TEXTILES - CHAPTERS 4,5 (copy)
Terms
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-
T OR F
CROSS SECTIONS SHOW SOIL MORE READILY THAN DULL FIBERS HAVING ROUND CROSS SECTIONS - TRUE
- COVERING POWER
- THE ABILITY OF A TEXTILE STRUCTURE TO COVER OR CONCEAL AN AREA WITHOUT UNDUE WEIGHT. THE EFFECTIVENESS WITH WHICH FIBERS COVER A SURFACE DEPENDS ON STRUCTURAL FEATURES - ACROSS-SECTIONAL SHAPE AND LONGITUDINAL CONFIGURATION - AND SPECIFIC GRAVITY. FIBERS WITH A NATURAL OR ENGINEERED CRIMP OR COILED CONFIGURATION COVER MORE SURFACE AREA THAN DO STRAIGHT FIBERS.
- OTHER THINGS BEING EQUAL, WHICH FIBER WOULD PROVIDE A FABRIC WITH THE GREATEST COVERING POWER - POLYESTER, NYLON OR OLEFIN?
- OLEFIN
- COVERING POWER MAY BE EXPLAINED AS THE ABILITY OF A TEXTILE STRUCTURE TO COVER OR CONCEAL MAXIMUM SURFACE AREA WITH ________ WEIGHT
- MINIMUM
- ASSUMING EQUAL DIAMETERS: THE FIBER WITH A ____ SPECIFIC GRAVITY WOULD PROVIDE PROVIDE HIGHER COVERING POWER THAN WOULD THE FIBER WITH A ___ SPECIFIC GRAVITY
-
LOW
HIGH - ELECTRICAL CONDUCTIVITY AND RESISTIVITY
- TERMS OF OPPOSITE MEANING THAT DESCRIBE THE RELATIVE EASE WITH WHICH A FIBER CONDUCTS OR RESISTS THE FLOW OF ELECTRONS. THE CONTINUAL MOVEMENT AND RAPID DISSIPATION OF ELECTRONS OVER LARGE AREAS ARE CRITICAL INFLUENCES ON STATIC DEVELOPMENT.
- CONDUCTORS
- FIBERS THAT KEEP ELECTRONS FLOWING, MMINIMIZING THEIR ACCUMULATION, ARE CLASSIFIED AS CONDUCTORS, IN CONTRAST TO INSULATORS.
- EXAMPLES OF FIBERS WHICH ARE CONDUCTORS
- OLEFINS, ACRYLICS, AND MODACRYLICS ARE CONDUCTORS AS ARE METAL FIBERS.
-
T OR F
FIBERS KNOWN TO BE POOR ELECTRICAL CONDUCTORS (E.G. GOOD ELECTRICAL INSULATORS SUCH AS WOOL, NYLON AND POLYESTER) TEND TO BUILD UP ELECTRONS ON THE SURFACE - TRUE
- THE LEVEL OF RELATIVE HUMIDITY HAS
- AN IMPORTANT EFFECT ON STATIC DEVELOPMENT
- THE BASIC PROBLEM OF STATIC DEVELOPMENT IS
- THE AVAILABILITY OF ELECTRONS ON THE FIBER'S SURFACE; THE BASIC ATTEMPT TO CONTROL STATIC, THEREFORE, IS TO PREVENT THIS BUILDUP SO ELECTRONS WILL NOT BE AVAILABLE FOR TRANSFER
- THE TRIBOELECTRIC SERIES IS USED TO INDICATE THE RELATIVE AMOUNT OF HEAT ENERGY REQUIRED FOR RELEASING ELECTRONS FROM THE SURFACE OF FIBERS:
- FIBERS REQUIRING HIGHER LEVELS OF HEAT GENERATE LOWER LEVELS OF VOLTAGE ON THE BODY
- IF A PERSON WALKS WITH A SCUFFING MOVEMENT
- THE ACTION RUBS MORE ELECTRONS ON THE CARPET SURFACE
- INDIRECT YARN NUMBER SYSTEMS, SUCH AS THE COTTON COUNT, WORSTED COUNT, AND THE LINEN LEA SYSTEMS, YARN NUMBERS ARE BASED ON
- LENGTH PER UNIT OF WEIGHT
-
WHICH OF THE FOLLOWING IS THE LARGEST YARN?
A) 30cc
B) 40cc
C) 15cc
D) 10cc - D) - 10cc
- IF ONE POUND OF CLEAN COTTON FIBER WAS USED TO PRODUCE 8400 YARDS OF YARN, HOW MANY YANKS WERE PRODUCED?
- 10
- BOUCLE
- COMPLEX YARN WITH PRONOUNCED, CLOSED LOOPS THAT VARY IN SIZE AND SPACING
- CABLE YARNS
- SIMPLE YARN FORMED BY PLYING TWO OR MORE CORDS
- CARDING
- COMBING FIBERS TO ALIGN THEM IN THE YARN PRODUCTION PROCESS
- CHENILLE YARNS
- YARN-LIKE STRAND CUT FROM LENO-WOVEN FABRIC THAT HAS FINE WARP YARNS AND COARSE FILLING YARNS; FLUFFY STRAND IS SAID TO RESEMBLE A CATERPILLAR
- COMPLEX YARNS
- DECORATIVE YARNS HAVING A BASE YARN, A FANCY YARN, AND/OR A BINDER OR TIE YARN.
- FLAME YARN
- COMPLEX YARN PRODUCED BY TWISTING A SIMPLE YARN AROUND A SINGLE SLUB YARN THAT HAS LARGE AND ELONGATED AREAS OF LOW TWIST.
- GIMP YARNS
- YARN FORMED BY SPIRALLY WRAPPING ONE YARN AROUND ANOTHER, OR BY BRAIDING THREE OR MORE STRANDS AROUND ONE CENTRAL YARN.
- HAWSER
- SIMPLE YARN FORMED BY TWISTING TWO OR MORE ROPES TOGETHER
- NUB YARNS
- COMPLEX YARN WITH TIGHTLY COMPACTED PROJECTS CREATED AT IRREGULAR INTERVALS ALONG ITS LENGTH.
- RATINE YARNS
- COMPLEX YARN WITH SMALL, UNIFORMLY SPACED LOOPS OF EQUAL SIZE.
- SLUB YARNS
- COMPLEX SINGLE YARN WITH FINE AND COARSE SEGMENTS ALONG ITS LENGTH, WHICH ARE PRODUCED BY VARYING THE LEVEL OF TWIST USED IN SPINNING
- SPIRAL YARNS
- COMPLEX YARN FORMED BY TWISTING A HEAVY YARN AROUND A FINE YARN
- SPLASH YARNS
- COMPLEX YARN HAVING ELONGATED NUBS ALONG ITS LENGTH
- TEXTURING
- INTRODUCING MULTIDIMENSIONAL CONFIGURATIONS TO OTHERWISE PARALLEL AND SMOOTH FILAMENTS
- TOW
- A ROPE-LIKE BUNDLE OF MANUFACTURED FILAMENTS HAVING CRIMP BUT NO TWIST