KR20020036656A - Fabric for Rubbing - Google Patents

Abstract

PURPOSE: To provide a rubbing cloth which can respond as required to an increased size of the substrate of a liquid crystal display device. CONSTITUTION: The rubbing cloth is processed in such a manner that a great number of pile threads 3 woven along the warp direction of the base structure consisting of wefts 1 and warps 2 are held as inclined in the warp direction. Thus, the rubbing cloth can be cut along the warp direction and attached to a rotation roller for rubbing so that the cloth can respond to an increased size of the substrate of a liquid crystal display device without increasing the width of the cloth.

Description

Fabric for Rubbing {Fabric for Rubbing}

The present invention relates to a rubbing cloth used in a liquid crystal display device manufacturing process.

Liquid crystal display devices are widely used for image display in various devices such as televisions and notebook computers. In order to control the orientation of the liquid crystal molecule which forms the basic stem of the display element to a predetermined direction, the rubbing process is conventionally performed in a manufacturing process. Rubbing is a processing method which orientates a liquid crystal molecule in the direction by rubbing the surface of the alignment film which consists of polyimide resin etc. formed on the board | substrate which clamps a liquid crystal in a fixed direction. As a member of such a rubbing process, the pile material of a pile paper is used.

The pile material of the pile paper is a structure in which a cut pile 3 having a pile length of 1.5 to 3 mm is woven in a diagonal direction to a fabric structure consisting of a warp yarn 1 and a weft yarn 2, as shown in FIGS. 5 and 6. The wrapping material of the pile paper is wound around the outer circumference of the rotary roller and rotated to contact the substrate surface. Since the cut pile is raised, minute rubbing traces in a predetermined direction are formed on the alignment film on the substrate surface. 5 is cut when the cut pile is W-shaped and is mainly used when weaving long filament yarn. 6 is cut when the V-shaped cut file is woven, and is mainly used when weaving yarns.

When the rubbing treatment is performed using such pile paper, various countermeasures have been adopted because the uneven rubbing treatment tends to cause display unevenness. For example, Japanese Unexamined Patent Application Publication No. 11-237636 raises the pile tip of the wrapping material of the pile paper to be rubbed so that it is located behind the hair root. That is, the piles are raised in a direction that is inclined in advance along the rubbing process so that the piles move in a constant direction between rubbing treatments and rub with each other on the surface of the substrate, and the parallel direction of the piles of the rotary rollers are wound. The point which is set to incline with respect to a rotation direction, etc. are described, and in this way, the nonuniformity of a rubbing process is aimed at. In addition, Japanese Patent Application No. 3083020 discloses that a cut file made of viscose rayon filament is inclined at a predetermined angle in the inclined direction of the fabric structure so that the fine wrinkle structure of the viscose rayon filament is in contact with the substrate surface. It is described that it is possible to form finer grooves.

In recent years, the size of liquid crystal displays has increased, and the liquid crystal panels used for televisions are particularly prominent. In the above-mentioned conventional technique, the rubbing treatment is performed by winding the wrapping material of the pile paper on the rotating roller and making contact with the surface of the substrate while rotating the rotating roller. For example, when a TV is enlarged from 76.2 cm (30 inches) to 152.4 cm (60 inches) The fabric width of the fabric used for the rubbing treatment is required to be twice as conventional. The method of using a plurality of conventional fabric widths or the method of spirally winding a tape-like pile of paper cut to a width of 5.08 to 7.62 cm (2 to 3 inches) may be considered, but unevenness of rubbing treatment occurs at the boundary. There is a drawback.

In the case of manufacturing a fabric material of such a large fabric width in a conventional manner, it is difficult to apply a tension in the width direction (weft direction) uniformly during the manufacturing process, so that various disadvantages occur. For example, in the cutting step of adjusting the length of the pile yarn by cutting, the file length becomes nonuniform because the tension is different at the center portion and the end portion in the width direction. In addition, even in the process of raising pile yarns, if the tension becomes uneven, the pile paper becomes loose and thus cannot be treated uniformly. The damage caused by the nonuniformity of tension as described above is remarkable as the inclination and weft of the fabric tissue becomes thinner. It is conceivable to make the warp and the weft thicker to reduce the tension, but it is difficult to adjust the density, the inclination angle and the like per unit area of the pile yarn.

In the conventional manufacturing process, pile yarns are raised in the inclined direction as described in Japanese Patent Application Laid-Open No. 11-237636 and Japanese Utility Model No. 3082820. However, such raising in the inclined direction tends to cause a bunch in structure of the tissue. Specifically, Fig. 7 (a) shows a straight tissue before cutting the pile yarn and is a straight tissue in which the pile yarn 3 is woven between two upper and lower fabric tissues woven by the warp yarn 1 and the weft yarn 2. have. As shown in Fig. 7B, two pile papers are formed by cutting the pile yarn between the fabric structures in the oblique direction. When this cutting is performed, first, the pile yarn 3 is stretched in the inclined direction, and as shown in Fig. 7 (b), the portions 4 and 5 protruding from the far-end structure of one pile yarn are inclined in the inclined direction. And the protrusion 4 is inclined as if standing, and the protrusion 5 is inclined as if lying down. In the relationship with the weft yarn, one side is wound like the weft yarn as 4, but the other side is inclined to some extent to the adjacent weft yarn like 5 to some extent. In the raising process, a force is applied to incline the pile yarn in the inclined direction, and another inclined state of the protruding portions 4 and 5 is encouraged, and the height protruding from the fabric texture of the protruding portions 4 and 5 tends to be uneven. It is. In addition, although FIG. 8 is the figure which looked at the pile yarn of FIG. 5 from the upper surface, As is evident from this figure, the pile yarn is woven in the direction which intersects at predetermined angle (theta), not parallel to the diagonal direction in the structure. Therefore, it can be understood that when the brushing step is performed in the inclined direction, a force is applied to twist the pile yarn, and the pile yarn is difficult to be inclined squarely in the inclined direction.

Accordingly, it is an object of the present invention to provide a rubbing cloth which can solve the above problems and can respond in a temporary response to the enlargement of the liquid crystal display device.

1 is a view of the rubbing cloth according to the present invention seen in the weft direction and the inclined direction of the fabric tissue.

It is explanatory drawing at the time of cut | disconnecting and using the rubbing cloth which concerns on this invention.

It is explanatory drawing of the manufacturing process of the rubbing cloth material which concerns on this invention.

It is explanatory drawing of the rotating roller and the rotating belt used at the raising process of the manufacturing process of FIG.

It is a schematic diagram of the W-shaped straight structure of the rubbing cloth.

It is a schematic diagram of the V-shaped straight structure of the rubbing cloth.

It is explanatory drawing about the cutting | disconnection of the pile yarn of a rubbing cloth.

8 is an explanatory view of the relationship between the incorporated pile yarn and the inclination direction.

<Description of the code>

1: warp of fabric tissue, 2: weft of fabric tissue

3: pile yarn, 4, 5: protrusion of pile yarn

10: woven fabric, 20: shearing process

30: steam process, 40: predrying process

50: resin immersion step, 60: washing step

70: brushing treatment process, 71: rolling roller

72: rotating belt, 80: heat treatment process

In the rubbing fabric according to the present invention, in the rubbing fabric consisting of a plurality of pile yarns having a fabric structure woven by the inclined and weft yarns, and woven in the oblique direction to the fabric tissue and protruding from the fabric tissue, the The protrusion of the pile yarn is characterized in that it is processed in a form stable so as to remain inclined in the weft direction of the fabric tissue.

In addition, the inclination angle of the protruding portion of the pile yarn is characterized in that the range of 26 degrees to 40 degrees with respect to the vertical line set on the far-end tissue.

In addition, the shape stabilization processing is characterized by including a process for raising the pile yarn in the weft direction.

Moreover, the said shape stabilization process is characterized by including the process of resin-processing the protrusion part of the said pile yarn.

In addition, as the warp and the weft yarn is characterized in that the long fiber yarn having a fineness of 33 to 167 decitex.

In addition, as the warp and the weft yarn is characterized in that the yarn number of yarn number 140 to twin yarn number 10 is used.

In addition, the weft yarn is characterized in that the yarn thicker than the inclination.

By having such a structure, it becomes possible to cope with the enlargement of a liquid crystal display element, without increasing the far-end width. That is, in the past, since the pile yarn was inclined in the inclined direction, it was necessary to take the width of the fabric corresponding to the width of the substrate subjected to the rubbing treatment. However, since the rubbing cloth according to the present invention is kept in an inclined state in the weft direction, In the case of winding the rotating roller, the wrapping material may be cut in the inclined direction by a length corresponding to the width of the substrate subjected to the rubbing treatment. 2 illustrates a case of cutting and using a conventional wrapping material in which the rubbing cloth and pile yarn of the present invention are inclined in an inclined direction. As shown in Fig. 2 (a), the rubbing cloth according to the present invention is a conventional yarn as shown in Fig. 2 (b) when the pile yarn is inclined in the weft direction and takes the length (d) in the oblique direction and cuts in the weft direction. It is sufficient only to increase the length (d) in order not only to obtain the same shape as that but also to increase the size of the substrate of the liquid crystal display element. Therefore, it is possible to respond to the size of the substrate in a temporary response without increasing the fabric width.

Further, as shown in FIG. 1, the pile yarn is inclined in the weft direction, so that structural problems in the case of inclining in the inclined direction as described in FIG. 7 can be overcome. That is, as shown in Fig. 1 (a), the portions 4 and 5 protruding from the original fabric of the pile yarn are kept in an inclined state so as to be wound on both sides in the same inclination, and structurally inclined in the inclined direction. I knew there was an advantage. Therefore, when raising in the weft direction, the raising of both protrusions can be performed in a similar inclined state. In this case, as shown in Fig. 1 (a), when the inclination angle δ of the protrusions 4 and 5 of the pile yarn is in the range of 26 to 40 degrees with respect to the vertical line in which the far-end structure is flat, the rubbing treatment is better. can do.

And in order to keep the protrusion part of a pile yarn in the state which inclined in the weft direction, it becomes possible by carrying out the raising process of the weft direction in the process of the raising process as a shape stabilization process. Moreover, the inclined state can be maintained more stably by resin-processing the protrusion part of a pile yarn.

Further, by using a long-fiber yarn having a fineness of 33 to 167 decitex or a spun yarn having a double yarn number of 140 to a single yarn 10 number as a warp and weft of the fabric structure, a better one can be obtained as a rubbing cloth. By setting the weft to be thicker than the warp, the warp of the weft is less in the state of weaving the warp and weft, so the crimp of the pile yarn is increased, so that the crimp balance is improved and the protrusions of the pile yarn stand more evenly. The inclined state can be made more stable.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail.

As the fabric texture of the rubbing cloth according to the present invention, recycled fibers represented by rayon, natural fibers represented by cotton, semisynthetic fibers such as acetate, polyester-based synthetic fibers represented by polyethylene terephthalate, and aliphatic polyamides represented by nylon Thin synthetic or woven fabrics using these synthetic fibers can be employed. The textile structure may be any one capable of weaving pile yarns, and is not particularly limited.

It is preferable that the warp yarn and the weft yarn used for the fabric tissue have a length in the range of 33 to 167 decitex (30 to 150 denier) in the case of long fiber yarn, and long fibers in the range of 56 to 660 decitex (50 to 600 denier) as the pile yarn. It is good to use four. As long fiber yarn, a viscose rayon yarn and a cupplus yarn are used, for example.

In the case of the spun yarn, it is preferable that the number of cotton yarns is 140 yarns to 10 yarn yarns as the yarn and weft yarn, and the number of cotton yarns 100 yarns to 10 yarn yarns may be used as the pile yarn. For example, cotton yarns are used as the yarn.

In addition, it is easier to make the weft yarn thicker than the warp so as to prepare the inclined state of the pile yarn in the weft direction.

The manufacturing process of the rubbing cloth which concerns on FIG. 3 at this invention is shown. First of all, although not shown, as in the prior art, the fabric tissue is fabricated using the warp and weft yarn made of the fibers as described above, and as shown in FIG. The woven fabric 10 thus formed cuts the leading end of the cut pile in the shearing step 20 and adjusts the height of the cut pile. In the steam process 30, the wrinkles of the woven fabric 10 are steamed using a roller, and then the oil, glue, and the like attached to the yarn are washed in the washing process 40 and dried sufficiently in the predrying process 50.

Next, in the resin immersion step 60, the woven fabric 10 is immersed in the tank in which the liquid synthetic resin is put, and the woven fabric 10 is sufficiently impregnated with the synthetic resin. As the synthetic resin, one selected from cellulose reactive thermosetting resins, thermocondensation thermosetting resins, polymer type polyester resins, polyamide resins or polyethylene resins, which is appropriately selected and mixed according to the purpose is used. The woven fabric 10 impregnated with synthetic resin is first brushed in the inclined direction in the brushing treatment step 70 and then brushed in the weft direction. The raising in the warp direction and the weft direction can be appropriately combined according to the characteristics of the pile yarn, the degree of inclination, the degree of opening, and the like, but finally, the raising in the weft direction is necessary. As a degree of inclination, it is preferable to make a fabric structure into a plane, and to make it the inclination angle of 26 degrees-40 degrees with respect to the perpendicular | vertical line standing thereon. As shown in Fig. 4 (a), the raising treatment in the oblique direction uses a rotary roller 71 provided with a plurality of stainless wires formed in the shape of needles on the surface. In addition, the raising process of the weft direction uses the rotating belt 72 which provided the surface of many stainless wires formed in the shape of a needle. In all of the above, the stainless wire is installed at an angle of 75 to 85 degrees with respect to the surface with a wire diameter of 180 μm, and the stainless wire rotates like a stroke of the pile yarn. As shown in Fig. 4B, the rotary roller 71 rotates the stainless wire to incline the pile yarn in the traveling direction (tilt direction) of the woven fabric, and the stainless steel wire is inclined in the inclined direction and opened at the same time. . In addition, as shown in Fig. 4 (c), the rotating belt 72 operates so that the stainless wire travels in a direction (weft direction) that is substantially orthogonal to the traveling direction of the woven fabric, and the pile yarn is inclined in the weft direction by the stainless wire. It is opened.

The woven fabric in which the pile yarn is inclined in the weft direction is stabilized in the form of the pile yarn in the heat treatment step 80. In particular, since the pile yarn is impregnated with a cellulose reactive thermosetting resin, the state in which the glyoxal resin reacts and hardens with heat and is inclined is maintained.

As a form stability process, when synthetic fiber, such as polyester, is used for pile yarns other than the resin mentioned above, dry heat set processing etc. may be used, and it will not specifically limit, if it is a process in which the inclination state of a pile yarn is maintained.

<Example>

Example 1 Inclined Density 24 / A fabric texture woven in plain weave was used at 37 cm / cm weft density. Long pile yarns of 133 decitex (120 denier) made of viscose rayon fibers were used as pile yarns, and the fabrics were woven into W-shaped fabrics shown in Fig. 5 by a known weaving machine so that the yarn density was 24 pieces / cm. The number of pile yarns of the formed woven fabric was 600 pieces / cm <^2> per unit area. The woven fabric thus obtained was treated by the manufacturing process shown in FIG. 3. The woven fabric which fully impregnated the synthetic resin was brushed 10 times in the warp direction and 10 times in the weft direction, and heat-treated with a heat fixer at a temperature of 140 to 160 ° C for 3 minutes.

Example 2: 27 warp densities using 133 decitex (120 denier) long fiber yarns made of cuplar fibers as warp yarns and 84 decitex (75 denier) long fiber yarns made of cuplar fiber as weft yarns A fabric texture woven in plain weave was used at / cm, weft density 49 pieces / cm. As a pile yarn, 110 decitex (100 denier) long fiber yarn made of viscose rayon fibers was used, and it was woven into a fabric structure in a W-shape shown in FIG. 5 by a known weaving machine so that the yarn density was 27 pieces / cm. The number of pile yarns of the formed woven fabric was 870 pieces / cm ² per unit area. The raising process and the resin processing process were performed similarly to Example 1.

Example 3: As the warp and weft yarns, cotton yarns made of cotton fibers were used as yarns of cotton weave density of 17 yarns / cm and weft density 32 yarns / cm. As a pile yarn, cotton yarns made of cotton fibers were spun into a fabric of V-shape shown in FIG. The number of pile yarns of the formed woven fabric was 270 pieces / cm ² per unit area. The raising process and the resin processing process were performed similarly to Example 1.

Example 4: 24 warp densities using 110 decitex (100 denier) long fiber yarns made of cupper fiber as warp yarns and 133 decitex (120 denier) long fiber yarns made of cupper fiber as wefts A fabric texture woven in plain weave with / cm, weft density 37 / cm was used. Long pile yarns of 133 decitex (120 denier) made of viscose rayon fibers were used as pile yarns, and the fabrics were W-shaped as shown in Fig. 5 by a known weaving machine so as to have a yarn density of 24 pieces / cm. The number of pile yarns of the formed woven fabric was 600 pieces / cm <^2> per unit area. The raising process and the resin processing process were performed similarly to Example 1.

The manufactured fabric is, for example, a conventional rubbing fabric in which a pile yarn is inclined in an inclined direction, as compared with that of a fabric width (124 cm) corresponding to a size of 127 cm (50 inches) of a television, as described in FIG. For example, from 91.44 cm (36 inch) fabric width (92 cm) to 127 cm (50 inch) size, the filing yarn opening effect is improved by 5% and the crimp balance is improved. The elastic recovery was also improved by about 5% (elastic recovery was examined depending on how much recovery was performed after applying a pressure of 100 g / cm ² to the pile yarn for 1 hour under constant conditions of temperature and humidity). In addition, the nonuniformity of the total thickness of the cloth can be suppressed to about ± 0.03 mm in the direction of the fabric width, and a good result can be obtained as compared with the inclination of the pile yarn in the conventional inclined direction. Moreover, in Example 4, since the weft was thickened compared with the inclination, it was confirmed that the crimp of the pile yarn was increased, and as a result, the crimp balance was further improved.

As apparent from the above description, the present invention is to keep the pile yarn inclined in the weft direction, so that the size of the liquid crystal display element can be easily responded without increasing the fabric width, and the pile yarn is in the weft direction. Since the pile yarn is wound in the same inclination by being inclined, the structural problem that is likely to occur when the inclined direction is inclined can be avoided.

Moreover, the raising of the weft direction and carrying out the resin process can maintain the inclined state of the weft direction of the pile yarn, and there is no need to provide a new production facility.

In addition, by making the weft thicker than the warp of the fabric structure, it is possible to improve the crimp balance of the pile yarn and to stabilize the warp in the weft direction more.

Claims (7)

A rubbing fabric comprising a plurality of pile yarns having a fabric structure woven by warp and weft yarns and protrusions protruding from the fabric tissue woven in a warp direction to the fabric tissue, wherein the protrusions of the pile yarns are in the weft direction of the fabric tissue. Rubbing fabric, characterized in that the form stable processing to be maintained in an inclined state. The rubbing cloth according to claim 1, wherein an inclination angle of the protrusion of the pile yarn is in a range of 26 degrees to 40 degrees with respect to a vertical line standing on the fabric tissue. The rubbing cloth according to claim 1 or 2, wherein the shape stabilization includes a process of raising the protrusion of the pile yarn in the weft direction. The rubbing cloth according to any one of claims 1 to 3, wherein the shape stabilization process includes a process of resin processing a protrusion of the pile yarn. The rubbing cloth according to any one of claims 1 to 4, wherein a long fiber yarn having a fineness of 33 to 167 decitex is used as the warp and weft yarns. The rubbing cloth according to any one of claims 1 to 4, wherein a cotton yarn having a double yarn number of 140 yarns and a single yarn number of 10 yarns is used as the warp and weft yarns. The rubbing fabric according to any one of claims 1 to 6, wherein the weft yarn is made of a yarn thicker than the warp yarn.