WO2008056584A1 - Tissu de frottement - Google Patents

Tissu de frottement Download PDF

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Publication number
WO2008056584A1
WO2008056584A1 PCT/JP2007/071228 JP2007071228W WO2008056584A1 WO 2008056584 A1 WO2008056584 A1 WO 2008056584A1 JP 2007071228 W JP2007071228 W JP 2007071228W WO 2008056584 A1 WO2008056584 A1 WO 2008056584A1
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WO
WIPO (PCT)
Prior art keywords
fiber
conductive
rubbing cloth
rubbing
pile
Prior art date
Application number
PCT/JP2007/071228
Other languages
English (en)
Japanese (ja)
Inventor
Shonan Hata
Masashi Adachi
Original Assignee
Kuraray Trading Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kuraray Trading Co., Ltd. filed Critical Kuraray Trading Co., Ltd.
Priority to KR1020097008404A priority Critical patent/KR101494018B1/ko
Priority to JP2008543042A priority patent/JP5009300B2/ja
Publication of WO2008056584A1 publication Critical patent/WO2008056584A1/fr

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D27/00—Woven pile fabrics
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/292—Conjugate, i.e. bi- or multicomponent, fibres or filaments
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/30—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the fibres or filaments
    • D03D15/33—Ultrafine fibres, e.g. microfibres or nanofibres
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/30—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the fibres or filaments
    • D03D15/37—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the fibres or filaments with specific cross-section or surface shape
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/41—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads with specific twist
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/47—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads multicomponent, e.g. blended yarns or threads
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
    • D03D15/587—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads adhesive; fusible
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
    • D10B2321/021—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polyethylene
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
    • D10B2321/022—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polypropylene
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/04—Heat-responsive characteristics
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/16—Physical properties antistatic; conductive
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
    • G02F1/133784—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by rubbing

Definitions

  • the present invention relates to a rubbing cloth used in a rubbing process for controlling the alignment of liquid crystal molecules in a manufacturing process of a liquid crystal display device.
  • the alignment of liquid crystal molecules is regulated by forming fine grooves in an alignment film and aligning liquid crystal molecules along the fine grooves.
  • the process of forming fine grooves in the alignment film is called a rubbing process because the alignment film is rubbed with a pile cloth adhered to a rotating roll.
  • the pile cloth used here is called a rubbing cloth, and as a material, rayon, cotton or the like is currently used.
  • a rayon rubbing cloth is a velvet fabric using cupra rayon as ground yarn and normal rayon as pile yarn. After weaving, shearing, desizing and scouring are performed, and then resin processing is performed using a fibre-reactive resin to ensure the stability of the noil. Coated on the back with acrylic resin!
  • the rubbing cloth is attached to a metal roll with double-sided tape. If the ground of the pile fabric is cellulosic, it expands and contracts due to humidity. That is, it expands at high humidity and contracts at low humidity. For this reason, there is a problem that strict humidity control must be performed for precision cutting, storage, and sticking of the rubbing cloth to the rubbing roll.
  • the ultrafine fiber specifically described in Patent Document 1 is an ultrafine fiber having a fan-shaped cross-section by splitting a composite spun fiber having a hollow radial cross-section, and the present inventors When the same ultrafine fiber was used for rubbing treatment, it was found that many orientation defects occurred. The reason for this is that in the ultrafine fibers described in Patent Document 1, the ultrafine fibers that make up the pile easily fall over, and as a result, the advantages of using the ultrafine fibers despite being ultrafine fibers. It is conceivable that sex is made use of! / ,!
  • Patent Document 1 discloses that conductivity is imparted to at least the raised layer of the raised cloth in order to prevent charging during the rubbing treatment.
  • an antistatic agent such as carbon black or fine metal powder when spinning ultrafine fibers has been proposed.
  • the sheath / core structure is made of a conductive material and a non-conductive material covering the core.
  • a rubbing cloth has been proposed (see Patent Document 2), which includes a composite fiber, and the conductive material is substantially exposed on the rubbing surface.
  • the pile yarn also becomes a composite fiber force of the above-described sheath / core structure, and the pile is cut to form a ring pile! Being! /
  • the rubbing cloth described in Patent Document 2 uses a sheath / core conductive composite fiber for the pile yarn, so that the pile yarn cannot be made very thin, and the alignment film can be finely oriented.
  • the conductive composite fiber having a sheath / core structure is composed of a metal fiber, a surface metallized fiber, a carbon fiber, a conductive ceramic fiber, or the like as a core conductive material, or a carbon powder, a metal.
  • Conductive powder such as powder is kneaded into a resin and formed into a fiber that is spun, and the entire outer layer is coated with a coating material made of resin such as polyester, acrylic, polyamide, etc.
  • a coating material made of resin such as polyester, acrylic, polyamide, etc.
  • the single fiber fineness of the composite fiber is about 5 to 20 dtex, and it is difficult to obtain one with a fineness, and the pile fineness of the normal rubbing cloth (1.;! To 3.3 dtex) is significantly thicker. In partial use, it leads to rubbing spots and streaks, and in full use, an unequal electric field is not formed and corona discharge cannot be obtained.
  • Patent Document 1 describes that a vinyl acetate-based or acrylic acid-based resin is coated on the back surface to prevent the pile portion of the rubbing cloth from falling off. If a process is added, the manufacturing process of the entire rubbing cloth will be lengthened, and the cost will increase accordingly, and processing defects such as dirt in the process will increase. Thus, conventionally, rubbing that can improve the accuracy of liquid crystal display A rubbing cloth that can solve problems such as highly effective pile structure with high fineness, contamination with conductive agents, and high costs has been proposed!
  • Patent Document 1 Japanese Patent Laid-Open No. 2005_91899
  • Patent Document 2 JP 2007-232938 Koyuki Disclosure of the invention
  • the present invention has been made in view of the above circumstances, and is composed of ultrafine fibers having a special cross-section that eliminates the problem that the length, inclination angle, and uniformity of the density of the yarn yarn are problems. It provides an excellent rubbing cloth that realizes fine and uniform orientation with a pile yarn that has less contamination and eliminates the coating process despite measures against static electricity by conductive fibers. It is for the purpose.
  • the present inventors can obtain a display element with very little orientation failure by using extra fine fibers with a special cross section for a pile of a rubbing cloth, and further heat It has been found that the use of a fusible conjugate fiber makes it possible to omit the ground backing process, and that a rubbing cloth with improved yield can be obtained by using a conductive conjugate fiber in which the conductive layer is not exposed.
  • the present invention has been completed.
  • the present invention is (1) a rubbing cloth used for aligning an alignment film of a liquid crystal display device, the rubbing cloth comprising a ground ground and a pile thread, and the warp of the ground ground
  • a heat-fusible conjugate fiber is used for at least a part of the weft yarn, and the pile yarn is obtained by dividing a multilayer laminated conjugate fiber.
  • a flat ultrafine fiber of 1 ldtex or less, and its flatness ratio A rubbing cloth characterized by being composed of ultrafine fibers with a ratio of major axis / minor axis) of 4 or more!
  • the ground ground contains conductive composite fibers, and the conductive The rubbing cloth according to 1 above, wherein the composite fiber has no conductive layer exposed on the fiber surface, and the conductive performance is 10 5 to 10 9 Q / cm per filament, and (3) the conductivity of the conductive composite fiber.
  • Conductive conjugate fibers with a concealing polymer layer on the outer periphery of the layer are used! /, Wherein (2) rubbing cloth according, there is provided a.
  • FIG. 1 is a cross-sectional view of an example of a multilayer laminated composite fiber used as a flat ultrafine fiber forming component of a pile yarn of a rubbing cloth of the present invention.
  • FIG. 2 is a schematic cross-sectional view showing an example of the configuration of the rubbing cloth of the present invention.
  • FIG. 3 is a schematic cross-sectional view showing an example of a conductive conjugate fiber used in the present invention.
  • FIG. 4 is a schematic cross-sectional view showing a conductive conjugate fiber used in a comparative example of the present invention. Explanation of symbols
  • the rubbing cloth of the present invention has an extra fine fiber force used for the pile of the rubbing cloth.
  • a fiber-forming polymer in the present invention, "polymer” is synonymous with “polymer”
  • Polymer A is a flat ultrafine fiber obtained by dividing a multi-layered split type composite fiber having a special cross-sectional shape, which is an assembly of flat ultrafine fiber forming components composed of an incompatible fiber-forming polymer B After splitting, each becomes a flat ultrafine fiber made of polymer A or polymer B.
  • the flat fiber has a single fiber fineness of 1. ldtex or less is suitable in that a uniform display element without streaks can be obtained, and 0.;! ⁇ 1.
  • the flatness which is the ratio of the major axis / minor axis in the cross section of the flat ultrafine fiber, is required to obtain a fine groove, preferably 5 or more and 15 or less. It is.
  • the pile yarn formed of flat ultrafine fibers fall down it is preferable to arrange the pile yarn so that the long diameter side of the flat surface of the flat ultrafine fibers is parallel to the rubbing direction.
  • a multilayer laminated conjugate fiber as shown in Fig. 1
  • a pile forming yarn made of the same fiber hereinafter also referred to as “pile yarn”
  • pile yarn a low twist yarn having a twist number of 0 to 500 T / M
  • the pile yarn is parallel to the warp yarn.
  • the pile yarn is flattened, and the flat surface (longer diameter side) of the split multi-layer laminated composite fiber tends to be parallel to the weft.
  • the multilayer laminated composite fiber before division is such that 5 to 20 layers, particularly 7 to 15 layers of flat ultrafine fiber-forming components are laminated so that the flat surfaces are in contact with each other.
  • the cross-sectional shape is preferable and the single fiber fineness of the multilayer laminated composite fiber before division is preferably from ! to lOdtex.
  • the multi-layer laminated composite fiber before splitting a cross-sectional shape in which many flat cross-section fiber forming components as described above are in contact with each other in a flat surface is preferable.In particular, the cross-section of each flat ultra fine fiber forming component is almost rectangular. This is preferred in terms of producing fine grooves.
  • the pile has a tota nore fineness of 40 to 500 dtex force S, and if the pile height is 1 ⁇ 0–3. Omm, especially 1 ⁇ 5 to 2.6 ⁇ mm, thenoire force is difficult to reach. , which is preferable in that an alignment film excellent in the life of a selfish person can be obtained.
  • the pile density is preferably such that there are 100,000 to 400,000 piles per lcm 2 of ground fabric.
  • Such flat ultrafine fibers are obtained by multi-spinning by introducing two or more incompatible polymers into the spinneret hole so as to be in a multi-layered state when viewed in the cross section of the fiber and performing composite spinning.
  • the laminated composite fiber is in the fiber state or made into a pile fabric using the fiber, it is treated with stagnation, water jet treatment, air jet treatment, needle treatment, shearing treatment, alkali weight loss treatment, benzoic acid or It can be obtained by splitting with a solvent such as zircanol.
  • the incompatible polymer constituting the split-type composite fiber is a polymer having a solubility parameter different by 2 Mj / m-3 or more.
  • the polymer A polyethylene terephthalate, polybutylene terephthalate or a copolymer polyester mainly composed of these, polylactic acid Poriesutenore etc., nylon 6 as the polymer B, nylon 66, nylon 610, a polyamide, such as semi-aromatic polyamide, or an ethylene Bulle alcohol copolymer of ethylene content from 20 to 50 mole 0/0 as the polymer A, polymer B It is preferable because it is easy to divide! It is formed by combining two or more kinds selected from polyolefins such as polyethylene and polypropylene.
  • the weight ratio of polymer A to polymer B is preferably in the range of 4 ::! To 1: 4, more preferably in the range of 3 ::! To 1: 3.
  • the solubility parameter of the polymer composing the composite fiber here is a list of the polymer parameters described on page 90 of the “Plastic Data Book” (issued December 1, 1999) published by the Industrial Research Council. (SP value table) means! / As shown in the SP value table, the solubility parameter can be determined from the calculated value of the density of cohesive energy.
  • the heat-fusible conjugate fiber used in the present invention is a low melting point component containing a polymer having a melting point of 160 ° C. or lower and 80 ° C. or higher, and a polymer having a higher melting point than the low melting point component.
  • a composite fiber having a composite cross-sectional structure such as a sea-island type or a multi-layer laminate type can be used, and a core-sheath type is particularly preferable.
  • Examples of the polymer that can be used for these heat-fusible composite fibers include polyamides represented by nylon and the like, polyesters, and polyolefin polymers represented by polypropylene and polyethylene.
  • combinations of low melting point components and high melting point components include, for example, low melting point polyester / high melting point polyester, polyethylene / polypropylene, polyethylene / high melting point polyester, polypropylene / polyester. Tell.
  • the heat-fusible conjugate fiber has both heat-fusibility and fiber properties such as strength, elongation, and heat-shrinkability even after fusing. This is very important.
  • the pile thread is preferably a polyester / nylon composite fiber
  • those using polyhexamethylene terephthalate as a low melting point polyester component and using polyethylene terephthalate as a high melting point component are particularly preferable because the texture becomes hard after fusion.
  • the proportion of the low melting point polymer in the heat-fusible conjugate fiber is preferably 20 to 80% by weight.
  • the low-melting-point polymer is less than 20% by weight, it is difficult to obtain good heat-fusibility, and if it exceeds 80% by weight, the fiber forming processability such as spinnability and stretchability is deteriorated. .
  • the single fiber thickness of the heat-fusible composite fiber is 1 to;! Odtex is preferred!
  • all of the fibers constituting the ground may be heat-fusible conjugate fibers, or the heat-fusible conjugate fibers may be used as part of the fibers constituting the lands. It ’s used! When used as a part of the fibers constituting the lands, 40% by weight or more of all the fibers constituting the ground by arranging them at warp and wefts at predetermined intervals are heat-fusible conjugate fibers. It is preferable for preventing the pile yarn from coming off.
  • acrylic emulsion, polyurethane emulsion, rubber emulsion or latex may be back-coated on the dull fabric.
  • a conductive conjugate fiber can be used for the ground.
  • the rubbing process is performed by rubbing the alignment film with a rubbing cloth adhered to a rubbing roller that rotates at high speed, so that friction, contact, and peeling are repeated between the alignment film and the rubbing cloth, and static electricity is generated. In addition, it damages the circuit on the glass substrate and adsorbs various dust generated during rubbing.
  • Patent Document 1 As countermeasures against static electricity, it is described that a rubbing cloth having conductivity imparted to the raised layer (that is, the pile portion) is used. As a specific measure, a conductive fiber is added to the raised layer, or when a fine fiber is spun. It describes that an electric agent (carbon black or metal powder) is kneaded and spun. However, when the conductive fiber contained in the raised layer is not an ultrafine fiber, the raised layer, that is, the pile surface, is a mixture of the conductive fiber and the ultrafine fiber, and naturally between the alignment film. Differences in friction force occur, resulting in rubbing spots.
  • the split ultrafine fiber as, for example, a core-sheath type composite fiber.
  • the fiber is understood to mean an ultrafine fiber in which an antistatic agent is uniformly kneaded. Therefore, in this case, carbon black and metal fine powder are exposed on the surface of the ultrafine fiber. Even if it is assumed that the divided ultrafine fibers are composited, the pile yarn is cut after weaving, so the antistatic agent is exposed on the pile yarn cross section, and the If the alignment film is rubbed with ultrafine fibers from which the electrical agent is exposed, contamination will be caused and the liquid crystal display quality will be reduced.
  • the conductive fibers need not be used for piles.
  • the conductive conjugate fiber include a conjugate fiber in which a conductive layer made of a resin containing conductive carbon (carbon black), which is a general conductive agent used for the fiber, is continuous in the length direction of the fiber. Can be used. Since the neutralization is performed by corona discharge, the electrical resistance of the conductive composite fiber is preferably in the range of 10 5 Q / cm to 10 9 ⁇ / cm. Such conductive carbon black contained in the conductive layer of the conductive composite fibers having an electrical resistance, 10- 2 ⁇ ; having a resistivity of 10 3 Omega 'cm is preferred.
  • the electrical resistance here refers to the electrical resistance at an applied voltage of 1 KV after cutting the fiber to 10 cm, applying a conductive paint (dortite) to the cut surface and fixing the fiber end, and using the end as an electrode. It is the calculated electrical resistance per filament.
  • carbon powder such as acetylene black, ketjen black, PAN-based carbon, pitch-based carbon, ano-remium, palladium, iron, copper, silver, etc. are used as the conductive carbon (carbon black).
  • Metal powder and fiber, zinc oxide, oxidized There are metal compound powders such as titanium oxide, copper sulfide, and zinc sulfide, and these can be used alone or in combination of two or more.
  • the electrical conduction mechanism of the conductive carbon black-containing resin is considered to be due to the contact of the carbon black chain, due to the tunnel effect, or the like. It is considered the Lord. Therefore, the longer the carbon chain, and the higher the density of the carbon chain present in the resin, the higher the contact probability and the higher conductivity. As a result of the study by the present inventors, the conductive effect is almost insufficient when the conductive carbon black content is less than 15% by weight, and the conductivity is rapidly improved when the content is 20% by weight, and the conductive effect is almost saturated when the content exceeds 30% by weight. To reach.
  • the conductive layer of the conductive composite fiber is composed of a conductive material such as conductive carbon black and a fiber-forming polymer.
  • FIG. 3 shows an example of a cross section of a conductive conjugate fiber including a conductive layer.
  • the conductive layer 31 is not exposed on the fiber surface (fiber side surface), that is, the conductive layer 31 is a concealing polymer as a multi-layer nonconductive polymer layer. Covered by layer 32 and protective polymer layer 33, the conductive layer is not exposed on the side of the fiber, it is a sheath-core type conductive composite fiber, and it is non-exposed to avoid the problem of contamination on the alignment film Type.
  • the thickness of the conductive conjugate fiber used in the rubbing cloth of the present invention is preferably in the range of single fiber fineness of 5 to 2 Odtex, particularly 7 to 18 dtex.
  • a white (gray-white) concealing polymer layer covering the conductive layer in order to conceal the black color of the conductive layer such as carbon black from the viewpoint of aesthetics. It is preferable in view of the appearance of the conductive conjugate fiber.
  • the concealing polymer layer contains inorganic fine particles in a fiber-forming polymer. Examples of the inorganic fine particles include titanium dioxide, zinc oxide, magnesium oxide, aluminum oxide, silicon dioxide, barium sulfate, carbonated potassium, sodium carbonate.
  • Titanium dioxide and / or zinc oxide is preferred in consideration of the concealment effect, whiteness as a fabric, yarn production, and processing characteristics.
  • the fiber-forming polymer that forms the concealing polymer layer If the inorganic fine particles are contained in an amount of about 10 to 50% by weight and the thickness of the concealing polymer layer is adjusted, the concealing effect can be obtained.
  • the fiber-forming polymer those mentioned later as polymers for forming a sheath layer can be used.
  • the concealing polymer layer is further coated with a fiber-forming polymer (polymer) to provide a protective polymer layer.
  • a fiber-forming polymer polymer
  • the polymer forming the protective polymer layer include polyamides represented by nylon and the like, polyesters, and polyolefin polymers represented by polypropylene and polyethylene.
  • the function of the protective polymer layer is to further protect the conductive layer and the concealing layer, to woven into a velvet fabric, etc. as a conductive composite fiber, and to develop fiber strength as the ground yarn of the rubbing fabric, the black color of the conductive layer, etc. For further concealment.
  • the protective polymer layer becomes the outermost surface of the fiber, it is preferable to add titanium dioxide or the like used for ordinary synthetic fibers to the forming polymer to enhance the texture of the fiber.
  • various additives such as a heat stabilizer, a light stabilizer, and an antistatic agent that are usually used for adding fibers, a color pigment, and the like can be appropriately added to the concealing polymer layer and the protective polymer layer as necessary.
  • the composite ratio in the fiber cross section is set to the maximum thickness of each of the conductive polymer layer 31, the concealing polymer layer 32, and the protective polymer layer 33.
  • the ratio of the conductive polymer layer 31 to 1 is 0.1: 1 to; 1: 0.5 to 2 in terms of conductivity, concealment, surface protection and fiber performance. It is preferable from the balance.
  • an exposed type conductive composite fiber is shown in Fig. 4.
  • the conductive composite fiber 40 shown in the figure includes a conductive layer 31 and a protective layer 41, and the conductive layer 31 is exposed at a part of the side surface of the fiber.
  • an exposed type conductive composite fiber is used, there is a risk of contamination of the conductive agent due to friction caused by a rubbing roll rotating at high speed.
  • the conductive conjugate fiber is used as a part of a ground yarn that is not used as a pile yarn.
  • contamination is considered in consideration of friction caused by a labinda roll that rotates at high speed.
  • the non-exposed sheath-core type conductive composite fiber as shown in Fig. 3 is used.
  • the conductive conjugate fiber is not subjected to tension as much as possible as a covering yarn in which the conductive conjugate fiber is wound around the non-conductive yarn.
  • the conductive conjugate fiber is used in at least the longitudinal direction or the weft direction of the ground texture.
  • the yarn containing the conductive conjugate fiber is bundled into a bundle (hereinafter, sometimes referred to as “conductive yarn”), and the distance between lcm and 5 cm of the ground is more preferable. It is used with about 1 lcm to 4 cm.
  • Weaving into the ground structure can be performed using conductive yarns made of only conductive composite fibers, or can be integrated with other reinforcing fibers using means such as interlacing. As described above, it may be a covering yarn. It is convenient to weave in the warp direction or the weft direction at a rate of one conductive thread between lcm and 5cm.
  • the weaving interval of the conductive yarn is less than 1 cm, the conductive composite fiber is expensive, so that the cost is high and the static elimination performance is not particularly improved. On the other hand, when the weaving interval is 5 cm or more, a sufficient static elimination effect cannot be obtained.
  • the ground ground has a weave density of 15 to 40 warps / cm and 20 to 50 wefts / cm.
  • the thickness of the warp and weft is preferably in the range of 50 to 300 dtex.
  • FIG. 2 shows an enlarged schematic sectional view of a rubbing cloth 10 according to an embodiment of the present invention.
  • the rubbing cloth 10 is a pile cloth material made up of a pile 21 and a ground material 22, and a part of the ground material 22 is thermally fused to at least one of the conductive composite fiber 23 and at least! Wearable conjugate fiber is woven.
  • the pile yarn is a flat ultrafine fiber made of a multi-layered laminated fiber having a flatness of not less than 1. ldtex and a flatness force after splitting, preferably 5 or more. 1. Thickness exceeding ldtex has a large effect on the alignment film of the liquid crystal display element during the rubbing process, and the pile length and tilt angle are problematic, and it is difficult to obtain a uniform alignment effect.
  • As the pile fabric material velvet, moquette and the like are suitable.
  • the ground yarn is disposed at least in the warp direction or part of the weft direction, and at least a heat-sealable composite fiber is used for the warp or weft.
  • the materials used can be used.
  • the ground yarn is cubra, there is a dimensional change due to humidity change, so strict humidity control is required for storage, precision cutting, and sticking to the rubbing tape. Since the required temperature and humidity control is easy, dimensional stability against temperature and humidity and polyester fiber are particularly suitable.
  • the pile yarn of the rubbing cloth of the present invention has a special cross section made of flat ultrafine fibers, uniform and stable rubbing treatment can be performed. According to this rubbing cloth, it is easy to handle, and it is possible to generate uniform and fine grooves in the alignment film without the need to strictly manage the pile length and the inclination angle as in the past.
  • the rubbing cloth of the present invention has conductive composite fibers arranged in a part of the ground structure, static electricity due to repeated friction, contact, and peeling between the alignment film and the rubbing cloth that occurs during rubbing is prevented. Static electricity can be eliminated by corona discharge, reducing damage to the circuits provided in the alignment film and reducing dust adsorption caused by rubbing.
  • the flatness referred to in the present invention is a mean value obtained by taking a photomicrograph of a cross section of a fiber and enlarging it to obtain the ratio of the long side to the short side for each of 50 arbitrarily selected fibers.
  • the ground weave density is warp and weft 70 / inch (28 / cm) and 69 / inch (27 / cm) velvet fabrics were center-cut and scraped.
  • Polyester of polymer layer and nylon of layer B alternately laminated in 11 layers of multi-layered laminates in the transverse direction. (84 dtex / 24 filament) was used as a flat extra fine fiber forming pile yarn, which was driven in parallel with the warp.
  • Conductive composite fiber yarn of 28dtex / 2 filament obtained by composite spinning and drawing with a three-layer core-sheath type composite cross section consisting of a protective polymer layer (electric resistance 3 X 10 7 Q / cm 'f) At the back of the loom at a rate of 1 ⁇ 27 cm The yarn is woven into the warp.
  • a polyhexamethylene terephthalate with a melting point of 135 ° C is used as a low melting sheath component, and polyester is a high melting core component. , Twisted number S500T / M).
  • the pile of the obtained rubbing cloth is composed of ultrafine fibers having a fineness of 0.3 dtex and a flatness of 6, the pile length is 2 mm, and the flat ultrafine fibers are in contact with the dividing surface. Existed. In addition, 250,000 flat ultra-thin pile fibers existed per lcm 2 of ground fabric.
  • a multifilament yarn (84 dtex / 24 filament) consisting of a composite fiber consisting of 12 layers of polyester / nylon laminated alternately was used as the pile yarn.
  • the conductive conjugate fiber is not woven into the ground, and the heat-fusible conjugate fiber is not used. Instead, regular polyester fiber (84 dtex / 72 filament, twist S800T / M) is used as the warp and Weft was used for weaving, then shearing was performed, defatting and scouring were performed, and the pile yarn was divided by an alkali weight reduction process using an aqueous sodium hydroxide solution with a target weight loss of 7%. Further, after brushing and drying, back coating was performed with acrylic emulsions to obtain a rubbing cloth.
  • the fiber constituting the pile was an ultrafine fiber of 0.27 dtex, but the average flatness was 1.8.
  • nylon 6 containing conductive carbon black is used as conductive layer 31
  • nylon 6 is also used as protective polymer layer 41, and conductive layer 31 is partially exposed on the fiber surface.
  • exposed 28dtex / 2 filament conductive composite Fiber 40 electric resistance 2 X 10 7 Q / cm 'f
  • ultra-fine divided fiber with the same radial cross section as in Comparative Example 1 were mixed and used for pile yarn at a rate of 1. Produced a rubbing cloth in the same manner as in Comparative Example 1.
  • the conductive composite fiber used for the pile was thick as 28 dtex / 2 filament, so scratches occurred, and the conductive composite fiber exposed on the surface of the conductive composite fiber by high-speed rotation. Conductive carbon black dropped from the layer and contamination occurred. The alignment performance deteriorated due to the influence of the cleaning process for removing this, and the quality of the liquid crystal display device deteriorated.
  • the rubbing cloth of the present invention can be used for a uniform and stable rubbing treatment for forming uniform and fine grooves in the alignment film.
  • the rubbing cloth of the present invention uses heat-fusible conjugate fibers at least for the warp or weft, the back coating for preventing the pile yarn from falling off can be omitted, and the rubbing that can improve the yield at low cost. Available for processing.
  • the rubbing cloth of the present invention in which conductive composite fibers are arranged on a part of the ground structure eliminates static electricity due to repeated friction, contact, and peeling between the alignment film and the rubbing cloth generated during rubbing by corona discharge and It can be used for rubbing treatment that can reduce damage to the circuit provided on the membrane and reduce the adsorption of dust generated by rubbing.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Nonlinear Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nanotechnology (AREA)
  • Woven Fabrics (AREA)
  • Liquid Crystal (AREA)

Abstract

L'invention concerne un tissu de frottement destiné à être utilisé dans un traitement d'alignement d'un film d'alignement d'un appareil d'affichage à cristaux liquides. Ledit tissu est caractérisé en ce qu'il consiste en un tissu de base et des fils de poil ; en ce qu'une fibre composite thermofusible est utilisée dans au moins certains des fils de chaîne et de trame du tissu de base ; et en ce que les fils de poil consistent en fibres ultrafines plates de 1,1 dtex ou moins obtenues par division d'une fibre conjuguée laminée multicouches, où le caractère plat (rapport axe majeur/axe mineur) est de 4 ou plus. En conséquence, l'invention concerne un tissu de frottement facile à manipuler et pouvant former des canaux fins uniformes sur le film d'alignement pour appareil d'affichage à cristaux liquides.
PCT/JP2007/071228 2006-11-07 2007-10-31 Tissu de frottement WO2008056584A1 (fr)

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KR1020097008404A KR101494018B1 (ko) 2006-11-07 2007-10-31 러빙 천
JP2008543042A JP5009300B2 (ja) 2006-11-07 2007-10-31 ラビング布

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009294609A (ja) * 2008-06-09 2009-12-17 Fujifilm Corp ラビング処理方法
JP2009294608A (ja) * 2008-06-09 2009-12-17 Fujifilm Corp ラビング用布材
JP2011058151A (ja) * 2009-09-14 2011-03-24 Aono Pile Kk パイル織物およびその製造方法、ならびにパイル織物製造装置
CN102517745A (zh) * 2011-11-28 2012-06-27 江苏阳光股份有限公司 500支纯毛精纺花呢及其制备方法

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Publication number Priority date Publication date Assignee Title
TWI384100B (zh) * 2010-01-25 2013-02-01 Tai Yuen Textile Co Ltd 配向布及配向裝置
CN102243393B (zh) * 2010-05-14 2013-10-16 台元纺织股份有限公司 配向装置及方法
CN102251333B (zh) * 2010-05-17 2013-07-10 台元纺织股份有限公司 配向布及配向装置
CN103472625B (zh) * 2013-08-30 2016-05-04 合肥京东方光电科技有限公司 一种摩擦布、其制备方法及制备装置
CN103558715B (zh) * 2013-11-12 2016-04-06 北京京东方光电科技有限公司 摩擦布及摩擦装置
CN105589258A (zh) * 2014-10-23 2016-05-18 杉原恭卫 Lcd制造用摩擦布
CN105807501B (zh) * 2016-06-03 2018-07-06 京东方科技集团股份有限公司 摩擦布及其制备方法、摩擦辊、摩擦辊的压力检测方法
CN111304824A (zh) * 2020-03-20 2020-06-19 李宁（中国）体育用品有限公司 一种织带的制备方法、织带及其应用

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JPH03163528A (ja) * 1989-11-22 1991-07-15 Toray Ind Inc 液晶素子製造用ラビング布帛および液晶素子の製造方法
WO2001061083A1 (fr) * 2000-02-21 2001-08-23 Kanebo, Limited Fibre a section transversale modifiee et son procede de production

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JP2005091899A (ja) 2003-09-18 2005-04-07 Kanebo Ltd ラビングクロス
JP2007232938A (ja) 2006-02-28 2007-09-13 Gurabitei:Kk ラビング布

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JPH03163528A (ja) * 1989-11-22 1991-07-15 Toray Ind Inc 液晶素子製造用ラビング布帛および液晶素子の製造方法
WO2001061083A1 (fr) * 2000-02-21 2001-08-23 Kanebo, Limited Fibre a section transversale modifiee et son procede de production

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009294609A (ja) * 2008-06-09 2009-12-17 Fujifilm Corp ラビング処理方法
JP2009294608A (ja) * 2008-06-09 2009-12-17 Fujifilm Corp ラビング用布材
JP2011058151A (ja) * 2009-09-14 2011-03-24 Aono Pile Kk パイル織物およびその製造方法、ならびにパイル織物製造装置
CN102517745A (zh) * 2011-11-28 2012-06-27 江苏阳光股份有限公司 500支纯毛精纺花呢及其制备方法

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KR101494018B1 (ko) 2015-02-16
JP5009300B2 (ja) 2012-08-22
CN101611344A (zh) 2009-12-23
KR20090079210A (ko) 2009-07-21
TW200827503A (en) 2008-07-01
JPWO2008056584A1 (ja) 2010-02-25

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