JPH02222902A - Manufacture of lens sheet - Google Patents
Manufacture of lens sheetInfo
- Publication number
- JPH02222902A JPH02222902A JP28815089A JP28815089A JPH02222902A JP H02222902 A JPH02222902 A JP H02222902A JP 28815089 A JP28815089 A JP 28815089A JP 28815089 A JP28815089 A JP 28815089A JP H02222902 A JPH02222902 A JP H02222902A
- Authority
- JP
- Japan
- Prior art keywords
- resin liquid
- ultraviolet
- lens
- base material
- transparent base
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000011347 resin Substances 0.000 claims abstract description 48
- 229920005989 resin Polymers 0.000 claims abstract description 48
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000003825 pressing Methods 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 16
- 230000001678 irradiating effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000001723 curing Methods 0.000 description 9
- 239000004925 Acrylic resin Substances 0.000 description 5
- 229920000178 Acrylic resin Polymers 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920005668 polycarbonate resin Polymers 0.000 description 2
- 239000004431 polycarbonate resin Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229920006353 Acrylite® Polymers 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- IAXXETNIOYFMLW-GYSYKLTISA-N [(1r,3r,4r)-4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl] 2-methylprop-2-enoate Chemical compound C1C[C@@]2(C)[C@H](OC(=O)C(=C)C)C[C@@H]1C2(C)C IAXXETNIOYFMLW-GYSYKLTISA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000009411 base construction Methods 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000004148 curcumin Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 238000000016 photochemical curing Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000011116 polymethylpentene Substances 0.000 description 1
- 229920000306 polymethylpentene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、太陽光の集光、各種光源装置あるＬ／−ｈは
透過型スクリーン等に用いられるフレネルレンズやレン
チキュラーレンズ等のレンズシートの製造方法に関する
ものである。Detailed Description of the Invention (Industrial Field of Application) The present invention is useful for concentrating sunlight and for various light source devices. This relates to a manufacturing method.
（従来の技術）
上記分野に使用されるフレネルレンズやレンチキュラー
レンズは、アクリル樹脂、ポリカーボネート樹脂、塩化
ビニル樹脂あるＩ／−ｈはスチレン樹脂等の透明樹脂材
料を用い、これをレンズ面を形成する型を備えた金型を
用いて射出成形する方法や、これよりサイズが大き込場
合には板材料をレンズ型と共に加熱、加圧して熱転写す
る方法、さらには板材料に直接切削工具によって切削す
る方法が知られている。(Prior art) Fresnel lenses and lenticular lenses used in the above fields use transparent resin materials such as acrylic resin, polycarbonate resin, vinyl chloride resin, and styrene resin to form the lens surface. There are two methods: injection molding using a mold with a mold; for larger sizes, thermal transfer by heating and pressurizing the plate material together with the lens mold; and furthermore, cutting directly into the plate material with a cutting tool. method is known.
ところが上記の方法は、概して製造装置が大規模なもの
となり、加熱や加圧操作を伴うことから製造サイクルが
長くなり、製造コストが嵩むという問題点があった。However, the above-mentioned methods generally require large-scale manufacturing equipment and involve heating and pressurizing operations, which lengthens the manufacturing cycle and increases manufacturing costs.
このため最近では、既存の樹脂材料を用い、この表面に
紫外線硬化樹脂によってレンズ部だけを形成する方法が
提案されている（特開昭５４−１５６６５１号公報、特
開昭６１−１７７２１５号公報、特開昭６２−２３８５
０２号公報参照）。For this reason, recently, a method has been proposed in which an existing resin material is used and only the lens portion is formed on the surface of the resin material using an ultraviolet curing resin (Japanese Patent Laid-Open Nos. 54-156651, 61-177215, Japanese Patent Publication No. 62-2385
(See Publication No. 02).
（発明が解決しようとする課題）
しかしながら、上記紫外線硬化型樹脂を用いてレンズリ
ートを製造する場合に問題となるのは、レンズ型と透明
基材との間に紫外線硬化型樹脂液を注入する際に発生す
る気泡を除去することが難しいことである。このため上
記先行例のうち特開昭６ｉ−１８２９０８号公開では、
紫外線硬化型樹脂液を減圧下で注入することが提案され
ているが、大きなサイズのレンズシートを製造する場合
には設備が大規模となってしまい製造コストの低減に寄
与しに〈＼なる。しか本減田下で脱泡する場合、硬化さ
せる樹脂層が相当に厚いときには効果が認められるもの
一樹脂層がレンズ部のみの如く薄くなると、その効果は
ほとんど認められなくなってしまう難点があり、本来レ
ンズ部のみを紫外線硬化型樹脂で形成して生産性を上げ
、コストを低減させると込う目的に適合しな込こととな
る。(Problem to be Solved by the Invention) However, when manufacturing a lens REET using the above-mentioned ultraviolet curable resin, there is a problem in injecting the ultraviolet curable resin liquid between the lens mold and the transparent base material. The problem is that it is difficult to remove the air bubbles that occur during this process. For this reason, among the above precedents, in JP-A No. 6i-182908,
It has been proposed to inject ultraviolet curable resin liquid under reduced pressure, but when manufacturing large-sized lens sheets, the equipment becomes large-scale, making it difficult to reduce manufacturing costs. However, when defoaming under this reduced temperature, the effect is recognized when the resin layer to be cured is quite thick, but when the resin layer becomes thin, such as only in the lens part, the effect is hardly recognized. This does not suit the original purpose of forming only the lens portion from an ultraviolet curable resin to increase productivity and reduce costs.
本発明はこのような状況に鑑み、紫外線硬化型樹脂によ
る硬化層が薄くなっても脱泡効果があり、しかも生産効
率を低下させることのない方法を提案しようとするもの
である。In view of this situation, the present invention aims to propose a method that has a defoaming effect even if the cured layer made of ultraviolet curable resin becomes thin, and does not reduce production efficiency.
（課題を解決するための手段）
すなわち本発明は、レンズ型と透明基材との間に紫外線
硬化型樹脂液を介在させ、紫外線を照射してレンズシー
トを製造する方法において、レンズ型と透明基材との間
に過剰の紫外線硬化型樹脂液を介在させて加圧し、余分
の紫外線硬化型樹脂液を側辺から漏出させたのち硬化さ
せることを特徴とするレンズシートの製造方法を要旨と
するものである。(Means for Solving the Problem) That is, the present invention provides a method for manufacturing a lens sheet by interposing an ultraviolet curable resin liquid between a lens mold and a transparent base material and irradiating the lens with ultraviolet rays. The subject matter is a method for manufacturing a lens sheet, which is characterized by interposing an excess of ultraviolet curable resin liquid between the base material and pressurizing it, allowing the excess ultraviolet curable resin liquid to leak out from the sides, and then curing. It is something to do.
以下、本発明を図面に従って説明する。The present invention will be explained below with reference to the drawings.
筑１図ないし第３図は、本発明によってフ１／ネルレン
ズシートを製造する方法の原理的な工程を示すもので、
まずフレネルレンズを形成するための型面を備えたレン
ズ型（１）を用意する。Figures 1 to 3 show the basic steps of the method for manufacturing a lens sheet according to the present invention.
First, a lens mold (1) having a mold surface for forming a Fresnel lens is prepared.
このレンズ型（１）としではアルミニウム、黄銅、鋼等
の金属板やシリコン樹脂、ウレタン樹脂、エポキシ樹脂
、フッソ樹脂ある因はポリメチルペンテン樹脂等の合成
樹脂から作られたものが用いられる。This lens type (1) is made of a metal plate such as aluminum, brass, or steel, or a synthetic resin such as silicone resin, urethane resin, epoxy resin, fluorine resin, or polymethylpentene resin.
次に、上記レンズ型（１）と略同サイズの透明基材（２
）を用意する。この透明基材（２）としては硝子板でも
よいが、一般的にはアクリル樹脂、ポリカーボネート樹
脂、塩化ビニル樹脂等の合成樹脂板、あるいはこれらの
フィルム゛ｉたはポリエステル等のフィルムが用いられ
る。Next, a transparent base material (2
). The transparent substrate (2) may be a glass plate, but generally a synthetic resin plate such as acrylic resin, polycarbonate resin, or vinyl chloride resin, or a film of these or a film of polyester or the like is used.
そＬ２てこれらレンズ型（１）と透明基材（２）との間
に紫外線硬化型樹脂液を介在させて紫外線によって硬化
させるわけであるが、本発明ではまず′ｊ４１図のよう
にレンズ型（１）の型面に、過剰の紫外線硬化型樹脂液
（３）を流し込む。このときに用いる紫外線硬化型樹脂
としては、ポリエステルアクリレート系、エポキシアク
リレート系、ポリウレタンアクリレート系等が用すられ
るが、できるだけ硬化後に透明性が高いものが望ましい
。このときの紫外線硬化型樹脂液（３）は、予め十分に
脱泡しておくことが望まし論が、第１図のように流し込
んだときに気泡が認められるときで特に粘度が低いもの
−を用いたときには、時間をおいて気泡を抜くか、レン
ズ型（１）に若干の振動を与えるようにしてもよい。L2: An ultraviolet curable resin liquid is interposed between the lens mold (1) and the transparent base material (2) and cured by ultraviolet rays.In the present invention, first, the lens mold is Pour excess ultraviolet curable resin liquid (3) onto the mold surface of (1). As the ultraviolet curable resin used at this time, polyester acrylate type, epoxy acrylate type, polyurethane acrylate type, etc. are used, but it is desirable that the resin has as high transparency as possible after curing. It is desirable that the ultraviolet curable resin liquid (3) at this time be sufficiently defoamed in advance, especially if air bubbles are observed when poured as shown in Figure 1. When using the lens mold (1), the air bubbles may be removed after a period of time, or the lens mold (1) may be slightly vibrated.
この状態になったら、次に第２図のように上方から透明
基材（２）を載せ、さらに加圧（４）すると、余分な紫
外線硬化型樹脂液（３）が側辺から漏出する。、第２図
の工程で生ずる気泡は、透明基材（２）と紫外線硬化型
樹脂液（３）の界面に生じ易いため、液の漏出とともに
流れ出ることとなるが、あ甘り急激に加圧（４）すると
、気泡がトラップされてしまうので好ましくない。この
ときの加圧（４）は周辺より中央を若干高くすることが
望ましｂｏまた透明基材（２）を載せるときは、できる
だけ静かにすることが望ましい。When this state is reached, the transparent base material (2) is then placed from above as shown in FIG. 2, and when pressure is applied (4), excess ultraviolet curable resin liquid (3) leaks out from the sides. The bubbles generated in the process shown in Figure 2 are likely to form at the interface between the transparent base material (2) and the ultraviolet curable resin liquid (3), so they will flow out as the liquid leaks. (4) This is not preferable because air bubbles will be trapped. It is desirable that the pressure (4) at this time be made slightly higher at the center than at the periphery, and when the transparent base material (2) is placed, it is desirable to be as quiet as possible.
以上の工稈度を経ることにより、紫外線硬化型樹脂液（
３）を必要最小限の量だけ介在させることができること
となり、その後第３図のように透明基材（２）上から紫
外線を照射（５）シ硬化させる。By going through the above process, the ultraviolet curing resin liquid (
3) can be interposed in the minimum necessary amount, and then, as shown in FIG. 3, the transparent substrate (2) is irradiated with ultraviolet rays (5) and cured.
硬化後に脱型してフレネルレンズを取り出すが、この方
法によって得られたフレネルレンズは、透明基材（２）
にレンズが一体的に形成されていて、しかもこの部分に
泡のない優れたものをなる。After curing, the mold is demolded and the Fresnel lens is taken out, but the Fresnel lens obtained by this method has a transparent base material (2).
The lens is integrally formed, and there are no bubbles in this area, making it an excellent product.
なおレンズ型（１）と透明基材（２）とは予め接離自在
に対設しておき、この開に紫外線硬化型樹脂液（３）を
注入後加圧してもよく、このときレンズ型（１）の周囲
にはせきとなる枠を設けることもできる。ま要素外線硬
化型樹脂液（３）は、レンズ型（１）のすべての周辺に
漏出させてもよいし、−辺だけに漏出させてもよい。な
お漏出した紫外線硬化型樹脂液（３）は、適宜回収し、
ろ過、脱泡後再使用するとよい。The lens mold (1) and the transparent base material (2) may be placed opposite each other in advance so that they can come into contact with each other, and the ultraviolet curable resin liquid (3) may be injected into this gap and then pressurized. A frame can also be provided around (1) to serve as a weir. The external radiation curable resin liquid (3) may be leaked all around the lens mold (1), or may be leaked only to the - side. The leaked ultraviolet curable resin liquid (3) should be collected as appropriate.
It is best to reuse it after filtering and defoaming.
（実施例）
以下、本発明の実施例を第４図ないし第８図忙基づいて
説明する。(Example) Hereinafter, an example of the present invention will be described based on FIGS. 4 to 8.
まず第４図に示すように、板厚２ｗｍで１，１１００Ｘ
Ｅ１００の大きさの黄銅板表面にフレネルレンズ型面を
切削したレンズ型（１）と、このレンズ型（１）を収納
しうる浅皿で一辺の枠（６Ａ）が着脱できる架台（６）
を用意し、ここにレンズ型（１）をセットした。次に紫
外線硬化型樹脂液（３）を第５図のようにはｙ３■程度
の厚さになるよう流し込んだ。このときに用いた紫外線
硬化型樹脂液（３）の組成は次の通りである。First, as shown in Figure 4, the plate thickness is 2wm and the
A lens mold (1) with a Fresnel lens type surface cut on the surface of a brass plate of E100 size, and a mount (6) with a shallow dish that can store this lens mold (1) and a one-sided frame (6A) that can be attached and detached.
was prepared, and the lens mold (1) was set there. Next, an ultraviolet curing resin liquid (3) was poured into the mold to a thickness of about y3cm as shown in FIG. The composition of the ultraviolet curable resin liquid (3) used at this time is as follows.
〇三菱レイヨン社製つレタンアクリレートｒＵＫ−６（
１３８Ｊ ６０重量俤・三菱レイヨン社製ヒ
ドロキＶエチルアクリレート「アクリエステルＨＯ」
４０重ＩＩＩ係Ｏベンゾフェノン（光硬化触媒）
３重１ｔ４（上記２つの七ツマ−の和に対して）
次に、透明基材としてレンズ型（１）とはｙ等しｂ大き
さで、厚さ３ｓ１１の透明アクリル樹脂板「アクリライ
ト◆０００ Ｊ （２）を、第６図のように静かに載せ
た。この状態と麿ったら、−辺の枠（６Ａ）を脱し、第
７図のように透明アクリル樹脂で２１を加圧し、余分の
紫外線硬化製樹脂液（３）を漏出させた。なおこのとき
枠（６Ａ）を脱した辺を着干高くすると泡が抜けやすか
った。〇Rethane acrylate rUK-6 manufactured by Mitsubishi Rayon Co., Ltd. (
138J 60 wt. Hydroxy V ethyl acrylate "Acryester HO" manufactured by Mitsubishi Rayon Co., Ltd.
40 heavy group III O benzophenone (photocuring catalyst)
3 times 1t4 (for the sum of the above two seven points) Next, as a transparent base material, a transparent acrylic resin plate "Acrylite◆ 000 J (2) was placed gently as shown in Figure 6. Once this state was reached, remove the - side frame (6A) and pressurize 21 with transparent acrylic resin as shown in Figure 7. The excess ultraviolet curing resin liquid (3) was allowed to leak out. At this time, the bubbles were easier to escape by raising the side that had escaped the frame (6A).
余分の紫外線硬化型樹脂液（３）を漏出させたのち、透
明アクリル樹脂板（２）の上方より、ＳＯＷの紫外線ラ
ンプによって紫外線を照射し、硬化させた。脱型してと
り出したところ、泡のない第８図のようなフレネルレン
ズを得るととができた。After the excess ultraviolet curable resin liquid (3) was leaked out, ultraviolet rays were irradiated from above the transparent acrylic resin plate (2) using an SOW ultraviolet lamp to cure it. When removed from the mold, a Fresnel lens without bubbles as shown in Figure 8 was obtained.
なお上記実施例におりては、フレネルレンズシートの製
造方法について説明したが、本発明はこのような例に限
定されるものではなく、レンチキュラーレンズやプライ
アイレンズ等のレンズシートを製造する方法にも適用で
きるものであり、このよう々場合には目的に合致したレ
ンズ面を形成することのできるレンズ型を用いるとよ−
６
（発明の効果）
本発明は以上詳述した如き構成からなるものであるから
、透明基材土建紫外線硬化樹脂層によって泡の発生のな
いレンズが形成された性能のよいレンズシートを効率よ
く製作することができ、しかも設備が特別に大規模とな
ることがないため生産コストが嵩むことがない等の利点
を有している。In the above embodiments, a method for manufacturing a Fresnel lens sheet has been described, but the present invention is not limited to such an example, and can be applied to a method for manufacturing a lens sheet for a lenticular lens, a pre-eye lens, etc. In such cases, it is best to use a lens mold that can form a lens surface that meets the purpose.
6 (Effects of the Invention) Since the present invention has the configuration as detailed above, it is possible to efficiently produce a lens sheet with good performance in which a bubble-free lens is formed by a transparent base construction ultraviolet curing resin layer. Moreover, it has the advantage that the production cost does not increase because the equipment does not need to be particularly large-scale.
第１図ないし第３図は本発明方法の一実施例を示す原理
的な工程を示す断面図、第４図ないし第８図は本発明の
実施例の工程を示すもので、第４図はレンズ型と架台を
示す斜視図、第５図ないし第７図は各工程の断面図、第
８図は得らレタフレネルレンズの断面図である。
（１）・・・・・レンズ型
（２）・・・・・透明基材
（３）・・・・・紫外線硬化型樹脂（液）第
霞
第
図1 to 3 are sectional views showing the principle steps of an embodiment of the method of the present invention, and FIGS. 4 to 8 are sectional views showing the steps of the embodiment of the present invention. A perspective view showing a lens mold and a pedestal, FIGS. 5 to 7 are sectional views of each step, and FIG. 8 is a sectional view of the obtained letter Fresnel lens. (1)...Lens type (2)...Transparent base material (3)...Ultraviolet curing resin (liquid) No. Kasumi diagram
Claims (1)
させ、紫外線を照射してレンズシートを製造する方法に
おいて、レンズ型と透明基材との間に過剰の紫外線硬化
型樹脂液を介在させて加圧し、余分の紫外線硬化型樹脂
液を側辺から漏出させたのち硬化させることを特徴とす
るレンズシートの製造方法。In a method of manufacturing a lens sheet by interposing an ultraviolet curable resin liquid between a lens mold and a transparent base material and irradiating it with ultraviolet rays, excessive ultraviolet curable resin liquid is placed between the lens mold and the transparent base material. A method for manufacturing a lens sheet, characterized by applying pressure to the lens sheet, causing excess ultraviolet curable resin liquid to leak out from the sides, and then curing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28815089A JPH02222902A (en) | 1988-11-07 | 1989-11-06 | Manufacture of lens sheet |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28084888 | 1988-11-07 | ||
| JP63-280848 | 1988-11-07 | ||
| JP28815089A JPH02222902A (en) | 1988-11-07 | 1989-11-06 | Manufacture of lens sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02222902A true JPH02222902A (en) | 1990-09-05 |
Family
ID=26553952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28815089A Pending JPH02222902A (en) | 1988-11-07 | 1989-11-06 | Manufacture of lens sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02222902A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7375144B2 (en) | 2005-06-16 | 2008-05-20 | Eastman Chemical Company | Abrasion resistant coatings |
-
1989
- 1989-11-06 JP JP28815089A patent/JPH02222902A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7375144B2 (en) | 2005-06-16 | 2008-05-20 | Eastman Chemical Company | Abrasion resistant coatings |
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