MULTILAYER MOLDED ARTICLE AND METHOD FOR PRODUCING THE SAME

• Main Authors: MATSUMOTO, MASAHITO, HARA, TAKAHISA, NAKADA, HITOSHI
• Format: Patent
• Language: English; French
• Published: 26.10.1992
• Edition: 5
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The present invention is directed to a multilayer molded article produced using a composite skin layer made of a skin material and a foam sheet on a core layer of a thermoplastic resin in which tensile modulus E of the skin material is not larger than 950 kg/cm2, and tensile modulus E (kg/cm2), heat shrinkage factor F (%) and thickness t (cm) of the skin material satisfy the following relationship: 20/(E x t) + F .gtoreq. 2.5. This produces a large size multilayer molded article having a complicated shape and no wrinkles, breakage or uneven marks in the skin material on the surface of the article. A multilayer molded article is produced using a composite skin layer made of a skin material and a foam sheet on a core layer of a thermoplastic resin in which a tensile modulus E of the skin material is not larger than 950 kg/cm2, and a tensile modulus E (kg/cm2), a heat shrinkage factor F (%) and a thickness t (cm) of the skin material satisfy the following relationship: 20/(E x t) + F ? 2.5, which method produces a large size multilayer molded article having a complicated shape and no wrinkles, breakage or uneven marks in the skin material on the surface of the article.