6F 47: 1983 pdf download.Cotton tape.
1. Scope This British Standard coecifles the requirements for cotton tapes for aerospace purposes in a range of widths. NOTE 1. The titls of the publications roferred to In this standard are lIsted on the Inside back pago. NOTE 2. The latest revision of on Aerospoce Serles standard is indicatod by a preflx number.
2. General requirements In addition to the requirements specified in clauses3 to 7 of thls standard the relevant clauses of sections one and two of the latest edition of British Standard F 100 shall apply.
3. Yarn The tape shall be manufactured from unsized cotton yarns of nominal counts as follows: (a) warp: 2 ply yarn of resultant count 20 tex; (b) weft: 17 tex count singles.
4. Manufacture The weave shall be plain. Shuttleless constructions shall not be permitted.
5. Finish 6.1 General. The tape shall be supplied in one of the following conditlons, as specified in the contract or order; (旧) loomstate; (b) scoured and rotproofed; (c) scoured, dyed and rotproofed.
5.2 Dyoing. The tape colour shall be specified in the contract or order, if possible by reference to an official standard, e.g. BS 381C, or otherwise by pattern. Either the tape or the yarns from which it is to be constructed shall be dyed.
5.3 Rotproofing. Where tape rotproofing is specifled, the tape shall be treated with pentachlorophenyl laurate (PCPL) in accordance with 8.7 of BS 2087 : Part 1 : 1981 and using the normal process, except that the upper limit for PCPL content shall be 3.5 %.
6. Construction and properties Tapes whose widths are multiples of 5 mm shall comply with the requirements given in table 1.
Tapes with 13, 32 and 38 mm widths shall comply with the requirements given in table 2.
7. Marking The tape shall be identified by the number of this British Standardt, together with the width, and, where required, the colour and rotproofing requirements of clause 5. For example, 50 mm wide tape dyed blue-grey and rot-proofed shall be identified as British Standard 6F 47/50 mm/blue-grey/PCPL'.6F 47 pdf download.