WO2013021751A1 - Drawn reduced-diameter animal fiber manufacturing method, restorable drawn animal fiber spun yarn, restorable drawn composite animal fiber spun yarn, restored animal fiber spun yarn, restored animal fiber cloth, drawn reduced-diameter animal fiber bundle, animal fiber bundle, fixed drawn animal fiber spun yarn, and cloth - Google Patents

Abstract

The present invention addresses the problem of manufacturing drawn reduced-diameter animal fibers relatively simply and easily while suppressing glare on the surfaces of animal fibers without complicating and upsizing a facility and reducing productivity. In this drawn reduced-diameter animal fiber manufacturing method, first an animal fiber bundle (1) is passed through a swelling and plasticization treatment device (30) to produce a swelled and plasticized animal fiber bundle (5). Thereafter, between an upstream nip portion (10N) of an upstream nip roller pair (10) and a downstream nip portion (20N) of a downstream nip roller pair (20) in side view, the swelled and plasticized animal fiber bundle is drawn while moving in the shape of an S or an inverted S from the upstream nip portion to the downstream nip portion.

Description

Production method of stretch stretched animal hair fiber, stretched restored animal hair spun yarn, stretched restored composite animal hair spun yarn, restored animal hair spun yarn, restored animal hair fabric, stretched stretched animal hair fiber bundle, animal hair fiber bundle, stretched Fixed animal hair fiber spun yarn and fabric

The present invention relates to a method for producing an extended stretched animal hair fiber in which animal hair fibers are stretched to increase the length of a single fiber and reduce the fiber diameter.

The present invention also relates to a stretch-restored animal hair spun yarn composed of a stretch-expanded diameter animal hair fiber, a stretch-restored composite animal hair spun yarn containing a stretch-stretched-animal hair fiber, a stretch-restored animal hair spun yarn, or a stretch-restored composite animal hair spinning. Restored animal hair spun yarn made of yarn, fabric containing restored animal hair spun yarn, restored animal hair spun yarn containing stretched restored animal hair spun yarn or stretched restored animal hair spun yarn, stretched stretch animal hair fiber bundle, stretch stretched diameter The present invention relates to an animal hair fiber bundle comprising an animal hair fiber bundle as a main component, a stretched and fixed animal hair fiber spun yarn composed of an extended stretched animal hair fiber bundle or an animal hair fiber bundle, and a fabric comprising a stretched and fixed animal hair fiber spun yarn.

In recent years, with the change of the four seasons, the living environment, and the change of fashion and design, the diversification of clothing has been remarkable, and the demand for animal hair fibers is increasing regardless of the seasons.

By the way, clothing for all seasons is required to have not only basic characteristics as clothing such as touch and texture, but also characteristics such as thinness, light weight, heat retention and moisture absorption quick drying. For such demands and demands, it is preferable to use animal hair fibers having a small fiber diameter. For example, in the case of general wool clothing, those having a fiber diameter of 19.5 μm to 22 μm are often used. ing. Moreover, 18.7 μm (display name SUPER100's), 16.0 μm (SUPER150's), 13.5 μm (SUPER200's), etc. are used for clothing that is thin and lightweight and has good touch and high quality brand clothing. Wool or cashmere fibers with a thinner outer diameter are used. However, since animal hair fiber is a natural product, the amount of hair production below SUPER100's is extremely small, and it becomes a speculative target by increasing or decreasing the amount of hair production. For this reason, animal hair fibers tend to be expensive in price, and supply tends to be unstable. For this reason, in the textile industry, it has been desired to develop a technique capable of producing animal hair fibers having a small fiber diameter and stable quality at low cost.

In response to such demands, many technologies have been developed in the textile industry with years of wisdom and ingenuity. As these general techniques, an animal hair fiber having a thick count (fiber having a large fiber diameter) is stretched to be elongated and an animal hair fiber having a fine count is manufactured by reducing the fiber diameter. .

Such fine count animal hair fibers usually have a step of twisting an animal hair fiber bundle, a step of swelling and plasticizing the twisted animal hair fiber bundle, a cross-linkage or a hydrogen bond of the animal hair fiber. To reduce the animal hair fibers, to stretch the swollen plasticized animal hair fiber bundle after the reduction treatment, and to fix the stretched swollen plasticized animal hair fiber bundle in the stretched state. In order to stabilize the process and the immobilization process, it is manufactured through a process of oxidizing the swollen plasticized animal hair fiber bundle.

Specifically, in the past, “the fiber assembly is treated so that the fiber assembly that runs substantially untwisted is processed to plasticize the fiber so that a substantial draft of the fiber assembly does not occur during stretching. In a method of sufficiently twisting and setting the stretching, a method is proposed in which the twist applied to the fiber assembly is set as a false twist, the fiber assembly is stretched, and the stretching is applied while being set. '' (See, for example, Japanese Patent Publication No. 05-500989). However, when the fiber assembly is stretched in a state where the fiber assembly plasticized in this way is twisted, the contact portions of the fibers twisted by the twist are pressed against each other by the external force during stretching, Uneven marks are formed at the contact area. As described above, the fiber having irregularities on the surface of the single fiber is likely to cause glare. Furthermore, since heating, twisting and stretching for stretching the fibers are performed in the same facility, there is a problem that the facility is complicated and large. Further, in this method, in order to set the stretched fiber assembly, it is necessary to maintain the twist by rotating the fiber assembly even when the fiber assembly passes through the steam chamber. For this reason, such a method is complicated.

In addition, in the past, after immersing an untwisted sliver of animal hair fiber having a fiber length of 30 mm or more in hot water or chemical solution at 80 ° C., the untwisted sliver of animal hair fiber was first placed between the first six nip rollers. Stretched by 05 times, then stretched by 1.49 times between 6 nip rollers, and at the same time, a reduction set was performed by steaming with a steam pressure of ² kg / cm ^2. A method in which a non-twisted sliver of hair fibers is put into a top dyeing machine, oxidized with 1% hydrogen peroxide under conditions of pH 7, 40 degrees C, 10 minutes, then washed with a backwasher and dried. It has been proposed (see JP 07-003556 A). In such a method, unevenness is not formed on the surface of the fiber and the glare of the fiber is suppressed. However, troubles such as winding of the loose fiber around the drawing roller are likely to occur, resulting in a decrease in productivity. The associated high costs are a problem. Further, in this method, stretching is performed in the swelling liquid, and the immobilization treatment is performed under a vapor pressure of ² kg / cm ² , so that the process and the equipment structure are complicated and complicated.

Further, in the past, after the actual twisted animal hair sliver was sent to the pretreatment tank for plasticization and swelling, the actual twist plasticized animal hair sliver was nipped by a first nip roller group composed of a top roller and a bottom roller. In the reduction treatment liquid tank and the steam treatment machine placed between the "first nip roller group" and the "second nip roller group composed of a top roller and a bottom roller downstream thereof" After passing through the chemical animal hair sliver, it is drawn using the difference in rotational speed between the nip rollers, and the stretched real twist plasticized animal hair sliver is sent from the water bath to the oxidation tank, and then in the neutralization tank. Proposed a method of neutralizing the actual twist plasticized animal hair sliver with about 1.01 times tension applied to the actual twist plasticized animal hair sliver and then untwisting the actual twisted animal hair sliver with an untwisting machine Is (See JP 2001-003238 A). In this method, tension is applied to the animal hair sliver for a very long time from the initial stage of drawing to untwisting with an untwisting machine. Therefore, in this method, the fiber is cut during the mechanical or chemical treatment, and troubles such as short fibers that fall off wind around the drawing roller or float in the treatment tank are likely to occur, resulting in a decrease in productivity. In addition to the high costs involved, there is also a problem that manufacturing equipment becomes heavy and long.

Japanese National Patent Publication No. 05-500989 JP 07-003556 A JP 2001-003238 A

An object of the present invention is to provide a method for producing a stretched and contracted diameter animal hair fiber relatively easily while suppressing glare on the surface of the animal hair fiber without complicating or increasing the size of the facility and reducing the productivity. It is in.

A method for producing an extended stretchable animal hair fiber according to an aspect of the present invention is performed in an apparatus for producing an extended stretchable animal hair fiber including a swelling plasticizing apparatus and a stretching mechanism having an upstream nip roller pair and a downstream nip roller pair. Is done. In the swelling plasticization processing apparatus, the animal hair fiber bundle is subjected to the swelling plasticization treatment with the swelling plasticizer to produce the swelling plasticized animal hair fiber bundle. The “swelling plasticizer” herein is an aqueous solution containing, for example, an appropriate mixture, additive, hydrogen bond cleaving agent, cross-linking cleaving agent, hydrophobic bond relaxing agent, etc. It is used for facilitating drawing by softening animal hair fibers in the animal hair fiber bundle or plasticizing the animal hair fibers by cutting the crosslinks in the animal hair fibers. The upstream nip roller pair includes a first upstream roller and a second upstream roller. The first upstream roller and the second upstream roller are arranged so as to contact each other, and an upstream nip portion is formed at the contact portion. Further, the downstream nip roller pair includes a first downstream roller and a second downstream roller. Note that the first downstream roller and the second downstream roller are disposed so as to contact each other, and a downstream nip portion is formed at the contact portion.

Then, in this method for producing an elongated stretched animal hair fiber, first, the animal hair fiber bundle is passed through a swelling plasticizing apparatus to produce a swollen plasticized animal hair fiber bundle. After that, when viewed along the rotation axis of the first upstream roller, the swollen plasticized animal hair fiber bundle is S from the upstream nip portion toward the downstream nip portion between the upstream nip portion and the downstream nip portion. The swollen plasticized animal hair fiber bundle is drawn in a state of flowing in a letter shape or an inverted S shape. That is, in this method for producing an elongated stretched animal hair fiber, the swollen plasticized animal hair fiber is in a state in which the swollen plasticized animal hair fiber bundle is in close contact with the second upstream roller and the first downstream roller in the drawing mechanism. The bundle is stretched. Further, in this method for producing an extended stretchable animal hair fiber, the swollen plasticized animal hair fiber bundle is separated from the second upstream roller until it comes into contact with the first downstream roller (hereinafter referred to as “drawing zone”). It is possible to perform a stretching process of 80% or more of a desired stretching ratio at a very short distance. For this reason, in this method for producing an elongated stretchable animal hair fiber, even an untwisted animal hair fiber bundle containing relatively short single fibers can be stably and uniformly stretched. Therefore, according to this method for producing an extended stretchable animal hair fiber, it is possible to produce an extended stretchable animal hair fiber having a stable quality while suppressing surface glare. After the stretching treatment, the swollen plasticized animal hair fiber bundle is preferably dried after being washed with water.

As described above, the device for producing stretchable animal hair fibers is designed based on a very simple process. For this reason, the manufacturing apparatus of the stretchable diameter animal hair fiber which concerns on this invention is compact, and can reduce a capital investment cost.

Note that, in this apparatus for producing an elongated stretchable animal hair fiber, when viewed along the rotation axis of the first upstream roller, the rotation axis of the first upstream roller and the rotation axis of the second downstream roller are connected. It is preferable that a virtual straight line or a virtual extended straight line intersect with a virtual straight line or a virtual extended straight line connecting the rotation axis of the second upstream roller and the rotation axis of the first downstream roller. The swollen plasticized animal hair fiber bundle includes an upstream nip portion, a second upstream roller, a first downstream roller, and a downstream nip portion in this order, a first upstream roller, a second upstream roller, a first downstream roller, and Contact the second downstream roller. Note that a virtual line or a virtual extension line connecting the rotation axis of the first upstream roller and the rotation axis of the second upstream roller, and a rotation axis of the first downstream roller and a rotation axis of the second downstream roller are connected. The virtual line or the virtual extension line may be parallel or crossed.

Further, in this apparatus for producing an elongated stretchable animal hair fiber, the linear distance between the rotation shaft of the second upstream roller and the rotation shaft of the first downstream roller is such that the rotation shaft of the first upstream roller and the second downstream roller It is preferable that the distance is shorter than the linear distance from the rotation axis of the roller. The first upstream roller, the second upstream roller, the first downstream roller, and the second downstream roller preferably all have the same radius.

Moreover, in this method for producing an elongated stretchable animal hair fiber, when viewed along the rotation axis of the first upstream roller, the swollen plasticized animal hair fiber bundle is at least a specific outer peripheral surface of the second upstream roller. It is preferable to contact a portion (hereinafter referred to as “first outer peripheral surface portion”) and a specific outer peripheral surface portion (hereinafter referred to as “second outer peripheral surface portion”) of the first downstream roller. Note that the first outer peripheral surface portion refers to "the rotation axis of the first upstream roller and the rotation of the second upstream roller" from the "upstream nip portion" when viewed along the rotation axis of the first upstream roller. This is the outer peripheral surface portion of the second upstream roller up to the intersection of the virtual extension line connecting the shaft and the outer peripheral line of the second upstream roller on the opposite side of the upstream nip. Further, when viewed along the rotation axis of the first upstream roller, the second outer peripheral surface portion is “a virtual extension that connects the rotation axis of the first downstream roller and the rotation axis of the second downstream roller. The outer peripheral surface portion of the first downstream roller from the “intersection on the opposite side of the downstream nip portion” to the “downstream nip portion” of the intersection of the “line” and “the outer periphery of the first downstream roller”. That is, the swollen plasticized animal hair fiber bundle contacts at least about 1/2 of the circumference of the second upstream roller and about 1/2 of the circumference of the first downstream roller (top roller). . The first outer peripheral surface portion and the second outer peripheral surface portion are not less than 3/5 of the outer peripheral length of the second upstream roller and the first downstream roller when viewed along the rotation axis of the first upstream roller. Preferably. In other words, the distance from the “upstream nip portion” to “the point where the swollen plasticized animal hair fiber bundle is separated from the second upstream roller” is ½ or more of the outer peripheral length of the second upstream roller. Preferably, it is 3/5 or more of the outer peripheral length of the second upstream roller. Further, the distance from “the point at which the swollen plasticized animal hair fiber bundle first contacts the first downstream roller” to the “downstream nip portion” is ½ or more of the outer peripheral length of the first downstream roller. Preferably, it is more preferably 3/5 or more of the outer peripheral length of the first downstream roller. The longer the length at which the swollen plasticized animal hair fiber bundle is in contact with the outer peripheral surfaces of the second upstream roller and the first downstream roller, the greater the contact resistance of the swollen plasticized animal hair fiber bundle on the roller outer peripheral surface. This is because even a non-twisted swollen plasticized animal hair fiber bundle can prevent unplugging and can uniformly stretch the swollen plasticized animal hair fiber bundle.

By the way, the first outer peripheral surface portion and the second outer peripheral surface portion are formed at the upper and lower portions when the S-shape or the reverse S-shape is divided into three equal parts when viewed along the rotation axis of the first upstream roller. Equivalent to. Further, the first outer peripheral surface portion and the second outer peripheral surface portion do not face each other.

Further, in this method for producing an extended stretchable animal hair fiber, a virtual straight line connecting the rotation shaft of the first upstream roller and the rotation shaft of the second downstream roller, the rotation shaft of the second upstream roller, and the first The virtual straight line connecting the rotation axis of the downstream roller may be located on the same virtual straight line. Even in such a case, the swollen plasticized animal hair fiber bundle is composed of the first upstream roller, the second upstream roller, the second upstream roller, the second upstream roller, the first downstream roller, and the downstream nip portion in this order. Contact one downstream roller and a second downstream roller. In such a case, the imaginary line connecting the rotation axis of the first upstream roller and the rotation axis of the second upstream roller, and the imaginary line connecting the rotation axis of the first downstream roller and the rotation axis of the second downstream roller. Both lines are located on the same virtual straight line.

The environmental temperature at the time of stretching the swollen plasticized animal hair fiber bundle is not particularly limited, and is preferably in the range of 20 ° C. to 80 ° C. The viewpoint that the swollen plasticized animal hair fiber bundle can be put into the next immobilization step while the swollen plasticized animal hair fiber bundle is sufficiently contained in the swollen plasticized animal hair fiber bundle "and" there is a need for a heating source From the viewpoint of realizing a reduction in manufacturing cost, improvement in workability, simplification of equipment structure or reduction in capital investment cost ”, it should be within a range of 20 ° C. to 30 ° C. (room temperature). More preferred. The stretching may be performed in a swelling plasticizer. In such a case, the manufacturing apparatus can be made more compact.

Further, by stretching and stretching the swollen plasticized animal hair fiber bundle after stretching, the stretched shape animal hair can be temporarily retained in its stretched shape and restored to the state of substantially raw hair before stretching as necessary. Fiber (hereinafter referred to as “stretched restored animal hair fiber”) can be produced. Further, the stretched and plasticized animal hair fiber bundle after stretching is heated (fixed), oxidized and neutralized, washed with water, and dried to allow the stretched shape animal hair fiber (which can retain the stretched shape permanently) ( (Hereinafter referred to as “stretch-immobilized animal hair fibers”). That is, in the method for producing a stretched animal hair fiber according to the present invention, stretched and restored animal hair fibers and stretch-fixed animal hair fibers, two types of stretched and stretched animal hair fibers each having different characteristics can be produced. .

Therefore, if this method for producing stretched and stretched animal hair fibers is used, the stretched and stretched diameter of the animal hair fiber surface can be controlled relatively easily while suppressing glare on the surface of the animal hair fiber without increasing the complexity and size of the equipment and reducing the productivity. Animal hair fibers can be produced.

Note that the peripheral speed of the first downstream roller is set higher than the peripheral speed of the second upstream roller. For this reason, the swollen plasticized animal hair fiber bundle that flows from the second upstream roller toward the first downstream roller is stretched.

Further, the distance between the upstream nip portion and the downstream nip portion along the fiber flow (hereinafter referred to as “stretching span”) is preferably 60 mm or more and 300 mm or less, and more preferably 80 mm or more and 250 mm or less. When the distance between the upstream nip portion and the downstream nip portion along the fiber flow is within this range, the diameter of the rollers in the nip roller group can be made appropriate, and the single fiber can easily be prevented from being pulled out or unevenly drawn. Because it can. In addition, if the manufacturing method of this stretchable diameter animal hair fiber is used, the animal hair fiber can be stretched even if the stretch span is equal to or greater than the average length of the animal hair fiber, and the animal hair fiber It has been clarified by experiments of the present inventors that the animal hair fiber can be stretched even if the fiber is untwisted. For example, the average length of a general wool fiber is 60 mm to 100 mm. However, in the method for producing an extended stretchable animal hair fiber according to the present invention, the wool fiber is stably stretched even if the stretch span is set to 200 mm. We were able to. Normally, when a wool fiber bundle having an average length of 60 mm is to be drawn, if the drawing span is 200 mm, a state in which individual single fibers in the wool fiber bundle are not gripped in any of the nip portions will occur. . However, in this method for producing an elongated stretchable animal hair fiber, the wool fiber bundle before stretching contains a swelling plasticizer and becomes soft and adheres closely to the outer peripheral surfaces of the second upstream roller and the first downstream roller. For this reason, even if the drawing span is equal to or greater than the average length of animal hair fibers, there is little occurrence of drafts (relative displacement between fibers), such as a single fiber bundle in which single fibers are continuously connected. It is inferred that the animal hair fibers are uniformly stretched.

Further, the length of the stretching zone is preferably in the range of 5 mm to 50 mm, more preferably in the range of 5 mm to 30 mm, and still more preferably in the range of 10 mm to 30 mm.

Incidentally, most of the stretching of the swollen plasticized animal hair fibers is substantially performed in the stretching zone. By the way, the inventors of the present invention apply marks at equal intervals in the longitudinal direction of the swollen plasticized animal hair fiber bundle, supply the swollen plasticized animal hair fiber bundle to the above-described manufacturing apparatus, and perform stretching. It was confirmed that this was done in the stretching zone.

That is, by instantly stretching the swollen plasticized animal hair fibers at a short distance in the drawing zone, the swollen plasticized animal hair fibers can be uniformly drawn, and even if the short animal hair fibers are long, It can be stretched in the same way as hair fibers. When the distance of the drawing zone is within this range, the manufacturing apparatus can be made compact and the single fiber can be prevented from coming off.

Further, in this method for producing an elongated stretchable animal hair fiber, it is preferable that the swollen plasticized animal hair fiber bundle is stretched at a magnification of 1.1 to 3.0 times. When the swollen plasticized animal hair fiber bundle is drawn at such a draw ratio, it is 18.7 μm (display name SUPER100), which is necessary for the production of thin, lightweight, comfortable clothes and high-grade clothing, This is because animal hair fibers having a fiber diameter of 13 to 17 μm with an extremely small amount of hair production can be stably supplied at low cost.

Further, in this method of producing an elongated stretched animal hair fiber, it is preferable that the swollen plasticized animal hair fiber bundle is stretched only by the upstream nip roller pair and the downstream nip roller pair. When a swollen plasticized animal hair fiber bundle is stretched with only the upstream nip roller pair and the downstream nip roller pair, it is stretched in a short time with a short stretch span, thus preventing the occurrence of fiber breakage, fiber slippage, and uneven stretching. Because it can be done.

Further, in this method for producing an elongated stretchable animal hair fiber, the animal hair fiber bundle and the swollen plasticized animal hair fiber bundle are preferably untwisted.

By the way, in the conventional animal hair fiber drawing method, the animal hair fiber bundle is pre-twisted, or the animal hair fiber bundle is drawn and fixed while being twisted. The animal hair fiber bundles are twisted in this way. If the animal hair fiber bundles are not twisted, the single fibers will come loose, and the fibers will wind around the multi-stage drawing roller, causing problems in the process. This is because there is a tendency that a single fiber that is not stretched is mixed with the stretched fiber and the quality of the animal fiber with a long stretched diameter is deteriorated. On the other hand, as described above, in the method for producing an elongated stretchable animal hair fiber according to the present invention, an untwisted animal hair fiber bundle can be directly stretched. This eliminates the need for twisting and untwisting of the animal hair fiber bundle as in the conventional animal hair fiber drawing method, and can reduce the production cost of the stretchable animal hair fiber. In addition, as described above, in the conventional animal hair fiber drawing method, since the swollen plasticized animal hair fiber bundle is drawn in a twisted state, local uneven deformation is caused in the single fiber in the animal hair fiber bundle. It was happening. As a result, glare due to the reflection of light occurred in the obtained stretchable animal hair fiber. On the other hand, as described above, in the method for producing an elongated stretchable animal hair fiber according to the present invention, an untwisted animal hair fiber bundle can be directly stretched. For this reason, in this method for producing an elongated stretchable animal hair fiber, a stretched animal hair fiber having a mild appearance with suppressed glare can be provided. Further, in such a case, the manufacturing facility can be reduced in size and the handling of the manufacturing facility can be simplified, so that the workability can be improved and the investment cost can be suppressed.

Moreover, it is preferable that the manufacturing apparatus of this extended stretchable animal hair fiber has a heating apparatus and an oxidation neutralization apparatus. Then, in this method for producing an elongated stretched animal hair fiber, after the swollen plasticized animal hair fiber bundle is stretched, the swollen plasticized animal hair fiber bundle is stretched by a heating device in a state where the swollen plasticized animal hair fiber bundle is kept in tension. The hair fiber bundle is heated to a temperature in the range of 60 ° C. to 150 ° C. to fix the swollen plasticized animal hair fiber in the swollen plasticized animal hair fiber bundle, and the swollen plasticized animal using an oxidation neutralizer. The hair fibers are neutralized after being oxidized. The term “immobilization” as used herein refers to fixing a swollen plasticized animal hair fiber bundle that has been stretched at a predetermined magnification in the length direction to a stretched shape (maintaining the stretched shape), Means to manufacture. In other words, the shape of the stretch-immobilized animal hair fiber is not substantially lost by subsequent spinning, dyeing, arranging process, or handling and processing after processing as clothing. Moreover, it does not specifically limit as a heating apparatus, For example, a steam supply apparatus, a heating press apparatus, a heating drum apparatus etc. are mentioned. The heating method of the heating device is not particularly limited, and examples thereof include an electric heating method, a high-frequency heating method, a high-temperature oil, a circulating heating method such as steam and hot air, and the like.
When the immobilization temperature is within the above-described temperature range, the shape of the extended stretchable animal hair fiber can be permanently immobilized stably.

In addition, it is preferable that the apparatus for producing an elongated stretchable animal hair fiber further has a heating roller. And in this manufacturing method of an extended stretchable animal hair fiber, it is preferable that a heating apparatus heats a heating roller, and a swelling plasticization animal hair fiber bundle is directly contacted and fixed to the outer surface of a heating roller.

For this reason, in this method for producing stretched diameter animal hair fibers, it is possible to perform a permanent fixing process with a simple facility in a short time. In addition, since large-scale equipment such as a high-pressure steam chamber is not required, the capital investment cost can be reduced and the safety of work can be improved.

Further, in this method for producing an elongated stretched animal hair fiber, it is preferable that the swollen plasticized animal hair fiber bundle is fixed while being pressed by a heating roller and at least one pressure roller.

In this method for producing an extended stretchable animal hair fiber, the stretched stretchable animal hair fiber bundle can be fixed in a wet state (as if it is similar to a condition heated by steam).

Further, in this method for producing an elongated stretched animal hair fiber, the swollen plasticized animal hair fiber bundle preferably contains 60% by weight or more of the swollen plasticizer, and contains 70% by weight or more of the swollen plasticizer. Is more preferable. This is because, when the water content of the swollen plasticized animal hair fiber bundle is low, the glass transition temperature of the protein constituting the animal hair fiber becomes high, and the fixation of the animal fiber with a stretched diameter by heating becomes unstable. The content of the swelling plasticizer in the swollen plasticized animal fiber bundle is determined based on the experimental results under predetermined conditions such as the temperature of the heating roller, the fixing speed, and the amount of the drawn animal fiber bundle introduced. It is preferable to do.

Then, a stretched restored animal hair spun yarn can be produced from the stretched and stretched animal hair fiber obtained by the above-described method of producing a stretched and stretched animal hair fiber. In order to restore the stretched restored animal hair spun yarn to the original hair state, the stretched restored animal hair spun yarn may be immersed in warm water of 80 to 100 degrees C. In such a case, the stretched restored animal hair spun yarn may be boiled. In addition, a stretch-restored composite animal hair spun yarn can also be produced by combining the same stretched diameter animal hair fiber and other fibers. In addition, as “fibers other than the stretched and contracted diameter animal hair fibers”, for example, unstretched animal hair fibers and synthetic fibers are preferable. The stretched and restored composite animal hair spun yarn can provide a spun yarn having a new shape and design by stretching and restoring the stretched diameter animal hair fiber.

Also, a restored animal hair spun yarn can be produced by substantially restoring the above-described stretched restored animal hair spun yarn or stretched restored composite animal hair spun yarn to the fiber shape before stretching. Moreover, a fabric can be manufactured using such a restored animal hair spun yarn. Such a restored animal hair spun yarn and fabric can improve the bulkiness and the covering ratio of the spun yarn of the core-sheath structure, and thus can provide a new spun yarn and fabric. .

Further, after the above-described stretched restored animal hair spun yarn or stretched restored composite animal hair spun yarn is processed into a fabric, the stretched restored animal hair spun yarn or stretched restored composite animal hair spun yarn is substantially restored to the fiber shape before stretching. A restored animal blanket fabric can be produced. That is, a knitted fabric that cannot be knitted with the current knitting machine can be manufactured by boiling a knitted fabric knitted with the maximum cover factor and restoring it to a substantially raw hair state after knitting.

In addition, in the extended stretchable animal hair fiber bundle obtained by the above-described method for producing stretchable animal hair fibers, the single fiber having a circular cross-sectional shape in the radial direction in at least a part of the longitudinal direction, and the cross-sectional shape in the radial direction are It is preferable that non-circular single fibers are mixed. This is because glare on the fiber surface can be prevented. The average fiber diameter of the single fiber is preferably in the range of 13 μm to 28 μm, more preferably in the range of 13 μm to 25 μm, and still more preferably in the range of 13 μm to 22 μm. . This is because, as described above, the production of small animal hair fibers is small, and the animal hair fibers having the diameter as described above can be stably supplied in the present situation accompanied by a rise in price.

In addition, the same stretchable animal hair fiber bundle can be mixed with other animal hair fiber bundles such that such a stretchable animal hair fiber bundle becomes a main component. In this way, it is possible to create spun yarns and fabrics (woven fabrics, knitted fabrics, felts, etc.) having new characteristics that could not be produced in the textile industry so far.

Further, a stretched fixed animal hair fiber spun yarn can be produced from the above-mentioned stretched and contracted animal hair fiber bundle or mixed animal hair fiber bundle. Moreover, a fabric can be manufactured using such stretched fixed animal hair fiber spun yarn. Such a fabric can stably supply a clothing product having a texture and feel equivalent to that of natural animal hair fibers with a small amount of natural hair production, regardless of the price of the raw hair.

If the method for producing stretched diameter animal hair fibers according to the present invention is used, the stretch and shrinkage of the animal hair fiber surface is suppressed relatively easily and without increasing the complexity and size of the equipment and reducing the productivity. Diameter animal hair fibers can be produced.

It is a typical schematic diagram of a manufacturing device of an extended expansion diameter animal hair fiber concerning an embodiment of the invention. It is a typical schematic diagram showing the composition of the extending mechanism concerning an embodiment of the invention. It is a photograph which shows an example of the extending | stretching state of the extended expansion-diameter animal hair fiber which concerns on embodiment of this invention. It is an electron micrograph of the heating roller non-contact side surface of the extended stretch diameter animal hair fiber which concerns on embodiment of this invention. It is an electron micrograph of the heating roller contact side surface of the back surface of the extended stretch diameter animal hair fiber which concerns on embodiment of this invention. It is an electron micrograph of the cross section of the circumference direction of the extended expansion-diameter animal hair fiber which concerns on embodiment of this invention. It is a fiber diameter distribution graph of the extended expansion-diameter animal hair fiber manufactured in Example 1 of this invention. It is a fiber diameter distribution graph of the extended stretchable animal hair fiber manufactured in Example 3 of this invention. It is an electron micrograph of the knitted fabric knitted by the stretch restored wool spun yarn manufactured in Example 6 of this invention. It is an electron micrograph after carrying out the boiling process of the knitted fabric knitted by the stretch | restoration restoration | reconstruction wool spun yarn manufactured in Example 6 of this invention. It is a typical schematic diagram showing the composition of the extending mechanism concerning modification (C).

The stretched and restored animal hair fiber according to the embodiment of the present invention is mainly manufactured through a swelling plasticization process, a stretching process, a water washing process, and a drying process. In addition, the stretch-immobilized animal hair fiber according to the embodiment of the present invention is mainly manufactured through a swelling plasticization process, a stretching process, a fixing process, an oxidation neutralization / water washing process, and a drying process. Specifically, both the stretch-restored animal hair fibers and the stretch-immobilized animal hair fibers are manufactured using the animal hair fiber-stretching and fixing device 100 shown in FIG. In FIG. 1, arrows A, B, and C indicate the flow direction of the animal hair fiber bundle in the animal hair fiber drawing and fixing device 100.

The stretch restored animal hair fiber is a stretch-stretched animal hair fiber that can temporarily retain the stretched shape and restore it to the state of substantially raw hair before stretching as required. Further, the stretch-immobilized animal hair fiber is an elongated stretch-diameter animal hair fiber that can keep the stretched shape permanently.

Hereinafter, each process described above will be described in detail with reference to each device in the animal hair fiber drawing and fixing device 100.

<Manufacture of stretched restored animal hair fiber and stretch-fixed animal hair fiber>
(1) Swelling Plasticization Step In the swelling plasticization step, as shown in FIG. 1, the untwisted animal hair fiber bundle 1 is continuously guided to the swelling plasticizing device 30 and subjected to the swelling plasticizing treatment. As this swelling plasticization treatment, a conventional technique can be applied.

In addition, although the typical thing of the animal hair fiber which can be applied to the present invention is wool, cashmere, mohair, camel, angora, etc. can also be applied to the present invention. As these animal hair fiber bundles 1, untwisted animal hair fiber bundles (top sliver) in which a plurality of single fibers are preliminarily arranged can be used. Such animal hair fiber bundles are generally commercially available. Moreover, it is preferable that the average length of animal hair fiber is 20 mm or more, and it is more preferable that it is 30 mm or more.

As shown in FIG. 1, the swelling plasticization processing apparatus 30 mainly includes a swelling plasticization tank 4 and a plurality of guide rollers 3. The swelling plasticization tank 4 is filled with the swelling plasticizing aqueous solution 2 as shown in FIG. The guide roller 3 is disposed inside the swelling plasticization tank 4, and guides the untwisted animal hair fiber bundle 1 into the swelling plasticization tank 4 and immerses it in the swelling plasticization aqueous solution 2.

Examples of the swollen plasticized aqueous solution 2 include an aqueous solution in which an additive is dissolved in water. In addition, the swelling plasticization aqueous solution 2 may be what has been used conventionally. Examples of the additive include a surfactant, a hydrogen bond cleaving agent, a crosslink bond cleaving agent, and a hydrophobic bond relaxing agent. Examples of the surfactant include an alkylphenyl ether type activator. In addition, as the crosslinker cleaving agent, disulfide bond cleaving agents, for example, sulfur-containing amino acids such as thiol compounds (thioglycolic acid, mercaptopropionic acid, thioglycerin, L-cystine, etc.), alkyl mercaptans, mercapto alcohols, mercaptoamines, etc. And reducing agents such as sodium sulfite, sodium bisulfite, monoethanolamine sulfite, and monoethanolamine bisulfite.

Note that the additives are not limited to those described above. Moreover, you may mix and use an additive. The amount of additive added to water varies depending on the type of additive used and the purpose of use, so it cannot be said unconditionally, but when using a surfactant or the like for the purpose of enhancing the penetration effect into the fiber, 10 g / L or less is appropriate. In addition, when the cross-linking cleavage agent is a symmetric reducing agent, thioglycolic acid, mercaptoethanol or the like, the addition amount is preferably in the range of 0.05% by weight to 10% by weight. More preferably, it is in the range of not less than 8% and not more than 8 wt%.

Further, the temperature during the swelling plasticization treatment is not particularly limited, but is preferably in the range of 30 ° C. or more and 80 ° C. or less. The pH of the swollen plasticized aqueous solution 2 is preferably in the range of 7 or more and 10 or less (in the range of weak alkalinity to medium alkalinity). The treatment time during the swelling plasticization treatment may be a time when the swelling plasticization aqueous solution 2 penetrates into the interior of the animal hair fibers sufficiently uniformly and the animal hair fibers are sufficiently swollen. The manufacturing conditions described above may be set in consideration of the manufacturing cost, the stability of the quality of the obtained stretch-stretched animal hair fiber, and the like.

(2) Stretching step In the stretching step, as shown in FIG. 1 and FIG. 2, an animal hair fiber bundle (hereinafter referred to as a “swelled plasticized animal hair fiber bundle”) that has undergone swelling plasticization in the swelling plasticizing apparatus 30. 5 is stretched in the stretching mechanism 40.

As shown in FIGS. 1 and 2, the drawing mechanism 40 mainly includes a back roller pair 10 and a front roller pair 20, and is disposed on the downstream side in the fiber flow direction of the swelling plasticizing apparatus 30. Yes. As shown in FIGS. 1 and 2, the back roller pair 10 mainly includes a top roller (hereinafter referred to as “back top roller”) 11 and a bottom roller (hereinafter referred to as “back bottom roller”) 12. The front roller pair 20 is disposed upstream of the fiber flow direction. The back top roller 11 and the back bottom roller 12 are disposed so as to contact each other, and a nip portion 10N is formed at the contact portion. The front roller pair 20 is mainly composed of a top roller (hereinafter referred to as “front top roller”) 21 and a bottom roller (hereinafter referred to as “front bottom roller”) 22 as shown in FIGS. It is arranged downstream of the back roller pair 10 in the fiber flow direction. The front top roller 21 and the front bottom roller 22 are disposed so as to contact each other, and a nip portion 20N is formed at the contact portion.

In addition, it is preferable that the back bottom roller 12 and the front bottom roller 22 are metallic. Moreover, it is preferable that the surface structure of these bottom rollers 12 and 22 is a fluid structure. The back top roller 11 and the front top roller 21 are preferably rubber-covered rollers. This is because the gripping force of the swollen plasticized animal hair fiber bundle 5 at each of the nip portions 10N and 20N can be made uniform. In addition, the fluidized structure and the rubber hardness are “the gripping force of the swollen plasticized animal hair fiber bundle 5 at the nip portions 10N and 20N” and “the swollen plasticized animal hair fiber bundle 5 at the nip portions 10N and 20N” The damage to the swollen plasticized animal hair fiber bundle 5 may be optimized after examining the experimental results. From the actual experimental results, the diameters of the back top roller 11, the back bottom roller 12, the front top roller 21, and the front bottom roller 22 are preferably in the range of 15 mm to 45 mm. Further, the diameters of the back bottom roller 12 and the front top roller 21 may be the same or different.

Further, in the stretching mechanism 40 according to the present embodiment, when viewed along the rotation axes of the rollers 11, 12, 21, and 22, that is, when viewed from the side, the rotation shaft of the back top roller 11 and the front bottom roller 22. And the virtual straight line connecting the rotation axis of the back bottom roller 12 and the rotation axis of the front top roller 21 intersect, and the rotation axis of the back top roller 11 and the back bottom roller 12 The back roller pair 10 and the front roller pair 20 are arranged so that a virtual straight line connecting the rotation shaft and a virtual straight line connecting the rotation shaft of the front top roller 21 and the rotation shaft of the front bottom roller 22 are parallel to each other. ing. Further, as shown in FIGS. 1 and 2, the back roller pair 10 and the front roller pair 20 include a virtual straight line connecting the rotation axis of the back top roller 11 and the rotation axis of the back bottom roller 12, and the front top roller. An imaginary straight line connecting the rotation axis of 21 and the rotation axis of the front bottom roller 22 is disposed so as to be inclined by a predetermined angle D from the upstream side in the fiber flow direction toward the downstream side in the fiber flow direction. With this arrangement, the distance of the imaginary straight line connecting the rotation axis of the back bottom roller 12 and the rotation axis of the front top roller 21 is the imaginary straight line connecting the rotation axis of the back top roller 11 and the rotation axis of the front bottom roller 22. It is shorter than the distance (see FIGS. 1 and 2). That is, the distance between the back bottom roller 12 and the front top roller 21 is shorter than the distance between the back top roller 11 and the front bottom roller 22.

Then, the peripheral speed of the front roller pair 20 (peripheral speed of the top roller 21 of the front roller pair 20) is increased at a predetermined magnification with respect to the peripheral speed of the back roller pair 10 (peripheral speed of the bottom roller 12 of the back roller pair 10). Thus, the swollen plasticized animal hair fiber bundle 5 can be stretched at a desired magnification. In the embodiment of the present invention, the swollen plasticized animal hair fiber bundle 5 is stretched (stretched in the length direction) at a magnification in the range of 1.1 to 2.0 times. When the animal hair fiber is wool, the average fiber diameter is 13 μm to 38 μm. In order to obtain wool fibers of 13 μm to 28 μm from such raw wool, it is preferable to stretch at a magnification of 1.1 to 2.0 times, and to stretch at a magnification of 1.2 to 1.8 times. Is more preferable. In the present embodiment, the draw ratio is calculated from the following formula (1).

Magnification = S ₀ / S ₁ (1)
S ₁ : Average cross-sectional area of animal hair fibers after stretching (mm ² )
S ₀ : Average cross-sectional area of animal hair fibers before stretching (mm ² )

Hereinafter, the stretching process of the swollen plasticized animal hair fiber bundle 5 in the stretching mechanism 40 will be described in detail.
The swollen plasticized animal hair fiber bundle 5 is guided from the swollen plasticizing apparatus 30 to the drawing mechanism 40 via the guide roller 6. In the stretching mechanism 40, as shown in FIGS. 1 and 2, the swollen plasticized animal hair fiber bundle 5 is stretched in the order of the back top roller 11, the back bottom roller 12, the front top roller 21, and the front bottom roller 22. It is. At this time, when the drawing mechanism 40 is viewed from the side, the shape of the swollen plasticized animal hair fiber bundle 5 from the back top roller 11 to the back bottom roller 12 becomes an inverted S-shape, and the swelling from the nip portion 10N to the nip portion 20N. The shape of the plasticized animal hair fiber bundle 5 is S-shaped, and the shape of the swollen plasticized animal hair fiber bundle 5 from the front top roller 21 to the front bottom roller 22 is inverted S-shaped. At this time, the swollen plasticized animal hair fiber bundle 5 is gripped at two locations, that is, the nip portion 10N of the back roller pair 10 and the nip portion 20N of the front roller pair 20, as shown in FIGS. It will be. That is, in this animal hair fiber drawing and fixing device 100, the swelling plasticized animal hair fiber bundle 5 is substantially drawn by the back bottom roller 12 and the front top roller 21 (see FIGS. 1 and 2). Hereinafter, the region from the nip portion 10N to the nip portion 20N is referred to as “stretched span”, and “swelled plasticized animal hair fiber bundle 5 from the point that the swollen plasticized animal hair fiber bundle 5 is separated from the back bottom roller 12”. The region 10 up to “the first point of contact with the front top roller 21” is referred to as “stretching zone”.

As described above, the back roller pair 10 and the front roller pair 20 include a virtual straight line connecting the rotation axis of the back top roller 11 and the rotation axis of the back bottom roller 12, and the rotation axis of the front top roller 21 and the front roller. An imaginary straight line connecting the rotation axis of the bottom roller 22 is arranged so as to be inclined by a predetermined angle D from the upstream side in the fiber flow direction toward the downstream side in the fiber flow direction. This is because the stretched span is longer than the average length of the single fibers, and the swollen plasticized animal hair fiber bundle 5 is brought into contact with the outer peripheral surfaces of the back bottom roller 12 and the front top roller 21 as long as possible. That is, in this drawing mechanism 40, the tensile tension on the swollen plasticized animal hair fiber bundle 5 in the drawing zone can be received on the contact surface of the back bottom roller 12 and the front top roller 21 with the swollen plasticized animal hair fiber bundle 5. It is important to do so.

In the present embodiment, the length of the stretched span is preferably in the range of 60 mm or more and 300 mm or less, and more preferably in the range of 80 mm or more and 200 mm or more. This is because, when the length of the stretched span is within this range, it is possible to effectively prevent the short fibers from dropping and uneven stretching.

Further, in order to prevent slipping or fiber breakage of the swollen plasticized animal hair fiber bundle 5 in the stretched span, a pressure of 0.1 kg / cm ² to 3.0 kg / cm ² is applied to each nip portion 10N, 20N. Is preferred.

The length of the stretching zone 19 is not particularly limited, and is determined in consideration of work efficiency and quality stability, but is generally preferably in the range of 5 mm to 50 mm, preferably 5 mm or more. It is more preferably within a range of 30 mm or less, and further preferably within a range of 10 mm or more and 30 mm or less. Further, it is preferable that only one stretching zone 19 is provided in the stretching mechanism 40. This is because it is possible to produce stretch-restored animal hair fibers and stretch-immobilized animal hair fibers of stable quality. Further, in this stretching zone 19, stretching of 80 to 90% is performed. This is apparent from the photograph of FIG. In FIG. 3, a location indicated by reference numeral 91 is a location corresponding to the nip portion 10 </ b> N of the back roller pair 10, and a location indicated by reference numeral 94 is a location corresponding to the nip portion 20 </ b> N of the front roller pair 20. Further, a location indicated by reference numeral 92 is a location corresponding to the starting point of the stretching zone 19 (point on the back bottom roller 12 side), and a location indicated by reference numeral 93 is the end point of the stretching zone 19 (point on the front top roller 21 side). ).

(3) Water washing process As above-mentioned, in the animal hair fiber extending | stretching fixing device 100, when an extending | stretching restoration animal hair fiber is manufactured, the water washing process has refrained after the extending process. That is, in the water washing step, the swollen plasticized animal hair fiber bundle 5 after drawing is washed with water. Specifically, in this washing step, the swollen plasticized animal hair fiber bundle (hereinafter referred to as “stretched swollen plasticized animal hair fiber bundle”) 14 after drawing is guided to a pair of washing rollers 24 and 25 having a washing mechanism, Wash with water by the pair of cleaning rollers 24 and 25. In this washing step, a tension of about 1.01 to 1.03 times is applied to the stretched and swollen plasticized animal hair fiber bundle 14.

(4) Drying step As described above, in the animal hair fiber stretching and fixing device 100, when stretched and restored animal hair fibers are produced, the drying step is refrained after the water washing step. That is, in the drying step, the stretched and swollen plasticized animal hair fiber bundle 14 after washing with water is dried. Specifically, in this drying step, the stretched and swollen plasticized animal hair fiber bundle 14 after washing with water is brought into contact with a heating roller 15 set at a temperature of 50 ° C. or less to be primarily dried, and then further stretched. The swollen plasticized animal hair fiber bundle 14 is sent to the drying device 80 on the downstream side in the fiber flow direction, and is secondarily dried by the drying device 80. Even in this drying step, a tension of about 1.01 to 1.03 times is applied to the stretched and swollen plasticized animal hair fiber bundle 14.

(5) Immobilization process As described above, in the animal hair fiber stretching and fixing device 100, when stretched and immobilized animal hair fibers are produced, the immobilization process is reserved after the stretching process. That is, in the fixing step, the shape of the stretched and swollen plasticized animal hair fiber in the stretched and swollen plasticized animal hair fiber bundle 14 is fixed. Specifically, in this fixing step, the stretched and swollen plasticized animal hair fiber bundle 14 is guided from the front bottom roller 22 to the pair of cleaning rollers 24 and 25 (in this fixing step, the stretched and swollen plasticized material is used. The animal hair fiber bundle 14 is not washed with water but only passes through the pair of washing rollers 24 and 25), and is directly brought into contact with the heating roller 15 having a smooth outer peripheral surface to fix the shape of the stretch-swelled plasticized animal hair fiber. To do. In the present embodiment, as shown in FIG. 1, a plurality of pressure rollers 16 are pressed against the heating roller 15. The pressure roller 16 serves to press the stretched and swollen plasticized animal hair fiber bundle 14 against the heating roller 15. For this reason, at least a part of the longitudinal direction of the stretch-immobilized animal hair fiber is deformed into an elliptical cross-sectional shape. Due to this deformation, glare of the stretch-immobilized animal hair fibers is suppressed, and as a result, a mellow gloss is imparted to the stretch-immobilized animal hair fibers.

In addition, in FIG.4, FIG.5 and FIG.6, the microscope picture of an extending | stretching fixed wool fiber is shown. FIG. 4 is a photomicrograph of stretch-fixed wool fibers on the side not in contact with the heating roller 15. It can be seen from the micrograph of FIG. 4 that the wool fibers are stretched at equal intervals along the scale. In addition, the cross section of the stretch-fixed wool fiber on the side not in contact with the heating roller 15 has a circular shape like the raw wool. Next, FIG. 5 is an electron micrograph of the stretch-fixed wool fiber on the side in contact with the heating roller 15. In the figure, a part of the stretch-immobilized wool fiber is deformed from a circular shape to a semicircular shape (see reference numeral 27 in FIG. 5). In addition, since this deformation | transformation part reflects light irregularly in the extending | stretching fixed wool fiber bundle, it is thought that a mellow color tone arises in an extending | stretching fixed wool fiber bundle. FIG. 6 is a photomicrograph of the cross section of the stretch-immobilized wool fiber. In this figure, it can be seen that a partial cross section of the stretch-immobilized wool fiber is deformed from a circular shape to an elliptical shape.

In this fixing step, a tension of about 1.01 to 1.03 times is applied to the stretched and swollen plasticized animal hair fiber bundle 14 (the portion from the front bottom roller 22 to the separation roller pair 17). Yes.

The temperature of the heating roller 15 is preferably set to a temperature within a range of 60 ° C. to 150 ° C., and more preferably set to a temperature within a range of 70 ° C. to 120 ° C. preferable. This is because when the temperature of the heating roller 15 falls within the above range, the stretched and swollen plasticized animal hair fibers can be stably and uniformly fixed. Further, as the heat source of the heating roller 15, for example, an electric heater, a high-frequency heating source, or a circulating fluid (such as hot liquid or hot air) is preferably used. Moreover, it is preferable that the outer peripheral surface of the heating roller 15 is coated with a fluorine resin, a silicone resin, or the like. This is because the releasability of the stretched and swollen plasticized animal hair fiber bundle 14 can be improved.

Further, the diameter and number of the pressure rollers 16 are not particularly limited. Specifically, it is preferable that pressure rollers having a diameter of 30 mm to 50 mm are installed around the heating roller 15 at intervals of 50 mm to 100 mm. Moreover, it is preferable that the pressure roller 16 presses both end shaft portions thereof toward both end shafts of the heating roller 15. Further, the pressure applied by the pressure roller 16 to the heating roller 15 is preferably adjusted by an air cylinder, a spring or the like. The pressure roller 16 is preferably a driven roller that rotates as the heating roller 15 rotates. The pressure roller 16 is preferably covered with an elastic body such as silicone rubber. In such a case, the hardness of the elastic body is preferably in the range of 30 degrees to 80 degrees, and more preferably in the range of 40 degrees to 60 degrees. The elastic body may be a sponge. Further, in a state where the pressure roller 16 is pressed against the heating roller 15, the pressure applied to the heating roller 15 is such that evaporation of the swelling plasticizer and fixation of the stretched and swollen plasticized animal hair fibers are performed in a steam atmosphere. The conditions such as the pressure of the roller 16, the hardness of the elastic body of the pressure roller 16, the fixing temperature, the rotation speed of the heating roller 15 and the pressure roller 16 are preferably set.

(6) Oxidation Neutralization / Washing Process As described above, in the animal hair fiber stretching / fixing device 100, when stretched / immobilized animal hair fibers are produced, the oxidation neutralization / water washing process is refrained after the immobilization process. That is, in the oxidation neutralization / water washing step, the stretched and swollen plasticized animal hair fiber bundle (hereinafter referred to as “stretched and immobilized animal hair fiber bundle”) 18 after fixation is subjected to oxidation neutralization and water washing. Specifically, in this oxidation neutralization / water washing step, the stretch-immobilized animal hair fiber bundle 18 is separated from the heating roller 15 via the separation roller pair 17, and is separated into the oxidation neutralization treatment tank 60 and the water washing treatment tank 70. Guide in order to neutralize and wash with water. In this oxidation neutralization / water washing step, a tension of about 1.01 to 1.03 times is applied to the stretch-immobilized animal hair fiber bundle 18.

In the present embodiment, as described above, since the stretch-swelled plasticized animal hair fibers are fixed by heat treatment, it is not necessary to regenerate the cross-linking of the animal hair fibers by the action of the oxidizing agent. However, when a basic drug is used as the swelling plasticizing aqueous solution 2 in the swelling plasticization step, it is preferable to provide this step as a neutralization treatment. This is because yellowing and deterioration of physical properties of the stretch-immobilized animal hair fibers can be prevented. In the oxidative neutralization step, general-purpose oxidizing agents such as hydrogen peroxide, formic acid, acetic acid, hydrochloric acid, and sulfuric acid can be used.

(7) Drying step As described above, in the animal hair fiber stretching and fixing device 100, when stretched and immobilized animal hair fibers are produced, the drying step is refrained after the oxidation neutralization / water washing step. That is, in the drying step, the stretch-immobilized animal hair fiber bundle 18 after oxidative neutralization is dried. Specifically, in this drying step, the stretch-immobilized animal hair fiber bundle 18 after the oxidation neutralization is guided to the drying device 80 and dried. Even in this drying step, a tension of about 1.01 to 1.03 times is applied to the stretch-immobilized animal hair fiber bundle 18.

<Features of animal hair fiber drawing and fixing apparatus and animal hair fiber drawing and fixing method>
(1)
In the animal hair fiber drawing and fixing method according to the present embodiment, some single fibers are deformed into a semicircular shape or an elliptical shape by drawing or fixing, but irregular irregular shapes are formed on the fiber surface as in the prior art. It does not occur. For this reason, if this animal hair fiber extending | stretching fixing method is utilized, the extending | stretching decompression | restoration animal fiber or extending | stretching fixed animal hair fiber which gave mild luster can be manufactured.

(2)
In the animal hair fiber drawing and fixing method according to the present embodiment, the swollen plasticized animal hair fiber bundle 5 is looped over the outer peripheral surfaces of the back bottom roller 12 and the front top roller 21, and as a result, the back bottom roller 12 and the swollen plasticized animal hair fiber bundle 5 are in close contact with the outer peripheral surface of the front top roller 21 for a long time. For this reason, in the extending | stretching mechanism 40 which concerns on this Embodiment, even if the pressure applied to nip part 10N and 20N is low, the swelling plasticization animal hair fiber bundle 5 can fully be hold | gripped. For this reason, if this animal hair fiber drawing and fixing method is used, it will not cause excessive stress or damage to the swollen plasticized animal hair fiber bundle 5, and it will prevent slipping, thread dropping or animal hair fiber cutting, etc. Can do.

(3)
In the animal hair fiber drawing and fixing method according to this embodiment, the swollen plasticized animal hair fiber bundle 5 in a wet state is brought into direct contact with the surface of the heating roller 15 in the fixing process. For this reason, at the initial stage when the swollen plasticized animal hair fiber bundle 5 comes into contact with the heating roller 15, it is contained in the swollen plasticized animal hair fiber bundle 5 as the temperature of the swollen plasticized animal hair fiber bundle 5 increases. The temperature of the swollen plasticizer is also increased, and steam is generated around the swollen plasticized animal hair fiber bundle 5 to create an environment in which the swollen plasticized animal hair fiber bundle 5 is heated in the steam. it can. For this reason, when this animal hair fiber drawing and fixing method is used, the immobilization of the swollen plasticized animal hair fibers can be realized in a short time without using complicated equipment such as a steam chamber in the immobilization process. .

<Modification>
(A)
In the animal fiber drawing and fixing device 100 according to the previous embodiment, when the drawing mechanism 40 is viewed from the side, a virtual straight line connecting the rotation axis of the back top roller 11 and the rotation axis of the front bottom roller 22, and the back bottom roller A virtual straight line connecting the 12 rotation axes and the rotation axis of the front top roller 21 intersects, and a virtual straight line connecting the rotation axis of the back top roller 11 and the rotation axis of the back bottom roller 12 and the front top roller 21. The back roller pair 10 and the front roller pair 20 are arranged so that the imaginary straight line connecting the rotation axis of the front bottom roller 22 and the rotation axis of the front bottom roller 22 is parallel, but the back roller pair 10 and the front roller pair 20 are arranged. Is a virtual straight line connecting the rotation axis of the back top roller 11 and the rotation axis of the front bottom roller 22, and the back bottom roller 1 The virtual straight line connecting the rotation axis of the front top roller 21 and the rotation axis of the front top roller 21 intersects, and the virtual extension straight line connecting the rotation axis of the back top roller 11 and the rotation axis of the back bottom roller 12 and the front top roller 21. And a virtual extension straight line connecting the rotation axis of the front bottom roller 22 and the rotation axis of the front bottom roller 22 may be arranged to intersect each other.

(B)
In the animal hair fiber drawing and fixing device 100 according to the previous embodiment, the cleaning roller pairs 24 and 25, the oxidation neutralization treatment tank 60, the water washing treatment tank 70, and the drying device 80 are incorporated. The animal hair fiber stretching and fixing device 100 may be provided separately. For example, these configurations may be incorporated in a dyeing machine or the like independent from the animal hair fiber drawing and fixing device 100.

(C)
In the animal fiber drawing and fixing device 100 according to the previous embodiment, when the drawing mechanism 40 is viewed from the side, a virtual straight line connecting the rotation axis of the back top roller 11 and the rotation axis of the front bottom roller 22, and the back bottom roller A virtual straight line connecting the 12 rotation axes and the rotation axis of the front top roller 21 intersects, and a virtual straight line connecting the rotation axis of the back top roller 11 and the rotation axis of the back bottom roller 12 and the front top roller 21. The back roller pair 10 and the front roller pair 20 are arranged so that the virtual straight line connecting the rotation axis of the front bottom roller 22 and the rotation axis of the front bottom roller 22 is parallel, but as shown in FIG. An imaginary straight line connecting the rotation axis of the top roller 111 and the rotation axis of the front bottom roller 122, and the rotation axis of the back bottom roller 112 and the freon. As the virtual straight line are in the same virtual straight line connecting the rotation axis of the top roller 121, roller pair 110 and the front roller pair 120 may be disposed.

Hereinafter, the present invention will be described in more detail with reference to examples. The present invention is not limited to these examples.

An untwisted wool fiber bundle (top sliver 23 g / m) containing wool fibers having an average fiber diameter of 22.50 μm and an average length of 95 mm was prepared. Next, an aqueous sodium hydroxide solution was added to thioglycolic acid (Sakai Chemical Co., Ltd.) to prepare a 3.9 wt% thioglycolic acid aqueous solution having a pH of 9.00. In this example, this aqueous thioglycolic acid solution was used as a swelling plasticizer.

The wool fiber bundle was stretched over the above-described animal fiber drawing and fixing device 100 as shown in FIG. Next, after the swelling plasticizer was put into the swelling plasticization tank 4, the swelling plasticizer was warmed to 40 degrees C. Thereafter, the wool fiber bundle was immersed in a swelling plasticizer for 40 minutes to perform a swelling plasticization treatment of the wool fiber bundle. Next, the swollen plasticized wool fiber bundle (hereinafter referred to as “swelled plasticized wool fiber bundle”) is drawn out from the swollen plasticizing tank 4 while containing the swollen plasticizer, and the swollen plasticized wool fiber bundle is drawn. Was stretched by the stretching mechanism 40 at a speed of 8.6 cm / min. The outer diameters of the top rollers 11 and 21 and the bottom rollers 12 and 22 of the back roller pair 10 and the front roller pair 20 were 25 mm. Further, a roller covered with a core metal with urethane rubber having a hardness of 50 degrees and a thickness of 7 mm was used as the top rollers 11 and 21, and a stainless steel core metal was used as the bottom rollers 12 and 22. Further, the peripheral speed of the back roller pair 10 was set to 8.6 cm / min, and the peripheral speed of the front roller pair 20 was set to 15.7 cm / min. That is, the draw ratio is 1.82 times (= 15.7 / 8.6).

Further, the back roller pair 10 and the front roller pair 20 are fibers with respect to the vertical axis so that the swollen plasticized wool fiber bundle comes into contact with about 3/5 of the outer periphery of the back bottom roller 12 and the front bottom roller 22 in a side view. It was inclined 45 degrees upstream in the flow direction (see FIG. 2 and the like). Furthermore, the length of the stretching zone was set to 14 mm. Then, after sequentially stretching the swollen plasticized wool fiber bundle by such a drawing mechanism 40, the swollen plasticized wool fiber bundle after stretching (hereinafter referred to as “stretched swollen plasticized wool fiber bundle”) is transferred from the front bottom roller 22. The drawn and swollen plasticized wool fibers in the drawn and swollen plasticized wool fiber bundle were fixed by being guided to the heating roller 15 through the cleaning roller pairs 24 and 25 and in direct contact with the heated roller 15. The fixing process was performed in a state where the peripheral speed of the heating roller 15 was 1.02 times the peripheral speed of the front roller pair 20, that is, the stretched and swollen plasticized wool fiber bundle was in tension. . The heating roller 15 was heated by a built-in electric heater so that the outer diameter was 210 mm and the surface temperature was 80 degrees C. The contact time of the stretched and swollen plasticized wool fiber bundle with the heating roller 15 was 110 seconds. As shown in FIG. 1, seven pressure rollers (silicone rubber-coated stainless steel rollers having a diameter of 27 mm) 16 were disposed on the outer periphery of the heating roller 15. Each pressure roller 16 was pressed against the heating roller 15 with a pressure of 1.5 kg / cm ² by an air cylinder. The wet ratio of the stretched and swollen plasticized wool fiber bundle before being brought into contact with the heating roller 15 was 81% by weight. At this time, the stretch span was 116 mm.

Subsequently, the fixed stretch-swelling plasticized wool fiber bundle (hereinafter referred to as “stretch-fixed wool fiber bundle”) is immersed in 1% by weight hydrogen peroxide water at 40 ° C. for 30 minutes to be oxidized, It was washed with water and further neutralized by immersion in 0.3% by weight of acetic acid for 30 minutes. The average fiber diameter of the stretch-immobilized wool fiber thus obtained was 19.39 μm (measured according to JIS L1081A method). That is, the single fiber of the wool fiber bundle after stretching and fixing is reduced in diameter by about 14% on average with respect to the single fiber of the wool fiber bundle before stretching and fixing. Further, this stretch-immobilized wool fiber bundle was boiled with boiling water for 15 minutes, and then the average fiber diameter of the stretch-immobilized wool fibers was measured again. The average fiber diameter of the stretch-immobilized wool fiber at this time was 19.25 μm. For this reason, it was confirmed that this stretch-immobilized wool fiber was completely immobilized. FIG. 7 shows the fiber diameter distribution of (i) the wool fiber bundle before stretching and fixing, (ii) the wool fiber bundle after stretching and (iii) the wool fiber bundle after boiling and fixing. Indicated. From FIG. 7, it can be seen that the fiber diameter distribution of the raw hair is slid in the fine count direction almost as it is due to the final stretching and fixing. That is, in the present drawing fixation, high-precision drawing is performed on the wool fiber bundle. Further, the stretch-fixed wool fiber bundle includes fibers having an elliptical cross section, and has a mellow appearance characteristic.

Also, after supplying the above-mentioned stretch-fixed wool fiber bundle to a spinning machine to produce a 70-stamp double-stretched-fixed wool spun yarn, a knitted fabric having a cover factor of 0.49 is manufactured from the stretch-fixed wool spun yarn. did. This knitted fabric had a soft, mild luster, a good touch and a supple texture.

Next, the above-described stretch-fixed wool fiber bundle and tetron filament (35 denier) were supplied to the spinning machine at a ratio of 80:20 to produce a 100-count double-stretch stretch-fixed wool spun yarn. Thereafter, a woven fabric was produced from the stretch-fixed woolen spun yarn. When the immersion dimensional change rate (JIS L 1096 C method), press dimensional change rate (JIS L 1096 H-2 method), and hygall expansion (based on the immersion C method) of the fabric were measured, the dimensional change rates shown in Table 1 were obtained. Obtained. That is, it had sufficient dimensional stability as a woven fabric.

Example 1 except that an untwisted wool fiber bundle (top sliver 22 g / m) having an average fiber diameter of 18.50 μm and an average length of 77 mm was used, and the peripheral speed of the front roller pair 20 was set to 17.2 cm / min. In the same manner, a stretch-fixed wool fiber bundle was produced. In addition, the draw ratio at this time is 2.0 times (= 17.2 / 8.6).

The average fiber diameter of the obtained stretch-immobilized wool fiber was 15.13 μm. In other words, the single fiber of the wool fiber bundle after stretching and fixing is reduced in diameter by about 18% on average with respect to the single fiber of the wool fiber bundle before stretching and fixing. Further, this stretch-immobilized wool fiber bundle was boiled with boiling water for 15 minutes, and then the average fiber diameter of the stretch-immobilized wool fibers was measured again. At this time, the average fiber diameter of the stretch-fixed wool fibers was 15.20 μm. For this reason, it was confirmed that this stretch-immobilized wool fiber was completely immobilized.

A stretch-fixed cashmere fiber bundle was produced in the same manner as in Example 1 except that an untwisted cashmere fiber bundle (top sliver 17 g / m) having an average fiber diameter of 17.0 μm and an average length of 53 mm was used.

The average fiber diameter of the obtained stretch-immobilized cashmere fiber was 14.13 μm. In other words, the single fiber of the cashmere fiber bundle after stretching and fixing is reduced in diameter by about 17% on average with respect to the single fiber of the cashmere fiber bundle before stretching and fixing. Further, this stretch-immobilized cashmere fiber bundle was boiled with boiling water for 15 minutes, and then the average fiber diameter of the stretch-immobilized cashmere fibers was measured again. At this time, the average fiber diameter of the stretch-immobilized cashmere fibers was 14.19 μm. For this reason, it was confirmed that this stretch-immobilized cashmere fiber was completely immobilized. FIG. 8 shows the fiber diameter distribution of (i) a cashmere fiber bundle before stretch fixation, (ii) a cashmere fiber bundle after stretch fixation, and (iii) a cashmere fiber bundle after boiling treatment after stretch fixation. Indicated. From FIG. 8, it can be seen that the fiber diameter distribution of the raw hair is slid in the fine count direction almost as it is due to the final stretching and fixing. That is, in the present drawing and fixing, the cashmere fiber bundle is drawn with high accuracy.

(I) After the swollen plasticized wool fiber bundle is sequentially stretched by the stretching mechanism 40, the stretched swollen plasticized wool fiber bundle is heated from the front bottom roller 22 through the cleaning roller pairs 24 and 25 to a heating roller having a surface temperature of 50 degrees C. 15 and directly contacting the heating roller 15 to dry the stretched and swollen plasticized wool fiber bundle, and (ii) the pressure roller 16 is set to 1.8 kg / cm ² with respect to the heating roller 15 by an air cylinder. (Iii) The stretched and swollen plasticized wool fiber bundle is directly guided to the drying device 80 without passing through the oxidation neutralization treatment tank 60 and the water washing treatment tank 70. A stretched and restored wool fiber bundle was produced in the same manner as in Example 1 except that the bundle was wind-dried at a temperature of 50 ° C. or less with a drying device 80 and wound. The stretched and swollen plasticized wool fiber bundle is washed and dried in a state where the peripheral speed of the heating roller 15 is 1.02 times the peripheral speed of the front roller pair 20, that is, the stretched and swollen plasticized wool fiber bundle is in tension. It was done in a let-down state.

The average fiber diameter of the obtained stretched and restored wool fiber was 19.62 μm. That is, the single fiber of the wool fiber bundle after stretching and fixing is reduced in diameter by about 13.5% on average with respect to the single fiber of the wool fiber bundle before stretching and fixing. Further, this stretch-fixed wool fiber bundle was immersed in warm water of 80 ° C. for 15 minutes, and then the average fiber diameter of the stretch-restored wool fiber was measured again. At this time, the average fiber diameter of the stretched restored wool fiber was 22.58 μm. In other words, this stretched and restored wool fiber was restored to raw hair by immersion in warm water.

A 60th stretch-restored wool spun yarn was produced using the stretch-restored wool fiber bundle produced in Example 4. Subsequently, a stretch-reconstructed composite wool spun yarn of 36th single yarn having a core-sheath structure in which the stretch-restored wool spun yarn was used as a core yarn and a cashmere sliver as a sheath yarn was produced by a conventional method. And when this stretched and restored composite woolen spun yarn is immersed in warm water of 80 ° C. for 15 minutes and taken out and dried, the stretched and restored woolen spun yarn of the core yarn is restored to the shape before stretching and the length is shortened, As a result, a spun yarn having a surface covered with bulky cashmere was obtained.

The stretched and restored wool spun yarn produced in Example 4 was spun into a 60th double yarn, and the double yarn was circularly knitted using a 16 gauge circular knitting machine at 3.5 times to prepare a knitted fabric. The circular knitted fabric was boiled in boiling water for 15 minutes, then treated with 1% by weight hydrogen peroxide at 40 ° C. for 30 minutes, washed with water, and further washed with 0.3% by weight aqueous acetic acid solution for 30 minutes. Neutralize for minutes. As a result, the knitted fabric contracted by 48% in the transverse (wale) direction and by 50% in the longitudinal (course) direction compared to before boiling. The cover factor (CF) of the knitted fabric before boiling was 0.45, whereas the cover factor (CF) of the knitted fabric after boiling was 0.85. Further, when the average fiber diameter of the stretched and restored wool fiber was measured by disassembling the knitted fabric, the value was 22.58 μm. That is, the stretched and restored wool fiber was restored to raw hair by immersion in warm water. In addition, the knitted fabric before boiling is shown in FIG. 9, and the knitted fabric after boiling is shown in FIG.

The stretched and contracted diameter animal hair fiber according to the present invention is an animal hair fiber having a fiber diameter thinner than that of natural fiber, and can be suitably used for clothing such as innerwear or high-class clothing. Moreover, this stretchable diameter animal hair fiber can be applied to a wide range of fields, such as chairs, interior materials, interior materials, etc., such as carpets, aircraft, and railways.

1 Animal hair fiber bundle 2 Swelling plasticized aqueous solution (swelling plasticizer)
5 Swelling plasticized animal hair fiber bundle 10 Back roller pair (upstream nip roller pair)
10N nip (upstream nip)
11 Backtop roller (first upstream roller)
12 Back bottom roller (second upstream roller)
15 Heating roller 16 Pressure roller 18 Stretch-fixed animal hair fiber bundle or stretched restored animal hair fiber bundle (extended stretchable animal hair fiber bundle)
19 Stretching zone 20 Front roller pair (downstream nip roller pair)
20N nip (downstream nip)
21 Front top roller (first downstream roller)
22 Front bottom roller (second downstream roller)
30 Swelling plasticization processing equipment 40 Stretching mechanism 50 Immobilization equipment (heating equipment)
60 Oxidation neutralization treatment tank (oxidation neutralization equipment)
100 Animal hair fiber drawing and fixing device

Claims (21)

1. A swelling plasticizing apparatus for producing a swelling plasticized animal hair fiber bundle by swelling plasticizing an animal hair fiber bundle with a swelling plasticizer;
   An upstream nip roller pair composed of a first upstream roller and a second upstream roller forming an upstream nip portion, and a downstream composed of a first downstream roller and a second downstream roller forming a downstream nip portion In an apparatus for producing a stretchable animal hair fiber comprising a drawing mechanism having a nip roller pair,
   The animal hair fiber bundle is passed through the swelling plasticization treatment device to produce the swelling plasticized animal hair fiber bundle,
   When viewed along the rotation axis of the first upstream roller, the swollen plasticized animal hair fiber bundle moves from the upstream nip portion toward the downstream nip portion between the upstream nip portion and the downstream nip portion. A method for producing an elongated stretched animal hair fiber in which the swollen plasticized animal hair fiber bundle is stretched in a state of flowing in an S shape or an inverted S shape.
2. When viewed along the rotation axis of the first upstream roller, a virtual straight line or a virtual extension straight line connecting the rotation axis of the first upstream roller and the rotation axis of the second downstream roller, and the second A virtual straight line or a virtual extension straight line connecting the rotation axis of the upstream roller and the rotation axis of the first downstream roller,
   The swollen plasticized animal hair fiber bundle includes the first upstream roller, the second upstream roller, the upstream nip portion, the second upstream roller, the first downstream roller, and the downstream nip portion in this order. The manufacturing method of the extended expansion diameter animal hair fiber of Claim 1 which contacts a 1st downstream roller and a said 2nd downstream roller.
3. The linear distance between the rotational axis of the second upstream roller and the rotational axis of the first downstream roller is greater than the linear distance between the rotational axis of the first upstream roller and the rotational axis of the second downstream roller. The manufacturing method of the extended stretch diameter animal hair fiber of Claim 2 short.
4. When the swollen plasticized animal hair fiber bundle is viewed along the rotation axis of the first upstream roller, at least from the “upstream nip portion” to “the rotation axis of the first upstream roller and the first rotation roller”. Of the second upstream roller up to the intersection of the virtual extension line connecting the rotation axis of the two upstream rollers and the outer peripheral line of the second upstream roller on the opposite side of the upstream nip. An outer peripheral surface portion, and an intersection of “a virtual extension line connecting the rotation axis of the first downstream roller and the rotation axis of the second downstream roller” and “the outer periphery line of the first downstream roller” 4. The stretchable diameter animal hair fiber according to claim 1, which is in contact with an outer peripheral surface portion of the first downstream roller from an “intersection on the side opposite to the downstream nip portion” to “the downstream nip portion”. Manufacturing method.
5. When viewed along the rotation axis of the first upstream roller, an imaginary straight line connecting the rotation axis of the first upstream roller and the rotation axis of the second downstream roller, and the second upstream roller A virtual straight line connecting the rotation axis and the rotation axis of the first downstream roller is located on the same virtual line,
   The swollen plasticized animal hair fiber bundle includes the first upstream roller, the second upstream roller, the upstream nip portion, the second upstream roller, the first downstream roller, and the downstream nip portion in this order. The manufacturing method of the extended expansion diameter animal hair fiber of Claim 1 which contacts a 1st downstream roller and a said 2nd downstream roller.
6. The method for producing an elongated stretch-diameter animal hair fiber according to any one of claims 1 to 5, wherein the swollen plasticized animal hair fiber bundle is stretched at a magnification of 1.1 to 3.0 times.
7. 7. The method for producing an elongated stretched animal hair fiber according to claim 1, wherein the swollen plasticized animal hair fiber bundle is stretched only by the upstream nip roller pair and the downstream nip roller pair.
8. The method for producing stretched-length animal hair fibers according to any one of claims 1 to 7, wherein the animal hair fiber bundle and the swollen plasticized animal hair fiber bundle are non-twisted.
9. The apparatus for producing the stretchable animal hair fiber has a heating device and an oxidation neutralization device,
   After the swollen plasticized animal hair fiber bundle is stretched, the swollen plasticized animal hair fiber bundle is kept at 60 ° C. or more and 150 ° C. by the heating device while the swollen plasticized animal hair fiber bundle is kept in tension. The temperature of the following ranges is heated to fix the swollen plasticized animal hair fiber bundle, and the swollen plasticized animal hair fiber bundle is oxidized by the oxidation neutralization device and then neutralized. A method for producing a stretchable animal hair fiber according to claim 1.
10. The apparatus for producing an elongated stretchable animal hair fiber further comprises a heating roller,
    The heating device heats the heating roller,
    The method for producing an extended stretchable animal hair fiber according to claim 9, wherein the swollen plasticized animal hair fiber bundle is directly contacted and fixed to the outer surface of the heating roller.
11. 11. The method for producing an extended stretchable animal hair fiber according to claim 10, wherein the swollen plasticized animal hair fiber bundle is fixed while being pressed by the heating roller and at least one pressure roller.
12. 12. The method for producing stretched animal hair fibers according to claim 1, wherein the swollen plasticized animal hair fiber bundle contains 60% by weight or more of the swelling plasticizer.
13. A stretched restored animal hair spun yarn comprising an elongated stretch-diameter animal hair fiber produced by the method for producing an elongated stretch-diameter animal hair fiber according to any one of claims 1 to 8.
14. An elongated stretchable animal hair fiber produced by the method of producing an elongated stretchable animal hair fiber according to any one of claims 1 to 8,
    A stretched restored composite animal hair spun yarn comprising fibers other than the above-mentioned stretched and contracted diameter animal hair fibers.
15. The stretched animal hair spun yarn according to claim 13 or the stretched and reconstructed composite animal hair spun yarn according to claim 14, wherein the stretched and stretched animal hair fiber is substantially restored to the fiber shape before stretching. Wool spinning yarn.
16. A fabric comprising the restored animal hair spun yarn according to claim 15.
17. The stretch-reconstructed animal hair spun yarn according to claim 13 or the stretch-reconstructed composite animal hair spun yarn according to claim 14, wherein the shape of the stretch-expanded animal hair fiber is substantially restored to the fiber form before stretching. A restored animal blanket manufactured by
18. In at least a part of the longitudinal direction, a single fiber having a circular cross-sectional shape in the radial direction and a single fiber having a non-circular cross-sectional shape in the radial direction are mixed,
    An average stretched diameter animal hair fiber bundle in which the average fiber diameter of the single fibers is within a range of 13 μm to 28 μm.
19. An animal hair fiber bundle mainly composed of the extended stretchable animal hair fiber bundle according to claim 18.
20. A stretch-fixed animal hair fiber spun yarn formed from the stretched diameter animal hair fiber bundle according to claim 18 or the animal hair fiber bundle according to claim 19.
21. 21. A fabric comprising the stretch-fixed animal hair fiber spun yarn of claim 20.

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