Evaluating the Outdoor Durability Offered by Cortec VpCI-126 Blue Film After Exposure to Outdoor Environment

Background: Cortec VpCI-126 Blue film (6 mil, SO# 13591, MB# 06821, rec# 1003) provided stronger mechanical protection as compared to non-corrosion inhibitor treated low density polyethylene film (6 mil) according to test method ASTM G 53 (accelerated outdoor durability and humidity test in Q-U-V accelerated weathering test chamber, Project # 01-251-1125). Outdoor durability testing is sought for Cortec VpCI-126 Blue film (6 mil, SO# 13591, MB# 06821, rec# 1003) and plain low density polyethylene film (6 mil).

Purpose: Expose Cortec VpCI-126 Blue film (6 mil, SO# 13591, MB# 06821, rec# 1003) and plain low density polyethylene film (6 mil) to outdoor environment and observe until ripping of film is evident.

Method: Modified ASTM D 1748-83 (outdoor exposure)

Materials: Q-Panel SAE 1010 Carbon Steel panels

Cortec VpCI-126 Blue film (6 mil, SO# 13591, MB# 06821, rec# 1003)

Cortec VpCI-126 Blue film (4 mil)

Plain low density polyethylene film (6 mil).

Procedure: Three carbon steel panels were wrapped with the following films;

Cortec VpCI-126 Blue film (6 mil, SO# 13591, MB# 06821,rec# 1003),

Cortec VpCI-126 Blue film (4 mil)

Plain low density polyethylene film (6 mil).

The three panels were placed on outdoor rack and observed until ripping occurred.

Results:

Modified ASTM D 1748-83 (outdoor exposure)

Material

Time until ripping of film (months)

Carbon steel panel wrapped in Cortec VpCI-126 Blue film

(6 mil, SO# 13591, MB# 06821, rec# 1003)

>> 12

Carbon steel panel wrapped in Cortec VpCI-126 Blue film

(4 mil)

>> 12

Carbon steel panel wrapped in non-corrosion inhibitor treated

low density polyethylene film (6 mil).

10

Photos attached.

Conclusion: Addition of Cortec’s masterbatch to the plain polyethylene film increases the UV stability and as a result mechanical properties of the film when exposed to outdoor environment.

The test was discontinued after 12 months, without evidence of premature failure in case of VpCI-126. Control sample (plain LDPE) failed after 10 months.

Project #: 01-339-1125

Estimated Cost of Project: 3 hours

To: Cortec Corporation

From: Bob Berg

Date: 08/22/02

cc: Boris Miksic

Anna Vignetti

Art Ahlbrecht

Margarita Kharshan

Cliff Cracauer

Vanessa Schultz

Bob Boyle