JPS6015114A - Synthetic resin cellular material - Google Patents
Synthetic resin cellular materialInfo
- Publication number
- JPS6015114A JPS6015114A JP58123732A JP12373283A JPS6015114A JP S6015114 A JPS6015114 A JP S6015114A JP 58123732 A JP58123732 A JP 58123732A JP 12373283 A JP12373283 A JP 12373283A JP S6015114 A JPS6015114 A JP S6015114A
- Authority
- JP
- Japan
- Prior art keywords
- strips
- cellular material
- group
- density
- multifoam
- 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
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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
- B29C44/468—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length in a plurality of parallel streams which unite during the foaming
-
- 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
- B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
-
- 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
- B29L2031/00—Other particular articles
- B29L2031/22—Hinges, pivots
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
との発明は合成樹脂多泡体に閥し、耐衝撃性が高（撓み
の少ない多泡体を提供しようとしている。DETAILED DESCRIPTION OF THE INVENTION The invention relates to a synthetic resin foam and attempts to provide a foam with high impact resistance (less bending).
従来より多数の発泡樹脂細条を押出して集束結合した多
泡体については、各種のものが見られるが以下のような
問題点があった・
即ち、ポリスチレンのみからなる多泡体の場合は発泡倍
率を上げ易く、細条の融着も良好な反面衝撃に＠く曲げ
られないし、また板状体に対してＶ溝をカット等しても
ヒンジ加工が出来ない欠点がある。次にハイインパクト
ポリスチレンによる場合、衝撃には強（なるが依然ヒン
ジ加工性が不十分であり、ゴム含有分が増えるほど撓み
が太き（なりすぎると共に発泡困難となり、細条の融着
が悪くなるものでありた。さらにポリプロピレンによる
多泡体の場合には、耐衝撃性の点では良好ながら撓みが
非常に大き（なる欠点があった。Conventionally, there are various types of multi-foam bodies made by extruding a large number of foamed resin strips and bonding them together, but they have the following problems. Although it is easy to increase the magnification and the welding of the strips is good, it cannot be easily bent by impact, and it also has the disadvantage that it cannot be hinged even if V-grooves are cut in the plate-shaped body. Next, when using high-impact polystyrene, it is strong against impact (although it still has insufficient hinge workability, and the higher the rubber content, the thicker the bending becomes. Furthermore, in the case of polypropylene foam, although it had good impact resistance, it had the disadvantage of very large flexure.
このような従来技術からも明らかな通り１耐衝撃性を良
（シ、撓みを小さくすることは原理的に相反する性能を
望むようなことで、一つの素材に双方の性能を要求する
ことは困難なこととされていた。As is clear from such prior art, 1) achieving good impact resistance and reducing deflection is, in principle, like wishing for contradictory performances, and it is not possible to require both performances from a single material. It was considered difficult.
以上のごとき技術背景に基づき、本発明者は鋭意研究の
結果各細条に必要な機能を分けて賦与し、さらにそれら
細条間の融着強度を強めることに成功したのである。Based on the above-mentioned technical background, the inventor of the present invention conducted extensive research and succeeded in imparting the necessary functions to each strip separately and further increasing the strength of the fusion bond between the strips.
即ち、この発明の構成については、多数の発泡スチレン
系熱可塑性樹脂細条を押出して集束結合した多泡体であ
って、少なくともその最外周に位置する細条群は全ても
しくは一部の細条が５重量％以上のゴム質重合体を含有
する発泡スチレン系熱可塑性樹脂からなり、多泡体を構
成する細条群の密度はゴム質重合体を含有する発泡スチ
レン系熱可塑性樹脂からなるものがｌ大きく残部は上記
細条群より遠ざかるにつれて略段階的に小さく形成され
ていることを特徴としている。That is, the structure of the present invention is a multifoam body made by extruding and converging a large number of expanded styrene-based thermoplastic resin strips, and at least a group of strips located at the outermost periphery of the strips are formed by all or part of the strips. is made of a foamed styrene thermoplastic resin containing 5% by weight or more of a rubbery polymer, and the density of the strips constituting the multifoam is made of a foamed styrene thermoplastic resin containing a rubbery polymer. is large, and the remaining portions are formed to become gradually smaller as they move away from the group of strips.
上記ゴム質重合体を含有する発泡スチレン系熱可塑性樹
脂としては、ポリスチレンとブタジェン。Examples of the foamed styrene thermoplastic resin containing the rubbery polymer include polystyrene and butadiene.
フ０
イソプレン、クロロピレン、天然ゴム、塩素化ポリエチ
レン等の各種ゴムが１種又は２種以上機械的に混合され
たもの又は共重合されたものを用いることができるが、
・その中でもスチレンとブタジェン及び／又はイソプレ
ンを共重合した熱可塑性エラストマーを用いるのが望ま
しい。One or more types of various rubbers such as isoprene, chloropyrene, natural rubber, and chlorinated polyethylene may be mechanically mixed or copolymerized, but
- Among these, it is desirable to use a thermoplastic elastomer made by copolymerizing styrene with butadiene and/or isoprene.
他方曲げ剛性の強いスチレン系樹脂としては、スチレン
、Ｏｔ−メチルスチレン、！−メチルスチレン等の単独
又は共重合体及びこれ等５０％以上と（メタ）アクリル
酸、無水マレイン酸等とを共重合した樹脂でもよい。On the other hand, examples of styrenic resins with strong bending rigidity include styrene, Ot-methylstyrene,! - A resin obtained by copolymerizing 50% or more of methylstyrene or the like with (meth)acrylic acid, maleic anhydride, etc. may be used.
上記二種の樹脂を別々の細条として押出し発泡させて融
着一体化することになるが、二種の樹脂は同一系統のも
のではあるが、融着は全く同一のもの同士で成形すると
きほど強固にはならない問題が生じる。特に発泡させる
と発泡時に樹脂が冷え気泡膜間の微小接触となるために
その融着は一層弱いものとなることを避は得なかった。The above two types of resin are extruded and foamed as separate strips and then fused and integrated.Although the two types of resin are from the same system, fusion is when molding the completely identical pieces. The problem arises that it is not as strong as it should be. In particular, when foaming occurs, the resin cools during foaming and micro-contact occurs between the cell membranes, which inevitably makes the fusion bond even weaker.
さらに互に隣接する細条間の密度（発泡倍率）差が大き
いほど層間破壊を起し易く、その結果容易に細条が剥離
するものしか得られないわけである。Furthermore, the greater the difference in density (expansion ratio) between adjacent strips, the more likely interlayer failure will occur, and as a result, only products in which strips can easily peel off can be obtained.
しかしながら細条の融着力即ち、接着力は接着面の樹脂
量を多（することと、接着側、被接着側の密度差を小さ
くすれば強化できる。However, the fusion force of the strips, that is, the adhesive force, can be strengthened by increasing the amount of resin on the bonding surface and by reducing the difference in density between the bonding side and the bonded side.
そこで当発明ではこの点に着目して、多泡体の最外周に
位置するゴム質重合体を含有した細条群を第１グループ
とすると、これらのグループを構成する細条群の平均密
度を最も大きクシ（低発泡）、これに隣接する眸件の強
いスチレン系樹脂からなる第２グループの細条群の平均
密度を中程度にしく中発泡）、さらに隣接する第８グル
ープの細条群の平均密度を小さくシ（高発泡）、このよ
うな密度差をつけて繰返したところ、個々の細条間の融
着強度が改善されることを確認した。Therefore, in the present invention, we focused on this point, and assuming that the strips containing the rubbery polymer located at the outermost periphery of the multifoam are the first group, the average density of the strips constituting these groups is calculated as follows: The largest comb (low foaming), the adjacent second group of strips made of strong styrene resin with medium density (medium foaming), and the eighth group of strips adjacent thereto. By reducing the average density (high foaming) and repeating the process with such density differences, it was confirmed that the fusion strength between individual strips was improved.
このとき、ゴム質重合体を含有した最も密度の大きい細
条群は成形品最外周の全周にわたって存在しても良＜、
１−１＃＝↓又成型品の一部所望面にのみ存在していて
も良い。At this time, the group of strips containing the rubbery polymer with the highest density may be present all around the outermost periphery of the molded product.
1-1#=↓Also, it may exist only on a part of the desired surface of the molded product.
この最外周の一部に存在される場合、最外周の全細条の
２０容量％以上にするのが好ましい。If it is present in a part of this outermost circumference, it is preferably 20% by volume or more of all the strips in the outermost circumference.
この発明にて提供しようとする目的の細条について密度
を調整するには個々の樹脂組成物における発泡剤量を調
整することはもとより押出成形装置における口金の小孔
の分布、深さ、直径を変えたり、口金の出口付近で細条
を局部的に加熱又は冷却して調整することができる。In order to adjust the density of the target strips provided by this invention, it is necessary not only to adjust the amount of blowing agent in each resin composition, but also to adjust the distribution, depth, and diameter of the small holes in the extrusion molding device. It can be adjusted by heating or cooling the strip locally near the outlet of the mouthpiece.
次いで、この発明の実施態様について図を参照しながら
以下に例示する。Next, embodiments of the present invention will be illustrated below with reference to the drawings.
Ｏ■は多数の発泡スチレン系樹脂細条を押出して集束結
合した多泡体の全体を指しており、（１１１は多泡体０
口）のうちのゴム質重合体を含有した細条群、（１２１
１３＋・・・は残部の各細条群を示し、０ｚはｉ］１）
に隣接するもの、０３）はＱ２１に隣接するものである
。O■ refers to the entire foam made by extruding and converging a large number of expanded styrene resin strips, (111 is the foam 0
A group of strips containing a rubbery polymer of (121)
13+... indicates each remaining strip group, 0z is i]1)
03) is adjacent to Q21.
そして図示する具体例によると、第１図に示す場合では
、多泡体ｕＯ）のゴム質重合体を含有した細条群Ｕｔ＋
は５重量％以上のゴム質重合体を含有する発泡スチレン
系熱可塑性樹脂からなっている。まゴ。According to the illustrated example, in the case shown in FIG. 1, the group of strips Ut+ containing the rubbery polymer of the multifoam uO)
is made of a foamed styrene thermoplastic resin containing 5% by weight or more of a rubbery polymer. Mago.
た多発泡体（１（Ｉ＋の細条群（１１） （１２１ｆ１
３１・・・の密度はユム質重合体を含有した細条群Ｑｌ
ｌが最も大きく残部は上記細条群［１１）より遠ざかる
につれて段階的に小さくなるようにしである。例えば
細条群■ −ブタジェンを２７％含有したスチレン、ブ
タジェン樹脂（例え
はＰｈ１ｌｌｉｐｓ Ｐｅｔ、会社製のにレジン）を密
度０．６Ｆ／ＣＣに発泡さ
せた細条
細条群Ｏ２−ポリスチレン（例えば旭化成会社製のスタ
イロン＃６６６ ）を密
度０．４５グ／ＣＣに発泡させた細条
細条群（１３） −細条群（１２１と同質のものを密度
０．３Ｐ／笠に発泡させた細条
で構成する。multiple foams (1 (I+ stripe group (11) (121f1
The density of 31... is the strip group Ql containing the Yum polymer.
l is the largest, and the remaining portions become smaller stepwise as they move away from the strip group [11]. For example, strip group ■ - styrene containing 27% butadiene, strip group O2-polystyrene (for example, Asahi Kasei Co., Ltd.) made by foaming butadiene resin (for example, Ph1llips Pet, Ni resin manufactured by the company) to a density of 0.6F/CC. Strip group (13) made by foaming Styron manufactured by the company (#666) to a density of 0.45 g/CC - Strip group (strips made by foaming the same material as 121 to a density of 0.3 P/shade) Consists of.
次に第２図に示すものは多泡体（１０１のゴム質重合体
を含有した突条群０１）が成型品の最外周全周にわたっ
て存在している場合である。例えば細条群（１１） −
ゴム分を７％含有したスチレン系樹脂（例えば５ｈｅｌ
ｌ化学会社
製カリフレックス）とポリスチ
レン（例えば前記スタイロン＃
６６６）とを重量比２０：８０で混
和したものを密度０．５９７ｃｃに発
泡させた細条
細条群（１２１−ポリスチレン（例えば前記スタイロン
＄６６６ ）を密度０．８５ＬｉＡに発泡させた細条
で構成する。Next, what is shown in FIG. 2 is a case where the multifoam body (projection group 01 containing the rubbery polymer 101) exists over the entire outermost periphery of the molded product. For example, strip group (11) −
Styrenic resin containing 7% rubber (e.g. 5hel)
A group of strips (121-polystyrene (e.g., Styron #666) made by foaming a mixture of 121-polystyrene (Cariflex, manufactured by Kagaku Kogyo Co., Ltd.) and polystyrene (e.g., Styron #666) at a weight ratio of 20:80 to a density of 0.597 cc. 666) foamed to a density of 0.85 LiA.
さらに第８図の場合は、多泡体口０）の最外周に位置す
る細条群の一部に、ゴム質重合体を含有する発泡スチレ
ン系熱可塑性樹脂で構成した細条ＯＤとゴム質重合体を
含有しない細条（１２）か交互に存在した場合であり、
第４図の場合は細条群１１１の各細条の一部に前記ゴム
質重合体含有部分を混和せずに存在する場合、第５図の
場合は最外周に位置する細条群口１）はゴム質重合体に
て構成し、これと異なる位置の細条群（１１１の各細条
一部に前記ゴム質重合体が混和しないで存在させた場合
を示している。Furthermore, in the case of Fig. 8, a part of the group of strips located at the outermost periphery of the multi-foam mouth 0) includes a strip OD made of foamed styrene thermoplastic resin containing a rubbery polymer and a rubbery strip OD. This is the case where strips (12) not containing the polymer are present alternately,
In the case of FIG. 4, the rubbery polymer-containing portion is present without being mixed in a part of each strip of the strip group 111, and in the case of FIG. 5, the strip group opening 1 located at the outermost periphery ) is composed of a rubbery polymer, and shows the case where the rubbery polymer is present in a part of each strip group (111) at a different position from this without being mixed.
これら第８図〜第５図の場合にも細条群の密度はゴム質
重合体を含有したものが大きく残部へは前記同様略段階
的に小さく形成されている。In the case of these FIGS. 8 to 5 as well, the density of the strips containing the rubbery polymer is large, and the density of the remaining strips is reduced substantially stepwise as described above.
何れの場合も、その構成上耐衝撃性か高く、撓みの少な
い融着強度の高い多泡体として実施できた。In either case, the foam material had high impact resistance due to its structure, and was able to be implemented as a multifoam material with high fusion strength and little deflection.
上記のごとき構成を有するこの発明による多泡体は例え
ば第６図のごとき板状の周…１］枠（んとして形成し、
最内周の側から適宜間隔毎にｖ形のコーナー用折曲溝（
、）を形成し、この溝の外側となる最を構成することが
できる。The multifoam body according to the present invention having the above-mentioned configuration is formed, for example, as a plate-shaped circumferential frame as shown in FIG.
V-shaped corner bending grooves (
, ), and the outside of this groove can be configured.
上記のごとき用途にこの発明の多泡体を活用した場合、
特に折曲用溝（、）の外側となる薄肉のヒンジ部分（ｈ
） Ｋついてはゴム質重合体を含有する細条によってポ
リスチレン糸樹脂特有の剛性が柔らげられ、耐衝撃性か
冒くなり、ヒンジ強度が増大し、折曲した場合の割れ等
の発生防止に好適となる０庭
そのほか最外面は姥が付告難くなるばかシか、最外面の
すべり防止の点でも好都合となる。さらにゴム質重合体
を含有した細条を最外周に対して交′Ｉｉに存在させて
実施した場合（特に第３図）、非常に雅趣のある独特の
木質Ｉ８を出すことかでき外村
観上も箭新且つ良好なものが提供できる。When the multifoam of this invention is used for the above purposes,
Especially the thin hinge part (h) that is outside the bending groove (,)
) Regarding K, the rigidity peculiar to polystyrene thread resin is softened by the strips containing a rubbery polymer, which reduces impact resistance, increases hinge strength, and is suitable for preventing cracks from occurring when bent. In addition, the outermost surface will be difficult to attach, and it will also be convenient in terms of preventing the outermost surface from slipping. Furthermore, when strips containing a rubbery polymer are placed at intersections with the outermost periphery (particularly as shown in Figure 3), a very elegant and unique wood I8 can be produced. We can also provide new and good quality products.
約
その他多泡体を種々の用途に用いて、折記した耐衝撃性
の強化と撓みが少なく細条相互の融着性の高い作用効果
を活かせる。The multifoam material can be used for various purposes to take advantage of its enhanced impact resistance, less deflection, and high adhesion between strips.
第１図〜第５図はこの発明による多泡体のそれぞれ実施
例を示す切断斜視図、第６図はこの発明による多泡体の
用途例として周側枠を示す斜視図、第７図は削口の周側
枠を用いた箱の斜視図である。
σ１１ ［１１１・・・ゴム質重合体を含有する細条を
有する細条群
（１２＋ （１３１圓・・・他の細条群。
区
トを
区
Ｕ）FIGS. 1 to 5 are cutaway perspective views showing embodiments of the multifoam according to the present invention, FIG. 6 is a perspective view showing a peripheral frame as an example of the use of the multifoam according to the present invention, and FIG. FIG. 3 is a perspective view of a box using a peripheral frame of a cutting hole. σ11 [111...Strip group having strips containing a rubbery polymer (12+ (131 round...Other strip groups. Ward to Ward U)
Claims (1)
て集束結合した多泡体であって、少な（ともその最外周
に位置する細条群は全て、もしくは一部の細条が５重量
％以上のゴム質重合体を含有する発泡スチレン系熱可塑
性樹脂からなり、多泡体を構成子る細条群の密度はゴム
質重合体を含有する発泡スチレン系熱ψ 可塑性樹脂からなるもの大きく残部は上記細条群より遠
ざかるにつれて略段階的に小さく形成されていることを
特徴とする合成樹脂多泡体。 λ 最外周に位置する細条群のゴム質重合体が、ブタジ
ェン及び／又はイソプレンを含有したものからなる上記
特許請求の範囲第１項記載の合成樹脂多泡体。[Scope of Claims] 1. A multifoam body made by extrusion foaming a large number of styrene-based thermoplastic resin strips and converging them together, in which a small number of strips (all or part of the strips located at the outermost periphery) The strips are made of a foamed styrene thermoplastic resin containing 5% by weight or more of a rubbery polymer, and the density of the strips constituting the multifoam is equal to the foamed styrene thermoplastic resin containing a rubbery polymer. A synthetic resin multifoam body characterized in that one part is made of a plastic resin, and the remaining part is formed into a substantially stepwise smaller size as it gets farther away from the strip group. , butadiene and/or isoprene as claimed in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58123732A JPS6015114A (en) | 1983-07-06 | 1983-07-06 | Synthetic resin cellular material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58123732A JPS6015114A (en) | 1983-07-06 | 1983-07-06 | Synthetic resin cellular material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6015114A true JPS6015114A (en) | 1985-01-25 |
| JPS6260255B2 JPS6260255B2 (en) | 1987-12-15 |
Family
ID=14867971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58123732A Granted JPS6015114A (en) | 1983-07-06 | 1983-07-06 | Synthetic resin cellular material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6015114A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6034329A (en) * | 1983-07-28 | 1985-02-21 | 積水化成品工業株式会社 | Side material for prefabricated box |
| US6197233B1 (en) | 1997-12-08 | 2001-03-06 | The Dow Chemical Company | Method of forming low density strand foams |
| US6258865B1 (en) | 1999-06-17 | 2001-07-10 | The Dow Chemical Company | Polymer foam and method of making using oil-containing furnace black as an insulation enhancer |
| WO2003037599A1 (en) * | 2001-11-01 | 2003-05-08 | Dow Global Technologies Inc. | Bendable polymeric foam with a reinforced slit |
| US6844055B1 (en) | 1999-12-02 | 2005-01-18 | Dow Global Technologies Inc. | Hollow strandfoam and preparation thereof |
-
1983
- 1983-07-06 JP JP58123732A patent/JPS6015114A/en active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6034329A (en) * | 1983-07-28 | 1985-02-21 | 積水化成品工業株式会社 | Side material for prefabricated box |
| US6197233B1 (en) | 1997-12-08 | 2001-03-06 | The Dow Chemical Company | Method of forming low density strand foams |
| US6258865B1 (en) | 1999-06-17 | 2001-07-10 | The Dow Chemical Company | Polymer foam and method of making using oil-containing furnace black as an insulation enhancer |
| US6844055B1 (en) | 1999-12-02 | 2005-01-18 | Dow Global Technologies Inc. | Hollow strandfoam and preparation thereof |
| US7300612B2 (en) | 1999-12-02 | 2007-11-27 | Dow Global Technologies Inc. | Hollow strandfoam and preparation thereof |
| WO2003037599A1 (en) * | 2001-11-01 | 2003-05-08 | Dow Global Technologies Inc. | Bendable polymeric foam with a reinforced slit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6260255B2 (en) | 1987-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5206082A (en) | Nondistorted polyethylene foam structures and process for making | |
| US7915346B2 (en) | Impact modified acrylics having a bimodal distribution of impact modifier sizes | |
| CA2078123A1 (en) | Polypropylene foam sheets | |
| EP0960904A4 (en) | Expandable polystyrene resin beads, process for the preparation of them, and foam made by using the same | |
| CA2150018A1 (en) | Open cell polypropylene foam and process for making same | |
| JPS6015114A (en) | Synthetic resin cellular material | |
| JP2620968B2 (en) | How to make a foam structure | |
| JPH06505935A (en) | Non-deformable polyolefin foam structure and method for producing the same | |
| JP4257809B2 (en) | Foam sheet for thermoforming and container for fruit vegetables | |
| JPH11236461A (en) | Resin foamed sheet and container | |
| RU99128038A (en) | BOTTLE FORMED BY EXTRUSION WITH BLOWING, AND ALSO WAY AND MATERIAL FOR ITS PRODUCTION | |
| JP2005145047A (en) | Multilayer foamed polystyrene resin | |
| JP4063374B2 (en) | Synthetic resin foam sheet and container | |
| JPS6034329A (en) | Side material for prefabricated box | |
| JP2000263624A (en) | Manufacture of extrusion foamed composite, and foamed composite | |
| JPH11129369A (en) | Synthetic resin foam sheet and its manufacture | |
| JPH10226729A (en) | Polyethylene resin mixture foam and production thereof | |
| JP4434382B2 (en) | Manufacturing method of polystyrene resin foam sheet | |
| JP2001293822A (en) | Thermoforming polystyrenic resin multilayered foamed sheet | |
| JP2969586B2 (en) | Extruded styrene polymer resin foam sheet | |
| JPS6320687B2 (en) | ||
| JPH10130416A (en) | Polypropylene resin foam | |
| JP2019025858A (en) | Polystyrene-based resin laminate foam sheet and packaging container | |
| JPH0472159A (en) | Packaging material and hollow formed laminate plate | |
| JPS6140146A (en) | Manufacture of crosslinked laminate |