KR950000474B1 - Color change fabric - Google Patents

Abstract

The complex spinning fiber having the surface area of fiber of over 7900 cm2/g and the shrinkage percentage of 8.5% and constisting of polyamide and polyester to have 60 denier/36 filament is used as a covering yarn. A high shrinkage yarn of copolyester having the dry shrinkage percentage of 15% (reached by dry heating polyester having the boiling shrinkage percentage of 12% for 15 min. at 180 deg.C) is used as core yarn. A covering and core yarn is plaited threads and used as weft and wrap yarn. A weft and wrap yarn is woven to a plain weave. A plain weave is dyed for 50 at 130 deg.C and is dipped in 1.5% solution of KONION OP-10 as a suction agent and heated for 15 sec. at 175 deg.C with a pin tenter.

Description

Absorption discoloration paper

1 is an explanatory diagram of light reflection

The present invention relates to an absorbing discolorable supercell paper that can easily distinguish between a dry state and an absorbed state when a color change is large when water is absorbed.

Bedclothes of conventional hospitals and group facilities are mostly absorbent cotton, most of which are colorless white or pale colored.

Such forge is white when it is contaminated with various contaminants including water, and the color is colored, so the color does not change significantly. There was no inconvenience to touch and check one by one.

In addition, the conventional cotton noodle is not only easy to breed microorganisms such as bacteria and fungi due to the characteristics of the material, there was a problem that the cotton noodle itself is easily damaged.

In addition, cotton cloth is not only easy to generate dust, but also has poor dryness when absorbing water, and thus has many unsanitary characteristics.

Therefore, the present invention as a complement to the shortcomings of the cotton cloth, such as bed sheets that are also used in hospitals and group facilities as follows.

In general, the color of the fabric is determined by the intrinsic color of the material, but the synthetic fiber has a phenomenon that the apparent color concentration decreases as the fiber thickness becomes thinner, as shown in Equation (Ⅰ) below. The more ultra-thin synthetic yarn is used, the apparent color becomes softer than the intrinsic color saturation of dyed synthetic fibers, and the difference becomes larger.

Below

Sa = K … … … … … … … … … … … … … … … … … … … … … … … … … … (Ⅰ)

Where Sa: apparent color of synthetic fiber a

Da: fineness of synthetic fiber a

k: apparent color constant

Also, as in the first diagram, the light reflection of an object decreases the surface specular light that becomes white as the light refractive index decreases, while the transmitted light or internal reflection light that appears as coloring increases and appears darker. As shown in), most of the synthetic fibers have a high optical refractive index, which makes the apparent color appear thinner, especially polyester fiber, which is the thinnest. On the other hand, water has an extremely low surface reflectivity and is in contact with other objects. Colors have individual light properties that appear very dark.

TABLE 1 Refractive index of object (n ∥) and surface specular reflectance (R)

In other words, when microfiber is used among synthetic yarns, the apparent color concentration visible to the naked eye appears extremely light compared to the intrinsic color at the time of dyeing, but when the fiber comes into contact with water, the water is wrapped around the surface of these fibers, thus refraction. Is affected by the refractive index of water, so the surface reflectance is extremely low and the colored light such as internal reflection light and transmitted light is relatively high, making it appear dark.

In addition, in order to increase the color difference between the before and after contact with water, the constituent fibers are bulky (BULKY) as possible and contain as much air as possible, the color in the dry state will appear very thin.

Therefore, in the present invention, a microfiber yarn, which is a material sensitive to bulkiness and color change, may be any synthetic fiber having a fiber surface area of 5000 cm 2 or more per g, and more preferably, having a radial cross section composed of polyester and polyamide. Composite spinning is not only relatively high because the fiber surface area at the same fineness is formed after splitting than other fibers with round cross-section, but the dyeing of one component is less dyeing even if the dyeing amount of the two components is different or dyeing technique is used. It can also be more effective because it can be dyed in different colors.

In addition, microfiber yarn or extractive composite fiber may be used by a general spinning method, but any one of the three oils must have a surface area of 5000 cm 2 / g or more, and if less than this, the color change upon contact with water is low. These microfibers were mixed with high shrink yarns so that the materials used were in the bulky state of the diaxial blending islands, and the apparent dyeing was extremely low.

The high shrinkage yarn used in the present invention was produced by copolymerizing a specific compound such as dimethyl isophthalate to enable active high shrinkage in a normal polyester polymerization process, and boiling heat shrinkage treatment (100 ° C. hot water x 15 minutes treatment) and dry heat shrinkage It is a high shrinkage yarn in which the sum of the heat shrinkage rates by the treatment (180 占 폚 x 15 minutes treatment) satisfies 18% to 32% on the final processed paper.

If the shrinkage is less than 18%, there is no effect of improving the bulkiness, and if it exceeds 32%, it is difficult to manufacture due to a large amount of cuts due to the addition of a large amount of copolymer.

The high shrink yarn can be spliced together with the microfiber yarn by the air turbulence method, or twisted 120T / M to 800T / M can be used in the form of twisted yarn. In addition, the blending ratio of microfiber yarns and high shrinkage yarns should be 60% by weight or more, thereby increasing the air tightness of the paper and softening the surface feel of the paper as well as reducing the apparent dyeing effect due to the bulkiness.

In the present invention, the bulkiness should satisfy 2.5 cm 3 / g to 3.5 cm 3 / g.

In addition, these microshrink microfiber materials should be used as all of warp and weft yarns or on one side of warp or weft yarns, and when used only in one direction, they should be used so that the bishrink microfiber materials should be at least 60% by weight or more than other materials. If less than 60% by weight, the color difference induced effect is less.

The discoloration characteristic of the forge according to the present invention should have absorption discoloration characteristics in which the colorimetric data satisfies at least two or more of the following formula (II).

(1) ΔL≥25

(2)? A? … … … … … … … … … … … … … … … … … … … … … … … … (Ⅱ)

(3) ΔB≥25

Where ΔL is the difference in brightness change before and after contact with water,

ΔA: The difference in change of red-green color before and after contact with water,

ΔB: The difference in the color of the cyan color before and after contact with water,

If this is not satisfactory, the color difference before and after water absorption is small and the object of the present invention cannot be achieved.

Therefore, the forge of the present invention can be easily observed with the naked eye without directly touching whether or not the dirt mainly composed of water is buried in the forge.

In addition, since the forge of the present invention is made of ultra-fine synthetic fiber filament yarn, there is no dust generation of the forge itself compared to the cotton spun yarn material and has quick drying property.

Evaluation of the bulkiness of the yarn was calculated by measuring the spun yarn in boiling water for 15 minutes and then heat-processing the yarn for 5 minutes with 180 ° C. dry heat by JIS 1079 and 1018.

Example 1

The fiber surface area is 7900cm2 / g or more, and has a radial cross section of 60 denier 36 filaments composed of polyamide and polyester component, and the cover yarn is made of a split type ultra-fine composite fiber (fiber A) having a boiling shrinkage of 8.5%. In addition, a high shrinkage yarn 40 denier 24 filament (fiber B) having a boiling shrinkage of 12% as a polyester and a heat treatment of boiling water was further heat-treated at 180 ° C. for 15 minutes to achieve high shrinkage by heat treatment. After screening, weaving (fiber C) by normal air cutting method and using it as warp and weft yarn. Weaving and weaving density is 140 weave / inch and 76 weave / inch. Dye for 50 minutes at 130 ℃ using the following dyes for dyeing each color. After immersing in 1.5% aqueous solution of KONION OP-10 (made by Korea Polyol) as an absorbent As the emitter was subjected to heat treatment at 175 ℃ 15 seconds.

Dye by Color

Example 2

After the warp yarns were made of polyester 75 denier 72 filament twisted yarns, the weft yarns were fabricated with a fiber C of Example 1, and the warp and weft density were woven into 150 weaves / inch and 90 weaves / inch of plain weave. It carried out similarly to Example 1.

Example 3

The weft yarn is made of polyester 75 denier 72 filament twisted yarn, and the warp yarn is made of the fiber C of Example 1, and the density of the warp yarn and weft yarn is woven into 140 weaves / inch and 93 wefts / inch, and then the post-processing process is carried out. It carried out similarly to Example 1.

Example 4

In the blending method of Example 1, blending with fiber B was carried out in the same manner as in Example 1, using a polyester 140 denier 432 filament yarn having a surface area of 5027 cm 2 / g instead of fiber A, and using this as a warp and weft density. Weaved into 120 weaves / inch and 60 weaves / inch, and after a series of refining processes, reduced weight to 23%, and then using KAYALON POLYESTER BLUE TS 0.8% (owf) as a dye. Staining was carried out at 50 ° C. for 50 minutes, and post-process conditions were the same as in Example 1.

Comparative Example 1

The warp and weft yarns were woven with 40'S cotton using 80's / inch and 78's / inch plain weave, and after a series of refining processes, they were dyed and dried using PROCION BLUE H-EGN, a reactive dye.

Comparative Example 2

The fiber A of Example 1 was woven into 155 weaves / inch and 88 weaves of plain weave as warp and weft as it is single yarn, and the post-processing conditions were the same as in Example 1.

Comparative Example 3

Weaving warp and weft yarns using polyester 75 denier 72 filament false twisted yarn to 150 weaves / inch and 93 weaves / inch of plain weave, respectively, and then dye KAYALON POLYESTER BLUE TS 0.8% (owf) as a dye. The dyeing was carried out at 130 ° C. for 50 minutes, and the post process conditions were the same as in Example 1.

Comparing the characteristics of each of the forge produced by the above Examples and Comparative Examples are shown in Table 2.

TABLE 2

Claims (3)

A dyed synthetic fiber cloth, wherein the absorbent color change paper, characterized in that all or part of the light, weft yarn is a blended yarn that satisfies the following conditions. next A) composition of blended yarn; Synthetic fiber filament yarn with a surface area of 5,000 cm2 / g or more and high shrinkage synthetic fiber filament yarn with boiling shrinkage (boiling shrinkage rate + dry heat shrinkage rate) of 18% to 32% B) the blending ratio of blended yarns; The blending ratio of micro filament yarn is 60% by weight or more The absorbent discolorable cloth according to claim 1, wherein the synthetic fiber microfilament yarn is obtained by dividing the split composite fiber. The absorbing discolorable paper according to claim 1, wherein the blended yarn is air-crossed.