Live shot of white cotton fabric close-up
When the refining kettle heats up for boiling-off, foam pushes the liquid level up; post-scour fabric whiteness and capillarity fall, rework and downgrading of grey cloth batches multiply, and delivery time and cost come under pressure together.
Chemi Tech launches the KM-901 series defoamer for high-temperature refining and scouring systems in textile dyeing and printing, with the addition level set flexibly against alkali concentration and refining temperature. This grade is a silicone defoamer that resists high temperature and keeps foam suppression lasting, without breaking or separating in hot alkaline liquor, a single dose covering the whole refining cycle. Using measured kettle foam-height and fabric-whiteness data, the suitable scheme for the KM-901 series can be given.
Chemi Tech Defoamer Advantages
The Chemi Tech KM-901 series defoamer is formulated for high-temperature refining systems in textile dyeing and printing. Its high-temperature stability is strong, breaking foam steadily in the refining kettle's hot alkaline liquor; foam suppression lasts long, a single dose covering the whole refining cycle; it is compatible in the same bath with refining and penetrating agents, without affecting fabric hand or whiteness; defoaming is fast, removing foam before scouring; its dosage is economical — low usage does not raise COD, keeping refining cost controllable.
Industry Pain Points and Solutions
Foam problems in high-temperature cotton refining mostly share one root cause: air entrainment in hot alkaline liquor and defoamer components that cannot resist high temperature acting together, ending up in two places — falling fabric whiteness and dropping capillarity.
Foam pushing the liquid level up compresses the refining kettle's effective volume and the uniformity of boiling-off falls. KM-901 resists high temperature and keeps foam suppression lasting, holding the kettle level steady through the whole boiling-off cycle.
After fabric whiteness and capillarity fall, the quality of pre-dyeing semi-finished goods fluctuates and rework and downgrading appear batch by batch. KM-901's foam breaking does not bring silicone spots back onto the fabric.
Rework and downgrading losses all spread into the cost of every piece of grey cloth. Against changes in alkali concentration and refining temperature, the dosage can be narrowed to an accountable range, directly cutting rework loss.
Typical Conditions and Verification
Customer: a dyeing and printing enterprise in Zhejiang, applied to the high-temperature refining and scouring process of cotton fabric.
After this dyeing plant's refining kettle heated up, surface foam lingered; post-scour fabric whiteness fluctuated occasionally and capillarity was unstable; defoamer changes were frequent under high-temperature strong alkali. After comparison of kettle foam height and fabric whiteness, Chemi Tech dosed KM-901, with dosage fixed by alkali-concentration tiers. After deployment, kettle foam fell back, fabric whiteness trended stable, and the first-pass rate of refining and scouring rose.
FAQ
Adding a defoamer in high-temperature refining — will it affect fabric hand and whiteness?
First check whether the defoamer components can withstand high-temperature alkaline liquor without breaking and whether they affect fabric hand. KM-901 has completed whiteness and hand comparison tests in cotton high-temperature refining conditions; within the recommended range fabric whiteness stays stable and hand is unaffected. Actual dosage uses alkali concentration as the baseline, with refining temperature and bath ratio as correction factors; Chemi Tech gives the suitable scheme from the side-by-side comparison of kettle foam height and fabric whiteness.