[특허]Process for producing laminated bituminous roofing membrane

[미국특허] Process for producing laminated bituminous roofing membrane 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B32B-007/10 C09J-003/30 C09J-005/04
출원번호	US-0575539 (1975-05-08)
우선권정보	JA-0016906 (1972-02-19)
발명자 / 주소	Tajima Eiichi (Tokyo JA) Yamamoto Kaname (Tokyo JA) Imai Takayoshi (Tokyo JA)
출원인 / 주소	Tajima Roofing Co., Ltd. (Tokyo JA 03)
인용정보	피인용 횟수 : 39 인용 특허 : 0

초록 ▼

A novel self-adhesive type multi-layer laminated bituminous roofing membrane suitable for the formation of the roofing or waterproofing layer on roofs, floors and the like is provided. It comprises a base sheet of a sheet-like material, one or more bitumen layers coated on all or part of one or both faces of the base sheet, at least one layer of compound bitumen including both bitumen and rubber and/or resin laminated on all or part of the surface of said bitumen-coated layer on the base sheet and at least one release sheet laid over the whole surface of said compound bitumen layer. This roofing membrane is produced by uniting the bitumen-coated base sheet and the compound bitumen-coated release sheet, and can be applied over a substrate in a simple manner, without the step of melting or liquefying bitumen as in the conventional application process.

대표청구항 ▼

A process for producing a self-adhesive, multi-layer, laminated, bituminous, roofing membrane suitable for cold application to a substrate, which comprises the step of: a. continuously moving a continuous web of a flexiblE base sheet through a first coating device and therein coating at least a part of at least one surface of said base sheet with a continuous surface coating layer of substantially uniform thickness of hot molten roofing bitumen in a viscous liquid state, said roofing bitumen having the property that it is substantially solid at amibient application temperature to form a waterproof layer on said base sheet; b. separately from step (a) but simultaneously therewith, continuously moving a continuous web of a flexible release sheet through a second coating device and therein coating substantially the entirety of only one releasable surface of said release sheet with a continuous surface coating layer of substantially uniform thickness of hot molten compound bitumen in a viscous liquid state, said compound bitumen consisting essentially of bitumen and about 5 to 95 percent by weight of substance selected from the group consisting of rubber, thermoplastic resin and mixtures thereof, said compound bitumen having the property that it possesses a high tackiness at ambient application temperature; c. immediately after steps (a) and (b) and while said surface coating layers on the coated webs obtained in steps (a) and (b) are still in a molten state, continuously conjointly moving said coated webs around and in supported relationship on a circumferentially elongated portion of the periphery of a roller with one of said coated webs being disposed with its sheet in surface contact with said circumferentially elongated portion of the periphery of said roller and with its surface coating layer facing outwardly away from said roller and with the other of said coated webs having its surface coating layer disposed in face-to-face opposing relationship to said surface coating layer of said one coated web and with its sheet being disposed outwardly therefrom, and drawing said other web into contact with said one web and thereby uniting said surface coating layers in direct face-to-face contact as said webs move together around said circumferentially elongated portion of said roller, said uniting of said surface coating layers being effected in the absence of an external compression force applied to the sheet of said other web whereby to form a unitary roofing membrane consisting essentially of the products of steps (a) and (b) wherein said coating layers are between said base sheet and said release sheet and are united thereto and to each other; and then d. continuously moving said unitary roofing membrane through a cooling device whereby to solidify said coating layers.

이 특허를 인용한 특허 (39) 인용/피인용 타임라인 분석

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Cooper Gregory R. (Swanwick GB2) Pragnell Robert J. (Cheltenham GB2), Method of forming a waterproof roof.
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[미국특허] Process for producing laminated bituminous roofing membrane 원문보기

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