Signs and Symptoms. Because the signs of AS can be similar to those of other behavioral problems, it's best to let a doctor or other health professional evaluate a child's symptoms. Many kids are diagnosed with attention deficit hyperactivity disorder (ADHD) before a diagnosis of AS is made later.
Rubber begins to melt at approximately 180 degrees Celsius. At low temperatures, around 5 C to 6 C, there is a risk that rubber hardens because of crystallization. The optimum temperature for rubber is 20 C.
Final strength is reached later. Reactive polyurethane hot melts yield rubbery and plastic cured films. Curing hot melts have the advantage that they can be applied at very low temperatures, 125 to 250 o F (50 to 120Â°C). In contrast, standard hot melts are applied at higher temperatures 250 to 470 o F (120 to 240Â°C).