JP4495447B2 - Method for suppressing adhesion of adhesive to adhesive member, stacking table and tray - Google Patents

Description

The present invention relates to a method for suppressing adhesive adhesion of an adhesive member, a stacking table, and a tray .

  As an adhesive member having an adhesive, there is one in which the adhesive is exposed at an edge portion. For example, in the case of a film-like pressure-sensitive adhesive member (hereinafter also referred to as a pressure-sensitive adhesive film), when a product containing this pressure-sensitive adhesive film is manufactured or shipped at the cutting portion when the pressure-sensitive adhesive film is cut, it is manufactured or packaged. There is a problem that the pressure-sensitive adhesive in the cut portion of the pressure-sensitive adhesive member adheres to the other articles used in the above.

  This will be described below by taking an adhesive optical film used as an optical member as an example. For example, a polarizing plate, a retardation plate, a brightness enhancement film, etc., of an optical member used in an image display device such as a liquid crystal display (LCD) are attached to a liquid crystal cell or a glass substrate holding the liquid crystal. In order to match, the adhesive processing which applies an adhesive is made | formed, and has taken the form of the adhesive film.

  The pressure-sensitive adhesive optical film used as the optical member is usually produced by cutting a roll-shaped raw material, and the pressure-sensitive adhesive processing as described above is almost always performed in this roll-shaped state. ing. The roll-shaped raw fabric is cut into a product size for bonding to a liquid crystal cell or the like. Generally, cutting into this product size is performed by punching using a blade die, so-called Thomson type. It is made by the press-cut process. In the pressure-sensitive adhesive optical film prepared by cutting in this way, the pressure-sensitive adhesive is exposed at the cutting portion.

  On the other hand, as a product including an adhesive member having an adhesive, for example, a product including an optical member including an adhesive optical film, a single product of the optical member of the adhesive optical film alone, or an optical member including the adhesive optical film There is a laminated product of optical members laminated, and the ratio of the latter laminated product tends to increase as the performance of the LCD improves. FIG. 5 shows a configuration example of a polarizing plate and an elliptically polarizing plate on which an adhesive optical film is laminated.

  The polarizing plate Q1 shown in FIG. 5 (A) is composed of a surface protective film F1, a polarizing film F2, a pressure-sensitive adhesive N for bonding to a liquid crystal cell, etc., and a release film G as seen from above. It has become.

  The elliptically polarizing plates Q2 and Q3 shown in FIGS. 5B and 5C have a surface protective film F1, a polarizing film F2, an adhesive N, a retardation film F3 (FIG. 5) that protect the surface as viewed from above. In the case of the elliptically polarizing plate Q3 shown in (C), the pressure-sensitive adhesive N, the retardation film F3), the pressure-sensitive adhesive N for bonding to the liquid crystal cell, and the release film G are further configured.

  The polarizing plate Q4 with the brightness enhancement film shown in FIG. 5D is bonded to the surface protective film F1, the brightness enhancement film F4, the adhesive N, the polarizing film F2, the liquid crystal cell, and the like that protect the surface as viewed from below. The adhesive N and the release film G are used.

  The elliptically polarizing plate Q5 with a brightness enhancement film shown in FIG. 5E is a surface protective film F1, a brightness enhancement film F4, a pressure sensitive adhesive N, a polarizing film F2, a pressure sensitive adhesive N, and a phase difference that protect the surface as viewed from below. The film F3, the pressure-sensitive adhesive N for bonding to the liquid crystal cell, and the release film G are used. In FIGS. 5A to 5E, the release film G is peeled off and discarded when the polarizing plates Q1 to Q5 are bonded to a liquid crystal cell or the like.

  The optical member including the pressure-sensitive adhesive optical film configured as described above is stored and transported by being stacked on a stacking table D ′ as shown in FIG. And the polarizing plates Q1-Q5 etc. are manufactured as the laminated product Q of the optical member by which the optical member containing an adhesion type optical film was laminated | stacked by two or more.

  In addition, for the laminated product Q of the optical member manufactured as described above or the single product Q of the optical member of the adhesive type optical film as described above, for example, 1 or 1 is provided in a tray T ′ as shown in FIG. Two or more are placed and stored and / or transported. In the illustrated example, a plurality of products Q are stacked and overlapped on a two-fold tray T ′ having a notch M. A plurality of products Q stacked and overlapped in this manner are wound around by a fixing tape B provided in a notch portion M on the other tray side with one tray side folded in two as the middle. The fixing tape B is affixed to the one tray side at the affixing portion B1, so that the affixing tape B is fixed to the tray T ′ and stored and / or transported. Regarding the optical member single product Q and the optical member laminated product Q thus stored and / or transported, the optical member single product Q is, for example, laminated and bonded together as an optical member laminated product as shown in FIG. In the laminated product Q of the optical member, for example, an optical display such as an LCD is manufactured as a product including the optical member.

  Further, for the single product Q of the optical member and the laminated product Q of the optical member, for example, one or two or more are packed in a packing member P ′ as shown in FIGS. 7A and 7B. In the example of FIG. 7 (A), a plurality of products Q (the products Q are stacked) are bundled and packed by a belt band P ′ (P1 ′). In the example of FIG. A plurality of products Q (stacked products Q) packaged in a bag P ′ (P2 ′) are further packaged in an aluminum bag P ′ (P3 ′). The optical member single product Q and the optical member laminated product Q thus packed are shipped as a packed product in which a product including an adhesive member is packed.

  By the way, in the polarizing plate Q and the like as described above, when another article comes into contact with the portion where the adhesive N is exposed in the cut portion (see FIG. 5), the adhesive adheres to the other article that comes into contact. The adhesive may fall off from the adhesive film.

  For example, in the stacking table D ′ and the tray T ′ as shown in FIG. 6 and the packing member P ′ as shown in FIG. The pressure-sensitive adhesive N is likely to adhere to the contacted part, and as a result, the pressure-sensitive adhesive N is likely to fall off from the pressure-sensitive adhesive film. When the adhesive N adheres to the stacking table D ′, the tray T ′, and the packaging member P ′, dirt due to the adhesion of the adhesive N, and further foreign matter adheres to the adhered adhesive N, and the adhesive from the adhesive film. When N falls off, the adhesive is chipped, and appearance problems such as poor appearance are likely to occur in any of the other articles to which the adhesive N is attached or products including the adhesive member from which the adhesive N is dropped. It becomes. In addition, this is so remarkable that many adhesive films, such as a polarizing film, a phase difference film, and a brightness improvement film, are laminated | stacked.

  Conventionally, the adhesive member lacks the adhesive member due to contact with the exposed portion of the adhesive member at the edge portion of the adhesive member, and stains due to the adhesive material adhering to the other member are suppressed. For this reason, a portion of the other article that can be contacted with the adhesive (for example, a non-adhesive packaging material that surrounds the adhesive member) is subjected to a silicone treatment, a fluorine treatment, or the like (see, for example, Patent Document 1) or an adhesive. The member itself is processed (for example, refer to Patent Document 2). However, when the above-described silicone treatment, fluorine treatment, or the like is performed, such a suppression effect cannot be sustained over a long period of time, so that there is a problem that reprocessing or the like is necessary, and that the cost is high. Moreover, when processing the said adhesive member itself, it must process for every adhesive member, and it takes an effort so much.

  The present invention was made in view of the above problems, and is a pressure-sensitive adhesive adhesion suppressing method for a pressure-sensitive adhesive member that suppresses adhesion of the pressure-sensitive adhesive to other articles at the edge of the pressure-sensitive adhesive member having the pressure-sensitive adhesive, Without processing the adhesive member itself, it is possible to suppress adhesion of the adhesive to the other article at the edge of the adhesive member, and to maintain the suppression effect for a longer period of time than before, and to reduce the cost accordingly. It is an object of the present invention to provide a method for suppressing adhesion of an adhesive to an adhesive member.

  The present invention is further an integrated table for collecting and storing and transporting an optical member including an adhesive optical film having an adhesive prepared by cutting, without processing the optical member itself, It is an object of the present invention to provide an integrated table that can suppress the adhesion of the pressure-sensitive adhesive at the cut portion of the optical film and can maintain such a suppression effect for a longer period of time than before and can reduce the cost accordingly.

  The present invention further relates to a tray used when storing and / or transporting a product provided with an optical member including a pressure-sensitive adhesive optical film having a pressure-sensitive adhesive produced by cutting, wherein the optical member itself is It is an object of the present invention to provide a tray that can suppress the adhesion of the pressure-sensitive adhesive at the cut portion of the optical film without being processed, and can maintain such a suppression effect over a longer period of time than before, thereby reducing the cost. .

Japanese Patent Laid-Open No. 10-175664 JP-A-10-186129

  The present inventor has made extensive studies to solve the above problems, and has found the following. That is, in suppressing adhesion of the pressure-sensitive adhesive to the other article at the edge of the pressure-sensitive adhesive member having the pressure-sensitive adhesive, at least a part of the other article that can be contacted with the pressure-sensitive adhesive at the edge of the pressure-sensitive adhesive member By using a plastic material whose surface irregularities have a center line average roughness (Ra) of about 0.4 μm to 100 μm, more preferably a center line average roughness (Ra) of about 2.5 μm to 20 μm, It has been found that the loss of the adhesive in the pressure-sensitive adhesive member due to the other article coming into contact with the exposed portion of the adhesive at the edge portion and the contamination due to the adhesive adhesion of the other article can be suppressed.

  Further, among the plastic materials, if a material made of polypropylene resin or a material mainly composed of polypropylene resin is adopted, or the average interval (Sm) of the surface irregularities of the plastic material is about 100 μm to 1500 μm, It has been found that the suppression effect is more excellent when the average interval (Sm) of the surface irregularities is preferably about 300 μm to 1000 μm.

  According to such knowledge, the adhesive lack in the adhesive member and the stains due to the adhesion of the adhesive of other articles are equivalent to the conventional case where silicone treatment or fluorine treatment is applied to the part where the adhesive of other articles can be contacted. Or the suppression effect beyond it is acquired. In addition, regarding the sustainability of such an inhibitory effect, a plastic material is used as the material of the part that can be contacted with the adhesive of other articles. It is clearly advantageous compared to the case where fluorine treatment or the like is performed.

The present invention is based on such knowledge, and in order to solve the above-mentioned problems, the following pressure-sensitive adhesive adhesion suppressing method for a pressure-sensitive adhesive member, a stacking table and a tray are provided.

(1) Adhesive adhesion suppression method of adhesive member Adhesive adhesion suppression method of an adhesive member that suppresses adhesion of the adhesive to other articles at the edge portion of the adhesive member having an adhesive, comprising an accumulation table and a tray As a material of a portion where the pressure-sensitive adhesive can be contacted at least at the edge of the pressure-sensitive adhesive member, a plastic material having a surface irregularity of center line average roughness (Ra) of 0.4 μm to 100 μm is used. A pressure-sensitive adhesive adhesion-suppressing method for a pressure-sensitive adhesive member, characterized by contacting the pressure-sensitive adhesive.

According to this method for suppressing adhesion of an adhesive to an adhesive member, the surface irregularities are centerline average roughness (Ra) as a material of a portion of the stacking table or tray at which the adhesive can be contacted at the edge of the adhesive member. Since a plastic material having a thickness of 0.4 μm to 100 μm is used, adhesion of the pressure-sensitive adhesive at the edge of the pressure-sensitive adhesive member can be suppressed without processing the pressure-sensitive adhesive member itself. It can be sustained and the cost can be reduced accordingly.

( 2 ) Accumulation stage In an accumulation stage for accumulating and storing and transporting an optical member including an adhesive optical film having an adhesive created by cutting, the adhesive in at least the cutting portion of the optical film is An integrated table characterized in that a plastic material whose surface irregularities have a center line average roughness (Ra) of 0.4 μm to 100 μm is provided in a portion that can be contacted.

  According to this stacking table, since at least a portion of the optical film where the adhesive can be contacted is provided with a plastic material having a surface irregularity of centerline average roughness (Ra) of 0.4 μm to 100 μm, Without processing the optical member itself, the adhesion of the pressure-sensitive adhesive at the cut portion of the optical film can be suppressed, and the suppression effect can be maintained for a longer period than before, and the cost can be reduced accordingly.

( 3 ) Tray In a tray used when storing and / or transporting a product provided with an optical member including an adhesive optical film having an adhesive prepared by cutting, at least in a cutting portion of the optical film A tray, wherein a plastic material having a surface irregularity of center line average roughness (Ra) of 0.4 μm to 100 μm is provided in a portion where the adhesive can be contacted.

  According to this tray, a plastic material having a surface irregularity of center line average roughness (Ra) of 0.4 μm to 100 μm is provided at least in a portion where the adhesive can be contacted in the cut portion of the optical film. Without processing the member itself, adhesion of the pressure-sensitive adhesive at the cut portion of the optical film can be suppressed, and the suppression effect can be maintained for a longer period than before, and the cost can be reduced accordingly.

Examples of the image display device include a liquid crystal display (LCD), an electroluminescence display (ELD), a plasma display panel (PDP), and a field emission display (FED). Emission Display).

  The center line average roughness (Ra) of the surface irregularities in the plastic material is about 0.4 μm to 100 μm, more preferably about 2.5 μm to 20 μm. As an average space | interval (Sm) of the surface asperity of the said plastic material, about 100 micrometers-1500 micrometers can be illustrated, More preferably, about 300 micrometers-1000 micrometers can be illustrated. The centerline average roughness (Ra) and the average interval between surface irregularities (Sm) are larger or smaller than the above range, that is, Ra is larger than about 100 μm or smaller than about 0.4 μm. In addition, even if the Sm is larger than about 1500 μm or smaller than about 100 μm, the adhesion degree of the adhesive increases anyway, so that the adhesion of the adhesive easily occurs. Is likely to fall off.

  The surface irregularities in the plastic material may be formed by surface treatment. However, even if the plastic material is not subjected to surface treatment, it is sufficient that the Ra with surface irregularities falls within the above range (0.4 μm to 100 μm). When the surface unevenness is formed by surface treatment, the means for forming the surface unevenness is not particularly limited, and for example, the surface unevenness may be formed by embossing, sandblasting, cutting, or the like. The surface irregularities may be formed by coating a resin or coating a resin containing particles or the like. Especially, since processing is comparatively easy, it is preferable to form surface unevenness | corrugation by embossing. As the plastic material, any resin material may be employed, but it is particularly desirable to employ a material made of polypropylene resin or a material mainly composed of polypropylene resin.

Examples of the adhesive member include an optical member including an adhesive optical film having an adhesive. The “adhesive optical film” referred to in the present specification is an optical member having an adhesive and is not limited to a so-called film-like one, and refers to an optical member having a relatively thin thickness, specifically, Examples thereof include a film-like optical member having an adhesive. The optical member including the adhesive optical film includes a single adhesive optical film having an adhesive and a stack of a plurality of adhesive optical films having an adhesive. For example, when the pressure-sensitive adhesive member is an optical member including a pressure-sensitive adhesive optical film having a pressure-sensitive adhesive prepared by cutting, in the pressure-sensitive adhesive adhesion suppressing method for pressure-sensitive adhesive members of the present invention, at least the stacking table or tray as the material of the portion where the pressure-sensitive adhesive may be contacted in the cutting portion of the optical film, it may be used before Symbol plastic material.

  Examples of the product including the adhesive member and the product including the optical member include a single product of an optical member made of a single adhesive optical film having an adhesive, and a plurality of optical members including an adhesive optical film having an adhesive. Examples thereof include a laminated product of laminated optical members, a single product of the optical member, and / or a product obtained by stacking the laminated products of the optical member.

Sequentially described below with the member that can be used in the present invention.
<Adhesive optical film>
Examples of the adhesive optical film include conventionally known optical films used for the formation of image display devices, and are not particularly limited. Examples of the optical film include a polarizing plate, a circularly polarizing plate, and an elliptically polarizing plate. A plate, a polarization conversion element, a reflection plate, a semi-transmission plate, a phase difference plate (including a wave plate (λ plate) such as 1/2 or 1/4), a viewing angle compensation film, a brightness enhancement film, a transparent conductive film, and The thing which laminated | stacked two or more layers through the adhesive layer or the adhesive bond layer can be mentioned.

<Adhesive>
The pressure-sensitive adhesive composition forming the pressure-sensitive adhesive layer is not particularly limited as long as it does not adversely affect the required optical properties. For example, an acrylic polymer and a silane coupling agent are blended with an acrylic polymer. And those obtained by adding a photopolymerization initiator to an acrylic polymer and irradiating with ultraviolet rays (UV).

<Release film>
It is not preferable to leave or transport the pressure-sensitive adhesive layer in contact with the air interface as it is exposed, and it is preferable to provide a release film layer for the purpose of protection until use. As the release film, for example, an appropriate thin layer such as a synthetic resin film such as polyethylene, polypropylene, polyethylene terephthalate, rubber sheet, paper, cloth, non-woven fabric, net, foamed sheet, metal foil, and a laminate thereof is used. Can do. In addition, the surface of the release film is preferably subjected to treatments such as silicone treatment, long-chain alkyl treatment, and fluorine treatment as necessary in order to enhance the peelability from the pressure-sensitive adhesive layer.

<Polarizing plate>
A polarizing plate is mainly used for a liquid crystal display device, for example, what has a surface protection film on the single side | surface or both surfaces of a polarizing film can be used.

<Polarizing film>
As the polarizing film, for example, a film obtained by aligning a dichroic substance such as iodine on a substrate film such as polyvinyl alcohol (PVA) can be used. Although it does not specifically limit as thickness of a polarizing film, About 5 micrometers-about 80 micrometers can be illustrated.

<Surface protection film>
As the surface protective film to be bonded to one or both sides of the polarizing film, various polymer films can be used, and those having excellent transparency, mechanical strength, thermal stability, moisture shielding property, isotropy and the like are preferable. For example, a cellulose polymer such as triacetyl cellulose can be suitably used.

<Ellipse polarizing plate, circular polarizing plate>
When changing linearly polarized light into elliptically polarized light or circularly polarized light, changing elliptically polarized light or circularly polarized light into linearly polarized light, or changing the polarization direction of linearly polarized light, a retardation film or the like is used. In particular, a so-called quarter-wave plate (also referred to as a λ / 4 plate) is used as a retardation film that changes linearly polarized light into circularly polarized light or changes circularly polarized light into linearly polarized light. A half-wave plate (also referred to as a λ / 2 plate) is usually used when changing the polarization direction of linearly polarized light. What laminated | stacked the said polarizing plate on such retardation film can be made into an elliptically-polarizing plate or a circularly-polarizing plate.

<Phase difference film>
Examples of the retardation film include a birefringent film obtained by uniaxially or biaxially stretching a polymer material, an oriented film obtained by orienting a liquid crystal monomer, followed by crosslinking and polymerization, an oriented film of a liquid crystal polymer, and a liquid crystal polymer. The alignment layer may be separately supported by a film. The stretching treatment can be performed by, for example, a roll stretching method, a long gap stretching method, a tenter stretching method, a tubular stretching method, or the like. In the case of uniaxial stretching, the stretching ratio may be about 1.1 to 3 times, but is not limited thereto. Although it does not specifically limit as thickness of a phase difference film, About 10 micrometers-200 micrometers, Preferably about 20 micrometers-100 micrometers can be illustrated. In addition, the retardation film may have an appropriate retardation according to the purpose of use, for example, for the purpose of compensating for coloring or viewing angle due to birefringence of various wavelength plates and liquid crystal layers. What laminated | stacked the retardation film of the seed | species or more and controlled optical characteristics, such as retardation, may be used.

  Examples of the polymer material include polyvinyl alcohol, polyvinyl butyral, polymethyl vinyl ether, polyhydroxyethyl acrylate, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose, polycarbonate, polyarylate, polysulfone, polyethylene terephthalate, polyethylene naphthalate, polyether sulfone. , Polyphenylene sulfide, polyphenylene oxide, polyallylsulfone, polyvinyl alcohol, polyamide, polyimide, polyolefin, polyvinyl chloride, cellulosic polymers, or binary, ternary various copolymers, graft copolymers, A blend can be mentioned. These polymer materials can be oriented (stretched film) by stretching or the like.

<Reflector>
The reflective plate can be used as, for example, a reflective sheet in which a reflective layer is provided on an appropriate film according to the protective film, instead of the method of directly applying to the surface protective film of the polarizing plate. In addition, since the reflective layer is usually made of metal, the reflective surface is used in a state of being covered with a protective layer, a polarizing plate or the like. Therefore, the reflectance is prevented from lowering due to oxidation, and thus the initial reflectance is long-lasting. This is preferable due to the above points and the point of avoiding the additional attachment of the protective layer.

<Viewing angle compensation film>
The viewing angle compensation film is a film for widening the viewing angle so that an image can be seen relatively clearly even when the screen of the liquid crystal display device is viewed from a slightly oblique direction rather than perpendicular to the screen. Examples of such viewing angle compensation films include alignment films such as retardation films and liquid crystal polymers, and films in which an alignment layer such as a liquid crystal polymer is supported on a transparent substrate. A normal retardation plate is a birefringent polymer film that is uniaxially stretched in the plane direction, whereas a retardation plate used as a viewing angle compensation film is biaxially stretched in the plane direction, for example. Bi-directional stretching such as polymer films with birefringence, biaxially stretched uniaxially in the plane direction and stretched in the thickness direction, such as polymers with birefringence with controlled refractive index in the thickness direction and tilted orientation films A film or the like is used. Examples of the inclined alignment film include a film obtained by bonding a heat shrink film to a polymer film and stretching or / and shrinking the polymer film under the action of the contraction force by heating, or a film obtained by obliquely aligning a liquid crystal polymer. Can be mentioned. As the raw material polymer of the retardation film, for example, the same polymer material as described in the previous retardation film can be used, and prevention of coloring or the like due to a change in viewing angle based on the retardation by the liquid crystal cell or An appropriate one for the purpose of, for example, widening the viewing angle for good visual recognition can be used.

<Polarization conversion element>
Examples of the polarization conversion element include an anisotropic reflection polarization element and an anisotropic scattering polarization element. As an anisotropic reflection type polarizing element, a cholesteric liquid crystal layer, particularly an oriented film of a cholesteric liquid crystal polymer, or one of the counterclockwise and clockwise circles, such as those in which the oriented liquid crystal layer is supported on a film substrate, is used. A composite of a material that reflects polarized light and transmits other light and a phase difference plate having a phase difference of 0.25 times any wavelength in the reflection band, or a dielectric It is preferable to transmit linearly polarized light having a predetermined polarization axis and reflect other light, such as a multilayer thin film of a body or a multilayer laminate of thin film having different refractive index anisotropy. Examples of the former include the PCF series manufactured by Nitto Denko Corporation, and examples of the latter include the DBEF series manufactured by 3M Corporation. Moreover, a reflective grid polarizer can also be preferably used as the anisotropic reflective polarizing element. Examples thereof include MicroWires manufactured by Maxtek. On the other hand, examples of the anisotropic scattering polarizing element include DRPF manufactured by 3M.

<Brightness enhancement film>
A polarizing plate obtained by bonding a polarizing plate and a brightness enhancement film is usually provided on the back side of a liquid crystal cell. The brightness enhancement film may exhibit a characteristic of reflecting linearly polarized light having a predetermined polarization axis or circularly polarized light in a predetermined direction and transmitting other light when natural light is incident by a backlight such as a liquid crystal display device or reflected light from the back side. In the polarizing plate in which the brightness enhancement film is laminated with the polarizing plate, light from a light source such as a backlight is incident to obtain transmitted light in a predetermined polarization state, and light other than the predetermined polarization state is not transmitted. The light reflected and reflected from the surface of the brightness enhancement film is inverted through a reflective layer provided on the back side of the light, and re-enters the brightness enhancement film, and part or all of the light is transmitted as light in a predetermined polarization state. In addition to increasing the amount of light transmitted through the brightness enhancement film, the polarized film is supplied with polarized light that is difficult to absorb, and is absorbed into the polarizing film together with light that can be used for liquid crystal image display and the like. Supplies were hardly polarized light is, it is capable to improve the luminance by promoting an increase in the amount of light that may be utilized in the liquid crystal image display or the like. Furthermore, if light is incident through the polarizing film from the back side of the liquid crystal cell with a backlight or the like without using the brightness enhancement film, the light having a polarization direction that does not coincide with the polarizing axis of the polarizing film is It is almost absorbed by the polarizing film and does not pass through the polarizing film. Furthermore, although depending on the characteristics of the polarizing film to be used, approximately 50% of the light is absorbed by the polarizing film, so that the amount of light that can be used for liquid crystal image display or the like is reduced, and the image becomes dark. The brightness enhancement film reflects light that has a polarization direction that is absorbed by the polarization film, is not reflected on the polarization film, is reflected once by the brightness enhancement film, and then inverted through a reflective layer or the like provided behind the brightness enhancement film. The light is incident again on the brightness enhancement film, and only the polarized light whose polarization direction is reflected and reversed between the two can pass through the polarizer is transmitted to the polarizing film. Since it supplies, light, such as a backlight, can be efficiently used for the display of the image of a liquid crystal display device, and a screen can be made bright.

  As described above, according to the present invention, there is provided a pressure-sensitive adhesive adhesion suppressing method for a pressure-sensitive adhesive member that suppresses adhesion of the pressure-sensitive adhesive to other articles at an edge portion of the pressure-sensitive adhesive member having the pressure-sensitive adhesive. Adhesion of the pressure-sensitive adhesive member that can suppress adhesion of the pressure-sensitive adhesive to the other article at the edge portion of the pressure-sensitive adhesive member without being processed, and can maintain such a suppression effect over a longer period of time than before, thereby reducing the cost. An agent adhesion suppression method can be provided.

  Furthermore, according to the present invention, there is provided an integration stage for accumulating and storing and transporting an optical member including an adhesive optical film having an adhesive prepared by cutting, without processing the optical member itself. In addition, it is possible to provide an integrated table that can suppress the adhesion of the pressure-sensitive adhesive at the cut portion of the optical film and can maintain such a suppression effect for a longer period of time than before, thereby reducing the cost.

  Further, according to the present invention, the tray is used when storing and / or transporting a product having an optical member including an adhesive optical film, which has been cut and manufactured, and the optical member itself is processed. In addition, it is possible to provide a tray that can suppress the adhesion of the pressure-sensitive adhesive at the cut portion of the optical film and can maintain such a suppression effect for a longer period of time than before, thereby reducing the cost.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an example D of the stacking table according to the present invention for carrying out the method for suppressing the adhesive adhesion of the pressure sensitive adhesive member according to the present invention and an example Q of a product including the pressure sensitive adhesive member according to the present invention.

  The stacking table D shown in FIG. 1 is for stacking and storing and / or transporting optical members (an example of an adhesive member) each including an adhesive optical film F having an adhesive prepared by cutting. A bottom plate D1 and side plates D2 and D3 erected upward from the two adjacent sides of the bottom plate D1.

  And in the part R which can contact the adhesive N in the cutting part of the optical film F at least inside the side plates D2 and D3 in the stacking table D, the surface unevenness has a center line average roughness (Ra) of about 0.4 μm to 100 μm. And a plastic material (in this example, surface treatment by embossing) that has been subjected to a predetermined surface treatment (in this example, surface treatment by embossing) so as to have an average interval (Sm) of unevenness of about 100 μm to 1500 μm (in this example, from polypropylene resin) Or a material mainly composed of polypropylene resin). Here, a material made of polypropylene resin or a material mainly composed of polypropylene resin is adopted as the material of the side plates D2 and D3 itself.

  A plurality of pressure-sensitive adhesive optical films F are accumulated on the accumulation table D and stored and transported. And as a laminated product Q (an example of a product including the adhesive member F) of optical members in which a plurality of adhesive optical films F are integrated, for example, a polarizing plate, an elliptically polarizing plate, etc. as shown in FIG. 5 are manufactured. .

  According to the stacking table D for carrying out the method for suppressing pressure-sensitive adhesive adhesion of the pressure-sensitive adhesive member according to the present invention described above, the surface unevenness is at least the center line average roughness in the portion R where the pressure-sensitive adhesive N in the cut portion of the optical film F can be contacted (Ra) Since a plastic material having a thickness of about 0.4 μm to 100 μm is provided, adhesion of the adhesive N at the cut portion of the optical film F can be suppressed without processing the optical film F itself. It can be sustained for a longer period than before, and the cost can be reduced accordingly. Furthermore, since the average interval (Sm) of the surface irregularities is about 100 μm to 1500 μm, the suppression effect is more excellent.

  Further, according to the laminated product Q of optical members shown in FIG. 1 (an example of a product including the adhesive member F), since the stacking table D shown in FIG. 1 is used, the adhesive N is not processed without processing the adhesive member F itself. Dropping can be suppressed, and the appearance defect can be suppressed accordingly.

  FIG. 2 (A) is a development view showing an example T of a tray according to the present invention for carrying out the method for suppressing adhesive adhesion of the pressure sensitive adhesive member according to the present invention, and FIG. 2 (B) includes the optical member according to the present invention. 3 is a perspective view showing a state in which an example Q of the product is arranged on the tray T shown in FIG.

  The tray T shown in FIG. 2 is used when storing and / or transporting the product Q provided with the optical member, and has four notches M. Of the four notches M, 2 (the lower two in FIG. 2A) are provided with fixing tapes B. In addition, the product Q provided with the optical member includes, for example, a single product Q of the optical member F made of a single adhesive optical film F, a laminated product Q of an optical member in which a plurality of adhesive optical films F are laminated, and an optical member F. Product Q and / or product Q obtained by stacking laminated products of optical members.

  Then, at the portion R where the adhesive N can be contacted at least at the cutting portion of the optical film F in the central portion in the long side direction (see FIG. 2A) along the short side direction in the state in which the tray T is developed, A predetermined surface treatment (in this example, a surface by embossing) so that the center line average roughness (Ra) is about 0.4 μm to 100 μm and the average interval of unevenness (Sm) is about 100 μm to 1500 μm. (In this example, a material made of polypropylene resin or a material mainly composed of polypropylene resin) is provided. Here, as the material of the tray T itself, a material made of polypropylene resin or a material mainly composed of polypropylene resin is adopted.

  In this tray T, for example, as shown in FIG. 2 (B), a plurality of products Q are integrated and overlapped. A plurality of products Q stacked and overlapped in this manner are wound around by a fixing tape B provided in a notch portion M on the other tray side with one tray side folded in two as the middle. The fixing tape B is fixed by being attached to one tray side at the attaching portion B1, and stored and / or transported. As for the single product Q of the optical member F and the laminated product Q of the optical member F thus stored and / or transported, the single product Q of the optical member F is, for example, laminated and bonded together as a laminated product of the optical member. 5 is manufactured, or in the laminated product Q of the optical member, for example, an image display device such as an LCD is manufactured as the product Q that is bonded to a liquid crystal cell or the like and includes the optical member. .

  According to the tray T for carrying out the method for suppressing the adhesive adhesion of the adhesive member according to the present invention described above, the surface irregularities are centerline average roughness at least in the portion R where the adhesive N in the cut portion of the optical film F can be contacted. (Ra) Since a plastic material having a thickness of about 0.4 μm to 100 μm is provided, adhesion of the adhesive N at the cut portion of the optical film F can be suppressed without processing the optical film F itself. It can last longer than that, and the cost can be reduced accordingly. Furthermore, since the average interval (Sm) of the surface irregularities is about 100 μm to 1500 μm, the suppression effect is more excellent.

  Moreover, according to the product Q provided with the optical member shown in FIG. 2, since it is stored and / or transported and manufactured using the tray T shown in FIG. 2, the adhesive N can be manufactured without processing the optical member itself. Dropping can be suppressed, and the appearance defect can be suppressed accordingly.

  Further, according to the image display device manufactured as described above, since it has the product Q provided with the optical member, it is possible to suppress the drop-off of the adhesive N without processing the optical member itself. Can be suppressed.

  FIG. 3A is a perspective view for explaining an example of the packing method according to the present invention, and FIG. 3B is a perspective view for explaining another example of the packing method according to the present invention.

  In the packaging products E1 and E2 shown in FIG. 3, the single product Q of the optical member F and the laminated product Q of the optical member are, for example, as shown in the packaging member P1 as shown in FIG. 3 (A) and FIG. 3 (B). 1 or 2 or more are packed in the packing members P2 and P3. More specifically, as shown in FIG. 3 (A), a plurality of products Q (product Q stacked) are bundled and packaged by a packaging member (in this example, a belt band P1 including a sheet plate S). As shown in FIG. 3B, a plurality of products Q (stacked products Q) packaged in a packaging member (in this example, a plastic bag P2 including a sheet plate S) are further packaged in an aluminum bag P3. Has been. In addition, the product Q provided with the optical member includes, for example, a single product Q of the optical member F made of a single adhesive optical film F, a laminated product Q of an optical member in which a plurality of adhesive optical films F are laminated, and an optical member F. Product Q and / or product Q obtained by stacking laminated products of optical members.

  And in the part R which can contact the adhesive N in the cutting part of the optical film F at least in the packing members P1 and P2, the surface unevenness has a center line average roughness (Ra) of about 0.4 μm to 100 μm. In addition, a plastic material (in this example, a material made of a polypropylene resin or polypropylene, which has been subjected to a predetermined surface treatment (in this example, a surface treatment by embossing) so that the average interval (Sm) of irregularities is about 100 μm to 1500 μm. A sheet plate S) made of a resin-based material is provided.

  More specifically, in the example of FIG. 3 (A), the sheet R is subjected to the surface treatment between the cut portion of the optical film F and the band P1, so that the surface of the portion R faces the cut portion. A plate S is arranged. In the example of FIG. 3 (B), the surface R of the surface treated portion R faces the cut portion between the cut portion of the optical film F and the portion of the plastic bag P2 where the adhesive N can be contacted. The sheet plate S is arranged so as to do so.

  The single product Q of the optical member F and the laminated product Q of the optical member thus packaged are shipped as the packed products E1 and E2 in which the product including the adhesive member F is packed.

  According to the packing method described above, the surface irregularities have a center line average roughness (Ra) of 0.4 μm to 4 μm as the material of the portion R to which the adhesive N in at least the cut portion of the optical film F of the packing members P1, P2 can be contacted. Since a plastic material having a thickness of 100 μm is used, adhesion of the adhesive N to the packing members P1 and P2 at the cut portion of the optical film F can be suppressed without processing the optical film F itself. It can be sustained for a long time, and the cost can be reduced accordingly. Furthermore, since the average interval (Sm) of the surface irregularities is about 100 μm to 1500 μm, the suppression effect is more excellent.

  Moreover, according to the packing products E1 and E2 shown in FIG. 3, since the product Q including the adhesive member F is packed using the packing members P1 and P2 used in the above-described packing method, the adhesive member F itself is processed. Therefore, it is possible to suppress the drop-off of the pressure-sensitive adhesive N, and it is possible to suppress the appearance failure.

  Next, examples of the present invention will be described below together with comparative examples. However, the present invention is not limited to the embodiments.

"Evaluation 1"
While preparing 100 sheets of polarizing plate Q (Nitto Denko HEG1425DU: size 310 mm × 234 mm absorption axis 45 °) including the adhesive optical film F, two integrated tables Dx as shown in FIG. 4A are prepared. Then, the polarizing plates Q are stacked one by one on one stacking table Dx, and are sequentially stacked up to 100 sheets. Next, the polarizing plates Q integrated on one integration stage Dx are moved one by one to the other integration stage Dx and integrated, and the polarizing plates Q on one integration stage Dx are sequentially transferred to the other integration stage Dx. Move everything to. After repeating this operation 100 times, a part R where the adhesive N in the polarizing plate Q of the two stacking stands Dx can be touched was touched with a finger, and the adhesion state of the adhesive N was examined.

The adhesion state of the adhesive N was evaluated as follows. That is,
X: Adhesive N is adhered and stickiness is large.
(Triangle | delta): Adhesive N has adhered a little and a stickiness is felt a little.
○: There is almost no adhesion of the adhesive N, and stickiness is not felt.

"Evaluation 2"
A laboratory shaker L (RECIPRO SHAKER NR-1 manufactured by TAITEC) as shown in FIG. 4 (B) is prepared, and a polarizing plate Q (HEG1425DU manufactured by Nitto Denko Corporation: size 310 mm × 234 mm) including the adhesive optical film F on the tray Tx. (Absorption axis 45 °) 50 sheets are sandwiched, and the tray Tx sandwiching the polarizing plate Q is put in the box B with the portion R to which the adhesive N in the polarizing plate Q can be contacted facing down. After fixing the tray Tx, the box B containing the tray Tx was placed on the lab shaker L. At this time, the reciprocating direction (X direction in the figure) and the direction of the long side direction of the polarizing plate Q were matched. Then, after reciprocating 50,000 times at a speed of 100 times / min, the part R of the polarizing plate Q of the tray Tx where the pressure-sensitive adhesive N can be contacted was touched with a finger, and the adhesion state of the pressure-sensitive adhesive N was examined.

The adhesion state of the adhesive N was evaluated in the same manner as in the evaluation 1. That is,
X: Adhesive N is adhered and stickiness is large.
(Triangle | delta): Adhesive N has adhered a little and a stickiness is felt a little.
○: There is almost no adhesion of the adhesive N, and stickiness is not felt.

"Evaluation 3"
The release film of the polarizing plate Q is peeled off to adhere the polarizing plate Q to the portion R where the adhesive N in the polarizing plate Q of the polarizing plate Q of the integrated table Dx shown in FIG. The degree of adhesion between the portion R to which the agent N can come into contact with the polarizing plate Q was subjected to sensory evaluation.

The degree of adhesion was evaluated as follows. That is,
○: It does not adhere so much and easily peels off.
(Triangle | delta): Although it closely_contact | adheres, it can peel comparatively easily.
X: It is hard to stick and peel off.

  As the material of the part R to which the adhesive N of the polarizing plate Q can be contacted, the following evaluations were performed using the following materials.

Example 1
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The irregularities that have been surface treated are
Centerline average roughness (Ra) 3.4 μm
Average spacing of irregularities (Sm) 877 μm
It was. In addition, said Ra and Sm were measured using the surface roughness measuring machine "The Taylor Hobson Co., Ltd. product, Form Talysurf S5C." The same applies to Examples 2 to 12 and Comparative Examples 1 to 10 below.

(Example 2)
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The irregularities that have been surface treated are
Centerline average roughness (Ra) 10.5μm
Average spacing of irregularities (Sm) 330 μm
It was.

(Example 3)
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The irregularities that have been surface treated are
Centerline average roughness (Ra) 11.6 μm
Average interval of unevenness (Sm) 446 μm
It was.

Example 4
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The irregularities that have been surface treated are
Centerline average roughness (Ra) 15.4 μm
Average spacing of irregularities (Sm) 900 μm
It was.

(Example 5)
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The surface irregularities are
Centerline average roughness (Ra) 4.5μm
Average spacing of irregularities (Sm) 1730 μm
It was.

(Example 6)
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The surface irregularities are
Centerline average roughness (Ra) 6.3 μm
Average spacing of irregularities (Sm) 72 μm
It was.

(Example 7)
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The surface irregularities are
Centerline average roughness (Ra) 0.6 μm
Average interval of unevenness (Sm) 280 μm
It was.

(Example 8)
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The surface irregularities are
Centerline average roughness (Ra) 19.3 μm
Average interval of unevenness (Sm) 430 μm
It was.

Example 9
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The surface irregularities are
Centerline average roughness (Ra) 33.4 μm
Average spacing of irregularities (Sm) 620 μm
It was.

(Example 10)
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The surface irregularities are
Centerline average roughness (Ra) 96 μm
Average spacing of irregularities (Sm) 88 μm
It was.

(Example 11)
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The surface irregularities are
Centerline average roughness (Ra) 22 μm
Average spacing of irregularities (Sm) 288 μm
It was.

(Example 12)
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The surface irregularities are
Centerline average roughness (Ra) 1.8 μm
Average spacing of irregularities (Sm) 1470 μm
It was.

(Comparative Example 1)
The material of the portion of the polarizing plate that can be contacted with the adhesive was made of a stainless steel plate of SUS304. The surface irregularities are
Centerline average roughness (Ra) 0.1 μm
Average spacing of irregularities (Sm) 32 μm
Met.

(Comparative Example 2)
The material of the part of the polarizing plate that can be contacted with the pressure-sensitive adhesive was made of a SUS304 stainless steel plate subjected to silicone treatment. The surface irregularities are
Centerline average roughness (Ra) 0.1 μm
Average spacing of irregularities (Sm) 30 μm
Met.

(Comparative Example 3)
The material of the part of the polarizing plate that can be contacted with the adhesive was made of a SUS304 stainless steel plate subjected to fluorine treatment. The surface irregularities are
Centerline average roughness (Ra) 0.1 μm
Average spacing of irregularities (Sm) 31 μm
Met.

(Comparative Example 4)
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The surface irregularities are
Centerline average roughness (Ra) 0.1 μm
Average spacing of irregularities (Sm) 2480 μm
Met.

(Comparative Example 5)
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The surface irregularities are
Centerline average roughness (Ra) 130 μm
Average spacing of irregularities (Sm) 850 μm
Met.

(Comparative Example 6)
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The surface irregularities are
Centerline average roughness (Ra) 140 μm
Average spacing of unevenness (Sm) 1940 μm
Met.

(Comparative Example 7)
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The surface irregularities are
Centerline average roughness (Ra) 0.2 μm
Average spacing of irregularities (Sm) 900 μm
Met.

(Comparative Example 8)
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The surface irregularities are
Centerline average roughness (Ra) 0.1 μm
Average spacing of irregularities (Sm) 80 μm
Met.

(Comparative Example 9)
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The surface irregularities are
Centerline average roughness (Ra) 120 μm
Average spacing of irregularities (Sm) 8.5 μm
Met.

(Comparative Example 10)
The material of the part which can be contacted with the pressure-sensitive adhesive of the polarizing plate was made of a polypropylene resin. The surface irregularities are
Centerline average roughness (Ra) 118 μm
Average spacing of irregularities (Sm) 1820 μm
Met.

The evaluation results are shown below.

  As shown in Table 1, in Examples 1 to 12, the adhesive N chipping in the polarizing plate Q and the stains due to the adhesive N adhering to the stacking table Dx and the tray Tx are equivalent to or compared to Comparative Examples 1 to 10. It turns out that the above suppression effect is acquired.

It is a perspective view which shows an example of the product containing the example of the integration | stacking base based on this invention which implements the adhesive adhesion suppression method of the adhesive member which concerns on this invention, and the adhesive member which concerns on this invention. Fig. (A) is a development view showing an example of a tray according to the present invention for carrying out the method for suppressing the adhesion of an adhesive to an adhesive member according to the present invention, and Fig. (B) shows a product including the optical member according to the present invention. It is a perspective view which shows the state arrange | positioned at an example to the tray shown to FIG. Fig. (A) is a perspective view for explaining an example of the packing method according to the present invention, and Fig. (B) is a perspective view for explaining another example of the packing method according to the present invention. FIG. (A) is a perspective view showing an integrated table and a polarizing plate used in Evaluations 1 and 3 of Examples and Comparative Examples, and FIG. (B) is a tray and polarizing plate used in Evaluation 2 of Examples and Comparative Examples. It is a perspective view which shows a laboratory shaker etc. It is a figure which shows typically the structural example of the polarizing plate by which the adhesion type optical film was laminated | stacked, and an elliptical polarizing plate, a figure (A) shows a polarizing plate, a figure (B) and a figure (C) show an elliptical polarizing plate, Further, FIG. (D) shows a polarizing plate with a brightness enhancement film, and FIG. (E) shows an elliptical polarizing plate with a brightness enhancement film. Fig. (A) is a perspective view showing an example of a conventional stacking table and an example of a product including an adhesive member, and Fig. (B) is a development view showing an example of a conventional tray and an example of a product including an optical member. It is a perspective view which shows the state arrange | positioned to this tray. Fig. (A) is a perspective view showing an example in which the optical member is packed by a conventional packing method, and Fig. (B) is a perspective view showing another example in which the optical member is packed by a conventional packing method.

Explanation of symbols

D ... Other articles, stacking table E1, E2 ... Packing product F ... Adhesive optical film N ... Adhesive P1, P2, P3 ... Packing member Q ... Product including adhesive member F, product provided with optical member, optical member Laminated product R ... part where adhesive N can be contacted T ... other goods, tray

Claims (10)

In a stacking table for collecting and storing and transporting an optical member including a pressure-sensitive adhesive optical film having a pressure-sensitive adhesive prepared by cutting, at least a portion where the pressure-sensitive adhesive can be contacted in a cutting portion of the optical film An integration stand, characterized in that a plastic material having a surface irregularity of center line average roughness (Ra) of 0.4 μm to 100 μm is provided. The stacking table according to claim 1, wherein an average interval (Sm) of surface irregularities of the plastic material is 100 μm to 1500 μm. The stacking table according to claim 1, wherein the surface irregularities are formed by a surface treatment. The integration stand according to any one of claims 1 to 3, wherein the plastic material is a material made of polypropylene resin or a material mainly composed of polypropylene resin. In a tray used when storing and / or transporting a product provided with an optical member including a pressure-sensitive adhesive optical film having a pressure-sensitive adhesive prepared by cutting, at least the pressure-sensitive adhesive in the cutting portion of the optical film is A tray, characterized in that a plastic material having a surface roughness of 0.4 μm to 100 μm is provided on a portion that can be contacted. The tray according to claim 5, wherein an average interval (Sm) of surface irregularities of the plastic material is 100 μm to 1500 μm. The tray according to claim 5 or 6, wherein the surface irregularities are formed by a surface treatment. The tray according to any one of claims 5 to 7, wherein the plastic material is a material made of polypropylene resin or a material mainly composed of polypropylene resin. 5. A method for suppressing adhesion of an adhesive to an adhesive member using the stacking table according to claim 1, wherein the surface irregularities have a center line average roughness (Ra) of 0.4 μm to 100 μm. A method for suppressing adhesion of a pressure-sensitive adhesive to a pressure-sensitive adhesive member, wherein the pressure-sensitive adhesive at least in the cut portion of the optical film is brought into contact with a portion of an integration stand on which a material is provided. A method for suppressing adhesion of a pressure-sensitive adhesive to a pressure-sensitive adhesive member using the tray according to any one of claims 5 to 8, wherein a plastic material having a surface irregularity of center line average roughness (Ra) of 0.4 µm to 100 µm is provided. A method for suppressing adhesion of an adhesive to an adhesive member, comprising bringing the adhesive in contact with at least a cut portion of the optical film into contact with a portion of the tray .