Lignin fibre/Wood fiber

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Construction Chemicals

Lignocellulose/Wood Fiber
Lignocellulose is a powdered wood fiber used in construction chemicals and an additive made from wood pulp. It is produced using a large number of renewable natural plants as raw materials. It is a naturally insoluble fiber (as opposed to the water-soluble cellulose ether).

‌Crack resistance improved

The three-dimensional mesh structure inhibits the expansion of mortar cracks, reduces the risk of cracking caused by drying shrinkage, and improves initial and subsequent crack resistance‌. Its capillary water conduction promotes even distribution of water and reduces the formation of drying shrinkage cracks‌.

Water retention and thickening effect

Lignin fibers can absorb 5-8 times their own weight in water. They release water under shear force to optimize workability, while their water-locking properties reduce mortar mobility and slippage and enhance cohesiveness‌.

Mechanical properties enhanced

Improve the tensile strength, toughness and ductility of the mortar, enhance impact resistance and extend the service life of the mortar.

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FAQ

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What is the difference between lignin fibres and polypropylene fibres?
    • ‌Lignin fibres‌
      • ‌Natural origin‌: extracted from wood, the main components are cellulose, hemicellulose and lignin, forming a three-dimensional network structure‌.
      • ‌Biodegradability‌: a natural material that is environmentally friendly, but is vulnerable to attack by microorganisms and needs to be used in conjunction with preservatives‌.
    • ‌PP fibres‌
      • ‌Synthetic origin‌: made from polypropylene, chemically stable, resistant to acid and alkali corrosion‌.
      • ‌Non-degradable‌: long-term stable performance, suitable for projects with high durability requirements‌
Comparison of the mechanisms of action of lignin fibres and polypropylene fibres

‌Resistance to cracking

1, lignin fibres: promote even distribution of moisture through capillary action, reducing drying shrinkage cracks‌; three-dimensional network structure inhibits crack propagation‌

2, PP fibres: form a physical network support, inhibit plastic shrinkage cracks and temperature stress cracks, and improve impact resistance‌

Water retention and thickening

1, lignin fibers: absorb 5-8 times their own weight in water, release water under shear force to optimize workability, strong anti-slip performance‌
2, PP fibers: no significant water retention, need to be used in conjunction with cellulose ether, but better dispersibility‌

‌Mechanical enhancement

1, lignin fibers: improve the tensile strength and toughness of the mortar, but the increase in strength is limited‌
2, PP fiber: significantly improves compressive strength, impact resistance and abrasion resistance, extending the structural life‌

‌Durability

1, lignin fiber: weak weather resistance, prone to degradation with long-term exposure‌

2, PP fiber: resistant to ultraviolet light, freeze-thaw cycles and chemical corrosion, suitable for harsh environments‌

The scope of application of wood fiber in the construction industry

Wood fiber is absorbent but insoluble in water, and its water absorption rate can reach 7 times its weight. It is widely used in gypsum products, exterior wall insulation mortar, water-resistant putty powder, concrete mortar, asphalt roads and other fields. It has a good effect on preventing coating cracking, improving water retention, improving production stability and workability, increasing strength, and increasing surface adhesion.

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