Fish glue is a highly viscous liquid at room temperature. Thickens when cooled down, it
reaches a rubber-like consistency at 0c and below. Fish glue can be made liquid again by heating without any loss of quality. Fish glueis a natural product which is obtained by cooking fish skin, followed by evaporation.
Physical and Chemical Properties
- Color: Light caramel
- Temperature range: -30°F to +500°F
- Solid content: approx 45 %
- Water content: approx. 55 %
- Viscosity at 24°C: 4000 cps
- Average molecular weight: 60,000
- Melting point: 5 - 10°C
- Ash: Less than 0.1%
- pH-Value: 4 – 6
- Specific gravity (20°C): 1.17 g/cm3
- Time to tack: 1 Minute
- Open time: 1.5 to 2 hours
- Storability: Excellent (freeze-thaw stable)
- Flammability: Non-flammable
- Shear strength: 3200 PSI with 50 % wood failure (ASTM D 905)
- The viscosity is measured at 24°C with a model LVT Brookfield Viscometer 4°C. This method uses a rotating spindle
inserted into the liquid.
- No gel-depressants are added. Small amounts of sassafras are added to improve fragrance.
Application Methods
Surface may be coated by roller coat, knife coat or brush coat.
Applications
- As an additive to adhesive formulations in the manufacture of remoistenable gummed paper packaging tapes.
- Wood gluing when long open times are needed for assembly operations.
- Paper bonding of heavy grade box board in packaging.
- Bonding of manila paper for identification tag manufacturing.
- As a water based leather finish.
- Any application where it is desirable to supply an adhesive coated surface which is to be re-activated much
later by simple water remoistening.
Advantages
- High initial tack when first coated or when remoistening the dry adhesive film.
- Slow setting for wood bonding applications when open times are desirable.
- Good solvent resistance.
- Excellent heat resistance.
- Easily thinned and cleaned up with water.