WO2020246536A1 - 伸縮フィルム - Google Patents

伸縮フィルム Download PDF

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Publication number
WO2020246536A1
WO2020246536A1 PCT/JP2020/022079 JP2020022079W WO2020246536A1 WO 2020246536 A1 WO2020246536 A1 WO 2020246536A1 JP 2020022079 W JP2020022079 W JP 2020022079W WO 2020246536 A1 WO2020246536 A1 WO 2020246536A1
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Prior art keywords
elastomer
surface layer
polypropylene
layer
ethylene
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PCT/JP2020/022079
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English (en)
French (fr)
Japanese (ja)
Inventor
平野　達也
崇暁 前田
昭裕 田中
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タキロンシーアイ株式会社
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Application filed by タキロンシーアイ株式会社 filed Critical タキロンシーアイ株式会社
Priority to JP2021524896A priority Critical patent/JP7554189B2/ja
Priority to KR1020217039862A priority patent/KR20220018970A/ko
Priority to EP20818231.1A priority patent/EP3981593A4/en
Priority to CN202080039447.3A priority patent/CN113891798B/zh
Priority to US17/615,806 priority patent/US11904578B2/en
Publication of WO2020246536A1 publication Critical patent/WO2020246536A1/ja

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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
    • B32B27/30—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
    • 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
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • 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
    • C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/104—Oxysalt, e.g. carbonate, sulfate, phosphate or nitrate particles
    • 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
    • B32B2274/00—Thermoplastic elastomer material
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/308—Heat stability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/51—Elastic
    • 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
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/16—EPDM, i.e. ethylene propylene diene monomer
    • 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
    • B32B2437/00—Clothing
    • 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
    • B32B2535/00—Medical equipment, e.g. bandage, prostheses or catheter
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • 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
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene

Definitions

  • the present invention relates to stretchable films.
  • the present application claims priority based on Japanese Patent Application No. 2019-106404 filed in Japan on June 6, 2019, the contents of which are incorporated herein by reference.
  • Elastic films are used in a wide range of fields such as hygiene products, sports products, medical products, etc. to improve handleability, wearability (fitness), etc.
  • clothes such as underwear, waistbands for disposable diapers, side panels, leg gathers, incontinence products, sanitary napkins, bandages, surgical drapes, tightening bands, hats, swimming pants, sports supporters, medical supporters, etc. Has been done.
  • Patent Document 1 discloses an elastic film in which an olefin layer containing high-density polyethylene (HDPE) or homopolypropylene (H-PP) is provided on the surface of the elastomer layer.
  • HDPE high-density polyethylene
  • H-PP homopolypropylene
  • a stretchable film using polyethylene such as HDPE for the surface layer has insufficient heat resistance, so that it is deformed when it is bonded to a back film, a non-woven fabric, etc. using, for example, a hot melt adhesive. Or holes are likely to occur. Further, it is difficult to obtain sufficient elasticity in the elastic film using H-PP for the surface layer. Although the elasticity is improved by increasing the thickness of the elastomer layer, the rigidity becomes too high, and a strong force is required for stretching.
  • An object of the present invention is to provide an elastic film having low rigidity and excellent blocking resistance, heat resistance and elasticity.
  • the present invention has the following configuration.
  • It has an elastomer layer and a surface layer provided on either or both of the first surface and the second surface of the elastomer layer, and the surface layer is a copolymer with polypropylene.
  • a certain block polypropylene, one or more polypropylene-based resins selected from the group consisting of random polypropylene which is a copolymer with ethylene, and calcium carbonate are contained, and the content of the calcium carbonate in the surface layer is the said.
  • An elastic film having a thickness of 10 to 75% by mass based on the total mass of the surface layer, a thickness of the elastomer layer of 20 to 55 ⁇ m, and a thickness of the surface layer of 0.4 to 5.0 ⁇ m.
  • an elastic film having low rigidity and excellent blocking resistance, heat resistance and elasticity.
  • the flow direction (MD) is the extrusion direction (longitudinal direction) of the strip-shaped resin film. Further, the width direction (TD) is a direction perpendicular to the flow direction (MD) along the resin film surface.
  • the elastic film of the present invention has an elastomer layer and a surface layer provided on either or both of the first surface and the second surface of the elastomer layer.
  • the elastic film embodiment of the present invention examples include the elastic films 1 and 2 illustrated in FIGS. 1 and 2.
  • the elastic film 1 includes an elastomer layer 10 and a first surface layer 20 provided on the first surface 10a of the elastomer layer 10.
  • the elastic film 2 is provided on the elastomer layer 10, the first surface layer 20 provided on the first surface 10a of the elastomer layer 10, and the second surface 10b of the elastomer layer 10. It includes a second surface layer 22.
  • the dimensions and the like in FIGS. 1 and 2 are examples, and the present invention is not necessarily limited thereto, and can be appropriately modified and implemented within the scope of the present invention defined in the claims. is there.
  • the elastomer layer is a layer containing an elastomer.
  • the elastomer refers to a polymer having rubber elasticity above the glass transition temperature. Therefore, elastomers generally have a glass transition temperature of room temperature (23 ° C.) or lower.
  • Specific examples of the elastomer include styrene-based elastomers, olefin-based elastomers, urethane-based elastomers, polyester-based elastomers, and the like. Among these, olefin-based elastomers are preferable from the viewpoint of strength and resilience. Further, a styrene-based elastomer is preferable from the viewpoint of high dimensional stability during film transportation.
  • the elastomer contained in the elastomer layer may be one type or two or more types.
  • styrene-based elastomers examples include styrene-isoprene-styrene copolymer (SIS elastomer), styrene-isoprene block copolymer, styrene-butadiene-styrene block copolymer, styrene-butadiene block copolymer, and styrene-isoprene-styrene.
  • SIS elastomer styrene-isoprene-styrene copolymer
  • SIS elastomer styrene-isoprene block copolymer
  • styrene-butadiene-styrene block copolymer styrene-butadiene block copolymer
  • styrene-isoprene-styrene examples include styrene-isoprene
  • Hydrogen additives for block copolymers styrene-ethylene-propylene-styrene block copolymers
  • hydrogen additives for styrene-butadiene-styrene block copolymers styrene-ethylene-butylene-styrene block copolymers
  • SIS elastomers are preferable because they have higher strength and resilience.
  • the styrene unit content of the SIS elastomer is preferably 14 to 48% by mass.
  • the styrene unit content of the SIS elastomer is at least the above lower limit value, the moldability is improved.
  • the styrene unit content of the SIS elastomer is not more than the above upper limit value, sufficiently high elasticity can be obtained.
  • SIS elastomer a commercially available product can be used.
  • Commercially available SIS elastomers include, for example, Quintac3390 (SIS block copolymer, glass transition temperature: -53 ° C., styrene unit content: 48% by mass, manufactured by Nippon Zeon), Quintac3620 (SIS block copolymer, glass). Transition temperature: -50 ° C, styrene unit content: 14% by mass, manufactured by Nippon Zeon Co., Ltd.) and the like.
  • the olefin-based elastomer examples include a copolymer or homopolymer containing an olefin having 3 or more carbon atoms as a main component, and a copolymer with an olefin having 3 or more carbon atoms having ethylene as a main component.
  • ⁇ -olefin copolymers such as propylene homopolymers and 1-butene copolymers having low stereoregularity; propylene-ethylene copolymers, propylene-ethylene-1-butene copolymers, etc.
  • elastomer in which the above-mentioned elastomer is dispersed in a matrix of crystalline polyolefin.
  • olefin elastomer may be used alone, or two or more types may be used in combination.
  • the olefin-based elastomer is also referred to as a "PP-based elastomer", such as a propylene-based elastomer (propylene-ethylene copolymer, etc.), which is a copolymer containing propylene as a main component or a homopolymer from the viewpoint of strength and restorability. ),
  • PP-based elastomer such as a propylene-based elastomer (propylene-ethylene copolymer, etc.), which is a copolymer containing propylene as a main component or a homopolymer from the viewpoint of strength and restorability.
  • An ethylene-octene elastomer ethylene-octene copolymer, etc. which is a copolymer containing ethylene as a main component or a homopolymer is preferable.
  • the propylene unit content with respect to all the units of the PP-based elastomer is preferably 70 to 95% by mass, more preferably 80 to 90% by mass.
  • the propylene content of the PP-based elastomer is at least the lower limit, the moldability is improved.
  • the propylene content of the PP-based elastomer is not more than the upper limit, high elasticity can be easily obtained.
  • olefin-based elastomer Commercially available products can be used as the olefin-based elastomer.
  • examples of commercially available olefin elastomers include the trade name "VISTAMAX X6102" (propylene-ethylene copolymer, ethylene unit content: 16% by mass, manufactured by ExxonMobile) and the trade name "Infuse9007” (ethylene-octene copolymer). , Dow Chemical Co., Ltd.) and the like.
  • the elastomer one selected from the group consisting of PP-based elastomers and ethylene-octene elastomers is preferable from the viewpoint of strength and resilience. However, two or more types of elastomers may be mixed and used. Further, as the elastomer, a styrene-based elastomer is preferable from the viewpoint of high dimensional stability during film transportation. However, two or more kinds of styrene-based elastomers may be mixed and used.
  • the elastomer layer may contain components other than the thermoplastic elastomer as long as the effects of the present invention are not impaired.
  • Other ingredients include, for example, weather stabilizers, antistatic agents, antifogging agents, metal soaps, waxes, fungicides, antibacterial agents, nucleating agents, flame retardants, UV absorbers, light stabilizers, antioxidants. , Additives such as discoloration inhibitors, pigments, dyes, fillers and the like.
  • the thickness of the elastomer layer is 20 to 55 ⁇ m, preferably 25 to 53 ⁇ m, and more preferably 30 to 50 ⁇ m.
  • the elastomer layer may be a single layer or a plurality of layers.
  • the elastomer layer is a multi-layer, the total thickness of the elastomer layers is within the above range.
  • the elastomer layer is a plurality of layers, the components of the different elastomer layers may be the same or different.
  • the surface layer is block polypropylene (hereinafter, also referred to as "B-PP") which is a copolymer with ethylene, and random polypropylene which is a copolymer with ethylene (hereinafter, also referred to as "R-PP"). It is a layer containing one or more kinds of polypropylene-based resins (hereinafter, also referred to as “polypropylene-based resin (B)”) selected from the group consisting of, and calcium carbonate.
  • polypropylene-based resin (B) contained in the surface layer may be of one type or two or more types.
  • the polypropylene-based resin (B) contained in the first surface layer and the polypropylene-based resin (B) contained in the second surface layer are the same. It may be different.
  • H-PP is a homopolymer of propylene and has high crystallinity due to its high taxity. Therefore, the film using H-PP tends to have high rigidity and lack flexibility.
  • R-PP is copolymerized with ethylene with propylene, its taxity is lower and its crystallinity is lower than that of H-PP, so that it has excellent flexibility and heat resistance.
  • B-PP forms a sea-island structure composed of a polypropylene sea part and an ethylene island part, and forms an EPR phase at the boundary of the sea-island while maintaining heat resistance equivalent to that of H-PP. By doing so, it also has flexibility.
  • the melting point of the polypropylene-based resin (B) is preferably less than 160 ° C, more preferably 135 ° C or higher and lower than 160 ° C. If the melting point of the polypropylene-based resin (B) is less than 160 ° C., the polypropylene-based resin (B) contains an ethylene resin that requires it, and the polypropylene-based resin (B) has excellent flexibility. Excellent in sex. When the melting point of the polypropylene-based resin (B) is 135 ° C. or higher, the polypropylene-based resin (B) contains the required propylene resin and has excellent heat resistance. The melting point is the peak temperature measured by the differential scanning calorimetry (DSC) method.
  • DSC differential scanning calorimetry
  • the content of the polypropylene-based resin (B) in the surface layer is preferably 25 to 90% by mass, more preferably 27 to 80% by mass, still more preferably 30 to 70% by mass, based on the total mass of the surface layer. ..
  • the content of the polypropylene-based resin (B) is at least the lower limit of the above range, the heat resistance is excellent.
  • the content of the polypropylene-based resin (B) is not more than the upper limit of the above range, the rigidity is low and the elasticity is excellent.
  • the content of calcium carbonate in the surface layer is 10 to 75% by mass, preferably 20 to 73% by mass, and more preferably 30 to 70% by mass with respect to the total mass of the surface layer.
  • the content of calcium carbonate is at least the lower limit of the above range, the rigidity is low and the elasticity is excellent.
  • the content of calcium carbonate is not more than the upper limit of the above range, the production of the stretchable film becomes stable.
  • the surface layer may contain components other than the polypropylene resin (B) and calcium carbonate as long as the effects of the present invention are not impaired.
  • Other components include, for example, the additives mentioned in the elastomer layer.
  • an inorganic filler other than calcium carbonate such as zeolite and silica may be contained.
  • a resin other than the polypropylene resin (B) such as homopolypropylene (H-PP) and polyethylene (PE) may be contained.
  • the thickness of the surface layer is 0.4 to 5.0 ⁇ m, preferably 0.5 to 4.5 ⁇ m, and more preferably 1 to 4.0 ⁇ m.
  • the thickness of the surface layer is at least the lower limit of the above range, the production of the stretchable film becomes more stable.
  • the thickness of the surface layer is not more than the upper limit of the above range, the stretchable film can be thinned, and the surface layer formed of the polypropylene resin (B), which has higher rigidity than the elastomer, is thinned to form a surface.
  • the effect of the rigidity of the layer on the elastic film is reduced. Therefore, the rigidity of the stretchable film is low, and the stretchability is excellent.
  • the thickness of the first surface layer and the thickness of the second surface layer are within the above ranges, respectively.
  • the thickness of the first surface layer and the thickness of the second surface layer may be equal or different.
  • the total thickness of the stretchable film is preferably 20 to 60 ⁇ m, more preferably 25 to 55 ⁇ m, and even more preferably 30 to 50 ⁇ m.
  • the stretchability is excellent.
  • the stretchable film is not more than the upper limit of the above range, the stretchable film can be thinned, the rigidity is lowered, and the stretchability is excellent.
  • the method for producing the stretchable film is not particularly limited, and examples thereof include an inflation method and a cast film process method. Of these, the cast film process method is preferable from the viewpoint of productivity.
  • the use of the elastic film of the present invention is not particularly limited, and can be used for hygiene products, sports products, medical products, and the like.
  • used for clothing such as underwear, waistbands for disposable diapers, side panels, leg gathers, incontinence products, sanitary napkins, bandages, surgical drapes, tightening bands, hats, swimming pants, sports supporters, medical supporters, etc. it can.
  • the elastic film of the present invention has a surface containing a polypropylene-based resin (B) and a specific ratio of calcium carbonate on either or both of the first surface and the second surface of the elastomer layer.
  • a layer is provided, and the thickness of the elastomer layer and the surface layer is controlled within a specific range.
  • L0 is the distance between gripping tools (mm) before extension.
  • L1 is the distance between the gripping tools (mm) after the extension.
  • L2 is the distance between the gripping tools (mm) when the load (N / 25 mm) of the test piece becomes 0 when the test piece is contracted.
  • the stretching direction of the film is MD when an olefin elastomer is used, and TD when a styrene elastomer is used.
  • the rigidity of the stretchable film was evaluated from the stress-strain curve (SS curve) measured in the permanent strain test according to the following criteria.
  • ⁇ (Good) The test force at the time when the elongation at the time of elongation is 50% is 4N or less.
  • ⁇ (defective) The test force at the time when the elongation at the time of elongation is 50% is more than 4N.
  • Elastomer Elastomer
  • A-1 Ethylene-octene elastomer (Infuse9007, manufactured by Dow Chemical Co., Ltd.)
  • Elastomer (A-2) PP-based elastomer (Vistamaxx6102FL, manufactured by Exxon)
  • Elastomer (A-3) SIS elastomer (Quintac3390, styrene content 48% by mass, manufactured by Zeon Corporation)
  • A-4) SIS Elastomer (Quintac3620, styrene content 14% by mass, manufactured by Zeon Corporation)
  • Resin (X-1) Homopolypropylene (H-PP, D101, melting point 163 ° C, manufactured by Noblen)
  • Resin (X-2) Polyethylene (PE, CE3506, melting point 117 ° C, manufactured by Sumikasen)
  • Examples 1 to 8 Comparative Examples 1 to 7
  • Each component forming the surface layer was mixed with a tumbler mixer in the formulations shown in Tables 1 and 2 to obtain a resin mixture.
  • a stretchable film having an elastomer layer and a first surface layer and a second surface layer formed of the resin mixture on both sides of the elastomer layer was produced by a cast film process method.
  • the elastic films of Examples 1 to 8 having a surface layer containing a polypropylene resin (B) and containing calcium carbonate in a specific ratio have low rigidity and excellent heat resistance and elasticity.
  • the film of Comparative Example 1 in which H-PP was used instead of the polypropylene-based resin (B) had high rigidity.
  • the film of Comparative Example 2 in which PE was used instead of the polypropylene resin (B) for the surface layer had insufficient heat resistance.
  • the films of Comparative Example 3 in which the surface layer did not contain calcium carbonate and Comparative Example 4 in which the elastomer layer was too thin had insufficient elasticity.
  • Comparative Example 5 in which the elastomer layer was too thick and Comparative Example 6 in which the surface layer was too thick had high rigidity and insufficient elasticity.
  • Comparative Example 7 in which the content of calcium carbonate in the resin mixture forming the surface layer was too high, the film could not be produced.
  • an elastic film having low rigidity and excellent blocking resistance, heat resistance and elasticity.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
PCT/JP2020/022079 2019-06-06 2020-06-04 伸縮フィルム WO2020246536A1 (ja)

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EP3981593A1 (en) 2022-04-13
JP7554189B2 (ja) 2024-09-19
CN113891798A (zh) 2022-01-04
CN113891798B (zh) 2023-12-05
US11904578B2 (en) 2024-02-20
KR20220018970A (ko) 2022-02-15
EP3981593A4 (en) 2023-07-05
US20220324207A1 (en) 2022-10-13
JPWO2020246536A1 (US07122603-20061017-C00297.png) 2020-12-10

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