How to improve the production process of waterproofing of coated fabrics?

Baking temperature and process conditions: padding (TF- 630 50 g/L, TF- 630C 10%, rolling ratio about 95%)→baking (60 s)→moisturizing→testing. It can be seen from 1, 2 and 4 It can be seen that with the increase of the baking temperature, the stiffness of the cloth surface increases significantly, and the formaldehyde content decreases accordingly. When the baking temperature rises to 210 ℃, there is a slight peculiar smell on the cloth surface after baking. Combined with the factory application , it is recommended that the factory set the baking temperature at 190~200 ℃.
It can be seen from 3, 4 and 5 that with the prolongation of the baking time, the stiffness of the cloth surface increases significantly, and the formaldehyde content also decreases, but when the baking time is extended to 120 s, there is a slight peculiar smell on the cloth surface. .Combining the effects of different baking temperatures on the surface of the fabric, after analyzing the reasons, it is concluded that the baking temperature is too high and the time is too long, it is easy to produce trimethylamine [(CH3)3N] when TF-630 reacts, and the finished fabrics There is a fishy smell. [3] Therefore, when finishing, when the baking temperature is increased, the baking time can be correspondingly reduced, or the baking time can be correspondingly increased while reducing the baking temperature, which can achieve ideal application results. .Combined with the actual situation of the factory, it is recommended to use a speed of 80~110 m/min for fabrics with a mass per unit area of ​​less than 100 g/m2; for fabrics with a mass per unit area of ​​100~200 g/m2, it is recommended to use a speed of 70~90 m/min; For fabrics with a mass > 200 g/m2, a speed of 60~70 m/min is recommended.
Process conditions without adding catalyst: padding (rolling ratio is about 95%)→baking (180 ℃, 60s)→moisturizing→testing. When finishing 630, the more TF-630 is used, the higher the free formaldehyde content of the cloth surface, the heavier the odor of the cloth surface, but the increase in stiffness is not obvious. The curing agent can also be cured completely, but it requires a long reaction time. Under the normal process conditions of the factory, the reaction of TF-630 is very incomplete. Therefore, it is recommended that the factory selects a suitable catalyst while using TF-630 for finishing. - 630 cures completely in a short time. Compound finishing of other additives.

Tent Fabric Manufacturers