WO2012102287A1 - 電子部品包装用積層シート及びその成形体 - Google Patents
電子部品包装用積層シート及びその成形体 Download PDFInfo
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- WO2012102287A1 WO2012102287A1 PCT/JP2012/051499 JP2012051499W WO2012102287A1 WO 2012102287 A1 WO2012102287 A1 WO 2012102287A1 JP 2012051499 W JP2012051499 W JP 2012051499W WO 2012102287 A1 WO2012102287 A1 WO 2012102287A1
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- mass
- component
- graft
- rubber
- laminated sheet
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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
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/02—Layered products comprising a layer of natural or synthetic rubber with fibres or particles being present as additives in the layer
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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
- B32B27/06—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
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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
- B32B1/00—Layered products having a non-planar shape
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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
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B25/042—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
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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
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber 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
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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
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/14—Layered products comprising a layer of natural or synthetic rubber comprising synthetic rubber copolymers
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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
- B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
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- 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
- B32B7/023—Optical properties
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/08—Copolymers of styrene
- C08L25/14—Copolymers of styrene with unsaturated esters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
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- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
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- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2272/00—Resin or rubber layer comprising scrap, waste or recycling material
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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
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/21—Anti-static
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- 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
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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
- B32B2439/00—Containers; Receptacles
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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
- B32B2553/00—Packaging equipment or accessories not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2585/00—Containers, packaging elements or packages specially adapted for particular articles or materials
- B65D2585/68—Containers, packaging elements or packages specially adapted for particular articles or materials for machines, engines, or vehicles in assembled or dismantled form
- B65D2585/86—Containers, packaging elements or packages specially adapted for particular articles or materials for machines, engines, or vehicles in assembled or dismantled form for electrical components
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1355—Elemental metal containing [e.g., substrate, foil, film, coating, etc.]
- Y10T428/1359—Three or more layers [continuous layer]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
Definitions
- the present invention relates to a laminated sheet of transparent resin used for packaging electronic components, an embossed carrier tape formed using the same, and the like.
- embossed carrier tapes for mounting electronic parts such as ICs and LSIs on electronic devices are formed by thermoforming a sheet made of a thermoplastic resin such as vinyl chloride resin, styrene resin, polycarbonate resin into an embossed shape. Things are used.
- These embossed carrier tapes need to take measures for preventing static electricity damage to the electronic parts.
- An opaque sheet such as a sheet composed of the following resin composition has been used.
- an embossed carrier tape that stores electronic components that are less likely to be destroyed due to electrostatic failure, such as capacitors, is described in the electronic components as viewed from the outside. Since it is advantageous in terms of detecting characters, a transparent embossed carrier tape based on the above thermoplastic resin having relatively good transparency has been used.
- a sheet for a transparent embossed carrier tape As a sheet for a transparent embossed carrier tape, a sheet (such as Patent Document 1) in which a general-purpose polystyrene resin and a styrene-butadiene block copolymer are mixed, a styrene monomer unit, and a (meth) acrylic acid ester system.
- a styrene resin sheet such as a sheet composed of a rubber-modified styrene polymer containing a monomer unit (Patent Document 2 and the like).
- Carrier tapes are required to maintain a balance of physical properties such as transparency, impact resistance, bending resistance, and moldability from the usage form, and so far, to improve these properties and obtain a good balance of physical properties.
- Various studies have been made.
- a technique for imparting antistatic properties for example, coating the surface with an antistatic agent or kneading the antistatic agent into a resin is performed.
- the folding strength of the sheet is low, the problem that the sheet is easily cracked or torn in the extrusion direction, and the transparency is lowered. there were.
- an index such as haze or total light transmittance is used.
- the size of a component is further reduced, even if the haze and total light transmittance are good values, When inspecting over a carrier tape, the visibility, that is, the discrimination of characters or the like written on the parts may be difficult.
- both ends of the sheet extruded from the die are trimmed to generate portions called “ears”.
- This “ear” or the portion that does not become a product as it is, such as the starting portion when winding the sheet, is pulverized or re-pelletized and recycled as a recycled material, for example, added to the core layer raw material. It is common. Even when recycled material is added in this way, it is extremely important in terms of the productivity of the laminated sheet that the properties of the sheet are good and that the inspection through the carrier tape as described above is possible.
- the conventional laminated sheet has a problem that the transparency and the visibility are remarkably lowered when a recycled material is added.
- JP 2003-055526 A Japanese Patent Laid-Open No. 2003-253069
- the present invention is a transparent resin sheet used for packaging electronic components such as embossed carrier tapes, which has excellent antistatic properties, transparency, visibility, and a balance of physical properties such as folding strength and impact resistance, and
- An object of the present invention is to obtain a laminated sheet and an embossed carrier tape that have good physical property balance, transparency, and visibility through inspection through a carrier tape even when a recycled material is added to the core layer.
- the present inventors have found that the visibility through the carrier tape has a strong correlation with the image definition defined in JIS K7105, and the surface layer has an antistatic component.
- the headline has led to the present invention.
- a laminated sheet in which a surface conductive layer is formed on one surface of the core layer, or a surface conductive layer is formed on one surface and a back conductive layer is formed on the other surface.
- the front surface layer and / or the back surface layer includes a resin composition containing 75 to 95% by mass of the following component (A) and 25 to 5% by mass of the component (B), and the core layer includes the component (C) And a resin composition containing 5 to 50% by mass of the recycled material of the laminated sheet,
- the difference in refractive index between the component (A), the component (B), and the component (C) is 0.05 or less.
- Component (A) Contains the matrix resin (A-1) and the graft rubber (A-2), the graft ratio of the graft rubber (A-2) is 30 to 50%, and the particle diameter of the graft rubber is 0.1 to 0.00.
- component polyetheresteramide.
- the component (A) preferably contains 60 to 90% by mass of the following matrix resin (A-1) and 40 to 10% by mass of the graft rubber (A-2).
- A-1) 20 to 70% by mass of a styrene monomer unit and 80 to 30% by mass of a (meth) acrylate monomer unit, and a mass average molecular weight of 5 ⁇ 10 4 to 1 ⁇ 10 5.
- A-2) A graft rubber containing polybutadiene and a graft branch having the same composition as (A-1).
- the component (C) preferably contains 50 to 85% by mass of the following matrix resin (C-1) and 50 to 15% by mass of the graft rubber (C-2).
- C-1 30 to 80% by mass of a styrene monomer unit, 70 to 20% by mass of a (meth) acrylate monomer unit, and 0 to 10% by mass of n-butyl acrylate, and a mass average A copolymer having a molecular weight of 1 ⁇ 10 5 to 1.5 ⁇ 10 5 .
- C-2) A graft rubber comprising a styrene-butadiene block copolymer and a graft branch having the same composition as (C-1).
- an electronic component packaging container a carrier tape, and an electronic component transport tray using the laminated sheet.
- a laminated sheet having antistatic properties and excellent transparency, visibility, and folding strength can be obtained. Even if a part of the sheet is used as a recycled material, the visibility and physical properties are obtained. There is little influence on the balance, and a molded body for packaging electronic parts having a continuous antistatic effect can be produced by thermoforming the laminated sheet by pressure forming or the like. An example of this molded body is an embossed carrier tape.
- a laminate sheet according to an embodiment of the present invention is a laminate composed of a surface layer and / or a back layer containing the component (A) and the component (B), and a core layer containing the component (C).
- the so-called “ear” parts at both ends of this laminated sheet and the part that does not become a product as it is, such as the beginning part when winding the sheet are pulverized and re-pelletized.
- This is a laminated sheet added in addition to the component (C) as a raw material for the core layer.
- the component (A) or the component (C) includes a resin containing a matrix resin and a graft rubber, respectively.
- the graft rubber is prepared by dispersing the styrene monomer and (meth) acrylic acid in water in which polybutadiene or styrene-butadiene block copolymer is dispersed or emulsified as a rubber component when the copolymer composition is produced.
- This is a gel-like product produced by polymerizing an ester monomer with a general method, and the graft ratio of this graft rubber is the mass ratio of the graft branch to the rubber component in the graft rubber.
- This graft ratio can be adjusted by conditions such as the amount of monomer added during polymerization, the polymerization temperature, and the polymerization time.
- the measurement of the graft ratio and the constitution of each monomer of the matrix resin is a value measured by a general method for the rubber-modified styrene copolymer containing graft rubber.
- the graft ratio is a value measured as follows. The rubber-modified styrene copolymer of component (A) or component (C) is dissolved in toluene, and then the precipitate obtained by centrifugation is dried with a vacuum dryer, and the mass of the precipitate is determined as the mass X of the graft rubber. It was.
- the composition of each monomer of the matrix resin is to separate the precipitate and supernatant obtained by dissolving the rubber-modified styrene copolymer of component (A) or component (C) in toluene and then centrifuging it. Then, methanol is added to precipitate the styrene monomer.
- the resin composition of the core layer was obtained by separating the core layer, dissolving in deuterated chloroform, and performing 13C measurement using FT-NMR (FX-90Q type, manufactured by JEOL Ltd.). And the composition obtained by calculating the composition ratio of each monomer from the peak area of the (meth) acrylic acid ester monomer. Further, the content of the antistatic agent is a content determined by quantification by pyrolysis gas chromatography while the core layer is solid.
- a laminate sheet according to an embodiment of the present invention is a laminate composed of a surface layer and / or a back layer containing the component (A) and the component (B), and a core layer containing the component (C). It is a sheet.
- Component (A) or component (C) is a single component of a styrene monomer and a (meth) acrylate ester in water in which polybutadiene or a styrene-butadiene block copolymer is dispersed or emulsified as a rubber component. It is manufactured by general radical polymerization. At that time, a part of them is bonded to the rubber component as a graft branch to become a graft rubber.
- the graft rubbers in the component (A) and the component (C) are referred to as (A-2) and (C-2), respectively.
- copolymers that do not become graft branches are also produced, and these matrix resins are designated as (A-1) or (C-1), respectively.
- (A-1) and (C-1) are separately a styrene monomer and a (meth) acrylate monomer. You may mix
- the styrene monomer is styrene or a derivative thereof.
- the derivatives include ⁇ -methyl styrene, p-methyl styrene, o-methyl styrene, pt-butyl styrene and the like.
- Styrene is preferred.
- Styrenic monomers may be used alone or in combination of two or more.
- the (meth) acrylic acid ester monomer is a derivative of acrylic acid ester or methacrylic acid ester, such as methyl methacrylate, ethyl methacrylate, methyl acrylate, ethyl acrylate, n-butyl acrylate, 2-methylhexyl. Examples thereof include acrylate and 2-ethylhexyl acrylate.
- the (meth) acrylic acid ester monomers may be used alone or in combination of two or more.
- the component (B) to be blended in the surface layer and the back layer is a polyether ester amide in that it is less likely to impair transparency when mixed with the component (A) and has a continuous antistatic effect. Can be used. From the viewpoint of obtaining good transparency and an antistatic effect, the amount added is in the range of 75 to 95% by mass for component (A) and 25 to 5% by mass for component (B). From the viewpoint of transparency, the component (B) preferably has a refractive index close to that of the component (A). Further, when used as a recycled material, it is preferably close to the component (C), and the difference in refractive index between the components (A), (B) and (C) is more preferably 0.05% or less.
- the total thickness of the laminated sheet according to an embodiment of the present invention is generally 100 to 700 ⁇ m, and the thicknesses of the surface layer and the back layer are each of the total thickness from the balance of the transparency of the sheet and various mechanical properties. A range of 3 to 20% is preferred.
- the surface layer and the back layer contain a resin composition containing 75 to 95% by mass of component (A) and 25 to 5% by mass of component (B) as described above. (B) When a component exceeds 25 mass%, transparency will fall. When the component (B) is less than 5% by mass, the antistatic performance decreases.
- the component (A) is a copolymer of a rubber-modified styrene monomer and a (meth) acrylate monomer, and the copolymer of the component (A) is a matrix resin (A- 1) and a graft rubber (A-2), the graft rubber (A-2) has a graft ratio of 30 to 50%, a graft rubber particle size of 0.1 to 0.5 ⁇ m, and component (A) A rubber-modified styrene copolymer containing a styrene monomer containing 5 to 25% by mass of butadiene with respect to 100% by mass and a (meth) acrylic acid ester monomer.
- the transparency is lowered.
- the graft ratio exceeds 50%, the folding strength along the sheet extrusion direction (MD) is significantly reduced (folding strength of the sample sampled in the vertical direction (TD)).
- the particle diameter of the graft rubber exceeds 0.5 ⁇ m, the surface becomes rough due to an increase in the amount of rubber shrinkage, and the visibility of characters and the like written on the parts housed over the carrier tape is greatly reduced.
- the graft rubber particle size is 0.1 ⁇ m or less, the bending strength is remarkably lowered.
- the copolymer of the component (A) contains 60 to 90% by mass of the matrix resin (A-1) and 40 to 10% by mass of the graft rubber (A-2).
- the matrix resin (A-1) A copolymer containing 20 to 70% by mass of a styrene monomer unit and 80 to 30% by mass of a (meth) acrylic acid ester monomer unit, and the graft rubber (A-2) contains polybutadiene,
- the mass average molecular weight (Mw) of the component (A-1) is preferably 5 ⁇ 10 4 to 1 ⁇ 10 5 . If the Mw is less than 5 ⁇ 10 4 , the bending strength may be weakened. If it exceeds 1 ⁇ 10 5 , when used as a recycled material, the dispersibility in the C component may be poor and the transparency may be lowered. .
- the resin composition of component (C) constituting the core layer according to one embodiment of the present invention contains 5 to 25% by mass of butadiene from the viewpoint of physical properties such as folding strength of the laminated sheet and transparency.
- the graft rubber (A-2) contained in the surface layer and the back layer is set to a relatively low graft ratio as described above, and the graft ratio of the graft rubber (C-2) in the core layer is set to such a high range. This is an important feature of the present invention, whereby a laminated sheet having excellent folding strength and transparency can be obtained.
- the component (C) contains 50 to 85% by mass of the matrix resin (C-1) and 50 to 15% by mass of the graft rubber (C-2). Is preferable.
- the mass average molecular weight (Mw) of the component (C-1) is preferably 1 ⁇ 10 5 to 1.5 ⁇ 10 5 . If Mw is less than 1 ⁇ 10 5 , moldability and folding strength may be lowered, and it may be difficult to obtain a sheet having good impact strength. On the other hand, if Mw exceeds 1.5 ⁇ 10 5 , the transparency may be lowered due to a decrease in the dispersibility of the graft rubber.
- the graft rubber (C-2) usually has graft branches having the same composition as the matrix resin (C-1).
- Additives such as antioxidants, weathering agents, lubricants, plasticizers, colorants, antistatic agents, mineral oils, flame retardants and the like are added to the resin constituting the laminated sheet according to an embodiment of the present invention. Can be added. Furthermore, an antistatic agent, silicone, antifogging agent, or the like may be applied to the surface in order to improve the surface characteristics of the sheet.
- the method for producing the laminated sheet of the present invention is not particularly limited and can be produced by a general method.
- it is preferably manufactured by extrusion using a multi-layer T-die having a multi-manifold or T-die extrusion using a feed block.
- the so-called “ear” portion generated in the sheet extrusion step is generally pulverized and added to the core layer as a recycled material.
- the amount of the recycled material added to the core layer is up to 3% by mass when the polyether ester amide of component (B), which is one component of the front layer and the back layer, is 100% by mass of the total amount of the core layer.
- the amount of the recycled material added to the core layer is preferably in the range of 5 to 50% by mass when the total amount of the core layer is 100% by mass.
- free-form electronic component packaging containers such as carrier tapes (embossed carrier tapes) and trays can be formed by known sheet forming methods (thermoforming) such as vacuum forming, pressure forming, and press forming.
- sheet forming methods such as vacuum forming, pressure forming, and press forming.
- thermoforming vacuum forming, pressure forming, and press forming.
- the laminated sheet of the present invention is a laminated sheet using the above as the resin used for the front layer, the back layer, and the core layer, so that the heat of the laminated sheet can be obtained even if the recycled material is added to the core layer.
- a transparent type embossed carrier tape having good antistatic properties, transparency, visibility, folding strength, and impact strength can be produced.
- a carrier tape is a carrier tape body that is stored in a storage portion formed by the above-described molding method, and then covered with a cover tape and wound up in a reel shape. It can be used for conveyance.
- An electronic component package is an electronic component stored in an electronic component packaging container such as a carrier tape or tray.
- an electronic component packaging container such as a carrier tape or tray.
- the electronic components to be packaged There are no particular limitations on the electronic components to be packaged.
- IC LED (light emitting diode), resistor, liquid crystal, capacitor, transistor, piezoelectric element register, filter, crystal oscillator, crystal resonator, diode, connector, switch, volume, There are relays and inductors. It can also be used for packaging intermediate products and final products using these electronic components.
- the laminated sheets obtained in the examples and comparative examples of the present invention were evaluated by the following methods.
- (1) Transparency of laminated sheet Haze and total light transmittance were measured based on JIS K 7105.
- the haze value is 15% or less.
- (2) Visibility of laminated sheet The image clarity was measured according to JIS K 7374.
- the optical comb width was 1 mm depending on the correlation with visual perception.
- the image sharpness is a value indicating how sharp an image of an object seen through the plastic is, and is a value representing “visibility” which is one of the problems of the present invention as a specific numerical value.
- the image definition value is 88% or more.
- Examples 1 to 10 The rubber-modified styrenic copolymer (resin 1, resin 2 and resin 11) shown in Table 1 and the polyether ester amide (Perestat NC6321 / Sanyo Kasei) as the antistatic agent of component (B)
- the resin composition of the surface layer and the back layer is mixed at the ratio shown in Table 2, and the rubber-modified styrene copolymer (resin 3, resin 4 and resin 12) of component (C) is mixed with the recycled material.
- the evaluation results are shown in Table 3.
- thermoforming By using a known sheet forming method (thermoforming) such as vacuum forming, pressure forming, press forming, etc., from the laminated sheet of the present invention, free-form electronic component packaging such as carrier tape (embossed carrier tape) and tray A container can be obtained. Even if the recycled material is added to the core layer by the laminated sheet of the present invention, as the thermoformed product of the laminated sheet, all of antistatic properties, transparency, visibility, folding strength and impact strength are good. A transparent type embossed carrier tape can be manufactured.
- thermalforming such as vacuum forming, pressure forming, press forming, etc.
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Abstract
Description
前記表面層及び/又は裏面層が下記の(A)成分を75~95質量%、及び(B)成分を25~5質量%含有する樹脂組成物を含み、前記中芯層が(C)成分を95~50質量%、及び、この積層シートの再生材を5~50質量%含有する樹脂組成物を含んでなり、
(A)成分、(B)成分、及び(C)成分の屈折率差がそれぞれ0.05以下である積層シートが提供される。
(A)成分:マトリックス樹脂(A-1)とグラフトゴム(A-2)を含み、グラフトゴム(A-2)のグラフト率が30~50%、グラフトゴム粒径が0.1~0.5μmであり、ブタジエンを5~25質量%含有するスチレン系単量体と(メタ)アクリル酸エステル系単量体とを含むゴム変性スチレン系共重合体。
(B)成分:ポリエーテルエステルアミド。
(C)成分:マトリックス樹脂(C-1)とグラフトゴム(C-2)を含み、グラフトゴム(C-2)のグラフト率が70~90%、グラフトゴム粒径が0.4~1.0μmであり、ブタジエンを5~15質量%含有するスチレン系単量体と(メタ)アクリル酸エステル系単量体とを含むゴム変性スチレン系共重合体。
(A-1):スチレン系単量体単位20~70質量%と、(メタ)アクリル酸エステル単量体単位80~30質量%とを含み、質量平均分子量が5×104~1×105である共重合体。
(A-2):ポリブタジエンと、(A-1)と同組成のグラフト枝とを含むグラフトゴム。
(C-1):スチレン系単量体単位30~80質量%と、(メタ)アクリル酸エステル単量体単位70~20質量%と、n-ブチルアクリレート0~10質量%を含み、質量平均分子量が1×105~1.5×105である共重合体。
(C-2):スチレン-ブタジエンブロック共重合体と、(C-1)と同組成のグラフト枝とを含むグラフトゴム。
グラフトゴム(A-2)のグラフト率が30%未満では、透明性が低下する。グラフト率が50%を超えると、シートの押出方向(MD)に沿った耐折強度が著しく低下する(垂直方向(TD)にサンプリングしたサンプルの耐折強度)。またグラフトゴム粒径が0.5μmを超える場合、ゴムの収縮量が増えることにより表面が粗くなり、キャリアテープ越しに収納されている部品に記載された文字等の視認性が大きく低下する。グラフトゴム粒径が0.1μm以下では耐折強度が著しく低下する。そして(A)成分中のブタジエンを前記のように5~25質量%の範囲にすると、透明性、前記視認性、及び耐折強度等のバランスが良好な積層シートが得られる。本発明者等は、前記のようにこの「視認性」がJIS K7105に規定されている「像鮮明度」と強い相関性があることを見出し、表面層、裏面層、及び中芯層の樹脂組成について評価を行った。以下本発明の「視認性」についての評価は、この「像鮮明度」の評価による。
本発明の各実施例及び比較例で得られた積層シートを以下の方法にて評価した。
(1)積層シートの透明性
JIS K 7105に準拠し、ヘイズ及び全光線透過率を測定した。
ヘイズの値は15%以下とする。
(2)積層シートの視認性
JIS K 7374に準拠し、像鮮明度を測定した。光学くし目幅は、視感との相関によって1mmを採用した。像鮮明度とは、プラスチックを透過して見える物体の像がどの程度鮮明に見えるかの値であり、具体的数値として本発明の課題の一つである「視認性」を表す値である。像鮮明度の値は88%以上とする。
(3)耐折強度
ASTM D2176に基づき、長さ120mm、幅15mm、厚さ0.3mmの試験片を作製し、東洋精機製作所製MIT耐折疲労試験機を用いて、シートより、MD(シートの押出方向)、及びTD(シートの押出方向に対して垂直方向)を長さ方向としたサンプリングを行い、MIT耐折強度の測定を行った。この時、折り曲げ角度135度、折り曲げ速度175回毎分、測定荷重9.8Nにて試験を行った。MDは100回以上、TDは50回以上とする。
(4)表面抵抗率
JIS K 6911に準拠し、23℃×50%RH環境下で測定した。
尚、帯電防止性能は、測定した表面抵抗率が1012~1013Ω/sq.では静的状態での障害防止(ほこり付着防止)に有効であり、1010~1012Ω/sq.では動的状態での障害防止(摩擦等による静電気発生下での帯電防止)に有効である。
表1に示した(A)成分のゴム変性スチレン系共重合体(樹脂1、樹脂2及び樹脂11)と(B)成分の帯電防止剤であるポリエーテルエステルアミド(ペレスタット NC6321/三洋化成)を、表2に示す割合で混合して表面層及び裏面層の樹脂組成物とし、(C)成分のゴム変性スチレン系共重合体(樹脂3、樹脂4及び樹脂12)と再生材とを混合して中芯層とし、φ65mm押出機(L/D=32)1台、φ40mm押出機(L/D=26)2台及び600mm幅のTダイによりマルチマニホールド法にて、平均厚300μm、表面層/中芯層/裏面層:5/90/5の2種3層の積層シートを得た。評価結果を表3に示す。
前記の(A)成分、(C)成分及び(B)を表4に示す割合で混合して各樹脂組成物のコンパウンドを得た以外は、実施例1~10と同様にして2種3層の積層シートを得た。評価結果を表5に示した。
Claims (6)
- 表面層と、中芯層と、裏面層を含む積層シートにおいて、
前記表面層及び前記裏面層が下記の(A)成分を75~95質量%、及び(B)成分を25~5質量%含有する樹脂組成物を含み、前記中芯層が(C)成分を95~50質量%、及び、この積層シートの再生材を5~50質量%含有する樹脂組成物を含み、
(A)成分、(B)成分、及び(C)成分の屈折率差がそれぞれ0.05以下である、積層シート。
(A)成分:マトリックス樹脂(A-1)とグラフトゴム(A-2)とを含み、グラフトゴム(A-2)のグラフト率が30~50%、グラフトゴム粒径が0.1~0.5μmであり、ブタジエンを5~25質量%含有するスチレン系単量体と(メタ)アクリル酸エステル系単量体とを含むゴム変性スチレン系共重合体。
(B)成分:ポリエーテルエステルアミド。
(C)成分:マトリックス樹脂(C-1)とグラフトゴム(C-2)とを含み、グラフトゴム(C-2)のグラフト率が70~90%、グラフトゴム粒径が0.4~1.0μmであり、ブタジエンを5~15質量%含有するスチレン系単量体と(メタ)アクリル酸エステル系単量体とを含むゴム変性スチレン系共重合体。 - 前記(A)成分が、下記のマトリックス樹脂(A-1)60~90質量%と、グラフトゴム(A-2)40~10質量%とを含む、請求項1に記載の積層シート。
(A-1):スチレン系単量体単位20~70質量%と、(メタ)アクリル酸エステル単量体単位80~30質量%とを含み、質量平均分子量が5×104~1×105である共重合体。
(A-2):ポリブタジエンと、(A-1)と同組成のグラフト枝とを含むグラフトゴム。 - 前記(C)成分が、下記のマトリックス樹脂(C-1)50~85質量%と、グラフトゴム(C-2)50~15質量%とを含む、請求項1又は請求項2に記載の積層シート。
(C-1):スチレン系単量体単位30~80質量%と、(メタ)アクリル酸エステル単量体単位70~20質量%と、及びn-ブチルアクリレート0~10質量%とを含み、質量平均分子量が1×105~1.5×105である共重合体。
(C-2):スチレン-ブタジエンブロック共重合体と、(C-1)と同組成のグラフト枝とを含むグラフトゴム。 - 請求項1~4のいずれか1項に記載のシートを用いた電子部品包装容器。
- 請求項1~4のいずれか1項に記載のシートを用いたキャリアテープ。
- 請求項1~4のいずれか1項に記載のシートを用いた電子部品搬送用トレイ。
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PH1/2013/501593A PH12013501593A1 (en) | 2011-01-28 | 2012-01-25 | Laminated sheet for packaging electronic component and molded body thereof |
| US13/981,223 US9028939B2 (en) | 2011-01-28 | 2012-01-25 | Laminated sheet for packaging electronic component and molded body thereof |
| JP2012554811A JP5814268B2 (ja) | 2011-01-28 | 2012-01-25 | 電子部品包装用積層シート及びその成形体 |
| SG2013056585A SG192127A1 (en) | 2011-01-28 | 2012-01-25 | Laminated sheet for packaging electronic component and molded body thereof |
| KR1020137021484A KR101908154B1 (ko) | 2011-01-28 | 2012-01-25 | 전자 부품 포장용 적층 시트 및 그 성형체 |
| CN201280006628.1A CN103338932B (zh) | 2011-01-28 | 2012-01-25 | 电子器件包装用层叠片材及其成型体 |
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| JP2011016640 | 2011-01-28 | ||
| JP2011-016640 | 2011-01-28 |
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| US (1) | US9028939B2 (ja) |
| JP (1) | JP5814268B2 (ja) |
| KR (1) | KR101908154B1 (ja) |
| CN (1) | CN103338932B (ja) |
| MY (1) | MY161160A (ja) |
| PH (1) | PH12013501593A1 (ja) |
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| WO2019146630A1 (ja) * | 2018-01-24 | 2019-08-01 | デンカ株式会社 | 積層シートおよびそれを用いて成形した電子部品包装容器 |
| US10731346B2 (en) | 2017-03-16 | 2020-08-04 | Thomas L. Kelly | Roofing cover board with coating |
| US10808405B2 (en) | 2017-03-16 | 2020-10-20 | Thomas L. Kelly | Roofing cover board with coating |
| JPWO2020218133A1 (ja) * | 2019-04-26 | 2020-10-29 |
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| PH12022550833A1 (en) * | 2019-10-11 | 2023-07-03 | Dainippon Printing Co Ltd | Cover tape for packing electronic component, package, and package set |
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| CN111491797A (zh) * | 2018-01-24 | 2020-08-04 | 电化株式会社 | 层叠片材以及利用该层叠片材成型的电子元件包装容器 |
| JP7138665B2 (ja) | 2018-01-24 | 2022-09-16 | デンカ株式会社 | 積層シートおよびそれを用いて成形した電子部品包装容器 |
| JPWO2019146630A1 (ja) * | 2018-01-24 | 2021-02-04 | デンカ株式会社 | 積層シートおよびそれを用いて成形した電子部品包装容器 |
| WO2020218133A1 (ja) * | 2019-04-26 | 2020-10-29 | デンカ株式会社 | 積層シート及び電子部品包装容器並びに電子部品包装体 |
| CN113727846A (zh) * | 2019-04-26 | 2021-11-30 | 电化株式会社 | 层叠片材、电子零件包装容器以及电子零件包装体 |
| JPWO2020218133A1 (ja) * | 2019-04-26 | 2020-10-29 | ||
| US11701874B2 (en) | 2019-04-26 | 2023-07-18 | Denka Company Limited | Layered sheet, electronic component packaging container, and electronic component packaging |
| JP7442509B2 (ja) | 2019-04-26 | 2024-03-04 | デンカ株式会社 | 積層シート及び電子部品包装容器並びに電子部品包装体 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20130295307A1 (en) | 2013-11-07 |
| US9028939B2 (en) | 2015-05-12 |
| CN103338932A (zh) | 2013-10-02 |
| SG192127A1 (en) | 2013-08-30 |
| MY161160A (en) | 2017-04-14 |
| PH12013501593A1 (en) | 2013-09-30 |
| CN103338932B (zh) | 2015-09-23 |
| KR20140027094A (ko) | 2014-03-06 |
| KR101908154B1 (ko) | 2018-10-15 |
| JPWO2012102287A1 (ja) | 2014-06-30 |
| JP5814268B2 (ja) | 2015-11-17 |
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