing cloths A method of attaching the side of the double-sided adhesive tape to the integrated roll and attaching it to the friction roller. As a method of attaching the rubbing cloth to the rubbing roller, it is generally carried out by first peeling off the peeling sheet on one side of the double-sided adhesive tape so that the exposed adhesive layer faces upward, is placed at a given position, and is placed at the end thereof. Rubbing the roller, after rotating the roller, attaching the double-sided adhesive tape to the friction roller, placing the friction cloth pile down in a given position, and peeling off the other side of the double-sided adhesive tape attached to the friction roller Also, the friction roller to which the double-sided adhesive tape is attached is rotated, and the rubbing cloth is attached. In the method (1), when a friction cloth is attached to both surfaces of a base film composed of a polyethylene terephthalate film having a thickness of 25 and a double-sided adhesive tape provided with an adhesive layer, There is no floating between the rubbing roller and the double-sided adhesive tape, but the fluff of the rubbing cloth is slightly inclined obliquely, so there is a problem that the rubbing cloth is misaligned depending on the pressure at the time of attaching. Further, in the method (2), the double-sided adhesive layer provided with the adhesive layer is also used on both sides of the base film made of a polyethylene terephthalate film having a thickness of 25/m. When the tape is attached to the rubbing cloth, although the rubbing cloth can be attached to the double-sided adhesive tape accurately and firmly, and can be accurately attached to the rubbing roller, floating between the rubbing roller and the double-sided adhesive tape occurs. . This phenomenon is considered as follows. The double-sided adhesive tape substrate and the friction cloth itself have low rigidity (PET25 A m: Gurley stiffness is about 80 mN 'rubbing cloth: Gurley stiffness is about 400 to 800 mN). Therefore, in the method (1), the attachment can be performed without causing the floating 1356088. However, if they become integrated stratification, the Gurley stiffness will increase the single digit of about 5000~8000mN, and when the laminate is attached to the cylindrical friction roller, the internal stress will be generated by the internal and external circumferential differences. A float occurs between the roller and the double-sided adhesive tape. (Gurley Stiffness: Based on: [·ΤΑΡΡΙ Pulp Test Method No. 40, using a Gurley Softness Tester (manufactured by Toyo Seiki Seisakusho Co., Ltd.), measuring both sides of the double-sided tape substrate and the rubbing cloth, The average enthalpy is used as the Gurley stiffness. The laminate is obtained by attaching a rubbing cloth to a material having a rubbing cloth attached to the adhesive layer on one side of the double-sided adhesive tape substrate, and measuring it in the same manner as above. Yes, if a portion of the fleece at the cut of the rubbing cloth at the center of the rubbing roller is misaligned according to the texture of the base fabric, the rubbing treatment is performed in a state where the fluff length is long, or if the fluff in the dislocation is involved in other fluff during the rubbing process The rubbing treatment is carried out in a part of the state, which may cause the orientation film to be oriented. Therefore, it is necessary to make the fluff of the cut surface difficult to be displaced. [Patent Document 1] JP-A-2002-220570 [Abstract]

[Problem to be Solved by the Invention] The present invention has been made in view of the above circumstances, and an object thereof is to provide a friction cloth for rubbing a alignment film or the like for rubbing a liquid crystal display device on a rubbing roller, and in order to correspond to the "attachment process" And the problem of corresponding to a large-sized glass substrate, and the double-sided adhesive tape for suppressing the friction of the double-sided adhesive tape to be generated at the interface of the friction roller, and the double-sided adhesive tape and one or more pieces of cloth become Integral, it is possible to correspond to a roller-attachment friction plate which can reduce the orientation spot or the orientation 瑕 of the long roller. [Technical means for solving the problem] 1356088 The inventors found that in order to achieve the above-mentioned purpose, it was found that For the friction roller attached to the double-sided adhesive tape and the rubbing cloth above the friction cloth, in order to suppress the floating between the friction roller and the adhesive layer, it can be attached to the roller. The internal stress generated when the friction roller was attached with the friction lining was moderated by the base film of the double-sided adhesive tape, so that the following findings were obtained. Further, it has been found that when the base yarn composed of the thermoplastic synthetic fiber constituting the base fabric is welded to the other ground yarns or the thermoplastic synthetic fiber of the base yarn is deformed by melting, the fluff which is favorable for the cut surface of the rubbing cloth is difficult to be dislocated. The invention provides the following findings. The present invention provides: (1) A double-sided adhesive tape for rubbing cloth, characterized in that it has an adhesive layer attached to the drum on one side of the base film. I. On the other side, a rubbing cloth with a rubbing agent layer π attached to the rubbing cloth is attached with a double-sided adhesive tape, and a film having a tensile stress of 3,000 MPa or less at a stretching of 1% is used as a base film. (1) The double-sided adhesive tape attached to the rubbing cloth described above is characterized in that the tensile stress when the base film is stretched by 1% is 200 to 2600 MPa. (3) The friction as described in (1) or (2) The double-sided adhesive tape is attached to the cloth, and the base film is a polyolefin-based resin film. (4) The double-sided adhesive tape for rubbing cloth attached according to any one of (1) to (3), It is characterized in that the substrate film is stretched by 10% and the stretching is stopped for 1 minute. (5) A friction sheet for a roller roll, characterized in that the friction cloth attached to any one of (1) to (4) is adhered with a double-sided adhesive tape. At least one rubbing cloth is attached to the adhesive layer ', and the fluff is attached to the surface side to be integrated into a single 1356088. (6) The friction wrap for a roll according to (5), characterized in that a plurality of pieces are rubbed The cloth is butted to the edge of the cloth, and the double-sided adhesive tape is attached to the joint formed by the edge of the butt cloth, and the plurality of friction cloths are connected. (7) The friction roller attached to the drum according to (6) It is characterized in that the joint of the rubbing cloth is linear, and the angle of the rubbing cloth to the rubbing direction is ~ degrees ~ 45 degrees.

(8) The friction wrap for a roll according to any one of (5) to (7), wherein the rubbing cloth is a velvet fabric woven on the base fabric by weaving fluff in a pile shape. From the fibers of cotton, rayon, cellulose acetate, high-moisture modulus viscose, tencel, nylon, polyester and vinylon, and the warp and weft of the bottom yarn constituting the base fabric are synthesized by thermoplastic Fiber composition.

(9) The friction lining for roller roll according to any one of (5) to (8), wherein the edge of the cloth of the rubbing cloth is melted, and the base yarn composed of thermoplastic synthetic fibers constituting the base fabric at the edge and the other A state in which the ground yarns are welded to each other, or a state in which the thermoplastic synthetic fibers of the ground yarn are deformed by melting. [Comparative to the effects of the prior art] According to the present invention, it is possible to provide a rubbing cloth for attaching a film or the like for rubbing a liquid crystal display device on a rubbing roller, and suppressing occurrence of floating of the double-sided adhesive tape at the interface of the rubbing roller to be reduced The rubbing cloth of the oriented spot is attached with a double-sided adhesive tape, and the double-sided adhesive tape and one or more pieces of cloth are integrated, and can correspond to the friction wrap of the roll of the large friction roll. Further, in the squeezing fabric for the drum roll of the present invention, the velvet fabric used as the rubbing cloth is cut by the hot melt cutting method by selecting the bottom yarn constituting the base fabric and cutting the friction 1356088 cloth. The bottom yarn is melt-bonded between the broken yarns, or the front end portion of the bottom yarn is deformed in a spherical shape or a flat shape to prevent the fluff from being peeled off or peeled off. As a result, the orientation or orientation is further reduced, and the long friction roller can also be used. Effective correspondence. The rubbing cloth attached with the double-sided adhesive tape of the present invention can be used for attaching a rubbing cloth for rubbing the alignment film or the like of the liquid crystal display device on the drum, and can suppress the occurrence of floating of the double-sided adhesive tape at the interface with the drum. Reduce orientation spots. By attaching the double-sided adhesive tape to the rubbing cloth, it is possible to provide a friction wrap for a roll that can correspond to a large friction roller. [Embodiment] The double-sided adhesive tape for rubbing cloth attachment of the present invention is a double-sided adhesive tape for wrapping a rubbing cloth on a roll, and has an adhesive layer I attached to the roll on one side of the base film. On the other side, there is a layer of adhesive attached to the rubbing cloth. As described later, the double-sided adhesive tape is preferably used to form at least one rubbing cloth attached to the adhesive layer π, and the fluff is attached to the surface side to form an integrated roller-wound friction sheet. The roller-wound friction plate is attached to the drum via the lining agent layer I. At this time, since the fixing radii of the base fabric portion of the rubbing cloth and the base film of the double-sided adhesive tape are different, an internal and external circumferential difference is caused, and as a result, internal stress is generated. This internal stress acts on the weak side of the bonding force, and if the usual double-sided tape for friction is used, it will cause floating at the interface with the roller. In the double-sided adhesive tape of the present invention, in order to absorb the internal stress and suppress the occurrence of floating, a film having a specific property, that is, a film having a tensile stress of 3,000 MPa or less at a stretching of 1% is used as a base film. . If the tensile stress exceeds 3000 MPa, the substrate film cannot sufficiently absorb the internal stress, and the object of the present invention cannot be achieved. From the aspect of absorbing internal stress, the tensile stress at the stretching of 1% is preferably selected at 200. ~2600MPa range. The tensile stress at which the base film was stretched by 1% was 値 measured based on JIS K 7127.

Further, as the base film, a film having a stress of 20 N/15 mm or less after stretching the base film by 10% and stopping the stretching for 1 minute is preferably used. If the above stress exceeds 20 N/15 mm, the substrate film cannot sufficiently buffer the stress, and the object of the present invention cannot be attained. From the viewpoint of relaxation stress, the above stress is further preferably selected in the range of 4 to 18 N/1 5 mm. The stress after stretching the base film by 10% and stopping the stretching for 1 minute was measured as follows. That is, the substrate sheet was cut into a width of 15 mm and a length of 150 mm, and a test piece "Using TENSIRON RTA-100" manufactured by ORIENTEC Co., Ltd. was used, and the gap between the chucks was set at 100 mm, and the test was performed at a speed of 20 mm/min. Tablets were taken for measurement.

The base film of the double-sided adhesive tape of the present invention is not particularly limited as long as it satisfies the above characteristics, and various materials can be used. For example, a polyolefin resin or a soft polyvinyl chloride resin or the like is preferably used. The polyolefin-based resin is not particularly limited, and examples thereof include olefins such as ethylene, propylene, 1-butene, 3-methylbutene-1, 3-methylpentene-1, and 4-methylpentene-1. Homopolymers or copolymers thereof, or copolymers with unsaturated monomers which can be copolymerized with them, and the like. Representative examples include high-density, medium-density, low-density polyethylene or linear low-density polyethylene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, and the like, a propylene-ethylene block copolymer or A soft polypropylene such as a disordered copolymer or a propylene-ethylene-diolefin compound copolymer, polybutene-1, poly-4-methylpentene-1 or the like. These may be used alone or in combination of two or more. Among them, -11- 1356088 is especially preferred for low density polyethylene and linear low density polyethylene. On the other hand, the polyvinyl chloride-based resin in the soft polyvinyl chloride-based resin may, for example, be a polyvinyl chloride having a number average polymerization degree of about 800 to 2,500, or a copolymer having a main body of vinyl chloride (e.g., ethylene-vinyl chloride copolymer, vinyl acetate). An ester-chloroethylene copolymer, a vinyl chloride-halogenated olefin copolymer, or the like, or a mixture of these polyvinyl chloride or vinyl chloride copolymers with other compatible resins, and the like. These polyvinyl chloride-based resins may be used alone or in combination of two or more.

The soft polyvinyl chloride resin can be prepared by blending 15 to 50 parts by weight of a plasticizer to 100 parts by weight of the above polyvinyl chloride resin. The above plasticizer may use, for example, di-n-octyl phthalate, di-2-ethylhexyl phthalate, diisononyl phthalate, diisononyl phthalate or the like. a formic acid derivative; an isophthalic acid derivative such as diisooctyl isophthalate; an adipic acid derivative such as dioctyl adipate; in addition to tricresyl phosphate 'trisyl phosphate, epoxidized Soybean oil, etc.

The thickness of the substrate film is not particularly limited, and is usually from 1 〇 to 120 μm, preferably from 20 to 100//m. In the present invention, the base film can be subjected to physical or chemical surface treatment such as an oxidation method or a roughening method in accordance with a desired purpose, that is, in order to improve the adhesion to the adhesive layer provided thereon. The above oxidation method may, for example, be a corona discharge method, a chromic acid treatment method, a spark treatment method, a hot air treatment method, an ozone and ultraviolet irradiation treatment method, or the like. Further, the embossing method may, for example, be a sandblasting method or a solvent treatment method. These surface treatment methods can be appropriately selected depending on the type of the film, but it is preferable to use a corona discharge treatment method from the viewpoints of effects and workability. -12- 1356088 In the double-sided adhesive tape of the present invention, the adhesive layer I attached to the roll is provided on one side of the base film, and the adhesive layer 贴 to which the rubbing cloth is attached is provided on the other side. The adhesive for the adhesive layer I and π is not particularly limited. Any of the adhesives conventionally used for the double-sided adhesive tape for rubbing can be appropriately selected. For example, an acrylic adhesive, a rubber-based adhesive, an anthrone-based adhesive, a polyurethane-based adhesive, and a polyester-based adhesive can be used. Among them, an acrylic adhesive is generally selected. Rubber adhesive. The acrylic adhesive may use at least one selected from the group consisting of (meth)acrylate homopolymers, copolymers containing two or more (meth)acrylates, and (meth)acrylates and other functions. The 'substance of the copolymer of a monomer. Examples of the (meth) acrylate include butyl (meth)acrylate, amyl (meth)acrylate, hexyl (meth)acrylate, heptyl (meth)acrylate, and octyl (meth)acrylate. Ethyl (meth)acrylate, decyl (meth)acrylate, and the like. Further, examples of the functional monomer include hydroxyl group-containing monomers such as hydroxyethyl (meth)acrylate and hydroxypropyl (meth)acrylate, (meth)acrylamide, and dimethyl(meth)acrylonitrile. A carboxylic acid-containing monomer such as a guanamine monomer such as an amine or a (meth)acrylic acid. The rubber-based adhesive may use at least one selected from the group consisting of natural rubber, polyisoprene rubber, polyisobutylene, polybutadiene rubber, styrene-butadiene-styrene block copolymer, and benzene. A substance such as an ethylene-prenyl-styrene block copolymer. These adhesives may be blended with a crosslinking agent, an adhesion-imparting agent, an antioxidant, a chelating agent, or the like as needed. In order to prevent the adhesive from remaining on the roller when replacing the friction cloth, the adhesion of the adhesive layer I to the roller should be selected to be less than the adhesion of the adhesive layer to the friction cloth -13 - 1356088. The method of adjusting the adhesive force can be used, for example, the adhesive layer i uses a weakly adhesive adhesive and the adhesive layer Π uses a highly adhesive adhesive method to make the adhesive layer I thinner than the adhesive. A method of bonding layers, a method of combining them, and the like. Here, when a weakly adhesive adhesive is prepared, a substance having a high molecular weight or a substance having a high degree of crosslinking can be used as a resin component constituting the adhesive. In the present invention, the thickness of the adhesive layer I is generally selected from 10 to 70/zm, preferably from 20 to 50/m, and the thickness of the adhesive layer is generally selected from 30 to 80 ym, and should be selected from 40 to 70 m 〇' Further, the adhesive layer I may be provided with irregularities to prevent air from remaining between the adhesive layer I and the roller when attached to the roller. By providing the concave projection, the air flows to the outside through the unevenness at the time of attachment, thereby suppressing residual air between the adhesive layer I and the roller. The uneven shape may be any shape as long as it can suppress air residual at the time of attachment. Examples thereof include a striped shape, an island shape, an irregular shape, a combination of these shapes, and the like. The total thickness of the double-sided adhesive tape of the present invention is preferably selected to be less than 200 from the viewpoint of reducing internal stress and uneven thickness of the product. In view of operability, the double-sided adhesive tape of the present invention preferably comprises a release sheet covering the surface of the adhesive layer I and the crucible. Therefore, each of the adhesive layers may be directly coated on both sides of the substrate film to provide an adhesive layer, but it is preferable to apply an adhesive on the release sheet to set the adhesive layer, and then attach it to the base. The film is used to transfer the adhesive layer, and the release sheet is left there. Further, in this method, when the adhesive layer 1 is provided with irregularities, the convex and concave portions corresponding to the unevenness can be provided on the release sheet. The release sheet may be, for example, a paper of 14-3056088 such as cellophane, coated paper, or high-quality paper, a paper obtained by laminating a thermoplastic resin such as polyethylene on these paper substrates, or polyethylene terephthalate. a polyester film such as polybutylene terephthalate or polyethylene naphthalate, a plastic film such as polypropylene or polyethylene can be coated with a release agent such as an organic resin; The thickness of the peeling sheet of the stomach is not particularly limited, and is usually about 20 to 150 / / m. The release sheet is easily peeled off when attaching the roller or the rubbing cloth, so that it has a size that can be extended from the adhesive layer, or a shear line is provided, or two peeling sheets are provided near the center of the adhesive layer. overlapping. The friction applied to the adhesive tape layer of the double-sided adhesive tape of the present invention is not particularly limited, and can be appropriately selected from those used in the rubbing treatment of the liquid crystal display device or the like. A representative material of the rubbing cloth can be exemplified by a velvet fabric. The fluff of the rubbing cloth uses cellulose acetate such as cotton, rayon, cellulose triacetate, high-moisture modulus viscose fiber, tencel, nylon, polyester, and vinylon to form the base yarn (warp and weft) of the base fabric. ) Use cellulose fibers such as cotton and rayon. Figures 3 and 4 are representative organization diagrams of Tianhe fabrics used for rubbing cloth. Reference numeral 31 is that the weft yarn '32 is a warp yarn, and 33 is a pile yarn. Fig. 3 is a view that the v-wool's fluff 3 3 is pressed by a weft yarn 31, so that the fluff 3 3 is easily detached. Fig. 4 is a structure in which the pile is fastened and pressed by the three weft yarns 3 1 so that the pile 33 is not easily detached. In either configuration, the piles 33 are held by the weft yarns 31. The velvet fabric used as the rubbing cloth is coated with a resin such as vinyl acetate or acrylic on the side where the base fabric is not exposed to the paper 33. However, the fluff 33 is not completely fixed, especially in the direction of the weft 31. In the case of the fabric, the warp yarns 32 of the base fabric are cut, and the piles 33 are easily detached at the ends of the fabric. Therefore, for the warp yarn 32 and the weft yarn 31 -15 - 1356088 of the velvet fabric base fabric, thermoplastic synthetic fibers such as polyester or polypropylene are used, and when the velvet fabric is cut, the hot melt cutting is performed with a heated blade. The bottom yarns are fusion-bonded, or the front end portion of the bottom yarn has a spherical shape or a flat shape such as a deformed shape to prevent peeling and falling of the pile 33. Further, at this time, if the velvet fabric is woven as shown in Fig. 4 to buckle the pile, the fusion bonding effect is better. The velvet twist is usually in the range of 12 to 50 (root/cm) and latitude 30 to 100 (root/cm). Further, the thickness of the base fabric is usually 034. 〇ιηπι, and the thickness of the pile containing the base fabric is usually 1.5 to 3.5 mm. Next, in the friction reel for roller coating of the present invention, at least one rubbing cloth is attached to the surface of the surface of the adhesive layer of the double-sided adhesive tape to be integrated. The roller roll attachment friction plate can be produced as follows. First, one or more pieces of rubbing cloth cut to a given size are placed on a flat plate-like stage to make the piles on the lower side. Then, the double-sided adhesive tape which is cut into a given size and adhered to the peeling sheet on both sides is placed on the other flat plate-like stage, and the adhesive layer is placed on the outside, and the adhesive layer π side is peeled off. The sheet is peeled off and the exposed layer of adhesive is gently attached to the base fabric of the rubbing cloth. Finally, the rubbing cloth and the double-sided attaching sheet are completely integrated in a direction from the side of the pile to be pressed by the pressure roller in the direction of the pile to be adhered. At this time, if the double-sided adhesive tape and the plate-like stage are heated to 50 to 70 ° C in advance, the adhesive is easily immersed in the woven fabric of the base fabric of the rubbing cloth, and the adhesion is more sure. Further, when a plurality of rubbing cloths are connected, as shown in Fig. 1, the edges 12, 12' of the rubbing cloths 11, 11' are butted to each other, and the joint continuity formed across the edge of the mating cloth is selected. Attach the double-sided adhesive tape to the adhesive layer, and connect the multiple rubbing cloths (two rubbing cloths in Fig. 1) into the integration of -16 - 1356088. At this time, the joint of the rubbing cloth is linear, and the angle of the rubbing cloth in the rubbing direction (0 in the first drawing) is such that it is preferable to suppress the peeling of the end portion of the friction wrap for the drum from the drum and the peeling or peeling of the fluff. Degree ~ 45 degrees, better choose 0 ~ 30 degrees. Further, the gap between the cloth edge of the joint and the edge of the cloth (L in Fig. 1) should be selected from 0.5 to 5 mm. The piles are arranged parallel to the warp yarns as shown in Figures 3 and 4. The rubbing direction of the rubbing cloth and the warp yarn of the rubbing cloth are usually set to be parallel, but they may be slightly misaligned to be unbalanced (about 2 to 10 degrees). The size of the integrated roller roll attachment friction plate is controlled by the diameter and length of the roller used. Since the drum has a diameter of 60 to 300 mm and a length of 500 to 3 000 mm, the size of the friction disc attached to the drum is about 480 to 2950 mm in length, and the width is 180 to 950 mm. Further, the number of the attached rubbing cloth is usually 1 to 3 pieces, preferably 1 to 2 pieces. Fig. 2 is a cross-sectional view showing an example of the friction sheet attached to the roll of the present invention. The roller-wound friction plate 10 is attached to the base fabric 3b on the adhesive layer Π 2b of the double-sided adhesive tape 4 on which the adhesive film layer I2a and the adhesive layer Π 2b are provided on both sides of the base film 1 The rubbing cloth 3 having the pile 3a is attached, and the peeling sheet 5 is attached to the adhesive layer I2a. In order to attach the friction roll attached to the drum roll of the present invention to the drum, first, the friction roll attached to the roll roll is placed on the lower side of the roll, and the release sheet on the side of the adhesive layer I is peeled off to expose the adhesive layer I. Next, a roller is placed on the adhesive layer I, and by rotating the roller, the friction sheet is wound around the roller via the adhesive layer I. The roller to which the friction plate is attached is attached to the friction processing device for the rubbing treatment of the alignment film or the like of the liquid crystal display device. The base film of the double-sided adhesive tape of the present invention has a tensile stress of -17 to 1356088 when the tensile strength is 1%, and the stress is less than 3,000 MPa, and the stress after stretching the base film and stopping the stretching for 1 minute is preferably used. Since the base film of 20 N/15 mm or less can absorb the internal stress caused by the internal and external circumferential difference between the rubbing base fabric and the double-sided adhesive tape base film, the double-sided adhesive tape can be suppressed as a result. Float occurs at the interface with the drum. Therefore, when the alignment film is subjected to a rubbing treatment using the rubbing treatment apparatus, an alignment film which suppresses the orientation unevenness can be obtained.

Further, in the friction sheet for roller roll attachment of the present invention, the velvet fabric used as the rubbing cloth is 'using a thermoplastic synthetic fiber as a base yarn constituting the base fabric, and the rubbing cloth is cut by a hot melt cutting method, so that the cut fabric is cut. The bottom yarns are fused together, or the front end portion of the bottom yarn is in a deformed state such as a spherical shape or a flat shape to prevent the pile from being peeled off or peeled off. As a result, the orientation 取向 or the orientation plaque can be further reduced, and the long friction roller can also be used. Effective correspondence. EXAMPLES Next, the present invention will be described in further detail based on examples, but the present invention is not limited to these examples.

The tensile stress at the time of stretching 1% of the base film and the stress after stretching the base film by 10% and stopping the stretching for 1 minute were measured in accordance with the method described in the specification. Example 1 (1) Preparation of double-sided adhesive tape A base film was a polyethylene film having a thickness of 50/m obtained from a 90:10 weight ratio mixture of low-density polyethylene and linear low-density polyethylene (abbreviated as PE50). The tensile stress at the time of stretching 1% of the PE50 was 38 0 MPa, and the stress after stretching at 10% and stopping the stretching for 1 minute was 6.4 N/15 mm. 18- 1356088 The acrylic adhesive is applied to the peeling treatment layer of a 90/zm peeling sheet (manufactured by LINTEC Co., Ltd.: trade name SP-11BY) (manufactured by Toyo Ink Co., Ltd.: trade name Oribain BPS 3 84) 1) Dry and set the adhesive layer 1 (roller side) with a thickness of 3 0 // m. Next, the release sheet is attached to one side of the PE 50 via the adhesive layer I. Then, an acrylic adhesive (manufactured by Toyo Ink Co., Ltd.: trade name: Oribain BPS8170) was applied and dried on a peeling treatment layer of a peeling sheet (manufactured by LINTEC Co., Ltd.: trade name SP-8K) having a thickness of 65 μm. Set the adhesive layer Π (cloth side) with a thickness of 50#m. Next, the release sheet was attached to the other surface of the PE 50 via the adhesive layer, and a double-sided adhesive tape with a release sheet was produced. This was cut into a width of 300 mm and a length of 550 mm to prepare a friction sheet for roller roll attachment. (2) Fabrication of the friction wrap for the roll of the roll, peeling off the release sheet on the side of the adhesive layer of the double-sided adhesive tape produced in the above (1), and the rubbing cloth (1) having the properties shown in Table 1 and (2) Each of them was cut into a width of 263 mm and a length of 480 mm, and the adhesive layer was brought into contact on the side of the base fabric side according to the method described above, and a double-sided adhesive tape was placed and gently fixed. Then, the pressure was applied from the side of the pile by inversion, and the pressure was applied to form an integrated friction sheet for roller winding. Cut off the excess double-sided adhesive tape. Further, in the above production, the double-sided adhesive tape and the plate-like stage were heated to 55 °C. (3) Evaluation The roller-attached friction piece produced in the above (2) was placed with the rubbing cloth side facing downward, and the peeling sheet was peeled off to expose the adhesive layer I. Next, on the adhesive layer I, a cylindrical glass roll -19-1956088 cylinder having a length of 500 mm and a diameter of 84 mm was placed, and the roller was rotated toward the fluff, and an integrated roller was attached to the drum. Use friction plates. Then, after the roll was attached, the film was allowed to stand for 24 hours, and the attached state of the roll and the double-sided adhesive tape was visually observed from the inside of the cylindrical glass, and the adhesion was evaluated according to the following evaluation criteria. Judging criteria 〇: According to the visual inspection, floating between the roller and the double-sided adhesive tape is not observed. X: It can be seen that the roller and the double-sided adhesive tape are floated according to the visual inspection. The results are shown in Table 2. Example 2 (1) Preparation of double-sided adhesive tape In Example 1 (1), except for using a soft polyvinyl chloride film having a thickness of 80/m [manufactured by LINTEC Co., Ltd.: trade name ENPITOUMEI 80, for 100 parts by weight The polyvinyl chloride resin was carried out in the same manner as in Example 1 (1) except that the polyvinyl chloride resin (20 parts by weight of di-n-octyl terephthalate) was used (abbreviated as PVC80). At this time, the tensile stress at the time of stretching 1% of PVC80 was 1 340 MPa, and the stress after stretching for 10% and stopping for 1 minute was 15.9 N/15 mm. (2) Preparation of the friction sheet for roller roll attachment The double-sided adhesive tape produced in the above (1) and the rubbing cloths (1) and (2) having the properties shown in Table 1 were produced in the same manner as in Example 1 (2). The roller roll is attached with a friction plate. (3) Evaluation -20 - 1356088 The friction sheet for roller roll produced in the above (2) was evaluated in the same manner as in Example 1 (3). The results are shown in Table 2. Comparative Example 1 (1) Preparation of double-sided adhesive tape In Example 1 (1), a polyethylene terephthalate film having a thickness of 25 (manufactured by Toray Industries, Ltd.: trade name Lumirror 25T-70M) was used. Except for the abbreviation of PET25), it was carried out in the same manner as in Example 1 (1). At this time, the tensile stress at the time of stretching 1% of PET25 was 5 3 30 MPa, and the stress after stretching 丨0% and stopping stretching for 1 minute was 26.4 N/15 mm» (2) Preparation of the friction sheet for roller roll attachment (1) The double-sided adhesive tape produced in the above and the rubbing cloths (1) and (2) having the properties shown in Table 1 were prepared in the same manner as in Example 1 (2). (3) Evaluation The friction wrap for drum roll produced in the above (2) was evaluated in the same manner as in Example 1 (3). The results are shown in Table 2. -21 - 1356088 Table 1 Rubbing cloth (1) Friction cloth (2) Wool cotton No. 60 double yarn cotton No. 60 double yarn velvet bottom yarn warp polyester 66 dTex polyester 168 dTex weft polyester 166 dTex polyester 1 68 dTex velvet Density (root/cm) via 15.8 17.5 weft 40.3 85.1 fabric thickness (mm) 0.25 0.6 fabric length (mm) 2.5 2.3

Table 2 Evaluation of Adhesion of Roller Attachment Friction Plates Friction Cloth (1). Rubbing Cloth (2) Example 1 〇〇 Example 2 __—— —— 〇〇 Comparative Example 1 XX As can be seen from Table 2 A roller-wound friction plate using PE50 as a base film (Example 1), and a roller using a PVC80 as a base film (Example 2) are invisible between the roller and the double-sided adhesive tape. Float occurs. However, the rubbing of the drum roll using PE2 5 as the base film (Comparative Example) was observed to occur between the roll and the double-sided adhesive tape. In the rubbing cloth (1) shown in Test Example 1, a set of two sheets of heat-melt cut into a shape as shown in Fig. 1 (a = 750 mm, b = 650 mm, c = 407 mm, 0 = 15) was prepared ( The following is called 0 15. Rubbing cloth (1)), and prepare 1 set of 2 pieces of hot melt -22- 1356088 (4) Cut into the shape as shown in Fig. 1 (a = 940mm' b = 460mm' c = 407mm, 0= 50°) sample (hereinafter referred to as 0 50° rubbing cloth (1)). (1) Fabrication of the friction wrap for the drum roll and the winding of the roll The double-sided adhesive tape produced in Example 1 (1) was cut into a width of 450 mm and a length of 1550 mm. The film was fixed on a flat plate. The adhesive layer η peels off the release sheet at the same time to expose the adhesive layer π.

Next, a set of 2 sheets 015 is placed on another flat plate-like stage. The rubbing cloth (1) is connected as shown in Fig. 1, so that the fluff side is facing downward and the wrinkle or skew is not noticed, and the adhesive layer is placed on the side of the base fabric side to place the double-sided adhesive tape. Attached 'and then reversed, applying pressure from the fluff side for adhesion. Cut off the excess double-sided adhesive tape. The gap between the two rubbing cloths is 2 mm. In this way, the friction wrap for the roller roll is produced (0=15.) „ There is also 'with the use of 0 50. The rubbing cloth (1) replaces the β 15 . The rubbing cloth (1) is the same as the above method to make the drum roll Using a friction plate (0=5〇, the roller roll attached with the thus obtained friction plate (Θ=15.) and the roller roll attached friction plate (0=50°) are each reversed' peeled off the release sheet, in the adhesive On the layer I, an aluminum friction roller having an outer diameter of 130 mm and a length of 1500 mm was placed to rotate in the forward direction of the pile, and the friction roller attached to the integrated drum was attached. (2) According to the evaluation of the friction test, Fig. 5 shows the friction. (Explanation of the test. As shown in Fig. 5, the glass plate 23 having a cutting amount d of 〇.5 mm is rubbed using the friction roller 21' to which the roller-attached friction plate 22 is attached, and rotated at a rotation speed of 120 rpm for 3 minutes. The surface of the glass plate was observed, and the operation was repeated 6 times. The rubbing treatment was performed for 18 minutes. The evaluation results after the rubbing treatment were as follows. -23· 1356088 The friction wrap for the drum roll using the θ 15° rubbing cloth (1) (θ = 15 When the), the fluff from the joint does not fall off, and the condition is good. In the case of using the friction disc (0 = 50°) of the drum roll of the 50° rubbing cloth (1), although the fluff from the joint does not fall off, the roller-wound friction piece at the front end portion of the 50° slit peels off from the drum. Part of it, part of the fluff falls off. Industrial availability

The rubbing cloth of the present invention is provided with a double-sided adhesive tape for rubbing the alignment film of the liquid crystal display device, and the friction cloth is attached to the drum, thereby suppressing the floating of the double-sided adhesive tape at the interface with the drum. To reduce the orientation spots. Using this rubbing cloth with double-sided adhesive tape, it is possible to provide a friction wrap attached to a drum roll obtained by a large friction roller. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an explanatory view showing an example of a method of joining a plurality of rubbing cloths. Fig. 2 is a cross-sectional view showing an example of the structure of the friction reel for roller roll of the present invention. Figure 3 is a diagram of the organization of a velvet fabric of V-shaped fluff. Figure 4 is a diagram of the organization of the velvet fabric with the piles fastened.

Fig. 5 is an explanatory view showing a friction test method in the embodiment. [Main component symbol description] 1 Substrate film 2a Adhesive layer I 2b Adhesive layer II 3 Friction cloth 3a Fluff 3b Base cloth-24- 1356088 4 Double-sided adhesive tape 5 Release sheet 10 Roller roll with friction plate 11 , 11' rubbing cloth 12, 12' rubbing cloth edge 2 1 friction roller 22 drum roller attached friction plate 23 glass plate 3 1 weft wire 32 warp yarn 33 fluff

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Claims (1)

1356088 /. %(°月拖拖_6正换页第093 13 1278号 "Rigid-coated adhesive tape with double-sided adhesive tape and attached roller roll attached to it" patent application (amended on October 18, 2011) Patent application scope: 1. A rubbing cloth attached with a double-sided adhesive tape having an adhesive layer I attached to the drum on one side of the base film and an adhesive layer attached to the rubbing cloth on the other side π, which is characterized in that a film having a tensile stress of less than 2 ON/15 mm after stretching the substrate film by 10% and stopping stretching for 1 minute, and a tensile stress of 3,000 MPa or less when stretching at 1% is used as a substrate. The film was stretched by 10% and the stress after the stretching was stopped for 1 minute. The test piece obtained by cutting the substrate sheet into a width of 15 mm and a length of 150 mm was used. "TENSIRON RTA-100" manufactured by ORIENTEC Co., Ltd., chuck The pitch is set at 100 mm, and the test piece is stretched at a speed of 200 mm/min. 2. The double-sided adhesive tape is attached to the rubbing cloth of claim 1, wherein the base film is stretched 1 The tensile stress at % is 200 to 2600 MPa. 3. If the patent application scope The rubbing cloth of the first item is provided with a double-sided adhesive tape, wherein the base film is a polyolefin-based resin film. 4. The double-sided adhesive tape attached to the rubbing cloth of the second aspect of the patent application, wherein the base film It is a polyolefin-based resin film. 5. A type of roller-attached friction plate is characterized in that the adhesive layer of the double-sided adhesive tape attached to the friction cloth of any one of claims 1 to 4 is applied. Attach at least one piece of rubbing cloth to make the fluffs become the surface side and form an integration. 1356088 Lunian (p month (^曰^ 丧 替换 替换 替换 修正 修正 修正 修正 修正 如 如 如 如 如 如 如 如 如 如a sheet in which a plurality of rubbing cloths are butted to each other to form a cloth edge corresponding to each other, and a joint of a double-sided adhesive tape is attached across the joint formed by the edge of the butt cloth to join a plurality of rubbing cloths. The 6-piece drum roll is provided with a friction plate, wherein the joint of the rubbing cloth is linear, and the angle of the joint of the rubbing cloth to the rubbing direction is 0 to 45 degrees. 8. The drum roll of the seventh item of the patent application scope Attached to the friction lining, where the friction A velvet fabric woven by weaving fluff in a pile fabric in a pile fabric is selected from the group consisting of cotton, rayon, cellulose acetate, high wet modulus viscose, tencel, nylon, polyester and vinylon. And the both of the warp yarns and the weft yarns constituting the bottom yarn of the base fabric are composed of thermoplastic synthetic fibers. 9. The friction roll attached to the drum roll of the eighth aspect of the patent application, wherein the cloth edge of the rubbing cloth The state in which the base yarn composed of the thermoplastic synthetic fiber and the other base yarns are welded to each other at the edge of the base fabric is melted, or the thermoplastic synthetic fiber of the base yarn is deformed by melting. 1〇, as claimed in claim 3, the rubbing cloth is attached with a double-sided adhesive tape, wherein the polyolefin-based resin film comprises low-density polyethylene and linear low-density polyethylene or a mixture of the same. Film.