JP2015120990A - Spun yarn and fiber structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive fiber in which the fiber has an excellent deodorant and deodorizing performance coping with various substances and functions other than the deodorant and deodorizing performance can be easily imparted to the fiber.SOLUTION: There is provided a spun yarn obtained by a method including the steps of: (1) binding adsorbent substances to filaments by graft polymerization; (2) cutting the resultant filaments obtained by the step (1) to form staple fibers; and (3) obtaining a spun yarn using, at least as a part, the resultant staple fibers obtained by the step (2).

Description

The present invention relates to a spun yarn and a fiber structure.

In recent years, since many functions are requested | required with respect to a fiber, the functional fiber which provided various functions is known. Examples of these include deodorant fibers. That is, clothing that can eliminate the smell of sweat by imparting the ability to adsorb odorous components to fibers has been studied. Many of the deodorant fibers used for such purposes are those obtained by coating a fiber structure with a deodorant compound, or those obtained by kneading a deodorant compound in a resin constituting the fiber.

However, since such a deodorant fiber is obtained by attaching a deodorant compound to the fiber, the deodorant compound is peeled off by repeated washing, and it is difficult to maintain the effect for a long time. There is a problem that.

In recent years, many highly functional fibers having various performances have been used. However, since conventional deodorant fibers often do not have sufficient deodorant functions, when used in combination with other functional fibers, sufficient deodorant functions cannot often be obtained. Therefore, a method for combining fibers having higher deodorizing performance with other functional fibers has been desired.

Patent Document 1 describes an adsorbing material composed of a substrate bonded with a macromonomer containing a polar functional group having adsorbing ability. One form of such an adsorbing material is disclosed which is made of fibers. However, since the fiber structure is processed after the fiber structure, the cost tends to increase, and it is difficult to provide a sufficient deodorizing function. Has the problem of being.

JP 06-327969 A

In view of the above, the present invention has excellent deodorization / deodorization performance that can handle various substances, and it is easy to provide functions other than deodorization / deodorization performance, and to provide a fiber with low cost. It is the purpose.

The present invention includes a step (1) of binding an adsorbent substance to a long fiber by graft polymerization,
Step (2) for obtaining a spun yarn using at least a part of the short fiber obtained in Step (2) and Step (2) as a short fiber by cutting the long fiber obtained in Step (1)
It is a spun yarn characterized by being obtained by the following.

The long fibers are preferably at least one selected from the group consisting of nylon long fibers, polyester long fibers, acrylic long fibers, and rayon long fibers.
The mixing ratio of the short fibers obtained in the step (1) and the step (2) is preferably 5 to 40% by weight with respect to the entire spun yarn.
The adsorptive substance is preferably a cationic substance adsorbing and / or an anionic adsorbing substance.

The spun yarn of the present invention has good deodorizing performance, can easily impart performance other than deodorizing performance, and has little influence on effects other than deodorizing performance, so that any known fiber It is possible to impart deodorant performance to the above.

The present invention is described in detail below.
The spun yarn of the present invention includes, as at least a part of the components, a short fiber by cutting the long fiber obtained by the step (1) and the step (1) of bonding an adsorbent substance to the long fiber by graft polymerization. The short fiber obtained by the step (2) is used.

In other words, instead of processing after making fiber structures such as woven fabrics and knitted fabrics, the short fibers obtained by cutting and then cutting the adsorbent substance by graft polymerization in the state of long fibers are used. It is characterized by doing. Since such a short fiber has a high deodorizing performance, it has a sufficient deodorizing function even when only a relatively small amount is mixed with the entire spun yarn. Therefore, a spun yarn having a deodorizing function can be obtained without impairing the performance of other fibers to be mixed.

Furthermore, when long fibers are used, the performance of the spun yarn is often not obtained in the feeling of use when the garment is worn. However, since short fibers are spun and used in the present invention, various fiber structures having excellent performance in texture and feeling of use can be obtained.

Such a short fiber can be obtained by the step (1) and the step (2) described above. Hereafter, these are demonstrated in detail along each process.

Step (1) is a step of binding an adsorbent substance to the long fibers by graft polymerization. That is, an anionic adsorbent (that is, a compound having an anionic functional group) or a cationic adsorbent (that is, a compound having a cationic functional group) is graft-polymerized to a compound constituting a long fiber. Thus, long fibers having adsorptivity are obtained. The substance thus obtained is excellent in washing resistance since the adsorbing substance is bonded to the substance constituting the fiber substrate through a chemical bond. Furthermore, since a cationic adsorbing substance and an anionic adsorbing substance can also be reacted together, it is possible to obtain a deodorizing performance that can deal with a wide range of substances. Furthermore, since an anionic functional group and a cationic functional group can be introduced at a high density, the deodorizing performance of the fiber itself is very high.

Examples of the cationic functional group include a carboxyl group, a sulfone group, a phosphoric acid group, a sulfoethyl group, a phosphomethyl group, and a carbomethyl group. These functional groups adsorb odorous substances such as ammonia and amines to obtain deodorizing performance. As the cationic adsorbing material, the above-described compounds having a functional group and an unsaturated bond can be suitably used. Examples of such a cationic adsorbing substance useful in the present invention include acrylic acid, methacrylic acid, styrene sulfonic acid and salts thereof, and 2-acrylamido-2-methylpropane sulfonic acid.

Examples of the anionic functional group include a quaternary ammonium group, and a primary to tertiary amine group such as an amino group, a methylamino group, a dimethylamino group, and a diethylamino group. Preferred anionic functional groups include quaternary ammonium groups and amino groups. The anionic functional group has the ability to adsorb polar substances and can neutralize with acidic substances such as hydrogen sulfide and mercaptans. As a result, the odorous substance that is an acidic substance is removed.

As the cationic adsorbing material, the above-described compound having a functional group and an unsaturated bond can be preferably used. Examples of such anionic adsorbents include vinylbenzyltrimethylammonium salt, diethylaminoethyl methacrylate, dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl acrylate, diethylaminomethyl methacrylate, tertiary butylaminoethyl acrylate, and tertiary butyl. Mention may be made of aminoethyl methacrylate and dimethylaminopropylacrylamide. Two or more of these can be used simultaneously.

Of these, particularly useful reactive monomers are vinylbenzyltrimethylammonium salt and diethylaminoethyl methacrylate. Also useful in the present invention are reactive monomers having groups that can be converted to anionic dissociative groups. An example of such a reactive monomer is chloromethylstyrene.

In the step (1), graft polymerization may be carried out using a compound having a hydrophilic group in combination. “Hydrophilic group” refers to a group that has an affinity for water and does not ionically dissociate when contacted with water (ie, a nonion). Such hydrophilic groups can trap water molecules present in the air, the trapped water molecules form an adsorbed water layer on the surface of the adsorbing material of the present invention, dissolve polar substances, and / or The ionic substance can be dissociated. Needless to say, such a hydrophilic group acts in water as well as in air.

Examples of the hydrophilic group include a hydroxyl group, a hydroxyalkyl group (wherein the alkyl group is preferably a lower alkyl group), an amino group, and a pyrrolidonyl group. More preferred hydrophilic groups include a hydroxyl group and a hydroxyalkyl group.
As the compound having a hydrophilic functional group, the above-described compound having a hydrophilic functional group and an unsaturated bond can be suitably used.

Examples of compounds useful in the present invention as the compound having a hydrophilic functional group include, for example, hydroxyethyl methacrylate, hydroxypropyl acrylate, vinyl pyrrolidone, dimethylacrylamide, ethylene glycol monomethacrylate, ethylene glycol monoacrylate, ethylene glycol monomethacrylate, ethylene There are glycol diacrylate, ethylene glycol dimethacrylate, triethylene glycol diacrylate and triethylene glycol methacrylate. Among these, particularly useful reactive monomers include hydroxyethyl methacrylate and vinyl pyrrolidone.

In the graft polymerization in the step (1), two or more kinds of various components as described above may be used in combination.
Specific examples of preferred combinations of functional groups when two or more are used in combination include a sulfone group, a carboxyl group, a quaternary ammonium group, and a hydroxyethyl group. Further, another preferred combination of functional groups in the present invention is specifically a sulfone group, a carboxyl group, a quaternary ammonium group, and a pyrrolidonyl group.

When a compound having a cationic functional group and a compound having an anionic functional group are used in combination and graft polymerization in the step (1) is performed, it is preferable in that a fiber capable of adsorbing a wide range of odorous substances can be obtained.

In the step (1) of the present invention, the long fiber used as a base material for graft polymerization is not particularly limited. For example, synthetic fibers such as polyester fibers, polyamide fibers, polyacrylic fibers, rayon fibers, semi-synthetic fibers, etc. Can be mentioned. Among them, the polyamide fiber is particularly preferable in that it has a structure capable of introducing a functional group into the molecular structure and has good compatibility when used by spinning with other fibers.

The thickness of the long fiber is not particularly limited, and a commonly used multifilament can be preferably used. Moreover, when using for a process (1), a long fiber may be arbitrary forms, such as the state wound up by the pan, the state wound up by the reed.

The specific method of the step (1) for bonding the adsorbent substance to such long fibers by graft polymerization is not particularly limited, but can be performed by radiation graft polymerization. Radiation graft polymerization is a method in which a base resin is radicalized to carry out a polymerization reaction, whereby the adsorbing substance described above can be attached to components constituting the fiber by chemical bonding. For this reason, the adsorptive substance does not peel off even by washing or the like, and can stably function over a long period of time.

In the step (1), a macromonomer as described in JP-A-06-327969 may be formed and this graft polymerization may be performed.

In the step (1), the adsorbing substance to be bonded on the fiber base material is preferably bonded at a ratio of 5 to 80% by weight with respect to the weight of the fiber base material. By setting it as the coupling | bonding amount in the said range, it is preferable at the point which can obtain favorable deodorizing and deodorizing performance.

In this invention, the process (2) which makes the short fiber by cutting the long fiber obtained by the process (1) mentioned above is performed. In the present invention, a spun yarn having at least a part of the deodorant / deodorant yarn is formed, thereby obtaining a fiber structure such as a woven fabric or a knitted fabric.

Since the fiber structure obtained from spun yarn has excellent texture, it can be used particularly suitably for clothing and the like. Further, by blending with other components in various proportions, it is possible to impart performances other than deodorizing / deodorizing performance to the yarn. Further, by using a combination of a plurality of types of deodorant / deodorant yarns, a fiber structure that can cope with many types of odorous substances can be obtained. For example, a fiber having an anionic functional group and a fiber having a cationic functional group obtained by the method as described above are separately manufactured, and these are mixed and used, so that a cationic odor substance, anionic Thus, a spun yarn that can handle both of the odorous substances can be easily obtained.

Such step (2) can be obtained by a known method. The short fiber length after cutting is not particularly limited, but can be, for example, 10 to 700 mm. Moreover, you may give well-known processes, such as crimp formation, before cutting. By performing such crimp formation, a change in fiber shape can be imparted. This is preferable in that the short fibers are easily entangled with each other and a suitable spun yarn can be obtained.

Next, in step (3), a spun yarn is obtained using at least a part of the short fibers obtained in the step (2). This achieves the above-described object. The spinning method is not particularly limited, and can be performed by any known method. Moreover, it is good also as a short fiber obtained by the process (2) mentioned above, and you may use it in combination with another short fiber.
Short fibers that can be used in combination are not particularly limited, and include synthetic fibers such as polyester fibers, polyamide fibers, and polyacrylic fibers, semi-synthetic fibers such as rayon fibers, and natural fibers such as cotton yarn and wool. it can.

When the spun yarn is combined with other fiber materials, it is preferable that the short fibers obtained by the above step (2) are contained in a proportion of 5% by weight or more of the whole. By doing in this way, suitable deodorizing and deodorizing performance can be obtained. Moreover, you may use 2 or more types of fibers of a different kind as a short fiber obtained by the said process (2). Moreover, it is preferable that the short fiber obtained by the said process (2) shall be 40 weight% or less of the whole. By making the amount of the short fiber used 40% by weight or less, the properties of other fibers used in combination can be sufficiently exhibited, and even if the amount used is reduced, a sufficient effect can be obtained, resulting in cost reduction. It is preferable at the point which has the effect.

Moreover, you may use another functional fiber as another short fiber used in the said process (3). For example, if used in combination with quick-drying fibers, heat-generating fibers, cooling-sensitive fibers, water-repellent fibers, heat-storing fibers, antibacterial fibers, etc., various functions other than deodorizing and deodorizing properties can be imparted to the spun yarn. You can also. In recent years, various functions have attracted attention in fibers. Therefore, this is preferable in that various functions can be combined in addition to the deodorizing performance, and a fiber having an excellent function can be obtained.

The spun yarn of the present invention can be made into a fiber structure such as woven fabric and knitted fabric by a usual method by using the spun yarn partly or entirely. The fiber structure thus obtained can be suitably used in the fields of clothing, bedding, curtains, toilet covers, towels, strings, cloth accessories and the like.

EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

  EXAMPLES Hereinafter, although this invention is demonstrated concretely based on an Example, this invention is not limited to these Examples. In the examples and comparative examples, “parts” and “%” are based on weight unless otherwise specified.

Example 1
Nylon yarn was immersed in a mixed aqueous solution containing an unsaturated compound having a cationic functional group and irradiated with radiation to perform graft polymerization.
The obtained deodorant functional yarn was thoroughly washed with warm water to remove unreacted components. When dried and weighed, the graft polymerization rate was about 10% by weight of the substrate.
The dried deodorant functional yarn was crimp-cut to a fiber length of about 50 mm to obtain a cottony deodorant functional fiber.

The cotton-like deodorant functional fiber was spun with polyester having a water-absorbing and quick-drying function to obtain a multi-function spun yarn having a deodorant functional yarn weight ratio of 20%.
A multifunctional woven fabric was produced using the obtained multifunctional spun yarn.

A deodorizing function test of the produced multifunctional fabric was performed. The multifunctional woven fabric was cut to 10 × 10 cm to prepare a sample, placed in a 5 L tedlar bag, and 3 L of 100 ppm ammonia was introduced. The ammonia concentration in the container was measured every predetermined time, and the deodorizing function was evaluated.
As a result, after 10 minutes, the ammonia concentration was 1.0 ppm, and it was found that the deodorizing function of the present invention has a very excellent deodorizing rate.

A water-absorbing quick-drying test of the produced multifunctional fabric was performed. The multifunctional woven fabric was cut into a diameter of 10 cm to prepare a sample, and then 0.1 mL of water was dropped to measure the weight.
The transpiration rate was calculated by leaving the sample in a standard state (20 ° C., 65% RH) and measuring the weight every predetermined time. When the transpiration rate after 20 minutes was determined, it was 60% or more, and excellent water-absorbing quick drying property could be confirmed.

The spun yarn of the present invention can be suitably used in clothing, bedding, curtains, toilet covers, towels, strings, cloth accessories, etc.

Claims (4)

A step (1) of binding an adsorbent substance to a long fiber by graft polymerization;
Step (2) for obtaining a spun yarn using at least a part of the short fiber obtained in Step (2) and Step (2) as a short fiber by cutting the long fiber obtained in Step (1)
A spun yarn obtained by the method described above. 2. The spun yarn according to claim 1, wherein the long fibers are at least one selected from the group consisting of nylon long fibers, polyester long fibers, acrylic long fibers, and rayon long fibers. The spun yarn according to claim 1 or 2, wherein a mixing ratio of the short fibers obtained in the step (1) and the step (2) is 5 to 40% by weight with respect to the whole spun yarn. The spun yarn according to claim 1, 2 or 3, wherein the adsorptive substance is a cationic substance adsorbing substance or an anionic adsorbing substance.