##### General Specifications of Polypropylene co-polymer resin

# General Specifications of Polypropylene co-polymer resin

**Technical Bulletin - CSS-001**

Density, g/cc ASTM-D782A-2 | 0.90 |

Notched Izod Impact (FT-lbs/in.) ASTM-D256-A @ 70 degrees F | 3.0 |

Tensile Strength at Yield (psi units) ASTM-D638 2in/min. | 4000 |

Elongation at yield (%) | 10 |

Deflection Temp. degrees F 66psi | 194 |

Water Absorption - 24 hrs, % ASTM-D570 | 0.02 |

Falling Weight Impact Strength @ -29degree F (ft.lbs.) | 23 |

Coefficient of Linear Thermal Expansion | -30 degrees C to 0 degrees C | 12 |

0 degrees C to 30 degrees C | 14 | |

(MM/MM/C x [10 to the -5th]) | 30 degrees C to 60 degrees C | 21 |

Normal temperature performance range | -17 degrees F to 160 degrees F |

Melting point | 162 degrees C, 324 degrees F |

All information has been supplied by resin manufacturers -- Coroplast provides this data as a service and makes no warranty of information beyond our control.

## General Specifications -- Explanation of Terms

- Density, g/cc, ASTM-D782A: This test determines the material weight in grams per cubic centimeter, which means 1 cubic centimeter of our polypropylene resin would have an average weight of .9 grams.
- Notched Izod Impact, FT-lbs./in., ASTM-D256-A: This test determines the force used to break a sample of our polypropylene using a pendulum type hammer which is dropped from a standardized distance. A notch is milled into the sample to concentrate stress to that point which promotes a brittle fracture. The tests are reported in terms of energy absorbed per unit of sample width.
- Tensile Strength at Yield, lbs./sq.in., ASTM-D638: This test determines force taken to break/ tear a polypropylene sample at a speed rat of 2 inches/minute and percentage of elongation at time of yield or break. It took 4000 lbs./sq.in. of force with 10% elongation at time of yield or break.
- Deflection Temperature, in Degrees, ASTM-D648: This test determines at what temperature a polypropylene sample exhibits deformation with a specified force applied to the sample bridged across a test apparatus. The test uses a 66 psi load and a 264 psi load and determines deflection temperature at which point that the sample deforms .010 inch.
- Water Absorption, % in 24 hrs, ASTM-D570: This test determines the relative rate of absorption of water by plastics when submersed for a 24 hour period. Samples are preconditioned (dried) before the test. The moisture content is very intimately related to such properties as electrical insulation resistance, dielectric losses, mechanical strength, appearance and dimensions.
- Coefficient of Linear Thermal Expansion, (10 to the -5th) in./in./ degrees F, ASTM-D696: This test measures the change in length of a specimen under controlled conditions within a specified range of temperatures. The temp. ranges given were use and a calculation done to determine the coefficient linear thermal expansion by multiplying the coefficient times 10 to the -5th, times the length of the sample (in.), times the difference in temp. change in Celsius. Example: A sample 144" long @ 54 degrees F differential would be calculated as follows: Coefficient = 6.9, thus: (10 to the -5th in./in./degree F) = (6.9 x [10 to the -5th] x 144" x 54 degrees F) = .000069 x 144" x 54 degrees F= .5365"/144"/54 degrees F, thus, a sheet will expand approximately 1/2' in 144' with 54 deg. F range, (32 deg.F to 86 deg.F).

**For additional Technical information contact Coroplast.**