Deep-draw-formed vessel and process for preparation thereof

A deep-draw-formed vessel which is formed from a laminate comprising (A) a steel foil having a thickness of 10 to 120 .mu.m and comprising a steel substrate having on each surface 0.03 to 0.5 g/m.sup.2 of a metallic chromium layer and 1 to 50 mg/m.sup.2, as Cr, of a chromium oxide layer formed on the metallic chromium layer, (B) inner and outer surface layers composed of a plastic film having a thickness of 10 to 150 .mu.m and comprising a composition comprising polypropylene and 2 to 50% by weight, based on the resin, of titanium dioxide, and (C) adhesive layers interposed between the steel foil and the inner and outer surface layers, which have an adhesive force of at least 600 g/15 mm of width and an elastic modulus of 200 to 9000 kg/cm.sup.2, wherein the laminate is deep-draw-formed so that the draw ratio R defined by the following formula:

• R=D/d
• wherein D stands for the diameter of the laminate to be deep-draw-formed and d stands for the diameter of the bottom of the vessel, is 1.5 to 2.4.

A process for the preparation of deep-draw-formed vessels, which comprises deep-draw-forming a laminate comprising a steel or iron foil and thermoplastic films covering both the surfaces of the steel or iron foil, wherein an inorganic filler is incorporated at least in the film layer to be located on the inner face side of a final vessel.

A deep-draw-formed vessel comprising a bottom, a side wall and a flange formed on the top end of the side wall, which is prepared by deep-draw-forming a laminate comprising (a) a steel or iron foil having a thickness of 10 to 120 .mu.m, (b) a plastic film formed on each surface of the steel or iron foil, said film having a thickness of 10 to 150 .mu.m, and (c) an adhesive layer interposed between the steel or iron foil and the plastic film, said adhesive having an adhesive force of at least 600 g/15 mm of width and an elastic modulus of 200 to 9000 kg/cm.sup.2.

A process for the preparation of deep-draw-formed vessels, which comprises deep-draw-forming a laminate comprising (a) a steel or iron foil having a thickness of 10 to 120 .mu.m, (b) a plastic film formed on each surface of the steel or iron foil, said film having a thickness of 10 to 150 .mu.m, and (c) an adhesive layer interposed between the steel or iron foil and the plastic film, said adhesive having an adhesive force of at least 600 g/15 mm of width and an elastic modulus of 200 to 9000 kg/cm.sup.2, wherein an organic filler is incorporated at least in the film layer to be located on the inner face of the final vessel in an amount of 2 to 50% by weight based on the resin.

A deep-draw-formed vessel comprising a bottom, a side wall and a flange formed on the top end of the side wall, which is prepared by deep-draw-forming a laminate comprising (a) a steel or iron foil having a thickness of 10 to 120 .mu.m, (b) a plastic film formed on each surface of the steel or iron foil, said film having a thickness of 10 to 150 .mu.m and containing an inorganic filler dispersed therein in an amount of 2 to 50% by weight based on the resin, and (c) an adhesive layer interposed between the steel or iron foil and the plastic film, said adhesive having an adhesive force of at least 600 g/15 mm of width and an elastic modulus of 200 to 9000 kg/cm.sup.2.