JP7386622B2 - Interior surface material - Google Patents

Description

The present invention relates to interior surface materials.

The applicant has continued to study interior surface materials that include fiber aggregates (e.g., fiber webs, nonwoven fabrics, woven fabrics, knitted fabrics, etc.) as constituent members in order to provide interior surface materials that have excellent design and tactility. Ta.
As we continued our studies, we found that ``an interior surface material is provided with a printed layer on at least one main surface of a fiber aggregate, and the surface of the main surface of the interior surface material where the printed layer is exposed. We proposed an interior surface material (Patent Document 1) that satisfies the following conditions: ``The roughness (SMD) is less than 2.71 μm'' and ``The printed layer contains hollow particles.'' In the interior surface material of this configuration, the surface roughness (SMD) of the main surface where the print layer is exposed was small and the main surface was smooth, so the tactile sensation was improved.

International publication 2018/212245 pamphlet

However, similar to the interior surface material according to Patent Document 1, in an interior surface material in which a print containing particles is provided on at least one main surface of a fiber aggregate, the print is textured to improve the design. When a pattern or the like is discontinuously present (when a print is discontinuously present), a problem arises in that the tactile sensation of the main surface on the side where the print is present is somehow inferior. As a result, it has not been possible to provide an interior surface material with excellent design and tactility.
The present invention was made to solve these problems, and aims to provide an interior surface material with excellent design and tactility.

The present invention provides an interior surface material comprising a print containing particles on at least one main surface of a fiber aggregate, wherein the print exists discontinuously on the main surface, and A surface material for interior use in which the surface roughness (SMD) of the main surface of the surface material on the side where the print is present is 2.75 μm or more.

The present invention provides an interior surface material comprising a print containing particles on at least one main surface of a fiber aggregate, which comprises a print discontinuously present on the main surface, and It has a main surface (the main surface on the side where the print is present in the interior surface material) with a roughness (SMD) of 2.75 μm or more.
Until now, it has been thought that the fact that the surface roughness (SMD) of the main surface on the side where the print is present is small means that the main surface is smooth and can contribute to improving the tactile sensation. However, as a result of studies conducted by the applicant, it has been found that when an interior surface material has a print that is discontinuously present on the main surface, a small surface roughness (SMD) does not contribute to improving the tactile sensation. I found it.
Although the reason for this has not been completely elucidated, it is thought to be due to the following reasons.
In other words, when a person looks at an interior surface material that has a discontinuous print on its main surface, such as a leather grain pattern, it appears that the main surface has unevenness due to the discontinuous print. create an illusion. After that, when a person touches the main surface, if the main surface is smooth (the surface roughness (SMD) is small), the tactile sensation is implanted by an illusion and unconsciously imagines that the main surface is uneven and not smooth. A gap occurs between the imagined tactile sensation and the tactile sensation actually obtained by touching the main surface. As a result, due to the gap that occurs, the tactile sensation of the main surface is different from what one had imagined, and the person feels that the tactile sensation is inferior.
On the other hand, the present invention intentionally makes the main surface rough (large surface roughness (SMD)) in the interior surface material having a discontinuous print such as a leather grain pattern on the main surface. By doing so, it is possible to reduce the gap that occurs between the tactile sensation implanted by the illusion and unconsciously imagined, and the tactile sensation obtained by actually touching the main surface. Specifically, the gap can be reduced when the surface roughness (SMD) is 2.75 μm or more.
As described above, the present invention can provide an interior surface material with excellent design and tactility.

This is the pattern of the print or resin layer (a discontinuous leather grain pattern), and the black part in the figure is the part where the print or resin layer is present. This is another pattern of the print or resin layer (another pattern that exists discontinuously), and the black part in the figure is the part where the print or resin layer is present. This is yet another pattern of the print or resin layer (another pattern that exists discontinuously), and the black portion in the figure is the portion where the print or resin layer is present. This is yet another pattern of the print or the resin layer (another pattern that exists discontinuously), and the black portion in the figure is the portion where the print and/or the resin layer is present. This is yet another pattern of the print or resin layer (another pattern that exists discontinuously), and the black portion in the figure is the portion where the print or resin layer is present.

In the present invention, various configurations can be selected as appropriate, for example, the following configurations. Moreover, the various lower limit values and upper limit values illustrated can be arbitrarily combined as desired.

The interior surface material of the present invention has a structure including a fiber aggregate and a print on one main surface thereof.

The fiber aggregate as used in the present invention is, for example, a fiber web, a nonwoven fabric, or a sheet-like fabric such as a woven fabric or a knitted fabric. The interior surface material of the present invention is flexible because it contains fiber aggregates (particularly non-woven fabrics), and gives a sense of resistance and sliminess to people, giving it a moist feel and an excellent texture. Becomes the surface material. In addition, interior surface materials with fiber aggregates (especially nonwoven fabrics) in which all constituent fibers are randomly intertwined are more flexible and give people a sense of resistance and sliminess, giving them a moist feel. It is also preferable because it has an excellent tactile feel, such as a high .
Moreover, since the interior surface material of the present invention contains a fiber aggregate, it is flexible and has excellent followability to a mold. In particular, it is preferable that the fiber aggregate constituting the interior surface material of the present invention is a nonwoven fabric (particularly a nonwoven fabric in which all the constituent fibers are randomly intertwined) because it is more flexible and has excellent followability to molds. .

The constituent fibers of the fiber assembly are, for example, polyolefin resins (e.g., polyethylene, polypropylene, polymethylpentene, polyolefin resins with a structure in which a portion of the hydrocarbon is replaced with a cyano group or a halogen such as fluorine or chlorine), styrene, etc. resins, polyvinyl alcohol resins, polyether resins (e.g., polyether ether ketone, polyacetal, modified polyphenylene ether, aromatic polyether ketone, etc.), polyester resins (e.g., polyethylene terephthalate, polytrimethylene terephthalate, polybutylene) terephthalate, polyethylene naphthalate, polybutylene naphthalate, polycarbonate, polyarylate, fully aromatic polyester resin, etc.), polyimide resin, polyamide-imide resin, polyamide resin (e.g., aromatic polyamide resin, aromatic polyetheramide resin, nylon resin, etc.), resins with nitrile groups (e.g., polyacrylonitrile, etc.), urethane resins, epoxy resins, polysulfone resins (e.g., polysulfone, polyethersulfone, etc.), fluorine resins (e.g., polytetrafluorocarbon resins, etc.) ethylene, polyvinylidene fluoride, etc.), cellulose resins, polybenzimidazole resins, acrylic resins (e.g., polyacrylonitrile resins copolymerized with acrylic esters or methacrylic esters, copolymerized acrylonitrile with vinyl chloride or vinylidene chloride) It can be constructed using a known organic resin such as a modacrylic resin (modacrylic resin, etc.).

Note that these organic resins may be made of either a linear polymer or a branched polymer, and the organic resin may be a block copolymer or a random copolymer. There are no particular limitations on gender, regardless of gender. Furthermore, a mixture of multi-component organic resins may be used. Further, fibers prepared by kneading pigments or dyed fibers such as dyed fibers may be used.

In addition, when flame retardancy is required for the interior surface material, it is preferable that the constituent fibers of the fiber aggregate contain a flame-retardant organic resin. Examples of such flame-retardant organic resins include modacrylic resins, vinylidene resins, polyvinyl chloride resins, polyvinylidene fluoride resins, novoloid resins, polyclar resins, polyester resins copolymerized with phosphorus compounds, and copolymerized halogen-containing monomers. Examples include acrylic resins, aramid resins, and resins kneaded with halogen-based, phosphorus-based, or metal compound-based flame retardants. Furthermore, it may be an interior surface material that supports a flame retardant by using a binder or the like.

The constituent fibers can be produced by, for example, melt spinning, dry spinning, wet spinning, direct spinning (melt blowing, spunbond, electrostatic spinning, etc.), or by removing one or more resin components from composite fibers. It can be obtained by known methods such as a method of extracting fibers with a small fiber diameter and a method of obtaining split fibers by beating the fibers.

The constituent fibers may be composed of one type of organic resin or multiple types of organic resins. The fibers composed of a plurality of types of organic resins may be in a form generally referred to as a composite fiber, such as a core-sheath type, an island-in-the-sea type, a side-by-side type, an orange type, or a bimetal type.

Furthermore, the constituent fibers may include irregular cross-section fibers in addition to substantially circular fibers and elliptical fibers. In addition, the irregular cross-section fibers include hollow shapes, polygonal shapes such as triangular shapes, alphabetic character shapes such as Y-shapes, symbol-type shapes such as irregular shapes, multilobed shapes, and asterisk shapes, or multiple shapes of these shapes. The fibers may have a fiber cross section such as a bonded shape.

If the fiber aggregate contains heat-fusible fibers as constituent fibers, the fibers are heat-fused together to give strength and morphological stability to the fiber aggregate and suppress fuzzing and fiber scattering. It's good to be able to do it. Such heat-fusible fibers may be fully-fusible heat-fusible fibers or partially-fusible heat-fusible fibers such as the above-mentioned composite fibers. Also good. As a component exhibiting heat fusibility in the heat fusible fiber, for example, heat fusible fibers containing a low melting point polyolefin resin or a low melting point polyester resin can be appropriately selected and used.

It is preferable that the fiber aggregate contains crimpable fibers, as this increases elasticity and provides excellent mold followability. As such crimpable fibers, for example, crimpable fibers that have crimped latent crimpable fibers, fibers that have crimps, etc. can be used. Further, the fiber aggregate may include latent crimpable fibers that develop crimp when heated.

When the fiber aggregate is a fiber web or nonwoven fabric, for example, a dry method in which the fibers are intertwined by subjecting them to a carding device or an airlay device, or a method in which the fibers are dispersed in a solvent and formed into a sheet to intertwine the fibers. Wet method, direct spinning method (melt blow method, spunbond method, electrospinning method, method of spinning by discharging a spinning stock solution and a gas flow in parallel (for example, the method disclosed in JP 2009-287138A), etc.) It can be prepared by spinning fibers using a fiber and collecting the fibers.
A nonwoven fabric can be prepared by entangling and/or integrating the constituent fibers of the prepared fibrous web. Methods for entangling and/or integrating the constituent fibers include, for example, entangling them with needles or water jets, or subjecting the fiber web to heat treatment to bond or fuse the constituent fibers together using a binder or adhesive fibers. Examples include a method of integrating.

The method of heat treatment can be selected as appropriate, but for example, heating with a roll or heating and pressurizing, heating by applying to a heating device such as an oven dryer, far infrared heater, dry heat dryer, hot air dryer, etc., and heating using infrared rays under no pressure. A method of heating the contained organic resin by irradiating the organic resin can be used.

The type of binder that can be used is selected as appropriate, but examples include polyolefins (modified polyolefins, etc.), ethylene-vinyl alcohol copolymers, ethylene-acrylate copolymers such as ethylene-ethyl acrylate copolymers, various rubbers, and their derivatives ( Styrene-butadiene rubber (SBR), fluororubber, urethane rubber, ethylene-propylene-diene rubber (EPDM), etc.), cellulose derivatives (carboxymethyl cellulose (CMC), hydroxyethyl cellulose, hydroxypropyl cellulose, etc.), polyvinyl alcohol (PVA), polyvinyl Butyral (PVB), polyvinylpyrrolidone (PVP), polyurethane, epoxy resin, polyvinylidene fluoride (PVdF), vinylidene fluoride-hexafluoropropylene copolymer (PVdF-HFP), acrylic resin, etc. can be used.
If the binder contains an acrylic resin, it will soften appropriately during thermoforming such as heat press using a mold, so it is preferable to provide an interior surface material that has excellent conformability to the mold.
In addition to the above-mentioned resins, the binder may also contain additives such as flame retardants, fragrances, pigments, antibacterial agents, antifungal materials, photocatalyst particles, emulsifiers, dispersants, and surfactants.
The basis weight of the binder contained in the fiber aggregate is selected as appropriate. Specifically, the binder may have a basis weight of 2 g/m ² or more. Further, the basis weight of the binder can be 50 g/m ² or less, 30 g/m ² or less, and 20 g/m ² or less.

When the fiber aggregate is a woven or knitted fabric, the woven or knitted fabric can be prepared by weaving or knitting the fibers prepared as described above.

In addition to the fiber web, a fiber aggregate such as a nonwoven fabric, a woven fabric, or a knitted fabric may be subjected to the method of intertwining and/or integrating the constituent fibers described above.

The fineness of the constituent fibers of the fiber aggregate is not particularly limited, but may be 1 dtex or more, 1.5 dtex or more, 2 dtex or more so as to provide an interior surface material with excellent rigidity. can be. On the other hand, in order to obtain an interior surface material from which an interior material with excellent texture can be prepared, it can be 100 dtex or less, can be 50 dtex or less, can be 30 dtex or less, and can be 10 dtex or less. can.

Further, the fiber length of the constituent fibers of the fiber aggregate is not particularly limited, but from the viewpoint of rigidity, it can be 20 mm or more, 25 mm or more, and 30 mm or more. On the other hand, if the fiber length exceeds 110 mm, fiber aggregates tend to be formed during the preparation of the fiber aggregate, which may make it difficult to provide an interior surface material with excellent texture. Therefore, the fiber length should be 110 mm or less. The length can be 60 mm or less. Note that "fiber length" refers to a value measured according to JIS L1015 (2010), 8.4.1c) direct method (C method).

Various configurations of the fiber aggregate, such as thickness and basis weight, are not particularly limited and may be adjusted as appropriate.
The thickness of the fiber aggregate can be 0.5-5 mm, 1-3 mm, 1.1-1.9 mm. In the present invention, the thickness refers to the length in the vertical direction when a compressive load of 20 g/cm ² is applied in the direction perpendicular to the main surface.
Further, the basis weight of the fiber aggregate can be, for example, 50 to 500 g/m ² , 80 to 300 g/m ² , or 100 to 250 g/m ² . In addition, in the present invention, the basis weight refers to the mass per 1 m ² on the surface (principal surface) having the widest area of the object to be measured.

The term "print" as used in the present invention refers to a layer containing a print resin that is present on at least one main surface of a fiber aggregate. Furthermore, in the interior surface material of the present invention, the print contains particles. The printing resin constituting the print is a resin that can play the role of supporting particles on at least one main surface of the fiber aggregate, and the same resin as the binder described above can be used. In particular, the print resin that makes up the print contains acrylic resin because it softens appropriately during thermoforming using a mold, such as a heat press, and can provide an interior surface material that has excellent conformability to the mold. It is preferable that the print resin be made of acrylic resin, and it is more preferable that the printing resin constituting the print is only acrylic resin.

In addition, so that it is clear that the print exists discontinuously on the main surface of the interior surface material, the main surface of the interior surface material where the print exists (for example, the side where the print exists in the fiber aggregate) It is desirable that the interior surface material has a different color for the main surface (main surface) and print color.

The components constituting the particles, the shape of the particles, etc. can be selected as appropriate. The components constituting the particles may be organic resins or inorganic components such as silica, which are exemplified as being capable of constituting the constituent fibers of the fiber aggregate.
The shape of the particles can be spherical, approximately spherical such as an ellipsoid, fibrous, polygonal, irregularly shaped, etc., but the ability to uniformly disperse the particles during printing improves design. Preferably, the particles are spherical or approximately spherical, since it is possible to provide an interior surface material with excellent tactility.
The average particle diameter of the particles can be selected as appropriate depending on the desired design and tactile sensation, but the non-patent document ``Shinichi Watanabe et al., ``Recognition and language evaluation of particle groups by tactile sensation'', Journal of the Japan Society for Precision Engineering, Publication date: November 2005 , Vol. Based on the knowledge that particles with an average particle diameter of 106 μm and particles with a smaller average particle diameter are easily caught in human fingerprints, the presence of the particles disclosed in 71, PP 1421-1425. It is preferable to use particles having an average particle diameter of 106 μm or less because it is easy to provide an interior surface material having a main surface with an excellent slimy feel and excellent tactility.
The smaller the average particle diameter of the particles, the more easily they can penetrate into human finger prints and be caught in human finger prints, so it is preferable that the average particle diameter is 106 μm or less. Although the lower limit of the average particle diameter can be selected as appropriate, it is realistically 30 μm or more. Furthermore, according to the above-mentioned non-patent literature, if the average particle diameter of the particles is too small, the sensation felt by a person when touching the particles exposed on the main surface becomes dull, resulting in an effect of improving the tactile sensation. It is preferable that the average particle diameter of the particles is larger than 35 μm since there is a possibility that the particle size may be unintentionally lowered.
In addition, in the present invention, the average particle diameter of particles refers to a value calculated by the following method.
(Method of calculating average particle diameter)
(1) Take a 200x optical microscope photograph of multiple particles placed in a room temperature (25°C) atmosphere, or 200x of both principal surfaces of an interior surface material placed in a room temperature (25°C) atmosphere. Take optical micrographs of each.
(2) Randomly select 10 particles from among the photographed photographs in which the presence of particles is recognized.
(3) Calculate the particle diameter of each of the ten selected particles, and set the average value of the calculated values as the average particle diameter. The diameter of a circle having the same area as the particle in the photograph is calculated, and the value of the diameter is regarded as the particle diameter of the particle.

The coefficient of variation in the particle diameter of the particles contained in the print (hereinafter sometimes abbreviated as CV value) can be selected as appropriate, but the smaller the CV value, the narrower the distribution of particles, and the better the design and tactility. It is possible to efficiently provide an interior surface material with excellent properties as intended. Therefore, the CV value of the particle size is preferably 17% or less, and preferably 16% or less. Note that the lower limit of the CV value for the particle diameter of the particles can be selected as appropriate, but ideally it is 0%.
The particles may be either solid particles or hollow particles, but when a person touches the main surface, the particles in the print tend to deform in the direction of the particle diameter, making it possible to create interior surface materials with a slimy feel and excellent tactility. It is preferable to employ hollow particles because they are easy to provide. In addition, when the particles are hollow particles, it is preferable that the components constituting the hollow particles contain an organic resin so that the hollow particles are easily deformed in the particle diameter direction. Moreover, when hollow particles having a structure containing an organic resin and an inorganic component are employed as the hollow particles, it becomes easier to prepare a coating liquid in which the hollow particles are uniformly dispersed in a dispersion medium. As a result, by using the coating liquid, it is possible to efficiently provide an interior surface material with excellent design and tactility as intended by providing a print in which hollow particles are uniformly distributed, which is preferable.

Furthermore, if the hollow particles unintentionally expand during the heating step in the preparation process of the interior surface material, it may be difficult to provide the interior surface material with the intended print. Therefore, it is preferable to use hollow particles whose particle size does not change easily within the heating temperature range in the preparation process of interior surface materials. Specifically, the particle size does not change even at a heating temperature of 150°C in an atmosphere. It is preferable that the hollow particles are difficult to form.
The coefficient of thermal expansion of hollow particles is the average of hollow particles that can constitute interior surface materials or hollow particles collected from interior surface materials under heating temperature (150°C) atmosphere and room temperature (25°C) atmosphere. It can be calculated from each value of particle diameter. In other words, the coefficient of thermal expansion of the hollow particles is calculated by calculating the percentage of the average particle diameter of the hollow particles under a heating temperature (150°C) atmosphere to the average particle diameter of the hollow particles under a room temperature (25°C) atmosphere. be able to. Specifically, hollow particles with a coefficient of thermal expansion close to 100% (80% or more and 120% or less, preferably 85% or more and 115% or less) are preferable.

Specific examples of hollow particles that satisfy the above-mentioned physical properties and are suitable for forming the interior surface material of the present invention include MFL-81GTA, MFL-81GCA, MFL-SEVEN, MFL-HD30CA, and MFL- manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd. Examples include HD60CA, MFL-100MCA, and MFL-110CAL. These hollow particles are hollow microspheres made of an acrylonitrile copolymer whose surfaces are coated with an inert inorganic powder (eg, calcium carbonate, talc, titanium oxide).

The manner in which the print contains particles can be selected as appropriate, and may be an aspect in which particles are present only on the main surface of the print, or an aspect in which particles are present inside and on the main surface of the print.
Examples of modes in which particles are present on the main surface of the print include a mode in which the particles are adhesively supported on the main surface of the print by printing resin, and a mode in which particles partially sink into the main surface of the print. For example, it may be supported by A portion of the particles may be exposed on the main surface of the print.

The print may contain many types of particles, but in order to provide an interior surface material with a more excellent tactile sensation, such as a high moist feeling by giving a sense of resistance and sliminess, it is preferable to use the above-mentioned structure as particles. Preferably, the interior surface has a print containing only hollow particles. In particular, in order to provide an interior surface material that efficiently exhibits the above-mentioned effects, it is more preferable that the interior surface material is provided with a print containing only one type of hollow particles according to the present invention as particles.

The amount of particles contained in the print is selected appropriately, but can be up to 15 g/m ² , can be up to 12 g/m ² , can be up to 9 g/m ² . On the other hand, the lower limit of the content is adjusted as appropriate, but it is preferably more than 0.1 g/m ² and more than 0.3 g/m ² so that an interior surface material having the characteristics according to the present invention can be provided. A large number is preferable.

Although the percentage of the solid content of the particles relative to the solid content of the print resin constituting the print can be adjusted as appropriate, it is preferably greater than 25% by mass. When the percentage is more than 25% by mass, it gives people a sense of high moistness due to a sense of resistance and sliminess, and it is possible to provide an interior surface material with a more excellent tactile feel. Therefore, the percentage is preferably 28% by mass or more, preferably more than 28% by mass, preferably 30% by mass or more, preferably more than 30% by mass, and 35% by mass or more. The amount is preferably 40% by mass or more. Further, the upper limit of the percentage can be selected as appropriate, and can be 400% by mass or less, 200% by mass or less, and 100% by mass or less.
Note that the percentage of the solid content mass of the particles relative to the solid content mass of the print resin constituting the print can be calculated by rounding off the value calculated by the following method to the nearest whole number.
A=100×B/C
A: Percentage of solid content mass of particles to solid content mass of print resin constituting the print (unit: mass %)
B: Solid mass of particles composing the print (unit: g/m ² )
C: Solid mass of print resin constituting the print (unit: g/m ² )

In addition, if it is difficult to measure the solid mass of the particles and print resin that make up the print included in the interior surface material, it may be necessary to The print is constructed by substituting the solid content mass of the particles applied on one main surface of the fiber aggregate into the above equation as B, and substituting the solid content mass of the print resin into the above equation as C. The percentage (unit: mass %) of the solid content mass of the particles with respect to the solid content mass of the printing resin to be used is calculated. Alternatively, the solid mass of particles in a coating liquid containing print resin and particles constituting a print, which is applied on one main surface of a fiber aggregate to constitute a print in the manufacturing process of interior surface materials. By substituting B into the above equation and the solid mass of the print resin into the above equation, the solid mass of the particles is calculated as a percentage of the solid mass of the print resin constituting the print (unit: mass). %).

In addition to the print resin and particles, prints contain additives such as flame retardants, fragrances, pigments, antibacterial agents, anti-mold materials, photocatalyst particles, emulsifiers, dispersants, surfactants, and thickeners. You can leave it there.

The interior surface material of the present invention is characterized in that the print is discontinuously present on the main surface of the interior surface material. "Discontinuous" here means a state in which all the prints present on the main surface of the interior surface material are not in contact with each other. In other words, it means a state in which a print is present on the main surface of the interior surface material, the peripheral outline of which is formed by a portion where no print exists. As a specific example, a mode in which a print exists in the form of a leather texture pattern, a dot-like pattern, etc. can be exemplified. On the other hand, if the print exists so as to cover the entire main surface of the interior surface material (if the print is a solid print), the print exists continuously on the main surface of the interior surface material. It is something that exists.

The interior surface material according to the present invention is an interior surface material with a print that is discontinuously present on the main surface, so that it cannot be used when subjected to thermoforming such as a heat press using a mold. This can prevent cracks from occurring in the print. As a result, the secondary effect is that interior materials with excellent design and tactility can be easily provided. On the other hand, when an interior surface material having a print that covers the entire main surface is subjected to thermoforming such as a heat press using a mold, cracks are likely to occur in the print. As a result, it is difficult to provide interior materials with excellent design and tactility.
Note that the print may include a layer containing one type of printing resin, or may include a layer containing multiple types of printing resin. Moreover, the interior surface material may be provided with one layer containing these printed resins, or may be provided with a plurality of layers containing these printed resins. As a specific example, a plurality of prints with the same or different patterns, print resins, and inclusions may be provided.

Note that as long as the print is present on one main surface of the fiber aggregate, the print may be present on both main surfaces of the fiber aggregate, and the print may be present on all exposed surfaces of the fiber aggregate. You can leave it there. In addition to the embodiment in which the print is present only on the main surface of the fiber aggregate, it may also be in an embodiment in which a part of the components constituting the print penetrates between the constituent fibers that constitute the fiber aggregate.

The basis weight of the print is appropriately selected, and can be, for example, 0.5 to 50 g/m ² , or 1 to 30 g/m ² .

The surface roughness (SMD) of the main surface on the side where the print is present in the interior surface material of the present invention is 2.75 μm or more. Note that surface roughness (SMD) is a value measured using a surface testing machine (KES-FB4, manufactured by Kato Tech Co., Ltd.). The roughness contactor (0.5 mm wire, contact surface width: 5 mm) was brought into contact with the sample by applying a load of 10.0 g, and the sample was moved at a rate of 1 mm/sec. It means the average deviation of surface roughness data measured by moving at a speed of .mu.m.
Surface roughness is literally an index showing the unevenness of the main surface, that is, the smoothness of the main surface. The present inventor has proposed that in an interior surface material provided with the print according to the present invention on the main surface, when the surface roughness (SMD) of the main surface on the side where the print is present is 2.75 μm or more, the design We have discovered that it is possible to provide an interior surface material with excellent texture and texture.
The larger the surface roughness (SMD) value, the smaller the gap tends to be, making it easier to provide interior surface materials with excellent design and tactility. It is preferable that Note that the upper limit of the surface roughness (SMD) is not particularly limited. However, if the surface roughness (SMD) is an excessively high value, a new gap will occur between the tactile sensation implanted by an illusion and unconsciously imagined, and the tactile sensation actually obtained by touching the main surface. Therefore, the surface roughness (SMD) is preferably 4.5 μm or less.

In addition to the surface roughness (SMD), the main surface on the side where the print is present in the interior surface material of the present invention has a mean coefficient of friction (MIU) and The value of variation in coefficient of friction (MMD) can be adjusted as appropriate.

The average coefficient of friction (MIU) is an index indicating the flexibility of the main surface. Note that the average friction coefficient (MIU) is the average value of μ in a distance of 20 mm of μ (friction coefficient) measured using a surface testing machine (KES-FB4). , which means an average value measured under the same conditions as the conditions for measuring the variation in average coefficient of friction (MMD) described below.
The higher the average coefficient of friction (MIU) of the main surface of the interior surface material on the side where the print is present, the more flexible the main surface tends to be and the better the tactile feel. (MIU) is preferably 0.27 or more, preferably 0.30 or more, and more preferably 0.34 or more. On the other hand, if the value of the average coefficient of friction (MIU) is too large, the frictional resistance will be too strong and the tactile sensation may be impaired, so it is preferably 1.6 or less.

The variation in the mean coefficient of friction (MMD) is an indicator of the uniformity of the main surface. Fluctuations of average friction coefficient (MMD) is a value measured using a surface testing machine (KES-FB4), and a surface material sample (20 cm square) was placed in the test machine with a load of 400 g. The friction element (10 mm x 10 mm) was applied with a load of 50 g and brought into contact with the sample, and the sample was moved at a rate of 1 mm/sec. means the average deviation of μ (friction coefficient) measured by moving at a speed of .
The smaller the variation in the average coefficient of friction (MMD) of the main surface of the interior surface material on the side where the print is present, the more uniform the main surface is. Although the value is adjusted as appropriate, the variation in the average coefficient of friction (MMD) can be in the range of 0 to 0.070, can be in the range of 0.010 to 0.060, and can be in the range of 0.010 to 0.060. 0.015 to 0.050.

Although the thickness of the interior surface material is selected as appropriate, it can be 2.5 mm or less, 2.0 mm or less, and 1.4 mm or less. On the other hand, although the lower limit of the thickness is adjusted as appropriate, it is realistically 0.5 mm or more.
Although the basis weight of the interior surface material is appropriately selected, it can be 300 g/m ² or less, and 250 g/m ² or less. On the other hand, although the lower limit of the basis weight is adjusted as appropriate, it is realistically 100 g/m ² or more.
The air permeability of the interior surface material is selected appropriately, but the air permeability should be 5 cm ³ /cm ² s or more so that the interior surface material can be provided in a wide range of frequency ranges where sound absorption effects are expected. can. Although the upper limit value can be selected as appropriate, the air permeability can be 60 cm ³ /cm ² ·s or less so as to have a rich sound absorption effect. Note that this "air permeability" refers to a value measured by JIS L1913:2010 "General Nonwoven Fabric Testing Method" 6.8.1 (Fragile method).

The interior surface material of the present invention may further include other constituent members such as porous bodies, films, and foams.

Next, a method for manufacturing an interior surface material of the present invention will be explained. Note that descriptions of items having the same configuration as those described for the interior surface material described above will be omitted.
Although the manufacturing method of the interior surface material according to the present invention can be selected as appropriate, as an example,
(1) Step of preparing a fiber aggregate;
(2) A step of preparing a coating liquid by mixing a resin and particles capable of forming a print in a solvent or a dispersion medium;
(3) a step of applying a coating liquid so that the print is discontinuously present on one main surface of the fiber aggregate;
(4) removing the solvent or dispersion medium by heating the fiber aggregate to which the coating liquid has been applied;
A method for producing an interior surface material may be mentioned.

First, (1) the step of preparing a fiber aggregate will be explained.
As the fiber aggregate, for example, a sheet-like fabric such as a fiber web, a nonwoven fabric, a woven fabric, or a knitted fabric is prepared. The fineness and fiber length of the constituent fibers in the fiber aggregate, the thickness and basis weight of the fiber aggregate can be those having the above-mentioned values.

Next, (2) a step of preparing a coating liquid by mixing a resin and particles capable of forming a print in a solvent or a dispersion medium will be explained.
The type of solvent or dispersion medium can be selected as appropriate, but in order to suitably apply the coating liquid onto one main surface of the fiber aggregate, it must be able to dissolve the resin that can form the print and also be able to disperse the particles without dissolving them. It is preferable to use a solvent or a dispersion medium in which the resin particles that can form the print and the particles can be dispersed without being dissolved. In addition to particles, the coating solution may also dissolve or disperse and contain additives such as flame retardants, fragrances, pigments, antibacterial agents, antifungal materials, photocatalyst particles, emulsifiers, dispersants, and surfactants. You can.

Then, (3) the step of applying the coating liquid so that the print is discontinuously present on one main surface of the fiber aggregate will be explained.
The method of applying the coating liquid to one main surface of the fiber aggregate can be selected as appropriate, but it is possible to apply the coating liquid to one main surface of the fiber aggregate discontinuously by printing, either as it is or in a foamed state. A method of applying the coating liquid to one main surface of the fiber aggregate discontinuously using a printer, etc. can be adopted. Note that one type of coating liquid or a plurality of types of coating liquids may be applied. Furthermore, when applying multiple types of coating liquids, the manner in which each coating liquid is applied (pattern, composition of the coating liquid) may be different.
Furthermore, (4) the step of removing the solvent or dispersion medium by heating the fiber aggregate to which the coating liquid has been applied will be explained.
The method for removing the solvent or dispersion medium can be selected as appropriate, but examples include heating the product by heating it in a heating device such as an oven dryer, far-infrared heater, dry heat dryer, or hot air dryer, or leaving it still at room temperature or under a reduced pressure atmosphere. The solvent or dispersion medium can be removed by evaporation. The heating temperature when removing the solvent or dispersion medium is a temperature that allows the solvent or dispersion medium to volatilize, and the heating temperature is set at a temperature that allows the solvent or dispersion medium to volatilize, and at the same time, the heating temperature is set so that the shape and function of constituent members such as fiber aggregates and particles will not be unintentionally deteriorated. Select the upper temperature limit.
In addition, when the fiber aggregate is a fiber web, the constituent fibers are adhered to each other by this step (4) (bonded with a molten binder, or bonded by melting the thermoplastic component contained in the constituent fibers). A nonwoven fabric may also be formed.

By using the above-described manufacturing method, the interior surface material according to the present invention can be manufactured.
The method for manufacturing interior surface materials described above includes a step of laminating other structural members such as porous bodies, films, and foams, and a step of processing by punching out shapes according to the purpose and manner of use. The method for producing an interior surface material may include various secondary steps.
Further, the main surface on the print side may be subjected to a pressure treatment such as Reliant press treatment to make the surface smooth.

Furthermore, a resin layer may be provided on the main surface of the interior surface material according to the present invention on the side where the print is present. The type of resin can be selected as appropriate, and organic resins that are exemplified as capable of forming the constituent fibers of the fiber assembly can be used. If the resin layer contains an acrylic resin, it will soften appropriately during thermoforming such as heat press using a mold, so it is preferable to provide an interior surface material that has excellent conformability to the mold.
Note that the resin layer may be formed continuously on the main surface or may be formed discontinuously.
The resin layer may also contain additives such as flame retardants, fragrances, pigments, antibacterial agents, antifungal materials, photocatalyst particles, emulsifiers, dispersants, and surfactants. In addition, the color of the resin layer and the color of the print are different (preferably with a transparent resin layer) so that the effect of improving the design and tactility of the interior surface material due to the presence of the print can be efficiently exhibited. , it is desirable that it is clear that the prints are discontinuous.
The basis weight of the resin layer can be adjusted as appropriate, but it can be from 2 g/m ² to 80 g/m ² , from 5 g/m ² to 55 g/m ² , and from 10 g/m ² to 30 g/m ^2. Something can happen.

In addition, when the interior surface material according to the present invention is provided with a resin layer, the characteristics of the main surface such as surface roughness (SMD) are different from the main surface of the exposed resin layer in the interior surface material. It can be evaluated by performing various measurements.

EXAMPLES Hereinafter, the present invention will be specifically explained with reference to Examples, but these are not intended to limit the scope of the present invention.

(Preparation of fiber aggregate)
Various binder-bonded nonwoven fabrics, which are fiber aggregates, were prepared in the following manner.
Binder adhesive nonwoven fabric A
Using 100% spun-dyed polyester fiber (fineness: 2.2 dtex, fiber length: 38 mm), the fibers were opened using a card machine to form a fiber web, and then needle punched from one side at a needle density of 400 needles/ ^m2 . A needle-punched nonwoven fabric was prepared by applying the fabric between hot rolls.
Next, from the side opposite to the needled side of the needle-punched nonwoven fabric, a foamed binder liquid A mixed in the proportions described below is applied, and after being applied between rolls having a gap, the temperature is By drying in a can dryer at 160°C, binder-bonded nonwoven fabric A (fabric weight: 182 g/m ² , binder amount: 2 g/m ² , nonwoven fabric in which all constituent fibers are randomly entangled) is obtained as a fiber aggregate. Prepared.
Binder liquid A
・Acrylic ester resin emulsion (Tg of acrylic ester resin: -40°C, solid content mass of acrylic ester resin emulsion: 50% by mass): 2.3 parts ・Thickener: 0.2 part ・Surfactant : 0.2 parts, 25% ammonia water: 0.1 parts, water: 97.2 parts

Binder-adhesive nonwoven fabric B
Using 100% spun-dyed polyester fiber (fineness: 2.2 dtex, fiber length: 38 mm), the fibers were opened using a card machine to form a fiber web, and then needle punched from one side at a needle density of 400 needles/ ^m2 . A needle-punched nonwoven fabric was prepared by applying the fabric between hot rolls.
Next, from the opposite side of the needle-punched nonwoven fabric to the needled side, binder liquid B mixed in the proportions described below is applied in a foamed state, and after being applied between rolls having a gap, the temperature is By drying in a can dryer at 160°C, binder-bonded nonwoven fabric B (fabric weight: 180 g/m ² , binder amount: 12 g/m ² , nonwoven fabric in which all constituent fibers are randomly entangled) is obtained as a fiber aggregate. Prepared.
Binder liquid B
・Acrylic ester resin emulsion (Tg of acrylic ester resin: -40°C, solid content mass of acrylic ester resin emulsion: 50% by mass): 13 parts ・Thickener: 0.3 part ・Surfactant: 0 .2 parts 25% ammonia water: 0.1 part Water: 86.4 parts

(Preparation of printing liquid)
Various printing liquids were prepared containing the following proportions. The hollow particles blended into the printing liquid were hollow particles made of an organic resin with an inorganic component present around the outer periphery.
Print liquid A
- Acrylic ester resin emulsion (Tg of acrylic ester resin: -40°C, solid content mass of acrylic ester resin emulsion: 50 mass%): 10 parts - Thickener (solid content mass: 1.5 mass%) : 30 parts・Defoaming agent (solid content: 40% by mass): 0.4 parts・Hollow particles (Matsumoto Microsphere (registered trademark) MFL-100MCA, Matsumoto Yushi Pharmaceutical Co., Ltd., coefficient of thermal expansion: 112.3 %, solid content mass of hollow particles: 100 mass%): 2 parts, pigment (solid content mass: 3.8 mass%): 4 parts, 25% ammonia water: 1 part, water: 52.6 parts. In the print liquid, the mass (solid content) of hollow particles/mass (solid content) of acrylic acid ester resin was 40% by mass.

Print liquid B
- Acrylic ester resin emulsion (Tg of acrylic ester resin: -40°C, solid content mass of acrylic ester resin emulsion: 50 mass%): 10 parts - Thickener (solid content mass: 1.5 mass%) : 30 parts・Defoaming agent (solid content: 40% by mass): 0.4 parts・Hollow particles (Matsumoto Microsphere (registered trademark) MFL-100MCA, Matsumoto Yushi Pharmaceutical Co., Ltd., coefficient of thermal expansion: 112.3 %, solid content mass of hollow particles: 100 mass%): 2 parts, pigment (solid content mass: 3.8 mass%): 0.14 parts, 25% ammonia water: 1 part, water: 56.46 parts. In this print liquid, the percentage of the mass (solid content) of the hollow particles relative to the mass (solid content) of the acrylic acid ester resin was 40% by mass.

Print liquid C
- Acrylic ester resin emulsion (Tg of acrylic ester resin: -40°C, solid content mass of acrylic ester resin emulsion: 50% by mass): 6.5 parts - Thickener (solid content mass: 1.5 mass %): 30 parts・Defoaming agent (solid content mass: 40 mass%): 0.4 parts・Hollow particles (Matsumoto Microsphere (registered trademark) MFL-100MCA, Matsumoto Yushi Pharmaceutical Co., Ltd., coefficient of thermal expansion: 112 .3%, solid content mass of hollow particles: 100 mass%): 1.3 parts, pigment (solid content mass: 3.8 mass%): 3 parts, 25% ammonia water: 1 part, water: 57.8 Incidentally, in this print liquid, the percentage of the mass (solid content) of the hollow particles relative to the mass (solid content) of the acrylic acid ester resin was 40% by mass.

(Preparation of resin liquid)
Various resin liquids were prepared in the following proportions.
Resin liquid A
- Acrylic ester resin emulsion (Tg of acrylic ester resin: -5°C, solid content mass of acrylic ester resin emulsion: 45% by mass): 40 parts - Thickener A (solid content mass: 1.5% by mass) ): 20 parts - Thickener B (solid content: 28% by mass): 1 part - Antifoaming agent (solid content: 14% by mass): 0.5 part - Pigment (solid content: 40% by mass) : 3 parts, crosslinking agent (solid content: 40% by mass): 2 parts, 25% ammonia water: 1 part, water: 32.5 parts

Resin liquid B
- Acrylic ester resin emulsion (Tg of acrylic ester resin: -40°C, solid content mass of acrylic ester resin emulsion: 50% by mass): 20 parts - Thickener A (solid content mass: 1.5% by mass) ): 28 parts・Thickener B (solid content mass: 28 mass%): 3 parts・Defoaming agent (solid content mass: 40 mass%): 0.4 parts・25% ammonia water: 1 part・Water: 47.6 copies

Resin liquid C
- Acrylic ester resin emulsion (Tg of acrylic ester resin: -40°C, solid content mass of acrylic ester resin emulsion: 50% by mass): 20 parts - Thickener A (solid content mass: 1.5% by mass) ): 20 parts・Thickener B (solids mass: 28% by mass): 1 part・Defoaming agent (solids mass: 40% by mass): 0.4 parts・Pigment (solids mass: 38% by mass) : 1.6 parts, crosslinking agent (solid content: 40% by mass): 1 part, 25% ammonia water: 1 part, water: 55 parts

(Comparative example 1)
After applying printing liquid A using a cylinder to the entire surface of the binder-coated surface of binder-adhesive nonwoven fabric A, drying it with a dryer at a temperature of 140°C will coat the entire surface of one main surface of binder-adhesive nonwoven fabric A. Covering interior surface material with (solid printing) print derived from print liquid A (basis weight: 202 g/m ² , thickness: 1.4 mm, air permeability: 64.5 cc/cm ² /sec, print basis weight: 20 g/m ² , average particle diameter of hollow particles: 73.0 μm, CV value: 8.4%).
In addition, when the interior surface material prepared in this way was visually observed, it was confirmed that a print was continuously present (solid printing) covering the entire surface of one main surface.

(Comparative example 2)
After applying printing liquid B to the entire binder-coated surface of binder-adhesive nonwoven fabric A in a skin texture pattern using a cylinder, drying with a dryer at a temperature of 140°C, one main surface of binder-adhesive nonwoven fabric A is Interior surface material with a discontinuous print derived from printing liquid B (printed with a leather grain pattern shown in Figure 1) on the entire surface (fabric weight: 194 g/m ² , thickness: 1.6 mm) , air permeability: 70.1 cc/cm ² /sec, print area weight: 12 g/m ² , average particle diameter of hollow particles: 73.0 μm, CV value: 8.4%).
In addition, when the interior surface material prepared in this way was visually observed, it was confirmed that the print was discontinuously present on one main surface side.

(Example 1)
A print derived from printing liquid A discontinuously present on the entire surface of one main surface of binder-adhesive nonwoven fabric A was produced in the same manner as in Comparative Example 2, except that printing liquid A was used instead of printing liquid B. (printed with the leather texture pattern shown in Figure 1), interior surface material (fabric weight: 194 g/m ² , thickness: 1.4 mm, air permeability: 68.6 cc/cm ² /sec, printed fabric weight : 12 g/m ² , average particle diameter of hollow particles: 73.0 μm, CV value: 8.4%).
In addition, when the interior surface material prepared in this way was visually observed, it was confirmed that the print was discontinuously present on one main surface side.

(Comparative example 3)
For the interior surface material prepared in Comparative Example 1, resin liquid A was applied to the entire main surface of the printed side using a cylinder in a skin texture pattern, and then heated at a temperature of 140°C. By drying with a dryer, a discontinuous resin layer derived from resin liquid A was provided on the entire main surface of the interior surface material on the printed side (as shown in Figure 1). Textured pattern printed) interior surface material (basis weight: 218 g/m ² , thickness: 1.4 mm, air permeability: 32.6 cc/cm ² /sec, printed fabric weight: 20 g/m ² , average particle size of hollow particles) A diameter: 73.0 μm, a CV value: 8.4%, and a resin layer basis weight: 16 g/m ² ) were prepared.
In addition, when the interior surface material prepared in this way was visually observed, it was confirmed that the print was discontinuously present on one main surface side.

The printing aspect of the interior surface materials prepared in Comparative Examples and Examples and the physical properties of the interior surface materials are summarized in Table 1. In addition, "-" is written for items that do not exist.
Further, in the columns of "Touch" and "Moldability", the results of subjecting interior surface materials to the following evaluation methods are listed.

(Tactile evaluation method)
After visually confirming the main surface of the prepared interior surface material on the side where the print was present, the tactile sensation when touching the main surface was evaluated using a monitor. In addition, based on the tactile sensation felt when touching the main surface of Comparative Example 1, if the tactile sensation was evaluated as being equally good or more tactile, "〇" was given. Items that were evaluated as inferior were marked with an "x".

(Evaluation method of moldability)
1. A base material was prepared by laminating a glass sheet, urethane foam, glass sheet, and polyethylene terephthalate film in this order.
2. The prepared interior surface material was laminated on the main surface of the base material on the side where the polyethylene terephthalate film was exposed. At this time, the main surface and the main surface of the interior surface material on the side where the print is not present were faced and brought into contact with each other and laminated.
3. The interior surface material and the base material are stacked and sandwiched between a pair of upper and lower molds, and after being formed by heat pressing (molding temperature: 130°C) by applying heat and pressure, the interior material is cooled and molded. was prepared.
4. The main surface of the prepared interior material on the side where the print was present was visually observed. As a result of visual observation, if there were no cracks in the print, it was marked with "O", and if there were cracks in the print, it was marked with "x".

From the results of comparing Comparative Examples 1 to 3 and Example 1, it was found that prints containing particles existed discontinuously on the main surface, and that the main surface of the interior surface material on the side where the print was present It has been found that an interior surface material with excellent tactility can be provided when the surface roughness (SMD) of the material is 2.75 μm or more.

In addition, from the results of comparing Example 1 and Comparative Example 3, the superiority of the tactile sensation depends only on whether the surface roughness (SMD) of the main surface that is touched by people in the interior surface material is 2.75 μm or more. Rather, it has been found that it also depends on whether the layers of the print containing the particles are discontinuous or not.
In addition, from the results of comparing Comparative Example 1 and Example 1, it was found that the discontinuous presence of prints containing particles on the main surface prevents cracks from occurring in the prints and improves interior materials. It has been found that it is possible to provide an interior surface material that can be prepared and has excellent moldability.

(Comparative example 4)
For the interior surface material prepared in Comparative Example 2, resin liquid B was applied to the entire main surface of the side where the print was present using a cylinder, and then dried with a dryer at a temperature of 140 ° C. As a result, an interior surface material (fabric weight: 206 g/m ² ) equipped with a resin layer derived from resin liquid B (solid printing) covering the entire main surface of the interior surface material on the side where the print is present, Thickness: 1.6 mm, air permeability: 64.1 cc/cm ² /sec, print area weight: 20 g/m ² , average particle diameter of hollow particles: 73.0 μm, CV value: 8.4%, resin layer Fabric weight: 12 g/m ² ) was prepared.
In addition, when the interior surface material prepared in this way was visually observed, it was confirmed that the print was discontinuously present on one main surface side.

(Example 2)
Resin liquid C was applied using a cylinder to the entire main surface of the interior surface material prepared in Example 1 on the side where the print was present, and then dried with a dryer at a temperature of 140°C. As a result, an interior surface material (fabric weight: 206 g/m ² ) equipped with a resin layer derived from resin liquid C (solid printing) covering the entire main surface of the interior surface material on the side where the print is present, Thickness: 1.4 mm, air permeability: 60.4 cc/cm ² /sec, print area weight: 12 g/m ² , average particle diameter of hollow particles: 73.0 μm, CV value: 8.4%, resin layer Fabric weight: 12 g/m ² ) was prepared.
In addition, when the interior surface material prepared in this way was visually observed, it was confirmed that the print was discontinuously present on one main surface side.

The printing aspect of the interior surface materials prepared in Comparative Examples and Examples and the physical properties of the interior surface materials are summarized in Table 2. In addition, "-" is written for items that do not exist. In addition, the results of Comparative Example 2 and Example 1 are also described for easy understanding.

From the results of comparing Example 1 and Example 2, whether or not the print is exposed on the main surface of the interior surface material does not directly affect whether or not the interior surface material has an excellent tactile feel. It has been found.

(Example 3)
After applying printing liquid C to the entire binder-coated surface of binder-adhesive nonwoven fabric B in a skin texture pattern using a cylinder, one main surface of binder-adhesive nonwoven fabric B is dried by using a dryer at a temperature of 140°C. An interior surface material with a print derived from print liquid C discontinuously present on the entire surface (printing the leather grain pattern shown in Figure 1) (basis weight: 192 g/m ² , print basis weight: 12 g/ m ² ) was prepared.
After applying resin liquid C using a cylinder to the entire main surface of the interior surface material prepared in this way on the side where the print is present, dry it with a dryer at a temperature of 140°C. As a result, an interior surface material (fabric weight: 204 g/m ² ) equipped with a resin layer derived from resin liquid C (solid printing) covering the entire main surface of the interior surface material on the side where the print is present, Thickness: 1.5 mm, air permeability: 58.5 cc/cm ² /sec, print basis weight: 12 g/m ² , average particle diameter of hollow particles: 73.0 μm, CV value: 8.4%, resin layer Fabric weight: 12 g/m ² ) was prepared.
In addition, when the interior surface material prepared in this way was visually observed, it was confirmed that the print was discontinuously present on one main surface side.

(Example 4)
For the interior surface material prepared in Example 3, resin liquid B was further applied to the entire main surface on the side where the resin layer was present using a cylinder, and then treated with a dryer at a temperature of 140°C. By drying, the interior surface material (fabric weight: 216 g/m) is provided with a resin layer derived from resin liquid B (solid printing) that covers the entire main surface of the interior surface material on the side where the print is present. ² , Thickness: 1.5mm, Air permeability: 38.9cc/cm ² /sec, Print basis weight: 12g/m ² , Average particle diameter of hollow particles: 73.0μm, CV value: 8.4%, Resin A total basis weight of the layer: 24 g/m ² ) was prepared.
In addition, when the interior surface material prepared in this way was visually observed, it was confirmed that the print was discontinuously present on one main surface side.

(Example 5)
Printing liquid A was used instead of printing liquid C. Also, using a cylinder, printing liquid A was applied in a dot-like pattern (dots with a diameter of 1 mm were arranged randomly at 37 dots/ ^cm2) . An interior surface material (fabric weight: 207 g/m ² , thickness: 1.4 mm, ventilation degree: 29.1 cc/cm ² /sec, print area weight: 3 g/m ² , average particle diameter of hollow particles: 73.0 μm, CV value: 8.4%, total area weight of resin layer: 24 g/m ² ) was prepared.
In addition, when the interior surface material prepared in this way was visually observed, it was confirmed that the print was discontinuously present on one main surface side.

(Example 6)
Using a cylinder, print liquid A was applied to form a dot-like pattern different from that of Example 5 (dots with a diameter of 0.5 mm are regularly arranged at 112 dots/cm ² , and the print liquid A is An interior surface material (fabric weight: 205 g/m ² , thickness: 1.4 mm, air permeability: 39.31 cc/ cm ² /sec, printed area weight: 1 g/m ² , average particle diameter of hollow particles: 73.0 μm, CV value: 8.4%, total area weight of resin layer: 24 g/m ² ).
In addition, when the interior surface material prepared in this way was visually observed, it was confirmed that the print was discontinuously present on one main surface side.

(Example 7)
After applying printing liquid C to the entire binder-coated surface of binder-adhesive nonwoven fabric B in a discontinuous pattern as shown in FIG. 2 using a cylinder, drying with a dryer at a temperature of 140 ° C. Interior surface material (fabric weight: 184 g/m 2 ) with a print derived from print liquid C discontinuously present on the entire surface of one main surface of binder-adhesive nonwoven fabric B (printed with the pattern shown in FIG. ² ) , thickness: 1.5 mm, air permeability: 83.9 cc/cm ² /sec, print weight: 4 g/m ² , average particle diameter of hollow particles: 73.0 μm, CV value: 8.4%). did.
In addition, when the interior surface material prepared in this way was visually observed, it was confirmed that the print was discontinuously present on one main surface side.

(Example 8)
For the interior surface material prepared in Example 7, resin liquid C was applied using a cylinder to the entire main surface of the side where the print was present, and then dried with a dryer at a temperature of 140 ° C. As a result, an interior surface material (fabric weight: 196 g/m ² ) comprising a resin layer derived from resin liquid C (solid printing) covering the entire main surface of the interior surface material on the side where the print is present, Fabric weight of print: 4 g/m ² , average particle diameter of hollow particles: 73.0 μm, CV value: 8.4%, and fabric weight of resin layer: 12 g/m ² ) was prepared.
Furthermore, by applying resin liquid B using a cylinder to the entire main surface on the side where the resin layer is present, and drying it with a dryer at a temperature of 140°C, the print of the interior surface material is present. An interior surface material (solid printing) with a resin layer derived from resin liquid B that covers the entire main surface of the side that is covered (fabric weight: 208 g/m ² , thickness: 1.5 mm, air permeability: 59 .2 cc/cm ² /sec, printed area weight: 4 g/m ² , average particle diameter of hollow particles: 73.0 μm, CV value: 8.4%, total area weight of resin layer: 24 g/m ² ) was prepared. .
In addition, when the interior surface material prepared in this way was visually observed, it was confirmed that the print was discontinuously present on one main surface side.

(Example 9)
After applying printing liquid C to the entire binder-coated surface of binder-adhesive nonwoven fabric B in a discontinuous pattern as shown in FIG. 3 using a cylinder, drying with a dryer at a temperature of 140 ° C. Interior surface material (fabric weight: 182 g/m ² ) with a print derived from print liquid C discontinuously present on the entire surface of one main surface of binder-adhesive nonwoven fabric B (printed with the pattern shown in FIG. 3) , print weight: 2 g/m ² , average particle diameter of hollow particles: 73.0 μm, CV value: 8.4%) were prepared.
An interior surface material (fabric weight: 206 g/m ² , Thickness: 1.5 mm, Air permeability: 60.5 cc/cm ² /sec, Print basis weight: 2 g/m ² , Average particle diameter of hollow particles: 73.0 μm, CV value: 8.4%, Resin layer Total basis weight: 24 g/m ² ) was prepared.
In addition, when the interior surface material prepared in this way was visually observed, it was confirmed that the print was discontinuously present on one main surface side.

(Example 10)
After applying printing liquid C to the entire binder-coated surface of binder-adhesive nonwoven fabric B in a discontinuous pattern as shown in FIG. 4 using a cylinder, drying with a dryer at a temperature of 140 ° C. Interior surface material (fabric weight: 184 g/m ² ) with a print derived from print liquid C discontinuously present on the entire surface of one main surface of binder-adhesive nonwoven fabric B (printed with the pattern shown in FIG. 4) , thickness: 1.5 mm, air permeability: 80.4 cc/cm ² /sec, print area weight: 4 g/m ² , average particle diameter of hollow particles: 73.0 μm, CV value: 8.4%). did.
In addition, when the interior surface material prepared in this way was visually observed, it was confirmed that the print was discontinuously present on one main surface side.

(Example 11)
An interior surface material (fabric weight: 208 g/m ² , Thickness: 1.5 mm, Air permeability: 55.6 cc/cm ² /sec, Print basis weight: 4 g/m ² , Average particle diameter of hollow particles: 73.0 μm, CV value: 8.4%, Resin layer Total basis weight: 24 g/m ² ) was prepared.
In addition, when the interior surface material prepared in this way was visually observed, it was confirmed that the print was discontinuously present on one main surface side.

(Example 12)
After applying printing liquid C to the entire binder-coated surface of binder-adhesive nonwoven fabric B in a discontinuous pattern as shown in FIG. 5 using a cylinder, drying with a dryer at a temperature of 140 ° C. Interior surface material (fabric weight: 184 g/m ² ) with a print derived from print liquid C discontinuously present on the entire surface of one main surface of binder-adhesive nonwoven fabric B (printing the pattern shown in FIG. 5) , thickness: 1.4 mm, air permeability: 84.0 cc/cm ² /sec, print area weight: 4 g/m ² , average particle diameter of hollow particles: 73.0 μm, CV value: 8.4%). did.
In addition, when the interior surface material prepared in this way was visually observed, it was confirmed that the print was discontinuously present on one main surface side.

(Example 13)
An interior surface material (fabric weight: 208 g/m ² , Thickness: 1.5 mm, Air permeability: 57.9 cc/cm ² /sec, Print basis weight: 4 g/m ² , Average particle diameter of hollow particles: 73.0 μm, CV value: 8.4%, Resin layer Total basis weight: 24 g/m ² ) was prepared.

The printing aspect of the interior surface materials prepared in Comparative Examples and Examples and the physical properties of the interior surface materials are summarized in Table 3.

Since the interior surface material of the present invention has excellent design and tactility, it can be suitably used for automotive applications such as ceilings, door sides, pillar garnishes, and rear packages; for interior applications such as partitions; and for building materials such as wall coverings. be able to.

Claims (1)

An interior surface material comprising a print containing particles on at least one main surface of a sheet-like fabric,
The print exists discontinuously on the main surface,
The surface roughness (SMD) of the main surface of the interior surface material on the side where the print is present is 2.75 μm or more and 4.5 μm or less ,
Interior surface materials (excluding fabrics whose threads are multifilament).

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