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BS 5F 118:2002 50 g/m2 nylon parachute fabric, 2002
- BRITISH STANDARD AEROSPACE SERIES [Go to Page]
- Committees responsible for this British�Standard
- Contents
- 1 Scope
- 2 Normative references
- 3 Terms and definitions [Go to Page]
- heat ageing
- intermingle
- 4 General requirements [Go to Page]
- 4.1 In addition to the requirements specified in Clause
- 4.2 The breaking force and elongation at break of the yarn (see�
- 4.3 The yarn twist shall be determined in accordance with BS�EN�ISO�2061, except that the number ... [Go to Page]
- General requirements (given in BS�F�100)
- 5 Yarn [Go to Page]
- 5.1 Type
- 5.2 Properties [Go to Page]
- Yarn twist
- 6 Manufacture [Go to Page]
- 6.1 The weave shall be plain.
- 6.2 In fabric�1302 a single black thread, the same count as the warp ends, shall be included in t...
- 6.3 When fabric woven as 1302 is used to produce fabric�1307, the black identifying thread shall ...
- 7 Finish [Go to Page]
- 7.1 General
- 7.2 Dyeing
- 7.3 Calendering
- 8 Construction and properties of finished fabric [Go to Page]
- 8.1 When tested in accordance with
- 8.2 The minimum usable width of the finished fabric shall be 920�mm unless otherwise stated by th... [Go to Page]
- Construction and properties of finished fabric
- 9 Permeability [Go to Page]
- Permeability requirements
- 10 Water extractable matter
- 11 Identification
- (informative) Information to be supplied by the purchaser [Go to Page]
- (informative) Information to be supplied by the purchaser
- (normative) Heat ageing test [Go to Page]
- (normative) Heat ageing test
- Principle
- Apparatus [Go to Page]
- Tensile testing machine
- Laboratory oven
- Suitable timer
- Wrap wheel
- Heat-resistant gloves
- Means of suspending the yarn samples in the oven
- Tie-on labels
- Conditioning and testing atmosphere
- Test specimens [Go to Page]
- Unwrap and discard the surface layers from each package to be tested.
- Using the wrap wheel, run off from each package sufficient yarn to carry out five tests.
- Tie the free ends together to form a skein, release the retractable arm of the wrap wheel, and re...
- Double the skein and attach a label noting the specimen reference.
- Repeat
- Procedure [Go to Page]
- Set the oven temperature to (180 ± 2)�°C.
- For the yarn that is to be heated, suspend each folded skein from a bulldog clip on the rod, or f...
- When the oven is at the required temperature, open the oven door, immediately insert the rod or h...
- Start the timer.
- After (60 ± 1) min, put on heat-resistant gloves, open the oven door and remove the rod or frame.
- Hang the skeins to condition in the standard atmosphere for testing defined in
- Using one of the following sets of conditions, determine the breaking strength of the unheated an...
- Record the breaking strength in newtons to the nearest 0.1�N.
- Calculation and expression of results [Go to Page]
- Calculate the mean breaking strength for the unheated control sample and for the heated sample in...
- Calculate the percentage strength loss as follows:
- Report [Go to Page]
- Report the percentage strength loss of the material tested to the nearest 0.1�%.
- Report the test conditions used (see [Go to Page]