JPS5987134A - Manufacture of flexible foamed styrene type resin molded item - Google Patents
Manufacture of flexible foamed styrene type resin molded itemInfo
- Publication number
- JPS5987134A JPS5987134A JP57198473A JP19847382A JPS5987134A JP S5987134 A JPS5987134 A JP S5987134A JP 57198473 A JP57198473 A JP 57198473A JP 19847382 A JP19847382 A JP 19847382A JP S5987134 A JPS5987134 A JP S5987134A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molded product
- molded
- type resin
- item
- 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
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
-
- 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
- B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
- B29C44/44—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form
- B29C44/445—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form in the form of expandable granules, particles or beads
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は柔軟性に富んだ発泡スチレン系樹脂成形品の製
造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a molded styrene resin product with high flexibility.
一般に発泡ポリスチレンは、＠量で断熱性等に優れるた
め、この特性を利用しているいろな方面に使用されてい
る。しかしながら曲げに対して割れ易く、クツシゴン材
、包装緩衝材、容器等で柔軟性をも要求されるものには
、その使用が制限されがちであった。そこでこの要望に
沿った柔軟性を付与させた発泡ポリスチレン材料が登場
した。In general, expanded polystyrene has excellent heat insulation properties and is used in a variety of applications that take advantage of this property. However, they tend to break easily when bent, and their use tends to be limited to materials that require flexibility, such as cushioning materials, packaging cushioning materials, and containers. Therefore, a foamed polystyrene material has been introduced that has been given flexibility to meet this demand.
そしてその製造方法としては、例えば特公昭４２−２６
９５０号公報に見られるように、発泡ポリスチレンシー
ト体に機械的圧縮力を加え、セル膜を破壊して柔軟性を
付与させるもの、特公昭４４−１１５４３号公報に見ら
れるように、発泡ポリスチレンシート体を密閉ハウジン
グ内に置き、超大気圧のもとの蒸気を供袷し、発泡ポリ
スチレンシート体中の残留膨張剤を活性化させ、さらに
膨張を引き起こし、超大気圧蒸気下の状態を開放するこ
とによって、さらに膨張を起こした空所を潰すことによ
って柔軟性を付移させるもの等があった。As for the manufacturing method, for example,
As seen in Japanese Patent Publication No. 950, a mechanical compressive force is applied to a foamed polystyrene sheet body to destroy the cell membrane and impart flexibility, and as seen in Japanese Patent Publication No. 11543/1983, a foamed polystyrene sheet By placing the body in a sealed housing and supplying steam under superatmospheric pressure, the residual expansion agent in the foamed polystyrene sheet body is activated, causing further expansion and releasing the state under superatmospheric steam. There were also those that added flexibility by crushing the voids that had caused the expansion.
そしてこれら先行技術には共通している点があった。す
なわち、ベース材としてすでに成形した発泡ポリスチレ
ン体を使用している点である。そしてこのような先行技
術における前工程としてのベース材の成形には、特に成
形用型を用いる型物発泡成形の場合には、まずスチレン
系樹脂の予備発泡粒子を成形用型内に充填し加熱成形し
て、その後冷却を行ってから脱型するという方法が従来
より取られていた。しかしながら、このような方法にお
いては、冷却工程があり、それゆえに成形用型も冷える
ため、次の加熱成形のために昇温すべき加熱蒸気等の熱
エネルギーを多く必要とするという欠点を有する。さら
に冷却時間も、発泡成形体自体が断熱性を有するため非
常に多く必要となり、成形工程中この冷却工程がネック
となっていた。These prior art technologies had something in common. That is, it uses an already molded polystyrene foam as the base material. In molding the base material as a pre-process in such prior art, especially in the case of foam molding using a mold, first, pre-expanded particles of styrene resin are filled into the mold and heated. Conventionally, the method used was to mold, then cool, and then remove from the mold. However, in such a method, there is a cooling step, and therefore the mold is also cooled, so there is a drawback that a large amount of thermal energy such as heating steam to be heated for the next hot molding is required. Furthermore, since the foamed molded product itself has heat insulating properties, a very long cooling time is required, and this cooling step has been a bottleneck during the molding process.
本発明は上述のような点を鑑みなされたものであって、
その目的とするところは、柔軟性を有する発２（シスチ
レン系樹脂成形品を製造するに当って、主として使用エ
ネルギーを大Ｉ＋］に削減しイ４すると共に成形サイク
ルを早められる製造方法を提供することにある。The present invention has been made in view of the above points, and includes:
The purpose is to provide a manufacturing method that can reduce the amount of energy used (mainly in producing cystyrene resin molded products by a large I+) with flexibility, and speed up the molding cycle. There is a particular thing.
かかる本発明の要旨は、成形用型内にスチレン系樹脂の
予備発泡粒子を充填し加熱成形した後、すみやかに紋型
より成形体を取り出して、該成形体の有する残存発泡力
によってさらに膨張せしめ、次いで該成形体を該成形体
の軟化点以下の雰囲気下に存在させて収縮を生ぜしめ次
いで再膨張せしめることを特徴とする柔軟性を有する発
泡スチレン系樹脂成形品の製造方法にある。The gist of the present invention is to fill a mold with pre-expanded particles of styrene resin and heat-form the particles, then immediately take out the molded object from the mold and further expand it using the residual foaming power of the molded object. , there is provided a method for producing a flexible styrene resin molded article, characterized in that the molded article is then placed in an atmosphere below the softening point of the molded article to cause contraction and then re-expansion.
以下に本発明の詳細な説明する。The present invention will be explained in detail below.
本発明に使用するスチレン系樹脂の予備発泡粒子として
は、この種の発泡成形において一般に使用されるもので
よく、例をあげればベース樹脂としてのスチレン、メチ
ルスチレン、クロ［ｊスチレン等のスチレン系樹脂とプ
ロパン、ブタン、ペンタン、ヘキサン等の脂肪族炭化水
素やメチレンクロライド、ジクロロフルオロメタン、ジ
クロロジフルオロメタン等のハロゲン化炭化水素、ある
いは石油エーテル等の易揮発性白質等の発泡剤とからな
る粒子が１吏用でき、必観に応じ造核剤、難燃剤、帯市
防止剤等を加えてもよい。The pre-expanded particles of the styrenic resin used in the present invention may be those commonly used in this type of foam molding. Particles made of resin and a blowing agent such as aliphatic hydrocarbons such as propane, butane, pentane, hexane, halogenated hydrocarbons such as methylene chloride, dichlorofluoromethane, dichlorodifluoromethane, or easily volatile white matter such as petroleum ether. A nucleating agent, a flame retardant, an anti-oxidizing agent, etc. may be added as required.
まずこのようなスチレン系樹脂の予備発泡粒子を金型等
の成形用型内に充填する。次いで型内に加熱蒸気等を供
給して、予備発泡粒子を発泡、相互融着させ成形する。First, such pre-expanded particles of styrene resin are filled into a mold such as a metal mold. Next, heated steam or the like is supplied into the mold to foam and fuse the pre-expanded particles to each other and form the mold.
その後、すみやかに（成形体が残存発泡力を有している
うちに）型より成形体を取シ出す。使用する金型等の成
形用型は、成形体をすみやかに取り出す際に成形体が部
分的に変形したりしないようにする構造の成形用型であ
ることが好１しく、例えば第１図に示すような対角線方
向に分離する２分割型（１）や第２図に示すような成形
体各面から外側へ離れるように分離する割型（２）等が
あげられる。ついで取υ出した成形体をその発泡成形体
中に存する残存発泡力によって体積比で普通１−３〜ｇ
Ｑ倍程度まで膨張せしめる。Thereafter, the molded product is promptly removed from the mold (while the molded product still has residual foaming power). It is preferable that the mold such as a metal mold to be used has a structure that prevents the molded product from being partially deformed when the molded product is taken out promptly. For example, as shown in FIG. Examples include a two-part mold (1) that separates the molded product diagonally as shown, and a split mold (2) that separates the molded product outwardly from each side as shown in FIG. Then, the molded product taken out is usually 1-3 to 1 g in volume ratio depending on the residual foaming power present in the foamed molded product.
Expand it to about Q times.
なおこの残存発泡力は、成形体内部の発泡剤および加熱
蒸気残圧によシ発生するものと考えられる。It is believed that this residual foaming force is generated by the foaming agent and the residual pressure of heated steam inside the molded article.
膨張した成形体は、はぼ脱型時の成形体形状すなわち型
のキャビティ形状と相似形となる。The expanded molded body has a shape similar to the shape of the molded body at the time of demolding, that is, the shape of the cavity of the mold.
この膨張に際しては、常温、常圧丁に放置しておいても
よいし、強制的に加温をしたり、減圧手段を施こして膨
張状態をコントロールしてもよい。During this expansion, it may be left at room temperature and pressure, or the state of expansion may be controlled by forcibly heating or using a pressure reducing means.
またスチレン系樹脂の予備発泡粒子の段階で予備発泡粒
子の熟成時間を短かく取ったり、長く取ったシしてコン
トロールしてもよい。特に膨張に際して減圧手段を施こ
した場合には、成形体（特に厚味が１１００Ｗ程度以上
の成形体）内部の加熱蒸気の凝縮水の蒸発が促進される
ため、含水率の低い成形体が得られる利点を有する。ま
たこの蒸発による気化熱を、成形体の内部にまで及んで
成形体よシ奪うだめ、断熱効果の高い発泡成形体の内部
冷却に極めて有効であり、さらに成形体の全域に渡って
ほぼ同様の膨張が起こり易く、三次元方向へのほぼ均等
な膨張を可能ならしめるという利点を有する。Further, the aging time of the pre-expanded particles may be shortened or increased at the stage of pre-expanded particles of the styrene resin to control the aging time. In particular, if a depressurizing means is applied during expansion, the evaporation of the condensed water of the heated steam inside the molded product (particularly a molded product with a thickness of about 1100 W or more) is promoted, resulting in a molded product with a low moisture content. It has the advantage of being In addition, the heat of vaporization caused by evaporation reaches the inside of the molded body and is taken away from the molded body, so it is extremely effective for cooling the inside of a foam molded body with a high heat insulation effect. It has the advantage of being easy to expand and allowing almost uniform expansion in three dimensions.
次にこの成形体を該成形体の軟化点以下、好ましくは常
温での雰囲気下に存在させて収縮を生ぜしめ、次いで再
膨張せしめる。この収縮並びに再膨張を生ぜしめるには
、常温でノチ圧下に放１−シておくことで充分であるが
、加圧中段や減圧手段を施こしてもよい。Next, this molded body is caused to shrink by being placed in an atmosphere below its softening point, preferably at room temperature, and then expanded again. In order to cause this contraction and re-expansion, it is sufficient to leave the material under pressure at room temperature, but it is also possible to apply intermediate pressure or decompression means.
このように成形体の軟化点以下の雰囲気下に、膨張した
成形体を存在させることによって、膨張した成形体のセ
ル内にある高温膨張ガスが成形体の外部の奔囲気と平衡
となろうとする結果、負の力が成形体に動き、鉾通成形
用型のキャビティー容積の０．９〜（１５倍程度まで収
縮が生じる。By allowing the expanded molded body to exist in an atmosphere below the softening point of the molded body, the high-temperature expanding gas within the cells of the expanded molded body attempts to come into equilibrium with the ambient air outside the molded body. As a result, a negative force is applied to the molded body, causing contraction to approximately 0.9 to 15 times the cavity volume of the mold for hokotsu molding.
次いで成形体のセル内のガスと成形体の外部の雰囲気と
がほぼ平衡状態となると、成形体の収縮に伴なって、応
力の蓄積されたセル膜が今度は伸長しようとして成形体
は体積比で普通Ｌｌ−２，０倍程度まで青膨張をする。Next, when the gas inside the cells of the molded body and the atmosphere outside the molded body reach a nearly equilibrium state, as the molded body contracts, the cell membranes with accumulated stress try to expand, causing the volume ratio of the molded body to decrease. Normally, the blue color is expanded to about Ll-2.0 times.
この再膨張後の成形体は甑めて柔軟性に富んでおシ、適
宜形状に切り出すなり、打ぢ抜く等して実用に供せられ
る。またこのような加工をせずに、そのまま使用するよ
うな成形品であっても、成形諸条件をコントロールする
ことによって脱型時の形状とほぼ同寸法形状のものとす
ることが可能であるため、適用できる。After this re-expansion, the molded product is cooled and becomes highly flexible, and can be put into practical use by being cut into an appropriate shape or punched out. Furthermore, even if a molded product is to be used as is without such processing, by controlling the molding conditions it is possible to make it into a shape with almost the same dimensions as when demolded. , applicable.
さらにこの再膨張した成形品にプレス機、ロール等によ
る外部押圧力を作用させ柔軟度を増加させてもよい。こ
の外部押圧力を作用させるに当っては、弱い押圧力を数
回繰υ返して作用させてもよいし、一度に強い押圧力を
作用させてもよい。なお、この再膨張後に施こす外部抑
圧手段は柔軟１生の面からは特に成形品の密度が高いも
のにおいて有効である。このようにして得られた発泡ス
テレ／系樹脂成形品は、これを構成するセル膜に、司当
なシワが発生しており、このシワ状セル膜がいわば伸び
きっていないまだ縮みきっていないバネ的な役割を果す
結果、成形品が柔軟性に富むものと考えられる。Furthermore, the degree of flexibility may be increased by applying an external pressing force using a press, rolls, etc. to the re-expanded molded product. When applying this external pressing force, a weak pressing force may be applied repeatedly several times, or a strong pressing force may be applied all at once. Note that the external suppression means applied after this re-expansion is effective from the viewpoint of flexibility, especially when the density of the molded product is high. The foamed stereo/resin molded product obtained in this way has wrinkles in the cell membrane that constitutes it, and the wrinkled cell membrane has not fully expanded or shrunk yet. It is thought that as a result of playing a spring-like role, the molded product is highly flexible.
本発明は、成形用型内にスチレン系崩脂の予備発泡粒子
を充填し加熱成形した後、すみやかに紋型よυ成形体を
取シ出してしまうので、従来ネックとなっていた型内で
の水冷等の冷却工程を全く必要としない。従ってすぐに
次の成形のための予備発泡粒子を充填できるため、著し
く成形サイクルを早めることができる。又加熱成形のだ
めの加熱蒸気等の熱エネルギーも、次の成形の際に水冷
等の冷却によって型が冷えていないので極めてわずかで
済む利点を有する。In the present invention, after the pre-expanded particles of styrene-based fat are filled into the mold and heated and molded, the molded body can be immediately removed from the mold, which has been a problem in the past. No cooling process such as water cooling is required. Therefore, since pre-expanded particles for the next molding can be filled immediately, the molding cycle can be significantly accelerated. Further, the thermal energy of the heated steam in the hot molding reservoir has the advantage of being extremely small because the mold is not cooled by water cooling or the like during the next molding.
本発明は、柔軟化の段階においても、加熱成形後すみや
かに型よシ取り出しだ残存発泡力を有するいわば半成形
体をベース利としているため、従来のように改めて、さ
らに膨張させるべく必要十分な高圧、加熱蒸気等を供給
する必要がない。Even in the softening stage, the present invention uses a so-called semi-molded product as a base that has residual foaming power that can be removed from the mold immediately after hot molding. There is no need to supply high pressure, heated steam, etc.
又膨張後の成形体を軟化点以下の雰囲気下に存在させる
ことによって収縮次いで再膨張せしめるので、従来のよ
つなセル膜破壊のだめに要ｌ−る強大な圧縮力を必要と
せす、本発明において成形体を再膨張せしめた麦、外部
押圧力を作用させるＳ合であっても、その外部押圧力作
用前にすでに成形体は収縮、再膨張しておシ柔軟雇がア
ップしているためずつと少ない外部押圧力で済むもので
ある。Furthermore, since the expanded molded product is allowed to shrink and then re-expand by being placed in an atmosphere below its softening point, the present invention requires a huge compressive force that is required to destroy the conventional cell membrane. Even in the case where the molded body is re-expanded, even if an external pressing force is applied, the molded body has already contracted and re-expanded before the external pressing force is applied, increasing the flexibility. This means that only a small amount of external pressing force is required.
実施例１
発泡剤としてペンタンを用いた発泡性ポリスチレンビー
ズを２段発泡させ、がさ密度１２．５Ｋｇ／ｍ’に達し
てから１時間放置させて得た予備発泡粒子を：３００
ｍｍ Ｘ ３００鴫Ｘ５Ｑ門の内容積の金型に充填し金
型を予熱し常法により蒸気圧０．７ Ｋｇ ／ ｃｎｌ
の加熱蒸気で２０秒間の加熱を行った。加熱成形された
成形体を従来のような水冷却を施こさずに直ちに金型よ
り取り出した。この成形体はすぐに膨張を開始し最大１
彫張時約６ Ｋｇ ／ ？の′１Ｍ度となυ、次いで収
縮が生じ１０分後には約２０ Ｋｙ ／ ｎ／の密度に
まで縮んだ。さらに放置して４８時間後には約１３Ｋｇ
／靜の密度にまで復元した。この成形体はほぼ金型内容
積の形状と同じとなり、非常にすぐれた柔軟性を有して
いた。Example 1 Pre-expanded particles were obtained by foaming expandable polystyrene beads in two stages using pentane as a foaming agent and leaving them for 1 hour after reaching a bulk density of 12.5 Kg/m'.
Fill a mold with an internal volume of mm
Heating was performed for 20 seconds using heated steam. The hot-molded molded body was immediately taken out of the mold without water cooling as in the conventional method. This molded body immediately begins to expand and reaches a maximum of 1
Approximately 6 kg / ? Then, contraction occurred and after 10 minutes, it had shrunk to a density of about 20 Ky/n/. Approximately 13 kg after 48 hours of leaving it
/ Restored to the density of silence. This molded article had a shape almost identical to the internal volume of the mold, and had excellent flexibility.
実施例２
実施１３’ｊｌ ｌで用いたと同じ発泡性ポリスチレン
ビーズを３段発泡させ、かさ密度ＢＫｔｙ／ｍ’に４Ｌ
、てから４時間放置させて得た予備発泡粒子を実施例１
で用いたと同じ金型に充填し、実癩回］と同じ条件で加
熱成形して水冷却を施こさずに直ちに金型より成形体を
取り出した。この成形体はすぐに膨張を開始し最大膨張
特約′７縁／ツ２／の密度となり、次いで収縮が生じ５
分後には約１６に９／ｒｒｌの密度にまで縮んだ。さら
に放置して４８時１川後には約８縁／−にまで復元した
。この成形体はほぼ金型内容積の形状と同じとなり、非
常にすぐれた柔軟性を有していた。Example 2 The same expandable polystyrene beads used in Example 13'jl were expanded in three stages, and the bulk density BKty/m' was 4L.
Example 1
The molded product was filled into the same mold as used in [2], heated and molded under the same conditions as in [Real Leprosy], and the molded product was immediately taken out from the mold without water cooling. This molded product immediately begins to expand and reaches a density of the maximum expansion clause '7/2/, and then shrinks.
After minutes, it had shrunk to a density of about 16/rrl. After further neglect, it was restored to about 8 edges/- after 48 hours. This molded article had a shape almost identical to the internal volume of the mold, and had excellent flexibility.
第１図及び第２図は本発明において使用する成形用型の
例を示す説明図である。
１・・・・２分割型 ２・・・・別型特許出願人
アキレス法式会社（１，；：’ ）、、・１ゝ
、″FIGS. 1 and 2 are explanatory diagrams showing examples of molds used in the present invention. 1...2-split type 2...Different type Patent applicant Achilles Law Company (1,;:'),,・1ゝ
,″
Claims (1)
し加熱成形した後、すみやかに該型よシ成形体を取シ出
して、該成形体の有する残存発泡力によってさらに膨張
せしめ、次いで該成形体を該成形体の軟化点以下の雰囲
気下に存在させて収縮を生ぜしめ次いで再膨張せしめる
ことを特徴とする柔軟性を有する発泡スチレン系樹脂成
形品の製造方法。 ２、成形用型よシ成形体を取り出して、該成形体の有す
る残存発泡力によってさらに膨張せしめるにあたシ、成
形体を減圧下において膨張せしめることを特徴とする特
許請求の範囲第１項記載の柔軟性を有する発泡スチレン
系樹脂成形品の製造方法。[Claims] 1. After filling a mold with pre-expanded particles of styrene resin and heating and molding, the molded product is immediately removed from the mold and the remaining foaming power of the molded product is evaluated. A method for producing a flexible styrene foam resin molded product, which comprises further expanding the molded product by expanding the molded product, and then placing the molded product in an atmosphere below the softening point of the molded product to cause contraction and then re-expanding the molded product. . 2. The molded article is taken out from the mold for further expansion by the residual foaming power of the molded article, and the molded article is expanded under reduced pressure in claim 1. A method for manufacturing a foamed styrene resin molded product having the flexibility described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57198473A JPS5987134A (en) | 1982-11-12 | 1982-11-12 | Manufacture of flexible foamed styrene type resin molded item |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57198473A JPS5987134A (en) | 1982-11-12 | 1982-11-12 | Manufacture of flexible foamed styrene type resin molded item |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5987134A true JPS5987134A (en) | 1984-05-19 |
| JPS6252703B2 JPS6252703B2 (en) | 1987-11-06 |
Family
ID=16391687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57198473A Granted JPS5987134A (en) | 1982-11-12 | 1982-11-12 | Manufacture of flexible foamed styrene type resin molded item |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5987134A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011020405A (en) * | 2009-07-17 | 2011-02-03 | Sekisui Plastics Co Ltd | Process for manufacturing expanded molding, expanded molding, and luggage box for vehicle composed of the expanded molding |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5651337A (en) * | 1979-10-02 | 1981-05-08 | Achilles Corp | Manufacture of highly elastic foamed styrene resin molding |
-
1982
- 1982-11-12 JP JP57198473A patent/JPS5987134A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5651337A (en) * | 1979-10-02 | 1981-05-08 | Achilles Corp | Manufacture of highly elastic foamed styrene resin molding |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011020405A (en) * | 2009-07-17 | 2011-02-03 | Sekisui Plastics Co Ltd | Process for manufacturing expanded molding, expanded molding, and luggage box for vehicle composed of the expanded molding |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6252703B2 (en) | 1987-11-06 |
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