GB1267671A - Improved sanitary ware - Google Patents

Improved sanitary ware

Info

Publication number
GB1267671A
GB1267671A GB47869A GB47869A GB1267671A GB 1267671 A GB1267671 A GB 1267671A GB 47869 A GB47869 A GB 47869A GB 47869 A GB47869 A GB 47869A GB 1267671 A GB1267671 A GB 1267671A
Authority
GB
United Kingdom
Prior art keywords
charge
mould
polymethyl methacrylate
injecting
thermoplastic material
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
GB47869A
Inventor
David Fairclough Oxley
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB47869A priority Critical patent/GB1267671A/en
Priority to BE744020D priority patent/BE744020A/en
Priority to FR7000084A priority patent/FR2027752A1/fr
Priority to NL7000028A priority patent/NL7000028A/xx
Priority to DE19702000159 priority patent/DE2000159A1/en
Priority to AU10076/70A priority patent/AU1007670A/en
Publication of GB1267671A publication Critical patent/GB1267671A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/0461—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by having different chemical compositions in different places, e.g. having different concentrations of foaming agent, feeding one composition after the other
    • 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
    • C08J9/34—Chemical features in the manufacture of articles consisting of a foamed macromolecular core and a macromolecular surface layer having a higher density than the core
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor

Landscapes

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

Abstract

1,267,671. Injection moulding baths &c. IMPERIAL CHEMICAL INDUSTRIES Ltd. 22 Dec., 1969 [3 Jan., 1969], No. 478/69. Heading B5A. [Also in Division A4] A process for the manufacture of an article of sanitary ware such as a bath &c. comprises injecting a charge of polymethyl methacrylate into a suitable mould and, before said charge has set, injecting a charge of thermoplastic material, e.g. a polymer or copolymer of an olefine, containing a blowing agent, preferably through the same sprue as the first charge, allowing the thermoplastic to foam and both materials to set. A second charge of polymethyl methacrylate is preferably injected after the charge of thermoplastic material. The thermoplastic material may be injected at a temperature at which foaming would normally occur but at such a speed and pressure that it is prevented, and subsequently enlarging the mould cavity to allow foaming. Suitable thermoplastics are polymers and copolymers of vinyl chloride, of methyl methacrylate, of olefines and of butadiene. Suitable blowing agents are volatile liquids such as ethyl chloride and pentane, or solids which release gases on heating such as sodium bicarbonate, azodicarbonamide, dinitrosopentamethylene tetramine, and benzene 1,3-disulphonyl hydrazide. The quantity of blowing agent is in the range 0À01- 5% by weight of the core thermoplastic. The two halves of the mould are preferably urged together after injecting the first charge of polymethyl methacrylate to ensure that it is distributed throughout the mould.
GB47869A 1969-01-03 1969-01-03 Improved sanitary ware Expired GB1267671A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB47869A GB1267671A (en) 1969-01-03 1969-01-03 Improved sanitary ware
BE744020D BE744020A (en) 1969-01-03 1970-01-02 ADVANCED SANITARY EQUIPMENT
FR7000084A FR2027752A1 (en) 1969-01-03 1970-01-02
NL7000028A NL7000028A (en) 1969-01-03 1970-01-02
DE19702000159 DE2000159A1 (en) 1969-01-03 1970-01-02 Sanitary articles and processes for their manufacture
AU10076/70A AU1007670A (en) 1969-01-03 1970-01-06 Improved sanitary ware

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB47869A GB1267671A (en) 1969-01-03 1969-01-03 Improved sanitary ware

Publications (1)

Publication Number Publication Date
GB1267671A true GB1267671A (en) 1972-03-22

Family

ID=9705060

Family Applications (1)

Application Number Title Priority Date Filing Date
GB47869A Expired GB1267671A (en) 1969-01-03 1969-01-03 Improved sanitary ware

Country Status (6)

Country Link
AU (1) AU1007670A (en)
BE (1) BE744020A (en)
DE (1) DE2000159A1 (en)
FR (1) FR2027752A1 (en)
GB (1) GB1267671A (en)
NL (1) NL7000028A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2171008A (en) * 1985-02-13 1986-08-20 Laconite Plastics Limited Baths

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4436381A1 (en) * 1994-10-12 1996-04-18 Roehm Gmbh Composites of thermoplastic layers for sanitary articles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2171008A (en) * 1985-02-13 1986-08-20 Laconite Plastics Limited Baths

Also Published As

Publication number Publication date
DE2000159A1 (en) 1970-07-23
FR2027752A1 (en) 1970-10-02
BE744020A (en) 1970-07-02
AU1007670A (en) 1971-07-08
NL7000028A (en) 1970-07-07

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