28 Sep 2020
September 28, 2020

Wood fiber

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Wood fiber is widely used in dry powder mortar, such as tile adhesive, jointing agent, dry powder coating, interior and exterior wall putty, interface agent, insulation mortar, anti-cracking plaster mortar, waterproof mortar and plaster plaster. Because wood fiber is a natural fiber insoluble in water and organic solvents, it has excellent flexibility and dispersibility. Adding appropriate amounts of wood fibers of different lengths to dry powder mortar products can enhance the shrinkage resistance and crack resistance, improve the thixotropy and sag resistance of the product, extend the opening time and play a certain thickening role.

Wood fibers have different lengths, ranging from 10-2000 microns in length. Wood fibers of different lengths are used in different dry powder mortar products. Longer wood fibers tend to have a “carpet” effect in the system after curing. Because wood fiber products are non-toxic and harmless, they are often used as substitutes for asbestos products, and the amount of addition is only 30% -50% of the normal asbestos addition. In addition, wood fiber also has a certain high temperature resistance, acid and alkali resistance and frost resistance, so it is widely used.

Fiber reinforcement and thickening effect. The wood fiber has a three-dimensional network structure with obvious cross-linking effect. This structure can effectively adhere to liquid structures such as water, latex, asphalt and other liquids of different consistency. Its thickening depends on the length of the fiber. The longer the fiber, the thicker it is The greater the effect. Due to the particularity of its structure, it can completely replace asbestos products. Improve workability. When the shear force acts on the three-dimensional network structure of wood fiber, such as scraping, stirring, pumping, etc., the liquid absorbed in the structure will be released into the system, the fiber structure will change and move along the direction of movement Arrangement, resulting in reduced viscosity and improved workability. When the shearing force stops, the fiber structure returns to the original three-dimensional network structure and absorbs the liquid to return to the original viscosity state.