| abstract |
Prodn. of continuous strip with the greatest strength in a transverse direction by (a) placing continuous, lengthwise extended threads on both sides of a flat belt without end, the threads being parallel with the edges of the belt, (b) winding threads around the strip in such a manner that the threads do not cover each other, (c) bonding the cross threads to the lengthwise threads, (d) cutting through the cross threads parallel with the edge of the strip, and (e) removing the formed strip from the belt. - The tensile strength of the cross threads is pref. at least twice that of the lengthwise threads. The bonding agent can consist of lengthwise threads, which bond to the cross threads. The cross threads pref. consist of glass fibres. The strips are pref. used in the prodn. of reinforced plastic tube, by winding a cover consisting of a plastic containing annular thread windings of high strength threads upon a core, then placing the strips in partly overlapping relation within the winding, and curing the plastic. - The strips give excellent reinforcement to the walls of the plastic tubes, the additional strength being provided in a desired direction. |