JPS5988914A - Polyester filament yarn having improved color developing property and production thereof - Google Patents

Abstract

PURPOSE:To obtain the titled filament yarns having improved feeling and durability, by passing drawn polyester filament yarns consisting essentially of ethylene terephthalate through a heater at a specific relaxing ratio and heater temperature, and hot-stretching the resultant filament yarns under specific conditions. CONSTITUTION:A drawn polyester filament yarn 1 consisting essentially of ethylene terephthalate is fed to yarn supply feed rolls 2 and passed through a heater 3 at 180-245 deg.C while fully relaxed within 10-50% relaxing ratio between the feed rolls 2 and a heated roll 4 and heat-treated. The heat-treated yarn 1 is then hot-stretched between the heated roll 4 and stretching rolls 5 within the glass transition temperature - softening point range at 5-30% total relaxing ratio and then wound into a pirn 6 to give the aimed filament yarn having >=1.390 (g/cm<3>) yarn specific gravity (rho), 150-170(X10<-3>) birefrigence (DELTAn), >=7.5% shrinkage (S) in boiling water and <=15% black color developing value (L).

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polyester filament yarn with excellent color development and a method for producing the same.

Conventionally, polyester-based 1112. Km is widely used as a material for general clothing due to its excellent functionality and texture, but it is seriously inferior in color development compared to natural fibers such as wool and silk, and semi-synthetic fibers such as rayon and acetate. It has some drawbacks. This is because polyester fibers are dyed with disperse dyes, which have a low molecular extinction coefficient and poor clarity among dyes.

In addition, polyester fibers have a high refractive index of around 17, and there is a large refractive index difference with air, which prevents incident light from entering the fibers.Furthermore, polyester fibers are manufactured using a melt-spinning method. This is caused by many factors, including the fact that its smooth surface promotes specular reflection at the interface between the fiber and air, making it even more difficult for incident light to penetrate.

Traditionally, the coloring properties of these polyester fibers.

In order to improve the depth of color, a method has been proposed in which the surface of dyed fibers is coated with a low refractive index compound to reduce light reflection on the fiber surface.

There are problems with its texture and durability.

- A method has also been proposed to improve gloss and color depth by roughening the fiber surface. for example,
There is a technique in which a polyester fiber fabric is subjected to an alkali weight reduction treatment to reduce the fineness to obtain a soft texture and at the same time improve color development, and a technique in which fine particles of inorganic powder such as silica are present in the polymer. However, even in this method, since unevenness is formed on the fiber surface, color development is improved.

At the same time, the gloss decreased, and it was very difficult to obtain a product that was both glossy and had excellent color development.

Another technique is published in Japanese Patent Publication No. 51-23619.

Japanese Patent Publication No. 56-8140 has been proposed.

This method does not relax the threads, so it is not a satisfactory method for improving color development.

The inventors of the present invention have arrived at the present invention as a result of extensive studies aimed at improving these conventional drawbacks. That is, the present invention.

(1) In polyester yarn whose main component is ethylene terephthalate.

Yarn specific gravity ρ is less than 1.390 (g, n3) - Birefringence △
n is 15D to 170 (xlD') diving contraction rate S is 75
A polyester filament yarn with excellent color development, characterized by a black color development value of 15% or less.

(2) Polyester filament drawn yarn containing ethylene terephthalate 1- as a main component with a relaxation rate of 10 to
After passing through a heater at a heater temperature of 180 to 245°C at a heating temperature of 50%, a heat tensioning treatment is performed so that the total relaxation rate is 5 to 60% in the temperature range from the glass transition point to the softening point. A method for producing polyester filament yarn with excellent color development.

It is.

First, the first aspect of the present invention will be explained.

In the present invention, the specific gravity ρ of the polyester thread is 1,390
It is necessary that it is above. When the specific gravity is 1.390 or more, the crystals of the polymer molecules can sufficiently satisfy the color development and properties. The yarn specific gravity can be determined, for example, by inserting a short cut yarn into a n-hebutane-carbon tetrachloride mixed solution at 20°C and measuring the specific gravity of the solution at the point where the yarn stops in the solution. be able to.

If the specific gravity ρ of the polyester yarn is less than 1.390, the above object cannot be achieved.

Next, the yarn has a birefringence Δn of 15 D to 170 (x
ID'). When the birefringence Δn is within this range, the orientation of the nine molecules is disturbed and high dye adsorption properties can be sufficiently maintained. Birefringence △n is 150X1
If it is less than 0', the dyeing property is improved, but the level dyeing property is decreased, which is not preferable. Further, if the birefringence Δn exceeds 170×10 −3 , the dyeability will not be satisfied, which is not preferable.

Such birefringence can be measured by polarization microscopy or transmission interference microscopy.

Next, in the present invention, it is necessary that the diving shrinkage rate S is 7.5% or more. When the submersion shrinkage rate is within this range, there are advantages such as the width of adjustment being widened during the finishing process of the fabric because one width addition is large, the wrinkles of the fabric can be reduced, and the fabric can be made with high density. be. Further, when the submersion shrinkage rate is high, the dye adsorption rate becomes high, and the dyeing properties are improved. If the diving shrinkage rate is 75% or less, the above objective cannot be achieved.

This diving contraction rate I'1 is measured by JIS, L-1074.

Next, in the polyester yarn of the present invention, the L value of the black dyed yarn is 15.
% or less. When the L value is 15% or less, an excellent level of black coloring property not found in conventional yarns can be obtained, and by achieving this, the coloring property of other chromatic colors can also be improved for the same reason as above. You can get something very good. If the L value exceeds 15%, the above objectives are not fully achieved. Note that the L value is defined as a value calculated by 9th order processing and measurement method.

75 denier filament yarn was used to make a 28 gauge tubular knitted fabric, which was scoured in hot water at 98°C to remove process oils, and then set to form a fixed shape by drying at 180°C. After, Diε+n1xBlack BG-
Dye the fabric in a dye bath containing FS 15% Owf at a bath ratio of 1:60 for 60 minutes at 0℃, reduce washing, wash with water, dry, and then fix the form of the fabric at a temperature of 180C to obtain a black dyed product. . The L value of this dyed material is measured using a colorimeter (for example, a ska tester).
al11 is determined using a digital colorimeter (manufactured by Co., Ltd.). Here, the L value represents the visual density of a color, and the smaller the L value is, the more the color is erroneous.

Note that polyester containing ethylene terephthalate as a main component mainly refers to polyethylene terephthalate, but with less than 10 mol%.

-) Ethyl L/,/y recall, polyoxymethylene glycol with a polymerization degree of 2 or more, difunctional glycols such as 1,4 butanediol, 5-su) l) Ramsulfoisophthalic acid, inphthalic acid, bisphenol A, .

It may contain known copolymerizable components such as dibasic compounds such as dipic acid and their rust conductors, and polyfunctional compounds such as trimellitic acid, trimesic acid, glycerin, and pentanerythritol.

Further, in the present invention, silicon oxide is contained in the polymer.

It may contain known fine particles such as silica, alumina, calcium carbonate, barium sulfate, and titanium oxide.

The yarn of the present invention has a melt spinning speed of 2, for example, i, ooo to 8.
000 m10, and the yarn is stretched and/or
Or it can be obtained by heat treatment and relaxation and tension treatment. The heating relaxation and heating tensioning treatments may be repeated multiple times. It is preferable to perform the above heat treatment all at once in the spinning process, but the same effect can be obtained even if the process is performed separately in a subsequent process using a normal stretching machine or temporary twisting machine.

Next, the second invention of the present invention will be explained. First, before heating and tensioning the polyester filament yarn, it is necessary to give it a sufficient relaxing heat treatment. Such relaxing heat treatment causes molecular orientation disorder in the polyester filament yarn, increasing the amount and rate of dye exhaustion.

For this reason, it is necessary to significantly increase the relaxation rate.
The relaxation rate range is 10-50%, the temperature is 18
Must be between 0 and 245°C. Relaxation rate is 10
If the amount is less than %, highly dyed yarn cannot be obtained. In addition, if it exceeds 50%, the physical properties of the polyester itself will be impaired, which is undesirable, and if the temperature is less than 180°C, the relaxation rate will be 1.
Unable to get more than D%.

If the temperature exceeds JK 245°C, the yarn will deteriorate, which is not preferable.

Next, in the method of the present invention, the relaxing heat treatment system is subjected to heat tension treatment. This makes it possible to restore the polyester yarn, which has low strength and high elongation in the 2 strength elongation curve due to disordered molecular orientation, to physical property values within a usable range. Alternatively, the yield strength, Young's modulus, shrinkage rate, and gloss can be restored from degraded values to usable ranges. Furthermore, it is also possible to create a yarn that does not generate fuzz or the like. The degree of heating tension needs to be 5 to 30% in terms of total relaxation rate. More preferably, it is 10 to 15%, and the total relaxation rate refers to the relaxation rate compared to the starting yarn. If the total relaxation rate is less than 5%, it is impossible to obtain eye-level dyeing properties, and if the total relaxation rate exceeds 3°%, deterioration progresses too much and the yarn cannot be used. The preferred treatment temperature during heating tension is 100 to 200°C, and the preferred heating time is within a range of half or more of the relaxing heat treatment time.

Next, explanation will be given according to the drawings.

FIG. 1 shows an example of an embodiment of the present invention.

A drawn polyester filament yarn 1 is supplied to a yarn feeding roller 2, and is sufficiently relaxed between it and a heating roller 4, and then heat-treated by a heater 6. Thereafter, it is heated and tensioned between a heating roller 4 and a tensioning roller 5, and then wound onto a winding burner 6.

The polyester filament drawn yarn 1 may have a round or deformed cross-sectional shape, but is preferably polygonal or multilobal, ranging from triangular to octagonal. This is because C, which makes the yarn surface glittery, can be easily created. Further, the drawn yarn 1 may have any shrinkage rate, but is preferably a high shrinkage type. This is because the effects of the present invention can be emphasized.

Next, the effects of the present invention will be explained.

The cross-sectional deformation of the resulting yarn is hardly noticeable. In other words, there are not many changes in appearance. This is because there is no suppressing effect due to migration of single fibers as in the case of a temporary twisting tongue.

The luster tends to be deeper than raw silk before treatment. Next, regarding the yarn properties obtained by the present invention, first of all, the dye absorption rate during dyeing is good, so it is not only possible to dye deeply, but also selective absorption occurs depending on the dye blending ratio, and it is possible to produce iridescent hues. Shino dyeing is also done at Kawazura. In a strong offshore curve, the yield point stress and Young's modulus improve, resulting in thread breakage and fluffing.

``In addition to having the effect of preventing sink marks, etc., it can increase the suppleness or elasticity of the texture, resulting in drape properties.The tension treatment rate is considerably high, so the diving shrinkage rate is improved. Of course, the dry heat shrinkage rate also increases.This makes it easier to add and adjust the width during the dyeing and finishing process, making it possible to freely adjust the texture as well as improving quality such as smoothing out wrinkles.

The light when made from cloth? Although R is mild, it has a deep, deep color and gives it the impression of a luxury product.

Next, Example 1 will be described in detail with reference to Examples: Polyester filament yarn 75D-36fi with a triangular cross section taken and drawn at a spinning speed of 2200 no/G.
1 was treated using the method shown in FIG. 1 under the conditions shown in Table 1. The results are shown in Table 1. Each of the ...l] in the table was determined in the same manner as described above.

As is clear from the results in Table 1, it was found that the yarn and method of the present invention had excellent color development. All of the knitted fabrics made from the yarns obtained within the scope of the present invention had good firmness, stiffness, and excellent drapability. Others: Deep coloring and luster, giving a luxurious feel.
.

[Brief explanation of the drawing]

FIG. 1 illustrates the manufacturing method of the present invention. 1: Polyester filament drawn yarn 2: Yarn supply feed roller 3: Heater 4: Heating roller 5: Tension roller 6: Winding burn patent applicant Toshi Co., Ltd. Se, 10th Special R [Director General Kazuo Wakasugi 1, Indication of the case 1982 Patent Application No. 193382 2, Title of the invention R Polyester filament yarn with excellent color properties and method for manufacturing the same 3, Amendments made Personnel A'1 What is the relationship between patent applications and personnel?
2-2-5 Nihonbashi Muromachi, Chuo-ku, Tokyo Number of inventions to be increased by amendment None 6 Specifications subject to amendment Yamanaka 1 Detailed explanation of the invention column 7 Contents of amendment (1) Page 10 of Specification 111 In the 12th line, "Roll up." is changed to "Roll up. Tension again]" - Set up an indentation roller between Ra 5 and winding pirn 6 ( ) ℃, apply a mark to the yarn 4 C Good too. ” he corrected. 4i'? %,.

Claims (2)

[Claims] (1) In polyester yarn whose main component is ethylene terephthalate. Yarn specific gravity ρ is 1.390 (87 valence 3) or more Birefringence △n
Is 150~17 D (><I O-')? A polyester filament yarn with excellent coloring properties, characterized by a Jli water shrinkage rate S of Z5% or more and a black coloring property value of 15% or less. (2) Polyester filament drawn yarn containing ethylene terephthalate as a main component has a relaxation rate of 10 to 5.
After passing through a heater at a heater temperature of 180 to 245° C. at 0%, heating tension treatment m1 is performed so that the total relaxation rate is 5 to 60% in the temperature range from the glass transition point to the softening point. 'EyN method of polyester filament yarn with excellent color development.