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Toughness and Flexibility: Technical Information
Inherently tough PRIMACOR* copolymers have rugged physical properties. Ultimate tensile strength is comparable to that of LLDPE, while dart impact strength is substantially greater. Yet films made with PRIMACOR copolymers still offer outstanding optical clarity.
In tests of 20-mil films blown from comparable melt index polymers, PRIMACOR copolymers showed clearly superior Elmendorf tear strength over EVA . . . and up to ten times the tear strength of the ionomer. In cast films, PRIMACOR copolymers can even offer more balanced tear strength than comparable linear low material.
| Properties |
ASTM
Method |
DOWLEX 2045
(1.0 MI, 0.920 Density) |
EVA
(2.0 MI,
19% VA) |
Ionomer
(1.3 MI,
Na+Ion) |
PRIMACOR 1410
(1.5 MI, 9% AA) |
 |
Ultimate Tensile, psi
MD
CD |
D-882 |
5635
4780 |
4070
3520 |
5980
5105 |
5800
6000 |
Tensile Yield, psi
MD
CD |
D-882 |
1595
1585 |
720
620 |
2090
1805 |
1250
1150 |
Elongation, %
MD
CD |
D-882 |
725
765 |
610
670 |
365
415 |
550
560 |
2% Secant Modulus, psi
MD
CD |
D-882 |
28.3
31.8 |
6.9
7.4 |
22.7
23.3 |
12.6
12.6 |
| Dart Impact, Method A |
D1709 |
260 |
>800 |
>800 |
>800 |
Elmendorf Tear
MD
CD |
D-1922 |
700
1250 |
120
205 |
32
32 |
350
375 |
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Note: 2.0 mil film, 400° F extrusion temperature.
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