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PVC
RESIN (SUSPENSION)
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GENERAL
DESCRIPTION OF PVC
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PVC,
a synthetic resin belonging to the family of polymeric organic compounds,
manufactured by bulk, solution, suspension, and emulsion polymerization of
vinyl chloride monomer, with free-radical initiators (peroxide catalyst),
usually in aqueous suspension or emulsion. After mixing with plasticizers,
stabilizers, and pigments, the resin may be fabricated by techniques such as
calendering, molding, or extrusion into flexible articles such as raincoats,
shower curtains, and packaging films. The resin is not plasticized for use in
making rigid products such as water pipe, plumbing fittings, and phonograph
records. For use in making piping or structural panels that require high
resistance to impact, polyvinyl chloride often is blended with small
proportions of rubbery synthetic polymers. Resins more easily plasticized than
polyvinyl chloride can be prepared by adding various proportions of vinyl
acetate to vinyl chloride before polymerizing the mixture; stiffer resins
result from treatment of polyvinyl chloride with chlorine. |
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APPLICATIONS |
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Pure PVC finds application in the construction trades,
where its rigidity and low flammability are useful in pipe, conduit, siding,
window frames, and door frames. In combination with plasticizer (sometimes in
concentrations as high as 50 percent), it is familiar to consumers as floor
tile, garden hose, imitation leather upholstery, and shower curtains.
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SPECIFICATION |
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PROPERTY |
TEST
METHOD
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GRADE |
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SUS
K-66
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SUS
K-78
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POLYMERIZATION DEGREE
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JIS K6721-77 |
1000
± 50 |
1650
± 60 |
| K-VALUE
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DIN 53726 |
66
± 1 |
78
± 1 |
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BULK DENSITY (g/c.cm)
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ASTM D1895-90 |
0.54
± 0.04 |
0.50
± 0.04 |
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SPECIFIC GRAVITY
at 23 C |
ASTM D790 |
ca
1.4
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ca
1.4
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PARTICLE SIZE |
-45
mesh
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0.2%
max |
0.2%
max |
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VOLATILES
at 110 C for 1 H |
ASTM D3030-90 |
0.3%
max |
0.3%
max |
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PROCESSING
CHARACTERISTICS
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PROPERTY |
UNIT
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TEST
METHOD
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GRADE |
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SUS
K-66
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SUS
K-78
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IMPACT
STRENGH
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kg
cm/cm2
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ASTM
D256-93
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>4.0
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>3.9
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TENSILE
STRENGTH
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kg
/cm2
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ASTM
D638-91
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>540
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>560
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ELONGATION
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%
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ASTM
D638-91
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250 |
260
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HEAT
STABILITY
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min
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ASTM
D2115-92
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58
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68
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ELECTRICAL
VOLUME RESISTANCE
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ohmcm |
JIS
K6723-83
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1.13X1013
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1.94X1013
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DOP
ABSORBABILTY
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phr
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ASTM
D3367-90
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21 |
32 |
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FUSION
TIME
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sec
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ASTM
D2538-88
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180
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-
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MIN.
TORQUE
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mg
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ASTM
D2538-88
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2550
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-
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PLASTICIZER
ABSORPTION RATE
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min
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ASTM
D2396-88
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5'
30"
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3'
30"
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COMMENTS |
Packing
: 25kgs in bag, 1mt in bag
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