Migration of Crosslinking Reagents in Cotton Fabric During Resin-Finishing Treatments

Many properties of lyocell fibers are markedly different from those of other cellulosic fibers. Hence, it is necessary to study Lyocell wet processing to determine and characterize variables that have a significant influence on the properties of finished products. At the Christian-Doppler Laboratory, we are conducting an investigation to characterize resin finishing of Lyocell. As a part of this investigation, we are studying the influence of drying conditions in the pad-dry-cure process on the performance properties of the finished products. The influence of the drying rate on the distribution of crosslinking reagents in treated lyocell fabric samples is similar to that reported for other cellulosics, but the effect of reagent distribution on the performance properties of treated lyocell is different from that reported for other cellulosics. These differences may stem from changes that occur in lyocell fibers with moisture sorption.

mentioning

confidence: 99%

Drying Rates in Resin Treatment of Lyocell Fabrics

Manian

Bechtold

2005

Migration of Crosslinking Reagents in Cotton/Terene Blended Fabric During Resin Finishing

Pandey

Raje

1985

The migration of a crosslinking reagent during resin finishing of cotton/terene blended fabric is reported using different softeners (a non-ionic polyethylene emulsion and an anionic sulfonated compound) and in the absence of a softener. The cross linking treatment was done with dimethyloldihydroxy-ethyleneurea. Resin finished fabrics were dried for varying periods (0-60 minutes) at 70°C and were analyzed for moisture content and nitrogen content, from which the percent of water evaporation and of agent migration could be calculated. The data analysis showed an increase in the rate of water evaporation in the beginning, followed by a gradual decrease thereafter, both with and without softeners. The percent of agent migration increased gradually during the initial drying period for the fabric treated with a polyethylene emulsion softener or an anionic sulfonated compound softener or without any softener, followed by a gradual decrease thereafter in the first two cases. The samples treated without softeners exhibited higher agent migration than those treated with softeners. The re lationship between the percent of water evaporation and the agent migration is dis cussed.

Properties of Cotton Fabrics Crosslinked with Different Molecular Chain Lengths of Aldehyde Agents

Shyu

Chen

1992

Cotton fabric has been crosslinked with differing molecular chain lengths of an aldehyde crosslinking agent (formaldehyde and glutaraldehyde). The formaldehyde treated fabric shows lower tensile strength retention than the glutaraldehyde treated fabric but higher elongation retention for a given agent concentration. At the same dry or wet crease recovery angle, tensile strength of the formaldehyde treated fabric is lower than that of the glutaraldehyde treated fabric, but elongation is higher. Wet crease recovery of the formaldehyde treated fabric is better than that of the glutaraldehyde treated fabric. The degree of surface migration is similar for both fabrics. Agent distribution in the treated fibers is different for the differing molecular chain lengths of the crosslinking agents.