WO2001039227A1 - Lamine et son procede de fabrication - Google Patents

Lamine et son procede de fabrication Download PDF

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Publication number
WO2001039227A1
WO2001039227A1 PCT/JP2000/008217 JP0008217W WO0139227A1 WO 2001039227 A1 WO2001039227 A1 WO 2001039227A1 JP 0008217 W JP0008217 W JP 0008217W WO 0139227 A1 WO0139227 A1 WO 0139227A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
soft
laminated
film
hard plastic
Prior art date
Application number
PCT/JP2000/008217
Other languages
English (en)
Japanese (ja)
Inventor
Yoji Nagae
Shinichirou Ishida
Original Assignee
Mitsubishi Plastics, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Plastics, Inc. filed Critical Mitsubishi Plastics, Inc.
Publication of WO2001039227A1 publication Critical patent/WO2001039227A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/06—Interconnection of layers permitting easy separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/024—Packing between substrate and membrane
    • H01H2229/028—Adhesive
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/044—Injection moulding

Definitions

  • the present invention relates to a laminated molded product and a method for producing the same.
  • Laminated moldings include sealing materials incorporated into electronic equipment, touch panel surface materials for display-related products, or various non-slip materials. Background art
  • a membrane switch is disclosed.
  • the electrodes 3 la are formed on the upper sheet 32 a made of insulating resin
  • the electrodes 31 b are formed on the lower sheet 32 b made of insulating resin by screen printing or the like.
  • An insulating sheet 33 is provided between the electrode 31a and the lower sheet 32b.
  • a hole 34 is formed between adjacent insulating sheets 33. As shown in Fig. 8 (b), the part of the upper sheet 32a corresponding to the hole 34 is When pressed in the direction shown in FIG. 2, the two electrodes 3 la and 31 b come into contact with each other to maintain the connection state of the switch.
  • Japanese Patent Laying-Open No. 7-52240 discloses a membrane switch provided with an embossed polyester resin embossed sheet 35.
  • the embossed sheet 35 has a large number of convex portions 35 a (only one is shown).
  • An insulation sheet 33 is sandwiched between the embossed sheet 35 and the lower sheet 32b.
  • the electrode 31a is provided inside the convex portion 35a.
  • a flexible top sheet 37 is provided at a position facing the lower sheet 32b via the insulating sheet 33, the embossed sheet 35 and the insulating layer 36.
  • the membrane switch shown in Fig. 9 a click feeling is obtained, and it is possible to intuitively check whether the switch is on or off.
  • the pressing portion of the membrane switch is covered with the flat surface sheet 37, when operated by a blind touch, a pressing error occurs.
  • the embossed sheet 35 is made of polyester resin (made of hard resin), so that the touch is hard and easy to slide. Further, since the electrode 31a is formed inside the projection 35a, the production of the switch becomes complicated. Disclosure of the invention
  • An object of the present invention is to provide a laminated injection-molded article that can be easily manufactured, suppresses surface slippage, and prevents a switch from being erroneously pressed, and a method for manufacturing the same.
  • the present invention provides a soft layer and a first and a second hard plastic.
  • the present invention provides a laminated molded article including a stick layer.
  • the soft layer has two faces.
  • the first hard plastic layer is adhered to one side of the soft layer.
  • a second hard plastic layer is releasably attached to the other side of the soft layer.
  • a hard plastic layer is adhered to one surface of the soft layer, and a film is laminated on the other surface so as to be peelable.
  • the film is a hard plastic film.
  • the film has a matte-coated surface, and the matte-coated surface is pressed against the other surface of the soft layer, so that the film can be peeled off from the soft layer.
  • a laminated molded article according to still another aspect of the present invention has an injection molded resin layer and a laminated film laminated on the injection molded resin layer.
  • the laminated film includes a soft plastic layer and a hard plastic layer adhered to each other, and the soft plastic layer is disposed outside in a state where the laminated film is laminated on the injection molded resin layer.
  • a hard plastic layer is adhered to one surface of a soft plastic layer, and a protective layer is releasably laminated to the other surface of the soft plastic layer.
  • a laminated film is formed.
  • the protective layer of the laminated film is set toward the mold surface of the injection mold. Then, by injecting the molding material toward the hard plastic layer, an injection resin layer is formed on the hard plastic layer.
  • FIG. 1A is a partially enlarged cross-sectional view of a laminated sheet according to a first embodiment of the present invention.
  • FIG. 1 (b) is a partially cutaway perspective view of the laminated sheet of FIG. 1 (a).
  • FIG. 2 is a partially enlarged sectional view of FIG.
  • FIG. 3 is a partially enlarged sectional view of the membrane switch sheet.
  • FIG. 4 is a partially enlarged cross-sectional view of the membrane switch.
  • FIG. 5 is a cross-sectional view of the laminated sheet according to the second embodiment.
  • FIG. 6 is a cross-sectional view for explaining a method of manufacturing the laminated sheet of FIG.
  • FIG. 7 is a partially enlarged cross-sectional view of the laminated sheet according to the third embodiment.
  • FIG. 8 (a) is a partially enlarged cross-sectional view of a conventional membrane switch.
  • FIG. 8B is a partially enlarged cross-sectional view showing a state where the switch of FIG. 8A is pressed.
  • FIG. 9 is a partially enlarged cross-sectional view of another conventional membrane switch.
  • a rectangular laminated sheet 1 includes a soft layer 2, a first hard plastic layer 3, and a protective film 4 made of a second hard plastic.
  • the first hard plastic layer 3 is firmly adhered to the lower surface of the soft layer 2 in FIG. Protective film 4 in FIG. 1 (a), and is releasably laminated on the upper surface of the soft layer 2.
  • a plurality of bulges 5 for a switch click are formed on the laminated sheet 1 at predetermined intervals, and are arranged in a matrix.
  • the bulging portion 5 is formed to have substantially the same size as a hole 9a provided at a position corresponding to the electrodes 8a and 10a of the membrane switch 7 described later.
  • the first hard plastic layer 3 is formed of a biaxially stretched polyethylene terephthalate film (biaxially stretched PET film).
  • the soft layer 2 is formed of a crosslinked silicone rubber composition.
  • the protective film 4 is made of a mat-coated biaxially stretched PET film. “The matte coating process is also called a matting process, in which fine irregularities are formed on the surface of the film, or a layer containing fine particles is applied. Will be described.
  • a bonding treatment is performed as necessary on a base film made of a biaxially stretched PET film having a predetermined thickness (for example, 12 m). Subsequently, the uncrosslinked silicone rubber composition is adhered onto the substrate film.
  • the thickness of the silicone rubber composition is 30 ⁇ IT! ⁇ 150 ⁇ m is preferred.
  • an undercoat layer is formed of a polyurethane resin or an amorphous polyester resin.
  • a thermosetting thin film layer containing a silicone resin having a high affinity for the undercoat layer is formed on the undercoat layer.
  • the silicone resin include a condensation type silicone resin.
  • the uncrosslinked silicone rubber composition for example, an electron beam crosslinking type or electron beam curing type silicone elastomer which can crosslink the silicone rubber by irradiating an electron beam is used.
  • the material of the silicone elastomer is mainly polydimethylsiloxane containing vinyl groups.
  • polydimethylsiloxane in which a part of methyl groups are substituted with phenyl group or trifluoropropyl group may be used.
  • a mat coat layer 4a is formed on the surface of the protective film 4 having a thickness of about 20 ⁇ m.
  • the protective film 4 is pressed against the silicone rubber composition while the mat coat layer 4a is in contact with the silicone rubber composition, thereby forming a laminate comprising the base film, the silicone rubber composition, and the protective film 4. 6 is formed.
  • the silicone rubber composition is crosslinked, and the silicone rubber composition becomes the soft layer 2.
  • the matte coat layer 4 a is disposed between the soft layer 2 and the protective finolem 4.
  • the irradiation dose of the electron beam is preferably from 20 kGy to 150 kGy.
  • the laminate 6 is pressed into a predetermined shape by a press machine to form a laminate sheet 1 as shown in FIG.
  • a membrane switch using the laminated sheet 1 of FIG. 1 and a method of manufacturing the same will be described.
  • the membrane switch 7 includes a main body 11.
  • the main body 11 includes a base (print substrate) 8, a spacer 9 made of an insulating material, and an insulating sheet 1. 0 is provided.
  • a plurality of electrodes 8a are arranged in a matrix on the base 8 at predetermined intervals.
  • the spacer 9 has a hole 9a corresponding to each electrode 8a. The hole 9a accommodates the electrode 8a and the electrode 10a which forms a switch together with the electrode 8a. Then, a laminate composed of the second hard plastic layer 3 and the soft layer 2 from which the protective film 4 has been peeled off from the laminated sheet 1 is laminated on the main body 11.
  • the bulging portion 5 of the laminate is disposed on the main body 11 at a position corresponding to each hole 9a.
  • the soft layer 2 is located outside the bulging portion 5 and the hard plastic layer 3 is located inside the bulging portion 5.
  • the laminated sheet 1 is punched into a predetermined shape according to the key arrangement of the desktop computer, and then the first hard plastic layer 3 is bonded to the insulating sheet 10 of the main body 11. It is laminated on the main body 11. Thereafter, the protective film 4 is peeled off from the laminated sheet 1 to expose the soft layer 2, that is, the surface of the crosslinked silicone rubber. When the protective film 4 is peeled off, the fine uneven pattern of the surface of the mat coat layer 4a is transferred to the outer surface of the soft layer 2 of the membrane switch sheet 12.
  • the membrane switch sheet 12 of the present embodiment has The touch when touching the bulging portion 5 of the switch sheet 12 is soft, and the slip on the surface is suppressed, so that the switch can be prevented from being erroneously pushed.
  • the soft layer 2 is formed of a crosslinked silicone rubber. Therefore, even when the membrane switch sheet 12 is stored or used at a relatively high temperature for a long period of time, it is hardly deteriorated, and as a result, the durability is improved. Since the silicone rubber composition is crosslinked by the electron beam, no heat is applied to the first hard plastic layer 3 and the protective film 4. Therefore, the first hard plastic layer 3 and the protective film 4 are not deteriorated by heat.
  • the soft layer 2 made of silicone rubber reinforces the flexibility of the hard plastic layer 3. Therefore, compared to the case where only a hard plastic layer such as a PET film is used, a decrease in flexibility due to repeated pressing and release of the bulging portion 5 is suppressed, and durability is improved.
  • the protective film 4 protects the soft layer 2. Further, the soft layer 2 is reliably protected by the protective film 4 until the laminated sheet 1 is provided in the membrane switch 7. Therefore, the soft layer 2 is not damaged.
  • the swelling portion 5 is pressed, it becomes difficult to slip due to the fine irregularities formed on the surface of the soft layer 2. By peeling off the protective film 4 after the mat treatment, fine irregularities are transferred to the surface of the soft layer 2.
  • the membrane switch 7 of the present embodiment requires the electrodes to be formed on the laminated sheet 1. And manufacturing becomes easier.
  • a membrane having a click feeling is provided. The switch can be manufactured easily.
  • FIG. 5 is a front cross-sectional view showing a laminated molded body according to the second embodiment
  • FIG. 6 is a front sectional view for explaining a method for manufacturing the laminated molded body of FIG.
  • a hard plastic layer 22 is provided between the injection molded resin layer 44 and the soft plastic layer 21.
  • the hard plastic layer 22 is firmly bonded to the injection molded resin layer 44, and the soft plastic layer 21 is disposed on the surface of the laminated molded body.
  • a laminated film 45 is constituted by the hard plastic layer 22 and the soft plastic layer 21.
  • the injection-molded resin layer 44 is formed by injecting a resin such as a high-impact polystyrene resin, an acrylonitrile-butadiene-styrene copolymer resin, or an acrylonitrile-styrene copolymer resin. It is obtained by molding.
  • Silicone rubber is preferably used for the soft plastic layer 21 having elasticity.
  • As the silicone rubber an electron beam crosslinkable silicone rubber, a millable silicone rubber, a liquid curable silicone rubber or the like, which is composed of a composition containing polydimethylsiloxane as a main component, is preferable.
  • Polydimethylsiloxane has dimethylsiloxane as the main monomer component.
  • Other monomer components include one or two methyl groups (one or three at the end) as a bul group, a phenyl group, and a long chain.
  • Alkyl group, fluoroalkyl group, hydroxy group ( silanol group), amino group, glycidyl group, alkoxy
  • a monomer substituted with a group, chlorine, hydrogen or the like can be used.
  • fillers, vulcanizing agents, property improvers, etc. to assist with various properties of silicone, such as processability, heat resistance, mechanical properties, adhesion, flame retardancy or reliability You can add ingredients.
  • the filler for example, silica, diatomaceous earth, quartz powder, calcium carbonate, silicone resin, bonbon and the like are used.
  • the vulcanizing agent an organic peroxide, a modified silane, a modified siloxane, an alkoxysilane, a platinum compound or the like is used.
  • a reaction inhibitor for adjusting the curability acetylene alcohol, cyclic methylvinylinolesiloxane, or the like is used.
  • the property improver includes a processing aid, a heat resistance improver, a reversion inhibitor, a flame retardant, and an adhesion improver.
  • a low-viscosity silicone oil containing a terminal silanol group or a terminal alkoxy group, a silicone resin, or a silane compound is used.
  • Metal oxides such as iron and nickel and metal organic acids are used as heat resistance improvers.
  • the reversion inhibitor include acid acceptors such as calcium oxide and barium oxide.
  • Flame retardants include platinum compounds, iron oxide, titanium oxide, and carbon.
  • a silane coupling agent is used as the adhesion improver.
  • the thickness of the soft plastic layer 21 is preferably 30 to 500 ⁇ . If it is less than 300 zm, it has an anti-slip effect, but its softness is somewhat insufficient. If it exceeds 500 ⁇ , the cost increases.
  • a biaxially stretched film such as polyethylene terephthalate (PET), polypropylene (PP), or polystyrene (PS) is used.
  • PET is most preferable as the material of the hard plastic layer 22 because the biaxially stretched polyethylene terephthalate film has high strength, high rigidity, and excellent click feeling and restoring force when used for a switch.
  • the injection mold 4 used for molding the laminated molded body is the first mold. 41 and a second molding die 46 are provided. Between the first molding die 41 and the second molding die 46, a projection 42 for forming a cavity 43 in the injection molding resin layer 44 is provided. Next, a method for producing a laminated sheet constituting a part of the laminated molded article will be described.
  • a primer having a polyurethane resin or an amorphous polyester resin as a main component is applied to a biaxially stretched PET film having a predetermined thickness, for example, a thickness of 12 ⁇ , and dried.
  • An uncrosslinked silicone resin is laminated on the dried film.
  • a protective layer 23 made of a biaxially stretched PET film having a thickness of 12 ⁇ m is pressed against the surface of the silicone resin using a rolling roll (not shown). At this time, the silicone resin is rolled so that the thickness of the silicone resin becomes, for example, 200 ⁇ . Thereafter, the silicone resin is irradiated with an electron beam to crosslink and cure the silicone resin, thereby producing silicone rubber.
  • a laminated film 20 having a soft plastic layer 21 made of silicone rubber is formed.
  • the protective layer 23 is peelable from the soft plastic layer 21.
  • the preferred range of the peel strength is that the protective layer 23 is separated from the soft plastic layer 21 by a T-peel test at a temperature of 20 ° C. with the soft plastic layer 21 fixed at a temperature of 30 Om mZ. When it is peeled off in a direction perpendicular to the soft plastic layer 21, it is 30 to 500 gf / 5 O mm.
  • a biaxially stretched film made of a hard plastic such as polyethylene terephthalate, polypropylene, or polystyrene, a semi-hard plastic such as polyethylene, an ethylene monobutyl acetate copolymer, or a paper surface is used. Those coated with a release agent such as silicone or fluorine are used.
  • a biaxially stretched PET film is used from the viewpoint of an appropriate peel strength for the soft plastic layer 21.
  • the laminated film 20 is press-molded, so that it corresponds to a switch. Small convex portions 201 are formed. At this time, since the soft plastic layer 21 is covered with the protective layer 23, the soft plastic layer 21 is not damaged.
  • the laminated film 20 is placed in the injection mold 4, and the opening of the second mold 46 is opened.
  • the part is closed by the first mold 41.
  • the melted acrylonitrile-styrene resin is injected toward the hard plastic layer 22 through the injection hole 411 by an extruder (not shown).
  • the acrylonitrile-styrene resin is injected between the first mold 41 and the hard plastic layer 22 and then cooled.
  • the acrylonitrile-styrene resin is firmly fused to the hard plastic layer 22 and solidified by cooling to form the injection-molded resin layer 44.
  • a laminated injection molded article shown in FIG. 5 is obtained.
  • FIG. 7 shows a film key 50 according to the third embodiment.
  • the film key 50 includes an injection-molded resin layer 52, and a plurality of protrusions 53 are formed on the resin layer 52.
  • a laminated film in which a soft plastic layer 21 and a hard plastic layer 22 are firmly bonded is laminated, and the soft plastic layer 21 is disposed on the surface side.
  • Multiple protrusions 5 3 and laminated film covering them Thus, a plurality of button sections 51 are configured.
  • a switch body (not shown) is arranged below each button section 51, and is used, for example, for a key of a mobile phone. Since the back surface of each button portion 51 is reinforced by the injection-molded resin layer 52, no deformation occurs, and the button portion 51 can be formed at a desired height.
  • the embodiment is not limited to the above, and may be embodied as follows, for example.
  • the method of crosslinking the silicone rubber is not limited to the method using an electron beam, but may be another method.
  • 150 in an addition type system.
  • Crosslinking takes place at about C.
  • a SiH group is added to the carbon double bond by a hydrosilylation reaction to effect crosslinking.
  • a silicone elastomer for example, a polysiloxane containing two or more vinyl groups is used as a base polymer, a siloxane oligomer having three or more SiH groups is used as a crosslinking agent, and a platinum compound is used as a catalyst. use.
  • an oriented polypropylene film OPP
  • PETZOPP laminating film A protective film is a laminated film in which a biaxially stretched ⁇ ⁇ ⁇ film is attached to an OP ⁇ with a surface matte treatment. Then, similarly to FIG. 1, the soft layer 2 and the silicone rubber composition are cured by heating while being pressed.
  • a laminated film obtained by laminating a commercially available matted OP II with a biaxially stretched PET film may be used as the protective film 4.
  • a laminated sheet having no protective film 4 in other words, a two-layer laminated sheet comprising a hard plastic layer 3 and a soft layer 2 is press-molded to form a membrane switch sheet 12 having a bulged portion 5.
  • no protective film 4 is required As the number of manufacturing steps is reduced, costs are also reduced.
  • a protective film that has not been subjected to a matting process may be used.
  • the protruding portion is harder to slide and has a better feel when the switch is pressed, as compared with the bulging portion 5 shown in FIG.
  • the silicone rubber layer may be partially cross-linked to the extent that it is difficult for the bulging portion 5 to flow during molding, and may be completely cross-linked after molding. In this case, the effect of reinforcing the flexibility of the hard plastic layer 3 by the silicone rubber layer is improved.
  • a material of the soft layer 2 for example, urethane rubber may be used.
  • the hard plastic layer 3 a material other than the PET film, for example, a polyethylene naphthalate film, a polyimide film, a polycarbonate film, or the like may be used.
  • a laminate film of a crystalline polyester film and another film may be used.
  • the arrangement of the bulging portions 5 may be appropriately changed according to the arrangement of the switches of the electric product to be used.
  • the shape of the bulging portion 5 is not limited to a circle, and may be changed to an appropriate shape such as an ellipse, a triangle, and a rectangle. Further, the size of the bulging portion 5 may be appropriately changed according to the design or purpose.
  • the present invention may be applied to a membrane switch having an electrode inside the hard plastic layer 3.

Landscapes

  • Push-Button Switches (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention porte sur un laminé comprenant une couche (2) souple, une première couche (3) de plastique dure et une seconde couche (4) de plastique dure. La couche (2) souple comporte deux surfaces : à l'une de ces surfaces est fixée la première couche (3) de plastique dure et, à l'autre surface, la seconde couche (4) de plastique dure est fixée de manière amovible.
PCT/JP2000/008217 1999-11-22 2000-11-21 Lamine et son procede de fabrication WO2001039227A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP33138699A JP3883764B2 (ja) 1999-11-22 1999-11-22 積層射出成形体及びその製造方法
JP11/331386 1999-11-22

Publications (1)

Publication Number Publication Date
WO2001039227A1 true WO2001039227A1 (fr) 2001-05-31

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Application Number Title Priority Date Filing Date
PCT/JP2000/008217 WO2001039227A1 (fr) 1999-11-22 2000-11-21 Lamine et son procede de fabrication

Country Status (5)

Country Link
JP (1) JP3883764B2 (fr)
KR (1) KR100480318B1 (fr)
CN (1) CN1168109C (fr)
TW (1) TW487632B (fr)
WO (1) WO2001039227A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5297101B2 (ja) * 2008-06-24 2013-09-25 東洋紡株式会社 樹脂複合体
JP5226411B2 (ja) * 2008-07-18 2013-07-03 東洋紡株式会社 表皮材用積層ポリエステルフィルムおよびこれを用いた触感が改善された複合成型体
JP5297180B2 (ja) * 2008-12-22 2013-09-25 東洋紡株式会社 表皮材用積層ポリエステルフィルムおよびこれを用いた触感が改善された複合成型体
TWI643224B (zh) * 2017-08-22 2018-12-01 達方電子股份有限公司 按鍵及包含該按鍵之鍵盤

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60167214A (ja) * 1984-02-09 1985-08-30 エスエムケイ株式会社 フラツトキ−ボ−ドスイツチとその製造方法
JPH03130199A (ja) * 1989-10-17 1991-06-03 Dainippon Printing Co Ltd ハードコート転写箔
JPH1044170A (ja) * 1996-08-07 1998-02-17 Toho Polymer Kk キートップ体の製造方法及びキートップ体

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60167214A (ja) * 1984-02-09 1985-08-30 エスエムケイ株式会社 フラツトキ−ボ−ドスイツチとその製造方法
JPH03130199A (ja) * 1989-10-17 1991-06-03 Dainippon Printing Co Ltd ハードコート転写箔
JPH1044170A (ja) * 1996-08-07 1998-02-17 Toho Polymer Kk キートップ体の製造方法及びキートップ体

Also Published As

Publication number Publication date
CN1168109C (zh) 2004-09-22
JP3883764B2 (ja) 2007-02-21
TW487632B (en) 2002-05-21
KR20020065528A (ko) 2002-08-13
KR100480318B1 (ko) 2005-04-07
JP2001150602A (ja) 2001-06-05
CN1391699A (zh) 2003-01-15

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