초록 ▼

A process for the manufacture of an Al/plastic laminate foil is described. The laminate comprises an aluminum foil with plastic foil stuck on to at least one of its sides whereby the plastic foils exhibits an elongation at fraction of 80-100% and the adhesive joining the components achieves a shear

A process for the manufacture of an Al/plastic laminate foil is described. The laminate comprises an aluminum foil with plastic foil stuck on to at least one of its sides whereby the plastic foils exhibits an elongation at fraction of 80-100% and the adhesive joining the components achieves a shear strength of at least 0.3 N/mm2. The plastic foils bear a greater part of the applied load when the laminate foil is stressed. The laminate foil is suitable for the manufacture of containers by deep drawing whereby no cracks or macropores form in the Al foil. The laminate effectively excludes light, water vapor and aromas from external sources and prevents the loss of aroma from the contents of such containers.

대표청구항 ▼

An aluminum-plastic laminate foil having good elongation without the formation of cracks or macropores for the production of deep-drawn containers, said laminate having a plastic foil bonded substantially throughout to at least one side of an aluminum foil, wherein said containers effectively exclud

An aluminum-plastic laminate foil having good elongation without the formation of cracks or macropores for the production of deep-drawn containers, said laminate having a plastic foil bonded substantially throughout to at least one side of an aluminum foil, wherein said containers effectively exclude light, oxygen, water vapor and aromas from external sources and which prevent loss of aroma from the contents which consist of sensitive substances such as foodstuffs, pharmaceuticals, chemicals, and the like, said laminate comprising: an aluminum foil; at least one layer of an adhesive on at least one surface of said aluminum foil, said adhesive achieving a shear strength of at least 0.3 N per mm.2; and at least one plastic foil which has an elongation at fracture of 80-180% bonded substantially throughout to said at least one surface of said aluminum foil by means of said adhesive, said aluminum foil being joined to said plastic foil in such a way to form a laminated foil component wherein all components of the laminate are load sharing and said plastic foil bearing a greater load than that of the aluminum foil, thereby increasing the elongatiOn at fracture of the aluminum foil in combination with plastic and thereby obtaining aluminum-plastic laminate foils which achieve an elongation of 40-120% in a tensile test without tearing or forming macropores.