认证那是做给外行人看的. (就象QS)
如你可以看看GL方面的指标, 任何只要能固化的树脂都能达到,
2.5 Minimum properties
2.5.1 For resin products consisting of UP resins,
the following minimum properties are specified for
use as laminating resins (values for gelcoat resins in
brackets):
tensile strength: 40 MPa (––)
fracture strain: 2,0 % (3,0 %)
modulus of elasticity: 2700 MPa (––)
(tension)
bending strength: 80 MPa (––)
dimensional stability
under heat: 60 °C (60 °C)
The water absorption after 168 h shall not exceed
70 mg for laminating resins and 60 mg for gelcoat
resins. |