JP2009166407A - Skin material for interior decoration - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a skin material for interior decoration excellent in any of oil resistance, abrasion resistance, forming shape following characteristics, flexibility and mat-finish property. <P>SOLUTION: This skin material for interior decoration is obtained by sequentially laminating a copolyester layer (B) and a top coat layer (C) on at least one surface of a support substrate (A), where the copolyester layer (B) comprises a polyester composed mainly of a copolyester (B) whose elastic modulus under 23°C atmosphere is in a range of 10-1,000 MPa, and the surface gloss of the top coat layer (C) is 50% or lower. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an interior skin material excellent in oil resistance, flexibility, moldability, wear resistance, and matte properties.

  Conventionally, soft polyvinyl chloride resin and polyurethane resin have been used as materials for synthetic leather used for housing furniture such as reception sets, and car interior materials such as automobiles and trains. Have been preferably used. A layered product obtained by laminating these resin sheets and fabrics such as woven fabrics, knitted fabrics, and non-woven fabrics is widely used as a surface material that has been colored or coated, or a surface material that has been subjected to textured irregularities ( For example, see Patent Document 1). Skin materials typified by synthetic leather have a touch (flexibility) similar to that of leather and, at the time of molding, conform to various shapes, conformable to the shape, and have high elongation properties that do not easily break even after aging. A lot of proposals have been made (for example, see Patent Documents 2 to 4).

  However, when a soft polyvinyl chloride resin is used, it contains a large amount of plasticizer and imparts flexibility, so that the plasticizer bleeds out to the surface of the skin material, so that the feeling of touch with time and There was a problem such as adhesion of dust. In recent years, there has been a problem of generation of harmful gases when combusted, and new materials have been demanded due to recent environmental needs. In the case of using polyurethane, although it is a material containing no chlorine and there is no bleed out of the plasticizer and change with time, it is inferior in terms of flexibility.

  Moreover, in order to solve the said request | requirement, the alternative material by flexible polyester is proposed (for example, refer patent document 5). However, when used for an interior skin material such as a vehicle seat, the wear resistance and matte properties are not taken into consideration.

  Furthermore, an alternative material using a polyolefin-based resin has been proposed (see, for example, Patent Document 6). However, the polyolefin resin is too soft and has poor wear resistance. In addition, fat (oil) contained in the sweat of human hands permeates the interior skin material, leaving traces of fat (oil) easily remaining on it, and dust (such as dust) being difficult to clean. Oil), that is, oil resistance was poor.

Therefore, an interior skin material that satisfies all of oil resistance, flexibility, shape followability, wear resistance, and matteness with a material containing no chlorine is desired.
Japanese Patent Laid-Open No. 06-116875 JP 05-116261 A Japanese Patent Laid-Open No. 09-111671 Japanese Patent Laid-Open No. 10-251978 Japanese Patent No. 3128850 Japanese Unexamined Patent Publication No. 2000-6334

  An object of the present invention is to provide an interior skin material excellent in oil resistance, flexibility, shape followability, wear resistance, and matte properties.

As a result of intensive studies to achieve the above object, the present inventors adopt the following means. That is,
1) An interior skin material in which a copolymerized polyester layer (B) and a topcoat layer (C) are sequentially laminated on at least one surface of a supporting substrate (A),
The copolymer polyester layer (B) is a polyester mainly composed of a copolymer polyester (B) having an elastic modulus in a range of 10 to 1000 MPa at 23 ° C.,
An interior skin material, wherein the surface gloss of the topcoat layer (C) is 50% or less.
2) The interior skin material according to 1), wherein the topcoat layer (C) is made of a polyurethane resin or an acrylic resin containing 2 to 20% by weight of an inorganic filler.
3) The interior covering material according to 1) or 2) above, wherein the copolyester layer (B) is a foam copolyester layer (B) foamed at a foaming ratio of 1.1 to 4 times. .
4) The interior skin material according to any one of 1) to 3), wherein the copolymerized polyester layer (B) satisfies the following requirements (1) and (2).
(1) It is composed of a copolymerized polyester containing 60 to 95 mol% of an aromatic dicarboxylic acid component and 5 to 40 mol% of an aliphatic dicarboxylic acid component with respect to 100 mol% of the dicarboxylic acid component, (2 ) Containing at least one glycol component having 10 or less carbon atoms as a glycol component.
5) The dimer content in the aliphatic dicarboxylic acid component is 70 to 90% by weight, and the trimer content is 10 to 30% by weight. The skin material for interiors described in 1.
6) The interior skin material according to any one of 1) to 5) above, wherein the aliphatic dicarboxylic acid component is a dimer acid or a dimer acid derivative.
7) The interior skin material according to any one of 1) to 6) above, wherein a pigment or a dye is contained in the copolymerized polyester layer (B) and / or the topcoat layer (C).
8) The interior according to any one of 1) to 7) above, wherein the surface of the copolyester layer (B) and / or the topcoat layer (C) is subjected to a texture or embossing. Skin material.
9) The interior covering skin according to any one of 1) to 8) above, wherein the supporting substrate (A) is composed of a supporting substrate of any one of a woven fabric, a knitted fabric, a nonwoven fabric, and a foamed sheet. Wood.

  According to the present invention, an interior skin material excellent in oil resistance, flexibility, shape followability, wear resistance, and matte properties can be obtained.

  More specifically, the interior skin material of the present invention has an oil resistance by laminating a polyester layer (B) containing a copolymerized polyester (B) as a main component on at least one side of the support substrate (A). By laminating a topcoat layer (C) that is excellent in flexibility, shape followability, and embrittlement with time, and containing an inorganic filler, it is possible to obtain an interior skin material that is excellent in wear resistance and matting properties. .

  The skin material for interior use of the present invention is excellent in oil resistance, flexibility, molding followability, wear resistance, and matteness, and is therefore preferably used as a skin material for vehicle interiors such as automobiles and trains, and a skin material for house interiors. It is done.

  The interior skin material of the present invention is a copolymer comprising a copolymerized polyester (B) as a main component on at least one side of the support substrate (A) from the viewpoint of oil resistance, flexibility, molding followability, and embrittlement with time. It is important to laminate the polyester layer (B).

  The support base material (A) in the interior skin material of the present invention has flexibility because it does not impair the flexibility of the copolymerized polyester layer (B) containing the copolymerized polyester (B) as a main component. The supporting substrate (A) is preferable, and any one of a woven fabric, a knitted fabric, a nonwoven fabric, and a foamed sheet is preferable.

  Examples of the woven fabric include yarns made by twisting or untwisting fibers and then using warps and wefts, and having a structure such as plain weave, oblique weaving, satin weaving, etc. is there.

  Examples of the knitted fabric include knitted fabric such as flat knitting and warp knitting.

  Moreover, as said nonwoven fabric, what made the nonwoven fabric by adhere | attaching or intertwining the piled fibers by a heat | fever, a mechanical or chemical effect | action etc. is mentioned.

  Examples of the foam sheet include foams produced by methods such as extrusion foaming, bead foaming, and chemical foaming. From the viewpoint of productivity, an extruded foam sheet is preferably used.

  Of the woven fabric, knitted fabric, non-woven fabric and foamed sheet, a supporting substrate having flexibility is preferable. The material of the woven fabric, knitted fabric, non-woven fabric and foamed sheet constituting the supporting substrate (A) is not particularly limited, but for the woven knitted fabric and non-woven fabric and fiber, silk, wool, cotton, hemp, nylon, polyester, polyolefin, etc. Can be mentioned. Examples of the foam sheet include polyolefins such as polystyrene, polyester, polyethylene, and polypropylene. Among the woven fabrics, knitted fabrics, nonwoven fabrics and foamed sheets constituting the supporting substrate (A), the foamed sheet is preferable in that it is easy to obtain a leather touch. More preferably, a foamed polyolefin sheet is preferred. More preferably, foamed polypropylene is preferable in terms of heat resistance.

  The support base material (A) in the interior skin material of the present invention is a support base material (from the viewpoint of improving the adhesiveness before providing the copolymer polyester layer (B) containing the copolymer polyester (B) as a main component). A) A method for surface treatment such as corona discharge treatment, a method for coating an easy-adhesion layer such as a hot melt adhesive, an anchor coating agent, etc., and a surface of the supporting substrate (A) by friction or polishing. After providing an easy-adhesion layer by a roughening method, a copolymerized polyester layer (B) containing the copolymerized polyester (B) as a main component can be provided. These methods can be used in combination.

  When the surface treatment is performed, the wetting index is preferably 45 mN / m or more according to the method of JIS K6782. More preferably, a corona discharge treatment is preferably performed.

  When coating is performed, the type, coating method, and thickness of the coating compound are not particularly limited as long as the effects of the present invention are not impaired.

  When the supporting substrate (A) is a woven fabric, a knitted fabric or a non-woven fabric, it is preferable to open, uneven or fibrillate the fibers constituting the vicinity of the surface to the extent that the supporting substrate is not damaged. There are no limitations on the method of opening the fiber, making it uneven or fibrillating, but it is preferable to rub and polish the fiber surface, pierce it with a needle or a needle with barb, needle punching, water jet punching, sandblasting, or the like. As a material to be rubbed or polished, it is preferable to use a sandpaper, a sword, a grindstone or other rough surface, but even if it has a smooth surface such as cork or rubber, If fibrillation occurs, it may be rubbed. In the case of repeated piercing with a needle or a needle with a barb, it is preferable to use a needle provided with a large number of needles such as Kenzan or a bundle of needles because it is efficient.

  Moreover, when a support base material (A) is a foaming olefin sheet, it is preferable to provide an easily bonding layer after performing surface treatments, such as a corona discharge treatment.

  The copolymer polyester (B) used for the copolymer polyester layer (B) in the interior skin material of the present invention is basically composed of an aromatic dicarboxylic acid component and an aliphatic dicarboxylic acid component of a dicarboxylic acid component, and a glycol component. It is preferable that the polymer is constituted. More specifically, as a dicarboxylic acid component, a hard segment having an aromatic dicarboxylic acid component as a main constituent, a soft segment having a fatty acid dicarboxylic acid component as a main constituent, and a glycol having 10 or less carbon atoms as a glycol component It is preferable that at least one component is contained.

  In the copolymerized polyester (B), the aromatic dicarboxylic acid component constituting the hard segment is, for example, terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, diphenyldicarboxylic acid, diphenylsulfonedicarboxylic acid, diphenoxyethanedicarboxylic acid, 5- Examples thereof include sodium sulfoisophthalic acid and phthalic acid. Of the aromatic dicarboxylic acid components, terephthalic acid, isophthalic acid, and naphthalenedicarboxylic acid are more preferable. As for content of aromatic dicarboxylic acid in 100 mol% of all the dicarboxylic acids of copolyester (B), 60-95 mol% is preferable. More preferably, it is 65-93 mol%, Most preferably, it is 70-90 mol%.

  In the copolymerized polyester (B), the aliphatic dicarboxylic acid component constituting the soft segment is preferably a derivative obtained from an unsaturated fatty acid having a carbon number of 10 to 30 represented by the following formula. It is obtained mainly from a dimerized fatty acid (hereinafter abbreviated as a dimer) obtained by dimerization of an unsaturated fatty acid or an ester-forming derivative of the dimer.

_{CH 3 (CH 2) m (} CH = CH-CH 2) k (CH 2) n COOR
(In the formula, R is a hydrogen atom or an alkyl group, m is an integer of 1 to 25, k is an integer of 1 to 5, n is an integer of 0 to 25, and m, k, and n are 8 ≦ m + 3k + n ≦ 28. Satisfies the relational expression.)
In the dimerization reaction of the unsaturated fatty acid, a trimerized fatty acid (hereinafter abbreviated as trimer) obtained by trimerization of the unsaturated fatty acid is also generated together with the dimer. Therefore, the aliphatic dicarboxylic acid derivative obtained by the dimerization reaction of the unsaturated fatty acid contains a dimer, a trimerized trimer and an unreacted monomer.

  This aliphatic dicarboxylic acid derivative is purified by multiple distillations, etc., and when a high-purity aliphatic dicarboxylic acid derivative having a dimer amount of 95% or more, further 98% or more is used, a good copolymer in terms of color tone Polyester is obtained. However, since the cost of the aliphatic dicarboxylic acid derivative is significantly increased by the distillation process, in order to achieve both the color tone and cost of the aliphatic dicarboxylic acid copolymer polyester, the dimer, trimer in the aliphatic dicarboxylic acid derivative The body ratio is preferably 70 to 90% by weight and 10 to 30% by weight, respectively. That is, in the aliphatic dicarboxylic acid copolyester, the dimer content in the aliphatic dicarboxylic acid derivative is preferably 70 to 90% by weight, and the trimer content is preferably 10 to 30% by weight.

  In addition, the aliphatic dicarboxylic acid derivative used in the production of the copolyester (B) copolymerized with an aliphatic dicarboxylic acid has an unsaturated bond that is generated by a dimerization reaction of an unsaturated fatty acid. May be used as a polymerization raw material as it is or after reduction by a hydrogenation reaction. However, particularly when heat resistance, weather resistance and transparency are required, it is preferable to use a dimer in which unsaturated bonds are eliminated by hydrogenation.

  Examples of dimers of unsaturated fatty acids that are aliphatic dicarboxylic acid derivatives that can be used in the production of a copolymerized polyester (B) obtained by copolymerizing an aliphatic dicarboxylic acid include dimer acids and dimers that are dimers having 36 carbon atoms. A dimer acid derivative obtained by esterifying an acid is preferred.

  The dimer acid is obtained by dimerizing an unsaturated fatty acid having 18 carbon atoms such as linoleic acid and linolenic acid. For example, “Pripol” from Unikema International, or various esters thereof. Forming derivatives are commercially available. One or more of the above compounds may be used in combination.

  The amount of the aliphatic dicarboxylic acid component in the copolymerized polyester (B) obtained by copolymerizing the aliphatic dicarboxylic acid of the present invention is preferably 5 to 40 mol% in the total 100 mol% component, more preferably 5 to 5 mol%. 35%, more preferably 5 to 30 mol%.

  If the amount of the aliphatic dicarboxylic acid component in the copolymerized polyester (B) exceeds 40 mol% in the total dicarboxylic acid component, the flexibility is excellent, but the productivity such as deterioration of the polymer cutability is lowered, which is not preferable. .

  Conversely, when the amount of the aliphatic dicarboxylic acid component in the copolyester is less than 5 mol% in the total dicarboxylic acid component, the flexibility deteriorates, which is not preferable.

  The copolymer polyester (B) in the present invention preferably contains at least one glycol component having 10 or less carbon atoms as a glycol component.

  Specific examples of the glycol component having 10 or less carbon atoms include ethylene glycol, 1,3-propanediol, 1,2-propanediol, 2-methyl-1,3-propanediol, and 1,3-butanediol. 1,4-butanediol, 1,2-butanediol, 1,5-pentylglycol, 2,2-dimethyl-1,3-propanediol, 2-ethyl-1,3-propanediol, 1,6- Hexanediol, 2-methyl-2-ethyl-1,3-propanediol, 1,8-octanediol, 1,10-decanediol, 1,3-cyclobutanediol, 1,3-cyclobutanedimethanol, 1,3 -Cyclopentanedimethanol, 1,4-cyclohexanedimethanol, etc. are mentioned.

  Among these, at least one selected from ethylene glycol, 1,3-propanediol, and 1,4-butanediol is preferable. 1,4-butanediol is an essential component, and ethylene glycol and 1,3 -More preferably, one or more of the propanediols are selected. The reason why it is preferable to select a multi-component glycol is that when there is only one glycol component, it is difficult to control the crystallinity, and the crystallinity is obtained by copolymerizing a plurality of glycol components and changing the blending amount. It is because it becomes possible to control. More preferably, the proportion of the glycol component containing one or more selected above is 80 mol% or more, more preferably 90 mol% or more, so that moldability, control of crystallinity, productivity, and cost are reduced. It is preferable from the point.

  Specific polymers used as the copolyester (B) in the present invention include, among dicarboxylic acid components, aliphatic dicarboxylic acid components as essential components, aromatic dicarboxylic acid components isophthalic acid, terephthalic acid, glycol components A copolymer of ethylene glycol, 1,3-propanediol and 1,4-butanediol, for example, isophthalic acid-terephthalic acid-dimer acid-ethylene-butylene copolymer, isophthalic acid-terephthalic acid-dimer Examples include acid-butylene copolymers, terephthalic acid-dimer acid-butylene copolymers, and terephthalic acid-dimer acid-propylene copolymers.

  Here, the copolymer polyester (B) of the present invention may be mixed with a polymer composed of other components as long as the effects of the present invention are not impaired.

  The copolymer polyester layer (B) in the present invention is preferably a polyester containing 80% by weight or more and 100% by weight or less of the copolymer polyester (B). That is, the copolyester layer (B) is a polyester having the copolyester (B) as a main component. If the copolymerized polyester (B) in 100% by weight of the polyester constituting the copolymerized polyester layer (B) is less than 80% by weight, the flexibility tends to be inferior. The copolymerized polyester (B) in 100% by weight of the polyester constituting the copolymerized polyester layer (B) is more preferably 90% by weight or more, and still more preferably 95% by weight or more.

  In addition, the copolymer polyester (B), which is the main component of the polyester constituting the copolymer polyester layer (B) in the present invention, has an elastic modulus in an atmosphere at 23 ° C. from the viewpoint of the flexibility of the interior skin material. It is important to be in the range of 10 to 1000 MPa. If the elastic modulus in an atmosphere at 23 ° C. exceeds 1000 MPa, the flexibility of the skin material for interior materials tends to be inferior, which is not preferable. On the other hand, if the elastic modulus under an atmosphere of 23 ° C. is less than 10 MPa, productivity and handling properties such as polymer cutting properties are deteriorated. More preferably, it is the range of 10-800 MPa, More preferably, it is the range of 10-500 MPa.

  In order to make the elastic modulus in an atmosphere at 23 ° C. in the range of 10 to 1000 MPa, the copolymerization amount of the dimer acid component of the soft segment component of the dicarboxylic acid component of the copolymer polyester (B) is 10 mol% or more, The glycol component is at least one selected from ethylene glycol, 1,3-propanediol, and 1,4-butanediol, preferably, 1,4-butanediol is an essential component, and ethylene glycol and 1,3-butanediol are essential components. It is preferable to select one or more of propanediol. More preferably, it can be achieved when the proportion of the glycol component containing one or more selected is 80 mol% or more, more preferably 90 mol% or more. The upper limit of the dimer acid component is 40 mol% from the viewpoint of polymer productivity.

  Furthermore, the copolymer polyester (B) in the present invention preferably has a glass transition temperature Tg in the range of −30 to 0 ° C. from the viewpoint of the flexibility and embrittlement with time of the interior skin material. If the glass transition temperature Tg exceeds 0 ° C., the flexibility and the embrittlement with time are likely to be inferior. Conversely, if the glass transition temperature Tg is less than −30 ° C., productivity and handleability such as polymer cutting properties are deteriorated, which is not preferable. More preferably, it is the range of -30-10 degreeC.

In order to set the glass transition temperature Tg within the above range, the copolymerization amount of the dimer acid component of the soft segment component of the dicarboxylic acid component of the copolymerized polyester (B) is 10 mol% or more, the glycol component is ethylene glycol, 1, 3 -At least one selected from propanediol and 1,4-butanediol, preferably 1,4-butanediol as an essential component, and at least one selected from ethylene glycol and 1,3-propanediol It is preferable to do. More preferably, it can be achieved when the proportion of the glycol component containing one or more selected is 80 mol% or more, more preferably 90 mol% or more. The upper limit of the dimer acid component is 40 mol% from the viewpoint of polymer productivity.
The interior skin material of the present invention is preferably subjected to a texture or embossing on the surface of the copolyester layer (B) and / or the surface of the topcoat layer (C). Examples of the embossing or embossing method include a method using an embossed pattern or a textured metal roll, and a method using an embossed or embossed or textured release paper made of polyolefin or the like. From the viewpoint of cost, a method using a release paper with embossing or embossing is preferred. The material of the embossed pattern and the embossed pattern on the release paper is preferably polymethylpentene from the viewpoint of heat resistance and durability. In addition, the texture processing is preferable because a leather-like hand feeling is easily obtained.

  Examples of the embossing method include a hot needle method through a perforator (perforator), a method through a stamping roll, a method through a chilled roll, and a method of embossing immediately after melt extrusion. The embossed pattern of the roll is transferred to the surface of the copolymerized polyester layer (B) and / or the topcoat layer (C) by passing the laminate between the metal roll containing paper and the paper or rubber roll and applying pressure. It is preferable to obtain. The embossed pattern can be selected from various patterns such as a random mat, a square, a diamond type, a deep drawing type, and a grain pattern.

  Moreover, when melt-extruding into a sheet by the T-die method, a cooling drum having a concavo-convex surface is used, and the surface concavo-convex pattern is pressed between the cooling drum and the nip roll to form the surface of the copolymer polyester layer (B) It may also be a method of transferring to the surface of the topcoat layer (C).

  Further, as other processing methods for embossing, hairline processing, satin processing, sandblasting, and the like can be mentioned, but embossing is preferable in order to obtain an excellent design with a deep depth. Also, before embossing, hairline processing, satin processing, sandblasting, etc. may be performed in advance.

  Thus, it is preferable that the average uneven | corrugated depth of the surface obtained by embossing is the range of 0.02-2.0 mm. If it is less than the range, it is difficult to obtain design properties, which is not preferable. On the other hand, if the range is exceeded, the average uneven depth is too deep, and tearing may occur during molding, which is not preferable.

  The copolymerized polyester layer (B) in the interior skin material of the present invention is a foamed copolymerized polyester layer (B) foamed at a foaming ratio of 1.1 to 4 times from the viewpoint of flexibility of the interior skin material. It is preferable. An expansion ratio of less than 1.1 is not preferable because the flexibility of the skin material is difficult to obtain. On the other hand, if the expansion ratio exceeds 4, it is not preferable because it is too soft as an interior skin material and the voids are easily crushed. Preferably it is 1.2 to 3 times, and more preferably 1.3 to 2.5 times.

  Examples of the foaming method include a chemical method of foaming by adding a foaming agent and decomposing and gasifying the foaming agent, and a physical method of foaming by enclosing a liquid or gas, but either method may be used.

  As the foaming agent in the chemical method, for example, ordinary foaming agents such as azodicarbonamide, dinitrosopentamethylenetetramine, p, p'-oxybisbenzenesulfonylhydrazide, sodium hydrogen carbonate, hydrazodicarbonamide are preferably used. . The amount of foaming agent added a is said to have the following relational expression with the target foaming ratio b, the amount of gas generated c of the foaming agent, and the density d of the material, and the amount of foaming agent added is determined from the target foaming ratio. Can be sought.

Addition amount of foaming agent a (% by weight) = {(b-1) / (c × d)} × 100 (formula)
Here, a: addition amount (% by weight) of foaming agent, b: target foaming ratio (−), c: density of material (g / cm ³ ), d: gas generation amount of foaming agent (ml / g) It is.

  As a method of enclosing liquids and gases in the physical method, water, carbon dioxide, nitrogen, etc. are used as liquefied substances in a supercritical state, and the supercritical liquefaction is placed in the cylinder portion of the extruder equipped with the liquefied substance enclosing device. Examples of the method include enclosing a product and extruding and foaming while cooling from a connected base. In order to obtain the target expansion ratio, it can be achieved by controlling the amount of encapsulation and controlling the melt viscosity. As the liquefied material to be enclosed, carbon dioxide is preferable from the viewpoint of easily obtaining a liquefied material in a supercritical state, easily controlling the amount of gasification, and handling.

  In the interior skin material of the present invention, the topcoat layer (C) can be laminated on the copolymer polyester layer (B) containing the copolymer polyester (B) as a main component from the viewpoint of weather resistance and wear resistance. preferable. As the top coat layer (C), a polyurethane resin or an acrylic resin is preferable.

As the polyurethane resin used for the topcoat layer (C) of the present invention, a resin consisting only of a urethane bond or a resin consisting of a urethane bond and a urea bond is preferably used. Urethane resin is a compound having a urethane bond repeatedly in the composition, such as a polyisocyanate compound having two or more isocyanate groups, a polyol compound having two or more hydroxyl groups, polyamine, active hydrogen such as water, for example, It can be obtained by reacting with a compound having (—NH ₂ , —NH, —CONH—, etc.).

  A substance containing a urethane bond is usually synthesized by reacting a corresponding isocyanate component and an alcohol component. R-N = C = O + R'OH → R-NHC (= O) OR 'When a dicarbonate or chloroformate is allowed to act on an amine, it is changed to urethane. Since the urethane can be easily decomposed with an acid or the like and returned to the original amine, this reaction is used for protecting the amino group.

  Examples of the alcohol component in the urethane bond include known polyhydric alcohols such as diethylene glycol, triethylene glycol, 1,5-pentanediol, 1,6-hexanediol, dimethyl-1,5-pentanediol, and dimethyl-1,6. -Hexanediol, 1,8-octanediol, cyclohexane-1,4-diol, cyclohexane-1,4-dimethanol and the like.

  Examples of the isocyanate component in the urethane bond include aromatic diisocyanates such as phenylene diisocyanate, tolylene diisocyanate, diphenylmethane diisocyanate, and tphthalene diisocyanate, hexamethylene diisocyanate, lysine diisocyanate, cyclohexane diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, and xylidine diisocyanate. And aliphatic diisocyanates such as tetramethylxylylene isocyanate.

  Examples of the acrylic resin used for the top coat layer (C) of the present invention include acrylic acid ester or methacrylic acid ester polymers. As the acrylic acid monomer, an acrylic resin whose weather resistance, abrasion resistance and the like are modified by copolymerization with other monomers is preferably used. From the viewpoint of improving the wear resistance, an acrylic resin containing silicon or fluorine in the molecular chain is preferably used.

  In the interior skin material of the present invention, it is important that the surface glossiness of the topcoat layer (C) is 50% or less from the viewpoint that high-quality matte properties can be obtained. More preferably, it is 40% or less, More preferably, it is 30% or less. When the surface glossiness exceeds 50%, it is not preferable because the matte property with a high-class feeling is lost. Further, since the surface of the topcoat layer (C) functions as a matte layer, the surface gloss is preferably 50% or less, the lower the better, but in practice it is difficult to make it 2% or less. . In order to set the surface glossiness of the topcoat layer (C) to 50% or less, the inorganic filler having a specific type and a specific size described below is contained in an amount of 2 to 20% by weight or the topcoat layer (C). The surface can be processed by embossing or the like so that the average unevenness depth is preferably in the range of 0.02 to 2.0 mm.

  The top coat layer (C) in the interior covering material of the present invention preferably contains an inorganic filler from the standpoint that high-quality matte properties can be obtained. Examples of inorganic fillers include calcium carbonate, magnesium carbonate, barium sulfate, silica, talc, clay, kaolin, sericite, glass flakes, mica, clay minerals such as smectite and vermiculite, of which talc, silica and mica. Is preferable from the viewpoint of mixing with the topcoat layer (C). These inorganic fillers may be used alone or in combination of two or more. In addition, these inorganic fillers can be used as they are, or those subjected to a surface treatment with a surfactant, a silane coupling agent or the like can be used as necessary. The average particle diameter of the inorganic filler is preferably 10 μm or less, more preferably 5 μm or less, and particularly preferably 4 μm or less from the viewpoint of easily obtaining matte properties. Although a lower limit is not specifically limited, From the point of cost, it is about 0.1 micrometer. In addition, the inorganic filler is preferably contained in the topcoat layer (C) in the range of 2 to 20% by weight after the topcoat layer (C) is cured or dried, from the point that matte properties are easily obtained. If it exceeds 20% by weight, the productivity tends to be inferior, and cracking may occur when the skin material is bent. On the other hand, if it is less than 2% by weight, the glossiness is increased, and matte properties cannot be obtained. More preferably, it is in the range of 5 to 15% by weight, and still more preferably in the range of 5 to 10% by weight.

  The thickness of the topcoat layer (C) of the present invention is preferably thicker from the viewpoint of weather resistance and wear resistance, but is not preferred because flexibility tends to be inferior. The thickness of the top coat layer (C) is preferably in the range of 0.1 to 10 μm.

  The polyurethane resin and acrylic resin preferably used for the topcoat layer (C) of the present invention have a breaking elongation from the point of molding followability to the polyester layer (B) containing the copolyester (B) as a main component. A range of 100 to 1000% is preferable. If the breaking elongation is less than 100%, the shape may not be followed. On the other hand, if it exceeds 1000%, sufficient wear resistance may not be obtained. More preferably, it is 200 to 500% of range.

  The copolyester layer (B) and / or the topcoat layer (C) in the interior skin material of the present invention preferably contains a pigment or a dye. The pigment or dye is preferably contained in both the polyester layer (B) and the topcoat layer (C) from the viewpoint that the color depth is easily obtained, but may be contained in either one.

  Inorganic pigments include titanium oxide, calcium carbonate, barium sulfate, aluminum oxide, silicon dioxide, iron oxide, chromium oxide, zinc white, lead white, bengara, cadmium red, yellow lead, cobalt blue, cobalt purple, zinc chromate, and Carbon black or the like is used. Bengala and carbon black are preferred for the purpose of coloring the leather. These inorganic pigments may be surface-treated with oxides such as aluminum, silicon and zinc in order to improve dispersibility in the copolyester and weather resistance of the interior skin material.

  Organic pigments include condensed azo, isoindolinone, perinone, quinacridone, diketopyrrolopyrrole, anthraquinone, dioxazine, benzimidazolone, copper phthalocyanine (β), metal complex azo, chlorinated copper phthalocyanine (α), Allylamide, azo (Ca), diarylide AA, diarylide MX, diarylide HR, pyrazolone naphthol red, BON allylamide, 2B toner (Ca), 4B toner (Ca), copper phthalocyanine (α), copper halide phthalocyanine, naphthol, Dioxazine, naphthol AS, diarylide OT, pyrazolone, lake red C (Ba), BON allylamide, and the like can be used.

  Furthermore, as the dye, chromium complex, cobalt complex, phthalocyanine, methine, anthraquinone, and the like are used. Two or more of these colorants may be contained. For example, for the purpose of coloring the woody material, it is preferable to use anthraquinone, quinacridone, benzimidazolone, and diketopyrrolopyrrole.

  In the interior skin material of the present invention, when a colorant such as a pigment or dye is contained in the copolymerized polyester (B), it may be added during the polymerization reaction of the copolymerized polyester (B). A method of kneading and dispersing the colorant using a shaft extruder to form a master pellet, blending a predetermined amount thereof, and incorporating it into the copolyester can be employed.

  As a method of adjusting the content of colorants such as pigments and dyes, a master material containing a colorant at a high concentration is prepared by the above method, and the master material is diluted with a material that does not substantially contain a colorant. Thus, a method of adjusting the content of the colorant is effective. The colorant may be subjected to treatments such as pulverization, dispersion, classification, and filtration in advance as necessary.

  The average particle diameter of the colorant is preferably 0.01 to 0.5 μm, more preferably 0.01 to 0.3 μm. When the average particle diameter exceeds 0.5 μm, the film surface becomes too rough, and printing may be difficult, and film defects are likely to occur, which is not preferable.

  The content of the colorant such as pigment or dye is preferably 0.1 to 50% by weight, more preferably 1 to 100% by weight of the copolyester layer (B) or 100% by weight of the topcoat layer (C). It is good to contain ~ 20% by weight. When the content is less than 0.1% by weight, the entire film is easily seen through and coloring is difficult to appear. Conversely, if it exceeds 50% by weight, the colorant tends to aggregate and color spots are likely to occur, which is not preferable. When an organic pigment or dye is used as the colorant, the content thereof is preferably 10% by weight or less, more preferably 7% by weight or less, and particularly preferably 3% by weight or less. If it exceeds 10% by weight, the color tone is liable to change due to reduction of the colorant due to thermal decomposition, thermal deterioration, sublimation, etc. in the drying or melt extrusion process, which is not preferable.

  In addition, the support substrate (A), the copolymerized polyester layer (B), and the top coat layer (C) are within the range that does not impair the present invention, and other than the colorant as long as the effects of the present invention are not impaired. Various additives such as an end-blocking agent, a crosslinking agent, an antioxidant, a heat stabilizer, an antistatic agent, a conductive agent, an ultraviolet absorber, a flame retardant, and the like may be added. Examples of the end-capping agent include carbodiimide compounds, epoxy compounds, and isocyanate compounds. Among them, aromatic carbodiimide compounds have a high end-capping effect and can provide excellent stability over time. As the antioxidant, phosphorus compounds such as phosphates are used. As the ultraviolet absorber, inorganic particles such as benzotriazole compounds, zinc oxide, titanium oxide, and iron oxide are used.

  The copolyester layer (B) containing the copolyester (B) as a main component in the present invention is subjected to surface treatment such as corona discharge treatment on the copolyester layer (B) surface before providing the topcoat layer (C). The top coat layer (C) can be laminated by applying an easy adhesion layer such as an anchor coating agent. When coating is performed, the type, coating method, and thickness of the coating compound are not particularly limited as long as the effects of the present invention are not impaired.

  The thickness of the polyester layer (B) containing the copolyester (B) as a main component can be freely selected according to the intended use. The thickness is usually in the range of 20 to 1000 μm, preferably from 30 to 500 μm, more preferably in the range of 50 to 400 μm, from the viewpoint of the flexibility of the interior skin material.

  Next, although the manufacturing method of the skin material for interiors of this invention is demonstrated, this invention is not limited to this.

  First, the method of laminating the support base material (A) and the copolyester layer (B) comprising the copolyester (B) as a main component is a method of applying an adhesive, bonding and laminating, or heating. Examples thereof include a method of heat bonding and a method of melt-extruding the copolymer polyester (B) containing the copolymer polyester (B) as a main component and laminating the support substrate (A) by extrusion lamination. Specifically, when the copolyester (B) melted from the extruder die is cast on a cooling roll using the T-die method, the support substrate (A) is sandwiched and laminated at the same time, or polyester (B ) Is melted and laminated on the support substrate (A) by extrusion lamination using the T-die method. Moreover, the method of manufacturing the film of copolyester (B) previously, pinching | interposing into the roll which gave the film and the support base material (A), etc., and thermocompression-bonding is mentioned. Preferably, from the viewpoint of productivity, it is preferable to laminate the copolymerized polyester (B) on the support substrate (A) by an extrusion laminating method.

  In the manufacturing method of the interior skin material, when the copolymerized polyester (B) is used as a film or an extrusion laminate, the manufacturing method will be described. For example, a mixture of the copolyester (B) and the colorant master is dried as necessary, and then supplied to a known melt extruder. The melt extruder may be a single screw melt extruder or a biaxial melt extruder provided with a vent port. The supplied resin is melted at a temperature of the melting point of polyester + 20-30 ° C. and then passed through a leaf disk filter having a filtration accuracy of 20-40 μm.

  Next, when the copolymerized polyester layer (B) is a film, it is led to a slit-shaped T die die and extruded into a sheet shape. Adhering to a casting drum adjusted to a surface temperature of 10 to 30 ° C. by a method of electrostatic application using a needle-like edge pinning device at both ends of the extruded sheet, a method of an air nozzle, an air chamber, a suction chamber, etc. The film of the copolyester (B) can be obtained by cooling and solidifying from the molten state. The casting drum may be a mirror drum or a satin drum, but a satin drum is preferred from the viewpoint of adhesion of the film to the drum and adhesiveness. From the viewpoint of achieving both adhesiveness and adhesiveness, the surface roughness of the satin drum is preferably in the range of 100 to 1000 nm in terms of the centerline surface roughness Ra. More preferably, it is the range of 200-500 nm. When a satin drum is used, the adhesion to the drum tends to be insufficient, and a film with poor transparency may be obtained. Therefore, it is preferable to use another adhesion method in combination.

  When the film of the copolymerized polyester (B) has high adhesion to the casting drum, prepare two melt extruders, supply the copolymerized polyester (B) to one, and supply ethylene propylene to one melt extruder. A film is produced in the same manner as described above except that a polyolefin resin such as a polymer is supplied and cast using a two-layer pinole tube so that the polyolefin resin layer is disposed on the casting drum surface. After production, the polyolefin resin layer can be peeled off to obtain a copolymerized polyester (B) film. In this case, since the polyolefin resin layer is on the casting drum surface side, since adhesion to the casting drum can be reduced, from the viewpoint of adhesion, the casting drum is preferably a mirror drum rather than a satin drum, and the adhesion method is A whole surface electrostatic application method is preferred.

  As a method of laminating the copolymer polyester (B) film obtained above on the support substrate (A) and embossing or embossing the copolymer polyester (B) surface, the copolymer polyester layer (B) is extruded. In the case of laminating, the molten polymer that has passed through the filter is guided to a slit-shaped T die die, extruded and laminated into a sheet on the support substrate (A), and a copolyester mainly comprising the copolyester (B). After laminating the layer (B), the laminate can be obtained by sandwiching it in a metal roll having an embossed pattern or grain pattern, solidifying by cooling, and transferring the roll shape of the embossed pattern or grain pattern to the laminate surface. The surface of the laminate is preferably textured to achieve a leather-like feel. Lamination thickness can be freely taken according to the use to use from the point of the flexibility of a support substrate (A). Usually, the range of 20 to 1000 μm is preferable, and from the viewpoint of film forming stability, it is preferably 30 to 500 μm, and more preferably 50 to 400 μm.

  The copolymer polyester layer (B) thus obtained is obtained as a substantially non-oriented, non-oriented resin or film having a plane orientation coefficient fn of 0.00 to 0.04.

  Next, as a method of laminating the topcoat layer (C) on the copolyester layer (B) surface of the laminate in which the supporting base material (A) and the copolyester layer (B) are laminated, an extrusion laminating method is used. And a coating method. The coating method may be performed by either a method of coating on the extrusion laminating step or the film forming step, or a method of coating in a separate step after the extrusion laminating or film forming. As a method of adding the inorganic filler to the top coat agent, it is preferable to mix the inorganic filler in the solution of the top coat agent so that the top coat layer (C) is in the range of 2 to 20% by weight after drying.

  By forming the topcoat layer (C) of polyurethane resin or acrylic resin containing 2 to 20% by weight of inorganic filler, it can be used as the interior skin material of the present invention.

  The interior skin material of the present invention has excellent wear resistance and excellent matting properties due to the effect of the topcoat layer (C) containing an inorganic filler, and due to the effect of the copolymerized polyester layer (B), Moreover, it can be made into a non-chlorine film that is flexible and has excellent molding followability, and can provide a material that has a leather-like feel. Moreover, since it is excellent in oil resistance, these can be used suitably as a skin material for interiors for houses, a skin material for vehicle interiors such as trains and automobiles, and a synthetic leather-like sheet.

EXAMPLES Hereinafter, although this invention is demonstrated along an Example, this invention is not restrict | limited by these Examples. Various characteristics were measured and evaluated by the following methods.
(1) Glass transition temperature (Tg), crystallization temperature (Tc) and melting point (Tm)
Using a differential scanning calorimeter DSCII type manufactured by Seiko Instrument Co., Ltd., a glass transition temperature (Tg) and a crystallization temperature (Tg) were obtained from a DSC curve when a sample 5 mg was heated at a heating rate of 10 ° C./min. Tc) and melting point (Tm) were determined. The peak temperature of the endothermic melting curve was defined as the melting point (Tm).
(2) Average particle diameter of inorganic filler The resin of the topcoat layer (C) is removed by a plasma low-temperature ashing method to expose the inorganic filler. The treatment conditions are such that the resin is incinerated but the inorganic filler is not damaged. This was observed with a scanning microscope for 5,000 to 10,000 particles, and the average particle diameter of the particle image was determined from the equivalent circle diameter with an image processing apparatus.
(3) Surface roughness Ra of satin drum
Using a 80 μm thick triacetyl cellulose film (Bioden RFA triacetyl cellulose / solvent: methyl acetate), applying a linear pressure of 9.8 N / cm with a pressure roller to the surface of the triacetyl cellulose film with a pressure roller, the surface shape of the satin drum The replica sample was used as a measurement sample after drying the solvent at room temperature.

The surface side to which the drum surface shape of the measurement sample was transferred was measured using a high precision thin film level difference meter ET-10 manufactured by Kosaka Laboratory. Measurement was performed under the conditions of a stylus tip radius of 0.5 μm, a needle pressure of 5 mg, a measurement length of 1 mm, and a cut-off of 0.08 mm. The definition of each parameter is shown in, for example, Nara Jiro surface roughness evaluation method (General Technology Center, 1983).
(4) Average unevenness depth of interior skin material Using a laser microscope VK8510 manufactured by KEYENCE, the processed surface has 10 irregularities with a magnification of 10 times, a profile (plurality) mode, a measurement length of 1490 μm, and a pitch of 0.1 μm. Measure the profile, find the difference value (= MAX depth-MIN depth) with the lowest value as the MIN depth and the highest value as the MAX depth, and calculate the average of the difference values obtained from each profile. The average uneven depth was assumed.
(5) Elastic modulus under 23 ° C. atmosphere and elongation at break The measurement of the elastic modulus of the copolymerized polyester (B) in the interior skin material under the 23 ° C. atmosphere is first performed by measuring the main component of the copolymerized polyester layer (B). A film of copolymerized polyester (B) as a component was prepared.

  The copolyester (B) pellets (100% by weight) were administered to a vent type different-direction twin screw extruder A (two vent ports, L / D = 70) set to an extrusion temperature of 230 ° C. and set to 230 ° C. The film was led into a T die die with a slit gap of 0.8 mm and extruded into a film shape. Both ends of the extruded sheet were combined with an electrostatic application method and an air chamber method using a needle-like edge pinning device, and the surface temperature was 25 ° C. A copolyester film having a thickness of 100 μm was prepared by closely contacting a satin casting drum (center line surface roughness Ra = 200 to 350 nm) and solidifying by cooling.

From this copolymerized polyester film, a sample having a length of 200 mm and a width of 10 mm was cut in two directions, the machine direction and the width direction, and in accordance with ASTM-D-882-81 (Method A), a test length of 100 mm in an atmosphere at 23 ° C. A tensile test was conducted using a Tensilon universal tester UTC-100 manufactured by Orientec Co., Ltd. at a tensile speed of 200 mm / min, and the elastic modulus was measured. The number of tests was set to n = 5 in both the longitudinal direction and the width direction, the average value in the longitudinal direction and the width direction was determined, and this was defined as the elastic modulus in a 23 ° C. atmosphere. The breaking elongation was also measured under the same measurement conditions.
(6) Flexibility For the flexibility of the interior skin material, the interior skin material was cut into A4 size, bent by hand 10 times, and evaluated for flexibility according to the following criteria. If it is (circle) and (triangle | delta), it is suitable as what satisfies this invention.

  ○ (Good): Excellent flexibility and suitable as an interior skin material.

  Δ (possible): Slightly inferior, but practically no problem as an interior skin material.

X (impossible): Inferior flexibility and unsuitable as an interior skin material.
(7) Matting property The matting property of the interior skin material is determined by using the digital variable angle gloss meter UGD-5D manufactured by Suga Test Instruments Co., Ltd. on the top coat surface of the interior skin material. 20 arbitrary positions on the surface side of the interior skin material were measured at 60 ° from the normal direction of the surface of the skin material for the interior, and the average value of the glossiness was determined. The matte property was determined from the average glossiness according to the following criteria. If it is (circle) and (triangle | delta), it is suitable as what satisfies this invention.

  ○ (Good): Glossiness of less than 20%.

  Δ (possible): Glossiness in the range of 20 to 50%.

X (impossible): The glossiness exceeds 50%.
(8) Oil resistance The oil resistance of the interior skin material is first cut into a size of 60 mm x 60 mm, with a thickness of 2.5 mm or more and a size of 60 mm or more so that the top coat surface of the interior skin material becomes the test surface. A test sample is prepared by fixing the substrate with an adhesive using an adhesive. In addition, medical gauze is cut into 47 mmφ, and four sheets are stacked, and this medical gauze is impregnated with about 1 g (about 1.2 ml) of liquid paraffin. Place this medical gauze in the center of the test sample. The test sample is covered with a glass petri dish and left in a hot air oven at 80 ° C. for 24 hours. After the test, the liquid paraffin was wiped off, and the surface of the test sample was visually observed for wrinkles and swelling, and the oil resistance was evaluated according to the following criteria. If it is (circle) and (triangle | delta), it is suitable as what satisfies this invention.

  ○ (good): No change in surface condition.

  Δ (possible): The surface is slightly swollen and uneven.

X (impossible): The surface is clearly swollen and uneven (wrinkled).
(9) Abrasion resistance The topcoat layer (C) surface of the interior skin material was subjected to a Taber abrasion test with a load of 500 g and 100 rotations in accordance with JIS-K7204. The glossiness of the topcoat layer (C) before and after the abrasion test was measured, and evaluated according to the glossiness difference (the following formula) as follows. Glossiness is measured by using a digital variable angle glossmeter UGD-5D manufactured by Suga Test Instruments Co., Ltd., measuring the incident angle and detection angle at 60 ° from the normal direction of the film surface, and measuring five points before and after the abrasion test. The average value of degrees was obtained. The average value of the glossiness obtained was evaluated for wear resistance according to the following criteria. X indicates that the wear marks on the entire worn surface can be visually confirmed, so that ○ and Δ are suitable for satisfying the present invention.

Gloss level difference (%) = Glossiness before test-Glossiness after test (formula)
○ (good): Gloss level difference of 0 to 20%.

  Δ (possible): Gloss difference is in the range of 20-40%.

X (impossible): Gloss level difference of 40 to 100%.
(10) Shape followability The shape followability of the interior skin material is determined by applying a test sample in which the topcoat layer (C) is applied to the copolymer polyester (B) film obtained in (5) above, in the machine direction, Each sample in the width direction was cut into a test sample having a length of 200 mm and a width of 10 mm, and was conditioned in advance for 1 day or more in an atmosphere of a temperature of 23 ° C. and a humidity of 65% RH. Using this test sample, a tensile test was performed using a Tensilon universal testing machine UTC-100 manufactured by Orientec Co., Ltd. under a test length of 100 mm, a tensile speed of 200 mm / min, and a 23 ° C. atmosphere. The tensile test was stopped at a position where the strain was 100%, the test piece was taken out, and a crack on the surface of the test piece was observed with an optical microscope (50 times magnification). It was observed from 100% strain to 100% strain in 100% increments. The number of tests was set to n = 5 in both the longitudinal direction and the width direction, the strain in which cracks were observed was measured, average values in the longitudinal direction and the width direction were obtained, and molding followability was evaluated according to the following criteria.

  ○ (good): No crack observed in the range of 100 to 1000% strain.

  Δ (possible): A crack is observed in a strain of 300 to 1000%.

X (impossible): A crack is observed at a strain of 100%.
(12) Touch feeling The touch feeling of the interior skin material was evaluated by touching the skin material with a hand and evaluating the touch feeling according to the following criteria. If it is (circle) and (triangle | delta), it is suitable as what satisfies this invention.

  ○ (good): A leather-like hand feeling is obtained, and it is excellent as an interior skin material.

  Δ (possible): A leather-like hand feeling is slightly inferior, but there is no practical problem as an interior skin material.

X (impossible): A leather-like hand feeling is not obtained, and it is inferior as an interior skin material.
(13) Comprehensive evaluation Based on the evaluation results of flexibility, matteness, oil resistance, wear resistance, shape followability, and touch feeling, the evaluation was made according to the following criteria. If it is (circle) and (triangle | delta), it is suitable as what satisfies this invention.

  ○ (Good): All the evaluations of flexibility, matte property, oil resistance, wear resistance, shape following property, and touch feeling are all evaluated as ○, and are suitable as an interior skin material.

  △ (possible): Flexibility, mattness, oil resistance, wear resistance, shape followability, and touch feeling were evaluated as △ for one item or two items, but otherwise evaluated as ◯. It can withstand practical use as an interior skin material.

  X (impossible): At least one item is evaluated as x for flexibility, matte property, oil resistance, abrasion resistance, shape following property, and touch feeling, or three or more items are evaluated as △. As a skin material for interior use, it is difficult to withstand practical use.

In Examples and Comparative Examples, the following polyesters, copolymerized polyesters, support base materials, top coat resins, inorganic fillers, colorants, end-capping agents, foaming agents, and adhesives are used. Processing was carried out.
[Polyethylene terephthalate 1 (PET-1)]
To a mixture of 91.5 parts by weight of dimethyl terephthalate and 58.5 parts by weight of ethylene glycol, 0.09 parts by weight of magnesium acetate and 0.03 parts by weight of diantimony trioxide are added, and the temperature is raised by heating in a conventional manner. A transesterification reaction was performed. Next, 0.026 part by weight of trimethyl phosphate was added to the transesterification reaction product, and then transferred to a polycondensation reaction tank. Next, the reaction system was gradually depressurized while being heated and heated, and polymerization was performed at 290 ° C. under a reduced pressure of 1.33 × 10 ² Pa or less to obtain polyester pellets having an intrinsic viscosity of 0.65 dl / g.
[Polyethylene terephthalate 2 (PET-2)]
The polyester pellets obtained from the above PET-1 were crystallized at 130 ° C. for 3 hours, and then subjected to solid state polymerization at 230 ° C. for 10 hours under reduced pressure to obtain polyester pellets having an intrinsic viscosity of 1.23 dl / g. It was.
[Copolyester 1]
A mixture of 41.4 parts by weight of dimethyl terephthalate, 13.2 parts by weight of dimethyl isophthalate and 48.7 parts by weight of 1,4-butanediol was charged with 0.03 parts by weight of tetrabutyl titanate and 0.011 parts by weight of IRGANOX1010FP, Transesterification was carried out according to a conventional method while raising the temperature from 150 ° C. to 210 ° C., and then 0.01 part by weight of trimethyl phosphoric acid was added, and 10 minutes later, 0.066 part by weight of tetrabutyl titanate and 0.025 part by weight of IRGANOX 1010FP A mixed slurry of 34.2 parts by weight / 12.4 parts by weight of dimer acid (PRIPOL 1025: manufactured by Unikema) heated to 50 ° C. in advance was added. After the can internal temperature returned to 210 ° C., the mixture was stirred for 30 minutes and then transferred to a polymerization reaction tank, and a polycondensation reaction was performed according to a conventional method. Finally, a polycondensation reaction is performed at 240 ° C. and 1.33 × 10 ² Pa or less to obtain pellets of copolymer polyester 1 having an intrinsic viscosity of 1.02 dl / g, isophthalic acid 20 mol%, and dimer acid 17 mol%. It was.
[Copolyester 2]
Except for changing the content of the dimer acid, a pellet of the copolymer polyester 2 containing 20 mol% isophthalic acid and 13 mol% dimer acid was obtained in the same manner as the copolymer polyester 2.
[Copolyester 3]
A mixture of 54.7 parts by weight of dimethyl terephthalate, 18.0 parts by weight of ethylene glycol, 20.3% by weight of 1,4-butanediol, 0.04 parts by weight of tetrabutyl titanate, 0.016 parts by weight of IRGANOX 1010FP, and 150 to 210 ° C. Transesterification was conducted according to a conventional method while raising the temperature to 0 ° C., and then 0.042 part by weight of trimethyl phosphoric acid was added, and 10 minutes later, 0.055 part by weight of tetrabutyl titanate, 0.022 part by weight of IRGANOX 1010FP, 50 parts in advance. A mixed slurry of dimer acid (PRIPOL 1025: manufactured by Unikema Corp.) 41.8 parts by weight / 11.4 parts by weight of 1,4-butanediol / 3.8 parts by weight of ethylene glycol heated to ° C. was added. After the can internal temperature returned to 210 ° C., the mixture was stirred for 30 minutes and then transferred to a polymerization reaction tank, and a polycondensation reaction was performed according to a conventional method. Finally, a polycondensation reaction was performed at 245 ° C. and 1.33 × 10 ² Pa or less to obtain pellets of copolymerized polyester 3 having an intrinsic viscosity of 0.90 dl / g and a dimer acid of 20 mol%.
[Copolyester 4]
Charged 54.7 parts by weight of dimethyl terephthalate, 48.5% by weight of 1,4-butanediol, 0.04 parts by weight of tetrabutyl titanate, 0.016 parts by weight of IRGANOX1010FP, and then heated while raising the temperature from 150 ° C to 210 ° C. Then, 0.042 parts by weight of trimethyl phosphoric acid was added, and 10 minutes later, 0.055 parts by weight of tetrabutyl titanate, 0.022 parts by weight of IRGANOX 1010FP, dimer acid (PRIPOL 1025 heated to 50 ° C. in advance) 34.3 parts by weight / 1,4-butanediol 12.5 parts by weight of mixed slurry was added. After the can internal temperature returned to 210 ° C., the mixture was stirred for 30 minutes and then transferred to a polymerization reaction tank, and a polycondensation reaction was performed according to a conventional method. Finally, a polycondensation reaction was performed at 245 ° C. and 1.33 × 10 ² Pa or less to obtain pellets of copolymerized polyester 4 having an intrinsic viscosity of 0.85 dl / g and a dimer acid of 17 mol%.
[Copolyester 5-6]
Except for changing the content of the dimer acid, a pellet of the copolymer polyester 5 with 25 mol% of the dimer acid and a pellet of the copolymer polyester 6 with 3 mol% of the dimer acid were obtained in the same manner as the copolymer polyester 4.
[Polyurethane (PU) resin]
“Mikutran” P190 manufactured by Nippon Mikutran Co., Ltd. was used as the polyurethane resin.
[Polypropylene (PP) resin]
As the polypropylene resin, “Prime Polypro” E111G manufactured by Prime Polymer Co., Ltd. was used.
[Colorant Master 1 (MS-1)]
A mixture of 75 parts by weight of the pellets of copolymer polyester 1 obtained above and 25 parts by weight of carbon black (Tokai Black # 8500 / F manufactured by Tokai Carbon Co., Ltd.) was mixed at 230 ° C. using a vented different direction two-extruder. To obtain pellets of Colorant Master 1 containing 25% by weight of carbon black.
[Colorant Master 2 (MS-2)]
Using the copolyester 1 obtained above, a mixture of 90 parts by weight and 10 parts by weight of Bengala powder (Pigment Red 101) was kneaded at 230 ° C. using a vented different-direction two-extruder, and 10 parts by weight of Bengala. % Colorant master 2 pellets were obtained.
[End sealant master 3 (MS-3)]
A mixture of 90 parts by weight of copolyester 1 and 10 parts by weight of an epoxy end-capping agent (TEPIC-S manufactured by Nissan Chemical Industries) was kneaded at 230 ° C. using a vented different-direction twin screw extruder, and epoxy A pellet of 10 wt% master 3 was obtained.
[End sealant master 4 (MS-4)]
A mixture of 90 parts by weight of copolyester 1 and 10 parts by weight of carbodiimide (STABAXOL P-100 manufactured by Rhein Chemie Japan) was kneaded at 230 ° C. using a vented different-direction twin screw extruder, and a carbodiimide end-capping agent. A 10 wt% master 4 pellet was obtained.
[Polyethylene terephthalate (PET) knitted fabric]
The PET-2 (intrinsic viscosity IV = 1.23 dl / g) was poured into a melt extruder and extruded from a perforated die having 50 holes with a diameter of 1 mm. PET extruded linearly from a perforated die was cooled with dry nitrogen, a speed difference was applied to the winder, and the film was stretched 3 times in the longitudinal direction. Next, using a winder that circularly moves in the direction perpendicular to the flow direction, the film was further wound three times in the longitudinal direction while being twisted to obtain a PET fiber. The thickness of the fiber was 70 dtex. The PET fiber was processed into knit knitting to obtain a PET knitted fabric.
[Polyethylene terephthalate (PET) non-woven fabric]
A mixture obtained by adding 0.5% by weight of ethylenebisstearic acid amide (“Alflow” (registered trademark) H-50T manufactured by NOF Corporation) to the above PET-1 (intrinsic viscosity IV = 0.65 dl / g) was extruded. After melting at a temperature of 280 ° C. and spinning from a pore having a die temperature of 300 ° C., spinning is performed by an ejector at a spinning speed of 4300 m / min, and the yarn is charged and opened by a known method on a moving net conveyor. Collected as a fiber web. The collected fiber web was thermocompression bonded with an embossing roll having a crimping area ratio of 10% under the conditions of a temperature of 180 ° C. and a linear pressure of 700 N / cm to obtain a PET nonwoven fabric having a fineness of 2 dtex and a basis weight of 260 g / m ² .
[Polylactic acid (PLA) knit knitted fabric]
A polylactic acid resin of “Lacia H-400” MFR = 2 g / 10 minutes (190 ° C.) manufactured by Mitsui Chemicals, Inc. was poured into a melt extruder and extruded from a perforated die having 50 holes with a diameter of 1 mm. The polylactic acid resin extruded linearly from the die was cooled with dry nitrogen, a speed difference was applied to the winder, and the film was stretched 3 times in the longitudinal direction. Next, using a winder that circularly moves in the direction perpendicular to the flow direction, the film was further wound three times in the longitudinal direction while being twisted to obtain a polylactic acid fiber. The thickness of the fiber was 70 dtex. The polylactic acid fiber was processed into a knit knitting to obtain a PLA knitted fabric.
[Polylactic acid (PLA) foam]
A mixture of 99.5 parts by weight of polylactic acid resin (“Lacia H-400” manufactured by Mitsui Chemicals, Inc.) and 0.5 parts by weight of carbodiimide-modified isocyanate (“LA-1” manufactured by Nisshinbo) The liquefied carbon dioxide in a supercritical state was injected into a cylinder part melted in the extruder. Next, it was extruded and foamed into a cylindrical shape from a circular die having a slit width of 1 mm while being cooled by the other extruder connected by a short tube. The obtained cylindrical foam sheet was slit in the flow direction and developed to obtain a polylactic acid foam having a foaming ratio of 3 times.
[Polyurethane (PU) foam]
Using 100% by weight pellets of polyurethane {"Mikutran" P190} manufactured by Nippon Miktran Co., Ltd.], it was poured into a tandem extruder equipped with a liquefied material injection device, and in the cylinder part melted in the extruder, supercritical liquefied dioxide Carbon was injected. Next, it was extruded and foamed into a cylindrical shape from a circular die having a slit width of 1 mm while being cooled by the other extruder connected by a short tube. The obtained cylindrical foamed sheet was slit in the flow direction and developed to obtain a polyurethane foam having a foaming ratio of 3 times.
[Polypropylene (PP) foam 1]
100% by weight pellets of polypropylene {"Prime Polypro" E111G} made by Prime Polymer Co., Ltd. are poured into a tandem extruder equipped with a liquefied material injection device, and the liquefied material in a supercritical state is liquefied in the cylinder part melted in the extruder. Carbon dioxide was injected. Next, it was extruded and foamed into a cylindrical shape from a circular die having a slit width of 1 mm while being cooled by the other extruder connected by a short tube. By slitting and developing the obtained cylindrical foam sheet in the flow direction, a polypropylene foam 1 having a foaming ratio of 3 times was obtained.
[Polypropylene (PP) foam 2]
90 parts by weight of propylene resin (MFR = 0.7) obtained by random copolymerization of 4% by weight of ethylene with propylene, 10 parts by weight of azodicarbonamide as a foaming agent, 4 parts by weight of divinylbenzene as a crosslinking aid, and as a heat stabilizer Add 0.2 parts by weight of “Irgnox” 1010, pre-mix with a mixer, put the mixture into a single screw extruder, adjust the average resin temperature to 180 ° C. or less so as not to decompose the foaming agent, melt extrusion, Further, the foamed resin composition sheet having a thickness of 1.75 mm was molded. Next, the foamable resin composition sheet was crosslinked by irradiating with an electron dose of 5 Mrad using an electron beam irradiator (800 kV) to obtain a foamable resin composition crosslinked sheet. Furthermore, the foamable resin composition cross-linked sheet was heated to about 230 to 240 ° C. above the decomposition temperature of the foaming agent in the foaming apparatus to obtain a polypropylene foam 2 having a double expansion ratio.
[Corona discharge treatment]
Corona discharge treatment was performed according to the method of JIS K6782 so that the wetting index was 45 mN / m or more.
[Needle punch (NP) treatment]
Silicon was sprayed on the treated surface, and a needle punch was repeated 50 times at a needle density of 1000 / cm ² using a barbed needle to perform the fiber opening treatment of the supporting substrate.
[Water jet punch (WJP) processing]
The water jet punch is a method of opening a supporting substrate by a water jet flow ejected from a plurality of nozzles (diameter 0.2 mm, pitch 0.8 mm) arranged in a line in the weft arrangement direction of a woven fabric under a water pressure of 3 MPa. Processed.
[Sandblasting (SB) processing]
Sand having an average particle diameter of 0.1 to 2 mm was subjected to fiber opening treatment of the supporting substrate and surface treatment of the interior skin material under the conditions of a nozzle diameter of 4 mm and an air pressure of 0.5 MPa.
[adhesive]
Using a two-component type TAKELITE 4010A / TAKELITE 4000B, the resin amount was applied so that the thickness of the solid content was 1 μm.
[Foaming agent]
“Cell microphone 417” (produced gas amount: 90) manufactured by Sankyo Kasei Co., Ltd. was used.
[Polyurethane resin]
“RA1353” manufactured by Mitsui Chemicals Co., Ltd. was dissolved in ethyl acetate and applied so that the solid content had a thickness of 0.1 to 10 μm, and ultraviolet rays of 365 nm were irradiated for 10 seconds to cure the resin.
[Acrylic resin]
“RA1328” manufactured by Mitsui Chemicals, Inc. was used. The resin was applied so that the solid content had a thickness of 0.1 to 10 μm, and irradiated with 365 nm ultraviolet rays for 10 seconds to cure the resin.
[Inorganic filler]
(1) Silica: “Sylobloc 25” manufactured by Grace Japan Co., Ltd. (average particle diameter: 2.5 μm)
(2) Talc: “SG-1000” manufactured by Nippon Talc Co., Ltd. (average particle size: 2 μm)
[Drying conditions for raw materials]
Copolyester pellets 1 to 6 and colorant master pellets MS-1 and MS-2 are 130 ° C. × 5 hours under reduced pressure, and end-capping agent master pellets MS-3 and MS-4 are 70 ° C. under reduced pressure. It was dried for 7 hours and used in the following examples and comparative examples.

Example 1
A PET knit knitted fabric was used as the supporting substrate (A), and the surface layer of the PET knit knitted fabric on which the copolymerized polyester layer (B) was laminated was previously subjected to a fiber opening treatment with a needle punch. The opened surface was subjected to corona discharge treatment.

  As polyester of the copolyester layer (B), 70 parts by weight of copolyester 1, 1.0 part by weight of foaming agent, 30 parts by weight of coloring agent MS-1 and 5 parts by weight of terminal sealing agent MS-3 The PET knit knitted fabric wound in a roll shape is unwound and laminated on the PET knit knitted fabric while the polyester is foamed from a T die having a slit gap of 1 mm (thickness). The copolyester layer (B) was laminated with a thickness of 350 μm, sandwiched between textured metal rolls, and cooled and solidified to obtain a laminate.

  Next, the foamed copolyester layer (B) surface of the laminate was preliminarily subjected to corona discharge treatment, and 1 μm was applied by a hand coater as the solid content thickness with an adhesive.

  After applying the adhesive, use a silica-containing polyurethane resin as the topcoat layer (C), adjust the solution so that the silica content is 6.5% by weight after curing, and apply a solid content of 5 μm Then, ultraviolet rays (365 nm) were irradiated for 10 seconds to cure the topcoat layer (C) to obtain an interior skin material.

(Example 2)
The PP foam 1 was used as the supporting substrate (A), and the surface layer of the PP foam 1 on which the copolymerized polyester layer (B) was laminated was previously subjected to sandblasting. Further, the treated surface was subjected to corona discharge treatment, and 1 μm was applied by a hand coater with the adhesive as the solid thickness.

  As polyester of the copolyester layer (B), 40 parts by weight of copolyester 2, 0.5 parts by weight of the foaming agent, 60 parts by weight of the colorant MS-2, and 10 parts by weight of the end-capping agent MS-4. Part of the mixture was poured into a laminating melt extruder set at 230 ° C., the PP foam 1 wound in a roll was unwound, and the polyester was laminated on the PP foam 1 while foaming from a T-die having a slit gap of 1 mm ( The foamed copolyester layer (B) was laminated with a thickness of 200 μm, sandwiched between textured metal rolls, cooled and solidified to obtain a laminate.

  Next, the foamed copolymer polyester layer (B) surface of the laminate was previously subjected to corona discharge treatment, and 1 μm was applied with a hand coater with the adhesive as the solid content thickness. After applying the adhesive layer, use a talc-containing acrylic resin as the top coat layer (C), adjust the solution so that the talc content is 10% by weight after curing, and set the solid content thickness to 3 μm by hand coater And the top coat layer (C) was cured by irradiating with ultraviolet rays (365 nm) for 10 seconds to obtain an interior skin material.

(Example 3)
As the support substrate (A), a PET nonwoven fabric was used, and the surface layer of the PET nonwoven fabric on which the copolymerized polyester layer (B) was laminated was subjected to corona discharge treatment in advance.

  As polyester of the copolyester layer (B), 75 parts by weight of copolyester 3, 2.0 parts by weight of foaming agent, 25 parts by weight of coloring agent MS-1 and 5 parts by weight of end-capping agent MS-4 Is cast into a laminating melt extruder set at 230 ° C., a PET nonwoven fabric wound in a roll shape is unwound from a T-type die having a slit gap of 1 mm, and polyester is foamed from the T-die having a slit gap of 1 mm on the PET nonwoven fabric. The foamed copolyester layer (B) was laminated with a laminate (thickness: 300 μm), sandwiched between embossed metal rolls having a depth of 300 μm and a size of 0.4 mm, and cooled and solidified to obtain a laminate.

  Next, the foamed copolymer polyester layer (B) surface of the laminate was previously subjected to corona discharge treatment, and 1 μm was applied with a hand coater with the adhesive as the solid content thickness. After applying the adhesive layer, using a silica-containing polyurethane resin as the topcoat layer (C), adjusting the solution so that the silica content is 5% by weight after curing, and using a hand coater with a solid content of 6 μm It was applied and irradiated with ultraviolet rays (365 nm) for 10 seconds to cure the topcoat layer (C) to obtain an interior skin material.

Example 4
Using PP foam 2 as the supporting substrate (A), the surface layer of PP foam 2 on which the copolyester layer (B) is laminated in advance is subjected to corona discharge treatment, and the adhesive is 1 μm in thickness as a solid content. Was applied with a hand coater.

  Next, as a polyester of the copolymer polyester layer (B), 75 parts by weight of the copolymer polyester 4, 1.0 part by weight of the foaming agent, 25 parts by weight of the colorant MS-2, and 5 of the end sealant MS-4 are used. Part by weight of the mixture is poured into a melt extruder set at 230 ° C., passed through a leaf disk filter with a filtration accuracy of 30 μm, led to a T-die die with a slit gap of 1 mm, and extruded into a sheet. By using both an electrostatic application method using a needle-like edge pinning device and an air chamber method at both ends of the extruded sheet, the sheet is brought into close contact with a satin casting drum adjusted to a surface temperature of 25 ° C., and then cooled and solidified from a molten state. A film of copolymerized polyester 4 having a thickness of 200 μm was obtained.

  Next, the film of the copolymer polyester 4 was laminated on the adhesive laminate surface of the PP foam 2 and the copolymer polyester layer (B) was bonded using a laminator to obtain a laminate. Through the obtained copolymer polyester layer (B) surface side, it is passed at a speed of 1 m / min between a stamping embossing roll having a depth of 300 μm and a size of 0.4 mm square heated to 120 ° C. and a paper roll. , 200 MPa, pressurized to a room temperature, and embossed with an average depth of 135 μm.

  Next, the embossed surface of the laminate was subjected to corona discharge treatment, and 1 μm was applied by a hand coater with the adhesive as the solid thickness. After the adhesive layer is applied, a silica-containing acrylic resin is used as the topcoat layer (C), the solution is adjusted so that the silica content is 7.5% by weight after curing, and the thickness of the solid content is 10 μm. It was coated with a hand coater and irradiated with ultraviolet rays (365 nm) for 10 seconds to cure the topcoat layer (C) to obtain an interior skin material.

(Example 5)
PLA knit knitted fabric is used as the supporting substrate (A), and the surface layer of the PLA knit knitted fabric on which the copolymer polyester layer (B) is previously laminated is subjected to fiber opening treatment with a water jet punch, and the adhesive is solidified. A thickness of 1 μm was applied.

  Next, copolymer polyester 5 is used as copolymer polyester (B) of copolymer polyester layer (B), talc is used as the inorganic filler contained in top coat layer (C), and the amount of talc added is 10 wt. %, Except that the copolyester layer (B) is laminated on the supporting base material (A) by extrusion laminating, and the corona discharge treatment, the adhesive layer, the topcoat layer ( C) were sequentially laminated, and the topcoat layer (C) was cured to obtain an interior skin material.

(Example 6)
A PET nonwoven fabric was used as the supporting substrate (A), and no processing was performed. Further, the copolyester 1 was extruded and laminated on the supporting substrate (A) in the same manner as in Example 1 except that the amount of the inorganic filler (silica) added to the topcoat layer (C) was 15% by weight. The copolymerized polyester layer (B) was laminated, the corona discharge treatment, the adhesive layer, and the topcoat layer (C) were sequentially laminated, and the topcoat layer (C) was cured to obtain an interior skin material.

(Example 7)
PLA foam is used as the support substrate (A), and the surface layer of the PLA foam on which the copolyester layer (B) is laminated is treated with sandblasting, and 1 μm is applied with the adhesive as the solid content. did.
Next, the copolymer polyester 2 is used as the copolymer polyester (B) of the copolymer polyester layer (B), and the addition amount of the inorganic filler (talc) in the top coat layer (C) is 5.5% by weight. In the same manner as in Example 2, the copolymerized polyester layer (B) was laminated on the supporting substrate (A) by extrusion lamination of the copolymerized polyester 2, and the corona discharge treatment, the adhesive layer, and the topcoat layer (C) were formed. It laminated | stacked sequentially and the topcoat layer (C) was hardened and the skin material for interiors was obtained. Further, the surface of the top coat layer (C) of the interior skin material was subjected to sandblasting.

(Example 8)
As the copolymer polyester layer (B), except that the foaming agent was not added and the foam was not foamed, the copolymer polyester layer 1 was formed by extrusion lamination of the copolymer polyester 1 on the support substrate (A) in the same manner as in Example 1. B) was laminated, a corona discharge treatment, an adhesive layer, and a topcoat layer (C) were sequentially laminated, and the topcoat layer (C) was cured to obtain a laminate.

(Comparative Example 1)
Except that the top coat layer (C) was not laminated, the copolymer polyester layer (B) was laminated on the supporting base material (A) by extrusion lamination in the same manner as in Example 1, and the laminate. Got.

(Comparative Example 2)
Except that the inorganic filler of the topcoat layer (C) was not contained, the copolymerized polyester layer (B) was laminated on the supporting substrate (A) by extrusion lamination in the same manner as in Example 1. The corona discharge treatment, the adhesive layer, and the topcoat layer (C) were sequentially laminated, and the topcoat layer (C) was cured to obtain a laminate.

(Comparative Example 3)
The copolymerized polyester layer (B) was changed to the copolymerized polyester 6, and the copolymerized polyester layer (B) was laminated on the supporting substrate (A) by extrusion lamination in the same manner as in Example 1. The corona discharge treatment, the adhesive layer, and the topcoat layer (C) were sequentially laminated, and the topcoat layer (C) was cured to obtain a laminate.

(Comparative Example 4)
In the same manner as in Example 2, except that PP foam 1 was used as the supporting base material (A) and a polypropylene resin containing 5% by weight of carbon black having a thickness of 400 μm was laminated as the copolyester layer (B). A polypropyne resin was laminated on the material (A) by extrusion lamination, a corona discharge treatment, an adhesive layer, and a topcoat layer (C) were sequentially laminated, and the topcoat layer (C) was cured to obtain a laminate.

(Comparative Example 5)
As in Example 2, except that PU foam was used as the support substrate (A) and polyurethane resin containing 5% by weight of carbon black having a thickness of 400 μm was laminated as the copolyester layer (B). A polyurethane resin was extruded and laminated in (A), a corona discharge treatment, an adhesive layer, and a topcoat layer (C) in this order, and the topcoat layer (C) was cured to obtain a laminate.

  Table 1, Table 2, Table 3, and Table 4 collectively show the structure of the skin material used in the above Examples and Comparative Examples and the evaluation results of the skin material properties.

  In Tables 1 to 4, the abbreviations used are shown.

TC: Top coat NP: Needle punch SB: Sand blast WJP: Water jet punch PET: Polyethylene terephthalate PLA: Polylactic acid PU: Polyurethane PP: Polypropylene PE: Polyethylene The interior skin material obtained in Examples 1 to 7 is flexible. It was a skin material excellent in matteness, oil resistance, wear resistance, molding followability, and feel.

  Moreover, the skin material for interior obtained in Example 8 was a skin material excellent in matte property, oil resistance, wear resistance, molding followability, and touch feeling, although it was slightly inferior in flexibility.

  On the other hand, the laminates obtained in Comparative Examples 1 to 5 are inferior in flexibility, matteness, oil resistance, wear resistance, molding followability, and touch feeling, and are not satisfactory as a skin material. It was.

  The interior skin material of the present invention can provide an interior skin material excellent in oil resistance, wear resistance, molding followability, flexibility, and matte properties.

  More specifically, it is excellent in oil resistance, flexibility and molding followability by laminating a copolymerized polyester layer (B) having a specified elastic modulus in an atmosphere at 23 ° C. on a supporting base material (A). By laminating the hard coat layer (C) containing an inorganic filler, it is possible to obtain an interior skin material having excellent wear resistance and matting properties.

  The skin material for interior use of the present invention can be suitably used as a skin interior material for vehicle interiors such as trains and automobiles, reception sets, furniture, and the like because a leather-like feel can be obtained.

Claims (9)

An interior skin material in which a copolymerized polyester layer (B) and a topcoat layer (C) are sequentially laminated on at least one surface of a supporting substrate (A),
The copolymer polyester layer (B) is a polyester mainly composed of a copolymer polyester (B) having an elastic modulus in a range of 10 to 1000 MPa at 23 ° C.,
An interior skin material, wherein the surface gloss of the topcoat layer (C) is 50% or less.   2. The interior skin material according to claim 1, wherein the top coat layer (C) is made of a polyurethane resin or an acrylic resin containing 2 to 20 wt% of an inorganic filler.   The interior skin material according to claim 1 or 2, wherein the copolymerized polyester layer (B) is a foamed copolymerized polyester layer (B) foamed at a foaming ratio of 1.1 to 4 times. The interior covering material according to any one of claims 1 to 3, wherein the copolymerized polyester layer (B) satisfies the following requirements (1) and (2).
(1) It is composed of a copolymerized polyester containing 60 to 95 mol% of an aromatic dicarboxylic acid component and 5 to 40 mol% of an aliphatic dicarboxylic acid component with respect to 100 mol% of the dicarboxylic acid component, (2 ) Containing at least one glycol component having 10 or less carbon atoms as a glycol component.   The dimer content in the aliphatic dicarboxylic acid component is 70 to 90% by weight, and the trimer content is 10 to 30% by weight. Skin material for interior.   The interior skin material according to any one of claims 1 to 5, wherein the aliphatic dicarboxylic acid component is a dimer acid or a dimer acid derivative.   The interior covering material according to any one of claims 1 to 6, wherein a pigment or a dye is contained in the copolymerized polyester layer (B) and / or the topcoat layer (C).   The interior skin material according to any one of claims 1 to 7, wherein the surface of the copolyester layer (B) and / or the topcoat layer (C) is subjected to a texture or embossing. .   The interior covering material according to any one of claims 1 to 8, wherein the supporting substrate (A) is composed of any one of a woven fabric, a knitted fabric, a nonwoven fabric, and a foam sheet.