Research On The Flame-retardant Processed By IFR And The Performance Of Finished Cotton Fabric

Cotton is favored by people for its good wearing properties and extensively applied to the fields of garment, ornament and industry. However, cotton is flammable and its LOI is 18. The cotton fabric is finished by intumescent flame retardant (IFR),which uses ammonium phosphate (APP) as acid source, melamine (MEL) as gas source, and pentaerythrite (PER) as carbon source and then flame-retardant cotton fabric of high effect and non-halogen.Cotton fabric is finished by aqueous solution differed in polymerization degree(PDG) and bath temperature. The fabric attained good flame-retardant property under the condition of the PDG at n>1000 and the bath temperature at 80℃. Furthermore, we use APP, APP/MEL, APP/MEL/PER to treat cotton, and the flame-retardant property is: APP/MEL/PER>APP/MEL>APP in sequence. It proves that IFR has effective retardant property .Fixed on the APP mass fraction (10%), we regard MEL, PER mass fraction as A, B factor to establish the orthogonal table. The optimal rate of APP, MEL and PER is determined through orthogonal experiment. The process conditions of baking temperature, baking time and picking up ratio of IFR are chosen based on the single factor test. The results show that the optimal rate of APP/PER/MEL is 10:8:1, when the baking temperature is 150℃, the baking time is 120s, and the picking up ratio is 90%, the flame-retardant effect of the finishing cotton is best.We adopt multi-instrument to examine the properties of both cotton and finished cotton. Using oxygen index tm , Vertical burning tm , DTA-TG to examine their flame retardance; Using CRE and spectrum photometer to examine their mechanics and whiteness; Using FTIR, SEM and XPS to examine the thermal-degradation. The results show that the finished cotton's LOI is 32 and the cotton's is 19, so the later is more flammable than the former; the former is covered with IFR, and its mechanics dropped a little and the whiteness rose. The thermal-degradation temperature fell (210℃). The surface is covered with intumescent char when the temperature is above 400℃. At 800℃, the char rate finished cotton is much higher than cotton's. The cotton begins to degrade above 340℃and its dust and weight decreased a lot after burning.Cotton fabric was treated with IFR mixed with melamine resin, AH-2A , KG-101, and the flame-retardance and durability properties of finished cotton was studied. The properties of the finished fabric treated with KG-101 and IFR are preferable.