The role of glass fiber mesh cloth for magnesium oxide board

The role of glass fiber mesh cloth for magnesium oxide board

Fiberglass mesh is made of glass fiber woven fabric as the base material, coated by polymer anti-emulsion soaking. It has good alkali resistance, flexibility and high tensile strength in the warp and weft direction, and can be widely used in internal and external walls of buildings for thermal insulation, waterproofing, fireproofing and anti-cracking. Glass fiber mesh fabric is mainly alkali-resistant glass fiber mesh fabric, which is made of medium alkali-free glass fiber yarn (the main component is silicate, good chemical stability) twisted by a special organizational structure – leno organization, and then heat-set by alkali-resistant liquid, reinforcing agent and other high temperature treatment.

Mesh cloth is woven with medium alkali or alkali-free glass fiber yarn, coated by alkali-resistant polymer emulsion glass fiber mesh series products: alkali-resistant GRC glass fiber mesh, alkali-resistant wall reinforcement, mosaic special mesh and stone, marble backing mesh cloth
Main uses are widely used in.
1) Wall reinforcement materials (such as glass fiber wall mesh, GRC wall panels, EPS interior and exterior wall insulation panels, gypsum boards, etc.)
2) Reinforced cement products (such as Roman columns, flue, etc.)
3) Granite, mosaic special mesh, marble backing mesh
4) Waterproof membrane cloth, asphalt roofing waterproof.
5) Reinforced plastic, rubber products skeleton material.
6) Fireproof board.
7) Sanding wheel base cloth.
8) Geogrid for highway pavement.
9) Seam tape for construction, etc.

  1. Good chemical stability. Resistant to alkali, acid, water, cement, and other chemical corrosion; strong bonding with resin, easily soluble in styrene, etc.
  2. high strength, high modulus, light weight.
  3. good dimensional stability, hard, flat, not easy to shrink deformation, good positioning.
  4. Good toughness. Impact resistance is good.
  5. Anti-mold, anti-insect.
  6. Fireproof, heat preservation, sound insulation, insulation.

Glass fiber as magnesium oxide plate production essential reinforcing material, it is added to the use of magnesium oxide plate products with higher strength and bending strength, and more stable physical and chemical properties. But in the use of glass fiber to do enhanced materials must pay attention to the following points.

One, high alkali glass fiber
First of all, let’s talk about high alkali glass fiber, high alkali glass fiber in contact with water, the fiber Na2O, K2O will form NaOH, KOH and other products and glass fibers play a skeletal role of SiO2 reaction, the destruction of the structural composition of glass fibers, coupled with the defects and cracks on the surface of high alkali glass fiber, alkaline crystalline product deposition will destroy the interface bonding, will make the glass fiber completely lose Strength, the magnesium chloride material will not play a reinforcing role, may also cause the use of the product of the project accident problems. Therefore, high alkali glass fiber is absolutely not used in the production of magnesium oxide products.

Second, dewaxing

Therefore, in the production of magnesium oxide material products, should be used in alkali or alkali-free glass fiber, but pay attention to should choose no wax enhanced glass fiber or glass cloth, because the wax infiltrant contains paraffin, petroleum jelly, stearic acid, transformer oil, surfactant and water. They adhere to the surface of the fiber will weaken the bonding force of magnesium oxide material. The use of such glass fibers generally need to remove the infiltrant, and dewaxing treatment methods are two, one is the solution washing method, that is, with soapy water boiled 4h after washing with water, after drying can be used. Second, the heat treatment method, that is, after heat treatment, the use of continuous heat treatment, that is, 350 ℃ / 6s, but also in 350 ~ 450 ℃ / 3 ~ 6min, until the glass fiber is golden yellow, this method is effective, is the common method of dewaxing.

Third, abrasion resistance and moisture
Glass fiber wear resistance and abrasion resistance and folding resistance is very poor, subject to friction and twisting and folding, the fiber is easily injured and broken. The presence of water attached to the fiber surface can accelerate the expansion of micro-cracks when the fiber is subject to friction, so that the fiber wear resistance and twist resistance is further reduced. Due to the above shortcomings of glass fiber, attention should be paid to the glass fiber and fabric used in the storage and transportation process should avoid suffering from friction and moisture.

Fourth, warp and weft density
As a reinforced glass cloth, should pay attention to the warp and weft density, not too dense, otherwise it is not conducive to the penetration of magnesium condensate, the formation of “glue nail” effect, and affect the bonding force, warp and weft density is generally 6 × 4, 6 × 6 or 8 × 8, the thickness of 0.1 ~ 0.4mm is appropriate, at most not more than 0.5mm.

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