JPH0147308B2 - - Google Patents
Info
- Publication number
- JPH0147308B2 JPH0147308B2 JP55056789A JP5678980A JPH0147308B2 JP H0147308 B2 JPH0147308 B2 JP H0147308B2 JP 55056789 A JP55056789 A JP 55056789A JP 5678980 A JP5678980 A JP 5678980A JP H0147308 B2 JPH0147308 B2 JP H0147308B2
- Authority
- JP
- Japan
- Prior art keywords
- methacrylic resin
- light
- resin plate
- diffusing agent
- plate
- 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
Links
- 239000000113 methacrylic resin Substances 0.000 claims description 61
- 239000003795 chemical substances by application Substances 0.000 claims description 23
- 239000006188 syrup Substances 0.000 claims description 18
- 235000020357 syrup Nutrition 0.000 claims description 18
- 238000006116 polymerization reaction Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- BIJZIPJJKWEFAY-UHFFFAOYSA-N 5-(4-cyanobutyldiazenyl)-2,4-dimethylpentanenitrile Chemical compound CC(C#N)CC(CN=NCCCCC#N)C BIJZIPJJKWEFAY-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- DBCAQXHNJOFNGC-UHFFFAOYSA-N 4-bromo-1,1,1-trifluorobutane Chemical compound FC(F)(F)CCCBr DBCAQXHNJOFNGC-UHFFFAOYSA-N 0.000 description 1
- 239000004641 Diallyl-phthalate Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 1
- SYFOAKAXGNMQAX-UHFFFAOYSA-N bis(prop-2-enyl) carbonate;2-(2-hydroxyethoxy)ethanol Chemical compound OCCOCCO.C=CCOC(=O)OCC=C SYFOAKAXGNMQAX-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- -1 diallyl methacrylate Chemical compound 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Substances CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Optical Elements Other Than Lenses (AREA)
Description
【発明の詳細な説明】
本発明は、光拡散性メタクリル樹脂板の製造方
法に関する。更に詳しくは、本発明はセルの一部
として既存のメタクリル樹脂板を使用した積層重
合法により、光拡散性メタクリル樹脂板を製造す
る方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a light-diffusing methacrylic resin plate. More specifically, the present invention relates to a method of manufacturing a light-diffusing methacrylic resin plate by a layered polymerization method using an existing methacrylic resin plate as part of a cell.
メタクリル樹脂板は、その優れた透明性、加工
性により種々の用途に使用されており、背面投影
スクリーンもその一つである。これはメタクリル
樹脂板に何らかの方法で光拡散層を形成せしめ、
背面投影スクリーンとなすものである。光拡散性
を賦与する方法としては粉末ガラス、酸化チタ
ン、二酸化珪素、炭酸カルシウム等の光拡散剤お
よび着色剤にバインダーと希釈剤を加えたものを
メタクリル樹脂板等の基板の片面に塗布し、乾
燥、固化することが一般的である。背面投影スク
リーンに要求される特性としては透過性、拡散
性、解像力、コントラスト、利得（ゲイン）、反
射率などで示すことができるが、これらの値は項
目により程度の差はあるものの光拡散剤を一定品
種に定めた場合光拡散層の厚みの均一性に支配さ
れる。前記拡散剤組成物を基板に塗布する方法に
はロールコーテイングによるもの、スクリーン印
刷によるもの、吹き付けによるもなどがあるが、
拡散層の厚みを均一化するためにはいずれも多大
の労力と煩雑な工程を必要とするのが現状であ
る。また該組成物を透明または半透明の樹脂と混
合均一化し、固化して板状とすることもできるが
成形性の面から厚みが薄いものは製造することが
極めて難しい。背面投影スクリーンとしては、光
拡散層が厚く分布していると鮮明な画像が得られ
にくいのでできるだけ薄くすることが要求されて
いる。 Methacrylic resin plates are used for various purposes due to their excellent transparency and workability, and rear projection screens are one of them. This involves forming a light diffusion layer on the methacrylic resin plate in some way,
It is made with a rear projection screen. A method of imparting light diffusivity is to apply a mixture of a light diffusing agent such as powdered glass, titanium oxide, silicon dioxide, calcium carbonate, and a coloring agent to which a binder and a diluent are added to one side of a substrate such as a methacrylic resin plate. It is common to dry and solidify. The characteristics required for a rear projection screen can be expressed in terms of transparency, diffusivity, resolution, contrast, gain, reflectance, etc. Although these values vary in degree depending on the item, they are different from the light diffusing agent. When a certain type of light is determined, it is determined by the uniformity of the thickness of the light diffusion layer. Methods for applying the diffusing agent composition to the substrate include roll coating, screen printing, and spraying.
At present, in order to make the thickness of the diffusion layer uniform, a great deal of effort and complicated steps are required. It is also possible to homogenize the composition with a transparent or translucent resin and solidify it to form a plate, but it is extremely difficult to produce a thin plate from the viewpoint of moldability. A rear projection screen is required to be as thin as possible since it is difficult to obtain a clear image if the light diffusion layer is distributed thickly.
本発明は上記のような欠点を改善したものであ
つてその要旨とするところは、少なくとも一方に
メタクリル樹脂板を使用したセルの中で、光拡散
剤を含むメタクリル樹脂シロツプを、その重合の
発熱ピーク時間が60分以上となるような条件で注
型重合させ、上記メタクリル樹脂板に光拡散剤を
含有せるメタクリル樹脂の薄層を一体的に形成し
たことを特徴とする光拡散性メタクリル樹脂板の
製造方法にある。 The present invention has improved the above-mentioned drawbacks, and its gist is that a methacrylic resin syrup containing a light diffusing agent is heated in a cell using a methacrylic resin plate on at least one side of the cell, and A light-diffusing methacrylic resin plate, characterized in that a thin layer of methacrylic resin containing a light-diffusing agent is integrally formed on the methacrylic resin plate by casting polymerization under conditions such that the peak time is 60 minutes or more. It is in the manufacturing method.
本発明において使用するメタクリル樹脂板とし
ては、無色または適当に着色されたメタクリル酸
メチル重合体あるいはメタクリル酸メチル80重量
％以上と、他の共重合可能なモノエチレン性不飽
和化合物および／または多官能性化合物との共重
合体からなる透明な合成樹脂板を挙げることがで
きる。モノエチレン性不飽和化合物としては、た
とえばメタクリル酸アルキルエステル、アクリル
酸アルキルエステル、スチレン等が挙げられる。
多官能性化合物としては、たとえばエチレングリ
コールジメタクリレート、ジアリルメタクリレー
ト等のメタクリル酸エステル類、ジアリルフタレ
ート、ジエチレングリコールビスアリルカーボネ
ート等が挙げられる。 The methacrylic resin plate used in the present invention is a colorless or appropriately colored methyl methacrylate polymer or 80% by weight or more of methyl methacrylate, and other copolymerizable monoethylenically unsaturated compounds and/or polyfunctional Examples include transparent synthetic resin plates made of copolymers with chemical compounds. Examples of the monoethylenically unsaturated compound include methacrylic acid alkyl ester, acrylic acid alkyl ester, and styrene.
Examples of the polyfunctional compound include methacrylic acid esters such as ethylene glycol dimethacrylate and diallyl methacrylate, diallyl phthalate, and diethylene glycol bisallyl carbonate.
またメタクリル樹脂シロツプとしては、メタク
リル酸メチル単量体あるいはメタクリル酸メチル
を主成分とする単量体混合物から成る部分重合体
に、必要に応じ触媒その他添加剤を添加してなる
組成物を挙げることができる。シロツプの粘度と
しては2000センチポイズ以下のものが望ましい。 Examples of methacrylic resin syrup include compositions made by adding catalysts and other additives as necessary to a partial polymer consisting of methyl methacrylate monomer or a monomer mixture containing methyl methacrylate as the main component. Can be done. The viscosity of the syrup is preferably 2000 centipoise or less.
メタクリル樹脂シロツプに添加される光拡散剤
としては、メタクリル樹脂液の屈折率と異なる屈
折率を有するものであればどのようなものでもよ
いが、たとえば二酸化珪素、酸化チタン、水酸化
アルミニウム、アルミナ、酸化マグネシウム、炭
酸カルシウム等が挙げられる。光拡散剤の粒径と
しては１〜100μmの範囲、好ましくは１〜20μm
である。 The light diffusing agent added to the methacrylic resin syrup may be of any kind as long as it has a refractive index different from that of the methacrylic resin liquid, such as silicon dioxide, titanium oxide, aluminum hydroxide, alumina, Examples include magnesium oxide and calcium carbonate. The particle size of the light diffusing agent is in the range of 1 to 100 μm, preferably 1 to 20 μm.
It is.
本発明は光拡散剤を含有せるメタクリル樹脂の
薄層を、既存のメタクリル樹脂板の少なくとも一
方の面に一体的に形成させることを特徴とする光
拡散性メタクリル樹脂板の製造方法である。光拡
散剤を含有せるメタクリル樹脂板を単独に得るこ
とは可能であるが、背面投影スクリーンとして鮮
明な画像を得るには光拡散剤の厚さが２mm以下、
好ましくは0.5mm以下が望ましく、こような厚さ
の薄いメタクリル樹脂板を単独で得るには特に大
きな背面投影スクリーンの場合かなり難しい。更
には厚さの薄い光拡散板が得られたとしても強度
向上のため既存のメタクリル樹脂板等の支持板と
貼付ける必要があり、そのための加工工程が増え
ることに加えて、貼合せに伴なう欠陥を生じ易
い。本発明者らは鋭意検討の結果、少なくとも一
方にメタクリル樹脂板を使用したセルの中で光拡
散剤を含むメタクリル樹脂シロツプを、発熱のピ
ーク時間を規制して注型重合することにより、光
拡散層の薄層とメタクリル樹脂板とが一体的に形
成されてなる光拡散性メタクリル樹脂板を得るこ
とに到達した。 The present invention is a method for manufacturing a light-diffusing methacrylic resin board, which comprises integrally forming a thin layer of methacrylic resin containing a light-diffusing agent on at least one surface of an existing methacrylic resin board. Although it is possible to obtain a single methacrylic resin plate containing a light diffusing agent, in order to obtain a clear image as a rear projection screen, the thickness of the light diffusing agent must be 2 mm or less.
Preferably, the thickness is 0.5 mm or less, and it is quite difficult to obtain such a thin methacrylic resin plate alone, especially in the case of a large rear projection screen. Furthermore, even if a thin light diffusing plate is obtained, it will be necessary to attach it to an existing support plate such as a methacrylic resin plate in order to improve its strength. It is easy to cause defects. As a result of intensive studies, the inventors of the present invention found that by casting and polymerizing a methacrylic resin syrup containing a light diffusing agent in a cell using a methacrylic resin plate on at least one side while regulating the peak heat generation time, light diffusion was achieved. It has been achieved to obtain a light-diffusing methacrylic resin plate in which a thin layer and a methacrylic resin plate are integrally formed.
本発明の製造方法としては第１図に示したよう
に、片面をメタクリル樹脂板１、他の面を強化ガ
ラス、ステンレス板等の鋳型板３で構成され、両
者の周縁に塩化ビニル製等のガスケツト２を介在
して形成されたセルの中に光拡散剤を含むメタク
リル樹脂シロツプを注入し、常法に従いかつ発熱
のピーク時間を配慮して加熱重合することからな
る。また第２図に示したごとく、両面をメタクリ
ル樹脂板１で形成したセル中で光拡散剤を含むメ
タクリル樹脂シロツプ同様にして注型重合するこ
ともできる。 As shown in FIG. 1, the manufacturing method of the present invention consists of a methacrylic resin plate 1 on one side, a mold plate 3 made of tempered glass, stainless steel plate, etc. on the other side, and a mold plate 3 made of vinyl chloride etc. on the periphery of both. A methacrylic resin syrup containing a light diffusing agent is injected into a cell formed with a gasket 2 interposed therebetween, and heated and polymerized according to a conventional method while taking into consideration the peak time of heat generation. Further, as shown in FIG. 2, cast polymerization can be carried out in a cell having both sides formed of methacrylic resin plates 1 in the same manner as a methacrylic resin syrup containing a light diffusing agent.
本発明に製造方法において、光拡散剤を含むメ
タクリル樹脂シロツプを注型重合する場合その重
合条件としては、重合をゆつくりとすすめ初期重
合の発熱ピーク時間を60分以上とすることが望ま
しく、これにより拡散層の厚さを注入シロツプ厚
の半分以下にすることができることを見出した。
これは重合中にシロツプ中のモノマーがセルとし
ているメタクリル樹脂板に膨潤吸収されるためで
あり、特に光拡散剤を含有せるメタクリル樹脂層
を薄く形成するのに有効な方法である。 In the production method of the present invention, when the methacrylic resin syrup containing a light diffusing agent is cast-polymerized, the polymerization conditions are preferably such that the polymerization is carried out slowly and the exothermic peak time of the initial polymerization is 60 minutes or more. It has been found that the thickness of the diffusion layer can be made less than half the thickness of the injection syrup.
This is because the monomers in the syrup are swelled and absorbed by the methacrylic resin plates serving as cells during polymerization, and this method is particularly effective for forming a thin methacrylic resin layer containing a light diffusing agent.
このような方法によつて得られた光拡散性メタ
クリル樹脂板を示したのが、第３図ないし第５図
である。すなわち、第３図は第１図の方法で得ら
れたもので、セルの一部を構成したメタクリル樹
脂板１の片面に光拡散剤を含有せるメタクリル樹
脂の薄層１１が一体的に形成されている。また、
第４図は第２図の方法で得られたもので、両方の
メタクリル樹脂板１，１の間に光拡散剤を含有せ
るメタクリル樹脂の薄層１１が挾着された状態で
形成されてるいる。なお、第５図は第３図の状態
のメタクリル樹脂板１の反対面にも薄層１１を形
成したもので、照明器具材料などと用いられる。 FIGS. 3 to 5 show a light-diffusing methacrylic resin plate obtained by such a method. That is, FIG. 3 is obtained by the method shown in FIG. 1, in which a thin layer 11 of methacrylic resin containing a light diffusing agent is integrally formed on one side of a methacrylic resin plate 1 that constitutes a part of the cell. ing. Also,
Figure 4 shows the result obtained by the method shown in Figure 2, in which a thin layer 11 of methacrylic resin containing a light diffusing agent is sandwiched between both methacrylic resin plates 1, 1. . Incidentally, FIG. 5 shows the methacrylic resin plate 1 in the state shown in FIG. 3 with a thin layer 11 formed on the opposite side as well, and is used as a material for lighting equipment.
このようにして得た光拡散層を含むメタクリル
樹脂板に所望ならフレネル加工またはレンチキユ
ラー加工を施して背面投影スクリーンとすること
ができる。 If desired, the methacrylic resin plate containing the light diffusing layer thus obtained can be subjected to Fresnel processing or lenticular processing to form a rear projection screen.
以下実施例により本発明を具体的に説明する。 The present invention will be specifically explained below using Examples.
実施例 １
セルの材料として一方の面にガラス、他方の面
に３mm厚さの無色透明メタクリル樹脂板を用い、
間に外径2.3mmφの塩化ビニル製ガスケツトを介
在させ厚さ1.3mmとなるように調節した空間を形
成させた。この空間に下記の条件で光拡散剤含有
メタクリル樹脂シロツプを注入、重合させた。Example 1 As the material of the cell, glass was used on one side and a colorless transparent methacrylic resin plate with a thickness of 3 mm was used on the other side.
A vinyl chloride gasket with an outer diameter of 2.3 mm was interposed in between to form a space adjusted to have a thickness of 1.3 mm. A methacrylic resin syrup containing a light diffusing agent was injected into this space and polymerized under the following conditions.
＜メタクリル樹脂シロツプ組成＞
メタクリル酸メチル予備重合シロツプ（重合率
7.5％） 97.9重量部
二酸化珪素（粒径２〜4μ） 21重量部
２，４―ジメチルアゾビスバレロニトリル
60ppm
＜重合条件＞
初期重合 63℃水浴中 3.5時間
後期重合 120℃エアオーブン中 2.5時間
シロツプ粘度は425センチポイズ、初期重合の
発熱ピーク時間は135分であつた。<Methacrylic resin syrup composition> Methyl methacrylate prepolymerized syrup (polymerization rate
7.5%) 97.9 parts by weight Silicon dioxide (particle size 2-4μ) 21 parts by weight 2,4-dimethylazobisvaleronitrile
60ppm <Polymerization conditions> Initial polymerization: 3.5 hours in a water bath at 63°C Late polymerization: 2.5 hours in an air oven at 120°C The syrup viscosity was 425 centipoise, and the exothermic peak time of the initial polymerization was 135 minutes.
このようにして光拡散層の厚さ0.4mm、一体化
した樹脂板の厚さ５mmの光拡散性メタクリル樹脂
板を得た。この光学特性を測定したところ下記の
通りであつた。 In this way, a light-diffusing methacrylic resin plate with a light-diffusing layer having a thickness of 0.4 mm and an integrated resin plate having a thickness of 5 mm was obtained. The optical properties were measured and were as follows.
全光線透過率 72.9％
曇 価 91.2％
実施例 ２
両面に２mm厚の無色透明メタクリル樹脂板を用
い間に外径3.2mmφの塩化ビニル製ガスケツトを
介在させ厚さ1.9mmとなるように調節した空間を
形成させた。この空間に下記組成の光拡散剤含有
メタクリル樹脂シロツプを注入し、実施例(1)と同
じ条件で重合させた。Total light transmittance 72.9% Haze value 91.2% Example 2 A space adjusted to have a thickness of 1.9 mm by using colorless transparent methacrylic resin plates with a thickness of 2 mm on both sides and interposing a vinyl chloride gasket with an outer diameter of 3.2 mmφ between them. was formed. A light diffusing agent-containing methacrylic resin syrup having the following composition was injected into this space and polymerized under the same conditions as in Example (1).
メタクリル酸メチル予備重合シロツプ（重合率
8.5％） 98.4重量部
二酸化珪素（粒径２〜4μ） 1.6重量部
２，４―ジメチルアゾビスバレロニトリル
45ppm
シロツプ粘度は385センチポイズ、初期重合の
発熱ピーク時間は152分であつた。Methyl methacrylate prepolymerized syrup (polymerization rate
8.5%) 98.4 parts by weight Silicon dioxide (particle size 2-4μ) 1.6 parts by weight 2,4-dimethylazobisvaleronitrile
The 45 ppm syrup viscosity was 385 centipoise, and the exothermic peak time of the initial polymerization was 152 minutes.
このようにして厚さ0.7mmの光拡散層を間には
さみ、両側に各2.4mm厚味の無色透明メタクリル
樹脂部分が一体化された厚さ4.5mmの光拡散性メ
タクリル樹脂板を得た。この光学特性を測定した
ところ下記の結果を得た。 In this way, a light-diffusing methacrylic resin plate with a thickness of 4.5 mm was obtained, with a light-diffusing layer having a thickness of 0.7 mm interposed therebetween, and colorless and transparent methacrylic resin parts each having a thickness of 2.4 mm were integrated on both sides. When this optical property was measured, the following results were obtained.
全光線透過率 69.8％
曇 価 92.4％
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、既存のメタクリル樹脂板に光拡散剤を
含有させるメタクリル樹脂の薄層が強固にかつ一
体的に形成された、性能の優れた光拡散性メタク
リル樹脂板を得ることができ、しかも製造が容易
で、後工程での煩雑な接着作業を省略することが
できる等の利点を有している。Total light transmittance: 69.8% Haze value: 92.4% Since the present invention has the configuration as detailed above, the thin layer of methacrylic resin containing a light diffusing agent can be firmly and integrally formed on the existing methacrylic resin plate. It is possible to obtain a light-diffusing methacrylic resin plate with excellent performance, which is easy to manufacture, and has advantages such as being able to omit complicated bonding work in subsequent steps.
図面は本発明の実施例を示すもので、第１図は
本発明の製造方法に使用するセルの断面図、第２
図は構成例を示す同様なセルの断面図、第３図は
第１図のセルにより得られた光拡散性メタクリル
樹脂板の断面図、第４図は第２図のセルにより得
られた光拡散性メタクリル樹脂板の断面図、第５
図は更に他の例を示す光拡散性メタクリル樹脂板
の断面図である。
１……メタクリル樹脂板、１１……光拡散剤を
含有せるメタクリル樹脂の薄層、２……ガスケツ
ト、３……鋳型板。
The drawings show examples of the present invention, and FIG. 1 is a cross-sectional view of a cell used in the manufacturing method of the present invention, and FIG.
The figure is a cross-sectional view of a similar cell showing an example of its configuration, Figure 3 is a cross-sectional view of a light-diffusing methacrylic resin plate obtained by the cell shown in Figure 1, and Figure 4 is a cross-sectional view of a light-diffusing methacrylic resin plate obtained by the cell shown in Figure 2. Cross-sectional view of the diffusible methacrylic resin plate, No. 5
The figure is a sectional view of a light-diffusing methacrylic resin plate showing still another example. 1...Methacrylic resin plate, 11...Thin layer of methacrylic resin containing a light diffusing agent, 2...Gasket, 3...Mold plate.
Claims (1)
たセルの中で、光拡散剤を含むメタクリル樹脂シ
ロツプを、その初期重合の発熱ピーク時間が60分
以上となるような条件で注型重合させ、上記メタ
クリル樹脂板に光拡散剤を含有せるメタクリル樹
脂の薄層を一体的に形成したことを特徴とする光
拡散性メタクリル樹脂板の製造方法。1. In a cell using a methacrylic resin plate on at least one side, methacrylic resin syrup containing a light diffusing agent is cast-polymerized under conditions such that the initial polymerization exothermic peak time is 60 minutes or more, and the methacrylic resin A method for manufacturing a light-diffusing methacrylic resin board, characterized in that a thin layer of methacrylic resin containing a light-diffusing agent is integrally formed on the board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5678980A JPS56151560A (en) | 1980-04-28 | 1980-04-28 | Light diffusing methacrylic resin board and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5678980A JPS56151560A (en) | 1980-04-28 | 1980-04-28 | Light diffusing methacrylic resin board and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56151560A JPS56151560A (en) | 1981-11-24 |
| JPH0147308B2 true JPH0147308B2 (en) | 1989-10-13 |
Family
ID=13037175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5678980A Granted JPS56151560A (en) | 1980-04-28 | 1980-04-28 | Light diffusing methacrylic resin board and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56151560A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0447859Y2 (en) * | 1986-09-09 | 1992-11-11 | ||
| JPH02141737A (en) * | 1988-11-24 | 1990-05-31 | Canon Inc | Rear projection type screen and rear projection type image display device using it |
| JPH02221924A (en) * | 1989-02-23 | 1990-09-04 | Asahi Chem Ind Co Ltd | Light transmission plate made of methacrylic resin and its production |
| JPH02221925A (en) * | 1989-02-23 | 1990-09-04 | Asahi Chem Ind Co Ltd | Light transmission plate made of methacrylic resin and its production |
| CN101646557B (en) * | 2007-02-02 | 2013-09-18 | 阿科玛法国公司 | Multi-layer screen composites |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5013828A (en) * | 1973-04-26 | 1975-02-13 | ||
| JPS5220857A (en) * | 1975-08-11 | 1977-02-17 | Hitachi Ltd | Receiver |
| JPS541353A (en) * | 1977-06-03 | 1979-01-08 | Omron Tateisi Electronics Co | Roll paper coating machine |
| JPS5593102A (en) * | 1979-01-05 | 1980-07-15 | Mitsubishi Rayon Co Ltd | Acrylic laminated plate for high diffusion of light |
| JPS55113561A (en) * | 1979-01-30 | 1980-09-02 | Mitsubishi Rayon Co | Acryl group synthetic resin board whose inside has optical dissusing layer* and its preparation |
-
1980
- 1980-04-28 JP JP5678980A patent/JPS56151560A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5013828A (en) * | 1973-04-26 | 1975-02-13 | ||
| JPS5220857A (en) * | 1975-08-11 | 1977-02-17 | Hitachi Ltd | Receiver |
| JPS541353A (en) * | 1977-06-03 | 1979-01-08 | Omron Tateisi Electronics Co | Roll paper coating machine |
| JPS5593102A (en) * | 1979-01-05 | 1980-07-15 | Mitsubishi Rayon Co Ltd | Acrylic laminated plate for high diffusion of light |
| JPS55113561A (en) * | 1979-01-30 | 1980-09-02 | Mitsubishi Rayon Co | Acryl group synthetic resin board whose inside has optical dissusing layer* and its preparation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56151560A (en) | 1981-11-24 |
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