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Heald shaft:
- a frame in which a large number of healds are mounted. Typically a loom contains two or more heald shafts, depending upon the complexity of the weave pattern required. The heald shaft is raised or lowered by means of cams or a dobby mechanism to form a shed and to create different weave patterns.
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Heddle:
- another word for heald.
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Hemp:
- a light-coloured, strong bast fibre obtained from the hemp plant Cannabis sativa.
Last referenced in: Composites and Technical Fabrics: The Potential for Flax and Hemp (Technical Textile Markets Issue 72)
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HEPA:
- high efficiency particulate air (filtration).
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Herringbone:
- a broken twill weave giving a zigzag or herringbone effect.
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Heterofilament:
- a filament made up of more than one polymer.
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High loft:
- textiles which are three dimensional, being thick but very light. The term is also applied to the fillings used in outdoor clothing to denote those which retain a large volume of still air.
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Highly oriented yarn (HOY):
- see fully drawn yarn.
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HMPE:
- high modulus polyethylene.
Last referenced in: Fibres for Technical Textiles: Para-Aramids and High Performance Polyethylene (Technical Textile Markets Issue 60)
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HMWPE:
- high molecular weight polyethylene.
Last referenced in: Global Technical Textiles Business Update (Technical Textile Markets Issue 68)
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