Test and analysis of flame retardant properties of flame retardant fabrics

Test and analysis of Flame retardant properties of Flame retardant fabrics
The counting method is a classical voting method, that is, the sort voting system. The method is to vote not only the voters who are most likely to be elected, but also to allow voters to sort out those qualified candidates. Then the candidates score and accumulate from high to low, and the highest score wins the [11]. Next, the fabric's surface density, shrinkage and abrasion resistance are taken as elements. The votes are sorted and voted. According to the fabric's basic performance, the Borda number is calculated, as shown in 6. The 6Borda score of 321 calculated surface density of the air layer, half cardigan cardigan shrinkage air layer half cardigan cardigan wear air layer half cardigan, cardigan bursting strength of air layer half cardigan cardigan from 6 that the number Borda of the organizational structure is as follows: B (=3+3+2+3=11B (semi air layer) cardigan) =3+2+1+2=8B (cardigan) =2+1+1+1=5 because the Borda number is larger, corresponding to this set of data the best program is [12], so the optimal structure of the fabric for milano. 3 the test and analysis of the flame retardancy of the fabric can be seen from the test of the basic properties of the fabric and the selection of the Borda counting method, and the best fabric structure is the rib air layer. The single factor method is used to control the fabric structure for rib air layer organization. Referring to GB/T5455 1997 - "textile combustion performance experiment" level method, 5 proportions of fabrics are tested.
During the test, the specimens were placed on the sample clips and placed horizontally in the test box. The distance between the flame spread on the specimen and the time to spread the distance were measured. The burning rate of the 5 fabrics was calculated, and the results were shown in 7. 7, the burning rate of different proportions of fabric can be seen from 7. The burning rate of pure flame retardant polyester yarn is the smallest, and the burning rates of 3 different tissues of M (resistance): m (polyester) =2: 1 are all less than 100mm/min. The provisions of GB8410 automobile interior fabric burning rate is less than 100mm/min, so the pure flame retardant polyester yarn and 3 kinds of M (resistance): m (polyester) =2: the burning rate of the fabric 1 has reached the requirements of flame retardant in China automotive interior fabric, while the rest of the organization under the ratio can not reach the required flame retardant effect. 3.1 The comparison of flame retardant effects under the same ratio and structure 3 is the material of M (resistance): m (polyester) =2: 1 border arrangement and the combustion of air layer. From 7, under the same ratio, compared with two different fabrics, the burning rate of air layer tissue is smaller than that of border organization, and the continuous combustion time of air layer is shorter.
It can be seen from the knitting of 3 organizations: the rib air layer is made up of rib and needle tissue, while the half border weaving and border weaving is the loop structure, so the surface density of the rib air layer is obviously larger than that of the half border weaving and border weaving organization. In the flame-retardant test, because the density of the coil in the unit area of the rib air layer is large, relatively thick and the pores are few, the low oxygen content in the fabric combustion leads to low burning rate. It can be seen that the higher the fabric, the burning rate will decrease, and the burning rate of the border and half border weaving is higher than that of the rib air layer. Comparison of flame retardant effect cardigan air layer organization 3 different organizations after the burning of the same physical structure, 3.2 different ratios of 4 different proportions, the organizational structure of the air layer fabric after burning effect, damage length of the visible Flame retardant fabric is significantly less than the ordinary polyester fabric. It can be seen from 7 that the flame retardant effect will be better with the increase of the composition of the flame retardant polyester yarn. The flame retardant effect of pure flame retardant polyester yarn is the best. The flame retardant effect of the fabric with m (resistance): m (polyester) =2: 1 can also meet the national standard, and the rest of the fabrics can not be qualified automotive flame retardant cushion.
Fabric half cardigan cardigan air layer air air layer air air layer m (resistance): m (polyester) 2: 12: 11: 02: 11: 11: 20: 1 afterflame time /s4.65.02.13.27.69.211.0 /s0000000 /mm7.47.32.84.514.722.733.3 average smoldering time damage length average combustion rate (mm / min-1) 96.587.680.084.4116.0148.0180.042 however. Flame retardant polyester yarn prices higher than ordinary polyester yarn. With the increase in the composition of the flame retardant polyester yarn, the flame retardant effect is better, but the cost will increase. To account for the increased cost of car, so to determine the ratio of yarn is the most suitable for M (resistance): m (polyester) =2: 1. M (resistance): m (polyester) effect of 4 different proportions of =2: 1 ordinary polyester fabric fabric after the burning of the 4 conclusion (1) the basic performance of knitted fabrics of 3 kinds of organization structure and 5 kinds of mixing proportion test requirements, surface density, shrinkage performance and abrasion resistance and bursting strength reached the car seat fabric of knitted fabrics. (2) using the single factor method and the Borda analysis method, the optimum flame retardant effect of the yarn ratio is m (resistance): m (polyester) =2: 1, and the structure of the structure is the rib air layer. (3) the causes and mechanisms of the difference in flame retardancy effect in two different proportions, different structures and the same structure and different proportions were analyzed, so as to provide a theoretical basis for the industrial production of XIIpQa.