§ Mr. Hardyasked the Paymaster General if he will list the circumstances in which the use of polyurethane is permitted in underground mining operations; and what representations he has received seeking approval for the use of this material underground.
§ Mr. TrippierThe use of polyurethane as a sealant in mines operated by British Coal is prohibited by NCB production instruction 1968/3. Its use in other circumstances is subject to the approval of a working group set up for this purpose by NCB producation instruction 1976/1. The working group has approved the use of polyurethane in personal protective equipment and as a filling for pneumatic tyres.
370WHer Majesty's mines inspectors advise against the use of polyurethane at other mines, and this advice is accepted.