ALCOTEX | Properties
General Properties of Alcotex
Test Procedure Test Method Performance
Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus ASTM C 518 Resistance = 0.071 m² ˙ K /Watt Conductivity=14.085 Watt/m²˙K
Deflection of Temperature of Plastics under Flexural Load ASTM D 648 Average Heat Deflection Temperature Under Load at 0.010” deflection is 203.5°C
Coefficient of Linear Thermal Expansion of Plastics Between -30°C and 30°C ASTM D 696 Average Thermal Expansion/Contraction is 2.51 x 10-5 mm/mm°C
Tension Testing of Metallic Materials – Yield Strength ASTM E8 Average 43.1 N/mm²
Tension Testing of Metallic Materials – Tensile Strength ASTM E8 Average 55.1 N/mm²
Tension Testing of Metallic Materials – Elongation ASTM E8 Average 13.54%
Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions ASTM E 90 Passed
Classification for Rating Sound Insulation ASTM E 413 Passed
Shear Properties of Sandwich Core Materials ASTM C 273 Average Shear Stress – 7.2 N/mm² Average Shear Modulus – 0.8 N/mm²
Flatwise Tensile Strength of Sandwich Construction ASTM C 297 Average Tensile Strength – 7.4 N/mm²
Climbing Drum Peel for Adhesives ASTM D 1781 Average Peak Climbing Drum Peel Strength – 237.7 N˙mm/mm width
Flexural Properties of Sandwich Constructions ASTM C 393 Average Shear Stress – 1.57 N/mm²

* ASTM: American Society for Testing and Materials
Sound Transmission Loss
With a triple sandwiched composite structure, ALCOTEX has an excellent physical impact absorbability and larger sound transmission loss when compared to other materials of the same weight (plywood, steel, aluminum, etc.). Therefore, ALCOTEX is great for effective vibration and sound damping control. The sound transmission classes are shown below.
Deflection by Wind Load
Because ALCOTEX, composed of thermoplastic core of low-density polyethylene sandwiched between two skins of aluminum sheet, is lightweight and rigid, ALCOTEX is superior in yield strength. Deflection by wind load is shown below.
Paint Finish
Solid and mica colors are coated in a two coating two-bake system. The total dry film thickness is around 25+3 ㎛ . The external cladding panel surface is factory pre-finished by the coil coater with PVdF coating containing not less than 70% of Kynar 500 or Hylar 5000 resin applied through a reverse roller coating process. The finished surface is factory protected with a self-adhesive peel off film. It is highly recommended to peel off the film within 6 months from manufacturing.
  
ALL METHODS OF TESTING MEET THE AAMA 2605 DESIGNATION
Test Item Test Method Performance
Color Uniformity AAMA 2605 Samples must meet minimum dry-film thickness requirements.
Specular Gloss (60 º) ASTM D 523 Using a 60 degree gloss meter, the samples must meet minimum dry film thickness requirements. Gloss values shall be within ± 5 units of the manufacturer’s specification.
Dry Film Hardness ASTM D 3363 HB minimum using Eagle Turquoise Pencil.  No rupture of film.
Flexibility : T-Bend ASTM D 4145 1-T
Adhesion – Dry, Wet, and Boiling Water ASTM D 3359 Coating shall not pick off when subjected to a grid of 11 cuts x 11 cuts that are 1mm apart and taped with #600 Scotch Tape.
Impact Resistance ASTM D 2794 Using a Gardner Variable Impact Tester with 5/8” mandrel, the coating must withstand reverse impact of 1.5 in-lb per mil substrate thickness.  Coating shall adhere tightly to metal when subjected to #600 Scotch Tape pick-off test.
Abrasion Resistance ASTM D 968 Using the falling sand method, the Abrasion Coefficient Value shall be a minimum of 40.
Mortar Resistance ASTM C 207 Mortar prepared with 75 grams of building lime, 225 grams of dry sand, and approx. 100 grams of water shall dislodge easily from the painted surface. There shall be no loss of film adhesion or visual change.
Chalk Resistance ASTM D 659 Chalking is measured on an exposed, unwashed painted surface and be no more than that represented by a No. 8 rating.
Chemical Resistance ASTM D 1308 Utilizing 10% Muriatic Acid for an exposure time of 15 minutes, there shall be no loss of film adhesion or visual change when viewed by the unaided eye.
ASTM D 1308 Utilizing 20% Sulfuric Acid for an exposure time of 18 hours, there shall be no loss of film adhesion or visual change when viewed by the unaided eye.
ASTM D 2244 Utilizing 70% reagent grade Nitric Acid vapor for an exposure time of 30 minutes, there is a maximum color change of 5 Delta E units.

* ASTM: American Society for Testing and Materials
 
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