做采购和工程的人，拿到一款PVC瓦，最想知道的就是它到底结不结实、耐不耐用。光听销售讲没用，得看实实在在的性能数据。
我做了这么多年屋面材料，今天就拿几个关键指标跟大家拆解一下，PVC瓦到底好在哪，哪些数据是必须盯住的。
先说防火性能。厂房、仓库这些地方，消防是头等大事。PVC Roof Tiles之所以被大量用在工业建筑，一个核心原因就是它阻燃。按照国家标准，合格的PVC瓦属于B1级难燃材料。什么意思呢？就是你把火源拿开，它自己会在几秒钟内灭掉，不会持续燃烧，也不会像普通塑料那样滴熔滴助长火势。很多客户问，那万一车间着火怎么办？PVC瓦至少不会成为“帮凶”。有些劣质瓦为了降成本，钙粉加太多，阻燃性大打折扣，一点就着，那种千万别买。
再说耐腐蚀。这个指标主要看它在酸碱盐环境下的表现。好的anticorrosive tiles（也就是PVC瓦的一种）做过第三方检测，在浓度60%以下的硫酸、盐酸，或者饱和盐水里泡上24小时，表面不起泡、不变色、重量变化微乎其微。所以化工厂、电镀车间、养殖场（氨气腐蚀）都愿意用它。相比之下，彩钢瓦在这种环境里撑不过半年就锈穿了。
抗冲击性能也很关键。尤其是冰雹多发区或者安装时有重物掉落的风险。国标里有落锤冲击试验——用1公斤的钢球从1米高度自由落下砸瓦面，合格的PVC瓦不会开裂，最多留个白点。有些厂家甚至能做到2米不裂。这里要提醒一句，抗冲击能力跟厚度成正比，也跟配方有关。纯料做的韧性好，回收料做的脆，一砸就碎。所以买瓦的时候，别只看厚度，还要问清楚是不是新料。
还有隔热和隔音。PVC瓦的导热系数大约在0.22到0.325 W/(m·K)之间，而彩钢瓦的导热系数在50以上。差了两个数量级。夏天阳光暴晒，彩钢瓦下面像烤箱，PVC瓦下面温度能低4到8度。隔音方面，大雨落在PVC瓦上的噪音比彩钢板低30分贝以上，这个差异非常明显，耳朵能直接听出来。很多老板换瓦之后，第一反应就是“终于不用打雷一样吵了”。
最后说使用寿命和耐候性。好的PVC瓦在户外用上十年以上，颜色变化不大，表面不粉化，机械性能保留率还在80%以上。这得益于表面那层ASA（丙烯腈-苯乙烯-丙烯酸酯共聚物）材料，它能抗紫外线、抗老化。有些低端瓦为了省成本，ASA层很薄甚至没有，半年就褪色发白，两年就脆裂。
综合这些指标，你就能明白为什么越来越多的项目指定用PVC瓦。当然，前提是找对PVC Tile Manufacturers。指标是死的，但选对了厂家，这些指标才是真的。
PVC Roof Tiles
高益PVC瓦介绍：
Keywords: PVC tiles, PVC plastic tiles, PVC high pit tiles, UPVC tiles
[Product Characteristics
Offers a 25-year warranty and 10-year colorfastness.
pvc tiles/PVC tiles/ASA-PVC tiles are made of anti-aging scientific formula, with PVC as the main raw material and mixed with UV anti-ultraviolet extrusion, shielding extrusion, antioxidants, modifiers and other super weathering chemical materials. It is produced by European advanced co-extrusion technology. It can convert the UV light energy of sunlight into heat energy and release it, block the oxidization reaction between air and material and add shielding material in the core layer to prevent the penetration of light again, thus greatly extending the service life of the tile.
- Excellent corrosion resistance
As a modified plastic, it has the corrosion-resistant properties of plastic itself. It has no chemical reaction when immersed in alkali, salt, and acids up to 60% for 24 hours. Ideal for corrosive plants, acid rain prone areas and coastal areas.
- Good soundproofing
The composite co-extruded core layer shielding structure greatly reduces the spread of sound. In the wind, rainstorms and other external noise impact, has a very good noise absorption effect, than the color plate noise drop of more than 30dB.
- Strong fire resistance
The fireproof performance is tested by the national fire prevention department ≥ B1 level, which is a flame retardant material.
- Excellent water resistance
Dense and non-absorbent, large sheet area reduces roof seams.
- Excellent load resistance
It has good loading performance, and does not produce damage and breakage phenomenon in low-temperature areas under year-round snow accumulation. Tested using 2.0MM thick UPVC tile in the support spacing 600MM under the case of loading 100KG, tile will not produce cracks damage phenomenon.
- Excellent thermal insulation performance
The coefficient of thermal conductivity is 0.325W/M.K, which is about 1/310 of clay tile, 1/5 of cement tile and 1/2000 of color steel tile. At the same time, it is full-shading, which greatly improves the heat insulation performance. The experiment proves that the heat insulation effect is 3~4℃ lower than the color steel plate.
- Good impact resistance
Strong impact resistance. Tested: 1 kg steel ball dropped freely from a height of 3.0 meters without cracking.
- Particularly good insulation
It is an insulated product and will remain intact in the event of an accidental discharge. It is a safer alternative to metal tiles in thunderstorm areas and near high voltage lines.
- green
It does not contain asbestos and radioactive elements and is recyclable, which is fully in line with the requirements of green environmental protection.
