JP3148118U - Non-woven fabric for wool-washable collar back - Google Patents

Abstract

The present invention provides a nonwoven fabric for a wool mixed washable collar that can prevent shrinkage due to washing, which is a drawback of wool fibers. SOLUTION: A wool-mixed washable collar back nonwoven fabric obtained by blending wool fiber and synthetic fiber, from which part or all of the scale has been removed by oxygenation treatment (descaling process), wherein the wool fiber and the synthetic fiber are , Entangled by needle punch and / or hydroentanglement or stitch bond. Moreover, 10-80 weight% of wool fibers and 90-20 weight% of synthetic fibers are comprised, and the said synthetic fiber is polyester or nylon. [Selection] Figure 1

Description

  The present invention relates to a wool-mixed washable collar back nonwoven fabric capable of preventing shrinkage due to washing, which is a drawback of wool fibers.

  Due to the spiral structure of the fiber itself, the wool fiber is rich in heat retention and stretchability, and is characterized by hygroscopicity, release properties, color development, slimy tactile sensation, and waterproofness. It has been useful for many years. Here, the wool fiber is a fiber having a scaly layer (hereinafter referred to as scale) collected from wool, goat, llama, alpaca and other terrestrial mammals. Among them, wool and cashmere are prized. ing. However, these wool fibers have the above-mentioned advantages, but also have the disadvantage that they are inferior in insect-proofing performance and shrink-proofing performance. In particular, the poor shrink-proof performance causes shrinkage during washing, and wool fiber products have been regarded as fiber products with poor handleability.

  The cause of poor shrinkage performance of wool fiber products is due to the scale existing on the fiber surface, and there is a difference in the frictional force between the fibers in the direction opposite to the scale formation direction (pure scale direction). The movement between fibers caused by the stagnation action during washing is biased in one direction (pure scale direction), resulting in poor dimensional stability. In addition, when moisture is present, the end cuticle (the innermost layer of the hair epidermis) existing inside the scale swells, the scale rises, promotes friction anisotropy, and increases the shrinkage caused by washing with water. Yes.

In order to solve these drawbacks, various methods have been tried in the past, and the main ones are as follows.
(1) Method of removing scale Treat with chemicals such as hypochlorous acid, dichloroisocyanuric acid, persulfuric acid. (For example, refer to Patent Document 1).
(2) Method of coating scale surface with resin Interfacial polymerization is performed on the fiber surface to form a polyamide resin, or a polyurethane resin is applied by a pad-dry cure method. (For example, refer to Patent Document 2).
(3) Method of reducing friction coefficient anisotropy Corona discharge treatment or low-temperature plasma treatment changes the friction coefficient of the fiber surface and reduces anisotropy. (For example, refer to Patent Document 3).

JP-A-8-3875 JP 2002-348775 A JP-A 63-303177

  However, in the prior art shown above, the methods (1) and (2) have a good texture unique to wool fibers, that is, moderate softness and slime feeling are impaired, shrinkage reduction effect, and prevention of felting. There is a drawback of being insufficient. Moreover, since the method (3) requires a special vacuum vessel and a discharge device, a large capital investment is required. In addition, because wool contains a large amount of moisture, it is difficult to maintain a reduced-pressure atmosphere. To solve this problem, heat treatment must be performed to dissipate the moisture before placing it in a vacuum vessel. Presently have various problems in terms of reproducibility and reproducibility. An object of the present invention is to provide a wool mixed washable collar back nonwoven fabric having excellent dimensional stability in view of the drawbacks of the prior art.

  The nonwoven fabric for wool mixed washable collar back of the present invention is obtained by blending synthetic fiber with wool fiber from which part or all of the scale has been removed by oxygenation treatment, and the wool fiber and synthetic fiber are combined with needle punch and / or It is characterized by being entangled by hydroentanglement or stitch bond. Further, the wool fiber is composed of 10 to 80% by weight and the synthetic fiber is composed of 90 to 20% by weight, and the synthetic fiber is polyester or nylon.

  Further, the oxygenation treatment is carried out on a fiber bundle of 100% wool fiber with a wetting material and monopersulfuric acid and hypochlorite which react with the wool fiber at different reaction rates and together give the wool fiber with shrinkage resistance. An aqueous solution containing sodium acid is adjusted to a pH of 3 to 5, and the wool fiber bundle is passed through a pair of nip rollers so that the desired amount of the aqueous solution is uniformly contained in the wool fiber bundle. Or it sprayed and it processed so that the weight with respect to the weight of the said wool fiber might be 2.0% owf.

  According to the present invention, since the wool fiber is subjected to oxygenation treatment (shrink-proof treatment by descaling), shrinkage and felting during washing can be prevented. Further, durability and easy care can be improved by performing needle punching and / or hydroentanglement or stitch bonding between wool fibers and synthetic fibers (polyester or nylon, etc.). Further, since the wool fiber is composed of 10 to 80% by weight and the synthetic fiber is composed of 90 to 20% by weight, the texture, gloss, and color of the wool are not impaired.

  The nonwoven fabric for wool mixed washable collar back of the present invention is obtained by blending synthetic fiber with wool fiber from which part or all of the scale has been removed by oxygenation treatment, and the wool fiber and synthetic fiber are combined with needle punch and / or It is characterized by being entangled by hydroentanglement or stitch bonds. Further, the wool fiber is composed of 10 to 80% by weight and the synthetic fiber is composed of 90 to 20% by weight, and the synthetic fiber is polyester or nylon.

  First, part or all of the scale of the wool fiber is removed by oxygenation treatment. FIG. 1 shows a photomicrograph of untreated wool fibers, and FIG. 2 shows a photomicrograph of descaled wool fibers. Wool fiber has an extremely complex structure of epidermis cells, cortical cells, and an aggregate of cells that join them. The epidermal cell is composed of a non-keratin endocuticle that contains many hydrophilic amino acid residues and an exocuticle that contains a large amount of cystine (-SH) and a hydrophobic and hard structure keratin protein. It has a structure in which it is wrapped with a thin hydrophobic epicuticle.

  The oxygenation treatment according to the present invention removes part or all of the epicuticle of the epidermal cells, thereby preventing shrinkage and felting during washing. Oxygenation treatment of wool fiber is a monopersulfuric acid and hypochlorite which reacts with wool fiber at a different reaction rate on fiber bundles of 100% wool fiber, and together gives shrinkage to the wool fiber. An aqueous solution containing sodium acid is adjusted to a pH of 3 to 5, and the wool fiber bundle is passed through a pair of nip rollers so that the desired amount of the aqueous solution is uniformly contained in the wool fiber bundle. Or it sprays and it processes so that the weight with respect to the weight of the said wool fiber may be 2.0% owf. The fiber length of the wool fiber is not particularly limited, and may be either a woolen type yarn or a spun type yarn.

  The oxygenation treatment according to the present invention is characterized by being applied to a fiber bundle of 100% wool fiber. There is also a method of oxygenating a blend of wool fibers and other synthetic fibers, but polyester or nylon cannot withstand strong oxidizing agents required for oxygenation treatment, so composite yarn with shrink-proof performance Because it is difficult to get. Moreover, as an implementation method, it can implement as an oxygenation method (a chlorination method is included) independent form, and the combination with the process by a proteolytic enzyme as a process before and / or after oxygenation process. As typical oxidizing agents, hypochlorous acid, chlorous acid, alkali metal salts of chlorinated cyanuric acid, persulfuric acid, potassium hydrogen persulfate, peracetic acid or potassium permanganate are suitable. In the case of typical sodium hypochlorite, an effective chlorine content in the range of 3 to 12% by weight is appropriate for the treated wool fiber. Subsequently, after washing with water (neutralization), the reducing agent is used to stop the oxidation, and the remaining oxidizing agent is removed by reduction. Suitable reducing agents include sodium metasulfite, sodium hyposulfite, sodium sulfite and thioglycolic acid.

  The oxygenated wool fiber is mixed with synthetic fiber and entangled by needle punch and / or hydroentanglement, stitch bond, or the like. As the synthetic fiber, nylon fiber, polypropylene fiber, polyester fiber, or the like can be used. In particular, when importance is attached to heat resistance, durability, and easy care properties, it is preferable to use a blend of synthetic fibers of short fibers such as polyester and nylon, and most preferably polyester fibers. In this case, in order not to impair the texture, gloss and color of the wool, the wool fiber is mixed with 10 to 80% by weight and the synthetic fiber is mixed with 90 to 20% by weight. In this case, the proportion of wool fibers is preferably 30% by weight or more, more preferably 60% or more.

Example 1
Ten wool tops of continuous length (each weighing 20 g per meter) were passed through the bath. The volume of this bath is 4.5 liters, and this bath contains 1.77% by weight of potassium hydrogen persulfate (the oxidizing power corresponds to the oxidizing power of 1.33% monopersulfuric acid), targitol ( A bath solution (pH is substantially 3) containing 0.5% by weight of Tergitol TMN (nonionic wetting material) and 1.83% by weight of sodium dichloroisocyanurate was fed. After passing through the bath solution, the wool was passed through a precision nip roller to adjust the bath solution content to 150% by weight. The progress speed of the wool was 5 m / min. Thus, 1 kg of wool per minute passed through the bath and precision nip roller and 1.5 liters of the bath solution was consumed.

  A liquid having the following composition was supplied to the bath. This solution comprises (1) an aqueous solution (pH 1) containing 3.54% by weight of potassium hydrogen persulfate and 1% by weight of targitol (pH 1), 750 cc / min, and (2) an aqueous solution containing 2.66% by weight of sodium dichloroisocyanurate ( pH 6) obtained by mixing with 750 cc / min. Each of the two solutions is stable over a long period of time, but the mixed solution is unstable, so the two solutions must be mixed immediately before use.

  The bath volume is 4.5 liters, and since the mixed solution or bath liquid is consumed at a rate of 1.5 liters per minute, the bath residence time in the bath is 3 minutes. This decrease in oxidizing power over 3 minutes was negligible. The residence time of the wool in the bath was 1.5 to 2.0 seconds. After passing through a precision nip roller, the wool was placed on the moving plastis. The moving speed of the platis was adjusted so that the wool stayed on the platis for 1.5 to 2.0 minutes. After that, the wool was passed sequentially through the following baths. (A) Washing bath, (b) Bath of aqueous solution (pH 7.2) containing 5% sodium sulfite, (c) Two washing baths.

  The residence time in the sodium sulfite bath was 30 seconds. After that, the wool was dried. Next, the dried wool fiber: 50% and polyester fiber: 50% (trade name Tetoron, manufactured by Teijin Fibers Ltd.) are mixed cotton, a web is formed by the card method, and then entangled by a needle punch to obtain a sample. It was.

(Comparative Example 1)
In Example 1, the sample of Comparative Example 1 was obtained from the current felt for the back of the collar, which was prepared by the press felt manufacturing method with wool: 60% and rayon: 40% not subjected to the enzymatic treatment.

(Comparative Example 2)
Non-woven fabric for collar lining of current washable type (washing test method according to Toray Machine Ace method) that does not use wool fiber uses 100% polyester fiber (commercial product name: Tetoron, manufactured by Toray Industries, Inc.), Comparative Example 1 Similarly to the above, a sample of Comparative Example 2 was obtained.

  The samples of Example 1 and Comparative Examples 1 and 2 were evaluated for performance as follows.

(Washing shrinkage)
After washing with JIS-L-0217 (103 method), the measurement was made with JIS-L-1042. The washing machine used was Toshiba VH-500M6 (TWINTUB / WASHHER). As a result, the shrinkage rate of Example 1 subjected to oxygenation treatment was 0.87% in length and 0.23% in width, whereas the shrinkage rate of Comparative Example 1 in which oxygenation treatment was not performed was longitudinal. : 3.5%, width: 3.1%, the shrinkage ratio of Comparative Example 2 was length: 0.27%, width: 0.13%.

(Texture)
About Example 1, and Comparative Examples 1 and 2, it judged by the sensory test.

  As is clear from Table 1, the sample of Example 1 is less likely to shrink due to washing than the one produced by the press felt method, does not become felt, and has excellent dimensional stability as compared with Comparative Example 1. The texture was also good.

  The present invention is capable of preventing shrinkage and felting due to washing by entanglement of descaled wool fiber and thermoplastic resin fiber such as polyester, and is excellent in handling, gloss and touch. Since a non-woven fabric can be obtained, it can be widely used not only for wool mixed washable collar cores.

The scale shows a micrograph of untreated wool fibers. It shows a photomicrograph of wool fibers subjected to oxygenation treatment of the present invention.

Claims (5)

  A wool mixed washable collar back nonwoven fabric, wherein synthetic fibers are mixed with wool fibers from which part or all of the scale has been removed by oxygenation treatment.   The oxygenation treatment is performed on a fiber bundle of 100% wool fiber with a wetting material and monopersulfuric acid and sodium hypochlorite that react with the wool fiber at different reaction rates and together give the wool fiber a shrink-proof property. The aqueous fiber solution is adjusted to pH 3 to 5, and the wool fiber fiber bundle is passed or sprayed through a pair of nip rollers so that the desired amount of the aqueous solution is uniformly contained in the wool fiber fiber bundle. The wool mixed washable collar back nonwoven fabric according to claim 1, wherein the wool mixed washable collar back nonwoven fabric is treated so that a weight relative to a weight of the wool fiber is 2.0% owf.   The wool mixed washable collar back nonwoven fabric according to claim 1, wherein the wool fiber and the synthetic fiber are entangled by needle punch and / or hydroentanglement or stitch bond.   The wool mixed washable collar back nonwoven fabric according to claim 1 or 3, wherein the wool fiber is composed of 10 to 80% by weight and the synthetic fiber is composed of 90 to 20% by weight.   The wool mixed washable collar back nonwoven fabric according to any one of claims 1, 3, and 4, wherein the synthetic fiber is polyester or nylon.

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