Effect Of Structural Parameters Of Wovens On The Performance Of Flexible Keyboard Fabrics

With the development of intelligent textiles for wearable pieces of equipment,the flexible keyboard benefits of being soft,foldable and easy to carry have been paid much attention.The fabric-based flexible keyboard is a new type of smart textile,whose main functional layer consists of a conduction layer and an insulation layer.It has a great advantage in portability because it can control the circuit on and off,but also has the unique soft and arbitrary folding characteristics of textiles.The flexible keyboard can be woven into sofas,curtains or clothing and other textiles to control intelligent appliances in the room,which has a very broad development prospect in today’s era of rapid development of electronic technology.Nowadays,research on flexible keyboards is gradually increasing,and more and more attention is being paid to their structure and performance.The original textile-based keyboard usually consists of 3-5 individual fabrics.They are laminated together to form a flexible keyboard,which is cumbersome and inefficient,greatly limiting the popularity and application of fabric keyboards.Compressive resilience and conduction performance are the two most important properties of fabric-based flexible keyboards,which are related to their normal use and service life.In recent years,many scholars have studied the compression performance and conduction performance of fabrics from various aspects,which provide an important theoretical basis for the performance research and improvement of fabric-based flexible keyboards.However,almost none of these studies addressed the compressive resilience and conductive performance of fabric keyboards with design improvements based on Spacer fabric.Firstly,the special three-dimensional fabric named spacer fabric is designed so that the structure corresponds to the parts of the fabric keyboard.The structural parameters of the spacer fabric are changed and suitable yarns are selected to prepare one-piece flexible keyboard fabric specimens.Secondly,the compression resilience performance and contact conduction tests on keyboard fabric specimens with different structural parameters.Compression resilience and support strength are indicators of compression resilience,and the results show that the compression resilience is related to the direction of cavity formation,the form of the support part,and the support width,support height and cavity width.Contact conduction performance is characterized by conduction pressure and conduction rate,and the results showed that the above structural parameters had an effect on the compressive resilience and contact conduction performance of the fabric keyboard,except for the support width which had no effect on the conduction rate.It is found that the overall performance is better when the cavity is formed in the direction of the weft,the support form is "X",the support height is lower than 6mm,and the width of the cavity is lower than 24 weft yarns.Finally,the finite element analysis is used to simulate the state of the fabric keyboard when it is pressed.The effect of structural parameters on the conductive pressure of the fabric keyboard is further explored by observing the spacer yarn changes and analyzing the compressiondisplacement curves obtained by comparing simulation and experiment.The results show that when the fabric is pressed,the spacer yarn near the pressed area bears more pressure and has more deformation.Too large support height will make the spacer yarn tilt,the support effect will be weakened,so that the conduction pressure is reduced.Too large a cavity width will reduce the support of the support part to the pressing area,and the conduction pressure will be reduced.