Based on the mechanism of heat generation at the welding interface, welding methods for thermoplastics can be classified as external and internal heating methods, as shown in Fig 1. Fig. 1. Classification of welding methods for semi-finished polymeric materials.
ritalin is the brand name of the drug methylphenidate hydrochloride doctors prescribe ritalin to treat attention deficit hyperactivity disorder adhd and a sleep disorder known as narcolepsy
Ritalin Addiction. RitalinÂ® is the trade name for Methyphenidate, a stimulant type of drug related to amphetamines. The neurological effects are also similar to cocaine.It is used primarily to treat Attention Deficit Hyperactivity Disorder (ADHD).s a drug of abuse, users are seeking a high similar to cocaine or amphetamine. Ritalin addiction is less likely in those suffering from ADHD because the pleasurable effects of the drug are less likely. Physical addiction may occur, however, in any person who uses the drug long-term or in high doses.