Study On Low-Temperature Non-Iron Finishing Of Cotton Fabric With Glyoxal

Most durable press finishing agents were2D resins. Although the2D resin can give good anti-wrinkle performance to cotton fabrics, there is a problem of formaldehyde release to solve, which does not meet the development of ecological and environmental protection. Therefore, we want to find an alternative compound which has non-iron property for cotton fabric with no formaldehyde release. It is a formaldehyde-free durable press finishing agent. At present, the common formaldehyde-free durable press finishing agents are citric acid, BTCA, glyoxal and so on. Citric acid was a durable press finishing agent, which is cheap and easy to get, but there were some problems, such as obvious strength loss and yellowing of the finished fabric. BTCA was a non-formaldehyde durable press (DP) finishing agent that has been paid more attention, and the durable press property of the finished fabric is very good. Whereas, there arestill some problems to overcome, such as high price, phosphorus catalyst for serious environmental pollution and the impact on the colored fabric’s shade and other issues which do not conform to the requirements of the ecological environmental protection. However, glyoxal as a cheap and easily obtained cross-linking agent without formaldehyde, the finishing process is simple, the finished cotton fabric has good wrinkle resistance and small strength loss. It is a durable press finishing agent with the potential application.Glyoxalwas used as the crosslinking agent, to explore the durable press finishing of cotton fabric. At first, glyoxal was applied to finish cotton fabric with different kinds of catalysts. The results show that the magnesium chloride and aluminum sulfate had better catalytic effect to glyoxal crosslinking. Then,magnesium chloride and aluminum sulfatewere used as the catalyst, respectively, toinvestigate the effect of durable press finishing for cotton fabric.Magnesium chloride as the catalyst, and glyoxal as the finishing agent, the suitable recipe was glyoxal100g/L, the ratio of glyoxal to magnesium chloride was5:I;and the suitable finishing process was curing temperature130℃, curing time2min. When strength protection agent was applied, the tear strength retention of the finished fabric increased from five percent to ten percent. In the meantime, the finished fabric had good anti-wrinkle performance. The crease recovery angle of the finished fabric reached250°, and the tear strength retention exceeded sixty percent, when the strength protective agent, either diethylene glycol or PE-208, was20g/L. When the aluminum sulfatewas used as the catalyst, diethylene glycol as the strength protective agent, the amount of glyoxal100g/L, the orthogonal experimental was designed.The results indicate that the suitable finishing process was the mole ratio of glyoxal to aluminum sulfate1:0.006, the mole ratio of diethylene glycol to glyoxal1:0.3, curing temperature130℃, curing time2min. In addition, the effect of the complex catalyst of magnesium chloride and aluminum sulfate on the finished cotton fabric was also investigated. When the constant amount of magnesium chloride was10g/L, the best dosage ratio of magnesium chloride to aluminum sulfate was10:1. When the constant amount of aluminum sulfate was2g/L, the best dosage ratio of aluminum sulfate to magnesium chloride was5:2. Compared to the results of single catalyst either magnesium chloride or aluminum sulfate, the complex catalyst of magnesium chloride and aluminum sulfate had synergistic effect. The finished cotton fabric had goodproperty that the crease winkle angle exceeded240°, the tear strength retention was more than fifty percent as the strength protective agent was applied.Compared with five different commercialized crosslinking agents, the crease winkle angle of the fabric finished by glyoxal as crosslinking agent was higher than that of the fabric finished by other crosslinking agents.The strength damage of the cotton fabric finished by glyoxal became much serious only when the curing condition was very high, such as150℃/3min.