| Summary: | 碩士 === 國立臺北科技大學 === 有機高分子研究所 === 105 === The application of polyester fabric has been increased from 1% to 55% by the global market from 1960 to 2015 by Preferred Fiber Market Report 2016。Polyester fibers are usually dyed with disperse dyes. Disperse dyes are hydrophobic dyes that they are not easily washed with hot water. The dyestuff is dyed incomplete in the dyeing process of fabric. In order to improve polyester fabric’s washing fastness, apply the reduction cleaning, it can reaction carbonyl, ether bond, etc., and produce an acid or an alcohol are contained hydrophilic group which could be removed easily. By the reduction of the fiber surface to restore the surface color to colorless state, and improve its fastness.
Sodium Hydrosulfite（Na2S2O4）usually applied in reduction cleaning, because Sodium Hydrosulfite（Na2S2O4）is cheaper and also can help improve dyed fibers’ washing color fastness. However, due to some disadvantage such as not easy to storage, relatively unstable and tends to react with oxygen, and environment pollution, For environment and safe some reducing agents are replacing Sodium Hydrosulfite.
In this dissertation, use four kinds of reducing agents for study, use Oxidation-Reduction Potential to research reducing agents’ stability, in this case can find Reduction RCO is more stable than other reducing agents, Sodium Hydrosulfite should be added Sodium hydroxide will be stable than without add Sodium hydroxide. Polyester fabric is dyed with three types of disperse dyes then apply four kinds of reducing agents in reduction cleaning process.
The washing fastness method is AATCC－61IIA, in this case can find Reduction HSA is very good for azo type of disperse dyes it have great washing fastness than other reducing agents.
Use Datacolor 500 UV test color change to compare fabric with reduction cleaning or
non-reduction cleaning, in this case fabric color change are less.
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