GB773809A - Method of manufacturing shaped elements from urea-formaldehyde foam - Google Patents

Method of manufacturing shaped elements from urea-formaldehyde foam

Info

Publication number
GB773809A
GB773809A GB27331/54A GB2733154A GB773809A GB 773809 A GB773809 A GB 773809A GB 27331/54 A GB27331/54 A GB 27331/54A GB 2733154 A GB2733154 A GB 2733154A GB 773809 A GB773809 A GB 773809A
Authority
GB
United Kingdom
Prior art keywords
foam
nozzle
heated
nozzles
tubes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB27331/54A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
COGEPA ETS
Original Assignee
COGEPA ETS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by COGEPA ETS filed Critical COGEPA ETS
Publication of GB773809A publication Critical patent/GB773809A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/36—After-treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2361/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
    • C08J2361/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08J2361/22—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
    • C08J2361/24—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with urea or thiourea

Abstract

Urea-formaldehyde foam having a fine foam structure is made into shaped articles by continuously moving the foam, in the cured but still deformable state, through a heated shaping device which compresses the foam, reduces its volume and provides it with a surface skin. Suitable Suitable devices are heated rollers and heated tapering nozzles. The foam may be conveyed through a tapering nozzle by conveyer means set into the wall of the nozzle. The nozzle diameter may taper in the ratio of 3:1 or 4:1. The nozzle may be heated to 250 DEG C. There may be several heated nozzles, through each of which in turn the foam passes. The foam may be moistened, as by spraying with water or wet steam or acid, basic or neutral liquid, before it is passed through the shaping device. When a nozzle is used, steam may be supplied through ducts in the nozzle walls. The foam may include a binder of granular or fibrous nature. Webs of paper or foils may be subsequently applied to the foam. Tubes, half-tubes, channels, &c. may be made by rollers, and cords about 0.5 mm. thick by nozzles.ALSO:Urea-formaldehyde foam having a fine foam structure is made into shaped articles by continuously moving the foam, in the cured but still deformable state, through a heated shaping device which compresses the foam, reduces its volume and provides it with a surface skin. Suitable devices are heated rollers and heated tapering nozzles. The foam may be conveyed through a tapering nozzle by conveyer means set into the wall of the nozzle. The nozzle diameter may taper in the ratio of 3 : 1 or 4 : 1. The nozzle may be heated to 250 DEG C. There may be several heated nozzles, through each of which in turn the foam passes. The foam may be moistened, as by spraying with water or wet steam or acid, basic or neutral liquid, before it is passed through the shaping device. When a nozzle is used, steam may be supplied through ducts in the nozzle walls. The foam may include a binder of granular or fibrous nature. Webs of paper or foils may be subsequently applied to the foam. Tubes, half-tubes, channels &c. may be made by rollers, and cords about 0,5 mm. thick by nozzles.
GB27331/54A 1953-09-23 1954-09-21 Method of manufacturing shaped elements from urea-formaldehyde foam Expired GB773809A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH773809X 1953-09-23

Publications (1)

Publication Number Publication Date
GB773809A true GB773809A (en) 1957-05-01

Family

ID=4535643

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27331/54A Expired GB773809A (en) 1953-09-23 1954-09-21 Method of manufacturing shaped elements from urea-formaldehyde foam

Country Status (1)

Country Link
GB (1) GB773809A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3400196A (en) * 1964-06-30 1968-09-03 Union Carbide Corp Method for the permanent compression of a sheet of flexible polyurethane foam

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3400196A (en) * 1964-06-30 1968-09-03 Union Carbide Corp Method for the permanent compression of a sheet of flexible polyurethane foam

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