JPH06172579A - Production of polyolefin resin foam - Google Patents
Production of polyolefin resin foamInfo
- Publication number
- JPH06172579A JPH06172579A JP4326531A JP32653192A JPH06172579A JP H06172579 A JPH06172579 A JP H06172579A JP 4326531 A JP4326531 A JP 4326531A JP 32653192 A JP32653192 A JP 32653192A JP H06172579 A JPH06172579 A JP H06172579A
- Authority
- JP
- Japan
- Prior art keywords
- foam
- resin
- polyolefin resin
- shrinkage
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ポリオレフィン系樹脂
発泡体の製造方法に関する。より詳しくは、ポリオレフ
ィン系樹脂の押出発泡方法の改善に関する。FIELD OF THE INVENTION The present invention relates to a method for producing a polyolefin resin foam. More specifically, it relates to an improvement in the extrusion foaming method of polyolefin resin.
【０００２】[0002]
【従来の技術】押出発泡により発泡体（フォーム）を製
造する場合には、主原材料となる樹脂にフロン等の揮発
性の発泡剤を添加し、その他気泡核剤等を加えた組成物
を押出機に供給して吐出口から吐出させ、その際に発泡
剤が揮発して組成物が発泡し、発泡体が得られる。2. Description of the Related Art When a foam is produced by extrusion foaming, a composition in which a volatile foaming agent such as CFC is added to a resin which is a main raw material and a foam nucleating agent is added is extruded. It is supplied to the machine and discharged from the discharge port, at which time the foaming agent volatilizes and the composition foams to obtain a foam.
【０００３】一般にポリオレフィン系樹脂の押出発泡に
使用される揮発性の発泡剤は、大別すると炭化水素類と
ハロゲン化炭化水素類に分けられる。そのいずれも発泡
剤としての効果は非常に優れており、各種発泡に使用さ
れていることは公知の事実である。特にフロン系ハロゲ
ン化炭化水素は一般によく使用されている。Generally, volatile foaming agents used for extrusion foaming of polyolefin resins are roughly classified into hydrocarbons and halogenated hydrocarbons. It is a known fact that all of them are very effective as a foaming agent and are used for various foaming. In particular, CFC-based halogenated hydrocarbons are commonly used.
【０００４】しかし、上記発泡剤は優れた発泡性を有す
る長所がある一方で、これらの発泡剤を用いて押出発泡
を行うと、押出発泡直後から発泡体が経時的に収縮する
という問題が生じていた。これは、上記のような発泡剤
は発泡体中での透過速度（ガス逃散速度）が空気に比べ
て極めて大きいことによる。However, while the above foaming agents have the advantage of having excellent foamability, when extrusion foaming is carried out using these foaming agents, there arises a problem that the foam shrinks with time immediately after extrusion foaming. Was there. This is because the foaming agent as described above has a much higher permeation rate (gas escape rate) in the foam than air.
【０００５】すなわち、押出発泡直後から発泡体内部の
発泡剤と外部の空気との置換が行われるが、発泡剤は速
やかに発泡体セル内から外界へと透過してしまうのに対
し、空気は緩やかに発泡体セル内へ侵入する。このた
め、上記発泡剤を用いて押出発泡を行うと、発泡体は経
時的に収縮してゆくので、得られた発泡体の寸法安定性
に欠けるばかりでなく、長い熟成期間を必要とするとい
う欠点があった。That is, immediately after extrusion foaming, the foaming agent inside the foam is replaced with the outside air, but the foaming agent quickly permeates from the inside of the foam cell to the outside, whereas the air does not. Gently penetrates into the foam cells. Therefore, when extrusion foaming is performed using the foaming agent, the foam shrinks over time, so that not only the dimensional stability of the resulting foam is lacking, but also a long aging period is required. There was a flaw.
【０００６】そこで、上記のような発泡体の気泡収縮を
抑制するため、脂肪族エステル、脂肪族アミド又はアミ
ン、その他脂肪酸等の脂肪族化合物からなる界面活性剤
として働く特殊な収縮防止剤を用いて押出し発泡を行う
ことによって発泡体の収縮を防止している。Therefore, in order to suppress the cell shrinkage of the foam as described above, a special shrinkage inhibitor which acts as a surfactant composed of an aliphatic ester, an aliphatic amide or an amine, and other aliphatic compounds such as fatty acids is used. By extruding and foaming, the shrinkage of the foam is prevented.
【０００７】上記のような脂肪族化合物が収縮防止剤と
して働くメカニズムは、脂肪族化合物内に配列されてい
る水酸基やアミノ基等がフロンガス等の発泡剤の透過を
妨げることやポリオレフィン樹脂に対する溶解性が悪い
ことを利用したものであり、発泡体セル表面にブリード
アウトさせることによってガス透過抑制を行うものであ
る（特公昭４６−４３９９７号公報、特公昭６１−１４
６３号公報、特公昭６２−４５２５４号公報、特公昭６
２−４５２５７号公報、特公平２ー４８０２３号公報参
照）。The mechanism by which the above-mentioned aliphatic compound acts as an anti-shrinking agent is that the hydroxyl groups and amino groups arranged in the aliphatic compound prevent permeation of the blowing agent such as CFC gas and the solubility in the polyolefin resin. Is used to suppress gas permeation by bleeding out on the surface of the foam cell (Japanese Patent Publication No. 46-43997 and Japanese Patent Publication No. 61-14).
63, Japanese Patent Publication 62-45254, Japanese Patent Publication 6
2-45257, Japanese Patent Publication No. 2-48023).
【０００８】[0008]
【発明が解決しようとする課題】発泡剤の樹脂中からの
ガス逃散速度は、発泡剤の種類によって大小さまざまで
あり、発泡剤によっては収縮防止剤を大量に使用しなけ
れば気泡収縮を防止することができない場合がある。し
かし、上記のような気泡収縮を抑制するために使用され
る収縮防止剤は、滑剤としても働くという特性から添加
可能な部数範囲は非常に狭く、大量に添加することがで
きない。The gas escape rate of the foaming agent from the resin varies depending on the type of the foaming agent. Depending on the foaming agent, bubble shrinkage can be prevented unless a large amount of shrinkage inhibitor is used. It may not be possible. However, the shrinkage-preventing agent used for suppressing the above-described bubble shrinkage has a very narrow range of number of parts that can be added due to the property that it also functions as a lubricant, and cannot be added in a large amount.
【０００９】つまり、滑剤として働く収縮防止剤は、多
く添加すればするほど収縮防止という点ではより大きな
効果が得られるものの、大量に添加すると吐出・発泡変
動を招き、押出吐出安定性が大きく低下して成形が困難
になるという問題を生じる。また、得られた発泡体の接
着性も低下し、印刷性等も悪くなる。That is, the more the shrinkage-preventing agent acting as a lubricant, the greater the effect in terms of preventing shrinkage as it is added, but when added in a large amount, discharge / foaming fluctuations are caused, and extrusion discharge stability is greatly reduced. Then, there arises a problem that molding becomes difficult. In addition, the obtained foam has poor adhesiveness and poor printability.
【００１０】また近年、フロンによる環境問題が注目を
集めていることからオゾン層を破壊しないフロンの開発
が進められており、例えばＨＣＦＣ及びＨＦＣ型フロン
等が開発されている。しかし、これらの新たに開発され
たフロンの大部分はガス透散速度が大きいので、これら
のフロンを発泡剤として使用する場合は気泡収縮を防止
するために使用すべき収縮防止剤の量も多くなる。その
結果、前述したように押出吐出安定性は低下し、安定成
形が困難となる。Further, in recent years, since environmental problems due to CFCs have been attracting attention, CFCs that do not destroy the ozone layer have been developed, and for example HCFC and HFC type CFCs have been developed. However, since most of these newly developed freons have a high gas permeation rate, when these freons are used as a foaming agent, a large amount of shrinkage inhibitor should be used to prevent bubble shrinkage. Become. As a result, the extrusion discharge stability is lowered as described above, and stable molding becomes difficult.
【００１１】そこで本発明は、上記のような問題を解決
するためになされたもので、ガス逃散速度の大きい発泡
剤を使用する場合でも、気泡収縮を防止し、押出し安定
性が高く、接着性の良好な発泡体を得ることができるポ
リオレフィン系樹脂発泡体の製造方法を提供することを
目的とする。Therefore, the present invention has been made in order to solve the above-mentioned problems. Even when a foaming agent having a high gas escape rate is used, bubble shrinkage is prevented, extrusion stability is high, and adhesiveness is high. It is an object of the present invention to provide a method for producing a polyolefin resin foam capable of obtaining a good foam.
【００１２】[0012]
【課題を解決するための手段】本発明は、特許請求の範
囲の請求項１に記載したように、ポリオレフィン系樹脂
１００重量部に脂肪族化合物からなる収縮防止剤と３〜
３０重量部の水酸基含有樹脂を混合し、この混合物にさ
らに適量の発泡剤を添加した組成物を所定形状に押出し
発泡させることを特徴とするポリオレフィン系樹脂発泡
体の製造方法を提供する。According to the present invention, 100 parts by weight of a polyolefin-based resin and an anti-shrinking agent comprising an aliphatic compound are contained in 3 parts by weight of a polyolefin resin.
Provided is a method for producing a polyolefin-based resin foam, which comprises mixing 30 parts by weight of a hydroxyl group-containing resin, and extruding a composition obtained by adding an appropriate amount of a foaming agent to the mixture to form a foam.
【００１３】収縮防止剤として使用する脂肪族化合物
は、好ましくは脂肪酸と多価アルコールのモノエステル
又はジエステル若しくはこれらの混合物、あるいは脂肪
族アミン又はアミド化合物のいずれかである。The aliphatic compounds used as shrinkage inhibitors are preferably either monoesters or diesters of fatty acids and polyhydric alcohols or mixtures thereof, or aliphatic amine or amide compounds.
【００１４】また、前記水酸基含有樹脂は、好ましくは
融点が１００℃以上であり、且つ前記ポリオレフィン系
樹脂の融点の±１０℃の範囲内である。このような水酸
基含有樹脂としては、例えばエチレン酢酸ビニル共重合
体ケン化物が挙げられる。The hydroxyl group-containing resin preferably has a melting point of 100 ° C. or higher, and is within ± 10 ° C. of the melting point of the polyolefin resin. Examples of such a hydroxyl group-containing resin include saponified ethylene vinyl acetate copolymer.
【００１５】以下、本発明をさらに詳細に説明する。本
発明における最も重要な要素は、収縮防止剤に水酸基を
含有する樹脂を配合する点にある。収縮防止剤として広
く知られているものは、前述したように例えば脂肪族エ
ステル、脂肪族アミド又はアミン、その他脂肪酸等の脂
肪族化合物が一般的である。The present invention will be described in more detail below. The most important element in the present invention is to add a resin containing a hydroxyl group to the shrinkage inhibitor. As widely known as anti-shrink agents, as described above, for example, aliphatic esters, aliphatic amides or amines, and other aliphatic compounds such as fatty acids are generally used.
【００１６】しかし、これらの物質は、多量に入れると
吐出及び発泡変動を招くため、成形が困難であるばかり
か接着性も低下することも前述した通りである。そこで
本発明では、上記脂肪族化合物と３〜３０重量部の水酸
基含有樹脂をオレフィン系樹脂に混合し、この混合物か
らなる組成物を押出と同時に発泡させるようにしたもの
である。However, as described above, when a large amount of these substances is introduced, the discharge and foaming fluctuations are caused, so that not only molding is difficult but also the adhesiveness is deteriorated. Therefore, in the present invention, the aliphatic compound and 3 to 30 parts by weight of a hydroxyl group-containing resin are mixed with an olefin resin, and a composition comprising this mixture is foamed at the same time as extrusion.
【００１７】この水酸基含有樹脂にはガスバリアー効果
があり、ガス透過抑制及び吐出変動を防止する上でも効
果がある。従って、これら水酸基含有樹脂と通常収縮防
止剤とを併用することで、通常滑剤としての特性も有す
る収縮防止剤の添加量を少なくすることが可能となり、
気泡収縮のないオレフィン系発泡体を吐出変化もなく安
定的に成形することができる。そして、滑剤としての特
性も有する収縮防止剤の添加量が少ないことから、得ら
れた発泡体のアクリル系粘着剤による接着が阻害され
ず、発泡体の印刷性等も損ねることが少ない。また、水
酸基含有樹脂を併用することにより、滑剤としての特性
も有する収縮防止剤との各種組合せが可能となり、例え
ばブタン、ペンタン、ＣＯ2等のガス透過度の大きなガ
スの無収縮発泡法への展開も見込める。This hydroxyl group-containing resin has a gas barrier effect, and is also effective in suppressing gas permeation and preventing discharge fluctuation. Therefore, by using these hydroxyl group-containing resins in combination with a normal shrinkage inhibitor, it becomes possible to reduce the addition amount of the shrinkage inhibitor which also has properties as a normal lubricant,
It is possible to stably form an olefin-based foam without cell shrinkage without change in discharge. Further, since the addition amount of the shrinkage-preventing agent also having a property as a lubricant is small, the adhesion of the obtained foam by the acrylic pressure-sensitive adhesive is not hindered, and the printability of the foam is not impaired. Further, by using the hydroxyl group-containing resin in combination, various combinations with a shrinkage-preventing agent that also has a property as a lubricant are possible. For example, a non-shrinkage foaming method for a gas having a large gas permeability such as butane, pentane, and CO 2 Expected to develop.
【００１８】水酸基含有樹脂は、融点が１００℃以上の
ものが好ましい。また、主材料であるポリオレフィン系
樹脂の融点に近いほど好ましい。具体的には、融点が主
材料融点の±１０℃の範囲内であるのが好ましく、さら
に好ましくは±５℃の範囲内である。このような水酸基
含有樹脂としては、例えばエチレン酢酸ビニル共重合体
ケン化物が挙げられる。The hydroxyl group-containing resin preferably has a melting point of 100 ° C. or higher. In addition, it is preferable that the melting point be close to the melting point of the polyolefin-based resin that is the main material. Specifically, the melting point is preferably within ± 10 ° C. of the melting point of the main material, and more preferably within ± 5 ° C. Examples of such a hydroxyl group-containing resin include saponified ethylene vinyl acetate copolymer.
【００１９】また、水酸基含有樹脂はガス透過を抑制し
たり吐出変動を防止するばかりでなく、樹脂そのものと
してポリオレフィン系樹脂とブレンドされた樹脂を形成
するので、得られた発泡体に新たな特徴を付加し得るこ
ととなる。例えば、水酸基含有樹脂としてエチレン酢酸
ビニル共重合体を配合した場合は、得られた発泡体に適
度なダンカ性能の向上が期待できる。Further, the hydroxyl group-containing resin not only suppresses gas permeation and prevents discharge fluctuation, but also forms a resin blended with a polyolefin resin as the resin itself, so that the obtained foam has a new characteristic. It can be added. For example, when an ethylene-vinyl acetate copolymer is blended as the hydroxyl group-containing resin, the obtained foam can be expected to have an appropriate improvement in the damper performance.
【００２０】本発明にいうポリオレフィン系樹脂として
は、例えばポリエチレン、架橋性ポリエチレン共重合
体、ポリプロプレン、エチレン−ピロピレン共重合体、
エチレン又はプロピレンのα−オレフィン共重合体、エ
チレン酢酸ビニル共重合体等が挙げられる。これらをそ
れぞれ単独で使用してもよいし、２種以上を混合して使
用してもよい。なお、水架橋性ポリオレフィン樹脂を主
材料として用い、これに水酸基含有樹脂を配合する場合
には、水酸基含有樹脂が親水性樹脂であることから、架
橋触媒の使用を省略することも期待できる。The polyolefin resin referred to in the present invention includes, for example, polyethylene, crosslinkable polyethylene copolymer, polypropylene, ethylene-pyropyrene copolymer,
Examples include α-olefin copolymers of ethylene or propylene, ethylene-vinyl acetate copolymers, and the like. These may be used alone or in combination of two or more. When a water-crosslinkable polyolefin resin is used as a main material and a hydroxyl group-containing resin is mixed therein, it is expected that the use of a crosslinking catalyst can be omitted because the hydroxyl group-containing resin is a hydrophilic resin.
【００２１】さらに、気泡核剤、架橋触媒、酸化防止
剤、滑剤、静防剤、顔料等を適宣必要に応じて添加する
こともできる。Further, a bubble nucleating agent, a crosslinking catalyst, an antioxidant, a lubricant, an antistatic agent, a pigment and the like can be added as appropriate.
【００２２】[0022]
【実施例】以下、本発明の実施例について説明する。メ
ルトインデックス（１９０℃ ＭＩ）が２．０で密度が
０．９２の低密度ポリエチレン樹脂に、収縮防止剤とし
ての脂肪族エステル、水酸基含有樹脂及び気泡核剤とし
てのタルクを、実施例１〜６及び比較例１〜５としてそ
れぞれ表１及び表２に示すような種々の割合で混合し
た。EXAMPLES Examples of the present invention will be described below. A low-density polyethylene resin having a melt index (190 ° C. MI) of 2.0 and a density of 0.92, an aliphatic ester as a shrinkage-preventing agent, a hydroxyl group-containing resin, and talc as a bubble nucleating agent were used in Examples 1 to 6. And Comparative Examples 1 to 5 were mixed at various ratios as shown in Table 1 and Table 2, respectively.
【００２３】これらの混合物を４０ｍ／ｍ口径の単軸押
出機（Ｌ／Ｄ：２８）に供給し、溶融混練した後、押出
機中央に設けられた発泡剤注入口から発泡剤を注入し、
発泡倍率が３５倍程度になるように設定した。次いで再
度混練冷却した後、押出機先端に装着された口金（口径
４φ）から大気中に押出し、吐出と同時に発泡させた。These mixtures were supplied to a single-screw extruder (L / D: 28) having a diameter of 40 m / m, melt-kneaded, and then a foaming agent was injected from a foaming agent injection port provided in the center of the extruder,
The expansion ratio was set to about 35 times. Then, after kneading and cooling again, the mixture was extruded into the atmosphere from a die (caliber 4φ) attached to the tip of the extruder, and foamed simultaneously with discharge.
【００２４】これらの各実施例及び比較例の押出し特性
及び得られた発泡体の特性を表１及び表２に示した。な
お、各表において発泡体の特性評価の結果は以下のよう
に表示した。 吐出変動（押出安定性）：◎吐出変動なし、○吐出変動
が安定領域内、△吐出変動少し多い、×吐出変動大 発泡成形性・外観：◎最良、○良好な領域内、△時々不
足有り、×不足 収縮：◎収縮なし、○１日以内に収縮が回復、△３〜５
日収縮が残存、×５日以上収縮が残存 接着性：◎オレフィン単体発泡品と同程度の接着性、○
接着可能領域、△接着性やや不足、×接着性悪いThe extrusion characteristics of each of these Examples and Comparative Examples and the characteristics of the foams obtained are shown in Tables 1 and 2. In addition, in each table, the result of the characteristic evaluation of the foam is shown as follows. Discharge fluctuation (extrusion stability): ◎ No discharge fluctuation, ○ Discharging fluctuation is stable area, △ Discharging fluctuation is a little large, × Discharging fluctuation is large Foaming moldability / appearance: ◎ Best, ○ Good area, △ Sometimes insufficient , × Insufficient shrinkage: ◎ No shrinkage, ○ Shrinkage recovered within 1 day, △ 3-5
Day shrinkage remains, × 5 days or more shrinkage remains Adhesiveness: ◎ Adhesiveness equivalent to olefin simple foam, ○
Adhesive area, △ Adhesion is slightly insufficient, × Adhesion is poor
【００２５】[0025]
【表１】 [Table 1]
【００２６】[0026]
【表２】 [Table 2]
【００２７】以上、表１及び表２からも明らかなよう
に、水酸基含有樹脂と脂肪族エステルとを併用すること
により、吐出安定性もあり、成形性（外観含む）の良
い、収縮等による経時変化の少ない発泡体を安定的に得
られることが分かる。また、脂肪族エステルの添加量を
減らすことにより、アクリル系粘着剤等との接着性も向
上する。As is clear from Tables 1 and 2, the combined use of the hydroxyl group-containing resin and the aliphatic ester also provides ejection stability, good moldability (including appearance), and time-lapse due to shrinkage or the like. It can be seen that a foam with little change can be stably obtained. Further, by reducing the addition amount of the aliphatic ester, the adhesiveness with the acrylic pressure-sensitive adhesive or the like is improved.
【００２８】なお、表１及び表２に示した通り、水酸基
含有樹脂（エチレン酢酸ビニル共重合体ケン化物）の配
合量は、主原料比３０部以下が安定成形には好ましいと
いうことが分かる。これは、配合量が主原料比で３０部
を超えると発泡体が連泡になったり、表面性不良を起こ
したり、柔らかくなり過ぎたり、あるいは耐熱性の低下
を招いたりするためである。As shown in Tables 1 and 2, it is understood that the proportion of the hydroxyl group-containing resin (saponified ethylene vinyl acetate copolymer) is preferably 30 parts or less of the main raw material for stable molding. This is because when the blending amount exceeds 30 parts by weight of the main raw material, the foam becomes open-celled, causes poor surface properties, becomes too soft, or causes deterioration in heat resistance.
【００２９】[0029]
【発明の結果】以上説明した通り本発明によれば、ガス
逃散速度の大きい発泡剤を使用する場合でも、水酸基含
有樹脂を使用することにより、少量の収縮防止剤を添加
するだけで気泡収縮を防止することができ、押出し安定
性が高く、接着性の良好なポリオレフィン系樹脂発泡体
を得ることができる。As described above, according to the present invention, even when a foaming agent having a high gas escape rate is used, by using a hydroxyl group-containing resin, bubble shrinkage can be achieved by adding a small amount of shrinkage inhibitor. It is possible to obtain a polyolefin resin foam that can be prevented, has high extrusion stability, and has good adhesiveness.
───────────────────────────────────────────────────── 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 Ｃ０８Ｋ 5/20 ＫＥＷ 7242−4Ｊ Ｃ０８Ｌ 23/00 Ｂ２９Ｋ 23:00 105:04 Ｃ０８Ｌ 23:00 7107−4Ｊ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification number Office reference number FI technical display location C08K 5/20 KEW 7242-4J C08L 23/00 B29K 23:00 105: 04 C08L 23:00 7107- 4J
Claims (3)
肪族化合物からなる収縮防止剤と３〜３０重量部の水酸
基含有樹脂を混合し、この混合物にさらに適量の発泡剤
を添加した組成物を所定形状に押出し発泡させることを
特徴とするポリオレフィン系樹脂発泡体の製造方法。1. A composition obtained by mixing 100 parts by weight of a polyolefin resin with a shrinkage-preventing agent composed of an aliphatic compound and 3 to 30 parts by weight of a hydroxyl group-containing resin, and adding an appropriate amount of a foaming agent to the mixture to give a predetermined shape. A method for producing a polyolefin-based resin foam, which comprises extruding and foaming.
コールのモノエステル又はジエステル若しくはこれらの
混合物あるいは脂肪族アミン又はアミド化合物のいずれ
かである請求項１記載のポリオレフィン系樹脂発泡体の
製造方法。2. The method for producing a polyolefin resin foam according to claim 1, wherein the aliphatic compound is a monoester or diester of a fatty acid and a polyhydric alcohol, a mixture thereof, or an aliphatic amine or amide compound. .
上で且つ前記ポリオレフィン系樹脂の融点の±１０℃の
範囲内である請求項１又は２記載のポリオレフィン系樹
脂発泡体の製造方法。3. The method for producing a polyolefin resin foam according to claim 1, wherein the melting point of the hydroxyl group-containing resin is 100 ° C. or higher and is within ± 10 ° C. of the melting point of the polyolefin resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32653192A JP3167200B2 (en) | 1992-12-07 | 1992-12-07 | Method for producing polyolefin resin foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32653192A JP3167200B2 (en) | 1992-12-07 | 1992-12-07 | Method for producing polyolefin resin foam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06172579A true JPH06172579A (en) | 1994-06-21 |
| JP3167200B2 JP3167200B2 (en) | 2001-05-21 |
Family
ID=18188878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32653192A Expired - Fee Related JP3167200B2 (en) | 1992-12-07 | 1992-12-07 | Method for producing polyolefin resin foam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3167200B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998044032A1 (en) * | 1997-04-02 | 1998-10-08 | Sealed Air Corporation | Polyolefin products and process additives therefor having reduced transfer to substrates |
| US6156813A (en) * | 1997-10-06 | 2000-12-05 | Sealed Air Corporation | Polyolefin products and process additives therefor having reduced transfer to substrates |
| US9051683B2 (en) | 1997-02-28 | 2015-06-09 | Columbia Insurance Company | Carpet, carpet backings and methods |
| US9376769B2 (en) | 1997-02-28 | 2016-06-28 | Columbia Insurance Company | Homogeneously branched ethylene polymer carpet backsizing compositions |
-
1992
- 1992-12-07 JP JP32653192A patent/JP3167200B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9051683B2 (en) | 1997-02-28 | 2015-06-09 | Columbia Insurance Company | Carpet, carpet backings and methods |
| US9376769B2 (en) | 1997-02-28 | 2016-06-28 | Columbia Insurance Company | Homogeneously branched ethylene polymer carpet backsizing compositions |
| WO1998044032A1 (en) * | 1997-04-02 | 1998-10-08 | Sealed Air Corporation | Polyolefin products and process additives therefor having reduced transfer to substrates |
| US6005015A (en) * | 1997-04-02 | 1999-12-21 | Sealed Air Coporation | Polyolefin products and process additives therefor having reduced transfer to substrates |
| US6156813A (en) * | 1997-10-06 | 2000-12-05 | Sealed Air Corporation | Polyolefin products and process additives therefor having reduced transfer to substrates |
| US6232355B1 (en) | 1997-10-06 | 2001-05-15 | Sealed Air Corporation | Polyolefin products and process additives therefor having reduced transfer to substrates |
| US6406645B1 (en) | 1997-10-06 | 2002-06-18 | Sealed Air Corporation | Polyolefin products and process additives therefor having reduced transfer to substrates |
| US6518320B1 (en) | 1997-10-06 | 2003-02-11 | Sealed Air Corporation (U.S) | Polyolefin products and process additives therefor having reduced transfer to substrates |
| US6559194B2 (en) | 1997-10-06 | 2003-05-06 | Sealed Air Corporation (U.S.) | Polyolefin products and process additives therefor having reduced transfer to substrates |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3167200B2 (en) | 2001-05-21 |
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