WO2006109666A1 - 発泡部材、発泡部材積層体及び発泡部材が用いられた電気・電子機器類 - Google Patents
発泡部材、発泡部材積層体及び発泡部材が用いられた電気・電子機器類 Download PDFInfo
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- WO2006109666A1 WO2006109666A1 PCT/JP2006/307318 JP2006307318W WO2006109666A1 WO 2006109666 A1 WO2006109666 A1 WO 2006109666A1 JP 2006307318 W JP2006307318 W JP 2006307318W WO 2006109666 A1 WO2006109666 A1 WO 2006109666A1
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- foam
- thermoplastic
- resin
- foamed member
- foamed
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
- C08J9/40—Impregnation
- C08J9/42—Impregnation with macromolecular compounds
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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
-
- 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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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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
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249982—With component specified as adhesive or bonding agent
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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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249987—With nonvoid component of specified composition
- Y10T428/249991—Synthetic resin or natural rubbers
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249987—With nonvoid component of specified composition
- Y10T428/249991—Synthetic resin or natural rubbers
- Y10T428/249992—Linear or thermoplastic
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249987—With nonvoid component of specified composition
- Y10T428/249991—Synthetic resin or natural rubbers
- Y10T428/249992—Linear or thermoplastic
- Y10T428/249993—Hydrocarbon polymer
Definitions
- the present invention relates to a foamed member, a foamed member laminate, and electrical / electronic devices using the foamed member. More specifically, even a foamed member having a high expansion ratio is used as a carrier tape.
- the present invention relates to a foamed member, a foamed member laminate, and electrical / electronic equipment using the foamed member that can suppress or prevent foam breakage during peeling.
- Foamed members are generally punched out in the required shape according to the shape of the member used, and the surface of the foamed member is adhesively processed to facilitate fixing to the member. Since the foamed member to which such force is applied is not easy to handle, a carrier tape may be used to efficiently transport the foamed member to a predetermined location. That is, the foamed member is subjected to various types of processing (such as punching and adhesive processing) while being attached to the carrier tape, or is transported after processing. On the other hand, after processing, the foam member is required to be peeled off by the carrier tape force. If the strength of the surface of the foam member is low (weak), the foam member may be destroyed at the time of peeling.
- a foamed member with a high expansion ratio for example, formed by a process in which a thermoplastic resin is impregnated with a high-pressure inert gas (for example, carbon dioxide in a supercritical state) and then decompressed.
- a high-pressure inert gas for example, carbon dioxide in a supercritical state
- a foam having excellent toughness, scratch resistance, abrasion resistance, and the like has been proposed by applying a surface treatment layer made of a polar polymer (see Patent Document 2). Furthermore, a foam whose surface has been treated with a polychloroprene-based adhesive composition (see Patent Document 3), and a foam whose surface is provided with an easily water-soluble layer (such as a polybutyl alcohol layer) (Patent Document) 4) is proposed.
- Patent Document 1 Japanese Patent Application Laid-Open No. 9 131822
- Patent Document 2 JP 2003-136647 A
- Patent Document 3 Japanese Patent Laid-Open No. 5-24143
- Patent Document 4 Japanese Patent Laid-Open No. 10-37328
- an object of the present invention is to provide a foamed member, a foamed member laminate, and a foam capable of suppressing or preventing foam breakage when the carrier tape force is peeled, even for a foamed member having a high foaming ratio.
- An object of the present invention is to provide electrical and electronic equipment using the members.
- Another object of the present invention is to use a foamed member, a foamed member laminate and a foamed member that are excellent in reworkability! The goal is to provide beaten electrical and electronic equipment.
- the present inventors have formed a foam by forming a specific thermoplastic resin layer or a thermoplastic elastomer resin layer on the surface of the foam. It has a high foaming ratio, and even when the cell wall thickness is thin, it is possible to effectively suppress or prevent foam breakage caused by the cell wall thinness when the carrier tape force is peeled off. I found it.
- the present invention has been completed based on these findings.
- thermoplastic resin foam layer comprising a thermoplastic resin foam formed by impregnating a thermoplastic resin with a high-pressure inert gas and then reducing the pressure.
- a foamed member having at least one of a thermoplastic polyester-based resin layer and a thermoplastic elastomer-coated resin layer on at least one surface of the thermoplastic resin-based foam layer.
- a foam member is provided.
- thermoplastic resin constituting the thermoplastic resin foam layer is a polyolefin-based resin.
- a cocoa is preferred.
- the apparent density of the thermoplastic resin foam layer is preferably 0.2 gZcm 3 or less.
- the glass transition temperature of the thermoplastic polyester resin constituting the thermoplastic polyester resin layer is preferably 20 ° C or lower.
- the thermoplastic polyester resin layer may have a structure in which a thermoplastic polyester resin is cross-linked.
- thermoplastic elastomer resin constituting the thermoplastic elastomer resin layer a thermoplastic elastomer resin having a hard segment content of less than 50 mol% can be suitably used.
- thermoplastic elastomer resin constituting the thermoplastic elastomer resin layer styrene-isoprene-styrene thermoplastic elastomer resin is preferable.
- the present invention is also a foam member laminate having a configuration in which the foam member is held by a carrier tape, wherein the foam member is used as the foam member, and the foam member is used as the carrier tape.
- Foam characterized by having a configuration in which the surface of the thermoplastic polyester resin layer or thermoplastic elastomer resin layer of the foam member and the adhesive surface of the carrier tape are in contact with each other.
- a member laminate is provided.
- the present invention further relates to electrical / electronic devices using foamed members, wherein the foamed members are used as foamed members! I will provide a.
- the foamed member of the present invention is a foamed member having a high expansion ratio, it is possible to suppress or prevent foam breakage when it is peeled off from the carrier tape. In addition, reworkability is excellent.
- the foamed member of the present invention has a thermoplastic resin foam layer formed of a thermoplastic resin foam formed by impregnating a thermoplastic resin with a high-pressure inert gas and then reducing the pressure. And a thermoplastic polyester-based resin layer and Z or a thermoplastic elastomer-resin layer on at least one surface of the thermoplastic resin foam layer.
- the thermoplastic polyester is applied to at least one surface (one surface or both surfaces) of the thermoplastic resin foam layer.
- foamed members can be peeled off with carrier tape force after various processes are applied to carrier tape [especially even when peeled at a high speed (for example, with a peeling speed of lOmZmin)] In addition, it can be easily peeled without causing foam breakage that causes breakage in the foam layer of the foam member.
- the foamed member is held by a carrier tape when processed or transported, and is used after being processed or transported and peeled off from the carrier tape.
- the behavior of the carrier tape holding the foamed member during such transport or calorie is related to the peeling phenomenon at low speed, and the adhesive force is sufficient to prevent peeling during processing or transport (for example, 23 ° C, 50RH%, tensile speed: 0.3 mZmin, peeling angle: 180 ° when peeled and measured to have an adhesive strength of 0.6 N / 20 mm or more.
- the behavior of peeling the foam member from the carrier tape is related to the peeling phenomenon at high speed. In this high speed peeling (high speed peeling; for example, when the tensile speed is lOmZmin), the carrier tape It must be peeled in the state of interfacial peeling that peels at the interface between the foam and the foam member
- the adhesive force when adhered to a carrier tape and held and peeled off from the carrier tape at a low speed (for example, 23 ° C, 50RH) %, Tensile speed: 0.3mZmin, Peeling angle: Adhesive strength when measured by peeling at 180 °) is 0.6NZ20mm or more, and it is processed and transported while being held on the carrier tape.
- the foamed member is held by the carrier tape during processing and conveyance.
- the foam member after processing and transporting with the foam member held on the carrier tape, the foam member must be peeled off by the carrier tape force, but even if it is peeled off from the carrier tape at high speed (for example, , Even if the tensile speed is lOmZmin), it can be peeled off at the interface between the foam member and the carrier tape, which suppresses or prevents the occurrence of foam breakage that causes breakage in the foam layer of the foam member It has been.
- high speed for example, Even if the tensile speed is lOmZmin
- the foamed member has the above-described configuration (in particular, the thermoplastic polyester-based foam).
- the thermoplastic polyester-based resin layer having a structure in which a thermoplastic polyester-based resin is cross-linked as the oil layer
- excellent reworkability can be exhibited.
- the foamed member of the present invention is damaged, for example, even after being attached to an adherend in a state where the foamed member is compressed to 50% and after aging at 50 ° C for 7 days. It is possible to peel the substrate more easily than the adherend.
- reworkability refers to the case where a foamed member is incorporated in an electrical / electronic device or the like as a dustproof material or sealing material, and is applied to the resin surface or metal surface of the device housing, the glass surface of the image display unit, or the like. A characteristic that can be easily peeled off.
- the foam member adheres to the surface of the adherend as described above, the foam member may be damaged when the device is disassembled for maintenance or the like, and the function as a dustproof material or seal material may not be achieved. There is. In addition, if the foamed member cannot be easily peeled off from the adherend, it becomes difficult to separate and collect each material at the time of disassembly, which may hinder the reuse of the material. Therefore, it is preferable that the foam member has excellent reworkability!
- thermoplastic polyester-based resin layer (Thermoplastic polyester-based resin layer)
- thermoplastic polyester-based resin layer formed on the thermoplastic resin-based foam layer is not particularly limited as long as it is a layer formed of a thermoplastic polyester-based resin.
- the thermoplastic polyester-based resin constituting the thermoplastic polyester-based resin layer is not particularly limited as long as it is a resin having an ester bond site by a reaction (polycondensation) between a polyol component and a polycarboxylic acid component. .
- polyol component examples include ethylene glycol, 1,3-trimethylene glycol, 1,4 butanediol, 2-methyl-1,3 propanediol, 1,5 pentanediol, neopentyl glycol, 2,2 dimethyl-1, 3-propanediol, 1,6-hexanediol, 3-methyl-1,5-pentanediol, 2-methyl-2,4 pentanediol, 1,7 heptanediol, 2,2 jetyl 1,3 propanediol, 2-methyl-2 Propyl 1,3 propanediol, 2-methyl-1,6 hexanediol, 1,8 octanediol, 2 butyl-2 ethyl-1,3 propanediol, 1,3,5 trimethyl-1,3 pentanediol, 1,9-nonanediol, 2,4 Jetyl 1,5 Pentanediol, 2-Methyl-1
- the polyol component may be a polyol component in a polymer form such as polyether polyol or polyester polyol.
- the polyether polyol include polyether glycols such as polyethylene glycol, polypropylene glycol, polytetramethylene glycol obtained by ring-opening polymerization of ethylene oxide, propylene oxide, tetrahydrofuran, and copolyether obtained by copolymerization thereof. Examples include diols.
- examples of the polyol component include glycerin, trimethylolpropane, 1,2,4-butanetriol, 1,2,5 pentanetriol, 1,2,6 hexanetriol, pentaerythritol, dipentaerythritol and the like.
- a trihydric or higher polyhydric alcohol can also be used.
- polycarboxylic acid component examples include aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, phthalic acid, 2,6 naphthalenedicarboxylic acid, 1,4 naphthalenedicarboxylic acid, and 4,4'-biphenyl dicarboxylic acid; Aliphatic dicarboxylic acids such as oxalic acid, succinic acid, methyl succinic acid, glutaric acid, adipic acid, pimelic acid, azelaic acid, sebacic acid, 1,12-dodecanedioic acid, 1,14-tetradecanedioic acid, dimer acid; Examples thereof include dicarboxylic acid components such as alicyclic dicarboxylic acids such as 1,4 cyclohexane dicarboxylic acid, 1,3 cyclohexane dicarboxylic acid, and 1,2 cyclohexane dicarboxylic acid.
- aromatic dicarboxylic acids such
- examples of the polycarboxylic acid component include 1,2,4 butanetricarboxylic acid, 1,2,5 hexanetricarboxylic acid, 1,2,4-cyclohexanetricarboxylic acid, trimellitic acid, pyromellitic acid and the like. These trivalent or higher polyvalent carboxylic acids can also be used.
- the polycarboxylic acid component may be acid anhydrides or lower alkyl esters of these carboxylic acids! / ⁇ [0020]
- Each of the polyol component and the polycarboxylic acid component may be used alone or in combination of two or more.
- thermoplastic polyester-based resin examples include, for example, polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polybutylene naphthalate, and the like.
- the thermoplastic polyester resin can be used alone or in combination of two or more.
- thermoplastic polyester-based resin for example, a series of trade names “Byron” (manufactured by Toyobo Co., Ltd.) and the like can be preferably used. Specifically, for example, “Byron 290” (glass transition temperature 64 ° C), “Byron 300” (glass transition temperature 9 ° C), “Byron GK-110J (glass transition temperature 42 ° C), “Nylon 29SS” (“Byron 290” dissolved in a mixed solvent of toluene Z methyl ethyl ketone (weight ratio: 80/20)), “Byron 3 OSSJ” (“Byron 300” in toluene Z methyl ethyl ketone) (Weight dissolved in a mixed solution of 80Z20)).
- Byron 290 glass transition temperature 64 ° C
- Byron 300 glass transition temperature 9 ° C
- Byron GK-110J glass transition temperature 42 ° C
- Nylon 29SS (“Byron 290” dissolved in a mixed solvent of toluene Z methyl ethy
- the thermoplastic polyester-based resin preferably has a glass transition temperature of 20 ° C or lower, particularly preferably 15 ° C or lower. If the glass transition temperature of a thermoplastic polyester resin exceeds 20 ° C !, it will depend on the type of thermoplastic resin that constitutes the thermoplastic resin foam layer. When applying fat to the surface of the thermoplastic resin foam layer, curling of the thermoplastic resin foam layer may occur due to the difference in shrinkage, and if it is 20 ° C or less, the thermoplastic resin Curling of the resin foam layer is likely to occur.
- the glass transition temperature is determined by a measurement method using a differential thermal scanning calorimeter (DSC) to obtain a so-called "DSC curve" at the time of reheating, and the extrapolated glass transition specified in JIS K 7121 is started.
- the temperature can be determined as the glass transition temperature.
- thermoplastic polyester-based resin layer may have a structure in which a thermoplastic polyester-based resin is cross-linked or a structure that is not cross-linked. Therefore, the thermoplastic polyester-based resin layer can be formed using a cross-linking agent as required. For example, when a foamed member is used as a sealing material (for example, a sealing material for electrical / electronic devices), if a stronger sealing property is desired, the foamed member is not cross-linked without being cross-linked. In addition, by forming the thermoplastic polyester-based resin layer in a form, the adhesion by the foamed member can be improved, and the foamed member can be used as a sealing material having high functionality. it can.
- a foamed member for example, a sealing material for electrical / electronic devices
- the reworkability of the foamed member can be achieved by forming a crosslinked polyester resin layer in a crosslinked form using a crosslinking agent. Can be improved.
- the thermoplastic polyester-based resin layer preferably has a form (or structure) in which the thermoplastic polyester-based resin is crosslinked by a crosslinking agent.
- the thermoplastic polyester-based resin layer has a form in which the thermoplastic polyester-based resin is cross-linked by a crosslinking agent
- the thermoplastic polyester-based resin layer is in a form in which the thermoplastic polyester-based resin layer is in contact with the adherend.
- adhesion to an adherend especially a resin board
- thermoplastic polyester-based resin layer when the adhesiveness between the thermoplastic polyester-based resin layer and the carrier tape is high, the foamable member is not sufficiently peelable from the carrier tape.
- a filler may be contained therein.
- thermoplastic polyester-based resin composition for forming the thermoplastic polyester-based resin layer, a crosslinking agent, a filler, a flame retardant, an anti-aging agent, Well-known additives such as antistatic agents may be blended!
- the crosslinking agent is not particularly limited, and for example, isocyanate-based crosslinking agent, epoxy-based crosslinking agent, melamine-based crosslinking agent, aziridine-based crosslinking agent, oxazoline-based crosslinking agent, carbodiimide-based crosslinking agent, activity Methylol crosslinking agent, active alkoxymethyl crosslinking agent, metal chelate crosslinking agent, metal alkoxide crosslinking agent, metal salt crosslinking agent, peroxide crosslinking agent, urea crosslinking agent, amino crosslinking agent, coupling agent And other crosslinking agents (such as silane coupling agents).
- an isocyanate crosslinking agent or an epoxy crosslinking agent can be preferably used.
- the cross-linking agents can be used alone or in combination of two or more.
- the isocyanate crosslinking agent for example, aliphatic polyisocyanates (for example, 1,4-tetramethylene diisocyanate, 1,6-hexamethylene diisocyanate, Lysine diisocyanate), alicyclic polyisocyanates (eg cyclopentyl diisocyanate, cyclohexyl diisocyanate, isophorone diisocyanate), aromatic polyisocyanates (eg For example, 2,4-tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, etc., araliphatic polyisocyanates (eg, xylylene-1,4-diene)
- aliphatic polyisocyanates for example, 1,4-tetramethylene diisocyanate, 1,6-he
- trimer, reaction product or polymer for example, trimethylolpropan / tolylene diisocyanate trimer adduct (trade name “Coronate L” manufactured by Nippon Polyurethane Industry Co., Ltd.), trimethylolpropane / hexame Chirene diisocyanate trimer adducts (trade name “Coronate HL” manufactured by Nippon Polyurethane Industry Co., Ltd.), hexamethylenediocyanate isocyanurate (trade name “Coronate HX” manufactured by Nippon Polyurethane Industry Co., Ltd.) Etc.), polyether polyisocyanate, polyester polyisocyanate and the like.
- trimethylolpropan / tolylene diisocyanate trimer adduct trade name “Coronate L” manufactured by Nippon Polyurethane Industry Co., Ltd.
- trimethylolpropane / hexame Chirene diisocyanate trimer adducts
- epoxy-based cross-linking agent examples include polyethylene glycol diglycidyl ether, polyglycerol polyglycidyl ether, glycerin diglycidyl ether, diglycidyl ether, trimethylolpropane triglycidyl ether, diglycidyl dilin, N, N, ⁇ ', ⁇ '—tetraglycidyl-m-xylenediamine (trade name “TETRAD—X” manufactured by Mitsubishi Gas Co., Ltd., etc.), 1,3-bis (N, N-glycidylaminomethyl) cyclohexane ( Trade name “TETRAD-C” manufactured by Mitsubishi Gas Chemical Co., Ltd.), 1,6-hexanediol diglycidyl ether, and various epoxy resins.
- examples of the melamine-based cross-linking agent include hexamethylol melamine
- examples of the aziridine-based cross-linking agent include the trade name “HDU” (manufactured by Mutual Yakuhin Co., Ltd.) and the trade name “TAZM” (mutual drug). Manufactured by Kogyo Co., Ltd.) and trade name “TAZO” manufactured by Soyaku Pharmaceutical Co., Ltd.
- the amount of the crosslinking agent used can be appropriately selected depending on the type of thermoplastic polyester resin, and is, for example, 0.01 to 15 parts by weight with respect to 100 parts by weight of the thermoplastic polyester resin. In particular, it is preferred that 0.1 to: LO parts by weight.
- Cross-linking When the content of the agent is less than 0.01 parts by weight with respect to 100 parts by weight of the thermoplastic polyester resin, crosslinking by the crosslinking agent is insufficient, and the cohesive force of the thermoplastic polyester resin is reduced. The foamed member may not be able to exhibit sufficient reworkability. On the other hand, if it exceeds 15 parts by weight, the cohesive force of the thermoplastic polyester-based resin layer becomes large and hard, and the sealing property of the foamed member decreases. There is a case.
- the filler is not particularly limited, and can be appropriately selected from known fillers.
- the fillers can be used alone or in combination of two or more.
- powder particles can be suitably used as the filler.
- powder particles for example, powder particles having an average particle diameter (particle diameter) of about 0.1 to about LO / zm can be used.
- the powder particles include powdered talc, silli force, alumina, zeolite, calcium carbonate, magnesium carbonate, barium sulfate, zinc oxide, titanium oxide, hydroxide aluminum hydroxide, magnesium hydroxide, my strength,
- examples include clay such as montmorillonite, carbon particles, glass fiber, and carbon tube.
- a flame retardant can also be used as a filler.
- inorganic flame retardant is preferred.
- the inorganic flame retardant may be, for example, a chlorine flame retardant, a bromine flame retardant, a phosphorus flame retardant, an antimony flame retardant, etc., but a chlorine flame retardant or bromine flame retardant is used during combustion. It generates gas components that are harmful to the human body and corrosive to equipment.
- Phosphorus flame retardants and antimony flame retardants have problems such as toxicity and explosive properties.
- An antimony inorganic flame retardant can be preferably used.
- non-halogen non-antimony inorganic flame retardants include hydrated metals such as aluminum hydroxide, magnesium hydroxide, magnesium oxide / nickel oxide hydrate, magnesium oxide / zinc oxide hydrate, etc. Compound etc. are mentioned.
- the hydrated metal oxide may be surface treated.
- the thermoplastic polyester-based resin layer comprises a thermoplastic polyester-based resin composition containing a thermoplastic polyester-based resin and, if necessary, additives such as a crosslinking agent and a filler. It can be formed by coating on top and drying or curing as necessary.
- thermoplastic polyester resin or a composition thereof is applied to the thermoplastic polyester.
- the coating amount (solid content or dry weight) of the thermoplastic polyester resin or its composition is not particularly limited, and is, for example, 1 to 25 gZm 2 (preferably 5 A range force of ⁇ 20 g / m 2 ) can also be selected as appropriate.
- the thermoplastic elastomer resin layer is not particularly limited as long as it is a layer formed of thermoplastic elastomer resin.
- the thermoplastic elastomer resin that constitutes the thermoplastic elastomer resin layer can be appropriately selected from known thermoplastic elastomer resins.
- the thermoplastic elastomer resin is usually composed of a hard segment portion and a soft segment portion.
- thermoplastic elastomer resin is a styrene-isoprene-styrene thermoplastic elastomer resin
- a repeating unit (mono) in the styrene-isoprene-styrene thermoplastic elastomer resin corresponds to the hard segment part
- the repeating unit by the isoprene component corresponds to the soft segment part.
- the ratio of the hard segment portion and the soft segment portion in the thermoplastic elastomer resin is not particularly limited, but the content ratio of the hard segment portion in the thermoplastic elastomer resin is 50 mol. % Is preferred, especially less than 30 mol%.
- thermoplastic elastomer resin with a hard segment content of less than 50 mol% as the thermoplastic elastomer resin, adverse effects on the elongation and flexibility of the thermoplastic resin foam layer in the foam member Can be effectively suppressed or prevented.
- the thermoplastic elastomer resin includes, for example, a styrene thermoplastic elastomer resin, an olefin thermoplastic elastomer resin, a polyester thermoplastic elastomer resin, and a polyamide thermoplastic elastomer resin.
- a styrene thermoplastic elastomer resin examples thereof include fats, urethane-based thermoplastic elastomer resins, salt-bulb-based thermoplastic elastomer resins, and Gen-based thermoplastic elastomer resins.
- a styrene-based thermoplastic elastomer resin can be suitably used.
- the thermoplastic elastomer resin can be used alone or in combination of two or more.
- styrene-based thermoplastic elastomer resin examples include styrene isoprene, styrene-based thermoplastic elastomer resin (SIS-based thermoplastic elastomer resin), and styrene.
- SIS-based thermoplastic elastomer resin styrene-based thermoplastic elastomer resin
- -Butadiene Styrenic thermoplastic elastomer resin SBS thermoplastic elastomer resin
- SEBS thermoplastic elastomer resin Styrene ethylene-butene Styrenic thermoplastic elastomer resin
- SEBS thermoplastic elastomer resin Styrene ethylene Propylene Styrenic thermoplastic elastomer
- rosin SEPS thermoplastic elastomer rosin
- a SIS-based thermoplastic elastomer resin is particularly suitable.
- thermoplastic elastomer resin for example, a series of trade name "SIS” manufactured by JSR [for example, trade name "SIS5405" (SIS thermoplastic elastomer resin; containing styrene component) ratio: 18 mol%), trade name "SIS5002" (SIS-based thermoplastic elastomer one ⁇ ; content ratio of styrene components: 22 mol 0/0), etc.] and the series of Kurarene soil under the trade name "Septon” [e.g. The trade name “Septon 2104” (SIS thermoplastic elastomer resin; styrene component content ratio: 65 mol%) and the like can be suitably used.
- the content ratio of the styrene component in the SIS-based thermoplastic elastomer ⁇ means the proportion of the repeating unit by the styrene component to the total repeating units in the SIS-based thermoplastic gills Sutoma ⁇ (mol 0/0) .
- thermoplastic elastomer resin composition for forming a thermoplastic elastomer monowax layer a known additive (for example, filler, flame retardant, anti-aging agent, antistatic agent) Agents, cross-linking agents, etc.) may be blended.
- a known additive for example, filler, flame retardant, anti-aging agent, antistatic agent
- Agents, cross-linking agents, etc. may be blended.
- thermoplastic elastomer resin layer is formed by applying a thermoplastic elastomer resin composition containing a thermoplastic elastomer resin and, if necessary, various additives on a predetermined surface. Accordingly, it can be formed by drying or curing.
- the amount of the thermoplastic elastomer resin or the composition applied (solid or dried) Weight) is not particularly limited, and is the same as in the case of thermoplastic polyester resin or composition thereof, for example, in the range of 1 to 25 g / m 2 (preferably 5 to 20 g / m 2 ). can do.
- thermoplastic resin foam layer After the thermoplastic resin foam layer is impregnated with a high-pressure inert gas into the thermoplastic resin, It is composed of a thermoplastic resin foam formed through a pressure reducing step.
- the foaming method is an environmentally friendly method in that such a foaming agent is not used.
- the residue of the foaming gas remains in the foamed body.
- thermoplastic resin foam is formed by impregnating a thermoplastic resin with a high-pressure inert gas and then reducing the pressure, thereby forming a thermoplastic resin foam.
- a thermoplastic resin foam layer is used as a thermoplastic resin foam layer.
- the pre-molded unfoamed molded product may be impregnated with the inert gas, or the molten thermoplastic resin (molten polymer) is pressurized. You may impregnate under.
- thermoplastic resin foam for example, a method in which a thermoplastic resin is impregnated with a high-pressure inert gas and then decompressed, a thermoplastic resin is formed.
- thermoplastic resin which is a material of the foam (resin foam)
- thermoplastic polymer which is a material of the foam (resin foam)
- thermoplasticity is a polymer exhibiting thermoplasticity and can be impregnated with a high-pressure gas. If it is a thing, it will not restrict
- thermoplastic resin examples include low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, copolymers of ethylene and propylene, ethylene or propylene and other a-olefins (for example, , Butene-1, pentene 1, hexene 1, 4-methylpentene 1, etc.), ethylene and other ethylenically unsaturated monomers (eg vinyl acetate, acrylic acid, Polyolefin resins such as copolymers with acrylic acid esters, methacrylic acid, methacrylic acid esters, butyl alcohol, etc .; Styrene resins such as polystyrene, acrylonitrile-butadiene-styrene copolymers (ABS resin); Polyamide resins such as 6 nylon, 66 nylon and 12 nylon; polyamideimide; polyurethane; polyimide; polyetherimide; acrylic resin such as polymethylmethacrylate; polysalt vinyl; polyvinyl
- thermoplastic resin polyolefin-based resin
- Polyolefin-based resin has a broad molecular weight distribution and has a shoulder on the high molecular weight side.
- fats finely-crosslinked types (slightly cross-linked types), and long-chain branched types.
- a rubber component and Z or a thermoplastic elastomer component are used together with the thermoplastic resin.
- the ratio of the rubber component and one component of Z or thermoplastic elastomer is not particularly limited.
- a polyolefin-based ⁇ as thermoplastic ⁇ , mixing ratio of the mixture of the rubber component and Z or thermoplastic elastomer single-component (wt 0/0), for example, the former Z latter 1Z99 ⁇ 99Z1 (preferably 10Z90 ⁇ It may be 90Z10, more preferably 20 to 80 to 20).
- thermoplastic When the ratio of the rubber component and the cocoon or the thermoplastic elastomer component to the mixture of the thermoplastic resin and the rubber component and the cocoon or thermoplastic elastomer component is less than 1% by weight, the thermoplastic On the other hand, if the cushioning property of the fat foam is lowered, if it exceeds 99% by weight, outgassing tends to occur at the time of foaming, making it difficult to obtain a highly foamable foam.
- the rubber component or thermoplastic elastomer component is not particularly limited as long as it has rubber elasticity and can be foamed.
- natural rubber polyisobutylene, polyisoprene.
- Natural or synthetic rubber such as chloroprene rubber, butyl rubber, nitrile butyl rubber; olefin elastomer such as ethylene-propylene copolymer, ethylene propylene copolymer, ethylene acetate butyl copolymer, polybutene, chlorinated polyethylene; Styrene elastomers such as tylene butadiene styrene copolymers, styrene isoprene styrene copolymers, and hydrogenated products thereof; polyester elastomers; polyamide elastomers; various thermoplastic elastomers such as polyurethane elastomers Etc.
- These rubber components or thermoplastic elastomer components can be used alone or in combination of two or more.
- These rubber components and thermoplastic elastomer components for example, have a glass transition temperature of room temperature or lower (for example, 20 ° C or lower), so that they are remarkably excellent in flexibility and shape followability when used as a dustproof material or a sealing material. .
- olefin-based elastomer can be suitably used as the rubber component and Z or thermoplastic elastomer component used together with the thermoplastic resin.
- Olefin elastomers usually have a microphase-separated structure of olefin resin components and ethylene propylene rubber, and have good compatibility with polyolefin resin used as thermoplastic resins. It is.
- the thermoplastic resin foam (or the thermoplastic resin foam layer) contains fine particles and powder particles.
- the powder particles can function as a foam nucleating agent during foam molding. Therefore, a good foamed thermoplastic resin foam can be obtained by blending the powder particles.
- powder particles include nodular talc, silica, alumina, zeolite, calcium carbonate, magnesium carbonate, barium sulfate, zinc oxide, titanium oxide, aluminum hydroxide, magnesium hydroxide, and my strength.
- Clay such as montmorillonite, carbon particles, glass fiber, carbon tube and the like can be used.
- the powder particles can be used alone or in combination of two or more.
- powder particles having an average particle size (particle size) of about 0.1 to 20 ⁇ m can be suitably used as the single particles. If the average particle size of the powder particles is less than 0.1 ⁇ m, it may not function sufficiently as a nucleating agent. If the particle size exceeds 20 ⁇ m, it may cause gas loss during foaming. .
- the blending amount of the noda particles is not particularly limited !, but, for example, with respect to 100 parts by weight of the total amount of thermoplastic resin and rubber component and one component of Z or thermoplastic elastomer is 0. It can be appropriately selected from the range of 1 to 150 parts by weight (preferably 1 to 130 parts by weight, more preferably 2 to 50 parts by weight).
- thermoplastic resin foam composition When the blending amount of Noda particles is less than 0.1 parts by weight with respect to 100 parts by weight of thermoplastic resin, it becomes difficult to obtain a uniform foam, whereas when it exceeds 150 parts by weight, The viscosity of the foamed structure composition (thermoplastic resin foam composition) is significantly increased, and gas may be released during foam formation, which may impair foaming characteristics.
- thermoplastic resin foam is composed of thermoplastic resin, it has the property of being easily burnt (which is of course a drawback). Therefore, especially in applications where it is indispensable to impart flame retardancy to foamed members such as electrical and electronic equipment, powder particles having flame retardancy (for example, various powdery flame retardants) are used as powder particles. Etc.) is preferable.
- the flame retardant can be used with powder particles other than the flame retardant.
- an inorganic flame retardant is suitable as the flame retardant in the noda-shaped flame retardant.
- the inorganic flame retardant may be, for example, a brominated flame retardant, a chlorinated flame retardant, a phosphorus flame retardant, an antimony flame retardant, etc. It produces gas components that are harmful to the equipment and corrosive to equipment.
- phosphorous and antimony flame retardants have problems such as toxicity and explosive properties.
- a non-antimony inorganic flame retardant can be preferably used.
- Non-halogen-non-antimony inorganic flame retardants include, for example, hydrated metal compounds such as aluminum hydroxide, magnesium hydroxide, magnesium oxide / nickel oxide hydrate, magnesium oxide / zinc oxide hydrate, etc. Is mentioned.
- the hydrated metal oxide may be surface-treated. Flame retardants can be used alone or in combination of two or more.
- the amount of the flame retardant used is not particularly limited, and for example, 10 to 70% by weight with respect to the total amount of the foam structure composition (thermoplastic foam composition).
- a range force of (preferably 25 to 65% by weight) can also be appropriately selected. If the amount of flame retardant used is too small, the flame retardant effect will be reduced, and conversely if too much, it will be difficult to obtain a highly foamed foam. become.
- additives may be blended in the foam structure composition (thermoplastic resin foam composition), if necessary.
- type of additive that is added to the thermoplastic resin as needed, and various additives that are commonly used in foam molding can be used.
- additives for example, cell nucleating agents, crystal nucleating agents, plasticizers, lubricants, colorants (pigments, dyes, etc.), ultraviolet absorbers, antioxidants, anti-aging agents, fillers, reinforcing agents And antistatic agents, surfactants, tension modifiers, shrinkage inhibitors, fluidity modifiers, clays, vulcanizing agents, surface treatment agents, and various forms of flame retardants other than powder.
- the addition amount of the additive can be appropriately selected within a range not impairing the formation of bubbles and the like, and the addition amount used in the molding of a normal thermoplastic resin can be adopted.
- the inert gas used in forming the thermoplastic resin foam is not particularly limited as long as it is inert and impregnable with respect to the thermoplastic resin, for example, Examples include carbon dioxide, nitrogen gas, and air. These gases may be mixed and used. Of these, from the viewpoint of a high impregnation rate with a large amount of impregnation into the thermoplastic resin used as the material of the foam, carbon dioxide dioxide can be suitably used.
- the high-pressure inert gas (especially carbon dioxide) is preferably in a supercritical state.
- the solubility of the gas in the thermoplastic resin increases, and a high concentration can be mixed.
- the generation of bubble nuclei increases, and the density of bubbles formed by the growth of the bubble nuclei is the porosity. Even if they are the same, they become large, and fine bubbles can be obtained.
- Carbon dioxide has a critical temperature of 31 ° C and a critical pressure of 7.4 MPa.
- thermoplastic resin foam When a foam is produced by impregnating thermoplastic resin with a high-pressure inert gas, the composition for thermoplastic resin foam is preliminarily formed into an appropriate shape such as a sheet. After forming into a non-foamed resin molded product (unfoamed molded product), this non-foamed resin molded product is impregnated with a high-pressure inert gas and foamed by releasing the pressure.
- the composition for a foamed resin foam may be kneaded together with a high-pressure inert gas under pressure, and may be molded in a continuous manner in which the pressure is released and molding and foaming are performed simultaneously.
- an inert gas may be impregnated with a preformed non-foamed resin molded product, or a melted thermoplastic resin may be impregnated with an inert gas under pressure and then decompressed. May be subjected to molding.
- thermoplastic resin foam composition foam structure composition
- thermoplastic resin foam composition containing a thermoplastic elastomer component and powder particles and other additives that are used as necessary is converted into a single-screw extruder
- a molding method using an extruder such as a twin-screw extruder, and a kneading machine provided with blades such as a roller, a cam, a kneader, a Banbury type, etc. using the same composition for thermoplastic resin foam as described above.
- a method in which the mixture is uniformly mixed and press-molded to a predetermined thickness using a hot plate press or the like, or a method in which an injection molding machine is used What is necessary is just to shape
- the unfoamed resin molded product (molded product made of the composition for thermoplastic resin foam) thus obtained is placed in a pressure-resistant container (high-pressure container), and a high-pressure inert gas (such as carbon dioxide) is introduced.
- thermoplastic resin foam can be obtained by rapidly cooling with cold water or the like as necessary and fixing the shape.
- the shape of the unfoamed resin molded product is not particularly limited, and may be any of a roll shape, a plate shape, and the like.
- the introduction of the high-pressure inert gas may be performed continuously or discontinuously.
- publicly known or commonly used methods such as a water bath, an oil bath, a hot roll, a hot air oven, a far infrared ray, a near infrared ray, and a microwave can be adopted.
- the non-foamed resin molded product (unfoamed molded product) to be used for foaming is not limited to a sheet-like product, and can be used in various shapes (for example, prismatic shape) depending on the application. .
- non-foamed resin molded products used for foaming can be formed by other molding methods besides extrusion molding, press molding, and injection molding. It can be done by making it.
- thermoplastic resin foam in a continuous manner, for example,
- a composition for a foamed foam of thermoplastic resin containing a rubber component and Z or a thermoplastic elastomer component used as necessary, and powder particles and other additives used as necessary (foam structure) Body composition) is injected (introduced) with high-pressure inert gas (such as diacid-carbon) while mixing using an extruder such as a single-screw extruder or twin-screw extruder.
- high-pressure inert gas such as diacid-carbon
- the pressure is released by extruding the thermoplastic resin foam composition through a kneading impregnation process in which a high-pressure inert gas is impregnated into the thermoplastic resin and a die provided at the tip of the extruder (usually, Up to atmospheric pressure), and can be produced by a molding decompression process in which molding and foaming are performed simultaneously.
- a heating step for growing bubbles by heating may be provided. After the bubbles are grown in this manner, if necessary, they are rapidly cooled with cold water or the like, and the shape is fixed and a thermoplastic resin foam can be obtained.
- the kneading impregnation step and the molding decompression step can be performed using an injection molding machine or the like in addition to the extruder. Further, a method for obtaining a thermoplastic resin foam having a sheet shape, a prismatic shape, or any other shape may be appropriately selected.
- the mixing amount of the high-pressure inert gas is not particularly limited, and is, for example, about 2 to 10% by weight with respect to the total amount of the thermoplastic resin component. Mix and adjust as appropriate to obtain the desired density and expansion ratio.
- the pressure when impregnating the high-pressure inert gas into the non-foamed resin molded product or the composition for thermoplastic resin foam is inert. It can be selected as appropriate in consideration of the type and operability of the gas. For example, in the case where carbon dioxide is used as the inert gas, it is 6 MPa or more (eg, about 6 to: LOOMPa), preferably 8 MPa or more. (For example, about 8 to 100 MPa) is preferable.
- the bubble diameter at which foaming grows during foaming becomes too large, and disadvantages such as a decrease in the dustproof effect are likely to occur. This is because when the pressure is low, the amount of inert gas impregnated is relatively small compared to when the pressure is high, and the bubble nucleation rate decreases, resulting in fewer bubble nuclei. On the contrary, the bubble diameter becomes extremely large by increasing. In the pressure range lower than 6 MPa, Since the bubble diameter and bubble density change greatly only by slightly changing the impregnation pressure, it is difficult to control the bubble diameter and bubble density.
- the impregnation temperature in the case of impregnating a sheet-like unfoamed resin molded article with a high-pressure inert gas is about 10 to 200 ° C (preferably 40 to 200 ° C). is there.
- the temperature when injecting and kneading a high-pressure inert gas into a thermoplastic resin composition is generally about 60 to 350 ° C. It is.
- the temperature during impregnation is 32 ° C or higher (especially 40 ° C or higher) in order to maintain a supercritical state. I prefer that.
- the pressure reducing speed is not particularly limited, but is preferably about 5 to 300 MPaZ seconds in order to obtain uniform fine bubbles.
- the heating temperature in the heating step is, for example, about 40 to 250 ° C. (preferably 60 to 250 ° C.).
- thermoplastic resin foam having a high expansion ratio can be produced, and thus a thick thermoplastic resin foam is produced. It has the advantage that it can be done.
- the gap of the die attached to the tip of the extruder is as narrow as possible (usually 0. 1 to 1. Omm). Therefore, in order to obtain a thick thermoplastic resin foam, the thermoplastic resin foam composition extruded through a narrow gap must be foamed at a high ratio and a high ratio!
- the thickness of the formed foam was limited to a thin one (for example, about 0.5 to 2 Omm).
- a thermoplastic resin foam produced using a high-pressure inert gas can continuously obtain a foam having a final thickness of 0.50 to 5.00 mm. is there.
- the relative density of the thermoplastic resin foam density after foaming Z unfoamed It is desirable that the density in the state is 0.02 to 0.3 (preferably 0.05 to 0.25). If the relative density exceeds 0.3, foaming is insufficient, and if it is less than 0.02, the strength of the foam may be remarkably lowered.
- the apparent density of the thermoplastic resin foam can be appropriately set according to the purpose of use, but is 0.2 gZcm 3 or less (preferably 0.15 gZcm 3 or less, more preferably 0.13 gZcm 3 or less).
- the lower limit of the apparent density of the thermoplastic resin foam (or thermoplastic resin foam layer) is preferably 0.02 g / cm 3 or more (preferably 0.03 g / cm 3 or more).
- the apparent density of the thermoplastic resin foam (or thermoplastic resin foam layer) can be controlled by adjusting the expansion ratio by the amount of inert gas to be impregnated and the pressure.
- the foam structure such as the closed cell structure or open cell structure of the thermoplastic resin foam foam or the mixed cell structure can be controlled through adjustment of the foam ratio.
- the apparent density of the thermoplastic resin foam exceeds 0.20 gZcm 3 , foaming becomes insufficient.
- the apparent density is less than 0.02 gZcm 3 , the thermoplastic resin
- the strength of the foam (or thermoplastic resin foam layer) may be significantly reduced, which is not preferable.
- the apparent density of the thermoplastic resin foam is a sample obtained by punching a thermoplastic resin foam with a punching blade type of 40 mm x 40 mm. Measure the dimensions. Also, measure the thickness using a 1/100 dial gauge with a measuring terminal diameter ( ⁇ ) of 20 mm. From these values, the volume of the thermoplastic resin foam is calculated. Next, the weight of the thermoplastic resin foam is measured with an upper pan balance having a minimum scale of 0. Olg or more. From these values, the apparent density (g / cm 3 ) of the thermoplastic resin foam is calculated.
- thermoplastic resin foam or thermoplastic resin foam layer
- the thickness, relative density, and apparent density of the above-mentioned thermoplastic resin foam are determined depending on the inert gas, thermoplastic resin, rubber component and Z or thermoplastic used.
- operating conditions such as temperature, pressure, and time in the gas impregnation process and kneading impregnation process
- operating conditions such as decompression speed, temperature, and pressure in the decompression process and molding decompression process, decompression It can be adjusted by appropriately selecting and setting the heating temperature or the like in the heating step after or after the molding pressure reduction.
- thermoplastic resin foam or thermoplastic resin foam layer
- a closed cell structure and a semi-continuous semi-closed cell structure are preferred.
- Thermoplastic A closed cell structure having a closed cell structure of 80% or more (in particular, 90% or more) in the resin foam is preferable.
- the shape, thickness, and the like of the foamed member of the present invention are not particularly limited, and can be appropriately selected depending on the application.
- the thickness of the foam member can be selected from a range of about 0.5 to 5 mm (preferably 0.8 to 3 mm).
- the foamed member is usually processed into various shapes according to the apparatus to be used and commercialized. At this time, processing, conveyance, and the like can be performed in a state where the foamed member is adhered to the carrier tape (that is, the foamed member is held by the carrier tape to form a foamed member laminate).
- the foamed member laminate of the present invention has a configuration in which the foamed member is held by a carrier tape.
- the foamed member is used as the foamed member, and the foamed member is a carrier tape. It has a configuration in which the surface of the polyester-based resin layer or thermoplastic elastomer resin layer and the adhesive surface of the carrier tape are in contact with each other.
- the foamed member laminate has a configuration in which the foamed member is adhered to the adhesive surface of the carrier tape, the foamed member is processed with the foamed member adhered to the adhesive surface on the carrier tape.
- the surface of the thermoplastic polyester resin layer or the thermoplastic elastomer resin layer of the foam member is adhered to the adhesive surface of the carrier tape.
- foam foaming can be easily peeled off from the carrier tape by suppressing or preventing foam breakage.
- the carrier tape is not particularly limited, but it is important to have an adhesive surface.
- the carrier tape exhibits an adhesive force (adhesive force) sufficient to hold the foamed member when the foamed member is processed or transported, while the foamed member is peeled off when the foamed member is peeled off. It is important to be able to exert an adhesive force (adhesive force) that can be easily peeled without destroying the surface of the film.
- an adhesive tape having an adhesive layer made of various adhesives is based on an acrylic adhesive having a (meth) acrylic alkyl ester as the main component of the pressure-sensitive adhesive, in view of achieving both adhesiveness and peelability to the foamed member.
- An acrylic pressure-sensitive adhesive tape or sheet having an acrylic pressure-sensitive adhesive layer can be suitably used.
- examples of the pressure-sensitive adhesive other than the acrylic pressure-sensitive adhesive include rubber-based pressure-sensitive adhesives (natural rubber-based pressure-sensitive adhesives, synthetic rubber-based pressure-sensitive adhesives), silicones, and the like. System adhesives, polyester adhesives, urethane adhesives, polyamide adhesives, epoxy adhesives, bull alkyl ether adhesives, fluorine adhesives, and the like.
- the pressure-sensitive adhesive may be a hot-melt pressure-sensitive adhesive.
- the pressure-sensitive adhesive can be used alone or in combination of two or more.
- the pressure-sensitive adhesive may be any type of pressure-sensitive adhesive such as emulsion-based pressure-sensitive adhesive, solvent-based pressure-sensitive adhesive, oligomer-based pressure-sensitive adhesive, or solid-based pressure-sensitive adhesive.
- the base material in the adhesive tape or sheet is not particularly limited, for example, a plastic base material such as a plastic film or sheet; a paper base material such as paper; a cloth, a non-woven cloth, a net Fiber base materials such as metal foils, metal base materials such as metal plates, rubber base materials such as rubber sheets, foams such as foam sheets, and laminates thereof (particularly plastic base materials and others)
- a plastic base material such as a plastic film or sheet
- a paper base material such as paper
- cloth, a non-woven cloth a net Fiber base materials
- metal foils metal base materials
- metal base materials such as metal plates
- rubber base materials such as rubber sheets
- foams such as foam sheets
- laminates thereof particularly plastic base materials and others
- Appropriate thin leaf bodies such as a laminate with a base material or a laminate of plastic films (or sheets) can be used.
- the thickness of the adhesive layer or the like in the adhesive tape or sheet as the carrier tape is not particularly limited.
- the foamed member laminate of the present invention is used to process the foamed member so as to have a predetermined shape
- the foamed member is separated from the carrier tape to isolate the foamed member. it can.
- the foamed member thus isolated is peeled off at the interface between the foamed member and the carrier tape, and there is little or no foam breakage that causes breakage in the foam of the foamed member. It retains a good foam structure and is added to a predetermined shape. Therefore, the foamed member processed and isolated using the foamed member laminate Is useful as a dustproof material used when attaching (attaching) various members or parts to a predetermined part. In particular, the foamed member can be suitably used even when a small member or component is mounted on a thin product.
- Various members or parts that can be attached (mounted) using a foamed member are not particularly limited, and examples thereof include various members or parts in electrical and electronic devices.
- Examples of such a member or component for an electric / electronic device include an image display member (particularly, a small image display member) mounted on an image display device such as a liquid crystal display, an electroluminescence display, and a plasma display.
- Examples include optical members or optical parts such as cameras and lenses (particularly small cameras and lenses) that are mounted on mobile communication devices such as so-called “mobile phones” and “portable information terminals”.
- the foam member can also be used as a dustproof material for preventing toner from leaking from the toner cartridge.
- examples of the toner cartridge that can be attached using the foam member include a toner cartridge used in an image forming apparatus such as a copying machine or a printer.
- the electrical / electronic devices of the present invention have a configuration in which a foam member is used, and the foam member is used as a foam member.
- a foamed member for example, it can be used as a dustproof material (seal material).
- Such electric / electronic devices usually have a configuration in which members or parts for electric and electronic devices are attached (attached) to a predetermined site via a foam member.
- an image display device such as a liquid crystal display, an electoluminescence display, a plasma display or the like as an optical member or component (particularly, a small image display member is mounted as an optical member).
- Electronic devices e.g., V, so-called ⁇ portable ''
- a camera or lens especially a small power camera or lens
- Mobile communication devices such as “telephone” and “portable information terminal”).
- Such electric / electronic devices may be thinner than conventional products, and the thickness and shape thereof are not particularly limited.
- thermoplastic resin foam layer As the foam member, at least one surface (single surface or one surface) of the thermoplastic resin foam layer is used. May have a structure in which a thermoplastic polyester-based resin layer and a Z or thermoplastic elastomer resin layer are formed on both sides).
- MFR Melt flow rate
- the pellets were put into a single screw extruder manufactured by Nippon Steel Works, and carbon dioxide gas was injected in a 220 ° C atmosphere at a pressure of 22 (19 after injection) MPa / cm 2 . After sufficiently saturating the carbon dioxide gas and cooling to a temperature suitable for foaming, die force extrusion was performed to obtain a foam (foamed structure). In this foam, the apparent density was 0.12 gZcm 3 and the thickness was 1.5 mm. The foam was sliced to obtain a foam having a thickness of 0.5 mm (sometimes referred to as “foam structure A”).
- the foamed member was obtained by heating and drying at 110 ° C. for 3 minutes to form a thermoplastic polyester resin layer (coat layer) on the surface of the foam structure.
- Byron 30SS manufactured by Toyobo Co., Ltd
- Example 5 and Example 5 except that it was applied at a coating amount of 18 gZm 2 in terms of dry weight (solid weight) on one surface of the foam structure A after adding 5 parts by weight to the part. Similarly, a foamed member was obtained.
- Thermoplastic elastomer ⁇ (trade name "SIS5405" manufactured by JSR Corporation; a styrene - isoprene - styrene-based thermoplastic elastomer ⁇ ; content ratio of styrene components: 18 mol 0/0), in addition to torque E down solvents, solid Dilute the partial concentration to 20% by weight and apply it to one surface of the foamed structure A with a Mayaba at a coating weight of 15gZm 2 in dry weight (solid weight), and then at 80 ° C for 3 minutes. Then, by heating and drying, a thermoplastic elastomer resin layer (coat layer) was formed on the surface of the foam structure to obtain a foam member.
- SIS5405" manufactured by JSR Corporation
- content ratio of styrene components 18 mol 0/0
- thermoplastic elastomer resin As the thermoplastic elastomer resin, the product name “SIS5405” (manufactured by CFSR) is replaced by the product name “SIS5002” (manufactured by JSR; styrene-isoprene-styrene thermoplastic elastomer resin; content ratio of styrene component: 22 In the same manner as in Example 9 except that the mol%) was used, a thermoplastic elastomer mono-resin layer (coat layer) was formed on the surface of the foam structure to obtain a foam member.
- thermoplastic elastomer resin instead of the product name “SIS5405” manufactured by CFSR as the thermoplastic elastomer resin, the product name “Septon 2104” (made by Kuraene Earth; styrene-isoprene-styrene thermoplastic elastomer resin; content ratio of styrene component: 65 In the same manner as in Example 9 except that a mol%) was used, a thermoplastic elastomer mono-resin layer (coat layer) was formed on the surface of the foam structure to obtain a foam member.
- the foam structure A was used as a foam member as it was.
- acetic acid-based oil-based emulsion (trade name “C-965” manufactured by Nippon Carbide) on one surface of foam structure A at a dry weight (solid content weight) of 20 gZm 2.
- a foamed member was obtained by heating and drying at 110 ° C. for 3 minutes to form a vinyl acetate resin layer (coat layer) on the surface of the foam structure.
- butyl acetate emuldione rosin trade name “Nitoku Sol TS-824” manufactured by Nippon Carbadoe Co., Ltd.
- the adhesive strength was measured by the following method for measuring adhesive strength, and the foamed parts according to Examples 4 to 7 and Examples 9 to 11 were used.
- the reworkability was evaluated by the following reworkability evaluation method.
- the force required to peel the foamed member is as follows: temperature: 23 ⁇ 2 ° C, humidity: 50 ⁇ 5RH%, peeling angle: 180 degrees, tensile speed: lOmZmin (high speed) Measured under each condition of (peeling) and 0.3 mZmin (low-speed peeling), the adhesive strength (NZ20 mm) was obtained, and the peeled state when peeled was visually confirmed.
- the adhesive strength (adhesive strength) at high speed peeling was evaluated using a high speed peeling tester (manufactured by Tester Sangyo Co., Ltd.) and at low speed peeling (0.3 m / min).
- Adhesive strength was evaluated using a universal tensile compression tester (trade name “TCM-lkNB” manufactured by Minebea). The measurement results are shown in the columns of “High-speed peeling” and “Low-speed peeling” in Table 1, respectively.
- the “interface” in the peeled state indicates that peeling occurs at the interface between the foamed member and the carrier tape for the foamed member
- “foam” is the foamed structure of the foamed member. Demonstrate that peeling occurs in body A (ie, foam breaks occur).
- the column “ABS” in Table 2 indicates that the adherend is an acrylic resin plate.
- the adherend is a glass plate, place it in the ⁇ Glass '' column in Table 2, and if the adherend is a stainless plate, place it in the ⁇ SUS '' column in Table 2. I showed each one.
- the foamed member according to each example was coated with a thermoplastic polyester resin or thermoplastic elastomer resin (a thermoplastic polyester resin layer or a thermoplastic elastomer resin). Layer), the strength of the surface of the foamed member can be improved, and foam breakage at the time of peeling from the carrier tape is prevented in both high-speed peeling and low-speed peeling.
- the foamed member according to Comparative Example 1 does not have a coat layer, and the foamed members according to Comparative Examples 2 to 3 have a coat layer made of butyl acetate-based resin. In the case of peeling, foam destruction has occurred, in which the surface of the foamed member is destroyed.
- thermoplastic polyester-based resin layer has a structure in which a thermoplastic polyester-based resin has a crosslinked structure. It was confirmed that reworkability was improved and more preferable results were obtained.
- the present invention provides a foam member, foam member laminate, and foam member that can suppress or prevent foam breakage when the carrier tape force is peeled even if the foam member has a high expansion ratio.
- ⁇ Provide electronic equipment.
- the present invention further provides an electric / electronic device using a foamed member, a foamed member laminate and a foamed member having excellent reworkability.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Laminated Bodies (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06731266A EP1867471A4 (en) | 2005-04-08 | 2006-04-06 | STUNNING ELEMENT, LAYERING PRODUCT WITH STUNNING ELEMENT AND STUNNING ELEMENT INSERTING ELECTRICAL / ELECTRONIC DEVICE |
CN2006800206188A CN101193741B (zh) | 2005-04-08 | 2006-04-06 | 发泡部件、发泡部件叠层体和使用发泡部件的电气/电子设备 |
US11/909,133 US8221877B2 (en) | 2005-04-08 | 2006-04-06 | Foamed member, foamed member laminate, and electric or electronic device using foamed member |
US13/490,623 US8715450B2 (en) | 2005-04-08 | 2012-06-07 | Foamed member, foamed member laminate, and electric or electronic device using foamed member |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-112415 | 2005-04-08 | ||
JP2005112415 | 2005-04-08 | ||
JP2006049538A JP4878869B2 (ja) | 2005-04-08 | 2006-02-27 | 発泡部材、発泡部材積層体及び発泡部材が用いられた電気・電子機器類 |
JP2006-049538 | 2006-02-27 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/909,133 A-371-Of-International US8221877B2 (en) | 2005-04-08 | 2006-04-06 | Foamed member, foamed member laminate, and electric or electronic device using foamed member |
US13/490,623 Continuation US8715450B2 (en) | 2005-04-08 | 2012-06-07 | Foamed member, foamed member laminate, and electric or electronic device using foamed member |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006109666A1 true WO2006109666A1 (ja) | 2006-10-19 |
Family
ID=37086942
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/307318 WO2006109666A1 (ja) | 2005-04-08 | 2006-04-06 | 発泡部材、発泡部材積層体及び発泡部材が用いられた電気・電子機器類 |
Country Status (6)
Country | Link |
---|---|
US (2) | US8221877B2 (ja) |
EP (1) | EP1867471A4 (ja) |
JP (1) | JP4878869B2 (ja) |
KR (1) | KR101002454B1 (ja) |
CN (1) | CN101193741B (ja) |
WO (1) | WO2006109666A1 (ja) |
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CN101502679B (zh) * | 2008-02-06 | 2013-06-19 | 奥林巴斯医疗株式会社 | 内窥镜用弹性体成型体 |
WO2013183662A1 (ja) * | 2012-06-07 | 2013-12-12 | 日東電工株式会社 | 樹脂発泡体及び発泡材 |
JP2014095092A (ja) * | 2014-02-07 | 2014-05-22 | Nitto Denko Corp | 樹脂発泡体及び発泡部材 |
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- 2006-04-06 KR KR1020077022795A patent/KR101002454B1/ko not_active IP Right Cessation
- 2006-04-06 CN CN2006800206188A patent/CN101193741B/zh not_active Expired - Fee Related
- 2006-04-06 US US11/909,133 patent/US8221877B2/en not_active Expired - Fee Related
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101502679B (zh) * | 2008-02-06 | 2013-06-19 | 奥林巴斯医疗株式会社 | 内窥镜用弹性体成型体 |
US20110003124A1 (en) * | 2009-07-06 | 2011-01-06 | Nitto Denko Corporation | Resin foam |
US20110262744A1 (en) * | 2010-04-26 | 2011-10-27 | Nitto Denko Corporation | Resin foam and foamed member |
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JP2014111778A (ja) * | 2014-01-31 | 2014-06-19 | Nitto Denko Corp | 樹脂発泡体及び発泡部材 |
JP2014095092A (ja) * | 2014-02-07 | 2014-05-22 | Nitto Denko Corp | 樹脂発泡体及び発泡部材 |
Also Published As
Publication number | Publication date |
---|---|
KR101002454B1 (ko) | 2010-12-17 |
EP1867471A1 (en) | 2007-12-19 |
US20120241079A1 (en) | 2012-09-27 |
KR20070121713A (ko) | 2007-12-27 |
US20090061206A1 (en) | 2009-03-05 |
CN101193741A (zh) | 2008-06-04 |
US8221877B2 (en) | 2012-07-17 |
JP4878869B2 (ja) | 2012-02-15 |
JP2006312308A (ja) | 2006-11-16 |
CN101193741B (zh) | 2010-11-24 |
EP1867471A4 (en) | 2011-05-18 |
US8715450B2 (en) | 2014-05-06 |
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