JP3125879B2 - Polyester fiber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester fiber which has a good sliding property and a remarkably excellent grip property. More specifically, the present invention relates to a polyester fiber which has a good slipperiness and is excellent in easy-to-slip texture and has extremely good washing durability.

[0002]

2. Description of the Related Art Various methods have heretofore been proposed for imparting smoothness to crimped polyester fibers and improving the feeling of products after fiber opening. For example, if the static friction coefficient of the fiber is 0.2
A fiber having a denier of 5 or less and a friction band voltage of 1500 V or less (Japanese Patent Laid-Open No. 50-101689), a fiber having a fineness of 2 denier or less and a friction coefficient of 0.25 or less and a fineness of 4 to 13 denier friction coefficient of 0.28 A method of blending the above fibers (Japanese Patent Laid-Open No. 57-1384) is known, but it is not possible to sufficiently maintain a smooth texture for repeated washing. In addition, epoxy siloxane and amino siloxane, epoxy siloxane and amino compound,
A method of treating synthetic fibers with a combination of an aminosiloxane and an epoxy compound, a method of treating a synthetic fiber with a combination of an epoxysiloxane and an aminoalkoxysilane (see JP-B-48-17514),
No. 15) A treatment method using a combination of dimethylpolysiloxane and aminoalkoxysilane (Japanese Patent Publication No. Sho 5)
JP-A-1-37996), a method of treating with a combination of an amino group-containing organosiloxane and an epoxy group-containing organosiloxane (see JP-A-1-221580), a method of treating an amino group-containing organosiloxane and an epoxy group-containing organosiloxane. Known are methods based on a combination with an epoxy compound (see Japanese Patent Application Laid-Open No. 62-276090), and those treated with these compounds give a good texture to the product after the opening process at the initial stage. There is no effect due to a phenomenon presumed to chemically or physically bond between the polyester fiber surface and the formed silicon-based polymer film, only forming the silicon-based polymer film on the fiber surface, After repeated washing, the smoothness of the raw cotton and the fiber-fiber friction value increase, and the fiber-fiber entanglement (fel Reduction) proceeds, texture in the product after washing before and repetitive washing can not be obtained sufficient wash resistance would be bulky characteristics change significantly. In the method using an amino group-containing organosiloxane and a silane (Japanese Patent Publication No. 3-14946), although a certain degree of washing durability is obtained, the initial easy-hand feeling is not good, and an aminoalkoxysilane and an amino-modified silicone are not used. In the method disclosed by using methoxysilane and terminal-modified dimethoxysilane (Japanese Patent Application Laid-Open No. 58-214585), the weight percentage of aminoalkoxysilane in the whole fiber treatment solution is 25% or less, and three kinds of components are used. Is formulated in a single bath, so a cross-linking component is used to form the silicon-based polymer film rather than the bond between the polyester fiber surface and the silicon-based polymer film. I can't do that. Also, a method of mixing processed cotton and non-silicone processed cotton in a fixed ratio (Japanese Patent Laid-Open No. 51-78474) and a method of mixing silicon cotton and conductive fibers (Japanese Patent Laid-Open No. 50-86)
No. 66), the easy-slip texture and the washing resistance are not preferable because materials other than low-friction fibers are mixed.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks of the prior art, has excellent lubricity, has little change in lubricity even after washing, and has the same characteristics as before and after washing of the product after opening. It is an object of the present invention to provide a polyester fiber with less felting.

[0004]

Means for solving the above-mentioned problem, ie, the present invention provides a method for reducing the number of crimps of not more than 20 ridges / inch,
A crimped polyester short fiber having a degree of crimp of 25% or less,
The fiber / fiber static friction coefficient (μs ₀ ) is 0.18 or less, the fiber specific resistance value (logΩ) is 10.9 or less, and the fiber / fiber static friction coefficient (μ) after 10 times of model washing.
s ₁₀ ) is less than or equal to 0.22 and before and after model washing.
Polyester fiber characterized in that the rate of increase (μs ₁₀ / μs ₀ ) of the coefficient of static friction between fibers / fibers after performing model washing 0 times is 2.0 or less.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The cotton-filling fiber of the present invention is a polyester. The use of a polyester in the composition is cleaner and more cotton-filled products using natural fibers such as feathers, wool and cotton. According to the present invention, washing can be repeatedly performed, so that cleanliness can be maintained. Examples of the polyester fiber include, for example, polyethylene terephthalate, polyethylene terephthalate / isophthalate, polybutylene terephthalate, polybutylene terephthalate / ethylene terephthalate, and the like. May be a fiber made of a blend of two or more polymers as well as a homopolymer as long as it has a high polymer difference. The cross section of the fiber may be any of a circle, an irregular shape, and a hollow shape, and may be a modified fiber or a composite fiber having improved antistatic properties and flame retardancy.

The fiber for filling cotton of the present invention has an initial fiber-to-fiber static friction coefficient (μs ₀ ) of 0.18 or less and a fiber-to-fiber static friction coefficient (μs ₁₀ ) of 10 times after model washing 10 times.
Fiber-to-fiber static friction coefficient (μs ₁₀ ) of 22 or less and 10 times after model washing, and initial fiber-to-fiber static friction coefficient (μs ₁₀ )
₀ ) and the rate of increase represented by the ratio (μs ₁₀ / μs ₀ ) to 2.
0 or less, more preferably, μs ₀ is 0.13 or less, μs
_It is desirable that ₁₀ is 0.18 or less and μs ₁₀ / μs ₀ is 1.5 or less. Initial fiber-fiber static friction coefficient μs ₀ is 0.1
If the value is 8 or less, the feeling before washing is good as shown in the results of the examples, and if μs ₁₀ exceeds 0.22, the fiber-fiber friction value due to the compression deformation of the product during washing becomes high. At the time of recovery after compression deformation, the recovery of the fiber is inhibited and the felting is advanced, and μs ₁₀ / μs ₀ is 2.
If it exceeds 0, it becomes possible to determine the difference in the change in the easy-to-wear texture before and after washing by touch, and it will appear as a difference in the texture even when the side cotton is packed with raw cotton, which is not preferable.
The fiber-to-fiber static friction coefficient (μs) value represented by the present invention was measured by the method shown in JIS L-1074-1977 / 6-12.

[0007] In order to reduce the friction of polyester fibers, a surface treatment is generally performed with silicon. In the present invention, in order to reduce a change in friction value especially after washing, the following method is used.

A) General formula X-Si- (R ² ) L wherein R ² is a methoxy group and X is a linear aminoalkyl group containing at least one amino group, preferably a general formula: M * represented by H ₂ N (NH) m * (CH ₂ ) n * is an integer of 0 or more;
n * is an integer of 3 or more, and L is represented by 3], 35 to 45 parts of aminomethoxysilane, B) a general formula

Embedded image [Wherein R ² , R ³ and R ⁴ are the same or different and have 1 carbon atom
To 20 monovalent hydrocarbon groups or hydrogen atoms, Y is an amino group-containing organic group, A ¹ is a hydroxyl group or 1 to 5 carbon atoms.
Valent hydrocarbon, m1 and n2 are integers of 1 or more],
25 to 35 parts of an organopolysiloxane having an amino group-containing organic group in one molecule, C) a general formula

Embedded image Wherein R ⁵ and R ⁶ are the same or different and have 1 to 2 carbon atoms.
0 is a monovalent hydrocarbon group or a hydrogen atom, A ² is a hydroxyl group or a monovalent hydrocarbon having 1 to 5 carbon atoms, and m 2 is an integer of 1 or more]. A liquid D) prepared by dispersing 55 to 65 parts of an organopolysiloxane having no compound and the above compounds A), B) and C) in a mixed water dispersion is prepared.

After the compound A) is provided with an aqueous solution in which the compound A) is dispersed in the polyester fiber in an amount of 0.05 to 0.2% based on the weight of the fiber, the compounds A), B) and C) are mixed and dispersed in water. The liquid D) is applied with 0.1 to 2.0% by weight of an oil component to the polyester fiber, and the moisture content of the fiber before the curing treatment including the fiber treatment agent is set to 1% or more and 10% or less, and the curing treatment is started. Within 5 minutes after the fiber temperature 165 ℃ ~ 175 ℃
Then, heat curing is performed at 160 ° C. to 175 ° C. for 5 to 10 minutes.

The aqueous solutions A) and D) are applied to the polyester fiber by a conventionally known method such as an oiling roller method, a spray method, and an immersion method, based on the fiber weight. , May be applied to the undrawn yarn or may be applied to the drawn fiber,
It is preferable to give it to an undrawn yarn in order to further improve the washing resistance. Subsequently, the aqueous dispersion D) is applied to the fibers in a total amount of 0.1 to 2% by weight, preferably 0.4 to 2%. If the amount is too small, it is difficult to achieve the object of the present invention.

The heat treatment has the effect of reacting and curing the silicon treatment liquid and strengthening the adhesion to the fiber. The difference in the curing conditions causes the initial friction value of the polyester fiber after curing treatment and the change in the friction value after washing. Affect. Fiber moisture content before curing treatment including fiber treatment agent is 5% or more 1
2% or less, and the fiber temperature should be 1
The temperature was raised to 65 ° C to 175 ° C, followed by 165 for 5 to 10 minutes.
A thermosetting treatment is performed at a temperature of from ℃ to 175 ℃. When the moisture content of the fiber before the curing treatment is 5% or less, if the temperature rise of the fiber takes 5 minutes or more, the initial friction value does not sufficiently decrease, and
If the moisture content of the fiber before the curing treatment is 12% or more, the temperature rise of the fiber becomes slow, and the portion where the friction value of the fiber decreases after the curing treatment is not preferable.

The fiber for filling the fiber of the present invention has a mechanically crimped form, and has a degree of crimp (Ci) of 8% or more, more preferably 10% or more.
% / 25% or less, and the number of crimps (CN) should be 10 / inch or more, more preferably 10 / inch to 20 / inch. Crimping degree is 8% or less,
When the number of creases is 10 / inch or less, uniform opening is not performed during the opening process, and unevenness occurs in the opening web. Crimping degree is 2
If it exceeds 5%, or if the number of crimps exceeds 20 pieces / inch, the texture of the product after opening the card will deteriorate.
In addition, since the fiber having a low μs in the initial stage as in the present invention has a low fiber-fiber friction of the opened web, the web is potentially easily broken, the degree of crimp is 8% or less, and the number of crimps is 10 / inch or less. Then, handling of the web becomes difficult.

The crimped fiber of the present invention must have a specific resistance (log Ω) of 10.9 or less, preferably 9 or less, as shown in the examples.

The fineness (d) of the polyester fiber of the fiber of the present invention
en) is preferably 0.5 to 5 denier as shown in the examples.

The cut length of the fiber for filling the fiber of the present invention is not particularly limited, but it is preferably 40 mm to 120 mm, which allows ordinary card opening and easy binding.

The crimped form of the fiber of the present invention is preferably a mechanical crimp. In order to impart a mechanical crimping form, it is not preferable to use an asymmetric cooling method or a composite spinning method as a spinning method to impart a potential crimpability. In particular, the composite spinning method is not preferable because a three-dimensional crimp is easily generated during the high-temperature curing treatment of the silicon treatment liquid. It is desirable that the birefringence difference (δ △ n) between the cooling side and the non-cooling side after uniform cooling is 0.005 or less.

The undrawn yarn thus obtained is subjected to drawing. For example, in the case of polyethylene terephthalate, the drawing is carried out at a multistage high temperature and high draw ratio. The first stage has a tow temperature of 70 ° C. or higher and 100 ° C. or lower and a breaking elongation ratio (MDR) of 0.70 to 0.70 ° C.
Perform at 0.75 times. The second stage is performed at a temperature of 120 ° C. or more and 180 ° C. or less and 0.80 to 0.85 times the MDR. If necessary in order to adjust the physical properties to the intended use, the third-stage stretching is performed at a temperature within 5 ° C. to 20 ° C. from the crystal melting temperature at 0.9 to 0.95 times the MDR.

The polyester crimped fiber thus produced has an excellent slipperiness and shows a good slipperiness even after washing.
It becomes a polyester fiber that is less likely to be felt even after repeated washing. Since it has excellent washing resistance, it is used for filling cotton such as futons, winter clothing, furniture, and interiors.

[0019]

EXAMPLES Specific examples will be described below with reference to examples. The parts and percentages in the examples are on a weight basis.

(1) Fiber-to-fiber static friction coefficient The coefficient of static friction (μs) is represented by the method described in JIS L-1074-1977 / 6-12.

(2) Model washing test 1) Side ground 25 cm x 25 cm (No. 40 / No. 40: T120 /
L120 down (inches) downproof R (Toyobo product) 0.04 g / cm ² open cotton body is used as a sample.

2) Washing method is JIS L-1096, 6.
The evaluation was carried out according to the method shown in Method A of No. 23 and the number of washings was 10 times.

3) Evaluation methods are texture judgment based on tactile sensation and J
It shows the static friction coefficient (μs) according to the method described in 6.12 (1977) of IS L-1074 and the state of progress of felt by visual judgment. As the felting proceeds, fiber-fiber entanglement increases, and a favorable product such as a decrease in bulkiness and compression recovery cannot be obtained. The symbol x indicates that the process has progressed to a problematic level, and the symbol 場合 indicates that the process has not progressed.

(3) Measurement of specific resistance value 2 g of the sample fiber was put in a standard state (temperature: 20 ± 2) for 4 hours or more.
(° C., relative humidity 65 ± 2%), and the electric resistance (Ω) was measured 2 minutes after the fibers were placed on the sample table with the conductivity measuring instrument and the heavy metal electrode was placed thereon.

Examples 1 to 10 and Comparative Examples 1 to 11 Polyester resin pellets (RE-730, manufactured by Toyobo) having an intrinsic viscosity (IV) of 0.63 were melted at a spinning temperature of 270 ° C. The unstretched yarn 1 was discharged from the mold nozzle, wound up with a winding roller at a spinning speed of 1300 m / min, and had an elongation at break (MDR) of 2.77 times.
Next, the first stage stretching ratio = 2.08 times, the second stage stretching ratio =
It was stretched at a draw ratio of 1.07 times and a third-stage draw ratio of 1.13 times to obtain a drawn hollow polyester yarn 1 having a fiber density of 0.5 denier. Similarly, the discharge amount from the nozzle was adjusted, and the hollow polyester drawn yarn 2 having a fiber density of 0.7 denier, the hollow polyester drawn yarn 3 having a fiber density of 2.5 denier, the hollow polyester drawn yarn 4 having a fiber density of 5 denier 4, and the fiber density of 7 were used. A hollow polyester drawn yarn 5 having a denier of 0.5 was obtained.

Amino group-containing trimethylsilane represented by the formula (CH ₃ O) ₃ .Si (CH ₂ ) ₃ .NH (CH ₂ ) ₂ .NH ₂ (compound A)
And expressions

Embedded image An amino group-containing organosiloxane represented by the formula (compound B), wherein m1 = 100, n2 = 2 to 3,

Embedded image An organosiloxane (compound C) having no amino group-containing organic acid group (compound C) where m2 = 100 to 8000 was used, and the silicon treating agent was adjusted at the ratio of various oil agent formulations No. shown in Table 1. As comparative examples, commercially available epoxy silicone-based reactive silicone oil and unreactive silicone oil were used.

The unstretched yarn 1 was provided with 0.1% of the compound A based on the weight of the fiber, and then stretched to obtain a mixed dispersion D) of the compounds A, B, and C shown in Table 1 at 0% based on the weight of the fiber. .1
%, And subjected to mechanical crimping with a crimper. The tow having a moisture content of 8% before the curing treatment is heated to 170 ° C. in 5 minutes by a hot-air dryer, and subjected to a thermal curing treatment at 170 ° C. for 10 minutes. After spraying, the cationic antistatic agent (lauryl ammonium phosphate salt) is added to the fiber in an amount of 0.01 wt.
%, And cut into a fiber length of 64 mm using an Eastman cutter.

The drawn yarn 1 was provided with 0.1% of the compound A based on the fiber weight, and the mixed dispersion D) of the compounds A, B and C shown in Table 1 was provided at 0.1% based on the fiber weight. Mechanical crimping is performed by a crimper, and the tow having a moisture content of 8% before the curing treatment is heated to 170 ° C. in 5 minutes by a hot-air drier, heat-cured at 170 ° C. for 10 minutes, and sprayed after the curing treatment. In the above, a cationic antistatic agent (lauryl ammonium phosphate salt) was added in an amount of 0.01% based on the fiber weight, and cut to a fiber length of 64 mm with an Eastman cutter. Table 3
4 to 4 show the second embodiment. Similarly, curing treatment conditions using the drawn yarns 1 to 6 and the silicon treatment agent shown in Table 1 (heating rate, curing treatment temperature, moisture before curing treatment: conditions are described in Table 2)
Was changed as appropriate. The results are shown in Tables 3 and 4 as Examples 3 to 10 and Comparative Examples 1 to 11.

[0029]

[Table 1]

[Table 2]

[Table 3]

[Table 4]

According to the present invention, the lubricity is good,
It is possible to provide the most suitable polyester fiber for the stuffed cotton, which has an easy-to-smooth texture and extremely good washing durability.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-321155 (JP, A) JP-A-5-59673 (JP, A) JP-A-7-70938 (JP, A) JP-A-61- 70080 (JP, A) Tokiko Hei 1-26315 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06M 15/643-15/657

Claims (4)

(57) [Claims] 1. A crimped polyester short fiber having a number of crimps of 20 ridges / inch or less and a degree of crimp of 25% or less, a fiber / fiber static friction coefficient (μs ₀ ) of 0.18 or less, and a fiber ratio. The resistance value (logΩ) is 10.9 or less, and the coefficient of static friction between fibers (μs ₁₀ ) after performing model washing 10 times is 0.
22 or less, and the rate of increase of the fiber / fiber static friction coefficient (μ) before the model washing and after the model washing 10 times.
(s ₁₀ / μs ₀ ) is 2.0 or less. 2. The polyester fiber according to claim 1, wherein the fineness of the fiber is 0.5 to 5 denier. 3. The polyester fiber according to claim 1, wherein the surface of the fiber is covered with a silicone polymer film, and the fiber and a part of the silicone polymer film are bonded by a chemical bond via an amino group. 4. The polyester fiber according to claim 1, wherein the fiber is hollow.