Dustproof clothing

detailed description

[0071] Example 1

[0072] 【Preparation composition ZN(OH) 2 -Ti 3 (PO 4 ) 4 -TiO 2 】

[0073] An aqueous solution (60 g) of titanium sulfate (with a concentration of 30 wt%) was added to 1 liter of distilled water, and the resulting solutions were mixed. In this mixed solution, an aqueous solution of phosphoric acid (approximately 98 g) (with a concentration of 15 wt%) was added dropwise, and a white precipitate was obtained by mixing. Further, 50.3g of zinc sulfate (ZnSO 4 ·7H 2 O), and stir. In the resulting opaque aqueous solution, an aqueous solution of sodium hydroxide (concentration 15% by weight) was added dropwise, and the pH was adjusted to 7.0 by mixing to obtain a white precipitate mixture containing Zn(H)-Ti(IV). To the product containing the mixture of precipitates, titanium tetrachloride (37g) was added dropwise and stirred, then an aqueous solution of sodium hydroxide (concentration 15wt%) was added dropwise, and the pH was adjusted to 7.0 by mixing to obtain an oxide containing Titanium deposits. The resulting precipitate is filtered, thoroughly washed with warm deionized water, dried, and ground into particles with an average particle size of no more than 120 microns, thus obtaining a composition containing zinc hydroxide, titanium phosphate, and titanium dioxide. The weight ratio [ZN(OH) 2 /Ti 3 (PO 4 ) 4 /TiO 2 ] Is 38/28/34.

[0074] [Manufacture of fiber]

[0075] The composition obtained by the above method was added to the DMIS-modified polybutylene terephthalate (PBT) at a ratio of 5% by weight relative to the total weight [with 2.5 mol% relative to the total dicarboxylic acid component In the copolymer modified with dimethyl isophthalate (DMIS)], the mixture is extruded and kneaded by conventional methods to obtain pellets. The above-mentioned PBT pellets and pellets for fibers composed of conventional PET (polyethylene terephthalate) were fiber-shaped by the sheath-core structure conjugate melt spinning method, where the sheath/core ratio was 50 /50 (weight ratio), PBT pellets and PET pellets are used as the skin component and core component, respectively. Further, the obtained fiber is subjected to drawing and false twisting processes to obtain a textured yarn with a circular cross-section. The yarn is composed of composite continuous fiber yarns (multifilaments) with a sheath-core structure (167 dtex) , 48 filaments (F), monofilament fiber fineness is 3.5 dtex, twist: 0T/m).

[0076] [Fabric manufacturing]

[0077] The textured yarn composed of composite continuous fiber yarns with a sheath-core structure obtained by the above method and ordinary polyester (110 dtex, 48 filaments, monofilament fiber fineness: 2.3 dtex, twist: 100T /m) continuous fiber composed of textured yarn as weft and warp respectively, to make the fabric weight 126g/m 2 (Thickness: 0.22 mm under a pressure of 23.5 kPa) 2/3 twill weave fabric. Incidentally, conductive filaments (multifilaments, 44 dtex, 8 filaments) having a sheath-core structure are woven into the fabric at intervals of 1 cm, wherein the sheath-core conductive filaments have nylon 6 as the core. Components, nylon 9T as the leather component. The nylon 6 contains 33% by weight of conductive carbon. Nylon 9T is a polyamide derived from terephthalic acid as a dicarboxylic acid unit, 1,9-nonanediamine and 2-methyl-1,8-octanediamine. A mixture of amines [mixing molar ratio (1,9-nonanediamine/2-methyl-1,8-octanediamine) of 8/2] is used as the diamine unit. The weight ratio of core to skin is 13/87. The wire is composed of four regions as the core component in the cross section of the wire. The dust collection efficiency of the fabric is 84.7%, and the air permeability is 15.5 cm/sec.

[0078] [Manufacture of dustproof clothing]

[0079] The two-piece suit with a hood for the absolute clean room made from the above fabric meets the standard of the commercial dust-proof clothing in Comparative Example 1. The wearing comfort test was completed by ten workers. Under an 8-hour working condition with a room temperature of 25 degrees Celsius and a humidity of 60% RH (relative humidity), all the wearers did not feel hot and humid, and felt very comfortable to wear even when sweating. Therefore, the clothes are appreciated.

[0080] Example 2

[0081] 2/3 twill weave, fabric weight is 133g/m 2 (Thickness: 0.23 mm when the pressure is 23.5 kPa) The fabric is made of the following materials, using the composite filament with the sheath-core structure prepared in Example 1 and the continuous fiber composed of conventional polyester Textured yarn (167 dtex, 48 filaments, monofilament fiber fineness: 3.5 dtex, twist: 0T/m) is alternately used as weft yarn, and a textured yarn (110 dtex) composed of conventional polyester continuous fibers , 48 filaments, monofilament fiber fineness: 2.3 dtex, twist: 100T/m) as the warp. Incidentally, the same conductive yarn having a sheath-core structure as in Example 1 was woven into the fabric at an interval of 1 cm. The dust collection efficiency of the fabric is 82.7%, and the air permeability is 9.8 cm/sec. Using this fabric, the dust-proof clothing was manufactured in the same manner as in Example 1, and similar to Example 1, the wearing comfort test was completed by ten workers. Under the same working conditions as in Example 1, in particular, all the wearers did not feel hot and humid, and felt comfortable to wear even when sweating. Therefore, the clothes are appreciated.