JP2007002370A - Skin material for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suede-like skin material for vehicles, which has a suede-like soft hand and has abrasion durability and a dust adhesion-preventing property suitable for the use of the vehicles. <P>SOLUTION: This skin material for the vehicles, prepared by raising the front yarns 1 of a tricot knitted fabric knitted with a tricot machine having three reeds, is characterized in that the front yarns are multifilament yarns having a single filament fineness of 0.4 to 0.6 dtex, and a perfect cut rate by raising the front yarns 1 is 25 to 45%. The density of the raised piles 3 is 40,000 to 700,000 piles/inch<SP>2</SP>. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle skin material, and more particularly, to a suede-like skin material having good wear durability and dust adhesion prevention properties.

  Conventionally, a suede-like skin material has been used as a vehicle skin material because the texture is flexible and high-class. In order to obtain a soft texture in the suede-like skin material, many ultrafine fibers are used. However, suede-like skin materials using such ultra-fine fibers are more susceptible to dust and wear resistance than other vehicle skin materials such as leather, vinyl chloride sheets, fabrics, and velours. There was a problem of being inferior.

  In order to solve these problems, in Patent Document 1, a silicone-based compound having a molecular weight of 50,000 or more is imparted to a fibrous base material of a suede-like skin material to form a firm oil film having smoothness on the skin surface. A method of forming a suede-like artificial leather excellent in wear durability by forming is disclosed.

  Patent Documents 2 and 3 disclose a method of obtaining an artificial leather having antifouling properties by attaching a cationic fluororesin emulsion to the artificial leather to form an antifouling film.

  However, in the above method, the surface tactile feel of the skin material changes to a slimy one, or the silicone-based compound or the fluororesin tends to burn, so that sufficient flame retardance to be used as a vehicle skin material cannot be obtained. There was a problem.

Patent Document 4 discloses a woven or knitted fabric in which dust, animal hair, and human hair are less likely to adhere by using long fibers that define the flatness of the fiber cross section and the single fiber fineness in the raised yarn of the woven or knitted fabric. Yes. However, when flat yarn is used as the raised yarn, there is a problem that finger marks are easily generated because the color difference between the fiber cross section and the side surface is easily noticeable.
JP 2002-180380 A JP 2003-154307 A Japanese Patent Laid-Open No. 2004-36018 JP 2002-339186 A

  An object of the present invention is to provide a skin material for a suede-like vehicle having a soft texture of suede-like and having wear durability and dust adhesion prevention suitable for vehicles.

  The present invention has been made to achieve the above object, and (1) is a vehicle skin material in which a front yarn of a tricot knitted fabric knitted using a tricot knitting machine having three ridges is raised. A front skin material for a vehicle, wherein the front yarn is a multifilament yarn having a single yarn fineness of 0.4 to 0.6 dtex, and a complete cut rate by raising the front yarn is in the range of 25 to 45%. It is.

Moreover, (2) It is the skin material for vehicles as described in (1) whose density of a raising pile is 40000-700000 pieces / 吋² .

  The present invention is a suede skin material obtained by raising a front yarn of a tricot knitted fabric knitted using a tricot knitting machine having three ridges, and the front yarn has a single yarn fineness of 0.4 to Providing suede-like interior materials with excellent wear durability and dust adhesion prevention by using 0.6dtex multifilament yarn and the complete cut rate of the front yarn raised within the range of 25-45% It can be done.

  Hereinafter, the present invention will be described in more detail.

  As a result of intensive studies on a suede-like skin material having wear durability and dust adhesion prevention suitable for use in vehicles, the present inventors have three ridges as a fibrous base material of the suede-like skin material. Using a tricot knitted fabric knitted using a tricot knitting machine, the single yarn fineness of the multifilament yarn used for the front yarn of the tricot knitted fabric and the complete cut rate by raising of the front yarn are in a specific range, particularly Has found that the object of the present invention can be achieved by setting the single yarn fineness of the front yarn to 0.4 to 0.6 dtex and the complete cut rate to 25 to 45%.

The density of the raised pile according to the present invention is preferably 40,000 to 700,000 pieces / 吋² . If the density is less than 40,000 / 吋² , the tactile sensation may be poor and the appearance may be deteriorated. Further, when the density is more than 700000 pieces / cm ² , dust tends to adhere, and since there are many piles, it is difficult to obtain a suede feel.

  The skin material for a suede-like vehicle according to the present invention is manufactured by a tricot knitting machine having three ridges, has an appearance close to natural suede, and is excellent in that the stitches and folds of the base fabric constituting the skin material are not visible. is there. When a tricot knitted fabric manufactured by a tricot knitting machine having two ridges is used, the raised front yarns are likely to be gathered and have a grainy feeling, which may deteriorate the surface quality. In addition, when a tricot knitted fabric manufactured by a tricot knitting machine having four ridges is used, the basis weight increases, which may increase the cost.

  Although there is no restriction | limiting in particular about the gauge of the tricot knitting machine to be used, It is preferable to use a 28-36 gauge knitting machine. If it is less than 28 gauge, the density of the skin material becomes coarse, and there is a possibility that a fine suede-like surface appearance cannot be obtained. If the gauge exceeds 36 gauge, the thread to be used becomes thin, and there is a possibility that the strength suitable for the vehicle application cannot be obtained.

  Further, the course on the knitting machine during tricot knitting is preferably 55 to 70 courses / inch. If it is less than 55 courses / inch, the nap density is low and a suede-like dense appearance may not be obtained. If it exceeds 70 courses / inch, the obtained suede-like skin material may be hardened.

  The fibers constituting the tricot knitted fabric of the present invention are not particularly limited, and conventionally known synthetic fibers such as polyester, nylon and acrylic, regenerated fibers such as rayon, natural fibers such as cotton and hemp, It is also possible to use a mixture of two or more kinds of fibers by blending, blending, knotting, knit, or the like. Of these, polyester is preferably used from the viewpoint of strength and light resistance suitable for vehicle use.

  As the middle yarn and the back yarn forming the ground texture of the tricot knitted fabric, filament yarn raw yarn and processed yarn can be used, and can be appropriately selected according to the purpose. The fineness of the yarn used for the middle yarn and the back yarn is preferably in the range of 56 to 167 dtex. If it is less than 56 dtex, the strength suitable for the vehicle application may not be obtained. Moreover, when larger than 167 dtex, there exists a possibility that the texture of a suede-like skin material may become hard.

  The yarn used for the front yarn of the tricot knitted fabric needs to be a multifilament yarn in order to obtain suede-like napping by raising. The fineness of the multifilament yarn is preferably in the range of 56 to 220 dtex. If it is less than 56 dtex, the napped density is low, and a suede-like surface appearance may not be obtained. If it is larger than 220 dtex, there is a possibility that the resistance of the cloth becomes large when raising and the surface appearance becomes rough.

  Furthermore, in the present invention, it is essential to use a multifilament yarn in which the single yarn fineness of the front yarn of the tricot knitted fabric is in the range of 0.4 to 0.6 dtex. By using the yarn in the above range, it is possible to obtain an appearance that is excellent in wear durability and dust adhesion prevention, is soft in surface touch and approximates that of natural leather. When the single yarn fineness of the front yarn is less than 0.4 dtex, there is a possibility that the wear durability suitable for vehicle use cannot be obtained because the yarn (fiber) is thin. If it is larger than 0.6 dtex, the texture becomes hard and a suede-like soft touch may not be obtained.

  Further, the structure of the tricot knitted fabric may be appropriately determined with reference to the prior art. However, since the front yarn is raised, the structure of the front yarn is preferably a structure having a swing of two stitches or more. Furthermore, it is preferable to set it as the structure | tissue which has the swing of the range between 2-3 needles. When the distance is less than 2 stitches, the density of the raised hairs becomes coarse, so that the surface appearance may be deteriorated. When the distance is more than 3 stitches, the productivity is poor and the cost may be increased.

  After knitting the tricot knitted fabric as described above, scouring, relaxation, dyeing treatment, and the like are performed by a known method to perform raising processing. If necessary, an antistatic agent, a smoothing agent, or the like may be applied to the tricot knitted fabric by padding as a pretreatment agent for raising, or an impregnation treatment with a polyurethane resin may be performed.

  In the present invention, the front yarn of the tricot knitted fabric knitted using a tricot knitting machine having three ridges is brushed to obtain a suede-like appearance and feel. It is essential that the cutting rate is in the range of 25 to 45%. More preferably, it is 28 to 38%. By setting the complete cut rate by raising the front yarn to the above range, it is possible to obtain a suede-like skin material with good wear durability and dust adhesion prevention property and good texture. If the complete cut rate is less than 25%, the napped density is rough and the suede-like surface appearance may be inferior, and dust adhering to the front yarn part that is not completely cut by raising may be difficult to remove. There is. On the other hand, when the complete cut rate exceeds 45%, there is a possibility that the wear durability suitable for the vehicle application cannot be obtained.

  The complete cut rate referred to in the present invention is a value indicating the ratio of the multifilament yarn used for the front yarn being cut by raising, and is calculated by the following method.

As shown in FIG. 1 and FIG. 2, take an electron micrograph of the cross-section in the width direction of the tricot knitted fabric before raising (FIG. 1) and the cross-section in the width direction of the tricot knitted fabric after raising (FIG. 2). The height (A) of the front yarn 1 of the knitted fabric and the height (B) of the front yarn 1 that is not cut by raising the tricot knitted fabric after raising are measured. The complete cut rate is calculated from the measured value according to the following formula. In the figure, 2 indicates a ground structure formed by middle yarn and back yarn, and 3 indicates a raised pile of front yarn.
Complete cut rate (%) = (A−B) / A × 100

  Examples of the raising machine used in the raising process include a cloth raising machine and an emery raising machine. In the present invention, a raising method using a needle raising machine is preferable from the viewpoint of obtaining a suede-like surface appearance. A needle cloth raising machine in which counter pile rolls facing the opposite direction to the pile rolls facing the needle rotation direction in the direction of rotation of the cylinder are alternately arranged, and raising is preferably 0.4-0. In order to control the use of 6 dtex ultrafine fibers and the above-described predetermined range of the complete cut rate of the front yarn, it is preferable to repeat raising several times under weak raising conditions.

  The tricot knitted fabric obtained as described above can be provided with a function such as hygroscopicity, flame retardancy, deodorizing property, and antibacterial property to provide a suede-like skin material with further added value. The imparting method can be selected as appropriate. For example, when imparting flame retardancy, the flame retardancy can be obtained without affecting the surface appearance by subjecting the flame retardant to gravure treatment.

  The finished density of the suede skin material of the present invention is preferably 32 to 40 wells / inch and 55 to 70 courses / inch. If it is less than 32 wells / inch or 55 courses / inch, the density of the raised hair is low and the feeling of wrinkles is strong, and the appearance quality may be deteriorated. If the finished density is greater than 40 wells / inch, the length of the raised portion of the front yarn is shortened, and there is a possibility that the raising property may be deteriorated. Moreover, when it becomes larger than 70 course / inch, there exists a possibility that a fabric weight may become large and a feel may become hard.

  The suede-like vehicle skin material thus obtained has an excellent natural leather-like surface appearance, and has wear durability and dust adhesion prevention suitable for vehicle applications.

<Abrasion durability>
The test is performed using a flat wear tester as shown in FIG. One test piece 4 of the above-mentioned tricot knitted fabric is taken from each of the vertical and horizontal directions with a width of 70 mm and a length of 300 mm, and a urethane foam having a width of 70 mm, a length of 300 mm and a thickness of 10 mm on the back surface. Serve eight. In a state where the test piece 4 is spread and held by the presser 7, the surface of the test piece 4 is rubbed and worn with a weight 9.8N with a weight 5 by a friction element 6 covered with a cotton cloth. FIG. 4 shows the friction element 6, and a cotton cloth 6 a is put on the tip part having a curved surface with a predetermined radius. The friction element 6 is rubbed and worn by reciprocating 10,000 times at a speed of 60 reciprocations / minute for 140 mm (stroke) on the surface of the test piece 4.
Evaluation was performed as follows. Grade 4 or higher is accepted.
Grade 5: No change of state Grade 4: Slightly conspicuous wear surface, broken pile 3rd grade: Pile falls along the worn surface, Pile cut 2nd grade: Pile gathered and intertwined , Pile missing but ground yarn is invisible Level 1… Pile missing and ground yarn visible

<Dust adhesion prevention>
Three test pieces are collected with a width of 100 mm and a length of 100 mm. 0.3 g of cotton is arranged into a spherical shape having a diameter of about 5 cm and placed on the surface of the test piece, and the cotton ball is wrapped with the test piece. Put a set of three test pieces wrapped with cotton balls into a cylinder of a pilling meter (manufactured by Daiei Chemical Seiki Seisakusho), cover and rotate for 1 minute. Take out the test piece and shake it 10 times with the feeling of holding the end of the test piece and shaking off the dust. Use a pair of tweezers to remove large cotton chips of 5 mm or more remaining on the test piece. The obtained test piece was evaluated as follows. Grade 4 or higher is accepted.
5th grade: No dust adhesion 4th grade ... Dust adhesion is slightly recognized 3rd grade ... Dust adhesion is clearly recognized 2nd grade ... Dust adhesion is a little 1st grade ... Dust adhesion is considerable Remarkable

<Surface appearance>
Judgment was made visually.
Suede-like… Appearance that is close to natural suede, with no visible stitches or wrinkles on the base fabric.
Fabric-like ... The fabric can be seen as stitches and wrinkles on the base material of the skin material, and it can be clearly recognized as an artificial product.

[Example 1]
Using a tricot knitting machine with 28 gauges and 3 folds, a double yarn (single yarn fineness 0.57 dtex) of polyester 84dtex / 144f on the front heel, and a polyester 84dtex / 36f yarn on the middle heel and back heel , The organization is front 筬 1-0 / 3-4, middle 筬 1-0 / 1-2, back 筬 2-3 / 1-0, on the knitting machine with a course of 70 courses / inch Tricot knitted fabric Organized. The obtained knitted fabric was dyed with a disperse dye at 130 ° C. for 30 minutes by a liquid dyeing machine.

  Next, this knitted fabric is dried at 150 ° C. by a heat setter, and thereafter, a needle cloth raising machine having twelve pile needle cloth rollers and twelve counter pile needle cloth rollers is used. The brushing from the knitting end direction and the knitting start direction is performed 12 times alternately at 12 m / min, and finishing set is performed at 190 ° C. for 1 minute, the front thread is fully cut at 35%, and the finished density is 38 wells / minute. An inch, 62 course / inch suede-like vehicle skin material was obtained. Table 1 shows evaluations such as wear durability and dust adhesion prevention properties.

[Example 2]
The number of raising was 11 times, and the others were all the same as in Example 1, and a skin material for a suede-like vehicle having a front yarn cut rate of 28%, a finished density of 37 wells / inch, and 61 course / inch was obtained. It was. The evaluation is shown in Table 1.

[Example 3]
The same procedure as in Example 1 was performed except that the yarn used for the front fold was a double yarn of polyester 65dtex / 144f (single yarn fineness 0.45dtex) and the number of raising was 13 times, and the complete cut rate of the front yarn was 42%. A skin material for a suede-like vehicle having an hour density of 38 wells / inch and 63 courses / inch was obtained. The evaluation is shown in Table 1.

[Comparative Example 1]
The number of raising is 10 times, and the others are all the same as in Example 1, and a suede-like vehicle skin material with a front yarn cut rate of 20%, finished density of 34 wells / inch and 66 course / inch is obtained. It was. Since the complete cut rate was low, wrinkles on the base fabric were visible. The evaluation is shown in Table 1.

[Comparative Example 2]
The number of raising is 14 times, and the others are performed in the same manner as in Example 1 to obtain a suede-like vehicle skin material having a front thread cut rate of 50%, a finished density of 41 wells / inch, and 60 courses / inch. It was. Wear resistance was poor because the complete cut rate of the front yarn was large. The evaluation is shown in Table 1.

[Comparative Example 3]
Use a 28-gauge three-sheet tricot knitting machine, and use three yarns of polyester 56dtex / 72f (single yarn fineness 0.77dtex) for the front heel, and perform all other operations in the same manner as in Example 1. A suede-like vehicle skin material having a complete front thread cut rate of 32%, a finished density of 38 wells / inch, and 62 courses / inch was obtained. The pile yarn was thick and could not be seen as natural animal hair. The evaluation is shown in Table 1.

[Comparative Example 4]
Use a 28-gauge 3-sheet tricot knitting machine, use polyester 75dtex / 288f (single yarn fineness 0.26dtex) for the front heel, and perform all other operations in the same manner as in Example 1, and complete cut rate of the front yarn. A skin material for a suede-like vehicle having a finish density of 38 wells / inch and 62 courses / inch was obtained. Wear resistance was poor because the single yarn fineness of the front yarn was small. The evaluation is shown in Table 1.

The schematic enlarged view of the tricot knitted fabric cross section before raising. The schematic expanded view of the tricot knitted fabric cross section after raising. Explanatory drawing of a plane wear machine. The enlarged view of the friction element of a plane wear machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Front thread 2 ... Tricot knitted fabric 3 ... Brushed pile 4 ... Test piece 5 ... Weight 6 ... Friction element 6a ... Cotton cloth 7 ... Presser 8 ・ ・ ・ Urethane foam

Claims (2)

A vehicular skin material having raised front yarn of a tricot knitted fabric knitted using a tricot knitting machine having three ridges,
A vehicular skin material, wherein the front yarn is a multifilament yarn having a single yarn fineness of 0.4 to 0.6 dtex, and a complete cut rate by raising the front yarn is in the range of 25 to 45%. The skin material for vehicles according to claim 1, wherein the density of the raised pile is 40000 to 700000 pieces / 吋² .

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