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FRP采光板

多色玻璃钢瓦

2017/10/16 9:39:19   来源:本站    点击:   

 玻璃纤维聚酯采光板(FRP)与玻璃卡布隆(PC)板之性能比较 
1、FRP的基材为间苯二甲酸聚脂,PC板为普通聚碳酸脂;   
2、FRP的热膨胀系数为2.2×10-5 /cm/cm /℃,PC的热膨胀系数为6.75×10-5/cm/cm/℃;FRP的热膨胀系数接近钢材的热膨胀系数,由冷热变化而引起的相对位移较少,不易因变形而漏水。而PC板引起的相对位移过大,引致螺钉孔周缘板撕裂、变形而漏水。 
3、FPR的拉力强度较高,为94MPa能承受与钢板相近的较高荷载,抗台风能力较强。PC的拉力强度为60MPa,承受荷载的能力弱,与钢板承受荷载的能力相差较大,抗台风能力弱。 
4、FRP采用上下膜与玻纤加强的结构形式,使其抗拉撕裂性能较好。PC其分子结构的特殊性致使PC板的抗撕裂性能差,容易被金属的毛刺刺裂而漏水,所以不能只用螺钉来固定,以及与金属直接接触,固定PC板通常采用铝压板。  
5、FRP的采光率为50 - 85,PC的一般为85 - 91。  
6、FRP的热传导率为0.158w/m.k,PC的为0.166w/m.k,FRP的隔热性能胜于PC板; 
7、FRP的施工成本因板材的拉力强度、钢度较高承受荷载能力较强,能与钢板配合在太跨度大檀距的钢结构屋面上使用。PC的板材钢度差以及热胀冷缩系数大,所以需采用小分格小檀距或凸拱起弧增加强度,不适合用于大檀距的钢结构屋面上否则容易凹下面积水、漏水。
Performance comparison between glass fiber polyester daylighting panel (FRP) and glass fiber reinforced polymer (PC) panel
1. The base material of FRP is isophthalic acid polyester, and the PC board is ordinary polycarbonate;
2. The coefficient of thermal expansion of FRP is 2.2 × 10-5 /cm/cm / ℃, thermal expansion coefficient of PC is 6.75 × 10-5/cm/cm/℃; The thermal expansion coefficient of FRP is close to that of steel, and the relative displacement caused by cold and heat changes is less, so it is not easy to leak water due to deformation. The relative displacement caused by the PC board is too large, which leads to tearing, deformation and water leakage of the plate around the screw hole.
3. FPR has a high tensile strength of 94mpa, which can bear a higher load similar to the steel plate, and has a strong typhoon resistance. The tensile strength of PC is 60MPa, and its load bearing capacity is weak, which is quite different from that of steel plate, and its typhoon resistance is weak.
4. FRP adopts the structural form of upper and lower films and glass fiber reinforcement, so that its tensile tearing performance is better. The particularity of PC molecular structure leads to poor tear resistance of PC board, which is easy to be punctured by metal burrs and water leakage, so it can not be fixed only with screws and in direct contact with metal. Aluminum pressing plate is usually used to fix PC board.
5. The daylighting rate of FRP is 50 - 85, and that of PC is generally 85 - 91.
6. The thermal conductivity of FRP is 0.158w/m.k, that of PC is 0.166w/m.k, and the thermal insulation performance of FRP is better than that of PC board;
7. The construction cost of FRP is high due to the tensile strength, high rigidity and strong load-bearing capacity of the plate. It can be used on the steel structure roof with too long span and large spacing together with the steel plate. Due to the poor rigidity and large coefficient of thermal expansion and cold shrinkage of PC plates, it is necessary to use small grid spacing or convex arch arcing to increase the strength. It is not suitable for steel structure roofs with large spacing, otherwise it is easy to accumulate water and leak water under the concave.

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