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WO2000040395A1 - Procede et moule de moulage de lentilles de contact - Google Patents

Procede et moule de moulage de lentilles de contact Download PDF

Info

Publication number
WO2000040395A1
WO2000040395A1 PCT/US1999/024436 US9924436W WO0040395A1 WO 2000040395 A1 WO2000040395 A1 WO 2000040395A1 US 9924436 W US9924436 W US 9924436W WO 0040395 A1 WO0040395 A1 WO 0040395A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
posterior
lens
anterior
radiation
Prior art date
Application number
PCT/US1999/024436
Other languages
English (en)
Inventor
Dominic V. Ruscio
Graham W. Biddle
Original Assignee
Bausch & Lomb Incorporated
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 Bausch & Lomb Incorporated filed Critical Bausch & Lomb Incorporated
Priority to AU11242/00A priority Critical patent/AU1124200A/en
Publication of WO2000040395A1 publication Critical patent/WO2000040395A1/fr

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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/40—Plastics, e.g. foam or rubber
    • 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
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0888—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using transparant moulds
    • 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
    • B29K2827/00—Use of polyvinylhalogenides or derivatives thereof as mould material
    • B29K2827/06—PVC, i.e. polyvinylchloride

Definitions

  • the rotation of the mold can be controlled so that a desired posterior lens surface is formed.
  • an excess of monomeric mixture can be charged to the mold, and following curing of the lens-shaped article, a desired posterior lens surface can be lathe cut from the spuncast article.
  • the rotating mold is open from above, with UV radiation being directed to the monomeric mixture from above.
  • the invention relates to a method for molding contact lenses in a mold assembly comprising a posterior mold including a molding surface for defining a posterior contact lens surface and an anterior mold including a molding surface for defining an anterior contact lens surface.
  • a monomeric mixture is charged to the mold cavity between the molding surfaces of the posterior and anterior molds, and this monomeric mixture is subjected to radiation while retained in the mold cavity to form a lens.
  • One of the anterior and posterior molds is made of polyvinyl chloride free of UV absorbers, and radiation is directed through the mold made of polyvinyl chloride to the monomeric mixture in the mold cavity.
  • a test was developed to determine the tackiness or self-adherence of the posterior side of the contact lens to the molding surface of the posterior mold.
  • the lens is folded in half so that the posterior lens surface lies upon itself.
  • the folded lens is then placed between a pair of glass cover slips.
  • a weight is placed on top of the cover slip, leaving a portion of the folded edges outside the cover slips for attachment.
  • the weight is applied for 2 minutes.
  • the lens is removed from the cover slips and cut into a strip leaving the 2 mm free edge section at the end of the strip.
  • the free edge sections are taped with Teflon tape and clamped into the Instron Tensile Tester grips with one taped edge on the upper grip and the other taped edge on the lower grip.

Landscapes

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

Abstract

Un procédé de moulage de lentilles de contact dans un moule en polychlorure de vinyle ne présentant pas d'agents anti-UV produit une surface de lentille améliorée.
PCT/US1999/024436 1998-12-30 1999-10-18 Procede et moule de moulage de lentilles de contact WO2000040395A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU11242/00A AU1124200A (en) 1998-12-30 1999-10-18 Method and mold for casting contact lenses

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11436698P 1998-12-30 1998-12-30
US60/114,366 1998-12-30

Publications (1)

Publication Number Publication Date
WO2000040395A1 true WO2000040395A1 (fr) 2000-07-13

Family

ID=22354796

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/024436 WO2000040395A1 (fr) 1998-12-30 1999-10-18 Procede et moule de moulage de lentilles de contact

Country Status (2)

Country Link
AU (1) AU1124200A (fr)
WO (1) WO2000040395A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004054772A1 (fr) * 2002-12-17 2004-07-01 Novartis Ag Systeme et procede de durcissement d'objets moules polymeres
US7387759B2 (en) 2002-12-17 2008-06-17 Novartis Ag System and method for curing polymeric moldings having a masking collar

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4614624A (en) * 1985-03-12 1986-09-30 Neefe Charles W Method of molding bifocal lenses
EP0347043A2 (fr) * 1988-05-17 1989-12-20 Pilkington Visioncare Inc. (a Delaware corp.) Lentilles de contact et procédé et dispositif pour leur production
EP0359539A2 (fr) * 1988-09-14 1990-03-21 Allergan, Inc Lentille compound moulée par rotation et procédé de fabrication
US5271875A (en) * 1991-09-12 1993-12-21 Bausch & Lomb Incorporated Method for molding lenses
EP0635347A1 (fr) * 1993-07-21 1995-01-25 Ciba-Geigy Ag Moule pour les lentilles
US5681510A (en) * 1994-10-13 1997-10-28 Bausch & Lomb Incorporated Method for treating plastic mold pieces
EP0876900A1 (fr) * 1997-03-31 1998-11-11 JOHNSON & JOHNSON VISION PRODUCTS, INC. Procédé pour la fabrication de conceptions complexes, optiques pour les lentilles de contact

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4614624A (en) * 1985-03-12 1986-09-30 Neefe Charles W Method of molding bifocal lenses
EP0347043A2 (fr) * 1988-05-17 1989-12-20 Pilkington Visioncare Inc. (a Delaware corp.) Lentilles de contact et procédé et dispositif pour leur production
EP0359539A2 (fr) * 1988-09-14 1990-03-21 Allergan, Inc Lentille compound moulée par rotation et procédé de fabrication
US5271875A (en) * 1991-09-12 1993-12-21 Bausch & Lomb Incorporated Method for molding lenses
EP0635347A1 (fr) * 1993-07-21 1995-01-25 Ciba-Geigy Ag Moule pour les lentilles
US5681510A (en) * 1994-10-13 1997-10-28 Bausch & Lomb Incorporated Method for treating plastic mold pieces
EP0876900A1 (fr) * 1997-03-31 1998-11-11 JOHNSON & JOHNSON VISION PRODUCTS, INC. Procédé pour la fabrication de conceptions complexes, optiques pour les lentilles de contact

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004054772A1 (fr) * 2002-12-17 2004-07-01 Novartis Ag Systeme et procede de durcissement d'objets moules polymeres
US7384590B2 (en) 2002-12-17 2008-06-10 Novartis Ag System and method for curing polymeric moldings
US7387759B2 (en) 2002-12-17 2008-06-17 Novartis Ag System and method for curing polymeric moldings having a masking collar

Also Published As

Publication number Publication date
AU1124200A (en) 2000-07-24

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