Textile finishing

1.Advantages of "KURARAY POVAL"

• High adhesion to various kinds of fibers.
• Excellent mildew resistance: no deterioration.
• Colorless: will not affect color of finished fabric.
• Odorless

2.Formulation

• For sheet, table cloth, chair cover etc.

  PVA-117K:	0.75 - 1%
  Starch:	3.5 - 4% (Corn starch/modified starch = about 1/1)
  Softener:	1%
  Fluorescent dye:	0.25%
  Pick-up:	60%/fabric

3.	The following methods will provide washing and moisture resistance to finished textiles.

• Use PVA-124 and cure at 130 - 140 for about 5 minutes.
• Add 10 parts of melamine-formaldehyde resin to 100 parts of PVA-117K and cure at about 140. If a proper concentration catalyst has been selected, curing temperature can be lowered.

Treatment with thermosetting resins such as urea-formaldehyde, melamine-formaldehyde, contributes wrinkle and shrinkage resistances to fabrics. Depending on the kinds or take up of resins, however, tear resistance or bending resistance of the fabrics may be weakened. "KURARAY POVAL" used as a modifier can prevent this.

1.Advantages of "KURARAY POVAL"

• To prevent any weakening in the tear strength of a fabric, chemically bound with thermosetting resins.
• To achieve hard finishing with smaller quantity than PVAc emulsion does, though that washing resistance is not so strong, comparing with PVAc emulsion.

2.Formulation

• For cotton, P/C shirt

  Glyoxal resin:	3 - 5% (resin weight)
  Softener:	1 - 2% (gross weight)
  Catalyst:	20%/glyoxal resin
  Pick-up:	75 - 80%
  Pre-drying:	100, 1 - 2min.
  Curing:	150 - 160, 2 - 3min.

  Case 1. PVA-117K: 0.25 - 1%
  Case 2. PVAc emulsion: 0.75 - 3%

Note:

• Melamine Formalin resin can also perform good hard finishing as well as PVA, but its residual formalin may harm skin.
• For cotton fabric, concentration of resin should be less than 5% in order to prevent drop of tear strength by chemical reaction of glyoxal with cotton.