Claims
- 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.
- 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.
Priority Claims (1)
Number |
Date |
Country |
Kind |
6-51718 |
Mar 1994 |
JPX |
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Parent Case Info
This is a divisional of application Ser. No. 08/331,715, filed on Oct. 31, 1994, now U.S. Pat. No. 5,631,075.
Divisions (1)
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Number |
Date |
Country |
Parent |
331715 |
Oct 1994 |
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