Cardanol Biodegradable Anionic Surfactants for Leveling Polyamide dyeing
HONINGLITE™ CES Surfactants are a new generation of high-performance, readily biodegradable specialty Anionic surfactants based on Cashew Nutshell Liquid,a natural and renewable resource .
HONINGLITE™ CES Surfactants are a line of specialty surfactants designed to help formulators meet rising expectations for performance and convenience in the marketplace while complying with rapidly increasing, more stringent environmental and safety regulations.
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the package is 200kgs steel drum
HONINGLITE™ CES types have a shelf life of at least two years in their original packaging, provided they are stored properly and drums are kept tightly sealed.
Leveling for Polyamide dyeing :
Polyamides refer to various natural (polypeptides) and synthetic materials containing free amino groups. Examples of polyamides include nylons, wool, and silk. Nylon fiber is commonly dyed with acid dyes which are anionic in character, including premetallized acid dyes, in a batch process referred to as exhaust dyeing. For example, nylon fiber which has been made into fabric may be dyed in a jet-dyeing machine, whereby a continuous loop of the fabric is circulated throughout the dye bath by impinging the dye bath liquor against the fabric in a venturi nozzle. Care must be taken during the dyeing process to obtain a uniform distribution of dye on the fabric, referred to as leveling.
Since acid dyes are negatively charged, the dyes are attracted to positive dye sites appearing in the targeted substrate. With respect to nylon, positive dye sites can be created by exposing the free amino groups contained within the polymer matrix to an acid. In particular, when exposed to acidic conditions, the amino groups are activated by protonation and become positively charged and cationic. Once positively charged, the acid dyes are strongly attracted to the cationic sites.
In general, acid dyes have a high affinity for protonated polyamide materials, meaning that the dyes have a strong tendency to quickly bind to the polymer. Unfortunately, however, once in contact with the cationic polymer surface, acid dyes have a tendency to poorly diffuse into the polyamide. In other words, acid dyes exhibit such a high rate of strike that they do not diffuse evenly into polyamides. Thus, if the dye is absorbed by the polymer too quickly, the polyamide material can absorb the dye unevenly and not exhibit a constant shade or color. In such cases, anionic leveling agents act by competing for the dye sites and are mainly used to counter-act fiber-oriented unlevelness due to physical and chemical irregularities in the fibre.
HONINGLITE™ CES Surfactants due to its substantivity for nylon fibre, enforces a slow and even rate of absorption which results in excellent penetration and level dyeing.