JP2007063691A - Antistatic fabric and skin material for car seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antistatic fabric having excellent antistatic durability without deteriorating the flexible texture of the fabric, and to provide a skin material for car seats. <P>SOLUTION: This antistatic fabric is characterized by obtaining a fabric containing modified organic fibers having dents in the cross section of each single fiber and, if necessary, furthermore intermittently containing conductive fibers in the warp direction and/or in the weft direction, and then applying an antistatic processing treatment to the fabric. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an antistatic fabric having excellent antistatic durability without impairing the soft texture of the fabric, and a car seat skin material.

  Conventionally, various methods for adding antistatic properties to fabrics have been proposed. For example, it is proposed to impart antistatic properties to the fabric by treating the fabric with a treatment agent containing the antistatic composition, or to apply antistatic processing to the antistatic fabric in which conductive fibers are intermittently arranged. (For example, refer to Patent Document 1 and Patent Document 2). However, although the antistatic fabric obtained by such a method has antistatic properties without impairing the soft texture of the fabric, it cannot be said that the antistatic durability is sufficient.

In addition, it is also known to impart antistatic properties by blending carbon in the backing layer of a pile fabric, but there is a problem that not only the soft texture of the fabric is impaired but also the material cost is increased. It was.
On the other hand, in Patent Document 3, it is proposed to obtain a fabric using a fiber having a concave portion in a single yarn fiber cross section. However, such a fabric is not antistatic but intended to improve water absorption. It was.

Japanese Patent Laid-Open No. 10-325076 JP 2005-113345 A JP 2002-201541 A

  The present invention has been made in view of the above background, and an object thereof is to provide an antistatic fabric and a car seat skin material having excellent antistatic durability without impairing the soft texture of the fabric. It is in.

  The present inventor made a fabric with atypical organic fibers having a recess in the cross section of the single yarn fiber, and applied the antistatic treatment to the fabric, so that the antistatic agent was held in the recess, and an excellent control was achieved. The present invention has been achieved by finding that electric durability can be obtained and further studying it.

According to the present invention, there is provided “an antistatic fabric characterized in that it includes an odd-shaped organic fiber having a recess in a single yarn fiber cross section and is subjected to an antistatic processing.”
In that case, in the said recessed part, it is preferable that the opening depth S defined below is 30% or more.
(Opening depth S)
It calculates using the following formula from the length L of the opening part of the recessed part in the single yarn fiber cross section, and the maximum depth H of the recessed part.
S (%) = H / L × 100
In such atypical organic fiber, it is preferable that three or more recesses exist in the cross section of the single yarn fiber. The atypical organic fiber is preferably a polyester fiber.

  In the antistatic fabric of the present invention, the fabric is preferably a pile fabric, and the atypical organic fiber is preferably contained in the ground texture portion and / or the pile portion. Moreover, it is preferable that conductive fibers are intermittently arranged in the warp direction and / or the weft direction as fibers other than the atypical organic fibers. At that time, the conductive fiber is preferably a fiber containing carbon black. The interval between the conductive fibers is preferably in the range of 2 to 50 mm. Moreover, it is preferable that the mixture ratio of a conductive fiber is 3% or less by weight ratio.

In the antistatic fabric of the present invention, it is preferable that 1 to 10% by weight of the polyester antistatic composition is applied to the fabric weight by antistatic processing. Moreover, it is preferable that it is 3000V or less by a human body voltage test. Furthermore, after the plane wear test is performed, it is preferably 3000 V or less according to the frictional voltage test method defined in JIS L1094.5.2, in which only the test environment is changed to 10 ° C. and 30% RH. However, the plane abrasion test is a method in which the cloth to be tested is cut into a size of 20 cm × 3 cm and a load of 9.8 N (1.0 kgf) is applied and rotated 10,000 times according to the JIS L 0894 Gakushin Tester method. And
Moreover, according to this invention, the skin material for car seats containing the said antistatic fabric is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the antistatic fabric which has the antistatic durability outstanding without impairing the soft texture of a fabric, and the skin material for car seats are provided.

  First, in the antistatic fabric of the present invention, it is important to include an atypical organic fiber having a recess in the cross section of the single yarn fiber. If such atypical organic fibers are not included in the fabric, it is not preferable because sufficient antistatic durability cannot be obtained.

Here, as the recess, in the cross section of the single yarn fiber, as shown in FIG. 1, the length of the opening of the recess is L, the maximum depth of the recess is H, and the opening depth S ( %), The opening depth S is preferably 30% or more. Thus, when the deep recessed part is formed, an antistatic agent is hold | maintained at this recessed part, and the outstanding antistatic durability is obtained.
S (%) = H / L × 100

  Further, in the atypical organic fiber, it is sufficient that at least one recess is formed in the cross section of the single yarn fiber, but it is preferable that three or more (more preferably four, that is, a cross section) is formed.

  The organic fibers referred to in the present invention are organic natural fibers such as cotton, wool and hemp, organic synthetic fibers such as polyester, nylon, and polyolefin fibers, organic semi-synthetic fibers such as cellulose acetate fibers, and viscose rayon fibers. The organic regenerated fiber is selected, and the type is not particularly limited.

  As such an organic fiber, a polyester fiber is preferable in terms of fiber strength and handleability. The polyester fiber is produced from a dicarboxylic acid component and a diglycol component. As the dicarboxylic acid component, terephthalic acid is preferably used mainly, and as the diglycol component, it is preferable to use at least one alkylene glycol selected from ethylene glycol, trimethylene glycol and tetramethylene glycol. Further, the polyester may contain a third component in addition to the dicarboxylic acid component and the glycol component. As the third component, cationic dye dyeable anion components such as sodium sulfoisophthalic acid; dicarboxylic acids other than terephthalic acid such as isophthalic acid, naphthalenedicarboxylic acid, adipic acid, sebacic acid; and glycol compounds other than alkylene glycol, For example, at least one of diethylene glycol, polyethylene glycol, bisphenol A, and bisphenol sulfone can be used.

  Matting agent (titanium dioxide), micropore forming agent (organic sulfonic acid metal salt), anti-coloring agent, heat stabilizer, flame retardant (antimony trioxide), fluorescent whitening as needed One or more of an agent, a coloring pigment, an antistatic agent (sulfonic acid metal salt), a hygroscopic agent (polyoxyalkylene glycol), an antibacterial agent, and other inorganic particles may be contained.

  The form of the organic fiber is not particularly limited, and may be either a long fiber (multifilament) or a short fiber, but a long fiber is preferable for obtaining a soft texture. Furthermore, normal false twist crimping, twisting, and interlaced air processing may be applied. The fineness of the organic fiber is not particularly limited, but in order to obtain a soft texture, the single fiber fineness is preferably 0.1 to 5 dtex, the number of filaments is 20 to 150, and the total fineness is preferably 30 to 300 dtex.

In addition, the antistatic fabric of the present invention may contain one type of the atypical organic fiber or two or more types. Further, the antistatic fabric of the present invention does not need to be composed of only the above-mentioned atypical organic fiber, and it is sufficient that the atypical organic fiber is contained in an amount of 10% by weight or more.
In the antistatic fabric of the present invention, the fabric structure is not particularly limited, and may be a woven fabric or a knitted fabric.

  Here, the woven structure of the woven fabric is a three-fold structure such as plain weave, oblique weave, satin weave, etc. Examples include vertical pile weaves such as fresh velvet, towels and velours, bevel pile weaves such as benjin, weft velvet, velvet and call heaven. In addition, the textile fabric which has these woven structures can be woven by a normal method using normal looms, such as a rapier loom and an air jet loom.

The type of knitted fabric may be a weft knitted fabric or a newly knitted fabric. Preferred examples of the weft knitting structure include flat knitting, rubber knitting, double-sided knitting, pearl knitting, tuck knitting, float knitting, one-sided knitting, lace knitting, bristle knitting, and the like. Preferred examples include single atlas knitting, double cord knitting, half tricot knitting, back hair knitting, jacquard knitting and the like. The knitting can be knitted by a normal method using a normal knitting machine such as a circular knitting machine, a flat knitting machine, a tricot knitting machine, and a Raschel knitting machine.
Among these, it is preferable that the fabric is a pile fabric, and that the atypical organic fiber is included in the ground texture portion and / or the pile portion of the pile fabric.

In the antistatic fabric of the present invention, as other fibers, it is preferable that conductive fibers are intermittently arranged in the warp direction and / or the weft direction to further improve the antistatic property. Here, the conductive fiber means one having a surface electrical resistance value of 10 ¹⁰ Ω / cm or less. Specifically, metal-coated organic fibers coated with metal by plating or vacuum deposition, conductive resin-coated organic fibers coated with resin in which conductive fine particles such as carbon black are dispersed, conductive fine particles dispersed by composite spinning technology Examples thereof include a composite fiber in which a polymer is blended or composite-spun. Of these, conductive organic fibers containing a conductive material such as carbon black in a fiber-forming polymer such as polyester or polyamide (such as nylon 6) are preferred in terms of durability and texture.

  Such conductive organic fibers may be included alone in the fabric as they are, or may be mixed, twisted and covered with other organic fibers such as polyester fibers, polyamide fibers and polyolefin fibers and included in the fabric. Good.

Examples of the method of intermittently arranging the conductive fibers include a method of sewing the conductive fibers into a fabric using a commercially available sewing machine or the like, and a method of preferably weaving and knitting the fabric in advance.
For example, in the case of woven fabrics, conductive fibers are mixed with other fibers as necessary, twisted yarns, covered, and then arranged at regular intervals on the fabric, or wefts on the loom Is preferably performed. In the case of a knitted fabric, it is preferable that a part of the yarn to be fed is knitted as a conductive yarn. Among these, a pile woven or knitted fabric composed of a ground tissue portion and a raised portion is extremely preferable. When the conductive fibers are intermittently arranged in the ground tissue portion and the napped portion contains a part of the conductive fibers (preferably 0.1 to 3 wt% in the mixed portion in the napped portion), the conductivity contained in the napped portion is included. Since the yarn comes into contact with the human body, extremely excellent antistatic properties can be obtained.

The interval at which the conductive fibers are arranged is preferably in the range of 2 to 50 mm (more preferably 3 to 30 mm). If the distance is larger than 50 mm, there is a possibility that excellent antistatic properties cannot be obtained. On the contrary, if the distance is smaller than 2 mm, the flexible texture may be impaired.
Furthermore, the ratio of the conductive fibers contained is preferably 3% or less (more preferably 0.1 to 2.5%) by weight.

The antistatic fabric of the present invention is obtained by subjecting the above fabric to antistatic processing. As such an antistatic processing, an ordinary antistatic agent may be applied to the fabric by an ordinary post-processing treatment.
Examples of such antistatic agents include resin-type antistatic agents obtained by graft-polymerizing polyethylene glycol as a hydrophilic component and acrylic polymer or polyester, and polyalkylene glycol (for example, polyethylene glycol) units (groups) and 4 A polyurethane resin for antistatic processing comprising a compound having an antistatic performance such as a secondary ammonium base and having at least two isocyanate groups, and a sulfonate disclosed in JP-A-10-325076 Examples thereof include an antistatic agent comprising a quaternary ammonium salt and an imidazolinium salt. Of these, polyester antistatic agents are extremely suitable from the viewpoint of durability. In particular, when a polyester fiber is selected as the organic fiber, excellent durability can be obtained.

  The method for applying the antistatic agent to the fabric is not particularly limited, and a method of forming a resin film on at least one side of the fabric by a padding method, a dry coating method, a wet coating method, a laminate method, or the like, For example, a method of applying an antistatic agent in the same bath.

  For example, first, a treatment liquid containing an antistatic agent is prepared. At that time, the concentration of the antistatic agent in the treatment liquid is suitably in the range of 0.1 to 15 wt% (more preferably 1 to 8 wt%). Moreover, you may add a catalyst and a finishing agent, for example, a water repellent, a softening agent, a flame retardant, an antibacterial deodorizing agent, etc. in this process liquid as needed. Then, it may be dried at a temperature of 80 to 140 ° C. for 1 to 30 minutes, and further heated (cured) at 160 to 180 ° C. for 0.5 to 3 minutes as necessary.

  In addition, when applying an antistatic agent in the same bath as the dyeing, for example, when the organic fiber is a polyester fiber, in addition to a normal disperse dye, a dye containing an antistatic agent, a leveling agent, a pH adjuster, etc. Dyeing is performed in an aqueous solution at 100 to 135 ° C. for 20 to 70 minutes.

  The weight percent of the antistatic agent applied in this manner is preferably 1 to 10% by weight (more preferably 2 to 6% by weight) with respect to the fabric. If the adhesion amount is less than 1% by weight, sufficient antistatic property may not be obtained. On the other hand, if the amount of adhesion is greater than 10% by weight, the soft texture may be impaired.

  In addition, for the fabric to which the antistatic agent is applied, if necessary, a normal weight reduction process with a weight loss rate of about 5 to 40%, and further a conventional water absorption process, water repellent process, brushed process, shearing, Various processings that impart functions such as ultraviolet shielding or antibacterial agents, deodorants, insect repellents, phosphorescent agents, retroreflective agents, and negative ion generators may be additionally applied.

  In the antistatic fabric thus obtained, the antistatic agent is held in the recesses present in the cross section of the single yarn fiber, and therefore exhibits excellent durability and antistatic properties without impairing the soft texture of the fabric. The antistatic property is preferably 3000 V or less (more preferably 50 to 2600 V) in the human body voltage test method (test environment condition: 10 ° C., 30% RH). In addition, after the plane wear test, it is preferably 3000 V or less in the frictional voltage test method defined in JIS L1094.5.2, in which only the test environment is changed to 10 ° C. and 30% RH. However, the plane abrasion test is a method in which the cloth to be tested is cut into a size of 20 cm × 3 cm and a load of 9.8 N (1.0 kgf) is applied and rotated 10,000 times according to the JIS L 0894 Gakushin Tester method. And

  Next, the car seat skin material of the present invention includes the antistatic fabric described above. Since the car seat skin material is usually used without being washed, the car seat skin material exhibits excellent antistatic properties over a long period of time.

EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail, this invention is not limited at all by these. In addition, each physical property in an Example is measured with the following method.
(1) Human body withstand voltage test method After a person wearing a woolen garment sits on a fabric placed on a vehicle seat, moves the waist to the left and right, and repeats the friction motion between the seat and the human body 10 times. The body withstand voltage at the time of standing up and standing up was measured (n number = 3), and the presence or absence of impact on the human body was evaluated in four stages: shock level: large, present, small, none (best) (test environment condition: 10 ° C. , 30% RH).
(2) Wear test The cloth to be tested was cut into a size of 20 cm × 3 cm by the JIS L 0894 Gakushin tester method, and a load of 9.8 N (1.0 kgf) was applied and rotated 10,000 times.
(3) Friction Withstand Voltage In the JIS L 1094.5.2 measurement method, only the test environment condition was changed to 10 ° C. and 30% RH, and the friction withstand voltage (V) was measured by n number 3.
(4) Texture (hardness)
Sensory evaluation was performed by three testers, and was evaluated in three stages: “good” (excellent softness), “normal”, and “bad” (hard).

[Example 1]
Using an ordinary tricot warp knitting machine, a polyethylene terephthalate multifilament with a total fineness of 84 dtex / 36 fil in the cross section in which a recess having an opening depth S of 30% or more exists in the back ridge (B), middle ridge 1 (M1) In addition, a normal polyethylene terephthalate multifilament having a total fineness of 84 dtex / 36 fil, middle cocoon 2 (M2), conductive thread 25-3 (product name: cell cut, carbon black-containing fiber, surface electric resistance 10E ⁷ Ω) / Cm), ordinary polyethylene terephthalate multifilaments having a total fineness of 165 dtex / 96 fil are arranged on the front ridge (F), and B: 1, 2-1, 0 / M1: 1,0 according to the knitting diagram shown in FIG. −1, 2 / M2: (1, 0−1, 2) * 7 times repeat + (1, 0−5, 6) / F: After knitting the tricot velor fabric so as to be 1, 0-5, 6, normal raising process was performed, and at that time, the broken line portion (AA ') in FIG. .

Next, the fabric was subjected to conventional refining and relaxation treatment, and then the disperse dye Kayalon Polyester Scarlet GS (Nippon Kayaku Co., Ltd.) 3.5% owf and polyester antistatic agent (Nika Chemical) Industrially manufactured, Nicepole PR-86) Antistatic fabric (57 course / 2.54 cm, 35) at a concentration of 10% owf, dyeing and antistatic treatment in a bath for 60 minutes at a temperature of 130 ° C. Whale / 2.54 cm) was obtained. In such a fabric, conductive fibers were intermittently arranged in the warp direction at intervals of 15 mm in the ground tissue portion, and some of the conductive fibers were included in the raised portions. In addition, the polyethylene terephthalate multifilament having a cross-section was included in the ground tissue portion.
The obtained antistatic fabric had extremely excellent antistatic durability, with a body withstand voltage of 2200 V before the wear test, no shock, and a friction withstand voltage of 2600 V after the wear test. The texture was also “good”.

[Comparative Example 1]
Example 1 was the same as Example 1 except that polyethylene terephthalate multifilaments having a total fineness of 84 dtex / 36 fil in a normal round cross section were used instead of polyethylene terephthalate multifilaments having a total fineness of 84 dtex / 36 fil in a cross-section. .
The obtained antistatic fabric had insufficient body antistatic durability, with a body withstand voltage of 2520 V before the wear test, no shock, and a friction withstand voltage of 3500 V after wear. The texture was “good”.

  ADVANTAGE OF THE INVENTION According to this invention, the antistatic fabric which has outstanding antistatic durability, and the skin material fabric for car seats without impairing the soft feel of a fabric are provided, The industrial value is very large.

It is a cross-sectional view of the single fiber (filament) for demonstrating the measuring method of opening depth S. FIG. FIG. 2 is a knitting diagram used in Example 1.

Explanation of symbols

L Length of recess opening H Maximum depth of recess

Claims (13)

  An antistatic fabric characterized by comprising an odd-shaped organic fiber having a concave portion in a cross section of a single yarn fiber and subjected to antistatic processing. 2. The antistatic fabric according to claim 1, wherein an opening depth S defined below is 30% or more in the recess.
(Opening depth S)
It calculates using the following formula from the length L of the opening part of the recessed part in the single yarn fiber cross section, and the maximum depth H of the recessed part.
S (%) = H / L × 100   The antistatic fabric according to claim 1 or 2, wherein the odd-shaped organic fiber has three or more recesses in a cross section of the single yarn fiber.   The antistatic fabric according to any one of claims 1 to 3, wherein the atypical organic fiber is a polyester fiber.   The antistatic fabric according to any one of claims 1 to 4, wherein the fabric is a pile fabric, and the atypical organic fiber is contained in the ground tissue portion and / or the pile portion.   The antistatic fabric according to any one of claims 1 to 5, wherein conductive fibers are intermittently arranged in the warp direction and / or the weft direction as fibers other than the atypical organic fibers.   The antistatic fabric according to claim 6, wherein the conductive fiber is a fiber containing carbon black.   The antistatic fabric according to claim 6 or 7, wherein the intermittent interval of the conductive fibers is within a range of 2 to 50 mm.   The antistatic fabric according to any one of claims 6 to 8, wherein a mixing ratio of the conductive fibers is 3% or less by weight.   The antistatic fabric according to any one of claims 1 to 9, wherein the antistatic composition is provided with 1 to 10% by weight of the polyester antistatic composition based on the weight of the fabric.   The antistatic fabric according to any one of claims 1 to 10, which is 3000 V or less by a human body voltage test method. 12. The friction band voltage test method defined in JIS L1094.5.2, in which only the test environment is changed to 10 ° C. and 30% RH, is 3000 V or less after performing the planar wear test. An antistatic fabric according to claim 1.
However, the plane abrasion test is a method in which the cloth to be tested is cut into a size of 20 cm × 3 cm and a load of 9.8 N (1.0 kgf) is applied and rotated 10,000 times according to the JIS L 0894 Gakushin Tester method. And   The skin material for car seats containing the antistatic fabric in any one of Claims 1-12.

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