JPS5443268A - Production of soft contact lens - Google Patents

Production of soft contact lens

Info

Publication number
JPS5443268A
JPS5443268A JP10892577A JP10892577A JPS5443268A JP S5443268 A JPS5443268 A JP S5443268A JP 10892577 A JP10892577 A JP 10892577A JP 10892577 A JP10892577 A JP 10892577A JP S5443268 A JPS5443268 A JP S5443268A
Authority
JP
Japan
Prior art keywords
molds
lens
stock solution
water
mold
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.)
Granted
Application number
JP10892577A
Other languages
Japanese (ja)
Other versions
JPS5923271B2 (en
Inventor
Shinzo Osumi
Hidenori Gonjo
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.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
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 Toray Industries Inc filed Critical Toray Industries Inc
Priority to JP10892577A priority Critical patent/JPS5923271B2/en
Priority to DE19782839249 priority patent/DE2839249A1/en
Priority to FR7825968A priority patent/FR2402525A1/en
Priority to AU39748/78A priority patent/AU530070B2/en
Priority to GB7836391A priority patent/GB2006091B/en
Publication of JPS5443268A publication Critical patent/JPS5443268A/en
Priority to US06/190,820 priority patent/US4347198A/en
Priority to CA000412101A priority patent/CA1149563A/en
Priority to US06/517,567 priority patent/US4699934A/en
Publication of JPS5923271B2 publication Critical patent/JPS5923271B2/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
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00038—Production of contact lenses
    • B29D11/00125—Auxiliary operations, e.g. removing oxygen from the mould, conveying moulds from a storage to the production line in an inert atmosphere

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Eyeglasses (AREA)

Abstract

PURPOSE:To reduce quality dispersion and obtain a high-quality soft contact lens usable continuously, by heating a stock solution uniformly filled between a concave and a convex molds to form a lens having a constant tensile strength, and by extracting the lens released from the molds with water. CONSTITUTION:About more than five times excess amount of a stock solution than required is introduced into the concave mold 1, on which the convex mold 2 is put to overflow and fill the stock solution uniformly between the two molds 1 and 2. At least one of the molds has an interference face, for instance a pair of molds consisting of the concave mold 1 with an interference face and the convex mold 2 without it. The resulting material is heated to form a lens having a tensile strength >=0.1kgf/cm<2> and the lens, a solvent-containing gel, in immersed in water to be released from the molds. The solvent in the gel is then replaced by water, and the lens is adjusted to make its visible light transmission of not less than 90% per 0.1 mm. thickness. N-vinyl-pyrrolidone, methyl methacrylate, dimethylsufoxide solution, etc. may be preferably cited as the stock solution.
JP10892577A 1977-09-12 1977-09-12 How to manufacture soft contact lenses Expired JPS5923271B2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP10892577A JPS5923271B2 (en) 1977-09-12 1977-09-12 How to manufacture soft contact lenses
DE19782839249 DE2839249A1 (en) 1977-09-12 1978-09-08 METHOD OF MANUFACTURING A SOFT CONTACT LENS AND OUTPUT SOLUTION FOR CARRYING OUT THE METHOD
FR7825968A FR2402525A1 (en) 1977-09-12 1978-09-08 PROCESS FOR MANUFACTURING COMPOSITIONS OF SOFT CONTACT LENSES AND NEW PRODUCTS THUS OBTAINED
AU39748/78A AU530070B2 (en) 1977-09-12 1978-09-11 Moulding soft contact lens from solution
GB7836391A GB2006091B (en) 1977-09-12 1978-09-11 Process and composition for making soft contact lenses
US06/190,820 US4347198A (en) 1977-09-12 1980-09-25 Producing soft contact lenses
CA000412101A CA1149563A (en) 1977-09-12 1982-09-23 Soft contact lens composition and method
US06/517,567 US4699934A (en) 1977-09-12 1983-07-28 Soft contact composition and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10892577A JPS5923271B2 (en) 1977-09-12 1977-09-12 How to manufacture soft contact lenses

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP1647285A Division JPS60185924A (en) 1985-02-01 1985-02-01 Water containing soft contact lens

Publications (2)

Publication Number Publication Date
JPS5443268A true JPS5443268A (en) 1979-04-05
JPS5923271B2 JPS5923271B2 (en) 1984-05-31

Family

ID=14497121

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10892577A Expired JPS5923271B2 (en) 1977-09-12 1977-09-12 How to manufacture soft contact lenses

Country Status (1)

Country Link
JP (1) JPS5923271B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5519825U (en) * 1978-07-24 1980-02-07
JPS606710A (en) * 1983-06-27 1985-01-14 Toray Ind Inc Production of hydrogel molding
JPH10513410A (en) * 1995-02-03 1998-12-22 ノバルティス アクチエンゲゼルシャフト Crosslinked polymer containing salt structure

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5519825U (en) * 1978-07-24 1980-02-07
JPS606710A (en) * 1983-06-27 1985-01-14 Toray Ind Inc Production of hydrogel molding
JPH0261970B2 (en) * 1983-06-27 1990-12-21 Toray Industries
JPH10513410A (en) * 1995-02-03 1998-12-22 ノバルティス アクチエンゲゼルシャフト Crosslinked polymer containing salt structure

Also Published As

Publication number Publication date
JPS5923271B2 (en) 1984-05-31

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