Study On Mechanical And Heat And Moisture Transfer Properties Of Bonded Clothing Fabrics

The paper mainly studies the relationship of the mechanical properties and the heat and moisture transfer performance between fabrics bonded before and after. It includes two parts, theoretical deduction and experimental verification. In the first part, theoretical formula is deducted and established in which the indexes of the mechanical properties and the heat and moisture transfer performance are applied after the fabrics being bonded. In the last part, three kinds of ordinary single-sided adhesive interlining and two kinds of double-sided adhesive lining are combined with 22 kinds of autumn and winter period take fabrics. At the same time, their mechanical and heat and moisture transfer performance are tested while fabrics bonded after and before. By analyzing the data of the test results, it could be explicitly observed whether the actual test results coordinate with the deduction ones, so as to complete the verification of theoretical derivation.In this study, the author constructs the formula for calculating the tensile modulus that reflects the bending rigidity, shear stiffness, thermal resistance and moisture resistance of composite fabrics.The formula is a function of image of the corresponding properties of the fabrics consisted of the bonded composites and the fabrics without bonding. Through the module analyses, the range of tensile modulus, bending rigidity, moisture permeability indexes and other indicators after the fabrics bonded comes out, exploiting the mathematical methods such as derivation, limit operation and MATLAB programming method. Meanwhile, the interface to show bending effect and calculation process of bonded composites and the fabrics without bonding is designed by use of the VB language program.In the experimental results, the tensile modulus of the actual test value of the correlation coefficient is 0.88, and non-linear regression model and derived formula are very close. The results of the analysis of the bending stiffness reveal that the correlation coefficient of the actual value of bending stiffness of every group bonded composite fabrics lining one side and the theoretical value of the two-layer material in curved model is about 0.97- 1.2, which theirmodels,R2 value are all about 0.9,thoughthe linearity between the actual value of bending stiffness of the double-sided adhesive bonded fabrics and the theoretical value of the three-layer material in curved model demonstrates a certain degree of reduction(correlation coefficient value ranges from 0.7-0.95, R2 values are all about 0.8). Further, by putting to use formula in the bending theory of three-tier curved model, the outcomes after derivation of calculating and analyzing show that linear correlation increase between the theoretical value and the actual value of the bending stiffness(correlation coefficient value ranges from 0.9-1.1, R2 value is above 0.9). This illustrates that the bending procession of double-sided adhesive bonded fabrics could be explained in the context of the bending theory of three-tier curved model. Data analysis results of shear stiffness also meet the basic deduction conclusion that the shear stiffness of the multilayer fabric adhesive is the sums of shear stiffness of the individual fabric non-adhesive altogether. A new variable P is introduced in the suspension property analysis to appreciate the rate of change of several suspension indicators when the fabrics are bonded before and after. Analysis of experimental data of thermal resistance and moisture resistance are also basically in line with the results of "addition" rule in deduction, but it is simultaneously exhibiting the characteristics that the actual value is always less than the theoretical value, which the author points out that the reason of disparity is due to the thinning thickness of the adhesive composite fabrics(compared with the theoretical value) and diminishing gap between the composite fabric and test plate.In this study, the author sets up the formula and then confirms the relationship of the mechanical properties and the heat and moisture transfer performance between fabrics bonded before and after. The results of the study is helpful for enterprises and individuals to better understand and predict the variation of the surface style and comfort of the heat and moisture of bonded fabrics, and provide a reference for the future to carry out three-dimensional simulation of virtual clothing with sticky lining process.