Abstract: A method for making a non-peelable, sterilizable receptacle having a low particulate count for receiving articles for storage in pharmaceutical intermediate processing. This method involves providing a continuous first web of polyolefin film, providing a continuous second porous web of spun-bonded polyolefin film. The webs are advanced through cleaning processes that include an anti-static device, an ultrasonic vibrating device and a vacuum device. The two clean webs are then brought together and passed into the heat sealing section. The webs are heated welded together by forming continuous seams on the webs to form an open pouch. The seams are made by applying opposing platens at a pressure between about 30 to about 40 psi to both the webs and a heat welding element at a temperature of about 330.degree. to about 380.degree. F. against only the first web. This causes the first web to melt into the pores of the second web.