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网格布是否为石棉制品？
Is the grid cloth an asbestos product?
该网格布是石棉制品的。
This grid cloth is an asbestos product.
1、材质不同：玻璃纤维是一种性能优异的无机非金属材料，石棉又称"石绵"是天然的纤维状的硅酸盐类矿物质的总称。
1. Different materials: Glass fiber is an excellent inorganic non-metallic material, while asbestos, also known as "rock wool", is a general term for naturally occurring fibrous silicate minerals.
2、耐酸性不同：石棉具耐酸、耐碱和耐热性能，又是热和电的不良导体。其中蛇纹石石棉的耐碱性能较好，几乎不受碱类的腐蚀，但耐酸性较差，很弱的有机酸就能将石棉中的氧化镁析出，使石棉纤维的强度下降。玻璃纤维一般只被浓碱、氢氟酸和浓磷酸腐蚀。
2. Different acid resistance: Asbestos has acid resistance, alkali resistance and heat resistance, and is also a poor conductor of heat and electricity. Among them, serpentine asbestos has better alkali resistance and is almost not corroded by alkalis, but its acid resistance is poor. Very weak organic acids can precipitate magnesium oxide from asbestos, reducing the strength of asbestos fibers. Glass fiber is generally only corroded by concentrated alkali, hydrofluoric acid and concentrated phosphoric acid.
3、拉伸强度不同：石棉纤维的轴向拉伸强度较高，由石棉纤维制成有时可达374×10^4㎏/㎡，但不耐折皱，经数次折皱后拉伸强度显著下降。玻璃纤维最大的特征是抗拉强度大。抗拉强度在标准状态下是6.3～6.9 g/d，湿润状态5.4～5.8 g/d。密度2.54g/cm3。耐热性好，温度达300℃时对强度没影响。
3. Different tensile strength: The axial tensile strength of asbestos fiber is relatively high, and products made from asbestos fiber can sometimes reach 374×10^4 kg/㎡, but they are not resistant to folding, and the tensile strength decreases significantly after several folds. The most notable feature of glass fiber is its high tensile strength. The tensile strength is 6.3～6.9 g/d under standard conditions and 5.4～5.8 g/d in wet conditions. The density is 2.54g/cm3. It has good heat resistance, and its strength is not affected at temperatures up to 300°C.
