WO2008093421A1 - Process for producing contact lens - Google Patents

Process for producing contact lens Download PDF

Info

Publication number
WO2008093421A1
WO2008093421A1 PCT/JP2007/051682 JP2007051682W WO2008093421A1 WO 2008093421 A1 WO2008093421 A1 WO 2008093421A1 JP 2007051682 W JP2007051682 W JP 2007051682W WO 2008093421 A1 WO2008093421 A1 WO 2008093421A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact lens
molding die
molding
central axis
rotation
Prior art date
Application number
PCT/JP2007/051682
Other languages
French (fr)
Japanese (ja)
Inventor
Takeshi Sugiyama
Masahiro Matsumoto
Katsuhiro Iwai
Original Assignee
Menicon Co., 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 Menicon Co., Ltd. filed Critical Menicon Co., Ltd.
Priority to PCT/JP2007/051682 priority Critical patent/WO2008093421A1/en
Priority to JP2008555990A priority patent/JP4787884B2/en
Publication of WO2008093421A1 publication Critical patent/WO2008093421A1/en

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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
    • 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
    • B29D11/00115—Production of contact lenses made by rotational casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/06—Making preforms by moulding the material
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
    • B29C41/042—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould by rotating a mould around its axis of symmetry
    • B29C41/047—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould by rotating a mould around its axis of symmetry the mould cavity lying totally outside the axis, e.g. toroidal moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0016—Lenses
    • B29L2011/0041—Contact lenses

Landscapes

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

Abstract

A process for producing a contact lens, in which not only can reduction of production cost be attained but also a lens blank with excellent shape stability can be obtained. Polymerizable material (32) is injected in the state of having free surface (64) into molding cavity (30) of molding die (18). Thereafter, polymerization molding of lens blank (66) is carried out while, with bottom face (26) of the molding die (18) directed to the outside with respect to central axis of rotation (49) extending in the vertical direction, rotating the molding die (18) around the central axis of rotation (49).
PCT/JP2007/051682 2007-02-01 2007-02-01 Process for producing contact lens WO2008093421A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2007/051682 WO2008093421A1 (en) 2007-02-01 2007-02-01 Process for producing contact lens
JP2008555990A JP4787884B2 (en) 2007-02-01 2007-02-01 Contact lens manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/051682 WO2008093421A1 (en) 2007-02-01 2007-02-01 Process for producing contact lens

Publications (1)

Publication Number Publication Date
WO2008093421A1 true WO2008093421A1 (en) 2008-08-07

Family

ID=39673741

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/051682 WO2008093421A1 (en) 2007-02-01 2007-02-01 Process for producing contact lens

Country Status (2)

Country Link
JP (1) JP4787884B2 (en)
WO (1) WO2008093421A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023120606A1 (en) * 2021-12-24 2023-06-29 三井化学株式会社 Method for manufacturing optical member and cured product

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62111707A (en) * 1985-11-11 1987-05-22 Fuji Rubber Kk Manufacture of illumination display part
JP2000343539A (en) * 1999-06-08 2000-12-12 Menicon Co Ltd Mold for molding multi-material contact lens blank and preparation of multi-material contact lens blank
JP2006171270A (en) * 2004-12-15 2006-06-29 Hoya Corp Manufacturing method for contact lens

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62111707A (en) * 1985-11-11 1987-05-22 Fuji Rubber Kk Manufacture of illumination display part
JP2000343539A (en) * 1999-06-08 2000-12-12 Menicon Co Ltd Mold for molding multi-material contact lens blank and preparation of multi-material contact lens blank
JP2006171270A (en) * 2004-12-15 2006-06-29 Hoya Corp Manufacturing method for contact lens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023120606A1 (en) * 2021-12-24 2023-06-29 三井化学株式会社 Method for manufacturing optical member and cured product

Also Published As

Publication number Publication date
JP4787884B2 (en) 2011-10-05
JPWO2008093421A1 (en) 2010-05-20

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