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.
A small change in. temperature results in large change in forming force. This technique can be used to process all thermoforming grades of. polypropylene. Melt phase forming is performed at temperatures ranging from 170ÂºC to 180ÂºC and requires polypropylene grades with a. high melt strength. Parts formed with Melt phase forming are more even, have lower residual stress and greater heat. resistance.