rPET Staple Fiber length
rPET staple fiber length, a property of staple fibre, is a term referring to the average length of a group of fibres of any composition. Staple length depends on the origin of the fibres. Natural fibres (such as cotton or wool) have a range of lengths in each sample, so the staple length is an average. For synthetic fibres which have been cut to a certain length, the staple length is the same for every fibre in the group.
Staple length is an important criterion for spinning fibre, as shorter fibres are more difficult to spin than longer ones, so staple length varies from short to longer length fibres, short fibers also resulting in more hairy yarns.
For cotton and wool, staple length was originally tested by hand, the tester removing a clump of fibre and then arranging it on a dark cloth for measurement. In the 1970s, machines were invented to do this task, taking around 5 minutes for cotton and for wool around 20 minutes. Today, machinery can take the measurement in seconds.
Hadtex’s rPET staple fiber are made from various polyester materials such as polyester filament and PET bottle. In the first stage of production they are chopped into smaller pieces or flakes, and then are melted, and extruded to form fibers in various deniers pet-bottle-1 mainly 6 and 15 denier.
These fibers then are crimped, cut, drawn and stretched into desired length and then packed into bales.
The baled fiber can be used for a large number of end applications in various industries. mainly filling, insulation, filtration and non-woven ( such as needle punched non woven for geotextiles, building construction etc.
Our annual capacity : 24,000 tons