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| Hyrex L-AS |
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Water-borne Polyurethane Hyrex for Synthetic Leather
Waterborne Polyurethane Hyrex is for providing warm comfortable touch of the Synthetic Leather like genuine ones.
- Water borne Polyurethane is thoroughly stirred in about 10 minutes and the mixture form an uniform high viscosity by adding dropwise small drops of VS thickener (see attached) and toner.
- Once the viscosity is reached to the required level, the uniform high viscosity Polyurethane is allowed to stand overnight for the purpose of the vapor removal.
- The high viscosity Polyurethane can either be applied as an adhesive coats or as a heat reactive top coats using a transfer coating process by means of releasing paper and knife coater : * 1st step for skin coating is heat treated for about 2 minutes at 120'C to 150'C,
* 2nd step for adhesive coating is heat treated for about 3 minutes at 70'C to 110'C.
(Caution: Moisture should be dried perfectedly for prevention of lowering bonding strength)
- Press continuously textile or non-woven fabrics with 2-3 head speed on coated R.P using 160¡É heating roller with 7§¸/§² pressure.
- Compressed products shall be aged under 80'C for 3 days in curing chamber.
- Finally remove R.P. |
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Appearance : Semi-transparent
Solids(%) : 30 ¡¾ 2
pH : 7 ¡¾ 2
Ion : Anion
Viscosity(cps/25'C) : 500¡é
100%Modulus(Kg/§²) : 15 ¡¾ 5
Tensile Strength(Kg/§²) : 220 ¡¾ 50
Elongation(%) : 1200 ¡¾ 300
Benefits : non-yellowing |
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