초록 ▼

A blank (2) is molded for the manufacture of a multi-layer preform (1). The blank possesses protrusions (5). After the protrusions (5) have been brought to a plasticized state under the action of heat, those surfaces that contain protrusions (5) are covered by a layer of plasticized material. The bl

A blank (2) is molded for the manufacture of a multi-layer preform (1). The blank possesses protrusions (5). After the protrusions (5) have been brought to a plasticized state under the action of heat, those surfaces that contain protrusions (5) are covered by a layer of plasticized material. The blank (2) becomes connected to the layer (6) in the area of the protrusions (5). After cooling of the preform created from the blank (2) and the layer (6), the blank (2) will be connected with the layer (6) by means of microweld positions (7) in the area of the said protrusions (5). With that, delamination of the preform (1) during further processing or use will be effectively prevented.

대표청구항 ▼

[ What is claim is:] [1.]1. A method of manufacturing a multi-layer laminated preform made of plastic comprising the steps of:(a) providing a blank having at least one area of protrusion on its surface;(b) heating said surface of the blank so as to melt or plasticize each protrusion;(c) applying a p

[ What is claim is:] [1.]1. A method of manufacturing a multi-layer laminated preform made of plastic comprising the steps of:(a) providing a blank having at least one area of protrusion on its surface;(b) heating said surface of the blank so as to melt or plasticize each protrusion;(c) applying a plasticized or liquid layer of a plastic onto the heated surface of the blank and forming a spot or zone shaped welding position at least between each protrusion and the adjacent surface of the layer to produce a preform; and(d) cooling the preform and solidifying each welding position such that said preform is blow moldable to make a container.