JP3056760B2 - Method for producing cylindrical crosslinked foam - Google Patents
Method for producing cylindrical crosslinked foamInfo
- Publication number
- JP3056760B2 JP3056760B2 JP2018024A JP1802490A JP3056760B2 JP 3056760 B2 JP3056760 B2 JP 3056760B2 JP 2018024 A JP2018024 A JP 2018024A JP 1802490 A JP1802490 A JP 1802490A JP 3056760 B2 JP3056760 B2 JP 3056760B2
- Authority
- JP
- Japan
- Prior art keywords
- foaming
- steam
- cylindrical
- foam
- foamed
- 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
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
- B29C44/56—After-treatment of articles, e.g. for altering the shape
- B29C44/5627—After-treatment of articles, e.g. for altering the shape by mechanical deformation, e.g. crushing, embossing, stretching
- B29C44/5654—Subdividing foamed articles to obtain particular surface properties, e.g. on multiple modules
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は所定の径を有する独立気泡を持った円筒形の
架橋発泡体を簡単にかつくり返し製造することが出来る
架橋発泡体の製造方法に関するものである。Description: TECHNICAL FIELD The present invention relates to a method for producing a crosslinked foam capable of easily and repeatedly producing a cylindrical crosslinked foam having closed cells having a predetermined diameter. Things.
＜従来の技術＞ 従来の長尺発泡シートを製造する方法としては、例え
ば特開昭55−17510号公報に示す技術が公知である。<Conventional technology> As a conventional method for producing a long foamed sheet, for example, a technology disclosed in JP-A-55-17510 is known.
この技術は波状のポリウレタン原液をそのまま使用す
る発明であり、かつこのポリウレタン原液を回転自在に
設置した円筒形発泡型に直接供給し、該発泡型に供給さ
れた原液を回転させながら常圧発泡法を用いて発泡させ
てポリウレタンフォームの円筒形ブロックを成形し、更
にこのようにして成形された円筒形ブロックの表面を切
削刃によってピーリングして長尺発泡シートを連続的に
製造する方法である。This technology is an invention that uses a wavy undiluted polyurethane solution as it is, and directly supplies this undiluted polyurethane solution to a rotatably installed cylindrical foaming mold, and rotates the undiluted solution supplied to the foaming mold to a normal pressure foaming method. This method is a method of forming a cylindrical block of polyurethane foam by foaming using the method described above, and peeling the surface of the cylindrical block thus formed with a cutting blade to continuously produce a long foamed sheet.
＜発明が解決しようとする課題＞ 然るに、前述の公知技術に於いては、発泡型にポリウ
レタン発泡原液を充填し、且つこの発泡原液を回転させ
ながら常圧発泡法で発泡させるために、独立気泡をもた
ないポリウレタンフォームしか成形出来ない問題があっ
た。<Problems to be Solved by the Invention> However, in the above-mentioned known technology, a foaming mold is filled with a polyurethane foaming stock solution, and the foaming stock is rotated to form a foam by a normal pressure foaming method. However, there is a problem that only a polyurethane foam having no foam can be molded.
かつ、前記公知技術に於いては、液状のポリウレタン
原液がそのまま使用され、発泡助剤が用いられず、更に
常圧発泡で発泡されるので、大径の発泡体を製造するこ
とが困難である問題もあった。Further, in the above-mentioned known technique, a liquid polyurethane undiluted solution is used as it is, no foaming aid is used, and further foaming is performed under normal pressure, so that it is difficult to produce a large-diameter foam. There were also problems.
本発明に係る円筒形架橋発泡体は、前述の従来の問題
点に鑑み開発された全く新しい発明であって、特に外周
壁に多数のスチーム孔が設けられた上下部金型を使用し
てその内部に円筒形凹所を形成し、この凹所内にポリオ
レフィン系樹脂、熱分解型発泡剤、架橋剤、発泡助剤等
を混練した発泡性コンパウンド等を充填し、更に、該凹
所内にスチームパイプを挿通し、前記スチーム孔とスチ
ームパイプとにスチームを供給して金型を加熱加圧して
独立気泡構造を有する架橋発泡体を製造する技術を提供
するものである。The cylindrical cross-linked foam according to the present invention is a completely new invention developed in view of the above-mentioned conventional problems, and particularly, by using upper and lower molds provided with a large number of steam holes in the outer peripheral wall. A cylindrical recess is formed inside, and a polyolefin resin, a pyrolytic foaming agent, a cross-linking agent, a foaming compound or the like, which is kneaded with a foaming aid, are filled in the recess, and a steam pipe is further filled in the recess. And supplying steam to the steam hole and the steam pipe to heat and press the mold to produce a crosslinked foam having a closed cell structure.
＜課題を解決するための手段＞ 本発明に係る円筒形架橋発泡体は前述の従来の問題点
を鑑み開発された発明であって、その発明の要旨は、内
部に半円筒形凹所を有しかつ外周壁内に多数のスチーム
孔が夫々設けられかつその両端縁にスチームパイプ挿入
用くぼみが設けられた上下部金型を合わせることによっ
て形成される円筒形凹所内に、ポリオレフィン系樹脂と
熱分解発泡剤、架橋剤、発泡助剤等とを混練した発泡性
コンパウンド或いは該コンパウンドを加熱されたシーテ
ィングロールで成形した発泡用シートを充填し、かつ上
下部金型によって形成される前記円筒形凹所内の中心部
にスチームパイプを挿通し、前記上下部金型のスチーム
孔と前記スチームパイプとにスチームを供給して上下部
金型を加熱加圧することによって独立気泡構造を有する
架橋発泡体を製造することを特徴とした円筒形架橋発泡
体の製造方法である。<Means for Solving the Problems> The cylindrical cross-linked foam according to the present invention is an invention developed in view of the above-mentioned conventional problems, and the gist of the invention is that a semi-cylindrical recess is provided inside. The polyolefin resin and heat are introduced into a cylindrical recess formed by combining upper and lower molds each having a plurality of steam holes formed in the outer peripheral wall and having steam pipe insertion recesses at both end edges thereof. Filling a foaming compound obtained by kneading a decomposition foaming agent, a crosslinking agent, a foaming aid, or the like, or a foaming sheet formed by heating the compound with a heated sheeting roll, and forming the cylindrical recess formed by upper and lower dies. A steam pipe is inserted into the center of the place, steam is supplied to the steam holes of the upper and lower molds and the steam pipe, and the upper and lower molds are heated and pressurized to close the closed cell structure. A method for producing a cylindrical crosslinked foam, characterized by producing a crosslinked foam having a structure.
＜作用＞ 本発明に於いては、固形状のポリオレフィン系樹脂に
発泡剤、架橋剤及び発泡助剤等を混練して発泡性コンパ
ウンドを作るので、発泡を均一にすることが出来る。<Function> In the present invention, a foaming compound is prepared by kneading a foaming agent, a cross-linking agent, a foaming aid, and the like with a solid polyolefin resin, so that foaming can be uniform.
また、発泡性コンパウンドを発泡させるに当たって
は、上下部金型の夫々の外周壁に設けられた多数のスチ
ーム孔と、金型内の中心部に挿通されたスチームパイプ
とにスチームを供給して前記発泡性コンパウンドを発泡
させるので、金型自体の外周壁とその凹所の中心部とを
同時に確実に加熱することが出来、内部迄が均一に発泡
された独立気泡構造を有する大径の円筒形発泡体を確実
に成形することが出来る。Further, in foaming the foamable compound, steam is supplied to a number of steam holes provided in each outer peripheral wall of the upper and lower molds and a steam pipe inserted into the center of the mold. Since the foaming compound is foamed, the outer peripheral wall of the mold itself and the center of the recess can be heated at the same time, and the inside of the mold is uniformly foamed. The foam can be reliably formed.
＜実施例＞ 図により本発明に係る製造方法の一実施例を具体的に
説明すると、第１図は発泡円筒体をピーリングして発泡
シートを製造する状態を示す斜視図、第２図（Ａ），
（Ｂ），（Ｃ）は配合材料を混練した後でシーティング
する工程の説明図、第３図（Ａ），（Ｂ）は成形金型の
斜視説明図、第４図（Ａ），（Ｂ）及び第５図（Ａ），
（Ｂ），（Ｃ）は夫々成形金型で発泡円筒体を成形する
工程を示す説明図である。<Example> One embodiment of the manufacturing method according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a state in which a foamed cylindrical body is peeled to produce a foamed sheet, and FIG. ),
(B) and (C) are explanatory views of a sheeting process after kneading the compounding materials, FIGS. 3 (A) and (B) are perspective explanatory views of a molding die, and FIGS. 4 (A) and (B). ) And 5 (A),
(B), (C) is an explanatory view showing a step of molding a foamed cylindrical body with a molding die.
本発明に於いては、例えば次のような配合例で配合し
た発泡材料を原料として、第２図（Ａ）に示すように、
この原料１を秤量してニーダー２の中に充填し、90〜13
0℃で加熱しながら３〜20分間混練してコンパウンド３
を形成する。In the present invention, for example, as shown in FIG. 2 (A), a foam material blended in the following blending example is used as a raw material.
This raw material 1 is weighed and filled into a kneader 2 and 90 to 13
Kneading for 3-20 minutes while heating at 0 ° C, compound 3
To form
更に同図（Ｂ）に示すように混練して形成されたコン
パウンド３を、80〜130℃に加熱されたシーティングロ
ーラ４によって更に混練した後でシーティングして、同
図（Ｃ）に示す如き所定の寸法を持った発泡用シート５
を得る。Further, the compound 3 formed by kneading as shown in FIG. 3B is further kneaded by a sheeting roller 4 heated to 80 to 130 ° C., and then sheeted to obtain a predetermined compound as shown in FIG. Foaming sheet 5 with dimensions of
Get.
発泡の配合例 PEorEVA 100PHR 炭酸カルシウム ０〜100 発泡剤 １〜10 架橋剤 0.5〜５ 発泡助剤 １〜15 滑剤 0.5〜５ また、本発明に於いては、第３図（Ａ），（Ｂ）に示
す如く、円筒体を成形し得る上部金型6aと下部金型6bと
を別に用意する。該上部金型6a及び下部金型6bの内部に
は夫々半円筒形凹所7a,7bが穿設され、かつこの凹所7a,
7bの周りには多数のスチーム孔８が穿孔されている。Formulation Examples of Foaming PEorEVA 100 PHR Calcium carbonate 0-100 Foaming agent 1-10 Crosslinking agent 0.5-5 Foaming aid 1-15 Lubricant 0.5-5 In the present invention, FIGS. 3 (A) and 3 (B) 2), an upper mold 6a and a lower mold 6b capable of forming a cylindrical body are separately prepared. Inside the upper mold 6a and the lower mold 6b, semi-cylindrical recesses 7a, 7b are respectively formed, and the recesses 7a, 7b are formed.
A number of steam holes 8 are drilled around 7b.
上下部金型6a,6bの両端縁には、図に明らかなように
後述のスチームパイプ９を挿入する凹所が設けられてい
る。At both ends of the upper and lower molds 6a and 6b, recesses for inserting a steam pipe 9 to be described later are provided as is apparent in the figure.
９はスチームパイプであって、合わされた上下部金型
6a,6bの中心部に取り外し自在に挿通されており、成形
時にはこのスチームパイプ９にスチームを供給すること
によって２個の半円筒形凹所7a,7bで成形される発泡円
筒体の芯部を加熱成形し得るように構成されている。9 is a steam pipe, which is a combined upper and lower mold
At the time of molding, the core of the foamed cylinder formed by the two semi-cylindrical recesses 7a, 7b is supplied by supplying steam to the steam pipe 9 at the time of molding. It is configured to be heat-moldable.
次に前述の如き構造を有する上下部金型6a,6bを夫々
第４図（Ａ）に示す如く、加圧プレス機10a,10bに取付
け、更に同図（Ｂ）に示す如く、予め150〜200℃に加熱
された下部金型6b内に発泡用シート５を充填する。この
発泡用シート５は前記２個の半円筒形凹所7a,7bで成形
される円筒形空洞部の内容積とほぼ等量になる迄充填さ
れる。Next, the upper and lower dies 6a, 6b having the above-mentioned structure are attached to the press presses 10a, 10b as shown in FIG. 4 (A), respectively, and further, as shown in FIG. The foaming sheet 5 is filled in the lower mold 6b heated to 200 ° C. The foaming sheet 5 is filled until the inner volume of the two semi-cylindrical recesses 7a and 7b is substantially equal to the inner volume of the cylindrical cavity formed by the recesses 7a and 7b.
発泡用シート５の充填が完了したら、第５図（Ａ）に
示す如く上下部金型6a,6bを加圧プレス機10a,10bを介し
て密閉状態にし、かつ上下部金型6a,6bの凹所7a,7b内の
空気が抜けるように徐々にプレス圧力を上げ、最終的に
は100〜200kg/cm2の圧力を掛けると共に、スチーム孔８
及びスチームパイプ９にスチームを供給して１〜６時間
加熱加圧することによって、同図（Ｂ）に示す如き発泡
体11を成形し、同図（Ｃ）に示す如く、この発泡円筒体
11を上下部金型6a,6bから外方に取り出すことが出来
る。When the filling of the foaming sheet 5 is completed, the upper and lower dies 6a, 6b are closed through the presses 10a, 10b as shown in FIG. 5 (A), and the upper and lower dies 6a, 6b are closed. The press pressure is gradually increased so that the air in the recesses 7a and 7b escapes, and finally a pressure of 100 to 200 kg / cm 2 is applied.
By supplying steam to the steam pipe 9 and heating and pressurizing for 1 to 6 hours, a foam 11 as shown in FIG. 1B is formed, and as shown in FIG.
11 can be taken out from the upper and lower dies 6a, 6b.
上述の如く、成形された発泡円筒体11を今度は第１図
に示す如く、ピーリング装置の回転台12に取付けながら
この発泡円筒体11を一定の時間で矢印方向に回転させ
る。13はピーリング装置の切削刃であって、偏平リング
形状を保ち、前記回転台12に取付けられて回転する発泡
円筒体11の回転方向と直交する方向に回転されながら、
該発泡円筒体11の表面を0.5〜10mm厚に徐々にピーリン
グしてエンドレス状の長尺発泡シート14を次々に製造す
ることが出来る。As described above, the foamed cylindrical body 11 is rotated in the direction of the arrow for a certain period of time while attaching the molded foamed cylindrical body 11 to the turntable 12 of the peeling device as shown in FIG. 13 is a cutting blade of the peeling device, while maintaining a flat ring shape, while being rotated in a direction orthogonal to the rotation direction of the rotating foamed cylindrical body 11 attached to the rotating table 12 and rotating,
By gradually peeling the surface of the foamed cylindrical body 11 to a thickness of 0.5 to 10 mm, endless long foamed sheets 14 can be manufactured one after another.
上記実施例に於いては、成形品の気泡が細かく滑らか
でかつ均一にする為には発泡原料１を混練したコンパウ
ンド３から発泡用シート５を作り、その後でこの発泡用
シート５を上下部金型6a,6bの凹所7a,7bに充填したが、
製品の品質をそれ程問題にしない場合には、コンパウン
ド３をそのまま凹所7a,7bに充填することも可能であ
る。In the above embodiment, in order to make the foam of the molded product fine, smooth and uniform, a foaming sheet 5 is prepared from the compound 3 in which the foaming raw material 1 is kneaded. Filled the recesses 7a, 7b of the molds 6a, 6b,
If the quality of the product does not matter so much, the compound 3 can be directly filled into the recesses 7a and 7b.
上記長尺発泡シート14の長さを大きくする為には、発
泡円筒体11の径を大きくすれば良く、現状の技術に於い
ては約300〜1,000mmの径を持った発泡円筒体11を成形す
ることが可能である。In order to increase the length of the long foam sheet 14, the diameter of the foamed cylinder 11 may be increased, and in the current technology, a foamed cylinder 11 having a diameter of about 300 to 1,000 mm is used. It is possible to mold.
上記実施例の如く、上下部金型6a,6bの凹所7a,7bの中
心にスチームパイプを挿通して加工するので、発泡円筒
体11の内部迄の均一に発泡した成形品を短時間で成形す
ることが出来る。As in the above embodiment, since the steam pipe is inserted into the center of the recesses 7a and 7b of the upper and lower molds 6a and 6b and processed, the molded product that has been uniformly foamed up to the inside of the foamed cylindrical body 11 can be formed in a short time. Can be molded.
＜発明の効果＞ 本発明の方法に於いては、先ず固形状のポリオレフィ
ン系樹脂と、発泡材、架橋剤及び発泡助剤等とを混合し
てニーダーで所定の温度に混練するので、均一に混合し
たコンパウンドを得ることが出来、その後の発泡を均一
にすることが出来る。<Effect of the Invention> In the method of the present invention, first, a solid polyolefin-based resin, a foaming material, a crosslinking agent, a foaming aid, and the like are mixed and kneaded at a predetermined temperature by a kneader. A mixed compound can be obtained, and the subsequent foaming can be made uniform.
また、外周壁に多数のスチーム孔が設けられたスチー
ム加熱式成形金型内の中心部にスチームパイプを挿入し
ながらコンパウンド等を加熱加圧して発泡させるので、
金型自体の外周壁全体とその凹所の中心部とを同時に加
熱することが出来、内部迄が均一に発泡した独立気泡構
造を有する大径の円筒形発泡体を成形することが出来
る。In addition, since a compound etc. is heated and pressurized and foamed while inserting a steam pipe into the center of a steam heating type molding die provided with a large number of steam holes on the outer peripheral wall,
The entire outer peripheral wall of the mold itself and the center of the recess can be heated at the same time, and a large-diameter cylindrical foam having a closed-cell structure uniformly foamed up to the inside can be formed.
更に、本発明の方法を使用することによって、２〜20
倍に発泡させた独立気泡を持った架橋発泡体を自在に得
ることが出来、しかもその発泡シートの厚みも0.5〜10m
mに自在に変えて精度の良いものを安価に製造すること
が出来る等の特徴を有するものである。Further, by using the method of the present invention, 2-20
It is possible to freely obtain a cross-linked foam with double-celled closed cells, and the thickness of the foam sheet is 0.5 to 10 m
It is characterized by the fact that it is possible to manufacture a high-precision product at low cost by freely changing it to m.
第１図は発泡円筒体をピーリングして発泡シートを製造
する状態を示す斜視図、第２図（Ａ），（Ｂ），（Ｃ）
は配合材料を混練した後でシーティングする工程の説明
図、第３図（Ａ），（Ｂ）は成形金型の斜視説明図、第
４図（Ａ），（Ｂ）及び第５図（Ａ），（Ｂ），（Ｃ）
は夫々成形金型で発泡体を成形する工程を示す説明図で
ある。 １は原料、２はニーダー、３はコンパウンド、４はシー
ティングローラ、５は発泡用シート、6a,6bは金型、7a,
7bは凹所、８はスチーム孔、９はスチームパイプ、10
a、10bはプレス機、11は発泡円筒体、12は回転台、13は
切削刃、14は長尺発泡シートである。FIG. 1 is a perspective view showing a state in which a foamed sheet is manufactured by peeling a foamed cylindrical body, and FIGS. 2 (A), (B) and (C).
FIG. 3 (A) and (B) are perspective explanatory views of a molding die, and FIGS. 4 (A), (B) and FIG. 5 (A) ), (B), (C)
FIG. 3 is an explanatory view showing a step of forming a foam using a molding die. 1 is a raw material, 2 is a kneader, 3 is a compound, 4 is a sheeting roller, 5 is a foaming sheet, 6a and 6b are dies, 7a,
7b is a recess, 8 is a steam hole, 9 is a steam pipe, 10
Reference numerals a and 10b denote presses, 11 a foamed cylinder, 12 a turntable, 13 a cutting blade, and 14 a long foam sheet.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｂ２９Ｋ 105:24 (56)参考文献 特開 昭55−17510（ＪＰ，Ａ) 特開 昭56−89533（ＪＰ，Ａ) 特開 昭54−60365（ＪＰ，Ａ) 特開 昭63−22296（ＪＰ，Ａ) 特開 昭63−272496（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B29C 33/00 - 33/76 B29C 39/00 - 39/44 B29C 43/00 - 43/58 B29C 44/00 - 44/60 B29C 67/20 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI B29K 105: 24 (56) References JP-A-55-17510 (JP, A) JP-A-56-89533 (JP, A) JP-A-54-60365 (JP, A) JP-A-63-22296 (JP, A) JP-A-63-272496 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B29C 33 / 00-33/76 B29C 39/00-39/44 B29C 43/00-43/58 B29C 44/00-44/60 B29C 67/20
Claims (1)
多数のスチーム孔が夫々設けられかつその両端縁にスチ
ームパイプ挿入用くぼみが設けられた上下部金型を合わ
せることによって形成される円筒形凹所内に、ポリオレ
フィン系樹脂と熱分解発泡剤、架橋剤、発泡助剤等とを
混練した発泡性コンパウンド或いは該コンパウンドを加
熱されたシーティングロールで成形した発泡用シートを
充填し、かつ上下部金型によって形成される前記円筒形
凹所内の中心部にスチームパイプを挿通し、前記上下部
金型のスチーム孔と前記スチームパイプとにスチームを
供給して上下部金型を加熱加圧することによって独立気
泡構造を有する架橋発泡体を製造することを特徴とした
円筒形架橋発泡体の製造方法。1. An upper and lower mold having a semi-cylindrical recess therein, a plurality of steam holes formed in an outer peripheral wall, and steam pipe insertion recesses provided at both ends thereof. Filling the formed cylindrical recess with a foaming compound obtained by kneading a polyolefin-based resin and a pyrolytic foaming agent, a crosslinking agent, a foaming aid or the like, or a foaming sheet formed by heating the compound with a heated sheeting roll. A steam pipe is inserted into the center of the cylindrical recess formed by the upper and lower molds, and steam is supplied to the steam holes of the upper and lower molds and the steam pipe to heat the upper and lower molds. A method for producing a cylindrical crosslinked foam, comprising producing a crosslinked foam having a closed cell structure by applying pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018024A JP3056760B2 (en) | 1990-01-30 | 1990-01-30 | Method for producing cylindrical crosslinked foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018024A JP3056760B2 (en) | 1990-01-30 | 1990-01-30 | Method for producing cylindrical crosslinked foam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03222726A JPH03222726A (en) | 1991-10-01 |
| JP3056760B2 true JP3056760B2 (en) | 2000-06-26 |
Family
ID=11960101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2018024A Expired - Fee Related JP3056760B2 (en) | 1990-01-30 | 1990-01-30 | Method for producing cylindrical crosslinked foam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3056760B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19935336A1 (en) * | 1999-07-28 | 2001-02-01 | Basf Ag | Process for the production of foam sheets |
| JP4553120B2 (en) * | 2004-09-28 | 2010-09-29 | ブリヂストン化成品大阪株式会社 | Urethane chip sheet manufacturing method and urethane chip block |
| WO2012172790A1 (en) * | 2011-06-13 | 2012-12-20 | 日東電工株式会社 | Production method and production device for thermosetting resin porous sheet, thermosetting resin porous sheet and sheet roll |
-
1990
- 1990-01-30 JP JP2018024A patent/JP3056760B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03222726A (en) | 1991-10-01 |
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