High tenacity viscose

It is generally accepted that, all other things being equal, the lower the secondary creep, the better the fiber is in terms of wear, shape retention, and crease resistance. This does not mean that glass, which has no secondary creep, is better in abrasion resistance than high tenacity viscose rayon, which has secondary creep, because the respective energy absorption capacities of these two materials, exclusive of secondary creep, are not equal. Nor does it mean that fibers that exhibit secondary creep are of no value. For fabrics to meet the requirements of wear, crease resistance, and shape retention, the load and extension yield points should not be exceeded during use. 

Most technical yams for reinforcement are based on continuous multifilament yams having linear densities typically in the 1100 dtex (1000 denier) region in singles or doubled configurations. The number of filaments per yam will vary between about 140 and 200 for melt-spun nylon 6.6 and polyester to >500 for high tenacity viscose and other wet-spun fibres, including the aramids. For instance, Kevlar 29, suitable for rubber reinforcement, is available as a 1670 dtex yam with 1000 filaments. "... 

Cotton Cuprammonium Regular rayon viscose rayon High-tenacity viscose rayon Saponified acetate rayon Cellulose acetate (secon- dary) Cellulose tri- acetate... 

The dry strength of regular-tenacity viscose and cuprammonium rayons are lower than that found for cotton, whereas high-tenacity viscose, poly-nosic, and saponified cellulose acetate rayons are significantly stronger than cotton. All rayons lose strength when wet and are more susceptible to damage while wet. 

High-tenacity viscose cord rayon Viscose tire cord... 

High tenacity, low elongation viscose High tenacity, deacetylated cellulose 4.9 7.4 15.0... 

High tenacity, tire cord yarn viscose 3.7 9.7 27.0... 

Lubrication of the faying surfaces with low-viscosity, high-tenacity oils and greases to exclude direct contact with air. This is an adequate but not complete remedy. Phosphate conversion coatings of steels, for example, are used in conjunction with lubricants since they are porous and provide oil reservoirs.16... 

Interest in the manufacture of different forms of rayon has resulted in the production of regular rayon, hollow viscose, spun-dyed filaments and staple rayon, crimped rayon and surface modified fibers, high tenacity rayon and high wet modulus (polynosic) rayon fibers. In chemical composition, viscose rayon and cotton are alike they are both cellulose. 

The differences between regular and high-tenacity rayon are to be found in the degree of degradation of the cellulose which has occurred during preparation of the viscose, the degree of crystallization, the size of the crystallites, the degree of orientation and the fine structure and uniformity of the filament. 

HT viscose High tenacity and Low work of Tyres car, trucks. 

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