JP7086677B2 - Polyester core-sheath composite staple fibers, spun yarns containing the staples and fabrics containing the staples - Google Patents
Polyester core-sheath composite staple fibers, spun yarns containing the staples and fabrics containing the staples Download PDFInfo
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- 239000000835 fiber Substances 0.000 title claims description 118
- 239000002131 composite material Substances 0.000 title claims description 56
- 229920000728 polyester Polymers 0.000 title claims description 56
- 239000004744 fabric Substances 0.000 title claims description 47
- 230000006750 UV protection Effects 0.000 claims description 39
- 239000010419 fine particle Substances 0.000 claims description 18
- 229910052809 inorganic oxide Inorganic materials 0.000 claims description 10
- 239000008358 core component Substances 0.000 claims description 7
- 239000000306 component Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 description 22
- 238000009987 spinning Methods 0.000 description 21
- 229920000742 Cotton Polymers 0.000 description 14
- 238000003801 milling Methods 0.000 description 14
- 238000009940 knitting Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 7
- -1 alkali metal titanate Chemical class 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000002759 woven fabric Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 229920002978 Vinylon Polymers 0.000 description 4
- 238000002788 crimping Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 3
- 238000009941 weaving Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000005431 greenhouse gas Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000002074 melt spinning Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000005360 mashing Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000007378 ring spinning Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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- Knitting Of Fabric (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Multicomponent Fibers (AREA)
- Woven Fabrics (AREA)
Description
本発明は、紫外線防止性に優れたポリエステル芯鞘複合短繊維、該短繊維を含む紡績糸及び該短繊維を含む布帛に関する。 The present invention relates to polyester core-sheath composite staple fibers having excellent UV protection, spun yarns containing the staples, and fabrics containing the staples.
地上に到達する太陽光の波長領域は紫外線領域から赤外線領域まで広範な領域にわたる。そして、地上に到達する太陽光の全エネルギー量のうち、赤外線のエネルギー量が占める比率は約４２％である。該赤外線は、物質に吸収されやすく、かつ、物質に吸収されると物質を構成する分子の熱振動を励起し物質の温度を上昇させる効果が高く、「熱線」とも呼ばれている。 The wavelength range of sunlight that reaches the ground covers a wide range from the ultraviolet region to the infrared region. The ratio of infrared energy to the total energy of sunlight reaching the ground is about 42%. The infrared rays are easily absorbed by a substance, and when absorbed by the substance, they have a high effect of exciting thermal vibrations of molecules constituting the substance and raising the temperature of the substance, and are also called "heat rays".
昨今、温室効果ガスの増大による地球温暖化が危惧されており、地球規模での環境変化に警鐘が鳴らされている。そのため、温室効果ガスを削減させるべく、省エネルギー化を含む様々な取り組みがおこなわれている。 Recently, there are concerns about global warming due to the increase in greenhouse gases, and warnings are being given to environmental changes on a global scale. Therefore, various efforts including energy saving are being made to reduce greenhouse gases.
省エネルギー化に貢献する取り組みの一環として、異常気象等と呼ばれる高気温が続く夏場において赤外線による衣服内の温度上昇を防ぐべく、様々な衣服の開発がおこなわれている。また、紫外線についても、オゾンホールの増大により地上に到達する線量が年々増大し人体に対する悪影響が指摘されることから、該紫外線から肌を保護することのできる衣服の開発もおこなわれている。このように、赤外線及び紫外線を遮蔽する機能を衣服に持たせるべく、該衣服を構成する素材の高付加価値化が図られている。 As part of efforts to contribute to energy conservation, various clothes are being developed to prevent the temperature inside clothes from rising due to infrared rays in the summer when high temperatures such as abnormal weather continue. As for ultraviolet rays, the dose reaching the ground increases year by year due to the increase in ozone holes, and it is pointed out that there is an adverse effect on the human body. Therefore, clothes that can protect the skin from the ultraviolet rays are being developed. As described above, in order to give clothes a function of shielding infrared rays and ultraviolet rays, the materials constituting the clothes are added value.
赤外線を遮蔽する素材として、チタン酸化物又はニッケル等の金属薄膜を、繊維や生地の表面にスパッタリングや蒸着などの方法を用いてコーティングさせた素材が知られている。しかし、該素材は、繊維や生地の風合いが損なわれるばかりでなく、洗濯や磨耗による耐久性が低いため赤外線を遮蔽する機能の維持が難しいことから、一般衣料として実使用に耐えることのできる製品の実用化はされていない。 As a material for shielding infrared rays, a material in which a metal thin film such as titanium oxide or nickel is coated on the surface of a fiber or a cloth by a method such as sputtering or vapor deposition is known. However, this material not only impairs the texture of fibers and fabrics, but also has low durability due to washing and abrasion, making it difficult to maintain the function of shielding infrared rays, so it is a product that can withstand actual use as general clothing. Has not been put into practical use.
また、赤外線や紫外線を遮蔽する繊維として、チタン酸アルカリ金属、チタン酸アルカリ土類金属などのセラミックス微粒子を含有した繊維が知られている（例えば、特許文献１及び２参照。）。しかし、該繊維は赤外線及び紫外線を遮蔽する機能の維持は可能であるが、該セラミックス微粒子が繊維表面に露出する場合があり、繊維化する際のトラブルや糸条ガイドローラーとの接触時に起こる磨耗の問題が解決できず、製糸工程及び製編工程における工程通過性の問題が残されていた。
Further, as a fiber that shields infrared rays and ultraviolet rays, a fiber containing ceramic fine particles such as an alkali metal titanate and an alkaline earth metal titanate is known (see, for example,
本発明の目的は、上記の問題を解決し、布帛を構成する糸条の製糸工程及び該布帛を構成する製編織工程での通過性が良好であり、紫外線防止性に優れたポリエステル芯鞘複合短繊維、該短繊維を含む紡績糸、該短繊維を含む二層構造紡績糸及び該短繊維を含む布帛を提供するものである。 An object of the present invention is to solve the above-mentioned problems, and to have good passability in the yarn-making process of the yarns constituting the fabric and the knitting-knitting process of the fabric, and the polyester core-sheath composite having excellent UV protection. It is an object of the present invention to provide a short fiber, a spun yarn containing the short fiber, a two-layer structure spun yarn containing the short fiber, and a fabric containing the short fiber.
上述の目的を達成するために、発明者が鋭意検討したところ、特定のポリエステル複合短繊維とすることにより紫外線防止性能が顕著に向上することを見出し、さらに検討を重ねることにより本発明に到達したものである。すなわち、本発明は、以下の項１～項３を要旨とするものである。
項１．芯成分を形成するポリエステルに無機酸化物微粒子を３～１５質量％含有し、鞘成分を形成するポリエステルに無機酸化物微粒子を０～１質量％含有したポリエステル芯鞘複合短繊維を含む二層構造紡績糸であって、前記短繊維が下記（１）～（３）を満足し、かつ二層構造紡績糸は下記（４）～（５）を満足することを特徴とする二層構造紡績糸。
（１）前記短繊維の繊維長が２０～７０ｍｍ。
（２）前記短繊維の捲縮数が５～２０ヶ／２５ｍｍ。
（３）前記短繊維の捲縮率が５～３０％。
（４）二層構造紡績糸の芯部と鞘部の芯／鞘比（質量比）が１０／９０～５０／５０。
（５）二層構造紡績糸中の前記短繊維の含有率が３０～９０質量％。
項２．項１に記載の二層構造紡績糸を含む布帛。
項３．紫外線防止指数（ＵＰＦ）が２０以上である項２記載の布帛。
As a result of diligent studies by the inventor in order to achieve the above-mentioned object, it was found that the ultraviolet protection performance was remarkably improved by using a specific polyester composite staple fiber, and the present invention was reached by further studies. It is a thing. That is, the gist of the present invention is the following
(1) The fiber length of the staple fiber is 20 to 70 mm.
(2) The number of crimps of the staple fibers is 5 to 20/25 mm.
(3) The crimp ratio of the staple fibers is 5 to 30%.
(4) The core / sheath ratio (mass ratio) of the core and the sheath of the two-layer structure spun yarn is 10/90 to 50/50.
(5) The content of the short fibers in the two-layer structure spun yarn is 30 to 90% by mass.
本発明によれば、布帛を構成する繊維の製糸工程及び該布帛を編成する製編織工程での通過性が良好であって、かつ、紫外線を効果的に遮蔽することができるポリエステル布帛を得ることができる。そして、該布帛はインナーウエア、肌着、ワーキングウエア、ユニフォーム、アウターウエア、スポーツウエア、インテリア、カーテン、帽材等などに好ましく用いることができる。 According to the present invention, it is possible to obtain a polyester fabric having good passability in the yarn-making process of the fibers constituting the fabric and the knitting and weaving process of knitting the fabric, and capable of effectively shielding ultraviolet rays. Can be done. The fabric can be preferably used for innerwear, underwear, working wear, uniforms, outerwear, sportswear, interiors, curtains, cap materials and the like.
以下、本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail.
本発明でいうポリエステルとは、エステル結合を有する合成重合体をいい、例えば、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリプロピレンテレフタレート等が挙げられる。各ポリマーは、ホモポリマーに限らず、ブレンド体、共重合体等でもよいことはいうまでもない。 The polyester in the present invention refers to a synthetic polymer having an ester bond, and examples thereof include polyethylene terephthalate, polybutylene terephthalate, and polypropylene terephthalate. Needless to say, each polymer is not limited to a homopolymer, but may be a blended product, a copolymer, or the like.
本発明でいう無機酸化物微粒子は、太陽光の遮蔽効果が高いものであれば特に限定されないが、例えば、酸化チタン、酸化カルシウム、酸化マグネシウム、又は酸化亜鉛等の微粒子が挙げられる。中でも、酸化チタン微粒子が好ましい。 The inorganic oxide fine particles referred to in the present invention are not particularly limited as long as they have a high sunlight shielding effect, and examples thereof include fine particles such as titanium oxide, calcium oxide, magnesium oxide, and zinc oxide. Of these, titanium oxide fine particles are preferable.
芯部を形成するポリエステルは、無機酸化物微粒子を３～１５質量％含有することが必要であり、工程通過性と紫外線防止性の両立の観点から、３～１０質量％含有することが好ましく、３．５～５質量％含有することがより好ましい。 The polyester forming the core needs to contain 3 to 15% by mass of inorganic oxide fine particles, and preferably contains 3 to 10% by mass from the viewpoint of achieving both process passability and UV protection. It is more preferably contained in an amount of 3.5 to 5% by mass.
鞘成分を形成するポリエステルは、無機酸化物微粒子を０～１質量％含有することが必要であり、工程通過性と紫外線防止性の両立の観点から、０．０１～０．８質量％含有することが好ましく、０．０５～０．７質量％含有することがより好ましく、０．１～０．５質量％含有することがよりいっそう好ましい。 The polyester forming the sheath component needs to contain 0 to 1% by mass of inorganic oxide fine particles, and contains 0.01 to 0.8% by mass from the viewpoint of achieving both process passability and UV protection. It is preferably contained in an amount of 0.05 to 0.7% by mass, more preferably 0.1 to 0.5% by mass, and even more preferably 0.1 to 0.5% by mass.
本発明でいう芯鞘複合短繊維は、上記ポリエステルの１種以上よりなるもので、芯成分と鞘成分は同一のポリエステルであっても異なるポリエステルであってもよいが、その単フィラメントの横断面において、芯成分の横断面が回転対称形で配置されていることが好ましい。ここで回転対称形とは、横断面の中心点を軸にして一定角回転させると元の形と重なるものをいい、芯成分が単成分でなる場合には、横断面の中心点を軸にして一定角回転させると元の形と重なる横断面形状を呈していて、芯成分部が島状に複数個ある場合にも、単フィラメントの横断面の中心点を軸にして一定角回転させると元の形と重なる位置に配置されている。 The core-sheath composite staple fiber referred to in the present invention is made of one or more of the above polyesters, and the core component and the sheath component may be the same polyester or different polyesters, but the cross section of the single filament thereof. In, it is preferable that the cross section of the core component is arranged in a rotationally symmetric shape. Here, the rotationally symmetric shape means a shape that overlaps with the original shape when rotated by a certain angle about the center point of the cross section, and when the core component is a single component, the center point of the cross section is used as the axis. When it is rotated by a certain angle, it has a cross-sectional shape that overlaps with the original shape, and even if there are multiple core component parts in an island shape, if it is rotated by a constant angle around the center point of the cross section of the single filament. It is placed in a position that overlaps with the original shape.
芯鞘複合比率としては、芯／鞘比（質量比）で、２／８～８／２が好ましく、３／７～７／３がより好ましく、４／６～６／４が特に好ましい。 As the core-sheath composite ratio, the core / sheath ratio (mass ratio) is preferably 2/8 to 8/2, more preferably 3/7 to 7/3, and particularly preferably 4/6 to 6/4.
本発明の芯鞘複合短繊維の繊維長は、２０～７０ｍｍであり、紫外線防止性の観点から、２５～６０ｍｍが好ましく、３０～５２ｍｍがより好ましく、３５～４５ｍｍがよりいっそう好ましい。なお、繊維長はＪＩＳ Ｌ１０１５ ８．４．１Ａ法に基づき測定したものである。 The fiber length of the core-sheath composite staple fiber of the present invention is 20 to 70 mm, preferably 25 to 60 mm, more preferably 30 to 52 mm, and even more preferably 35 to 45 mm from the viewpoint of UV protection. The fiber length was measured based on the JIS L1015 8.4.1A method.
芯鞘複合短繊維の捲縮数は、５～２０ヶ／２５ｍｍであり、紫外線防止性の観点から、７～１８ヶ／２５ｍｍが好ましく、８～１６ヶ／２５ｍｍがより好ましく、８～１５ヶ／２５ｍｍがよりいっそう好ましい。 The number of crimps of the core-sheath composite staple fiber is 5 to 20/25 mm, preferably 7 to 18/25 mm, more preferably 8 to 16/25 mm, and 8 to 15 from the viewpoint of UV protection. / 25 mm is even more preferred.
捲縮数は、ＪＩＳ Ｌ １０１５ ８．１２．１に基づき測定するものとする。なお、捲縮数の測定において、繊維長が２５ｍｍより短い場合は、捲縮付与後、カット前の繊維を測定し、繊維長２５ｍｍあたりの個数に換算する。 The number of crimps shall be measured based on JIS L 1015 8.12.1. In the measurement of the number of crimps, if the fiber length is shorter than 25 mm, the fibers after crimping and before cutting are measured and converted into the number per fiber length of 25 mm.
芯鞘複合短繊維の捲縮率は、５～３０％であり、紫外線防止性の観点から、１０～２５％が好ましく、１２～２０％がより好ましく、１２～１８％がよりいっそう好ましい。 The crimp ratio of the core-sheath composite staple fiber is 5 to 30%, preferably 10 to 25%, more preferably 12 to 20%, and even more preferably 12 to 18% from the viewpoint of UV protection.
捲縮率は、ＪＩＳ Ｌ １０１５ ８．１２．２に基づき測定するものとする。なお、捲縮率の測定において、繊維長が２５ｍｍより短く測定困難な場合は、捲縮付与後、カット前の繊維の捲縮率を測定し、繊維長２５ｍｍあたりの個数に換算する。 The crimp ratio shall be measured based on JIS L 1015 8.12.2. If the fiber length is shorter than 25 mm and it is difficult to measure the crimp ratio, the crimp ratio of the fiber after the crimp is applied and before cutting is measured and converted into the number of fibers per 25 mm fiber length.
芯鞘複合短繊維の強度は、紡績時の工程通過性の観点から、１．５～７．０ｃＮ／ｄｔｅｘが好ましく、２．０～６．５ｃＮ／ｄｔｅｘがより好ましく、３．５～６．０ｃＮ／ｄｔｅｘがよりいっそう好ましく、４．０～６．０ｃＮ／ｄｔｅｘが特に好ましい。 The strength of the core-sheath composite staple fiber is preferably 1.5 to 7.0 cN / dtex, more preferably 2.0 to 6.5 cN / dtex, and 3.5 to 6. 0 cN / dtex is even more preferable, and 4.0 to 6.0 cN / dtex is particularly preferable.
本発明の芯鞘複合短繊維は、後述するように紫外線防止性に優れる。該理由は明らかではないが、無機酸化物微粒子量、捲縮数、捲縮率を特定のものとすることに加え、繊維形状を長繊維形状ではなく短繊維形状としているため、無機酸化物微粒子を大量に含有する芯部が短繊維の端部表面に多く存在することにより、意外にもそれが紫外線防止性の向上に効果を果たしているものと推測している。 The core-sheath composite staple fiber of the present invention is excellent in UV protection as described later. Although the reason is not clear, the amount of inorganic oxide fine particles, the number of crimps, and the crimp ratio are specified, and the fiber shape is not a long fiber shape but a short fiber shape, so that the inorganic oxide fine particles are formed. It is presumed that, surprisingly, it is effective in improving the ultraviolet protection property because a large amount of the core portion containing a large amount of the above is present on the surface of the end portion of the staple fiber.
本発明の紡績糸及び二層構造紡績糸は、前記ポリエステル芯鞘複合短繊維を含むことが必要である。紫外線防止性の観点から、紡績糸及び二層構造紡績糸中の前記ポリエステル芯鞘複合短繊維の含有率は、２０～１００質量％が好ましく、３０～９０質量％がより好ましく、４５～８０質量％がよりいっそう好ましく、６０～７５質量％が特に好ましい。 The spun yarn and the two-layer structure spun yarn of the present invention need to contain the polyester core-sheath composite staple fiber. From the viewpoint of UV protection, the content of the polyester core-sheath composite staple fibers in the spun yarn and the two-layer structure spun yarn is preferably 20 to 100% by mass, more preferably 30 to 90% by mass, and 45 to 80% by mass. % Is even more preferable, and 60 to 75% by mass is particularly preferable.
一般に、紫外線防止性を有する繊維の含有量が多いほど、得られる紡績糸の紫外線防止性能がより高いと予測できる。例えば、二層構造紡績糸において、芯部及び鞘部に同じ前記ポリエステル芯鞘複合短繊維（すなわち、該含有率が１００質量％）を用いるとポリエステル芯鞘複合短繊維からなる紡績糸と同様となるが、発明者らは、該紡績糸１００質量％よりも、他の繊維も含む二層構造紡績糸で構成される布帛の方が、意外にも紫外線防止効果が高いことを見出した。該理由は明らかではないが、二層構造紡績糸における前記ポリエステル芯鞘複合短繊維と他の繊維との絡み合いにより、紫外線防止効果が向上するものと推察される。 In general, it can be predicted that the higher the content of the fiber having UV protection, the higher the UV protection performance of the obtained spun yarn. For example, in a two-layer structure spun yarn, when the same polyester core-sheath composite short fiber (that is, the content is 100% by mass) is used for the core portion and the sheath portion, it is the same as the spun yarn made of polyester core-sheath composite short fiber. However, the inventors have found that a fabric composed of a two-layer structure spun yarn containing other fibers has a surprisingly higher UV protection effect than 100% by mass of the spun yarn. Although the reason is not clear, it is presumed that the UV protection effect is improved by the entanglement of the polyester core-sheath composite staple fibers with other fibers in the two-layer structure spun yarn.
二層構造紡績糸における前記ポリエステル芯鞘複合短繊維以外の繊維としては、特に限定されないが、例えば、通常のポリエステル繊維、ナイロン繊維、ビニロン繊維、水溶性ビニロン繊維などの化学繊維、綿や麻、毛、絹などの天然繊維などが挙げられ、紫外線防止性の観点から、特に綿が好ましい。 The fibers other than the polyester core-sheath composite short fibers in the two-layer structure spun yarn are not particularly limited, and are, for example, ordinary polyester fibers, nylon fibers, vinylon fibers, chemical fibers such as water-soluble vinylon fibers, cotton and linen, and the like. Examples thereof include natural fibers such as hair and silk, and cotton is particularly preferable from the viewpoint of UV protection.
本発明の二層構造紡績糸における芯鞘複合比率としては、紫外線防止性の観点から、芯／鞘比（質量比）で、１０／９０～５０／５０が好ましく、２０／８０～４０／６０がより好ましく、２５／７５～３５／６５が特に好ましい。 The core-sheath composite ratio in the two-layer structure spun yarn of the present invention is preferably 10/90 to 50/50, preferably 20/80 to 40/60 in terms of core / sheath ratio (mass ratio) from the viewpoint of UV protection. Is more preferable, and 25/75 to 35/65 is particularly preferable.
本発明の二層構造紡績糸においては、前記ポリエステル芯鞘複合短繊維は、二層構造紡績糸の芯側または鞘側のいずれに存在してもかまわないが、紫外線防止性の観点から、鞘側に前記ポリエステル芯鞘複合短繊維が存在することが好ましく、芯側に綿、鞘側に前記ポリエステル芯鞘複合短繊維が存在することが特に好ましい。 In the two-layer structure spun yarn of the present invention, the polyester core-sheath composite short fiber may be present on either the core side or the sheath side of the two-layer structure spun yarn, but from the viewpoint of UV protection, the sheath may be present. It is preferable that the polyester core-sheath composite short fiber is present on the side, and it is particularly preferable that the polyester core-sheath composite short fiber is present on the core side and the sheath side.
本発明の二層構造紡績糸は、前記ポリエステル芯鞘複合短繊維を含むことから紫外線防止性に優れる。さらには、後述するように、鞘部に前記芯鞘複合短繊維を含むことにより、よりいっそう紫外線防止性が向上する。該理由は明らかではないが、特定の芯鞘複合短繊維を含むだけでなく、鞘部に存在することにより、二層構造紡績糸表面に該短繊維の端部表面が多く存在することにより、意外にもそれが紫外線防止性の向上に効果を果たしているものと推測している。 The two-layer structure spun yarn of the present invention is excellent in UV protection because it contains the polyester core-sheath composite staple fibers. Furthermore, as will be described later, by including the core-sheath composite staple fibers in the sheath portion, the ultraviolet protection property is further improved. Although the reason is not clear, not only does it contain a specific core-sheath composite staple fiber, but it is also present in the sheath portion, so that the surface of the end portion of the short fiber is present on the surface of the two-layer structure spun yarn. Surprisingly, it is speculated that it is effective in improving the UV protection.
本発明の布帛は、ポリエステル芯鞘複合短繊維、紡績糸及び／または二層構造紡績糸を含むが、必要に応じて他の糸条を含むこともできる。他の糸条としては特に限定されず、用途に応じて適宜設定が可能だが、例えば、通常のポリエステル繊維、ナイロン繊維、ビニロン繊維、水溶性ビニロン繊維などの化学繊維、綿や麻、毛、絹などの天然繊維などが挙げられる。具体的には、合撚、混繊、引揃え、配列、交織、交編するなどして併用すればよい。 The fabric of the present invention includes polyester core-sheath composite staples, spun yarns and / or double-layered spun yarns, but may also contain other yarns if desired. The other threads are not particularly limited and can be appropriately set according to the application. For example, ordinary polyester fibers, nylon fibers, vinylon fibers, chemical fibers such as water-soluble vinylon fibers, cotton, linen, hair, and silk. Natural fibers such as. Specifically, it may be used in combination by twisting, blending, aligning, arranging, weaving, and knitting.
他の糸条を併用する場合、本発明のポリエステル芯鞘複合短繊維、紡績糸及び／または二層構造紡績糸の混用比率としては、紫外線防止性の観点から、布帛１００質量％に対して５０質量％以上とすることが好ましく、６０質量％以上がより好ましく、７０質量％以上がよりいっそう好ましく、８０質量％以上が特に好ましい。 When other yarns are used in combination, the mixing ratio of the polyester core-sheath composite short fiber, the spun yarn and / or the two-layer structure spun yarn of the present invention is 50 to 100% by mass of the fabric from the viewpoint of UV protection. It is preferably 5% by mass or more, more preferably 60% by mass or more, further preferably 70% by mass or more, and particularly preferably 80% by mass or more.
本発明の布帛は、織物の形態としては、平織、綾織、朱子織、あるいはそれらの派生的組織も含むあらゆる組織が適用可能であり、また、編物の形態としても同様に、丸編み、横編み、タック編み等の緯編み、ラッセル、トリコット等の経編み等あらゆる組織が適用可能である。 The fabric of the present invention can be applied to any structure including plain weave, twill weave, satin weave, or a derivative structure thereof as the form of the woven fabric, and similarly, circular knitting and weft knitting as the form of the knitted fabric. , Weft knitting such as tack knitting, warp knitting such as Russell and tricot, etc. can be applied.
本発明の布帛が織物の場合、カバーファクター（ＣＦ）は１０００～３５００の範囲内であることが好ましく、１５００～２５００であることがより好ましい。また、本発明の布帛が編物の場合、ＣＦは５００～２５００の範囲内であることが好ましく、８００～１８００であることがより好ましい。ここで、カバーファクター（ＣＦ）とは、織物の場合は下記式（ＩＩ）によって算出され、編物の場合は下記式（ＩＩＩ）によって算出されるものである。 When the fabric of the present invention is a woven fabric, the cover factor (CF) is preferably in the range of 1000 to 3500, and more preferably 1500 to 2500. When the fabric of the present invention is a knitted fabric, the CF is preferably in the range of 500 to 2500, more preferably 800 to 1800. Here, the cover factor (CF) is calculated by the following formula (II) in the case of a woven fabric and by the following formula (III) in the case of a knitted fabric.
上記式中の略語は、以下のものを示す。
ＤＴ：糸の繊度（ｄｔｅｘ）
ＷＡＤ：経糸密度（本／２．５４ｃｍ）
ＷＥＤ：緯糸密度（本／２．５４ｃｍ）
ＣＤ：コース密度（本／２．５４ｃｍ）
ＷＤ：ウェール密度（本／２．５４ｃｍ）
The abbreviations in the above formula indicate the following.
DT: Thread fineness (dtex)
WAD: Warp density (book / 2.54 cm)
WED: Weft density (book / 2.54 cm)
CD: Course density (book / 2.54 cm)
WD: Wale density (book / 2.54 cm)
なお、糸の繊度は、織物の場合ＪＩＳ Ｌ １０９６：２０１０ ８．９．９．１．ａのＡ法、編物の場合ＪＩＳ Ｌ １０９６：２０１０ ８．９．９．１．ｂに従い測定、算出するものとする。経糸密度及び緯糸密度は、ＪＩＳ Ｌ １０９６：２０１０ ８．６．１Ａ法、コース密度、ウェール密度はＪＩＳ Ｌ １０９６：２０１０ ８．６．２に従い測定、算出するものとする。 In the case of woven fabric, the fineness of the thread is JIS L 1096: 2010 8.99.1. Method A of a, in the case of knitting JIS L 1096: 2010 8.99.1. It shall be measured and calculated according to b. The warp and weft density shall be measured and calculated according to the JIS L 1096: 2010 8.6.1A method, and the course density and wale density shall be measured and calculated according to JIS L 1096: 2010 8.6.2.
本発明の布帛の目付けは、紫外線防止性の観点から、織物としては、１００～３００ｇ／ｍ２が好ましく、１５０～２８０ｇ／ｍ２がより好ましく、編物としては、１００～２５０ｇ／ｍ２が好ましく、１２０～２００ｇ／ｍ２がより好ましい。 From the viewpoint of UV protection, the texture of the fabric of the present invention is preferably 100 to 300 g / m 2 as a woven fabric, more preferably 150 to 280 g / m 2 , and 100 to 250 g / m 2 as a knitted fabric. , 120-200 g / m 2 is more preferred.
本発明の布帛の厚みは、紫外線防止性の観点から、織物としては、０．２～０．８ｍｍが好ましく、０．３～０．７ｍｍがより好ましく、編物としては、０．２～０．８ｍｍが好ましく、０．３～０．７ｍｍがより好ましく、０．５～０．７ｍｍが特に好ましい。 The thickness of the fabric of the present invention is preferably 0.2 to 0.8 mm, more preferably 0.3 to 0.7 mm for the woven fabric, and 0.2 to 0 mm for the knitted fabric, from the viewpoint of UV protection. 8 mm is preferable, 0.3 to 0.7 mm is more preferable, and 0.5 to 0.7 mm is particularly preferable.
本発明の布帛の紫外線防止指数は、２０以上であることが好ましく、３０以上であることがより好ましく、４０以上であることがよりいっそう好ましく、５０以上であることが特に好ましい。該紫外線防止指数を所定以上とするためには、前記ポリエステル芯鞘複合繊維、前記紡績糸、及び／または前記二層構造紡績糸中の無機酸化物微粒子量や、布帛におけるポリエステル芯鞘複合繊維、紡績糸、及び／または二層構造紡績糸自体の量を増やすほか、前記二層構造紡績糸の鞘部に前記ポリエステル芯鞘複合繊維を配したり、さらに芯部に綿を配すること等により可能となる。 The UV protection index of the fabric of the present invention is preferably 20 or more, more preferably 30 or more, even more preferably 40 or more, and particularly preferably 50 or more. In order to make the ultraviolet protection index equal to or higher than a predetermined value, the amount of inorganic oxide fine particles in the polyester core-sheath composite fiber, the spun yarn, and / or the two-layer structure spun yarn, and the polyester core-sheath composite fiber in the fabric, In addition to increasing the amount of the spun yarn and / or the two-layer structure spun yarn itself, by arranging the polyester core-sheath composite fiber in the sheath portion of the two-layer structure spun yarn, and further arranging cotton in the core portion, etc. It will be possible.
本発明の紫外線防止指数（ＵＰＦ）とは、オーストラリアニュージーランド規格（ＡＳ／ＮＺＳ；４３９９：１９９６）に従い、分光光度計を用いて測定した２８０～４００ｎｍの紫外線透過率に所定のダメージ係数を考慮し、算出するものである。なお、通常ＵＰＦの数値が２０以上であれば「ｇｏｏｄｐｒｏｔｅｃｔｉｏｎ」以上の等級となり好ましいといえるが、本発明においては、特に二層構造紡績糸において芯部に綿、鞘部に前記芯鞘複合短繊維を用いることにより、より高い紫外線防止指数、つまり４０以上を達成することができる。 The UV protection index (UPF) of the present invention is a UV transmittance of 280 to 400 nm measured using a spectrophotometer in accordance with the Australian New Zealand standard (AS / NZS; 4399: 1996), taking into account a predetermined damage coefficient. It is to be calculated. Normally, if the value of UPF is 20 or more, it can be said that the grade is "good projection" or higher, which is preferable. A higher UV protection index, i.e. 40 or higher, can be achieved by using.
本発明のポリエステル芯鞘複合短繊維、二層構造紡績糸、布帛の製造方法について以下に説明する。 The method for producing the polyester core-sheath composite staple fiber, the two-layer structure spun yarn, and the fabric of the present invention will be described below.
本発明のポリエステル芯鞘複合短繊維の製造方法は、通常の短繊維の製造方法を用いることができる。具体的には、例えば、酸化チタン微粒子を所定量含有するポリエステル樹脂をそれぞれ通常の溶融紡糸装置に供給して芯鞘複合繊維の溶融紡糸を行う。紡出糸条を冷却固化した後、一旦容器へ収納する。そして、この糸条を集束して糸条束とし、ローラ間で延伸倍率２～４倍程度で延伸を施す。続いて１００～１２０℃で熱処理し、次いで仕上げ油剤を付与後、スタフィングボックス等で機械捲縮を付与し、目的とする繊維長にカットしてポリエステル芯鞘複合短繊維を得ることができる。 As the method for producing the polyester core-sheath composite staple fiber of the present invention, a usual method for producing short fibers can be used. Specifically, for example, a polyester resin containing a predetermined amount of titanium oxide fine particles is supplied to a normal melt spinning apparatus to perform melt spinning of core-sheath composite fibers. After the spun yarn is cooled and solidified, it is temporarily stored in a container. Then, the yarns are bundled into a yarn bundle, and the yarns are stretched between the rollers at a draw ratio of about 2 to 4 times. Subsequently, heat treatment is performed at 100 to 120 ° C., then a finishing oil is applied, and then mechanical crimping is applied with a stuffing box or the like, and the fibers are cut to a desired fiber length to obtain polyester core-sheath composite staple fibers.
本発明の二層構造紡績糸の製造方法は、通常の二層構造紡績糸の製造方法を用いることができる。具体的には、前記ポリエステル芯鞘複合短繊維からなる粗糸と、その他短繊維からなる粗糸とを用意し、一方を芯側に他方を鞘側に配しながら同時に精紡するか、又は前記ポリエステル芯鞘複合短繊維からなるスライバーと、その他短繊維からなるスライバーとを用意し、一方を芯側に他方を鞘側に配しながら同時に粗紡することで複合粗糸を得、後にこの複合粗糸を精紡することにより、製造することができる。 As the method for producing a two-layer structure spun yarn of the present invention, a normal method for producing a two-layer structure spun yarn can be used. Specifically, a blister yarn made of the polyester core-sheath composite short fiber and a blister yarn made of other short fibers are prepared and spun at the same time while arranging one on the core side and the other on the sheath side. A sliver made of the polyester core-sheath composite short fiber and a sliver made of the other short fibers are prepared, and a composite blister yarn is obtained by arranging one on the core side and the other on the sheath side at the same time to obtain a composite blister yarn. It can be manufactured by spinning the blister yarn.
ここで先に例示した製法について詳しく述べると、前者の方法では、まず、一連の紡績工程によりそれぞれの粗糸を作製する。このとき、各々の粗糸には、本発明の効果を損なわない範囲で、前記ポリエステル芯鞘複合短繊維以外の短繊維が含まれていてもよい。続いてリング精紡機に各粗糸を導入し、芯側より鞘側の送出量を大きくしながら精紡する。このとき、各粗糸を同一ドラフト域に並行に導入する。導入すべき粗糸としては、基本的に芯側、鞘側それぞれ１本ずつでよいが、紡績糸の被覆性を高める観点から、複数の鞘側粗糸を用いて１本の芯側粗糸を覆うという方法も採用できる。 Here, the manufacturing method exemplified above will be described in detail. In the former method, first, each blister yarn is produced by a series of spinning steps. At this time, each blister yarn may contain short fibers other than the polyester core-sheath composite staple fibers as long as the effects of the present invention are not impaired. Subsequently, each blister yarn is introduced into a ring spinning machine, and spinning is performed while increasing the delivery amount on the sheath side from the core side. At this time, each blister yarn is introduced in the same draft area in parallel. As the blister yarn to be introduced, basically one core side and one sheath side may be used, but from the viewpoint of improving the covering property of the spun yarn, one core side blister yarn is used by using a plurality of sheath side blister yarns. You can also adopt the method of covering.
一方、後者の方法でも、まず、一連の紡績工程によりそれぞれのスライバーを作製する。スライバーには、効果を損なわない範囲で前記ポリエステル芯鞘複合短繊維以外の短繊維が含まれていてもよい。次いで、粗紡機に各スライバーを導入する。このとき、各スライバーを同一ドラフト域に並行に導入すると同時に、芯側スライバーをフライヤーヘッドから見てドラフト域の外側に、鞘側スライバーを内側に導入する。そして、芯側スライバーにおけるドラフト軸方向（ただし、糸進行方向）と、芯側スライバーのフロントローラー最終ニップ点とフライヤーヘッドとを結ぶ線（ただし、糸進行方向）とのなす角度が、水平面に投影した際に好ましくは０～６０°の範囲を満足するように設定する。さらに、好ましくは鞘側スライバーを芯側スライバーより速い速度で供給することで、鞘側をやや弛ませる一方で芯側をやや張った状態にする。こうすることで、フライヤーの回転による撚りが芯側スライバーへ集中的に伝播される結果、鞘側スライバーを芯側スライバーに巻き付けることができる。複合粗糸を得た後は、公知の精紡機を用いて紡出すれば、目的の二層構造紡績糸を得ることができる。 On the other hand, also in the latter method, first, each sliver is produced by a series of spinning steps. The sliver may contain short fibers other than the polyester core-sheath composite staple fibers as long as the effect is not impaired. Then, each sliver is introduced into the mashing machine. At this time, each sliver is introduced in parallel in the same draft area, and at the same time, the core side sliver is introduced outside the draft area and the sheath side sliver is introduced inside when viewed from the flyer head. Then, the angle formed by the draft axis direction (however, the thread traveling direction) of the core side sliver and the line connecting the front roller final nip point of the core side sliver and the fryer head (however, the thread traveling direction) is projected on the horizontal plane. When this is done, it is preferably set so as to satisfy the range of 0 to 60 °. Further, preferably, by supplying the sheath side sliver at a speed higher than that of the core side sliver, the sheath side is slightly loosened while the core side is slightly stretched. By doing so, the twist due to the rotation of the fryer is intensively propagated to the core side sliver, and as a result, the sheath side sliver can be wound around the core side sliver. After obtaining the composite blister yarn, the desired two-layer structure spun yarn can be obtained by spinning using a known spinning frame.
本発明の布帛の製造方法は、公知の織機、編機を用いることができ、用途に応じて、布帛の組織、密度を適宜設定すればよい。 As a method for producing a fabric of the present invention, a known weaving machine or knitting machine can be used, and the texture and density of the fabric may be appropriately set according to the intended use.
次に、本発明を実施例、比較例によってさらに具体的に説明する。 Next, the present invention will be described in more detail with reference to Examples and Comparative Examples.
＜実施例１＞
粒径０．２５μｍの酸化チタン微粒子を５質量％添加したポリエチレンテレフタレートを芯成分とし、粒径０．２５μｍの酸化チタン微粒子を０．４質量％添加したポリエチレンテレフタレートを鞘成分とし、２相のエクストルーダーからなる芯鞘型複合紡糸機を使用し、芯鞘比率（質量比）を５０：５０として複合紡糸を行い、紡糸速度８００ｍ／分で未延伸糸を得た。この未延伸糸を集束して１１万ｄｔｅｘのトウ状にした未延伸繊維に、延伸倍率３．２倍、延伸温度４０℃で延伸を行い、この後、ヒートドラム（温度１１０℃）で熱処理を施した。次いで、押し込み式クリンパーで捲縮を付与し、繊維長３８ｍｍに切断して、単糸繊度１．３ｄｔｅｘ、強度４．８ｃＮ／ｄｔｅｘ、捲縮数１１．３ヶ／２５ｍｍ、捲縮率１０．５％のポリエステル芯鞘複合短繊維を得た。
<Example 1>
Two-phase ext Using a core-sheath type composite spinning machine made of ruder, composite spinning was performed with a core-sheath ratio (mass ratio) of 50:50, and undrawn yarn was obtained at a spinning speed of 800 m / min. The undrawn fibers that have been focused and made into a tow shape of 110,000 dtex are drawn at a draw ratio of 3.2 times and a drawing temperature of 40 ° C., and then heat-treated with a heat drum (temperature 110 ° C.). provided. Next, crimping was applied with a push-in crimper, and the fiber was cut to a fiber length of 38 mm to have a single yarn fineness of 1.3 dtex, a strength of 4.8 cN / dtex, a crimp number of 11.3 / 25 mm, and a crimp ratio of 10.5. % Polyester core-sheath composite staples were obtained.
次に、芯部をなすスライバーに綿（繊度１．２ｄｔｅｘ、繊維長３３ｍｍ）を、鞘部をなすスライバーに前記ポリエステル芯鞘複合短繊維を用い、芯鞘質量比（芯／鞘）３０／７０にて、粗紡、精紡を経て、本発明の二層構造紡績糸（４０／１番手）を得た。得られた二層構造紡績糸は、前記ポリエステル芯鞘複合短繊維で綿が均一に被覆されていた。 Next, cotton (fineness 1.2 dtex, fiber length 33 mm) is used for the sliver forming the core, and the polyester core-sheath composite staple fiber is used for the sliver forming the sheath, and the core-sheath mass ratio (core / sheath) 30/70. The two-layer structure spun yarn (40/1 count) of the present invention was obtained through rough spinning and spinning. The obtained two-layer structure spun yarn was uniformly covered with cotton with the polyester core-sheath composite staple fibers.
前記二層構造紡績糸を用いて、釜径が１６インチ、針密度１８ゲージのフライス編機を用いて、図２に示すフライス組織の生機を得た。そして、得られた生機を、プレセット、精練・リラックス、仕上げセットを行ないフライス編地を得た。前述の方法により、得られた編地の紫外線防止指数を評価した。 Using the two-layer structure spun yarn, a milling machine having a pot diameter of 16 inches and a needle density of 18 gauge was used to obtain a milling machine having a milling structure shown in FIG. Then, the obtained raw machine was preset, refined / relaxed, and finished set to obtain a milling knitted fabric. The UV protection index of the obtained knitted fabric was evaluated by the above-mentioned method.
＜実施例２＞
芯部をなすスライバーに実施例１で使用した芯鞘複合短繊維を、鞘部をなすスライバーに実施例１で使用した綿を用い、芯鞘質量比（芯／鞘）４０／６０で用意し、粗紡、精紡を経て、本発明の二層構造紡績糸（４０／１番手）を得た。得られた二層構造紡績糸は、綿で前記ポリエステル芯鞘複合短繊維が均一に被覆されていた。
<Example 2>
The core-sheath composite staple fiber used in Example 1 was used for the sliver forming the core, and the cotton used in Example 1 was used for the sliver forming the sheath, and the core-sheath mass ratio (core / sheath) was 40/60. The two-layer structure spun yarn (40/1 count) of the present invention was obtained through rough spinning and spinning. The obtained two-layer structure spun yarn was uniformly coated with the polyester core-sheath composite staple fibers with cotton.
得られた二層構造紡績糸を用いて、実施例１と同様にして、フライス組織の生機を得た。そして、得られた生機を実施例１と同様にしてフライス編地を得た。前述の方法により、得られた編地の紫外線防止指数を評価した。 Using the obtained two-layer structure spun yarn, a milling cutter was obtained in the same manner as in Example 1. Then, the obtained raw machine was used in the same manner as in Example 1 to obtain a milling cutter. The UV protection index of the obtained knitted fabric was evaluated by the above-mentioned method.
＜参考例１＞
実施例１で使用した芯鞘複合短繊維を用い、粗紡、精紡を経て、本発明の紡績糸（４０
／１番手）を得た。得られた紡績糸を用い、実施例１と同様にして、フライス組織の生機
を得た。そして、得られた生機を実施例１と同様にしてフライス編地を得た。前述の方法
により、得られた編地の紫外線防止指数を評価した。
< Reference example 1 >
Using the core-sheath composite staple fiber used in Example 1, the spun yarn (40) of the present invention was subjected to rough spinning and fine spinning.
/ 1st place) was obtained. Using the obtained spun yarn, a milling cutter was obtained in the same manner as in Example 1. Then, the obtained raw machine was used in the same manner as in Example 1 to obtain a milling cutter. The UV protection index of the obtained knitted fabric was evaluated by the above-mentioned method.
＜比較例１＞
実施例１で使用した綿を用い、粗紡、精紡を経て、本発明の紡績糸（４０／１番手）を得た。得られた紡績糸を用い、実施例１と同様にして、フライス組織の生機を得た。そして、得られた生機を実施例１と同様にしてフライス編地を得た。前述の方法により、得られた編地の紫外線防止指数を評価した。
<Comparative Example 1>
Using the cotton used in Example 1, the spun yarn (40/1 count) of the present invention was obtained through rough spinning and spinning. Using the obtained spun yarn, a milling cutter was obtained in the same manner as in Example 1. Then, the obtained raw machine was used in the same manner as in Example 1 to obtain a milling cutter. The UV protection index of the obtained knitted fabric was evaluated by the above-mentioned method.
＜比較例２＞
粒径０．２５μｍの酸化チタン微粒子を０．４質量％含有するポリエチレンテレフタレート樹脂を溶融紡糸し、紡糸速度８００ｍ／分で未延伸糸を得た。この未延伸糸を集束して１１万ｄｔｅｘのトウ状にした未延伸繊維に、延伸倍率３．２倍、延伸温度４０℃で延伸を行い、この後、ヒートドラム（温度１１０℃）で熱処理を施した。次いで、押し込み式クリンパーで捲縮を付与し、繊維長３８ｍｍに切断して、単糸繊度１．３ｄｔｅｘ、強度４．８ｃＮ／ｄｔｅｘ、捲縮数１１．３ヶ／２５ｍｍ、捲縮率１０．５％のポリエステル短繊維を得た。得られたポリエステル短繊維を用い、粗紡、精紡を経て、紡績糸（４０／１番手）を得た。得られた紡績糸を用い、実施例１と同様にして、フライス組織の生機を得た。そして、得られた生機を実施例１と同様にしてフライス編地を得た。前述の方法により、得られた編地の紫外線防止指数を評価した。
<Comparative Example 2>
A polyethylene terephthalate resin containing 0.4% by mass of titanium oxide fine particles having a particle size of 0.25 μm was melt-spun to obtain undrawn yarn at a spinning speed of 800 m / min. The undrawn fibers that have been focused and made into a tow shape of 110,000 dtex are drawn at a draw ratio of 3.2 times and a drawing temperature of 40 ° C., and then heat-treated with a heat drum (temperature 110 ° C.). provided. Next, crimping was applied with a push-in crimper, and the fiber was cut to a fiber length of 38 mm to have a single yarn fineness of 1.3 dtex, a strength of 4.8 cN / dtex, a crimp number of 11.3 / 25 mm, and a crimp ratio of 10.5. % Polyester staples were obtained. Using the obtained polyester staple fibers, spun yarn (40/1 count) was obtained through rough spinning and fine spinning. Using the obtained spun yarn, a milling cutter was obtained in the same manner as in Example 1. Then, the obtained raw machine was used in the same manner as in Example 1 to obtain a milling cutter. The UV protection index of the obtained knitted fabric was evaluated by the above-mentioned method.
＜比較例３＞
芯部をなすスライバーに比較例２で使用したポリエステル短繊維を、鞘部をなすスライバーに実施例１で使用した綿を用い、芯鞘質量比（芯／鞘）４０／６０で用意し、粗紡、精紡を経て、二層構造紡績糸（４０／１番手）を得た。得られた二層構造紡績糸は、綿で前記ポリエステル短繊維が均一に被覆されていた。
<Comparative Example 3>
The polyester staple fiber used in Comparative Example 2 was used for the sliver forming the core, and the cotton used in Example 1 was used for the sliver forming the sheath, and the core-sheath mass ratio (core / sheath) was 40/60. , A two-layer structure spun yarn (40/1 count) was obtained through spinning. The obtained two-layer structure spun yarn was uniformly covered with the polyester staple fibers with cotton.
得られた二層構造紡績糸を用いて、実施例１と同様にして、フライス組織の生機を得た。そして、得られた生機を実施例１と同様にしてフライス編地を得た。前述の方法により、得られた編地の紫外線防止指数を評価した。 Using the obtained two-layer structure spun yarn, a milling cutter was obtained in the same manner as in Example 1. Then, the obtained raw machine was used in the same manner as in Example 1 to obtain a milling cutter. The UV protection index of the obtained knitted fabric was evaluated by the above-mentioned method.
得られた芯鞘複合短繊維、二層構造紡績糸（複重層糸と略す場合がある）、布帛及び評価結果を表１に示す。 Table 1 shows the obtained core-sheath composite staple fibers, double-layer structure spun yarn (sometimes abbreviated as double-layer yarn), fabric, and evaluation results.
表１に示すように、実施例１、２にて得られたポリエステル芯鞘複合短繊維、二層構造紡績糸を含む布帛は、優れた紫外線防止性能を示すものであった。特に、芯成分として綿を、鞘成分として前記ポリエステル芯鞘複合短繊維を用いた二層構造紡績糸を含む実施例１の布帛は、前記ポリエステル芯鞘複合短繊維紡績糸のみからなる参考例１に比べ、前記ポリエステル芯鞘複合短繊維の混用比率が少ないにもかかわらず、紫外線防止指数が５０＋と非常に優れたものであった。 As shown in Table 1, the fabric containing the polyester core-sheath composite staple fibers and the two-layer structure spun yarn obtained in Examples 1 and 2 exhibited excellent UV protection performance. In particular, the fabric of Example 1 containing a two-layer structure spun yarn using cotton as a core component and the polyester core-sheath composite short fiber as a sheath component is Reference Example 1 composed of only the polyester core-sheath composite short fiber spun yarn. Although the mixing ratio of the polyester core-sheath composite short fibers was small, the ultraviolet protection index was 50+, which was extremely excellent.
一方、比較例１にて得られた綿紡績糸のみからなる布帛、比較例２にて得られた酸化チタン微粒子含有量が０．４質量％のポリエステル短繊維のみからなる布帛、並びに比較例３にて得られた酸化チタン微粒子含有量が０．４質量％のポリエステル短繊維を芯に、綿を鞘に用いた二層構造紡績糸からなる布帛は、いずれも紫外線防止指数が２０未満であった。 On the other hand, the cloth made of only cotton spun yarn obtained in Comparative Example 1, the cloth made of only polyester staple fibers having a titanium oxide fine particle content of 0.4% by mass obtained in Comparative Example 2, and Comparative Example 3 All of the fabrics made of two-layer structure spun yarn using polyester staple fibers having a titanium oxide fine particle content of 0.4% by mass as a core and cotton as a sheath have an ultraviolet protection index of less than 20. rice field.
Ａ 編糸
Ｂ シリンダー針
Ｃダイヤル針
A knitting yarn B cylinder needle C dial needle
Claims (3)
（１）前記短繊維の繊維長が２０～７０ｍｍ。
（２）前記短繊維の捲縮数が５～２０ヶ／２５ｍｍ。
（３）前記短繊維の捲縮率が５～３０％。
（４）二層構造紡績糸の芯部と鞘部の芯／鞘比（質量比）が１０／９０～５０／５０。
（５）二層構造紡績糸中の前記短繊維の含有率が３０～９０質量％。 A two-layer structure containing polyester core-sheath composite short fibers containing 3 to 15% by mass of inorganic oxide fine particles in the polyester forming the core component and 0 to 1% by mass of the inorganic oxide fine particles in the polyester forming the sheath component. A two-layer structure spun yarn , wherein the short fibers satisfy the following (1) to (3), and the two-layer structure spun yarn satisfies the following (4) to (5). ..
(1) The fiber length of the staple fiber is 20 to 70 mm.
(2) The number of crimps of the staple fibers is 5 to 20/25 mm.
(3) The crimp ratio of the staple fibers is 5 to 30%.
(4) The core / sheath ratio (mass ratio) of the core and the sheath of the two-layer structure spun yarn is 10/90 to 50/50.
(5) The content of the short fibers in the two-layer structure spun yarn is 30 to 90% by mass.
The fabric according to claim 2 , which has an ultraviolet protection index (UPF) of 20 or more.
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| JP2009197339A (en) | 2008-02-19 | 2009-09-03 | Toray Ind Inc | Polyester staple fiber |
| JP2012107372A (en) | 2010-10-22 | 2012-06-07 | Toray Ind Inc | Yarn and woven textile using the same |
| JP6270427B2 (en) | 2013-11-21 | 2018-01-31 | ユニチカトレーディング株式会社 | Double-layer spun yarn, woven and knitted fabric, and method for producing woven and knitted fabric |
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| JP2009197339A (en) | 2008-02-19 | 2009-09-03 | Toray Ind Inc | Polyester staple fiber |
| JP2012107372A (en) | 2010-10-22 | 2012-06-07 | Toray Ind Inc | Yarn and woven textile using the same |
| JP6270427B2 (en) | 2013-11-21 | 2018-01-31 | ユニチカトレーディング株式会社 | Double-layer spun yarn, woven and knitted fabric, and method for producing woven and knitted fabric |
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