Anti-Wrinkle Finishing And Strength Protection Of Linen Fabric With BTCA

This paper studied the process condition of anti-wrinkle finishing for linen fabric with BTCA as formaldehyde-free crease-resistant agent.Polyethylene glycol(PEG) and triethylamine(TEA) were used to find the balance between the anti-wrinkle and mechanical properties.A good balance between the anti-wrinkle properties and strength retention can be achieved by the means of optimizing the process condition.The effect of process condition without PEG and TEA was first explored via single factor and orthogonal experiments.The optimum condition was determined as:BTCA:40g/L,SHP:60g/L, SIE:2g/L,JFC:2g/L;pre-drying at 80℃for 2min,curing at 150℃for 3min.The effect of BTCA concentration and curing temperature on warp break strength and wrinkle recovery angle of linen were studied by establishing regression equations.The results showed that the curing temperature would have a stronger influence on fabric strength retention. When the temperature is below 140℃,crosslinking reaction rarely occurred with BTCA.The strength loss attribute to crosslinking mainly appeared between 140℃and 170℃.The R value indicated that the temperature of 140℃and 150℃would be beneficial to decrease the fabric strength loss.The study showed that adding effective additives to reduce curing temperature would be a method of decreasing strength loss of linen fabric.Based on the basic condition,the effect of additional of PEG and TEA on the properties of linen was studied.The additional of PEG would help linen fabric swelling,resulting in an even crosslink and less strain centrality.TEA was also added to adjust pH value of process to improve the mechanical properties of linen fabric.The result showed that when the concentrations of TEA and PEG400 were all 20g/L,there would be an increase of strength reservation meanwhile good anti-wrinkle effect could also be achieved.The optimum condition of the anti-wrinkle finishing process was determined as:BTCA:40g/L,SHP:60g/L,SIE:2g/L,JFC:2g/L,PEG400:20g/L, TEA:20g/L,;pre-drying at 80℃for 2min,curing at 150℃for 3min. As a comparison,the performance of untreated linen fabric,those treated with BTCA, BTCA/PEG400 and BTCA/PEG400/TEA were studied,including main crease-resistant and mechanic properties.The results showed that the wet and dry wrinkle recovery angle of all linen fabric treated with BTCA were increased,but there were also strength loss to different extent for treated fabrics.Fabric treated only with BTCA had a severe strength loss,while adding PEG400 and TEA could achieve a good balance between the anti-wrinkle properties and strength retention. Additives had few influence on the other physical properties of fabrics,such as stiffness and whiteness.The surfaces of linen fabrics were determined by a scanning electrical microscope(SEM). The results demonstrated that the fabric treated with BTCA/PEG/TEA had a smooth surface and fewer fissures.The FT-IR analysis of four types of fabric samples showed that ester bonds were formed between polycaboxylic acid and the hydroxyl of fiber molecules,and there was a certain degree of relationship between the wrinkle recovery angle and absorption peak of ester carbonyl.