Permafin series-polyurethane softeners for Textile finishing.

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Permafin Dermaset Series Polyurethane
2009-2010
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What Is Polyurethane

• Polyurethane is an incredibly resilient,
  flexible, and durable manufactured material that
  can take the place of paint, cotton, rubber,
  metal, and wood in thousands of applications
  across all fields.
• Polyurethane might be hard, like fiberglass,
  squishy like upholstery foam, protective like
  varnish, bouncy like rubber wheels, or sticky
  like glue.
• Since its invention in the 40s, polyurethane has
  been used in everything from baby toys to
  airplane wings, and continues to be adapted for
  contemporary technology.

Why Polyurethane

• Nowadays we expect textiles to meet far higher
  standards. They have to be functional practical,
  easy care attractive.
• The only way to meet these demands is by using
  modern finishing methods.
• These involve some degree of mechanical
  finishing, but processing chemicals also play a
  major role.

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Functional aspects of textile finishes
Function

• Water oil repellency
• Water proofing
• Flame retardancy

Compensating undesirable fibre properties
Natural fibres CO Creasing CV
Shrinking Linen Abrasion
Felting Wool Moth damage
Abrasion Washing Silk
Abrasion
Synthetic Fibres
Hydrophobic property Electostatic charge Fibre
smoothness
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Demands made on textile finishes
Consumer
Function Appearance
Textile Mill

• Processes
• Reliable
• Versatile
• Simple
• Minimal Side effects
• Use of existing equipment

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Factors affecting the appearance of textile
finishes
Unatterable

• Basic Fabric construction
• Fibres
• Colour

Alterable by finishing processes

• Handle
• Surface

Mechanical Sanding Embossing Calendaring Sanforiz
ing Raising Brushing Tumble drying
Chemical Softeners Resin Finishes Antistatic
agents Mercerizing Alkaline shelling Biocides Inse
cticides
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The Use Of Permafin Series In Textile
Finishing

• To improve permanency of fluorocarbon finishes
• Shrink resist felt free treatment on wool
  finishes.
• Permanent press finish.
• Dimensional stability on knit wear
• Hydrophilic finishes.
• Improvement in pilling behavior.
• Improvement in crock fastness
• 3-D Ripple print on cellulosic
• Tear strength improver for cellulosic
• For handle modification like peach handle, soft
  suede type effect etc
• Down proof finish

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Functional Finishes

• Water Oil Repellent Finish
• Aquarepel XAN Blocked polyisocynate. One of the
  main problems of water and oil-repellent
  finishing with FC derivatives is wash fastness.
  Wash fastness can be improved substantially by
  crosslinking the FC resins with Aquarepel XAN a
  fluoro carbon extender.
• Felt Free Wool Finishes
• Dermaset BAP An additive for felt free finishing
  of wool. The advantage of Dermaset-BAP is that
  it can be used on woven knitted woollen fabrics
  without oxidative pretreatment(chlorination), so
  it is more environmentally friendly than
  alternative processes. This process has recently
  become important because applying this treatment
  after prescouring ensures problem free dyeing of
  woollen fabrics on jet units plus felt free
  finishing. This process makes it possible to use
  pure wool fabrics for machine washable trousers,
  shirts skirts.

Treated
Untreated
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Functional Finishes

• Crease Resist Finishes
• Crease-resist finish that enhance dimensional
  stability are the most important finishes for
  cellulosic fibres. Cellulosic crosslinking
  agents, especially formaldehyde-based products,
  are used for this. There is the problem of free
  formaldehyde . Labeling and consumer protection
  organizations are enforcing with manufacturers to
  minimize the free formaldehyde content of
  textiles. The maximum limit for clothing worn
  next to skin are generally 75-300 ppm. The limits
  for childrens clothing are far lower. Low
  formaldehyde formaldehyde free crosslinking
  agents require stronger catalyst because of
  their reduced reactivity. This catalyst tend to
  reduce the mechanical properties of cellulosic
  fibres. This is particularly critical in case of
  viscose.
• Combining formaldehyde containing cross linker
  along with Permafin-UR gives following
  advantages
• Finishes with low free formaldehyde content.
• High dry wet crease recovery.
• Excellent self smoothening.
• Reduced loss in tenacity.
• Improved abrasion resistance enhanced
  dimensional stability.

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Functional Finishes
Improvement in Pilling Behavior
Conventional Finish
Permafin UR Finish

• Hydrophilic Finish
• Permafin-UR as an absorbency handle improver
  suitable for polyester, cellulosic, woolen goods.
  
• Improvement in pilling behavior crock-fastness
• Permafin-UR can be used to produce a soft handle
  without increasing the fabric tendency to pill.
  The dry and wet crock-fastness of vat sulphur
  dyeings can be improved by applying a finish of
  Permafin-UR.

Improvement in crock fastness
Dry
wet
Without Finish
Finished with 40 g/l Permafin-UR
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Functional Finishes

• Easy Care Finish
• Permafin-Nano-PU, for easy care, high elastic
  various elegant finishes. Maximum elastic
  recovery voluminous handle. Suitable for
  cellulosic, synthetic woolen goods.

• 3-D Ripple Print
• Permafin-RPP for special 3-D ripple print on
  cellulosic goods.

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L.N.Chemical Industries
OFFICE ADDRESS - 403, Antariksh,
Makwana Road, Marol Naka, Andheri (E), Mumbai
400 059 Tel.- 91- 22- 4221 6789 (30 Lines)
91- 22- 6692 4112 Fax -91-22- 2836 6434
FACTORY ADDRESS - D- 14 /10, T.T.C. M.I.D.C
Industrial area, Turbhe , P.O.K.U.Bazar, Navi
Mumbai 400 705 Tel.-91- 22- 4141 9899 (30
Lines) Fax -91- 22- 4141 9888
Email ID ketan_at_lnchem.in
lnchem_at_vsnl.com