The invention relates to a chemical field, and relates to a preparation method and application of a water glass modified
fiber. The preparation method comprises the following steps:
grinding dry
plant straw or wood slices with barks, spraying a
coupling agent into a coarse blend
fiber under a vacuum stirring condition, continuously stirring, pressurizing and stirring; then decompressing and vacuumizing, spraying a mixture after water glass is mixed with a water glass coagulating agent, and maintaining vacuum stirring; then pressurizing and stirring; slowly decompressing, then putting in a
fluidized bed for
drying, obtaining a primary modified
fiber after
drying, spraying the
coupling agent into the primary modified fiber, and uniformly mixing to obtain a secondary modified fiber. A
high density board produced by using the modified fiber has the advantages of
high density, high strength, small using amount of
adhesive and fiber saving, a great number of
plant straw smashed fibers can be used, the production cost is greatly reduced, meanwhile the board quality is improved, no waste water or waste residue is discharged in the production process, and the environment is protected; therefore, the water glass modified fiber has great popularization values.