US 5,712,003 A · Blow-molded articles for automobile exterior parts and the process therefor

Abstract

Provided is a blow-molded article which can be readily formed with good Gloss and with substantially no surface unevenness, even without application of surface coating, and which can be used as a finished product without further treatment. The blow-molded article has a base layer and a surface layer. The base layer is formed from a thermoplastic resin material having a melt index (MI) of about 0.05-2.0 and a flexural modulus of 1,470 MPa (15,000 kgf/cm.sup.2) or more. The surface layer is formed from a colored or transparent thermoplastic resin material having an MI of about 1-30 provided that it is higher than that of the base layer, and excellent weather resistance. The thermoplastic resins used to form the base and surface layers should be resins of the same family.

Claims27

Dependent claims

A blow-molded article made from a multi-layer parison that includes a discrete base layer and a discrete surface layer,

said base layer being formed from a first thermoplastic resin material having a melt index of about 0.05-2.0 and a modulus of elasticity in bending of at least about 1,470 MPa (15,000 kgf/cm.sup.2),
said surface layer being formed from a second thermoplastic resin material having a melt index of about 1-30, wherein the melt index of said surface layer is higher than the melt index of said base layer, wherein said first and second thermoplastic resin materials contain at least one common resin component or common monomer unit component and are adhered together.

Dependencies are inferred from the claim text.

Blow-molded articles for automobile exterior parts and the process therefor

Life of this patent

Blow-molded articles for automobile exterior parts and the process therefor

Life of this patent

Abstract

Claims27