JP3075375B2 - Polystyrene resin laminated sheet and method for producing the same - Google Patents
Polystyrene resin laminated sheet and method for producing the sameInfo
- Publication number
- JP3075375B2 JP3075375B2 JP03290423A JP29042391A JP3075375B2 JP 3075375 B2 JP3075375 B2 JP 3075375B2 JP 03290423 A JP03290423 A JP 03290423A JP 29042391 A JP29042391 A JP 29042391A JP 3075375 B2 JP3075375 B2 JP 3075375B2
- Authority
- JP
- Japan
- Prior art keywords
- polystyrene resin
- sheet
- layer
- impact polystyrene
- foaming
- 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 - Fee Related
Links
Landscapes
- Laminated Bodies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はポリスチレン系樹脂積層
シートに関し、特に機械的強度と曲面印刷性を要求され
る食品容器用の素材として好適なものを提供しようとす
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated sheet of a polystyrene resin, and more particularly to a material which is suitable as a material for food containers requiring mechanical strength and curved surface printability.
【０００２】[0002]
【従来の技術】近年、各種即席食品やスナック食品等を
収納する容器として、発泡ポリスチレン系樹脂シートを
加熱成形して成る容器が用いられて来た。上記ポリスチ
レン等の発泡シートは軽量で安価であること、断熱性が
良好であることなどの長所を有する反面、深絞り加工が
困難であることや容器等の２次製品とした場合に天地強
度（上下強度）やリブ強度（横強度）などの機械的強度
に劣る点或いは容器外側面が発泡シート面となるため曲
面印刷性に劣るなどの欠点があった。2. Description of the Related Art In recent years, a container formed by heat-forming a foamed polystyrene resin sheet has been used as a container for storing various instant foods, snack foods and the like. It foamed sheet such as the polystyrene is inexpensive lightweight, anti surfaces that have a merit such that heat insulation is good, when deep drawing was a secondary product of that and the container or the like is difficult There are drawbacks such as poor mechanical strength such as vertical strength (vertical strength) and rib strength (lateral strength), or poor curved surface printability because the outer surface of the container is a foam sheet surface.
【０００３】上記欠点を解決するため、ハイインパクト
ポリスチレン樹脂を押出機内で溶融した後、該溶融ハイ
インパクトポリスチレン樹脂をＴダイから押出すと共に
ポリスチレン系樹脂高発泡シート層の一方の面に融着さ
せた積層構造から成るポリスチレン系樹脂積層シートを
製造することも行なわれて来た。In order to solve the above-mentioned drawbacks, after a high-impact polystyrene resin is melted in an extruder, the molten high-impact polystyrene resin is extruded from a T-die and fused to one surface of a highly foamed polystyrene resin sheet layer. The production of a polystyrene-based resin laminated sheet having a laminated structure has also been performed.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前記の
技術によって得られたポリスチレン系樹脂積層シート
は、深絞り加工性に優れると共に容器が天地強度やリブ
強度などに優れる長所を付与するものであったが、一方
で、容器の外側面に曲面印刷を施す被印刷面（インキ受
理層）が非発泡ハイインパクトポリスチレン樹脂層とな
りクッション性に劣るため、曲面印刷性が充分ではなく
一層の向上が望まれていた。また、ハイインパクトポリ
スチレン樹脂層は非発泡であるため使用量が多くなり
（発泡に比べ）、省資源化、廃棄時の環境保護などに充
分留意できないなどの問題もあった。However, the polystyrene-based resin laminate sheet obtained by the above-described technique has the advantage of being excellent in deep drawing workability and providing the container with excellent strength such as vertical strength and rib strength. but on the other hand, since the printing surface subjected to curved surface printing on the outside surface of the container (ink receiving layer) is inferior in cushioning property becomes non-foamed coordinating damper transfected polystyrene resin layer, further improvement is not sufficient curved surface printability is Nozomu Was rare. In addition, the high-impact polystyrene resin layer is non-foamed, so that the amount used is large (compared to foaming), and there is also a problem that resource saving and environmental protection at the time of disposal cannot be sufficiently considered.
【０００５】そこで本発明者等は、ポリスチレン系樹脂
積層シート及びその製造方法に就き鋭意研究を重ねた結
果、ハイインパクトポリスチレン樹脂を熱分解型発泡剤
と共に押出機内で溶融混練した後、該ハイインパクトポ
リスチレン樹脂組成物をＴダイから大気中に重力方向に
押出すことにより所定厚さで所定発泡倍率のポリスチレ
ン系樹脂高発泡シート層の一方の面に所定厚さで所定発
泡倍率のハイインパクトポリスチレン樹脂低発泡層をシ
ート状に積層して融着し、次いで該ハイインパクトポリ
スチレン樹脂低発泡層を冷却して積層シートを製造する
こと、及びこのようにして得られたポリスチレン系樹脂
積層シートが深絞り加工性、容器の天地強度やリブ強度
などの性能及び曲面印刷性にも優れ且つ省資源化や環境
保護にも寄与することを見出し本発明に到達した。Accordingly, the present inventors have conducted intensive studies on a laminated sheet of polystyrene resin and a method for producing the same. As a result, after melt-kneading a high-impact polystyrene resin together with a pyrolysis type foaming agent in an extruder, the high-impact polystyrene resin was mixed. By extruding the polystyrene resin composition from the T-die into the atmosphere in the direction of gravity, polystyrene having a predetermined thickness and a predetermined expansion ratio is obtained.
Specified thickness on one side of high foam resin layer
High impact polystyrene resin low foam layer with foam ratio
Laminated and fused, then the high impact poly
The laminated sheet is produced by cooling the styrene resin low-foaming layer , and the polystyrene-based resin laminated sheet thus obtained is improved in deep drawing workability, performance such as vertical strength and rib strength of the container, and curved surface printability. And also contributed to resource saving and environmental protection, and reached the present invention.
【０００６】従って、本発明の第１の目的は深絞り加工
性、容器の天地強度やリブ強度などの性能及び曲面印刷
性にも優れ且つ省資源化や環境保護にも貢献するポリス
チレン系樹脂積層シートを提供することにある。本発明
の第２の目的は深絞り加工性、容器の天地強度やリブ強
度などの性能及び曲面印刷性にも優れ且つ省資源化や環
境保護にも貢献するポリスチレン系樹脂積層シートを製
造するための方法を提供することにある。Accordingly, a first object of the present invention is to provide a polystyrene-based resin laminate which excels in deep drawing workability, performance such as vertical strength and rib strength of a container, and excellent curved printability, and contributes to resource saving and environmental protection. To provide a seat. A second object of the present invention is to produce a polystyrene resin laminated sheet which is excellent in deep drawing workability, performance such as vertical strength and rib strength of a container and excellent in curved surface printability, and contributes to resource saving and environmental protection. The purpose is to provide a method.
【０００７】[0007]
【課題を解決するための手段】本発明の第１の目的は、
厚さが1.0〜3.0mmで発泡倍率が５〜15倍のポリスチレン
系樹脂高発泡シート層と、厚さが50〜300μmで発泡倍率
が1.1〜2.5倍のハイインパクトポリスチレン樹脂低発泡
層とから成ることを特徴とするポリスチレン系樹脂積層
シートによって達成された。SUMMARY OF THE INVENTION A first object of the present invention is to:
It consists of a high foamed polystyrene resin sheet layer with a thickness of 1.0 to 3.0 mm and an expansion ratio of 5 to 15 times, and a high impact polystyrene resin low foam layer with a thickness of 50 to 300 μm and an expansion ratio of 1.1 to 2.5 times. This has been achieved by a polystyrene-based resin laminated sheet characterized in that:
【０００８】本発明の第２の目的は、ハイインパクトポ
リスチレン樹脂を熱分解型発泡剤と共に押出機内で溶融
混練した後、該ハイインパクトポリスチレン樹脂組成物
をＴダイから大気中に重力方向に押出すことにより、厚
さが1.0〜3.0mmで発泡倍率が５〜15倍のポリスチレン系
樹脂高発泡シート層の一方の面に厚さが50〜300μmで発
泡倍率が1.1〜2.5倍のハイインパクトポリスチレン樹脂
低発泡層をシート状に積層して融着し、次いで該ハイイ
ンパクトポリスチレン樹脂低発泡層を冷却することを特
徴とするポリスチレン系樹脂積層シートの製造方法によ
って達成された。A second object of the present invention is to melt-knead a high-impact polystyrene resin together with a pyrolytic foaming agent in an extruder and then extrude the high-impact polystyrene resin composition from a T-die into the atmosphere in the direction of gravity. By the thickness
Originating Saga expansion ratio thickness on one surface of 5 to 15 times the polystyrene resin and high foamed sheet layer 1.0~3.0mm is 50~300μm
High impact polystyrene resin with a foam ratio of 1.1 to 2.5 times
Fused by laminating low foaming layer into a sheet and then is achieved by the method for producing a polystyrene-based resin laminate sheet, which comprises cooling the high impact polystyrene resin low foaming layer.
【０００９】本発明で用いることのできる厚さが1.0〜
3.0mmで発泡倍率が５〜15倍のポリスチレン系樹脂高発
泡シートは、一般に行なわれている押出発泡成形法によ
って得られた発泡シートであり、スチレン系樹脂は特に
限定されないが、例えば汎用ポリスチレン樹脂、ハイイ
ンパクトポリスチレン樹脂、スチレン−アクリロニトリ
ル共重合体樹脂、スチレン−メチルメタアクリレート共
重合体樹脂、スチレン−アクリル酸共重合体樹脂、スチ
レン−無水マレイン酸共重合体樹脂及びこれ等の混合物
等の中から適宜選択して使用することができる。The thickness which can be used in the present invention is 1.0 to
A polystyrene-based resin high-expandable sheet having an expansion ratio of 5 to 15 times at 3.0 mm is a foamed sheet obtained by a commonly used extrusion foaming method, and the styrene-based resin is not particularly limited. , High impact polystyrene resin, styrene-acrylonitrile copolymer resin, styrene-methyl methacrylate copolymer resin, styrene-acrylic acid copolymer resin, styrene-maleic anhydride copolymer resin and mixtures thereof. Can be appropriately selected and used.
【００１０】これ等のポリスチレン系樹脂にはタルク、
炭酸カルシウム等の無機物、可塑剤及び安定剤を所望す
る物性に応じて添加することができる。また、発泡剤と
しては、ポリスチレン系樹脂の発泡剤として公知の物理
発泡剤または化学発泡剤の中から適宜選択して使用する
ことが出来る。物理発泡剤としては、例えばプロパン、
ブタン、ヘキサン、ヘプタン等の炭化水素化合物、フレ
オン−１１、フレオン−１２、フレオン−１１３、フレ
オン−１１４（フレオンはデュポン社の商品名）、メチ
ルクロライド、メチレンクロライド等のハロゲン化炭化
水素化合物を挙げることができる。化学発泡剤として
は、例えばアゾジカルボンアミド等の有機系熱分解型発
泡剤、重炭酸塩とクエン酸等の有機酸との組合わせ等を
挙げることができる。 [0010] These polystyrene resins include talc,
Inorganic substances such as calcium carbonate, plasticizers and stabilizers can be added according to desired physical properties. The foaming agent can be appropriately selected from physical foaming agents or chemical foaming agents known as polystyrene-based resin foaming agents. As the physical foaming agent, for example, propane,
Examples include hydrocarbon compounds such as butane, hexane, heptane, and the like, halogenated hydrocarbon compounds such as Freon-11, Freon-12, Freon-113, and Freon-114 (Freon is a trade name of DuPont), methyl chloride, and methylene chloride. be able to. As chemical blowing agent
Is an organic pyrolysis type such as azodicarbonamide
Combination of foaming agent, bicarbonate and organic acid such as citric acid
Can be mentioned.
【００１１】本発明で押出し積層されるハイインパクト
ポリスチレン樹脂は特に限定されないが、例えばポリス
チレン樹脂にブタジェン、ブテン等のゴム成分を含有さ
せたものを挙げることができる。これ等のハイインパク
トポリスチレン樹脂にはタルク、炭酸カルシウム等の無
機物、可塑剤、分散剤及び安定剤を所望する物性に応じ
て添加することができる。The high-impact polystyrene resin to be extruded and laminated in the present invention is not particularly limited, and examples thereof include a polystyrene resin containing a rubber component such as butadiene or butene. Inorganic substances such as talc and calcium carbonate, plasticizers, dispersants and stabilizers can be added to these high-impact polystyrene resins according to desired physical properties.
【００１２】また、該ハイインパクトポリスチレン樹脂
に発泡能を具備させるための発泡剤としては熱分解型発
泡剤が用いられる。熱分解型発泡剤の具体例としては、
例えばアゾジカルボンアミド、トリヒロラジノトリアジ
ン、アゾジカルボン酸ストロンチウム、ヒドラゾジカル
ボナミドなど公知の発泡剤を挙げることができる。Further, as a foaming agent for providing the high-impact polystyrene resin with a foaming ability, a thermal decomposition type foaming agent is used . Specific examples of the pyrolytic foaming agent include:
For example, known foaming agents such as azodicarbonamide, trihydrazinotriazine, strontium azodicarboxylate, and hydrazodicarbonamide can be used.
【００１３】本発明のポリスチレン系樹脂積層シート
は、厚さが1.0〜3.0mmで発泡倍率が５〜15倍のポリスチ
レン系樹脂高発泡シート層と、厚さが50〜300μmで発泡
倍率が1.1〜2.5倍のハイインパクトポリスチレン樹脂低
発泡層とから成る。従って、本発明のポリスチレン系樹
脂積層シートを図示すると図１の様になる。図中１はポ
リスチレン系樹脂高発泡シート層、２はハイインパクト
ポリスチレン樹脂層である。また、ポリスチレン系樹脂
高発泡シート層の発泡倍率を５〜15倍としたのは５倍未
満では断熱性が充分でなく、容器とした場合の質感にも
劣る。一方、15倍超では本発明のハイインパクトポリス
チレン樹脂低発泡層を積層しても容器の天地強度やリブ
強度が充分に付与されないためによる。The polystyrene resin laminated sheet of the present invention comprises a highly foamed polystyrene resin sheet layer having a thickness of 1.0 to 3.0 mm and a foaming ratio of 5 to 15 times, and a foaming ratio of 50 to 300 μm and a foaming ratio of 1.1 to 1.1. Consists of 2.5 times high impact polystyrene resin low foam layer. Therefore, the polystyrene resin laminated sheet of the present invention is illustrated in FIG. In the figure, reference numeral 1 denotes a polystyrene resin highly foamed sheet layer, and reference numeral 2 denotes a high impact polystyrene resin layer. When the expansion ratio of the polystyrene resin highly foamed sheet layer is set to 5 to 15 times, if the expansion ratio is less than 5 times, the heat insulating property is not sufficient, and the texture of a container is inferior. On the other hand, if it exceeds 15 times, even if the high-impact polystyrene resin low-foaming layer of the present invention is laminated, the vertical strength and rib strength of the container are not sufficiently imparted.
【００１４】ハイインパクトポリスチレン樹脂低発泡層
の発泡倍率を1.1〜2.5倍としたのは、1.1倍未満では曲
面印刷性の向上効果（クッション性）が充分得られな
い。また、経済効果も小さい。一方2.5倍超では、発泡
により表面性が悪化するため、却って曲面印刷性が低下
するなどのためである。The reason why the expansion ratio of the high-impact polystyrene resin low-foaming layer is set to 1.1 to 2.5 times is that if it is less than 1.1 times, the effect of improving curved surface printability (cushioning property) cannot be sufficiently obtained. The economic effect is also small. On the other hand, when the ratio is more than 2.5 times, the surface properties are deteriorated due to foaming, so that the curved surface printability is rather lowered.
【００１５】本発明でハイインパクトポリスチレン樹脂
に発泡能を具備させるための発泡剤として熱分解型発泡
剤が用いられるとしたのは、該ハイインパクトポリスチ
レン樹脂低発泡層を積層した本発明から成るポリスチレ
ン系樹脂積層シートを、容器などの２次製品に加工する
際の加熱成形工程での、ハイインパクトポリスチレン樹
脂低発泡層の２次発泡を防止或いは極力抑えるためであ
る。In the present invention, the thermal decomposition type foaming agent is used as a foaming agent for providing the high impact polystyrene resin with foaming ability. This is for preventing or minimizing the secondary foaming of the high-impact polystyrene resin low-foaming layer in the heating and molding step when processing the base resin laminated sheet into a secondary product such as a container.
【００１６】次に、本発明のポリスチレン系樹脂積層シ
ートの製造方法を図に従って説明する。図２は本発明の
製造方法に用いる押出し積層装置の概略図である。Next, a method for producing a polystyrene resin laminated sheet of the present invention will be described with reference to the drawings. FIG. 2 is a schematic view of an extrusion laminating apparatus used in the production method of the present invention.
【００１７】図に於いてポリスチレン系樹脂高発泡シー
ト１は図外のアンワインダーから繰り出され加圧ロール
４と冷却ロール５の間に通され一定の速度で走行してい
る。次いで、ハイインパクトポリスチレン樹脂に熱分解
型発泡剤を予め分散させた混合物を押出機６内で溶融混
練させた後、押出機６の先端に取付けられたＴダイ７の
オリフィス８から大気中に重力方向に押出し、該ハイイ
ンパクトポリスチレン樹脂組成物２をポリスチレン系樹
脂高発泡シート１の加圧ロール４と非接触面と冷却ロー
ル５との間に導いた。この場合、ポリスチレン系樹脂高
発泡シート１とハイインパクトポリスチレン樹脂組成物
２は融着すると共にハイインパクトポリスチレン樹脂組
成物２は冷却ロール５により急冷され、固化する。その
後ポリスチレン系樹脂高発泡シートにハイインパクトポ
リスチレン樹脂低発泡層が積層されたポリスチレン系樹
脂積層シート３は図外のワインダーにより巻き取られ
る。In FIG. 1, a highly foamed polystyrene resin sheet 1 is fed from an unwinder (not shown), passes between a pressure roll 4 and a cooling roll 5, and runs at a constant speed. Next, a mixture of a high-impact polystyrene resin and a pyrolytic foaming agent previously dispersed therein is melt-kneaded in the extruder 6, and then gravity is introduced into the atmosphere from the orifice 8 of the T-die 7 attached to the tip of the extruder 6. The high-impact polystyrene resin composition 2 was guided between the pressure roll 4 and the non-contact surface of the high-expanded polystyrene resin sheet 1 and the cooling roll 5. In this case, the high-expanded polystyrene resin sheet 1 and the high-impact polystyrene resin composition 2 are fused and the high-impact polystyrene resin composition 2 is rapidly cooled by the cooling roll 5 and solidified. Thereafter, the polystyrene-based resin laminated sheet 3 in which the high-impact polystyrene resin low-foaming layer is laminated on the polystyrene-based resin high-foaming sheet is wound by a winder (not shown).
【００１８】本発明の製造方法の特徴は、ポリスチレン
系樹脂高発泡シートに積層するハイインパクトポリスチ
レン樹脂層の低発泡化を熱分解型発泡剤で図る点にあ
る。即ち、該熱分解型発泡剤はハイインパクトポリスチ
レン樹脂低発泡層を形成することのみに作用する（発泡
剤は完全に分解する）ため、容器等の２次製品に成形す
め際の加熱成形過程では作用しない（２次発泡が生じな
い）。そのため、２次製品の表面性は加熱成形前と変わ
らない。従って２次製品としても表面性に優れ且つ適度
なクッション性を有する被印刷面となるので曲面印刷性
も優れるものとなる。A feature of the production method of the present invention is that a high-impact polystyrene resin layer laminated on a polystyrene-based resin highly foamed sheet is reduced in foaming by using a pyrolytic foaming agent. That is, since the thermal decomposition type foaming agent acts only to form a high-impact polystyrene resin low foaming layer (the foaming agent is completely decomposed), the heat molding process during molding into a secondary product such as a container is required. Does not work (no secondary foaming occurs). Therefore, the surface properties of the secondary product are not different from those before heat molding. Therefore, the secondary product is also a surface to be printed having excellent surface properties and moderate cushioning properties, so that curved surface printability is also excellent.
【００１９】[0019]
【実施例】以下に本発明を実施例により詳述するが、本
発明はこれによって限定されるものではない。 実施例１ ポリスチレン系樹脂高発泡シートは、一般に行なわれて
いる押出発泡成形法により得られた、幅が300mm、厚さ
が2.3mm、坪量が230g/m2、発泡倍率が10倍のシートを使
用し、図２に示した加圧ロール４と10℃の冷却水が循環
している冷却ロール５間に５m/分の速度で通した。EXAMPLES The present invention will be described below in detail with reference to examples, but the present invention is not limited by these examples. Example 1 A polystyrene-based resin highly foamed sheet is a sheet obtained by a commonly used extrusion foaming method and having a width of 300 mm, a thickness of 2.3 mm, a basis weight of 230 g / m 2 , and an expansion ratio of 10 times. Was passed between the pressure roll 4 shown in FIG. 2 and the cooling roll 5 circulating cooling water at 10 ° C. at a speed of 5 m / min.
【００２０】次いで、ハイインパクトポリスチレン樹脂
100重量部に分散剤として流動パラフィン0.05重量部を
添加した後、更に熱分解型発泡剤としてアゾジカルボン
アミド0.4重量部及び気泡調整剤として炭酸カルシウム
粉末1.0重量部とを添加して分散させた。Next, a high impact polystyrene resin
After addition of liquid paraffin 0.05 part by weight as a dispersant to 100 parts by weight was further dispersed by the addition of a calcium carbonate powder 1.0 parts by weight Azojika Le Bon'amido 0.4 parts by weight of nucleating agents as a thermally decomposable foaming agent.
【００２１】このようにして得られたハイインパクトポ
リスチレン系樹脂組成物を、220℃に加熱した直径40mm
の押出機を用いて溶融混練しながら、押出機の先端に取
付けられた幅400mmのＴダイから押出量15.3kg/時で押出
すと共にポリスチレン系樹脂高発泡シートと冷却ロール
４との間に導き（この時のハイインパクトポリスチレン
樹脂組成物の厚さは170μmで坪量は85g/m2、発泡倍率は
２倍であった。）厚さが2.5mm、坪量が315g/m2の本発明
によるポリスチレン系樹脂積層シートを作製した。The high-impact polystyrene resin composition thus obtained was heated to 220 ° C. and had a diameter of 40 mm.
While extruding at a rate of 15.3 kg / h from a 400 mm wide T-die attached to the tip of the extruder, and guiding the mixture between the polystyrene resin foam sheet and the cooling roll 4 while melt-kneading using an extruder. (basis weight thickness of high impact polystyrene resin composition when this is 170μm is 85 g / m 2, the expansion ratio was doubled.) thickness 2.5 mm, basis weight present invention 315 g / m 2 To produce a polystyrene-based resin laminated sheet.
【００２２】この様にして得られたポリスチレン系樹脂
積層シートを、口径140mm、深さが75mmのどんぶりに成
形した。得られたどんぶりの天地強度（どんぶりの上下
方向）及びリブ強度（どんぶりの横強度）は、引張り試
験機（テンシロンＨＴＭ−100；東洋ボールドウィン社
製）で50mm/分でどんぶりを夫々の方向から10mm変形さ
せた時の最大加重から求めた。天地強度は35kgであり、
口径強度は330gであった。また曲面印刷性は、どんぶり
の側面を切取り印刷機（ＲＩテスタ；明製作所製）でハ
イインパクトポリスチレン樹脂低発泡層面に印刷を施
し、印刷面濃度（マクベス濃度計；KollmorgenCorp製）
と印刷面光沢度（75°/75°光沢度計；村上色彩研究所
製）から評価した。印刷面濃度は1.6ポイント、印刷面
光沢度は80％であった。印刷面はインキの着肉性が良く
印刷性に優れるものであった。The polystyrene resin laminated sheet thus obtained was formed into a bowl having a diameter of 140 mm and a depth of 75 mm. The vertical strength (vertical direction of the bowl) and the rib strength (lateral strength of the bowl) of the obtained bowl were measured at 50 mm / min with a tensile tester (Tensilon HTM-100; manufactured by Toyo Baldwin Co.) at 10 mm from each direction. It was determined from the maximum weight when deformed. The vertical strength is 35kg,
The caliber strength was 330 g. The curved surface printability is determined by printing the high-impact polystyrene resin low-foamed layer surface with a printing machine (RI tester; manufactured by Akira Seisakusho) by cutting out the side of the bowl and printing the surface density (Macbeth densitometer; manufactured by Kollmorgen Corp).
And the glossiness of the printing surface (75 ° / 75 ° glossmeter; manufactured by Murakami Color Research Laboratory). The printing surface density was 1.6 points, and the printing surface glossiness was 80%. The printed surface had good ink depositability and excellent printability.
【００２３】比較例１ 実施例１と全く同一の装置で、ハイインパクトポリスチ
レン樹脂のみを押出機内で溶融した後、該ハイインパク
トポリスチレン樹脂をＴダイから押出すと共にポリスチ
レン系樹脂高発泡シートと冷却ロールとの間に導き（こ
の時、ハイインパクトポリスチレン樹脂層の厚さは170
μmとなるように押出量を調整した。坪量は170g/mであ
った。）厚さが2.5mm、坪量が400g/m2のシートを作製し
た。Comparative Example 1 Using exactly the same apparatus as in Example 1, only high-impact polystyrene resin was melted in an extruder, and then the high-impact polystyrene resin was extruded from a T-die. (At this time, the thickness of the high-impact polystyrene resin layer is 170
The extrusion amount was adjusted to be μm. The basis weight was 170 g / m. ) A sheet having a thickness of 2.5 mm and a basis weight of 400 g / m 2 was prepared.
【００２４】得られたポリスチレン系樹脂積層シートを
用いて、実施例と全く同様の口径140mm、深さが75mmの
どんぶりに成形したところ、得られたどんぶりの天地強
度は35kgであり、リブ強度は328gであった、また得られ
たどんぶりの曲面印刷性は、印刷面濃度は1.4ポイン
ト、印刷面光沢度は55％であった。印刷面はインキの着
肉性が悪く印刷性に劣るものであった。Using the obtained polystyrene-based resin laminated sheet, a bowl having a diameter of 140 mm and a depth of 75 mm was formed in the same manner as in the example. The bowl strength obtained was 35 kg, and the rib strength was 35 kg. The printed surface of the bowl was 328 g, the printed surface density was 1.4 points, and the printed surface gloss was 55%. On the printed surface, the ink was inferior and the printability was poor.
【００２５】以上の実施例及び比較例の結果から、従来
のものと比べ本発明の積層シートは、ハイインパクトポ
リスチレン樹脂の使用量が少なくなる一方、容器の天地
強度やリブ強度は問題無く且つ容器外側面の曲面印刷性
に優れるものを提供できるということが実証された。From the results of the above Examples and Comparative Examples, the laminated sheet of the present invention uses less high-impact polystyrene resin than the conventional sheet, but has no problem in the vertical strength and rib strength of the container and has no problem. It has been proved that a material having excellent outer surface curved surface printability can be provided.
【００２６】[0026]
【発明の効果】本発明のポリスチレン系樹脂積層シート
は、ポリスチレン系樹脂高発泡シートに熱分解型発泡剤
により形成されるハイインパクトポリスチレン樹脂低発
泡層を積層した構成であるため、深絞り加工性や容器の
天地強度及びリブ強度等の性能は問題無く且つ印刷面の
表面性が良好で適度なクッション性を有するため曲面印
刷性にも優れるものとなる。またハイインパクトポリス
チレン樹脂を発泡させているため使用樹脂量が低減さ
れ、省資源化や環境保護にも貢献できる。The polystyrene-based resin laminated sheet of the present invention has a structure in which a high-impact polystyrene resin low-foaming layer formed by a pyrolytic foaming agent is laminated on a polystyrene-based resin high-foaming sheet. There is no problem in the performance such as the strength of the top and bottom and the strength of the ribs of the container and the container. Also, since high-impact polystyrene resin is foamed, the amount of resin used is reduced, which can contribute to resource saving and environmental protection.
【図１】本発明のポリスチレン系樹脂積層シートの横断
面模式図である。1 is a schematic cross-sectional view of a polystyrene-based resin laminate sheet of the present invention.
【図２】本発明の製造方法に用いる装置の概略図であ
る。FIG. 2 is a schematic view of an apparatus used in the manufacturing method of the present invention.
１ ポリスチレン系樹脂高発泡シート層 ２ ハイインパクトポリスチレン樹脂層 ３ ポリスチレン系樹脂積層シート ４ 加圧ロール ５ 冷却ロール ６ 押出し機 ７ Ｔダイ ８ オリフィス DESCRIPTION OF SYMBOLS 1 Polystyrene type resin highly foamed sheet layer 2 High impact polystyrene resin layer 3 Polystyrene type resin laminated sheet 4 Pressure roll 5 Cooling roll 6 Extruder 7 T die 8 Orifice
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B32B 1/00 - 35/00 B29C 51/00 - 51/46 B29C 47/00 - 47/96 ──────────────────────────────────────────────────続 き Continuation of the front page (58) Field surveyed (Int. Cl. 7 , DB name) B32B 1/00-35/00 B29C 51/00-51/46 B29C 47/00-47/96
Claims (2)
のポリスチレン系樹脂高発泡シート層の一方の面に、厚
さが50〜300μmで発泡倍率が1.1〜2.5倍のハイインパク
トポリスチレン樹脂低発泡層を積層して成る２層構造で
あることを特徴とするポリスチレン系樹脂積層シート。1. A high-expansion sheet having a thickness of 50 to 300 μm and an expansion ratio of 1.1 to 2.5 times on one surface of a polystyrene resin high expansion sheet layer having a thickness of 1.0 to 3.0 mm and an expansion ratio of 5 to 15 times. A polystyrene resin laminated sheet having a two-layer structure formed by laminating a low-impact polystyrene resin foam layer.
解型発泡剤と共に押出機内で溶融混練した後、該ハイイ
ンパクトポリスチレン樹脂組成物をＴダイから大気中に
重力方向に押出すことにより、厚さが1.0〜3.0mmで発泡
倍率が５〜15倍のポリスチレン系樹脂高発泡シート層の
一方の面に厚さが50〜300μmで発泡倍率が1.1〜2.5倍の
ハイインパクトポリスチレン樹脂低発泡層をシート状に
積層して融着し、次いで該ハイインパクトポリスチレン
樹脂低発泡層を冷却することを特徴とするポリスチレン
系樹脂積層シートの製造方法。2. A heat content of high impact polystyrene resin
It was melt-kneaded in an extruder along with a solution foaming agent, by extrusion in the direction of gravity into the atmosphere the high impact polystyrene resin composition from a T-die, a thickness foamed 1.0~3.0mm
The magnification is 5 to 15 times and the thickness of one side of the polystyrene resin high foam sheet layer is 50 to 300 μm and the expansion ratio is 1.1 to 2.5 times.
High impact polystyrene resin low foam layer into sheet
Laminated and fused, and then the production method of the polystyrene-based resin laminate sheet, which comprises cooling the high impact polystyrene resin low foaming layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03290423A JP3075375B2 (en) | 1991-10-11 | 1991-10-11 | Polystyrene resin laminated sheet and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03290423A JP3075375B2 (en) | 1991-10-11 | 1991-10-11 | Polystyrene resin laminated sheet and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0596676A JPH0596676A (en) | 1993-04-20 |
| JP3075375B2 true JP3075375B2 (en) | 2000-08-14 |
Family
ID=17755844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03290423A Expired - Fee Related JP3075375B2 (en) | 1991-10-11 | 1991-10-11 | Polystyrene resin laminated sheet and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3075375B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003267385A (en) * | 2002-03-12 | 2003-09-25 | Kanegafuchi Chem Ind Co Ltd | Molded container |
| JP2010196396A (en) * | 2009-02-26 | 2010-09-09 | Toda Constr Co Ltd | Concrete curing sheet |
| JP6449682B2 (en) * | 2015-02-26 | 2019-01-09 | 株式会社ジェイエスピー | Plate-like polystyrene resin laminated foam |
-
1991
- 1991-10-11 JP JP03290423A patent/JP3075375B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0596676A (en) | 1993-04-20 |
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