Woven fabrics and hospital gowns

Abstract

To provide a fabric in which a base fabric and a conductive yarn are dyed using a dyeing method different from each other so that dyeing difference is suppressed, and thereby a streaky appearance of a surface is improved and a defect in a warp streak is hardly conspicuous.SOLUTION: A woven / knitted fabric is obtained by using both one or more types of conductive yarns / antistatic yarns and a spun-dyed yarn which contain a cation-dyeable polymer as a main ingredient. The fabric has a triboelectric charge amount of 7 μC or less and a light-fastness of 6 grade or more.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a woven or knitted fabric and a hospital gown that minimize the streaks that appear when conductive or antistatic yarns are inserted, and achieves both antistatic performance and high light fastness by optimizing the yarn composition. [Background technology]

[0002] Conductive threads and highly durable antistatic materials and clothing that use conductive threads (e.g., Patent Document 1) have been widely used for some time. However, by inserting threads with a different composition from the base fabric, the parts where the conductive threads or antistatic threads are inserted appear streaked from the dyeability and physical standpoints, damaging the quality. In particular, when used on thin to medium-weight fabrics, the streaks are noticeable, causing quality issues.

[0003] One approach to solving this problem is to use different materials for the base fabric and the inserted threads and dye them with different dyes, but it is still difficult to improve the streaky appearance because one dye can stain other threads. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Re-tabled publication 2017-69100 Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, the object of the present invention is to provide a woven / knitted fabric and a hospital gown in which the appearance of streaks on the surface is improved, which is a problem with woven / knitted fabrics using conductive yarn, by dyeing the base fabric and the conductive yarn using different dyeing methods, thereby suppressing the difference in dyeing and making the defects of warp streaks less noticeable. [Means for solving the problem]

[0006] In order to solve the above problems, the woven or knitted fabric of the present invention has the following configuration. A woven or knitted fabric using one or more conductive and antistatic yarns, mainly composed of cationic dyeable polymers, and dope-dyed yarns, with a triboelectric charge of 7μC or less and a light fastness of grade 6 or higher. At least one of the conductive yarn and the antistatic yarn is mixed or twisted with a cationic dyeable polyester yarn, and the woven or knitted fabric is dyed with a cationic dye. The woven or knitted fabric is characterized in that

[0007] The hospital gown of the present invention has the following configuration. A hospital gown characterized by using the above woven or knitted fabric.

[0008] In the woven or knitted fabric of the present invention, the cationic dyeable polymer preferably contains cationic dyeable polyester as a main component.

[0009] The woven or knitted fabric of the present invention is a fabric in which one or more of conductive yarns and antistatic yarns are mixed or twisted with cationic dyeable polyester yarns. do.

[0010] The woven or knitted fabric of the present invention is the woven or knitted fabric dyed with a cationic dye. do. Effect of the Invention

[0011] The present invention improves the streaky appearance that occurs in the longitudinal direction of the inserted conductive yarn or antistatic yarn in woven or knitted fabrics that use conductive yarn or antistatic yarn, and solves the problem of poor light fastness that arises when cationic dyes are used, making it possible to simultaneously solve the three problems mentioned above: amount of triboelectric charge, light fastness, and design. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The dyed yarn in the present invention is a general dyed yarn obtained by known means such as a colored multifilament yarn or spun yarn obtained by kneading colored particles such as pigments when spinning synthetic fibers. Examples of cationic dyeable polymers include acrylic fibers and cationic dyeable polyesters, with cationic dyeable polyesters being preferred. Regarding conductive yarns and antistatic yarns, conductive yarns containing white metal particles or carbon black in part of the fibers and antistatic yarns containing antistatic polymers can be used, but in the present invention, conductive yarns using white metal-containing particles are more preferred. The conductive yarns are 1.0×10 3 It is a yarn with a specific resistance of 1.0×10 10 This refers to yarn with a resistivity of less than Ωcm, and is generally obtained by incorporating a special polymer into the fiber. The resistivity of ordinary polyester fiber is 10 13 It is about Ωcm.

[0013] The yarns constituting the woven or knitted fabric are not particularly specified, and any one or more of conductive yarns and antistatic yarns with cationic dyeable polymer as the main component, as well as dope-dyed yarns, can be used regardless of whether it is woven or knitted. By using these in combination, it is possible to achieve the target triboelectric charge of 7μC or less and light fastness of grade 6 or higher.

[0014] The cationic dyeable polyester in the present invention can be obtained by copolymerizing 1.0 to 3.0 mol % of a 5-sodium sulfoisophthalic acid component with ordinary polyester.

[0015] In the present invention, the use of at least one of the conductive yarn and the antistatic yarn, which is mixed or twisted with the cationic dyeable polyester yarn, enhances the color homogeneity of the two yarns during dyeing and improves the quality of the product. Necessary For the blending or twisting, known means can be used.

[0016] The woven or knitted fabric of the present invention is dyed with a cationic dye, from the viewpoint of suppressing the staining of the original dyed polyester on the surface and improving the quality. Necessary When disperse dyes are used as a method for dyeing woven or knitted fabrics, the dope-dyed yarn arranged on the front side and the cationic dyeable polyester arranged on the back side are dyed, resulting in a difference in dyeing between the two, and therefore the streaky appearance is not improved, which is unsuitable. For this reason, a method of dyeing only one or more of the cationic dyeable polyester conductive yarn and the antistatic yarn is preferred, and when one or more of the conductive yarn and the antistatic yarn are blended or twisted with the cationic dyeable polyester yarn as one or more of the conductive yarn and the antistatic yarn, a method of dyeing only the blended or twisted yarn is preferred. In other words, it is preferable not to dye the dope-dyed yarn. As a specific method, a method of dyeing with a general cationic dye is sufficient, and it is more preferable to adjust the dyeing conditions so as to match the color of the dope-dyed yarn that is not dyed.

[0017] Specific preferred applications of the woven or knitted fabric of the present invention include hospital white gowns which are required to have high color development and are used under more severe washing conditions. EXAMPLES

[0018] Next, the woven or knitted fabric of the present invention will be described in detail with reference to examples. (Evaluation method) (1) Light fastness Evaluation was carried out using both the JIS L 0842 ultraviolet carbon arc lamp method (third exposure method) and JIS L 0843 (xenon arc lamp method: ISO method). In the table of evaluation results, poor results are indicated as a series. (2) Frictional Electrification Charge The evaluation was carried out according to JIS L 1094 C method (frictional charge quantity measurement method). (3) Appearance The appearance was judged based on whether or not streaks were visible by visual inspection by three evaluators. Items judged by two or more experts to not look streaky were marked with an O, and items that looked streaky were marked with an X.

[0019] Example 1 Both the warp and weft threads were dyed false twisted yarns (75 decitex, 72 filaments) made of polyethylene terephthalate, and the conductive yarns were made by twisting together white conductive yarns made of cationic dyeable polyester and cationic dyeable polyester yarns, which were inserted into the warp threads at 1 cm intervals. The fabric was plain weave. The fabric was dyed using a cationic dye with a jet dyeing machine. The evaluation results are shown in Table 1. The fabric had a light fastness of grade 8, a triboelectric charge of 6 μC, and an excellent appearance. Example 2 A twill fabric was obtained and dyed under the same conditions as in Example 1, except that the weave was changed to 2 / 1 twill. The evaluation results are also shown in Table 1. The light fastness was grade 7, the triboelectric charge was 6 μC, and the fabric had an excellent appearance. Example 3 A plain double woven fabric was obtained and dyed under the same conditions as in Example 1, except that the weave was changed to a double-layered plain weave. The evaluation results are also shown in Table 1. The light fastness was grade 8, the triboelectric charge was 5 μC, and the fabric had an excellent appearance. Example 4 A simple double knit was made using a dope-dyed false twist yarn (75 decitex, 72 filaments) made of polyethylene terephthalate, with a white conductive yarn made of cationic dyeable polyester and a double-twisted yarn made of cationic dyeable polyester yarn inserted by plating (placing yarn knitting). It was dyed using a cationic dye and a liquid jet dyeing machine. The evaluation results are shown in Table 1. It had a light fastness of grade 6, a triboelectric charge of 4 μC, and an excellent appearance. Comparative Example 1 A plain woven fabric was obtained under the same conditions as in Example 1, except that the dope-dyed polyethylene terephthalate yarn was changed to uncolored polyethylene terephthalate yarn (75 decitex, 72 filaments), and dyed using a disperse dye with a jet dyeing machine. The evaluation results are also shown in Table 1. The light fastness was grade 5, and the triboelectric charge was 4 μC, which were poor results, and the appearance was also poor. Comparative Example 2 A plain woven fabric was obtained under the same conditions as in Example 1, except that the conductive yarn was changed to a ply-twisted yarn of carbon black-containing polyethylene terephthalate conductive yarn and cationic dyeable polyester yarn, and dyed using a cationic dye with a liquid jet dyeing machine. The evaluation results are also shown in Table 1. The light fastness was grade 6, and the triboelectric charge was 5 μC, but the appearance was poor. Comparative Example 3 A plain woven fabric was obtained under the same conditions as in Example 1, except that the polyethylene terephthalate dope-dyed yarn was changed to cationic dyeable polyethylene terephthalate uncolored yarn (75 decitex, 72 filaments), and dyed using a cationic dye with a liquid jet dyeing machine. The evaluation results are also shown in Table 1. The triboelectric charge was 5 μC, but the light fastness was poor at grade 2-3, and the appearance was also poor. Comparative Example 4 A twill fabric was obtained under the same conditions as in Example 2, except that the polyethylene terephthalate dope-dyed yarn was changed to uncolored polyethylene terephthalate yarn (75 decitex, 72 filaments), and dyed using a disperse dye in a jet dyeing machine. The evaluation results are also shown in Table 1. The triboelectric charge was 6 μC, but the light fastness was poor at Grade 4, and the appearance was also poor. Comparative Example 5 A twill fabric was obtained under the same conditions as in Comparative Example 4, except that the conductive yarn was changed to a ply-twisted yarn of carbon black-containing polyethylene terephthalate conductive yarn and cationic dyeable polyester yarn, and dyed using a disperse dye with a jet dyeing machine. The evaluation results are also shown in Table 1. The triboelectric charge was 5 μC, but the light fastness was poor at Grade 4, and the appearance was also poor. Comparative Example 6 A twill fabric was obtained under the same conditions as in Comparative Example 5, except that no conductive yarn was used, and was dyed using a disperse dye in a jet dyeing machine. The evaluation results are also shown in Table 1. The triboelectric charge was 13 μC, the light fastness was poor at grade 4-5, and the appearance was also poor. Comparative Example 7 A double knit was obtained under the same conditions as in Example 4, except that the polyethylene terephthalate dope-dyed yarn was changed to uncolored polyethylene terephthalate yarn (75 decitex, 72 filaments), and dyed using a disperse dye in a liquid jet dyeing machine. The evaluation results are also shown in Table 1. The appearance was excellent, and the triboelectric charge was also excellent at 6 μC, but the light fastness was poor at grade 4. Comparative Example 8 A plain double woven fabric was obtained under the same conditions as in Example 3, except that the polyethylene terephthalate dope-dyed yarn was changed to uncolored polyethylene terephthalate yarn (75 decitex, 72 filaments), and dyed with a disperse dye using a jet dyeing machine. The evaluation results are also shown in Table 1. The triboelectric charge was excellent at 5 μC, but the light fastness was poor at grade 5, and the appearance was also poor.

[0020] [Table 1] [Industrial Applicability]

[0021] The present invention can be applied not only to hospital gowns, but also to general uniforms and clothing that require high light resistance, antistatic properties, and quality.

Claims

1. A woven or knitted fabric using one or more of conductive yarns and antistatic yarns mainly composed of cationic dyeable polymers and dope-dyed yarns, characterized in that the triboelectric charge amount is 7 μC or less and the light fastness is grade 6 or higher, one or more of the conductive yarns and antistatic yarns are blended or twisted with cationic dyeable polyester yarn, and the woven or knitted fabric is dyed with a cationic dye.

2. A woven or knitted fabric, wherein the cationic dyeable polymer according to claim 1 is mainly composed of cationic dyeable polyester.

3. A hospital gown using the woven or knitted fabric according to claim 1 or 2.

Images