Laboratory Quality Assurance

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)	GRI GM12	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	GRI GM11
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.