JP2024038766A - Laminate for furniture - Google Patents

Abstract

To provide a laminate designed for furniture, delivering a pleasant touch that is simultaneously smooth and moist, complemented by a leather-like luxurious look.SOLUTION: A laminate for furniture comprises a surface layer composed of a molded article of a thermoplastic elastomer composition, and a substrate layer. The surface layer has surface arithmetic average roughness Ra of more than 0 and less than 20 μm.SELECTED DRAWING: None

Description

The present invention relates to a laminate, and more particularly to a furniture laminate suitable for furniture use (hereinafter, these are collectively referred to simply as a "laminate").

Olefin-based thermoplastic elastomers are sometimes used for interior skin materials such as automobile instrument panels and door trims due to the need to reduce the weight of the material. Vacuum forming and injection molding are generally used to shape interior skin material sheets made of olefinic thermoplastic elastomers into the shapes of instrument panels, door trims, and the like.

As olefin thermoplastic elastomers for injection molding, for example, Patent Document 1 describes polypropylene resins, olefin copolymer rubbers, hydrogenated products of block copolymers having vinyl aromatic monomer units, and softeners. A composition containing a predetermined ratio of a polypropylene resin, a softener, and a polyorganosiloxane is proposed in Patent Document 2.

International Publication No. 2010/067564 pamphlet International Publication No. 2011/155571 Pamphlet

In Patent Documents 1 and 2, an olefinic thermoplastic elastomer is injection molded and then appropriately textured to impart a luxurious appearance similar to genuine leather.
The inventors' research has revealed that there is a need for improved texture and appearance in applications other than automobiles, such as furniture. However, in previous studies, sufficient consideration has been given to whether olefin-based thermoplastic elastomers, which are normally used for automobile interior skin materials, can be used in applications other than automobiles, such as furniture, to achieve the desired feel and appearance. It had not been done.

An object of the present invention is to provide a laminate for furniture that can provide a good tactile sensation, such as a smooth yet moist tactile sensation, and a luxurious appearance similar to leather, in applications such as furniture.

One aspect of the present invention relates to, for example, the following [1] to [8].
[1]
A furniture laminate comprising a surface layer made of a molded body of a thermoplastic elastomer composition and a base layer,
A laminate for furniture, wherein the surface layer has an arithmetic mean roughness Ra of more than 0 and less than 20 μm.

[2]
The furniture laminate according to [1], wherein the molded body has a tensile storage modulus smaller than that of the base layer.
[3]
The furniture laminate according to [1] or [2], wherein the surface layer has a thickness of 0.1 to 10 mm.
[4]
The furniture laminate according to any one of [1] to [3], wherein the base material layer contains at least one resin selected from the group consisting of urethane resin, polyolefin resin, and polyamide resin.

[5]
The furniture laminate according to any one of [1] to [4], wherein the base material layer has a curved surface.
[6]
The furniture laminate according to any one of [1] to [5], wherein the thermoplastic elastomer composition contains the following (A) to (C) in the following proportions.
(A) Propylene polymer: For 100 parts by mass,
(B) Ethylene/α-olefin copolymer containing ethylene and α-olefin units having 3 to 20 carbon atoms: range of 30 to 300 parts by mass,
(C) Softener: range of 30 to 280 parts by mass.

[7]
The furniture laminate according to [6], wherein the thermoplastic elastomer composition further contains the following (D) in the following proportions based on 100 parts by mass of the (A).
(D) Hydrogenated block copolymer having at least one block each consisting mainly of conjugated diene monomer units and one block mainly consisting of vinyl aromatic monomer units: 50 to 400 mass Department range.
[8]
The furniture laminate according to any one of [1] to [7], which is used for a chair.

According to the present invention, in applications such as furniture, it is possible to provide a furniture laminate that can provide a good texture such as a smooth yet moist texture and a luxurious appearance similar to leather.

In this specification, a numerical range expressed using "~" means a range that includes the numerical values written before and after "~" as lower and upper limits.
The furniture laminate of the present invention has a surface layer made of a molded article of a thermoplastic elastomer composition and a base layer.

Thermoplastic Elastomer Composition The thermoplastic elastomer composition according to the present invention is not particularly limited as long as it contains a known thermoplastic elastomer, but it may contain a polyolefin resin and can be injection molded into a sheet. A composition can be used, and a composition that has flexibility and has excellent texture when molded can be suitably used.

Specifically, the thermoplastic elastomer composition according to the present invention includes, for example, a composition containing a polyolefin resin and a softener. Preferred examples include thermoplastic elastomer compositions containing a propylene polymer (A), an ethylene/α-olefin copolymer (B), and a softener (C), and more preferably a thermoplastic elastomer composition containing a propylene polymer (A). ), a thermoplastic elastomer composition containing an ethylene/α-olefin copolymer (B), a softener (C), and a hydrogenated block copolymer (D).

<Propylene polymer (A)>
A propylene polymer (A) suitably used as one of the components of the thermoplastic elastomer composition of the present invention [hereinafter sometimes referred to as "component (A)"]. ] refers to a polymer in which the content of structural units derived from propylene among the structural units constituting the polymer is 50 mol% or more, and the content of structural units derived from propylene in component (A) is The content is preferably 90 mol% or more.

The number of component (A) according to the present invention may be one, or two or more.
Component (A) according to the present invention may be a propylene homopolymer or a copolymer of propylene and a comonomer other than propylene.

The structure of component (A) according to the present invention is not particularly limited; for example, the propylene-derived structural unit portion may have an isotactic structure, a syndiotactic structure, or an atactic structure, but an isotactic structure is preferred. It is preferable. Further, in the case of the copolymer, it may be of a random type (also referred to as random PP), a block type (also referred to as block PP: bPP), or a graft type.

The comonomer may be any other monomer copolymerizable with propylene, and α-olefins having 2 or 4 to 10 carbon atoms are preferred. Specific examples include ethylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene. , ethylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, and 1-octene are preferred. One type of comonomer may be used, or two or more types may be used.

The content of the structural unit derived from the comonomer in the copolymer is preferably 10 mol % or less from the viewpoint of flexibility and the like.
Component (A) according to the present invention may be synthesized by a conventionally known method, or a commercially available product may be used. Examples of commercially available products include polypropylene from Sun Allomer Co., Ltd., Prime Polypro from Prime Polymer Co., Ltd., Novatec from Nippon Polypropylene Co., Ltd., and SCG PP from SCG Plastics.

Component (A) according to the present invention may be a crystalline polymer or may be an amorphous polymer. Here, crystallinity means that the melting point (Tm) is observed in differential scanning calorimetry (DSC).

When the component (A) according to the present invention is a crystalline polymer, its melting point (according to the measuring method of JIS K 7121) is preferably 100°C or higher, more preferably 120°C from the viewpoint of heat resistance etc. The temperature is preferably 180°C or lower, more preferably 170°C or lower.

The MFR (according to ASTM D 1238-65T measurement method, 230°C, 2.16 kg load) of component (A) according to the present invention is preferably 0.1 to 100 g/10 minutes, more preferably 0. 1 to 50 g/10 minutes.
When the MFR of component (A) according to the present invention is within the above range, a composition having excellent heat resistance, mechanical strength, fluidity, and moldability can be easily obtained.

<Ethylene/α-olefin copolymer (B)>
The ethylene/α-olefin copolymer (B) suitably used as one of the components of the thermoplastic elastomer composition of the present invention includes units derived from ethylene and units derived from an α-olefin having 3 to 20 carbon atoms. It is an ethylene/α-olefin copolymer containing.

Ethylene/α-olefin copolymer (B) according to the present invention [hereinafter may be referred to as "component (B)". ] can be obtained by copolymerizing at least ethylene and an α-olefin having 3 to 20 carbon atoms. Examples of α-olefins having 3 to 20 carbon atoms include propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-heptene, 1-octene, 1-nonene, 1- Examples include decene, 1-undecene, 1-dodecene, and the like. Among these, from the viewpoint of imparting flexibility, α-olefins having 3 to 12 carbon atoms are preferred, propylene, 1-butene, and 1-octene are more preferred, and 1-octene is even more preferred.

Component (B) according to the present invention usually contains 70 to 99 mol%, preferably 80 to 97 mol% of units derived from ethylene, and 1 unit derived from an α-olefin having 3 to 20 carbon atoms. ~30 mol%, preferably 3~20 mol% [provided that the total amount of units derived from ethylene and units derived from α-olefin having 3 to 20 carbon atoms is 100 mol%. 〕It is in. It is preferable that the content ratio of units derived from ethylene is within the above range, since it is possible to obtain a thermoplastic elastomer composition with excellent mechanical strength.

Component (B) according to the present invention can be copolymerized with a monomer having an unsaturated bond, if necessary. Examples of monomers having unsaturated bonds include conjugated diolefins such as butadiene and isoprene; non-conjugated diolefins such as 1,4-hexadiene; cyclic diene compounds such as dicyclopentadiene and norbornene derivatives; and acetylenes. preferable. Among these, ethylidene norbornene (ENB) and dicyclopentadiene (DCP) are more preferred from the viewpoint of flexibility.

Component (B) according to the present invention usually has an MFR (ASTM D1238 load 2.16 kg, temperature 190°C) in the range of 0.1 to 20 g/10 minutes, preferably 0.3 to 10 g/10 minutes. .

By setting the MFR within the above range, a thermoplastic elastomer composition with better balance between fluidity and mechanical strength can be obtained.
Component (B) according to the present invention usually has a density in the range of 0.8 to 0.9 g/cm ³ .

Component (B) according to the present invention can be produced using a known polymerization catalyst such as a Ziegler-Natta catalyst, a vanadium catalyst, or a metallocene catalyst. The polymerization method is not particularly limited, and liquid phase polymerization methods such as solution polymerization method, suspension polymerization method, and bulk polymerization method, gas phase polymerization method, and other known polymerization methods can be used. Moreover, these copolymers are not limited as long as they exhibit the effects of the present invention, and can be obtained as commercially available products. Commercially available products include, for example, Engage 8842 (ethylene/1-octene copolymer) manufactured by Dow Chemical Company, Vistalon (registered trademark) manufactured by ExxonMobil, and Espren (registered trademark) manufactured by Sumitomo Chemical Co., Ltd. ), Mitsui EPT (registered trademark), Tafmer P (registered trademark), and Tafmer A (registered trademark) manufactured by Mitsui Chemicals, Inc.

<Softener (C)>
Softener (C) suitably used as one of the components of the thermoplastic elastomer composition of the present invention [hereinafter sometimes referred to as "component (C)"]. ] is not particularly limited, but a plasticizer commonly used for rubber can be used. From the viewpoint of compatibility with the propylene polymer (A) and the ethylene/α-olefin copolymer (B), process oils made of paraffinic, naphthenic, aromatic, etc. hydrocarbons are preferred. Among these component (C), a process oil mainly composed of paraffinic hydrocarbons is preferred from the viewpoint of weather resistance and coloring property, and a process oil mainly composed of naphthenic hydrocarbons is preferred from the viewpoint of compatibility. From the viewpoint of thermal and light stability, the content of aromatic hydrocarbons in the process oil is preferably 10% or less, and 5% or less in terms of the carbon number ratio specified in ASTM D2140-97. is more preferable, and even more preferably 1% or less.

<Hydrogenated product (D) of block copolymer>
Hydrogenated block copolymer (D), which is one of the components that may be included in the thermoplastic elastomer composition of the present invention (hereinafter, may be referred to as "component (D)"). ] is a hydrogenated product of a block copolymer having at least one block each consisting mainly of conjugated diene monomer units and at least one block consisting mainly of vinyl aromatic monomer units.

Component (D) according to the present invention is obtained by hydrogenating at least a portion of monomer units derived from a conjugated diene monomer (hereinafter sometimes referred to as "hydrogenation").
Here, the term "vinyl aromatic monomer unit" means a structural unit of a polymer resulting from polymerization of a vinyl aromatic monomer, and its structure is derived from a substituted vinyl group derived from substituted ethylene. This is a molecular structure in which the two carbon atoms of the group serve as bonding sites. Furthermore, the term "conjugated diene monomer unit" refers to a structural unit of a polymer produced as a result of polymerizing a conjugated diene monomer, and its structure consists of two olefins derived from the conjugated diene monomer. This is a molecular structure in which carbon is the bonding site.

In the component (D) according to the present invention, "containing mainly" means that the copolymer contains monomer units derived from a conjugated diene monomer (or vinyl aromatic monomer) in the copolymer block. This means that the block contains 50% by mass or more, preferably 60% by mass or more, more preferably 80% by mass or more. For example, a block mainly composed of conjugated diene monomer units means that the block contains monomer units derived from conjugated diene monomers in an amount of 50% by mass or more, preferably 60% by mass or more, and more preferably 80% by mass. % or more.

The vinyl aromatic monomer in component (D) according to the present invention is not particularly limited, and examples thereof include styrene, α-methylstyrene, p-methylstyrene, divinylbenzene, 1,1-diphenylethylene, N,N Examples include vinyl aromatic compounds such as -dimethyl-p-aminoethylstyrene and N,N-diethyl-p-aminoethylstyrene. These may be used alone or in combination of two or more. Among these, styrene is preferred from the viewpoint of economy.

The conjugated diene monomer in component (D) according to the present invention is a diolefin having a pair of conjugated double bonds, such as 1,3-butadiene (butadiene), 2-methyl-1,3- Examples include butadiene (isoprene), 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, 2-methyl-1,3-pentadiene, and 1,3-hexadiene. Among these, butadiene and isoprene are preferred from the viewpoint of economic efficiency. These may be used alone or in combination of two or more.

The arrangement of each block in component (D) according to the present invention is not particularly limited, and any suitable arrangement can be adopted as appropriate. For example, if a polymer block made of vinyl aromatic monomer units is represented by S and a polymer block made of conjugated diene monomer units at least partially hydrogenated is represented by B, this block Hydrogenated polymers include SB, S(BS) _n1 (where n1 represents an integer of 1 to 3), and S(BSB) _n2 (where n2 represents an integer of 1 to 2). ), and (SB) _n3 X (where n3 represents an integer of 3 to 6. (represents a residue). Among these, SB type 2 (diblock), SBS type 3 (triblock), and SBSB type 4 (tetrablock) linear block copolymers are preferred.

Here, even if the polymer block B is a polymer block consisting only of conjugated diene monomer units, it mainly contains conjugated diene monomer units and also contains vinyl aromatic monomer units (conjugated diene monomer units). It may be a polymer block in which a monomer unit and a vinyl aromatic monomer unit are copolymerized, and at least a portion of the conjugated diene monomer unit in each polymer block is hydrogenated.

The content of vinyl aromatic monomer units in component (D) according to the present invention is 30 to 80% by mass, preferably 40 to 80% by mass from the viewpoint of heat resistance and dispersibility, and 50 to 80% by mass. More preferably, it is 70% by mass. By setting the content of vinyl aromatic monomer units to 30% by mass or more, the mechanical properties can be further improved, and by setting the content to 80% by mass or less, the low-temperature properties can be further improved.

The content of vinyl aromatic monomer units in component (D) according to the present invention can be measured by nuclear magnetic resonance spectroscopy (NMR).
From the viewpoint of mechanical strength, the content of the vinyl aromatic monomer unit block in component (D) according to the present invention is preferably 10% by mass or more, more preferably 10 to 40% by mass. preferable. Here, the content of the vinyl aromatic compound polymer block in component (D) is determined by a method (I.M. The mass of the vinyl aromatic compound polymer block obtained by the method described in Kolthoff, et al., J. Polym. Here, it is defined by the following formula using (excluding vinyl aromatic compound polymers having an average degree of polymerization of about 30 or less).
Content of vinyl aromatic compound polymer block (mass%) = (mass of vinyl aromatic compound polymer block in copolymer before hydrogenation/mass of copolymer before hydrogenation) x 100

When a plurality of polymer blocks are present in the component (D) according to the present invention, the structures such as the molecular weight and composition of each block may be the same or different. For example, component (D) contains a hydrogenated copolymer block containing a conjugated diene monomer unit and a vinyl aromatic monomer unit, and a hydrogenated copolymer block mainly composed of a conjugated diene monomer unit. may exist. The boundaries and edges of each block do not necessarily need to be clearly distinguished. The mode of distribution of the vinyl aromatic monomer units in each polymer block is not particularly limited, and may be uniformly distributed, tapered, stepped, convex, or concave. Good too. Moreover, a crystal part may be present in the polymer block.

The mode of distribution of the vinyl units of the conjugated diene monomer units in each polymer block in the component (D) according to the present invention is not particularly limited, and for example, the distribution may be biased. Examples of methods for controlling the distribution of vinyl units include adding a vinylizing agent during polymerization and changing the polymerization temperature. Further, the distribution of the hydrogenation rate of the conjugated diene monomer units may be uneven. The hydrogenation rate distribution can be determined by changing the distribution of vinyl units, or by copolymerizing isoprene and butadiene and then hydrogenating them using a hydrogenation catalyst, which will be described later. This can be controlled by a method that utilizes the difference between the two.

In component (D) according to the present invention, from the viewpoint of heat resistance, aging resistance and weather resistance, preferably 75 mol% or more of the unsaturated bonds contained in the conjugated diene monomer unit before hydrogenation are More preferably, 85 mol% or more is hydrogenated, and even more preferably 97 mol% or more is hydrogenated.

The hydrogenation catalyst used for hydrogenation is not particularly limited, and is conventionally known. hydrogenation catalyst,
(2) A so-called Ziegler-type hydrogenation catalyst using an organic acid salt such as Ni, Co, Fe, or Cr or a transition metal salt such as an acetylacetone salt and a reducing agent such as an organic aluminum;
(3) Homogeneous hydrogenation catalysts such as so-called organometallic complexes such as organometallic compounds such as Ti, Ru, Rh, and Zr can be used.

Specific hydrogenation catalysts include Japanese Patent Publication No. 42-008704, Japanese Patent Publication No. 43-006636, Japanese Patent Publication No. 63-004841, Japanese Patent Publication No. 01-037970, Japanese Patent Publication No. 01-053851, Hydrogenation catalysts described in Publication No. 02-009041 and the like can be used. Among these, preferred hydrogenation catalysts include reducing organometallic compounds such as titanocene compounds.

As the titanocene compound, for example, the compounds described in JP-A-08-109219 can be used, and specific examples include (substituted ) Examples include compounds having at least one ligand having a cyclopentadienyl skeleton, an indenyl skeleton, or a fluorenyl skeleton.

Examples of the reducing organometallic compound include organic alkali metal compounds such as organolithium, organomagnesium compounds, organoaluminum compounds, organoboron compounds, organozinc compounds, and the like.

The method of polymerizing the block copolymer before hydrogenation in component (D) according to the present invention is not particularly limited, and any known method may be employed. For example, JP 36-019286, JP 43-017979, JP 46-032415, JP 49-036957, JP 48-002423, JP 48-004106, Examples include methods described in Japanese Patent Publication No. 56-028925, Japanese Patent Application Laid-open No. 59-166518, and Japanese Patent Application Laid-open No. 60-186577.

If necessary, component (D) may have a polar group. Examples of polar groups include hydroxyl group, carboxyl group, carbonyl group, thiocarbonyl group, acid halide group, acid anhydride group, thiocarboxylic acid group, aldehyde group, thioaldehyde group, carboxylic acid ester group, amide group, and sulfonic acid group. group, sulfonic acid ester group, phosphoric acid group, phosphoric acid ester group, amino group, imino group, nitrile group, pyridyl group, quinoline group, epoxy group, thioepoxy group, sulfide group, isocyanate group, isothiocyanate group, silicon halide group, an alkoxysilicon group, a tin halide group, a boronic acid group, a boron-containing group, a boronic acid group, an alkoxytin group, a phenyltin group, and the like.

The vinyl bond content in the conjugated diene monomer units in the block copolymer before hydrogenation in component (D) according to the present invention is preferably 5 mol% or more from the viewpoint of flexibility and scratch resistance. From the viewpoint of elongation at break and scratch resistance, the content is preferably 70 mol% or less. The vinyl bond content in the conjugated diene monomer unit is more preferably 10 to 50 mol%, even more preferably 10 to 30 mol%, even more preferably 10 to 25 mol%.

Here, the vinyl bond content refers to the 1,2-bond content of the 1,2-bond, 3,4-bond, and 1,4-bond incorporated in the conjugated diene before hydrogenation. It means the proportion of those incorporated through bonds and 3,4-bonds. Vinyl bond content can be measured by NMR.

The weight average molecular weight of component (D) before crosslinking is not particularly limited, but from the viewpoint of scratch resistance it is preferably 50,000 or more, and from the viewpoint of molding fluidity it is preferably 400,000 or less, more preferably is 50,000 to 300,000. Although the molecular weight distribution (Mw/Mn: weight average molecular weight/number average molecular weight) is not particularly limited, it is preferably a value close to 1 from the viewpoint of scratch resistance. The weight average molecular weight and number average molecular weight were determined by gel permeation chromatography (GPC; manufactured by Shimadzu Corporation, device name: LC-10) using tetrahydrofuran (1.0 mL/min) as a solvent and an oven temperature of 40°C. ), column: TSKgelGMHXL (4.6 mm ID x 30 cm, 2 columns). The weight average molecular weight (Mw), number average molecular weight (Mn), and molecular weight distribution (Mw/Mn) are calculated as polystyrene equivalent molecular weight.

The block mainly composed of conjugated diene monomer units of component (D) according to the present invention is a copolymer block mainly containing conjugated diene monomer units and also containing vinyl aromatic monomer units. This is preferable from the viewpoint of wear resistance.

Component (D) according to the present invention is not particularly limited, and the above-mentioned conjugated diene monomers and vinyl aromatic monomers can be used. Among them, from the viewpoint of the balance between mechanical strength and impact resistance, preferred combinations include blocks containing butadiene units and styrene units, blocks containing isoprene units and styrene units, and the like.

Component (D) according to the present invention may contain at least conjugated diene monomer units as a main component, and the content of each monomer is not particularly limited. In particular, from the viewpoint of the balance between mechanical strength and impact resistance, the content of vinyl aromatic monomer units in the copolymer block is preferably 10% by mass or more and less than 50% by mass, and 20% by mass or more. More preferably, it is less than 50% by mass.

<Polyorganosiloxane (E)>
The thermoplastic elastomer composition according to the present invention may contain polyorganosiloxane, if necessary.
Polyorganosiloxane (E) is one of the components that may be included in the thermoplastic elastomer composition of the present invention [hereinafter sometimes referred to as "component (E)"]. ] is not particularly limited, but preferably has a linear, branched, or crosslinked polymer structure from the viewpoint of abrasion resistance and feel to the touch.

Component (E) according to the present invention is not particularly limited, and known components can also be used. Preferred polyorganosiloxanes include polymers containing siloxane units having substituents such as alkyl groups, vinyl groups, and aryl groups. Among these, polyorganosiloxanes having alkyl groups are particularly preferred, and polyorganosiloxanes having methyl groups are particularly preferred. Siloxane is more preferred.

Specific examples of polyorganosiloxanes having methyl groups include polydimethylsiloxane, polymethylphenylsiloxane, polymethylhydrogensiloxane, and the like. Among these, polydimethylsiloxane is preferred.

The kinematic viscosity of component (E) according to the present invention is not particularly limited, but from the viewpoint of wear resistance and scratch resistance, the kinematic viscosity (25°C) specified in JIS Z8803 is 5000 centistokes (cSt) or more. It is preferable that there be. In addition, from the viewpoint that the dispersibility of component (E) in the resulting thermoplastic elastomer composition tends to improve, the appearance is excellent, and the quality stability during melt extrusion also tends to be further improved, component (E) Preferably, the kinematic viscosity is less than 3 million cSt. The kinematic viscosity of component (E) is more preferably 10,000 cSt or more and less than 3 million cSt, and even more preferably 50,000 cSt or more and less than 3 million cSt.

<Thermoplastic elastomer composition>
The thermoplastic elastomer composition according to the present invention may be a composition containing a known thermoplastic elastomer, as long as it can achieve a predetermined arithmetic mean roughness after molding. Preferably, thermoplastic elastomer compositions containing a propylene polymer (A), an ethylene/α-olefin copolymer (B), and a softener (C) are mentioned. More preferred are thermoplastic elastomer compositions containing a propylene polymer (A), an ethylene/α-olefin copolymer (B), a softener (C), and a hydrogenated block copolymer (D). It will be done.

When the thermoplastic elastomer composition according to the present invention is a composition containing a propylene polymer (A), an ethylene/α-olefin copolymer (B), and a softener (C), the composition includes: Preferably,
With respect to 100 parts by mass of the propylene polymer (A),
From the viewpoint of flexibility and scratch resistance, the ethylene/α-olefin copolymer (B) is contained in an amount of 30 to 300 parts by mass, preferably 50 to 300 parts by mass, more preferably 60 to 200 parts by mass, and still more preferably 70 to 300 parts by mass. A range of 100 parts by mass,
The softener (C) is in the range of 30 to 280 parts by mass, more preferably 31 to 200 parts by mass, even more preferably 32 to 170 parts by mass, particularly preferably 33 to 150 parts by mass, from the viewpoint of moldability and heat resistance. Included in

In addition to the above-mentioned components (B) and (C), the above-mentioned thermoplastic elastomer composition according to the present invention contains, from the viewpoints of moldability and scratch resistance, preferably 50 to 400 parts by mass, more preferably 55 to 300 parts by mass, even more preferably 60 to 200 parts by mass, and particularly preferably 65 to 150 parts by mass of the hydrogenated block copolymer (D) per 100 parts by mass of the propylene-based polymer (A).

In addition to the above component (B) and the above component (C), the thermoplastic elastomer composition according to the present invention preferably contains the polyorganosiloxane based on 100 parts by mass of the propylene polymer (A). It contains (E) in an amount of 2 to 30 parts by weight, more preferably 3 to 20 parts by weight, and still more preferably 4 to 10 parts by weight.

When the blending amount of polyorganosiloxane (E) is 2 parts by mass or more based on 100 parts by mass of the propylene polymer (A), the effect of improving scratch resistance is sufficiently exhibited, and when it is 30 parts by mass or less, heat resistance Excellent dispersibility in plastic elastomer compositions. From the viewpoint of moldability and scratch resistance, the thermoplastic elastomer composition of the present invention preferably has a mass ratio (C/B) of ethylene/α-olefin copolymer (B) to softener (C) of 0 or less. It is more than 3 and less than 3, more preferably 0.20 to 2.50, even more preferably 0.30 to 2.00.

The thermoplastic elastomer composition of the present invention may contain the following organic peroxide (F) [hereinafter sometimes referred to as "component (F)"], if necessary. ] is preferably included.
Component (F) according to the present invention is obtained by dynamically heat-treating the thermoplastic elastomer composition of the present invention to obtain component (A), component (B), and component of the thermoplastic elastomer composition of the present invention. It acts as a crosslinking initiator for (D).

<Organic peroxide (F)>
Specific examples of the organic peroxide (F) according to the present invention include 1,1-bis(t-butylperoxy)-3,3,5-trimethylcyclohexane, 1,1-bis(t-hexylperoxy) )-3,3,5-trimethylcyclohexane, 1,1-bis(t-hexylperoxy)cyclohexane, 1,1-bis(t-butylperoxy)cyclododecane, 1,1-bis(t-butylperoxy)cyclohexane oxy)cyclohexane, 2,2-bis(t-butylperoxy)octane, n-butyl-4,4-bis(t-butylperoxy)butane, n-butyl-4,4-bis(t-butylperoxy) Peroxyketals such as oxy)valerate; di-t-butyl peroxide, dicumyl peroxide, t-butylcumyl peroxide, α,α'-bis(t-butylperoxy-m-isopropyl)benzene, α , α'-bis(t-butylperoxy)diisopropylbenzene, 2,5-dimethyl-2,5-bis(t-butylperoxy)hexane, 2,5-dimethyl-2,5-bis(t-butyl) dialkyl peroxides such as peroxy)hexine-3; acetyl peroxide, isobutyryl peroxide, octanoyl peroxide, decanoyl peroxide, lauroyl peroxide, 3,5,5-trimethylhexanoyl peroxide, benzoyl peroxide oxide, diacyl peroxides such as 2,4-dichlorobenzoyl peroxide and m-trioyl peroxide; t-butyl peroxyacetate, t-butyl peroxyisobutyrate, t-butyl peroxy-2-ethyl hexa Noate, t-butylperoxylaurylate, t-butylperoxybenzoate, di-t-butylperoxyisophthalate, 2,5-dimethyl-2,5-di(benzoylperoxy)hexane, t-butylperoxybenzoate Peroxyesters such as oxymaleic acid, t-butyl peroxyisopropyl carbonate, cumyl peroxyoctate; t-butyl hydroperoxide, cumene hydroperoxide, diisopropylbenzene hydroperoxide, 2,5-dimethylhexane-2 , 5-dihydroperoxide, and 1,1,3,3-tetramethylbutyl peroxide.

Among these components (F), from the viewpoint of thermal decomposition temperature and crosslinking performance, 1,1-bis(t-butylperoxy)-3,3,5-trimethylcyclohexane, di-t-butylperoxide, Milperoxide, 2,5-dimethyl-2,5-bis(t-butylperoxy)hexane, and 2,5-dimethyl-2,5-bis(t-butylperoxy)hexyne-3 are preferred.

The component (F) according to the present invention may be used alone or in combination of two or more.
When the thermoplastic elastomer composition of the present invention contains component (F), the content is preferably 0.5 to 5 parts by mass based on 100 parts by mass of component (A) from the viewpoint of molding fluidity. , more preferably 1 to 3 parts by mass.
When the thermoplastic elastomer composition of the present invention contains component (F), it is preferable to use the following crosslinking aid together.

<Crosslinking aid>
The crosslinking aid according to the present invention includes various known crosslinking aids, specifically monofunctional monomers and polyfunctional monomers. Such crosslinking aids can control the crosslinking reaction rate.

As the monofunctional monomer, for example, radically polymerizable vinyl monomers are preferable, such as aromatic vinyl monomers, unsaturated nitrile monomers such as acrylonitrile and methacrylonitrile, acrylic acid ester monomers, Examples include methacrylic acid ester monomers, acrylic acid monomers, methacrylic acid monomers, maleic anhydride monomers, and N-substituted maleimide monomers.

Specific examples of monofunctional monomers include styrene, methylstyrene, chloromethylstyrene, hydroxystyrene, tert-butoxystyrene, acetoxystyrene, chlorostyrene, acrylonitrile, methacrylonitrile, methyl acrylate, ethyl acrylate, and acrylic. n-butyl acid, isobutyl acrylate, methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, 2-ethylhexyl methacrylate, maleic anhydride, methylmaleic anhydride, 1,2-dimethylmaleic anhydride , ethylmaleic anhydride, phenylmaleic anhydride, N-methylmaleimide, N-ethylmaleimide, N-cyclohexylmaleimide, N-laurylmaleimide, N-cetylmaleimide and the like. Among these, styrene, acrylonitrile, methacrylonitrile, methyl acrylate, maleic anhydride, N-methylmaleimide and the like are preferred from the viewpoint of ease of reaction and versatility. These monofunctional monomers may be used alone or in combination of two or more.

The polyfunctional monomer is a monomer having a plurality of radically polymerizable functional groups as a functional group, and preferably a monomer having a vinyl group. The number of functional groups in the polyfunctional monomer is preferably two or three.

Specific examples of polyfunctional monomers include divinylbenzene, triallyl isocyanurate, triallyl cyanurate, diacetone diacrylamide, polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, and trimethylolpropane triacrylate. , ethylene glycol dimethacrylate, triethylene glycol dimethacrylate, diethylene glycol dimethacrylate, diisopropenylbenzene, p-quinone dioxime, p,p'-dibenzoylquinone dioxime, phenylmaleimide, allyl methacrylate, N,N'-m -Phenylene bismaleimide, diallyl phthalate, tetraallyloxyethane, 1,2-polybutadiene and the like are preferred, and divinylbenzene and triallyl isocyanurate are more preferred. These polyfunctional monomers may be used alone or in combination of two or more.
When the thermoplastic elastomer composition of the present invention contains a crosslinking aid, the amount is 1 to 100 parts by weight, preferably 1 to 50 parts by weight, based on 100 parts by weight of component (F).

<Production method and physical properties of thermoplastic elastomer composition>
By dynamically crosslinking the thermoplastic elastomer composition, at least a portion of component (A), component (B), and component (D) contained in the thermoplastic elastomer composition (for example, at least (partially) is crosslinked. When performing dynamic crosslinking, it is preferable to perform dynamic heat treatment in the presence of the component (F) or in the presence of the component (F) and the crosslinking aid.

In the present invention, "dynamically heat-treating" refers to kneading in a molten state.
In addition, with respect to the thermoplastic elastomer composition according to the present invention, the composition before being dynamically heat-treated is also referred to as "composition 1", and the composition obtained after being dynamically heat-treated is also referred to as "composition 2".

The dynamic heat treatment in the present invention is preferably carried out in a closed-type apparatus, and is preferably carried out in an atmosphere of an inert gas such as nitrogen or carbon dioxide gas. The temperature of the heat treatment is in the range of 300°C from the melting point of component (A), usually 150 to 270°C, preferably 170 to 250°C. The kneading time is usually 1 to 20 minutes, preferably 1 to 10 minutes. Further, the applied shearing force is usually in the range of 10 to 50,000 s ^-1 , preferably 100 to 10,000 s ^-1 in terms of shear rate.

The Shore A hardness (10 second value) of Composition 2 (according to the measuring method of JIS K 6253) is preferably 50 to 100, more preferably 60 to 90, and even more preferably 65 to 80.

When the Shore A hardness (10 second value) of Composition 2 is within the above range, it is possible to easily form a molded article having design properties such as touch and high-grade appearance, and scratch resistance.
Specifically, the Shore A hardness (10 second value) can be measured by the method described in the Examples below.

The melt flow rate of Composition 2 (according to the measurement method of JIS K 7210, 230°C, 1.2 kg load) is preferably 0.1 to 100 g/10 minutes from the viewpoint of providing a composition with excellent moldability. , more preferably 5 to 90 g/10 minutes, still more preferably 10 to 80 g/10 minutes.

In addition to the above-mentioned component (A), the thermoplastic elastomer composition of the present invention may contain an inorganic filler, a plasticizer, and other additives.
Examples of the inorganic filler include calcium carbonate, magnesium carbonate, silica, carbon black, glass fiber, titanium oxide, clay, mica, talc, magnesium hydroxide, aluminum hydroxide, and the like.

Examples of the plasticizer include polyethylene glycol, phthalate esters such as dioctyl phthalate (DOP), and the like.
Examples of other additives include organic and inorganic pigments such as carbon black, titanium dioxide, and phthalocyanine black; 2,6-di-t-butyl-4-methylphenol and n-octadecyl-3-(3,5' - Thermal stabilizers such as di-t-butyl-4-hydroxyphenyl) propionate; Antioxidants such as trisnonylphenyl phosphite and distearyl pentaerythritol diphosphite; 2-(2'-hydroxy-5' methyl UV absorbers such as phenyl)benzotriazole and 2,4-dihydroxybenzophenone; bis-[2,2,6,6-tetramethyl-4-piperidinyl]sebacate, tetrakis(2,2,6,6-tetramethyl- Light stabilizers such as 4-piperidinyl)-1,2,3,4-butanetetracarboxylate; Flame retardants such as ammonium polyphosphate, trioctyl phosphate, and magnesium hydroxide; Silicones such as dimethyl silicone oil and methylphenyl silicone oil. Oil; Anti-blocking agents such as stearic acid amide and erucic acid amide; Foaming agents such as sodium bicarbonate and N,N'-dinitrosopentamethylenetetramine; Antistatic agents such as palmitic acid monoglyceride and stearic acid monoglyceride; Supporting silver ions Examples include antibacterial agents such as zeolite and silver thiosulfite complex.

<Molded object>
The surface layer of the furniture laminate of the present invention consists of a molded article of the above-mentioned thermoplastic elastomer composition.
The molded product is a molded product obtained by molding the thermoplastic elastomer composition using any known molding method. Examples of the molding method include press molding, injection molding, extrusion molding, calendar molding, blow molding, vacuum molding, and compression molding. From the viewpoint of productivity and the ability to easily form a complicated shape, an injection molded article formed using an injection molding method is preferable. In particular, a molded article having an arithmetic mean surface roughness and a coefficient of dynamic friction as described below and having an excellent appearance and feel can be produced by, for example, a molding method such as injection molding using a mold having a textured shape, or a known method. It can be obtained by applying texture to at least the surface side of the furniture laminate, such as by forming it into a sheet shape or the like and then applying embossing.

The arithmetic mean roughness (Ra) of the surface of the surface layer, which is the surface of the laminate, that is, the arithmetic mean roughness (Ra) of the surface of the molded body is greater than 0 and less than 20 μm, preferably 0.1 to 15 μm. It is more preferably 0.5 to 10 μm, and even more preferably 1 to 8 μm. When the arithmetic mean roughness (Ra) of the surface of the molded body is within the above range, the laminate of the present invention has a good appearance and feel.

The coefficient of dynamic friction of the surface of the molded body, which is the surface of the laminate, is preferably 0.10 to 0.70, more preferably 0.20 to 0.60. When the dynamic friction coefficient of the surface of the molded body is within the above range, the tactile sensation of the laminate of the present invention becomes better.
Further, the thickness of the molded body serving as the surface layer is preferably 0.1 to 10 mm, more preferably 0.5 to 5 mm. The width and length of the molded body (that is, the dimensions of the molded body excluding the thickness) are not particularly limited, and can be appropriately set according to the purpose.

<Base material layer>
The laminate has a base layer. By laminating the base material layer and the molded article, the shape of the laminated body can be maintained and the durability of the laminated body can be increased.
The base material layer is not particularly limited, but urethane resins, polyolefin resins, polyamide resins, etc. can be used, preferably containing at least one resin selected from the group consisting of urethane resins, polyolefin resins, and polyamide resins, and more Preferably, it contains at least one resin selected from the group consisting of urethane resin (especially thermoplastic urethane resin (TPU)), polypropylene, and nylon.

The shape of the base material layer is not particularly limited, and may be any shape such as a columnar shape, a semi-cylindrical shape, a flat plate, or a square shape, but it is preferably a shape having a curved surface such as a circular columnar shape or a semi-cylindrical shape. . The dimensions of the base layer (that is, the thickness, width, and length of the base layer) are not particularly limited, and can be appropriately set according to the purpose.

<Laminated body>
The laminate of the present invention is formed by laminating the above-mentioned molded body and the above-mentioned base material layer. The molded body and the base material layer may be directly laminated, or may be laminated via a known pressure-sensitive adhesive, adhesive, adhesive tape, adhesive tape, adhesive film, adhesive film, adhesive sheet, adhesive sheet, etc. .

In the laminate of the present invention, it is preferable that the molded body has a tensile storage modulus smaller than that of the base layer. Moreover, it is more preferable that the tensile elastic modulus of the said base material layer is 10 times or more of the tensile storage elastic modulus of the said molded object, and it is more preferable that it is 20 times or more. When the tensile storage modulus of the molded article and the tensile modulus of the base layer satisfy the above relationship, the shape retention of the laminate by the base layer and the tactile improvement effect by the surface layer become better.

Further, the tensile storage modulus of the molded article is preferably 3 to 90 MPa, more preferably 15 to 75 MPa, and even more preferably 30 to 60 MPa. When the tensile storage modulus of the molded article is within the above range, the surface layer provides a better tactile improvement effect.
Further, the tensile modulus of the base layer is preferably 500 to 2,500 MPa, more preferably 600 to 2,200 MPa, and even more preferably 1,000 to 1,800 MPa. When the tensile modulus of the base layer is within the above range, the base layer has a good effect of maintaining the shape of the laminate.

The laminate of the present invention has a tactile feel that is preferred by consumers and a luxurious appearance similar to genuine leather, and its use is not particularly limited. It can be suitably used for furniture that has not been previously manufactured.

To give specific examples, the laminate of the present invention can be used for chairs (for example, armrest members, handles, levers, backs, buttons, and seats of office chairs; armrest members, handles, levers, backs, buttons, and seats of household chairs). Can be used for office desk tops; home desk tops, etc.

EXAMPLES Hereinafter, the present invention will be described in more detail based on Examples, but the present invention is not limited to these Examples at all.

In the Examples and Comparative Examples, the following polymers were used.
[Propylene polymer (A)]
As the propylene polymer (A-1), a propylene homopolymer (homo PP) (trade name: SunAllomer (registered trademark)) with a melt flow rate (MFR) of 2.0 g/10 minutes at 230°C and a load of 2.16 kg is used. ) PL400A manufactured by Sun Allomer Co., Ltd.) was used.

[Ethylene/α-olefin copolymer (B)]
As the ethylene/α-olefin copolymer (B-1), an ethylene/1-octene copolymer (manufactured by Dow Chemical Company, trade name “Engage 8842”) was used. The ethylene content of the copolymer is 55% by mass, the octene content is 45% by mass, the MFR measured under the conditions of temperature: 190 ° C. and load: 2.16 kg is 1.0 g / 10 minutes. .

[Softener (C)]
As the softener (C-1), paraffin oil (manufactured by Idemitsu Kosan Co., Ltd., trade name "Diana Process Oil PW-100") was used.

[Hydrogenated product (D) of block copolymer]
As the hydrogenated block copolymer (D), a hydrogenated block copolymer produced by the method shown below was used.

[Production of hydrogenated block copolymer (D-1)]
(1) Preparation of hydrogenation catalyst The hydrogenation catalyst used in the hydrogenation reaction of the block copolymer was prepared by the following method. Charge 1 L of dried and purified cyclohexane into a reaction vessel purged with nitrogen, add 100 mmol of bis(cyclopentadienyl)titanium dichloride, and while stirring thoroughly, add an n-hexane solution containing 200 mmol of trimethylaluminum. The reaction was allowed to proceed at room temperature for about 3 days.

(2) Production of hydrogenated product of block copolymer Batch polymerization was carried out using a stirring device and a jacketed tank reactor with an internal volume of 10 L. First, 6.4 L of cyclohexane and 75 g of styrene were added, and TMEDA was added in advance so that the mole amount was 0.25 times the mole of Li in n-butyllithium, and the number of moles of Li in the n-butyllithium initiator was 10 mmol. After polymerization, a cyclohexane solution (monomer concentration 22% by mass) containing 470 g of butadiene and 380 g of styrene was continuously added to the reactor at a constant rate over 60 minutes. After polymerization and assembly, a cyclohexane solution (monomer concentration 22% by mass) containing 75 g of styrene was added over 10 minutes to obtain a copolymer (D-1').

The styrene content in the obtained copolymer (D-1') was 53% by mass, the styrene polymer block content was 15% by mass, and the copolymer block (i.e., conjugated diene monomer unit and vinyl aromatic The styrene content in the copolymer block containing monomer units was 45% by mass, the butadiene content was 55% by mass, and the vinyl bond content was 23%.

The above hydrogenation catalyst was added to the obtained copolymer (D-1') in an amount of 100 ppm in terms of titanium per 100 parts by mass of the polymer, and a hydrogenation reaction was carried out at a hydrogen pressure of 0.7 MPa and a temperature of 75°C. To the obtained polymer solution, 0.3 parts by mass of octadecyl-3-(3,5-di-t-butyl-4-hydroxyphenyl) propionate was added as a stabilizer per 100 parts by mass of hydrogenated block copolymer. A hydrogenated block copolymer (D-1) was obtained.

The weight average molecular weight of the hydrogenated block copolymer (D-1) obtained was 160,000, and the weight average molecular weight of the hydrogenated block copolymer (D-1) was 160,000. The hydrogenation rate was 99%. Furthermore, one of the tan δ peaks obtained by viscoelasticity measurement was present at -15°C.

[Polyorganosiloxane (E)]
As the polyorganosiloxane (E-1), a master batch consisting of 50% by mass of dimethylsiloxane and 50% by mass of polypropylene (manufactured by DuPont-Toray Specialty Materials, trade name "MB50-001") was used.

[Organic peroxide (F)]
As the organic peroxide (F), a mixture of the following organic peroxide and the following crosslinking aid was used.
Organic peroxide: 100 parts by mass of 2,5-dimethyl-2,5-bis(t-butylperoxy)hexane (manufactured by NOF Corporation, trade name "Perhexa 25B") Crosslinking aid: divinylbenzene (manufactured by Wako Pure Chemical Industries, Ltd.) (hereinafter referred to as "DVB") 15 parts by mass

[Production Example 1] (Production of thermoplastic elastomer composition 1)
As the extruder, a twin-screw extruder (30 mmφ, L/D=74; manufactured by Kobe Steel, "KTX-30") having an oil inlet in the center of the barrel was used. A two-thread screw having kneading sections before and after the injection port was used as the screw. After mixing the raw materials other than the softener listed in Table 1 at the composition ratio (mass part ratio) shown in Table 1, the raw materials were introduced into a twin-screw extruder (cylinder temperature 200°C) using a quantitative feeder, and then the extruder Thermoplastic elastomer composition 1 was obtained by injecting the amount of softener shown in Table 1 with a pump through the injection port located in the center of the tube, and performing melt extrusion.

[Production Example 2] (Production of thermoplastic elastomer composition 2)
Thermoplastic elastomer composition 2 was obtained in the same manner as composition 1 except that the composition ratio (mass part ratio) of the raw materials was changed as shown in Table 1.

Properties Evaluation The properties of thermoplastic elastomer compositions 1 and 2 obtained in Production Examples 1 and 2 were measured by the following methods, respectively. The results are shown in Table 1.
[MFR (g/10 minutes)]
The melt flow rate of the thermoplastic elastomer composition was measured in accordance with JIS K7120 at 230° C. and a load of 1.2 kg.

[Shore A hardness measurement]
A press sheet with a thickness of 2 mm was produced from a thermoplastic elastomer composition, and a laminated sheet with a thickness of 6 mm obtained by stacking three of the press sheets was used as a measurement sample.
The measurement sample obtained above was measured using a Shore A hardness meter in accordance with JIS K6253. After bringing the pressure plate into contact with the test piece, the value read 10 seconds later was defined as Shore A hardness (10 second value).

[Tensile modulus]
(Tensile storage modulus of molded article) The tensile storage modulus of the molded article of the thermoplastic elastomer composition was measured as follows.
First, the storage modulus G' of the molded body was measured using a dynamic viscoelasticity tester under the conditions of deformation mode: torsion, frequency: 1 Hz, dynamic strain: 0.1%, and measurement temperature: 25 ° C. .
Next, since the Poisson's ratio of the elastomer material is generally 0.49, the tensile storage modulus of the elastomer material can be calculated to be three times the storage modulus G', so the storage modulus of the obtained molded body is The value of the tensile storage modulus of the molded body was obtained by multiplying the value of the modulus G' by three.

(Tensile modulus of base material layer)
The tensile modulus of the base material layer was measured under the following conditions.
Test standard: JIS K 7161-1, -2
Test environment: 23℃±2℃, 50%RH±10%RH
Test piece shape: JIS K 7161-2 1A type test piece Tensile speed: 30 mm/min.

[Example 1]
<Manufacture of injection molded body>
Using an injection molding machine, the thermoplastic elastomer composition 1 obtained in Production Example 1 was injection molded into a flat plate mold with skin texture processing under the conditions of a resin temperature of 220 ° C. and a mold temperature of 40 ° C., An injection molded article having a thickness of 1 mm and a surface average arithmetic roughness (Ra) of 2 μm was obtained as a molded article to be the surface layer of the laminate.

<Manufacture of laminate>
The injection molded product obtained above and the following base material layer 1 were bonded together with double-sided tape to obtain a laminate having the injection molded product as a surface layer.
Base layer 1: Made of TPU, semi-cylindrical, height 19 mm, width 50 mm, length 180 mm, tensile modulus 1500 MPa

Each property was measured or evaluated by the following method. The results are shown in Table 2.
(1) Arithmetic mean roughness Ra (μm)
The arithmetic mean roughness Ra of the molded article of the thermoplastic elastomer composition obtained above was measured by a surface roughness measuring device (surface roughness profile measuring device Surfcom 1400D, manufactured by Tokyo Seimitsu Co., Ltd.).
Note that the measurement conditions are as follows.
Contact: Spherical φ1.6mm
Specification load: 0.4gf
Measurement length: 40mm
Cutoff wavelength: 8mm
Measurement speed: 0.15mm

(2) Coefficient of dynamic friction The coefficient of dynamic friction of the molded article of the thermoplastic elastomer composition obtained above was measured using a tactile evaluation device (dynamic/static friction measuring device TL201Ts). Note that the measurement conditions are as follows.
Sliding speed: 100mm/sec
Load: 50gf
Sliding distance: 50mm

(3) Tactile evaluation (smooth feeling)
The tactile sensation when the surface of the molded article of the thermoplastic elastomer composition obtained above was rubbed with the pad of the index finger was evaluated according to the following criteria, with 2 points for good and 1 point for poor. The evaluation was done by three people, and the total score of the three people is shown in Table 2.
2 points: Good (I don't feel any resistance when sliding it with my finger.)
1 point: Poor (I feel resistance when sliding it with my finger.)

(4) Tactile evaluation (moist feeling)
The tactile sensation when the surface of the molded article of the thermoplastic elastomer composition obtained above was rubbed with the pad of the index finger was evaluated according to the following criteria, with 2 points for good and 1 point for poor. The evaluation was done by three people, and the total score of the three people is shown in Table 2.
2 points: Good (Feels soft when rubbed with fingers.)
1 point: Poor (Feels hard when rubbed with fingers.)

[Examples 2-4, Comparative Examples 1-2]
<Manufacture of injection molded body>
In the production of the injection molded article of Example 1, either thermoplastic elastomer composition 1 obtained in Production Example 1 or thermoplastic elastomer composition 2 obtained in Production Example 2 as shown in Table 2 was used as the thermoplastic elastomer composition. The average arithmetic roughness (Ra) of the surface was 2 μm, 6 μm, or 20 μm in the same manner except that one of three types of flat sheet molds with different grain shapes was used as the flat sheet mold. Molded bodies having the values shown in Table 2 were obtained.

<Manufacture of laminate>
Among the molded bodies obtained above, the molded bodies that satisfy the type of thermoplastic elastomer composition and average arithmetic roughness (Ra) of the surface shown in Table 2, and the molded bodies that satisfy the type of thermoplastic elastomer composition shown in Table 2 and the surface average arithmetic roughness (Ra) shown in Table 2 among the following base material layers 1 or 2. The material layers were bonded together using double-sided tape in the same manner as in Example 1 to obtain a laminate having the injection molded product as a surface layer. Each property was measured or evaluated in the same manner as in Example 1. Table 2 shows the results.
Base layer 1: Made of TPU, semi-cylindrical, height 19 mm, width 50 mm, length 180 mm, tensile modulus 1500 MPa
Base layer 2: Made of PP, rectangular parallelepiped, height 10 mm, width 50 mm, length 180 mm, tensile modulus 1300 MPa

The furniture laminate of the present invention can be suitably used as various furniture materials, particularly as surface materials for office chairs, household chairs, sofas, etc., and various members.

Claims (8)

A furniture laminate comprising a surface layer made of a molded body of a thermoplastic elastomer composition and a base layer,
A laminate for furniture, wherein the surface layer has an arithmetic mean roughness Ra of more than 0 and less than 20 μm. The furniture laminate according to claim 1, wherein the molded body has a lower tensile storage modulus than the base layer. The furniture laminate according to claim 1 or 2, wherein the surface layer has a thickness of 0.1 to 10 mm. The furniture laminate according to claim 1 or 2, wherein the base material layer contains at least one resin selected from the group consisting of urethane resin, polyolefin resin, and polyamide resin. The furniture laminate according to claim 1 or 2, wherein the base material layer has a curved surface. The furniture laminate according to claim 1 or 2, wherein the thermoplastic elastomer composition contains the following (A) to (C) in the following proportions.
(A) Propylene polymer: For 100 parts by mass,
(B) Ethylene/α-olefin copolymer containing ethylene and α-olefin units having 3 to 20 carbon atoms: range of 30 to 300 parts by mass,
(C) Softener: range of 30 to 280 parts by mass. The furniture laminate according to claim 6, wherein the thermoplastic elastomer composition further contains the following (D) in the following proportions based on 100 parts by mass of the (A).
(D) Hydrogenated block copolymer having at least one block each consisting mainly of conjugated diene monomer units and one block mainly consisting of vinyl aromatic monomer units: 50 to 400 mass Department range. The furniture laminate according to claim 1 or 2, which is used for a chair.