Article having fluororesin joint, and method for producing such article

Patent metadata

Field	Value
Publication number	US-9797536-B2
Application number	US-201414771314-A
Country	US
Kind code	B2
Filing date	Feb 27, 2014
Priority date	Feb 28, 2013
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

Provided are an article including a joint portion of a fluororesin having sufficient strength, and a method of producing the same. The article includes a joint portion including: a porous first layer of a first fluororesin; a second layer of a second fluororesin having a melting point lower than a melting point of the first fluororesin; and a non-porous third layer formed between the first layer and the second layer, the non-porous third layer including the first fluororesin.

First claim

The invention claimed is:

1. An article, comprising:
a joint portion comprising:
a porous first layer of a first fluororesin;
a second layer of a second fluororesin having a melting point lower than a melting point of the first fluororesin; and
a non-porous third layer formed between the first layer and the second layer, the non-porous third layer comprising the first fluororesin;

an inclusion; and
an exterior material covering the inclusion;
wherein:
the exterior material comprises at least one or more resin sheets having end portions to be joined to each other;
one of the at least one or more resin sheets is a porous sheet made of the first fluororesin;
the at least one or more resin sheets comprise a portion in which at least one of the end portions to be joined comprises the porous sheet, the portion being joined so that the portion comprises the joint portion, and the end portions are bonded to each other;
the inclusion is a heat insulating material; and
the article is a heat insulation product.

2. The article according to claim 1 , wherein:
the article comprises at least one or more resin sheets having end portions to be joined to each other;
one of the at least one or more resin sheets is a porous sheet made of the first fluororesin;
the at least one or more resin sheets comprise a portion in which at least one of the end portions to be joined comprises the porous sheet, the portion being joined so that the portion comprises the joint portion, and the end portions are bonded to each other; and
the portion is joined so that the end portions are bonded to each other by impregnating an inside of pores of the porous sheet with the second fluororesin having a melting point lower than the melting point of the first fluororesin.

3. The article according to claim 1 , wherein a difference between the melting point of the first fluororesin and the melting point of the second fluororesin is 10° C. or more.

4. The article according to claim 1 , wherein the porous sheet is sterically formed into a shape corresponding to a shape of an external surface of the inclusion in advance prior to joining the end portion of the porous sheet.

5. An article, comprising:
a joint portion comprising:
a porous first layer of a first fluororesin;
a second layer of a second fluororesin having a melting point lower than a melting point of the first fluororesin; and
a non-porous third layer formed between the first layer and the second layer, the non-porous third layer comprising the first fluororesin;

an inclusion; and
an exterior material covering the inclusion,
wherein:
the exterior material comprises at least one or more resin sheets having end portions to be joined to each other;
one of the at least one or more resin sheets is a porous sheet made of the first fluororesin;
the at least one or more resin sheets comprise a portion in which at least one of the end portions to be joined comprises the porous sheet, the portion being joined so that the portion comprises the joint portion, and the end portions are bonded to each other;
the inclusion is a heat generating material; and
the article is a heating jacket.

6. The article according to claim 5 , wherein the porous sheet is sterically formed into a shape corresponding to a shape of an external surface of the inclusion in advance prior to joining the end portion of the porous sheet.

7. The article according to claim 5 , wherein:
the article comprises at least one or more resin sheets having end portions to be joined to each other;
one of the at least one or more resin sheets is a porous sheet made of the first fluororesin;
the at least one or more resin sheets comprise a portion in which at least one of the end portions to be joined comprises the porous sheet, the portion being joined so that the portion comprises the joint portion, and the end portions are bonded to each other; and
the portion is joined so that the end portions are bonded to each other by impregnating an inside of pores of the porous sheet with the second fluororesin having a melting point lower than the melting point of the first fluororesin.

8. The article according to claim 5 , wherein a difference between the melting point of the first fluororesin and the melting point of the second fluororesin is 10° C. or more.

Assignees

• Nichias Corp

Inventors

• Miyazaki Makoto
• Seki Daisaku

Classifications

• H05B3/10

  Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor · CPC title

• B32B7/02

  Physical, chemical or physicochemical properties · CPC title

• B32B2597/00

  Tubular articles, e.g. hoses, pipes · CPC title

• B32B37/06

  characterised by the heating method · CPC title

• B32B2307/3065

  Flame resistant or retardant, fire resistant or retardant · CPC title