CN102828306A - Apocynum venetum/combed cotton covered yarn - Google Patents

Abstract

The invention discloses an apocynum venetum/combed cotton covered yarn. The apocynum venetum/combed cotton covered yarn takes an apocynum venetum pure yarn as a core yarn, and the combed cotton covers in a spiral manner through a covering technology, and the apocynum venetum/combed cotton covered yarn is a product which makes up the blank. The technological parameters of the apocynum venetum/combed cotton covered yarn are selected as follows: core yarn density: 18.2tex-20.8tex; covered yarn density: 2 multiplied by 7.4tex; composite covered yarn density: 32.0tex-50.0tex; coverage: 360t/m-420t/m; and fiber content: 55%-70%. Moreover, the quality standard for adopting 7.4tex of combed cotton yarns to dually cover the covered yarn is set up. By the apocynum venetum/combed cotton covered yarn, the contradiction which is caused by keeping the apocynum venetum fiber function and improving the comfortability is resolved.

Description

Bluish dogbane/combed cotton wrap yarn

Technical field

The invention belongs to textile technology field, be specifically related to a kind of bluish dogbane/combed cotton coating cotton thread.

Background technology

Bluish dogbane is because of at first finding to gain the name in the Lop Nur, Xinjiang.Apocynum fibre is a kind of bast fiber, is positioned at the phloem tissue of stem stalk, is very loose fibres bundle, except that denominators such as the moisture absorption with bast-fibre is ventilative, also has far infrared and bacteriostasis property, is the green natural Recycled Fibers.With the lining of apocynum fibre exploitation, can greatly improve the health care of textiles.But bluish dogbane hide glue metallic substance content is high, smooth surface does not have curlingly, and length difference is big, and cohesive force is little; Spinning performance is poor; Can not be in drafting process by the common process resultant yarn, it is very big to do pure textile product difficulty with it, and the deep processing of its fiber has been brought suitable difficulty.At present general technology is it and cotton blending; Sometimes also sneak into a spot of terylene for the intensity that improves yarn; But it is functional that blending can not be given full play to apocynum fibre; Can not solve bluish dogbane textiles snugness of fit problem, the natural special efficacy that this has reduced bluish dogbane has to a certain extent hindered the utilization and extention of apocynum fibre and goods thereof.

Wrap yarn is to be yarn core with long filament or staple fibre, another kind of long filament of outsourcing or staple fibre sliver, and the outsourcing yarn coats heart yarn in a screw fashion.For example, Chinese invention patent CN200510044026.7 disclosed " production method of short staple enveloped composite yarn and device thereof ", Chinese invention patent CN200610167939.2 disclosed " outer cashmere composite yarn and manufacturing approach ".These methods and product all do not relate to bluish dogbane/combed cotton wrap yarn.

Summary of the invention

Bluish dogbane has that moisture absorption is ventilative, far infrared and function such as antibacterial, but the resultant yarn evenness fault, powerful low, wear no resistance, this brings difficulty to the weaving following process, has hindered the utilization and extention of apocynum fibre and goods thereof.The objective of the invention is that to keep apocynum fibre functional and improve the problem of both contradictions of comfortableness in order to solve, providing a kind of is the complex yarn of heart yarn, outsourcing combed cotton with the apocynum fibre.

The present invention adopts following technical scheme:

With the pure spinning of bluish dogbane is heart yarn, through cladding process, with spiral mode outsourcing combed cotton.This product is a kind of blank product.

Bluish dogbane/combed cotton wrap yarn technological parameter is elected as: line density, coverage degree, fiber content.

Heart yarn line density: 18.2tex～20.8tex; Outsourcing thread density: 2 * 7.4tex; Coating cotton thread density after compound: 32.0tex～50.0tex; Coverage degree: 360 t/m～420t/m; Fiber content: 55%～70%.

Line density

Line density definition: with weight (g) expression of 1000m yarn when the official regain, unit is tex.See formula (1).

T=G/L×1000 （1）

In the formula: T is a line density, and unit is Tekes (tex); G is a weight, and unit is gram (g); L is a length, and unit is a rice (m).

The line density of wrap yarn is seen formula (2).

TB=?TS＋∏d3/100×tw×Tw?（2）

In the formula: TB is the line density (tex) of wrap yarn; TS is the line density (tex) of heart yarn; D3 is the diameter (mm) of heart yarn; Tw is the twist (t/m) of outsourcing yarn; Tw is the line density (tex) of outsourcing yarn.

Coverage degree

Coverage degree is the coating twist of outer wrapping fiber to the core silk, is defined as the number of twists of unit length yarn, and unit is sth. made by twisting/rice (t/m), sees formula (3).

t?=nd/ud （3）

In the formula: nd is spindle rotating speed (r/min); Ud is for drawing yarn roller linear velocity (r/min).

The size of the wrap yarn twist directly influences the resultant yarn performance.When coating the twist above certain limit; Increase along with outer wrap yarn looping helical angle; And its active component that upwards bears in yarn axis is reduced, brute force can descend on the contrary, and coats that the twist is too high must to cause that the resultant yarn feel is hardened, flexibility is poor; Coiling speed reduces, and production efficiency descends.If it is too small to coat the twist, it is little to make a concerted effort between outsourcing yarn and heart yarn, and the meeting looping on the surface of resultant yarn of outsourcing yarn has limited applicability.Therefore, guaranteeing that the resultant yarn index meets the requirements and improves to greatest extent under the condition of equipment productivity, should rationally choose the coating twist.

The size that coats the twist should be decided according to the thickness of different cultivars, outer wrap yarn, the factors such as outward appearance of wrap yarn.

The variation of cladding process parameter directly influences the performance of composite yarn, and distributing technological parameter when therefore coating rationally is the key that improves yarn quality.

The maximum twist that coats is seen formula (4).

T/m=1m/ (∑ outsourcing yarn diameter mm/100) (4)

Fiber content

The fiber content of wrap yarn is seen formula (5), formula (6).

Hs=TsWs/(TsWs+TwWw) （5）

Hw=1-Hs （6）

In the formula: Hs is the content (%) of heart yarn; Ts is the line density (tex) of heart yarn; Ws is the regain (%) of heart yarn;

Tw is the line density (tex) of outsourcing yarn; Ww is the regain (%) of outsourcing yarn; Hw is the content (%) of outsourcing yarn.

The wrap yarn quality index

With the apocynum yarn is heart yarn, adopts the product quality indicator of 7.4tex combed cotton yarn double-contracting wrap yarn:

Line density 18.2tex and following: fracture strength (cN/tex):>=12.0; The ultimate strength coefficient of variation (%) :≤25.0; Hundred meters mass deviations (%): ± 4.0, strip dry uniformity variant coefficient (%)≤30.0, fiber crops knot+280% (individual/km) :≤2800; Slubbing+50% (individual/km) :≤2600, percentage of twist deviation (%): ± 5.0;

More than line density 25.0～18.2tex: fracture strength (cN/tex):>=13.0; The ultimate strength coefficient of variation (%) :≤24.0; Hundred meters mass deviations (%): ± 4.0, strip dry uniformity variant coefficient (%)≤28.0, fiber crops knot+280% (individual/km) :≤2200; Slubbing+50% (individual/km) :≤2000, percentage of twist deviation (%): ± 5.0;

More than line density 37.0～25.0tex: fracture strength (cN/tex):>=14.0; The ultimate strength coefficient of variation (%) :≤22.0; Hundred meters mass deviations (%): ± 4.5, strip dry uniformity variant coefficient (%)≤27.0, fiber crops knot+280% (individual/km) :≤2000; Slubbing+50% (individual/km) :≤1800, percentage of twist deviation (%): ± 5.0;

More than line density 66.7～37.0tex: fracture strength (cN/tex):>=17.0; The ultimate strength coefficient of variation (%) :≤20.0; Hundred meters mass deviations (%): ± 4.5, strip dry uniformity variant coefficient (%)≤26.0, fiber crops knot+280% (individual/km) :≤2200; Slubbing+50% (individual/km) :≤1600, percentage of twist deviation (%): ± 5.5.

The specific embodiment

Embodiment bluish dogbane/combed cotton wrap yarn technological parameter

Line density

Bluish dogbane heart yarn line density: 20.8 tex, diameter: 0.173mm; The outer double-contracting of combed cotton, solid wire density: 7.4tex; Coat the twist: 395t/m.

Then: coating cotton thread density (tex)=20.8+ [(3.14159 * 0.173)/100] * 395 * 7.4=20.8+15.9=36.7.

The height of yarn circle or circle are apart from (mm)=1000/=1000/395=2.53.

Coverage degree

The line density of combed cotton yarn: 2 * 7.4tex, single diameter: 0.1mm, then: the maximum twist (t/m)=1/ (2 * 0.001)=500 that coats.

Fiber content

Bluish dogbane heart yarn line density: 20.8 tex, regain: 12%; Calculate combed cotton yarn line density: 15.9 tex, regain: 8.5% according to (2) formula.

Then: bluish dogbane heart yarn content (%)=(20.8 * 12)/[(20.8 * 12)+(15.9 * 8.5)]=64.87; Combed cotton yarn is outsourcing yarn content (%)=1-64.87%=35.13.The fiber content ratio: bluish dogbane/combed cotton A65/JC35, A is the bluish dogbane code name, JC is the combed cotton code name.

Claims (3)

1. bluish dogbane/combed cotton wrap yarn is characterized in that doing yarn core with apocynum yarn, the complex yarn that forms with spiral mode outsourcing combed cotton.

2. bluish dogbane according to claim 1/combed cotton wrap yarn is characterized in that the wrap yarn technological parameter is: heart yarn line density: 18.2tex～20.8tex; Outsourcing thread density: 2 * 7.4tex; Coating cotton thread density after compound: 32.0tex～50.0tex; Coverage degree: 360 t/m～420t/m; Fiber content: 55%～70%.

3. bluish dogbane according to claim 1/combed cotton wrap yarn is characterized in that, is heart yarn with the apocynum yarn, adopts the double-contracting of 7.4tex combed cotton yarn, and its product quality indicator is:

Line density 18.2tex and following: fracture strength (cN/tex):>=12.0; The ultimate strength coefficient of variation (%) :≤25.0; Hundred meters mass deviations (%): ± 4.0, strip dry uniformity variant coefficient (%)≤30.0, fiber crops knot+280% (individual/km) :≤2800; Slubbing+50% (individual/km) :≤2600, percentage of twist deviation (%): ± 5.0;

More than line density 25.0～18.2tex: fracture strength (cN/tex):>=13.0; The ultimate strength coefficient of variation (%) :≤24.0; Hundred meters mass deviations (%): ± 4.0, strip dry uniformity variant coefficient (%)≤28.0, fiber crops knot+280% (individual/km) :≤2200; Slubbing+50% (individual/km) :≤2000, percentage of twist deviation (%): ± 5.0;

More than line density 37.0～25.0tex: fracture strength (cN/tex):>=14.0; The ultimate strength coefficient of variation (%) :≤22.0; Hundred meters mass deviations (%): ± 4.5, strip dry uniformity variant coefficient (%)≤27.0, fiber crops knot+280% (individual/km) :≤2000; Slubbing+50% (individual/km) :≤1800, percentage of twist deviation (%): ± 5.0;

More than line density 66.7～37.0tex: fracture strength (cN/tex):>=17.0; The ultimate strength coefficient of variation (%) :≤20.0; Hundred meters mass deviations (%): ± 4.5, strip dry uniformity variant coefficient (%)≤26.0, fiber crops knot+280% (individual/km) :≤2200; Slubbing+50% (individual/km) :≤1600, percentage of twist deviation (%): ± 5.5.