JP2020040372A - Molding - Google Patents

Abstract

An object of the present invention is to provide a molded article in which a hot-melt adhesive is combined with a specific adherend to improve the adhesive strength.
Using a differential scanning calorimeter (DSC), hold at −10 ° C. for 5 minutes in a nitrogen atmosphere, and then raise the temperature at 10 ° C./min. Propylene resin containing a propylene homopolymer (A) having a melting endotherm (ΔH-D) of 0 J / g to 80 J / g obtained from a melting endotherm curve measured under the conditions of 80% by mass to 100% by mass. A molded article obtained by applying the composition (S) to the surface of an adherend, wherein the arithmetic mean roughness (Sa) of the surface of the adherend is 40 μm or more.
[Selection diagram] None

Description

  The present invention relates to a molded article, and more particularly to a molded article obtained by applying a propylene-based resin composition to the surface of an adherend.

  The hot melt adhesive is a solvent-free adhesive, and is applied to an adherend by heating and melting, and then solidifies by cooling to exhibit adhesiveness. BACKGROUND ART In recent years, hot melt adhesives have been widely used in various fields because they are excellent in high-speed coating properties, fast-curing properties, solventless properties, barrier properties, energy saving properties, economic efficiency, and the like.

  As a base polymer of the hot melt adhesive, a propylene-based polymer is widely used from the viewpoint of thermal stability. Above all, propylene homopolymers polymerized with metallocene catalysts have high fluidity, excellent coatability when used as a hot melt adhesive, excellent adhesive strength for low polar substances such as polypropylene, and heat during melting. Because of its excellent stability, it can be suitably used as a base polymer for various hot melt adhesives (Patent Documents 1 and 2).

International Publication No. WO 2014/192767 JP 2013-064056 A

  It is required that a hot melt adhesive containing, as a base polymer, a propylene homopolymer polymerized by a metallocene catalyst has an improved adhesive strength.

  Therefore, the problem to be solved by the present invention is to provide a molded article in which a hot-melt adhesive is combined with a specific adherend to improve the adhesive strength.

That is, the present disclosure relates to the following.
<1> Using a differential scanning calorimeter (DSC), hold at −10 ° C. for 5 minutes in a nitrogen atmosphere, and then raise the temperature at 10 ° C./min. A propylene-based resin composition containing a propylene homopolymer (A) having a melting endotherm (ΔH-D) of 0 to 80 J / g obtained from a melting endotherm curve measured in the step of 80% to 100% by mass. A molded article obtained by applying an object (S) to the surface of an adherend, wherein the arithmetic average roughness (Sa) of the surface of the adherend is 40 μm or more.
<2> The molded article according to <1>, wherein the polypropylene homopolymer (A) has a melt viscosity at 190 ° C of from 1,000 mPa · s to 500,000 mPa · s.
<3> The molded article according to <1> or <2>, wherein the solidification time of the propylene-based resin composition (S) measured with a rheometer is 200 sec or more and 1,500 sec or less.
<4> The molded article according to any one of <1> to <3>, wherein the adherend is in a sheet shape.
<5> The molded article according to <4>, wherein the thickness of the adherend is 1 mm or more and 50 mm or less.
<6> The molded article according to any one of <1> to <5>, wherein the adherend is a cloth, wood, or a foam molded article.
<7> The molded article according to any one of <1> to <6>, wherein the molded article is a textile laminate.

  The molded article disclosed in the present application can use a specific propylene-based resin composition as a hot-melt adhesive and combine the hot-melt adhesive with a specific adherend to greatly improve the adhesive strength.

It is explanatory drawing which shows the measuring method of the adhesive force in an Example. It is explanatory drawing which shows the measuring method of the adhesive force in an Example.

  Hereinafter, the present invention will be described in detail. In this specification, the term “A to B” regarding the description of numerical values means “A or more and B or less” (when A <B) or “A or less B or more” (when A> B). . In the present invention, a combination of preferred embodiments is a more preferred embodiment.

  The molded article of the present invention is obtained by applying a propylene-based resin composition (S) containing 80% by mass or more and 100% by mass or less of a propylene homopolymer (A) to the surface of an adherend. The arithmetic average roughness (Sa) of the surface of the adherend used in the present invention is 40 μm or more.

  The molded article of the present invention uses a specific propylene-based resin composition as a hot-melt adhesive, and combines the hot-melt adhesive with a specific adherend to form a propylene-based resin applied to the surface of the adherend. A sufficient anchor effect is exerted between the resin composition (S) and the adherend, and the adhesive strength can be greatly improved. The molded article of the present invention is preferably a textile laminate.

[Propylene resin composition (S)]
The propylene-based resin composition (S) contains 80% of the propylene homopolymer (A) based on 100% by mass of the propylene-based resin composition (S) from the viewpoint of improving the fluidity and adhesive strength of the hot melt adhesive. % By mass, preferably 85% by mass or more, more preferably 90% by mass or more, still more preferably 95% by mass or more, and 100% by mass or less. The upper limit of the content of the propylene homopolymer (A) in the propylene-based resin composition (S) may be 99% by mass or less, or 98% by mass or less.

<Propylene homopolymer (A)>
(Melting endotherm (ΔH-D))
The melting endotherm (ΔH-D) of the propylene homopolymer (A) is 0 J / g or more and 80 J / g or less, preferably 5 J / g or more, from the viewpoint of improvement in solidification rate, flexibility and elongation at break. It is more preferably at least 10 J / g, further preferably at most 20 J / g, and preferably at most 70 J / g, more preferably at most 60 J / g, even more preferably at most 50 J / g.
The melting endotherm (ΔH-D) can be controlled by appropriately adjusting the monomer concentration and the reaction pressure. The above-mentioned melting endotherm (ΔH-D) is obtained by using a line connecting a low-temperature side point where there is no change in calorie and a high-temperature side point where there is no change in calorie as a base line, as a melting endotherm curve obtained by DSC measurement. It is calculated by obtaining an area surrounded by a line portion including a peak observed on the highest temperature side and the base line.

(Melt viscosity (B-type viscosity))
The melt viscosity (B-type viscosity) of the propylene homopolymer (A) measured at 190 ° C. with a B-type viscometer is preferably 1,000 mPa · s or more and 500,000 mPa from the viewpoint of improving fluidity and low-temperature coatability. -It is s or less. When the melt viscosity of the propylene homopolymer (A) is within the range, the fluidity and low-temperature applicability of the propylene-based resin composition (S) containing the propylene homopolymer (A) can be improved. The melt viscosity is more preferably 2,000 mPas or more, still more preferably 3,000 mPas or more, even more preferably 5,000 mPas or more, and more preferably 400,000 mPas or less, More preferably, it is 100,000 mPa · s or less, still more preferably 85,000 mPa · s or less, particularly preferably 10,000 mPa · s or less. The melt viscosity is specifically measured by the method described in Examples.

The melting point (Tm-D) of the propylene homopolymer (A) is preferably 120 ° C. from the viewpoint of low-temperature coatability which can contribute to reduction of damage to an adherend and energy cost and suppression of deterioration of an adhesive. The temperature is preferably 100 ° C. or lower, more preferably 90 ° C. or lower, and still more preferably 85 ° C. or lower. Further, the melting point is preferably 0 ° C. or higher, more preferably 40 ° C. or higher for easy handling.
In the present invention, using a differential scanning calorimeter (“DSC-7” manufactured by Perkin-Elmer Co., Ltd.), 10 mg of a sample was kept at −10 ° C. for 5 minutes in a nitrogen atmosphere, and then heated at a rate of 10 ° C./min. The peak top of the peak observed on the highest temperature side of the melting endothermic curve obtained by this is defined as the melting point (Tm-D). The melting point can be controlled by appropriately adjusting the monomer concentration and the reaction pressure.

(Weight average molecular weight (Mw))
The weight average molecular weight (Mw) of the propylene homopolymer (A) is preferably 10,000 or more, more preferably 20,000 or more, and still more preferably 30,000 or more, from the viewpoint of mechanical strength. It is preferably at most 500,000, more preferably at most 200,000, further preferably at most 100,000, even more preferably at most 50,000. In the present invention, the weight average molecular weight (Mw) is a weight average molecular weight in terms of polystyrene measured by a gel permeation chromatography (GPC) method.

(Molecular weight distribution (Mw / Mn))
The molecular weight distribution (Mw / Mn) of the propylene homopolymer (A) is preferably less than 3.0, more preferably 2.5 or less, still more preferably 2.2 or less, from the viewpoint of mechanical strength. And preferably 1.2 or more, more preferably 1.5 or more. In the present invention, the molecular weight distribution (Mw / Mn) is a value calculated from the weight average molecular weight Mw and the number average molecular weight Mn in terms of polystyrene measured by gel permeation chromatography (GPC).

(Production method of propylene homopolymer (A))
The propylene homopolymer (A) can be produced, for example, using a metallocene-based catalyst as described in WO2003 / 087172. In particular, it is preferable to use a transition metal compound in which a ligand forms a cross-linked structure through a cross-linking group, and particularly, a transition metal compound in which a ligand forms a cross-linked structure through two cross-linking groups. Metallocene-based catalysts obtained by combining a promoter are preferred.

To give a concrete example,
(I) General formula (I)

[Wherein, M represents a metal element belonging to Groups 3 to 10 of the periodic table or a lanthanoid series, and E ¹ and E ² represent a substituted cyclopentadienyl group, an indenyl group, a substituted indenyl group, a heterocyclopentadienyl group, respectively. A ligand selected from a substituted heterocyclopentadienyl group, an amide group, a phosphide group, a hydrocarbon group and a silicon-containing group, forming a crosslinked structure via A ¹ and A ² And they may be the same or different from each other, X represents a σ-binding ligand, and when there are a plurality of Xs, a plurality of Xs may be the same or different, and other X, E ¹ , E ² or Y and may be crosslinked. Y represents a Lewis base, if Y is plural, the plurality of Y may be the same or different, other Y, it may be crosslinked E ^1, E ² or X, A ¹ and A ² A divalent cross-linking group for bonding two ligands, wherein the divalent cross-linking group is a hydrocarbon group having 1 to 20 carbon atoms, a hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing group, a germanium-containing group, and a tin-containing group. , -O -, - CO -, - S -, - SO 2 -, - Se -, - NR 1 -, - PR 1 -, - P (O) R 1 -, - BR 1 - or -AlR ¹ - R ¹ represents a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms or a halogen-containing hydrocarbon group having 1 to 20 carbon atoms, which may be the same or different. q represents an integer of 1 to 5 and represents ((valence of M) -2), and r represents an integer of 0 to 3. ]
(Ii) (ii-1) a compound capable of forming an ionic complex by reacting with the transition metal compound of the component (i) or a derivative thereof; and (ii-2) aluminoxane And a polymerization catalyst containing at least one component selected from the group consisting of:

  As the transition metal compound of the component (i), a transition metal compound having a ligand of (1,2 ′) (2,1 ′) double cross-linking type is preferable. For example, (1,2′-dimethylsilylene) ( 2,1′-dimethylsilylene) -bis (3-trimethylsilylmethylindenyl) zirconium dichloride.

  Specific examples of the compound of the above component (ii-1) include triethylammonium tetraphenylborate, tri-n-butylammonium tetraphenylborate, trimethylammonium tetraphenylborate, tetraethylammonium tetraphenylborate, methyltetraphenylborate (tri-methylborate). n-butyl) ammonium, benzyltetraphenylborate (tri-n-butyl) ammonium, dimethyldiphenylammonium tetraphenylborate, triphenyl (methyl) ammonium tetraphenylborate, trimethylanilinium tetraphenylborate, methylpyridinium tetraphenylborate, tetra Benzylpyridinium phenylborate, methyl tetraphenylborate (2-cyanopyridinium), triethyltetrakis (pentafluorophenyl) borate Monium, tri-n-butylammonium tetrakis (pentafluorophenyl) borate, triphenylammonium tetrakis (pentafluorophenyl) borate, tetra-n-butylammonium tetrakis (pentafluorophenyl) borate, tetraethylammonium tetrakis (pentafluorophenyl) borate Benzyl (tri-n-butyl) ammonium tetrakis (pentafluorophenyl) borate, methyldiphenylammonium tetrakis (pentafluorophenyl) borate, triphenyl (methyl) ammonium tetrakis (pentafluorophenyl) borate, tetrakis (pentafluorophenyl) borate Methylanilinium, dimethylanilinium tetrakis (pentafluorophenyl) borate, tetrakis (pentafluorophenyl) B) trimethylanilinium borate, methylpyridinium tetrakis (pentafluorophenyl) borate, benzylpyridinium tetrakis (pentafluorophenyl) borate, methyl (2-cyanopyridinium) tetrakis (pentafluorophenyl) borate, benzyl tetrakis (pentafluorophenyl) borate (2-cyanopyridinium), methyl tetrakis (pentafluorophenyl) borate (4-cyanopyridinium), triphenylphosphonium tetrakis (pentafluorophenyl) borate, dimethylanily tetrakis [bis (3,5-ditrifluoromethyl) phenyl] borate , Ferrocenium tetraphenylborate, silver tetraphenylborate, trityl tetraphenylborate, tetraphenylporphyrin manganese tetraphenylborate, Ferrocenium trakis (pentafluorophenyl) borate, tetrakis (pentafluorophenyl) borate (1,1′-dimethylferrocenium), decamethylferrocenium tetrakis (pentafluorophenyl) borate, silver tetrakis (pentafluorophenyl) borate, Trityl tetrakis (pentafluorophenyl) borate, lithium tetrakis (pentafluorophenyl) borate, sodium tetrakis (pentafluorophenyl) borate, manganese tetraphenyl (pentafluorophenyl) borate, tetraphenylporphyrin manganese, silver tetrafluoroborate, silver hexafluorophosphate, hexa Examples thereof include silver fluoroarsenate, silver perchlorate, silver trifluoroacetate, and silver trifluoromethanesulfonate.

  Examples of the aluminoxane as the component (ii-2) include known chain aluminoxanes and cyclic aluminoxanes.

  Also, trimethylaluminum, triethylaluminum, triisopropylaluminum, triisobutylaluminum, dimethylaluminum chloride, diethylaluminum chloride, methylaluminum dichloride, ethylaluminum dichloride, dimethylaluminum fluoride, diisobutylaluminum hydride, diethylaluminum hydride, ethylaluminum sesquichloride, etc. The olefin-based polymer (A) may be produced by using the organoaluminum compound of the above.

  The propylene homopolymer (A) can be suitably applied to a hot melt adhesive. Generally, a hot melt adhesive contains a tackifier and a plasticizer in addition to a base polymer. The propylene homopolymer (A) can be used as part or all of the base polymer. Further, the propylene homopolymer (A) can be used as an adhesive showing sufficient adhesiveness as a simple substance even if it does not contain a plasticizer and a tackifier depending on the type of the adherend.

<Other resins>
The propylene-based thermoplastic resin composition (S) may be a resin other than the propylene homopolymer (A) as a resin other than the propylene homopolymer (A) from the viewpoint of the adhesive strength of the hot melt adhesive, such as a styrene-based block copolymer, an ethylene-vinyl acetate copolymer, and ethylene. It can contain at least one selected from the group consisting of a system olefin polymer, an amorphous polyolefin and a propylene elastomer.

(Styrene block copolymer)
In the present invention, the “styrene-based block copolymer” is a copolymer obtained by block-copolymerizing a styrene-based compound and a conjugated diene compound, and usually has a styrene-based compound block and a conjugated diene compound block. There is no particular limitation as long as a hot melt adhesive can be obtained.

  Here, examples of the “styrene compound” include styrene, o-methylstyrene, p-methylstyrene, p-tert-butylstyrene, 1,3-dimethylstyrene, α-methylstyrene, vinylnaphthalene and vinylanthracene. it can. Particularly, styrene is preferred. These styrene compounds can be used alone or in combination.

  “Conjugated diene compound” means a diolefin compound having at least one pair of conjugated double bonds. As the “conjugated diene compound”, specifically, for example, 1,3-butadiene, 2-methyl-1,3-butadiene (or isoprene), 2,3-dimethyl-1,3-butadiene, 1,3- Examples thereof include pentadiene and 1,3-hexadiene. 1,3-butadiene and 2-methyl-1,3-butadiene are particularly preferred. These conjugated diene compounds can be used alone or in combination.

  The styrene-based block copolymer may be an unhydrogenated product or a hydrogenated product. As the “non-hydrogenated styrene-based block copolymer”, specifically, a non-hydrogenated block based on a conjugated diene compound can be exemplified. The “hydrogenated styrene-based block copolymer” is specifically exemplified by a block copolymer obtained by partially or entirely hydrogenating a block based on a conjugated diene compound.

  The ratio of “hydrogenated styrene-based block copolymer” can be represented by “hydrogenation rate”. The "hydrogenation rate" of the "hydrogenated styrene-based block copolymer" refers to the total aliphatic double bonds contained in the block based on the conjugated diene compound. The ratio of double bonds converted to hydrogen bonds. This “hydrogenation rate” can be measured by an infrared spectrophotometer, a nuclear magnetic resonance apparatus, or the like.

Specific examples of the “non-hydrogenated styrene-based block copolymer” include, for example, a styrene-isoprene block copolymer (also referred to as “SIS”) and a styrene-butadiene block copolymer (also referred to as “SBS”). As the “hydrogenated styrene-based block copolymer”, specifically, for example, a hydrogenated styrene-isoprene block copolymer (also referred to as “SEPS”) and a hydrogenated styrene-butadiene block copolymer (“SEBS”) Also called).
The styrene-based block copolymers can be used alone or in combination.

As the styrene-based block copolymer, commercially available products can be used, and each can be used alone or in combination.
For example, "Asaprene T-439", "Asaprene T-436", "Asaprene T-438", "Asaprene N505", "Tuftec H1121", "Tuftec H1062", "Tuftec H1052X" and "Asaprene T-439" manufactured by Asahi Kasei Corporation. "Tuffrene T125";"TR2003","TR2500" and "TR2600" manufactured by JSR Corporation; "Steron 857" and "Steron 841A" manufactured by Firestone; "Clayton D1118", "Creton Polymer""ClaytonG1654","ClaytonG1726";"SolT166" manufactured by Enichem; "Quintac 3433N" and "Quintac 3421" manufactured by Zeon Corporation; "Septon 2002" manufactured by Kuraray Co., Ltd. And "Septon 2063" Cut (all are trade names).

  From the viewpoint of the adhesive strength of the hot melt adhesive, the styrene-based block copolymer has a styrene block ratio (styrene content) of preferably 5 to 50% by mass, more preferably 10 to 50% by mass. ４０40% by mass.

(Ethylene vinyl acetate copolymer)
The ethylene vinyl acetate copolymer (EVA) that can be used in the present invention has a vinyl acetate (VA) content of preferably 5 to 50% by mass, more preferably 10 to 40% by mass. These ethylene-vinyl acetate copolymer resins (EVA) may be used alone or in combination of two or more.

Commercially available ethylene vinyl acetate copolymer resins include "Ultracene 684" manufactured by Tosoh Corporation (VA content: 20% by mass, MFR = 2000, Ring and ball method softening temperature: 80 ° C), and "Ultracene 722" (VA 28% by mass, MFR = 400, Ring-and-ball method softening temperature 82 ° C.), “Ultracene 735” (VA content 28% by mass, MFR = 1000, Ring-and-ball method softening temperature 85 ° C.), etc. (all are commercial products) Name).
The MFR (melt flow rate) refers to a value measured under the conditions of 190 ° C. and a load of 21.18 N according to JIS K7210, and the ring and ball method softening temperature is measured according to JIS K2207. A thing.

(Ethylene olefin polymer)
Specific examples of the ethylene-based olefin polymer include polyethylene and a copolymer of ethylene and an olefin having 3 to 10 carbon atoms. There is no particular limitation as long as it can be used as a base polymer of the hot melt adhesive, but from the viewpoint of the adhesiveness of the hot melt adhesive, an ethylene-α-olefin copolymer is preferred. Specific examples of the α-olefin include propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, and 1-hexadecene. , 1-octadecene, 1-eicosene and the like, and one or more of these can be used. Among these α-olefins, 1-octene is preferred. From the viewpoint of the adhesiveness of the hot melt adhesive, an ethylene-1-octene copolymer is more preferable, and an ethylene-1-octene copolymer containing 5 to 50% by mass of a structural unit derived from 1-octene is more preferable. It is united.

  The melting point of the ethylene-based olefin polymer is preferably from 60 to 120 ° C, more preferably from 60 to 90 ° C, from the viewpoint of heat creep resistance. The melting point of the ethylene-based olefin polymer can be measured by differential scanning calorimetry. The amorphous olefin polymer belongs to the amorphous polyolefin described below.

  Commercially available ethylene-based olefin polymers include “Engage”, “Affinity”, and “Infuse” manufactured by Dow Chemical Co., Ltd .; and “Exact” manufactured by ExxonMobil. ) ";" TAFMER H "," TAFMER A "," TAFMER A "," TAFMER P ", manufactured by Mitsui Chemicals, Inc .;" LUCENE ", manufactured by LG Chemical Co., Ltd .; Co., Ltd. ("Karnel") (all are trade names).

(Amorphous polyolefin)
The amorphous olefin polymer is one or more homopolymers or copolymers selected from the group consisting of linear or branched α-olefins or dienes having 2 to 24 carbon atoms, and is not particularly limited. , Polybutene, polybutadiene, polyisoprene, and amorphous polyalphaolefin.

  Examples of the polybutene include homo- or copolymers of isobutene and normal butene, and hydrogenated products thereof. Commercial products of polybutene include “LV-7”, “LV-50”, “LV-100”, “HV-15”, “HV-35”, “HV-50”, and “LV-7” manufactured by JX Energy Corporation. "HV-100", "HV-190", "HV-300", "SV-7000", "Tetrax 3T", "Tetrax 4T", "Tetrax 5T", "Tetrax 6T", "High" Mall 4H, "High Mall 5H", "High Mall 5.5H", "High Mall 6H"; "Nissan Polybutene 0N", "Nissan Polybutene 06N", "Nissan Polybutene 015N", "Nissan Polybutene 015N", manufactured by NOF Corporation "Nissan polybutene 3N", "Nissan polybutene 5N", "Nissan polybutene 10N", "Nissan polybutene 30N", "Nissan polybutene 200N"; "Gl" manufactured by BASF ssopal "; rice male Chemicals Co., Ltd." Indopol H-300 "," Indopol H-1900 "; ExxonMobil Chemical Co., Ltd. of" Parapol 950 "," Parapol 1300 ", and the like (all trade names).

Examples of the polybutadiene include homo- or copolymers of 1,2-butadiene and 1,4-butadiene and hydrogenated products thereof, and may have a hydroxyl group at a terminal. Commercial products of polybutadiene include “Nisso PB B-1000”, “Nisso PB B-2000”, “Nisso PB B-3000”, “Nisso PB BI-2000”, and “Nisso PB BI” manufactured by Nippon Soda Co., Ltd. -3000 ";Evonik's" PolyVEST 110 "," PolyVEST 130 "; Cray Valley's" Ricon 130 "," Ricon 131 "," Ricon 134 "," Ricon 144 "," Ricon 150 "," Ricon " 152, "Ricon 153", "Ricon 154", "Ricon 156", "Ricon 157";"UBEPOLBR" series manufactured by Ube Industries, Ltd .; "JSR RB" series manufactured by JSR Corporation; "Nipo" manufactured by l BR "series, available from Idemitsu Kosan Co., Ltd." Poly bd ^TM R-45HT "," Poly bd ^TM R-15HT "and the like (all trade names).

Examples of polyisoprene include homopolymers or copolymers of isoprene and hydrogenated products thereof, and may have a hydroxyl group at a terminal. Commercially available polyisoprenes include the "Nipol IR" series manufactured by Zeon Corporation; the "Kraprene" series manufactured by Kuraray Co., Ltd .; the "JSR IR" series manufactured by JSR Corporation; an Idemitsu Kosan Co., Ltd. “Poly ip ^™ ” and “EPOL ^™ ” (both are trade names).

  Examples of the amorphous polyalphaolefin include homopolymers and copolymers of olefins having 2 to 6 carbon atoms. Commercially available amorphous polyalphaolefins include "Eastflex" and "Aerafin" manufactured by Eastman; "REXtac" manufactured by REXtac; "Vestoplast" manufactured by Evonik (all of which are trade names).

(Propylene-based elastomer)
The propylene-based elastomer is an elastomer having a propylene unit as a main constituent unit. The elastomer is not limited by the density as long as it has rubber elastic properties, and may be chemically cross-linked or non-chemically cross-linked.

  Commercially available propylene elastomers include "Tuffmer XM", "Tuffmer PN", and "Tuffmer SN" manufactured by Mitsui Chemicals, Inc .; "Tufselen" manufactured by Sumitomo Chemical Co., Ltd .; Prime Polymer Co., Ltd. "Prime TPO" manufactured by Dow Chemical Co., Ltd .; "Vistamaxx" and "Linxar" manufactured by ExxonMobil Co., Ltd .; "Licocene" manufactured by Clariant; "Adflex" manufactured by Bathell, etc. (Both are trade names).

<Additives>
The propylene-based resin composition (S) may further contain a plasticizer, a tackifier, an antioxidant, an inorganic filler, an ultraviolet absorber, a light stabilizer, a lubricant, and the like, if necessary, as long as the object of the present invention is not impaired. Optional additives may be included. The content of the additive in the propylene-based resin composition (S) is preferably from 0% by mass to 20% by mass, and may be 1% by mass or 2% by mass, or 15% by mass or 10% by mass. It may be not more than mass%.

(Plasticizer)
Although it does not specifically limit as a plasticizer, What is used for a hot melt adhesive is preferable, More preferably, it is an oil or a wax. Further, as the plasticizer, phthalic esters, adipic esters, fatty acid esters, glycols, epoxy polymer plasticizers and the like can be used.

  Examples of the oil include a paraffin-based process oil, a naphthene-based process oil, and an isoparaffin-based oil.

  Commercially available paraffin-based process oils include "Diana Process Oil PW-32", "Diana Process Oil PW-90", "Diana Process Oil PW-150", and "Diana Process Oil PS-" manufactured by Idemitsu Kosan Co., Ltd. 32, "Diana Process Oil PS-90", "Diana Process Oil PS-430"; "Kaydol Oil" and "ParaLux Oil" manufactured by Chevron USA (all trade names).

  Commercially available isoparaffinic oils include “IP Solvent 1016”, “IP Solvent 1620”, “IP Solvent 2028”, “IP Solvent 2835”, “IP Clean LX” manufactured by Idemitsu Kosan Co., Ltd .; And "NA Solvent" series (both are trade names).

  Examples of the wax include animal wax, vegetable 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 Tropsch wax and the like can be exemplified.

(Tackifier)
Examples of the tackifier include, for example, hydrogenated derivatives of aliphatic hydrocarbon petroleum resins, rosin derivative resins, polyterpene resins, petroleum resins, oil-soluble phenol resins, and the like, which are solid, semi-solid, or liquid at room temperature. be able to. Specifically, natural rosin, modified rosin, hydrogenated rosin, glycerol ester of natural rosin, glycerol ester of modified rosin, pentaerythritol ester of natural rosin, pentaerythritol ester of modified rosin, pentaerythritol ester of hydrogenated rosin, natural Terpene copolymers, three-dimensional polymers of natural terpenes, hydrogenated derivatives of hydrogenated terpene copolymers, polyterpene resins, hydrogenated derivatives of phenolic modified terpene resins, aliphatic petroleum hydrocarbon resins, hydrogenation of aliphatic petroleum hydrocarbon resins Derivatives, aromatic petroleum hydrocarbon resins, hydrogenated derivatives of aromatic petroleum hydrocarbon resins, cycloaliphatic petroleum hydrocarbon resins, hydrogenated derivatives of cycloaliphatic petroleum hydrocarbon resins can be exemplified. These may be used alone or in combination of two or more. In the present invention, it is preferable to use a hydrogenated product in consideration of compatibility with the base polymer. Above all, hydrides of petroleum resins having excellent thermal stability are more preferable.

  Commercially available tackifiers include "Imarb" manufactured by Idemitsu Kosan Co., Ltd .; "UMEX" manufactured by Sanyo Chemical Industry Co., Ltd .; "HIRETS" manufactured by Mitsui Chemicals, Inc .; manufactured by Yashara Chemical Co., Ltd. "Clearon"; "ECR" manufactured by Tonen Chemical GK; "Alcon" manufactured by Arakawa Chemical Co., Ltd .; "Regalrez", "Eastotac", "Regalite" manufactured by Eastman Chemical Company; manufactured by Zeon Corporation "Quinton"; ExxonMobil's "Escolets"; Clay Valley's "Wingtac" and the like (all are trade names).

  Although the softening point of the tackifier is not particularly limited, the softening point of the tackifier is preferably -20 from the viewpoint of controlling the glass transition point and the elastic modulus of the hot melt adhesive within an appropriate range. C. or higher, more preferably -15.degree. C. or higher, still more preferably -10.degree. C. or higher, and preferably 180.degree. C. or lower, more preferably 170.degree. C. or lower, and still more preferably 160.degree. C. or lower.

(Antioxidant)
Examples of the antioxidant include trisnonylphenyl phosphite, distearylpentaerythritol diphosphite, “Adecastab 1178” (manufactured by ADEKA Corporation), “Stamylizer TNP” (manufactured by Sumitomo Chemical Co., Ltd.), and “Ilgaphos 168” (BASF), “Sandstab P-EPQ” (Sand) and other phosphorus-based antioxidants, 2,6-di-t-butyl-4-methylphenol, n-octadecyl-3- (3 ′, 5) Phenolic antioxidants such as'-di-t-butyl-4'-hydroxyphenyl) propionate, "SUMILIZER BHT" (manufactured by Sumitomo Chemical Co., Ltd.) and "Irganox 1010" (manufactured by BASF), dilauryl-3 , 3'-thiodipropionate, pentaerythritol tetrakis (3-laurylthiopropionate), "Sumi Examples of such sulfur-based antioxidants include Riser TPL (manufactured by Sumitomo Chemical Co., Ltd.), DLTP "Yoshitomi" (manufactured by Mitsubishi Chemical Corporation), and "Antiox L" (manufactured by NOF Corporation). .

  From the viewpoint of exhibiting a sufficient antioxidant effect, the content of the antioxidant is preferably 100% by mass or more, more preferably 500% by mass or more, based on 100% by mass of the propylene-based resin composition (S). It is preferably at least 1,000 ppm by mass, and preferably at most 5,000 ppm by mass, more preferably at most 4,000 ppm by mass, still more preferably at most 3,000 ppm by mass.

(Inorganic filler)
As the inorganic filler, talc, calcium carbonate, barium carbonate, wollastonite, silica, clay, mica, kaolin, titanium oxide, diatomaceous earth, urea resin, styrene beads, starch, barium sulfate, calcium sulfate, magnesium silicate, Examples thereof include magnesium carbonate, alumina, and quartz powder.

<Production method of propylene-based resin composition (S)>
The propylene-based resin composition (S) is dry-blended with a resin and additives other than the propylene homopolymer (A) and, if necessary, other than the propylene homopolymer (A) using a Henschel mixer or the like, It can be manufactured by melt-kneading with a single-screw or twin-screw extruder, a plast mill, a Banbury mixer, or the like.

<Physical properties of propylene resin composition (S)>
The propylene-based resin composition (S) has a solidification time measured by a rheometer of preferably 200 sec or more, more preferably 300 sec or more, and still more preferably, from the viewpoint of securing sufficient adhesive strength as a hot melt adhesive. Is 500 sec or more, and preferably 2,000 sec or less, more preferably 1,500 sec or less, and still more preferably 1,200 sec or less. When the solidification time is within the above range, the open time has an appropriate length and is suitable as a hot melt adhesive. The solidification time can be measured by the method described in the examples.

  The propylene-based resin composition (S) is suitable as a hot melt adhesive. Since a relatively low-viscosity propylene homopolymer (A) is used as the base polymer, it is excellent in fluidity and low-temperature coatability, and can be suitably used particularly for spray coating as a coating method.

  In addition, hot melt adhesives have excellent adhesiveness to various adherends including low-polar substances such as polyolefins, and also have excellent thermal stability when heated and melted. It can be suitably used for fibers, cans, filters, low pressure molding, and bag making. Specifically, for the packaging field (fixing cartons, cardboards, cushioning materials, repairing automatic packaging boxes, fixing samples, packing after unpacking, packing desiccants in food packaging, etc.), for electrical materials ( Fixing electronic components on C-board, temporary fixing, anti-vibration reinforcement, filling of connector empty space, substrate insulation, wire fixing, encapsulation), film adhesive processing, non-slip (film coating such as DM), housing, building materials ( Siding, tile, flooring, carpet, fabric, wallpaper, sample bonding), architecture and interior (bonding of insulation foam, kitchen tarpaulin, preventing fraying when cutting tatami mats, roof, veranda FRP, cracks, tiles), furniture, woodworking (Tables, chairs, sofas, beds, mirror cabinets, reinforcing material fixing, fabric bonding, frill fixing, Buddhist altars, binding, etc.), hobby, small Adhesives, accessories, traditional crafts, automotive industry (adhesion of dashboard anti-vibration reinforcement, adhesion of head / lamp case, door interior materials, thermal insulation and vibration-insulating materials, filters, temporary fixing in the assembly process, ceiling materials , Sofas, trunk carpets and mats), sanitary materials (assembly of diapers and sanitary products), medical care (assembly of sheets, surgical gowns and masks), textile laminates, assembly uses such as automobile floor mats, and nonwoven fabrics Alternatively, it can be suitably used for sanitary material applications typified by fixation of superabsorbent polymers (SAP).

  In particular, it is suitably used for bonding of a polyolefin-based material, and shows a well-balanced adhesiveness because a base polymer containing both a high elastic modulus component and a low elastic modulus component is used. Used for bonding between nonwoven fabrics, bonding between polyolefin film and polyolefin nonwoven fabric, preferably for bonding between PP nonwoven fabric and PP nonwoven fabric, between PE film and PP nonwoven fabric, and for bonding flat yarn cloth and polyolefin film. Used for bonding. Therefore, sanitary articles, such as disposable diapers and sanitary articles, a waterproof sheet, and a sandbag containing a hot melt adhesive are suitable.

  The propylene homopolymer (A) itself can be used as an adhesive showing a sufficient adhesiveness as a simple substance even without a plasticizer and a tackifier depending on the type of the adherend. For example, it is preferably used as an adhesive used in assembly applications such as automobile floor mats, sanitary materials applications such as fixing of nonwoven fabrics or superabsorbent polymers (SAP), and business applications such as textile laminates. Can be. The main reasons that these can be used are as follows. First, when the adherend has sufficient irregularities, the propylene homopolymer (A) alone can exhibit a sufficient anchor effect. Secondly, some of the above applications do not require strong adhesion in the first place, and there is no need to add a plasticizer and a tackifier to improve the adhesiveness. Third, in the above-mentioned applications, generation of odor and volatile components derived from the plasticizer and the tackifier is not desirable, and it is preferable to use only the propylene homopolymer (A) which does not generate odor or volatile components.

In addition, since the propylene-based resin composition (S) uses the propylene homopolymer (A), it is possible to impart vibration damping properties and soundproofing properties to the obtained molded article. In particular, it is suitable for members requiring vibration damping properties and soundproofing performance, such as floor mats for automobiles.
It is known that it is effective to increase the loss tangent: tan δ of the resin material in order to improve the performance of the vibration damping and soundproofing materials. The propylene homopolymer (A) has a feature that the glass transition point (Tg) is around 0 ° C., and tan δ is high in an actual use temperature environment. Here, tan δ is obtained by E ″ / E ′. Here, E ′ represents storage elastic modulus, and E ″ represents loss elastic modulus.
The tan δ can be determined by measuring by a solid viscoelasticity test. The larger the tan δ, the more excellent the vibration damping property and the soundproofing property. For example, in order to exhibit vibration damping and soundproofing performance for automobiles, tan δ at 0 ° C. is preferably 0.20 or more, more preferably 0.25 or more, and still more preferably 0.30 or more. Further, tan δ at 20 ° C. is preferably 0.05 or more, more preferably 0.10 or more, and still more preferably 0.12 or more.
The peak temperature of tan δ is preferably from -20 ° C to 40 ° C, more preferably from -10 ° C to 30 ° C, and still more preferably from -5 ° C to 25 ° C. Within this range, it can be said that the vibration damping property and the soundproofing property are excellent at −20 ° C. or more and 50 ° C or less, and that it has high vibration damping property and soundproofing at an actual use temperature.

[Adherend]
The arithmetic mean roughness (Sa) of the surface of the adherend used in the present invention is 40 μm or more.
Within the above range, a sufficient anchor effect is exhibited between the propylene-based resin composition (S) applied to the surface of the adherend and the adherend, and the adhesive strength is improved.

  In addition, from the viewpoint of making the anchor effect more sufficient, the arithmetic average roughness (Sa) of the surface of the adherend is preferably 45 μm or more, more preferably 50 μm or more, and further preferably 55 μm or more. And more preferably 60 μm or more. The upper limit is not particularly limited, but is, for example, 5 mm or less. The arithmetic average roughness (Sa) of the surface of the adherend is measured by the method described in Examples.

  The adherend used in the present invention is preferably a cloth (including a nonwoven fabric), paper, a porous film, a foamed molded article, and the like, and more preferably a cloth, wood, flat yarn cloth, from the viewpoint of obtaining sufficient adhesive strength. Alternatively, it is a foam molded article. Examples of the foam molded article include a foamed polypropylene molded article, a foamed polyethylene molded article, and a foamed polystyrene molded article. Further, it is preferably in the form of a sheet.

  From the viewpoint of obtaining a sufficient anchor effect, the thickness of the adherend is preferably 0.1 mm or more, more preferably 0.3 mm or more. The thickness of the adherend is measured by the method described in Examples.

[Method of bonding propylene-based resin composition (S) to adherend]
As a method for bonding the propylene-based resin composition (S) to the adherend, a method known to those skilled in the art can be appropriately used. For example, a method of applying the molten propylene-based resin composition (S) to the adherend, a method of heating the adherend after bringing the solid propylene-based resin composition (S) into contact with the adherend, A method in which a solid propylene-based resin composition (S) is brought into contact with a heated adherend, and the solvent is evaporated after dissolving the propylene-based resin composition (S) in a solvent and applying it to the adherend. And the like. Further, these can be appropriately combined.
In particular, in the method using the solid propylene-based resin composition (S), it is preferable to use a powdery solid from the viewpoint of easiness of melting and increase in the contact area. The powdery solid can be appropriately obtained by freeze-pulverization, grinder, adjustment of the production process of the propylene-based resin, or the like. The shape of the powder is not particularly limited, and may be spherical or amorphous. The particle size of the powder is not particularly limited, but is preferably, for example, 10 μm or more and 500 μm or less from the viewpoint of handling.
When the powdery propylene-based resin composition (S) is used, the powder may be used for powder molding. Examples of the powder molding include all molding methods that require resin powder, such as rotational molding, slush molding, sinter molding (powder metallurgy), powder pressure molding, laser sintering molding, and powder coating.

  Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

The materials used in each example and comparative example are as follows.
Propylene homopolymer (A-1): "S901", Idemitsu Kosan Co., Ltd. polypropylene wax: "Licocene PP7502", Clariant's FY: Flat yarn cloth; "Grand barrier cloth GBC-3-0550", Hagiwara ( Ltd., thickness 0.5 mm, arithmetic average roughness (Sa) is 64.5 μm (observation magnification 200 times)
NW: nonwoven fabric; composition is spunbond / meltblown / spunbond. The basis weight is 50 gsm, made of polypropylene, manufactured by Toray International Co., Ltd., and the arithmetic average roughness (Sa) is 54.5 μm (observation magnification: 200 times).
OPP: biaxially stretched polypropylene film; “FOR 12th”, manufactured by Futamura Chemical Co., Ltd., thickness: 20 μm, arithmetic mean roughness (Sa): 1.37 μm (observation magnification: 400 ×)
PET film; “Lumirror S10 # 50”, manufactured by Toray Industries, Inc., thickness 50 μm, arithmetic mean roughness (Sa) 0.08 μm (observation magnification 400 ×)

  The arithmetic mean roughness (Sa) of the above materials was measured using a confocal laser microscope (“OPTELICS H1200” manufactured by Lasertec) over a range of 1.0 cm × 1.0 cm of each material at the above observation magnification. did.

  The following measurement was performed about the propylene homopolymer (A-1). Table 1 shows the results.

[DSC measurement]
Using a differential scanning calorimeter ("DSC-7", manufactured by Perkin-Elmer Co., Ltd.), the sample was obtained by holding 10 mg of a sample at -10 ° C for 5 minutes under a nitrogen atmosphere, and then increasing the temperature at 10 ° C / minute. It was determined from the melting endotherm curve as the melting endotherm (ΔH-D). Further, the melting point (Tm-D) was determined from the peak top of the peak observed on the highest temperature side of the obtained melting endothermic curve.
The melting endotherm (ΔH-D) is calculated using a differential scanning calorimeter (manufactured by Perkin-Elmer Co., Ltd.) with a line connecting a low-temperature side having no change in calorie and a high-temperature side having no change in calorie as a baseline. , "DSC-7"), by calculating the area surrounded by the line portion including the peak of the melting endothermic curve obtained by DSC measurement and the base line.

[Viscosity measurement by B-type viscometer]
The melt viscosity at 190 ° C. (B-type viscosity) was measured using a Brookfield-type rotational viscometer according to ASTM D3236.

[Measurement of weight average molecular weight (Mw) and molecular weight distribution (Mw / Mn)]
The weight average molecular weight (Mw) and the number average molecular weight (Mn) were measured by gel permeation chromatography (GPC), and the molecular weight distribution (Mw / Mn) was determined. For the measurement, the following apparatus and conditions were used to obtain a weight average molecular weight and a number average molecular weight in terms of polystyrene. The molecular weight distribution (Mw / Mn) is a value calculated from the weight average molecular weight (Mw) and the number average molecular weight (Mn).
<GPC measurement device>
Column: "TOSO GMHHR-H (S) HT" manufactured by Tosoh Corporation
Detector: RI detection for liquid chromatogram "WATERS 150C" manufactured by Waters Corporation
<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 μL
Calibration curve: Universal Calibration
Analysis program: HT-GPC (Ver. 1.0)

[Measurement of tan δ]
Using a viscoelasticity measurement device (trade name: DMS 6100 (EXSTAR 6000), manufactured by SII NanoTechnology Inc.), the measurement was performed under a nitrogen atmosphere under the following conditions.
<Measurement conditions>
Measurement mode: Tensile mode Measurement temperature: Measurement was performed at -150 ° C to 230 ° C.
Heating rate: 5 ° C / min
Measurement frequency: 1 Hz
Sample size: length 10mm, width 4mm, thickness 1mm (press molded product)

Example 1
Using a 2-axis Labo Plast Mill (manufactured by Toyo Seiki Seisaku-sho, Ltd., with a 300 mm die), a propylene homopolymer (A-1) was produced at a die temperature of 230 ° C., an extrusion speed of 3 m / s, and a basis weight of 31.6 g / m ^2. Was extruded from a T-die onto a nonwoven fabric as an adherend under the conditions described in (1). Next, the propylene homopolymer (A-1) was covered with a polyester release film (“NZ211” manufactured by Toyobo Co., Ltd.) at a feed rate of 3 m / s. Thereafter, the mixture was cooled and solidified by a cooling roll having a roll temperature of 15 ° C., and was wound up to produce a resin-coated nonwoven fabric.

Example 2
A flat yarn cloth coated with a resin was produced in the same manner as in Example 1, except that the nonwoven fabric of the adherend was changed to a flat yarn cloth.

Comparative Example 1
A biaxially oriented polypropylene film coated with a resin was produced in the same manner as in Example 1 except that the nonwoven fabric of the adherend was changed to a biaxially oriented polypropylene film.

Example 3
A propylene homopolymer (A-1) and a propylene wax were converted to a propylene homopolymer (A-1) / propylene wax = 95 / The resin composition mixed at a mass ratio of 5 was extruded from a T die onto a flat yarn cloth as an adherend under the conditions of a die temperature of 230 ° C., an extrusion speed of 3 m / s, and a basis weight of 31.6 g / m ² . Next, the resin composition was covered with a polyester release film (“NZ211” manufactured by Toyobo Co., Ltd.) under the condition of a feeding speed of 3 m / s. Thereafter, the mixture was cooled and solidified by a cooling roll having a roll temperature of 15 ° C., and was wound up to produce a flat yarn cloth coated with a resin.

Comparative Example 2
A flat yarn cloth not coated with resin was used.

  The adhesive strength (peel strength) of each molded article obtained in the examples and comparative examples was measured by the following method (heat seal test A). Table 2 shows the results.

<Heat seal test A (measurement of peel strength)>
First, the molded product obtained in the example or the comparative example was cut into a size of 150 mm (MD) × 100 mm (CD) after the release film was peeled off to obtain a sheet 1.
Next, the sheet 2 was obtained by cutting the bonding target shown in Table 2 to a size of 190 mm (MD) × 140 mm (CD).
As shown in FIG. 1 (a), a 40 mm × 140 mm biaxially stretched polypropylene film 3 is placed on a sheet 2, and the sheet 1 is further placed on the biaxially-stretched polypropylene film 3. A heat seal treatment was performed. Thereafter, the heat-sealed sheet was cut at a width of 25 mm as shown in FIG. 1B, and the biaxially stretched polypropylene film was removed to prepare a measurement sample. The portion from which the biaxially stretched polypropylene film was removed was not heat-sealed between the sheet 1 and the sheet 2 and became a chuck grip portion during a tensile test.
The obtained measurement sample was subjected to a 90 ° peel test under the conditions of a tensile speed of 100 mm / s to measure the adhesive strength. The test was performed for three points, and the average value was calculated.

Example 4
Using a 2-axis Labo Plast Mill (manufactured by Toyo Seiki Seisaku-sho, Ltd., with a 300 mm die), a propylene homopolymer (A-1) was produced at a die temperature of 230 ° C., an extrusion speed of 3 m / s, and a basis weight of 31.6 g / m ^2. Was extruded from a T-die onto a flat yarn cloth as an adherend under the following conditions. Next, the top of the propylene homopolymer (A-1) was covered with a nonwoven fabric at a feed rate of 3 m / s. Thereafter, the mixture was cooled and solidified by a cooling roll having a roll temperature of 15 ° C., and was wound up to produce an adhesive molded article of a resin-coated flat yarn cloth and a nonwoven fabric.

Example 5
In Example 4, the same operation as in Example 4 was performed except that the nonwoven fabric was changed to a biaxially stretched polypropylene film, to produce an adhesive molded article of a resin-coated flat yarn cloth and a biaxially stretched polypropylene film.

  The adhesive molded products obtained in Examples 4 and 5 were measured for adhesive strength (peel strength) by the following method (heat seal test B). Table 3 shows the results.

<Heat seal test B (measurement of peel strength)>
The obtained adhesive molded body was subjected to a 90 ° peel test under the condition of a tensile speed of 100 mm / s to measure the adhesive strength. The test was performed for three points, and the average value was calculated.

Example 6
[Preparation of powder of propylene homopolymer (A-1)]
Pellets of the propylene homopolymer (A-1) were sufficiently cooled with liquid nitrogen at -196 ° C. Then, after pulverizing with a pulverizer, the obtained granules were sieved with a sieve having an opening of 500 μm. The granules remaining on the sieve were returned to the cooling step again and subjected to further pulverization and sieving. Thus, a powder of a propylene homopolymer (A-1) was obtained. The average particle size of the obtained powder was 190 μm as determined by an air jet sieve method.

[Production of laminated body]
The powder passed through the sieve was sprayed on the nonwoven fabric as the adherend so that the basis weight was 31.6 g / m ² . Next, the nonwoven fabric was covered with a biaxially stretched polypropylene film at a feed rate of 3 m / s. Further, the laminate obtained above was heated by setting the roll temperature to 120 ° C., and finally, cooled and solidified by a cooling roll having a roll temperature of 15 ° C., and wound up to obtain a nonwoven fabric and a biaxially oriented polypropylene film. Were laminated to produce a laminated body.

Comparative Example 3
In Example 6, the same operation as in Example 6 was performed, except that the nonwoven fabric of the adherend was changed to the PET film, to prepare a laminate in which the PET film and the biaxially stretched polypropylene film were bonded.

  With respect to the laminates obtained in Example 6 and Comparative Example 3, the adhesive force (peel strength) was measured by the following method (heat seal test C). Table 4 shows the results.

<Heat seal test C (measurement of peel strength)>
First, the laminate obtained in Example 6 or Comparative Example 3 was cut into a size of 25 mm (MD) × 100 mm (CD) to prepare a measurement sample. Next, the obtained measurement sample was subjected to a 90 ° peel test under a condition of a tensile speed of 100 mm / s to measure the adhesive strength. The test was performed for three points, and the average value was calculated.

  As can be seen from the results of the examples, it can be seen that the molded article obtained by combining the propylene-based resin composition (S) and the specific adherend shows high adhesive strength.

  The molded article of the present invention can improve the adhesive strength. The molded article of the present invention can be suitably used for sanitary materials, bookbinding, fibers, cans, filters, low pressure molding, and bag making. Specifically, for the packaging field (fixing cartons, cardboards, cushioning materials, repairing automatic packaging boxes, fixing samples, packing after unpacking, packing desiccants in food packaging, etc.), for electrical materials ( Fixing electronic components on C-board, temporary fixing, anti-vibration reinforcement, filling of connector empty space, substrate insulation, wire fixing, encapsulation), film adhesive processing, non-slip (film coating such as DM), housing, building materials ( Siding, tile, flooring, carpet, fabric, wallpaper, sample bonding), architecture and interior (bonding of insulation foam, kitchen tarpaulin, preventing fraying when cutting tatami mats, roof, veranda FRP, cracks, tiles), furniture, woodworking (Tables, chairs, sofas, beds, mirror cabinets, reinforcing material fixing, fabric bonding, frill fixing, Buddhist altars, binding, etc.), hobby, small Adhesives, accessories, traditional crafts, automotive industry (adhesion of dashboard anti-vibration reinforcement, adhesion of head / lamp case, door interior materials, thermal insulation and vibration-insulating materials, filters, temporary fixing in the assembly process, ceiling materials , Sofas, trunk carpets and mats), sanitary materials (assembly of diapers and sanitary products), medical care (assembly of sheets, surgical gowns and masks), textile laminates, assembly uses such as automobile floor mats, and nonwoven fabrics Alternatively, it can be suitably used for sanitary material applications represented by immobilization of superabsorbent polymers (SAP).

1 sheet 1 (molded article obtained in Examples or Comparative Examples)
2 Sheet 2 (for bonding)
3 Biaxially oriented polypropylene film

Claims (7)

  Using a differential scanning calorimeter (DSC), the sample was held at −10 ° C. for 5 minutes in a nitrogen atmosphere, and then heated at 10 ° C./min. A propylene-based resin composition (S) containing a propylene homopolymer (A) having a melting endotherm (ΔH-D) obtained from a melting endotherm curve of from 0 J / g to 80 J / g, from 80% by mass to 100% by mass. ) Is applied to the surface of the adherend, and the arithmetic mean roughness (Sa) of the surface of the adherend is 40 μm or more.   The molded article according to claim 1, wherein the polypropylene homopolymer (A) has a melt viscosity at 190 ° C of from 1,000 mPa · s to 500,000 mPa · s.   The molded article according to claim 1 or 2, wherein the solidification time of the propylene-based resin composition (S) measured by a rheometer is from 200 seconds to 1,500 seconds.   The molded article according to any one of claims 1 to 3, wherein the adherend is in a sheet shape.   The molded article according to claim 4, wherein the thickness of the adherend is 1 mm or more and 50 mm or less.   The molded article according to any one of claims 1 to 5, wherein the adherend is a cloth, a wood, or a foam molded article.   The molded article according to any one of claims 1 to 6, wherein the molded article is a textile laminate.