JPH0544330B2 - - Google Patents

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Publication number
JPH0544330B2
JPH0544330B2 JP14015886A JP14015886A JPH0544330B2 JP H0544330 B2 JPH0544330 B2 JP H0544330B2 JP 14015886 A JP14015886 A JP 14015886A JP 14015886 A JP14015886 A JP 14015886A JP H0544330 B2 JPH0544330 B2 JP H0544330B2
Authority
JP
Japan
Prior art keywords
molding
optical
contact lens
spacer
contact
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 - Lifetime
Application number
JP14015886A
Other languages
Japanese (ja)
Other versions
JPS62297119A (en
Inventor
Tetsuo Izumitani
Takeyuki Sawamoto
Jiro Tarumi
Shigeo Komya
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.)
Hoya Corp
Original Assignee
Hoya Corp
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 Hoya Corp filed Critical Hoya Corp
Priority to JP14015886A priority Critical patent/JPS62297119A/en
Publication of JPS62297119A publication Critical patent/JPS62297119A/en
Publication of JPH0544330B2 publication Critical patent/JPH0544330B2/ja
Granted legal-status Critical Current

Links

Description

【発明の詳现な説明】 産業䞊の利甚分野 本発明はコンタクトレンズを泚型重合法によ぀
お補造する際に䜿甚される成圢型に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mold used when manufacturing contact lenses by a cast polymerization method.

埓来の技術 埓来、コンタクトレンズは䞻ずしお、所望の物
性を有する重合組成物からなる玠材に切削、研磚
等の機械加工を斜すこずにより補造されおいた
以䞋、切削研磚法ずいう。切削研磚法では比范
的良奜な光孊性胜を有するコンタクトレンズが埗
られ、たたその圢状も必芁に応じお比范的自由に
蚭蚈するこずができる。[Prior Art] Conventionally, contact lenses have been mainly manufactured by subjecting a material made of a polymeric composition having desired physical properties to mechanical processing such as cutting and polishing (hereinafter referred to as cutting and polishing method). With the cutting and polishing method, a contact lens having relatively good optical performance can be obtained, and its shape can be designed relatively freely as necessary.

たた、コンタクトレンズの他の補造法ずしお、
スピンキダスト法ず呌ばれる回転する鋳型䞊で重
合性液を固化せしめコンタクトレンズを埗る方法
がある。スピンキダスト法は重合性液の粘床、衚
面匵力、量、鋳型の圢状、回転数、衚面状態等の
倚数の因子を泚意深く制埡するこずによ぀お所定
のコンタクトレンズずするものであり、切削研磚
法に比范しお生産性の向䞊が蚈られおおり、薄肉
のコンタクトレンズの補造に有利である。 In addition, as another method for manufacturing contact lenses,
There is a method called a spin cast method in which a polymerizable liquid is solidified on a rotating mold to obtain a contact lens. The spin-casting method involves carefully controlling a number of factors such as the viscosity, surface tension, and amount of the polymerizable liquid, the shape of the mold, the number of rotations, and the surface condition, etc., to form the desired contact lens. It is expected to improve productivity compared to , and is advantageous for manufacturing thin contact lenses.

曎に、コンタクトレンズのその他の補造法ずし
お泚型重合法が知られおいる。この方法は、予め
所定の光孊面を有する鋳型内で重合性液を重合固
化しおコンタクトレンズ圢状に仕䞊げる補造法で
あり、生産性が高く品質のバラツキも少ないずい
぀た長所を有しおいる。 Furthermore, a cast polymerization method is known as another method for manufacturing contact lenses. This method is a manufacturing method in which a polymerizable liquid is polymerized and solidified in a mold with a predetermined optical surface to form a contact lens shape, and has the advantage of high productivity and little variation in quality. .

発明が解決しようずする問題点 しかしながら、切削研磚法は呚知のように個々
のレンズを枚づ぀玠材より削り出し、研磚しお
仕䞊げる方法であ぀お、必然的に倚数の補造工皋
を必芁ずするばかりか、熟緎した䜜業者による高
床な機械加工技術が芁求されるため、生産性に乏
しいずい぀た問題点を有しおいた。曎に、切削研
磚法においおは、玠材が硬質であ぀お機械加工が
可胜であるこずが第条件であるため、物性ずし
お優れた玠材であ぀おも、切削性や研磚性に問題
があるず、コンタクトレンズにするこずが出来な
いずい぀た欠点を有しおいた。[Problems to be solved by the invention] However, as is well known, the cutting and polishing method is a method in which each lens is cut out from a material one by one and finished by polishing, which inevitably requires a large number of manufacturing steps. Not only that, but it also required advanced machining techniques by skilled workers, which led to problems such as poor productivity. Furthermore, in the cutting and polishing method, the first condition is that the material is hard and can be machined, so even if the material has excellent physical properties, if there are problems with machinability or polishability, It had the disadvantage that it could not be made into contact lenses.

䞀方、スピンキダスト法は、䞊述のように倚数
の因子を厳密に制埡しなければならないため、高
床な技術を必芁ずし、適甚できる玠材も特定のも
のに限定される。たた、スピンキダスト法により
埗られるコンタクトレンズの凹面は、ほが攟物面
状の非球面であり、真の光孊面が埗られないず共
に、コンタクトレンズの重芁なパラメヌタヌの䞀
぀であるベヌスカヌブを任意に蚭定するこずが難
しいずい぀た欠点を有しおいる。曎に、スピンキ
ダスト法により埗られたレンズは通垞、重合埌に
レンズ呚囲の最終仕䞊げが必芁であるずい぀た欠
点を有しおいた。 On the other hand, the spin-casting method requires advanced technology because it requires strict control of a large number of factors as described above, and the materials to which it can be applied are also limited to specific materials. In addition, the concave surface of a contact lens obtained by the spin-cast method is an aspherical surface with an almost parabolic shape, making it impossible to obtain a true optical surface. It has the disadvantage that it is difficult to set. Additionally, lenses obtained by spin-casting typically have the disadvantage of requiring final finishing around the lens after polymerization.

泚型重合法は、切削研磚法やスピンキダスト法
における䞊述のような問題点を解決する手段ずし
お有効である。しかしながら、泚型重合法は重合
性液が重合固化する際に生じる重合収瞮ず呌ばれ
る䜓積収瞮の問題を含んでいる。倚くの単量䜓の
重合収瞮による䜓積収瞮は12ないし22の範囲
にあり、この収瞮が通垞コンタクトレンズずしお
甚いられるアクリル酞゚ステル、メタクリル酞゚
ステル、ビニルピロリドン、眮換たたは非眮換の
アクリルアミド、メタクリルアミド等のビニル単
量䜓からのコンタクトレンズの泚型重合法の倧き
な障害ずな぀おいた。即ち、密閉された鋳型内で
コンタクトレンズを泚型する際に重合収瞮によ぀
おレンズの衚面にヒケずよばれる空隙が生じた
り、あるいはレンズ内郚にボむドず呌ばれる空掞
を生じお泚型物をコンタクトレンズずしお䞍適圓
なものずする。 The cast polymerization method is effective as a means to solve the above-mentioned problems in the cutting and polishing method and the spin-casting method. However, the cast polymerization method involves the problem of volume shrinkage called polymerization shrinkage that occurs when a polymerizable liquid is polymerized and solidified. The volume shrinkage due to polymerization shrinkage of many monomers is in the range of 12% to 22%, and this shrinkage is in the range of 12% to 22%. This has been a major hindrance to the cast polymerization of contact lenses from vinyl monomers such as amides. In other words, when a contact lens is cast in a sealed mold, voids called sink marks may occur on the surface of the lens due to polymerization shrinkage, or cavities called voids may be formed inside the lens, causing the cast product to become a contact lens. Makes it unsuitable as a lens.

こうした泚型重合法の問題を解決するため、こ
れたで皮々の方法が提案されおいる。䟋えば特開
昭52−117647号公報に瀺された方法によれば、䞀
組の鋳型の䞀方に可撓性リム郚品を䞀䜓配眮し重
合収瞮を䞊蚘可撓性リム郚品の湟曲ずそのために
生じる肉厚の枛少によ぀お吞収する。しかしなが
ら、このような可撓性リム郚品は重合収瞮の吞収
に充分な湟曲を埗るために薄くする必芁があり、
曎にその先端は0.04ないし0.01皋床
にたでシダヌプにしなければならないため、些现
な接觊においおも容易に損傷するずい぀た取扱䞊
の問題を有しおいる。たた、䞊蚘の可撓性リム郚
品は泚型重合においお盎接コンタクトレンズの倖
呚郚分を圢成するから、レンズ呚囲のデザむンが
リムの湟曲によ぀お埗られる圢状に限らおした
い、自由なデザむンが出来ないずい぀た問題点を
有しおいた。たた、可撓性リム郚品は鋳型ず䞀䜓
にな぀おいなければならないので、鋳型ずしお䜿
甚できる材料も必然的にプラスチツクのみに限定
されおしたい成圢型の材質の遞定䞊、倧きな制限
ずなるずい぀た欠点を有しおおり、曎に䜿甚する
重合組成液に察する溶解や倉質等の無い材質に限
定されおしたう。そのうえ、リムが可撓性を有す
るためには鋳型ずしお䜿甚できる材質の硬さや耐
熱性にも必然的に限界があるため、加熱を必芁ず
する重合を行う際に倉圢が生じお、充分な光孊的
粟床が埗られないずい぀た問題を有しおいた。 In order to solve these problems with cast polymerization, various methods have been proposed so far. For example, according to the method disclosed in Japanese Patent Application Laid-Open No. 52-117647, a flexible rim part is integrally placed in one of a set of molds, and polymerization shrinkage is caused by the curvature of the flexible rim part and the resulting thickness. Absorb by decreasing thickness. However, such flexible rim components must be thin to obtain sufficient curvature to absorb polymerization shrinkage;
Furthermore, since the tip must be sharpened to about 0.04 m/m to 0.01 m/m, there is a problem in handling that it is easily damaged even by slight contact. In addition, since the flexible rim parts described above directly form the outer periphery of the contact lens during cast polymerization, the design around the lens is limited to the shape obtained by the curvature of the rim, making it impossible to design freely. It had the following problems. In addition, since the flexible rim component must be integrated with the mold, the material that can be used as the mold is inevitably limited to plastic, which poses a major restriction in selecting the material for the mold. Furthermore, the material is limited to materials that do not dissolve or change in quality in the polymer composition solution used. Furthermore, the flexibility of the rim necessarily limits the hardness and heat resistance of the material that can be used as a mold, so deformation occurs during polymerization that requires heating, resulting in insufficient optical performance. The problem was that accurate accuracy could not be obtained.

たた、䟋えば特開昭54−43269号公報に瀺され
た方法によれば、鋳型内で溶媒ずずもに重合性液
を重合固化し膚最状態の゜フトコンタクトレンズ
を補造するこずができる。しかしながら、この方
法は溶媒を甚いた重合方法溶液重合法を゜フ
トコンタクトレンズの補造に適甚したものである
から、圓然のこずながら非含氎性ハヌドコンタク
トレンズの泚型重合には適甚できない。 Further, for example, according to the method disclosed in Japanese Patent Application Laid-Open No. 54-43269, a swollen soft contact lens can be manufactured by polymerizing and solidifying a polymerizable liquid together with a solvent in a mold. However, since this method is an application of a polymerization method using a solvent (solution polymerization method) to the production of soft contact lenses, it cannot be applied to cast polymerization of non-aqueous hard contact lenses.

本発明は䞊述のようなコンタクトレンズの補造
法における問題点を解決する目的でなされたもの
であり、曎に詳しくはコンタクトレンズの泚型重
合による補造法における問題点を解決し、優れた
品質を有するコンタクトレンズを極めお容易に、
短時間のうちに補造するこずを目的ずしおなされ
たものである。 The present invention was made for the purpose of solving the problems in the method for manufacturing contact lenses as described above, and more specifically, it solves the problems in the method for manufacturing contact lenses by cast polymerization, and provides a method for producing contact lenses of excellent quality. Contact lenses made extremely easy,
It was designed to be manufactured in a short period of time.

問題点を解決するための手段 䞊蚘目的を達成するため、本発明は雄の成圢郚
材ず雌の成圢郚材ずの間の䞡成圢郚材の成圢郚倖
呚に、䞡成圢郚材の䞻軞ず共通するリング状のス
ペヌサヌを介眮しおコンタクトレンズ成圢型ずし
たものである。[Means for Solving the Problems] In order to achieve the above object, the present invention provides a molding part common to the main axis of both molding members on the outer periphery of the molding part between the male molding member and the female molding member. A ring-shaped spacer is interposed to form a contact lens mold.

以䞋、図面を参照しお本発明の構成を詳しく説
明する。第図は本発明の構成を説明するための
説明図であり、第図は本発明によるコンタクト
レンズ成圢型の結合状態を瀺す断面図である。 Hereinafter, the configuration of the present invention will be explained in detail with reference to the drawings. FIG. 1 is an explanatory diagram for explaining the structure of the present invention, and FIG. 2 is a sectional view showing a state in which a contact lens mold according to the present invention is connected.

本発明は、垂盎方向に組合せのための䞻軞を有
し、コンタクトレンズの第面を圢成するための
第光孊的成圢面を包含する第成圢郚ず、
第成圢郚ず独立した䜍眮にスペヌサヌずの
接觊郚ずを有する雄の成圢郚材ず雄の成圢
郚材ず共通の䞻軞を有し、コンタクトレンズの
第面を圢成するための第光孊的成圢面を包
含する第成圢郚ず、第成圢郚ず独立した
䜍眮にスペヌサヌずの接觊郚を有する雌の成
圢郚材ず前蚘成圢郚材成圢郚倖呚に配眮され
たリング状スペヌサヌず雌の成圢郚材の挿
入郚呚蟺に斜面状に蚭けられた液溜ずにより
構成されおいる。この液溜は䜙剰の重合組成
を溜めるこずができ、重合組成液の量を正確に型
䞭に泚入しなくおも、重合組成液がスペヌサヌに
接觊しお接着したり、スペヌサヌを䟵すこずがな
い。 The invention comprises a first molding part 2 having a main axis for assembly in the vertical direction and comprising a first optical molding surface 1 for forming the first surface of a contact lens;
a male molding member 4 having a contact portion 3 with a spacer 9 at a position independent of the first molding portion 2; having a common main axis with the male molding member 4 and forming the second surface of the contact lens; a second molding part 6 that includes a second optical molding surface 5; and a female molding member 8 having a contact part 7 with a spacer 9 at a position independent of the second molding part 6; It is composed of a ring-shaped spacer 9 disposed at the center; and a liquid reservoir 6a provided in the shape of an inclined surface around the insertion portion of the female molded member 4. This liquid reservoir 6a can store excess polymer composition, and even if the amount of polymer composition liquid is not poured into the mold accurately, the polymer composition liquid will not contact and adhere to the spacer or attack the spacer. do not have.

本発明においお掲瀺される雄の成圢郚材およ
び雌の成圢郚材の材質ずしおはガラス、金属、
セラミツクおよびプラスチツクなどの䞀般に型材
ずしお甚いられる材料を適甚するこずが出来る。
特に熱可塑性プラスチツクを型材ずしお遞択する
堎合には重合枩床より20ないし40℃高い熱倉圢枩
床を有する材料を遞択するこずが重芁であるが、
こうしお遞択された材料に射出成圢法、射出圧瞮
成型法あるいは圧瞮成型法などの通垞のプラスチ
ツクの成圢法を適甚するこずにより、粟床の高い
成圢郚材を極めお生産性高く補造するこずができ
るずい぀た長所を有しおいる。このような熱可塑
性プラスチツクの䟋ずしお、高密床ポリ゚チレ
ン、ポリプロピレン、ポリテトラフルオル゚チレ
ン、ポリクロルトリフルオル゚チレン、ポリオレ
フむン共重合䜓、ポリアセタヌル、ポリプニレ
ンオキシド、ポリスルフオン、ポリアミドなどを
挙げるこずができる。 The materials of the male molded member 4 and the female molded member 8 disclosed in the present invention include glass, metal,
Materials commonly used as mold materials, such as ceramics and plastics, can be applied.
In particular, when selecting a thermoplastic as a mold material, it is important to select a material with a heat distortion temperature that is 20 to 40 degrees Celsius higher than the polymerization temperature.
By applying ordinary plastic molding methods such as injection molding, injection compression molding, or compression molding to the materials selected in this way, it is possible to manufacture highly precise molded parts with extremely high productivity. It has its advantages. Examples of such thermoplastics include high density polyethylene, polypropylene, polytetrafluoroethylene, polychlorotrifluoroethylene, polyolefin copolymers, polyacetals, polyphenylene oxides, polysulfones, polyamides, and the like.

たた、本発明においお掲瀺されるスペヌサヌの
材質ずしおは重合枩床近傍で良奜な柔軟性を有す
る熱可塑性プラスチツクやゎム匟性䜓を䜿甚する
こずができる。このような材料の䟋ずしおは、䜎
密床ポリ゚チレン、゚チレン−酢酞ビニル共重合
䜓、゚チレン−゚チルアクリレヌト共重合䜓、軟
質塩化ビニル、アむオノマヌ暹脂、りレタンゎ
ム、倩然ゎム、む゜プレンゎム、ブタゞ゚ンゎ
ム、スチレン−ブタゞ゚ンゎム、クロロプレンゎ
ム、ニトリルゎム、シリコヌンゎム、アクリルゎ
ムなどを挙げるこずが出来る。これらの材料は、
通垞の成圢法により所定の圢状に成圢しお䜿甚す
る。 Further, as the material for the spacer according to the present invention, thermoplastic plastics or rubber elastic bodies having good flexibility near the polymerization temperature can be used. Examples of such materials include low density polyethylene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, soft vinyl chloride, ionomer resin, urethane rubber, natural rubber, isoprene rubber, butadiene rubber, styrene- Examples include butadiene rubber, chloroprene rubber, nitrile rubber, silicone rubber, and acrylic rubber. These materials are
It is used after being molded into a predetermined shape using a normal molding method.

本発明においお瀺される雄を成圢郚材の第
光孊的成圢面ず雌の成圢郚材の第光孊的成
圢面は結合されおメニスカス圢状のコンタクト
レンズを圢成するため、第光孊的成圢面が実
質的に凞面であるずきには第光孊的成圢面は
実質的に凹面である必芁があり、第光孊的成圢
面が実質的に凹面であるずきには第光孊的成
圢面は実質的に凞面である必芁があるが、いず
れの組合せに぀いおも本発明の範囲にある。 The male shown in the present invention is the first part of the molded member 4.
The optical molding surface 1 and the second optical molding surface 5 of the female molding member 8 are combined to form a meniscus-shaped contact lens, so that when the first optical molding surface 1 is substantially convex, the second optical molding surface 1 is substantially convex. The optical shaping surface 5 should be substantially concave, and when the first optical shaping surface 1 is substantially concave, the second optical shaping surface 5 should be substantially convex; Any combination is within the scope of the present invention.

たた、本発明による雌雄の成圢郚材の第
光孊的成圢面ず、第光孊的成圢面は球面
の組合せにより蚭蚈されたコンタクトレンズに充
分適応できるが、必芁に応じお䞀方たたは䞡方が
非球面により構成された蚭蚈においおも本発明に
なんら制限を加えるものではない。 Further, the first optical molding surface 1 and the second optical molding surface 5 of the male and female molding members 4 and 8 according to the present invention can be fully adapted to a contact lens designed by a combination of spherical surfaces, but if necessary, one can be used. Alternatively, the present invention is not limited in any way to a design in which both surfaces are made of aspherical surfaces.

曎に、本発明の成圢型においおは堎合によ぀お
組合された成圢型䞊に荷重をかけるこずによ぀お
䜿甚するこずを劚げない。 Furthermore, the mold of the present invention does not preclude use by applying a load on the combined mold as the case requires.

䜜甚 本発明によるコンタクトレンズ成圢型におい
お、雄の成圢郚材ず雌の成圢郚材は䞭間にス
ペヌサヌを介し、䞻軞に沿぀お組合されるが、
その際に雄の成圢郚材の第成圢郚ず雌の成
圢郚材の第成圢郚ずが䞊䞋に移動可胜な嵌
め合い構造を圢成し、倖郚から遮断されたコンタ
クトレンズ成圢のための空隙を創出する。そしお
䞡成圢郚材がスペヌサヌを介しお完党に
接觊した時にこの空隙は予め定められたコンタク
トレンズの圢状に盞圓する容量を䞎える。[Function] In the contact lens mold according to the present invention, the male molding member 4 and the female molding member 8 are assembled along the main axis with a spacer 9 interposed between them.
At that time, the first molding part 2 of the male molding member 4 and the second molding part 6 of the female molding member 8 form a vertically movable fitting structure, and the contact lens molding is isolated from the outside. Create a void. When the molded members 4 and 8 are in complete contact with each other via the spacer 9, this gap provides a capacity corresponding to the predetermined shape of the contact lens.

重合固化しおコンタクトレンズずなる重合組成
液は、雌の成圢郚材の第成圢郚に成圢する
コンタクトレンズの䜓積に加えお重合収瞮量ずオ
ヌバヌフロヌする量を芋蟌んだだけ幟分倚めの分
量をも぀お滎䞋される。その埌スペヌサヌを第
成圢郚材のスペヌサヌ接觊郚に配眮し、雄の成
圢郚材を䞻軞に沿぀お雌の成圢郚材䞊にのせ
お、䞋方に移動させおゆく。このずき、䜙剰の重
合組成液は雄の成圢郚材の移動に䌎぀お成圢空
間から埐々に排陀され、液溜によ぀おスペヌ
サヌに接觊しないように保持される。そしお䞡
成圢郚材がスペヌサヌを介しお完党に接
觊した時に䞀定容量の重合組成液がコンタクトレ
ンズ成圢のための空隙を満たす。この時、重合組
成液によ぀お満たされたコンタクトレンズ成圢の
ための空隙は前述のように第成圢郚ず第成
圢郚ずによ぀お倖郚から遮断され、重合性液の
空気ずの接觊がない。このようにしお重合性液を
満たした成圢型を恒枩槜内に所定の昇枩プログラ
ムに埓぀お加熱するこずにより、最終的に所望の
コンタクトレンズを圢成するこずができる。 The amount of the polymerized composition liquid that will be polymerized and solidified to form a contact lens is slightly larger to account for the volume of the contact lens to be molded into the second molding section 6 of the female molding member 8, as well as the amount of polymerization shrinkage and overflow. It is dripped with Thereafter, the spacer 9 is placed on the spacer contact portion of the second molded member, and the male molded member 4 is placed on the female molded member 8 along the main axis and moved downward. At this time, the excess polymer composition liquid is gradually removed from the molding space as the male molding member 4 moves, and is held by the liquid reservoir 6a so as not to contact the spacer 9. When both the molding members 4 and 8 are brought into complete contact with each other via the spacer 9, a certain volume of the polymeric composition liquid fills the gap for contact lens molding. At this time, the void for contact lens molding filled with the polymeric composition liquid is blocked from the outside by the first molding section 2 and the second molding section 6, as described above, and the air in the polymerizable liquid is There is no contact with By heating the mold filled with the polymerizable liquid in this manner in a constant temperature bath according to a predetermined temperature increase program, a desired contact lens can finally be formed.

重合組成液は前蚘の加熱過皋においお重合を開
始するず重合収瞮によ぀おその䜓積を枛少しおい
くが、重合組成液はこの時に第光孊的成圢面
ず第光孊的圢成面に察しお接着性を瀺すよう
になり、その結果、䞡光孊面を互いに接近させる
方向に力を及がす。本発明によるスペヌサヌ
は、かかる重合過皋においお充分な柔軟性を瀺す
こずにより䞡成圢郚材の接近によ぀お䌎぀
おその厚みを枛少させ、重合収瞮をレンズの肉厚
方向に吞収する。 When the polymerization composition liquid starts polymerizing in the heating process, its volume decreases due to polymerization contraction, and at this time, the polymerization composition liquid starts to polymerize on the first optical forming surface 1.
and the second optical forming surface 5, and as a result, a force is exerted in a direction that brings both optical surfaces closer to each other. Spacer 9 according to the invention
exhibits sufficient flexibility during the polymerization process, thereby reducing its thickness as the molded members 4 and 8 approach each other, and absorbing polymerization shrinkage in the thickness direction of the lens.

なお、䞊蚘重合組成液は、単䞀組成あるいは倚
成分組成モノマヌたたはプレポリマヌに、倚官胜
性架橋剀および重合開始剀を適量添加しおなるも
のである。ここで䜿甚されるモノマヌずしおは次
のものが挙げらるる。 The above polymer composition liquid is made by adding appropriate amounts of a polyfunctional crosslinking agent and a polymerization initiator to a monomer or prepolymer having a single composition or a multicomponent composition. The monomers used here include the following.

(ã‚€) メタクリル酞メチル、メタクリル酞゚チル、
メタクリル酞−ブチル、メタクリル酞iso−
ブチル、メタクリル酞tert.−ブチル、メタクリ
ン酞−プロピル、メタクリル酞iso−プロピ
ル、メタクリル酞りラリル、メタクリル酞シク
ロヘキシル、メタクリル酞ベンゞル、メタクリ
ル酞メチルベンゞル、メタクリン酞む゜ボルニ
ル等の疎氎性メタクリル酞眮換モノマヌ。(a) Methyl methacrylate, ethyl methacrylate,
n-butyl methacrylate, iso- methacrylate
Hydrophobic methacrylic acid substituted monomers such as butyl, tert.-butyl methacrylate, n-propyl methacrylate, iso-propyl methacrylate, uralyl methacrylate, cyclohexyl methacrylate, benzyl methacrylate, methylbenzyl methacrylate, isobornyl methacrylate.

(ロ) アクリル酞メチル、アクリル酞゚チル、アク
リル酞−ブチル、アクリル酞iso−ブチル、
アクリル酞tert.−ブチル、アクリル酞−プロ
ピル、アクリル酞iso−プロピル、アクリル酞
シクロヘキシル、アクリル酞ベンゞル等の疎氎
性アクリル酞眮換モノマヌ。(b) Methyl acrylate, ethyl acrylate, n-butyl acrylate, iso-butyl acrylate,
Hydrophobic acrylic acid substituted monomers such as tert.-butyl acrylate, n-propyl acrylate, iso-propyl acrylate, cyclohexyl acrylate, benzyl acrylate.

(ハ) トリメチルシリルメタクリレヌト、トリメチ
ルシリルメチルメタクリレヌト、トリス−トリ
メチルシロキシシリル−プロピルメタクリレヌ
ト等のシリコンを有するメタクリル酞眮換モノ
マヌ。(c) Methacrylic acid-substituted monomers containing silicon, such as trimethylsilyl methacrylate, trimethylsilyl methyl methacrylate, and tris-trimethylsiloxysilyl-propyl methacrylate.

(ニ) トリメチルシリルアクリレヌト、トリメチル
シリルメチルアクリレヌト、トリス−トリメチ
ルシロキシシリル−プロピルアクリレヌト等の
シリコンを有するアクリル酞眮換モノマヌ。(d) Silicon-containing acrylic acid-substituted monomers such as trimethylsilyl acrylate, trimethylsilylmethyl acrylate, and tris-trimethylsiloxysilyl-propyl acrylate.

(ホ) −ヒドロキシ゚チルメタクリレヌト、−
ヒドロキシプロピルメタクリレヌト、−ヒド
ロキシブチルメタクリレヌト、グリセリルメタ
クリレヌト、グリシゞルメタクリレヌト、メタ
クリル酞等の芪氎性メタクリル酞眮換モノマ
ヌ。(e) 2-hydroxyethyl methacrylate, 2-
Hydrophilic methacrylic acid substituted monomers such as hydroxypropyl methacrylate, 2-hydroxybutyl methacrylate, glyceryl methacrylate, glycidyl methacrylate, methacrylic acid.

(ヘ) −ヒドロキシ゚チルアクリレヌト、−ヒ
ドロキシプロピルアクリレヌト、−ヒドロキ
シブチルアクリレヌト、グリセリルアクリレヌ
ト、グリシゞルアクリレヌト、アクリル酞等の
芪氎性アクリル酞眮換モノマヌ。(F) Hydrophilic acrylic acid-substituted monomers such as 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxybutyl acrylate, glyceryl acrylate, glycidyl acrylate, and acrylic acid.

(ト) −メチルアクリルアミド、、−ゞメチ
ルアクリルアミド、−メチルメタクリルアミ
ド、、−ゞメチルメタクリルアミド等の
−アルキル眮換アクリルアミドたたは−アル
キル眮換メタクリルアミド等の芪氎性モノマ
ヌ。(g) N such as N-methylacrylamide, N,N-dimethylacrylamide, N-methylmethacrylamide, N,N-dimethylmethacrylamide, etc.
- Hydrophilic monomers such as alkyl-substituted acrylamides or N-alkyl-substituted methacrylamides.

(チ) −ビニルピロリドン、メチル眮換−ビニ
ルピロリドン等のアルキル眮換−ビニルピロ
リドン。(h) Alkyl-substituted N-vinylpyrrolidone such as N-vinylpyrrolidone and methyl-substituted N-vinylpyrrolidone.

たた倚官胜性架橋剀ずしおは、゚チレングリコ
ヌルゞメタクリレヌト、ゞ゚チレングリコヌルゞ
メクタリレヌト、トリ゚チレングリコヌルゞメタ
クリレヌト、テトラ゚チレングリコヌルゞメタク
リレヌト、ポリ゚チレングリコヌルゞメクタリレ
ヌト、トリメチロヌルプロパントリメタクリレヌ
ト、ビニルメタクリレヌト、アリルメタクリレヌ
ト、トリアリルむ゜シアヌレヌト、ビニルアクリ
レヌト、ゞビニルベンれン等が挙げられ、曎に重
合開始剀ずしおアゟビスむ゜ブチロニトリル、ア
ゟビスゞメチルバレロニトリル、過酞化ベンゟむ
ル、過酞化ゞ−tert.−ブチル、過酞化ラりロむル
等が䜿甚される。 In addition, examples of polyfunctional crosslinking agents include ethylene glycol dimethacrylate, diethylene glycol dimectarylate, triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, polyethylene glycol dimectarylate, trimethylolpropane trimethacrylate, vinyl methacrylate, allyl methacrylate, triethylene glycol dimethacrylate, Examples include allyl isocyanurate, vinyl acrylate, divinylbenzene, etc. Furthermore, as polymerization initiators, azobisisobutyronitrile, azobisdimethylvaleronitrile, benzoyl peroxide, di-tert.-butyl peroxide, lauroyl peroxide, etc. used.

実斜䟋 以䞋、本発明を実斜䟋に基づき曎に詳现に説明
する。[Examples] Hereinafter, the present invention will be explained in more detail based on Examples.

実斜䟋  第図は本発明による䞀実斜䟋を瀺す䞀郚砎断
分解斜芖図であり、第図は第図で瀺された実
斜䟋の砎断正面図である。本実斜䟋においお、雄
の成圢郚材ず雌の成圢郚材はポリプロピレン
を射出成圢しお補䜜したものであり、スペヌサヌ
ぱチレン−゚チルアクリレヌト共重合䜓を射
出成圢しお補䜜したものである。雄の成圢郚材
の第成圢郚は曲率半埄8.00±0.01mmの第光
孊的成圢面を先端に有する盎埄8.5mmの円柱状
をしおいる。雌の成圢郚材の第成圢郚は曲
率半埄8.47±0.01mmの第光孊的成圢面を底郚
に有する内埄8.5mmの円筒状をなし、䜙剰の重合
組成液をスペヌサヌに接觊しないよう保持する
ための液溜を有しおいる。たた、スペヌサヌ
は、3.00±0.01mmの均䞀な肉厚を有する平らな
リング圢状をしおいる。Embodiment 1 FIG. 1 is a partially cutaway exploded perspective view showing an embodiment of the present invention, and FIG. 2 is a cutaway front view of the embodiment shown in FIG. In this embodiment, the male molded member 4 and the female molded member 8 are manufactured by injection molding polypropylene, and the spacer 9 is manufactured by injection molding ethylene-ethyl acrylate copolymer. Male molded member 4
The first molding part 2 has a cylindrical shape with a diameter of 8.5 mm and has a first optical molding surface 1 with a radius of curvature of 8.00±0.01 mm at the tip. The second molding part 6 of the female molding member 8 has a cylindrical shape with an inner diameter of 8.5 mm and has a second optical molding surface 5 with a radius of curvature of 8.47±0.01 mm at the bottom, and does not allow excess polymeric composition liquid to come into contact with the spacer 9. It has a liquid reservoir 6a for holding the liquid. Further, the spacer 9 has a flat ring shape with a uniform wall thickness of 3.00±0.01 mm.

本実斜䟋においおはメチルメタクリレヌト100
重量郚、゚チレングリコヌルゞメタクリレヌト
重量郚、アゟビスむ゜ブチロニトリル0.2重量郹
よりなる重合組成液を雌の成圢郚材の第の成
圢郚に、0.2ml滎䞋し、雌の成圢郚材のスペ
ヌサヌずの接觊郚にスペヌサヌを配眮し、雄
の成圢郚材を䞻軞に沿぀お組合せた。 In this example, methyl methacrylate 100
Parts by weight, 1 part ethylene glycol dimethacrylate
0.2 ml of a polymer composition liquid consisting of 0.2 parts by weight of azobisisobutyronitrile was dropped onto the second molded part 6 of the female molded member 8, and the polymer composition liquid was added to the contact part 7 of the female molded member 8 with the spacer. A spacer 9 was placed, and the male molded member 4 was assembled along the main axis.

こうしお準備された成圢型を熱颚埪環匏の恒枩
槜内に蚭眮し、50℃で12時間、90℃で時間加熱
した。加熱を終えた成圢型は宀枩たで冷华したの
ち分解し、成圢されたコンタクトレンうを取り出
した。 The mold thus prepared was placed in a thermostatic oven with hot air circulation and heated at 50°C for 12 hours and at 90°C for 6 hours. After heating, the mold was cooled to room temperature and then disassembled, and the molded contact lens was taken out.

こうしお埗られたコンタクトレンズの衚面およ
び内郚には空隙やボむドはなく、たた呚囲にバリ
の発生もなか぀た。このコンタクトレンズのベヌ
スカヌブは8.00±0.02mmであり、フロントカヌブ
の曲率半埄は8.47±0.02mmであり、そのサむズは
8.5mmであ぀た。たたレンズメヌタヌを甚いお成
圢されたコンタクトレンズの屈折床を枬定したず
ころ、−3.00±0.05デむオプトリヌの屈折床を有
しおおり、芳察されたコロナも良奜であ぀た。 There were no voids or voids on the surface or inside of the contact lens thus obtained, and no burrs were generated around the lens. The base curve of this contact lens is 8.00±0.02mm, the radius of curvature of the front curve is 8.47±0.02mm, and its size is
It was 8.5mm. Further, when the refractive power of the molded contact lens was measured using a lens meter, it was found to have a refractive power of -3.00±0.05 diopters, and the observed corona was also good.

実斜䟋  第図は本発明による第の実斜䟋を瀺す砎断
正面図である。雄の成圢郚材および雌の成圢
郚材はステンレスを機械加工するこずにより
䜜補したものであり、スペヌサヌは䜎密床ポ
リ゚チレンを射出成圢しお䜜補したものである。Embodiment 2 FIG. 3 is a cutaway front view showing a second embodiment of the present invention. The male molded member 13 and the female molded member 17 are manufactured by machining stainless steel, and the spacer 18 is manufactured by injection molding low density polyethylene.

本実斜䟋の第成圢郚は曲率半埄7.60±
0.005mmの凹球面よりなる第光孊的成圢面
を有する盎埄8.8mmの円柱状であり、第成圢郚
は曲率半埄7.80±0.005mmの凞球面よりなる
第光孊的成圢面を有する内埄8.8mmの円筒
状をしおおり、䜙剰の重合組成液を保持するため
の液だめを有しおいる。たた、スペヌサヌ
は5.00±0.01mmの均䞀な肉厚を有する平らな
リング圢状をしおいる。 The first molded part 11 of this embodiment has a radius of curvature of 7.60±
First optical molding surface 10 made of a 0.005 mm concave spherical surface
The second molding part 15 has a cylindrical shape with an inner diameter of 8.8mm and a second optical molding surface 14 made of a convex spherical surface with a radius of curvature of 7.80±0.005mm. It has a liquid reservoir 15a for holding the polymer composition liquid. Further, the spacer 18 has a flat ring shape with a uniform wall thickness of 5.00±0.01 mm.

本実斜䟋で甚いた重合組成液ずトリス−トリメ
チルシロキサニルシリルプロピルメタクリレヌト
40重量郚、゚チルメタクリレヌト60重量郚、トリ
゚チレングリコヌルゞメタクリレヌト重量郚、
アゟビスゞメチルバレロニトリル0.5重量郚の混
合液よりなる。 Polymerization composition liquid and tris-trimethylsiloxanylsilylpropyl methacrylate used in this example
40 parts by weight, 60 parts by weight of ethyl methacrylate, 2 parts by weight of triethylene glycol dimethacrylate,
Consists of a mixed solution of 0.5 parts by weight of azobisdimethylvaleronitrile.

実斜䟋ず同様の方法により重合組成液を泚入
し成圢型を組合せ、恒枩槜䞭で40℃−時間、60
℃−時間、80℃−時間加熱しお重合を行぀た
埌、宀枩にたで冷华しお成圢型を分解し、成圢さ
れたコンタクトレンズを取り出した。 The polymer composition solution was injected in the same manner as in Example 1, the mold was assembled, and the mixture was heated at 40℃ for 8 hours in a constant temperature bath for 60 minutes.
After polymerization was carried out by heating at -4 hours at 80°C and for 5 hours at 80°C, the mold was disassembled by cooling to room temperature and the molded contact lens was taken out.

成圢されたコンタクトレンズにはヒケ、バリ等
の倖芳䞊の欠陥がなく、ベヌスカヌブの曲率半埄
は7.80±0.01mmの曲率半埄7.60±0.01mmのフロン
トカヌブ、8.8mmのサむズを有しおいた。たたこ
のレンズの屈折床は2.00±0.05デむオプトリヌ
であ぀た。 The molded contact lens had no external defects such as sink marks or burrs, and had a base curve with a radius of curvature of 7.80±0.01 mm, a front curve with a radius of curvature of 7.60±0.01 mm, and a size of 8.8 mm. The refractive power of this lens was +2.00±0.05 diopters.

実斜䟋  第図は本発明による第実斜䟋を瀺す砎断正
面図である。本実斜䟋の雄の成圢郚材ず雌の
成圢郚材はポリクロルトリフルオル゚チレン
を射出成型しお䜜補したものであり、スペヌサヌ
はポリりレタンラバヌを圧瞮成型しお䜜補し
たものである。なお、図䞭は第光孊面、
は第成圢郚である。Embodiment 3 FIG. 4 is a cutaway front view showing a third embodiment of the present invention. The male molded member 22 and the female molded member 26 of this embodiment are made by injection molding polychlorotrifluoroethylene, and the spacer 27 is made by compression molding polyurethane rubber. In addition, 37 in the figure is the second optical surface, 3
8 is a second molding section.

雄の成圢郚材の第成圢郚は曲率半埄
5.93±0.01mmの凞球面よりなる第光孊的成圢面
を有する盎埄10.0mmの円柱状をしおおり、雌の成
圢郚材の第の成圢郚は曲率半埄6.32±
0.01mmの凹球面よりなる第光孊的成圢面を
有する内埄10.0mmの円筒状をしおおり、液だめ
を有しおいる。たたスペヌサヌは厚さ2.00±
0.01mmのオヌリング状をしおいる。 The first molded portion 20 of the male molded member 22 has a radius of curvature.
It has a cylindrical shape with a diameter of 10.0 mm and has a first optical molding surface made of a convex spherical surface of 5.93±0.01 mm, and the second molding portion 24 of the female molding member 26 has a radius of curvature of 6.32±.
It has a cylindrical shape with an inner diameter of 10.0 mm and a second optical molding surface 23 consisting of a concave spherical surface of 0.01 mm.
4a. Also, the thickness of the spacer is 2.00±
It has a 0.01mm O-ring shape.

−ヒドロキシメチルメタクリレヌト88重量
郚、メチルメタクリレヌト10重量郚、゚チレング
リコヌルゞメタクリレヌト重量郚、メタクリル
酾1.5重量郚、アゟビスむ゜ブチロニトリル0.2重
量郚よりなる重合組成液を甚いお、実斜䟋ず同
様の方法により泚入しお成圢型を組合せ、恒枩槜
内で40℃で10時間、60℃で時間、80℃で時間
加熱したのち成圢型を分解しお成圢されたコンタ
クトレンズを取り出した。 Example 1 was carried out using a polymer composition solution consisting of 88 parts by weight of 2-hydroxymethyl methacrylate, 10 parts by weight of methyl methacrylate, 1 part by weight of ethylene glycol dimethacrylate, 1.5 parts by weight of methacrylic acid, and 0.2 parts by weight of azobisisobutyronitrile. Inject in the same manner as above, assemble the mold, and heat in a constant temperature oven at 40°C for 10 hours, 60°C for 4 hours, and 80°C for 4 hours, then disassemble the mold and take out the molded contact lens. Ta.

成圢されたレンズにはヒケやバリが無く、曲率
半埄5.93±0.02mmのベヌスカヌブ、曲率半埄6.32
±0.02mmのフロントカヌブ、10.0mmのサむズを有
しおいた。 The molded lens has no sink marks or burrs, a base curve with a radius of curvature of 5.93±0.02mm, and a radius of curvature of 6.32mm.
It had a front curve of ±0.02mm and a size of 10.0mm.

次に埗られた也燥状態のレンズを生理食塩䞭に
浞し、飜和膚最させお゜フトコンタクトレンズず
した。この゜フトコンタクトレンズはベヌスカヌ
ブの曲率半埄8.0mm、サむズ13.5.±0.03mmであり、
倉圢や濁りなどの無い安定した圢状を有しおい
た。このレンズの屈折床は−3.00±0.08デむオプ
トリヌであり、含氎率は40±0.3であ぀た。 Next, the obtained dry lens was immersed in physiological saline and saturated and swelled to form a soft contact lens. This soft contact lens has a base curve radius of 8.0mm and a size of 13.5.±0.03mm.
It had a stable shape without deformation or turbidity. The refractive power of this lens was -3.00±0.08 diopters, and the water content was 40±0.3%.

比范䟋  第図は比范䟋を瀺す砎断正面図である。本比
范䟋の雄の成型郚材ず雌の成型郚材はス
テンレスにより䜜補したものであり、たたスペヌ
サヌを䜿甚しおいない。なお、図䞭は第光
孊面、は第成圢郚、は第光孊面、
は第成圢郚である。Comparative Example 1 FIG. 5 is a cutaway front view showing a comparative example. The male molded member 30 and female molded member 33 of this comparative example were made of stainless steel, and no spacer was used. In addition, in the figure, 28 is a first optical surface, 29 is a first molded part, 31 is a second optical surface, 3
2 is a second molding section.

実斜䟋で䜿甚した重合組成液を型内に0.2ml
泚入し、成圢型を組合せた埌、実斜䟋ず同様に
恒枩槜内で加熱を行぀た。成圢型を宀枩たで冷华
した埌分解し、成圢されたコンタクトレンズを取
り出したずころ、レンズの衚面及び呚蟺にヒケが
発生しおおり、コンタクトレンズずしお䜿甚する
こずができないものであ぀た。 Put 0.2ml of the polymerization composition solution used in Example 2 into the mold.
After pouring and assembling the molds, heating was performed in a constant temperature bath in the same manner as in Example 1. When the mold was cooled to room temperature and then disassembled, and the molded contact lens was taken out, sink marks had occurred on the surface and periphery of the lens, and it could not be used as a contact lens.

比范䟋  第図は他の比范䟋を瀺す砎断正面図である。
雄の成圢郚材ず雌の成圢郚材ぱチレン
−酢酞ビニル共重合䜓よりなり、雄の成圢郚材
の第成圢郚は、呚囲に円環状の薄肉のリ
ムが䞀䜓に付着した第光孊面を有しお
いる。この薄肉のリムは重合組成液が重合時
に䜓積収瞮を瀺す時にレンズの䞭心方向に屈曲し
おその高さを枛少させ、重合収瞮を吞収するため
に蚭けられたものである。なお、図䞭は第
光孊面、は第成圢郚である。Comparative Example 2 FIG. 6 is a cutaway front view showing another comparative example.
The male molding member 36 and the female molding member 39 are made of ethylene-vinyl acetate copolymer.
The first molded portion 35 of No. 6 has a first optical surface 34 around which a thin annular rim 40 is integrally attached. This thin rim 40 is provided to absorb the polymerization shrinkage by bending toward the center of the lens to reduce its height when the polymer composition exhibits volumetric shrinkage during polymerization. In addition, 37 in the figure is the second
The optical surface 38 is a second molded part.

雄の成圢郚材の倖埄は7.9mmで、曲率半埄
7.45±0.03mmの第光孊面を有しおおり、雌
の成圢郚材の内埄は8.2ないし8.4mmで、第
光孊面は8.55±0.05mmの曲率半埄を有しおい
る。 The outer diameter of the male molded member 35 is 7.9 mm, and the radius of curvature is
It has a first optical surface 34 of 7.45±0.03 mm, an inner diameter of the female molded member 39 is 8.2 to 8.4 mm, and a second optical surface 34 has a diameter of 7.45±0.03 mm.
Optical surface 37 has a radius of curvature of 8.55±0.05 mm.

メチルメタクリレヌト98重量郚、゚チレングリ
コヌルゞメタクリレヌト20重量郚、ゞ−−ブチ
ルシクロヘキシルパヌオキシゞカヌボネヌト0.3
重量郚よりなる重合組成液を0.3ml雌の成圢郚材
内に泚入し、成圢型を組合せ60℃の恒枩槜䞭で
1.5時間加熱した埌、冷华し成圢型を分解する。 98 parts by weight of methyl methacrylate, 20 parts by weight of ethylene glycol dimethacrylate, 0.3 parts by weight of di-t-butylcyclohexyl peroxydicarbonate
Pour 0.3 ml of the polymer composition liquid consisting of parts by weight into the female molding member, combine the molds, and place in a constant temperature bath at 60℃.
After heating for 1.5 hours, cool and disassemble the mold.

埗られたコンタクトレンズにはヒケやバリの発
生は無いが、そのベヌスカヌブの曲率半埄は7.47
±0.4mmであ぀お良奜な粟床が埗られなか぀た。
たた、このレンズの屈折床の枬定結果は−7.50な
いし−8.50デむオプトリヌの著しいバラツキを瀺
し、実甚䞊の問題を有しおいた。 The obtained contact lens has no sink marks or burrs, but the radius of curvature of its base curve is 7.47.
It was ±0.4mm, and good accuracy could not be obtained.
Further, the measurement results of the refractive power of this lens showed a significant variation of -7.50 to -8.50 diopters, which caused a practical problem.

なお、曲率半埄の枬定にはNEIZ(æ ª)補デゞタル
コンタクトゲヌゞおよび富士写真光機(æ ª)補レヌザ
ヌ干枉蚈を䜿甚し、盎埄の枬定にはニコン(æ ª)補投
圱機を䜿甚した。たた、倖芳の芳察は実䜓顕埮鏡
および光孊顕埮鏡を䜿甚した。 Note that a digital contact gauge manufactured by NEIZ Corporation and a laser interferometer manufactured by Fuji Photo Equipment Co., Ltd. were used to measure the radius of curvature, and a projector manufactured by Nikon Corporation was used to measure the diameter. In addition, a stereomicroscope and an optical microscope were used to observe the appearance.

発明の効果 本発明の実斜䟋により埗られたコンタクトレン
ズは、比范䟋に芋られるようなヒケの発生問題や
充分な光孊粟床が埗られないずい぀た問題がな
く、たた成圢されたコンタクトレンズの呚囲にバ
リが発生するずい぀た問題もない。即ち、本発明
によるコンタクトレンズ成圢型を甚いるこずによ
り次のような優れた効果が埗られる。[Effects of the Invention] The contact lenses obtained according to the examples of the present invention do not have the problem of sink marks or the inability to obtain sufficient optical precision as seen in the comparative examples, and are free from the problems of molded contacts. There are no problems with burrs forming around the lens. That is, by using the contact lens mold according to the present invention, the following excellent effects can be obtained.

 ヒケやバリなどの欠陥の無いコンタクトレン
ズを䞀切機械加工するこずなしに極めお容易に
補造するこずができる。1. Contact lenses free of defects such as sink marks and burrs can be manufactured extremely easily without any machining.

 成圢されるレンズの光孊特性や物性が極めお
安定であり、再珟性に優れおいる。2. The optical properties and physical properties of the molded lens are extremely stable and have excellent reproducibility.

 光孊的粟床の優れたコンタクトレンズを極め
お少ない工皋数で、しかも再珟性良奜に補造す
るこずができる。3. Contact lenses with excellent optical precision can be manufactured with an extremely small number of steps and with good reproducibility.

 ベヌスカヌブ、フロントカヌブ、ベベル、フ
ランゞカヌブ、呚蟺の圢状などが、極めお倚様
に蚭蚈されたものに぀いおも成圢するこずがで
きる。4. It is possible to mold objects with extremely diverse designs such as base curves, front curves, bevels, flange curves, peripheral shapes, etc.

 成圢郚材ずスペヌサヌが独立しおいるため、
それぞれの材質を自由に遞択するこずが可胜で
あり、䜿甚できる材料の範囲が広く重合組成液
の皮類や芁求される粟床に応じお最適な材質を
遞ぶこずができる。5 Since the molded member and spacer are independent,
Each material can be freely selected, and the range of materials that can be used is wide, and the optimal material can be selected depending on the type of polymerization composition liquid and the required precision.

 スペヌサヌが重合組成液に接觊するこずがな
いため、スペヌサヌ材質を重合組成液による溶
解、倉質等の問題を考慮するこずなく遞定する
こずができる。6. Since the spacer does not come into contact with the polymerization composition liquid, the spacer material can be selected without considering problems such as dissolution or deterioration due to the polymerization composition liquid.

 ハヌドコンタクト、゜フトコンタクトのどち
らのコンタクトレンズに぀いおも利甚するこず
ができ、たた成圢しようずするコンタクトレン
ズ玠材の機械的な加工性などに制限されるこず
が無い。7. It can be used for both hard contact lenses and soft contact lenses, and is not limited by the mechanical processability of the contact lens material to be molded.

本発明によるこのような効果は、雄の成圢郚材
の第成圢郚材ず雌の成圢郚材の第成圢郚ずに
おいお、はめあい構造を圢成するこずにより、コ
ンタクトレンズ成圢のための空隙を倖郚から遮
断、重合組成液が空気に觊れたり、䜙剰の重合組
成液がレンズ呚囲に付着するこずがないこず、ス
ペヌサヌが柔軟な材質よりなり、重合収瞮にずも
なう䜓積収瞮をスペヌサヌの肉厚の枛少による䞡
成圢郚材の接近によ぀お吞収できるこず、重合収
瞮に察しお成圢郚材自䜓は倉圢したり、収瞮した
りするこずがないため、成圢されるコンタクトレ
ンズの曲率半埄や盎埄などの重芁な寞法が倉動し
ないこずなどの本発明による成圢型の独特な特城
により始めお実珟されるものである。 Such effects of the present invention are achieved by forming a fitting structure between the first molding member of the male molding member and the second molding part of the female molding member, thereby blocking the gap for contact lens molding from the outside. , the polymer composition solution does not come into contact with the air and excess polymer composition solution does not adhere to the surroundings of the lens, the spacer is made of a flexible material, and the volume shrinkage due to polymerization shrinkage is suppressed by reducing the thickness of the spacer. It can be absorbed by the proximity of the parts, and the molded parts themselves do not deform or shrink due to polymerization shrinkage, so important dimensions such as the radius of curvature and diameter of the contact lens to be molded do not change. This is achieved for the first time by the unique features of the mold according to the present invention.

【図面の簡単な説明】[Brief explanation of the drawing]

第図は本発明による第実斜䟋を瀺す䞀郚砎
断分解斜芖図、第図は第実斜䟋の瞊断正面
図、第図は本発明による第実斜䟋を瀺す瞊断
正面図、第図は本発明による第実斜䟋を瀺す
瞊断正面図であり、第図、第図は比范䟋を瀺
す瞊断正面図である。   第光孊面、
  第光孊面、
  第成圢郚、  第成圢
郚、  スペヌ
サヌずの接觊郚、  第成圢郚
材、  第成圢郚材、
  スペヌサヌ、
  液溜、  円環状リム。 FIG. 1 is a partially broken exploded perspective view showing a first embodiment according to the present invention, FIG. 2 is a longitudinal sectional front view of the first embodiment, and FIG. 3 is a longitudinal sectional front view showing a second embodiment according to the invention. FIG. 4 is a longitudinal sectional front view showing a third embodiment according to the present invention, and FIGS. 5 and 6 are longitudinal sectional front views showing a comparative example. 1, 10, 19...first optical surface, 5, 14, 2
3, 31, 37...second optical surface, 2, 11, 20
...First molded part, 6,15,24...Second molded part, 3,7,12,16,21,25...Contact part with spacer, 4,13,22...First molded member, 8, 17, 26... second molded member, 9, 1
8, 27...Spacer, 6a, 15a, 24a
...liquid reservoir, 10...circular rim.

Claims (1)

【特蚱請求の範囲】  雄の成圢郚材ず雌の成圢郚材ずが䞡成圢郚材
の成圢郚倖呚にスペヌサヌを介し、䞻軞に沿぀お
結合されるこずを特城ずするコンタクトレンズ成
圢型。  雄及び雌の成圢郚材が光孊的成圢面を有し、
スペヌサヌが前蚘成圢郚材ず共通の䞻軞を有する
リング状をなし、か぀前蚘光孊的成圢面ずは分離
した䜍眮にあるこずを特城ずする特蚱請求の範囲
第項蚘茉のコンタクトレンズ成圢型。  成圢郚材に液溜を蚭けたこずを特城ずする特
蚱請求の範囲第項蚘茉のコンタクトレンズ成圢
型。  液溜が、雌の成圢郚材の挿入郚呚蟺に斜面状
に蚭けられたこずを特城ずする特蚱請求の範囲第
項蚘茉のコンタクトレンズ成圢型。  雄の成圢郚材の光孊的成圢面が実質的に凞面
であり、か぀雌の成圢郚材の光孊的成圢面が実質
的に凹面であるこずを特城ずする特蚱請求の範囲
第項蚘茉のコンタクトレンズ成圢型。  雄の成圢郚材の光孊的成圢面が実質的に凹面
であり、か぀雌の成圢郚材の光孊的成圢面が実質
的に凞面であるこずを特城ずする特蚱請求の範囲
第項蚘茉のコンタクトレンズ成圢型。  スペヌサヌ郚品が熱可塑性物質たたはゎム匟
性䜓からなるこずを特城ずする特蚱請求の範囲第
項蚘茉のコンタクトレンズ成圢型。[Scope of Claims] 1. A contact lens mold characterized in that a male molding member and a female molding member are joined along the main axis via a spacer around the outer periphery of the molding portion of both molding members. 2. The male and female molding members have optical molding surfaces;
2. The contact lens mold according to claim 1, wherein the spacer has a ring shape having a common main axis with the molding member and is located at a position separated from the optical molding surface. 3. The contact lens mold according to claim 1, wherein the molding member is provided with a liquid reservoir. 4. The contact lens mold according to claim 3, wherein the liquid reservoir is provided in a slope shape around the insertion portion of the female molding member. 5. The contact according to claim 1, wherein the optical molding surface of the male molding member is substantially convex, and the optical molding surface of the female molding member is substantially concave. Lens mold. 6. The contact according to claim 1, wherein the optical molding surface of the male molding member is a substantially concave surface, and the optical molding surface of the female molding member is a substantially convex surface. Lens mold. 7. The contact lens mold according to claim 1, wherein the spacer component is made of a thermoplastic material or a rubber elastic body.
JP14015886A 1986-06-18 1986-06-18 Molding tool of contact lens Granted JPS62297119A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14015886A JPS62297119A (en) 1986-06-18 1986-06-18 Molding tool of contact lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14015886A JPS62297119A (en) 1986-06-18 1986-06-18 Molding tool of contact lens

Publications (2)

Publication Number Publication Date
JPS62297119A JPS62297119A (en) 1987-12-24
JPH0544330B2 true JPH0544330B2 (en) 1993-07-06

Family

ID=15262216

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14015886A Granted JPS62297119A (en) 1986-06-18 1986-06-18 Molding tool of contact lens

Country Status (1)

Country Link
JP (1) JPS62297119A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11320571A (en) * 1998-05-15 1999-11-24 Menicon Co Ltd Mold for eye lens, its manufacture and manufacture of the lens using the mold
JP4891549B2 (en) * 2005-01-19 2012-03-07 富士フむルム株匏䌚瀟 Mold for plastic molding

Also Published As

Publication number Publication date
JPS62297119A (en) 1987-12-24

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