JPH04299329A - Production of both-side lenticular sheet - Google Patents
Production of both-side lenticular sheetInfo
- Publication number
- JPH04299329A JPH04299329A JP3089493A JP8949391A JPH04299329A JP H04299329 A JPH04299329 A JP H04299329A JP 3089493 A JP3089493 A JP 3089493A JP 8949391 A JP8949391 A JP 8949391A JP H04299329 A JPH04299329 A JP H04299329A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- thermoplastic resin
- embossing
- intermediate layer
- double
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 32
- 238000004049 embossing Methods 0.000 claims abstract description 20
- 238000001125 extrusion Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 34
- 229920000178 Acrylic resin Polymers 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
- B29C43/222—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length characterised by the shape of the surface
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- 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
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
- B29C59/046—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts for layered or coated substantially flat surfaces
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/44—Compression means for making articles of indefinite length
- B29C43/46—Rollers
- B29C2043/461—Rollers the rollers having specific surface features
- B29C2043/463—Rollers the rollers having specific surface features corrugated, patterned or embossed surface
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/25—Solid
- B29K2105/253—Preform
- B29K2105/256—Sheets, plates, blanks or films
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、大型映像機器の透過型
スクリーンなどとして利用される両面レンチキュラーシ
ートの製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a double-sided lenticular sheet used as a transmission screen for large video equipment.
【０００２】0002
【従来の技術】従来、図２に示すように両面レンチキュ
ラーシートａは、片面（入射面）に所定のピッチでレン
チキュラーレンズｂが設けられているとともに、もう一
方の面（出射面）にも前記レンチキュラーレンズｂのピ
ッチと同ピッチでレンチキュラーレンズｃが設けられて
いる。また出射面には、入射面から入射した光が出射す
る部分以外の部分に、外光の反射を防止するブラックス
トライプを設ける突条部ｄがある。そしてこの両面レン
チキュラーシートの成形は、このシートを単一熱可塑性
樹脂（例えばアクリル樹脂）の単層押出により行われて
おり、溶融状態にある樹脂を対峙した一対のエンボスロ
ールの間にシート状にして押し出し、前記エンボスロー
ルによってエンボス加工を施して得られていた。2. Description of the Related Art Conventionally, as shown in FIG. 2, a double-sided lenticular sheet a has lenticular lenses b provided at a predetermined pitch on one side (incidence surface), and also on the other surface (output surface). Lenticular lenses c are provided at the same pitch as the lenticular lenses b. Further, the output surface has a protrusion d, which is provided with a black stripe to prevent reflection of external light, in a portion other than the portion from which the light incident from the input surface is output. The double-sided lenticular sheet is formed by extruding a single layer of thermoplastic resin (for example, acrylic resin), and the molten resin is formed into a sheet between a pair of embossing rolls facing each other. It was obtained by extruding it and embossing it using the embossing roll.
【０００３】0003
【発明が解決しようとする課題】ところでエンボス加工
によって得られる断面形状を深くシャープなものにしよ
うとする場合、できるだけ粘度の小さい熱可塑性樹脂を
用いる必要がある。しかしながら、上記単層の両面レン
チキュラーシートのエンボス押出成型に際しては、粘度
の小さい熱可塑性樹脂を用いると溶融シートが垂れ易く
加工上の安定性が悪くなる。よって粘度の小さい熱可塑
性樹脂を用いることができず熱可塑性樹脂の粘度に限界
があり、エンボス加工による断面形状も深くシャープな
ものにならないという問題があった。（なお、特開昭５
７−１９６６７１号において粘性の異なる二層シートの
一方の片面にレンチキュラーレンズ、他方の片面にフレ
ネルレンズを形成したシートが示されている。）[Problems to be Solved by the Invention] When attempting to make the cross-sectional shape obtained by embossing deep and sharp, it is necessary to use a thermoplastic resin with as low a viscosity as possible. However, when embossing and extruding the single-layer double-sided lenticular sheet, if a thermoplastic resin with a low viscosity is used, the molten sheet tends to sag, resulting in poor processing stability. Therefore, a thermoplastic resin having a low viscosity cannot be used, and there is a limit to the viscosity of the thermoplastic resin, and there is a problem that the cross-sectional shape cannot be deep and sharp by embossing. (In addition, JP-A No. 5
No. 7-196671 discloses a sheet in which a lenticular lens is formed on one side of a two-layer sheet having different viscosities, and a Fresnel lens is formed on the other side. )
【００
０４】そこで本発明は、上記した事情に鑑み、エンボス
押出成形によって表裏両面の断面形状を深くシャープな
ものとすることを課題とし、断面形状が良好な両面レン
チキュラーシートの生産性を向上させることを目的とす
る。00
[04] In view of the above-mentioned circumstances, the present invention aims to make the cross-sectional shape of both the front and back sides deep and sharp by embossing extrusion molding, and to improve the productivity of double-sided lenticular sheets with good cross-sectional shapes. purpose.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記した課題
を考慮してなされたもので、両面にレンチキュラーレン
ズを有した両面レンチキュラーシートにおいて、シート
の中間層となる熱可塑性樹脂と、該中間層の熱可塑性樹
脂より粘度が小さくシートの外層となる熱可塑性樹脂と
を多層押出して、溶融シートの前記粘度の小さい熱可塑
性樹脂からなる外層それぞれに、エンボスロールにより
所望のレンチキュラーレンズ形状のエンボス加工を施し
て両面レンチキュラーシートを多層押出成形することを
特徴とする両面レンチキュラーシートの製造方法を提供
して、上記した課題を解消するものである。[Means for Solving the Problems] The present invention has been made in consideration of the above-mentioned problems, and provides a double-sided lenticular sheet having lenticular lenses on both sides. A thermoplastic resin having a lower viscosity than the thermoplastic resin of the layer and forming the outer layer of the sheet is extruded into multiple layers, and each of the outer layers of the molten sheet made of the thermoplastic resin having a lower viscosity is embossed with a desired lenticular lens shape using an embossing roll. The above-mentioned problems are solved by providing a method for manufacturing a double-sided lenticular sheet, which is characterized by performing multilayer extrusion molding of a double-sided lenticular sheet.
【０００６】[0006]
【作用】本発明においては、外層それぞれの粘度の小さ
い熱可塑性樹脂にレンチキュラーレンズなどエンボス形
状がエンボスロールにより形成され、そして外層の樹脂
より粘度の大きい熱可塑性樹脂による中間層が芯となっ
て溶融シート全体を支持するようになる。すなわち両面
がエンボス加工し易くなった溶融シートがエンボスロー
ル間に送り出され、このエンボスロールにより両面にエ
ンボス加工が施されるようになる。[Operation] In the present invention, an embossed shape such as a lenticular lens is formed on the thermoplastic resin having a low viscosity in each of the outer layers using an embossing roll, and the intermediate layer made of a thermoplastic resin having a higher viscosity than the resin in the outer layer serves as a core and melts. It supports the entire seat. That is, the molten sheet whose both sides are easily embossed is sent between embossing rolls, and the embossing rolls embossing both sides.
【０００７】[0007]
【実施例】つぎに、本発明を図１に示す実施例に基づい
て詳細に説明する。Ｔダイ１は多層押出を行うもので、
このＴダイ１から中間層２とこの中間層２の両面に外層
３を配置した三層の積層状態となった溶融シート４が押
し出される。この外層３と中間層２とを形成する熱可塑
性樹脂それぞれは、中間層２を形成する熱可塑性樹脂の
粘度より外層３を形成する熱可塑性樹脂の粘度が小さく
設定されている。例えば前記中間層２を形成する熱可塑
性樹脂を無色透明のアクリル樹脂とし、外層３それぞれ
を形成する熱可塑性樹脂は同一として中間層２の熱可塑
性樹脂より粘度が小さい無色透明のアクリル樹脂が採用
できる。[Embodiment] Next, the present invention will be explained in detail based on the embodiment shown in FIG. T-die 1 performs multilayer extrusion,
A molten sheet 4 is extruded from the T-die 1 in a three-layer stacked state with an intermediate layer 2 and outer layers 3 disposed on both sides of the intermediate layer 2. The viscosity of the thermoplastic resin forming the outer layer 3 and the intermediate layer 2 is set to be smaller than the viscosity of the thermoplastic resin forming the intermediate layer 2. For example, the thermoplastic resin forming the intermediate layer 2 can be a colorless and transparent acrylic resin, and the thermoplastic resins forming each of the outer layers 3 can be made of the same colorless and transparent acrylic resin having a lower viscosity than the thermoplastic resin of the intermediate layer 2. .
【０００８】そしてＴダイ１から押し出された溶融シー
ト４はすぐに対峙する一対のエンボスロール５，５の間
に入り、この両エンボスロール５，５によって外層３の
熱可塑性樹脂がエンボス加工され、前記中間層２を芯と
したこの溶融シート４が冷却ロール６などを経て固化す
ることによって、外層３それぞれにレンチキュラーレン
ズ（片面側はレンチキュラーレンズと突条部を設ける場
合もある）を有した両面レンチキュラーシートが成型さ
れる。The molten sheet 4 extruded from the T-die 1 immediately enters between a pair of embossing rolls 5, 5 facing each other, and the thermoplastic resin of the outer layer 3 is embossed by these embossing rolls 5, 5. This molten sheet 4 with the intermediate layer 2 as a core is solidified by passing through a cooling roll 6, etc., thereby forming both sides with a lenticular lens on each outer layer 3 (one side may have a lenticular lens and a protrusion). A lenticular sheet is molded.
【０００９】上述した実施例にあっては外層を形成する
熱可塑性樹脂を同一のものとしたが、中間層の熱可塑性
樹脂に対してその粘度が小さいならば、外層を形成する
熱可塑性樹脂それぞれの粘度を、外層の断面形状に応じ
て異なるようにしてもよい。また外層、中間層の熱可塑
性樹脂は上述したアクリル樹脂に限定されるものではな
い。In the above embodiment, the thermoplastic resins forming the outer layer are the same, but if the viscosity is lower than that of the thermoplastic resin of the intermediate layer, the thermoplastic resins forming the outer layer may be different from each other. The viscosity of the outer layer may be varied depending on the cross-sectional shape of the outer layer. Further, the thermoplastic resin of the outer layer and the intermediate layer is not limited to the above-mentioned acrylic resin.
【００１０】0010
【発明の効果】以上説明したように、本発明によれば、
両面にレンチキュラーレンズを有した両面レンチキュラ
ーシートを製造するに当たり、シートの中間層となる熱
可塑性樹脂と、該中間層の熱可塑性樹脂より粘度が小さ
くシートの外層となる熱可塑性樹脂とを多層押出して、
溶融シートの前記粘度の小さい熱可塑性樹脂からなる外
層それぞれに、エンボスロールにより所望のレンチキュ
ラーレンズ形状のエンボス加工を施して両面レンチキュ
ラーシートを成形するので、中間層が芯となって溶融シ
ートに垂れを生じさせることなくこの溶融シートを冷却
工程などへ移動させることができて、加工上の安定性が
高まり、またエンボス加工を施す両外層の熱可塑性樹脂
の粘度が小さく、エンボス（レンチキュラーレンズや突
条部）の形状が深くシャープなものになり、光学的特性
に優れた両面レンチキュラーシートが得られるなど、実
用性に優れた効果を奏するものである。[Effects of the Invention] As explained above, according to the present invention,
In manufacturing a double-sided lenticular sheet with lenticular lenses on both sides, a thermoplastic resin that forms the intermediate layer of the sheet and a thermoplastic resin that has a lower viscosity than the thermoplastic resin of the intermediate layer and that forms the outer layer of the sheet are extruded into multiple layers. ,
Each of the outer layers of the molten sheet made of the low-viscosity thermoplastic resin is embossed in the desired lenticular lens shape using an embossing roll to form a double-sided lenticular sheet, so the middle layer acts as a core to prevent sag on the molten sheet. This molten sheet can be transferred to the cooling process etc. without causing any embossment, which increases processing stability.Also, the viscosity of the thermoplastic resin of both outer layers to be embossed is low, making it possible to transfer the molten sheet to the cooling process etc. The shape of the part) becomes deep and sharp, and a double-sided lenticular sheet with excellent optical properties can be obtained, resulting in excellent practical effects.
【図１】本発明に係る両面レンチキュラーシートの製造
方法の一実施例を示す説明図である。FIG. 1 is an explanatory diagram showing an embodiment of a method for manufacturing a double-sided lenticular sheet according to the present invention.
【図２】両面レンチキュラーシートを示す説明図である
。FIG. 2 is an explanatory diagram showing a double-sided lenticular sheet.
１…Ｔダイ ２…中間層 ３…外層 ４…溶融シート ５…エンボスロール ６…冷却ロール 1...T die 2...middle class 3...Outer layer 4...Melting sheet 5... Emboss roll 6...Cooling roll
Claims (1)
レンチキュラーシートにおいて、シートの中間層となる
熱可塑性樹脂と、該中間層の熱可塑性樹脂より粘度が小
さくシートの外層となる熱可塑性樹脂とを多層押出して
、溶融シートの前記粘度の小さい熱可塑性樹脂からなる
外層それぞれに、エンボスロールにより所望のレンチキ
ュラーレンズ形状のエンボス加工を施して両面レンチキ
ュラーシートを成形することを特徴とする両面レンチキ
ュラーシートの製造方法。[Claim 1] A double-sided lenticular sheet having lenticular lenses on both sides, comprising a thermoplastic resin as an intermediate layer of the sheet and a thermoplastic resin as an outer layer of the sheet having a lower viscosity than the thermoplastic resin of the intermediate layer. A method for producing a double-sided lenticular sheet, which comprises extruding and embossing each of the outer layers of the molten sheet made of the low-viscosity thermoplastic resin with a desired lenticular lens shape using an embossing roll to form a double-sided lenticular sheet. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08949391A JP3158476B2 (en) | 1991-03-28 | 1991-03-28 | Method for manufacturing double-sided lenticular sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08949391A JP3158476B2 (en) | 1991-03-28 | 1991-03-28 | Method for manufacturing double-sided lenticular sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04299329A true JPH04299329A (en) | 1992-10-22 |
| JP3158476B2 JP3158476B2 (en) | 2001-04-23 |
Family
ID=13972283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08949391A Expired - Fee Related JP3158476B2 (en) | 1991-03-28 | 1991-03-28 | Method for manufacturing double-sided lenticular sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3158476B2 (en) |
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| CN110722759B (en) * | 2019-10-26 | 2022-06-07 | 重庆融豪太视科技有限公司 | Preparation method of projection screen plate |
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1991
- 1991-03-28 JP JP08949391A patent/JP3158476B2/en not_active Expired - Fee Related
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