JPH0694189B2 - Laminated foam and method for producing the same - Google Patents
Laminated foam and method for producing the sameInfo
- Publication number
- JPH0694189B2 JPH0694189B2 JP3030854A JP3085491A JPH0694189B2 JP H0694189 B2 JPH0694189 B2 JP H0694189B2 JP 3030854 A JP3030854 A JP 3030854A JP 3085491 A JP3085491 A JP 3085491A JP H0694189 B2 JPH0694189 B2 JP H0694189B2
- Authority
- JP
- Japan
- Prior art keywords
- foam
- laminated
- sheets
- foamed
- thickness direction
- 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 - Lifetime
Links
Landscapes
- Laminated Bodies (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱可塑性樹脂発泡シー
トによる積層発泡体とそ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 laminated foam made of a thermoplastic resin foam sheet and a method for producing the same.
【０００２】[0002]
【従来の技術】従来より、熱可塑性樹脂発泡体は、その
断熱性や軽量性等の特性を利用して種々の分野に使用さ
れているが、その用途によっては耐熱性および耐圧強度
を必要とする場合がある。例えば、アイロン台用台板の
芯材として使用する場合には、アイロン使用時の熱およ
び押圧力に耐える耐熱性と耐圧強度を必要とする。2. Description of the Related Art Conventionally, thermoplastic resin foams have been used in various fields by utilizing their properties such as heat insulation and lightweight, but depending on the application, they require heat resistance and pressure resistance. There is a case. For example, when it is used as a core material of a base plate for an ironing board, it is necessary to have heat resistance and pressure resistance to withstand heat and pressing force during use of the iron.
【０００３】耐熱性の点は、ポリエステル系樹脂等の耐
熱性樹脂の発泡体を使用することにより対応できるが、
耐熱性樹脂、例えばポリエステル系樹脂は、厚みの大き
い板状に押出し発泡成形するのは困難なものとされ、せ
いぜい１０mm程度までの厚みのものしか得られない。そ
のためこのような耐熱性樹脂の発泡体板を使用する場合
は、ある程度の厚みに押出し発泡成形した発泡シートを
積層して使用することとしている。The heat resistance can be dealt with by using a foam of a heat resistant resin such as polyester resin.
It is difficult to extrude and foam a heat-resistant resin such as a polyester resin into a plate having a large thickness, and only a resin having a thickness up to about 10 mm can be obtained. Therefore, when such a foam plate made of a heat-resistant resin is used, a foam sheet extruded and foam-molded to a certain thickness is laminated and used.
【０００４】この熱可塑性樹脂発泡シートの積層方法の
代表的なものとして、接着剤を使用するドライラミネー
ション法、あるいは発泡シート表面を加熱軟化させて融
着積層する熱ラミネーション法が知られている。As a typical method of laminating the thermoplastic resin foamed sheet, a dry lamination method using an adhesive or a thermal lamination method of heat-softening the surface of the foamed sheet and fusing and laminating is known.
【０００５】[0005]
【発明が解決しようとする課題】熱ラミネーション法
は、積層される発泡シートの接合面側の表面をホットエ
アー（熱風）の吹付け等の手段により加熱して、軟化溶
融した表面同士を融着一体化させるものであるが、耐熱
性樹脂の発泡シートの場合、この加熱温度をかなり高く
する必要がある上、加熱時の熱が発泡シートの厚み方向
の芯部にまで及び易く、仮に芯部にまで加熱が及ぶと、
発泡シートが波打つような反りや変形を起したりして、
均一な積層製品を得難い欠点がある。In the thermal lamination method, the surfaces of the foamed sheets to be laminated on the joint surface side are heated by a means such as blowing hot air (hot air) to fuse the softened and melted surfaces to each other. In the case of a foamed sheet of heat-resistant resin, it is necessary to raise the heating temperature considerably, and the heat during heating easily reaches the core in the thickness direction of the foamed sheet. When the heating reaches
The foamed sheet may have a wavy warp or deformation,
There is a drawback that it is difficult to obtain a uniform laminated product.
【０００６】また、この種の積層発泡体の用途として、
アイロン台用の台板等のように、若干の押圧力に対して
はそれほど強度を必要としないが、ある程度以上の圧縮
が作用したときには強い耐圧強度が要求される場合があ
る。[0006] Further, as an application of this type of laminated foam,
Although it does not require so much strength for a slight pressing force like a base plate for an ironing board or the like, it may sometimes require strong pressure resistance when a certain amount of compression is applied.
【０００７】本発明は、上記に鑑みてなしたものであ
り、熱可塑性樹脂の発泡シートを積層した発泡体とし
て、反り等のない均一な積層構造をなし、しかも若干の
圧力に対してはやや弱くて、かつある程度以上の圧縮に
対しては良好な耐圧強度を保有する積層発泡体、および
この積層発泡体を容易に得ることのできる製造方法を提
供するものである。The present invention has been made in view of the above, and has a uniform laminated structure without warpage as a foamed body obtained by laminating foamed sheets of thermoplastic resin, and is slightly a little against a slight pressure. It is intended to provide a laminated foam which is weak and has a good compressive strength against compression to a certain extent or more, and a manufacturing method by which the laminated foam can be easily obtained.
【０００８】[0008]
【課題を解決するための手段】上記の課題を解決する本
発明の第１は、複数の熱可塑性樹脂発泡シートを積層し
た発泡体であって、発泡シート全層にわたる厚み方向の
孔が散在状に形成されるとともに、この孔の周囲部が樹
脂化した筒状をなして融着固化せしめられて、各発泡シ
ートが結合されてなる積層発泡体を特徴とする。A first aspect of the present invention for solving the above-mentioned problems is a foam in which a plurality of thermoplastic resin foam sheets are laminated, and holes in the thickness direction are scattered over all layers of the foam sheet. And a peripheral portion of the hole is made into a resinous tubular shape to be fused and solidified, and the foamed sheets are joined together.
【０００９】また本発明の第２は、複数枚の熱可塑性樹
脂発泡シートを積層した前記の積層発泡体を得るための
方法であって、積層すべき発泡シートを重ね合せた状態
で、その所要個所において加熱棒体の押込みにより局部
的に加熱溶融させて発泡シート全層にわたる厚み方向の
孔を形成するとともに、この孔の周囲部を樹脂化させて
筒状に融着一体化させることを特徴とする。A second aspect of the present invention is a method for obtaining the above-mentioned laminated foam body in which a plurality of thermoplastic resin foam sheets are laminated, which is required when the foam sheets to be laminated are stacked. It is characterized in that at the location, the heating rod is pushed to locally heat and melt it to form a hole in the thickness direction over the entire layer of the foamed sheet, and the peripheral part of this hole is made into resin and fused and integrated into a tubular shape. And
【００１０】[0010]
【作用】上記の本発明の積層発泡体によれば、発泡シー
トの積層によって充分な厚みおよび断熱性を保有する
上、特に散在状に形成された厚み方向の孔の周囲部が樹
脂化した筒状をなして融着固化せしめられているので、
各発泡シートがこの樹脂化した筒状部で強固に結合され
る。しかも樹脂化した前記の筒状部があたかも積層発泡
体の厚み方向の圧力に対する補強部の役目を果し、厚み
方向の荷重を筒状部で支えることができ、ある程度以上
の圧縮に対する耐圧強度が向上する。According to the above-mentioned laminated foam of the present invention, a cylinder having sufficient thickness and heat insulation by laminating the foamed sheets, and in particular, a resin-like peripheral portion of the holes in the thickness direction formed in a scattered manner. Since it is made into a shape and fused and solidified,
The foamed sheets are firmly bonded by the resin-made tubular portion. Moreover, the resin-made tubular portion acts as a reinforcing portion against the pressure in the thickness direction of the laminated foam, and the load in the thickness direction can be supported by the tubular portion, and the compressive strength against compression above a certain level is obtained. improves.
【００１１】また、上記した本発明の製造方法の場合、
積層される発泡シートを重ね合せた状態で、その所要個
所において加熱棒体の押込みにより発泡シート全層にわ
たる厚み方向の孔を形成するもので、この孔の周囲部が
溶融樹脂化する結果、筒状をなして融着一体化し、これ
によって各発泡シートが前記樹脂化した筒状部で確実に
結合される。In the case of the manufacturing method of the present invention described above,
With the foamed sheets to be laminated, the holes in the thickness direction are formed over the entire layers of the foamed sheets by pushing in the heating rods at the required places. As a result of the perimeter of these holes becoming molten resin, the cylinder The foamed sheets are fused and integrated with each other, so that the foamed sheets are reliably joined together by the resin-made tubular portion.
【００１２】殊に、加熱棒体を直接発泡シートに押し当
てて局部的に加熱溶融させるので、ポリエステル系樹脂
等の耐熱性樹脂であっても、それほど高い加熱温度を必
要とせず、比較的容易に孔周囲部を樹脂化させて融着一
体化させることができ、前記の積層発泡体を容易に得る
ことができる。しかも加熱棒体による熱が他部分に及ん
で発泡シート全体に反りを生じたり変形することもな
い。In particular, since the heating rod is directly pressed against the foamed sheet and locally heated and melted, even a heat resistant resin such as a polyester resin does not require such a high heating temperature and is relatively easy. Further, the periphery of the hole can be made into a resin to be fused and integrated, and the above-mentioned laminated foam can be easily obtained. Moreover, the heat generated by the heating rod does not affect the other parts and cause warpage or deformation of the entire foam sheet.
【００１３】[0013]
【実施例】次に本発明の実施態様を図面に基いて説明す
る。Embodiments of the present invention will now be described with reference to the drawings.
【００１４】図１は本発明に係る積層発泡体（Ａ）の１
実施例の部分拡大図を示し、図２は同斜視図を示してい
る。この実施例では２枚の発泡シート（Ａ１）（Ａ２）
を積層した積層発泡体（Ａ）の場合を示している。FIG. 1 shows a laminated foam (A) according to the present invention.
The partial enlarged view of an Example is shown and FIG. 2 has shown the perspective view. In this embodiment, two foam sheets (A1) and (A2) are used.
The case of the laminated foam (A) in which the above is laminated is shown.
【００１５】前記の積層発泡体（Ａ）は、発泡シート
（Ａ１）（Ａ２）の全層にわたる厚み方向の孔（１）
が、縦横１方向もしくは両方向に適当な間隔で並列した
散在状、もしくは不規則な散在状に形成されている。特
にこの孔（１）の周囲部が、後述する加熱棒体の押込み
により樹脂化して厚み方向の筒状をなして一体に融着固
化せしめられており、これにより各発泡シート（Ａ１）
（Ａ２）が前記の樹脂化した筒状部（２）により積層状
態に結合されている。The laminated foam (A) has a hole (1) in the thickness direction over all layers of the foam sheets (A1) and (A2).
Are formed in parallel in one vertical or horizontal direction or in both directions at appropriate intervals, or irregularly distributed. In particular, the peripheral portion of the hole (1) is made into resin by pressing a heating rod to be described later to form a tubular shape in the thickness direction and integrally fused and solidified, whereby each foamed sheet (A1) is formed.
(A2) is joined in a laminated state by the resinous tubular portion (2).
【００１６】図３は前記の積層発泡体（Ａ）を製造する
場合の説明図を示している。この図に基いて積層発泡体
（Ａ）の製造方法について次に説明する。FIG. 3 shows an explanatory view in the case of producing the laminated foam (A). The method for producing the laminated foam (A) will be described below with reference to this figure.
【００１７】図３において、積層される熱可塑性樹脂発
泡シート（Ａ１）（Ａ２）は、上下で対をなす送行ガイ
ドロール（３）（４）により重ね合され挟持された状態
で所要長さづつ間欠送行せしめられる。（１０）は加熱
融着工程において発泡シート（Ａ１）（Ａ２）の送行部
分の上方位置に配した加熱手段であり、積層対象の発泡
シートの略全幅に渡る幅を持ったヒータ等による面状熱
源（１１）と、この面状熱源（１１）から垂下した所要
数本の加熱棒体（１２）とからなる。各加熱棒体（１
２）は製造対象の積層発泡体（Ａ）の形態に応じて縦横
１方向もしくは両方向所要間隔の並列状あるいは不規則
に配設され、上記した散在状の孔（１）を形成できるよ
うに設けられる。In FIG. 3, the thermoplastic resin foam sheets (A1) and (A2) to be laminated are separated by a predetermined length in a state of being superposed and sandwiched by the upper and lower paired guide rolls (3) and (4). It can be sent intermittently. (10) is a heating means arranged in the upper position of the feeding portion of the foamed sheets (A1) and (A2) in the heat fusion step, and is a planar shape by a heater or the like having a width extending over substantially the entire width of the foamed sheet to be laminated. It is composed of a heat source (11) and a required number of heating rods (12) hanging from the planar heat source (11). Each heating rod (1
2) are arranged in parallel or irregularly in one direction in the vertical and horizontal directions or at required intervals in both directions depending on the form of the laminated foam (A) to be manufactured, and are provided so that the above-mentioned scattered holes (1) can be formed. To be
【００１８】加熱手段（１０）を構成する面状熱源（１
１）と加熱棒体（１２）とは、積層される発泡シート
（Ａ１）（Ａ２）の間欠送行に対応して、送行停止時に
上下動するように設けられており、下動作用によって両
発泡シート（Ａ１）（Ａ２）に厚み方向の孔（１）を形
成するようになっている。A planar heat source (1) which constitutes the heating means (10)
1) and the heating rod body (12) are provided so as to move up and down when the feeding is stopped, corresponding to the intermittent feeding of the foamed sheets (A1) and (A2) to be laminated. Holes (1) in the thickness direction are formed in the sheets (A1) and (A2).
【００１９】すなわち、重ね合せ状態の両発泡シート
（Ａ１）（Ａ２）の送行停止時における加熱手段（１
０）の下動作用により、両発泡シート（Ａ１）（Ａ２）
の所要個所を加熱棒体（１２）が上方より押圧して、こ
の加熱棒体（１２）の押圧部分を局部的に加熱溶融させ
るとともに、この加熱溶融に伴って加熱棒体（１２）が
さらに押込まれ、この押込みによって両発泡シート（Ａ
１）（Ａ２）の全層にわたる厚み方向の孔（１）を形成
する。しかしてこのようにして形成される孔（１）の周
囲部は、前記加熱棒体（１２）の押込みにより溶融樹脂
化して、厚み方向の筒状をなして融着一体化し固化す
る。That is, the heating means (1) at the time of stopping the feeding of the foamed sheets (A1) and (A2) in the superposed state
0) For downward movement, both foam sheets (A1) (A2)
The heating rod body (12) presses a required portion of the above from above to locally heat and melt the pressed portion of the heating rod body (12), and the heating rod body (12) is further heated by the heating and melting. It is pushed in, and both foam sheets (A
1) Form holes (1) in the thickness direction over the entire layer of (A2). The periphery of the hole (1) thus formed is melted into resin by pushing the heating rod (12), and is fused and integrated into a tubular shape in the thickness direction to be solidified.
【００２０】したがって樹脂化し融着一体化した筒状部
（２）により両発泡シート（Ａ１）（Ａ２）が結合され
積層状態に保持される。さらに必要に応じて、後続の切
断工程においてカッター等の切断手段（１３）により所
定寸法に切断される。これにより図１および図２に示す
積層発泡体（Ａ）が得られる。Therefore, the foamed sheets (A1) and (A2) are joined and held in a laminated state by the tubular portion (2) which is resinified and fused and integrated. Further, if necessary, in a subsequent cutting step, it is cut into a predetermined size by a cutting means (13) such as a cutter. As a result, the laminated foam (A) shown in FIGS. 1 and 2 is obtained.
【００２１】図４は、孔形成による発泡シート積層の他
の実施例を示している。この実施例では、重ね合せ状態
で送られる複数の発泡シート（Ａ１）（Ａ２）に対し、
ロータリー方式の加熱手段（１０）を用いて厚み方向の
孔（１）を形成している。すなわち、回転ロール（１
４）の外周に加熱棒体（１２）を所要間隔の放射状に突
設した加熱手段（１０）を用い、これを発泡シート（Ａ
１）（Ａ２）の送行作用に同期して回転させることによ
り、放射状の加熱棒体（１２）により重ね合せ状態の発
泡シート（Ａ１）（Ａ２）の所要個所を加熱溶融させ
て、上記と同様の孔（１）を形成できるようになってい
る。この場合、発泡シート（Ａ１）（Ａ２）を連続送行
させながら積層できることになる。FIG. 4 shows another embodiment of laminating a foamed sheet by forming holes. In this embodiment, for a plurality of foam sheets (A1) and (A2) sent in a stacked state,
The rotary type heating means (10) is used to form the hole (1) in the thickness direction. That is, the rotating roll (1
A heating means (10) having heating rods (12) radially protruding at required intervals is used on the outer periphery of (4), and the heating means (10) is used to form a foamed sheet (A).
1) By rotating in synchronism with the feeding action of (A2), the radial heating rods (12) heat and melt the required parts of the foamed sheets (A1) and (A2) in the superposed state, and the same as above. The holes (1) can be formed. In this case, the foamed sheets (A1) and (A2) can be stacked while being continuously fed.
【００２２】上記のように、発泡シート（Ａ１）（Ａ
２）を重ね合せた状態で、その所要個所に加熱棒体（１
２）の押込みによる厚み方向の孔（１）を形成するだけ
で、この孔（１）の周囲部を樹脂化させて筒状に融着一
体化させることができ、この筒状部（２）で発泡シート
（Ａ１）（Ａ２）を確実に結合できるため、積層作業が
容易になる。As described above, the foamed sheets (A1) (A
2) are piled up and the heating rod (1
By simply forming the hole (1) in the thickness direction by pushing in (2), the peripheral portion of this hole (1) can be made into resin and fused and integrated into a tubular shape. This tubular portion (2) Since the foamed sheets (A1) and (A2) can be reliably joined together, the laminating work becomes easy.
【００２３】特に、加熱棒体（１２）を直接発泡シート
（Ａ１）（Ａ２）に押し当てて局部的に加熱溶融させる
ので、ポリエチレンテレフタレートあるいはポリブチレ
ンテレフタレートを主成分とするポリエステル系樹脂等
のように、かなり軟化点の高い耐熱性樹脂の発泡シート
の場合においても、それほど高い加熱温度を必要とせ
ず、従来のホットエアー方式による熱ラミネーション法
に比して低い加熱温度で積層することができる。例えば
ポリエステル系樹脂発泡シートの場合、結晶度や発泡倍
率によっても異なるが、結晶度が１５〜３０％のものに
ついては、２３０〜３５０℃程度の温度で加熱溶融させ
て孔の周囲を融着一体化させることができる。In particular, since the heating rod (12) is directly pressed against the foamed sheets (A1) and (A2) to locally heat and melt it, it is possible to use polyethylene terephthalate or polybutylene terephthalate as a main component. In addition, even in the case of a foamed sheet of a heat-resistant resin having a considerably high softening point, it does not require such a high heating temperature and can be laminated at a lower heating temperature as compared with a conventional thermal lamination method using a hot air method. For example, in the case of a polyester-based resin foamed sheet, although it depends on the crystallinity and the foaming ratio, if the crystallinity is 15 to 30%, it is heated and melted at a temperature of about 230 to 350 ° C. to integrally fuse the periphery of the holes. Can be transformed.
【００２４】これにより、せいぜい１０mm弱の厚みにし
か押出し発泡成形することができないとされているポリ
エステル系樹脂の発泡シートをも容易かつ確実に積層で
き、任意の厚みの積層発泡体を容易に得ることができ
る。また加熱棒体（１２）による熱が他部分に及んで発
泡シート全体に反りを生じたり変形することもなく、均
一な積層製品が得られる。As a result, a polyester resin foam sheet, which is said to be extruded and foamed only to a thickness of at most 10 mm, can be easily and surely laminated, and a laminated foam of any thickness can be easily obtained. be able to. In addition, the heat generated by the heating rod (12) does not reach the other portions and warp or deform the entire foamed sheet, and a uniform laminated product can be obtained.
【００２５】しかも上記のようにして得られる積層発泡
体（Ａ）は、散在状に形成された厚み方向の孔（１）の
周囲部の樹脂化して一体化した筒状部（２）が、積層発
泡体（Ａ）の厚み方向の圧力に対する補強部の役目を果
し、厚み方向の荷重を筒状部（２）で支えることがで
き、特に若干の押圧力に対する圧縮強度はわずかに低下
するが、ある程度以上の圧縮が作用したときの耐圧強度
は高くなる。Further, in the laminated foam (A) obtained as described above, the cylindrical portion (2) formed by resinizing and integrating the peripheral portion of the scattered holes (1) in the thickness direction, The laminated foam (A) serves as a reinforcing portion against pressure in the thickness direction, and a load in the thickness direction can be supported by the tubular portion (2), and in particular, the compressive strength against a slight pressing force is slightly reduced. However, the compressive strength increases when a certain amount of compression is applied.
【００２６】次の表１は、厚み方向の孔を有する実施例
製品と、孔なしの従来品とについての下記のとおり圧縮
強度試験を行なった結果を示している。The following Table 1 shows the results of the compressive strength test conducted as follows for the example product having holes in the thickness direction and the conventional product having no holes.
【００２７】・試験片 実施例１〜３および従来品とも、縦横の寸法１００mm、
厚み７mmのポリエチレンテレフタレート樹脂発泡シート
２枚重ね ・孔の形態 実施例１：縦横それぞれ３個列と２個列の千鳥状に１３
個 実施例２：縦横５個の並列状に２５個 実施例３：縦横それぞれ５個列と４個列の千鳥状に４１
個 孔 径 ：４．５mm ・試験方法 ＪＩＳ Ａ ９５１１の試験方法に準じた。Test piece In each of Examples 1 to 3 and the conventional product, the vertical and horizontal dimensions are 100 mm,
Two sheets of polyethylene terephthalate resin foam sheet having a thickness of 7 mm are stacked. Form of holes Example 1: 13 in a zigzag pattern of three rows and two rows each
Example 2: 25 in 5 rows and 5 rows in parallel Example 3: 5 in 4 rows and 4 rows of zigzag 41
Individual hole diameter: 4.5 mm-Test method According to the test method of JIS A 9511.
【００２８】[0028]
【表１】 [Table 1]
【００２９】上記の試験結果から明らかなように、実施
例製品は、従来品に比して、１０％程度までの圧縮時の
強度はやや低くて表面的にはやや柔らかになり、しかも
それ以上の圧縮に対する強度は高くなっている。そのた
め、耐熱性樹脂の発泡シートを素材として、その耐熱性
と前記の耐圧縮性を利用することにより、アイロン台用
の台板等の特異な用途にも充分かつ好適に使用できる。As is clear from the above test results, the product of the example has a slightly lower strength when compressed up to about 10% than the conventional product and becomes slightly soft on the surface, and more than that. The strength against compression is high. Therefore, by using the heat resistance and the compression resistance of the foamed sheet of the heat resistant resin as a material, it can be sufficiently and suitably used for a specific application such as a base plate for an ironing board.
【００３０】なお、上記の例では、２枚の発泡シート
（Ａ１）（Ａ２）を積層する場合において、厚み方向の
孔（１）を貫通させて形成する場合を示したが、図５の
ように完全に孔を開けないで、孔（１）の周囲部を樹脂
化させて有底の筒状に融着一体化させることも、図６の
ように３枚の発泡シート（Ａ１）（Ａ２）（Ａ３）ある
いはそれ以上の複数枚の発泡シートを、上記同様にして
厚み方向の孔（１）を形成してその周囲部を樹脂化して
筒状に融着一体化させることもできる。厚み方向の孔
（１）を貫通させたものの場合は、有孔の積層発泡体と
して、この孔による通気性や通水性を利用した使用が可
能になる。In the above example, when two foam sheets (A1) and (A2) are laminated, the case where the holes (1) in the thickness direction are formed to penetrate is shown. It is also possible to form a resin in the peripheral portion of the hole (1) and fuse and integrate it into a bottomed cylindrical shape without completely forming a hole in the three foam sheets (A1) (A2) as shown in FIG. ) (A3) or a plurality of foamed sheets may be formed in the same manner as described above by forming the hole (1) in the thickness direction, and the peripheral portion thereof may be resinized to be fused and integrated into a tubular shape. In the case where the hole (1) in the thickness direction is penetrated, it is possible to use as a perforated laminated foam by utilizing the air permeability and water permeability of the hole.
【００３１】[0031]
【発明の効果】上記したように本発明の積層発泡体は、
充分な厚みを保有し、発泡体特有の断熱性を保有するば
かりか、特に散在状に存在する厚み方向の孔の周囲部が
樹脂化して筒状をなして融着固化しているために、各発
泡シートが前記の筒状部により強固に結合されるととも
に、この筒状部の補強作用で、従来の積層方法による積
層発泡体に比して、若干の押圧力に対してはやや圧縮強
度が低くなり、しかもある程度以上の圧縮が作用したと
きの耐圧強度が高くなるもので、その用途が拡大する。As described above, the laminated foam of the present invention is
In addition to possessing a sufficient thickness and possessing the heat insulating property peculiar to the foam, in particular, the peripheral portions of the holes in the thickness direction that are scattered are resinified to form a tubular shape and are fused and solidified, The foamed sheets are firmly bonded to each other by the tubular portion, and due to the reinforcing effect of the tubular portion, the compressive strength is slightly higher than the laminated foam produced by the conventional laminating method against a slight pressing force. Is low, and the compressive strength is high when a certain amount of compression is applied, and its applications are expanded.
【００３２】また、本発明の方法によれば、発泡シート
を重ね合せた状態で、その所要個所において加熱棒体の
押込みによる厚み方向の孔を形成するだけで、この孔の
周囲部を樹脂化させて、発泡シートを結合状態に積層で
きるものであり、特に加熱棒体を直接発泡シートに押し
当てて局部的に加熱溶融させるだけであるため、ポリエ
ステル系樹脂等の耐熱性樹脂であっても、それほど高い
加熱温度を必要とせずに孔周囲部を樹脂化させることが
できるとともに、発泡シートに反り等を生じさせること
なく積層でき、前記の耐圧強度を持った積層発泡体を容
易に得ることができる。Further, according to the method of the present invention, in the state where the foamed sheets are overlapped with each other, only the holes in the thickness direction are formed by pushing the heating rod at the required places, and the peripheral portion of the holes is made into resin. In this case, the foamed sheets can be laminated in a bonded state, and in particular, since the heating rod is directly pressed against the foamed sheet and locally heated and melted, even a heat resistant resin such as a polyester resin can be used. , It is possible to resinize the periphery of the hole without requiring a very high heating temperature, and it is possible to stack without causing warping of the foam sheet, and it is possible to easily obtain a laminated foam having the above-mentioned pressure resistance. You can
【図１】本発明の実施例を示す積層発泡体の部分拡大断
面図である。FIG. 1 is a partially enlarged cross-sectional view of a laminated foam body showing an embodiment of the present invention.
【図２】積層発泡体の斜視図である。FIG. 2 is a perspective view of a laminated foam.
【図３】積層発泡体の製造方法の略示説明図である。FIG. 3 is a schematic explanatory view of a method for manufacturing a laminated foam.
【図４】他の実施例による製造方法の略示説明図であ
る。FIG. 4 is a schematic explanatory view of a manufacturing method according to another embodiment.
【図５】積層発泡体の他の例を示す融着結合部分の拡大
断面図である。FIG. 5 is an enlarged cross-sectional view of a fusion-bonded portion showing another example of the laminated foam.
【図６】積層発泡体のさらに他の例を示す融着結合部分
の拡大断面図である。FIG. 6 is an enlarged cross-sectional view of a fusion-bonded portion showing still another example of a laminated foam.
（Ａ）……積層発泡体 （Ａ１）（Ａ２）（Ａ３）……発泡シート （１）……厚み方向の孔 （２）……筒状部 （１０）……加熱手段 （１１）……面状熱源 （１２）……加熱棒体 (A) ... Laminated foam (A1) (A2) (A3) ... Foamed sheet (1) ... Holes in thickness direction (2) ... Cylindrical part (10) ... Heating means (11). Planar heat source (12) …… Heating rod
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ３２Ｂ 31/16 7148−4Ｆ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location B32B 31/16 7148-4F
Claims (2)
た発泡体であって、発泡シート全層にわたる厚み方向の
孔が散在状に形成されるとともに、この孔の周囲部が樹
脂化した筒状をなして融着固化せしめられて、各発泡シ
ートが結合されてなることを特徴とする積層発泡体。1. A foamed body in which a plurality of thermoplastic resin foamed sheets are laminated, wherein holes in the thickness direction are formed in a scattered manner over all layers of the foamed sheet, and the peripheries of the holes are resinized in a tubular shape. A laminated foam, characterized in that the foam sheets are fused and solidified, and the foam sheets are joined together.
する方法であって、積層すべき発泡シートを重ね合せた
状態で、その所要個所において加熱棒体の押込みにより
局部的に加熱溶融させて発泡シート全層にわたる厚み方
向の孔を形成するとともに、この孔の周囲部を樹脂化さ
せて筒状に融着一体化させることを特徴とする積層発泡
体の製造方法。2. A method for laminating a plurality of thermoplastic resin foamed sheets, wherein the foamed sheets to be laminated are stacked and locally heated and melted by pushing a heating rod body at a required portion thereof. A method for producing a laminated foam, which comprises forming a hole in the thickness direction over all layers of a foamed sheet, and resinizing the peripheral portion of the hole so as to be fused and integrated into a tubular shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3030854A JPH0694189B2 (en) | 1991-02-26 | 1991-02-26 | Laminated foam and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3030854A JPH0694189B2 (en) | 1991-02-26 | 1991-02-26 | Laminated foam and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04270643A JPH04270643A (en) | 1992-09-28 |
| JPH0694189B2 true JPH0694189B2 (en) | 1994-11-24 |
Family
ID=12315302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3030854A Expired - Lifetime JPH0694189B2 (en) | 1991-02-26 | 1991-02-26 | Laminated foam and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0694189B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4331467B2 (en) * | 2002-12-04 | 2009-09-16 | ユニチカ株式会社 | Biodegradable lightweight panel with heat resistance |
| PT1815077E (en) * | 2004-11-22 | 2011-03-16 | Knauf Daemmstoffe Gmbh | Thermal insulating board |
| CN105500884B (en) * | 2015-12-29 | 2017-12-12 | 罗瑞尔工业薄膜（昆山）有限公司 | A kind of heat-insulated fresh-keeping film production process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5136306A (en) * | 1974-09-19 | 1976-03-27 | Shigeo Naruse | |
| JPS5493074A (en) * | 1978-10-09 | 1979-07-23 | Tokan Kogyo Co Ltd | Method of making plastics laminate |
-
1991
- 1991-02-26 JP JP3030854A patent/JPH0694189B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5136306A (en) * | 1974-09-19 | 1976-03-27 | Shigeo Naruse | |
| JPS5493074A (en) * | 1978-10-09 | 1979-07-23 | Tokan Kogyo Co Ltd | Method of making plastics laminate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04270643A (en) | 1992-09-28 |
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