| | | 1. Stitched? One or multiple layers of unidirectional reinforcement, mat, or cloth, which is stitched together with ¿1 polyester th read, So met! m es oa I led st i tc hbo nded, stitched, or knitted fabric, 2. Unidirectional: A single layer fabric with all the reinforcements in either the warp or weft direction (sec definition for warp and weft). This fabric can either be a knitted or heat set woven fabric. 3. Biaxial: A two-layer fabric with two possible configurations. The first is a double bias with the reinforcement in the +/- 45 direction. The second Is a 0/90 degree fabric with the reinforcement in the warp and weft direction. is a term sometimes used in the market to refer to a biaxial and can be confusing. 4. Triaxial: A three-layer fabric with one layer in the warp or weft direction and the other two layers in the +/- 45 or GO direction. Ft. Quadravial: A four-layer fabric with one layer of the primary directions: warp, wefr, and +/- 45 degree. | | fr. Combination: A refnforcemenl fabric to which mat has been added either by knitting, or by bonding with a heat set polyester resin. Some of the names in the market include Prornat. Biply, Fabmat, Stitchmat, and X-Mat. 7H Double nias: A biaxial fabric where the re i n fo rte ment ] ayers I ie in the +/- 4 5 direction. Vectorply Corporation makes this fabric in a one step process. Other angles are possible with our state of the art manufacturing capability. 8. Warp: This is the lengthwise direction of any fabric and is sometimes referred to as the 0-dcgree axis. 9. Weft: This is the side to side direction of the fabric and is sometimes referred to as the 90-degree axis or fill direction. "ifh Bias: Generally the 45 degree direction of the fabric and is sometimes referred to as the 45 direction, 11. Stitch Yarn: The polyester yarn used to stitch the composite fibers together. It is possible to use other fibers, but polyester | | is the most practical. This thread serves to hold the fabric together until lamination. 12. Gauge; l h e n urn ber of st i tones of yarn per inch in a stitched fabric, as measured in the weft direction. Vectorply Corporation fabrics are normally 5, 7, 10 and 14 gauge, 13. Courses: The number of stitches of yarn per inch in a stitched fabric, as measured in the warp direction. This can vary from 4 to 30 and affects the drape and wel out of the fabric. 14. Tricot stitchtThis is (he type of stitching used in fabrics which zigzags back and forth on the top of line fabric. Note that the opposite side looks like a chain stiloh. 15. Chain: [his is the type of stitching used in knitted fabrics which run? in a straight line down the warp direction of the rabric. 16. Channeled- Rovings are evenly spaced in order for the resin to flow freely to increase permeability during | | |