CN1133905A

CN1133905A - Method for degumming of flax rove without sodium chlorite bleaching

Info

Publication number: CN1133905A
Application number: CN 95102365
Authority: CN
Inventors: 王滨立; 史加强
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-20
Filing date: 1995-03-20
Publication date: 1996-10-23
Anticipated expiration: 2015-03-20
Also published as: CN1062620C

Abstract

A degumming method for flax roving comprises pretreating, degumming and bleaching, washing in water, secondary degumming and rebleaching, and washing in water, and features no need of sodium chlorite that is explodable, low cost, and no degumming chromatic difference. The degummed flax fibre shows selective oxidation in microscope and high strength, flexibility, fissility and average length in macroscope.

Description

Degumming method is floated in the abolishment Asia of flax roving

Degumming method is floated in the abolishment Asia that the present invention relates to flax roving

At present, flax spinning comes unstuck and generally adopts pickling-Asia to float-wash-the oxygen bleaching process flow process.The strong oxidizer sodium chlorite that wherein uses in the pickling is explosive dangerous material, and it not only costs an arm and a leg, transports protects battalion's difficulty, and the toxic gas chlorine dioxide (phosgene) of in use overflowing is harmful.Float the Asia is that low temperature acidity is floated, it then is that high-temperature alkaline floats that oxygen floats, the pH value of twice bleaching differs 8.00 more than the list, the temperature difference is up to more than 50 ℃, because of than, the middle washing of twice bleaching can't be cleaned, and irregularity is big, aberration is serious from spending for the process of fiber after coming unstuck, spun yarn degradation price reduction therefore and in a large number.

Task of the present invention is: overcome the deficiency that existing degumming method exists, propose a kind of degumming method that float the Asia of abolishing.

Task of the present invention realizes as follows: with flax roving at first: a, give processing before coming unstuck: in batching be:

2.6%～3.5% (owf) NaOH

1.8%～2.5% (owf) sodium sulfite

0.2%～2.5% (owf) calgon

2.2%～2.5% (owf) sodium carbonate

In the solution of 0.5% (owf) M80, be 70 ℃ to 105 ℃ in temperature, the time is 30～45min, and pressure is that normal pressure is to 2.5kpa;

B, be: 1.5%～1.8% (owf) hydrogen peroxide in batching

1.2%～1.5% (owf) hydrogen peroxide bleaching stabilizer

In the solution of 0.8%～1.0% (owf) bleeding agent, temperature is 75 ℃～100 ℃, and the time is 30～60min, and pressure is 1.5～3kpa, degumming and bleaching;

C, washing: temperature is 80 ℃～95 ℃ under normal pressure, and the time is 15min～25min;

D, secondary degumming float again, prepare burden to be:

1.3%～1.5% (owf) hydrogen peroxide

1.0%～1.2% (owf) hydrogen peroxide bleaching stabilizer

In the solution that 0.7%～0.8% (owf) bleeding agent constitutes, be 1.5kpa～2.5kpa at pressure, temperature is 80 ℃～95 ℃, and the time is 30～45min;

E, washing, under normal pressure, temperature is that 30 ℃～50 ℃ times are 1.5～2.5min.

The present invention is because employing is given processing before coming unstuck, come unstuck then, do not use explosive dangerous material sodium chlorite, production cost is reduced, and the aberration that comes unstuck is eliminated, and makes the linen fibre after coming unstuck belong to selective oxidation on microcosmic, on macroscopic view, show as the fibre strength height, pliability is good, fiber division degree height, and average fiber length is long.

Accompanying drawing is a process chart of the present invention;

Preferred forms of the present invention, adopt technological process as shown in the figure, at first carry out a, give processing before coming unstuck, in temperature is 70 ℃～105 ℃, and pressure is that normal pressure is in batching to the condition of 2.5kpa: give in the solution of NaOH 2.6%～3.5% (owf), sodium sulfite 1.8%～2.5% (owf), calgon 0.2%～2.5% (owf), sodium carbonate 2.2%～2.5% (owf), M800.5% (owf) and handle 30min to 45min.B, degumming and bleaching, 75 ℃ to 100 ℃ of temperature, pressure is 1.5～3kpa; In batching be: degumming and bleaching in the solution of hydrogen peroxide 1.5%～1.8% (owf), hydrogen peroxide bleaching stabilizer 1.2%～1.5% (owf), bleeding agent 0.8%～1.0% (owf), the time is 30min to 60min; C, washing are that the washing time is 15min to 25min under 35 ℃ to the 60 ℃ normal pressures in temperature; D, secondary degumming float again, in temperature is 80 ℃ to 95 ℃, pressure is 1.5kpa to 2.5kpa, prepares burden to be: in the solution of hydrogen peroxide 1.3%～1.5% (owf), hydrogen peroxide bleaching stabilizer 1.0%～1.2% (owf), bleeding agent 0.7%～0.8% (owf), the time is 30min-45min; E, washing, under normal pressure, temperature is 30 ℃～50 ℃, the time is 1.5～2.5min.

Claims

1, degumming method is floated in a kind of abolishment Asia of flax roving, it is characterized in that:

A, give processing before coming unstuck: be in batching:

NaOH: 2.6%～3.5% (owf)

Sodium sulfite: 1.8%～2.5% (owf)

Calgon: 0.2%～2.5% (owf)

Sodium carbonate: 2.2%～2.5% (owf)

In the solution of M80:0.5% (owf), be 70 ℃ to 105 ℃ in temperature, the time is 30～45min, and pressure is that normal pressure is to 2.5kpa;

B, be: hydrogen peroxide 1.5%～1.8% (owf) in batching

Hydrogen peroxide bleaching stabilizer 1.2%～1.5% (owf)

In the solution of bleeding agent 0.8%～1.0% (owf), temperature is 75 ℃～100 ℃, and the time is 30～60min, and pressure is 1.5～3kpa;

C, washing: under normal pressure, temperature is 80 ℃～95 ℃, and the time is 15min～25min;

D, secondary degumming float again, in batching are:

Hydrogen peroxide 1.3%～1.5% (owf)

Hydrogen peroxide bleaching stabilizer 1.0%～1.2% (owf)

Bleeding agent 0.7%～0.8% (owf)

E, washing, under normal pressure, temperature is 30 ℃～50 ℃, the time is 1.5～2.5min.