JPH01171936A - Nappy tone destaticizing knitted cloth - Google Patents

Abstract

PURPOSE:To obtain nappy tone destaticizing knitted cloth which possesses sufficient electric shockproof capacity and is easy in manufacture and superior in durability, by a method wherein a conductive foamed material is stuck to the back of the knitted cloth obtained by mixing by a specific quantity of conductive fiber with pile yarn or the pile yarn and homespun thread. CONSTITUTION:Nappy tone destaticizing knitted cloth is obtained by sticking a conductive foamed material 6 to the back of the knitted cloth obtained by mixing a 0.01-5wt.% conductive fiber into pile yarn 1 or the pile yarn 1 and homespun thread 2. When a mixed quantity of the conductive fiber is less than 0.01wt.%, a sufficient conductive effect is not obtained and when the same exceeds 5wt.% an appearance is spoiled and cost is increased also. A matter obtained by mixing a conductive particle such as a carbon particle 7 or a metallic particle with a base material by making resin such as polyurethane or polyethylene the base material and expanded is used as the conductive foamed material 6. The mixing quantity in case of using the carbon particle is 10wt.% or more to the foamed material in case of furnace type carbon particle and 3wt.% or more to the foamed material in case of Ketjen type carbon particle. A usual practice such as adhesion or hot fusion may be used for sticking the conductive foamed material.

Description

[Detailed description of the invention] industrial applications” The present invention relates to a napped antistatic knitted fabric.

[Conventional technology]

Static electricity charged on woven fabrics, knitted fabrics, sheets, etc. can cause electric shock to the human body, contamination due to adsorption of dust in the air, adhesion due to mutual attraction of charged objects, ignition due to discharge, etc. Various woven fabrics, knitted fabrics, sheets, and the like have been proposed to prevent electrification.

Specific examples are given below.
Publication No. 331 discloses that the pile is made of synthetic fibers with an electric specific resistance of 1011n or less at 40% RH, a primary backing layer (resin or rubber) containing 2 to 30% by weight of a surfactant, and A carpet with improved antistatic properties at low humidity is disclosed, which is provided with a backing layer made of a secondary backing layer (resin or rubber) containing α05 to 30% by weight of a good conductor.

Japanese Patent Publication No. 57-54390 discloses that 2 to 50 weight parts of a surfactant is added to the backing layer (resin or rubber) of a carpet made of highly conductive synthetic fibers with an electrical resistivity of 10,140 or less at 40 inches RH. % and 1 to 30% by weight of a fibrous good conductor with a specific resistance in the range of 102Ωm to 10−6Ω.
A carpet with improved antistatic performance at low humidity is disclosed.

Furthermore, Japanese Utility Model Application Publication No. 19587/1987 discloses that some or all of the silk threads forming loops that are not exposed on the surface of the knitted fabric are coated with electrically conductive powder made of electrically conductive fine powder, resin, and/or various rubbers on the surface of chemical fibers. Electrical resistance value: 10
Use conductive fibers or threads containing the same with a resistance of 9 Ω/1 or less, and use the conductive fibers or the threads containing the same as Q, 5 to 10 ct.
An antistatic knitted fabric is disclosed which is knitted at intervals of n.

Utility Model Publication No. 51-88676 discloses that 2 to 100 de=
- When sewing, weaving or embedding a conductive yarn consisting of two or more filaments and an organic fiber into a fabric in a striped or stepped manner, the mixing ratio of conductive filaments in the yarn x (weight 8%) and the distance y (mm) between the threads sewn or knitted in a striped or stepped shape are expressed by the following formula (■)
:y2≦100X −s o (1) (However, X≦
30) An antistatic fabric that satisfies the following is disclosed.

Additionally, the applicants have previously made several proposals regarding antistatic sheet fabrics.

That is, in Utility Model Application Publication No. 57-172088,
Several strands of anti-static fiber containing 13 to 2% carbon black particles are twisted together and combined with regular yarn to create a knit fabric back for vehicle seats, which consists of a front layer, middle layer and back layer. 10-3 layers of regular yarn
We have proposed an antistatic sheet fabric in which the antistatic fibers are alternately knitted at a ratio of 1 to 0.

In addition, in Japanese Utility Model Application Publication No. 60-40497, a pile containing 1 to 7 conductive fibers and a pile containing 1 to 5% conductive fibers are disclosed.
A backing material (resin) containing 20 to 50 inches of carbon black fine particles, a pile woven fabric made with the ground yarn contained therein, or a woven fabric made of constituent yarns having the same composition as the above-mentioned ground yarn.
We have proposed an antistatic sheet fabric that consists of

Furthermore, in Japanese Utility Model Application Publication No. 62-26745, a sheet fabric was proposed in which water was impregnated in a fabric woven from a yarn mixed with conductive fibers and coated with carbon backing (resin).

[Problem that the invention seeks to solve]

However, the carpets disclosed in Japanese Patent Publication No. 54-25331 and Japanese Patent Publication No. 57-3410 have a complicated structure, and also have a highly rigid backing layer (lining layer) made of resin or rubber. This results in problems such as the texture becomes stiff and the design is impaired, and workability during sewing becomes worse and quality deteriorates (frequent wrinkles).

Antistatic knitted fabric disclosed in Japanese Utility Model Application Publication No. 19587/1987, Utility Model Application No. 5
Antistatic fabric and Utility Model Application Publication No. 1-88676, 1988-17
When imparting antistatic properties by knitting conductive fibers or threads as in the sheet fabric of Japanese Patent No. 2088, it is difficult to obtain a sufficient effect, especially when the relative humidity is low.

Furthermore, Utility Model Application No. 60-40497 and Utility Model Application No. 62-2
Since the sheet fabric disclosed in Japanese Patent No. 6745 has a resin backing material containing fine carbon black particles, it is not sufficient in terms of fabric design and sewing workability.

On the other hand, a method is also known in which the entire sheet surface material to which antistatic properties are to be imparted is post-treated using a surfactant.
Durability cannot be expected, and color fading may occur, which is undesirable in terms of design.

The present invention is intended to solve the above-mentioned problems in the prior art, and its purpose is to provide a product that has sufficient electric shock prevention performance, is easy to manufacture, has no defects in design and sheet a, and is durable. An object of the present invention is to provide an excellent antistatic knitted fabric with napped control.

[Failure to solve the problem]

That is, the napped antistatic knitted fabric of the present invention is characterized in that a conductive foam material is attached to the back side of the knitted fabric in which conductive fibers are mixed in the pile yarn or the pile yarn and the ground yarn in an amount of α01 to 5% by weight. .

Conductive fibers are commercially available products such as Luana (manufactured by Toshi ■), Mega (manufactured by Unitika), and Thunderon 0 (manufactured by Japanese silk wool).
etc. can be used. The mixing amount is limited to 101 to 5 weight % because a sufficient antistatic effect cannot be obtained with α01 weight groove, and if it exceeds 5 weight %, problems such as spoiling the appearance and increasing cost occur.

As the conductive foam material, a foamed material made of a resin such as polyurethane or polyethylene mixed with conductive particles such as carbon particles or metal particles is used. When carbon particles are used, the mixing amount is 10% by weight or more, preferably about 20% by weight or more, based on the foaming material for furnace type carbon particles, and 20% by weight or more for Ketschien type carbon particles relative to the foaming material. The amount is 3% by weight or more, preferably about 5 to 6% by weight.

The amount of carbon particles mixed in is 10% by weight for furnace type.
If the number is less than 3 or less than 3 times in the Ketchien type, a sufficient antistatic effect will not be obtained.

Conventional means such as adhesion, heat sealing, etc. may be used to attach the conductive foam to the knitted fabric.

[For production]

By attaching a conductive foam material to the back side of a knitted fabric mixed with a predetermined amount of conductive fibers, the conductivity of the entire fabric is improved.
It can have sufficient antistatic effect and durability, and there are no design or sewing defects.

〔Example〕

The present invention will be explained in further detail in the following Examples and Comparative Examples. Note that the present invention is not limited to the following examples.

Example 1 As shown in Fig. 2, the double raschel structure, which is common among napped-like knitted fabrics (both pile yarn 1 and ground yarn 2, use polyester two-layered Tetron ■ (100d/36f)), was transferred to the third pile system. 1.5% by weight of conductive fiber 3 (East Luana TO: 4 is polyester, 5 is carbon) shown in the figure is mixed, and on the back side, conductive (polyurethane) foam material 6 (carbon particles 7 are mixed: electricity). Resistance: 2 to 5 x 10 4 Ω, Everlite EP foam (manufactured by Bridgestone ■) All adhesive lamination was performed to obtain a napped antistatic knitted fabric (seat skin material) of the present invention shown in FIG.

Example 2 Example 1 except that 05% by weight of conductive fiber 3 was mixed.
A knitted fabric of Example 2 was obtained in the same manner as above.

Example 3 Conductive (polyurethane) foam material 6 (furnace type carbon particles 7 mixed in the same amount as polyurethane resin: IM, air resistance 2 to 5 x 10 on the back side of the same skin material as in Example 1)
40, Valve MTP maltbren color form HPE-
F) I-frame (thermal bonding) lamination was performed to obtain the knitted fabric of Example 50.

Example 4 The same conductive (polyurethane) foam material 6 as in Example 3 was frame-laminated on the back side of the same skin material as in Example 2 to obtain the knitted fabric of Example 4.

Comparative Example 1 A knitted fabric (sheet skin material) with a double raschel structure (same as that of Example 1, but not containing the conductive fibers 3), which is common among napped-like knitted fabrics.

Comparative Example 2 A silk cloth obtained in the same manner as in Example 1 except that the conductive (polyurethane) foam material 6 was not attached.

Comparative Test The antistatic properties of the knitted fabrics of Examples 1 to 4 and Comparative Examples 1 and 2 were tested. Antistatic properties were determined by placing a knitted fabric (seat skin material) on a vehicle seat and determining the electrostatic potential (human body electrostatic potential) and the degree of electric shock when a person wearing woolen clothing stood up from the seat. The test environment was 20° C. and 40% relative humidity. The results are shown in Table 1 below.

Table 1 Antistatic test results for various knitted fabrics (seat skin materials) As is clear from Table 1, the knitted fabric of the present invention has a lower human body charge voltage than the knitted fabric of the comparative example, so the electric shock sensation is extremely small. .

〔Effect of the invention〕

As mentioned above, the napped antistatic knitted fabric of the present invention has conductive fibers of 101 to 5 fk in the pile yarn or the pile yarn and ground yarn.
Since the conductive foam material is attached to the back side of the knitted fabric in which the foam is mixed, it has sufficient electric shock prevention performance and durability. Furthermore, since the foamed material is flexible, there are no problems in terms of design or sewing of the sheet. Furthermore, it is easy to manufacture.

Furthermore, as a secondary effect, it prevents the adhesion of dust when cutting the skin material or on the actual vehicle, and also prevents the operator from being charged with electricity when sewing the seat.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of one embodiment of the napped antistatic knitted fabric of the present invention, Fig. 2 is an explanatory diagram of a double raschel structure, and Fig. 3 is a cross-sectional diagram in a direction perpendicular to the length direction of conductive fibers. It is. In the figure, 1... Pile yarn 2... Ground yarn 3... Conductive fiber 4... Polyester 5... Carbon 6... Conductive foam material 7... Carbon particle patent applicant Toyota Jidosha Co., Ltd. Kawashima Textile Co., Ltd.

Claims (1)

[Claims] 0.00% conductive fiber in pile yarn or pile yarn and ground yarn
A napped antistatic knitted fabric characterized by having a conductive foam material attached to the back side of the knitted fabric containing 1 to 5% by weight of the fabric.