An apparatus is intended to produce a multi-layer extrudate comprising an intermediate material interposed between at least two layers of outer material. The apparatus comprises an arrangement of ducts which includes a first duct and a second duct through which respective lateral flows of outer material can flow. The arrangement of ducts also includes a further duct through which a central flow comprising at least the intermediate material can flow. The apparatus further comprises at least one obstructing element for interacting at least with the central flow while the central flow is advancing in an advancement direction. The at least one obstructing element is movable with a movement having a component directed transversally to the advancement direction, so as to obstruct the central flow in the advancement direction at preset intervals.

An apparatus is intended to produce a multi-layer extrudate comprising an intermediate material interposed between at least two layers of outer material. The apparatus comprises an arrangement of ducts which includes a first duct and a second duct through which respective lateral flows of outer material can flow. The arrangement of ducts also includes a further duct through which a central flow comprising at least the intermediate material can flow. The apparatus further comprises at least one obstructing element for interacting at least with the central flow while the central flow is advancing in an advancement direction. The at least one obstructing element is movable with a movement having a component directed transversally to the advancement direction, so as to obstruct the central flow in the advancement direction at preset intervals.

Provided are an inorganic substance powder-blended biodegradable resin composition exhibiting excellent processability, sufficient mechanical strength and excellent flexibility as a molded product, and having economic advantage, as well as having excellent degradability under a natural environment and a molded product formed by using the composition. Provided is a molded product molded by using an inorganic substance powder-containing biodegradable resin composition including: a biodegradable resin and an inorganic substance powder in a range by mass of 10:90 to 70:30, in which the biodegradable resin is a multicomponent hydroxyalkanoic acid copolymer comprising lactic acid and other hydroxyalkanoic acid and the inorganic substance powder is heavy calcium carbonate.

A method for manufacturing an external component for watches or jewellery, especially a bracelet, includes the steps of: providing a substrate including a first face opposite to a second face and co-extrusion coating the first face and the second face of the substrate respectively with a first and a second band of synthetic material. The first band forms on the first face a transparent or translucent layer so that all or part of the substrate remains visible.

A method for manufacturing an external component for watches or jewellery, especially a bracelet, includes the steps of: providing a substrate including a first face opposite to a second face and co-extrusion coating the first face and the second face of the substrate respectively with a first and a second band of synthetic material. The first band forms on the first face a transparent or translucent layer so that all or part of the substrate remains visible.

A protective film of the present invention is used at the time of performing heat bending on the resin substrate, and includes a base material layer and a pressure sensitive adhesive layer adhered to a resin substrate, in which the base material layer includes a first layer which is positioned on an opposite side of the pressure sensitive adhesive layer and has a melting point of 150° C. or higher, and includes a second layer which is positioned on a pressure sensitive adhesive layer side and has a melting point of lower than 150° C., the pressure sensitive adhesive layer has a melting point of lower than 150° C., and MFR of a thermoplastic resin contained in the second layer, which is measured in conformity with JIS K7210, is in a range of 0.5 g/10 min to 4.0 g/10 min.

The present invention discloses a multilayer composite rubber-plastic foam insulation material and a preparation method thereof. The composite rubber-plastic foam insulation material includes a two-layer structure; the two-layer structure includes an insulation layer and a first functional layer; the insulation layer and the first functional layer are both made of a rubber-plastic foam material; the first functional layer and the insulation layer are integrally molded by blending extrusion and vulcanization foaming, and the first functional layer and the insulation layer form an integral structure. The multilayer composite rubber-plastic foam insulation material provided by the present invention adopts a vulcanization foaming integral molding process, and not only ensures the thermal insulation property of the insulation layer, but also gives the functional layer corresponding functions by selecting different functional polymers, thereby satisfying a variety of personalized needs in engineering applications.

An advanced siding panel that combines a traditional siding appearance with improved insulation, structural integrity, and improved thermal characteristics.

Described herein are UV reflective particles, and methods of forming UV reflective particles, comprising extruding a film having a plurality of alternating layers of polycarbonate (PC) and poly(methyl methacrylate) (PMMA), wherein each layer is less than 150 nm thick, and grinding the film into particles having a median particle size less than 200 microns.

Described herein are UV reflective particles, and methods of forming UV reflective particles, comprising extruding a film having a plurality of alternating layers of polycarbonate (PC) and poly(methyl methacrylate) (PMMA), wherein each layer is less than 150 nm thick, and grinding the film into particles having a median particle size less than 200 microns.