JP2005212900A - Packaging structure for optical sheets and packaging method for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging structure for optical sheets and packaging method for the same, which enable reduction of such situations wherein an adhesive layer material included in an optical sheet comes out when the packaging structure comes in contact with the optical sheet. <P>SOLUTION: The optical sheet 102 having an adhesive layer is wrapped with a packaging bag 212a, a first packaging component. The materials of the packaging bag 212a includes a plastic base material and polysiloxane. The packaging bag 212a is then wrapped with an aluminum bag 222 that is a second packaging component made of an opaque material. For the plastic base material, one is selected out of the groups made up of polyethylene and polyethylene terephthalate, and a polysiloxane and plastic base material content is kept smaller than 5 wt.%, preferably smaller than 3 wt.%. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to packaging of optical sheets, and more particularly to a packaging structure and packaging method of an optical sheet having an adhesive layer.

  The liquid crystal display has advantages such as high image quality, small volume, light weight, low voltage driving, low power consumption, and wide application range. Therefore, it is widely used in consumer electronic products or computer products such as small and medium-sized portable TVs, mobile phones, video cameras, notebook computers, desktop displays, and projection TVs, and gradually becomes a cathode ray tube (CRT). ) Was replaced and became the mainstream of the display.

  The basic principle of a liquid crystal display is to first arrange polarizing plates on both sides of the liquid crystal layer of the liquid crystal pixel, control the alignment direction of the liquid crystal molecules in the liquid crystal layer by an electric field, and adjust the level at which the light beam of the liquid crystal pixel passes by the polarizing plate. Control. Therefore, the polarizing plate is an important and important component for the liquid crystal display, that is, the quality of the polarizing plate itself has a close relationship with the screen quality of the liquid crystal display.

  In general, a liquid crystal display manufacturer purchases various polarizing plates from a polarizing plate manufacturer according to the requirements of the standard or price, and uses them for arranging liquid crystal panels. The manufacturer of the polarizing plate transports the completed polarizing plate to the manufacturer of the liquid crystal display and attaches it to both sides of the liquid crystal panel.

  However, since the polarizing plate is a precise optical sheet, it was easily damaged by being contaminated by collision or dust in the air. Therefore, before transporting the polarizing plate, it is necessary to protect it by packaging, and to prevent the polarizing plate from being damaged and contaminated by the external environment. In addition, a polarizing plate is created by adhering multiple optical layers, but if the polarizing plate is simply packaged with ordinary packaging without being treated by special packaging or methods, The material of the contained pressure-sensitive adhesive layer was contacted and rubbed out to contaminate the surface of the polarizing plate.

  FIG. 1A shows a packaging method according to the prior art, and FIG. 1B is a flowchart of FIG. 1A. As shown in FIGS. 1A and 1B, in the prior art, first, two release films 112 and a release film 114 are crossed in a cross shape, and the polarizing plate 102 is wrapped (step 132). Since the surface of the release film 112 and the release film 114 is specially treated, the adhesive layer material in the polarizing plate does not flow out. Subsequently, the polarizing plate whose outer layer has already been wrapped with the release film is put into the aluminum bag 122 (step 134), and the packaging of the polarizing plate is completed. The light is blocked by the aluminum bag 122 so that external light rays are not irradiated onto the polarizing plate and destroyed.

  However, in order to prevent the pressure-sensitive adhesive layer material from flowing out, the surface of the release film 112 and the release film 114 has to be subjected to a special treatment, which is expensive. In addition, the conventional packaging method shown in FIG. 1A has to use three packaging parts, a release film 112, 114 and an aluminum bag 122. The release film 112 and the release film 114 are crossed in a cross shape. Since the polarizing plate 102 had to be wrapped, the defect occurrence rate when packaging the polarizing plate increased, and the cost burden of materials, labor, and time increased. Furthermore, since the packaging structure is complicated, it is difficult to automate the packaging, and it is difficult for the manufacturer of the polarizing plate to improve the production efficiency and the production amount.

  Therefore, the main object of the present invention is to wrap or pack the optical sheet in the packaging part to which silicon is added, the packaging part rubs and contacts the optical sheet, and the contained adhesive layer material flows out. It is an object of the present invention to provide an optical sheet packaging structure that prevents and reduces the number of packaging parts to reduce the material cost and the packaging time required for it.

  Another object of the present invention is to provide an optical sheet packaging method that reduces packaging steps, increases the yield rate of the packaging process, reduces the cost of packaging labor, and facilitates the introduction of an automated packaging process. It is in.

  The present invention provides an optical sheet packaging structure for packaging the optical sheet having an adhesive layer. First, an optical sheet having an adhesive layer is wrapped by a first packaging part, and the material of the first packaging part includes a plastic substrate and polysiloxane. Thereafter, the first packaging portion is wrapped by the second packaging portion, and the second packaging portion is an opaque material.

  According to a preferred embodiment of the present invention, the optical sheet may be an optical element including a polarizing plate, sunglasses, or other adhesive layer. The packaging structure of the present invention may package not only a single optical sheet but also a plurality of optical sheets. The plastic substrate is selected from the group consisting of polyethylene or polyethylene terephthalate, and the content of polysiloxane and plastic substrate is preferably less than 5% by weight and less than 3% by weight.

  The first packaging part is a packaging bag, wrapping paper, packaging case, packaging box or other type of packaging part, and the second packaging part is an aluminum bag or other opaque packaging part, for example a packaging case or It is a packaging box. Moreover, when using a some optical sheet using a 1st packaging part, a spacer is put between an optical sheet and a 1st packaging part, and the damage of the optical sheet surface is reduced. Further, in this embodiment, an antistatic material is further added to the material of the first packaging part, and static electricity is generated between the first packaging part and the optical sheet to prevent the photoelectric sheet from being destroyed.

  The present invention replaces the conventional three packaging parts of the packaging structure with two, thereby reducing costs and improving yield and efficiency. Since the material of the first packaging part that wraps the optical sheet contains polysiloxane, the surface of the inner layer becomes smoother, and the adhesive layer material contained in the optical sheet flows out when it comes into contact with the optical sheet. Can be reduced. In addition, since the steps of the packaging method of the present invention are simple and do not require precise operation, not only the yield rate of the packaging process is increased, but also the labor cost during packaging is reduced, and the introduction of an automated packaging process is further facilitated. Become.

  The present invention replaces the conventional three packaging parts of the packaging structure with two, thereby reducing costs and improving yield and efficiency. In addition, the present invention adds a specific weight% of polysiloxane to the material of the packaging portion that comes into contact with the optical sheet to lower the friction coefficient of the inner layer surface of the packaging portion. Thus, in the prior art, the situation where the material of the pressure-sensitive adhesive layer flows out of the packaging portion and contaminates the optical sheet is improved.

  FIG. 2A shows a preferred embodiment of the present invention. Shown in FIG. 2B is another preferred embodiment of the present invention. FIG. 2C is a flow diagram illustrating the packaging steps of FIGS. 2A and 2B. In the following description, reference is made to FIGS. 2A to 2C.

  As shown in FIG. 2A, in the preferred embodiment, the first packaging part is a packaging bag 212a, the optical sheet is a polarizing plate 102, and the second packaging part is an opaque aluminum bag 222. First, after packaging the polarizing plate 102 with the packaging bag 212a (step 232), the packaging bag 212a containing the polarizing plate 102 is packaged with the aluminum bag 222 (step 234), thereby completing the packaging of the polarizing plate 102. .

  As shown in FIG. 2B, in the preferred embodiment, the first wrapping portion is wrapping paper 212b, the optical sheet is a polarizing plate 102, and the second wrapping portion is an opaque aluminum bag 222. First, the wrapping paper 212b is folded along the dotted line, and then the polarizing plate 102 is wrapped (step 232), and the wrapping paper 212b containing the polarizing plate 102 is wrapped with the aluminum bag 222 (step 234). Complete the packaging.

  2A and 2B show that the first packaging part can be in various forms depending on the situation, for example, the packaging bag of FIG. 2A or the packaging paper of FIG. 2B. It is the packaging of a large size optical sheet, and it is easy to automate the packaging process.

  The packaging structure of this embodiment can be used not only for a single optical sheet but also for a plurality of optical sheets. In addition, it is necessary to provide a more appropriate type of packaging unit in this embodiment for an optical sheet in which a plurality of sheets are stacked together. Next, with reference to FIGS. 3A to 3D, examples of various types of packaging parts of this embodiment and their packaging methods will be described.

  FIG. 3A is a preferred embodiment of the present invention. In this preferred embodiment, the first packaging part is a packaging bag 212a, the plurality of optical sheets 302 are polarizing plates 102 stacked together, and the second packaging part is an opaque aluminum bag. 222. First, after packaging a plurality of optical sheets 302 with the packaging bag 212a (step 232), packaging the packaging bag 212a containing the plurality of optical sheets 302 with the aluminum bag 222 (step 234). Complete.

  FIG. 3B is another preferred embodiment of the present invention. In this preferred embodiment, the first wrapping portion is wrapping paper 212b, the plurality of optical sheets 302 are a stack of a plurality of polarizing plates 102, and the second wrapping portion is opaque aluminum. This is a bag 222. First, the wrapping paper 212b is folded along a dotted line to wrap a plurality of optical sheets 302 (step 232), and then the wrapping paper 212b containing the plurality of optical sheets 302 is wrapped in an aluminum bag 222 (step 234). Complete the packaging. In addition, the spacers 304 are put on both surfaces of the plurality of optical sheets 302 to reduce the situation in which the surface of the two polarizing plates 102 as the outermost layer is damaged.

  FIG. 3C is another preferred embodiment of the present invention. In this preferred embodiment, the first packaging portion is a packaging case 306, the plurality of optical sheets 302 are a stack of a plurality of polarizing plates 102, and the second packaging portion is opaque aluminum. This is a bag 222. First, a plurality of optical sheets 302 are put in the packaging case 306 (step 232), and then the packaging case 306 containing the plurality of optical sheets 302 is packaged with the aluminum bag 222 (step 234) to complete the packaging. . In addition, the spacers 304 are put on both surfaces of the plurality of optical sheets 302 to reduce the situation in which the surface of the two polarizing plates 102 as the outermost layer is damaged.

  FIG. 3D is another preferred embodiment of the present invention. In this preferred embodiment, the first packaging portion is a packaging box 308, the plurality of optical sheets 312 are a stack of a plurality of polarizing plates 102, and the second packaging portion is opaque aluminum. This is a bag 222. First, a plurality of optical sheets 312 placed therein are wrapped in a packaging box 308 (step 232), and a packaging box 308 containing a plurality of optical sheets 312 is packaged in an aluminum bag 222 (step 234). To complete.

  Further, spacers 304 are respectively added to both surfaces of the plurality of optical sheets 302 to reduce the situation in which the surface of the outermost two polarizing plates 102 is damaged. Moreover, in a present Example, the system which piles up a some optical sheet and puts in a 1st packaging part is changed according to a process or needs. That is, for example, as shown in FIG. 3C, a plurality of optical sheets 302 are stacked in parallel in a packaging case 306, or as shown in FIG. 3D, a plurality of optical sheets 312 are vertically placed in a packaging box 308. It is a packaging method that can be stacked inside.

  The optical sheet having the pressure-sensitive adhesive layer is an optical element including a polarizing plate, sunglasses, or other pressure-sensitive adhesive layers. Further, in this embodiment, the first wrapping portion containing a plastic base material and polysiloxane as a material wraps the optical sheet, and the polysiloxane smoothly changes the inner layer surface of the first wrapping portion, thereby The adhesive layer material contained in the optical sheet is prevented from flowing out when contacting. Polyethylene (PE), polyethylene terephthalate (PET), polyamide (polyamide, nylon) or other plastic materials can be used for the plastic substrate, because of the low price of polyethylene and polyethylene terephthalate It is preferable to select them as the plastic substrate of this embodiment.

  The invention is also characterized by the weight percent between the polysiloxane and the plastic substrate. According to this example, the polysiloxane and plastic substrate is less than 5% by weight, preferably less than 3% by weight. Hereinafter, it will be described with reference to the result data of the measurement experiment of the present invention that the probability that the polarizing plate is contaminated in the packaging portion is reliably reduced.

  In this measurement experiment, the optical sheet is a 15-inch polarizing plate, the first packaging part is wrapping paper, and the second packaging part is an aluminum bag. Among them, the wrapping paper is classified into four types of wrapping paper in which no polysiloxane is added and one in which polysiloxane is added by 1 wt%, 2 wt%, and 3 wt%. In general, when the pressure-sensitive adhesive layer material contained in the polarizing plate flows out, the pressure-sensitive adhesive layer material forms small white spot-like contamination on the end face of the polarizing plate, and the larger the number of small white spots, It shows that there is much friction received by the polarizing plate.

  After performing standard pre-packaging steps such as cleaning and dust removal for the polarizing plate, as in the embodiment of FIG. 2B, first wrap the wrapping paper along the dotted line and wrap the polarizing plate, then aluminum Wrap the wrapping paper of the polarizing plate already wrapped in the bag. Table 1 shows small white spots generated on the end face of the polarizing plate when no polysiloxane is added and when four types of wrapping paper each containing 1%, 2%, and 3% polysiloxane are added. The effects of the present embodiment will be described by enumerating the numbers.

  As can be seen from Table 1, when polysiloxane is added to the wrapping paper in contact with the polarizing plate, the adhesive layer material contained in the polarizing plate flows out, and the probability of contaminating the polarizing plate can be greatly reduced. According to other embodiments of the present invention, the preferred weight percent of polysiloxane added in different plastic substrates varies depending on the plastic substrate and process differences, but the upper limit of addition is around 5%.

Moreover, when polysiloxane is added, the antistatic ability of the first packaging part can be further improved. In order to increase the antistatic force more effectively, the present embodiment is effective in adding an antistatic material such as an antistatic agent containing NH ₄ ⁺ to the material of the first packaging part. Not only can the contamination of the sheet be reduced, but also the optical sheet can be prevented from being destroyed by static electricity generated in the packaging part.

  However, it should be noted here that the gist of the present invention is that polysiloxane is added to the packaging portion for packaging the optical sheet, and the adhesive layer material flows out due to friction with the optical sheet, thereby contaminating the optical sheet. To reduce the situation. Therefore, other various applications of the present invention, for example, combining the first packaging part and the second packaging part to form the composite packaging part or the first packaging part, the material is dyed plastic and contains polysiloxane Application schemes such as making opaque packaging parts should also be included within the spirit and scope of the present invention.

  In the present invention, preferred embodiments have been disclosed as described above. However, these are not intended to limit the present invention, and any person who is familiar with the technology can use various embodiments within the scope and spirit of the present invention. Fluctuations and hydration can be added. Therefore, the scope of protection of the present invention is based on the contents specified in the claims.

It is a figure which shows the packaging of the conventional polarizing plate. It is a figure which shows the flow of the packaging of the conventional polarizing plate. 1 is a schematic diagram illustrating a preferred embodiment of the present invention. It is the schematic which shows the other suitable Example of this invention. It is a figure which shows the flow of the packaging method by the preferable Example of this invention. 1 is a schematic view showing a preferred embodiment of the present invention. It is the schematic which shows the other suitable Example of this invention. It is the schematic which shows the further another suitable Example of this invention. It is the schematic which shows the further another suitable Example of this invention.

Explanation of symbols

  102 polarizing plate, 212a packaging bag, 212b wrapping paper, 222 aluminum bag, 232, 234 steps, 302 plural optical sheets, 304 spacer, 306 packaging case, 308 packaging box, 312 plural optical sheets

Claims (22)

An optical sheet packaging structure for packaging an optical sheet having an adhesive layer,
Wrapping the optical sheet, including a base material and polysiloxane in the material, wherein the base material is selected from the group consisting of polyethylene or polyethylene terephthalate, and the content of the polysiloxane and the base material is less than 5% by weight A first packaging bag;
Wrapping the first packaging bag, and a second packaging bag made of an opaque material;
An optical sheet packaging structure comprising:   2. The optical sheet packaging structure according to claim 1, wherein the contents of the polysiloxane and the base material are preferably less than 3% by weight.   The optical sheet packaging structure according to claim 1, wherein the second packaging bag is an aluminum bag.   The optical sheet packaging structure according to claim 1, wherein the material of the first packaging bag further includes an antistatic material. An optical sheet packaging structure for packaging an optical sheet having an adhesive layer,
A first packaging portion that wraps the optical sheet and includes a plastic base material and polysiloxane as a material;
Wrapping the first packaging part, a second packaging part made of an opaque material;
An optical sheet packaging structure comprising:   6. The optical sheet packaging structure according to claim 5, wherein the plastic substrate is selected from the group consisting of polyethylene and polyethylene terephthalate.   6. The optical sheet packaging structure according to claim 5, wherein the content of the polysiloxane and the substrate is less than 5% by weight.   2. The optical sheet packaging structure according to claim 1, wherein the contents of the polysiloxane and the base material are preferably less than 3% by weight.   6. The optical sheet packaging structure according to claim 5, wherein the first packaging unit selects one from the group consisting of a packaging bag, a packaging paper, a packaging case, or a packaging box.   The optical sheet packaging structure according to claim 5, wherein the second packaging part is an aluminum bag.   6. The optical sheet packaging structure according to claim 5, wherein the material of the first packaging part further includes an antistatic material. An optical sheet packaging method for packaging an optical sheet having an adhesive layer,
Wrapping the optical sheet in a first packaging part containing a plastic base material and polysiloxane in the material;
Wrapping the first packaging part with a second packaging part made of an opaque material;
A method for packaging an optical sheet, comprising:   13. The optical sheet packaging method according to claim 12, wherein the plastic substrate is selected from the group consisting of polyethylene or polyethylene terephthalate.   13. The optical sheet packaging method according to claim 12, wherein the content of the polysiloxane and the base material is less than 5% by weight.   13. The optical sheet packaging method according to claim 12, wherein the content of the polysiloxane and the base material is preferably less than 3% by weight.   13. The optical sheet packaging method according to claim 12, wherein the first packaging unit selects one from the group consisting of a packaging bag, a wrapping paper, a packaging case, or a packaging box.   The optical sheet packaging method according to claim 12, wherein the second packaging part is an aluminum bag.   The method of packaging an optical sheet according to claim 12, wherein the material of the first packaging part further includes an antistatic material. An optical sheet packaging method for packaging an optical sheet having an adhesive layer,
The optical sheet includes a base material and polysiloxane as a material, and the base material is selected from the group consisting of polyethylene or polyethylene terephthalate, and the content of the polysiloxane and the base material is less than 5% by weight. Wrapping with one packaging bag,
Wrapping the first packaging bag with a second packaging bag made of an opaque material;
A method for packaging an optical sheet, comprising:   20. The optical sheet packaging method according to claim 19, wherein the contents of the polysiloxane and the base material are preferably less than 3% by weight.   20. The optical sheet packaging method according to claim 19, wherein the second packaging bag is an aluminum bag.   The optical sheet packaging method according to claim 19, wherein the material of the first packaging bag further includes an antistatic material.

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