JPS6039440A - 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, particularly a napped product that has excellent flexibility, bulkiness, and covering ability, and has uniform and luxuriously tapered tips and prickles, and a method for making the same. Although many attempts have been made to obtain products with a high level of piloerection comparable to fur, they are still unsatisfactory. In advanced raised products, a double structure of thick, thick prickly hair and thin, short curly fluff is required, just like on fur, and it is also necessary to improve the prickly hair and the old hair! There are many challenges. An object of the present invention is to provide a product with excellent bristles and a method for easily producing the same. The product of the present invention is a fabric having a non-fine part where the fineness does not substantially change in the length direction, a narrow part where the fineness gradually decreases toward the tip, and a nap of 10 strands or more in length from the thin tip. V) the non-reduced portion has 1 to 2 wing-like protrusions in the cross section, has an oblateness of 1.5 to 5, and a fineness of 8 to 50 (made from a core-sheath composite fiber of 1), (mouth) The tip of the conjugate fiber is formed by exposing the core of the composite fiber, and has a substantially uniform thickness with an average diameter of 5 to 25 μm and a thickness of 0.3 to 5 μm.
It has a key length of e→ and the length of the narrowed part is 1 to 15 cm. The method for producing a raised product of the present invention consists of a fiber-forming polyester sheath and a heat-accumulable polymer core whose decomposition rate with a 1iaOH aqueous solution is 1/2 or less of that of the polyester, and whose cross section is 1 to 2 It has 3 wing-like processes, oblateness 1.5-5, average core diameter 5-25 pm, fineness 8.
A fabric-like fiber structure made of core-sheath composite fibers of ~50 d and having a cut pile of 10 mm or more in length is attached to a rotating body and rotated, and a centrifugal force is applied in the direction in which the naps stand up.
The napped product of the present invention is characterized in that the napped hair product is brought into contact with an alkaline aqueous solution while changing the contact length, gradually thinning the napped hair toward the tip, and completely decomposing and removing the sheath polymer at the tip. The stinging hair consists of a non-thinning part, a thinning part, and a tip. The tip must be uniform and even. The thickness of the tip must have an average diameter of 5 to 25 μm, and a range of 10 to 20 μm steel is particularly preferred. Similarly, the fineness of the tip is preferably 172 or less, particularly 175 to 1, of that of the non-reduced portion. The average diameter is the diameter if the cross section is circular (if the cross section is circular), or the diameter of a circle with the same area if the cross section is noncircular. The thickness of the tip is uniform in the length direction and is within a range that is considered to be substantially constant (for example, the change in average diameter is within 5096, within 411K20%). The length of the tip must be 0.5-P5cm, and 05-2mm is particularly preferable. If the tips are too short, the appearance and feel will be poor, and if they are too long, the tips will easily intertwine with each other. Similarly, the tip is too thin 6
(!-Easily entangled, and if it gets too thick, the appearance and feel will be coarse and hard.) From now on, for 111fl, the sheath of the core-sheath composite fiber will be completely removed,
The result of exposing the core is excellent uniformity. The narrowed part is the part that joins the tip and the non-thinned part, and gradually (
[continuously or in multiple stages], preferably smoothly tapering to the tip. The length of the narrowed part is extremely good for aesthetics and feel! It is necessary to have 1 to 15 fins, and 1) fins, particularly preferably 2 to 10 fins. If this length is short, the tip and the non-thinned part will be joined unnaturally, resulting in poor appearance and flexibility. Figure 1 shows a cross section of the tip of a known raised nape, showing the sheath of the core-sheath composite fiber (1). When contracted, the core (2
) stands out. In this case, since there is no tapered part at the transition between the non-finished part and the tip, the appearance and feel are rough and inferior. FIG. 2 is an explanatory longitudinal cross-sectional view of a napped fiber in which, for example, the tip of a polyester (polyethylene terephthalate surface, etc.) fiber is treated with an alkaline aqueous solution to make it thinner (sharpened in the center). Generally, the nap of polyester etc. is removed with a strong alkaline aqueous solution (
When thinning (with high speed and efficiency), irregular busy reactions progress as shown in Figure 2, causing unevenness! 4. Occasionally thin parts etc. occur (
If the tip is bent, it will break easily], and it is difficult to control it to a uniform desired thickness and length. Figure 6 shows a longitudinal cross-section of the tip of the raised hair (IIJ hair) of the product of the present invention, which uses a core-sheath composite fiber consisting of a core with relatively high resistance to an aqueous alkaline solution and a sheath with low resistance. FIG. In the figure, (1) is a polyester sheath, and (2)
where (^) is the length of the tip, ls) is the length of the attenuation, (cl is the diameter of the tip, and (nl#i is the diameter of the attenuation. The decomposition rate with an alkaline aqueous solution is low.The decomposition rate with an alkaline aqueous solution can be determined by, for example, treating fibers at 100°C with a 15% HaOH aqueous solution and calculating the ii*x minor curve (time change).
It can be expressed as the slope of the curve (tumor ftM fraction per unit time) at g6.The decomposition rate of the core polymer is small - the tip is often exposed without damage, such as #1.Decomposition of the core polymer The speed needs to be 172 or less than that of the sheath polymer, particularly preferably 115, and most preferably 1/10.

[1] The shape of the non-reduced portion of the hair is also extremely important. 1 Hair generally covers the surface of the fur, so its appearance (bulkness, waist covering, luster, color, visible thickness, etc.), feel (softness, elasticity, slipperiness), hair handling, #i If the I/C, such as heat and light resistance, is not excellent, the company cannot survive. Furthermore, the cross-sectional shape of the stinging bristles must be such that thinning by the alkaline aqueous solution proceeds smoothly. FIGS. 4 to 7 are examples of cross sections of fibers suitable for pricking hair (non-thinning portion) of the product of the present invention. In the figure, the sheath (11,
The core is indicated by (2). Figure 4 has two wing-like processes, with a core (1) in the center. The major axis is indicated by (Di), and the minor axis (diameter of the largest inscribed circle) is indicated by (E).The oblateness is the ratio of the major axis/[diameter, that is, (DJ/(gl). The width gradually decreases toward the end, and the diameter of the inscribed circle at the end must become smaller by (1?) and 4, and there must be a constriction (small M part). This is necessary because the thinning part of the piloerection is smoothly thinned by the alkali treatment.The diameter a of the inscribed circle of the pilaf is preferably 30 μm or less, particularly preferably 20 μm or less, and most preferably 3 to 10 μm. Preferably, similarly to h0, the diameter of the blade tip inscribed circle is preferably 172 or less of the minor axis (1), and 17
6 or less is particularly preferred. Figure 5 is an example in which two wings Fi are on two straight lines that intersect at an angle (f()) at an angle of 1c (■).
0° is preferable (Fig. 4 shows an example of 180°). The core may be circular as shown in FIG. 4 or non-circular as shown in FIG. The core is an important component that forms the tip of the piloerection. The average diameter of the core should be 5-25 μm, 10-20 μm
m is most preferred. Figure 6 shows an asymmetrical example in which the two wings have different color loss.
FIG. 7 shows an example with one wing. The fineness of the stinging hair (non-fine part) is 8 to 50 d. If it is too thick, it will be coarse and hard, and if it is too thin, the bulkiness, fuzzyness and luster will be inferior. The fineness of the stinging hair is particularly preferably 10 to '50 d. The flattening ratio of the e-thinned part must be 1.5 to 5,
Particularly preferably 2 to 4. If the flatness is too large, the raised hairs will become excessively flexible and will easily form a 74 grill. On the other hand, if the flatness is too small, the flexibility, luster, covering ability, and heat-retaining ability of the nape will be poor.In this way, the nape with one or two wings in its cross section will have poor bulk, waist, flexibility, luster, etc. In this respect, it is not only excellent as a hair cutter, but also has excellent hair handling and glassing properties, and has the excellent feature of being easily thinned into beautiful, smooth, and uniform hair. The sheath polymer is a strong alkali (MhOHs ICOH'I
i) It must be easily decomposed by aqueous waves. Suitable polymers include fiber-forming polyesters such as polyethylene terephthalate, polyethylene terephthalate, polyethylene oxybenzoate, and boridimethylcyclohexane stalate, and copolymerized polymers containing these as the main component (50% or more) and a sixth component. Or a mixed modified polyester can be mentioned. The core polymer is a polymer that has greater resistance to alkaline aqueous solutions than the sheath polymer, and includes, for example, polyamide, polyolefin, polyvinyl, polyurethane, and polyester with a low degree of modification or unmodified. The core and sheath are preferably those that can be melt-spun into a composite material, and are preferably mutually adhesive. Unmodified or modified polyethylenetere-7-thalerate (hereinafter referred to as pBT) is optimal as the core polymer. This is one example. In other words, it has high resistance to alkaline aqueous solutions, and has adhesive properties to other polyesters such as Ld polyethylene terephthalate (hereinafter referred to as PIT).Furthermore, since the curve has a high elastic recovery rate against distortion, etc., the tip of the raised nap It has the feature of correctly holding the shape and being difficult to entangle. Examples of polyesters that can be mated with the PaT core include modified PBT copolymerized or mixed with a third component of 1 to 50%, PIitT% modification rate (
PgT (copolymerization or mixing ratio) of 1 to 30%, other fiber-forming polyesters with a modification ratio of 1 to 60%, and the like. Examples of modification by copolymerization of polyester include:
Linear dicarboxylic acids such as adipic acid and sepacic acid, aromatic dicarboxylic acids such as inctaric acid, sulfoisoheptacuric acid, and naphthalene dicarboxylic acid, and FMtal such as ethylene glycol, gtylene gelicol, and hexpundiol.
"J: ff+7jz, 1 to 60% (by weight) of polyalkylene glycols such as polyethylene glycol, polyglopylene glycol, and polyglutylene gellicol.
A product that has been copolymerized to some extent can be opened. Examples of modification by mixing include polyalkylene glycols, aliphatic, polyesters (polyethylene adipate, polybutylene adipate, polycaprolactone, etc.), polyalkylene glycol/polyester block copolymers, aliphatic/aromatic copolymer polyesters, etc. A melt-mixed mixture of about 1 to 30% of the following materials can be obtained by l-1'. In particular, when a compound having a sulfone group or an ether bond is copolymerized or mixed, the resistance to alkali is reduced and the modification effect is large. Unmodified PET and other homobolite esters are also preferred after PBT as the core polymer, and the sheath polymer to be combined therewith is preferably modified pgTs51' PBT and other modified polyesters. When the sheath and the core are made of the same type of polyester, it is often preferable that the sheath's modification rate (both 1 or mixed ratio) is 1 to 60% higher than that of the core, especially 5 to 2096. . Addition of matting agents such as titanium oxide, coloring agents, etc. to the core and sheath polymers is optional, but in order to obtain good gloss, the addition rate of matting agents should be 0.5% or less, especially 0.
．． It is preferably 2% or less. The above-mentioned core-sheath composite fiber can be manufactured by well-known melt composite spinning. The same components are melted and weighed separately and combined at a core/sheath composite ratio of, for example, '/2 to '150, particularly 115 to 1/2, and then spun from a flat spinning office, cooled, oiled, and wound up. It must be used as pile yarn, etc. in the form of continuous filaments or woven yarns that have been drawn and heat treated according to ILK. If the system is run at high speed (2000 m/min or more, especially 4000 m/min or more, stretching may not be necessary.Also, when used as pile yarn, it may be used by doubling, pliing, twisting, blending, etc. with yarn for fluff. Although the well-known pile knitting loom, sliver knitting machine, tufting method, electrostatic flocking method, napping method, etc. can be used to produce raised products, the pile knitting loom is most suitable because of its high uniformity.These methods After making the hair into a cut pile product with the desired length (101 or more), cutting the fluff, thinning the tip of the hair, dyeing, bleaching, finishing, backing, plush, etc. are performed as necessary to make the artificial fur. The fineness of the fluff is 5 d or less, preferably 3 d or less, and O,
It is also preferable that S~2d be shark. It is preferable that the fluff be appropriately crimped, and the cross section may be circular or non-circular (for example, a hikokutan or dumbbell shape is preferable). The material polymer may be polyamide, polyester, polyvinyl, etc., but polyester that can be cut with an alkaline aqueous solution is preferred. The density of fil hair is 5000-3 in the final product
0,000 wood/-, especially 5,000 to 20,000 wood/c
A value of about d is preferable. Density of stinging hairs is 200 to 2000 wood/
It is preferable to have a cd of about 300 to 1,200 wood/-, and it is easy to transplant the hair so that the hair stands within this range. It is also possible to increase the nap density by shrinking the base fabric during the processing process. Zero Inventor Toku published Japanese Patent Application Publication No. 56-1548 on an advanced processing method for napped products using centrifugal force and the products obtained thereby.
No. 6, No. 56-37334, No. 56-49048,
It was disclosed in No. 57-117648, No. 57-121645, etc. This centrifugal processing method can be applied to the present invention to perform fluff cutting, thinning, dyeing, bleaching, etc. A preferable method for cutting fluff is to use centrifugal force to stand up fluff fibers that have a higher decomposition or dissolution rate than prickly hair, and then cut the portion beyond a predetermined distance from the base fabric by immersing it in an aqueous alkaline solution or the like. . In order to minimize the thinning or damage of the fluff during the fluff cutting process, it is desirable that the rate of decomposition of the fluff by the alkaline aqueous solution is higher than that of the prickly hair. In fact, by making the fluff thin enough to 111 mm, even if it is made of the same polymer as the stinging bristles, it will be cut quickly, and the damage to the weight bristles at that time will be almost negligible (less than 20% diameter reduction, especially KID% or less). Of course, use a V-1 hair polymer that has a higher decomposition rate with an alkaline aqueous solution than the stinging hair polymer, for example, one with a speed ratio of 1.5 or more, especially 6 or more. Thinning and damage can be virtually ignored (the weight can be reduced by 10% or less, especially 5% [lower]).The thinning of the light width of the stinging hairs, as well as by raising the stinging hairs with centrifugal force, from Motomata. Gradually change the immersion depth of the alkaline aqueous solution from the desired distance O (starting point) to another desired distance III (end point)
A preferred method is to move the liquid level and partially dissolve and remove the sheath of composite IIIt#li. Of course, the tip of the piloerection t@ completely removes the sheath to the desired extent. Composite edge I11# having the above-mentioned wings and having a core with high resistance to alkali due to a lint-like napping thinning process.
'i is extremely smooth and uniform and gradually becomes thinner. The centrifugal processing method can also be applied to dyeing, decolorizing, etc. of the raised hair, but it is detailed in the above-mentioned Japanese Patent Application Laid-Open No. 2003-12000, so it will be omitted here. According to the present invention, it has nine raised hairs with a uniform tip and smooth thinning part, has an excellent burning appearance, has excellent ffK bulkiness, waist, flexibility, gloss, ease of use, tactile sensation, and lightness, and has natural fur. It is possible to easily produce artificial fur of a high quality comparable to that of In the following examples, fil- and %H are weight ratios unless otherwise specified. Relative viscosity ij 17 z /-l/tetrachloroethane-1/l (volume ratio) m mixed solvent 1g6
Solution, measured at 20°C. Example 1 Polymer P1 has a relative viscosity of 2,450 i'BT. Polymer P2 is a modified PIaT polymerized with polyethylene glycol t-5%M having a molecular weight of 600, a relative viscosity of 1.80, and a titanium oxide content of o and 1%. The decomposition rate of Pl by alkali IJK is about 1/11 of that of P2. Polymer P1 was used as a core, polymer P2 was used as a sheath, and both halves were melt-spun into a core-sheath type. It was spun from a slit-shaped oriice with a thick center at 285°C, cooled and oiled, wound at a speed of 1200 m/min, rolled at 90°C to 3.6 times the original size, and heat-treated at 150'C under gJ tension. Thus, a drawn yarn Y1 having a transverse V# plane of e140d/7f (single yarn 2Dd) as shown in FIG. 4 was obtained. The major axis of the cross section of Yl (DJ is +10
p ms short axis (II 35 pt m-oblateness 3.1
4. The diameter of the inscribed circle at the tip of the blade is 12 μm, and the diameter of the core is 15 μm (equivalent to about 2.5 d). Modified PET (copolymerized with 4% sodium sulfoiso7curate and 3% polyethylene glycol with a molecular weight of 600).
Relative viscosity 1.72 J containing 07% titanium oxide viscosity is melt-spun, stretched and heat treated, 150d/11Dr% horizontal t.
It is assumed that the yarn having a hikokutan shape (oblateness 2.2) is Y2. Y2 has a twist number of 2400T/m. The yarn was false-twisted at 2nO<0>C and heat-treated with a non-contact heater at 220T under weak tension to obtain a yarn yr2 with suppressed shrinkage of 9 turns. One piece of Yit and one piece of yr were mixed uniformly with an air jet nozzle and heated at fC of 90 T/m to obtain PYi. PYl is used for pile yarn, and ordinary polyester spun yarn (
A quad pile fabric cp1 was obtained using a single yarn of 1.5 d, equivalent to 40 count double yarn - 266 d] as warp and rutted yarns. The cpl's flocking density is 75 places/ed% W-type flocking pile 34 times. The CPI is centrifuged by the method disclosed in Japanese Patent No. 56-15486. In other words, crt is a circle with a diameter of 1 m #
! 1 (inner 11i), rotated at a speed of 60 Orpm (centrifugal force of approximately 200 GJ) together with a cylindrical machining liquid container (outer 11 l) with a diameter of 1.1 m, and heated the outer cylinder to approximately 150°C with infrared rays.
Heat it up and let it ripen in the dark for 15 minutes. Next, the outer cylinder 1c NaOH1
A 5% aqueous solution was gradually injected until the inner liquid level reached the point of 22 cods on the CPl base fabric. After processing at 100° C. for 10 minutes, the alkaline solution was drained and washed with water. With this treatment, the vU of the fluff was cut off at 22 fin points from the base fabric, but the damage to the stinging hairs was slight (diameter reduction rate of about 8%). Next NaOH:i! Gradually inject the 096 aqueous solution to the outside, first keeping the wave surface at about 66 cm from the base fabric,
Treat at 100℃ for 15 minutes, then reduce the liquid level from 6'5 cod to 2
After moving to 7s1 for 45 minutes, the liquid was drained and washed with water. this! & The tip of the stinging hair is thinned by the process, and the tip has a diameter of about 15 mm.
The diameter of μm is about 2 μm, and the core polymer is hardly damaged. The rate of decomposition of the core polymer (PBT) by alkali is approximately 1/1!0 of that of the sheath polymer. The length of the thinned part is about 7 mm, and the long diameter of the non-thinned part is about 102 μm1.
The minor axis is 53 μm, which is slightly thinner than the untreated (root) part, but it maintains its original shape. Fill up to a point 2m from the cloth, treat at 98℃ for 20 minutes,
After draining and washing with water, fill the base fabric with a 1.2f/I aqueous solution of the same dye from the base fabric to the end of tone 23 and treat at 98°C for 20 minutes, drain,
Washed with water. With this treatment, the fluff turns light brown and the prickly hair t:l:
(23m and upper part) was dyed dark brown.Next, 1 Nitsuburin Salt CM-7, 10F#.Hydropuruffit 5F#, soda ash 3F/L amicudin D2f/j, chlorbenzene IF/ 1 aqueous solution to a point 29m from the base fabric, treated at 98°C for 60 minutes,
j! Gradually raise the liquid level to 26m from the base fabric in 50 minutes.
After reaching the point, the liquid was drained and washed with water. As a result of this treatment, the tip 4m of the 111 hair was bleached to a pale brownish gray close to white, and the lower 4mm was bleached in a blurred manner. Next, change the rotation speed by 30 Orpm (approx. 500) K, and apply fluororesin-based water congratulatory oil, antifouling agent, and water dispersion to the base fabric.
Fill with wtt to the level of horse mackerel, drain immediately, and after draining, tighten the outer hook to 160 liters.
After processing for 20 minutes while keeping at ℃, it was taken out from a centrifuge, and a 1MIK polyurethane mb aqueous solution was applied as a base fabric and dried to obtain artificial hair ysF1. For comparison, a core-sheath composite fiber (circular cross section, single yarn 20d), which is a composite of polymers P1 and P2 concentrically, was used as a replacement for Y1, and the artificial fur obtained by processing in the same manner as CPI was used as 8F2. shall be. For comparison, a fiber (single yarn 20d) with a flat cross section similar to Yl made only of polymer P2 was used! The artificial fur used as a replacement for 1 and processed in the same manner as 01'1 will be referred to as 8F5. 8! '1 to 8250 towns and hair compared from various points of view results are the first! Shown in l. Table 1 Note: o=Good, ΔLight, \Poor, ×=Poor When the tip of the stinging hair is bleached as in the above example, the uniformity of the tip and the smoothness of the thinning part are particularly clear. It is visible to the naked eye, gives an excellent impression of obsceneness, and gives an impression of obscurity with poor uniformity and smoothness. In particular, when the tips of the hairs with a low matting agent content have been partially bleached or completely bleached, the light and dark areas show a marked contrast depending on the light source and viewing angle. When the raised hair is shaped into a wavy shape, for example, a complex three-dimensional pattern is created. effective. This effect is uniform at the tip and narrowing part. be. Example 2 Artificial fur sr4 was obtained in the same manner as 8F1, except that PIeT with a relative viscosity of 1.8 was used as the core polymer instead of polymer P1 in Example 1. In this case, the rate of alkaline degradation of the core polymer is about 173 times that of the sheath. The tip of sr4 had some fIA scratches, but when compared with 5r3VC, it was very slight, and it was sufficiently beautiful and had excellent crossability. Example 3 A variety of artificial furs with different tip diameters were obtained in the same manner as in Example 108rl, except that the core/sheath composite ratio of the hair fibers was changed. The reaction conditions were adjusted to 111 so that the length of the tip was 2cm. Table 2 shows the relationship between the diameter of the tip and the properties of the hair tip of the product. $2 Table Various artificial furs were obtained in the same manner as 81F1 in Example 1, except that the flatness of the filament fibers was changed. Table 5 shows the relationship between flatness and product properties. Table 6

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of a composite fiber with a protruding core, Fig. 2 is a longitudinal cross-sectional view of the tip of polyester nap thinned with strong alkali, and Fig. 3 is an example of the tip of the prickly bristles of the product of the present invention. FIG. FIGS. 4 to 7 are examples of T&# sides of core-sheath composite fibers suitable for the stinging hair of the product of the present invention. Figure 1 Figure 2

Claims (1)

[Claims] (1) A non-refined portion whose fineness does not substantially change in the length direction;
In a fabric-like edge line structure consisting of a thinning part whose fineness gradually decreases toward the tip and a thin tip, and having a nap of 10 W@ or more in length, (a) the non-thinning part has a diameter of 1 to 2 in the cross section. Contains several true processes, flatness 1.5~5, fineness 8~
5°, the average diameter is 5~25 μm, uniform thick E→
A napped product characterized in that the length of the thinned part is 1 to 15 fines. (2) the composite fiber sheath is made of fiber-forming polyester;
The product according to claim 1, wherein the core is made of a thermoplastic polymer whose decomposition rate with an aqueous NaOH solution is 172 or less between the lines. ('5) The product according to claim 1, wherein the tip has an average diameter of 10 to 20 μm and a length of 0.5 to 2 mm. (4) The product according to claim 1, wherein the length of the narrowed portion is 2 to 100 mm. (5) In addition to the above-mentioned napped hair with a fineness of 8 to 50 d and a fine tip (hereinafter referred to as 1 hair), iA riri hair is also shortened by at least 3 fi in length and has a fineness of 5 d or less (hereinafter referred to as fluff). ]
A product according to claim 1 having: (6) The product according to claim 1, wherein the tip is a polyethylene Tele 7 crate or a polyethylene Tele 7 crate. (7) Sheath J made of fiber-forming polyester, NaOH
The decomposition rate with an aqueous solution is 172 times higher than that of the polyester.
A core-sheath composite consisting of the following thermoplastic polymer core, having 1 to 2 wing-like protrusions in the cross section, an oblateness of 1.5 to 5, an average core diameter of 5 to 25 μm, a fineness of 8 to 50 d. A fabric-like A-fiber structure having cut piles with a length of 10 centimeters or more from the fibers is attached to a rotating body, rotated, and centrifugal force is applied in the direction in which the raised piles are raised. A method for producing a napped product, characterized by bringing the lengths into contact with each other, gradually thinning the napped hair toward the tip, and completely decomposing and removing the sheath polymer at the tip. (8) Claim 4, wherein the decomposition rate of the core polymer by the IfaOH aqueous solution is 115 or less than that of the sheath polymer.
The method described in Section J57.