JPH04352886A - Watermarked fabric - Google Patents

Abstract

PURPOSE:To obtain the subject watermarked fabric free from, even in case of extraction of an excellently designed fine pattern such as a stippled pattern, coming off of the residual fibers and capable of maintaining an excellent visual appearance over a long period. CONSTITUTION:Sheath-core structured polyester filament yarn having 1:1 area ratio thereof is produced by using a slightly alkali-soluble polyester-based polymer such as polytetramethylene terephthalate as the core component and a readily alkali-soluble polyester-based polymer such as a polymer synthesized by copolymerization between polyethylene terephthalate and 2.5mol% 5- sulfoisophthalic acid as the sheath component. Fabric is then woven by using the above-obtained polyester filament yarn as the warp and weft yarns and the resultant woven fabric is scoured and set. A pattern containing a fine stippled pattern, etc., is then printed thereon by using an alkali-containing etching paste and, after steaming, washing is carried out, thus obtaining the objective watermarked fabric.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention relates to a fabric having a watermark pattern, and is applicable to the field of clothing such as dresses and suits;
It is used in the interior field such as curtains and roll blinds as a product that has a beautiful appearance for a long time.

0002

[Prior Art] Conventionally, after knitting and weaving different types of fibers such as polyester fibers and cellulose fibers, or polyamide fibers and cellulose fibers, one of the fibers is skipped to create an openwork pattern on the knitted fabric. The forming method is called blanking processing or opal processing and is widely used. For example, a sizing agent containing sulfuric acid, aluminum sulfate, or acidic sodium sulfate is printed on a knitted fabric made of a mixture of polyester fibers and cellulose fibers, and the cellulose fibers are decomposed and extracted by heat treatment, etc., to create an openwork pattern on the knitted fabric. There is a way to get it. In addition, if different types of fibers are mixed with polyester fibers, the excellent functionality of polyester fibers will be inhibited, so in order to avoid this, 100% polyester fibers made of two types of polyester fibers with different alkali solubility are used. The processing of fabrics without meals was carried out by the special public authorities of 1983-275.
No. 18 and JP-A-63-15987.

However, in both methods, two types of fibers with different properties are used and one of them is extracted to obtain an openwork pattern, and the extracted threads are broken by the extraction and are not connected. . For this reason, when a detailed openwork pattern such as a tataki pattern with a high design quality is attached, the remaining parts are not retained as part of the fabric's structure and become lint, fuzz, dust, etc. during use. It has the disadvantage of falling off, and currently only simple patterns with poor design can be made.

0004

[Problems to be Solved by the Invention] The present invention was made in view of the current situation, and it is an object of the present invention to prevent the remaining fibers from falling off even when a finely designed pattern such as a tataki pattern is processed without cutting. Without,
The object of the present invention is to obtain a watermarked fabric that has a beautiful appearance forever.

[0005]

[Means for Solving the Problems] The present invention achieves the above object and has the following configuration. That is,
At least one of the threads constituting the fabric is a core-sheath type composite polyester multifilament yarn in which a polyester polymer with high alkali solubility is arranged in the sheath part and a polyester polymer with low alkali solubility is arranged in the core part. The gist of this invention is a watermark patterned fabric characterized by the polymer in the sheath portion being omitted.

The present invention will be explained in detail below. The fabric as used in the present invention refers to woven fabrics, knitted fabrics, nonwoven fabrics, etc. manufactured by ordinary machines. At least one of the yarns constituting the fabric of the present invention is a core-sheath type composite polyester in which a polyester polymer with high alkali solubility is arranged in the sheath part and a polyester polymer with low alkali solubility is arranged in the core part. It is a multifilament yarn and plays an important role in creating openwork patterns. Examples of polyester-based polymers with low alkali solubility include polymers consisting of polyesters containing terephthalic acid as the main acid component and alkylene glycol having 2 to 6 carbon atoms, preferably ethylene glycol or tetramethylene glycol as the main glycol component. can. On the other hand, polyester polymers with high alkali solubility include isophthalic acid, naphthalene dicarboxylic acid, diphenyl dicarboxylic acid, diphenoxyethane dicarboxylic acid, β-2-oxyethoxybenzoic acid, p- - 1 mol% to 15 mol% of a third component such as oxybenzoic acid, sebacic acid, adipic acid, oxalic acid, 1,4-cyclohexanedicarboxylic acid, 5-sodium sulfoisophthalic acid, trimellitic acid, pyromellitic acid, polyalkylene glycol, etc. Examples include polymers made of copolyesters copolymerized to some extent, and polymers made of polyesters blended with polyalkylene glycol and sodium alkylsulfonate in an amount of about 1 to 15% by weight.

The alkali solubility of each polymer is determined by spinning and drawing these polymers to form fibers using a normal method.
6 at 70°C in 00g/liter aqueous caustic soda solution.
After treatment for 0 minutes, from the weight before caustic soda treatment (A) and the weight after caustic soda treatment (B), ((A-B)÷A)×
It is preferable to use combinations of polymers that can be evaluated using the formula 100%) and have a difference in values of 10% or more. In the core-sheath type composite polyester multifilament yarn, it is preferable that the cross-sectional area ratio of the sheath portion is 20 to 80%. If it is less than 20%, it will be difficult to clearly show the watermark pattern.
If it exceeds 80%, the strength of the uneaten portion becomes too small, which is not preferable.

The fabric of the present invention may be composed only of the core-sheath type composite polyester multifilament yarn, but
It may be used in combination with a multifilament yarn made only of the polyester polymer with low alkali solubility, or with fibers with even lower alkali solubility than the polyester polymer with low alkali solubility. The fibers to be used can be determined depending on the desired pattern, texture, etc.

[0009] A desired openwork pattern is applied to the fabric designed and manufactured according to the above concept with a cutting starch containing a chemical that easily dissolves the sheath portion of the core-sheath type composite polyester multifilament yarn, such as an alkali-containing cutting starch. The area to be obtained is stamped, steamed and
The fabric of the present invention can be obtained by washing. When an alkali is used, examples of the alkali include alkali metal hydroxides, carbonates, bicarbonates, and the like. Further, examples of the sizing agent used include tracanth gum, methyl cellulose, carboxymethyl cellulose, naphka crystal gum, and sodium polyacrylate. The fabric of the present invention can be obtained by printing a desired pattern on a fabric using the above-mentioned cutting starch using a printing machine such as an autoscreen, and subjecting the fabric to steaming and washing treatment.

0010

[Function] In the fabric to be subjected to starch processing, at least one of the constituent threads is made of a core in which a polyester polymer with high alkali solubility is arranged in the sheath part and a polyester polymer with low alkali solubility is arranged in the core part. When used as a sheath-type composite polyester multifilament yarn, even after the extraction process, only the polymer in the sheath part of the yarn is extracted and the core remains unbroken, making it easy to print fine patterns. Even when the fabric is cut, the threads do not fall out and the beautiful and delicate pattern can be maintained.

[0011]

[Example] Polymer made by copolymerizing polytetramethylene terephthalate in the core and polyethylene terephthalate in the sheath with 2.5 mol% of 5-sulfoisophthalic acid (difference in alkali solubility between the core and sheath polymers) is 19.
Polyester filament yarn with a total denier of 100 denier and a number of filaments of 48, with a core-sheath structure and an area ratio of 1:1, was used as the warp and weft, with a warp density of 90 threads/inch and a weft density of 85. I wove this fabric in the water jet loom.

[0012] After refining and setting this fabric, a pattern with a fine tatami pattern was printed on the flower and leaf portions using an autoscreen using a paste having the following formulation 1. After printing, the fabric was steamed at 175°C for 10 minutes and further washed to obtain a fabric of the present invention. [Prescription 1] ・Sodium alginate (paste agent) 60 parts・
Caustic soda (38 baume) 30 parts/water
10 copies

The obtained fabric had an openwork pattern in which the sheath part of the polyester multifilament yarn having a core-sheath structure in the printed part including the beaten pattern part was dissolved and removed, leaving the core part. Massage the handle of the tataki,
Even when I rubbed it, the threads on the handle did not fall off.

As a comparison, a polytetramethylene terephthalate filament yarn of 100 denier 48 filaments was used for the warp, and a filament yarn of 100 denier 48 filament made of a polymer obtained by copolymerizing polyethylene terephthalate with 2.5 mol% of 5-sulfoisophthalic acid was used for the weft. Weaving, refining, setting, printing, and
A fabric of a comparative example was obtained by steaming and washing. In the fabric of the comparative example, the weft threads in the printed area were dissolved and removed, and when the beating handle was rubbed or rubbed, the remaining weft threads fell off from the fabric.

[0015]

[Effects of the Invention] In the fabric of the present invention, at least one of the constituent threads has a polyester polymer with high alkali solubility arranged in the sheath part and a polyester polymer with low alkali solubility arranged in the core part. The fabric of the present invention is made of a core-sheath type composite polyester multifilament yarn, and the polymer in the sheath part is blanked out by printing with an alkali-containing blanking paste to express an openwork pattern. Even in the case of a fine pattern such as a tataki pattern, the threads remaining after the pattern is removed will not fall off, and the beautiful appearance can be maintained forever.

Claims (1)

[Claims] Claim 1: At least one of the yarns constituting the fabric is a core-sheath type composite in which a polyester polymer with high alkali solubility is arranged in the sheath part and a polyester polymer with low alkali solubility is arranged in the core part. An openwork patterned fabric made of polyester multifilament yarn, characterized in that the polymer in the sheath part is cut out.