JP2021165002A - Interior surface material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interior surface material having more excellent wear resistance.
SOLUTION: The interior surface material of the present invention has excellent wear resistance by having a polyurethane acrylate resin layer on one main surface of a fiber sheet. This is because polyurethane acrylate has elasticity, so when the main surface of the interior surface material is scratched, the elastic of the polyurethane acrylate works to restore the dented part to the original surface of the interior surface material. It is thought that this is because the scratches on the main surface of the surface are restored and the scratches become less noticeable.
[Selection diagram] Fig. 1

Description

The present invention relates to interior materials for vehicles such as ceiling materials, door trims, dash outers, pillar garnishes, and interior surface materials that can be used for partitions, wallpaper, and the like. In particular, the present invention relates to interior surface materials such as door trims, dash outers, and pillar garnishes, which can be suitably used as interior materials for vehicles that are required to maintain high design and appearance.

Conventionally, a fiber sheet such as a non-woven fabric has been used as a material constituting an interior surface material. Further, in order to prevent deterioration of the interior surface material due to friction, the interior surface material is required to have abrasion resistance.

As an excellent wear resistance, the applicant of the present application stated that "in a base mat composed of constituent fibers bonded to each other by a binder, the abundance of the binder on one main surface A side is the other. A skin material having a resin layer on the entire surface of one of the main surfaces A of the base mat, which is larger than the main surface B side, is provided (Patent Document 1).

JP-A-2019-43101

The skin material according to Patent Document 1 is certainly excellent in wear resistance, but the skin material according to Patent Document 1 is scratched when a hard material such as a nail is caught on the surface of the skin material. The wear resistance was not sufficient.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an interior surface material having more excellent wear resistance.

The invention according to claim 1 of the present invention is "an interior surface material having a polyurethane acrylate resin layer on one main surface of a fiber sheet."

In the invention according to claim 2 of the present invention, "T ₁ and T ₂ calculated in the following [scratch measurement method] are T ₁ <T ₂ , and _{the value of T 2} is 0.80 or more. The interior surface material according to claim 1, wherein the interior surface material is 0 or less. [Scratch measurement method] (1) Both the incident angle and the light receiving angle are 85 ° on the main surface of the interior surface material having a polyurethane acrylate resin layer. the glossiness _{a 1} when the measures. (2) is defined by a particle size P1000 according to JIS R 6010 (2000), with a polyurethane acrylate resin layer interior surface material of the coated abrasive of 2 cm × 2 cm The point where the glossiness was measured in (1) on the main surface having the polyurethane acrylate resin layer of the interior surface material by placing it on the main surface and applying a load of 500 g and reciprocating the polishing cloth paper 30 times in 1 minute. rub. (3) the same place the glossiness a ₂ and (1) on the main surface of the interior surface material rubbed in (2), and in the same way, is measured immediately after finished rubbing. (4) (2 after 10 minutes of) at finished rubbed interior surface material rubbed, measuring the glossiness a ₃ on the main surface of the interior surface material at the same place, and the same method as in (1). (5) below _{T 1} and T ₂ are calculated by the formula of _{T 1} = A ₂ / A ₁ T ₂ = A ₃ / A ₁ ".

The interior surface material according to claim 1 of the present invention has excellent wear resistance because it has a polyurethane acrylate resin layer on one main surface of the fiber sheet. This is because polyurethane acrylate has elasticity, so when the main surface of the interior surface material is scratched, the elastic of the polyurethane acrylate works to restore the dented part to the original surface of the interior surface material. It is thought that this is because the scratches on the main surface of the surface are restored and the scratches become less noticeable.

In the interior surface material according to claim 2 of the present invention, T ₁ and T ₂ calculated by the scratch measurement method are T ₁ <T ₂ , and _{the value of T 2} is 0.80 or more and 1.0 or less. Is. That is, even if the main surface of the interior surface material is scratched by the abrasive cloth and the glossiness is lowered, the glossiness is restored to some extent with the passage of time, so that the wear resistance of the interior surface material is excellent.

In one main surface of the decorative fibrous sheet of Examples and Comparative Examples, is a plan view showing the arrangement of the after performing print P _A and the print P _B.

The interior surface material of the present invention has a polyurethane acrylate resin layer on one main surface of the fiber sheet. The reason why the wear resistance of the interior surface material is excellent by having the polyurethane acrylate resin layer is not completely understood, but the main surface of the interior surface material is scratched because the polyurethane acrylate has elasticity. At that time, the elasticity of the polyurethane acrylate works to restore the dented part due to the scratch, and the dented part due to the scratch on the main surface of the interior surface material returns to the original, so that the scratch becomes inconspicuous. Be done. The main surface means the widest surface.

The polyurethane acrylate resin layer provided on one main surface of the fiber sheet may be provided on the entire surface or partially on one main surface, but the wear resistance of the interior surface material is further improved. As described above, it is preferable that the polyurethane acrylate resin layer is provided on the entire surface of one of the main surfaces. Further, the polyurethane acrylate resin layer may be provided not only on one main surface of the fiber sheet but also on both main surfaces.

The thickness of the polyurethane acrylate resin layer on one main surface of the fiber sheet is preferably 10 μm or more, more preferably 13 μm or more, still more preferably 15 μm or more, because the thicker the thickness, the more excellent the wear resistance. If the thickness of the polyurethane acrylate resin layer is too thick, the molding processability may deteriorate. Therefore, the upper limit of the thickness is realistically 100 μm or less. The thickness of the polyurethane acrylate resin layer is a value when the cross section of the interior surface material is measured with a microscope without applying a load.

In the interior surface material of the present invention, T ₁ and T ₂ calculated in the following [Scratch measurement method] are T ₁ <T ₂ , and _{the value of T 2} is 0.80 or more and 1.0 or less. It is preferable to have it. On the main surface having the damaged Measurement Method] (1) Polyurethane acrylate resin layer interior surface material, angle of incidence, the glossiness A ₁ when both of the light receiving angle is 85 °, measured. (2) A 2 cm × 2 cm abrasive cloth paper specified by the particle size P1000 described in JIS R 6010 (2000) is placed on a main surface having a polyurethane acrylate resin layer as an interior surface material, and a load of 500 g is applied. The abrasive cloth is reciprocated 30 times in 1 minute, and the point where the glossiness is measured is rubbed on the main surface having the polyurethane acrylate resin layer of the interior surface material (1). (3) the same place the glossiness A ₂ and (1) on the main surface of the interior surface material rubbed in (2), and in the same way, is measured immediately after finish rubbing. (4) after 10 minutes of finished rubbing the interior surface material rubbed in (2), measuring the glossiness A ₃ on the main surface of the interior surface material at the same place, and the same method as (1) .. (5) _{Calculate T 1} and T ₂ using the following formula. T ₁ = A ₂ / A ₁ T ₂ = A ₃ / A ₁

From T ₁ and T ₂ , it is possible to confirm the degree of damage caused by the abrasive cloth on the main surface of the interior surface material. When T ₁ <T ₂ , the damage caused by the abrasive cloth on the main surface of the interior surface material becomes shallower with the passage of time, and _{the value of T 2} is 0.80 or more and 1.0 or less. Therefore, the degree of damage caused by the abrasive cloth on the main surface of the interior surface material is shallow. From this, when T ₁ <T ₂ and _{the value of T 2} is 0.80 or more and 1.0 or less, the wear resistance of the interior surface material is excellent.

The value of T ₁ is not particularly limited, _{but if the value of T 1} is too small (the degree of damage to the main surface is too large), _{the value of T 2} is small and the wear resistance is inferior. 0.50 or more is preferable, and 0.70 or more is preferable. The _{closer the value of T 2} is to 1.0, the smaller the degree of damage to the main surface of the interior surface material by the abrasive cloth is small. Therefore, 0.90 or more is preferable, and 0.95 or more is preferable. Preferably, the ideal is 1.0. The reason why the interior surface material was rubbed with the abrasive cloth specified by the particle size P1000 is that the scratches when the nails were caught on the surface of the interior surface material were reproduced with the abrasive cloth specified by the particle size P1000. Is.

The fiber sheet that can be used for the interior surface material of the present invention refers to a sheet-like fiber structure such as a woven fabric, a knitted fabric, or a non-woven fabric. In particular, it is preferable that the fiber sheet used in the present invention is a non-woven fabric because it is flexible and easily follows the shape of the mold. Among the non-woven fabrics, a dry non-woven fabric or a non-woven fabric produced by a direct spinning method has a certain thickness. It is more preferable because it has excellent molding processability.

The constituent fibers of the fiber sheet constituting the interior surface material of the present invention are not particularly limited, and may be, for example, polyester fibers, nylon fibers, acrylic fibers, vinylon fibers, rayon fibers, and the like. Among these, it is preferable to contain either polyester fiber having excellent heat resistance, light resistance, stain resistance and the like, or rayon fiber having excellent flame retardancy. Further, the constituent fibers may be single fibers or composite fibers containing two or more types of resins such as core-sheath type and side-by-side type. For example, when latent crimp fibers (side-by-side type composite fibers, etc.) are used, the fibers develop crimps due to heat, and by using the fibers that develop crimps, the structure of the interior surface material becomes dense. Is preferable. Further, the cross section of the constituent fibers may be circular, or may be irregular such as an ellipse, a quadrangle, or a Y-shaped cross section. In addition, it may contain fibrillated fibers.

The constituent fibers may be white or colored. When the constituent fibers are colored, the fibers themselves may be uncoated fibers containing at least one of the pigment and the dye in the constituent resin, or the fibers themselves may be colored at least one of the pigment and the dye. Although it is good, it is preferable to use a dyed fiber because the fiber is not easily discolored by rubbing.

Although the fiber lengths of the constituent fibers of the fiber sheet constituting the interior surface material of the present invention are appropriately adjusted, the fiber lengths of the constituent fibers are 38 to 114 mm because the interior surface material has excellent molding processability. It is preferably 38 to 76 mm, more preferably 38 to 52 mm, and even more preferably 38 to 52 mm. This "fiber length" refers to a value measured according to the JIS L 1015 (2010) 8.4.1c) direct method (C method).

Further, the fineness of the constituent fibers of the fiber sheet constituting the interior surface material of the present invention is also adjusted as appropriate, but if the fibers are too thick, it tends to be difficult to obtain an interior surface material having a smooth surface. On the other hand, if the fibers are too thin, the productivity of the fiber sheet may deteriorate. Therefore, the fineness of the constituent fibers of the fiber sheet is preferably 0.2 to 6.0 dtex, more preferably 0.8 to 4.0 dtex, and further preferably 1.0 to 3.0 dtex. ..

The interior surface material of the present invention may be composed of a single fiber sheet or may be composed by laminating a plurality of fiber sheets. As the interior surface material formed by laminating a plurality of fiber sheets, fiber sheets having the same fiber composition may be laminated, or fiber sheets having different fiber compositions may be laminated. Of these, an interior surface material composed of a single fiber sheet is preferable because it can provide an interior surface material having excellent molding processability without delamination during molding.

Basis weight of the fiber sheet constituting the interior surface material of the present invention is not particularly limited, it is preferably 50 to 500 g / ^{m 2,} more preferably ^{80~300g / m 2, 100~200g / m} 2 is More preferred. The basis weight means the mass per ^{1 m 2 of the sheet.}

The thickness of the fiber sheet constituting the interior surface material of the present invention is appropriately selected, but is preferably 0.5 to 5.0 mm, more preferably 1.0 to 3.0 mm, and 1.1 to 2 5.5 mm is more preferred. The thickness refers to the value of the length between the two main surfaces under a load of 100 g / 5 cm ^{2 and means the arithmetic mean value of the thickness at 10 randomly selected points.}

Since the interior surface material of the present invention can impart wear resistance by adhering the constituent fibers of the interior surface material, a fiber bonding binder is provided on one or both main surfaces of the interior surface material. It is preferable to have it. The resin contained in the fiber bonding binder is not particularly limited, and may be, for example, a vinyl chloride resin, an acrylic resin, or a polyester resin. Among these, an acrylic resin (particularly, a self-crosslinking acrylic resin) is preferable because it is moderately softened at the time of molding, has excellent followability to the mold, and is less likely to generate wrinkles and fine irregularities. Among the acrylic resins, a soft acrylic resin having a low glass transition temperature is suitable because it is easily stretchable and has excellent molding processability. On the other hand, if the glass transition temperature of the acrylic resin is too low, the adhesive strength of the binder is improved, but the breaking strength of the binder resin is inferior, so that the wear resistance is inferior. Therefore, the glass transition temperature is preferably −60 ° C. or higher and 10 ° C. or lower, more preferably −50 ° C. or higher and 5 ° C. or lower, and further preferably −45 ° C. or higher and 5 ° C. or lower. The "glass transition temperature" in the present invention refers to the temperature at the intersection of the tangent of the baseline in the DTA curve measured by a differential thermal analyzer (DTA) and the tangent of the steep descending position of the heat absorption region due to the glass transition.

In addition to the resin contained in the fiber bonding binder, the fiber bonding binder contains additives such as flame retardants, fragrances, pigments, antibacterial agents, antifungal agents, emulsifiers, dispersants, and surfactants. May be.

The amount of the binder for fiber adhesion contained in the interior surface material of the present invention ^{is preferably 2} g / m 2 or more, more preferably 3 g / m ² or more, and 4 g / m so that the interior surface material has excellent wear resistance. ² or more is more preferable. The upper limit of the amount of the binder for fiber bonding is practically ^{10 g / m 2} or less because if it is too large, the molding processability may be deteriorated.

The interior surface material of the present invention may have a print on one or both main surfaces of the interior surface material in order to decorate the interior surface material and improve wear resistance. The resin contained in the print is not particularly limited, but can be the same resin as the resin contained in the fiber bonding binder, and is an acrylic resin (particularly, a self-crosslinking acrylic resin). preferable.

The amount of such prints is not particularly limited, ^{but is preferably 3 g / m 2} or more, more preferably 5 g / m ² or more, and even more preferably 9 g / m ² or more. Further, if the amount of printing is too large, the sharpness of the pattern due to printing and the moldability tend to be impaired. Therefore, the amount of printing ^{is preferably 20 g / m 2} or less.

When the interior surface material of the present invention contains a fiber bonding binder, the print may be held on the main surface having the fiber bonding binder or on the main surface not having the fiber bonding binder. It is good, but it is preferable to have the print on the main surface having the binder for fiber adhesion because the pattern by the print becomes clear.

Further, the print may be exposed on the main surface of the interior surface material, or the print may be covered with a polyurethane acrylate resin layer or a resin layer described later and not exposed on the main surface of the interior surface material. May be good. The print may have any pattern and is not particularly limited, but for example, a pattern unit such as a dot shape such as a circle or a quadrangle, a straight line shape, a curved line shape, a character, a figure, a symbol, or a picture can be used. , It can be a pattern arranged regularly or irregularly. Further, the pattern units do not have to be the same, and different pattern units may be combined. Further, the print may contain additives other than the resin contained in the print, as in the case of the fiber bonding binder.

The interior surface material of the present invention suppresses fluffing of the constituent fibers of the interior surface material, and in order to improve the durability and abrasion resistance of the interior surface material, the entire main surface of at least one of the interior surface materials is used. May have a resin layer separate from the polyurethane acrylate resin layer. The resin contained in the resin layer is not particularly limited, but can be a resin similar to the resin contained in the fiber bonding binder and the print, and is an acrylic resin (particularly, a self-crosslinking acrylic resin). Is preferable.

^{The amount of such a resin layer is preferably 5 g / m 2} or more, more preferably 8 g / m ² or more, still more preferably 10 g / m ² or more so that wear resistance can be imparted to the interior surface material. Further, if the amount of the resin layer is too large, the molding processability tends to be impaired, so that the amount is preferably ^{20 g / m 2 or less.}

When the interior surface material of the present invention contains at least one of a fiber bonding binder and a print, the resin layer is used for fiber bonding even if it is provided on the entire main surface having at least one of the fiber bonding binder and the print. It may be provided on the entire surface of the main surface having no binder or print, but in order to improve the wear resistance of the interior surface material, the resin layer is provided on the entire surface of the main surface having at least one of the binder for fiber adhesion and the print. It is preferable to have it. Further, the interior surface material of the present invention has a polyurethane acrylate resin layer on one main surface, and the resin layer is coated with the polyurethane acrylate resin layer in order to improve the wear resistance of the interior surface material. Is preferable. Further, the resin layer may contain additives other than the resin contained in the resin layer, as in the case of the fiber bonding binder and the print.

Basis weight of the interior surface material of the present invention is appropriately selected, preferably 140~260g / ^{m 2,} more preferably 150~255g / ^{m 2,} more preferably 160~260g / ^{m 2.} The thickness of the interior surface material of the present invention is appropriately selected, but is preferably 1.0 to 2.0 mm, more preferably 1.3 to 1.8 mm, and even more preferably 1.5 to 1.6 mm. ..

The 20% modulus of the interior surface material of the present invention is appropriately adjusted depending on the intended use, but if the 20% modulus in the vertical direction is too high, the molding processability tends to deteriorate. Therefore, the 20% modulus in the vertical direction is used. The width is preferably 150 N / 3 cm or less, more preferably 130 N / 3 cm width or less, and further preferably 110 N / 3 cm width or less. If the 20% modulus is too low, the fibers are not sufficiently entangled with each other, and the moldability and wear resistance are deteriorated. Therefore, the lower limit of the 20% modulus in the vertical direction is 80 N / 3 cm. preferable. Further, the 20% modulus ratio in the vertical direction and the horizontal direction is 3/2 to 3 in the vertical / horizontal direction because the molding processability is excellent when the 20% modulus strength in the horizontal direction is lower than the 20% modulus in the vertical direction. It is preferably 1/1. The "longitudinal direction" in the present invention refers to a production direction (flow direction) during fiber sheet production, and the "horizontal direction" refers to a method orthogonal to the vertical direction, that is, a width direction.

The interior surface material of the present invention may further include other constituent members such as a fiber sheet, a film, and a foam. It is preferable that these constituent members are provided on the main surface of the interior surface material which does not have the polyurethane acrylate resin layer.

Next, the production method of the present invention will be illustrated and described.

First, fiber sheets such as woven fabrics, knitted fabrics, and non-woven fabrics are manufactured using the above-mentioned fibers. The method for producing the fiber structure is not particularly limited, but when the fiber sheet is a woven fabric or a knitted fabric, it can be produced by weaving or knitting the above-mentioned fibers. When the fiber sheet is a non-woven fabric, for example, a dry non-woven fabric in which the above-mentioned fibers are used in a card device or an air array device to entangle the fibers, a wet non-woven fabric in which the fibers are dispersed in a solvent and the fibers are entangled in a sheet shape, or directly. Spinned non-woven fabric [Melt blow method, spun bond method, electrostatic spinning method, method of discharging a spinning stock solution and a gas flow in parallel to spin (for example, the method disclosed in JP-A-2009-287138)) It can be manufactured by using a non-woven fabric that spins and collects the non-woven fabric], but the non-woven fabric is preferable so that it has excellent molding processability, and it is preferable that the non-woven fabric has a certain bulk. It is preferable to use a dry non-woven fabric in which fibers are entangled by being used in an apparatus or the like.

When the fiber sheet is a non-woven fabric, it is preferably entangled by a stream of water or a needle for ease of handling. In particular, it is preferable to entangle with a needle so as not to impair the thickness and, as a result, the moldability. Suitable needle entanglement conditions are not particularly limited, but entanglement is preferably performed at a needle density of 300 to 1000 needles / cm ² , and more preferably 300 to 600 ^{needles / cm 2} .

If necessary, thermocompression bonding may be performed after the fiber sheet is formed and before the constituent fibers are bonded by the fiber bonding binder. Note that this "thermocompression bonding" does not mean that the fibers are in a state of being melted or plastically deformed and adhered, but the gaps between the fibers become smaller due to heat and pressure, and the fibers adhere to each other at high density. It means that it is in a state of being.

Next, in order to impart abrasion resistance by adhering the constituent fibers of the surface material for interior use, a fiber bonding binder liquid is applied to the fiber sheet by a method such as impregnation, foaming impregnation, coating, or spraying, and then the fiber sheet is coated. By drying, it is preferable to bond the constituent fibers of the fiber sheet with a fiber bonding binder. At this time, the fiber bonding binder liquid may be applied from one main surface or both main surfaces, but since it is excellent in molding processability, it is applied from one main surface. It is preferable to do so.

Next, in order to decorate the interior surface material and improve the abrasion resistance, a printing liquid is applied to one main surface of the fiber sheet or the fiber bonding binder to apply the fiber sheet or the fiber bonding binder. It is preferable to apply the print to one or both main surfaces of the fiber sheet. When printing is applied to the fiber sheet to which the binder for fiber adhesion is applied, the printing liquid is preferably applied to the main surface to which the binder liquid for fiber adhesion is applied because the pattern due to the printing becomes clear. The method of applying the printing liquid is not particularly limited, but for example, a cylinder having a through hole on the entire surface is prepared, such as a tubular silk screen, and printing is performed from the inside of the tubular silk screen through the through hole of this cylinder. A method can be adopted in which the liquid is extruded onto one main surface of the fiber sheet and applied, and the dispersion medium or solvent is removed from the applied printing liquid. The method for removing the dispersion medium or solvent is appropriately adjusted. For example, the dispersion medium or solvent can be removed by heating and drying the fiber sheet to which the printing liquid is applied with a dryer.

Next, in order to improve the durability and abrasion resistance of the interior surface material, the resin layer constituent liquid constituting the resin layer is applied to the fiber sheet to which at least one of the fiber sheet, the fiber bonding binder, and the print is applied. It is preferable to form a resin layer on the surface material for interior by applying the binder in the same manner as in the method of applying the binder for fiber adhesion and then drying the binder. When the resin layer constituent liquid is applied to the fiber sheet to which at least one of the binder for fiber adhesion and the print is applied, the resin layer can be applied so that the abrasion resistance of the interior surface material can be improved and the print can be protected. The constituent liquid is preferably applied to the main surface to which at least one of the binder liquid for fiber adhesion and the printing liquid is applied.

Finally, the present invention comprises applying polyurethane acrylate to one main surface of the fiber sheet or the fiber sheet to which at least one of the fiber bonding binder, the print, and the resin layer is applied to form the polyurethane acrylate resin layer. Manufactures interior surface materials. When the polyurethane acrylate is applied to the fiber sheet to which at least one of the binder for fiber adhesion, the print, and the resin layer is applied, the polyurethane acrylate is applied to at least one of the binder liquid, the print liquid, and the resin layer constituent liquid of the fiber sheet. It may be applied on the main surface or on the main surface to which no binder liquid, printing liquid, or resin layer constituent liquid is applied, but since the surface material for interior is excellent in abrasion resistance, the binder liquid may be applied. , It is preferable to apply the polyurethane acrylate on the main surface to which at least one of the printing liquid and the resin layer constituent liquid is applied.

As a method of applying polyurethane acrylate on one main surface of a fiber sheet or a fiber sheet to which at least one of a binder for fiber adhesion, a print, and a resin layer is applied to form a polyurethane acrylate resin layer, for example, on the surface. Examples thereof include a method in which urethane acrylate is applied using a doctor knife, a roll coater, or a roll screen, and then the urethane acrylate applied by ultraviolet rays or heat is crosslinked to change the urethane acrylate into a polyurethane acrylate. Further, after producing the interior surface material of the present invention, the thickness of the interior surface material may be adjusted by subjecting the interior surface material to a hot press or passing it between rolls.

Examples of the present invention will be described below, but the present invention is not limited to the following examples.

(Preparation of needle punch non-woven fabric)
Using 100 mass% of the original polyester fiber (fineness: 2.2 dtex, fiber length: 38 mm, color: gray), the fiber was opened by a card machine to form a fiber web. Then, a needle punching process was performed at a needle density of 400 needles / cm ^2. Next, a needle-punched non-woven fabric (fiber sheet) was produced by supplying heat between thermal calender rolls having a temperature of 170 ° C. and a roll interval of 0.4 mm and thermocompression-bonding the fiber web that had undergone needle-punching treatment (grain: 180 g). / M ² , thickness: 1.5 mm).
(Preparation of binder liquid for fiber adhesion)
A binder solution for fiber adhesion was prepared in the following proportions.
(1) Acrylic binder resin (glass transition temperature: -5 ° C., solid content mass: 4% by mass) ... 9 parts by weight (2) Thickener A (solid content mass: 0.02% by mass) ... 10 parts by weight (3) Surface active agent (solid content mass: 50% by mass) ... 0.2 parts by weight (4) 25% ammonia water ... 0.1 parts by weight (5) water ... 80. 7 parts by weight (preparation of printing liquid A)
A printing liquid A was prepared, which was blended in the following proportions.
(1) Acrylic binder resin (glass transition temperature: -40 ° C., solid content weight: 50% by mass) ... 10 parts by weight (2) Thickener B (solid content mass: 1.5% by mass) ... 24 parts by weight (3) Thickener C (solid content mass: 28% by mass) ... 1 part by weight (4) Antifoaming agent (solid content mass: 14% by mass) ... 0.5 parts by weight (5) ) 25% ammonia water: 1 part by mass (6) water: 63.26 parts by mass (7) green pigment: 0.24 parts by mass (preparation of printing liquid B)
The printing liquid B was prepared by blending in the following ratios.
(1) Acrylic binder resin (glass transition temperature: -5 ° C., solid content weight: 40% by mass) ... 18 parts by weight (2) Thickener B (solid content mass: 1.5% by mass) ... 24 parts by weight (3) Thickener C (solid content mass: 28% by mass) ... 1 part by weight (4) Antifoaming agent (solid content mass: 14% by mass) ... 0.5 parts by weight (5) ) 25% ammonia water: 1 part by mass (6) water: 42.5 parts by mass (7) black pigment: 13 parts by mass (preparation of resin layer constituent liquid)
A resin layer constituent liquid was prepared in the following proportions.
(1) Acrylic binder (glass transition temperature: -5 ° C., solid content mass: 40% by mass) ... 25 parts by weight (2) Thickener B (solid content mass: 1.5% by mass) ... 26 Parts by weight (3) Thickener C (solid content mass: 28% by mass) ... 1 part by weight (4) Antifoaming agent (solid content mass: 14% by mass) ... 0.5 parts by weight (5) 25% ammonia water: 1 part by mass (6) Water: 46.5 parts by mass (preparation of urethane acrylate solution)
A urethane acrylate liquid (manufactured by Tokushiki Co., Ltd., AUP-828, solid content mass: 100%) was prepared.

(Example 1)
The foamed binder liquid for fiber adhesion was applied to the entire surface of one main surface of the needle-punched non-woven fabric, allowed to permeate, and the needle-punched non-woven fabric was passed between two rollers having a distance between rolls of 0.25 mm. Then, it was dried with a dryer at a temperature of 160 ° C. for 5 minutes ^{to prepare a binder-imparted non-woven fabric for fiber adhesion (grain: 185 g / m 2} , thickness: 1.5 mm).
Next, a plurality of prints were made in a "<" shape with a cylinder using the printing liquid A on the main surface of the non-woven fabric for fiber bonding having the fiber bonding binder. Further, before the printing liquid A dries, the printing liquid B is used again to print a plurality of straight lines diagonally upward to the right with the cylinder (line width: 0.24 mm, line spacing: 0.56 mm, angle: 45 °). Then dried for 3 minutes with a dryer temperature 160 ° C., as shown in FIG. 1, the print imparted nonwoven fabric having a shape of the print P _A and a straight line toward the upper right direction print P _B of the "V" (basis weight: 194 g / ^{m 2,} the print _{P a} weight: 4g / ^{m 2,} the print _{P B} weight: 5g / ^{m 2,} thickness: 1.5 mm) was prepared.
The resin layer constituting liquid in the cylinder on the entire surface of the principal surface having a print P _A and P _B of the printed granted nonwoven fabric entirely coated, dried for 3 minutes at a dryer temperature of 180 ° C., the resin composed mainly of acrylic A non-woven fabric having a layer (weight: 209 g / m ² , thickness: 1.6 mm) was prepared.
Finally, a urethane acrylate solution was applied to the entire surface of the main surface having the resin layer of the non-woven fabric having the resin layer mainly composed of acrylic using a doctor knife. After that, it is heated for 5 minutes with a dryer having a temperature of 100 ° C., and both sides are irradiated for 6 hours each using a 40 W UV lamp to cure the urethane acrylate with ultraviolet rays to change it into polyurethane acrylate, and the polyurethane acrylate resin layer is mainly used on one side. Surface material for interior of Example 1 having the entire surface (grain: 229 g / m ² , thickness: 1.7 mm, thickness of polyurethane acrylate resin layer: 20 μm, 20% modulus in the vertical direction: 80 N / 3 cm, horizontal 20% modulus in direction: 42N / 3cm) was prepared.

(Comparative Example 1)
^{Interior surface material of Comparative Example 1 (weight: 209 g / m 2} , thickness: 1.6 mm, 20% in the vertical direction) in the same manner as in Example 1 except that the urethane acrylate solution was not applied. Modulus: 75 N / 3 cm, lateral 20% modulus: 36 N / 3 cm) was prepared.

(Comparative Example 2)
Instead of the urethane acrylate liquid, the resin layer constituent liquid is applied again to the entire surface of the main surface of the non-polypoly having the resin layer mainly composed of acrylic, which has a resin layer mainly composed of acrylic, and the resin layer constituent liquid is applied again with a dryer at a temperature of 180 ° C. 3 Similar to Example 1, the interior surface material of Comparative Example 2 having a resin layer mainly composed of acrylic on the resin layer mainly composed of acrylic (grain: 229 g /), except that it was dried for a minute. m ² , thickness: 1.7 mm, 20% modulus in the vertical direction: 100 N / 3 cm, 20% modulus in the horizontal direction: 52 N / 3 cm) were prepared.

Further, by applying to the above-mentioned [Scratch measurement method], the glossiness A ₁ , A ₂ , A ₃ of the interior surface materials of Examples 1 and Comparative Examples 1 and 2 are measured, and T ₁ and T ₂ are calculated. bottom. At this time, since Comparative Examples 1 and 2 did not have the polyurethane acrylate resin layer, the glossiness was measured on the main surface having the resin layer mainly composed of acrylic. When rubbing the interior surface material, a Gakushin type friction tester (RT-200, manufactured by Daiei Kagaku Seiki Seisakusho Co., Ltd.) was used.

The measurement results of [Scratch measurement method] are shown in Table 1 below.

Comparing the measurement results of the scratch measurement methods of Example 1 and Comparative Examples 1 and 2, it was found that the T ₂ value of Example 1 was higher than that of Comparative Example, and the surface material for interior was excellent in abrasion resistance. all right. Further, in the example in which the polyurethane acrylate resin layer is provided on the entire surface of one of the main surfaces, T ₁ <T ₂ , while in the comparative example in which the polyurethane acrylate resin layer is not provided, T ₁ = T ₂ , the polyurethane acrylate is used. It was found that the damage to the interior surface material was recovered with the passage of time, and T ₁ <T _2.

The interior surface material of the present invention has high resistance to vehicle interior materials such as ceiling materials, door trims, dash outers, pillar garnishes, partitions, wallpaper, etc., particularly door trims, dash outers, pillar garnishes, etc. It can be suitably used as an interior material for vehicles that requires abrasion resistance and pilling resistance.

Claims (2)

An interior surface material having a polyurethane acrylate resin layer on one main surface of a fiber sheet. _{The interior according to claim 1,} wherein T 1 and T ₂ calculated in the following [Scratch measurement method] are T ₁ <T ₂ , and _{the value of T 2} is 0.80 or more and 1.0 or less. Surface material for.
[Scratch measurement method]
(1) over the main surface with a polyurethane acrylate resin layer interior surface material, angle of incidence, the glossiness A ₁ when both of the light receiving angle is 85 °, measured.
(2) A 2 cm × 2 cm abrasive cloth paper specified by the particle size P1000 described in JIS R 6010 (2000) is placed on a main surface having a polyurethane acrylate resin layer as an interior surface material, and a load of 500 g is applied. The abrasive cloth is reciprocated 30 times in 1 minute, and the point where the glossiness is measured is rubbed on the main surface having the polyurethane acrylate resin layer of the interior surface material (1).
(3) the same place the glossiness A ₂ and (1) on the main surface of the interior surface material rubbed in (2), and in the same way, is measured immediately after finish rubbing.
(4) after 10 minutes of finished rubbing the interior surface material rubbed in (2), measuring the glossiness A ₃ on the main surface of the interior surface material at the same place, and the same method as (1) ..
(5) _{Calculate T 1} and T ₂ using the following formula.
T ₁ = A ₂ / A ₁
T ₂ = A ₃ / A ₁

Images