MANU 3317-Notes 3

• 1. Incoming QC: garbage in - garbage out
• 2. In-process testing: monitor process for adjustments
• 3. Finished goods testing: attempts to catchsubstandard products
• 4. Material performance: match raw material choices toperformance requirements
• 5. Comparison to competitive products
• 6. Analysis of competitive product
• 7. Research and development: analysis ofdevelopmental products

American Society for Testing and Materials - organization that develops and publishes technical standards

• - testing standards no performance standards
• -purpose: to ensure the duplication of testing conditinos are to the highest degree possible

Current status – 82 books, approx $10,000

• 
• ex. PE

Creep: change in geometry of a part overtime through the working temp range of the polymer

Cold Flow: generally refers to creep at room temperature

a measure of the light reflected by the surface of a material.

T: % of light getting through

H: defined as the fraction of transmitted light that deviates from the directly transmitted beam by more than 2.5degrees

C: resolution of detail

UV Protection - different plastics vary considerably in their resistance to UV degradation. We often need to add UVI such as HALS to slow the degradation process.

• -tendency of a plastic to absorb moisture
• -plastics must be dried before processing: Hot air dryer, Desiccant dryer

-burning the plastic and identify using odor, smell of fume, color of flame, nature of smoke

provides info about the resin such as resin properties, film properties, test method and values

• -Plastic films allow passage of oxygen,water vapor and other gasses
• -Important property for food protection

Engineered films which allow passage inand/or passage out of target gasses(oxygen, carbon dioxide)

refer to lab, weight, water