JP2009215669A - Knitted fabric - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a knitted fabric having especially beautiful mesh face and excellent cut resistance. <P>SOLUTION: The knitted fabric has a reversible structure formed by plating stitch, and fibers constituting a front side has 95 mol% or more of the repeating units being a multifilament yarn of a fiber made of a polyketone expressed by formula (1): -CH<SB>2</SB>-CH<SB>2</SB>-CO-. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a knitted fabric excellent in cut resistance having a particularly beautiful face.

Patent Document 1 discloses a metal insertion circular knitted fabric composed of an aramid fiber and a metal fiber. A reversible structure is formed by a splicing knitting, and the metal fiber is unevenly distributed on either the front or back side. It is described that the feeling of wearing such as a feeling of coarseness and a feeling of cooling is improved.
On the other hand, fibers made of polyketone (hereinafter referred to as polyketone fibers), like aramid fibers, provide knitted fabrics with excellent cut resistance, and are therefore suitable for use in flaw-proof clothing such as gloves that require cut resistance. Although being developed, a knitted fabric having a more beautiful eye surface is required particularly in a knitted fabric using a multifilament yarn.

JP 2005-009007 A

  This invention makes it a subject to provide the knitted fabric which has the beautiful eyes which responded to this request | requirement.

（２）裏側を構成する繊維が、嵩高な糸条であることを特徴とする上記（１）に記載の編地。
（３）上記（１）又は（２）に記載の編地により構成された手袋。 The inventors of the present invention have reached the present invention as a result of intensive studies to solve the above problems.
That is, the present invention is as follows.
(1) A knitted fabric having a reversible structure formed by splicing knitting, wherein the fibers constituting the front side are composed of a polyketone in which 95 mol% or more of the repeating units are represented by the following formula (1) A knitted fabric characterized by being multifilament yarn.

(2) The knitted fabric according to (1) above, wherein the fibers constituting the back side are bulky yarns.
(3) A glove constituted by the knitted fabric according to (1) or (2) above.

ADVANTAGE OF THE INVENTION According to this invention, the glove comprised by the knitted fabric excellent in the cut resistance which has especially a beautiful eye surface, and this knitted fabric is provided.

但し、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。 The present invention will be specifically described below.
In the polyketone constituting the polyketone fiber of the present invention, 95 mol% or more, preferably 98 mol% or more, particularly preferably 99.6 mol% or more of the repeating unit is represented by the above formula (1). The polyketone may contain a repeating unit other than the above formula (1), for example, one represented by the following formula (2) within a range of less than 5 mol%.

Where 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, esters It may be substituted with a 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, 15% or less, more preferably 10% or less, still more preferably 8% or less, and particularly preferably 6% or less. Is 100 cN / dtex or more, more preferably 200 cN / dtex or more, particularly preferably 300 cN / dtex or more, and 1000 cN / dtex or less.
The form of the polyketone fiber is a multifilament yarn, which may be uniform or thick in the length direction, and the cross-sectional shape of the fiber is round, triangular, L-shaped, T-shaped, Y-shaped, W-shaped , Yaba type, flat (with a 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.
A preferable single yarn fineness is 0.01 to 10 dtex, more preferably 0.1 to 3 dtex, and particularly preferably 0.5 to 3 dtex. Moreover, a preferable total fineness is 10-100,000 dtex, More preferably, it is 30-50000 dtex.

Multi-filament yarns of polyketone fibers include raw yarns, untwisted yarns and twisted yarns (single twisted yarns, various twisted yarns, etc.), entangled yarns, false twisted yarns (false twisted yarns such as pins, fiction and nip belts, partial orientation Undrawn yarn (POY) drawn false twisted yarn and first twist false twisted yarn (including first twist same direction false twist and first twist different direction false twist) and these 1 heater or 2 heater false twist yarns), Examples include bulky processed yarns such as false twisted yarns, fluid injection processed yarns, push-in processing, and knit deknitted processing that are twisted in the same direction as the false twisting direction or different directions. Further, composite spun yarn using multifilament yarn, for example, core yarn, silofil, hollow spindle, and the like are included.
In addition, the preferable twist coefficient (K) of a twisted yarn is 1000-30000. Here, the twist coefficient (K) is a value obtained by the following formula.
K = Y × D ^0.5
Where Y is the number of twists (T / m), D is the total fineness (dtex) of the yarn before twisting

  Further, if necessary, preferably in the range of 50% by mass or less, fibers other than polyketone fibers, such as natural fibers such as cotton and wool, cellulose fibers such as rayon fibers and lyocell fibers, polyester fibers (polyethylene terephthalate, Methylene terephthalate, polybutylene terephthalate and composite spun fibers such as copolyesters and conjugates thereof), polyamide fibers (nylon 6, 66, etc.), elastic fibers such as polyurethane elastic fibers, aramid fibers (para, meta) ), Various aromatic polyester fibers, polybenzimidazole fibers, polyvinyl alcohol fibers, poly (p-phenylenebenzobisoxazole) fibers, ultrahigh molecular weight polyolefin fibers, carbon fibers, ceramic fibers, glass fibers, metal fibers, and the like. Mixed with fiber It may also be used.

Mixing means are also used at the yarn stage, for example, composite spinning (core yarn, silofil, etc.), twisting (twisted yarn, various twisted yarn, triplet, etc.), entangled mixed fiber (low shrinkage yarn and high shrinkage yarn) Different shrinkage blended yarn, etc.), covering (single, double), composite false twist (simultaneous false twist, elongation difference false twist, phase difference false twist, low melting yarn, etc. Etc.) and two-feed fluid jet processing (with and without feed difference) and the like. At this time, the other fiber mixed with the polyketone fiber may form a sheath core structure (a heat treatment or the like may be added after mixing to form a sheath core structure). For example, the polyketone fiber may be a core component or sheath. Other fibers may be used as the other component.
In the present invention, when producing a knitted fabric using such a polyketone fiber, a knitted fabric having a reversible structure formed by splicing knitting is selected and used as a fiber constituting the front side (hereinafter referred to as a front yarn). This is characterized by the use of polyketone fiber multifilament yarns, and is most effective when a non-bulky yarn such as a multifilament yarn is used as the surface yarn.

  As the fiber constituting the back side (hereinafter referred to as the back yarn), the fibers exemplified as the fiber to be mixed with the polyketone fiber described above can be used, but for the purpose of the present invention, an organic fiber is preferable, more preferably. , Fibers having a different material from the surface yarn and / or yarn-shaped fibers are particularly preferable. In addition to spun yarn and false twisted yarn (in addition to two heater false twisted yarn, S (Z) false twisted yarn is further converted to Z (S ) Yarns with reduced torque, such as false twisted yarns, yarns twisted to Z (S), yarns obtained by aligning S false yarns and Z false twisted yarns, and entangled yarns Bulky processed yarns such as strips, fluid jetting yarns, covering yarns (single and double covering yarns), conjugated yarns (especially polytrimethylene terephthalate or polytrimethylene terephthalate and polyethylene terephthalate) Conjugates yarn with a combination of bets is preferred.) Bulky yarn crimp development by heat treatment as include the bulky yarn for further such bulky processed yarn to a like false twisting the conjugate yarn.

  As a preferred combination, for example, when the front yarn is a polyketone fiber multifilament yarn, the back yarn is a polyketone fiber spun yarn (single yarn, twin yarn or triplet, silospan, silofil, core yarn, etc.) Twisted yarn, etc.), bulky processed yarn of polyketone fiber multifilament yarn, bulky processed yarn of general synthetic fiber multifilament yarn such as polyester fiber and polyamide fiber, general synthetic fiber multifilament yarn (raw yarn) as elastic fiber such as polyurethane elastic fiber , Covering yarn (single and double covering yarn) covering the bulky processed yarn and conjugate yarn), conjugate yarn and yarn obtained by processing the conjugate yarn bulky.

In general, a knitted fabric having a reversible structure formed by splicing a knitted yarn emphasizes the function of a specific fiber by causing the specific fiber to be unevenly distributed on either the front or back side, and / or It is used for the purpose of concealing the defects possessed by the fibers. As in the present invention, the surface of the knitted fabric using the multi-filament yarn of polyketone fiber as the surface yarn is greatly improved, and the knitted fabric has a beautiful surface. Obtaining ground is something that has never been known before.
In splicing knitting, each yarn is regularly and regularly arranged in the 2-hole yarn feeder of the knitting machine, and the tension of the yarn and the insertion angle of the yarn with respect to the knitting needle are made uniform. Examples of such organizations include mock lodies, mock milan ribs, milan ribs, double pickets, tack reversible, etc., which are a combination of double knitting and flat knitting. There is also a method of supplying each yarn to the knitting needle from a separate yarn feeding guide. By supplying the back yarn to the upper part of the knitting needle and the front yarn to the lower part, the back yarn is on the back side of the knitted fabric and the front yarn is on the front side. The ratio at which appears increases.
Incidentally, a knitted fabric having a beautiful eye surface, which is the object of the present invention, is not obtained even if the yarns are arranged and fed simultaneously and knitted, and the cut resistance is also lowered.

  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, a benzophenone series, a benzotriazole series, a hindered amine series or the like in the form of fiber or knitted fabric) And / or an ultraviolet shielding agent (for example, fine particles such as titanium oxide, iron oxide, cerium oxide, etc., preferably having an average particle size of 0.01 to 0.6 μm). It is preferable. As a method of containing, for example, there is a method of applying or coating a resin or film containing an ultraviolet absorber and / or an ultraviolet shielding agent on a fiber or knitted fabric, and the content of the ultraviolet absorber and / or the ultraviolet shielding agent is In addition, 0.001 to 10% by mass is preferable based on the mass of the resin or film.

The present invention will be described more specifically based on 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, tensile elastic modulus 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) Appearance evaluation of glove eyes, etc. Visual inspection was conducted by five inspectors engaged in fiber research, and the following ranking was performed.
<Appearance evaluation>
○: A knitted fabric with extremely beautiful eyes.
(Triangle | delta): It is a knitted fabric in which a feeling of unevenness is felt a little.
X: A knitted fabric with an uneven surface.
(3) Cut resistance According to JIS-T-8052.

[Example 1]
As a front yarn, one 840 dtex / 625 f 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) A glove was produced with a 13 gauge glove knitting machine using one 2-heater false twisted yarn of polyester fiber multifilament yarn of 167 dtex / 72f as a backing yarn.
A polyketone fiber multifilament yarn was fed to the upper guide of the knitting needle, and a polyester fiber multifilament yarn was fed to the lower guide.
The obtained gloves were reversible gloves in which polyketone fiber multifilament yarn appeared on the surface and polyester fiber multifilament yarn appeared on the back surface.
As a result of the appearance evaluation of the glove, it was extremely excellent as ○. The cut resistance was excellent at 5N.

[Comparative Example 1]
A glove was produced in the same manner as in Example 1 except that one polyketone fiber multifilament yarn and one polyester fiber multifilament yarn were aligned and fed simultaneously.
The obtained glove was not a reversible structure as in Example 1, but a polyketone fiber multifilament yarn and a polyester fiber multifilament yarn appeared on both the front and back surfaces.
As a result of the appearance evaluation of the glove, it was inferior to Δ˜ × and Example 1. The cut resistance was also inferior to that of Example 1 at 4.5N.

  INDUSTRIAL APPLICABILITY The present invention provides a knitted fabric having a particularly beautiful face and excellent cut resistance, and is particularly useful for gloves and supporters (for example, arm covers and foot covers), which are typical anti-scratch clothing. It is.

Claims (3)

A multi-filament yarn of a knitted fabric having a reversible structure formed by splicing knitting, wherein the fibers constituting the front side are composed of a polyketone in which 95 mol% or more of repeating units are represented by the following formula (1) A knitted fabric characterized by being.

  The knitted fabric according to claim 1, wherein the fibers constituting the back side are bulky yarns.   A glove constituted by the knitted fabric according to claim 1 or 2.