Development Of Luminous Polymer Optical Fiber Fabrics In Knitted Structure

Polymer optical fiber fabrics are knitted by POFs and yarns. By making mechanicaldamage、laser scoring、bending on the fibre, a portion of the light can guide from its side leakage,through these ways we can produce lumious fabrics. Currently most of light-emitting fabricswere woven, the POF fabrics in knitted structure developed slowly due to the difficulty inknitting circle. This experiment will knitted pofs in the form of loop, and discuss how thetortion、bending、 number of optical fibers and cotton yarns effecting the side-emittingproperties of knitted fabrics. Studies as follows:First, combining knitting circle and the path of latch needles to analyze the relationshipbetween the speed of needles and flat knitting machine head,and through ring-shaped tensile testexperiments to determine the appropriate parameter in knitting. By changing the number ofpofs、fabric structure, knit21kinds of fabrics.Secondly, appling the prime parameters to simulate the bending form of knittedfabrics.Giving each leg half a twist while bending the fiber to simulat coil tortion. To study theimpact of tortion on of the optical fiber, different twists were added to optical fibers.By theabove results, analyse the influence of twisting、bending on optical fibers.Again, accounting of the large light attenuation in knitting coil, a length of pof in each rowhas been lefted to attach the light source. Measuring luminous intensity of the different points ofthe fiber to analyze the effect of the number of fibers and yarns.This study can offer ideas fordesign of luminous knitted fabrics.Finally, based on the database system which is developed by our group,upgrading thedatabases which can be applied in knitted fabrics by adjusting the programming language. Theaccuracy of the software was enhanced from0.05cd m-2to0.015cd m-2. Designing a luminousknitted fabric, using the search function of the tissue bank to select the number of the opticalfibers and structure.at last knitting a light emitting fiber with shading effect.