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(1) Wood grain pen color master can be artificially added, mixed with PVC dry mixture by the main material hopper, in accordance with the usual profile production process; Color master can also be added at the observation port of the extruder by means of an auxiliary feeder. The latter method can more accurately control the amount of wood grain pen color master to obtain a stable product with wood grain effect.
(2) Generally, the addition amount is about 1% for the base color component and about 1% for the wood grain component. The amount of titanium powder in PVC dry mixture will directly affect the color depth of wood grain profile products. In order to obtain darker wood grain pen products, the amount of titanium powder in the basic formula of the profile can be appropriately reduced, and an appropriate amount of ultraviolet absorbent and antioxidant can be added to ensure the weatherability of the product.
(3) The effect of wood grain pen is related to the structure of the mold and the size of the profile section. In general, the more complex the mold structure is, the harsher the process conditions for the formation of wood grain pen are, and the more difficult it is to adjust the effect of wood grain pen. The wood - grain pen with large section is also large, and the wood - grain pen with small section is also small.