Fecha de publicación:
Fuente: WIPO "hemp"
The invention provides a preparation method of a low-cost plant fiber film. The preparation method comprises the following steps of A), opening a long fiber raw material, and preparing a long fiber net in a traction lapping manner; B), opening a short fiber raw material, and preparing a short fiber net in an airflow net forming manner; C), overlapping the short fiber net and the long fiber net toform a double-layer composite fiber net; and D), performing saturated impregnation, drying and consolidation treatment on the double-layer composite fiber net to obtain the plant fiber film. Accordingto the preparation method, through the design of the composite film forming process, the technical problems that in the prior art, long fibers cannot be put on a machine, short fibers such as straw fibers and hemp velvet cannot be used, and the product quality is unstable are solved; a large amount of low-cost short fibers are used, so that the air permeability of a plant fiber agricultural filmis reduced, and the heat preservation effect is enhanced; and the production efficiency and the product yield of the plant fiber agricultural film are improved, and the production cost can be greatlyreduced through filling use of low-cost waste fibers such as straw fibers and hemp velvet.