GB860947A - Improvements in or relating to the manufacture of flexible expanded thermoplastic materials - Google Patents

Improvements in or relating to the manufacture of flexible expanded thermoplastic materials

Info

Publication number
GB860947A
GB860947A GB2765756A GB2765756A GB860947A GB 860947 A GB860947 A GB 860947A GB 2765756 A GB2765756 A GB 2765756A GB 2765756 A GB2765756 A GB 2765756A GB 860947 A GB860947 A GB 860947A
Authority
GB
United Kingdom
Prior art keywords
vessel
gas
paste
pressure
tube
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
GB2765756A
Inventor
Desire Gonda
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.)
CUSHIONING ACCESSORIES Ltd
Original Assignee
CUSHIONING ACCESSORIES Ltd
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 CUSHIONING ACCESSORIES Ltd filed Critical CUSHIONING ACCESSORIES Ltd
Priority to GB2765756A priority Critical patent/GB860947A/en
Publication of GB860947A publication Critical patent/GB860947A/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
    • C08J9/30—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by mixing gases into liquid compositions or plastisols, e.g. frothing with air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7404—Mixing devices specially adapted for foamable substances
    • B29B7/7409—Mixing devices specially adapted for foamable substances with supply of gas
    • 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
    • C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2327/06—Homopolymers or copolymers of vinyl chloride

Abstract

<PICT:0860947/IV (a)/1> A process for the production of flexible expanded thermoplastic material comprises forming a fluid paste of the thermoplastic material and introducing it into a sealed vessel, discharging an inert gas under pressure into the lower part of the vessel so that the gas passes outwardly and upwardly through the fluid paste for dispersion therethrough, cutting off the supply of gas to the vessel and a releasing valve control means which allows the pressure differential between the interior and exterior of the vessel to discharge the contents of the vessel including all or substantially all the pressure gas therein as a creamy foaming mass through a siphon tube extending from substantially the bottom of the vessel to and through the upper part of the vessel, thorough dispersion of the gas in the fluid paste being achieved by turbulent dispersion set up during the introduction of the gas into the vessel and the withdrawal of the expanded material and gas simultaneously from the vessel. The thermoplastic material may be a mixture of a high molecular weight polyvinyl chloride resin and a non-paste forming polyvinyl chloride resin. These, in an example, are formed into a paste with the addition of tritolyl phosphate, lead silicate, barium stearate, cadmium stearate, silicone fluid, dioctyl phthalate and oleic acid. The paste is introduced (in one embodiment) into a pressure vessel 1. Gas (e.g. nitrogen or carbon dioxide) is passed in from cylinder 12 through the tube 6 provided with holes 14 and holes in the bottom of the tube, all drilled tangentially to a circle within the tube to produce turbulence in the paste when the gas is introduced. When the required pressure is reached first the closure valve 15 and then the trigger valve 17 are opened, with the nozzle 18 being directed into the mould. The mould containing the ejected creamy foamy paste is then heated at 150-165 DEG C. The foamed mass can also be coated on to textiles or leather.
GB2765756A 1956-09-10 1956-09-10 Improvements in or relating to the manufacture of flexible expanded thermoplastic materials Expired GB860947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2765756A GB860947A (en) 1956-09-10 1956-09-10 Improvements in or relating to the manufacture of flexible expanded thermoplastic materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2765756A GB860947A (en) 1956-09-10 1956-09-10 Improvements in or relating to the manufacture of flexible expanded thermoplastic materials

Publications (1)

Publication Number Publication Date
GB860947A true GB860947A (en) 1961-02-15

Family

ID=10263132

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2765756A Expired GB860947A (en) 1956-09-10 1956-09-10 Improvements in or relating to the manufacture of flexible expanded thermoplastic materials

Country Status (1)

Country Link
GB (1) GB860947A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3263927A (en) * 1964-05-19 1966-08-02 Aero Dyne Corp Method for spraying thixotropic glass bead mixtures and the like
US3801015A (en) * 1972-10-27 1974-04-02 Stoltz J Foam generator
US5785245A (en) * 1995-08-24 1998-07-28 The United States Of America As Represented By The Secretary Of Agriculture Backpack sprayer for arthropod, arthropod eggs, or arthropod egg parasitoids contained in arthropod eggs
EP4357395A1 (en) * 2022-10-21 2024-04-24 Benecke-Kaliko AG Low co2 footprint alternative propellant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3263927A (en) * 1964-05-19 1966-08-02 Aero Dyne Corp Method for spraying thixotropic glass bead mixtures and the like
US3801015A (en) * 1972-10-27 1974-04-02 Stoltz J Foam generator
US5785245A (en) * 1995-08-24 1998-07-28 The United States Of America As Represented By The Secretary Of Agriculture Backpack sprayer for arthropod, arthropod eggs, or arthropod egg parasitoids contained in arthropod eggs
EP4357395A1 (en) * 2022-10-21 2024-04-24 Benecke-Kaliko AG Low co2 footprint alternative propellant

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