KR20110048900A - Shearing system of rubbing cloth and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A rubbing cloth shearing system and a method for manufacturing rubbing cloth are provided to effectively remove foreign material and to enhance productivity. CONSTITUTION: A rubbing cloth shearing system comprises: a shearing unit(50) for shearing pile yarn of rubbing fabric(10a); a foreign material removing unit for removing foreign materials(13a) from the pile yarn. The foreign material removing unit comprises a foreign material separation unit(110) for separating foreign materials from the pile yarn; and an inhaling unit(120) for inhaling foreign materials. A method for manufacturing the rubbing cloth comprises: a step of shearing the rubbing fabric; a step of removing the foreign materials from the pile yarn; and a step of inhaling foreign materials.

Description

Shearing System of Rubbing Cloth and Manufacturing Method

The present invention relates to a rubbing cloth whole system and a manufacturing method thereof, and more particularly, to manufacturing a rubbing cloth whole system and a rubbing cloth which can effectively remove the remaining foreign matter of the rubbing cloth used for manufacturing electronic devices such as liquid crystal display devices. It is about a method.

In general, a rubbing cloth is used for a rubbing process that rubs the surface of an LCD (liquid crystal display) substrate to control the orientation of liquid crystal molecules, or for rubbing surfaces such as electronic components such as LCD optical films. It is a fiber material. The rubbing cloth may also be used for applications such as fiber cloth for organic photoconducting cartridge or organic photoconductor drum cleaner.

The liquid crystal display has characteristics such as low voltage driving, low power consumption, full color, light weight and small size, and has been applied to a variety of applications such as watches, calculators, PC monitors, notebook computers, aviation monitors, personal portable terminals, and the like.

Such a liquid crystal display device is largely divided into a liquid crystal display panel for displaying an image and a circuit unit for driving the liquid crystal display panel.

Herein, the liquid crystal display panel includes a TFT substrate on which a thin film transistor (TFT) array is formed and a color filter substrate on which a color filter array is formed (hereinafter abbreviated as CF substrate) are arranged at minute intervals in parallel with each other. The liquid crystal is injected or dropped in between.

A patterned ITO electrode is formed on the surface of the TFT substrate as a pixel electrode, an alignment film is coated on the surface of the ITO electrode, and the alignment film comes into contact with the liquid crystal.

An ITO electrode is positioned as a common electrode on the surface of the CF substrate, and the alignment film is coated on the surface of the ITO electrode like the TFT substrate. These TFT substrates and CF substrates are arranged so that the alignment films face each other, and the alignment films of both substrates come into contact with the liquid crystal.

On the other hand, the manufacturing process of the liquid crystal display device configured as described above is an array process for forming a switching element such as a wiring pattern, a thin film transistor, etc. on a glass substrate, an alignment process or a spacer arrangement and between the substrates facing each other It is manufactured by a cell process of encapsulating liquid crystal in a module, and a module process of attaching a driver IC or attaching a back light.

In this case, the cell process includes a rubbing process for inducing liquid crystal alignment, and a series of processes such as bonding of a substrate, injection of liquid crystal, and the like, wherein the rubbing process is performed to induce the alignment of the liquid crystal molecules. And the alignment film of the CF substrate.

As the alignment treatment method of the alignment film as described above, a rubbing method of rubbing the surface of the alignment film using a rubbing cloth is mainly used.

Referring to FIG. 1, the rubbing cloth 10 is adhered to the surface of the rubbing roller 1 so as to surround the outer circumferential surface of the cylindrical rubbing roller 1, and the rubbing cloth 10 is attached to the surface of the alignment layer 2. When the rubbing roller 1 rotates in the contacted state, the rubbing process is performed while the surface of the alignment layer 2 is rubbed by the rubbing cloth 10.

Meanwhile, referring to FIG. 2, the rubbing cloth 10 is a raising process in the form of a velvet fabric in which pile yarns 13 are planted in a fabric structure (paper tissue), which is generally composed of a warp yarn 11 and a weft yarn 12. Is prepared by.

The rubbing cloth 10 adjusts the pile density by changing the thickness of the pile and the thickness of the yarn used for the fabric, and the pile length is determined by the method of cutting the fabric.

Here, the fibers used for the pile yarn 11 may be those using long fibers such as rayon and nylon and short fibers such as cotton.

In order to manufacture the rubbing cloth, the velvet fabric for the rubbing cloth, that is, rubbing the fabric of the rubbing cloth, and then brushing for brushing and brushing for brushing to match the direction and the raising angle of the pile yarn to the pile yarn Is given. And the back surface (opposite side of the pile yarn) of the fabric tissue is coated with a resin so that the pile yarn 13 does not fall off from the fabric tissue, and after the coating treatment is performed, the rubbing cloth fabric is subjected to a hair wool process. By arranging the length of the pile yarn 13 uniformly, the pile thickness of the rubbing cloth fabric is uniformly adjusted.

Orientation quality varies depending on the pile thickness of the rubbing cloth used in the rubbing process, the degree of raising of the pile yarn 13 and the direction of the pile yarn, and in particular, a length deviation occurs between the pile yarns 13 If the pile thickness is uneven, the quality of the liquid crystal display is degraded due to poor rubbing.

Since the pile yarn 13 of the rubbing cloth fabric is cut to a non-uniform length in the weaving process, the length deviation between pile yarns is primarily reduced in whole hair. In addition, the rubbing cloth fabric is subjected to a washing process, a brush process, and a coating process, so that the file thickness variation occurs, such as a portion of the file lying down or protruding. The hair removal apparatus shown in 3 undergoes the hair removal process again.

However, the remaining foreign material 10a, such as foreign matter attached to the pile yarn 13 in the processing step, pile foreign matter generated in the whole wool process and not separated from the rubbing cloth fabric, and attached to the pile yarn 13, is illustrated in FIG. As shown in Fig. 4, it is eliminated by the alignment film in the rubbing process and remains on the substrate, thereby acting as a defect that makes the liquid crystal drive uneven. In particular, in the case of a rubbing cloth for manufacturing a liquid crystal display device, it is difficult to completely remove the rubbing cloth residue by a general washing process in a rubbing cloth manufacturing process by using a cellulose-based pile having a high specific gravity as the pile yarn.

Therefore, in the rubbing process, after washing the alignment layer, the washing process is performed using isopropyl alcohol and water to remove foreign substances dropped on the alignment layer during rubbing of the substrate. The effect of this washing process is different depending on the composition of the solvent used. If the concentration of isopropyl alcohol is high, the residual water is washed well, but the rubbing effect is reduced, so that the liquid crystal alignment force is weak, and the concentration of isopropyl alcohol is low. The problem is that residual foreign matters are not easily removed. In addition, the longer the washing process, the higher the process cost and the higher the manufacturing cost of the liquid crystal display. Thus, liquid crystal display manufacturers are improving the process in order to reduce the washing process and lower the concentration of isopropyl alcohol.

Accordingly, the present inventors have developed a rubbing cloth whole system that can maximize the washing efficiency in the washing process by minimizing foreign substances remaining in the rubbing cloth for manufacturing a liquid crystal display device.

The present invention is to solve the above problems, an object of the present invention is to provide a rubbing cloth whole system and a manufacturing method that can effectively remove the remaining foreign matter of the rubbing cloth.

Another object of the present invention, by effectively removing the remaining foreign matter of the rubbing cloth through the foreign matter removal unit after the entire hair process rubbing cloth that can prevent or minimize the defect of the liquid crystal display device caused by the foreign matter remaining in the rubbing process It is to provide a system and a manufacturing method.

Still another object of the present invention is to provide a rubbing cloth whole system and a manufacturing method which can reduce the process cost and the manufacturing cost of the liquid crystal display by simplifying the system for removing the remaining rubbing cloth.

In order to solve the above object, the present invention includes: a woolen unit for woolen yarns of rubbing cloth fabric; And it is provided on the downstream of the woolen unit provides a rubbing cloth wool system comprising a foreign material removal unit for removing the foreign matter remaining in the pile yarn of the rubbing cloth fabric drawn out from the woolen unit.

The foreign material removal unit is; It may include a foreign matter separating unit for separating the foreign matter from the pile yarn of the rubbing cloth fabric, and a foreign material suction unit for sucking the separated foreign matter.

Here, the foreign matter separation unit may include a friction brush that is rotated in contact with the pile yarn of the rubbing cloth fabric.

In this case, the hair of the friction brush may be formed of at least one of a fiber material and a metal material.

When the foreign matter separating unit is made of a friction brush that removes the foreign matter in contact with the pile yarn of the rubbing cloth fabric, the foreign matter suction unit is provided on the side of the friction brush to shake off the foreign matter, the pile by the friction brush It is preferable to inhale foreign matter dropped from the yarn.

The foreign matter separating unit may include a vibrating body applying vibration to the rubbing cloth fabric.

That is, the foreign matter separating portion may be made of a vibrating body that applies vibration to the paper tissue of the rubbing cloth fabric, and may shake off the foreign matter attached to the pile yarn by shaking the pile yarn.

In another aspect, the present invention comprises: a woolen cloth total wool step; And it provides a rubbing cloth manufacturing method comprising a foreign material removal step of removing the foreign matter remaining in the pile yarn of the rubbing cloth fabric after the hair wool step.

Here, the foreign material removal step; In order to remove the foreign matter, the step of inhaling the foreign matter by brushing the fabric cloth.

According to the rubbing cloth whole system and the method according to the present invention described above has the following effects.

First, according to the rubbing cloth whole wool system and the method of hair growth according to the present invention, it is possible to effectively remove the remaining foreign matter of the rubbing cloth by the foreign matter removal unit after the hair wool process.

Second, according to the rubbing cloth whole system and the method of the present invention, by effectively removing the remaining foreign matter in the rubbing cloth to prevent or minimize the defect caused by the remaining foreign matter in the rubbing process, as a result of the defective rate of the liquid crystal display device The productivity can be reduced and the quality of the liquid crystal display device can be improved.

Third, according to the rubbing cloth whole system and the method of the present invention, it is possible to simplify the structure of the device for removing the remaining foreign matter on the rubbing cloth to reduce the process cost, and further reduce the manufacturing cost of the liquid crystal display device.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention can be specifically realized the object of the present invention. In describing the present embodiment, the same designations and the same reference numerals are used for the same components, and further description thereof will be omitted.

First, with reference to the accompanying drawings, it will be described a preferred embodiment of the rubbing cloth whole system according to the present invention.

FIG. 5 is a cross-sectional view schematically showing an embodiment of a rubbing cloth whole system according to the present invention, and FIG. 6 is a cross-sectional view schematically showing an embodiment of a foreign matter removing unit applied to the rubbing cloth whole system shown in FIG. 5. 7 is a view for explaining an evaluation method for rubbing cloth foreign material evaluation.

5 and 6, the rubbing cloth whole system according to the present invention comprises a full hair unit 50 and the foreign material removal unit 100.

The woolen unit 50 is a component that cuts the pile yarns of the rubbing cloth fabric 10a to a predetermined length to uniformly pile the piles, and the foreign material removing unit 100 is provided downstream of the woolen unit. It is a component for removing foreign matter remaining in the pile yarn of the rubbing cloth fabric drawn out from (50).

The woolen unit 50 includes a woolen knife 51 and a woolen bed 52, wherein the woolen knife 51 cuts the pile yarns of the rubbing cloth fabric 10a to a predetermined length and the woolen bed. 52 supports the back of the rubbing cloth fabric.

An example of the full knife 51 is a rotary knife having a blade formed in a spiral direction on the outer circumferential surface of the cylindrical rotating body, but the full knife is not limited thereto.

In addition, the hair bed 52 may be applied with a support member having a substantially triangular cross-sectional shape, and in the state where the back surface of the rubbing cloth fabric 10a is supported in contact with the hair bed 52, the hair knife 51 is supported. Cuts the end of the pile yarn.

On the other hand, the rubbing cloth is to remove the glue, foreign matter, residual files, etc. attached in the yarn and weaving process through the water washing process before the woolen process, but the foreign material generated in the brush process and coating process to build the pile yarn after Attached to the rubbing cloth fabric 10a and remaining, the pile yarn short hair cut by the woolen knife 51 is not completely removed from the rubbing cloth fabric 10a even in the hair removal process.

As described above, foreign matters remaining in the rubbing cloth fabric 10a and foreign matter such as pile yarns are dropped from the rubbing cloth during the rubbing process of the LCD substrate and adhered to the alignment layer of the substrate, which is a cause of failure that inhibits LCD driving. Becomes

Accordingly, the rubbing cloth whole hair system according to the present invention is downstream of the hair covering unit 50 in order to remove foreign matters such as foreign matter and cut short hair remaining in the rubbing cloth fabric 10a which has been subjected to the hair removal process by the whole woolen unit. The foreign matter removing unit 100 is provided on the rubbing cloth fabric withdrawing side of the woolen unit 50.

The foreign material removing unit 100, the foreign material separating unit 110 for separating the foreign material 13a from the pile yarn of the rubbing cloth fabric (10a) and the foreign material 13a separated by the foreign material separating unit 110 It is configured to include a foreign material suction unit 120 to suck.

In this embodiment, the foreign matter separating unit 110 shakes the rubbing cloth fabric 10a to separate the foreign matter from the rubbing cloth fabric 10a. As an example, the foreign matter separating unit 110 is provided. ) May include at least one friction brush that is rotated in contact with the pile yarn of the rubbing cloth fabric 10a, and thus, the rubbing brush rotates at a high speed to shake off the rubbing cloth fabric 10a.

In addition, the foreign matter suction unit 120 may include a vacuum suction device, and vacuum suction the foreign matter 13a separated from the rubbing cloth fabric 10a or weakly attached to the rubbing cloth fabric by the friction brush. Remove

At this time, the hair (111) of the friction brush that substantially removes the foreign matter 13a from the rubbing cloth fabric 10a may be formed of at least one of a fiber material and a metal material.

In the present embodiment, the foreign matter separating unit 110 is sequentially disposed a plurality of the friction brushes spaced apart from each other along the conveying direction of the rubbing cloth fabric (10a), the rotation axis of the friction brushes of the rubbing cloth fabric It is substantially orthogonal to the conveying direction, but is not limited thereto.

The plurality of friction brushes may be disposed adjacent to each other and include two friction brushes that rotate in opposite directions, that is, forward and reverse directions, respectively. That is, the friction brush located upstream of the two friction brushes rotates in the same direction as the conveying direction of the rubbing cloth fabric, and the other one located downstream moves in the opposite direction to the conveying direction of the rubbing cloth fabric. Two friction brushes shake off the foreign matter into their interspaces.

Referring to FIG. 6, the friction brush on the left (upstream) is rotated counterclockwise and the friction brush on the right (downstream) is rotated clockwise to shake off the foreign matter 13a of the rubbing cloth fabric 10a. .

Here, the foreign matter suction unit 120 is provided on the side where the friction brush shakes off the foreign matter 13a in order to effectively suction and remove the foreign matter 13a that the friction brush shakes off. That is, in the case of the friction brush which rotates in the same direction as the conveying direction of the rubbing cloth fabric, the foreign material suction unit is provided downstream thereof, and in the case of the friction brush which rotates in the direction opposite to the conveying direction of the rubbing cloth fabric, upstream thereof. The foreign matter suction unit is provided. In this embodiment, it is provided between or between the two friction brushes that rotate in opposite directions to each other.

In this embodiment, the foreign matter separating unit 110 and the foreign matter suction unit 120 is disclosed as being made of a separate component, but is not limited thereto, and the foreign matter separating unit 110 and the foreign substance suction unit ( 120 may be formed in an integral configuration. As an example, a vacuum suction device may be installed on at least one friction brush to shake off the rubbing cloth fabric 10a to inhale and remove the dropped foreign material 10a while dropping the foreign material 13a.

On the other hand, the foreign material removal unit 100 of the present embodiment has been disclosed in the form of a brush to shake off the foreign material (13a) by rotating in contact with the rubbing cloth fabric (10a) as the foreign material separation unit 110, but is not limited thereto. The foreign matter separation unit having various shapes may be applied by applying an external force to the rubbing cloth fabric 10a to shake off the foreign matter remaining on the rubbing cloth fabric 10a. As an example, provided with a vibrating body on one side of the rubbing cloth fabric (10a) by applying a vibration or shock to the rubbing cloth fabric (10a) by the vibrating body to remove the foreign matter from the rubbing cloth fabric and through the foreign matter suction unit Inhalation and removal of the dropped foreign matter may be applied.

Hereinafter, the failure rate caused by the rubbing cloth and the rubbing cloth remaining foreign material according to the embodiment of the rubbing cloth according to the present invention and other comparative examples were compared with each other. However, the following examples are merely illustrative of the present invention, and the present invention is not limited to the following examples.

Comparative Example 1

Plain weave with inclination density 60 / inch and weft density 120 / inch using ramp cupra ammonium rayon filament 120d / 75f (Asahi 産, Japan), weft cuproammonium rayon filament 75d / 50f (Asahi 産, Japan) Woven with a weaving cloth fabric (paper tissue) was woven. Using a viscose rayon filament 100d / 40f (Enka®, Germany) as a pile yarn, a pile fabric was woven into a W shape by a known pile loom so as to have a pile density of 32,000ea / cm 2.

The pile fabric prepared as described above was refined by a known process, treated with a resin, and coated with a brush and a coating agent. The coated rubbing cloth fabric was subjected to a hair wool process with 1.80 mm using a known hair wool unit (hair device).

At this time, the conditions of the woolen step was a fabric feed rate of 5m / min, 11 necked whole knife, knife speed was set to 1,000 RPM. The appearance of piles was evaluated by the appearance inspection of the finished fabric of rubbing cloth, and the number of foreign materials remaining on the rubbing cloth was measured and compared through the evaluation of dropping foreign materials.

Example 1

Using the same fabric as in Comparative Example 1 was refined by a known process to the resin treatment, brush and coating treatment. The coated rubbing cloth fabric has a foreign material removing unit including a foreign material separating unit (dot-type bristle friction brush) and a foreign material suction unit (vacuum suction device) at the lead-out unit of the woolen unit (collar device). It was preprocessed to 1.8mm using. The friction brushes were rotated in a forward direction and a reverse direction, respectively, in a pair to proceed to remove foreign materials.

At this time, the conditions of the woolen step was a fabric feed rate of 5m / min, 11 neck full knife, the knife rotational speed was 1.000 RPM. In addition, the appearance of the pile was evaluated by the external inspection of the rubbing cloth fabric after the hair removal process and the foreign material removal process, and the number of foreign substances remaining on the rubbing cloth was measured and compared through the evaluation of the foreign material dropping.

The rubbing cloth prepared in Comparative Example 1 and Example 1 as described above was measured in the following manner, the appearance and residual foreign material, and compared to evaluate the process failure rate in the IPS-type liquid crystal display manufacturing process is shown in Table 1.

* Appearance evaluation: The rubbing cloth appearance, such as pile filing, was examined while passing through the fabric inspection device.

* Foreign material dropout evaluation: After the rubbing cloth fabric was cut into 1M * 1M size, the foreign material was dropped in the residual foreign material evaluation device (see FIG. 7) by vibration, and the number of foreign materials was measured. The foreign matter evaluation device is a device for separating foreign matters by applying a vibration shock to the rubbing cloth fabric 10a and measuring the number of the separated foreign materials, the foreign matter separated from the rubbing cloth fabric is a foreign matter evaluation plate through the dust collecting pipe 210. It is placed on the surface of (220).

* Process Defect Rate: The manufacturing method of the liquid crystal display of the IPS method was compared with the rubbing defect rate that may be generated by the remaining rubbing cloth in the liquid crystal display manufacturing process.

division Comparative example Example Whole water washing division none Friction Brush / Suction Device Exterior ◎ ◎ Foreign objects
(ea / ㎡) 120 26 Defective rate (% foreign matter) 0.67 0.05

* Appearance: ◎ Good, ○ Normal, △ Bad

In the above table, the washing of the whole hairs depends on whether the foreign material removal step is performed after the hairsing step. As described above, according to the rubbing cloth whole system and the rubbing cloth manufacturing method according to the present invention, it can be seen that the number of foreign matters remaining in the rubbing cloth according to Example 1 is significantly reduced and the process defect rate is improved as compared with Comparative Example 1.

As described above, the preferred embodiments of the present invention have been described, and the fact that the present invention can be embodied in other specific forms in addition to the above-described embodiments without departing from the spirit or scope thereof has ordinary skill in the art. It is obvious to them.

Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

1 is a cross-sectional view showing a general rubbing device.

2 is a view schematically showing the configuration of a general rubbing cloth.

3 is a view schematically showing a general woolen unit.

Figure 4 is a photograph showing the drop out of the pattern and the pattern of the rubbing cloth residual foreign matter generated in the rubbing process.

5 is a cross-sectional view schematically showing an embodiment of a rubbing cloth full hair system according to the present invention.

FIG. 6 is a schematic cross-sectional view of an embodiment of a foreign matter removing unit applied to the overall system shown in FIG. 5.

7 is a view for explaining an evaluation method for rubbing cloth foreign material evaluation.

DESCRIPTION OF THE RELATED ART [0002]

10a: Loving cloth fabric 50: Whole unit

51: full knife 52: full bed

100: foreign matter removal unit 110: foreign matter separation unit

120: foreign matter suction unit

Claims (7)

A woolen unit for knitting pile yarns of a rubbing cloth fabric; And And a foreign material removal unit provided downstream of the woolen unit to remove foreign matter remaining in the pile yarn of the rubbing cloth fabric drawn out from the woolen unit. The method of claim 1, The foreign material removal unit is; And a foreign matter separation unit separating the foreign matter from the pile yarn of the rubbing cloth fabric, and a foreign matter suction unit for sucking the separated foreign matter. The method of claim 2, The foreign matter separating unit includes a rubbing cloth whole system including a friction brush that is rotated in contact with the pile yarn of the rubbing cloth fabric. The method of claim 3, Hair of the friction brush (hair) is a rubbing cloth overall system is formed of at least one of a fiber material and a metal material. The method of claim 2, The foreign matter separating unit including a rubbing body including a vibrating body for applying vibration to the rubbing cloth fabric. A total step of totaling the rubbing cloth fabric; And Rubbing cloth manufacturing method comprising a foreign material removal step of removing the foreign matter remaining in the pile yarn of the rubbing cloth fabric after the woolen step. The method of claim 6, The foreign material removal step; In order to remove the foreign matter, the rubbing cloth manufacturing method comprising the step of inhaling the foreign material by shaking the fabric.

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