US 2002/0172794 A1 · Vacuum heat-insulating panel and method of manufacturing the same

Abstract

The present invention is directed to cost-effectively provide a high-strength large vacuum heat-insulating panel with a honeycomb core of non-permeable independent cells by means of simplified instruments and method. One goal of the invention is that the core retains an original shape at its lateral ends from the beginning of a procedure of evacuating air into a vacuum condition till the end of panel bonding, and another is ensuring a long lasting air-tight sealing in the honeycomb core. The vacuum heat-insulating panel 100 according to the invention includes a vacuum core element (50) of non-permeable honeycomb structure and a surface element (60) bonded thereto by fusing an air-permeable bonding element (woven cloth made of fibrous adhesive of thermoplastic resin or unwoven cloth of the fibrous adhesive) 70. The surface element 60 has its edges bent to provide protection covers 65.

Claims9

Dependent claims

A vacuum heat-insulating panel having a core retaining inside in a vacuum condition and superposed and bonded with a surface element, wherein the vacuum core is formed of a honeycomb core element made of a non-permeable material, and an air-permeable bonding element is fused to bond the surface element to the vacuum core.

A method of manufacturing a vacuum heat-insulating panel having a core retaining inside in a vacuum condition and superposed and bonded with a surface element, comprises the steps of

superposing the core with the surface element through an adhesive interposed therebetween to produce a multi-layered element,
covering the multi-layered element with a synthetic resin film and evacuating the air within the cover of the synthetic resin film into a vacuum condition to produce a vacuum core element, and
heating and pressing the covered multi-layered element having the vacuum core element at its center, thereby bonding the surface element to the core by the adhesive,
the core being formed of a honeycomb core element made of a non-permeable material, the adhesive being either woven or unwoven cloth of fibrous thermoplastic resin, the air inside the core being evacuated through pores in the woven or unwoven cloth during the step of evacuating air to create a vacuum condition, and the adhesive being fused so as to bond the surface element to the core during the step of heating and pressing.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

10/125,390Filed 19 Apr 2002

Priority

JP 2001-14888818 May 2001

Published

21 Nov 2002

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

B32B 3/12
Characterised by a discontinuous layer, i.e. formed of separate pieces of material: characterised by a layer of regularly- arranged cells, e.g. a…
B32B 3/04
Characterised by features of form at particular places, e.g. in edge regions: characterised by at least one layer folded at the edge, e.g. over…
B32B 7/12
Interconnection of layers: using interposed adhesives or interposed materials with bonding properties
B32B 15/08
Comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material: of synthetic resin

Vacuum heat-insulating panel and method of manufacturing the same

Life of this patent

Vacuum heat-insulating panel and method of manufacturing the same

Life of this patent

Abstract

Claims9