Subject

Item

Requirement

Standard

Color：

White

Diagonals

+/-2mm

Edge Square

Straightness of edges

1.5mm/M

Apparent Density

1050≤ρ≤1150kg/m3

Moisture Content

15-18%  12% after 28days

Bending Strength

18.8Mpa 

10mm≥10mpa  28days JC 688-2006

Impacting Strength

8.3 kJ/m2      JC688-2006 Standard ≥2.0kJ/m2

Nailing strength

86N/ m2       JC688-2006 Standard ≥20 N/ m2

Water Permeability

No obvious moisture or water on the back side

Percentage of dry shrinkage

≤0.3%

Percentage of water swelling

≤0.6%

Content of Chloride ion

≤3-6%

Dehalogenation Resistance

Temperature 32degrees, humidity 96degrees, testing 72 hours, no water and no moisture created (qualified)

Environment

No Radiation, No Asbestos, No formaldehyde

Alkali resistance on surface

No Abnormal Appearance on Surface

Fungal Growth Measurements

No Fungal Growth

Fireproof Performance

Following GB8624-1997 A-level

Edge

90°

Assist-Material

No Objectionable Ingredient, Industry Rubbish, No Injurant wood dust, No venomousness item

Magnesium Oxide

Component

≥50% of total powder material

Content

≥85% Magnesium Oxide Material Content

Active of Magnesium Oxide

Active ≥65

Loss on Burning

Loss on Burning 5-6%

Granularity

≥200

Magnesium Chloride

Content

≥44.50%

≥44.50% Magnesium Chloride Material Content

Other Chemical Composition

Sulfate ion≤2.80%;

Alkali metal chloride≤0.90%

Variety of Modifier

2 type will be use

name: 1:Polyvinyl alcohol

2:Coupling agent

Specially Item

Silicon Dioxide  (20% of total powder material)

Small of（Alkali-resis） Fiber glass will add to mix material（15% of total powder of Mgo）

Fiber Glass Matting

Layer

2 layer

Size of Fiber Matting

Width: 1300mm  Hole:4mmx4mm

Mass per unit area

150g/m² -250 g/m²

Breaking Force

Each layer≥1600N/50mm

Alkali resistance of Retention rate

≥65%

Matting of Alkali Metal Oxides

≤12%

Perlite

Size

Even granulartity:1-2mm  

Wood Dust

Size

60-80   less than 3mm

Matting

Mass per unit area

15g/m²