Refrigeration & Heat Exchange

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Overflow Textile Dyeing Machines , Alkali Deweighting Polyester Fabric Dyeing Machine

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The machine used to deal with the alkali deweighting of polyester fabric, polyester fabric after deweighting treatment has a silky soft and feel. The treatment effect is uniform, high alkali recovery rate, low energy consumption, large capacity, easy to operate, improve the grade of polyester fabric and improve the first selection of this kinds of textile value-added processing equipment. The machine also can be used as natural fiber fabric under normal temperature dyeing and bleaching processor.



Alkaline technology of polyester fabric with intermittent impregnation method and pad steam method and pad piled up method.

(1) Immersion method
Impregnation method applied in the alkali deweighting process is more, the technology of flexible, simple equipment, finishing products feel is good, suitable for small batch more varieties of production. But the alkali reaction efficiency is low, and the quality differences between batch and batch.
Impregnation method of treatment of alkali deweighting equipment with barrel, rope dyeing machine, ?the overflow dyeing machine, ?high temperature and high pressure dyeing machine and jet dyeing machine, etc.NaOH concentration of 15 ~ 30 g/L, according to equipment and reduction rate.Add 0.5 ~ 1 g/L promoter, NaOH concentration can be reduced to 15 ~ 20 g/L.Must be added into the alkali liquor alkali dispersants 1 ~ 2 g/L, scatter the hydrolysis of polyester product in processing bath, prevent deposition on the fabric.Lye in 80 ~ 100 ℃ when dip fabric 30 ~ 60 min, then washing, and adequately.
Such as 90 g/m2 polyester twill, in the high temperature alkali deweighting vats or jet dyeing machine, and demand reduction rate of 18%, can adopt the following lye composition (g/L) :
? ? ?NaOH 15 ~ 20
? ? ?Spread 2
? ? ?Promoter of 0.5
? ? ?Or NaOH 30
? ? ?Dispersant 2
? ? ?Fabric processed in 110 ℃ for 20 min, and then fully washed, acetic acid neutralization.
(2) pad steam
Continuous alkali deweighting process to improve the production efficiency, reduce cost, and the uniformity of deweighting is superior to the impregnation method.With pad steam method applied is more, the production effect is good.
Pad steam method can be used under normal steaming box or high temperature and high pressure steam box for processing.Reaction of sodium hydroxide after pad steam efficiency is higher, close to 100%, as a result, the lye concentration according to decrement rate formula to calculate.Accelerator effect is not obvious, it is necessary to add alkali penetrating agent, in order to improve the permeability of lye.Rolling base should be uniform, residual rate is low, usually under 100 ℃ steam 20 ~ 30 min or 120 ~ 130 ℃ under 2 ~ 3 min, steaming and washing, and fully.

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Specifications

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Model | Liquor?Ratio | Working Temperature(℃) | Capacity (kg) | Fabric Weight(g/M2) | Total Power(kw) |
ZJ-500 | 1:8~10 | 98 | 500 | 50~600 | 25.2 |
ZJ-800 | 800 | 25.2 |
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