For instance, they exhibit poor to moderate
fastness properties, lower dye bath exhaustion and less penetration at lower temperatures2 [9, 10].
Archroma developed FadexA(r) AS New to address this challenge, providing textile manufacturers serving the automotive industry with a new, advanced light
fastness improver, especially when used in Archroma's LIGHT FAST CAR system with its DorospersA(r) A and K high-light-fast dyes.
Unfortunately, similar to other heat resistant fibers with an aromatic or heteroaromatic structure, PSA fibers are difficult to be dyed with conventional dyeing techniques due to their low dye up-take and poor color
fastness [4,5], For these kind of heat resistant fibers, although there are some particular dyeing sites such as amide groups (-CO-NH-) on the molecular backbone, the extremely high glass transition temperature ([T.sub.g] 280[degrees]C-380[degrees]C) [6] restricts the movement of molecular chains and hinders the diffusion of dyes from the fiber surface into the interior.
It is designed with the dye structure containing hard segment (chromophore) and soft segment (auxochrome) to get higher dyeing
fastness. The hydrophilic copolymer was designed through CO2-philic/ hydrophilic segment ratio to give dry fit functionality without water.
Unfortunately, these dyes have only moderate dye
fastness [2].
Disperse dyes give excellent overall
fastness properties with polyester whereas basic dyes are water soluble cationic dyes where the coloured part has a positive charge, interacts with the negative group (either carboxyl or sulfonic acid group) of the fibre molecule (Choi et al., 2000).
Chandrababu Naidu on Thursday asserted that the Andhra Pradesh Government is using technology in real time governance to bring
fastness, accuracy and transparency in the state.
Light
fastness, or colour
fastness to light, is the resistance of printed or pigmented materials to fading or colour change due to exposure to sunlight or an artificial light source.
Color
fastness to rubbing, perspiration, and light were determined as per standard test method of ISO 11640, ISO 11641, and EN ISO 105-B02, respectively.
With low VOC, non-yellowing, good light
fastness and excellent chemical resistance, Basonat HW2100 has a balanced profile regarding resistance, reactivity and compatibility with primary and secondary dispersions.
Specialist weaver Sam Weller & Sons, based at Thongsbridge, has been acquired for an undisclosed sum by SDC Enterprises (SDCE), a Bradford-based company which makes colour
fastness testing products.
A variety of additives can then be added to the fibers for improved mechanical strength, coloring, light
fastness, adhesion, and finishing, and reduced flammability.
