JPH0443318Y2 - - Google Patents

Description

[Detailed explanation of the idea]

B. Field of Industrial Application The present invention relates to a material for making dust-free clothing that is used when it is necessary to carry out work while preventing the generation and contamination of dust. Dust-free clothing is required in clean rooms in the semiconductor industry and work in the pharmaceutical and medical fields. B. Prior Art and Problems As mentioned above, dust-free clothing is designed to prevent the generation and contamination of dust by wearing overalls that only expose a small part of the wearer's face, hands, etc. while covering the rest of the wearer's body. OVERALL), so the so-called "environment inside the garment" becomes a problem. In other words, the dust-free outer garment must have sufficient moisture permeability to prevent the wearer from getting steamed up by his own sweating. At the same time, it should have properties that make it difficult for external dust to adhere to it as much as possible. Dust-free clothing is generally used as outer clothing, so the dust contained in the inner clothing should not leak to the outside. Furthermore, the clothing has physical characteristics that allow it to easily follow body movements that require not only precision work but also large movements. etc., but none have been satisfied yet. For example, Utsukai Showa 61-2412
It is indicated that a knitted fabric with a laminated resin layer having an elongation of 15% or more should be used, and that a moisture-permeable urethane resin should be used as the laminated resin.
For dust-free clothing, elongation of 50% or more is desired. However, high elongation alone is not sufficient for use as work outerwear; excessive deformability (Young's modulus) is also required. C. Means and action for solving the problem The inventors of the present invention have conducted various studies and found that when laminating a moisture-permeable urethane resin onto a knitted fabric, if the laminated resin contains an inorganic conductive filler powder, it will not be charged. Not only does it reduce dust adhesion due to a decrease in dust resistance, but it also has the effect of adjusting moisture permeability in areas where it is necessary to adjust moisture permeability.In other words, when dust-free clothing is worn,
Sweat from the wearer has a large effect on certain parts of the dust-free garment, but in other parts it may be better to adjust the moisture permeability. It has been found that this is effective in such cases, and that even if the material is dust-free and has an elongation of 50% or more, it has appropriate motion followability or deformability as a working outer garment. The moisture permeable urethane resin in the present invention is, for example, an amino acid-urethane obtained by reacting a diisocyanate with a low polymerized ester produced from a polyamino acid, which is a polymer of amino acids such as glutamic acid, alanine, and aspartic acid, dicarboxylic acid, and glycol. A copolymer, a polyether urethane containing polyethylene oxide as a hydrophilic component and a reaction product of diisocyanate and a diol, or a siloxane-modified polyether urethane containing a polydialkylsiloxane component. The conductive filler in the present invention includes, for example, tin oxide, antimony oxide, zinc oxide, aluminum oxide powder, or titanium oxide,
Silica powder, potassium titanate coated, or conductive carbon powder, and the above-mentioned coating type is preferred. Also,
The blending amount is about 10 to 40% based on the solid content of the resin. In addition to the above-mentioned filler, a coloring agent or the like may be used as necessary. In the present invention, the base knitted fabric is a knitted fabric made of natural and rigid fibers or a blend thereof;
Including alternate knitting, at least one of the vertical and horizontal elongation is 50% or more. Formation of Laminated Knitted Fabric -1 Moisture permeable (conductive moisture permeable) urethane layer containing conductive filler. Thickness: usually 5 to 40μ (microns), preferably
10 to 30μ, elongation; elongation of 200% or more. -2 Adhesive layer. Uses moisture-permeable urethane polypolymer. thickness;
10 to 40μ, preferably 15 to 30μ. -3 Lamination method The preferred method for laminating the knitted fabric substrate and the conductive moisture permeable urethane layer is usually a transfer method. That is, the above-mentioned urethane paint is first applied to the release paper and dried to form a resin layer, then an adhesive paint is applied on this resin layer, and the knitted fabric is coated in a dry or undried state. Crimp. Thereafter, it is aged for 12 to 48 hours and the release paper is peeled off. The amount of conductive and moisture permeable urethane mentioned above is usually 30 to 30.
200g/ ^m2 , its viscosity is 2000~10000cps/ ^200c
is desirable. The amount of adhesive urethane above is usually
40 to 200g/ ^m2 , and its viscosity is 1000 to 200g/m2.
10000cps/ ^200c is desirable. Also, the drying temperature is 60~
130 ^0c is fine. D Example As a conductive moisture permeable urethane paint, moisture permeable polyether urethane (viscosity 40000 cps/20 ^0c , concentration 25
%) 100 parts (parts are parts by weight) of powder containing tin oxide and antimony oxide as the main components as a conductive agent.
15 parts and then 40 parts of dimethylformamide to give a viscosity of 5000cps/ ^200c , which was applied to a release paper of 70g/ ^m2 and dried at ^1000c to give a thickness of
A 20μ resin layer was obtained. Next, polyether-based crosslinkable urethane (viscosity 40,000 cps/
^200c , concentration 50%) 100 parts, crosslinking agent 10 parts, accelerator 2
parts, and 40 parts of toluene, and its viscosity is
5000cps/ ^200c was applied on the resin layer in an amount of 80g/
m ² was applied and dried at 80 ^{0 C} to obtain an adhesive layer with a thickness of 25 μ. Then, a nylon knitted fabric (elongation: 200% vertically, 250% horizontally) was crimped onto it. Then 60 ^0c
After aging for 24 hours, the release paper was peeled off to obtain a laminated knitted fabric for dust-free clothing. The properties of this laminated knitted fabric are as follows. Elongation: 149% vertically, 218% horizontally (JIS-L-1096A) Moisture permeability: 2650g/m ² /24hr (JIS-Z-0208) Frictional voltage: 110volt (JIS-L-1094B) Surface leakage resistance: 7X10 ⁶ Ω (JIS-L-1094) The cross section of this laminated knitted fabric is shown in FIG. In the figure, 1 is a laminated knitted fabric, 2 is a knitted fabric base containing an inorganic filler 2a, 3 is an adhesive layer, and 4 is an electrically conductive moisture permeable resin layer. A dust-free garment 5 as shown in FIG. 2 was sewn using the above laminated knitted fabric. The overalls with long sleeves and long pants completely cover the arms, legs, and torso, and can be put on and taken off using a fastener 6 attached to the front. The upper and lower cuffs and sleeves are made to fit tightly around the wrists and ankles through magic fasteners or elastic cords 7. The head is covered with a hood 8 made of the same material, the wearer's eyes, nose and mouth are exposed at the part 8a, and the end of the hood is tightly fitted around the neck by a collar 9 with a magic fastener. In addition, as illustrated in FIG. 2A (shown as a circular cut-out diagram), each stitch 1
In case 0, a tape 11 made by laminating a urethane film on the same knitted fabric was heat-pressed to the seam to seal the seam from the inside. In a wear test of the dust-free garment of the present invention, the garment of the present invention was clearly superior to the wearer's evaluations as compared to conventional garments that do not employ conductive inorganic powder. The results of the dust generation test when wearing the dust-free clothing of the present invention are shown in Table 1. The test method is based on the human body dust measurement method of JIS-B-9923-1986.

【table】

【table】 [Brief explanation of the drawing]

FIG. 1 shows a cross section of a laminated knitted fabric according to the present invention. FIG. 2 is a front view illustrating a dust-free garment sewn using the laminated knitted fabric according to the present invention, and FIG.
FIG. 2 is a partially extracted view for explaining the seam portion of the above-mentioned dust-free garment. In the figure, 1... Laminated knitted fabric, 2... Laminated resin, 4...
...Knitted fabric base, 5...Dust-free garment.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A laminated knitted fabric with an elongation of 50% or more, in which a moisture-permeable urethane resin layer containing a conductive filler is laminated on the surface of the knitted fabric. (2) In claim 1 of the utility model registration claim, the laminated knitted fabric has a moisture permeability of 2500g/m ² /24hr or more. (3) In claim 1 of the utility model registration, the laminated knitted fabric has a surface leakage resistance of 10 ⁹ Ω or less.