ETFE Pall ring

ETFE Pall ring is versatile. This product was advanced on the basis of Plastic Raschig Ring, and compared with it, both of them have similar cylindrical dimensions but the Plastic Pall Ring has two rows of punched out holes, with fingers or webs turned into the centre of the cylinder, which significantly increases the performance of the packing, in terms of throughput, efficiency and pressure drop.

ETFE 鲍尔环 乙烯-四氟乙烯共聚物是一种化学物质，ETFE 是最强韧的氟塑料，它在保持了PTFE 良好的耐热、耐化学性能和电绝缘性能的同时，耐辐射和机械性能有很大程度的改善，拉伸强度可达到50MPa，接近聚四氟乙烯的2倍。

乙烯-四氟乙烯共聚物的英文为：ethylene-tetra-fluoro-ethylene，英文简称为：ETFE，俗称：聚氟乙烯，又俗称：F-40。

性质	PTFE	PFA	FEP	ETFE	ECTFE	PVDF	PCTFE
相对密度	2.18	2.15	2.15	1.74	1.68	1.77	2.13
拉伸强度/MPa	14-48	28-31	19-35	42-47	41-54	31-43	36.5
断裂伸长率/%	200-450	280-400	250-330	420-460	200-300	300-450	150
熔点/℃	327	305	260	267	240	171	212
最高连续使用温度/℃	260	260	200	150	150-170	130	132
10Hz	2.1	2.1	2.1	2.6	2.5	7.72
介电常数
106Hz	2.1	2.1	2.1	2.6	2.59	6.43
耐化学溶剂	极好	极好	极好	极好	极好	很好	好
极限氧指数	>95	>95	>95	31	60	43	100