Surface finishes Other alternatives

Polyamide-6 (Nylon-6, Perlon) and polyamide-6.6 (Nylon-6.6) are the most well known polyamides. Polyamide-based filaments find wide spread applications as yarns for textile or industrial and carpet materials [70], However, nylon-based textiles are uncomfortable to wear and difficult to finish due to their hydrophobic character. This characteristic also leads to fouling of PA-based ultrafiltration membranes by proteins and other biomolecules which increases the energy demand for filtration and requires cleaning with aggressive chemicals or replacement [71-73], Consequently the enhancement of the hydrophilicity of nylon is a key requirement for many applications and can be achieved by using plasma treatment [74-76], As a promising alternative, enzymatic hydrophilization of PA requires less energy and is not restricted to planar surfaces. 

Center lines are fine lines composed of alternate long and st ort dashes which are used to represent axes of symmetrical parts and which serve as extension lines m the location of holes or other Similar features important dimensions should not be referred to a center Pme that has no finished hole on it or has no finished Surface comciding with it... 

At the beginning of this chapter, it was stated that the cheap BF can be used as an alternative of GF (the price of BF is ca. one third that of GF), since they have almost the same strength properties and density. However, BF is a less efficient reinforcement than GF if it is not treated (finishing, surface coating, etc.) accordingly. On the other hand, attention should be paid to the fact that the melt-blown BF used belongs to the low quality BF versions. 

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