Research On The Configuration And Capability Of Dyeing Of Richcel Fiber

Richcel fiber is a kind of regenerated cellulose fiber, is the high degree of polymerization, high strength and high wet modulus new viscose fiber s general name. Richcel fiber is a kind of regenerated cellulose fiber with high wet modulus which is been produced by refined virgin wood pulp with high purity. It's raw material mostly come from the refined virgin wood pulp of natural conifer, and it's production technologies adopt the knowhow of Toyobo of Japan. In this paper, the structure of Richcel fiber was first characterized, and then its dyeing properties and dyeing mechanism were studied in detail.In this paper, Richcel fiber's physics structure is been studied, include the cross section and portrait configuration, the chemical compositions, crystalline and orientation, thermal properties and so on; direct dye with good flatness and substantivity is been made use of in order to research the dyeing dynamics and thermodynamics of Richcel fiber; respectively use different kinds of reactive dyes dyeing Richcel fiber, by means of exterminating of dye-uptake, fixation rate, soaping rate and so on. Through comparison of the exterminating between Richcel fiber and viscose fiber, Richcel fiber's dyeing properties were researched. The main results are as follows:1. Richcel fiber's the cross section is a circle or close to circle, it's appearance is smooth, it almost has the same chemical compositions with viscose fiber, it's crystalline and orientation are both higher than viscose fiber and it has good thermal stability.2. Through the study of dyeing dynamics and thermodynamics, it sets out that Richcel fiber's dyeing dynamics is better than viscose fiber and it's adsorption isotherm parameters completely come up to the classic Freundlich's adsorption isotherm parameters which is the classic mode of cellulose fiber, it puts across that Richcel fiber has the similar thermodynamics as viscose fiber.3. Using three kinds of reactive dyes to dye Richcel fiber and viscose fiber, the results show that the dye-update of Richcel fiber is a little bit more than viscose fiber after dyeing with X-style of reactive dyes; the dye-update of Richcel fiber is obviously higher than viscose fiber by dyeing with M-style of reactive dyes; besides, it's the most non-optimal result by dyeing with K-style of reactive dyes. So, the M-style of reactive dyes are suitable for dyeing Richcel fiber.4. It has greatly influence for Richcel fiber by dyeing with reactive dyes, such as dyeing time, temperature, the dosages of salt and sodium borate. So it should be carefully controlled in the practical operation.