JP2008274496A - Spun yarn - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spun yarn which can give gloves high in air permeability, giving refreshing feeling, excellent in stretchability, and extremely excellent in wear amenity. <P>SOLUTION: In this siro spun yarn or double roving spun yarn, fibers constituting the spun yarn is constituted by high strength staple fibers having a tensile strength of ≥10 cN/dtex. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a spun yarn, and is a spun yarn particularly suitable for gloves excellent in cutting prevention, having high air permeability, a refreshing feeling, excellent stretch properties, and extremely comfortable to wear. The present invention relates to a spun yarn that can provide excellent gloves.

  Patent Document 1 discloses a composite spun yarn using a short fiber as a core component and a filament yarn crimped yarn such as a para-aramid fiber as a sheath yarn. By using the composite spun yarn, fuzz is obtained. Although it is described that it is possible to provide a glove that is excellent in the smoothness of the yarn surface and fabric surface, for example, excellent in cut prevention and precision workability, the breathability, coolness, and stretchability are not sufficient. The wearing comfort was not sufficient.

JP 2005-256212 A

  The present invention provides a spun yarn having improved such disadvantages.

（３）上記（１）又は（２）に記載の紡績糸で構成されていることを特徴とする手袋。 The present inventor 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 spun yarn, which is a silo-spun spun yarn or a double roving spun yarn, wherein the fiber constituting the spun yarn is composed of short fibers of high strength fibers having a tensile strength of 10 cN / dtex or more.
(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). Spun yarn.

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

  The present invention provides a spun yarn that can provide a glove that is highly breathable, has a refreshing feeling, is excellent in stretchability, and is extremely excellent in wearing comfort.

The present invention will be specifically described below.
In the present invention, the high strength fibers having a tensile strength of 10 cN / dtex or more include 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 form may be short fibers, and may be uniform or thick in the length direction, and the cross-sectional shape of the fibers may be round, triangular, L-shaped, T-shaped, Y-shaped, W-shaped, eight Polygons such as leaf type, flat type (flatness of about 1.3-4, W type, I type, boomerang type, wave type, skewer type, eyebrows type, rectangular parallelepiped type, etc.), dogbone type, etc. It may be a mold, a multi-leaf type, a hollow type, or an irregular shape.

The preferred single yarn fineness is in the range of 0.01 to 10 dtex, more preferably 0.1 to 10 dtex, and particularly preferably 0.5 to 5 dtex.
In the present invention, one or more of such high strength fibers may be mixed together, and those composed of 100% of such high strength fibers are preferred, but 70% by mass or less, particularly 50% by mass or less, and further 30% by mass or less. In this range, if necessary, natural fibers such as cotton and wool, cellulose fibers such as rayon fibers and lyocell fibers, and general synthetic fibers such as polyester fibers and polyamide fibers may be used.

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, polyketone fibers preferable as high-strength 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 the range is less than 5 mol%. In addition, a repeating unit other than the above formula (1), for example, one 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 the hydrogen atoms of R are halogen groups. , An ester group, an amide group, a hydroxyl group, and an ether group may be substituted. 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有させてもよい。 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.
The present invention is a spun yarn which is a silospun spun yarn or a double roving spun yarn, and the fibers constituting the spun yarn are composed of short fibers of high strength fibers having a tensile strength of 10 cN / dtex or more.

The silospun spun yarn of the present invention is obtained by the following spinning method.
That is, the two rovings introduced into the pair of back rollers through different parallel travel paths into the draft region consisting of the pair of front roller, middle roller and back roller of the spinning machine are the draft of the spinning machine. Immediately after exiting the nip point of the front roller, it is obtained by being twisted by a twisting action of a ring traveler twisting mechanism and wound on a bobbin. A spinning method in which upper twist is applied to two single yarns while applying alternate twisting, and unlike a spinning method in which main twisting is applied to a single yarn, a direct twisted yarn can be obtained directly by a spinning machine.

In addition, the double roving spun yarn is obtained by aligning two roving yarns and introducing them into the back roller pair in the above production method, and similarly twisting them.
Here, the two rovings may be composed of the same material, or may be composed of different materials, for example, different fiber materials of high strength fibers or combinations other than high strength fibers and high strength fibers, The fineness and mass ratio of both may be selected as necessary within the range of, for example, 10 to 90/90 to 10, but the ratio of the high strength fiber in the spun yarn of the present invention is high strength. A fiber composed of 100% fiber is preferable, but fibers other than the above-described high-strength fibers may be mixed as necessary within a range of 70% by mass or less, particularly 50% by mass or less, and further 30% by mass or less. .

The fiber thickness, fiber length distribution, number of fibers, and fiber cross-sectional shape constituting the spun yarn of the present invention may be appropriately selected as necessary. For example, depending on the fiber material to be configured and the desired use. Cotton spinning, 2 inch spinning, 3 inch spinning, and eyelash spinning may be selected. For example, the fiber length is preferably about 30 to 200 mm, but may be about 300 to 400 mm if necessary. 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, and may be 1500 mm or less, 1200 mm or less, or 1000 mm or less.
The thickness of the spun yarn may be appropriately selected according to the use. For example, in the glove use, the English cotton count is 10 to 45, and particularly 10 to 30 is preferable. The spun yarn of the present invention exhibits its usefulness particularly when used as a glove, has high breathability, has a refreshing feeling, is excellent in stretchability, and has extremely excellent wearing comfort. Is 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 of these (hereinafter simply referred to as a fabric), natural leather such as pig leather, or artificial leather may be used as a glove that is cut into a hand shape and sewed. Therefore, what is necessary is just to comprise a part or all of this fabric.
In addition, as a fabric, the case of a single layer (composed of the front surface and the back surface) and the case of a multilayer structure (composed of the front surface, the back surface, and the intermediate layer) of two layers or three layers or more can be mentioned.

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).
Gloves may be used as they are, but various known treatments such as a part of or all of the gloves for the purpose of imparting anti-slip properties, vinyl chloride resin, latex, natural rubber on the outer surface of the palm or the entire outer surface. Further, 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 spun yarn of the present invention is useful for uses other than gloves, for example, protective materials such as arm covers and outdoor sports clothing.
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, hindered amine, etc.) in the form of fibers or spun yarn or woven or knitted fabric. There are one type or a combination of two or more types) and / or ultraviolet screening agents (for example, fine particles of titanium oxide, iron oxide, cerium oxide, etc.), and the average particle size is preferably 0.01 to 0.6 μm. ) Is preferably contained. Examples of the method of inclusion include a method of applying or covering a fiber or a spun yarn or a woven or knitted fabric with a resin or film containing an ultraviolet absorber and / or an ultraviolet shielding agent. The ultraviolet absorber and / or the ultraviolet shielding. The content of the agent is preferably in the range of 0.001 to 10% by mass with respect to the mass of the resin or film.

Hereinafter, the present invention will be described more specifically based on Examples and Comparative Examples, but the present invention is not limited to these Examples and the like.
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) Sensation of glove sensation, coolness, and soft texture A sensory test was conducted by touch by five inspectors engaged in fiber research, and the following ranking was performed.
<Steamy, cool, soft texture>
◯: Rich in stuffiness, coolness, and soft texture.
Δ: Feels stuffy, cool and soft.
X: A damp feeling, a cool feeling, and a soft texture are poor.

(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]
Using 1670dtex / 964f para-aramid fiber multifilament yarn (tensile strength 20cN / dtex, tensile elongation 4.5%, tensile elastic modulus 500cN / dtex), two rovings obtained by cutting to a fiber length of 51mm It was introduced into a pair of back rollers through different parallel running paths, drafted in the draft area of the spinning machine, and then twisted by a twisting action of a ring traveler, wound up on a bobbin to obtain a silospan spun yarn (English cotton count) 10/1's).
As a result of producing and evaluating a glove with a 7 gauge glove knitting machine using a combination of five spun yarns, the feeling of glove stuffiness, coolness, soft feeling (○ to △), wearing comfort It was excellent (○ to Δ). The cut resistance was 8N.

[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 feeling of stuffiness and coolness of the gloves Compared to Example 1, the soft texture (Δ to ×) and the wearing comfort (Δ to ×) were inferior. The cut resistance was 8N.

[Example 2]
Using a 1670 dtex / 1250f polyketone fiber multifilament yarn (Asahi Kasei Fibers Co., Ltd .; trademark Cyvalon; tensile strength 18 cN / dtex, tensile elongation 5%, tensile elastic modulus 350 cN / dtex), the fiber length was cut to 51 mm. A glove was produced and evaluated in the same manner as in Example 1 using the silospun spun yarn obtained in the same manner as in Example 1 except that the yarn was used. ), Precision workability (◯ to Δ) and excellent as in Example 1. The cut resistance was excellent at 9N.

  The present invention provides a spun yarn that can provide a glove with high breathability, a refreshing feeling, excellent stretchability, and extremely excellent wearing comfort.

Claims (3)

  A spun yarn, which is a silospun spun yarn or a double roving spun yarn, and the fibers constituting the spun yarn are short fibers of high strength fibers having a tensile strength of 10 cN / dtex or more. The 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 spun yarn according to claim 1 or 2.