Moreover, an elasticated bedsheet is incredibly easy to put on and take off. The elasticated corners make it simple to tuck the sheet under the mattress, ensuring a neat and tidy appearance The elasticated corners make it simple to tuck the sheet under the mattress, ensuring a neat and tidy appearance
Leather is probably the oldest of the lip materials still in common use, but the move towards mass production methods has seen a massive increase in the development of synthetic rubbers which lend themselves to accurate and repeatable injection and compression moulding. Nitrile (NBR) is still by far the most common elastomer for “normal” use, whilst Viton® (FKM/FPM) is rapidly replacing Polyacrylate (ACM) and Silicone (VMQ) for high-temperature applications. Viton® also has high resistance to abrasion and chemical attack making it a preferred elastomer. Recent developments in the use of PTFE for Rotary shaft seals has caused widespread interest particularly for high-speed shaft rotation or poor lubrication applications.
For more detailed information, please see the following:
Names and functions of seal components
ERIKS