Celsol-biotransformation of cellulose

The enzyme-aided production of cellulosic fibres has been fascinating the Finnish and Polish research groups since late 1980's. It has been proved the chemical substitution of cellulose is not a necesity prior to the production of alkaline spinning solution. Treatment of dissolving pulp with cellulase mixture renders the pulp directly alk..

Isolation of bifunctional reactive dye hydrolysis compounds

The bifunctional reactive dye Sumifix Supra Blue BRF from Sumitomo has two different reactive groups: monochlorotriazine and sulphatoethylsulphone. Several hydrolysis products are produced during dyeing and have been isolated by being first removed from the salt by dialysis and thin-layer chromatography. The final purification is also don..

An investigation into the reaction of bifunctional reactive dye at various pH levels

The bifunctional reactive dye Sumifix Supra Blue BRF, which has two different reactive groups (sulphatoethylsulphone and monochlorotriazine), was stored for 1 h at various pH before dyeing. Corresponding experiments were carried out with individual sulphatoethylsulphone and monochlorotriazine reactive dyes. The pH values of the solutions ..

Studies in dyeing behaviour of microfilament yarns and fabrics

PET microfibres, with high gloss and greater total surface area, differ in dyeing properties from regular PET fibres. When used in conjunction with the regular PET, differences in property get magnified resulting in uneven appearance of shade and poor fastness properties. In this paper, therefore, an attempt has been made to understand th..

The jigger - a highly topical dyeing machine enjoying a renaissance

A review of developments in jig dyeing is presented. The increased preference for short runs and use of many more colours in general means the jigger is often more suitable than continuous dyeing. Jig dyeing is also economical and environmentally advantageous due to the low liquor ratio required.

An investigation of the trichloroacetic acid-methylene chloride treatment on the morphology of polyester yarns

Previous research has shown that the interaction of trichloroacetic acid-methylene chloride (TCAMC) solvent system with polyethylene terephthalate dissolves the PET. With this in mind it is expected that at certain lower concentrations of TCAMC treatment, the compact structure of PET will open up and as a result of molecular rearrangement..

Process optimisation and quality assurance in wet finishing

In textile finishing residual chemicals from the preceding stages can cause damage during later stages. A description is given of a discontinuous measuring technique for determining residual chemicals in the fabric for all finishing sectors without damaging the goods is described. A rapid extraction method involves the use of Morapex equi..

정련견의 간접 디아조화

견분자 중에는 여러가지 관능기가 존재하여 반응성 물질의 반응좌석으로의 역할이 가능하다. 견을 포름알데히드와 헥사메틸렌 테트라민으로 처리하여 화학개질한 보고가 있다. 이 보고에서는 맨 먼저 견 피브로인에 P-아미노 벤즈 알데히드를 반응시키고, 이어서 디아조화해서 커플링 성분과 반응시켜 견피브로인에 공유결합 형태의 아조염료를 합성한 시험에 대해서..

구핵성 아미노 알킬 염료와 가교제에 의한 양모의 균염 견뢰 염색 (제2보) 2관능성 가교제의 사용

제1보 [J. Soc. Dyers Colour., 111, 12 (1995)]에서는 양모를 아미노 알킬 염료와 3관능성 가교제 (triacroylaminohexahydro-s-triazine : FAP)로 염색하면 균염 견뢰 염색이 가능하다는 것을 보고하였다. 본 논문은 FAP 대신 2관능성 가교제인 N N'-methylene-bisacrlamide(MBA) 및 그의 양 말단을 카치온화한 유도체 (-NHCOCH₂CH₂N+R₃)인 DP3-5663을 사용해서 ..

이온 추출법에 의한 염색공장폐수의 탈색

염색에 사용되는 염료가 전부 섬유재료로 이행되지는 않는다. 그 결과, 염색폐수중에는 항상 많든 적든간에 염료가 남아있다. 많은 경우에 이것이 하천을 착색하고, 곧 수질오염이라고 인식되어진다. 염료는 인간이나 환경에 반드시 유해하다고는 할 수 없지만, 이런 종류의 물의 착색은 이미 공식적으로 받아들여지지 않고, 그것에 대한 규제가 심해지고 있다. 법규..