A kind of flax roving boiling and bleaching process
The invention belongs to flax spinning technology field, particularly belong to flax roving boiling and bleaching process field.
The existing roving boiling and bleaching of present domestic flax spinning factory adopts inferior oxygen bleaching process, purpose is that part removes pectin, lignin, removal pigment impurity etc., increase fiber division degree, help spun yarn processing, its technical process is: pickling-→ Asia floats-→ washing-→ oxygen floats-→ washing, sodium chlorite owing to employing in this technology belongs to strong oxidizer, very easily fire explosive, bring very big inconvenience for transportation, keeping and use, and often have the chlorine dioxide generation to cause environment abominable in the operation, it is healthy directly to endanger the operator.And the rove behind the half deguming makes finished product yarn brute force can not reach the expection requirement because sodium chlorite causes cellulose damage (being referred to as chlorine damage).Chinese patent application number is 92105486 bibliographical informations with twice hydrogen peroxide boils to float and replaces sodium chlorite of the prior art and boil to float to boil with hydrogen peroxide and float, but always not in factory application, the Western European countries adopt the dioxygen bleaching process mostly at present.
The present invention seeks to develop a kind of practical roving boiling and bleaching process that is suitable at the deficiency of above-mentioned existing roving boiling and bleaching process, the present invention not only satisfies spun yarn spinning process conditional request, and yarn strength increases substantially, can satisfy the general yarn quality requirement in international market, technological parameter is stable, technology is reliable, and improves operating environment greatly.
Technical scheme of the present invention is that the flax roving normal pressure boils and floats one-step method, and its technical process is: washing-→ pickling-→ boil float-→ oxygen floats-→ washing, detailed process is:
(1) washing: normal temperature washing twice, time 10min.
(2) pickling; H
2SO
44～5g/l
ED-8 (polyoxyethylene fatty acid ester) 0.5～2g/l
20 ℃-30 ℃ of temperature, time 10min.
(3) boiling-off: 1. SD (sodium dithionite) 6～10g/l
②S(Na
2S) 4～8g/l
3. N (anthraquinone) 2～5g/l
④NaOH 2～7g/l
⑤ED-8 0.5～2g/l
Be warming up to 40 ℃ of addings 2.～3.; Heated up 1 ℃ by 40 ℃～70 ℃ per minutes, 1. 70 ℃～95 ℃ addings are incubated 30～60min.
(4) washing: normal-temperature water is washed till neutrality
(5) oxygen floats: 6. H
2O
2(100%) 3～7g/l
7. hydrogen peroxide stabilizer 5～10g/l
⑧ED-8 0.5～2g/l
Be warming up to 40 ℃ of addings 7.～8., heating up 70 ℃～75 ℃ adds H
2O
2Back insulation 30～90min.
(6) washing: twice of normal temperature washing.
The present invention is characterised in that (3), and whole boiling and bleaching process process all is to operate under normal pressure.
The advantage that the present invention had:
1. technological parameter is stable, atmospheric operation.
2. operating environment of pollution not.
3. energy savings shortens the production cycle.
4. the raising yarn quality reduces integrated cost.
China flax place of production concentrates on the Heilongjiang Province, but the place of production different scutched line quality difference, the color and luster difference of fiber crops is bigger, and therefore concrete technical application adds will be adjusted man-hour, equally also will note adjusting to the import scutched line.
Embodiment one: import scutched line rove (long fiber crops) boiling and bleaching process; Scutched line rove 560Kg (one pot), effecting reaction volume 2800L.Implement by following process: washing-→ pickling-→ boiling-off-→ washing-→ bleaching-→ washing
(1) washing: normal temperature washing twice, time 10min;
(2) pickling: H
2SO
44g/l
ED-8 0.5g/l
20 ℃ of temperature, time 10min.
(3) boiling-off: 1. SD 8g/l
②S 4g/l
③N 4g/l
④NaOH 3g/l
⑤ED-8 0.5g/l
Be warming up to 40 ℃ of addings 2.～5., rise to 70 ℃ of addings 1. with 1 ℃ of per minute, insulation 30min by 40 ℃～70 ℃.
(4) washing: normal-temperature water is washed till neutrality.
(5) oxygen floats: 1. H
2O
2(100%) 3g/l
2. hydrogen peroxide stabilizer 5g/l
③ED-8 0.5g/l
Be warming up to 40 ℃ of addings 2.～3., rise to 70 ℃, add 1., insulation 30min with 1 ℃ of per minute.
(6) washing: normal temperature washing twice, time 10min.
The end product quality standard:
Whiteness: 60～65 °
Division degree: 800～1100
Loss late: 8～10%
Rove is wet strong: 400～600g
Embodiment two: homemade scutched line (long fiber crops) boiling and bleaching process:
Scutched line rove 360Kg (one pot), effecting reaction volume 2800L, implement with following technology: washing-→ pickling--→ boil float-→ washing-→ bleaching-→ washing
(1) washing: normal temperature washing twice, time 10～15min
(2) pickling: H
2SO
45g/l
ED-8 2g/l
30 ℃ of insulation degree, time 10min
(3) boiling-off: 1. SD 10g/l
②S 8g/l
③N 5g/l
④NaOH 5g/l
⑤ED-8 1g/l
Be warming up to 40 ℃ of addings 2.～5.,, add 1., insulation 45min by 1 ℃ of 60 ℃ of per minute.
(4) washing: be washed to neutrality.
(5) oxygen floats: 1. H
2O
2(100%) 6g/l
2. hydrogen peroxide stabilizer, 10g/l
③ED-8， 0.5g/l
Be warming up to 40 ℃ of addings 2.～3.,, add 1., insulation 45min with 1 ℃ to 85 ℃ of per minute.
(6) washing: normal temperature washing twice, time 10min.
The end product quality standard:
Whiteness: 55～60 °
Division degree: 800～1000
Loss late: 8～12%
Rove is wet strong: 500～1000g