JP2008274495A - Composite spun yarn - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composite yarn which is especially suitable for gloves excellent in incision wound prevention, soft touch, swollen touch and wear amenity. <P>SOLUTION: This composite spun yarn having a structure where at least one yarn is wound around a substantially non-twisted staple fiber bundle is characterized in that the staple fiber bundle and/or the yarn is constituted by high strength fibers having a tensile strength of ≥10 cN/dtex. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a composite spun yarn, particularly a composite spun yarn suitable for a glove excellent in cutting prevention, and relates to a composite spun yarn capable of providing a glove excellent in soft feeling, swelling feeling and wearing comfort. .

  Patent Document 1 discloses a composite spun yarn using a short fiber as a core component and a crimped yarn of a filament yarn such as a para-aramid fiber as a sheath yarn. The composite spun yarn has less fluff and has a yarn surface. In addition, it is described that it is possible to provide a glove excellent in the smoothness of the fabric surface, for example, in cutting prevention and precision workability, but it is particularly satisfactory in terms of soft texture, feeling of swelling, and wearing comfort. It couldn't be said.

JP 2005-256212 A

  The present invention provides a composite spun yarn having improved such drawbacks.

（３）上記（１）又は（２）に記載の複合紡績糸で構成されていることを特徴とする手袋。 The inventor of the present invention has reached the present invention as a result of intensive studies to solve the above-mentioned problems.
That is, the present invention is as follows.
(1) A composite spun yarn having a structure in which at least one type of yarn is wound around a substantially untwisted short fiber bundle, and the short fiber bundle and / or the yarn has a tensile strength of 10 cN. A composite spun yarn comprising high-strength fibers of / dtex or higher.
(2) The high-strength fiber is a fiber (hereinafter referred to as a polyketone fiber) composed of a polyketone represented by the following formula (1) in which 95 mol% or more of the repeating units are represented by the above (1). Composite spun yarn.

(3) A glove comprising the composite spun yarn according to (1) or (2) above.

  The present invention provides a composite spun yarn having a sufficient swollen and soft feel without impairing the texture of short fibers, and particularly suitable for use in gloves excellent in cutting prevention. is there.

The present invention will be specifically described below.
In the present invention, high-strength fibers having a tensile strength of 10 cN / dtex or more are polyketone fibers, aramid fibers (para and meta), wholly aromatic polyester fibers, polybenzimidazole fibers, polyvinyl alcohol fibers, and poly (p-phenylene). Benzobisoxazole) fiber, ultrahigh molecular weight polyolefin fiber, carbon fiber, ceramic fiber, metal fiber and the like.
The upper limit of the tensile strength is not particularly limited, but for organic fibers, the upper limit is about 40 cN / dtex.
The fiber forms are short fibers and long fibers, which may be uniform or thick in the length direction, and the cross-sectional shape of the fibers is round, triangular, L-shaped, T-shaped, Y-shaped, W-shaped Type, eight leaf type, flatness (with flatness of about 1.3-4, W type, I type, boomerang type, wave type, skewer type, eyebrows type, rectangular parallelepiped type, etc.), dog bone type, etc. Polygon type, multi-leaf type, hollow type or irregular shape may be used.

The form of the yarn is spun yarn (including fine spun and twisted yarns such as silospan and silofil), multifilament yarn, and monofilament yarn, and the multifilament yarn is preferable for the purpose of the present invention. The filament yarn may be an original yarn (twisted yarn such as a non-twisted yarn or a sweet twisted yarn), but preferably a bulky processed yarn subjected to a conventionally known bulky process such as false twisting, fluid jetting, or knit deniting. Moreover, the raw yarn and the bulky processed yarn may be combined and used by drawing, blending, cross-twisting, or the like.
The preferred single yarn fineness is in the range of 0.01 to 10 dtex, more preferably 0.1 to 10 dtex, particularly preferably 0.5 to 5 dtex in the case of short fiber bundles, spun yarns, and multifilament yarns. The case is in the range of 10-100,000 dtex. Moreover, a preferable total fineness is the range of 10-100,000 dtex, More preferably, it is the range of 30-50000 dtex.

In the present invention, one or more of these high strength fibers may be mixed together, and the mixed form may be a known means such as blending, alignment, entanglement, twisting and the like.
Furthermore, in the present invention, it is preferable that the short fiber bundle and / or the yarn is composed of 100% of such high-strength fibers, but in the short fiber bundle and / or the yarn, it is 70% by mass or less, particularly 50% by mass or less. Furthermore, in the range of 30% by mass or less, if necessary, mixed with natural fibers such as cotton and wool other than high-strength fibers, cellulose fibers such as rayon fibers and lyocell fibers, and general synthetic fibers such as polyester fibers and polyamide fibers. May be.

但し式中、Ｒは、エチレン以外の炭素数１〜３０の有機基であり、例えば、プロピレン、ブチレン、１−フェニルエチレン等の基であり、Ｒの水素原子の一部または全部がハロゲン基、エステル基、アミド基、水酸基、エーテル基で置換されていてもよい。もちろん、Ｒは二種以上であってもよく、例えば、プロピレン基と１−フェニルエチレン基が混在していてもよい。 Hereinafter, preferred polyketone fibers for achieving the object of the present invention will be described in detail.
In the polyketone constituting the polyketone fiber, 95 mol% or more, preferably 98 mol% or more, particularly 99.6 mol% or more of the repeating unit is represented by the above formula (1), and in a range of less than 5 mol%. In addition, repeating units other than the above formula (1), for example, those represented by the following formula (2) may be contained.

In the formula, R is an organic group having 1 to 30 carbon atoms other than ethylene, for example, a group such as propylene, butylene, 1-phenylethylene, etc., and a part or all of R hydrogen atoms are halogen groups, It may be substituted with an ester group, an amide group, a hydroxyl group or an ether group. Of course, R may be two or more, for example, a propylene group and a 1-phenylethylene group may be mixed.

式中のｔ及びＴは、それぞれヘキサフルオロイソプロパノール（セントラル硝子（株）社製）及び該ヘキサフルオロイソプロパノールに溶解したポリケトンの希釈溶液の２５℃での粘度管の流過時間である。Ｃは、上記希釈溶液の濃度であり、ヘキサフルオロイソプロパノール１００ｍｌ中のポリケトンの質量（ｇ）である。
ポリケトンには必要に応じて、酸化防止剤、ラジカル抑制剤、他のポリマー、艶消し剤、紫外線吸収剤、難燃剤、金属石鹸等の添加剤を含んでいてもよい。 The intrinsic viscosity [η] of the polyketone is preferably 1 dl / g or more, more preferably 2 dl / g or more, particularly preferably 4 dl / g or more, preferably 20 dl / g or less, more preferably 15 dl / g or less, particularly Preferably it is 10 dl / g or less.
The intrinsic viscosity [η] is a value obtained based on the following definition formula.

In the formula, t and T are the flow times of the viscosity tube at 25 ° C. of hexafluoroisopropanol (manufactured by Central Glass Co., Ltd.) and a dilute solution of polyketone dissolved in the hexafluoroisopropanol, respectively. C is the concentration of the diluted solution and is the mass (g) of polyketone in 100 ml of hexafluoroisopropanol.
The polyketone may contain additives such as antioxidants, radical inhibitors, other polymers, matting agents, ultraviolet absorbers, flame retardants, and metal soaps as necessary.

Next, as preferable characteristics of the polyketone fiber, the tensile strength is 5 cN / dtex or more, more preferably 10 cN / dtex or more, particularly preferably 15 cN / dtex or more, 30 cN / dtex or less, and the tensile elongation is 3% or more, More preferably 3.5% or more, particularly preferably 4% or more and 15% or less, more preferably 10% or less, still more preferably 8% or less, particularly preferably 6% or less, and the tensile modulus is 100 cN / dtex. Above, more preferably 200 cN / dtex or more, particularly preferably 300 cN / dtex or more and 1000 cN / dtex or less.
In the present invention, a composite spun yarn having a structure in which at least one type of yarn is wound around a substantially untwisted short fiber bundle, and the short fiber bundle and / or the yarn This is a composite spun yarn made of strong fibers.

In the present invention, the fact that the short fiber bundle is substantially untwisted means that the short fiber bundle is not actively twisted in the step of combining with the yarn and the post-processing step. However, since the twist accompanying unwinding from a winding package may enter, it is preferable that the short fiber bundle has a twist number of 10 T / m or less.
In the composite spun yarn of the present invention, a substantially untwisted short fiber bundle is relatively positioned at the core at the stage where the composite spun yarn is produced by a spinning machine or the like, and the yarn is wound around the core (sheath). Although it has a attached yarn structure, after heat treatment such as dyeing, it is a structure in which the substantially untwisted short fiber bundle and the wound yarn are wound in a side-by-side positional relationship. Alternatively, the sheath portion and the core portion may reverse the positional relationship so that the short fiber bundle is wound around the yarn. By forming such a yarn structure, the untwisted short fiber bundle is projected from the side surface of the composite spun yarn, and the tactile sensation of the surface of the fabric such as a woven or knitted fabric using the composite spun yarn is similar to that of the short fiber itself. It becomes stronger, the texture of the short fiber becomes stronger, and the bulge becomes larger.

In order to obtain a composite spun yarn having such a yarn structure, the thermal contraction rate of the fibers constituting the yarn to be beaten is made larger than the thermal contraction rate such as boiling water shrinkage rate of the fibers constituting the short fiber bundle. Is achieved. For example, in terms of boiling water shrinkage, it is preferable to increase it by about 3 to 15%.
The total fineness of the composite spun yarn of the present invention is not particularly limited, but is preferably in the range of 50 to 1000 dtex. The appropriate number of wrappings per unit length (number of wrappings) varies depending on the average fiber length of short fibers, but the following formula using the total fineness (metric number) of composite spun yarn Is preferably 40 to 150, more preferably 50 to 130, and still more preferably 60 to 110.
Wrapping coefficient α = number of wrappings (T / m) / (total fineness of composite spun yarn (meter count)) ^0.5
In the composite spun yarn of the present invention, since continuous yarns are scattered around the short fiber bundle, even if the wrapping coefficient is slightly smaller than the twist coefficient of the spun yarn composed of 100% short fibers, the strength of the yarn Can be kept well. In order to make a composite spun yarn with a softer texture, the lapping coefficient of the composite spun yarn is preferably 10% or more smaller than the standard twist coefficient of the spun yarn composed of 100% short fibers, and is preferably 20% or more smaller. More preferred.

The method for producing the composite spun yarn of the present invention is not particularly limited, and for example, it can be produced by the following method.
In general, a spinning machine called a hollow spindle spinning machine is used, and a rough yarn produced by passing a short fiber through a normal pre-spinning process is drafted to a desired thickness with a roller draft device, and the hollow spindle has a hollow hole. To introduce. On the other hand, the yarn to be wound is wound around a bobbin, and the bobbin is mounted on a hollow spindle so as to rotate integrally with the hollow spindle. It is wound around a short fiber bundle running inside and wound around a paper tube to make a composite spun yarn.
The hollow spindle spinning machine may be a spinning machine in which hollow spindles rotating in opposite directions are installed in two upper and lower stages. In this case, install a bobbin wound with at least one of the yarns, and install a bobbin with the same yarn or a different yarn on the other. After the yarn is wound around the yarn, a yarn serving as a presser yarn may be wound around the yarn.

In addition, when drafting the coarse yarn made of short fibers and introducing it into the hollow hole of the hollow spindle, the yarn is simultaneously introduced from the front roller or other supply roller of the draft device, and different yarns are wound around it. Also good.
Furthermore, the short fiber bundle and the yarn wound around the short fiber bundle may be entangled using an interlace device or the like.
In the present invention, the core may be a short fiber bundle, and the fiber thickness, fiber length distribution, number of fibers, and fiber cross-sectional shape may be appropriately selected as necessary. For example, the short fiber bundle Cotton spinning, 2 inch spinning, 3 inch spinning, and eyelash spinning may be selected according to the fiber material and desired application. For example, the fiber length is preferably about 30 to 200 mm, but if necessary, It may be about 300 to 400 mm, and further, the average fiber length obtained by checking is 70 mm or more, more preferably 100 mm or more, particularly 200 mm or more, further 250 mm or more, 1500 mm or less, particularly 1200 mm or less, further 1000 mm or less. Things can be used.

The composition ratio of the core part and the sheath part in the composite spun yarn in the present invention is preferably a core / sheath part ratio of 10 to 90/90 to 10, particularly 40 to 90/60 to 10, more preferably 50 to 90. The range is / 50-10.
The composite spun yarn of the present invention exhibits its usefulness particularly when used as a glove (for example, when used in normal double yarn processing), and has a soft feel and excellent wearing comfort. Gloves that are superior in wound prevention can be provided.
The gloves include knitted fabrics, woven fabrics, non-woven fabrics, and those composed of a combination of these. Examples include gloves knitted using a commercially available computer glove knitting machine such as Shima Seiki Seisakusho. .

In addition, knitted fabrics (flat knitted fabrics, circular knitted fabrics, warp knitted fabrics), woven fabrics (flat, twill, satin and their changed structures, entangled woven fabrics), non-woven fabrics (spunbond nonwoven fabrics, needle punches, non-woven fabrics entangled with columns, etc.) , Felt, etc.) as well as a combination thereof (hereinafter simply referred to as “fabric”), natural leather such as pig leather, or artificial leather, which may be used as a hand-cut glove and used as a glove. Therefore, a part or all of the fabric may be formed.
In addition, as a fabric, there are a case of a single layer (composed of a front surface and a back surface) and a multilayer structure of two or more layers (composed of a front surface, a back surface and an intermediate layer).

Multilayered fabrics include reversible single knit, double knit, sliver knit, cardboard knit and double rassell for knitted fabrics, double velvet looms for woven fabrics, and one or two or more types of fiber webs laminated in multiple layers. Or a fiber web and a knitted fabric laminated in multiple layers and entangled. Here, the intermediate layer refers to a binding yarn, a connecting yarn, and an insertion yarn (including a spun yarn, a filament yarn, and a sliver).
In addition, although gloves may be used as they are, various conventionally known treatments such as a part or all of gloves for the purpose of imparting anti-slip property, vinyl chloride resin, latex, natural rubber, An elastomer such as synthetic rubber may be coated or laminated by a known means. Further, in order to prevent stuffiness, a gas permeable and liquid impermeable elastomer such as porous or nonporous polyurethane or porous polytetrafluoroethylene (PTFE) may be coated or laminated. An elastomer such as rubber may be further processed on the glove.

Specific examples of the use of gloves include iron making, welding, painting, fire fighting, and car racing racing. In the present invention, in particular, because of excellent wearing comfort, for precision machinery industry, aircraft It is suitable for fields that require delicate work such as industry, information equipment industry, medical surgery or hygiene.
The composite spun yarn of the present invention is also useful for uses other than gloves, such as protective materials such as arm covers and outdoor sports clothing.
In addition, for example, for the purpose of suppressing a decrease in the tensile strength of the polyketone fiber by receiving strong ultraviolet rays outdoors, an ultraviolet absorbent (for example, benzophenone series, benzotriazole series, There are one kind or a combination of two or more kinds of hindered amines.) And / or UV screening agents (for example, fine particles such as titanium oxide, iron oxide, cerium oxide, etc.), and the average particle diameter is preferably 0.01 to 0.6 μm. .) Is preferably contained. Examples of the method of inclusion include, for example, a method in which a fiber or composite spun yarn or woven or knitted fabric is provided with or coated with a resin or film containing an ultraviolet absorber and / or an ultraviolet shielding agent, and the ultraviolet absorber and / or ultraviolet shielding. As for content of an agent, 0.001-10 mass% is preferable with respect to the mass of resin or a film.

The present invention will be described more specifically based on examples and comparative examples, but the present invention is not limited to these examples.
The measurement method and evaluation method in the present invention are as follows.
(1) Tensile strength, tensile elongation, and tensile modulus of fiber Measured according to JIS-L-1013.
Sample length: 20 cm, tensile speed: measured at 20 cm / min, and an average value is obtained when measured 20 times.
(2) Gloves soft texture, swelling feeling Sensory inspection by touch was conducted by five inspectors engaged in fiber research, and the following ranking was performed.
<Soft texture>
○: Feels soft and swelled.
Δ: Feels soft and bulging.
X: Soft feel, poor swell, and hard.

(3) Gloves wearing comfort Sensory inspection by wearing was conducted by five inspectors engaged in the research of textiles, and the following ranking was performed.
<Wearing comfort>
○: Excellent wearing comfort.
Δ: Slightly superior in wearing comfort
X: Wearing comfort is inferior.
(4) Cut resistance According to JIS-T-8052.

[Example 1]
A 280 dtex para-aramid fiber multifilament yarn (tensile strength 20 cN / dtex, tensile elongation 4.5%, tensile elastic modulus 500 cN / dtex) is wound around a bobbin with a collar, and a hollow spindle spinning machine (Kozeki Tosho Co., Ltd.) ), Tri Spinner) hollow spindle.
On the other hand, a 1670 dtex / 964 f para-aramid fiber multifilament yarn (tensile strength 20 cN / dtex, tensile elongation 4.5%, tensile elastic modulus 500 cN / dtex) was used as the short fiber bundle, and the fiber length was cut to 51 mm. Was used to produce a roving yarn having a thickness of 0.4 g / m in a combing process. The obtained roving is put on a tri-spinner, drafted with a roller draft device, introduced into the hollow hole of the hollow spindle, and the multifilament yarn supplied from the rotating bobbin is introduced into the hollow hole in the same manner to obtain a short fiber bundle. Was wound around the thread and wound around a thread tube with a winder. The draft ratio of the roving yarn was set so that the spinning count of the composite spun yarn was English cotton count and 20/1's. Further, the number of wrappings was set such that the twist coefficient α in terms of metric count was set to 95 (wrapping number 551 T / m), and the rotation speed of the spindle was 7000 rpm.
The obtained composite spun yarn was a composite spun yarn having a structure in which para-aramid fiber multifilament yarns were wound around a substantially untwisted para-aramid fiber short fiber bundle.
As a result of making and evaluating a glove with a 7 gauge glove knitting machine using five yarns obtained by twining this composite spun yarn by a conventional method, the soft feeling of the glove, the feeling of swelling ( (Circle)-(triangle | delta) and the wearing comfort ((circle)-(triangle | delta)) were excellent. The cut resistance was 8.5N.

[Comparative Example 1]
Using 1670 dtex / 964f para-aramid fiber multifilament yarn (tensile strength 20 cN / dtex, tensile elongation 4.5%, tensile elastic modulus 500 cN / dtex), cut to a fiber length of 51 mm, and no short fiber fleece, When producing spun yarn with a ring spinning machine, the 280 dtex para-aramid fiber multifilament yarn is 1.05 times faster than the speed of the short fiber fleece (equivalent to the speed of the front roller of the spinning machine). To the front roller of the fiber, faster than the short fiber fleece, and the fineness of the sheath core structure in which the para-aramid fiber multifilament yarn mainly forms the sheath part, and the para-aramid fiber short fiber mainly forms the core part. A spun yarn (English cotton count, equivalent to 20/1's, Z twist of 15.7 twists / 2.54 cm) was obtained. The obtained spun and twisted yarn was a spun and twisted yarn having a structure in which a para-aramid fiber multifilament yarn was wound around a para-aramid fiber short fiber bundle having a real twist.
As a result of making and evaluating a glove with a 7 gauge glove knitting machine using five yarns obtained by twining these finely spun and twisted yarns by a conventional method, the soft feeling and swelling of the gloves Compared to Example 1, the feeling (Δ to ×) and precision workability (Δ to ×) were inferior. The cut resistance was 8N.

[Example 2]
Using a polyketone fiber multifilament yarn (manufactured by Asahi Kasei Fibers Co., Ltd .; trademark Cyvalon; tensile strength 18 cN / dtex, tensile elongation 5%, tensile elastic modulus 350 cN / dtex) with a short fiber bundle of 1670 dtex / 1250f Cut to 51 mm, the yarn to be crushed (280 dtex) is a polyketone fiber multifilament yarn (manufactured by Asahi Kasei Fibers Co., Ltd .; trademark Cyvalon; tensile strength 18 cN / dtex, tensile elongation 5%, tensile elastic modulus 350 cN / dtex) As a result of producing and evaluating a glove in the same manner as in Example 1 using the composite spun yarn obtained in the same manner as in Example 1, except for using a soft glove, feeling of swelling (○), precision The workability (◯ to Δ) was excellent as in Example 1. The cut resistance was excellent at 9.5N.

  The present invention provides a composite spun yarn particularly suitable for a glove having excellent cut prevention, soft texture, feeling of swelling, and wearing comfort.

Claims (3)

  A composite spun yarn having a structure in which at least one type of yarn is wound around a substantially untwisted short fiber bundle, wherein the short fiber bundle and / or the yarn has a tensile strength of 10 cN / dtex or more. Composite spun yarn characterized by comprising high-strength fibers. 2. The composite spun yarn according to claim 1, wherein the high-strength fiber is a fiber in which 95 mol% or more of the repeating units are composed of a polyketone represented by the following formula (1).

  A glove comprising the composite spun yarn according to claim 1 or 2.