WO2006011461A1 - 衝撃吸収体、衝撃吸収積層構造体、液晶ディスプレイ用衝撃吸収積層構造体、プラズマディスプレイ用衝撃吸収積層構造体、有機エレクトロルミネセンスディスプレイ用衝撃吸収積層構造体及びディスプレイ装置 - Google Patents
衝撃吸収体、衝撃吸収積層構造体、液晶ディスプレイ用衝撃吸収積層構造体、プラズマディスプレイ用衝撃吸収積層構造体、有機エレクトロルミネセンスディスプレイ用衝撃吸収積層構造体及びディスプレイ装置 Download PDFInfo
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- WO2006011461A1 WO2006011461A1 PCT/JP2005/013606 JP2005013606W WO2006011461A1 WO 2006011461 A1 WO2006011461 A1 WO 2006011461A1 JP 2005013606 W JP2005013606 W JP 2005013606W WO 2006011461 A1 WO2006011461 A1 WO 2006011461A1
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- WIPO (PCT)
- Prior art keywords
- layer
- shock
- impact
- absorbing
- laminated structure
- Prior art date
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- WBHHMMIMDMUBKC-XLNAKTSKSA-N ricinelaidic acid Chemical compound CCCCCC[C@@H](O)C\C=C\CCCCCCCC(O)=O WBHHMMIMDMUBKC-XLNAKTSKSA-N 0.000 description 1
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- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 description 1
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- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- ZDHXKXAHOVTTAH-UHFFFAOYSA-N trichlorosilane Chemical compound Cl[SiH](Cl)Cl ZDHXKXAHOVTTAH-UHFFFAOYSA-N 0.000 description 1
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- YNPXMOHUBANPJB-UHFFFAOYSA-N zinc;butan-1-olate Chemical compound [Zn+2].CCCC[O-].CCCC[O-] YNPXMOHUBANPJB-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- 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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
-
- 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
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/022—Mechanical properties
-
- 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
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
- B32B17/10018—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising only one glass sheet
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- 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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/373—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by having a particular shape
- F16F1/3737—Planar, e.g. in sheet form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H5/00—Armour; Armour plates
- F41H5/02—Plate construction
- F41H5/04—Plate construction composed of more than one layer
- F41H5/0407—Transparent bullet-proof laminatesinformative reference: layered products essentially comprising glass in general B32B17/06, e.g. B32B17/10009; manufacture or composition of glass, e.g. joining glass to glass C03; permanent multiple-glazing windows, e.g. with spacing therebetween, E06B3/66
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/51—Elastic
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
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- 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
- B32B2419/00—Buildings or parts thereof
-
- 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
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
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- 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
- B32B2605/00—Vehicles
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/50—Protective arrangements
- G02F2201/503—Arrangements improving the resistance to shock
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
- H10K77/10—Substrates, e.g. flexible substrates
Definitions
- shock absorber shock-absorbing laminated structure
- shock-absorbing laminated structure for liquid crystal display shock-absorbing laminated structure for plasma display
- shock-absorbing laminated structure for organic electroluminescence display and display device
- the present invention relates to an impact absorber, an impact-absorbing laminate structure including the impact absorber, an impact-absorbing laminate structure for a liquid crystal display, an impact-absorbing laminate structure for a plasma display, and an impact for an organic electroluminescence display
- the present invention relates to a display device such as an absorption multilayer structure and a liquid crystal display (LCD), a plasma display, and an organic electroluminescence (organic EL) display provided with each shock absorption multilayer structure.
- the base layer such as a glass plate constituting a flat display panel typified by a liquid crystal panel needs to use a thin and non-alkali glass, so that the viscoelasticity is pressed or shaken. It is known that it breaks easily. Therefore, conventionally, when using flat display panels such as liquid crystal panels, plasma displays, and EL panels in portable devices, a transparent resin layer made of polycarbonate or acrylic is used to protect the display panels. Was.
- a display panel protective sheet is known in which an adhesive or the like is provided on one surface of a resin film and attached to the surface of the display panel.
- olefin-based thermoplastic elastomers are conventionally known as an elastomer constituting an elastomer film.
- a thermoplastic elastomer obtained by mixing olefin-based resin and olefin-based copolymer rubber, and olefin-based resin and olefin-based copolymer rubber are partially mixed with a crosslinking agent.
- Thermoplastic elastomers and the like that are crosslinked are known.
- Patent Document 3 discloses an olefin-based copolymer obtained by copolymerizing ethylene, ⁇ -olefin having 3 to 10 carbon atoms, an unsaturated monomer having a functional group, and, if necessary, non-conjugated gen.
- An oligomer comprising a random copolymer and a metal ion that crosslinks the olefin-based random copolymer.
- a fin-based thermoplastic elastomer is disclosed.
- the powerful olefin-based thermoplastic elastomer has the same rubber elasticity, flexibility and moldability as the conventional olefin-based thermoplastic elastomer, and also has good mechanical properties and wear resistance, especially scratch resistance. It has the effect of being excellent in attachment.
- Patent Document 4 discloses a soft composition containing a specific hydrogenated block copolymer and a liquid additive such as paraffinic process oil in a specific ratio. Further, it is described that the soft composition that can be produced is excellent in flexibility, low molecular retention, mechanical properties, hot melt adhesiveness and liquid retention. Furthermore, Patent Document 5 below shows that a low molecular weight material such as paraffin oil is held between a three-dimensional continuous network skeleton made of a specific thermoplastic block copolymer, and is a polymer network used for a cushioning material or the like. A structure is disclosed. Further, Patent Document 6 below discloses a rubber composition obtained by mixing a polymer network structure disclosed in Patent Document 5 below and a rubber material. It is disclosed that a strong rubber composition is a low-elasticity rubber composition in which a low-molecular material is uniformly dispersed and the low-molecular material is favorably retained and bleed of the low-molecular material is small.
- Patent Document 1 Japanese Patent Laid-Open No. 4 030120
- Patent Document 2 JP 2000-56694 A
- Patent Document 3 Japanese Patent Laid-Open No. 2003-82023
- Patent Document 4 Japanese Patent Laid-Open No. 9-263678
- Patent Document 5 JP-A-8-127698
- Patent Document 6 JP-A-8-127699
- the display panel protective sheet as shown in Patent Document 1 is mainly used for protection during transportation in a packaged state or for protection of a stationary display, and protection for a display panel for a mobile phone or the like. It was not made for. Further, the protective sheet for the display panel of Patent Document 2 can protect against impacts and pulling, but the device is put in the impact pockets and bottom pockets when it falls and collides with the floor. Sitting and holding There is no mention of the load when carrying it, such as being squeezed.
- the display panel can be made as thin as possible for the product use carried by the mobile phone or the like.
- the present invention has been made in view of the above circumstances, and an object thereof is to provide an impact absorber excellent in impact resistance.
- the present invention provides an impact-absorbing laminated structure that is excellent in impact resistance and can be made thinner by suppressing damage such as cracking and bubble stagnation without providing a gap between layers.
- Another object of the present invention is to provide a shock-absorbing laminated structure for LCD, a shock-absorbing laminated structure for plasma display, a shock-absorbing laminated structure for organic EL display, and a display device having the shock-absorbing laminated structure.
- the present invention is as follows.
- shock-absorbing laminated structure according to [7], wherein the shock-absorbing layer is an elastomer layer composed of a polar group-modified olefin polymer and a metal ion and Z or a metal compound.
- a shock-absorbing laminated structure characterized by comprising:
- shock-absorbing laminated structure wherein the shock-absorbing layer is an elastomer layer composed of a polar group-modified olefin polymer and a metal ion and Z or a metal compound.
- shock absorbing layer described in [1] above, and a shock provided on the shock surface side surface of the shock absorbing layer.
- An impact-absorbing laminated structure for a liquid crystal display comprising the impact-absorbing layer according to [4] above, and an impact layer provided on the impact surface side surface of the impact-absorbing layer, a plasma Shock-absorbing laminated structure for display or shock-absorbing laminated structure for organic EL display.
- a display device comprising the shock-absorbing laminated structure for liquid crystal display according to [17], the shock-absorbing laminated structure for plasma display, or the shock-absorbing laminated structure for organic EL display.
- a display device comprising the shock-absorbing laminated structure for liquid crystal display according to [18], the shock-absorbing laminated structure for plasma display, or the shock-absorbing laminated structure for organic EL display.
- the impact absorber of the present invention can suppress damage to the base layer and the like, and can prevent bubble stagnation, and exhibits excellent impact resistance.
- the shock-absorbing laminated structure of the present invention the shock-absorbing laminated structure for LCD, the shock-absorbing laminated structure for plasma display, and the shock-absorbing laminated structure for organic EL display are provided with the above-described structure, thereby providing excellent impact resistance. Play. Therefore, it is possible to prevent the base layer from being cracked or bubble stagnation due to impact or the like with a thinner thickness than conventional ones. Further, since a protective plate panel is provided as in the prior art, and there is no need to provide a gap between the protective plate panel and the base layer, the degree of freedom in designing the housing and the like can be increased.
- the display device of the present invention By providing the display device of the present invention with the above-described configuration, it is possible to prevent the base layer from being cracked or bubble stagnation due to impact or the like with a thinner thickness than conventional ones.
- FIG. 1 is a graph schematically showing the depth of a shock absorbing layer and changes in M300 or E ′.
- FIG. 2 is a schematic cross-sectional view of the shock absorber of this example.
- FIG. 3 is a schematic cross-sectional view for explaining an example of the shock-absorbing laminated structure of the present invention.
- FIG. 4 is a schematic cross-sectional view for explaining an example of the shock-absorbing laminated structure of the present invention.
- FIG. 5 is a schematic cross-sectional view for explaining an example of the shock-absorbing laminated structure of the present invention.
- FIG. 6 is a schematic cross-sectional view for explaining an example of the shock-absorbing laminated structure of the present invention.
- FIG. 7 is a schematic cross-sectional view for explaining an example of the shock-absorbing laminated structure of the present invention.
- FIG. 8 is a schematic diagram for explaining an impact resistance test of this example.
- shock absorber, B shock absorbing laminated structure, 1; shock absorbing layer, 1 '; impact surface, 1' '; counter impact surface, la; first shock absorbing layer, lb; Shock absorbing layer, 11; low elastic modulus layer, 12; high elastic modulus layer, 13; medium elastic modulus layer, 2; base layer, 3; impact layer, 4; functional layer, 4a; second functional layer, 5; other Layer, 61; silicone rubber thin plate, 62; base, 7; iron ball.
- the first shock absorber of the present invention has a multilayer structure in which n layers (n; an integer greater than or equal to 2) are stacked, and has an impact surface side force mth (m; 2 to n). 300% modulus of the layer vs. impact surface It is characterized by having an impact absorbing layer larger than the 300% modulus of the (m-1) th layer from the surface side.
- the second shock absorber of the present invention has a multilayer structure in which n layers (n; an integer of 2 or more) are stacked, and m-th (m; 2 to n) from the impact surface side. ) Layer has a storage elastic modulus larger than that of the (m ⁇ 1) th layer from the impact surface side, and has a shock absorbing layer.
- the “impact surface” is a surface on which a shock is applied, and the “anti-impact surface” is the above “impact surface”. Means the opposite side.
- the surface on the high elastic modulus layer 12 side of the shock absorbing layer 1 is the “impact surface” 1 ′, and the surface on the low elastic modulus layer 1 1 side is the above “impact surface” 1,. is there.
- the shock absorbing layer constituting the shock absorber of the present invention has a multilayer structure in which n layers (n; an integer of 2 or more) are laminated.
- n is usually 2 or more, and can be 3 or more, or 4 or more as necessary.
- the shock absorbing layer includes a high elastic modulus layer 12 composed of a high elastic film, and a 300% module than the high elastic modulus layer 12.
- a two-layer structure including a low elastic modulus layer 11 composed of a low elastic film having a small dura (hereinafter referred to as “M300”) or a storage elastic modulus (hereinafter referred to as “E ′”) may be employed. Further, as shown in FIG.
- a high elastic modulus layer 12 composed of a high elastic modulus film
- a medium elastic modulus composed of a medium elastic film whose M300 or E ′ is smaller than the high elastic modulus layer 12
- a three-layer structure comprising a layer 13 and a low elastic modulus layer 11 having a smaller M300 or E ′ than the medium elastic modulus layer 13 and made of a low elastic film can be obtained.
- the M300 (MPa) and the E '(MPa) of each layer constituting the shock absorbing layer are both indices of elastic modulus.
- E ′ of each layer constituting the shock absorbing layer is 1 ⁇ 10 2 MPa or less
- M300 is used as an index of elastic modulus
- E ′ Is an index of elastic modulus.
- E ' is used as an elastic modulus index only when the elongation at break of the material is small and M300 cannot be measured.
- the magnitude of the elastic modulus is the magnitude of the values of M300 and E ′.
- the above-mentioned M300 is a stress value at a strain of 300% in a tensile measurement with a temperature of 25 ° C, a tensile speed of 500 mmZmin, and a JIS No. 3 dumbbell test piece.
- the above E ′ is a value measured by dynamic viscoelasticity measurement at a temperature of 25 ° C., an applied frequency of 1 ⁇ , an applied strain of 0.1%, and a tensile mode.
- fine particles with a particle size of 1 to LOONm such as metals such as gold, nickel and zinc, and oxides of these metals, and polymer cross-linked particles such as cross-linked products of polystyrene and dibutenebenzene.
- the degree of cross-linking of the polymer constituting the shock absorbing layer by ultraviolet ray or electron beam irradiation or a cross-linking agent.
- the degree of crosslinking is increased by irradiation with ultraviolet rays, electron beams or a crosslinking agent, the M300 and the E ′ can be increased.
- the M300 and the E ′ of each layer constituting the shock absorbing layer may be uniform in the layer, but the M300 and the E as they move from the impact surface side toward the impact surface side. ' May be changed.
- the M300 and the E ′ in the layer can be continuously decreased from the impact surface side toward the impact surface side.
- the layer having such a structure is, for example, (1) by using the property that the degree of crosslinking becomes higher at a position where the irradiation surface force is shallower, the impact absorbing layer is irradiated with ultraviolet rays or electron beams, Surface side rack Reduce the degree of cross-linking on the impact surface side, which increases the degree of bridging, or (2) use the property that the concentration of the cross-linking agent increases as the depth from the coated surface decreases. It can be obtained by applying a cross-linking agent, which will be described later, to the surface as appropriate so as to increase the degree of crosslinking on the impact surface side and lower the degree of crosslinking on the impact surface side.
- the shock absorbing layer has a multilayer structure in which n layers (n; an integer of 2 or more) are laminated, and the force on the impact surface side is that of the mth layer ( m ; 2 to n).
- M300 or E ' is larger than M300 or E' of the (m-1) th layer from the impact surface side.
- the above-mentioned shock absorbing layer satisfies the above requirements even if m is any of 2 to n.
- FIG. 1 is a graph showing changes in M 300 or E ′ of the shock absorbing layer having a three-layer structure shown in FIG. 2 (B).
- the M300 or E 'of the layer on the impact surface side is larger than the M300 or E' of the layer on the impact surface side.
- the impact surface side force also decreases toward the impact surface side according to the direction force.
- the force with which the change of M300 or E ′ is discontinuous is changed as described above, and M300 or E ′ of each layer constituting the shock absorbing layer is changed, and M300 or E ′ on the impact surface side is changed.
- the impact-absorbing layer constituting the impact-absorbing body of the present invention has a higher physical modulus toward the impact surface side, and has special physical properties when the elastic modulus decreases continuously toward the impact surface side.
- M300 and E ' the higher the ability to diffuse stress during impact and the higher the fracture strength.
- M300, E force, the higher the shock absorption capacity.
- void formation bubble stagnation due to material destruction of the shock absorbing layer due to stress concentration at the time of impact is unlikely to occur. Therefore, the shock cannot be absorbed at the time of impact, and the impact is transmitted to the base layer. As a result, the base layer is easily damaged.
- shock absorbing layer can absorb the shock sufficiently at the time of impact and suppress the transmission of the shock to the base layer, while preventing damage to the base layer. Since the ability to diffuse stress at the time is low, the stress is concentrated at the time of impact, and the fracture strength is also low. .
- the shock absorber of the present invention is configured. Since the shock absorbing layer has the above-described configuration, when an impact is applied to the impact surface side, stress can be diffused in the vicinity of the impact surface, and damage to the base layer can be prevented.
- the shock absorbing layer constituting the shock absorber of the present invention has a high breaking strength of the shock absorbing layer in the vicinity of the impact surface, and can prevent bubble stagnation by diffusing the stress of the shock. .
- the elastic modulus decreases continuously as the impact surface side decreases and the elastic modulus increases continuously as the force is applied to the impact surface side. Since the stress of impact cannot be diffused, and the fracture strength of the impact absorbing layer is low, it is not preferable because bubble stagnation easily occurs and the base layer is easily damaged.
- the outermost layer M300 on the impact surface side is usually 2 MPa or more, preferably 5 MPa or more, more preferably lOMPa or more.
- E ′ of the outermost layer on the impact surface side is usually IMPa or more, preferably lOMPa or more, more preferably lOOMPa or more.
- M300 of the outermost layer on the impact surface side is usually less than 5 MPa, preferably 3 MPa or less, more preferably 2.5 MPa or less.
- E ′ of the outermost layer on the impact surface side is usually 30 MPa or less, preferably 20 MPa or less, and more preferably lOMPa or less.
- the ratio of the outermost layer M300 on the impact surface side of the shock absorbing layer to the outermost layer M300 on the impact surface side Is usually larger than 1, preferably 1.5 or more, more preferably 2 or more, more preferably 4 or more, particularly preferably 5 or more, and most preferably 5 to 10.
- the ratio of the outermost layer E 'on the impact surface side of the shock absorbing layer to the outermost layer E' on the impact surface side Is usually larger than 1, preferably 50 or more, more preferably 100 or more, more preferably 400 or more, and particularly preferably 500 to 1000.
- the thickness of each of the layers constituting the shock absorbing layer is not particularly limited, and various thicknesses can be used as necessary.
- the thickness of each layer can be the same regardless of the size of the elastic modulus, or the layer with a higher elastic modulus can be made thinner with a thinner layer with a lower elastic modulus. It is preferable to increase the thickness.
- the ratio of the thickness of the outermost layer on the impact surface side, which has low elasticity, to the thickness of the outermost layer on the impact surface side, which has high elasticity (thickness of the outermost layer on the impact surface side ⁇ (Thickness of outermost layer) Lower, preferably 1.5-7, more preferably 2-5.
- the thickness ratio between the low elastic modulus layer 11 and the high elastic modulus layer 12 (the thickness Z of the low elastic modulus layer 11 is high
- the thickness of the elastic modulus layer 12 can be in the above range.
- the shock absorber of the present invention may be opaque because it can be applied to applications other than display members such as display panels, but when used for display members such as display panels, It is desirable to be transparent.
- the total light transmittance is preferably 90% or more, particularly 91% or more, more preferably 92% or more under the conditions of 25 ° C. and 0.5 mm thickness.
- the impact absorbing layer can have excellent transparency in a wide temperature range.
- the impact absorbing layer is transparent at 100 to 90 ° C, preferably 50 to 90 ° C, more preferably -40 to 90 ° C (total light transmittance at a thickness of 0.5 mm is 90%). Or more, preferably 91% or more, more preferably 92% or more).
- the said total light transmittance shows the value measured by the method of an Example description.
- the material, shape, physical properties and structure of the shock absorbing layer There is no particular limitation! ⁇ .
- the impact-absorbing layer may be a solid material such as a sheet or film, or may be a gel or a sealed liquid.
- the physical properties and materials other than the elastic modulus of each layer constituting the shock absorbing layer may be the same or different. For example, if the refractive index of each layer constituting the shock absorbing layer is approximately the same (usually within ⁇ 10%, preferably within ⁇ 5%, more preferably within ⁇ 3%), the visibility of the display panel is improved. Preferable because it can improve.
- the material of the shock absorbing layer may be, for example, an elastomer (including oil-extended rubber) or a resin, but an elastomer is particularly preferred.
- Examples of the elastomer include, for example, a block (co) polymer of conjugated gen, a block copolymer of an aromatic beryl compound and a conjugated gen, and a hydrogen addition of a block (co) polymer of conjugated gen.
- Hydrogenated block copolymer of aromatic bur compound and conjugated gen ethylene'a 1-year-old olefin copolymer, polar group modified olefin copolymer, polar group modified olefin copolymer Elastomers composed of metal ions and Z or metal compounds, acryl-tolyl, butadiene rubber, etc., tolyl rubber, butyl rubber, acrylic rubber, Heat of thermoplastic polyolefin elastomer (TPO), thermoplastic polyurethane elastomer (TPU), thermoplastic polyester elastomer (TPEE), polyamide elastomer (TPAE), Gen-based elastomer (1, 2-polybutadiene, etc.) Examples thereof include plastic elastomers, silicone elastomers, and fluorine elastomers.
- TPO thermoplastic polyolefin elastomer
- TPU thermoplastic polyurethane elastomer
- TPEE thermoplastic polyester elastomer
- conjugates examples include 1,3-butadiene, isoprene, 2,3-dimethyl-1,3-butadiene, 1,3-pentagen, 2-methyl-1,3-pentagen, 1,3-hexadiene, 4 , 5-Jetyl 1, 3-octoctene, black mouth plain and the like. Of these, 1,3-butadiene, isoprene and 1,3-pentagen are preferred, and 1,3-butadiene and isoprene are particularly preferred.
- the compounds exemplified above can be used singly or in combination of two or more.
- block (co) polymers using this conjugated diene include butadiene block copolymers and butadiene 'isoprene' butadiene block copolymers.
- Examples of the aromatic bur compound include styrene, t-butyl styrene, ⁇ -methyl styrene, a-chloro styrene, p-methyl styrene, dibutyl benzene, N, N-jetyl-P-amino styrene, and the like.
- the compounds exemplified above can be used singly or in combination of two or more.
- block copolymer using this aromatic vinyl compound and conjugated diene examples include styrene 'butadiene' styrene block copolymer (SBS), styrene 'isoprene' styrene block copolymer, and the like.
- SBS styrene 'butadiene' styrene block copolymer
- styrene 'isoprene' styrene block copolymer examples include styrene 'butadiene' styrene block copolymer (SBS), styrene 'isoprene' styrene block copolymer, and the like.
- a hydrogenated product of a block (co) polymer of a conjugated gen a hydrogenated product of a block copolymer of an aromatic belief compound and a conjugated gen. It may be. In the former case, it is preferable to use a hydrogenated product of the following block polymer as the block copolymer.
- the content of the bull bond (1, 2-bond) is preferably less than 25%, more preferably 5 to 20%, still more preferably 7 to 19%. It is. Accordingly, the butadiene polymer block (I) becomes a crystalline block having a structure similar to that of an ethylene / butene copolymer by hydrogenation. By setting the vinyl bond content within the above range, the mechanical properties and shape retention of the molded product can be improved.
- the polymer block ( ⁇ ⁇ ) may be a block that only has a conjugated gen unit, or a block that includes a conjugated gen unit (al) and another monomer unit (a2).
- the mass ratio (al) / (a2) of the conjugation unit (al) and the other monomer unit (a2) is preferably (100-50) Z (0-50), more preferably (100 ⁇ 70) Z (0-30), more preferably (100-90) Z (0-10). By setting it as such a range, the molded object excellent in viscoelasticity can be obtained.
- the content of vinyl bonds (1,2-bonds and 3,4-bonds) is preferably 25 to 95%, more preferably 25 to 90%, still more preferably 30-85%.
- butadiene polymer block (I) "eight 1" if the polymer block (II) is set to "", (A 1 - B 1) , ( A 1 — B 1 ) -A ⁇ (B 1 — A 1 ) — B 1 etc.
- ml to m3 represent an integer of 1 or more.
- ml is preferably an integer of 2 or more.
- the polymer (P) includes the butadiene polymer block (I) and the polymer block.
- each of which has at least one (II) in the molecule other than these, for example, a polymer having other monomer units other than conjugation units. Also good.
- the butadiene polymer block (I) constituting the polymer (P) and the polymer pro ( ⁇ ) ⁇ ⁇ ( ⁇ ) is preferably (5 to 60) 7 (95 to 40), more preferably (7 to 60) 7 (93 to 40), more preferably (8-50) 7 (92-50).
- Examples of the coupling agent include 1,2-dibromoethane, methyldichlorosilane, trichlorosilane, methyltrichlorosilane, tetrachlorosilane, tetramethoxysilane, divinylbenzene, jetyl adipate, dioctyl adipate, and benzene 1,2,4 triisocyanate.
- Hydrogenation of the polymer ( ⁇ ) is performed on the olefinic unsaturated bond in the block, and the hydrogenation rate is preferably 80% or more, more preferably 85% or more, and particularly preferably 90%. By making it higher than the above, it is possible to improve the shape-retaining property and mechanical properties when a molded product is formed from the resulting hydrogenated product.
- the above polymer ( ⁇ ⁇ ) can be hydrogenated by, for example, a method disclosed in JP 2-133406 A, JP 3-128957 A, JP 5-170844 A, etc. .
- the ethylene 'a-olefin copolymer is not particularly limited as long as it is a copolymer of ethylene and a-olefin exemplified below, and may be ethylene' a-olefin 'non-conjugated gen copolymer or the like. .
- alpha-Orefuin in the ethylene 'a- Orefuin copolymer ⁇ beauty ethylene.
- a Orefuin' non-conjugated diene copolymer is assumed to be a- Orefuin except E Ji Ren.
- This a-olefin includes propylene, 1-butene, 1-pentene, 3-methyl 1-butene, 1-hexene, 3-methyl 1-pentene, 4-methyl-1 pentene, 3 ethyl 1 pentene, 1-otaten, 1 decene, 1-undecene, etc. It is done. Of these, ⁇ -olefins having 3 to 12 carbon atoms are preferred, and propylene and 1-butene are particularly preferred.
- the ⁇ -olefins exemplified above can be used singly or in combination of two or more.
- an ethylene / propylene copolymer and an ethylene / 1-butene copolymer are preferable.
- the ethylene ′ (X-olefin copolymers exemplified above can be used singly or in combination of two or more.
- the above non-conjugated genes include 1,4 pentagen, 1,4 monohexagen, 1,5 hexagen, 1 , 7-octadiene, 1,9-decadiene, 3, 6 dimethyl-1, 7-octadiene, 4, 5— dimethyl-1, 7-octadiene, 5-methyl-1,8 nonagen, dicyclopentagen, 5 ethylidene-2 norbornene, 5 Bull—2 norbornene, 2, 5 norbornagen, etc. These can be used alone or in combination of two or more.
- Examples of the ethylene 'a-olefin' nonconjugated conjugated copolymers include ethylene 'propylene dicyclopentaene copolymer, ethylene propylene' 5 -ethylidene 2 norbornene copolymer, ethylene 1-butene 'dicyclopenta. Examples thereof include a copolymer of ethylene, an ethylene / 1-butene / 5ethylidene-2-norbornene copolymer, and the like. These can be used alone or in combination of two or more.
- ethylene 'a-olefin copolymer and ethylene' a-olefin-non-conjugated gen copolymer are used singly or in combination of two or more. It can be done.
- the ethylene 'a-olefin-copolymer and the ethylene' a-olefin-non-conjugated gen copolymer are carboxyl group, hydroxyl group, epoxy group, amino group, alkoxysilyl group, sulfonic acid group, nitrile. It may be a polar group-modified polyolefin-based copolymer having a polar group such as a group. That is, the polar group-modified olefin-based copolymer is a polymer containing a monomer unit composed of another monomer (a) in the polymer. The other monomer (a) is preferably an unsaturated compound having the above functional group.
- Such unsaturated compounds can be used singly or in combination of two or more.
- the amount of the non-saturation compounds, when the monomer units of polar group modified Orefin based copolymer was 100 molar%, preferably 0.01 to 20 mol 0/0, more preferably Is 0.1 to 10 mol%.
- the proportion of the unsaturated compound used is 0.01 mol% or more, the crosslink density of the resulting molded product can be increased, and as a result, the mechanical strength and heat resistance of the molded product can be improved. preferable.
- the use ratio of the unsaturated compound having the functional group is 20 mol% or less, the crosslinking density becomes too high, so that the hardness is too high and brittle V and a molded product can be suppressed. So preferred.
- the unsaturated compound having a carboxyl group maleic anhydride, (meth) acrylic acid, a cyclic compound represented by the following general formula (1), and the like can be used.
- R 1 is a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms
- ⁇ 2 and ⁇ 3 are independently a hydrogen atom and a carbon atom having 1 to 10 carbon atoms.
- a hydrogen group or COOH When at least one of ⁇ 2 and ⁇ 3 is COOH, and when two or more of ⁇ 1 , ⁇ 2 and ⁇ 3 are COOH, they are acid anhydrides ( (1) CO— (O) CO 2).
- o is an integer from 0 to 2 and p is It is an integer from 0 to 5.
- Examples of the cyclic compound include 5, 6 dimethyl-5, 6 dicarboxybicyclo [2. 2.
- the amount of the case of using the compound represented by the above general formula (1) is to total monomer, preferably ⁇ or 0.01 to 5 Monore 0/0, more preferably ⁇ or 0. 01-4 Monore 0/0.
- the general formula (1) compound represented by the co-polymerization was ethylene 'a one year old Refuin copolymer or ethylene alpha -.
- Orefuin' non-conjugated diene copolymer is preferably a random copolymer der Rukoto .
- the weight average molecular weight Mw in terms of polystyrene by GPC of the random copolymer obtained by copolymerization is preferably 1,000 to 3,000,000, more preferably ⁇ 3,000 to 1,000. , 000, more preferred ⁇ is 5,000-700,000.
- a metal An ion, a metal compound, or the like can be used.
- This metal ion also means an ion of an element exemplified below and an ion of a metal compound containing this element.
- These metals include lithium, sodium, potassium, aluminum, magnesium, calcium, norium, cesium, strontium, rubidium, titanium, zinc, copper, iron, tin, lead, zirconium, etc. Examples include elements of groups 1A to 5B.
- the ions containing these elements can form a crosslinked structure between the copolymers by ionic bonds to the functional groups in the random copolymer obtained above or by electrostatic bonds.
- the substance for forming ions of the metal compound include oxides, hydroxides, salts, complexes, and organic compounds containing metal elements.
- Metal oxides such as O, LiOH ⁇ NaOH ⁇ KOH, Cu (OH), Cu O (OH), Mg (OH)
- the organic compound containing a metal element may be any metal compound having an organic group.
- a compound having a metal-carbon bond a compound having a heteroatom (oxygen etc.) bond in one metal organic group.
- metal salts and complexes of organic compounds are also included.
- Specific examples of the organic compound having the above metal element include, for example, metal alkoxides, alkylalkoxy metal compounds [alkyl (ethyl etc.) trialkoxy metal compounds, dialkyl (ethyl etc.) dialkoxy metal compounds, trialkyl (ethyl). Etc.) Alkoxy metal compounds], metal carboxylates, metal acetyl cetates and the like.
- the number of carbon atoms of the alkoxide constituting the metal alkoxide is usually 1-8, preferably 1-6, more preferably 1-4, and more specifically, for example, methoxide, ethoxide, propoxide, butoxide, etc. Are listed. More specifically, examples of the organic compound having the metal element include, for example, zirconum butoxide [Zr (OBu)], titanium butoxide [Ti (OBu)], aluminum butoxy.
- the amount of the substance used for forming the ion was formed from the cyclic compound constituting the copolymer obtained by using the cyclic compound represented by the general formula (1).
- the amount is preferably 0.01 to 50 equivalents, more preferably 0.05 to 10 equivalents, and particularly preferably 0.1 to 5 equivalents per 1 equivalent of the unit. If the amount of the substance used for forming the ions is too small, the resulting molded product tends to be inferior in mechanical strength and heat resistance with a low crosslinking density. On the other hand, if the amount used is too large, the resulting molded article has a high crosslink density and is too brittle and may become brittle.
- a metal salt of an organic acid such as a carboxylic acid may be added as an activator.
- the metal salt of the carboxylic acid it is preferable to use a metal salt of a monovalent carboxylic acid having 3 to 23 carbon atoms! /.
- the metal element in the metal salt used as the activator may be selected from the metal elements constituting the substance for forming the ion, but the same kind as the metal element constituting the substance for forming the ion. It is preferable to use a metal salt containing an element.
- butyl rubber examples include a copolymer of isobutylene and isoprene, a copolymer of isobutylene, isoprene, and a polar group-containing monomer, and a partially crosslinked copolymer thereof.
- the polar group-containing monomer includes at least one of a hydroxyl group, an epoxy group, an amino group, a carboxyl group, an alkoxysilyl group, and a -tolyl group. Mention may be made of monomers having one species.
- the partially crosslinked copolymer is obtained by copolymerizing a monomer containing a polyfunctional unsaturated bond with these monomers.
- aryl compounds polyvalent (meth) ataretoy compounds, divinyl compounds, bismaleimide compounds, dioxime compounds and the like.
- butyl rubber examples include isobutylene isoprene copolymer.
- the copolymer may be a halogenated chlorine isobutylene 'isoprene copolymer, bromine isobutylene' isoprene copolymer, or the like.
- the acrylic rubber is a rubber polymerized or copolymerized using at least an alkyl acrylate ester.
- an alkyl vinyl ether in addition to the alkyl acrylate ester, an alkyl vinyl ether, a copolymerizable monomer having a polar group, and other monomers can be used.
- an alkyl butyl ether is used. One of these may be used, or two or more may be used in combination.
- these partially crosslinked copolymers It may be rubber.
- alkyl acrylate ester examples include ethyl acrylate, propyl acrylate, and butyl acrylate.
- alkyl butyl ether examples include chloromethyl butyl ether and chloroethyl butyl ether.
- alkoxyalkyl acrylates such as methoxymethyl acrylate, ethoxymethyl acrylate, methoxyethyl acrylate and ethoxyethyl acrylate can improve the cold resistance of acrylic rubber, Ethylene or the like can also be used.
- a polyfunctional unsaturated bond-containing monomer capable of obtaining a partially crosslinked copolymer rubber by copolymerization with each monomer can be exemplified.
- this polyfunctional unsaturated bond-containing monomer the above-mentioned polyfunctional unsaturated bond-containing monomer in the description of the butyl rubber can be applied.
- hydrogenated products of block (co) polymers of conjugation, and elastomers composed of polar group-modified olefin-based copolymers and metal ions and Z or metal compounds are preferred.
- the above liquid material at 40 ° C If the kinematic viscosity is in the above range, it is preferable because the shape can be maintained over a wide temperature range. More specifically, for example, as the liquid material, a kinematic viscosity at 40 ° C. is 800 mm 2 Zs or less, and a non-volatile liquid material at ⁇ 100 to 50 ° C. is preferable. Furthermore, from the viewpoint of use in a low-temperature environment, the above liquid material has a pour point of ⁇ 10 ° C. or less, particularly ⁇ 20 ° C. or less, further ⁇ 40 ° C.
- the softener may be one of petroleum softeners such as paraffin-based process oils, mineral oil softeners such as ethylene a-olefin co-oligomer and gilsonite, fatty acids such as oleic acid and ricinoleic acid, or the like.
- the liquid oligomer include one or more of polyisobutylene, various liquid rubbers (such as polybutadiene and styrene / butadiene rubber), and silicone oil.
- the liquid material may be two types, such as paraffinic process oil, norafin synthetic oil, hydrogenated paraffinic oil, etc.
- Molded products with excellent weather resistance when using one or more oils with no heavy bonds or few components with double bonds (specifically, 20% by mass or less, more specifically 10% by mass or less) Therefore, it is preferable.
- the above liquid materials may be used alone or in combination of two or more.
- the amount used is preferably 50 to 5000 parts by mass, more preferably 50 to 4000 parts by mass when the total amount of the polymer contained in the elastomer is 100 parts by mass. More preferably, it is 50 to 3000 parts by weight, more preferably 50 to 2000 parts by weight, most preferably 60 to 1800 parts by weight.
- the blending amount of the above liquid material is not 50 parts by mass If it is full, a molded article having desired impact resistance may not be obtained. On the other hand, when the blending amount of the liquid material exceeds 5000 parts by mass, the liquid material may ooze out in terms of the compact strength, and it may be difficult to maintain the shape.
- the method for obtaining the elastomer containing the liquid material is not particularly limited.
- the elastomer component and the liquid material may be added by adding other components as necessary and mixed by an appropriate method. Further, the elastomer may be mixed under the conditions that can form a three-dimensional skeleton.
- the mixture can be prepared by stirring under shearing at a rotational speed of 10 rpm or higher, preferably 30 rpm or higher.
- crosslinking When crosslinking is performed using a crosslinking agent, layers having different degrees of crosslinking can be formed by changing the type and amount of the crosslinking agent.
- different layers of M300 and E ′ can be formed by changing the amount of liquid material used regardless of the presence or absence of crosslinking.
- an elastomer comprising a polar group-modified olefin-based copolymer and a metal ion and Z or a metal compound
- it can be adjusted depending on the amount of the liquid material used.
- different layers of M300 and E ′ can be formed by changing the amount of metal compound used.
- the polar group-modified olefin-based copolymer has a polar group-containing unsaturated compound such as a carboxyl group, a hydroxyl group, an epoxy group, an amino group, an alkoxysilyl group, a sulfonic acid group, or a nitrile group (the above general
- the above metal ion and Z or metal compound are preferably 0.01 to 50 equivalents, more preferably 0.05 to 10 equivalents per unit equivalent of a unit formed from a cyclic compound represented by the formula (1))
- a shock absorbing layer having a layer L1 of 0.1 to 5 equivalents is used, and the layer L2 adjacent to the layer L1 is used for the amount of metal ions and Z or metal compound used in the layer L1.
- the amount used preferably 10-90%, more Preferably, it is formed as 15 to 85%, more preferably 20 to 80%.
- the same ratio is applied to the case where they are adjacent to each other.
- an impact absorbing layer having a layer L1 ′ comprising preferably 50 to 5000 parts by mass of the liquid material with respect to 100 parts by mass of the hydrogenated product, and L2 ′ adjacent to the layer L1 ′ is
- the liquid material is used in an amount of 10 to 90%, more preferably 15 to 85%, and still more preferably 20 to 80% of the amount used in the case of the layer L1 ′.
- the same ratio is applied to the case where they are further adjacent.
- the shock absorbing layer may be cross-linked, or may be made of an elastomer, and at least partially cross-linked.
- An elastomer may be used.
- the elastomer is an elastomer including the polar group-modified polyolefin copolymer
- the polar group-modified olefin copolymer is used in addition to crosslinking with the metal ion and Z or a metal compound via the polar group.
- Other crosslinks may be formed on at least a part of the body.
- the method for crosslinking is not particularly limited. Examples include electron beam irradiation, ultraviolet irradiation, and method power using a crosslinking agent (for example, an organic peroxide).
- a crosslinking agent for example, an organic peroxide
- the resin examples include 1,2-polybutadiene resin, ethylene'vinyl acetate copolymer (EVA, usually containing 3% by mass or more of butyl acetate units), and polyethylene.
- EVA ethylene'vinyl acetate copolymer
- soft resins such as polyethylene resin and polysalt resin resin are preferred.
- the method for obtaining the shock absorbing layer is not particularly limited. Normally, shock absorbers with M300 or E 'larger than this shock absorber are laminated on the impact surface side surface of a shock absorber having a specific M300 or E', and the same lamination is performed as necessary. repeat. Of course, on the contrary, a shock absorbing material having a smaller M300 or E ′ than that of the shock absorbing material is laminated on the surface of the shock absorbing material having a specific M300 or E ′. The same lamination may be repeated accordingly.
- the “lamination” means a liquid material such as a solution dissolved in a solvent and a melt melted by heating or the like, or a heating or the like only when a complete solid layer is stacked on the surface of a certain layer. This includes a case where the semi-solid material that has become a gel or semi-solid is placed by means such as coating, and then made into a solid form by cooling or the like.
- the above-mentioned lamination method is carried out by laminating the high elastic modulus layer 12 on the impact surface side surface of the low elastic modulus layer 11 and bonding them together with an adhesive. Or the method of joining using an adhesive is mentioned.
- Other methods for laminating the high modulus layer 12 include a coating method, a casting method, a pressing method, an extrusion method, an injection molding method or an inflation method. Methods and the like.
- the high elastic modulus layer 12 is laminated on the impact surface side surface of the low elastic modulus layer 11.
- the low elastic modulus layer 11 is laminated on the impact surface side of the high elastic modulus layer 12. Applicable also when laminating on the surface.
- direct bonding is performed using a press roll or the like while applying pressure by a hot press or a cold press (including a case of simply pressing and bonding).
- a hot press or a cold press including a case of simply pressing and bonding
- it may be joined directly by pressure alone, without using an adhesive or a pressure sensitive adhesive.
- the high elastic modulus layer 12 that is in a semi-cured state is extruded by heating, or supplied to the surface of the low elastic modulus layer 11 with a doctor blade. Then, the film can be laminated by pressing with a roller or the like and then cooling.
- the low elastic modulus layer is flexible and has adhesiveness, it may be crimped without heating, but it is preferably crimped with heating.
- a mixed solution is prepared by dissolving or dispersing the components constituting the high elastic modulus layer 12 in a solvent, and the mixed solution is
- the high elastic modulus layer 12 is formed on at least one surface of the low elastic modulus layer 11 by applying to the impact surface side surface of the low elastic modulus layer 11 formed by an arbitrary method, or (2)
- the low elastic modulus layer 12 is applied to the impact surface side surface of the low elastic modulus layer 11 by applying the high elastic modulus layer 12 which has become liquid or semi-solid by heating or dissolving in a solvent or the like.
- the high elastic modulus layer 12 is formed on the impact surface side surface of 11.
- the application method include application by a coater coater, solvent casting method, spin coating method, and the like.
- the high elastic modulus layer 12 can be laminated by removing the solvent or drying, if necessary.
- the method for removing the solvent is not particularly limited. For example, it can be removed by a known method such as heating, decompression, steam distillation or the like.
- the extrusion method is not particularly limited as long as it is a conventionally known extrusion method. Specifically, for example, it can be formed by a T-die extrusion method. That is, the components constituting the high elastic modulus layer 12 are added and melted in a cylinder, and the melt is transferred to a T die and molded by an extrusion method in which the low elastic modulus layer 11 is extruded onto the impact surface side surface. can do.
- the liquid containing the component constituting the high modulus layer 12 may or may not contain a solvent. When a solvent is included, it is preferable to heat in the above cylinder and distill off the solvent with a vent opening.
- the shape, thickness and other physical properties of the shock absorber of the present invention are not particularly limited.
- the shape of the shock absorber of the present invention examples include a sheet shape and a film shape.
- the total thickness of each of the shock absorbing layers constituting the shock absorber of the present invention is usually 0.1 to 2 mm, preferably 0.2 to 0.8 mm, more preferably 0.3 to 0. It is 5mm.
- the impact absorber of the present invention may be opaque, but when used on a display surface of a display panel or the like, it is preferable that the impact absorber is transparent from the viewpoint of the visibility of the display content of the display panel.
- the total light transmittance is 90% or more, preferably 91% or more, more preferably 92% or more under the conditions of 25 ° C. and 0.5 mm thickness.
- the shock absorber of the present invention may contain other components as necessary, as long as the effects of the present invention are not impaired.
- Other components include pigments, dyes, lubricants, softeners, photosensitizers, antioxidants, antioxidants, heat stabilizers and other stabilizers, weathering agents, metal deactivators, UV absorbers, light Stabilizers, stabilizers such as copper damage inhibitors, antibacterial and antifungal agents, dispersants, plasticizers, crystal nucleating agents, flame retardants, tackifiers, foaming aids, crosslinking agents, co-crosslinking agents, vulcanizing agents , Vulcanization aid, foaming agent, colorant such as titanium oxide and carbon black, metal powder such as ferrite, inorganic fiber such as glass fiber and metal fiber, organic fiber such as carbon fiber and aramid fiber, composite fiber, titanium Inorganic whiskers such as potassium acid whisker, glass beads, glass balloons, glass flakes, asbestos, my strength, calcium carbonate,
- the shock absorber of the present invention is not particularly limited as long as it has the shock absorbing layer.
- a peelable protective film layer can be provided on at least one surface of the shock absorbing layer.
- the protective film layer can be peeled off and attached to the surface of other adherends. A structure provided with the shock absorber of the present invention can be obtained.
- the protective film layer may be made of polyester such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), polybutyl alcohol, polyamide, polyimide, polyolefin, polycarbonate, acrylic resin, and fluorine resin.
- the resin include a resin and a resin impregnated paper obtained by impregnating paper with a resin.
- the protective film layer may be transparent or not transparent.
- the shape of the protective film layer may be a sheet shape or a film shape. Further, the protective film layer may have a single layer structure, or may be a laminate of two or more layers of the same material or different materials.
- examples of the laminated body include a laminated body in which a rubber film is laminated on at least one surface of the base film described in Patent Document 5 above.
- protective film layers having different materials, shapes or structures may be used even if the protective film layers have the same material, shape and structure. You may use together.
- the protective film layer may be provided on at least one surface of the shock absorbing layer. That is, it may be provided only on one surface of the shock absorbing layer, or may be provided on both surfaces of the shock absorbing layer. Further, the thickness of the protective film layer is not particularly limited. The thickness of the protective film layer is usually 200 m or less, preferably 150 / z m or less, more preferably 100 m or less, and particularly preferably 20 to: LOO / z m.
- the method for producing the shock absorber of the present invention having the protective film layer there is no particular limitation on the method for producing the shock absorber of the present invention having the protective film layer.
- a method of providing the protective film layer on the surface of the shock absorbing layer for example, Examples include bonding using an adhesive (or pressure-sensitive adhesive) and direct bonding using a hot press and a cold press (including a case where bonding is performed simply by pressing).
- Other examples include casting methods (solvent-free casting method and solvent casting method), extrusion methods, press molding methods, injection molding methods, casting methods, and the like.
- the shock absorber of the present invention having the protective film layer is formed by, for example, laminating the protective film layer on one surface or both surfaces of the shock absorbing layer, and then pressing the protective film layer as necessary. Can be obtained.
- the conditions for the above-mentioned pressure bonding There are no particular limitations on the conditions for the above-mentioned pressure bonding.
- the shock absorber of the present invention having the protective film layer is formed by, for example, laminating the protective film layer on the surface of the shock absorbing layer while transporting the shock absorbing layer, and then stacking the laminate. It is possible to obtain it from the side by crimping with a lip.
- “lamination” of the protective film layer means that the protective film that has become liquid or semi-solid by heating or the like only when laminating a complete solid protective film is absorbed by the shock. It also includes the case where it is placed on at least one surface of the layer by means of coating or the like and then made into a solid form by cooling or the like. For example, while transporting the shock absorbing layer, the protective film layer that is semi-cured by heating is extruded or supplied to the surface of the transparent soft composition layer by a doctor blade, and then the shock absorbing layer and the shock absorbing layer are fed with a roller or the like. It can be obtained by pressure bonding with the protective film layer and then cooling.
- the shock absorber of the present invention having the protective film layer includes, for example, a contained liquid obtained by dissolving or melting a component constituting the protective film layer in a solvent, or the protective film layer.
- a semi-solid product obtained by heating or the like can be obtained by applying it to at least one surface of the shock absorbing layer.
- the application method is not limited. Usually, a roll coater is used.
- a release layer can be provided between the protective film layer and the shock absorbing layer in order to facilitate the peeling of the protective film layer.
- the method for providing a strong release layer is not particularly limited.
- the release layer is formed by applying a release coating agent on the exposed surface of at least one of the protective film layer surface and the shock absorbing layer.
- Can There is no particular limitation on the type of the release coating agent.
- Specific examples of the release coating agent include a silicon coating agent, an inorganic coating agent, a fluorine coating agent, an organic inorganic coating agent, and an hybrid coating agent.
- the transparent sheet provided with the release layer can usually be obtained by laminating the surface of the shock absorbing layer after providing the release layer on the surface of the protective film layer. In this case, the release layer may be provided on the surface of the shock absorbing layer, not on the surface of the protective film layer.
- the shock absorbing laminated structure of the present invention includes the shock absorbing layer constituting the shock absorber of the present invention, an impact layer provided on the impact surface side of the shock absorbing layer, and the impact absorbing layer. And a base layer provided on the surface side.
- the material / shape 'structure of the base layer is not particularly limited as long as the visibility of the display content of the display panel is not significantly hindered.
- the base layer may have a single layer structure or a multilayer structure composed of two or more layers having the same or different materials and physical properties.
- the member constituting the base layer may be a sheet or a film.
- the thickness of the base layer can be arbitrarily selected according to the product to be limited.
- Examples of the members constituting the base layer include glass plates and plastic plates of any material, and functional members (ultraviolet cut plates, polarizing plates (including various films constituting polarizing plates), arrays, and the like. Substrate, color filter, viewing angle widening film, anti-reflection film, anti-glare film, transparent conductive film and retardation film). Of these, glass plates are preferred. Examples of the glass constituting the glass plate include folate glass, aluminosilicate glass, and aluminoborosilicate glass, and low alkali glass and alkali-free glass in which the alkali metal content of these glasses is reduced. . In addition, silica glass, soda lime glass, or the like can be used. Of these, borosilicate glass, aluminosilicate glass, and aluminoborosilicate glass, and these low alkali glasses are preferred, and these alkali-free glasses are preferred.
- the impact layer does not significantly impair the visibility of the display content of the display panel. If so, there is no particular limitation on the material and shape of the structure.
- the impact layer may be a single layer structure or a multilayer structure composed of two or more layers having the same or different materials and physical properties.
- the member constituting the impact layer may be a sheet or a film.
- the thickness of the impact layer is not particularly limited, but is usually 3. Omm or less, preferably 2. Omm or less, more preferably 1. Omm or less, more preferably 0.7 mm or less. be able to.
- the material of the member constituting the impact layer is not particularly limited.
- the impact-absorbing laminated structure of the present invention can be suitably used for display panels (for example, LCD panels, plasma display panels (PDPs), organic EL display panels, etc.) such as electronic and electric devices.
- display panels for example, LCD panels, plasma display panels (PDPs), organic EL display panels, etc.
- the member constituting the impact layer is preferably a member having flexibility capable of withstanding a heavy load.
- Examples of the members constituting the impact layer include various types of resin (particularly transparent resin), glass plates, and functional members.
- resin particularly transparent resin
- glass plates various glass plates and functional members listed in the section of the base layer can be used.
- Specific examples of the transparent resin include polycarbonate resin, acrylic resin such as polymethyl methacrylate, 1,2-polybutadiene resin, polysalt resin resin, and cyclic polyolefin.
- Copolymer modified norbornene resin, norbornene resin, alicyclic acrylic resin, amorphous polyolefin such as polycyclohexylethylene, amorphous fluorine resin, polystyrene resin, transparent ABS resin , Polyethylene terephthalate, Polyethylene naphthalate, Amorphous copolyester, Polyarylate, Polymethylpentene, Polysulfone, Polyethersulfone, Polyetherimide, Cellulose acetate, Allyl diglycol carbonate resin, Ethylene.
- amorphous polyolefin such as polycyclohexylethylene, amorphous fluorine resin, polystyrene resin, transparent ABS resin , Polyethylene terephthalate, Polyethylene naphthalate, Amorphous copolyester, Polyarylate, Polymethylpentene, Polysulfone, Polyethersulfone, Polyetherimide, Cellulose acetate, Allyl diglycol carbonate resin
- EVA Coalesced
- polyester Polyolefin resin such as Tylene and Polypropylene
- beryl ester resin except EVA
- amorphous polyamide resin urethane resin
- epoxy resin unsaturated polyester resin
- key examples thereof include basic sallows.
- resins such as polycarbonate resin and acrylic resin are preferable.
- the shock-absorbing laminated structure of the present invention is the above-mentioned shock-absorbing structure constituting the shock-absorbing body of the present invention. As long as it has a layer, an impact layer provided on the impact surface side of the impact absorption layer, and a base layer provided on the impact surface side of the impact absorption layer.
- Various structures can be used.
- the number of the shock-absorbing layers is not particularly limited, and may be one layer or a plurality of two or more layers (see FIGS. 6 and 7). .
- the shock-absorbing laminated structure of the present invention has adhesiveness, it can be used not only as impact resistance but also as an adhesive layer for adhering the same layers. Two or more layers can be provided.
- the impact-absorbing laminate structure of the present invention may have a layer other than the base layer, the impact-absorbing layer, and the impact layer.
- the other layers include a resin layer composed of the above-described various types of resin (especially transparent resin) and a functional layer composed of various functional materials.
- the functional layer include an ultraviolet cut plate, a polarizing plate (including various films constituting the polarizing plate), an array substrate, a color filter, a viewing angle widening film, an anti-reflection film, an anti-glare film, a transparent conductive film, and a transparent film. 1 type or 2 or more types, such as a phase difference film, are mentioned.
- Examples of various films constituting the polarizing plate include a polarizing film, a substrate film, a protective film, and an adhesive layer.
- the number of functional layers is not particularly limited, and may be one layer or a plurality of two or more layers. Further, when two or more functional layers are provided, each functional layer may be arranged continuously, or may be arranged separated by the base layer, the shock absorbing layer, or the shock layer. .
- the functional layer may be provided on the impact surface side surface of the impact layer, or may be provided on the surface of the base layer facing the impact surface.
- the functional layer may be provided between the base layer and the impact layer. For example, it may be provided on the impact surface side surface of the base layer, or may be provided on the impact surface side surface of the impact layer.
- the functional layer may be in contact with the base layer and the impact layer, or the impact absorbing layer may be interposed therebetween.
- the shape and thickness of the impact-absorbing laminated structure of the present invention are not particularly limited. It can be made into various shapes and thickness.
- the total thickness of all the impact absorbing layers and the impact layer constituting the impact absorbing laminated structure of the present invention is usually 2 mm or less, preferably 1.5 mm or less, more preferably 1. Omm or less. can do.
- the impact-absorbing laminated structure of the present invention has the impact-absorbing layer constituting the impact-absorbing body of the present invention, it is not necessary to provide a gap between the protective plate panel and the base layer. Can also be thin.
- examples of the shock-absorbing laminated structure of the present invention include the following structures.
- other layers such as a resin layer (transparent resin layer, etc.) can be used instead of the functional layer 4.
- the shock absorbing layer 1, the first shock absorbing layer la, and the second shock absorbing layer constituting the shock absorbing laminated structure of ⁇ 2> to ⁇ 5> below.
- lb is a low elastic modulus layer 11 disposed on the base layer side, and the impact layer side, as in shock absorbing layer 1 (see FIG. 3) constituting the shock absorbing laminated structure of 1> below.
- shock absorbing layer 1 ⁇ 1> to ⁇ 5>
- the first shock absorbing layer la and the second shock absorbing layer lb are formed by laminating at least two layers having different M 300 and E ′. If it is.
- the following 1) to 5> shock absorbing layer 1, the first shock absorbing layer la, and the second shock absorbing layer lb are not only a two-layer structure as shown in FIG. It can be a shock absorbing layer. It can be a shock absorbing layer with 4 or more layers.
- Shock absorption comprising a base layer 2, a low elastic modulus layer 11 in contact with the base layer 2 and a high elastic modulus layer 12 in contact with the impact layer, provided on the impact surface side surface of the base layer 2.
- An impact-absorbing laminated structure having a layer 1 and an impact layer 3 provided on the impact surface side surface of the impact-absorbing layer 1 (FIG. 3).
- Base layer 2 functional layer 4 provided on the impact surface side surface of base layer 2, impact absorption layer 1 provided on the impact surface side surface of functional layer 4, and impact of impact absorption layer 1
- An impact-absorbing laminated structure having an impact layer 3 provided on the surface side surface (FIG. 5).
- the base layer 2 is the functional layer such as a polarizing plate, and is provided on the impact surface side surface of the first impact absorption layer la and the first impact absorption layer la provided on the impact surface side surface of the base layer.
- An impact layer 3 such as a transparent resin plate or LCD cell, a second impact absorption layer lb provided on the impact surface side surface of the impact layer 3, and an impact surface side surface of the second impact absorption layer lb.
- Another layer 5 such as an acrylic plate provided (FIG. 6).
- the base layer 2 is the functional layer such as a polarizing plate, and is provided on the impact surface side surface of the first impact absorption layer la and the first impact absorption layer la provided on the impact surface side surface of the base layer 2
- An impact layer 3 that is a transparent resin plate or an LCD cell, a second impact absorption layer lb provided on the impact surface side surface of the impact layer 3, and an impact surface side surface of the second impact absorption layer lb
- a shock absorbing laminated structure comprising: a second functional layer 4a such as a polarizing plate provided on the surface; and another layer 5 such as an acrylic plate provided on the impact surface side of the second functional layer 4a (FIG. 7). .
- the impact-absorbing laminate structure of the present invention can be obtained by disposing and bonding the impact-absorbing layer, the base layer, the impact layer, and the other layers that can be provided as necessary. it can.
- the method for bonding the layers is not particularly limited as long as the layers to be bonded can be brought into close contact with each other, and can be arbitrarily selected. As this method, for example, it can be bonded and bonded at a predetermined temperature (for example, room temperature or the like), or can be bonded using an adhesive (or pressure-sensitive adhesive). Further, it may be formed directly at a predetermined place by hot pressing, cold pressing or the like. Note that the method described in the section of the method of manufacturing the shock absorber having the multilayer structure described above is valid here.
- the shock-absorbing laminated structure for LCD of the present invention, the shock-absorbing laminated structure for plasma display, and the shock-absorbing laminated structure for organic EL display are the above-mentioned shock-absorbing layer constituting the shock-absorbing body of the present invention, and the shock-absorbing layer. And an impact layer provided on the impact surface side surface of the layer. Since the shock absorbing laminated structure for LCD, the shock absorbing laminated structure for plasma display, and the shock absorbing laminated structure for organic EL display of the present invention have the above-mentioned base layer as a liquid crystal unit or a plasma unit, the shock absorbing laminated structure of the present invention. Of the structures, the base layer may not be included.
- the shock absorbing laminated structure for LCD of the present invention The structure, the shock-absorbing laminated structure for plasma display and the shock-absorbing laminated structure for organic EL display can be suitably used for LCD panels, plasma display panels (PDP), organic EL display panels and the like.
- the impact-absorbing laminate structure for LCD of the present invention, the impact-absorbing laminate structure for plasma display, and the impact-absorbing laminate structure for organic EL display are the impact-absorbing laminate of the present invention described in detail above, except for the above base layer.
- the structure description can be applied as it is.
- the display device of the present invention has the shock-absorbing laminated structure of the present invention or the LCD shock-absorbing laminated structure of the present invention, the shock-absorbing laminated structure for plasma displays, or the shock-absorbing laminated structure for organic EL displays.
- Examples of the display device of the present invention include display devices such as electronic devices.
- the use of the display device is not particularly limited.
- a display function alone such as a display for a desktop computer, a mobile phone, a personal digital assistant (including so-called PDAs and mopile devices), a notebook computer, and an in-vehicle computer Applications that are incorporated into touch panels, televisions, watches, measuring instruments, and the like can be exemplified. In addition, it does not matter how it is carried or deferred! /.
- the display device is preferably a plate-like display device, but the shape is not limited. For example, it may be flat or curved. Examples of the types of display devices include LCDs, plasma displays, and organic EL displays.
- FIG. 2 shows the configuration of the shock absorber A that constitutes the shock absorbing laminated structure of the first embodiment.
- the shock absorber A has a total thickness of 0.4 mm and a high elastic modulus layer 1 having a thickness of 0.2 mm. 2 and a low elastic modulus layer 11 having a thickness of 0.2 mm and a shock-absorbing layer 1 having a two-layer structure.
- the high elastic modulus layer 12 is composed of a film (i) whose M300 is 12.7 MPa
- the low elastic modulus layer 11 is composed of a film (ii) whose M300 is 2.4 MPa.
- M300 of the above films (i) and (ii) was measured using a tensile tester (“AG10kNE” manufactured by Shimadzu Corporation) at a temperature of 25 ° C. and a tensile speed of 500 mmZmin.
- E in the above films (i) and (ii) is a dynamic viscoelasticity measuring device (Rheometric Scientific F'Insoil “RSA II”), tensile mode, temperature 25 ° C, Measure under conditions of applied frequency 1 ⁇ and strain 0.1%.
- the film (i) was prepared by the following method.
- the content of monomer units derived from ethylene is 86.3 mol 0/0, the content of monomer units derived from propylene 10.6 mol 0/0, 5 — 2.6 mol% of monomer units derived from ethylidene-2-norbornene, and 8 —methyl-1-8-carboxy-tetratetracyclo [4. 4. 0. I 2 ' 5. I 7 ' 10 ] — 3 dodecene
- a copolymer (A-1) having a monomer unit content of 0.5 mol% and a weight average molecular weight (MW) of 16.5 ⁇ 10 4 was used. Tetra n-butoxyzirconium (manufactured by Wako Pure Chemical Industries, Ltd.) was used as the metal compound (B-1).
- the pellets of the elastomer material obtained were subjected to an electric heat press molding machine (manufactured by Kansai Roll Co., Ltd.) with a mold temperature of 230 ° C, a pressure heating time of 10 minutes, and a pressure cooling time of 5 minutes.
- the film (i) having a thickness of 0.2 mm, a vertical width of 120 mm, and a horizontal width of 120 mm was obtained by press molding under the conditions described above.
- the shock absorber A was produced by the following method.
- the impact absorber A was obtained by laminating the film (i) on one surface of the film (ii) at 80 ° C. using a laminator (manufactured by Taisei Laminator, “VA-700”). Further, as shown in Table 2, by using the above films (i) to (iv), the impact constituting the impact-absorbing laminated structures of Examples 2 to 5 and Comparative Example 5 was performed in the same manner as in Example 1. An absorber was produced.
- the shock-absorbing laminated structure B of Example 1 is formed by laminating a base layer 2 and a shock-absorbing layer 1 made of the shock absorber of the above-described example on the surface of the base layer 2 on the impact surface side. Further, an impact layer 3 is laminated on the impact surface side surface of the impact absorbing layer 1.
- the shock absorbing layer 1 has the same size as the base layer 2 and an overall thickness of 0.4 mm.
- the shock absorbing layer 1 has a thickness of 0.2 mm and a high elastic modulus layer 12 in contact with the shock layer 3 and a thickness of 0.2 mm and a low elastic modulus layer 11 in contact with the base layer 2. It has a two-layer structure.
- the base layer 2 is a melt-formed aluminosilicate thin glass sheet (manufactured by Corning, “corning 1737”) having a thickness of 0.7 mm, a vertical width of 60 mm, and a horizontal width of 80 mm.
- the impact layer 3 is an acrylic resin having the same size as that of the base layer 2 and a thickness of 0.5 mm (“Clarex” manufactured by Nitto Seiryo Kogyo Co., Ltd.).
- the shock-absorbing laminated structure B of Example 1 was prepared by using the laminator to attach the shock-absorbing layer 1 to the base layer 2 so that the base layer 2 and the low elastic modulus layer 11 were in contact with each other at 80 °
- the impact layer 3 was laminated at 80 ° C. using a laminator so that the impact layer 3 and the high elastic modulus layer 12 were in contact with each other.
- the shock absorbing layer The impact absorbing laminates of Examples 2 to 5 and Comparative Example 5 were prepared in the same manner as in Example 1 except that the impact absorbing layer consisting of the high elastic modulus layer 12 and the low elastic modulus layer 11 shown in Table 2 was used as 1.
- a structure was prepared.
- the impact absorbing laminated structure of Comparative Example 1 was produced by providing the film (i) force layer (thickness: 0.4 mm). did.
- the above films (ii) to (iv) were used to produce the shock absorbing laminated structures of Comparative Examples 2 to 4 by the same method as Comparative Example 1. did.
- a lmm thick acrylic plate 61 (manufactured by Nitto Seiryo Kogyo Co., Ltd., “Clarex”) is placed on a base 62 which is also made of marble, and the base layer 2 is made of acrylic.
- the impact-absorbing laminated structures B of Examples 1 to 5 and Comparative Examples 1 to 5 were placed so as to be in contact with the plate 61.
- an iron ball 7 (diameter 5 cm, mass 550 g) was freely dropped from the predetermined height onto the impact-absorbing laminated structures B of Examples 1 to 5 and Comparative Examples 1 to 5 and collided.
- Example 15 which is the impact-absorbing laminated structure of the present invention has a falling ball altitude. It can be seen that Comparative Example 1-5, which is not an impact-absorbing laminated structure of the present invention, has a falling ball altitude of less than 40 cm and is inferior in impact resistance, whereas the force is S40 cm or more and excellent in impact resistance.
- the glass crack height is 70 cm, which is an improved force over Comparative Examples 1 and 2.
- the acrylic crack height is 50 cm, Since the bubble stagnation height is 15 cm, it can be seen that the impact resistance is still insufficient.
- Example 1 the height at which glass cracking occurs is 60 cm, which is superior to Comparative Examples 1, 2, 4, and 5, and in addition, the height at which acrylic cracking and bubble stagnation occur.
- the lengths are 60 cm and 55 cm, respectively, which are superior to those of Comparative Examples 1 to 5.
- Example 2 the height at which glass cracking occurs is 130 cm, which is superior to Comparative Examples 1 to 5, and the height at which acrylic cracking and bubble stagnation occur is 60 cm. It turns out that it is better than ⁇ 5.
- Example 3 the height at which glass cracking occurs is 55 cm, which is superior to Comparative Examples 1, 2, 4 and 5, and the height at which acrylic cracking and bubble stagnation occur is 55 cm and 45 cm, respectively.
- Example 4 the height at which glass cracking occurs is 70 cm, which is equivalent to Comparative Example 3, and the height at which acrylic cracking and bubble stagnation occur is 50 cm and 60 cm, respectively. It turns out that it is superior to 1-5.
- Example 5 the height at which glass cracking occurs is 6 Ocm, which is superior to Comparative Examples 1, 2, 4 and 5, and the height at which acrylic cracking and bubble stagnation occur is 60 cm and 40 cm, respectively. It can be seen that both are superior to Comparative Examples 1-5.
- the impact surface side is a low elastic modulus layer and the anti-impact surface side is a high elastic modulus layer.
- Comparative Example 5 it was found that glass cracking had already occurred at a stage of only 20 cm, which was significantly inferior to Examples 1-5 in impact resistance.
- Example 2 in which the thickness of the low elastic modulus layer 11 is thicker than that of the high elastic modulus layer 12 is significantly higher in the glass crack height than in Examples 1 and 3. This shows that the impact resistance can be improved by making the thickness of the low elastic modulus layer 11 thicker than that of the high elastic modulus layer 12.
- Examples 1 to 3 in which the impact absorbing layer is composed of the low modulus layer 11 and the high modulus layer 12 are Comparative Examples 1 to 3 in which the impact absorbing layer has a force only in the low modulus layer 11 or the high modulus layer 12. Compared to 2, the total thickness of the shock-absorbing layer is the same, but the glass crack height is large and the impact resistance is excellent.
- the example that is the shock absorbing structure of the present invention has the above-described configuration, and thus has excellent impact resistance.
- particles having a particle size of lOOnm or less can be dispersed in the base layer, the impact absorbing layer, the impact layer, and the other layers provided as necessary.
- colloidal silica can be used as this particle. By including such particles, the force applied to the layer can be received by a plurality of particles and the stress can be dispersed.
- the shock absorber and shock-absorbing laminated structure of the present invention can be applied to various applications that require impact resistance.
- display devices such as electronic and electric devices
- it can be applied to glass for automobiles, glass for building materials, bulletproof glass, and the like.
Abstract
Description
Claims
Priority Applications (1)
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JP2006529326A JPWO2006011461A1 (ja) | 2004-07-27 | 2005-07-25 | 衝撃吸収体、衝撃吸収積層構造体、液晶ディスプレイ用衝撃吸収積層構造体、プラズマディスプレイ用衝撃吸収積層構造体、有機エレクトロルミネセンスディスプレイ用衝撃吸収積層構造体及びディスプレイ装置 |
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