CN1133909A - Method for dyeing of flax yarn - Google Patents

Abstract

A dyeing method for flax yarn, conducted after degumming and bleaching but before spinning, comprises pretreating bleached roving, washing in water, dyeing, washing in water again, spinning, drying and winding. Compared with the technology to dye spun yarn, it features greatly shortening technological process, low cost, sufficient and uniform dyeing and high dyeing rate and colour fastness.

Description

A kind of colouring method of linen yarn

The present invention relates to a kind of colouring method of textile industry.

The dyeing of linen yarn generally is the method that adopts spun yarn dyeing, mainly comprises metal dyeing and hank dyeing, and this colouring method mainly exists following several shortcoming: 1, dye not saturating.Because the flax wet spun yarn adopts the mode of half bleaching half deguming to produce, pectin remaining in the spun yarn closely bonds together linen fibre, makes dyestuff infiltrate the spun yarn center fully and makes the spun yarn after dying " the white heart " occur.2, dye irregular.Because the flax wet spun yarn adopts the bundle fiber spinning, spun yarn itself is mixed by bundle fiber and filament, thereby the existence of the natural ring of linen yarn makes the cross section of spun yarn be irregular multiple edge body, so each section of spun yarn vary in diameter is big, capillary effect is irregular, therefore causes uneven dyeing.3, dyefastness is low, the dyestuff dye-uptake is low.Because the most of fiber that can not enter fully with the spun yarn surface action by the spun yarn inside of pectin bonding of dyestuff during spun yarn dyeing, thereby the dye-uptake of dyestuff is low, dyefastness is poor.4, technological process is long, the spun yarn loss in weight is big.

Task of the present invention is: propose upward before the fine spining machine spinning it to be dyeed behind a kind of flax roving degumming and bleaching, thereby the flax roving after the available dyeing is directly produced the new technology of coloured flax spun yarn.

Task of the present invention realizes as follows: the flax roving after will bleaching:

A, give processing and be in batching:

SD： 0.8％～1.2％(owf)

JFC： 0.5％～0.8％(owf)

Sodium sulfite: 1.5%～1.8% (owf)

Sodium carbonate: 1.2%～1.5% (owf)

Calgon: 0.2%～0.35% (owf)

In the solution that M80:0.8%～1.0% (owf) is made into, be 30 ℃～65 ℃ in temperature, the time is to give processing under 15min～25min normal pressure;

B, washing: under normal pressure, temperature is 45 ℃～60 ℃ washings, and the time is 15min～30min;

C, dyeing, under the normal pressure, in temperature was 45 ℃～95 ℃ dye solution, the time was 30min～90min;

D, washing, under the normal pressure, temperature is 30 ℃～60 ℃, the time is 15min～30min.

The present invention is owing to be it to be dyeed before the fine spining machine spinning on behind the flax roving degumming and bleaching, thereby the flax roving after the available dyeing is directly produced coloured flax spun yarn, the production procedure of this new technology only increases one procedure than producing common technological process of partly floating yarn, shorten significantly than the technological process of producing coloured spun yarn with metal dyeing and hank dyeing, the loss in weight and the production cost of dyed yarn per ton reduce significantly, and because rove density is little, capillary effect is good, the linen fibre of forming rove is in loose condition (of surface), not by the pectin tight bond, so with the coloured linen yarn of this explained hereafter not only can imbue dye even, and the dye-uptake of dyestuff and the equal high level cadre's traditional handicraft of dyefastness.

Accompanying drawing is a process chart of the present invention.

Optimum implementation of the present invention, as figure, the rove a after at first will bleaching, give processing: be in batching:

SD： 0.8％～1.2％(owf)

JFC： 0.5％～0.8％(owf)

Sodium sulfite: 1.5%～1.8% (owf)

Sodium carbonate: 1.2%～1.5% (owf)

Calgon: 0.2%～0.35% (owf)

In the solution of M80:0.8%～1.0% (owf), under the normal pressure, temperature is 30 ℃～45 ℃, and the time is 15min～25min (immersion);

B, washing: under normal pressure, be 45 ℃～60 ℃ in temperature, the time is 15min～30min;

C, dyeing: under the normal pressure, in temperature was 45 ℃～95 ℃ dye solution, the time was 30min～90min;

D, washing: under the normal pressure, temperature is 30 ℃～60 ℃, and the time is 15min～30min.

Claims (1)

1, a kind of method of directly producing coloured flax spun yarn with the method for flax roving dyeing is characterized in that: the rove after will bleaching:

A, give processing: in batching be: in the solution that SD:0.8～1.2% (owf), JFE0.5%～0.8% (owf), sodium sulfite 1.5%～1.8% (owf), sodium carbonate 1.2～1.5% (owf), calgon 0.2%～0.35% (owf), M800.8～1.0% (owf) are made into, in temperature is 30 ℃-65 ℃, time is 15min-25min, gives processing under the normal pressure.

B, washing: under normal pressure, temperature is 45 ℃～60 ℃, and the time is 15min～30min;

C, dyeing: under the normal pressure, temperature is 45 ℃～95 ℃, and the time is 30min～90min;

D, washing: under the normal pressure, temperature is 30 ℃～60 ℃, and the time is 15min～30min.

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