【考案の詳細な説明】[Detailed explanation of the idea]
〔産業上の利用分野〕
本考案は異なつた特性をもつた複数の綿繊維が
二層構造をなした紡績糸に関する。
〔従来の技術〕
従来、綿紡績糸といえば特性の異なる複数の原
綿とランダムに混綿したものが一般的であつた。
又、コアヤーンの場合にはシース・コア構造が汎
用的で、シース用繊維とコア用繊維とは原料繊維
を異にする、例えば綿とポリエステルという異繊
維の組合せ素材であつた。前者の単一素材では剛
性或は柔性のいずれかの特性をもつ製品にかたよ
り、剛性及び柔性の双方の特性をもつためには、
後者のように二種以上の繊維をコア・ヤーン或は
ランダム混紡しなければならなかつた。
又、紡績糸の構造に関し、二層構造綿糸の公知
文献として繊維機械学会誌のVOL、34，No.8P48
〜P56 1981「糸構造とリング精紡条件の相互関
係」には各種構造の二層構造糸が紹介されてい
る。しかし、この文献は単に紡績糸構造解析の為
にモデル試料として２種の繊維を用いて製造条件
から糸構造を解析した学術資料であることから本
願の目的とは、全く関係はない。
〔考案が解決しようとする問題点〕
本考案はかかる従来にない特性を有する綿糸、
即ち剛性（ハリや腰）及び柔性（風あい、肌ざわ
り）に富む二層構造綿糸を提供しようとするもの
である。
〔問題点を解決するための手段〕
綿糸の特性は、その綿糸の構成する原料の質及
び糸の撚数に関係することは一般的に知られてい
る。即ち、原料面でフアイバーの繊度が小さいと
手触りの柔かい特性を持ち、繊度が大きいと硬い
風あいの綿糸となる。
本考案は腰が強く、手触りの柔かいという従来
製品では相反する性質を共有する綿糸を得るため
に、第１図に示すように綿糸の横断面において中
央の芯糸部分に繊度の大きい太繊度原綿１を集
め、周辺の外層部に繊度の小さい細繊度原綿２を
構成した綿糸である。
マイクローネヤ繊度（以下、繊度という）の
種々異なる原綿での研究で、糸の芯部に繊度5.0
以下の原綿を使用した場合には、糸の外層部にい
ずれの繊度の原綿を使用しても糸の剛性即ち腰の
ある満足な二層構造綿糸は得られなかつた。又、
糸の外層部に繊維4.0以上の原綿を使用した場合
には、糸の芯部にいずれの繊度の原綿を使用して
も柔性即ち肌ざわりのソフトな満足する二層構造
綿糸は得られなかつた。
以上の結果から、手触りが柔かく、腰が強い特
性をもつ最も適切な風あいの二層構造綿糸は、糸
の芯部に繊度5.0以上、外層部に繊度4.0以下の原
綿を配したものになつた。
〔実施例〕
芯部の原綿に繊度5.2のペルー綿、外層部の原
綿に繊度3.8のエジプト綿を使用し、第１図に示
すように太繊度原綿１比率を全量の約30％、細繊
度原綿２を全量の約70％とし、粗紡工程で太繊度
原綿を芯部に、細繊度原綿を周辺外層部に配し、
二層構造綿粗糸が得られた。次いで、上記粗糸を
精紡工程を経て二層構造綿糸を得た。
この二層構造綿糸の特性を測定するために天竺
編地（シンカー台丸編機、24ゲージ）を製編し、
その結果を比較例と共に第１表に示す。
表に示す結果から総合すると、比較例１，２及
び３はいずれも一長一短であるが、実施例は風あ
いの両特性に満足できるものであつた。
[Industrial Application Field] The present invention relates to a spun yarn having a two-layer structure of a plurality of cotton fibers having different characteristics. [Prior Art] Conventionally, spun cotton yarn has generally been a yarn randomly mixed with a plurality of raw cottons having different properties.
In addition, in the case of core yarn, a sheath/core structure is commonly used, and the sheath fiber and the core fiber are made of different raw material fibers, for example, a combination of different fibers such as cotton and polyester. The former single material tends to produce products that have either rigidity or flexibility, but in order to have both rigidity and flexibility, it is necessary to
In the latter case, two or more types of fibers had to be spun into a core yarn or randomly blended. Regarding the structure of spun yarn, a known document on double-layered cotton yarn is the Journal of the Textile Machinery Society, VOL, 34, No. 8P48.
~P56 1981 ``Interrelationship between yarn structure and ring spinning conditions'' introduces two-layer yarns with various structures. However, this document is simply an academic document in which the yarn structure was analyzed from the manufacturing conditions using two types of fibers as model samples for the purpose of analyzing the spun yarn structure, so it is completely unrelated to the purpose of the present application. [Problems to be solved by the invention] The invention provides cotton yarn with such unprecedented characteristics,
That is, the aim is to provide a double-layered cotton yarn that is rich in rigidity (firmness and elasticity) and softness (breathiness and texture). [Means for Solving the Problems] It is generally known that the characteristics of cotton yarn are related to the quality of the raw material of which the cotton yarn is made and the number of twists of the yarn. That is, in terms of raw materials, if the fineness of the fiber is small, it will have a soft feel, and if the fineness is large, it will be a cotton yarn with a stiff feel. In order to obtain a cotton yarn that has strong elasticity and a soft touch, which are contradictory to conventional products, the present invention has been developed using thick raw cotton with a large fineness in the central core yarn in the cross section of the cotton yarn, as shown in Figure 1. It is a cotton yarn in which fine-grained raw cotton 2 with a small fineness is formed in the peripheral outer layer. In research using raw cotton with various micronya fineness (hereinafter referred to as fineness), it was found that the core of the yarn had a fineness of 5.0.
When the following raw cottons were used, no matter which fineness of the raw cotton was used in the outer layer of the yarn, a satisfactory double-layered cotton yarn with yarn stiffness, that is, stiffness, could not be obtained. or,
When raw cotton with a fiber size of 4.0 or more was used in the outer layer of the yarn, no matter which fineness of raw cotton was used in the core of the yarn, a satisfactory two-layer cotton yarn with softness, that is, a soft touch, could not be obtained. From the above results, the most suitable two-layer cotton yarn with a soft feel and strong elasticity is one in which the core is made of raw cotton with a fineness of 5.0 or more and the outer layer is made of raw cotton with a fineness of 4.0 or less. . [Example] Peruvian cotton with a fineness of 5.2 is used as the raw cotton for the core, and Egyptian cotton with a fineness of 3.8 is used for the raw cotton in the outer layer. Raw cotton 2 is about 70% of the total amount, and in the roving process, thick raw cotton is placed in the core and fine grain raw cotton is placed in the outer peripheral layer.
A double layered cotton roving was obtained. Next, the above-mentioned roving was subjected to a spinning process to obtain a two-layered cotton yarn. In order to measure the characteristics of this two-layer cotton yarn, we knitted a cotton jersey fabric (sinker stand circular knitting machine, 24 gauge).
The results are shown in Table 1 along with comparative examples. Overall, from the results shown in the table, Comparative Examples 1, 2, and 3 all have advantages and disadvantages, but the example was satisfactory in both wind characteristics.
〔考案の効果〕[Effect of idea]
綿繊維のみの構成でハリ腰があり、かつ肌ざわ
りに富む綿糸であつて、従来にない特種風合をも
つ二層構造綿糸が得られる。その利用価値は極め
て大である。
A double-layered cotton yarn having a special texture never seen before, which is a cotton yarn composed only of cotton fibers, is firm and has a rich feel to the skin. Its utility value is extremely large.
【図面の簡単な説明】[Brief explanation of the drawing]
第１図は本考案のモデル斜視図、第２図は本考
案の実施状態を示す粗紡機の側面図、第３図はそ
の平面図である。
１：太繊度原綿、２：細繊度原綿、３：フロン
ト・トツプローラ、４：ミドル・トツプローラ、
５：太繊度原綿スライバー、６：細繊度原綿スラ
イバー。
FIG. 1 is a perspective view of a model of the present invention, FIG. 2 is a side view of a roving frame showing an implementation state of the present invention, and FIG. 3 is a plan view thereof. 1: Thick fineness raw cotton, 2: Fine fineness raw cotton, 3: Front top roller, 4: Middle top roller,
5: Thick fineness raw cotton sliver, 6: Fine fineness raw cotton sliver.