Abstract: In the formation of an envelope or jacket for a disc, comprising laminating a nonwoven fabric to a plastic sheet, superposing two such laminates with the nonwoven fabrics facing each other, and joining such superposed laminates along all edges but one, thereby to form an envelope, the improvement which comprises effecting the laminating by providing a fusible layer between the nonwoven fabric and plastic sheet and heating to soften the fusible layer while pressing to join the nonwoven fabric to the plastic. The low melting fusible layer eliminates the tendency, in its absence, to pull particles of the jacket plastic through the nonwoven liner layer where it could damage the object to be encased in the envelope. Advantageously the fusible layer is a spray spun low melting polyester which, in addition to polyvinylchloride, is bondable to polycarbonate.