초록 ▼

Article made of thermoplastic material, which article is rigid and at least partly heat insulating. The article includes a laminate in at least parts of the article. The laminate includes a first and a second layer of solid thermoplastic material (A) and an intermediate layer of expanded thermoplast

Article made of thermoplastic material, which article is rigid and at least partly heat insulating. The article includes a laminate in at least parts of the article. The laminate includes a first and a second layer of solid thermoplastic material (A) and an intermediate layer of expanded thermoplastic material (B) with an average density of 50-800 kg/m3. The thermoplastic materials (A) and (B) are the same or compatible materials. The article is manufactured according to a process comprising the steps a) forming of a solid outer layer, b) manufacturing of an intermediate expanded layer and c) the appendage of functional parts such as reinforcing profiles, guiding profiles, stacking profiles, hinge parts, pockets, label holders, profiles or holes for automatic handling, locking devices or the like.

대표청구항 ▼

1. A process for the manufacturing of a hollow article made of plastic comprising a solid outer layer with an intermediate expanded layer and a functional part selected from the group consisting of reinforcing profiles, guiding profiles, stacking profiles, hinge parts, pockets, label holders and pro

1. A process for the manufacturing of a hollow article made of plastic comprising a solid outer layer with an intermediate expanded layer and a functional part selected from the group consisting of reinforcing profiles, guiding profiles, stacking profiles, hinge parts, pockets, label holders and profiles for automatic handling and locking, the process comprising:extruding a first thermoplastic material into a sheet or tube shaped work piece forming a first layer; adding further molten first thermoplastic material, molten second thermoplastic material and an expanding agent to the work piece by extrusion to form a laminate comprising a first and a second layer of solid first thermoplastic material and an intermediate layer of an expanded second thermoplastic material with an average density of 50-800 kg/m3 which together forms the tube or sheet shaped workpiece; shaping the workpiece by at least one method selected from the group consisting of vacuum forming and blow molding in a mold having a mold cavity with special cavities which cavities are negative depictions of the functional part, by means of at least one selected from the group consisting of gas pressure and vacuum; filling the special cavities with a molten third thermoplastic material to form the functional part; and integrating the functional part with the remainder of the article.