JP3244173B2 - Suede-like fabric and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a polyolefin electrode.
The present invention relates to a suede-like fabric using elongated fibers and a method for producing the same.

[0002]

[0003]

[0004]

2. Description of the Related Art Conventionally, a suede-like fabric in which at least the surface layer is composed of ultrafine fibers is known. After forming a fabric with a sea-island structure fiber using a polyolefin and another soluble polymer, the fabric is dissolved. Japanese Patent Application Laid-Open No. Sho 54-12 / 1989 discloses a method of dissolving and removing a conductive polymer fiber and further performing a raising treatment.
No. 5789, and a method is also known in which after forming a fabric with a peelable conjugate fiber using a polyolefin and an incompatible polyester, splitting is performed on each polymer fiber by an external force such as a raising treatment. Not only is the manufacturing process complicated, but it is not only necessary to recover the solvent,
Regardless of the amount, heterogeneous fibers remain.

[0005] In addition, when a suede-like fabric composed of ultrafine fibers of polyester or polyamide is printed before or after the raising process in the manufacturing process, the root portion of the raised fibers is not colored in a dark color, and is generally used. A suede-like fabric composed of ultrafine fibers has a problem that a deep colored suede-like fabric cannot be obtained.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a polyolefin which is a resin which does not generate any harmful substances even when incinerated.
It was made as a result of a study to obtain a suede-like fabric from the used ultrafine long fibers . An object of the present invention is to provide a polyolefin
And a single fiber fineness of 1.1 dtex or less.
Suede-like fabrics made of ultra-fine polyolefin fibers
And to provide these suede-like fabrics in a simplified process.

[0007]

SUMMARY OF THE INVENTION The present invention provides a melt flow
Polyolefin with a rate value of 50 to 300 g / 10 min
The single fiber fineness is 1.1 dtex or less, the fiber strength is
Extra-fine polyolefin having 2.6 cN / dtex or more
The fabric is composed of fibers, and the surface of the fabric is
Has derived bent fibers and fluff of 30 fibers / mm ² or more
Suede-like fabric and a melt flow rate value of 50
Made of polyolefin up to 300g / 10min, monofilament
Fineness is 1.1dtex or less, fiber strength is 2.6cN / d
tex or more polyolefin extra fine filament
After forming the fabric, the fabric is subjected to a needle cloth raising treatment, and the fabric surface is bent.
Forming curved fibers and fluff of 30 fibers / mm ² or more
A method for producing a suede-like fabric .

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The polyolefin in the polyolefin ultrafine long fiber of the present invention includes polyethylene, polypropylene and the like, and is not particularly limited. High polypropylene is mentioned as preferred. The polypropylene preferably used may be a homopolymer of propylene or a meltable copolymer of propylene and another α-olefin monomer, for example, a monomer such as ethylene or bitene-1.

In particular , the polyolefin ultrafine filament according to the present invention has a melt flow rate (hereinafter abbreviated as MFR) value of 50.
To 300 g / 10 min, preferably 100 to 240 g / 1
Consists of 0 minute polyolefin. MFR value is J
Based on IS K-7210, it is a measured value under the measurement conditions of a test temperature of 230 ° C. and a test load of 2.16 kg. MFR
If the value is less than 50 g / 10 minutes, it is difficult to make uniform ultrafine fibers at the time of fiber production, thereby deteriorating the spinnability. Also, it is difficult to perform high-magnification stretching, and it is difficult to obtain long fibers having a single-fiber fineness of 1.1 dtex or less. When it exceeds 300 g / 10 minutes, the high fluidity of the polymer during fiber production deteriorates the spinning properties and makes it difficult to secure the fiber strength.

In the polyolefin ultrafine filament according to the present invention, the polyolefin constituting the ultrafine filament has an MFR value of 50 to 300 g / 10 min, preferably 100 to 240 g / min.
g / 10 minutes, it is preferably a polyolefin containing 0.01 to 6% by weight, preferably 0.5 to 4% by weight of a pigment, and the polyolefin ultrafine fibers are composed of a polyolefin containing a pigment. It is a spun fiber which is a very long and thin fiber but has high coloring properties. When the pigment content is less than 0.01% by weight, the color developability is insufficient,
If the content is more than 10% by weight, the spinnability during fiber production deteriorates, and it is difficult to draw at a high draw ratio, and it is difficult to obtain a long fiber having a single fiber fineness of 1.1 dtex or less.

The polyolefin ultrafine long fiber of the present invention has a single fiber fineness of 1.1 dtex or less and 2.6 c
It has a fiber strength of N / dtex or more, and is useful as a fabric material such as a woven fabric, a knitted fabric, and a nonwoven fabric. If the fiber strength is less than 2.6 cN / dtex, it is limited in use and is easily cut. Phenomena such as thread breakage, fluff dropping, etc. Further, the polyolefin ultrafine long fiber of the present invention,
The cross-sectional shape may be any shape such as a circular cross section, a hollow cross section, and a triangular cross section. In addition, the polyolefin constituting the polyolefin ultrafine long fiber of the present invention has 2.6 cN /
As long as the fiber strength is not less than dtex, an antioxidant, a heat stabilizer, a light stabilizer, an ultraviolet absorber, a fluorescent brightener,
Additives such as matting agents, antistatic agents, flame retardants, and antibacterial agents may be included.

In the production of the ultrafine filamentous polyolefin fiber of the present invention, a polyolefin, preferably polypropylene, having an MFR value of 50 to 300 g / 10 min.
Melt spinning is performed at 240 ° C. using a spinneret having a spinning hole diameter of 1.2 mm or less, and then a draw ratio is 2 to 7 times, preferably 2 to 5 times.
The stretching is performed by stretching at a temperature of 50 to 90 ° C. If the spinning head temperature is less than 180 ° C., sufficient fluidity cannot be obtained in the molten polymer, and if it exceeds 240 ° C., the discharged spun fibers are insufficiently cooled and adhesion between single fibers is likely to occur. When the spinning hole diameter exceeds 1.2 mm, unevenness in the discharge amount is apt to occur, resulting in poor spinnability. The winding speed after the melt spinning is set to 400 to 3000 m / min.
If it is less than 0 m / min, it is necessary to set the ejection amount low,
When the discharge amount unevenness is likely to occur between the spinning holes, and it is not possible to perform the high-magnification stretching, it is difficult to make the ultra-fine size, and when it exceeds 3000 m / min,
It is not possible to stretch at a high magnification, and it is difficult to make it extremely thin.

In the production of the ultrafine filaments of the present invention, a polyolefin containing 0.01 to 6% by weight of a pigment and having an MFR value of 50 to 300 g / 10 minutes is used. The pigment may be added directly, but a pigment is added at a high concentration to a polyolefin having an MFR value of 50 to 300 g / 10 minutes to obtain a pigment-containing polyolefin called a master batch. 300 g / 10 min, and the MFR value difference from the master batch polyolefin is 150 g / 10 min or less, more preferably 120 g / min.
It may be added by a method of diluting with a pigment-free polyolefin of 10 minutes or less so as to have a predetermined pigment content.

In the drawing after spinning, if the draw ratio is less than 2 times, a fiber strength of 2.6 cN / dtex or more cannot be obtained, and the elongation becomes extremely high.
The spinnability deteriorates. If the stretching temperature is lower than 50 ° C., high-stretching cannot be performed and a fiber strength of 2.6 cN / dtex or more cannot be obtained, and the yarn production stability also deteriorates. If it exceeds 90 ° C., the yarn production stability deteriorates. After stretching, the temperature is 60 to 140
The heat setting is preferably performed at a temperature of 0 ° C., and the heat setting may be any of a hot plate method and a heat roller method. If the heat setting temperature is lower than 60 ° C., shrinkage remains, and dimensional stability of the product is lacking. If the heat setting temperature exceeds 140 ° C., the spinnability deteriorates.

The suede-like fabric of the present invention has a single fiber fineness of 1.1 dtex or less and 2.6 cN / dte.
It is obtained by using the polyolefin ultrafine long fiber of the present invention having a fiber strength of x or more as a fabric material, particularly a suede-like fabric material. That is, the suede-like fabric of the present invention is one in which a fabric is composed of the polyolefin ultrafine fibers or the original polyolefin ultrafine fibers, and further has a bent fiber and a fluff derived from a fabric surface fiber on the surface of the fabric. It is.

In the suede-like fabric of the present invention,
The surface of the fabric composed of the polyolefin ultrafine fibers obtained by the method or the original polyolefin ultrafine fibers has a bent fiber derived from the ultrafine fiber drawn from the surface layer of the fabric, and further has a bent portion of the bent fiber. 30 fibers / mm ² produced by cutting of ultrafine fibers directly
It has fluff. Fluff on the fabric surface is 30 / mm
^If it is less than ² , it is insufficient for a suede tone. The suede-like fabric of the present invention has a constituent fiber of 2.6.
Since it is a polyolefin ultrafine long fiber having a fiber strength of cN / dtex or more, it has a wear durability of a wear loss rate of 1% or less.

In particular, in the suede-like fabric of the present invention,
The fabric to be the base fabric is a woven fabric, and a fabric having a warp density of 20 pieces / inch or more and a weft density of 20 pieces / inch or more,
It is preferable from the viewpoint of uniform distribution of fluff on the surface of the fabric, and it is difficult to obtain a suede tone at a density lower than this. The suede-like fabric of the present invention exhibits a suede tone with a good touch due to fine fluff on the surface of the fabric, especially when the fabric is made of original, especially high-concentration original polyolefin ultrafine long fibers, It has a deep dark suede tone.

The suede-like fabric of the present invention is manufactured as follows. That is, a fabric, preferably a warp density of 20 strands / inch or more and a weft density of 20 strands / inch or more, was formed from the polyolefin ultrafine filaments or the original polyolefin ultrafine filaments obtained by the above method . Thereafter, the suede-like fabric of the present invention can be obtained by subjecting the fabric to a needle cloth raising treatment.

In the needle cloth raising treatment, the fibers of the surface layer of the cloth are scraped out to the surface of the cloth with the needles of the cloth, and then cut at the bent portions of the drawn fibers to generate a fluffy brush. The needle length, thickness, material, shape, number of needles, number of needle cloth rolls, number of revolutions, and the like are appropriately changed according to the structure, density, and the like of the cloth. In the needle cloth raising treatment in the production of the suede-like cloth of the present invention, the number of times of the needle cloth raising treatment varies from 1 to 30 times, depending on the cloth, the needle cloth, the needle cloth roll, etc., so that fluff is generated at 30 lines / mm ² or more. Degree.

[0020]

The present invention will be described below in more detail with reference to examples. The abrasion durability of the fabric was evaluated by the following method.

(Wear Durability) The cloth subjected to the needle cloth raising treatment is measured for the weight of the cloth before and after abrasion using a Martindale abrasion tester in accordance with JIS L1096, and the abrasion loss rate is calculated by the following equation. The wear durability was evaluated by the percentage. Wear loss rate (%) = [(T ₀ −T ₁ ) / T ₀ ] × 100 T ₀ : Weight of fabric before wear (g) T ₁ : Weight of fabric after wear (g) Number of wear: 1000 times Press load : 12.0 ± 0.3KPa

Example 1 The polymer used was MFR
Using a polypropylene having a value of 130 g / min and a melting point of 162 ° C, spinning is performed by a melt extruder from a spinneret having an extruder temperature of 200 ° C, a spinning head temperature of 195 ° C, and 144 circular spinning holes with a hole diameter of 0.8 mm. Then, it was wound at a take-up speed of 900 m / min. Next, the stretching ratio is 2.945 times, and the stretching temperature is 80.
At a heat setting temperature of 135 ° C., and 114.4 ° C.
dtex / 144 filament (single fiber fineness 0.79d
tex) was obtained. The obtained ultrafine long fiber yarn had good spinnability, and the physical properties of the yarn are shown in Table 1.

(Example 2) As the polymer used, MFR was used.
The spinning and drawing were performed under the same conditions as in Example 1 except that the value was 220 g / min, the melting point was 162 ° C., polypropylene was changed, the number of circular spinning holes was changed to 192, and the drawing ratio was changed to 3.05. / 192 filaments (single fiber fineness: 0.69 dtex) were obtained. The obtained ultrafine long fiber yarn had good spinnability, and the physical properties of the yarn are shown in Table 1.

Example 3 Polypropylene having a pigment (cyanine green) content of 20% by weight, an MFR value of 160 g / min and a melting point of 162 ° C. was used as a polymer.
The polymer was spun and stretched under the same conditions as in Example 1 except that a polymer diluted with a polypropylene having an FR value of 220 g / min and a melting point of 162 ° C. at a dilution ratio of 30 times was used, and was spun and stretched to 114.4.
dtex / 144 filament (single fiber fineness 0.79d
tex) was obtained. The obtained spun ultrafine long fiber yarn had good spinnability, a pigment content of 0.67% by weight, and the yarn physical properties are shown in Table 1.

Example 4 The polymer used was MFR
Using a polypropylene having a value of 50 g / min and a melting point of 162 ° C., spinning is performed by a melt extruder from a spinneret equipped with 72 circular spinning holes having an extruder temperature of 220 ° C., a spinning head temperature of 215 ° C., and a hole diameter of 0.8 mm. Then, it was wound at a take-up speed of 900 m / min. Next, the film is stretched under the conditions of a stretching ratio of 2.54, a stretching temperature of 80 ° C., and a heat setting temperature of 135 ° C., and 78.3 dtex.
An ultra-fine long fiber yarn of / 72 filaments (single fiber fineness: 0.98 dtex) was obtained. The obtained ultrafine long fiber yarn had good spinnability, and the physical properties of the yarn are shown in Table 1.

Comparative Example 1 The polymer used was MFR
Using a polypropylene having a value of 30 g / min and a melting point of 162 ° C, a melt extruder is used to spin from a spinneret equipped with 72 circular spinning holes having an extruder temperature of 230 ° C, a spinning head temperature of 220 ° C, and a hole diameter of 0.8 mm. Then, it was wound at a take-up speed of 900 m / min. Next, the film was stretched under the conditions of a stretching ratio of 2.32 times, a stretching temperature of 80 ° C., and a heat setting temperature of 135 ° C., and 83.6 dtex.
A long fiber yarn of / 72 filament (single fiber fineness: 1.16 dtex) was obtained. Table 1 shows the physical properties of the obtained long fiber yarn.

(Comparative Example 2) The polymer used was MFR
Using a polypropylene having a value of 30 g / min and a melting point of 162 ° C., the extruder temperature was set to 220 ° C.
C., the second zone was 230.degree. C., the third zone was 250.degree. C., and the spinning head temperature was 250.degree. C., but the spinning was attempted under the same conditions as in Comparative Example 1. Did not.

[0028]

[Table 1]

(Example 5) 114. Obtained in Example 3
4dtex / 144 filament (single fiber fineness 0.79
dtex), two original filamentous fine filament yarns are aligned and the number of twists is 5
Twisted to 0 T / M. Use this twisted yarn for warp and weft,
It was woven into a plain fabric having a warp density of 26 lines / inch and a weft density of 60 lines / inch. The woven fabric was passed through a needle cloth raising machine (manufactured by Nankai Iron Works Co., Ltd.) to perform a needle cloth raising treatment with a brushing frequency of 20 times. Obtained original ChakuOkoshi woolen has 116 present / mm ² a very thin fluff on the surface, exhibits a suede appearance of the coloration, and dry feeling while having the texture of a flexible touch, abrasion loss ratio 0 .28%. In addition,
The woven fabric not subjected to the needle-brush raising treatment had no fluff on its surface, and lacked a suede-like appearance and a soft texture.

(Comparative Example 3) An original 113 dtex / 72 filament (single fiber fineness 1.57 dtex) obtained in the same manner as in Example 3 except that the polymer used in Example 5 was changed to polypropylene having an MFR value of 30 g / 10 min. A plain fabric was woven under the same conditions as in Example 5 except that the lengthwise fiber yarn was used, and a needle cloth raising treatment was performed. This woven fabric had poor passability in the needle cloth raising treatment, and the obtained brushed woven fabric had a fluff on the woven fabric surface of 12 / mm ² , and was not a suede-like fabric.

Example 6 Polypropylene having a pigment (cyanine green) content of 20% by weight, an MFR value of 103 g / min and a melting point of 162 ° C. was used as a polymer.
Circular spinning with an extruder temperature of 200 ° C., a spinning head temperature of 195 ° C., and a hole diameter of 0.8 mm, using a polymer extruded at a melt extruder with a FR value of 200 g / min and a polymer diluted by a factor of 6 with polypropylene having a melting point of 162 ° C. The fiber was spun from a spinneret having 144 holes and wound up at a take-up speed of 900 m / min. Next, the film is stretched under the conditions of a stretch ratio of 3.20 times, a stretching temperature of 80 ° C., and a heat setting temperature of 135 ° C., and 105.2 dtex / 144.
An original ultrafine long fiber yarn having a filament (single fiber fineness of 0.73 dtex) was obtained with good spinning stability. The obtained pigmented ultrafine long fiber yarn has a pigment content of 3.33% by weight, and the yarn physical properties are as follows: fiber strength: 4.18 cN / dtex, elongation: 28.5.
%Met.

[0032] Two of the original ultrafine filament yarns were drawn and twisted to a twist of 50 T / M. The twisted yarn was used as a warp and a weft, and woven into a plain fabric having a warp density of 26 yarns / inch and a weft density of 60 yarns / inch. The woven fabric was passed through a needle cloth raising machine (manufactured by Nankai Iron Works Co., Ltd.) to perform a needle cloth raising treatment with a brushing frequency of 20 times. The obtained brushed woven fabric has one extremely thin fluff on its surface.
It has 28 lines / mm ^2, has a deep dark suede appearance, has a soft touch, has a dry feeling, and has a wear durability of 0.31% in weight loss rate. Was. Further, in this example, even when the cyanine green of the pigment was replaced with polyazo yellow, polyazo red or cyanine blue, a deep and deep suede-like fabric was obtained.

[0033]

The suede-like fabric of the present invention is obtained simply from the fabric made of ultra-fine polyolefin fine fibers without any solvent treatment or splitting treatment, and has a fluffy suede-like appearance. It has a soft touch and good texture, and is excellent in wear durability. In particular, when the cloth is made of dark original polyolefin ultra-fine long fibers, the cloth is a deep dark suede-like cloth and has a high-class feel. Furthermore, the suede-like fabric of the present invention is:
By being composed of a polyolefin that does not generate harmful substances such as gas when incinerated during disposal, disposal is facilitated.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-11-279832 (JP, A) JP-A-11-140719 (JP, A) JP-B 1-60564 (JP, B2) (58) Field (Int.Cl. ⁷ , DB name) D03D 15/00 D06N 3/00 D01F 6/04-6/08

Claims (7)

(57) [Claims] A melt flow rate value of 50 to 300 g
/ 10 minutes of polyolefin with a single fiber fineness of 1.
1 dtex or less, fiber strength 2.6 cN / dtex or more
The fabric is composed of polyolefin ultra-fine long fibers,
Bent fibers derived from the surface fiber of the fabric on the surface of the fabric;
A suede-like fabric having a fluff of book / mm ² or more. 2. The wear reduction rate is 1% or less.
A suede-like fabric as described. 3. The polyolefin is polypropylene.
The suede-like fabric according to claim 1 or claim 2 . 4. The suede-like fabric according to claim 1, wherein the fabric is a woven fabric having a warp density of 20 strands / inch or more and a weft density of 20 strands / inch or more. 5. A melt flow rate value of 50 to 300 g.
/ 10 minutes of polyolefin with a single fiber fineness of 1.
1 dtex or less, fiber strength 2.6 cN / dtex or more
After forming the fabric in polyolefin microfine long fibers is to facilities the clothing raising treatment to the fabric, bending the fiber及the fabric surface
A method for producing a suede-like fabric, characterized by forming fluff of at least 30 fibers / mm ² . 6. The polyolefin is polypropylene.
A method for producing a suede-like fabric according to claim 5 . 7. The method for producing a suede-like fabric according to claim 5, wherein a woven fabric having a warp density of 20 strands / inch or more and a weft density of 20 strands / inch or more is formed.