Fibres long-length

Long Chopped Fibres These are chopped fibres with lengths up to 50 mm. They are used mainly in the manufacture of SMC and DMC (see Section 4.10.2). 

As an alternative to planar waveguiding structures we report here the fabrication of crystal cored fibres in which it is possible to maintain uniform guide dimensions over long lengths. These fibres with organic crystal core material having large second order non-linearity could be used for miniaturization of visible laser sources and realization of parametric amplifiers for optical communications. 

The long length fibres link the ventral tegmental and substantia nigra dopamine-containing cells with the neostriatum (mainly the caudate and the putamen), the limbic cortex (the medial prefrontal, cingulate and entorhinal areas) and with limbic structures such as the septum, nucleus accumbens, amygdaloid complex and piriform cortex. These projections are... 

Anon., Production of long lengths of carbon fibres at Harwell, Rubber and Plastics Age, 797, Sep 1968. 

Most composites made using jute exploit the long fibre strand length. Commercially, both woven and non-woven jute textiles are resin- or epoxy-impregnated and moulded into fairly complex shapes. In addition, jute textiles are used as overlays over other composites. Jute stick is used for fuel, and in poor areas it is stacked on end, tied into bundles, and used as fences and walls. 

Mitsunaga Y, Katsuyama Y and Ishida Y, Reliability assurance for long-length optical fibre based on proof testing , Electron. Lett., 1981, 17, 568-71. 

The major processes are listed in Table 11.1 injection moulding is not considered further because of the restriction in this book to long length fibres. 

The naturally fibrous materials all have fibres that are extremely long by comparison with their diameters, except in the case of wood cellulose, where the manufacturing process produces fibres whose lengths are measured only in millimetres. 

The remainder of the natural fibres have lengths measured in centimetres, and can be over 30cm long in the case of wool, while silk can be produced as a single filament. The synthetic materials are actually produced as continuous filaments, which can then be cut or broken into fibres of any length. 

The repeat length in the triclinic polymer crystals (75.3 nm) is significantly less than for PBT (86.3 nm) and PET (99.5 nm). This has been claimed to make the crystal more spring-like in the long axis resulting in enhanced resilience and wear resistance in carpet fibres to a level approaching that of polyamide fibres. 

It is important to model a correlation spectroscopy system, firstly to predict performance, and also to aid the very important choice of optical filter (or choose the best LED or super-luminescent optical fibre source to give the optimal spectral output), in order to achieve the best detection performance or best selectivity possible. The length of the cells and the pressure of gas (or gas concentration) are also important parameters (although all simulated results described below are based on use of lm long cells). 

As will be shown in Sect. 3, Yoon derived the following expression for the ultimate strength of a polymer fibre with long and parallel oriented chains of finite length... 

In softwoods, the main cell type is the tracheid, which is often mistakenly referred to as a fibre. Tracheids constitute over 90% of the volume of most softwoods, and are the principal paper-making cells of softwoods. Their average length is usually between 2 and 4 mm, with a lengthrwidth ratio (aspect ratio) often in excess of 100 to 1, but there is a wide distribution of tracheid lengths, and it is possible for some to be as short as 1 mm and for others to be as long as 5 mm (Table 2.1). The lumen, or central cavity, is several times wider than the cell wall thickness. There is also a difference between spring wood (i.e. cells synthesised in the early part of the annual... 

LFRT (long fibre reinforced thermoplastics) are reinforced with fibres about 2 cm long, far from the length of continuous fibres. Practically all the properties are influenced by the addition of fibres. The most significant parameters are ... 

---