GB1111928A - A process for the production of foamed polypropylene,and articles produced therefrom - Google Patents

A process for the production of foamed polypropylene,and articles produced therefrom

Info

Publication number
GB1111928A
GB1111928A GB50905/66A GB5090566A GB1111928A GB 1111928 A GB1111928 A GB 1111928A GB 50905/66 A GB50905/66 A GB 50905/66A GB 5090566 A GB5090566 A GB 5090566A GB 1111928 A GB1111928 A GB 1111928A
Authority
GB
United Kingdom
Prior art keywords
extruder
foam
foamed polypropylene
foaming agent
point
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
GB50905/66A
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of GB1111928A publication Critical patent/GB1111928A/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
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
    • C08J9/141—Hydrocarbons
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0229—Filter rod forming processes
    • A24D3/0237—Filter rod forming processes by extrusion
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1669—Cellular material
    • B01D39/1676—Cellular material of synthetic origin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/50—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • 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
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

Foamed polypropylene is prepared by feeding polypropylene and a nucleating agent containing a CO2-liberating component and an acid to the transport zone of an extruder, injecting and mixing a liquid organic foaming agent into the plastic mass in the extruder and extruding the mixture with formation of foam the pressure in the extruder at the point where the foaming agent is injected being at least 100% higher than the pressure at the end of the transport zone, i.e. at the point where the flow passage in the extruder is first restricted. The nucleating agent is preferably made up of 0.5% by weight of the feed of sodium bicarbonate and 0.4% citric acid. The foaming agent is preferably isopentane or butane: and the extrusion temperature is preferably close to the melting point of the polymer. A cigarette filter may be made of the foamed polypropylene.ALSO:Cigarette filters are made from foamed polypropylene by cutting extruded strands of the foam into short lengths. The foam has a continuous or substantially closed skin and a low resistance to passage of gases in the longitudinal direction, and the volume of open cells in the foam should be at least 60% of the total filter volume the density being between 10 and 50 gms per litre.
GB50905/66A 1965-11-16 1966-11-14 A process for the production of foamed polypropylene,and articles produced therefrom Expired GB1111928A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL6514912A NL6514912A (en) 1965-11-16 1965-11-16
NL6514911A NL6514911A (en) 1965-11-16 1965-11-16

Publications (1)

Publication Number Publication Date
GB1111928A true GB1111928A (en) 1968-05-01

Family

ID=26643962

Family Applications (1)

Application Number Title Priority Date Filing Date
GB50905/66A Expired GB1111928A (en) 1965-11-16 1966-11-14 A process for the production of foamed polypropylene,and articles produced therefrom

Country Status (6)

Country Link
BE (1) BE689655A (en)
DK (1) DK113957B (en)
FR (1) FR1499016A (en)
GB (1) GB1111928A (en)
NL (2) NL6514911A (en)
SE (1) SE340168B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939849A (en) * 1970-11-18 1976-02-24 Monsanto Chemicals Limited Filter elements
DE102012219409A1 (en) 2012-10-24 2014-04-24 Neenah Gessner Gmbh Filter material with increased life and this filter material containing filter element
DE102012220546A1 (en) 2012-11-12 2014-05-15 Neenah Gessner Gmbh Flame retardant gas filter material with high dust storage capacity
CN105249518A (en) * 2015-09-25 2016-01-20 安徽中烟工业有限责任公司 Porous tobacco material for heating non-combustion type cigarettes and preparation method of porous tobacco material
WO2016020039A1 (en) 2014-08-05 2016-02-11 Neenah Gessner Gmbh Filter material and filter material combination for separating liquids and filter elements produced therefrom
DE102015122746A1 (en) 2015-12-23 2017-06-29 Neenah Gessner Gmbh Filter material and filter element made therefrom
CZ306882B6 (en) * 2015-12-07 2017-08-23 Technická Univerzita V Liberci, Katedra Strojírenské Technologie, Oddělení Tváření Kovů A Zpracování Plastů A polymer composite with natural fibres and a light-weight matrix
EP3718620A1 (en) 2019-04-01 2020-10-07 Neenah Gessner GmbH Filter medium with printed polymer pattern

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE502004003664D1 (en) 2003-09-03 2007-06-14 Hauni Maschinenbau Ag Method and device for producing a filter strand
EP1512336B1 (en) * 2003-09-03 2007-05-02 Hauni Maschinbau AG Method and apparatus for manufacturing a filter rod

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939849A (en) * 1970-11-18 1976-02-24 Monsanto Chemicals Limited Filter elements
DE102012219409A1 (en) 2012-10-24 2014-04-24 Neenah Gessner Gmbh Filter material with increased life and this filter material containing filter element
DE102012220546A1 (en) 2012-11-12 2014-05-15 Neenah Gessner Gmbh Flame retardant gas filter material with high dust storage capacity
US10293290B2 (en) 2012-11-12 2019-05-21 Neenah Gessner Gmbh Flame-retardant gas filter material having high dust storage capacity
WO2016020039A1 (en) 2014-08-05 2016-02-11 Neenah Gessner Gmbh Filter material and filter material combination for separating liquids and filter elements produced therefrom
CN105249518A (en) * 2015-09-25 2016-01-20 安徽中烟工业有限责任公司 Porous tobacco material for heating non-combustion type cigarettes and preparation method of porous tobacco material
CN105249518B (en) * 2015-09-25 2017-10-03 安徽中烟工业有限责任公司 A kind of preparation method for heating the porous tobacco-containing material of non-combustion-type cigarette
CZ306882B6 (en) * 2015-12-07 2017-08-23 Technická Univerzita V Liberci, Katedra Strojírenské Technologie, Oddělení Tváření Kovů A Zpracování Plastů A polymer composite with natural fibres and a light-weight matrix
DE102015122746A1 (en) 2015-12-23 2017-06-29 Neenah Gessner Gmbh Filter material and filter element made therefrom
US11198079B2 (en) 2015-12-23 2021-12-14 Neenah Gessner Gmbh Filter material and filter element produced therefrom
EP3718620A1 (en) 2019-04-01 2020-10-07 Neenah Gessner GmbH Filter medium with printed polymer pattern
WO2020200878A1 (en) 2019-04-01 2020-10-08 Neenah Gessner Gmbh Filter medium with printed polymer pattern

Also Published As

Publication number Publication date
BE689655A (en) 1967-05-16
NL6514911A (en) 1967-05-17
SE340168B (en) 1971-11-08
NL6514912A (en) 1967-05-17
FR1499016A (en) 1967-10-20
DK113957B (en) 1969-05-12

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