Method of producing a foam-insulated electric wire using a blowing agent mixture
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0086505
(1993-07-01)
|
우선권정보 |
JP-0406865 (1990-12-26); JP-0294257 (1991-11-11) |
발명자
/ 주소 |
- Sakamoto Kazuhide (Tokyo JPX) Sugimura Masanobu (Ichihara JPX)
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출원인 / 주소 |
- The Furukawa Electric Co., Ltd. (Tokyo JPX 03)
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인용정보 |
피인용 횟수 :
9 인용 특허 :
0 |
초록
▼
In producing a foam insulated electric wire having an insulating layer made of a polyolefin foam, a foaming agent is employed, which is a liquid mixture of at least two kinds of compounds selected from the group consisting of ethers, esters, ketones and saturated hydrocarbons having boiling points o
In producing a foam insulated electric wire having an insulating layer made of a polyolefin foam, a foaming agent is employed, which is a liquid mixture of at least two kinds of compounds selected from the group consisting of ethers, esters, ketones and saturated hydrocarbons having boiling points of 100°C. or below, or a liquid mixture of at least one kind of compound selected from the group consisting of ethers, esters, ketones and saturated hydrocarbons having boiling points of 100°C. or below and at least one kind of liquid compound selected from the group consisting of ethers, esters, ketones, saturated hydrocarbons and alcohols having boiling points higher than 100°C. but not exceeding 150°C. Thus, a foam insulating layer having a high cell content and a low deformation ratio become available. Since the foam insulating layer has a high cell content and a low deformation ratio, the foam insulating layer, if reduced in diameter, is hardly squeezed. Since the foaming agent is a liquid, it can be supplied in an exact amount. The obtained wire is useful as a core applied to a high-speed signal transmission cable, an under-carpet cable, etc.
대표청구항
▼
A method of producing a foam-insulated electric wire, which provides a cell content of at least 50% and a normal temperature deformation ratio not greater than 10%, comprising: (a) supplying a polyolefin resin composition into a resin inlet of a screw extruder; (b) injecting a foaming agent through
A method of producing a foam-insulated electric wire, which provides a cell content of at least 50% and a normal temperature deformation ratio not greater than 10%, comprising: (a) supplying a polyolefin resin composition into a resin inlet of a screw extruder; (b) injecting a foaming agent through a portion between said resin inlet and an extrusion port of said extruder; and (c) extruding a molten mixture of said polyolefin resin composition and said foaming agent to coat a surface of a wire conductor with said mixture, wherein said foaming agent is a liquid mixture of at least one liquid compound of Group (I) selected from the group consisting of at least one ether, at least one ester, at least one ketone and at least one saturated hydrocarbon, having boiling points of 100°C. or below, and at least one liquid compound of Group (II) selected from the group consisting of at least one ether, at least one ester, at least one ketone, at least one saturated hydrocarbon and at least one alcohol, having boiling points higher than 100°C., but not exceeding 150°C., said foaming agent comprising said at least one compound of Group (I) and said at least one compound of Group (II) in a mole ratio of Group (I) to Group (II) of 1:1 to 9:1.
이 특허를 인용한 특허 (9)
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Handa, Y. Paul, Expanded and extruded biodegradable and reduced emission foams made with methyl formate-based blowing agents.
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Handa, Y. Paul; Francis, Gary A., Expanded and extruded polyolefin foams made with methyl formate-based blowing agents.
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Kun-Hsiung Chiu TW; Hua-Mu Liu TW, Foaming and forming method for soft and hard type poly products.
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Cheung, Yunwa Wilson; Dobreski, David V.; Turner, Richard; Wheeler, Mark; Handa, Y. Paul, Polymer blends of biodegradable or bio-based and synthetic polymers and foams thereof.
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Cheung, Yunwa Wilson; Dobreski, David V.; Turner, Richard; Wheeler, Mark; Handa, Y. Paul, Polymer blends of biodegradable or bio-based and synthetic polymers and foams thereof.
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Handa, Y. Paul; Francis, Gary A.; Castner, Glenn C.; Zafar, Mohammad, Reduced-VOC and non-VOC blowing agents for making expanded and extruded thermoplastic foams.
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Handa, Y. Paul; Francis, Gary A.; Castner, Glenn C.; Zafar, Mohammad, Reduced-VOC and non-VOC blowing agents for making expanded and extruded thermoplastic foams.
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Handa, Y. Paul; Francis, Gary A.; Castner, Glenn C.; Zafar, Mohammad, Reduced-VOC and non-VOC blowing agents for making expanded and extruded thermoplastic foams.
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Handa, Y. Paul; Francis, Gary A.; Castner, Glenn C.; Zafar, Mohammad, Reduced-VOC and non-VOC blowing agents for making expanded and extruded thermoplastic foams.
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