JP2003064560A - Raised product and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a raised product having an excellent touch feeling by a method for producing the raised product comprising using acrylic staple fibers dyed with a cationic dye, carrying out a dry heat polisher step and processing the acrylic staple fibers into piles. SOLUTION: This raised product is obtained by using an acrylic polymer containing 0.5-5 wt.% of a sulfonate group-containing monomer as a raw material, wet spinning the polymer, then dyeing the resultant staple fibers with the cationic dye in a hot bath at <95 deg.C and regulating both the ratio of Young's modulus of the acrylic staple fibers to the Young's modulus of undyed acrylic staple fibers (RW staple fibers) and the ratio of boiling water shrinkage percentage of the acrylic staple fibers to the boiling water shrinkage percentage of the RW staple fibers within the range of 0.07-1.50, carrying out the dry heat polisher step and processing the acrylic staple fibers into the piles. The method for producing the raised product is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a napped product in which acrylic short fibers dyed at a specific dyeing temperature with a cationic dye are subjected to pile processing by dry heat polisher, and a method for producing the napped product.

[0002]

BACKGROUND OF THE INVENTION Acrylic short fibers, which are most suitable for interiors, clothing, toys and faux fats, are widely used as synthetic fibers which can be dyed easily and inexpensively with a cationic dye having excellent coloring and dyeing properties. The dyeing method includes a method in which a cationic dye is adsorbed in a boiling bath, and a so-called dyeing processing method in which a dye is adsorbed by being immersed in an aqueous cationic dye solution immediately after being extruded from a spinneret in a wet spinning method. There is a napped product that has been processed into a pile by using dry heat polisher process using sown cotton.

Naturally, the final goal of the texture suitable for interiors, clothing, toys and faux fats is a natural animal hair texture, with straight stretched cotton wool, a soft and moist texture and the product's bulkiness and luster. is there. However, this method of adsorbing the cationic dye to the acrylic short fibers in the boiling bath is more suitable for dyeing small lots of various types than the dyeing method, but the fibers shrink due to the heat load during boiling dyeing The texture of cotton hardens. Further, since the spinning texture oil agent falls off during dyeing, the texture deteriorates, and a satisfactory product texture cannot be obtained.

Natural animal hair has few crimps and is entangled, and unwinding is smooth. However, synthetic fibers have a uniform thickness,
There is a mechanical crimp for spinning, and if the crimp is not stretched, the fluffy cotton and the fluff will be entangled, making it impossible to unwind, the texture is rough and it is extremely bad, and sleep at the time of packing, etc. Problems such as poor property, folding wrinkles, and dust adhesion occur. To eliminate these problems and make it look more like natural animal hair, it is necessary to straighten the mechanical crimp of the fiber in a certain direction with a dry heat polisher.

The heat load during boiling dyeing causes fiber shrinkage, and the texture of dyed cotton is hardened. In order to straighten a mechanical crimp set by a heat load with a dry heat polisher, processing conditions of 170 to 180 ° C. or higher have been conventionally required. And, since the spinning texture oil drops off during dyeing, the antistatic effect of the acrylic short fibers deteriorates, cutting dust and flies adhere due to frequent occurrence of static electricity, finishing shirring is extremely difficult and the working environment naturally deteriorates There was a problem that the switching frequency such as machine stop, cleaning, temperature rising operation etc. for each piece of fabric increased.

[0006] On the other hand, in the primary coating method, while the fiber structure of the acrylic short fibers immediately after spinning the cationic dye is soft,
The dyeing speed is remarkably high because the dye is pushed into the fiber,
Despite the advantages for mass production, special equipment, processes,
It requires management and is not suitable for dyeing a large number of small lots.

As an example of dyeing at low temperature, Japanese Examined Patent Publication No. 49-38
Japanese Patent Publication No. 945 proposes a method of dissolving a halogenated aliphatic hydrocarbon compound, dissolving a cationic dye therein, and dyeing an acrylic synthetic fiber at a temperature of 80 ° C. or lower.
Large production stainability of cationic dye, bad influence of halogenated aliphatic hydrocarbon compound on drainage, frequent occurrence of static electricity in spinning process, deterioration of card passing property, frequent winding on various rollers, etc. Is difficult to get.

As an example of a method for producing animal hair-like acrylic synthetic fibers, JP-A-7-238423 discloses a method of wet spinning, stretching, washing with water, applying amino-modified silicone to gel-swelling acrylic synthetic fibers and drying. The method of doing is proposed. However, although the silicone oil can give slipperiness and flexibility, there is a problem in that static electricity is abnormally generated in the product, especially during processing, after processing, and during sewing. And the fiber shrinkage occurs due to the heat load at the time of dyeing a high temperature boiling cationic dye, the texture of the dyed cotton is hardened, and an appropriate dry heat polisher temperature for stretching the raw cotton crimp is required to be 170 to 180 ° C. or higher,
The fibers harden and the texture deteriorates, resulting in a dry-touch product texture that is far from the target product texture.

Further, the raw cotton to which the cationic softener and the silicone oil are attached has a strong water repellency, and when processing a high pile product, there is a problem in the adhesiveness of the backing agent due to poor permeability.

[0010]

SUMMARY OF THE INVENTION Therefore, the present invention is to solve the above-mentioned problems of the prior art and to obtain a napped product having an excellent texture.

[0011]

[Means for Solving the Problems] The above-described object is to use an acrylic polymer containing 0.5 to 5% by weight of a sulfonic acid group-containing monomer as a raw material, and after wet spinning, dye it with a cationic dye in a warm bath of less than 95 ° C. Dyeing in which Young's modulus of the acrylic short fibers is within the range of RW cotton's Young's modulus = 0.7 to 1.50 and boiling water shrinkage is within the range of RW cotton's boiling water shrinkage = 0.7 to 1.50 This is achieved by a napped product that uses cotton and is subjected to a dry heat polisher process to give the pile a good texture. Then, using an acrylic polymer containing 0.5 to 5% by weight of a sulfonic acid group-containing monomer as a raw material, and using acrylic short fibers dyed with a cationic dye in a warm bath of less than 95 ° C. after wet spinning, a dry heat polisher process By the manufacturing method, which is characterized by processing and processing into piles, the stabbed cotton grows straight, and a product with a soft and moist texture similar to natural animal hair and a feeling of bulkiness and waist makes it possible to solve problems. It was

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The acrylic short fibers used in the present invention contain 0.5 to 5% of a sulfonic acid group-containing monomer described later.
The raw material is an acrylic polymer containing 5.0% by weight. As used herein, the acrylic polymer is composed of 40% by weight or more of acrylonitrile as a component other than the sulfonic acid group-containing monomer and 60% by weight or less of another vinyl monomer. Specific examples of the vinyl-based monomer include acrylic acid, methacrylic acid, or their alkyl esters, vinyl acetate, vinyl chloride, vinylidene chloride and the like.

As the sulfonic acid group-containing monomer used in the present invention, sodium allylsulfonate, sodium methallylsulfonate, sodium vinylsulfonate, sodium styrenesulfonate, sodium 2-acrylamido-2-methylpropanesulfonate and the like are appropriately used. Examples include combinations.
Of these, sodium methallyl sulfonate and sodium 2-acrylamido-2-methylpropane sulfonate are preferable.

The above-mentioned sulfonic acid group-containing monomer is used for cation dyeing as anion seat on acrylic short fibers. The amount of the sulfonic acid group-containing monomer used in the present invention must be 0.5 to 5.0% by weight in the acrylic polymer. If the amount is less than 0.5% by weight, the flexibility of the fiber is lowered, and the cationic dye causes coloration of medium and dark colors and poor dyeing property, and if the amount is more than 5.0% by weight, the fiber is stuck and produced. There is a problem in operation.

Wet spinning may be carried out in the same manner as for ordinary acrylic synthetic fibers. After passing through several stages of baths, sequentially drawn, washed with water and dried, and cut, acrylic short fibers are obtained. The fiber cross-section may be round, flat, or any other type of cross-section, but flat and elliptical are preferred for obtaining a napped product with an excellent texture, and a flatness ratio of 3-11 for improving visual and texture. Is more preferable.

In the present invention, any known additives may be added to the fiber. For example, flame retardants, light stabilizers, ultraviolet absorbers, pigments, antistatic agents and the like can be mentioned as specific additives.

The brand of the cationic dye may be any conventionally known one and is not particularly limited. For example, the Basacryl series manufactured by BASF and the Diacr manufactured by Mitsubishi Chemical.
Examples include the yl series.

The concentration of the cationic dye is not particularly limited, but for example, 0.1 to 5.0% by weight based on the weight of fiber is preferably used. A dye accelerating dye is not particularly necessary, but a conventionally known dye accelerating dye may be used in accordance with a known technical example. Further, the dyeing bath ratio is not particularly limited.

The packing density of the acrylic short fibers at the time of dyeing is not particularly limited, but it is preferable that it does not cause uneven dyeing, and soaping after dyeing may be carried out under conventionally known conditions.
~ 70 ° C is preferred.

In the present invention, the dyeing temperature using the cationic dye needs to be dyed in a warm bath below 95 ° C., which is lower than the general dyeing temperature. When dyed at a temperature of 95 ° C or higher, fiber shrinkage occurs due to heat load, Young's modulus increases, the texture hardens, and high heat processing conditions are required to straighten the mechanical crimp set by heat load with a dry heat polisher. Therefore, the texture of the product is impaired. In order to obtain a napped product having an excellent texture after being subjected to a dry heat polisher process and processed into a pile, 80 to 90 ° C is more preferable. In general, dyeing of acrylic short fibers starts and increases rapidly at a dyeing temperature of around 80 ° C, and dyeing hardly occurs below 80 ° C.

The Young's modulus of the acrylic short fiber dyed cotton dyed with the cationic dye used in the present invention is within the range of Young's modulus of RW cotton = 0.7 to 1.50 and the boiling water shrinkage is the boiling water shrinkage of RW cotton. Rate = 0.7-1.50, Young's modulus = 0.8-1.30 and boiling water shrinkage = 0.8-1.20 are more preferable. . When Young's modulus is less than 0.7, waist and volume are insufficient, and 1.5
If it exceeds 0, the fibers are hardened, the crimp elongation is reduced, and the product feel is poor. When the boiling water shrinkage is less than 0.7, the crimp of acrylic short fibers is set at the time of dyeing with a cationic dye, so the product crimp after dry heat polisher treatment does not stretch,
The texture is bad. If it exceeds 1.50, the product will have a low waist and volume.

The dyeing time may be any conventionally known condition, but for example, it is preferably about 20 minutes to 70 minutes.

The spinning texture oil agent added to the acrylic short fibers after dyeing is not particularly limited, but an oil agent which does not cause a trouble such as static electricity generation in the next step is selected and used.

In the present invention, a napped product can be obtained by mixing a small amount of other fibers with acrylic short fibers.

In the dry heat polisher process, conventionally known equipment used for general acrylic short fibers may be used, but the process temperature condition is lower than 170 ° C., which is lower than the conventional condition, and 15
0 to 160 ° C. is preferable, and about 150 ° C. is more preferable in order to obtain a napped product with an excellent texture.

[0026]

EXAMPLES The present invention will be specifically described below with reference to examples. In the examples, “%” means “% by weight”.

Examples 1-3, Comparative Examples 1-2 Acrylonitrile (AN) / vinylidene chloride (VDC)
/ 2-acrylamido-2-methylpropanesulfonic acid soda (SAM) = (58-X) / 42 / X was added to the acrylic copolymer shown in Table 1 so that the polymer concentration was 27%. )) Was spin-dried through a 0.055 mmφ × 8,000 hole spinneret into a coagulation bath at 20 ° C. with DMF / water = 58/42%, washed with water, added with an oil agent, crimped after drying and cut to 8
Acrylic short fibers of dtex × 51 mm were obtained. And, this acrylic short fiber is made into Bascryl BLAC.
Add 2% or 5% of black dye of KX-BLN Lig,
Dyeing was carried out at 90 ° C. for 40 minutes using an Overmeier cotton dyeing machine.

To these dyed cotton, a spinning texture oil agent and an antistatic oil agent were added together in an amount of 1.0%, and a roller card was used.
A sliver of 14 g / m was prepared, knitted with a 14 G sliver knitting machine, and a sizing agent was applied to the back surface of the sliver knitting machine for the purpose of preventing hair loss and dried. After this, brush twice, and
Dry heat polisher was performed 6 times, and shirring was performed 2 times.
The pile length of this napped product was 23 mm and the basis weight was 6
It was 24 g / m ² .

The following Examples 1 to 3 and Comparative Examples 1 and 2 were evaluated by the following methods. The results are shown in Table 1.

Single yarn breakage / wrapping during production / operation A single yarn breakage or winding around the roller during production / operation was rejected (x). The degree of adhesion of the fiber was visually judged by 5 people, and the pass / fail was judged, and when 5 people did not have the adhesion of the fiber and it was judged that the separation property was good (pass)
Other than that, it was judged as a failure (x). The degree of achievement of hue was visually judged by 5 people, and the pass / fail was judged. When all 5 persons judged that the degree of achievement of hue was good, it was judged as pass (◯), and the others were judged as fail (x).

[0031]

[Table 1]

Examples 4 to 6 and Comparative Examples 3 to 5 AN / VDC / SAM + sodium methallyl sulfonate (S
(MAS) = 56/42/2, an acrylic copolymer was dissolved in dimethylformamide (DMF) so that the polymer concentration was 26%, and the spinning solution was 0.451 mm × 0.
038mm, 4,800 hole flat type D
MF / water = 58/42%, wet spinning in a coagulation bath at 20 ° C., washing with water, addition of an oil agent, crimping after drying, cutting 11
Acrylic short fibers of dtex × 51 mm were obtained. And, this acrylic short fiber is made into Bascryl BLAC.
Add 3% of KX-BLN Lig black dye and use an Overmeyer cotton dyeing machine at 90 ° C for 40 minutes and 100
Dyeing was carried out at 40 ° C. for 40 minutes, and Young's modulus and boiling water shrinkage of these dyed cottons were measured.

To these dyed cotton, a spinning texture oil agent and an antistatic oil agent were added together in an amount of 1.0%, and a roller card was used.
A sliver of 15 g / m was prepared, knitted with a sliver knitting machine of 14 G, and a sizing agent was applied to the back surface of the sliver knitting machine for the purpose of preventing hair loss and dried. After this, brush twice, and
First, dry-heat polisher at 150 ° C. was performed 6 times, and shearing was performed 2 times. The pile length of the obtained napped product is 2
The basis weight was 655 g / m ² at 5 mm.

Examples 4 to 6 Young's modulus and boiling water shrinkage of 90 ° C. × 40 minutes dyed cotton are 0.7 to 1.50 in comparison with RW cotton (before dyeing), and products after dry heat polisher treatment The crimp was stretched and the texture was a napped product with an excellent soft feeling.

Comparative Examples 3 to 5 Young's modulus and boiling water shrinkage of 100 ° C. × 40 minutes dyed cotton are RW.
In comparison with cotton (before dyeing), the Young's modulus and the boiling water shrinkage, or either of them were out of 0.7 to 1.50, and the overall evaluation was poor.

Next, the above Examples 4-6 and Comparative Examples 3-5.
The napped product obtained in 1. was evaluated for the crimp elongation state and the soft texture by the following methods, and the results are shown in Table 2.

Ratio of boiling water shrinkage ratio with RW cotton The boiling water shrinkage ratio was measured according to JIS L1015 7.15 (1) Hot water shrinkage ratio, and the ratio was calculated. * Ratio of boiling water shrinkage with RW cotton = boiling water shrinkage of dyed cotton / R
W water boiling water shrinkage rate Boiling water shrinkage rate (%) = L−L * / L × 100 L = distance between grips when an initial load before treatment is applied (m
m) L * = distance between grips when an initial load is applied after treatment (m
m)

Ratio of Young's modulus with RW cotton Young's modulus was calculated from the initial tensile resistance of 7.11 of JIS L1015, and the ratio with RW cotton was calculated and displayed. * Ratio of Young's modulus with RW cotton = Young's modulus of dyed cotton / Young's modulus of RW cotton

Crimping elongation was visually evaluated by 10 people, and the result was judged to be acceptable or unacceptable. When all 10 people judged that the crimp elongation was good, the result was judged as pass (◯), and the other cases were judged as failure (x).

A sensory evaluation was carried out by five people with a soft texture of the product, and a pass / fail judgment was made. A case where all five people were judged to have a good soft feeling was judged as pass (◯), and the other cases were judged as fail (x).

Further, as a comprehensive evaluation of the above items, those which passed in any of the evaluations are shown as pass (◯), and the others are shown as failure in Table 2.

[0042]

[Table 2]

Examples 7 to 12 and Comparative Examples 6 to 12 AN / methyl acrylate (MA) /SAM=89.9/
A spinning stock solution was prepared by dissolving an acrylic copolymer of 7.6 / 2.5 in DMF to a polymer concentration of 25%. 1. Titanium oxide in a DMF dispersion liquid was added to this spinning solution.
051% added, 0.451 mm x 0.038 mm,
DMF / water = 5 through 4,800 hole flat die
Wet spinning in a coagulation bath at 8/42%, 20 ° C., washing with water, addition of oil agent, crimping after drying, cutting and 17 dtex × 51
mm acrylic short fibers were obtained. And this acrylic short fiber is made into Bascryl BLACK X-BLN.
Add 2% of Lig's black dye and use Overmeyer cotton dyeing machine at 80 ℃ × 40min, 90 ℃ × 40min, 95 ℃
Dyeing was carried out for 40 minutes at 100 ° C. for 40 minutes. After adding about 1.0% of spinning texture oil agent and antistatic oil agent to these dyed cotton, make 13g / m sliver using roller card and knit with 8G sliver knitting machine to prevent hair loss. A sizing agent was applied to the back surface and dried. After that, brushing was performed twice, dry-heat polisher at the temperatures of the examples and comparative examples was performed 6 times, and shearing was performed twice. The pile length of the obtained napped product is 25 mm and the basis weight is 689.
It was g / m ² .

Examples 7-9 Using dyed cotton at 80 ° C for 40 minutes, 150 ° C, 160 ° C,
All products were subjected to dry heat polisher treatment at 170 ° C., but crimps were elongated, the texture was soft and moist, and the product was voluminous and bulky, and a napped product excellent in luster was obtained.

Examples 10 to 12 Using dyed cotton at 90 ° C for 40 minutes, 150 ° C, 160 ° C,
After the dry heat polisher treatment at 170 ° C., all products were crimped products with crimp extension, soft and moist texture, bulkiness, and excellent luster feeling.

Comparative Examples 7 to 9 Using dyed cotton at 95 ° C. for 40 minutes, dry heat polisher treatment was carried out in the same manner. Although the crimp of the product at 170 ° C was growing, it was a soft napped product with a soft texture. And 150 ℃, 160
With the dry heat polisher at ℃, the crimp did not extend and the texture was poor.

Comparative Examples 10 to 12 Using dyed cotton of 100 ° C. × 40 minutes, dry heat polisher treatment was carried out in the same manner. Although the crimp of the product at 170 ° C. expanded, the dry heat polisher temperature was high, so that the product had a hard texture and was an unsatisfactory napped product. And 150 ℃, 1
With the dry heat polisher at 60 ° C., the crimp did not extend and was poor.

Next, Examples 7 to 12 and Comparative Example 6 to
For the napped product obtained in No. 12, the softness, moistness, and bulkiness / looseness of crimp elongation and texture were evaluated by the following methods, and the results are shown in Table 3.

The crimp elongation state was visually judged by 10 persons, and a pass / fail judgment was made. When all 10 persons judged that the crimp elongation state was good, the result was judged as pass (◯), and the other cases were judged as unacceptable (x). .

A sensory evaluation was carried out by 5 people with a soft feeling, and a pass / fail judgment was made. A case where all 5 people were judged to have a good soft feeling was judged as pass (◯), and the other cases were judged as pass (x).

A sensory evaluation was carried out by 5 people with a moist feeling, and a pass / fail judgment was made. A case where all 5 people were judged to have a good moist feeling was judged to be acceptable (◯), and the others were judged to be unacceptable (×).

Looseness / Luminousness A sensory evaluation was conducted by 5 people, and a pass / fail judgment was made.
The case where the waist feeling was judged to be good was judged as pass (○), and the other cases were judged as fail (x).

Further, as a comprehensive evaluation of the above items, those which passed in any of the evaluations are shown as pass (◯), and the others are shown as failure in Table 3.

[0054]

[Table 3]

As can be seen from Table 1, the acrylic short fibers of Examples 1 to 3 gave the target hue after cotton dyeing, and the Young's modulus and boiling water shrinkage of the dyed cotton of Examples 4 to 6 in Table 2 were high. The product after dry heat polisher treatment using dyed cotton in the range of 0.7 to 1.50 of RW cotton (before dyeing) was a napped product with excellent crimp elongation and soft feeling. And as shown in Table 3, it was the most suitable as a product using the acrylic short fibers of Examples 7-12.

[0056]

According to the present invention, the crimp stretches well,
It is possible to provide a napped product that has a soft and moist feel, and is bulky, bulky, and has an excellent waist feel.

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3B154 AA09 AB21 BA25 BB59 BF18                       BF20 BF29 DA06 DA09 DA18                 4H057 AA01 BA03 DA01 DA33 FA17                       GA07 GA22 HA01 JA10 JB02                 4L002 AA08 AB01 AC02 BB04 DA02                       EA01 EA08 FA00                 4L035 BB03 BB15 DD19 EE09 EE20                       FF07 GG08 MB08

Claims (2)

[Claims] 1. A sulfonic acid group-containing monomer is used in an amount of 0.5-5.
Made from acrylic polymer containing 95% by weight
A napped product that has been processed into a pile by subjecting it to a dry heat polisher process using dyed cotton having a Young's modulus ratio and a boiling water shrinkage ratio of acrylic short fibers dyed with a cationic dye in a hot bath of less than. Young's modulus of dyed cotton / Young's modulus of RW cotton = 0.7 to 1.5
0 Boiling water shrinkage ratio of dyed cotton / RW water boiling water shrinkage ratio = 0.7 to
1.50 RW cotton: undyed short acrylic fiber 2. A sulfonic acid group-containing monomer is added in an amount of 0.5 to 5
The Young's modulus of the acrylic short fiber, which is obtained by dyeing with a cationic dye in a warm bath of less than 95 ° C. after wet-spinning, using an acrylic polymer as a raw material containing acrylic polymer by weight, has a Young's modulus of RW cotton = 0.7 to
Within the range of 1.50 and boiling water shrinkage is RW cotton boiling water shrinkage =
A method for producing a napped product, which uses a range of 0.7 to 1.50 and which is subjected to a dry heat polisher step to be processed into a pile.