JPH11179777A - Resin sheet, manufacture thereof and device - Google Patents
Resin sheet, manufacture thereof and deviceInfo
- Publication number
- JPH11179777A JPH11179777A JP9349247A JP34924797A JPH11179777A JP H11179777 A JPH11179777 A JP H11179777A JP 9349247 A JP9349247 A JP 9349247A JP 34924797 A JP34924797 A JP 34924797A JP H11179777 A JPH11179777 A JP H11179777A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- flow
- resin layer
- composite
- sheet
- 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
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、道路標識、照明看
板、案内板、液晶表示装置、採光窓等の導光性シート、
光変角性シートの他、照明器具等の光拡散性シートや、
深み感や立体感を付与した特殊意匠性シート等の多様な
目的及び用途に適用可能な樹脂シートと、これらのシー
トを製造する装置及び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 light guide sheet such as a road sign, a lighting sign, a guide plate, a liquid crystal display, a lighting window, and the like.
In addition to the light bending sheet, light diffusion sheets such as lighting equipment,
The present invention relates to a resin sheet applicable to various purposes and uses, such as a specially designed sheet imparted with a sense of depth and a three-dimensional effect, and an apparatus and a method for manufacturing these sheets.
【０００２】[0002]
【従来の技術】従来から、透明層と遮光層が交互に積層
されたシート（特開昭５０ー２６８８５）や、上層と下
層の積層面がほぼ三角状の２層構造の樹脂シート（特開
平７ー３１８７０９）等が提案されている。これらのシ
ートは、視界制御性や、光制御性等の光学特性を有して
いるけれども、透明な樹脂シート中に異なる樹脂からな
る扁平形状の複数の樹脂条と、凹凸形状を有する異種の
樹脂の積層界面とが同一のシート中に一体化成形され、
特殊な光学特性が発現された樹脂シートは未だ知られて
いない。2. Description of the Related Art Conventionally, a sheet in which transparent layers and light-shielding layers are alternately laminated (Japanese Patent Application Laid-Open No. 50-26885) and a resin sheet having a two-layer structure in which the upper and lower layers have a substantially triangular laminated surface (Japanese Patent Application Laid-Open No. 7-318709) has been proposed. These sheets have optical characteristics such as visibility control and light control, but a plurality of flat resin strips made of different resins in a transparent resin sheet, and a different kind of resin having an uneven shape. And the lamination interface are integrally molded in the same sheet,
A resin sheet exhibiting special optical characteristics has not yet been known.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、かかる状況
に鑑みてなされたものであり、シートの透明性及び耐久
性に優れ、新規な導光性、光変角性、光制御性等の諸機
能が具現化され、かつ、外観が良好な樹脂シートを提供
しようとするものである。また、本発明は、かかる樹脂
シートを熱可塑性樹脂の共押出成形により極めて簡便に
製造することを可能にする装置及び方法を提供しようと
するものである。DISCLOSURE OF THE INVENTION The present invention has been made in view of such circumstances, and has excellent transparency and durability of a sheet, and has novel light guiding properties, optical goniotropy, and light controllability. An object is to provide a resin sheet in which various functions are realized and the appearance is good. Another object of the present invention is to provide an apparatus and a method capable of manufacturing such a resin sheet extremely simply by coextrusion molding of a thermoplastic resin.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記課題を解
決するため、透明な樹脂層Ａと透明な樹脂層Ｃによって
透明な樹脂層Ｂが挟まれた積層構造を有する外表面が平
滑な樹脂シートであって、隣接する樹脂層の樹脂の屈折
率が異なり、シートの巾方向をＸ、厚み方向をＹ、そし
て長さ方向をＺとした場合に、ＸＹ平面で表される断面
において、樹脂層Ａ中に扁平形状の複数の樹脂条Ｊが埋
設され、かつ樹脂層Ｂと樹脂層Ｃの境界面が凹凸形状を
有していることを特徴とする樹脂シートを提供する。In order to solve the above-mentioned problems, the present invention has a smooth outer surface having a laminated structure in which a transparent resin layer B is sandwiched between a transparent resin layer A and a transparent resin layer C. In a resin sheet, when the refractive index of the resin of the adjacent resin layer is different, and the width direction of the sheet is X, the thickness direction is Y, and the length direction is Z, in a cross section represented by an XY plane, A resin sheet characterized in that a plurality of flat resin strips J are embedded in a resin layer A, and a boundary surface between a resin layer B and a resin layer C has an uneven shape.
【０００５】本発明は、また、ｘ方向に所定の巾、ｙ方
向に所定の厚み、そしてｚ方向に所定の長さを有し、ｚ
方向の一端に複合樹脂流形成部（２２）、及び他端に複
合樹脂流出口（２３）を有する複合樹脂流路（２１）内
の複合樹脂流形成部（２２）において、樹脂条Ｊ用樹脂
をｚ方向に向かって流出させるための複数の流路（３
１）、及びｘｚ平面の両側から複合樹脂流形成部（２
２）に向けて樹脂層Ａ用樹脂を流出させるための２列の
流路（３５、３６）を含み、複数の樹脂条Ｊ用樹脂の流
路（３１）はｘ方向に所定の間隔をもって配置され、樹
脂層Ａ用樹脂の流路（３５、３６）のｘｚ断面はｚ方向
の高さが大きい部分Ｒｎ及びＬｎと、ｚ方向の高さが小
さい（零を含む）部分Ｒｍ及びＬｍとが交互に配置され
た形状を有し、複合樹脂流形成部（２２）と複合樹脂流
出口（２３）との間の複合樹脂流路（２１）に向けて、
樹脂層Ｂ用樹脂を流出させるスリット状の流路（５１）
と、ｚ方向の下流側に樹脂層Ｃ用樹脂を流出させるため
の流路（５２）とを具備し、流路（５２）のｘｚ断面は
ｚ方向の高さが大きい部分ＲＲｎと、ｚ方向の高さが小
さい（零を含む）部分ＲＲｍとが交互に配置されている
ことを特徴とする樹脂シートの製造装置を提供する。The present invention also has a predetermined width in the x direction, a predetermined thickness in the y direction, and a predetermined length in the z direction.
In the composite resin flow forming portion (22) having a composite resin flow forming portion (22) at one end in the direction and a composite resin outlet (23) at the other end, the resin for resin strip J is formed. Flow paths (3) for causing
1) and a composite resin flow forming section (2) from both sides of the xz plane.
It includes two rows of flow paths (35, 36) for allowing the resin for the resin layer A to flow out toward 2), and the flow paths (31) for the plurality of resin strips J are arranged at predetermined intervals in the x direction. The xz cross section of the flow path (35, 36) of the resin for the resin layer A has portions Rn and Ln having a large height in the z direction and portions Rm and Lm having a small height (including zero) in the z direction. It has an alternately arranged shape, and toward the composite resin flow path (21) between the composite resin flow forming part (22) and the composite resin outlet (23),
Slit-shaped flow path (51) for allowing resin for resin layer B to flow out
And a flow path (52) for allowing the resin for the resin layer C to flow out on the downstream side in the z direction. The xz cross section of the flow path (52) has a portion RRn having a large height in the z direction, and a z direction. And a part RRm having a small height (including zero) is alternately arranged.
【０００６】本発明は、さらに、上記の装置を用い、樹
脂層Ａ用樹脂を流路（３５、３６）から、また樹脂条Ｊ
用樹脂を流路（３１）から複合樹脂流形成部（２２）に
流出させ、次に樹脂層Ｂ用樹脂を流路（５１）から、さ
らに樹脂層Ｃ用樹脂を流路（５２）から、複合樹脂流路
（２１）に流出させて複合樹脂流を形成し、複合樹脂流
出口（２３）から溶融状態の樹脂シートとして押し出
し、この溶融状態の樹脂シートを、少なくとも一対の成
形ロール間に挟み込み、樹脂シートの一方の面と成形ロ
ールとの間に溶融樹脂の溜まりを形成しつつ押出成形す
ることを特徴とする樹脂シートの製造方法を提供する。According to the present invention, the resin for the resin layer A is supplied from the channels (35, 36) by using the above-described apparatus.
The resin for flow is caused to flow out of the flow path (31) to the composite resin flow forming section (22), and then the resin for the resin layer B is discharged from the flow path (51), and the resin for the resin layer C is discharged from the flow path (52). A composite resin flow is formed by flowing out to the composite resin flow path (21), and is extruded as a molten resin sheet from the composite resin outlet (23), and the molten resin sheet is sandwiched between at least a pair of forming rolls. And a method for producing a resin sheet, characterized in that the resin sheet is extruded while forming a pool of molten resin between one surface of the resin sheet and a forming roll.
【０００７】本発明は、また、ｘ方向に所定の巾、ｙ方
向に所定の厚み、そしてｚ方向に所定の長さを有し、ｚ
方向の一端に複合樹脂流形成部（２２）、及び他端に複
合樹脂流出口（２３）を有する複合樹脂流路（２１）
と、複合樹脂流形成部（２２）のｘｙ平面に面して配置
された樹脂条Ｊ用の複数列のスリット状の流路（４１）
と、樹脂層Ａ用の複数列のスリット状の流路（４５）と
を含み、スリット状の流路（４１）及び流路（４５）は
ｙ方向に平行にもしくはｙ方向と所定の角度をもってそ
れぞれが交互に配置され、複合樹脂流形成部（２２）に
おいて、樹脂条Ｊ用樹脂流路（４１）のｙ方向への投影
長さｖが、樹脂層Ａ用樹脂流路（４５）のｙ方向への投
影長さｑより短く、複合樹脂流形成部（２２）と複合樹
脂流出口（２３）との間の複合樹脂流路（２１）に向け
て、樹脂層Ｂ用樹脂を流入させるスリット状の流路（５
１）と、ｚ方向の下流側に樹脂層Ｃ用樹脂を流出させる
ための流路（５２）とを具備し、流路（５２）のｘｚ断
面はｚ方向の高さが大きい部分ＲＲｎと、ｚ方向の高さ
が小さい（零を含む）部分ＲＲｍとが交互に配置されて
いることを特徴とする樹脂シートの製造装置を提供す
る。The present invention also has a predetermined width in the x direction, a predetermined thickness in the y direction, and a predetermined length in the z direction.
A composite resin flow path (21) having a composite resin flow forming part (22) at one end in the direction and a composite resin outlet (23) at the other end.
And a plurality of rows of slit-shaped flow paths (41) for the resin strip J arranged facing the xy plane of the composite resin flow forming section (22).
And a plurality of rows of slit-shaped flow paths (45) for the resin layer A, wherein the slit-shaped flow paths (41) and the flow paths (45) are parallel to the y-direction or at a predetermined angle to the y-direction. Each of them is alternately arranged, and in the composite resin flow forming section (22), the projected length v of the resin flow path for resin strip J in the y direction is set to y of the resin flow path for resin layer A (45). A slit that is shorter than the projection length q in the direction and that allows the resin for the resin layer B to flow toward the composite resin flow path (21) between the composite resin flow forming part (22) and the composite resin outlet (23). Flow path (5
1), and a flow path (52) for allowing the resin for the resin layer C to flow out on the downstream side in the z direction. The xz cross section of the flow path (52) has a portion RRn having a large height in the z direction. Provided is a resin sheet manufacturing apparatus, wherein portions RRm having a small height (including zero) in the z direction are alternately arranged.
【０００８】本発明は、さらに、上記の装置を用い、樹
脂層Ａ用樹脂を流路（４５）から、また樹脂条Ｊ用樹脂
を流路（４１）から複合樹脂流形成部（２２）に流出さ
せ、次に樹脂層Ｂ用樹脂を流路（５１）から、さらに樹
脂層Ｃ用樹脂を流路（５２）から、複合樹脂流路（２
１）に流出させて複合樹脂流を形成し、複合樹脂流出口
（２３）から溶融状態の樹脂シートとして押し出し、こ
の溶融状態の樹脂シートを、少なくとも一対の成形ロー
ル間に挟み込み、樹脂シートの一方の面と成形ロールと
の間に溶融樹脂の溜まりを形成しつつ押出成形すること
を特徴とする樹脂シートの製造方法を提供する。In the present invention, the resin for the resin layer A is supplied from the channel (45) and the resin for the resin strip J is supplied from the channel (41) to the composite resin flow forming section (22) by using the above apparatus. The resin for the resin layer B is then discharged from the flow path (51), and the resin for the resin layer C is discharged from the flow path (52).
1) to form a composite resin flow, extruded as a molten resin sheet from the composite resin outlet (23), and sandwiched the molten resin sheet between at least a pair of forming rolls. The present invention provides a method for producing a resin sheet, characterized by performing extrusion molding while forming a pool of molten resin between a surface of the resin sheet and a molding roll.
【０００９】[0009]
【発明の実施の形態】以下、本発明を図面を参照しなが
ら説明する。図１（イ）〜（ハ）は、それぞれ、本発明
の樹脂シートの一例を示す断面図であり、長さ方向のＺ
方向に直角なＸＹ平面の部分断面図である。まず、本発
明の樹脂シートを製造する装置及び方法について説明す
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIGS. 1A to 1C are cross-sectional views each showing an example of the resin sheet of the present invention.
It is a partial sectional view of the XY plane perpendicular to the direction. First, an apparatus and a method for manufacturing the resin sheet of the present invention will be described.
【００１０】樹脂層Ａ中に扁平形状の樹脂条Ｊが埋設さ
れた樹脂シートは、特開平８−１４２１４９号公報や特
願平８−１２４９５９号に示される装置及び方法によっ
て製造可能である。本発明の装置及び方法の特徴は、図
２に示されるように、上記した従来の装置及び方法に含
まれる複合樹脂流形成部２２と複合樹脂流出口２３との
間の複合樹脂流路２１に向けて、樹脂層Ｂ用樹脂を流出
させるスリット状の流路５１と、さらにｚ方向の下流側
に樹脂層Ｃ用樹脂を流出させるための流路５２とを具備
した点にある。A resin sheet in which a flat resin strip J is embedded in a resin layer A can be manufactured by an apparatus and a method disclosed in Japanese Patent Application Laid-Open No. 8-142149 and Japanese Patent Application No. 8-124959. The feature of the apparatus and method of the present invention is that, as shown in FIG. 2, the composite resin flow path 21 between the composite resin flow forming section 22 and the composite resin outlet 23 included in the conventional apparatus and method described above is provided. To this end, a slit-shaped flow path 51 for flowing out the resin for the resin layer B and a flow path 52 for flowing out the resin for the resin layer C are further provided on the downstream side in the z direction.
【００１１】流路５１はｘｚ断面において巾方向に均一
なスリット状をなしており、これにより平板条の樹脂層
Ｂが形成される。流路５２のｘｚ断面はｚ方向の高さが
大きい部分ＲＲｎと、ｚ方向の高さが小さい（零を含
む）部分ＲＲｍとが交互に配置されており、この流路か
ら樹脂層Ｃ用樹脂を流出させれば、樹脂層Ｂ用樹脂と樹
脂層Ｃの流動の作用によって、樹脂層Ｂと樹脂層Ｃの界
面は変形し、図１に示すような凹凸形状が積層界面に形
成される。The flow path 51 has a uniform slit shape in the width direction in the xz section, thereby forming a flat resin layer B. In the xz cross section of the flow channel 52, portions RRn having a large height in the z direction and portions RRm having a small height (including zero) in the z direction are alternately arranged. Is caused to flow, the interface between the resin layer B and the resin layer C is deformed by the action of the flow of the resin for the resin layer B and the resin layer C, and an uneven shape as shown in FIG.
【００１２】そして、図９に示されるように口金装置６
の複合樹脂流出口２３より流出した溶融状態の樹脂シー
トを、少なくとも一対の成形ロール間に挟み込み、樹脂
シート３７の一方の面と成形ロール１０との間に溶融樹
脂の溜まり３８を形成しつつ押出成形することにより、
表面平滑でつや付けされた樹脂シートが得られる。次
に、前述の装置及び方法によって製造することのできる
本発明の樹脂シートについて説明する。[0012] Then, as shown in FIG.
The molten resin sheet flowing out of the composite resin outlet 23 is sandwiched between at least a pair of forming rolls, and extruded while forming a pool 38 of molten resin between one surface of the resin sheet 37 and the forming roll 10. By molding
A smooth and glossy resin sheet is obtained. Next, the resin sheet of the present invention that can be manufactured by the above-described apparatus and method will be described.
【００１３】本発明の樹脂シートの特徴は、樹脂層Ａ内
に扁平形状の複数の樹脂条Ｊを埋設し、かつ、異種の樹
脂層Ｂ及び樹脂層Ｃの界面を凹凸形状に形成している点
にある。このような構成を有する本発明の樹脂シートに
よって付与される機能の一例として、特殊な導光性が挙
げられる。例えば、異なる屈折率を有する樹脂層Ｂと樹
脂層Ｃとの積層界面を凹凸形状とすることにより、導光
性や光変角性が付与される。また、樹脂層Ａ中の扁平形
状の樹脂条Ｊの表面での光の反射を利用することによ
り、出射光の進行方向を制御することができる。すなわ
ち、これらの機能を組み合わせ、樹脂条Ｊを埋設する角
度を調節することにより、樹脂層Ａ表面から空気中に出
射する光の進行方向をシート面に対する法線方向を含め
て任意に制御することが可能となるので、得られるシー
トは特殊な導光性シートや光変角性シートとして極めて
有用であり、交通標識や照明看板その他の用途に用いる
ことができる。The resin sheet of the present invention is characterized in that a plurality of flat resin strips J are buried in a resin layer A, and an interface between different kinds of resin layers B and C is formed in an uneven shape. On the point. As an example of the function provided by the resin sheet of the present invention having such a configuration, special light guide properties can be given. For example, by forming the lamination interface between the resin layer B and the resin layer C having different refractive indices into an uneven shape, light guiding property and optical goniotropy are imparted. Further, by utilizing the reflection of light on the surface of the flat resin strip J in the resin layer A, the traveling direction of the emitted light can be controlled. That is, by combining these functions and adjusting the angle at which the resin strip J is embedded, it is possible to arbitrarily control the traveling direction of light emitted from the surface of the resin layer A into the air, including the normal direction to the sheet surface. Thus, the obtained sheet is extremely useful as a special light guide sheet or a photo-deflection sheet, and can be used for traffic signs, lighting signs, and other uses.
【００１４】また、樹脂条Ｊに遮光性を付与し、凹凸界
面が形成された方の面から散乱光を入射させた場合に
は、凹凸界面による光拡散効果と、遮光性樹脂条による
視界制御効果により、ランプのイメージが隠蔽され、か
つ、一定の方向のみを照射することができる特殊な照明
カバーとして有用である。扁平形状の樹脂条Ｊの埋設形
状は、図１にその一例を示す如く、様々な配列とするこ
とが可能であり、シート表面に対する角度も自由に設定
できる。Further, when the resin strip J is provided with a light-shielding property and scattered light is incident from the surface on which the uneven interface is formed, the light diffusion effect by the uneven interface and the visibility control by the light-shielding resin strip are obtained. The effect conceals the image of the lamp and is useful as a special lighting cover that can illuminate only in a certain direction. The embedding shape of the flat resin strip J can be variously arranged as shown in an example in FIG. 1, and the angle with respect to the sheet surface can be freely set.
【００１５】樹脂層Ｂと樹脂層Ｃの間の界面の凹凸形状
は、図１に示す如く、折線状、鋸刃状等の直線形状、半
円状、半楕円状、波形状、ｎ次の放物線状、１／ｎ次の
放物線状等の様々な曲線形状をとることができる。樹脂
条Ｊの配列ピッチｐ１は自由に選択することができる。
また、凹凸形状の繰り返しピッチｐ２や、高さｈとピッ
チｐ２の比ｈ／ｐ２についても自由に選択することがで
きる。これらの値は１つのシートにおいても変更可能で
ある。As shown in FIG. 1, the concavo-convex shape of the interface between the resin layer B and the resin layer C is linear, semi-circular, semi-elliptical, wavy, n-th order, etc. Various curved shapes such as a parabolic shape and a 1 / n-order parabolic shape can be adopted. The arrangement pitch p1 of the resin strip J can be freely selected.
Also, the repetition pitch p2 of the uneven shape and the ratio h / p2 of the height h to the pitch p2 can be freely selected. These values can be changed even in one sheet.
【００１６】本発明に適用可能な樹脂層Ａ用の樹脂及び
樹脂層Ｃ用の樹脂としては、広範な熱可塑性樹脂を用い
ることができ、例えば、ポリエチレンテレフタレート、
ポリ塩化ビニル、ポリスチレン、ポリカーボネート、ポ
リメチルメタクリレートに代表される各種のアクリル系
樹脂、非晶質ポリオレフィン、ポリアミド、ポリメチル
ペンテン、これらの共重合樹脂、ブレンド樹脂等が挙げ
られる。透明性、耐候性等が特に要求される場合にはア
クリル系樹脂が好ましく、特にポリメチルメタクリレー
トが最も好ましい材料といえる。As the resin for the resin layer A and the resin for the resin layer C applicable to the present invention, a wide range of thermoplastic resins can be used, for example, polyethylene terephthalate,
Examples include various acrylic resins represented by polyvinyl chloride, polystyrene, polycarbonate, and polymethyl methacrylate, amorphous polyolefins, polyamides, polymethylpentene, copolymer resins thereof, and blend resins. When transparency, weather resistance and the like are particularly required, an acrylic resin is preferable, and polymethyl methacrylate is the most preferable material.
【００１７】また、樹脂層Ｂ用の樹脂としては前記の樹
脂が同様に使用可能であり、これらは樹脂層Ａとの屈折
率差や密着性を勘案して適宜に選ぶことができる。本発
明の樹脂シートを導光性シートとして用いる場合には、
凹凸界面を挟んで隣接する樹脂層の屈折率差は０．０３
〜０．３であることが好ましい。樹脂層Ａ用樹脂と樹脂
層Ｃ用樹脂を同じものにすることもできる。As the resin for the resin layer B, the above-mentioned resins can be similarly used, and these can be appropriately selected in consideration of the difference in refractive index from the resin layer A and adhesion. When using the resin sheet of the present invention as a light guide sheet,
The difference in refractive index between adjacent resin layers across the uneven interface is 0.03
It is preferably from 0.3 to 0.3. The resin for the resin layer A and the resin for the resin layer C may be the same.
【００１８】樹脂条Ｊの表面での光の反射を利用したい
場合には、樹脂条Ｊ用の樹脂として樹脂層Ａ用樹脂より
も低い屈折率を有する樹脂を用いることができる。ま
た、樹脂条Ｊに遮光性を付与するため、不透明樹脂や前
述の透明樹脂に各種の顔料等を添加して用いることもで
きる。When it is desired to use the reflection of light on the surface of the resin strip J, a resin having a lower refractive index than the resin for the resin layer A can be used as the resin for the resin strip J. Further, in order to impart a light-shielding property to the resin strip J, various pigments and the like can be added to the opaque resin or the transparent resin described above.
【００１９】[0019]
【実施例】以下実施例により本発明を具体的に説明する 実施例１ 樹脂層Ａ用樹脂及び樹脂層Ｃ用樹脂としてポリメチルメ
タクリレート（三菱レイヨン製、アクリペットＭＤ）、
樹脂層Ｂ用樹脂としてポリカーボネート（三菱瓦斯化学
製、ユーピロンＨ−３０００）を用意した。また、樹脂
条Ｊ用樹脂としてポリ弗化ビニリデン−テトラフルオロ
エチレン共重合体を用意した。EXAMPLES The present invention will be specifically described with reference to the following Examples. Example 1 Polymethyl methacrylate (Acrypet MD, manufactured by Mitsubishi Rayon Co., Ltd.) was used as a resin for the resin layer A and a resin for the resin layer C.
Polycarbonate (Mitsubishi Gas Chemical, Iupilon H-3000) was prepared as a resin for the resin layer B. Further, a polyvinylidene fluoride-tetrafluoroethylene copolymer was prepared as a resin for the resin strip J.
【００２０】図３〜図５に示す構造の合流部と図２及び
図１１に示すような構造の複合樹脂流路とを有する口金
装置を、図６に示す如き共押出装置に組み込んだ。複数
の樹脂層Ｊ用樹脂流路３１は、吐出口の内径が１mm、隣
接する吐出口間の間隔が３mmであった。また、樹脂層Ａ
用樹脂流路３５、３６の部分Ｒｍ及びＬｍの高さ△Ｒｍ
及び△Ｌｍを零、部分Ｒｎ及びＬｎの高さ△Ｒｎ及び△
Ｌｎをそれぞれ１mmとし、さらに部分Ｒｍ及びＲｎの巾
をそれぞれ１．５mm、部分Ｌｍ及びＬｎの巾をそれぞれ
１．５mmとした。A spinneret having a junction shown in FIGS. 3 to 5 and a composite resin flow channel shown in FIGS. 2 and 11 was incorporated into a coextrusion apparatus as shown in FIG. In the resin flow paths 31 for the plurality of resin layers J, the inner diameter of the discharge port was 1 mm, and the distance between adjacent discharge ports was 3 mm. In addition, resin layer A
Of portions Rm and Lm of the resin flow paths 35 and 36 for use △ Rm
And △ Lm is zero, and the heights 部分 Rn and △ of the portions Rn and Ln
Ln was set to 1 mm, the widths of the portions Rm and Rn were each set to 1.5 mm, and the widths of the portions Lm and Ln were each set to 1.5 mm.
【００２１】樹脂層Ｂ用樹脂流路５１のスリットの間隙
をｘ方向全体にわたって均一に１mmとし、樹脂層Ｃ用樹
脂流路５２の部分ＲＲｍの高さ△ＲＲｍを零、部分ＲＲ
ｎの高さ△ＲＲｎを１mmとし、部分ＲＲｍ及びＲＲｎの
巾をそれぞれ０．７５mmとした。樹脂層Ａ用樹脂及び樹
脂層Ｃ用樹脂を第１の押出機で、樹脂層Ｂ用樹脂を第２
の押出機で、さらに樹脂条Ｊ用樹脂を第３の押出機でそ
れぞれ溶融し、賦形ヘッド５内で分配した（図６参
照）。The gap between the slits of the resin flow path 51 for the resin layer B is uniformly set to 1 mm throughout the x direction, the height △ RRm of the portion RRm of the resin flow path 52 for the resin layer C is zero, and the portion RR
The height ΔRRn of n was 1 mm, and the width of each of the portions RRm and RRn was 0.75 mm. The resin for resin layer A and the resin for resin layer C are first extruded, and the resin for resin layer B is secondly extruded.
The resin for resin strip J was further melted by a third extruder, respectively, and distributed in the shaping head 5 (see FIG. 6).
【００２２】樹脂層Ａ用樹脂を流路３５、３６から、樹
脂条Ｊ用樹脂を流路３１から吐出するとともに、樹脂層
Ｂ用樹脂を流路５１から、樹脂層Ｃ用樹脂を流路５２か
らそれぞれ吐出させるようにした。賦形温度を２５０℃
として共押出しし、図９に示す成形ロールにてつや付け
して、５mm厚×５００mm巾の樹脂シートを連続して製造
した。The resin for the resin layer A is discharged from the flow paths 35 and 36, the resin for the resin strip J is discharged from the flow path 31, the resin for the resin layer B is discharged from the flow path 51, and the resin for the resin layer C is discharged from the flow path 52. Respectively. 250 ° C shaping temperature
Then, it was co-extruded and polished with a forming roll shown in FIG. 9 to continuously produce a resin sheet having a thickness of 5 mm and a width of 500 mm.
【００２３】得られたシートは表面が平滑な透明なシー
トであり、樹脂条Ｊの厚みは０．１〜０．２mm、長さは
３mmあり、シート表面に対する角度は約４５度であり、
樹脂条Ｊの間隔は３mmで平行に形成されていた。また、
樹脂層Ｂ及び樹脂層Ｃの厚みはそれぞれ約１mmで、界面
には図１に示すようなｈ／ｐ２の比が約０．２のかまぼ
こ状の凹凸形状が１．５mmピッチで形成されていた。The obtained sheet is a transparent sheet having a smooth surface, the thickness of the resin strip J is 0.1 to 0.2 mm, the length is 3 mm, and the angle with respect to the sheet surface is about 45 degrees.
The interval between the resin strips J was 3 mm and formed in parallel. Also,
The thickness of each of the resin layer B and the resin layer C was about 1 mm, and a semi-cylindrical irregular shape having an h / p2 ratio of about 0.2 as shown in FIG. 1 was formed at an interface at a pitch of 1.5 mm. .
【００２４】得られたシートをＺ方向長さ２００mm、Ｘ
方向長さ３００mmに切断し、導光性を評価した結果、樹
脂層Ａの表面のほぼ法線の方向に光が出射され、良好な
導光性を示した。 実施例２ 図６〜図８に示す構造の複合樹脂流形成部と図１０及び
図１１に示すような構造の複合樹脂流路とを有する口金
装置を共押出装置に組み込んだ（図６）。The obtained sheet is 200 mm long in the Z direction and X
As a result of cutting to a length of 300 mm in the direction and evaluating the light guide property, light was emitted in a direction substantially normal to the surface of the resin layer A, and good light guide property was exhibited. Example 2 A die device having a composite resin flow forming portion having a structure shown in FIGS. 6 to 8 and a composite resin flow channel having a structure shown in FIGS. 10 and 11 was incorporated in a co-extrusion device (FIG. 6).
【００２５】複数の樹脂層Ｊ用樹脂流路４１は、吐出口
の長さ（ｙ方向への投影長さ）が２mm、スリットの間隙
が０．０７mm、ｘｚ平面に対する角度が６０度であっ
た。また、樹脂層Ａ用樹脂流路４５のスリットの間隙を
０．０７mm、吐出口の長さ（ｙ方向への投影長さ）を３
mm、ｘｚ平面に対する角度を流路４１と同じく６０度と
した。流路４１及び流路４５を、それぞれ１mmのピッチ
として、交互に配置した。The plurality of resin flow paths 41 for the resin layer J had a discharge port length (projected length in the y direction) of 2 mm, a slit gap of 0.07 mm, and an angle of 60 degrees with respect to the xz plane. . The gap of the slit of the resin flow path 45 for the resin layer A is 0.07 mm, and the length of the discharge port (projected length in the y direction) is 3 mm.
The angle with respect to the mm and xz planes was set to 60 degrees as in the flow channel 41. The channels 41 and the channels 45 were alternately arranged at a pitch of 1 mm.
【００２６】樹脂層Ｂ用樹脂流路５１のスリットの間隙
をｘ方向全体にわたって均一に１mmとし、樹脂層Ｃ用樹
脂流路５２の部分ＲＲｍの高さ△ＲＲｍを零、部分ＲＲ
ｎの高さ△ＲＲｎを１mmとし、部分ＲＲｍの巾を０．７
５mm、部分ＲＲｎの巾を０．７５mmとした。実施例１と
同様の樹脂を用い、樹脂層Ａ用樹脂および樹脂層Ｃ用樹
脂を第１の押出機で、樹脂層Ｂ用樹脂を第２の押出機
で、さらに樹脂条Ｊ用樹脂を第３の押出機でそれぞれ溶
融し、賦形ヘッド５内で分配した。The gap between the slits of the resin flow path 51 for the resin layer B is made 1 mm uniformly over the entire x direction, the height △ RRm of the portion RRm of the resin flow path 52 for the resin layer C is zero, and the portion RR
n height △ RRn is 1 mm and the width of the part RRm is 0.7
5 mm and the width of the portion RRn was 0.75 mm. Using the same resin as in Example 1, the resin for the resin layer A and the resin for the resin layer C were subjected to the first extruder, the resin for the resin layer B was used for the second extruder, and the resin for the resin strip J was used for the resin. Each of the extruders 3 was melted and distributed in the shaping head 5.
【００２７】樹脂層Ａ用樹脂を流路４５から、樹脂条Ｊ
用樹脂を流路４１から吐出するとともに、樹脂層Ｂ用樹
脂を流路５１から、樹脂層Ｃ用樹脂を流路５２からそれ
ぞれ吐出させるようにした。賦形温度を２５０℃として
共押出しし、図９に示す成形ロールにてつや付けして、
５mm厚×５００mm巾の樹脂シートを連続して製造した。The resin for the resin layer A is supplied from the flow passage 45 through the resin strip J.
The resin for the resin layer B is discharged from the flow path 51, and the resin for the resin layer C is discharged from the flow path 52, respectively. Co-extruded at a shaping temperature of 250 ° C., polished with a forming roll shown in FIG.
A resin sheet having a thickness of 5 mm and a width of 500 mm was continuously manufactured.
【００２８】得られたシートは表面が平滑な透明なシー
トであり、樹脂条Ｊの厚みは約０．０７mm、長さは約
２．４mmであり、シート表面に対する角度は約６０度で
あり、樹脂条Ｊの間隔は１mmで平行に形成されていた。
また、樹脂層Ｂ及び樹脂層Ｃの厚みはそれぞれ約１mm
で、界面には図１に示すようなｈ／ｐ２の比が約０．２
のかまぼこ状の凹凸形状が１．５mmピッチで形成されて
いた。The obtained sheet is a transparent sheet having a smooth surface, the thickness of the resin strip J is about 0.07 mm, the length is about 2.4 mm, and the angle with respect to the sheet surface is about 60 degrees. The interval between the resin strips J was 1 mm and formed in parallel.
The thickness of each of the resin layers B and C is about 1 mm.
At the interface, the h / p2 ratio as shown in FIG.
In this case, the concave and convex shape was formed at a pitch of 1.5 mm.
【００２９】得られたシートをｚ方向長さ２００mm、ｘ
方向長さ３００mmに切断し、導光性を評価した結果、樹
脂層Ａの表面のほぼ法線の方向に光が出射され、良好な
導光性を示した。The obtained sheet was set to a length of 200 mm in the z direction and x
As a result of cutting to a length of 300 mm in the direction and evaluating the light guide property, light was emitted in a direction substantially normal to the surface of the resin layer A, and good light guide property was exhibited.
【００３０】[0030]
【発明の効果】本発明によれば、道路標識、照明看板、
案内板、液晶表示装置、採光窓等の導光性シート、光変
角性シートの他、照明器具等の光拡散性シートや、深み
感や立体感を付与した特殊意匠性シート等の多様な目的
及び用途に好適な樹脂シートを提供することが、さらに
これらのシートを一工程で極めて簡便に、かつ、生産性
よく製造することができる。According to the present invention, road signs, lighting signs,
In addition to guide sheets, liquid crystal display devices, light guide sheets such as daylighting windows, light deflecting sheets, light diffusing sheets such as lighting equipment, and specially designed sheets with a sense of depth and depth, etc. Providing resin sheets suitable for the purpose and application further enables these sheets to be produced very simply and with high productivity in one step.
【図１】本発明のシートの代表的な例を示すＸＹ平面の
断面図。FIG. 1 is an XY plane cross-sectional view showing a typical example of a sheet according to the present invention.
【図２】本発明の装置の一態様に係る複合樹脂流形成部
のｙｚ平面の模式断面図。FIG. 2 is a schematic cross-sectional view of a yz plane of a composite resin flow forming unit according to one embodiment of the apparatus of the present invention.
【図３】図２におけるII−II線に沿う斜視断面図。FIG. 3 is a perspective sectional view taken along line II-II in FIG. 2;
【図４】図２におけるIII −III 線に沿う矢視断面図。FIG. 4 is a sectional view taken along the line III-III in FIG. 2;
【図５】図４におけるIV−IV線に沿う矢視断面図。FIG. 5 is a sectional view taken along the line IV-IV in FIG. 4;
【図６】本発明に係る他の態様の複合樹脂流形成部を有
する装置のｘｚ平面の模式断面図。FIG. 6 is a schematic cross-sectional view on an xz plane of an apparatus having a composite resin flow forming unit according to another embodiment of the present invention.
【図７】図６におけるＶ−Ｖ線に沿う矢視断面図。FIG. 7 is a sectional view taken along the line VV in FIG. 6;
【図８】図７におけるVI−VI線に沿う矢視断面図。8 is a sectional view taken along the line VI-VI in FIG. 7;
【図９】本発明に用いる成形ロールの構成を示す模式
図。FIG. 9 is a schematic view showing a configuration of a forming roll used in the present invention.
【図１０】図６に示す装置の複合樹脂流形成部のｙｚ平
面の模式断面図。10 is a schematic sectional view of the composite resin flow forming section of the apparatus shown in FIG. 6, taken along the yz plane.
【図１１】図２及び図１０における流路５２のVII −VI
I 線に沿う斜視断面図。FIG. 11 is a VII-VI of the flow channel 52 in FIGS. 2 and 10;
FIG. 3 is a perspective sectional view taken along line I.
２１…複合樹脂流路 ２２…複合樹脂流形成部 ２３…複合樹脂流出口 ３１…樹脂条Ｊ用樹脂流路 ３５、３６…樹脂層Ａ用樹脂流路 ４１…樹脂条Ｊ用樹脂流路 ４５…樹脂層Ａ用樹脂流路 ５１…樹脂層Ｂ用樹脂流路 ５２…樹脂層Ｃ用樹脂流路 DESCRIPTION OF SYMBOLS 21 ... Composite resin flow path 22 ... Composite resin flow forming part 23 ... Composite resin flow outlet 31 ... Resin flow path for resin strip J 35, 36 ... Resin flow path for resin layer A 41 ... Resin flow path for resin strip J 45 ... Resin flow path for resin layer A 51: resin flow path for resin layer B 52: resin flow path for resin layer C
Claims (5)
て透明な樹脂層Ｂが挟まれた積層構造を有する、外表面
が平滑な樹脂シートであって、隣接する樹脂層の樹脂の
屈折率が異なり、シートの巾方向をＸ、厚み方向をＹ、
そして長さ方向をＺとした場合に、ＸＹ平面で表される
断面において、樹脂層Ａ中に扁平形状の複数の樹脂条Ｊ
が埋設され、かつ、樹脂層Ｂと樹脂層Ｃの境界面が凹凸
形状を有していることを特徴とする樹脂シート。1. A resin sheet having a laminated structure in which a transparent resin layer B is sandwiched between a transparent resin layer A and a transparent resin layer C, and having a smooth outer surface, wherein the resin of an adjacent resin layer is refracted. The ratio is different, the width direction of the sheet is X, the thickness direction is Y,
When the length direction is Z, a plurality of flat resin strips J are formed in the resin layer A in the cross section represented by the XY plane.
And a boundary surface between the resin layer B and the resin layer C has an uneven shape.
み、そしてｚ方向に所定の長さを有し、ｚ方向の一端に
複合樹脂流形成部（２２）、及び他端に複合樹脂流出口
（２３）を有する複合樹脂流路（２１）内の複合樹脂流
形成部（２２）において、樹脂条Ｊ用樹脂をｚ方向に向
かって流出させるための複数の流路（３１）、及びｘｚ
平面の両側から複合樹脂流形成部（２２）に向けて樹脂
層Ａ用樹脂を流出させるための２列の流路（３５、３
６）を含み、 複数の樹脂条Ｊ用樹脂の流路（３１）はｘ方向に所定の
間隔をもって配置され、樹脂層Ａ用樹脂の流路（３５、
３６）のｘｚ断面はｚ方向の高さが大きい部分Ｒｎ及び
Ｌｎと、ｚ方向の高さが小さい（零を含む）部分Ｒｍ及
びＬｍとが交互に配置された形状を有し、 複合樹脂流形成部（２２）と複合樹脂流出口（２３）と
の間の複合樹脂流路（２１）に向けて、樹脂層Ｂ用樹脂
を流出させるスリット状の流路（５１）と、ｚ方向の下
流側に樹脂層Ｃ用樹脂を流出させるための流路（５２）
とを具備し、流路（５２）のｘｚ断面はｚ方向の高さが
大きい部分ＲＲｎと、ｚ方向の高さが小さい（零を含
む）部分ＲＲｍとが交互に配置されていることを特徴と
する樹脂シートの製造装置。2. It has a predetermined width in the x direction, a predetermined thickness in the y direction, and a predetermined length in the z direction, a composite resin flow forming portion (22) at one end in the z direction, and a composite at the other end. A plurality of flow paths (31) for allowing resin for resin strip J to flow out in the z direction in a composite resin flow forming section (22) in a composite resin flow path (21) having a resin outlet (23); And xz
Two rows of flow paths (35, 3) through which the resin for resin layer A flows out from both sides of the plane toward the composite resin flow forming section (22).
6), the flow paths (31) of the resin for the resin strip J are arranged at predetermined intervals in the x direction, and the flow paths (35,
The xz cross section of 36) has a shape in which portions Rn and Ln having a large height in the z direction and portions Rm and Lm having a small height (including zero) in the z direction are alternately arranged. A slit-shaped flow path (51) for discharging the resin for the resin layer B toward the composite resin flow path (21) between the forming section (22) and the composite resin outlet (23), and a downstream in the z direction. Flow path (52) for allowing resin for resin layer C to flow to the side
In the xz cross section of the flow path (52), portions RRn having a large height in the z direction and portions RRm having a small height (including zero) in the z direction are alternately arranged. For manufacturing a resin sheet.
用樹脂を流路（３５、３６）から、また樹脂条Ｊ用樹脂
を流路（３１）から複合樹脂流形成部（２２）に流出さ
せ、次に樹脂層Ｂ用樹脂を流路（５１）から、さらに樹
脂層Ｃ用樹脂を流路（５２）から、複合樹脂流路（２
１）に流出させて複合樹脂流を形成し、複合樹脂流出口
（２３）から溶融状態の樹脂シートとして押し出し、 この溶融状態の樹脂シートを、少なくとも一対の成形ロ
ール間に挟み込み、樹脂シートの一方の面と成形ロール
との間に溶融樹脂の溜まりを形成しつつ押出成形するこ
とを特徴とする樹脂シートの製造方法。3. The method according to claim 2, wherein the resin layer A
The resin for flow is discharged from the flow paths (35, 36) and the resin for the resin strip J is discharged from the flow path (31) to the composite resin flow forming section (22), and then the resin for the resin layer B is discharged to the flow path (51). And the resin for the resin layer C from the channel (52) through the composite resin channel (2).
1) to form a composite resin flow, extruded as a molten resin sheet from the composite resin outlet (23), and sandwich the molten resin sheet between at least a pair of forming rolls. Extrusion forming while forming a pool of molten resin between the surface of the sheet and a forming roll.
み、そしてｚ方向に所定の長さを有し、ｚ方向の一端に
複合樹脂流形成部（２２）、及び他端に複合樹脂流出口
（２３）を有する複合樹脂流路（２１）と、複合樹脂流
形成部（２２）のｘｙ平面に面して配置された樹脂条Ｊ
用の複数列のスリット状の流路（４１）と、樹脂層Ａ用
の複数列のスリット状の流路（４５）とを含み、 スリット状の流路（４１）及び流路（４５）はｙ方向に
平行にもしくはｙ方向と所定の角度をもってそれぞれが
交互に配置され、複合樹脂流形成部（２２）において、
樹脂条Ｊ用樹脂流路（４１）のｙ方向への投影長さｖ
が、樹脂層Ａ用樹脂流路（４５）のｙ方向への投影長さ
ｑより短く、 複合樹脂流形成部（２２）と複合樹脂流出口（２３）と
の間の複合樹脂流路（２１）に向けて、樹脂層Ｂ用樹脂
を流入させるスリット状の流路（５１）と、ｚ方向の下
流側に樹脂層Ｃ用樹脂を流出させるための流路（５２）
とを具備し、流路（５２）のｘｚ断面はｚ方向の高さが
大きい部分ＲＲｎと、ｚ方向の高さが小さい（零を含
む）部分ＲＲｍとが交互に配置されていることを特徴と
する樹脂シートの製造装置。4. It has a predetermined width in the x direction, a predetermined thickness in the y direction, and a predetermined length in the z direction, a composite resin flow forming portion (22) at one end in the z direction, and a composite at the other end. A composite resin flow path (21) having a resin outlet (23); and a resin strip J disposed facing the xy plane of the composite resin flow forming section (22).
And a plurality of rows of slit-shaped flow paths (45) for the resin layer A. The slit-shaped flow paths (41) and (45) Each of them is arranged alternately in parallel with the y direction or at a predetermined angle with the y direction, and in the composite resin flow forming section (22),
Projection length v in the y direction of resin flow path (41) for resin strip J
Is shorter than the projection length q of the resin flow path (45) for the resin layer A in the y direction, and the composite resin flow path (21) between the composite resin flow forming part (22) and the composite resin outlet (23). ), And a slit-shaped flow path (51) for flowing the resin for the resin layer B, and a flow path (52) for flowing the resin for the resin layer C to the downstream side in the z direction.
In the xz cross section of the flow path (52), portions RRn having a large height in the z direction and portions RRm having a small height (including zero) in the z direction are alternately arranged. For manufacturing a resin sheet.
用樹脂を流路（４５）から、また樹脂条Ｊ用樹脂を流路
（４１）から複合樹脂流形成部（２２）に流出させ、次
に樹脂層Ｂ用樹脂を流路（５１）から、さらに樹脂層Ｃ
用樹脂を流路（５２）から、複合樹脂流路（２１）に流
出させて複合樹脂流を形成し、複合樹脂流出口（２３）
から溶融状態の樹脂シートとして押し出し、 この溶融状態の樹脂シートを、少なくとも一対の成形ロ
ール間に挟み込み、樹脂シートの一方の面と成形ロール
との間に溶融樹脂の溜まりを形成しつつ押出成形するこ
とを特徴とする樹脂シートの製造方法。5. The method according to claim 4, wherein the resin layer A
The resin for resin layer J is caused to flow out from the channel (45), and the resin for resin strip J is caused to flow from the channel (41) to the composite resin flow forming portion (22). Further, resin layer C
The resin for flow is caused to flow out of the channel (52) into the composite resin channel (21) to form a composite resin flow, and the composite resin outlet (23)
Extruded as a resin sheet in a molten state, and the resin sheet in the molten state is sandwiched between at least a pair of forming rolls, and extruded while forming a pool of molten resin between one surface of the resin sheet and the forming rolls. A method for producing a resin sheet, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9349247A JPH11179777A (en) | 1997-12-18 | 1997-12-18 | Resin sheet, manufacture thereof and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9349247A JPH11179777A (en) | 1997-12-18 | 1997-12-18 | Resin sheet, manufacture thereof and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11179777A true JPH11179777A (en) | 1999-07-06 |
Family
ID=18402483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9349247A Pending JPH11179777A (en) | 1997-12-18 | 1997-12-18 | Resin sheet, manufacture thereof and device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11179777A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111361073A (en) * | 2020-03-19 | 2020-07-03 | 苏州坚特而光电科技有限公司 | Method for processing diffusion plate |
-
1997
- 1997-12-18 JP JP9349247A patent/JPH11179777A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111361073A (en) * | 2020-03-19 | 2020-07-03 | 苏州坚特而光电科技有限公司 | Method for processing diffusion plate |
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