Method/step
Differential comparison of waterproof canvas
First: Look at the appearance:
Excellent: Good waterproof canvas has good color and bright.
Bad: No gloss or dim gloss.
Second, look at wear:
Excellent: Good waterproof canvas is very careful in material proportion, less wear and tear, on general ground or other hard objects.
After wiping, it can also play a waterproof effect.
Poor: Material proportion is inappropriate, for example, too much calcium powder, little tension, easy to fracture, poor wear performance, ground
After friction, it will be damaged and can not be used normally.
Third, look at the degree of divestiture:
Excellent: High quality canvas is difficult to scrape off the surface gum because the gum and embryo cloth are well blended, and the embryo texture of the surface embryo cloth is clear.
Poor: The poor quality canvas has thick coating, smooth surface, less colloid and more stone powder, so it is easy to scrape off the surface and expose the germ cloth.
Fourth, feel:
You: It feels very soft. Although it feels like the thickness is normal, in fact, the thickness has reached the requirement. It feels very soft and does not feel rough.
Bad: It feels thick and hard, and has poor softness.
Fifth, understand the production process:
Excellent: Vertical machine production, high requirements for raw materials, must have a certain degree of purity of raw materials. Vertical machine often produces PVC waterproof canvas to be slightly expensive, waterproof canvas product purity is also high.
Disadvantage: Horizontal machine production requires lower raw materials than vertical machine production. Horizontal machine production can press any kind of rubber.
Differential comparison of waterproof canvas
First: Look at the appearance:
Excellent: Good waterproof canvas has good color and bright.
Bad: No gloss or dim gloss.
Second, look at wear:
Excellent: Good waterproof canvas is very careful in material proportion, less wear and tear, on general ground or other hard objects.
After wiping, it can also play a waterproof effect.
Poor: Material proportion is inappropriate, for example, too much calcium powder, little tension, easy to fracture, poor wear performance, ground
After friction, it will be damaged and can not be used normally.
Third, look at the degree of divestiture:
Excellent: High quality canvas is difficult to scrape off the surface gum because the gum and embryo cloth are well blended, and the embryo texture of the surface embryo cloth is clear.
Poor: The poor quality canvas has thick coating, smooth surface, less colloid and more stone powder, so it is easy to scrape off the surface and expose the germ cloth.
Fourth, feel:
You: It feels very soft. Although it feels like the thickness is normal, in fact, the thickness has reached the requirement. It feels very soft and does not feel rough.
Bad: It feels thick and hard, and has poor softness.
Fifth, understand the production process:
Excellent: Vertical machine production, high requirements for raw materials, must have a certain degree of purity of raw materials. Vertical machine often produces PVC waterproof canvas to be slightly expensive, waterproof canvas product purity is also high.
Disadvantage: Horizontal machine production requires lower raw materials than vertical machine production. Horizontal machine production can press any kind of rubber.
