1. About Yarn
PtPTextile Testing Instruments, Testing Equipment Manufacturer Yarn is a long, continuous interlocking fiber suitable for textile production, sewing, crocheting, knitting, weaving, embroidery or rope making. The general term for yarn and thread is
PtPTextile Testing Instruments, Testing Equipment Manufacturer PtPTextile Testing Instruments, Testing Equipment Manufacturer 2. What is twisting?
PtPTextile Testing Instruments, Testing Equipment Manufacturer By rotating around the axis. Twisting increases the strength of the yarn.
Twisting, in yarn and rope production, the process of binding fibers or yarns together to form a continuous strand, achieved during spinning or hanking. The twist direction can be to the right, which is recorded as Z-twist, or to the left, which is recorded as S-twist, inclusive.PtPTextile Testing Instruments, Testing Equipment Manufacturer
3. When discussing yarn twist, the following four parameters are important:
PtPTextile Testing Instruments, Testing Equipment Manufacturer A. Direction of twist
PtPTextile Testing Instruments, Testing Equipment Manufacturer B. Twist/ Twist
PtPTextile Testing Instruments, Testing Equipment Manufacturer C. Twist angle
PtPTextile Testing Instruments, Testing Equipment Manufacturer D. Twist multiplier
PtPTextile Testing Instruments, Testing Equipment Manufacturer PtPTextile Testing Instruments, Testing Equipment Manufacturer 4. Twisting process
PtPTextile Testing Instruments, Testing Equipment Manufacturer A. Single yarn
PtPTextile Testing Instruments, Testing Equipment Manufacturer Single yarn is made of fibers or long The filaments are in oneturned in one direction.
PtPTextile Testing Instruments, Testing Equipment Manufacturer PtPTextile Testing Instruments, Testing Equipment Manufacturer B. Ply Yarn
PtPTextile Testing Instruments, Testing Equipment Manufacturer Ply Yarn is made by twisting together two or more single yarns, usually unidirectional twisted single yarn and twisted yarn together
PtPTextile Testing Instruments, Testing Equipment Manufacturer
reverse orientation. It is er and more durable than single yarn.
PtPTextile Testing Instruments, Testing Equipment Manufacturer PtPTextile Testing Instruments, Testing Equipment Manufacturer Twine, cordage or cordage can be made with hawser twists, with each twist in the opposite direction of the previous twist (S/S/S or Z/S/Z), or using hawser twist, the single yarn and first strand are twisted in one direction and the second strand is twisted in the opposite direction (S/S/Z or Z/Z/S). The number of turns per unit length of a yarn affects the appearance and durability of fabrics made from that yarn. Threads for soft faced fabrics have less twist than threads for smooth faced fabrics. The resulting yarn or crepe fabric has a maximale twist.
PtPTextile Testing Instruments, Testing Equipment Manufacturer PtPTextile Testing Instruments, Testing Equipment Manufacturer 5. Expression of twist
PtPTextile Testing Instruments, Testing Equipment Manufacturer 1) Twist per inch (TPI)
PtPTextile Testing Instruments, Testing Equipment Manufacturer 2) Twist per meter (TPM)
PtPTextile Testing Instruments, Testing Equipment Manufacturer 3) Twist per centimeter (TPC)
PtPTextile Testing Instruments, Testing Equipment Manufacturer PtPTextile Testing Instruments, Testing Equipment Manufacturer Twist Multiplier or Twist Multiplier Twist Multiplier or Twist Multiplier is a measure of twist that takes yarn radius and twist level into account. TM=TPCradic;tex or TM=TPIdivide;radic;Ne
6. Factors Affecting Twist The twist introduced into the yarn during spinning depends on many factors, including:PtPTextile Testing Instruments, Testing Equipment Manufacturer
A. The number of yarns to be spunPtPTextile Testing Instruments, Testing Equipment Manufacturer
B. The quality of the cotton used
PtPTextile Testing Instruments, Testing Equipment Manufacturer C. The purpose of the yarn - will it be used as a warp or weft, knitting yarn or another yarn.
PtPTextile Testing Instruments, Testing Equipment Manufacturer D. The fineness of the fiber being spun
PtPTextile Testing Instruments, Testing Equipment Manufacturer F. The softness of the fabric into which the yarn is to be convertedGrade
PtPTextile Testing Instruments, Testing Equipment Manufacturer PtPTextile Testing Instruments, Testing Equipment Manufacturer 7. Yarn twist In practice, yarn twist is described at the using three main parameters:
PtPTextile Testing Instruments, Testing Equipment Manufacturer (a) twist direction
PtPTextile Testing Instruments, Testing Equipment Manufacturer (b) twist factor or twist multiplicationmore and
PtPTextile Testing Instruments, Testing Equipment Manufacturer (c) twist (number of turns/unit length).
PtPTextile Testing Instruments, Testing Equipment Manufacturer PtPTextile Testing Instruments, Testing Equipment Manufacturer 8. The role of twist in yarn structure:
PtPTextile Testing Instruments, Testing Equipment Manufacturer The yarn must have sufficient tensile strength to withstand the stress of preparation and fabric production. Without twisting, one fiber has very little force.
PtPTextile Testing Instruments, Testing Equipment Manufacturer .
PtPTextile Testing Instruments, Testing Equipment Manufacturer The main purpose of twisting is to bind the fibers together and keep them in place. So it gives cohesion to the yarn. To strengthen twisted strands of discontinuous fibers (such as cotton yarn) and prevent breakage, the individual fibers must grip each other when the strands are put under tension. This cohesion is primarily due to twisting, which compresses fibers when tensile forces are applied, creating friction between adjacent fibers. Convert to fabric. This is mainly achieved by combing yarns with different twist and turn directions into the fabric to improve the mechanical properties (strength, elongation, emodulus of elasticity) and uniformity and to reduce the tendency of deformed yarns to twist and form loops
PtPTextile Testing Instruments, Testing Equipment Manufacturer Improve the abrasion and abrasion resistance of the web, modify structural properties affecting tactile properties (touch) and appearance (crepe effect, opacity, gloss).
PtPTextile Testing Instruments, Testing Equipment Manufacturer PtPTextile Testing Instruments, Testing Equipment Manufacturer 9. Yarn twist test method
PtPTextile Testing Instruments, Testing Equipment Manufacturer A. Manual Yarn Twist Meter GT-A07
Manual Yarn Wire Twist Meter is used to test the twist of roving. Yarn twist gauge is an instrument used to measure yarn twist and its technical indicators. It can measure the twist and twist irregularity of various yarns. It is one of the most important testing tools for evaluating the quality of yarn products. Widely used in central laboratories for textile companies, testing institutions, quality inspection and law enforcement agenciesPtPTextile Testing Instruments, Testing Equipment Manufacturer
PtPTextile Testing Instruments, Testing Equipment Manufacturer B. Electronic Yarn Twist Tester GT-A08
Electronic Yarn Twist Tester Used to determine the yarn twist of single or ply yarn. - spinning method. S and Z twist yarns are adjustable to test lengths up to 50cm/20in. PtPTextile Testing Instruments, Testing Equipment Manufacturer
PtPTextile Testing Instruments, Testing Equipment Manufacturer
