JPS60194147A - Raised product and its production - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a napped product and a method for producing the same.

Napped products, especially those with long cut piles, have a fur-like appearance and are extremely useful. However, artificial fur-like products are still inferior to natural fur and remain in the low-grade range.

Natural high-quality fur has two types: thin, short fluff and thick, long prickly hair.
It consists of a heavy structure. In pyrotechnics, a considerable number of improvements are being made in the area of prickly bristles, but not much research has been done on fluff, and there are few suggestions for improvement. However, fluff is an insulator.

It is extremely important in terms of bulk, appearance, feel, etc., and excellent fluff is desired.

The purpose of the present invention is to improve heat insulation and bulkiness.

To provide a raised product having a high degree of fluff that is superior to natural products in terms of fluff, feel, appearance, etc., and a method for producing the same.

The present inventors have disclosed Patent No. 57-20 regarding the fluff of napped products.
In No. 3484, we proposed a cocoon-shaped cross section.

The inventors of the present invention continued to study the cross-sectional shape of fluff, and as a result, they discovered that the C-shaped cross-section has very excellent characteristics, and completed the present invention.

The raised product of the present invention has a C-shaped cross section with an oblateness ratio of 1.2 to 4.5 and a concavity ratio of 15 to 75%, and a fineness of 0.5 to 5.
,0 denier melt-spun fiber, length 5f
It is characterized by having crimped fluff with a crimp/stretch rate of 1 or more and a crimp/expansion ratio of 50% or less, and a nap density of 3,000 to 30,000 pieces/d. In addition, the method of the present invention has an aspect ratio of 1.2 to 4.5. <Dip ratio 15-75%, fineness 0.5
After producing a fiber structure with napped fibers using a composite fiber consisting of a segment with a C-shaped cross section of ~5.0 denier and a component having a higher dissolution or decomposition rate than the components of the segment, the dissolution or decomposition rate is It is characterized by dissolving or decomposing and removing components with a high decomposition rate, and making the cross section of the napped aNO C-shaped.

The length of the fluff with a C-shaped cross section (hereinafter referred to as C-shaped fluff) is 5"
or more is required, and those between 7 and 50 rm are often used, and those between 10 and 30 rm are most commonly used.

The fineness of C-shaped fluff is 0.5 to 5. It is necessary that Od. Thin fibers are preferable in terms of flexibility and bulk, but in reality, products made of very thin fibers tend to get entangled with each other during the manufacturing process or during wear, resulting in pilling or clumping together. , hair handling properties, flexibility, heat retention, and aesthetics are significantly inferior. From this point of view, the fineness of the fluff is particularly preferably from 0.8 to 3 d, most preferably from 1 to 2 d. It seems likely that the length and fineness of fluff are distributed moderately rather than uniformly, for example, the fluctuation rate, that is, [standard deviation/average] x 100 (%), is about 3 to 50%, especially 5 to 30%. % is preferred. When the length and fineness are distributed, the average value is used as the representative value.

FIG. 1 is an explanatory diagram showing a C-shaped cross section.

In Figure 1, A indicates the major axis (maximum diameter), B indicates the minor axis (diameter perpendicular to the major axis), and the oblateness is the ratio of the major axis to the minor axis, A/
Define it as B. The depression ratio is defined as the ratio C/B x 100 (%) of the maximum depth C of the bay and the short axis.

As for the flatness, the larger the value, the worse the flexibility, bulkiness, and heat insulation properties, but if it exceeds 4.5, the hair becomes excessively soft, the hair handling properties are poor, and fibrillation becomes easy, which is not preferable. In other words, the flatness ratio needs to be 1.2 to 4.5, and 1.
3 to 4.0 is preferred, and 1.4 to 3.5 is most preferred.

The concave portion, that is, the bay portion, prevents the raised hairs from coming into close contact with each other and improves bulkiness, heat insulation, and hair handling properties. but,
Excessive depression tends to cause the raised hair to fibrillate, and the fibrillated raised hair deteriorates the product's appearance and hair handling properties. For this reason, the indentation ratio needs to be 15-75%, particularly preferably 20-70%, and most preferably 25-65%. The wall thickness of the C shape may be uniform, or there may be a slight difference between the center and the edges.

It is preferable that the C-shape is vertically symmetrical, but a slight deviation from symmetry is acceptable. For example, the ratio of the upper and lower areas obtained by dividing the C shape into two by the bisector of the major axis A is preferably 3/7 to 7/3, most preferably 4/6 to 6/4. The back surface forming the opposite side of the curved portion (abdomen) may be a gently bulging curved surface or may be a flat surface.

The disadvantages of pyrotechnic fluff, such as the ease of cross-cutting, are particularly noticeable in melt-spun fibers, but this is thought to be because the delicate surface is simpler and smoother than in pipe-spinning or dry-spinning. It will be done. However, it has been found that this drawback can be improved to a large extent by using fibers of the C-shaped cross section specified above with suppressed weak crimp for the fluff.

In the present invention, the crimp of C-shaped fluff is suppressed.
, (that is, the crimp/stretch rate must be 50% or less. Here, the crimp/stretch rate is determined by formula (I), and the temperature is 20°C,
Measure indoors at 65% RH.

1-1゜Coiling/compression/elongation rate--X I CO (%) (I) 0 However, lo: sample length Cc at load 2/d, )7
? : Sample length (side) 2 minutes after applying a load of 50η+'i/d If sample 7 is yarn for pile (continuous filament), make a bundle of approximately 1000 denier and a length of 3oσ without any load. Mj treatment in water at 100°C for 20 minutes to 2o″c165%
20 for items naturally dried in RH air for 24 hours
Measure twice and calculate the average value. If the sample is a short fluff cut from a napped product, use as long as possible (for example, sample length of about 5 to 40 m), make a bundle of about 50 denier, measure 20 times, and calculate the average value.

If the fluff is not crimped, the bulkiness and insulation properties will be poor, and the appearance and feel will be poor. - If the curling is too strong, the fluff will become entangled and in severe cases it will become felt and become hard.
Even in mild cases, hairballs occur and the hair is poorly handled, resulting in poor appearance and feel. However, fluff with weakened crimp and elongation ratio of 50% or less has excellent heat insulation, bulk, feel, appearance, and playability, and is comparable to the fluff of high-quality natural fur. @The compression/expansion wheel is preferably 30% or less, and 0.5 to 2
0% is particularly preferred, and 1-10% is most preferred.

Similarly, the number of curls of C-shaped fluff, that is, the number of curls per 25 mg of length under a load of 1 mg and 1 d, is preferably 2 to 40, and 3 to 40.
30 is preferred for samurai, and 4-20 is most preferred.

Various methods can be applied to obtain weak crimp as described above. The false-twisting method includes a method of heat-treating under tension after false-twisting. For example, after false-twisting, feed 10% or less while heating at a temperature similar to or slightly lower than the false-twisting temperature.
In particular, when the amount is 5% or less, the winding and crimping can be weakened. Of course, the higher the heating temperature and the lower the feed rate, the weaker the crimp is, and it is easier to obtain the weakened crimp that meets the purpose.

Spontaneous crimping of composite fibers can also be applied to the present invention. A method of weakening the crimp is to reduce the difference in shrinkage between the composite components, or to bias the composite ratio from 1/1, for example 1/2.
．． 175 grade, and a composite structure with weak crimpability (
Examples include reducing eccentricity) and heat treatment under tension.

Further, as a method for weakening the crimp, there is a method in which the napped product is attached to a rotating body, rotated, and heated while raising the napped product by centrifugal force. The present inventors have described in detail a method for processing raised products using centrifugal force in Japanese Patent Application Laid-open Nos. 56-15486 and VI, and Japanese Patent Application No. 57-39246. Of course, heating methods include methods using heated liquid, heated gas, and radiation.

2 to 6 are examples of C-shaped cross sections suitable for the present invention. In the figure, +1+, +2+, and +3+ indicate components of the composite fiber. Figure 2 shows an aspect ratio of approximately 2.6. This is an example of a composite fiber with a C-shaped joint surface with a concavity ratio of approximately 48% and a composite ratio of approximately 1/1.In order to weaken the crimpability, it is necessary to reduce the difference in the contractility of components +1+ and (2). can give. Figure 3 shows an aspect ratio of approximately 2.4. (C with a hollow rate of about 42% and a composite ratio of about 5/1.
This is an example of a composite fiber with a shaped joint surface, which has lower crimpability than the one in FIG. FIG. 4 is an example of a composite fiber in which the joint surface of two components is linear with a composite ratio of 1/1. FIG. 5 shows an example of a C-shaped cross section with a pointed tip, and since the compound direction is the major axis direction, the crimpability is weaker than that of FIGS. 2 and 4. FIG. 6 is an example of a biased three-layer composite with a composite ratio of about 3/1.

Components [11 and (3) may be the same or different.

Figures 2 to 6 show examples of composite fibers, but single component i
It's okay to be angry. In addition, the composite components have different shrinkability due to heat and swelling (spontaneous crimpability), as well as coloring, gloss,
They may have different transparency, dyeability, and other physical or chemical properties.

Figure 7 shows an example of a C-shaped cross section that has been deformed by false twisting or chemical dissolution. Contained in form.

FIGS. 8 to 10 are specific examples of cross sections of composite fibers having segments (components) with C-shaped cross sections that are suitably used for producing the napped products of the present invention. Figure 8 shows an elliptical cross-sectional fiber in which two C-shaped segments (1) and another component (4) are composited, and the component (4) is dissolved or decomposed to be removed, leaving only the C-shaped segment f+). ) C-shaped cross-section fibers can be obtained. Figure 9 shows an example in which a C-shaped segment consisting of two components il+ (21) and another component (4) are composited, and a composite C-shaped cross-sectional fiber can be obtained by removing component (4). Figure 10 is an example in which three C-shaped segments) (l) are arranged in a spiral.
It may also be a combination of two components. The composite structure is shown in Figures 8 and 9.
A parallel type as shown in the figure, a spiral type as shown in Fig. 10, etc. are suitable, but the present invention is not limited to these.

Generally, it is preferable to use a small amount of removal component (4), for example, 5
It is preferably 0% (volume ratio) or less. In order to easily obtain C-shaped cross-sectional fibers from composite fibers, it is necessary that the removed component (4) and the remaining components (1) and (2) have a large difference in dissolution or decomposition rate. For example, polyamides dissolve in strong acids, but polyesters and polyolefins do not.

Polyester easily decomposes in strong alkali, but
Polyamides and polyolefins have sufficient resistance. polyethylene terephthalate.

What is a modified polyester in which about 5 to 30% of a third component (e.g., isofucle, sulfoisophthalic acid, polyethylene glycol, etc.) is introduced by copolymerization or mixing with an unmodified substance (homopolymer) such as polybutylene terephthalate? , polyesters with significantly different decomposition properties against alkali, unmodified or less modified polyesters, and modified polyesters (removed components) can be combined. Polyamides and polyolefins can also be modified (by mixing with a third component, copolymerizing, etc.) to reduce their resistance to solvents and decomposers. As the component to be removed (4), it is advantageous to use a component that can be removed with an aqueous treatment liquid. For example, water-soluble polyamides, polyethylene oxides, conductors and modified products thereof, and polyesters that can be easily decomposed and removed with an alkaline aqueous solution are suitable. The above component (4) may be removed in fibrous form (thread-like, cotton-like), but after using the composite fiber as a napped fiber to make a napped product (structured product), the structure is treated to remove the components. The Jf method for removing (4) is Nobumoto Ujo 1. Figures 11 to 13 are specific examples of plan views of spinning orifices suitable for melt spinning fibers with a C-shaped cross section. In a spinneret for composite spinning, an internal orifice of suitable shape;
It is easy to combine the external orifices to arrange and join each component in the desired shape.

The raised product of the present invention has the above-mentioned specific C-shaped fluff.

The fluff has a nap density of 3,000 to 30,000 pieces/cd.
is required, and most preferably 5,000 to 20,000 lines/d. Of course, the products of the present invention include those in which all the raised fluff is made of the above-mentioned C-shaped fluff, and those in which different types of fluff and/or prickly fluff are mixed. Different types of fluff refers to raised fluff of 5 d or less other than the C-shaped flat filaments in the above-mentioned specific range. However, in order to maintain the excellent characteristics of the product of the present invention, it is preferable that at least 50% (by weight) of the total fluff be the specific C-shaped flat yarn, and particularly preferably at least 75%.

Stinging hair refers to piloerection exceeding 5 d. The fineness of the stinging hair is preferably 5.1 to 100 d, especially 6 to 50 d, and the average length is 2 to 50 d, which is equal to or greater than fluff.
So-called long ones are preferable.

The density of the prickly hairs is preferably about 100 to 2,000 hairs/ci, particularly about 200 to 1000 hairs/d. The cross-sectional shape of the stinging bristles, one color of luster, two curls, etc. are arbitrary, but
It is often preferable that the cross-sectional shape is flat and that there is no crimp or very weak crimp. It is often preferable for the tips of the stinging hairs to be thin.

One type of fluff may be used, and the fineness, cross-sectional shape, and gloss.

Color, dyeability (e.g. acid dye 1 dispersible dye.

It is also possible to use a mixture of a plurality of types having different dyeing properties (1) selectivity for basic dyes, etc. (1) crimpability, etc.

Of course, the gloss, color, curl, etc. of different types of fluff may be the same as or different from those of C-shaped fluff. The polymers that make up the C-shaped fluff are nylon 6, nylon 11°, nylon 12, nylon 66, and nylon 610.

Fiber-forming homopolyamides such as nylon 612, copolyamides and modified products (mixtures, etc.) containing them, and polyethylene terephthalate.

Fiber-forming polyesters such as polybutylene terephthalate and polyethylene oxybenzoate, their copolymers and modified products, fibrous polyolefins such as polyethylene and polypropylene, their copolymers and modified products, and other melt-spun products fiber-forming polymers. Also, those polymers are matting agents.

It may also contain deepening agents such as pigments, dyes, fluorescent dyes, ultraviolet absorbers, antioxidants, and lubricants.

As mentioned above, the fluff is desired to have excellent handling properties and to have little tendency to entangle or become felted. For this reason, it is preferable to apply an oil or resin with good slipperiness to the fluff surface. Oils or resins of silicone compounds, such as polyorganosiloxane, and oils or resins of fluorine compounds, such as polytetrafluoroethylene, copolymers of fluoroethylene with other vinyl monomers, poly(fluoroalkyl)acrylates, etc. It is preferable to apply a resin film to the fluff. Similarly, a little 11 for fluff polymer.
It is also preferable to contain a silicon compound or a fluorine compound (approximately 0.01 to 3%).

In the present invention, napped products and fiber structures having napped fibers refer to knitted fabrics, woven fabrics, unwoven fabrics, leather-like materials, sheet-like materials, and similar materials having cut piles of 5 or more lengths. The base fabric portion may or may not contain a rubber-like supple resin such as rubber, polyurethane, or polyester, or polyamide, polyester, or polyvinyl resin.

Flocking methods include pile weaving, loom (W type, V type, etc.), pile &
Various methods can be used such as ig, a method using a sliver knitting machine, a tufting method, and an electrostatic flocking method.

However, it is preferable to use a pile loom or pile knitting machine to flock the fibers in bundles, as this method provides the highest quality product. In the case of bundled flocking, the smaller the number of bundled fluffs and the higher the flocking density, the higher the quality of the product.

The number of bundled fluffs is preferably 100 or less, especially 80 or less, and the flocking density is 50 or more places/d, especially 100 places/d.
d or more to 1,000 locations/d is preferred.

The back side of the base fabric can be left as is, but it is impregnated with resin.

Raised, electrostatic flocked 9 Other knitted fabrics, leather-like materials (skin or lining, similar thereof), sheets, films, etc. Generally, cut-pile fabrics (burlap fabrics, non-woven fabrics, etc.) are subjected to finishing processing. Finishing processes include cutting the pile, thinning the tip, splitting or thinning composite fibers, partially dissolving and removing the pile, dyeing, and shrinking the base fabric.

Brushing of raised hair, shaping, resin impregnation of base fabric, coating, lamination, raising, surface treatment of raised hair (hydrophilic, water repellent,
There are a wide variety of treatments such as antifouling, antistatic, flame retardant, gloss, lubrication, heat treatment, etc., and these can be combined in various orders depending on the purpose. The present inventors have disclosed a method for processing a napped product by keeping the napped hair in an upright state using centrifugal force, in Japanese Patent Application Laid-open Nos. 15486-1986, 37334-1983, and 5th Patent Publication No. 56-37334.
Disclosed in No. 6-49048, patent application No. 56-472
No. 5.

It was proposed in No. 56-8318. By this centrifugal processing, cutting, thinning, dyeing, bleaching, etc. of the nap can be performed with high precision at any location on the nap. Specifically, for the purpose of the present invention, by heat-treating the raised hair caused by centrifugal force, it is possible to weaken the crimp of the raised hair, prevent entanglement, and further improve the hair handling properties. By thinning the fluff, it is possible to remove or prevent entanglement of the fluff, weaken crimp, and improve fluff handling properties. Even if the same treatment is not performed under centrifugal force, the effect of weakening the curls and improving the fluff handling property can be observed, but the fluff is made to stand up using centrifugal force, and if necessary, the curls are stretched out using centrifugal force. The effectiveness and quality are significantly inferior compared to other methods.

Regarding the shrinkage treatment of the base fabric, see Japanese Patent Application No. 162177/1983, and about the heat treatment of raised naps under converting force, see Japanese Patent Application No. 57-11.
It was described in detail in No. 57-34261, July 1987.

Shrinking the base fabric is extremely useful for increasing the density of the nap.

The raised product of the present invention obtained in this way has excellent heat retention, bulkiness, hair handling, hair movement, feel, appearance, etc. due to the characteristics of the C-shaped cross-section yarn, and is comparable to natural fur. It has a luxurious feel. According to the present invention, we have created products that are very close to natural products, unique features that are not found in natural products, such as those that consist only of fluff, those that have long fluff (for example, 25 to 60 cod), [n colors, f'4 You can get a wide variety of items, including those with a glossy finish.

In the following examples, parts and percentages are expressed by weight unless otherwise specified.

Example 1 Molecular weight 17,000. Polyethylene terephthalate (hereinafter referred to as PET) containing 1.2% titanium oxide (matting agent)
is defined as polymer P1. The oblateness obtained by melt spinning the polymer P1 through an orifice as shown in Fig. 11 is 2.5 (
Concave rate 45%, C-shaped outline similar to Figure 2, fineness 75
Filament F1 is a drawn yarn of d/60 f (single yarn 1.25 d) that is heat treated at 170°C under tension and has a hot water shrinkage rate of 6.5%. 1. Using filament F1, a two-stage heater It was crimped using a complete false twisting machine. Spinner rotation speed 340,000 rpm.

Yarn speed 100 m/m (number of twists 3,400 T/m)
, the first heater is a contact type and has a length of 1.2 m, and the second heater is a non-contact type and has a length of 90Lyn. Yarns with suppressed weak crimp are designated by FTI in Table 1, and yarns with normal strong crimp are designated by FT2. The curling/stretching rate was determined by treating the false twisted yarn in a skein shape for 30 minutes in boiling water without any load at 25°C.
Measurements were made on samples air-dried for 24 hours in air at 65% RH. The cross section of the false twisted yarn was as shown in Figure 7.

Table 1 PET stretching heat treatment with titanium oxide content of 0.6% (150
F2 is a filament of 60d15f (single yarn 12d) having a diamond-shaped cross section (oblateness 3.3) with rounded ends.

After mixing two false twisted yarns FTI and two F2, 120T/
PYI is a yarn that is heated and run in contact with a heater at 150''C at a feed rate of -2% to prevent twisting and suppress crimpability.

PE, T 1.7 d, cut length 381 m crimp staple 70%, nylon 6 2.5 d, cut length 4
Yl is a 40 count twin yarn with a blended yarn of 5 dew crimped staple of 30%.

A cut pile fabric CPI was obtained using a double pile loom using Yl for the warp (ground thread) and weft (ground thread) and PYI for the pile thread (warp). The pile length of CPI is 39cm, and the flocking density is 70 points/-, which is a W-type flocking.

CPl was immersed in a 15% benzyl alcohol aqueous dispersion for 15 minutes, squeezed, and then treated in saturated steam at 95° C. for 20 minutes to shrink the base fabric. The shrinkage rate of the base fabric is 22% in the warp direction.
, latitudinal direction: 31%, area shrinkage rate: 40%. As a result of this contraction, the fluff density becomes approximately 14,000 pieces/d.
The density of prickly hairs was about 1200/d.

The above-mentioned shrinkage-treated CPI was developed by the present inventors in JP-A-56-1
Finishing processing using centrifugal force was performed using the method disclosed in No. 5486. In other words, the CPI is attached to a cylinder with a diameter of 1 m and rotated, the raised fluff is raised by centrifugal force, and an outer container (outer cylinder) with a diameter of 1.1 m that rotates on the same axis and at the same speed is filled with processing fluid and various processing is performed. .

First, the rotation speed was set to 60Orpm (centrifugal force 200G), and after heat setting at 170℃, N2 at 97℃ was used as the machining fluid.
It was filled with a 15% aOH aqueous solution until the inner liquid level was 1 dew below the base fabric, and treated for 2 minutes to decompose and remove about 2% of the fluff on the surface. Next, a portion of the liquid was taken out and the liquid level was kept at a point 20 m from the base fabric and treated for 30 minutes to cut the fluff. Next, the processing fluid is rapidly drawn out from the base fabric to the point 29, and from this point 1
The tip of the prickly hair was gradually thinned by gradually drawing out the liquid at a rate of 1 hour in 0 minutes, and the prickly hair was cut at a position 37H from the base fabric. After quickly discharging the alkali solution, the CPI subjected to the alkali reduction process was washed with water and dried while still attached to the cylinder. Then at the same rotational speed, Miketon Polye
ster Gray T (Mitsui Toatsu Chemical) 0. ! 5
y71. Apply the dye solution of carrier 2y/l to the base fabric color, and then apply M
iketon Polyester Black G
(Mitsui Toatsu Chemical Co., Ltd.) 1. Oy/l, carrier 32
/l of dyeing solution from the base fabric to the point 23M and heated at 99℃ for 4 hours.
It was dyed for 5 minutes, washed with water, reduced washed (70° C. for 620 minutes), washed with water, and dried. Next, dimethylformamide at 70° C. was injected and filled up to a point 33 m from the base fabric, treated for 15 minutes, washed with water, dried, and taken out from a centrifuge. As a result of the dyeing and bleaching described above, the fluff had a white base and a gray upper part, and the stinging hair had a gray base, a black middle, and a slightly grayish white tip. For the finish, an aqueous dispersion of polyurethane elastomer (initial polymer) is applied from behind the base fabric using the end-of-spray method.
A fluorine-based water- and oil-repellent stain-proofing agent was applied to the raised fur using the spraying method, and the resin was cured by dry heat treatment at 180° C. and dried to obtain artificial fur AFL.

API has excellent bulk, heat retention, flexibility, and hair handling properties (easy to pass through a brush and comb, and easy to align the hair) 1. Hair movement when worn (the erect hairs move vigorously due to body movement) The hair can be easily aligned by brushing.

In addition, due to the three-dimensional dyeing, it had an excellent appearance comparable to high-quality fur such as mink.

For comparison, two false twisted yarns FT2 and three F2 yarns were mixed and twisted, and the feed rate was +3 while contacting a heater at 170°C.
Yarn PY2 twisted at 5% was used as pile yarn, and hereafter CP
Cut pile CP2 was obtained in the same manner as I, and artificial fur AF2 was obtained by further finishing in the same manner. Since the fluff of AF2 was too tightly crimped, it had poor handling properties, was hard, had poor texture and appearance, and was extremely difficult to brush.

Similarly, for comparison, a product obtained in the same manner as AFL without false twisting the filament F1 will be referred to as AF3. A filament with a circular cross section is used instead of the filament F1, and the following AF
The product obtained in the same manner as L is designated as AF4. A product obtained in the same manner as AFL using an oval cross-section with an oblateness of 2.5 (<indentation ratio O%) instead of the filament F1 will be referred to as AF5. Table 2 shows the fluff curlability and comparative evaluation of each product.

Table 2 Example 2 PET with a molecular weight of 15,000 and P with a molecular weight of 22,000
The cross section of composite melt-spun with ET at 1/1 has a shape as shown in Figure 2, with an oblateness ratio of 3.1 and a concavity ratio of 40 vif degree 7.
5d'150f (single yarn 1.5 d), 180 after drawing
The filament F3 is heated under tension with a heater at ℃.
shall be. 16 with filament F3 at feed rate +17%
CF3 is a material that has developed weak crimp by running it in contact with a heater at 0°C.

PET made by copolymerizing 5% of polyethylene glycol (hereinafter referred to as PEG) with a molecular weight of 600 and a molecular weight of 17.000.
, with a titanium oxide content of 0.7% is designated as polymer P2. Polymer P2 was melt spun and stretched.

F4 is a yarn that has been subjected to circulation treatment (150° C.) and has an oval cross section with an oblateness of 2.5 and a fineness of 20 d/if.

Two CF3 fibers and six F4 fibers were mixed, heated at 120 T0n, and brought into contact with a 160° C. heater at a feed rate of -1% to stop twisting to obtain PY3. A cut pile fabric obtained using PY3 as the pile yarn in the same manner as CPI in Example 1 was similarly shrunk and finished to obtain product AF6.

The curling/stretching rate of AF6 fluff is 9.5%, the number of curls per roll is 14.0
It was excellent in bulkiness, flexibility, hair handling, hair movement, and brushability. The fluff density is about 12,000/- and the prickly hair density is about 700/-.

Example 3 Molecular weight 1 obtained by copolymerizing 20% of PEG with a molecular weight of 3,500
Let P4 be 8,000 PETs. Removal component of P4 (4
), Pl of Example 1 was used as the C-forming component (l,
The composite was melt-spun with a cross section as shown in the figure. The composite ratio is 1/2, and after stretching, it is subjected to tension heat treatment at 160℃ to obtain a fineness of 110d/30.
A filament F4 of f was obtained. The C component has an oblateness of 2
．． 7. <Dip ratio is 42%, fineness is 1.25d. Two yarns of F4 false twisted in the same manner as FTI of Example 1 and two filaments of F2 of Example 1 were mixed and twisted (120T/Pz
) L, feed rate -1%, temperature 160℃ and stop twisting P
I got Y4. A cut pile fabric CP3 was obtained in the same manner as CP1 in Example 1 using PY4 as the pile yarn.

CF3 was treated with a 1% NaOH aqueous solution at 90°C for 60 minutes to decompose and remove polymer P4, and after washing with water, the base fabric was subjected to shrinkage treatment (area shrinkage rate 43%) with a benzyl alcohol aqueous dispersion. The finishing process is almost the same as the API of
It was thinned over 31 m and cut at 31 fl. The lower part of the fluff was gray, the middle part (15-20 fl) was bleached, and the upper part (2
The upper part of the stinging hair (25 to 3 mm) is dyed dark gray.
0 moe) is a bleached part (25-28 silk) and a dark gray part (28-3
1 silk) to obtain API.

API has bulk, heat retention, flexibility and hair handling.

The hair movement was excellent in all cases, and the appearance and feel were as good as or better than mink. API fluff has an oblateness of 2
．． 8. It has a C-shaped cross section with a concavity ratio of 40%, and the average fineness is 1. zaa (variation rate 12%), crimp/stretch rate 5.5%
, number of curls: 6.2725 m, fluff density: 14,000 pieces/
cd, and the hair density was approximately 1,200 hairs/d.

[Brief explanation of the drawing]

Figures 1 to 7 are examples of C-shaped cross sections suitable for the fluff of the product of the present invention, and Figures 8 to 10 are examples of C-forming components and removal components suitable for producing the product of the present invention. FIGS. 11 to 13 are examples of plan views of an orifice for spinning fibers having a C-shaped cross section. Fig. 1 Fig. 4 Fig. 5 Fig. 8 Fig. 11 Fig. 610] Fig. 13 ○ooooo○ Fig. 9 Fig. 12 gu≦1.

Claims (1)

[Claims] il) Flatness ratio 1.2 to 4.5, (Concavity ratio 15 to 7
Consists of melt-spun fibers with a fineness of 0.5 to 5.0 denier and a C-shaped cross-section of 5%, and has crimped fluff with a length of 54 or more and a crimp/stretch rate of 50% or less. , and a cut pile napped product characterized in that the fluff has a napped density of 3,000 to 30,000 pieces/d. (2) The product according to claim 1, wherein the average length of the fluff is 7 to 40 m. (3) The product according to claim 1, wherein the fluff has a curling/stretching of 30% or less. (4) The product according to claim 1, wherein the fluff has a curling/stretching ratio of 0.5 to 20%. (5) The product according to claim 1, wherein the number of curls of the fluff is 2 to 40,725 m. (6) Fluff concavity rate 25-65%, flatness rate 1.4-3
5. The product according to claim 1, having a fineness of 1 to 3 denier. (7) The product according to claim 1, which has prickly bristles having a fineness of more than 5 denier, an average length that is 2 f1 or more longer than the average length of the fluff, and a thinner tip. (8) The product according to claim 1, wherein the fluff is crimped by false twisting. (9) The product according to claim 1, wherein the crimping of the fluff is due to spontaneous crimping of the composite fiber. (10) The product according to claim 1, wherein the hair is flocked in a concentrated manner at a flocking density of 50 to 100 points/d. (11) The product according to claim 1, wherein the fluff is made of polyester, polyamide, polyolefin or polyether. Q odor Flattening rate 1.2~4.5, (Indentation rate 15~75
%, fineness of 0.5 to 5.0 denier, and a conjugate fiber consisting of a component with a higher dissolution or decomposition rate than the components of the segment is used as a napped fiber to produce a 1m M M product with napped fibers. A method for producing a napped product, which comprises dissolving or decomposing and removing components having a high dissolution or decomposition rate after production, and making the cross section of the napped fibers C-shaped. 13. The method according to claim 12, wherein the conjugate fiber (13) is of a parallel spiral type.