LABORATORY QUALITY ASSURANCE
Based on the philosophy that quality can not be inspected into a product and that a consistent raw material and a consistent process will yield a consistent liner, laboratory testing of Poly-Flex geomembrane is provided primarily for roll certification.
A retain from each roll is provided for the laboratory. Testing is conducted on the retains as indicated below.
| Property |
Test Method |
Testing Frequency
(min.) |
|
| Thickness (smooth sheet) |
ASTM D 5199 |
per roll |
| (textured sheet) |
ASTM D 5994 |
|
|
| Asperity Height (text. sheet only) |
ASTM D 7466 |
every second roll |
| Alternate the measurement side for double-sided textured sheet. |
|
| Sheet Density |
ASTM D 1505/D 792 |
200,000 lb (90,000 kg) |
|
| Tensile Properties |
ASTM D 6693
|
20,000 lb (9,000 kg) |
1. Yield Strength
2. Break Strength
3. Yield Elongation
4. Break Elongation |
|
| 2% Modulus (LLDPE only) |
ASTM D 5323 |
per each formulation |
|
| Tear Resistance |
ASTM D 1004 |
45,000 lb (20,000 kg) |
|
| Puncture Resistance |
ASTM D 4833 |
45,000 lb (20,000 kg) |
|
Axi-Symetric Break Strain
(LLDPE only) |
ASTM D 5617 |
per each formulation |
|
Stress Crack Resistance
(HDPE only) |
ASTM D 5397 (App.) |
per GRI GM10 |
|
| Carbon Black Content |
ASTM D 1603 |
20,000 lb (9,000 kg) |
|
| Carbon Black Dispersion |
ASTM D 5596 |
45,000 lb (20,000 kg) |
|
| Oxidative Induction Time (OIT) |
| Standard OIT |
ASTM D 3895 |
200,000 LB (90,000
kg) |
|
| Oven Aging at 85°C |
ASTM D 5721 |
|
| High Pressure OIT |
ASTM D 5885 |
per each formulation |
|
| UV Resistance |
ASTM D 7238 |
|
| High Pressure OIT |
ASTM D 5885 |
per each formulation |
|
After the testing has been completed, the data is reviewed by the quality control manager. If any rolls do not meet specifications, additional testing is conducted on that roll. If the roll still does not meet specifications the production manager is notified and the roll is placed on hold.
After the data has been reviewed it is entered into a product file which is used for roll certification.
|
