GB1187032A - Improvements relating to Microporous Flexible Sheet Materials. - Google Patents

Improvements relating to Microporous Flexible Sheet Materials.

Info

Publication number
GB1187032A
GB1187032A GB161067A GB161067A GB1187032A GB 1187032 A GB1187032 A GB 1187032A GB 161067 A GB161067 A GB 161067A GB 161067 A GB161067 A GB 161067A GB 1187032 A GB1187032 A GB 1187032A
Authority
GB
United Kingdom
Prior art keywords
solution
layer
support
sheet material
solvent
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
GB161067A
Inventor
Victor Ralph Cunningham
Thomas Stanley Dodson
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.)
Porvair PLC
Original Assignee
Porvair PLC
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 Porvair PLC filed Critical Porvair PLC
Priority to GB0609/67A priority Critical patent/GB1187040A/en
Priority to ES337628A priority patent/ES337628A1/en
Priority to JP42013796A priority patent/JPS5224081B1/ja
Priority to SE03065/67A priority patent/SE357569B/xx
Priority to NL6703587A priority patent/NL6703587A/xx
Priority to NL6703586A priority patent/NL6703586A/xx
Priority to DE19671704904 priority patent/DE1704904A1/en
Priority to CH332767A priority patent/CH509148A/en
Priority to FR97709A priority patent/FR1524197A/en
Priority to DE19671619281 priority patent/DE1619281A1/en
Priority to BE695136D priority patent/BE695136A/xx
Priority to FR97708A priority patent/FR91943E/en
Publication of GB1187032A publication Critical patent/GB1187032A/en
Priority to US37399A priority patent/US3696180A/en
Priority to US05/188,572 priority patent/US3982335A/en
Priority to US05/405,318 priority patent/US3968293A/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
    • C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
    • 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
    • C08J9/24—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by surface fusion and bonding of particles to form voids, e.g. sintering
    • 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
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes

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)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)

Abstract

1,187,032. Coating. PORVAIR Ltd. 7 March, 1967 [7 March, 1966; 11 Jan., 1967], Nos. 10528/67 and 1610/67. Divided out of 1186342. Heading B2E. [Also in Division C3] Flexible sheet material comprises strength imparting microporous, elastomeric, polyurethane material free from preformed fibrous sheet material having at least one integral fibrous surface resembling a suede leather or the flesh surface of natural leather. The sheet material is made by forming a spreadable mixture comprising a solution of a film forming plastics material in a solvent, forming a continuous layer of the mixture on a temporary support formed of sintered particles treating the layer on the support with a coagulating liquid which is a non-solvent for the polymer but is at least partially miscible with the solvent, so as to coagulate the polymer into a sheet, and washing with fresh coagulating liquid or continuing the treatment until all the solvent has been removed, drying the resultant sheet material and stripping it from the temporary support. The support may be a sheet of sintered granulated plastics material such as high density polyethylene, or may be formed by a sintered layer of granules of polymeric plastics material on a smooth metal surface. The support may be first wetted with a solution of a substance which is soluble in the coagulating liquid e.g. an aqueous solution of sodium chloride so as to be left with a coating of the substance which subsequently dissolved by the coagulating liquid e.g. water thereby facilitating the stripping of the sheet material from the support. In example 1 a layer of a solution of a polyester-based polyurethane in N,N-dimethyl formamide is doctor knife coated onto a smooth surface of a sintered high density polyethylene layer on a metal surface, and the material immersed in and washed with water at 70‹ Centigrade, dried and the layer stripped from the temporary support. The material can be used as suede leather in clothing or as a shoe upper, glove and upholstery materials. In example 2 the product of example 1 is coated with a solution of a polyurethane in dimethylcyclohexanone containing sodium chloride as removable filler, and then with a surface coating of a solution of a polyurethane in dimethyl formamide also containing sodium chloride and a pigment. The composite sheet is immersed in water at 20‹C. and then washed in water at 80‹C. before drying at 100‹C. and stripping from the temporary support. In example 3 a removable filler e.g. sodium chloride is also included in the composition for making the vapour permeable sheet material.
GB161067A 1966-03-07 1966-03-07 Improvements relating to Microporous Flexible Sheet Materials. Expired GB1187032A (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
GB0609/67A GB1187040A (en) 1966-03-07 1966-03-07 Improvements relating to Water Vapour Permeable Flexible Sheet Materials.
ES337628A ES337628A1 (en) 1966-03-07 1967-03-06 Process for preparing micro-porous polyurethane resin sheets by casting the resin on a porous sintered thermoplastic polymeric resin support surface
JP42013796A JPS5224081B1 (en) 1966-03-07 1967-03-06
SE03065/67A SE357569B (en) 1966-03-07 1967-03-06
CH332767A CH509148A (en) 1966-03-07 1967-03-07 Flexible sheet permeable to water vapor and method of preparation thereof
NL6703586A NL6703586A (en) 1966-03-07 1967-03-07
DE19671704904 DE1704904A1 (en) 1966-03-07 1967-03-07 Process for the production of a microporous, flexible synthetic leather film material
NL6703587A NL6703587A (en) 1966-03-07 1967-03-07
FR97709A FR1524197A (en) 1966-03-07 1967-03-07 Improvements in flexible sheet materials permeable to water vapor
DE19671619281 DE1619281A1 (en) 1966-03-07 1967-03-07 Water vapor permeable synthetic leather film material and process for its production
BE695136D BE695136A (en) 1966-03-07 1967-03-07
FR97708A FR91943E (en) 1966-03-07 1967-03-07 Advanced process for the production of porous materials
US37399A US3696180A (en) 1966-03-07 1970-05-11 Process for preparing micro-porous polyurethane resin sheets by casting the resin on a porous sintered thermoplastic polymeric resin support surface
US05/188,572 US3982335A (en) 1966-03-07 1971-10-12 Shoe uppers
US05/405,318 US3968293A (en) 1966-03-07 1973-10-11 Artificial leather sheet material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1052867 1966-03-07

Publications (1)

Publication Number Publication Date
GB1187032A true GB1187032A (en) 1970-04-08

Family

ID=9969487

Family Applications (1)

Application Number Title Priority Date Filing Date
GB161067A Expired GB1187032A (en) 1966-03-07 1966-03-07 Improvements relating to Microporous Flexible Sheet Materials.

Country Status (1)

Country Link
GB (1) GB1187032A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0443641A1 (en) * 1990-01-17 1991-08-28 X-Flow B.V. Method for producing a flat porous product and the use thereof in the field of pharmacy, medicine, dentistry or cosmetics

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0443641A1 (en) * 1990-01-17 1991-08-28 X-Flow B.V. Method for producing a flat porous product and the use thereof in the field of pharmacy, medicine, dentistry or cosmetics
US5169575A (en) * 1990-01-17 1992-12-08 X-Flow B.V. Method for producing a flat porous product

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees