# US 5,700,414 A · Heat-insulating panel serving as concrete form and method of manufacturing the same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,700,414 A
- Document ID: US5700414A
- Status: Granted
- Kind: A
- Application number: 08/552,600
- Filed: 1995-11-03
- Granted: 1997-12-23
- Earliest claimed: 1994-03-23
- Assignees: Nihon Cement Co., Ltd.; Fuji Kasei Kogyo Co., Ltd.
- Inventors: Yuukou Ishikawa; Noboru Nishimoto; Michio Ootani; Tooru Tanibe; Kazushige Suzuki; Kanesuke Kasahara
- Web page: https://patentgrep.com/patent/US5700414A

## CPC

- F16L 59/02: Shape or form of insulating materials, with or without coverings integral with the insulating materials
- B29C 43/003: {characterised by the choice of material}
- E04B 1/80: slab-shaped
- E04B 2/86: made in permanent forms
- E04C 2/16: of fibres, chips, vegetable stems, or the like
- E04G 9/10: with additional peculiarities such as surface shaping, insulating or heating, permeability to water or air
- H05K 9/0003: {Shielded walls, floors, ceilings, e.g. wallpaper, wall panel, electro-conductive plaster, concrete, cement, mortar}
- B29K 2105/26: Scrap {or recycled material}
- B29L 2031/772: {Articles characterised by their shape and not otherwise provided for (closed loop B29L2031/709; ring-like B29L2031/7096; corrugated B29L2016/00, flat B29L2007/00; hollow B29L2022/00; screw-threaded B29L2001/00; toothed B29L2031/775; corrugated tubes B29L2023/18)}
- E04B 2001/746: {Recycled materials, e.g. made of used tires, bumpers or newspapers}
- E04B 2001/8428: {containing specially shaped acoustical bodies, e.g. funnels, egg-crates, fanfolds}
- E04B 2001/925: {Protection against harmful electro-magnetic or radio-active radiations, e.g. X-rays}
- Y10S 428/92: Fire or heat protection feature
- Y10T 428/249921: Web or sheet containing structurally defined element or component
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001})
- E04C: STRUCTURAL ELEMENTS; BUILDING MATERIALS (for bridges E01D; specially designed for insulation or other protection E04B; elements used as building aids E04G; for mining E21; for tunnels E21D; structural elements with broader range of application than for building engineering F16, particularly F16S)
- E04G: SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The present invention relates to a heat-insulating panel formed of curly contracted pieces of tapes, for example thermally contracted pieces of magnetic tapes, and a method of manufacturing such a panel. In particular, the present invention concerns a heat-insulating panel which also serves as a concrete form. The heat-insulating panel has excellent strength characteristics such, as bending strength and bending rigidity, and dimensional stability, as well as characteristics of sound absorption, heat-insulation, electrostatic shielding and electromagnetic wave absorption, and is usable for a concrete form when placing concrete during the construction of a building formed of reinforced concrete or steelframe reinforced concrete. The present invention relates also to a method of manufacturing the panel.

## Claims

### Claim 1

A method of manufacturing a heat-insulating panel serving as a concrete frame comprising the steps of:
cutting or shredding magnetic tapes, such as video tapes or cassette tapes, in lengths of 20 mm or less;
heating said cut or shredded pieces of magnetic tapes at a temperature from 100.degree. to 200.degree. C., thereby obtaining curled contracted pieces of magnetic tapes;
adding a thermosetting resin binder to said curled contracted pieces of magnetic tapes; and
compression-molding said curled contracted pieces of magnetic tapes mixed with said binder at a temperature from 100.degree. to 200.degree. C.

### Claim 2

A method of manufacturing a heat-insulating panel serving as a concrete frame comprising the steps of:
preparing contracted pieces having lengths of 20 mm or less of magnetic tapes, such as video tapes or cassette tapes, said cut or shredded pieces containing those having lengths from 5 to 20 mm in an amount of 50% or more on the basis of the total tape weight;
adding 10 to 50 parts by weight of a thermosetting resin binder to 100 parts by weight of said contracted pieces of magnetic tapes, said binder comprising a material capable of becoming hard and molded by heating, at least one selected from the group consisting of phenol resin, urea resin, polyester resin, polyurethane resin, epoxy resin or melamine resin; and
compression-molding said contracted pieces of magnetic tapes added with said binder under a pressure from 2 to 20 kgf/cm.sup.2 at a temperature from 100.degree. to 200.degree. C.