Durometer hardness is a property presented on technical data sheets that shows how hard the resin is in the cured state.
A durometer gauge is the actual measuring device consisting of a small drill or blunt indentor point under pressure. Different measurement scales are used for different materials depending on how soft or hard the material.
The following chart compares three (3) different graduated measurement scales and relates hardness values to some common objects.
|Shore A||Shore D||Rockwell M||Reference Object|
|30||–||–||Art Gum Eraser|
|40||–||–||Pink Pearl Eraser|
|–||78||32||Douglas Fir Plywood|
|–||90||125||Glass or Formica|
The higher the number within each scale, the harder the material. Shore readings are typically used for plastics. Shore A is for softer materials; Shore D is for harder materials. Rockwell readings are typically used for metals.
The following are some common conversions that might be helpful when utilizing Toagosei products:
- 1 milliliter (ml) = 1 cubic centimeter (cc)
- 1,000 ml = 1 liter
- 29.5 ml = 1 fl. oz.
- 3.78 liters = 1 gallon
- 473 ml = 1 pint
- 454 grams = 1 lb.
- 500 grams = 1.1 lb.
- 947 ml = 1 quart
- 1 kilogram = 2.2 lbs.
- Weight to Volume: grams ÷ specific gravity = cc (ml)
- Volume to Weight: cc (ml) x specific gravity = grams
- Density = specific gravity x 0.99823
- Centipoises = centistokes x density (at a given temp.)
- Temperature: Degrees F – 32 x 0.556 = degrees C
- Temperature: Degrees C x 1.8 + 32 = degrees F
- Square Inches to Square Feet: ÷ by 144
- Square Feet to Square Inches: x by 144
- In./lbs. ÷ 12 = ft./lbs.
- Ft./lbs. x 12 = in./lbs.
- 16 in. oz. = 1 in. lb.
- 192 in. oz. = 1 ft. lb.
Length x Width x Bondline Thickness x 16.4 = cc/ml requirement per part
Non-threaded Cylindrical Parts:
Diameter x Engagement Length x Bondline Thickness (on radius / per side) x 3.14 x 16.4 = cc/ml requirement per part
For no induced gap, make the bondline thickness figure 0.001″; 16.4 is a constant for converting cubic inches to cubic centimeters.
What is the Toagosei shelf life policy for Aron Alpha branded products?
UNOPENED cyanoacrylate products must be stored under refrigerated conditions at 2°C (36°F) to 8°C (46°F). Storage below 2°C (36°F) or greater than 8°C (46°F) can adversely affect product properties.
Unopened cyanoacrylate products should be brought to ambient temperature before the package is opened. Once opened, it should be left at ambient temperature. Products requiring storage at conditions other than those specified here are labeled accordingly.
Material removed from containers may be contaminated during use. Do not return product to original containers. Toagosei cannot assume responsibility for product that has been contaminated or stored under conditions other than as recommended.
Viscosity is a product property associated with all Aron Alpha adhesives and Arontite sealants. Viscosity is defined as a measure of the resistance of a fluid to flow (usually through a specific orifice). A measure of this fluid “thickness” is expressed in centipoise values. The higher the number, the thicker the product. Thicker products are less flowable and, in most cases, will fill a larger gap if necessary.
The following chart relates viscosity to some products we are all familiar with:
|Common Item||Approximate Viscosity in Centipoise (cps)||Cyanoacrylates|
|Water||1 to 5||201, 221|
|Corn Oil||50 to 100||241F, 202|
|Maple Syrup||150 to 200|
|Castor Oil||250 to 500||232, 252F|
|Motor Oil SAE 60||1,000 to 2,000||203, 203TX|
|Honey||2,000 to 3,000|
|Molasses||5,000 to 10,000||253TX|
|Chocolate Syrup||10,000 to 25,000|
|Ketchup||50,000 to 70,000|
|Peanut Butter||150,000 to 250,000||Gel 10|
|Shortening||1,000,000 to 2,000,000|
|Caulking Compound||5,000,000 to 10,000,000|