Plastiline™ - Humes

1 Composition
1.1 All Plastiline sheet (keyed and plain) and all
accessories shall be composed of high molar mass polyvinyl
chloride combined with plasticisers, stabilisers and
pigments compounded to make permanently flexible
sheets. Copolymer resins shall not be permitted and
polyvinyl chloride shall constitute not less than 99% by
mass of the resin used.
2 Manufacture
2.1 Manufacture of sheet and accessories
2.1.1 All Plastiline sheet and accessories shall be
produced by extrusion or injection moulding under
controlled temperature and pressure conditions. Keyed
sheets shall be produced by extruding the key integrally
with the sheet and using the same material as the sheet.
2.1.2 During manufacture every sheet produced from a
‘batch’ of compound shall be permanently marked with the
batch identification. The sheet shall be 100% spark tested
for continuity, using spark testing equipment which
generates a minimum of 10,000 volts.
2.2 Fabrication of blankets
2.2.1 Blankets shall be fabricated from individual sheets or
part sheets using automatic hot air welders.
2.2.2 The joints shall be formed by lap welding sheets
parallel to the keys, with a lap not less than 20mm and
a weld width not less than 14mm.
2.2.3 All joints shall be probe tested in accordance with
clause 11.2. The tensile strength of samples taken from the
joint and tested transverse to the joint shall be not less than
20 N/mm.
2.2.4 If a field joint type P2 (see page 11) is required,
it shall be provided by the use of a special sheet (see
page 3) with its wider flap when fabricating the blanket.
2.2.5 Where the required blanket dimensions cannot be
obtained by welding selected material parallel to the key,
the alternatives are to either:
(a) remove keys to form a 50mm wide flat section on
each sheet, lap the sheets and weld as described in 2.2.2
or
(b)
SPECIFICATIONS
butt the sheets and weld strip on the smooth side of
the sheets. This procedure is not recommended except in
factory conditions when adequate support and alignment
of the abutting edges can be ensured.
3 Dimensions
3.1 Sheet dimensions for both standard and special keyed
sheets are given on page 3.
3.2 The mass of the standard sheet (1240mm wide) per
metre run shall be not less than 3.3 kg for keyed sheet.
3.3 Blanket dimensions can be tailored to suit any
installation purpose - the size limitation is in handling.
Requirements should be discussed with your local Humes
representative.
4 Chemical properties
4.1 Using the test method of ASTM D 543 the change in
mass of Plastiline when exposed to the chemicals
listed below shall be determined.
Specimens of identical area and with keys in identical
positions shall be used in all tests. The change in mass shall
not exceed the percentage shown. Sample size shall be
75mm x 25mm by thickness of sheet.
Chemical Agent
Sodium Hypochlorite 0.20
(1% as available chlorine)
Ferric Chloride 1% 0.60
Sodium Chloride 5% 0.15
Sulfuric Acid 20% 0.12
Nitric Acid 1% 0.20
Sodium Hydroxide 5% 0.20
Ammonium Hydroxide 5% 0.40
Soap, Detergent Solution 2% 0.40
5 Physical properties
Maximum % change in mass of
Plastiline over 7 days at 20°C
5.1 The Plastiline shall meet the requirements
stipulated herein and test certificates can be supplied
if requested.
Physical Property Test Method Acceptable Limits
Tensile Strength
(both longitudinal
and transverse to key)
Elongation at Break
(both longitudinal and
transverse to key)
Hardness
Plasticiser Permanence
(24 hours at 90 O C on
50mm diam. disc)
Water Absorption at
24 hours (sample size
76mm x 25mm by
thickness of sheet)
Water Soluble
matter at 24 hours
Tear Strength (both
longitudinal and
transverse to key)
ASTM D 412
ASTM D 412
Shore durometer
D at 23 O C
ASTM D 1203
Method B
ASTM D 570
ASTM D 570
ASTM D 1004
(Grip Speed 8.5
mm/s)
17.25 MPa min.
225% min.
54 min. - 62 max.
1.0% max.
0.10% max.
0.05% max.
80 N/mm
minimum
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