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WO2015115449A1 - Adhésif thermofusible - Google Patents

Adhésif thermofusible Download PDF

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Publication number
WO2015115449A1
WO2015115449A1 PCT/JP2015/052267 JP2015052267W WO2015115449A1 WO 2015115449 A1 WO2015115449 A1 WO 2015115449A1 JP 2015052267 W JP2015052267 W JP 2015052267W WO 2015115449 A1 WO2015115449 A1 WO 2015115449A1
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WIPO (PCT)
Prior art keywords
hot melt
melt adhesive
mass
random copolymer
less
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2015/052267
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English (en)
Japanese (ja)
Inventor
小林　賢司
巽　富美男
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Idemitsu Kosan Co Ltd
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Idemitsu Kosan Co Ltd
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Filing date
Publication date
Priority claimed from JP2014018620A external-priority patent/JP2015145471A/ja
Priority claimed from JP2014018623A external-priority patent/JP6346451B2/ja
Application filed by Idemitsu Kosan Co Ltd filed Critical Idemitsu Kosan Co Ltd
Publication of WO2015115449A1 publication Critical patent/WO2015115449A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J109/00—Adhesives based on homopolymers or copolymers of conjugated diene hydrocarbons
    • C09J109/06—Copolymers with styrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/08—Copolymers of styrene
    • C08L25/10—Copolymers of styrene with conjugated dienes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/10—Homopolymers or copolymers of propene
    • C09J123/12—Polypropene

Definitions

  • the present invention relates to a hot melt adhesive containing a propylene homopolymer as an essential component.
  • Hot-melt adhesives are solventless adhesives. After being applied to the adherend by heating and melting, it is solidified by cooling and expresses adhesiveness, allowing instant bonding and high-speed bonding. It is used in a wide range of fields. Adhesive materials to be bonded with hot melt adhesives and their use conditions vary, and various hot melt adhesives have been developed and supplied to the market for various applications. Various operating temperatures are assumed.
  • an ethylene-vinyl acetate copolymer or a thermoplastic elastomer such as a styrene-butadiene-styrene block copolymer or a styrene-isoprene-styrene block copolymer is used as a base polymer.
  • blended tackifier resin and the plasticizer with this is mainly used.
  • hot-melt adhesives manufactured using the base polymer as described above have poor thermal stability during heating, cause oxidation, gelation, decomposition, coloration, etc. during coating, and the strength of the bonded portion is deteriorated over time. There were problems such as causing changes.
  • Propylene polymers have been conventionally used as base polymers for hot melt adhesives.
  • low molecular weight polypropylene polymerized with a metallocene-based catalyst has high fluidity and excellent coating properties when used as a hot-melt adhesive, excellent adhesion strength of low-polar substances such as PP, and heat stability during heating and melting. Since it is excellent in properties, it can be suitably used as a base polymer for various hot melt adhesives (Patent Document 1). It is particularly suitable for spray coating used in the assembly of sanitary materials such as paper diapers and sanitary products.
  • the hot melt adhesive having a polypropylene as a base polymer described in Patent Document 1 exhibits high adhesive strength in bonding of non-woven polypropylene fabrics (hereinafter also referred to as “PP non-woven fabric”), but other materials constituting sanitary materials
  • PP non-woven fabric non-woven polypropylene fabrics
  • PE film polyethylene film
  • the adhesive strength may decrease during the storage process from pasting to use. It is an object of the present invention to provide a hot melt adhesive having high fluidity at the time of melting, exhibiting high adhesive strength between PP nonwoven fabrics, and further having high adhesiveness of PE film-PP nonwoven fabric and long-term stability.
  • a base polymer of a hot melt adhesive As a base polymer of a hot melt adhesive, it is generally said that a resin having high flexibility and excellent elongation is preferable. When the flexibility and elongation of the base polymer are insufficient, the adhesive composition cannot follow the deformation of the adherend and easily causes interfacial peeling, resulting in a decrease in adhesive strength. It is an object of the present invention to provide a hot melt adhesive having high fluidity at the time of melting, exhibiting high adhesive strength between PP nonwoven fabrics, and further having high adhesive strength of PE film-PP nonwoven fabric and excellent elongation. And
  • the present invention relates to the following [1] to [17].
  • [1] (A) a propylene homopolymer satisfying the following (i) to (iii): (B) A hot melt adhesive containing a styrene random copolymer and at least one selected from elastomers having a breaking elongation of 700% or more and a tensile elastic modulus of 10 MPa or less. (I) Tensile modulus at 23 ° C. is 400 MPa or less (ii) Weight average molecular weight (Mw) is 10,000 to 150,000 (Iii) Mw / Mn is 2.5 or less [2] The hot melt adhesive according to [1], wherein (B) is a styrene random copolymer.
  • (B) is a styrene random copolymer
  • the fluidity at the time of melting is high
  • the adhesive strength between PP nonwoven fabrics is high
  • a hot melt adhesive having long-term stability can be provided.
  • the hot melt adhesive of the present invention has improved long-term stability in addition to applicability, adhesiveness of low-polarity substances, and thermal stability during heat-melting, so that it can be used for the production of sanitary materials such as disposable diapers. It can be particularly suitably used as a hot melt adhesive.
  • (B) is an elastomer having a breaking elongation of 700% or more and a tensile modulus of elasticity of 10 MPa or less
  • the fluidity at the time of melting is high, and the PP nonwoven fabric exhibits high adhesive strength.
  • -It is possible to provide a hot melt adhesive having high adhesive strength of PP nonwoven fabric and excellent elongation.
  • the hot melt adhesive of the present invention has improved adhesion to PE film (adhesive strength and elongation) in addition to applicability, adhesion of low-polarity substances, and thermal stability during heating and melting. It can be particularly suitably used as a hot melt adhesive for the production of sanitary materials such as paper diapers.
  • the hot melt adhesive of the present invention comprises (A) a propylene homopolymer satisfying the following (i) to (iii), (B) a styrene random copolymer, a breaking elongation of 700% or more and a tensile modulus of 10 MPa or less. At least one selected from the group of elastomers. (I) Tensile modulus at 23 ° C.
  • the hot melt adhesive of the present invention has high fluidity at the time of melting, exhibits high adhesive strength between PP nonwoven fabrics, and further has high adhesiveness of PE film-PP nonwoven fabric and its long-term stability.
  • This is a combination of a predetermined (A) propylene homopolymer and (B) a styrene random copolymer, which suppresses deterioration of the resin itself, increases compatibility of components, suppresses changes over time, It is considered that long-term stability in strength was obtained.
  • the hot melt adhesive of the present invention according to the second embodiment has high fluidity at the time of melting, exhibits high adhesive strength between PP nonwoven fabrics, and further has high adhesive strength of PE film-PP nonwoven fabric and excellent elongation. .
  • (A) Propylene homopolymer (A) The propylene homopolymer satisfies the following (i) to (iii) in order to increase the fluidity at the time of melting of the hot melt adhesive and to obtain high adhesive strength between the PP nonwoven fabrics.
  • Tensile modulus at 23 ° C. is 400 MPa or less
  • Weight average molecular weight (Mw) is 10,000 to 150,000
  • Mw / Mn is 2.5 or less
  • the measuring method of various numerical values is based on the method described in the examples.
  • the propylene homopolymer has a tensile modulus at 23 ° C. of 400 MPa or less.
  • a lower tensile elastic modulus is preferable from the viewpoint of adhesiveness, and the lower limit thereof is not particularly limited, and the measurement limit value is the lower limit.
  • the tensile elastic modulus is preferably 1 MPa or more, more preferably 5 MPa or more, and further preferably 10 MPa or more.
  • moderate flexibility is required from the viewpoint of the followability of the hot melt adhesive to the adherend and the adhesion to the unevenness of the adherend surface. The From such a viewpoint, the tensile elastic modulus at 23 ° C.
  • the propylene homopolymer of the present invention is 400 MPa or less, preferably 350 MPa or less, more preferably 300 MPa or less, still more preferably 250 MPa or less, and still more preferably 200 MPa or less. More preferably, it is 150 MPa or less.
  • moderate flexibility is required from the viewpoint of bleeding of the hot melt adhesive onto the adherend and the anchor effect on the unevenness of the adherend surface. Is done. From such a viewpoint, the tensile elastic modulus at 23 ° C.
  • the tensile elastic modulus of the propylene homopolymer of the present invention is measured by the method described in the examples.
  • the tensile modulus of the propylene homopolymer of the present invention can be adjusted within a desired range by changing the polymerization conditions (reaction temperature, reaction time, catalyst, promoter) of the propylene homopolymer. .
  • Weight average molecular weight The propylene homopolymer has a weight average molecular weight of 10,000 to 150,000. When the weight average molecular weight is 10,000 to 150,000, the fluidity and adhesion at melting are excellent. From such a viewpoint, the weight average molecular weight is preferably 10,000 to 150,000, more preferably 15,000 to 140,000, and more preferably 15,000 to 130,000. The weight average molecular weight can be controlled by appropriately adjusting the polymerization conditions (propylene pressure, polymerization time, etc.).
  • the propylene homopolymer has a molecular weight distribution (Mw / Mn) of 2.5 or less. If the molecular weight distribution is 2.5 or less, the fluidity at the time of melting is excellent. From such a viewpoint, the molecular weight distribution is preferably 2.4 or less, more preferably 2.2 or less. From the viewpoint of productivity, the molecular weight distribution is preferably 1.1 or more, more preferably 1.3 or more. By using a metallocene catalyst, the molecular weight distribution (Mw / Mn) can be 2.5 or less.
  • the propylene homopolymer has a mesopentad fraction [mmmm] of preferably 20 to 80 mol%.
  • the mesopentad fraction [mmmm] is preferably more than 20 mol% and 80 mol% or less, more preferably more than 40 mol% and 75 mol% or less. It is possible to control the mesopentad fraction by adjusting the monomer concentration and the reaction pressure.
  • the propylene homopolymer has an intrinsic viscosity [ ⁇ ] of preferably 0.01 to 2.0 deciliter / g, more preferably 0.1 to 1.5 deciliter / g, and still more preferably 0, from the viewpoint of applicability. .2 to 1.0 deciliter / g.
  • the intrinsic viscosity [ ⁇ ] is determined by the measurement method described in the examples.
  • the intrinsic viscosity [ ⁇ ] can be controlled by adjusting the polymerization conditions (propylene pressure, polymerization time, etc.).
  • the melting point (Tm-D) of the propylene homopolymer is preferably 0 to 140 ° C., more preferably 20 to 120 ° C., and still more preferably 40 to 100 ° C. from the viewpoint of improving open time and improving creep resistance.
  • a differential scanning calorimeter DSC-7, manufactured by Perkin Elmer
  • 10 mg of a sample is held at ⁇ 10 ° C. for 5 minutes in a nitrogen atmosphere, and then heated at 10 ° C./min.
  • the peak top of the peak observed on the highest temperature side of the melting endotherm curve obtained by the above is defined as the melting point (Tm-D). It is possible to control the melting point by adjusting the monomer concentration and the reaction pressure.
  • Propylene homopolymer production method As a manufacturing method of a propylene homopolymer, the method of manufacturing a propylene homopolymer by homopolymerizing propylene using a metallocene catalyst is mentioned.
  • the metallocene catalyst include JP-A-58-19309, JP-A-61-130314, JP-A-3-163088, JP-A-4-300787, JP-A-4-21694, and special tables.
  • Transition metal compounds having one or two ligands such as a cyclopentadienyl group, a substituted cyclopentadienyl group, an indenyl group, and a substituted indenyl group as described in JP-A-1-503636 Examples thereof include a catalyst obtained by combining a transition metal compound whose ligand is geometrically controlled and a promoter.
  • the ligand comprises a transition metal compound in which a crosslinked structure is formed via a crosslinking group, and in particular, a transition in which a crosslinked structure is formed via two crosslinking groups.
  • a method using a metallocene catalyst obtained by combining a metal compound and a cocatalyst is more preferable. Examples described in paragraphs “0037” to “0084” of JP-A-2001-172325 are also preferable examples in the present invention.
  • the content of the propylene homopolymer is preferably with respect to 100 parts by mass of the hot melt adhesive in order to increase the fluidity at the time of melting of the hot melt adhesive and to obtain high adhesive strength between the PP nonwoven fabrics. Is 1 to 50 parts by mass, more preferably 5 to 40 parts by mass, and still more preferably 8 to 30 parts by mass.
  • the styrenic random copolymer in the present invention is a random copolymer of an aromatic vinyl compound and another monomer, preferably a random copolymer of an aromatic vinyl compound and a conjugated diene.
  • Aromatic vinyl compound means an aromatic hydrocarbon compound having a vinyl group.
  • styrene For example, styrene, ⁇ -methylstyrene, o-methylstyrene, p-methylstyrene, p-tert-butylstyrene, 2, Examples include 4-dimethylstyrene, vinyl naphthalene, and vinyl anthracene. Of these, styrene is preferred. These aromatic vinyl compounds can be used alone or in combination of two or more. “Conjugated diene” means a diolefin compound having at least a pair of conjugated double bonds.
  • conjugated diene examples include 1,3-butadiene, 2-methyl-1,3-butadiene (or isoprene), 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, and 1,3-hexadiene. Is mentioned. Of these, 1,3-butadiene and 2-methyl-1,3-butadiene are preferred. These conjugated diene compounds can be used alone or in combination of two or more.
  • the content of the structural unit derived from the aromatic vinyl compound in the styrene random copolymer is preferably 1 to 40% by mass, more preferably 2 to 30% by mass, and still more preferably 5 to 20% by mass. .
  • the content of the constituent unit derived from the conjugated diene in the (B) styrene random copolymer is preferably 60 to 99% by mass, more preferably 70 to 98% by mass, and still more preferably 80 to 95% by mass.
  • the styrene random copolymer may be either hydrogenated or non-hydrogenated, but in order to obtain excellent long-term stability, the hydrogenated styrene random copolymer may be used. Polymers are preferred.
  • the styrene random copolymer preferably has a breaking elongation of 700% or more and a tensile modulus of 10 MPa or less.
  • the elongation at break of the styrene random copolymer is preferably 700% or more, more preferably 800% or more. When the elongation at break is 700% or more, the adhesive is stretched and the adhesive strength is improved. The elongation at break is preferably 1200% or less, more preferably 1100% or less.
  • the tensile elastic modulus of the styrene random copolymer is preferably 10 MPa or less, more preferably 5 MPa or less, and still more preferably 3 MPa or less.
  • the tensile elastic modulus When the tensile elastic modulus is 10 MPa or less, the adhesive is extended and the adhesive strength is improved.
  • the tensile elastic modulus is preferably 0.1 MPa or more, more preferably 1 MPa or more.
  • the measuring method of breaking elongation and a tensile elasticity modulus are based on the measuring method as described in an Example.
  • the content of the styrenic random copolymer is preferably 1 to 50 parts by mass, more preferably 2 parts per 100 parts by mass of the hot melt adhesive in order to obtain excellent adhesiveness and long-term stability. -30 parts by mass, more preferably 3-25 parts by mass.
  • (B) Elastomers have a breaking elongation of 700% or more and a tensile modulus of 10 MPa or less in order to obtain excellent adhesive strength and elongation.
  • (B) Elongation at break of elastomers is 700% or more, more preferably 800% or more. When the elongation at break is 700% or more, the adhesive is stretched and the adhesive strength is improved. The elongation at break is preferably 1200% or less, more preferably 1100% or less.
  • the tensile modulus of the elastomer is 10 MPa or less, more preferably 5 MPa or less, and still more preferably 3 MPa or less.
  • the tensile elastic modulus When the tensile elastic modulus is 10 MPa or less, the adhesive is extended and the adhesive strength is improved.
  • the tensile elastic modulus is preferably 0.1 MPa or more, more preferably 1 MPa or more.
  • the measuring method of breaking elongation and a tensile elasticity modulus are based on the measuring method as described in an Example.
  • the elastomers are preferably not block copolymers, and more preferably (Ba) random copolymers in order to obtain long-term storage stability.
  • elastomers examples include styrene copolymers, butadiene acrylonitrile elastomers, natural rubber, polybutadiene rubber, polyisoprene rubber, butyl rubber, polyester rubber, acrylic rubber, silicon rubber, amorphous or low crystalline ethylene. And olefin elastomers such as propylene elastomer and propylene elastomer. Among these, (Bb) styrene-based copolymer is preferable. Moreover, you may use these individually or in combination of 2 or more types.
  • Examples of (Bb) styrene-based copolymers include styrene-based random copolymers and styrene-based block copolymers. In order to obtain long-term storage stability, styrene-based random copolymers are preferred.
  • the styrene-based copolymer is a copolymer of an aromatic vinyl compound and another monomer, and is preferably a copolymer of an aromatic vinyl compound and a conjugated diene.
  • “Aromatic vinyl compound” means an aromatic hydrocarbon compound having a vinyl group.
  • These aromatic vinyl compounds can be used alone or in combination of two or more.
  • Conjugated diene means a diolefin compound having at least a pair of conjugated double bonds.
  • the conjugated diene include 1,3-butadiene, 2-methyl-1,3-butadiene (or isoprene), 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, and 1,3-hexadiene. Is mentioned. Of these, 1,3-butadiene and 2-methyl-1,3-butadiene are preferred.
  • These conjugated diene compounds can be used alone or in combination of two or more.
  • the content of the structural unit derived from the aromatic vinyl compound in the (Bb) styrene copolymer is preferably 1 to 40% by mass, more preferably 2 to 30% by mass, and still more preferably 5 to 20% by mass.
  • the content of the structural unit derived from the conjugated diene in the (Bb) styrene copolymer is preferably 60 to 99% by mass, more preferably 70 to 98% by mass, and still more preferably 80 to 95% by mass.
  • the styrene copolymer may be hydrogenated or non-hydrogenated, but in order to obtain excellent adhesive strength and elongation, (Bc) hydrogenated styrene Type copolymer is preferred, and (Bd) hydrogenated styrene type random copolymer is more preferred.
  • the content of the elastomer (B) is preferably 1 to 50 parts by mass, more preferably 2 to 30 parts by mass, and still more preferably 100 parts by mass with respect to 100 parts by mass of the hot melt adhesive in order to obtain excellent adhesive strength and elongation. Is 3 to 25 parts by mass.
  • the hot melt adhesive of the present invention may contain a tackifying resin.
  • the tackifying resin include a solid, semi-solid or liquid resin at room temperature composed of a hydrogenated derivative of an aliphatic hydrocarbon petroleum resin, a rosin derivative resin, a polyterpene resin, a petroleum resin, an oil-soluble phenol resin, or the like. be able to. You may use these individually or in combination of 2 or more types.
  • the content of the tackifying resin is preferably 20 to 60 parts by mass with respect to 100 parts by mass of the hot-melt adhesive, from the viewpoints of improvement in tackiness, applicability, and wettability to the adherend due to a decrease in viscosity. More preferably, it is 30 to 60 parts by mass.
  • the hot melt adhesive of the present invention may contain oil.
  • the oil include paraffinic process oil and naphthenic process oil.
  • the content of the oil is preferably 5 to 40 parts by mass, more preferably 100 parts by mass with respect to 100 parts by mass of the hot melt adhesive, from the viewpoints of improvement in tackiness, applicability, and improvement in wettability to the adherend due to a decrease in viscosity. Is 10 to 30 parts by mass.
  • the hot melt adhesive of the present invention may contain a wax.
  • the wax include animal wax, plant wax, carnauba wax, candelilla wax, wood wax, beeswax, mineral wax, petroleum wax, paraffin wax, microcrystalline wax, petrolatum, higher fatty acid wax, higher fatty acid ester wax, Fischer Examples include Tropsch wax.
  • the content of the wax is preferably 5 to 40 parts by mass, more preferably 10 to 30 parts with respect to 100 parts by mass of the hot melt adhesive, from the viewpoints of coating properties and improvement of wettability to the adherend due to a decrease in viscosity. Part by mass.
  • the hot melt adhesive of the present invention may contain, for example, a plasticizer, an inorganic filler, an antioxidant and the like.
  • a plasticizer include phthalic acid esters, adipic acid esters, fatty acid esters, glycols, and epoxy polymer plasticizers.
  • the inorganic filler include clay, talc, calcium carbonate, barium carbonate and the like.
  • antioxidants examples include trisnoniphenyl phosphite, distearyl pentaerythritol diphosphite, ADK STAB 1178 (manufactured by ADEKA Corporation), Stamilizer TNP (manufactured by Sumitomo Chemical Co., Ltd.), Irgaphos 168 (manufactured by BASF Corporation), Phosphoric antioxidants such as Sandstab P-EPQ (Sand Corp.), 2,6-di-t-butyl-4-methylphenol, n-octadecyl-3- (3 ′, 5′-di-t-butyl) -4′-hydroxyphenyl) propionate, Sumilizer BHT (manufactured by Sumitomo Chemical Co., Ltd.), Irganox 1010 (manufactured by BASF), phenolic antioxidants, dilauryl-3,3′-thiodipropionate, pentaerythritol t
  • the hot melt adhesive of the present invention is preferably at least one selected from (A) a propylene homopolymer, (B) a styrene random copolymer and elastomers as a base polymer, preferably (C) a tackifier resin, (D ) Oil, (E) Wax, and various additives as necessary, dry blended using a Henschel mixer, etc., and then melt-kneaded with a single or twin screw extruder, plast mill, Banbury mixer, etc. be able to.
  • the hot melt adhesive of the present invention has a melt viscosity at 160 ° C. of preferably 12000 mPa ⁇ s or less, more preferably 2000 to 11000 mPa ⁇ s, and further preferably 4000 to 10000 mPa ⁇ s.
  • the melt viscosity is measured by the method described in the examples.
  • the hot melt adhesive of the present invention is excellent in adhesiveness with various substrates including low polar substances such as polyolefins, and is excellent in thermal stability during heating and melting. It can be suitably used for bookbinding, textiles, woodworking, electrical materials, canning, construction and bag making. Particularly, it is suitably used for adhesion of polyolefin-based materials. For example, it is used for adhesion between polyolefin nonwoven fabric and polyolefin nonwoven fabric, or adhesion between polyolefin film and polyolefin nonwoven fabric, preferably adhesion between PP nonwoven fabric and PP nonwoven fabric. Or used for adhesion between PE film and PP nonwoven fabric.
  • the method for applying the hot melt adhesive of the present invention is not particularly limited, and for example, any method of contact application or non-contact application may be used.
  • Contact coating refers to a coating method in which an ejector is brought into contact with a member or a film when applying a hot melt adhesive.
  • Non-contact coating refers to an ejector applied to a member or a film when applying a hot melt adhesive.
  • the coating method which does not contact. Examples of the contact coating method include slot coater coating and roll coater coating.
  • Non-contact coating methods include, for example, spiral coating to be applied in a spiral manner, omega coating to be applied in a wave shape, control seam coating, slot spray coating to be applied in a planar manner, curtain spray coating, and dot coating. Dot coating etc. to work are mentioned. Among these, spiral coating is preferable for the hot melt adhesive of the present invention.
  • Spiral coating is a method in which an adhesive is spirally contactlessly applied with air by intermittent or continuous coating.
  • ⁇ Tensile modulus> The sample was press-molded to prepare a test piece, and the tensile modulus (MPa) of the sample was measured under the following conditions in accordance with JIS K7113. -Test piece (No. 2 dumbbell) Thickness: 1mm ⁇ Crosshead speed: 100mm / min ⁇ Load cell: 100N ⁇ Measurement temperature: 23 °C
  • Weight average molecular weight (Mw), molecular weight distribution (Mw / Mn) measurement The weight average molecular weight (Mw) and molecular weight distribution (Mw / Mn) of the sample were determined by gel permeation chromatography (GPC). For the measurement, the following apparatus and conditions were used, and a weight average molecular weight in terms of polystyrene was obtained. The results are shown in Table 1.
  • ⁇ GPC measurement device Column: TOSO GMHHR-H (S) HT Detector: RI detector for liquid chromatogram WATERS 150C ⁇ Measurement conditions> Solvent: 1,2,4-trichlorobenzene Measurement temperature: 145 ° C Flow rate: 1.0 ml / min Sample concentration: 2.2 mg / ml Injection volume: 160 ⁇ l Calibration curve: Universal Calibration Analysis program: HT-GPC (Ver.1.0)
  • Tm-D Melting point
  • the coating conditions of the spiral spray gun were a hot melt adhesive melting temperature of 150 ° C., a spray gun temperature of 150 ° C., and a hot air temperature of 180 ° C.
  • the amount of hot melt adhesive applied was 4 g / m 2, and the hot air pressure was adjusted so that the width of the coated spiral was about 15 mm.
  • the pressure for pressure bonding with a press roller after coating was 0.1 MPa, and the open time was about 0.1 seconds.
  • the laminate bonded with the hot-melt adhesive was cut at a width of 25 mm in the direction perpendicular to the traveling direction of the substrate (CD direction), and used as a test piece for measuring the T-shaped peel adhesive strength.
  • the PE film-PP non-woven fabric adhesive strength test results are indicated as “PE / NW” in the table, and the PP non-woven fabric-PP non-woven fabric adhesive strength test results are indicated as “NW / NW” in the table.
  • the test piece was cured at 23 ° C. and 50% RH for 24 hours or more, and then subjected to a T-shaped peel test in the same environment. In order to evaluate the change in peel adhesive strength over time, test pieces cured at 23 ° C. and 50% RH for 24 hours or more are held at 50 ° C. for 2 weeks and 4 weeks, and further cured at 23 ° C. and 50% RH for 24 hours. After that, the peel adhesive strength was measured in the same manner.
  • T-peeling test In the T-type peel test, an autograph AGS-X manufactured by Shimadzu Corporation was used, a peel test was performed at a peel speed of 100 mm / min, and a peel length of 30 mm, and an average value of two maximum values was calculated. Five test pieces were measured for each hot melt adhesive, and the average value of the top three was taken as the peel adhesive strength.
  • the hot melt adhesive of the present invention has high fluidity when melted, exhibits high adhesive strength between PP nonwoven fabrics, and further has high adhesiveness and long-term stability of PE film-PP nonwoven fabric.
  • the hot melt adhesive of the present invention has high fluidity when melted, exhibits high adhesive strength between PP nonwoven fabrics, and further has high adhesive strength and excellent elongation of PE film-PP nonwoven fabric. For this reason, it can be suitably used as a hot-melt adhesive for sanitary materials, packaging, bookbinding, textiles, woodworking, electrical materials, canning, building and bag making.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
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Abstract

　L'invention porte sur un adhésif thermofusible qui présente une grande fluidité quand il est à l'état fondu, une force d'adhérence élevée entre des non-tissés en PP et une adhésivité supérieure avec un film de PE/non-tissé en PP, ainsi qu'une stabilité à long terme. L'adhésif thermofusible selon l'invention comprend au moins un type de composant choisi entre (A) un homopolymère du propylène qui satisfait aux conditions (i) à (iii) ci-dessous et (B) un copolymère aléatoire du styrène et un élastomère ayant un allongement à la rupture supérieur ou égal à 700 % et un module d'élasticité en traction inférieur ou égal à 10 MPa. (i) Le module d'élasticité en traction à 23 °C est inférieur ou égal à 400 MPa, (ii) la masse moléculaire moyenne en poids (Mw) est de 10 000 à 150 000 et (iii) le rapport Mw/Mn est inférieur ou égal à 2,5.
PCT/JP2015/052267 2014-02-03 2015-01-28 Adhésif thermofusible Ceased WO2015115449A1 (fr)

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JP2014018620A JP2015145471A (ja) 2014-02-03 2014-02-03 ホットメルト接着剤
JP2014018623A JP6346451B2 (ja) 2014-02-03 2014-02-03 ホットメルト接着剤
JP2014-018620 2014-02-03
JP2014-018623 2014-02-03

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US20170145198A1 (en) * 2014-07-03 2017-05-25 Idemitsu Kosan Co., Ltd. Spunbonded non-woven fabric and method for manufacturing same
JP2019011422A (ja) * 2017-06-30 2019-01-24 ヘンケルジャパン株式会社 ホットメルト接着剤
WO2020085299A1 (fr) * 2018-10-22 2020-04-30 出光興産株式会社 Adhésif thermofusible
JP2022065181A (ja) * 2017-06-30 2022-04-26 ヘンケルジャパン株式会社 ホットメルト接着剤
CN116218435A (zh) * 2023-03-09 2023-06-06 佛山市本嘉新材料科技有限公司 一种卫生用品端封胶及其制备方法、刮涂方法

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WO2003091289A1 (fr) * 2002-04-23 2003-11-06 Idemitsu Kosan Co., Ltd. Polypropylene a grande aptitude a l'ecoulement et procede de fabrication
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170145198A1 (en) * 2014-07-03 2017-05-25 Idemitsu Kosan Co., Ltd. Spunbonded non-woven fabric and method for manufacturing same
US10844205B2 (en) * 2014-07-03 2020-11-24 Idemitsu Kosan Co., Ltd. Spunbonded non-woven fabric and method for manufacturing same
JP2019011422A (ja) * 2017-06-30 2019-01-24 ヘンケルジャパン株式会社 ホットメルト接着剤
JP7032878B2 (ja) 2017-06-30 2022-03-09 ヘンケルジャパン株式会社 ホットメルト接着剤
JP2022065181A (ja) * 2017-06-30 2022-04-26 ヘンケルジャパン株式会社 ホットメルト接着剤
JP7289952B2 (ja) 2017-06-30 2023-06-12 ヘンケルジャパン株式会社 ホットメルト接着剤
WO2020085299A1 (fr) * 2018-10-22 2020-04-30 出光興産株式会社 Adhésif thermofusible
CN116218435A (zh) * 2023-03-09 2023-06-06 佛山市本嘉新材料科技有限公司 一种卫生用品端封胶及其制备方法、刮涂方法

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