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fluorescent whitening agent

Location:
H, A N
Status:
New
Sample Availibility:
yes
Payment Terms:
Cash, Bank Transfer, Letter of Credit, T/T, L/C
Categories:
Home > Chemicals > Chemicals Agents

Product Description

Technical notes on application

Continuous process

From water, in finishing liquors and all crosslinking processes.

Exhaust process:

From hard and soft water with an addition of electrolytes.

Dissolving/diluting

Miscible with cold or warm water in all proportions.

Stock solutions should be kept away from the light; also substrates treated with the whitening agent, as long as it is not fixed.

Required amount

MST-W liquid

CEL

Padding
liquor pick-up about 70 %

6 - 24 g/l

Suggested recipes

Continuous process

Padding method

For filled, handle and stiff finishes the required amount is:

6 - 24

g/l

MST-W liquid

Wash-and-wear finish on cotton

Dry crosslinking

6 - 24

g/l

MST-W

30 - 60

g/l

crosslinking agent

20 - 40

g/l

softener

9 - 18

g/l

Catalyst

0.5 - 1

ml/l

acetic acid 80%

Padding

liquor pick-up 60 - 90 %

then

Drying and curing on conventional curing ranges

Predrying

110 - 130 °C and separate

Curing

150 - 155 °C during 5 - 4 min

or

Drying and curing on stenter

zones 1 and 2

110 - 130 °C

zone 3, etc.

150 - 180 °C

Total treatment time:

70 - 40 s

nitrate catalysts are used, the goods must be thoroughly washed off, as even minimal amounts of nitrate cause the fabric to brown on exposure to light.

MST-B liquid is also suitable for wet crosslinking

Soft handle finish

Soft handle finish

6 - 24

g/l

MST-W liquid

15 - 30

g/l

softener

or

6 - 24

g/l

MST-W liquid

10 - 20

g/l

silicone softener

Padding

liquor pick-up 60 - 90 %
bath temperature about 20 °C

Drying

110 - 130 °C

Exhaust application

The affinity of MST-B liquid depends closely on the temperature and electrolyte content.

1.5 - 6

%

MST-W liquid

3 - 5

g/l

Glauber’s salt, anhyd.

Liquor ratio

10 : 1 - 20 : 1

Time/temperature

15 - 30 min at 20 - 50 °C

Leveling/stripping

20 - 60 min at 60 - 90 °C

To freshen up the whiteness and avoid subsequent yellowing, hydrogen peroxide or stabilized sodium dithionite should be added.

Re-whitening can be carried out with MST-W liquid or other products in the range which are suitable for cellulose fibers.

MST-B liquid can be radically stripped using a sodium chlorite bleach.

Stability

in the liquor

on the fibre

Hypochlorite bleaching liquors

not stable

good

Sodium chlorite bleaching liquors

not stable

not stable

Peroxide bleaching liquors

good

good

Reductive bleaching liquors

(hydrosulphite-based)

stable

good

Acid

below pH 5

not stable

below pH 5

not stable

Alkali

good

good

Hard water

good

Fastness properties

CEL

Light

ISO 105-B02

3-4

Washing *

ISO 105-C06/A1S

40 °C

3-4

ISO 105-C06/C1S

60 °C

2-3

ISO 105-C06/E2S

95 °C

1-2

Chlorine bleach

ISO 105-N01

mild

3

severe

2 - 3



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Contact Information

Company:
 Zhejiang Cathaya International Co., Ltd.
Phone Number:
  86-571-85098273
Fax Number:
 86-571-85098278
 
Zhejiang Cathaya International Co., Ltd.
 Zhejiang , China FREE
 

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