biopolishing.ppt
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Transcript of biopolishing.ppt
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BIOPOLISHING
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BIOPOLISHING
• Here we use cellulases again to attack and weaken the cellulose fibres.
• Any fibres protruding for the surface of the garment are weakened and exposed and prone to being broken.
• Enzyme action alone is not enough to cause the breakage – mechanical action is also needed. Either the action of fabric in jet, or in tumble drying.
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BIOPOLISH
• Process to attack the surface of the garment to remove hairiness, pilling
• Creates smooth surface
Often calledAnti pill washDe-pill washFlat wash Biopolishing
• for BIOPOLISHING WASHING - ACID CELLULASES are used
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Fibrillated cotton Biopolished cotton
The effect on
the fabric surface
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ACID CELLULASE
• Working range pH 4.5 – 5.5
• Strong –medium action attack on cotton (cellulose) fibre– Attacks cotton fibres on surface of jean
– Causes surface fibres to break and detach
– Creates smooth
• Usually in liquid form and un-buffered
• Must be “killed”– By alkalinity
– Raise temp above 70 ºC
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Commonly known as “flat washing”.
• Often done after garment dyeing to clean up the garment
• Also done to soften up garments
• Possible problems
Change of shade
Loss of fastness
Loss of strength
Damage to threads/sewings
Weakening of seams
Bursts.
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• Bio-polishing is a finishing process for cellulosic fabrics and garments.
• It is the process of improving surface of the material. It is also an ‘Enzymatic singeing’.
• Bio-polishing with acid cellulose effectively reduces fabric fuzz and the pilling on denim materials.
A cellulosic treatment gives the fabric a durable improvement of:
• Resistance to pilling
• A clear lint and fuzz free surface structure
• Bio-polished garment looks new even after repeated wear
• Bio-polishing permanently enhances fabric look without any chemical coating, biopolishing improves drapebility and softness.
• The fabric surface obtains a silky sheen similar to that resulting from traditional mercerisation