During the washing and dyeing of denim products, once spandex is degraded and loses elasticity, it is basically irreparable. Therefore, pre-production samples must be prepared to ensure that there will be no quality problems during mass production. According to the specifications of polyurethane fiber Physical and chemical properties: Elastic denim products containing spandex may suffer from elasticity loss during the washing process. This is mainly due to improper process formula or operation during the washing process, which may cause the spandex to break or dissolve, eventually causing elasticity loss.
During the rinsing process, spandex is not resistant to chlorine bleach , Nitrogen-chlorine combination will be formed in the hypochlorite solution, which will damage the fiber. The damage of polyether spandex is more serious. When the water temperature in the tank is too high or the time is too long during rinsing, the spandex will degrade, causing the fabric toMissed bullet. So how to avoid losing bullets during rinsing?
(1) Do pre-production testing;
(2) The bleaching water must be prepared during production. Inject into the cylinder, direct addition is prohibited;
(3) Drifting must be added under equipment rotation conditions water to prevent loss of elasticity caused by excessive local concentration;
(4) When bleach residues remain on clothes and are dried at high temperatures, chlorine is released, resulting in spandex Degradation, pay attention to the cleaning work after bleaching;
(5) Strengthen the management of personnel working online, monitor production status, and prevent quality problems caused by processing temperature or time exceeding process requirements.
When many people face such a high risk of missing bullets I would like to ask, is there a better solution for rinsing and preventing bullet loss? The answer is yes, of course, Novozymes cold bleaching enzyme solution can completely solve the problem of elasticity loss during rinsing, because cold bleaching enzyme only works on indigo color and plays a bleaching role and has no effect on other fibers. Damage, very suitable for bleaching of easily elastic fabrics.
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