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The Standard of Fiberglass Mesh

The Standard of Fiberglass Mesh

[date2015/8/6] [hot]

 

The Standard of Fiberglass Mesh
 
The current technical standard of exterior wall Insulation (JG149-2003): for the warp and weft of fiberglass mesh, alkali resistance tensile fracture strength shall not be less than 750N/50mm and alkali resistant tensile fracture strength retention ratio shall not be less than 50%, weight per square meter130 grams. But standard JG158-2004 the warp and weft of fiberglass mesh, alkali resistance tensile fracture strength shall not be less than 1250N/50mm, alkali resistance tensile fracture strength retention ratio shall not be less than 90%, weight per square meter 160 grams.
At present, fiberglass mesh used for the exterior insulation and finish systems in China's market, weight per square meter is about 130g, the intensity is generally low, the normal breaking strength is only 1000N/5cm, or even lower. Therefore, the technical indexes of fiberglass mesh used for exterior insulation project requires standardization, we need to confirm it qualified before use. In control of cracks in external wall insulation, insulation materials have not only requires a certain tensile strength and ultimate tensile, also requires the anti crack protective layer material must have sufficient tensile strength. So when we choose fiberglass mesh, it is necessary to pay attention to the tensile strength whether it is up to the standard.
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