MOLECULAR STRUCTURE:

CELLULOSE

MACROSCOPIC FEATURES:

LENGTH: 10-55mm STAPLE FIBRE
CROSS SECTION: 12 TO 20 microns wide
IN FORMS OF CONVOLUTED RIBBON.
COLOUR: WHITE - CREAM - BROWN
LIGHT REFLECTION: DULL, LOW LUSTRE

PHYSICAL PROPERTIES:

TENACITY: 25-45 Cn/tex @ 65% RH
30-53 Cn/tex @ 100% RH
WET STRENGTH INCREASE OF 110 - 120%
ELONGATION: 3 - 7 % AT BREAK
STRETCH & ELASTICITY: LOW ONLY 70% RECOVERY @ 2% EXTENSION
RESILIENCY: LOW
ABRASION RESISTANCE: FAIR TO GOOD
DIMENSIONAL STABILITY: REASONABLY GOOD ALTHOUGH FABRICS MAY SHRINK DURING LAUNDERING.
MOISTURE REGAIN: 8.5% @ 65% RH
15 - 25% @ 65% RH
THIS IS SLIGHTLY INCREASED BY MERCERIZATION

MELTING POINT: N/A
DENSITY: 1,54 G/CCM

CHEMICAL PROPERTIES:

EFFECTS OF BLEACHES: HIGHLY RESISTANT

ACIDS, ALKALIS AND SOLVENTS: HIGHLY RESISTANT TO ALKALIS STRONG ACIDS & HOT DILUTE ACIDS WILL CAUSE DISINTERGRATION

SUNLIGHT: WITHSTANDS HIGH TEMPERATURES WELL PROLONGED EXPOSURE TO LIGHT WILL CAUSE YELLOWING DUE TO OXIDATION

RESISTANCE TO STAINS: POOR RESISTANCE TO WATER BORN STAINS

DYEABILITY: GOOD AFFINITY TO DYES
DYED WITH DIRECT, VAT & BASIC DYES
VAT DYEING PRODUCES EXCELLENT WASH AND LIGHT FASTNESS

BIOLOGICAL PROPERTIES: HIGHLY SUSCEPTIBLE TOATTACK BU MILDEW, PROMTES ODOUR, DISCOLOURATION, ROTTING AND DEGRATION.

FLAMMABILITY: BURNS RAPIDLY WITH SMOULDERING RED AFTERGLOW

THERMAL CONDUCTIVITY: LOW WHEN DRY

ELECTRICAL CONDUCTIVITY: RELATIVELY HIGH

MOLECULAR STRUCTURE:

PET- POLY ETHYLENE TEREPHALATE

MACROSCOPIC FEATURES:

LENGTH: PRODUCED AS FILAMENT & STAPLE
CROSS SECTION: GENERALLY ROUND BUT CAN BE TRILOBAL, OVAL OR PENTALOBAL
COLOUR: WHITE
LIGHT REFLECTION: BRIGHT OR DULL

PHYSICAL PROPERTIES:

TENACITY: 40 - 45 Cn/tex
70 Cn/tex (h.t)
INITIAL MODULUS: 10N/TEX
ELONGATION: 20 - 30 % AT BREAK
STRETCH & ELASTICITY: 96% RECOVERY AT 2% ELONGATION
51% RECOVERY AT 10% ELONGATION
RESILIENCY: EXCELLENT CREASE RECOVERY
ABRASION RESISTANCE: EXCEPTIONALY GOOD
DIMENSIONAL STABILITY: OUTSTANDING, IF PROPERLY HEAT SET WILL NOT SHRINK OR STRETCH.
MOISTURE REGAIN: 0.4% @ 65% RH
DENSITY: 1.38 G/CCM

CHEMICAL PROPERTIES:

EFFECTS OF BLEACHES: NOT AFFECTED BY OXIDING OR REDUCING BLEACHES

ACIDS, ALKALIS AND SOLVENTS: GOOD RESISTANCE TO ALMOST ALL COMMON ACIDS. HOT CONCENTRATED SULPHURIC ACID WILL CAUSE DETERIORATION. RESISTS MOST ALKALIS.

SUNLIGHT: GOOD RESISTANCE TO UV IF BEHIND GLASS. PROLONGED EXPOSUER CAUSES WEAKENING AND DETERIORATION.

HEAT: HAS GOOD RESISTANCE TO HEAT BEGINS TO STICK AT 230.2 DEGREES CEL MELTS AT 255.8 DEG CEL

RESISTANCE TO STAINS: GOOD RESISTANCE TO WATER BORN STAINS
OIL BORN TSAINS DIFFICULT TO REMOVE

DYEABILITY: WIDE RANGE OF SHADES CAN BE PRODUCED WHICH HAVE GOOD TO EXCELLENT COLOURS FASTNESS TO LIGHT. DISPERSE, AZOIC DYES, AND SOME PIGMENTS USED.

BIOLOGICAL PROPERTIES: RESISTS SLOWLY, WILL SHRINK AWAY FROM FLAME, MELTS AND DRIPS

FLAMMABILITY: BURNS RAPIDLY WITH SMOULDERING RED AFTERGLOW

THERMAL CONDUCTIVITY: LOW

ELECTRICAL CONDUCTIVITY: VERY LOW

MOLECULAR STRUCTURE:

OLEFIN UNITS

MACROSCOPIC FEATURES:

LENGTH: PRODUCED AS FILAMENT, TAPE & STAPLE
CROSS SECTION: GENERALLY ROUND FOR FIBRES OR PENTALOBAL.
COLOUR: WHITE OR PIGMENTED AS REQUIRED
LIGHT REFLECTION: MAY BE DELUSTED USING Ti02 AS REQUIRED

PHYSICAL PROPERTIES:

TENACITY: VERY HIGH 30-70 Cn/tex TENSIBLE PROPERTIES ARE NOT (h.t)

INITIAL MODULUS:
ELONGATION: 15-50% AT BREAK
STRETCH & ELASTICITY: GOOD RECOVERY AT LOW EXTENSIONS 100% RECOVERY AT 2% ELONGATION
RESILIENCY: GOOD
ABRASION RESISTANCE: GOOD
DIMENSIONAL STABILITY: GOOD PROVIDED THAT IT IS NOT EXPOSED TO TEMPERATURES ABOVE 120 DEGREES
MOISTURE REGAIN: 0.01% @ 65% RH
0.015% @ 95% RH
VERY VERY LOW - AS HIGHEST SURFACE TENSION OF ALL FIBRES AND HAS THE BEST TRANSMISSION OF WATER.

MELTING POINT: 170 DEG CEL
DENSITY: 0.90 G/CCM LOWEST OF ALL FIBRES

CHEMICAL PROPERTIES:

ACIDS, ALKALIS AND SOLVENTS: NOT AFFECTED (INERT)

SUNLIGHT: LOSES STRENGTH ON EXPOSURE TO SUNLIGHT FIBRIALTES / CRUMBLES

HEAT: MELTING POINT 170 DEGREES CEL

RESISTANCE TO STAINS: GENERALLY EXCELLENT RESISTANCE TO STAINS AND CHEMICALS

DYEABILITY: DIFFICULT TO DYE

BIOLOGICAL PROPERTIES: RESISTANT TO FUNGI AND MOULDS

FLAMMABILITY: BURNS WITH HEAVY BLACK SMOKE, MELTS

THERMAL CONDUCTIVITY: EXTREMELY LOW

ELECTRICAL CONDUCTIVITY: RELATIVELY LOW