JPS58215326A - Manufacture of polyolefin resin molding foamed in force - Google Patents
Manufacture of polyolefin resin molding foamed in forceInfo
- Publication number
- JPS58215326A JPS58215326A JP57098835A JP9883582A JPS58215326A JP S58215326 A JPS58215326 A JP S58215326A JP 57098835 A JP57098835 A JP 57098835A JP 9883582 A JP9883582 A JP 9883582A JP S58215326 A JPS58215326 A JP S58215326A
- Authority
- JP
- Japan
- Prior art keywords
- particles
- polyolefin resin
- expansion ratio
- force
- 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.)
- Pending
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
- B29C44/3461—Making or treating expandable particles
-
- 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
- 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
- B29C44/3415—Heating or cooling
- B29C44/3426—Heating by introducing steam in the mould
-
- 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
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
Abstract
Description
【発明の詳細な説明】
本発明はポリオレフィン樹脂型内発泡成型体の製造方法
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a polyolefin resin in-mold foam molded article.
従来より合成樹脂発泡成形体２例えばポリスチレン発泡
成形体、ポリエチレン発泡成形体等が包装材、緩衝材等
多方面に用いられている。これらの発泡成形体は例えば
押出成形または予備発泡粒子を用−いる所謂ビーズ成型
法によシ製造されている。ここでビーズ成型法により発
泡成型体を得る場合には、得ようとする発泡成型体の発
泡倍率に対応する予備発泡粒子を製造し、その予備発泡
粒子を用いて発泡成型体を製造しているが、何種類もの
見掛は発泡倍率の予備発泡粒子を製造しておく必要があ
り、保存のために非常に広いスペースが要求されるとい
う問題があった。また特定の発泡倍率を有する発泡成型
体の要求に応する為には予備発泡粒子の製造の条件を変
化させねばならず作業能率が悪いという問題があった。Conventionally, synthetic resin foam moldings 2 such as polystyrene foam moldings and polyethylene foam moldings have been used in a wide variety of applications such as packaging materials and cushioning materials. These foam molded articles are produced, for example, by extrusion molding or by the so-called bead molding method using pre-expanded particles. When obtaining a foamed molded product by the bead molding method, pre-expanded particles corresponding to the expansion ratio of the desired foamed molded product are manufactured, and the pre-expanded particles are used to manufacture the foamed molded product. However, there is a problem in that it is necessary to produce pre-expanded particles of various types with different expansion ratios, and that a very large space is required for storage. Furthermore, in order to meet the demand for a foam molded product having a specific expansion ratio, the conditions for producing pre-expanded particles must be changed, resulting in a problem of poor working efficiency.
本発明は上記従来技術の欠点を解消したポリオレフィン
樹脂型内発泡成型体の製造方法を提供することを目的と
するものであって１本発明者らは上記目的を達成すべく
鋭意研究した結果、異なる見掛は発泡倍率を有する予備
発泡粒子を混合して用いることＫより両者の予備発泡粒
子の見掛は発泡倍率の間にある発泡倍率を有する発泡成
型体が得られ、該発泡成型体は従来法により得られる発
泡成型体と同等またはそれ以上の成型性、物理的性質を
一有することを見出すと共にその製造方法の開発に成功
し２本発明を完成するに至った。The purpose of the present invention is to provide a method for manufacturing a polyolefin resin in-mold foam molded product that eliminates the drawbacks of the above-mentioned conventional techniques.1 As a result of the inventors' intensive research to achieve the above-mentioned object, By using a mixture of pre-expanded particles having different apparent expansion ratios, a foamed molded article having an apparent expansion ratio between the two pre-expanded particles can be obtained, and the foamed molded article is The present inventors have discovered that the foamed product has moldability and physical properties that are equivalent to or better than those obtained by conventional methods, and have succeeded in developing a method for producing the same, thereby completing the present invention.
すなわち２本発明は見掛は発泡倍率が異なる２種以上の
ポリオレフィン樹脂予備発泡粒子を成型用型内に混合充
填し、加熱発泡することを特徴とするポリオレフィン樹
脂型内発泡成型体の製造方法を要旨とするものである。In other words, the present invention provides a method for producing a polyolefin resin in-mold foam molded article, which comprises mixing and filling two or more types of polyolefin resin pre-expanded particles having apparently different expansion ratios into a mold, and heating and foaming them. This is a summary.
本発明において、ポリオレフィン樹脂予備発泡粒子の材
質としては１例えば低密度ポリエチレン（以下、ＬＤＰ
ＦＸと略称する。）、直鎖低密度ポリエチレン（以下、
ＬＬＤＰＥと略称する。）。In the present invention, the material of the pre-expanded polyolefin resin particles is 1, for example, low density polyethylene (hereinafter referred to as LDP).
It is abbreviated as FX. ), linear low-density polyethylene (hereinafter referred to as
It is abbreviated as LLDPE. ).
高密度ポリエチレン（以下、ＨＤＰＥと略称する。）等
のポリエチレン、ポリプロピレン単独重合体。Polyethylene and polypropylene homopolymers such as high-density polyethylene (hereinafter abbreviated as HDPE).
エチレン−プロピレン共重合体等のポリプロピレン系樹
脂、エチレン−α−オレフィン共重合体。Polypropylene resins such as ethylene-propylene copolymers, ethylene-α-olefin copolymers.
プロピレン−α−オレフィン共！合体、エチレン−ブタ
ジェン共重合体、ポリブテン等が挙げられる。同、上記
ポリオレフィン樹脂は架橋したもの無架橋のものいずれ
も用いることができるが無架橋のものが有益である。Propylene and α-olefin! Examples include polymers, ethylene-butadiene copolymers, and polybutenes. Similarly, both crosslinked and non-crosslinked polyolefin resins can be used, but non-crosslinked ones are advantageous.
本発明に用いられるポリオレフィン樹脂予備発泡粒子は
例えば次のような予備発泡方法によって製造することが
できる。すなわち１重合体粒子内に揮発性発泡剤を含有
させる工程、密閉容器内で重合体粒子を分散媒に分散さ
せ所定温度に加熱する工程、および容器の一端を開放し
、上記粒子と分散媒を同時に容器内よりも低圧の雰囲気
に放出する工程よりなる予備発泡方法によって製造する
ことができる。The pre-expanded polyolefin resin particles used in the present invention can be produced, for example, by the following pre-expanding method. That is, a step of incorporating a volatile blowing agent into one polymer particle, a step of dispersing the polymer particles in a dispersion medium in a closed container and heating it to a predetermined temperature, and a step of opening one end of the container and dispersing the particles and the dispersion medium. It can be manufactured by a pre-foaming method that includes a step of simultaneously releasing the foam into an atmosphere at a lower pressure than the inside of the container.
この方法に用いる揮発性発泡剤としては１例えｔｆ フ
、 ハン、フタン、ペンタン、ヘキサン、ヘプタン等で
例示される脂肪族炭化水素類、シクロブタン、シクロペ
ンタン等で例示される環式脂肪族炭化水素類、およびト
リクロロフロロメタン、ジクロロシフ０ロメタン、ジク
ロロテトラフロロエタン、メチルクロライド、エチルク
ロライド、メチレンクロライド等で例示されるハロゲン
化炭化水素類等が使用される。この発泡剤の添加量は通
常重合体粒子１００重量部に対し５〜４０重量部重量部
−られる。Volatile blowing agents used in this method include, for example, aliphatic hydrocarbons such as tf, phthane, pentane, hexane, heptane, etc., and cyclic aliphatic hydrocarbons such as cyclobutane, cyclopentane, etc. and halogenated hydrocarbons exemplified by trichlorofluoromethane, dichlorofluoromethane, dichlorotetrafluoroethane, methyl chloride, ethyl chloride, methylene chloride, and the like. The amount of the blowing agent added is usually 5 to 40 parts by weight per 100 parts by weight of the polymer particles.
この方法では重合体粒子と揮発性発泡剤を別々に或いは
揮発性発泡剤を重合体粒子に含有させた後分散媒に分散
させるが、このとき要すれば分散剤２例えば微粒状の酸
化アルミニウムおよび酸化チタン、塩基性炭酸マグネシ
ウム、塩基性炭酸亜鉛、炭酸カルシウム等を用いること
ができる。この分散剤の添加貴社通常重合体粒子１００
重量部に対し０４０１〜１０重量部である。また分散媒
は重合体粒子を溶解させない溶媒であればよく９例工ｔ
−ｊ’、 水、 エチレングリコール、グリセリン、
メタノール、エタノール等のうちの１種又はそれらの２
種以上の混合物が例示されるが通常は水が好ましい。In this method, the polymer particles and the volatile blowing agent are dispersed in a dispersion medium either separately or after the volatile blowing agent is contained in the polymer particles. Titanium oxide, basic magnesium carbonate, basic zinc carbonate, calcium carbonate, etc. can be used. Adding this dispersant to your company's normal polymer particles 100
It is 0401 to 10 parts by weight. The dispersion medium may be any solvent that does not dissolve the polymer particles.
-j', water, ethylene glycol, glycerin,
One or two of methanol, ethanol, etc.
Although a mixture of more than one species is exemplified, water is usually preferred.
この方法で社容器の一端を開放して重合体粒子と分散媒
とを同時に容器内よりも低圧の雰囲気に放出するが、こ
のときの容器内の温度は９０〜１７０℃が好筐しく、圧
力は揮発性発泡剤の蒸気圧以上または以下のいずれでも
よく、放出する雰囲気は通常常圧の雰囲気が選ばれる。In this method, one end of the container is opened and the polymer particles and dispersion medium are simultaneously released into an atmosphere with a lower pressure than the inside of the container. The pressure may be higher than or lower than the vapor pressure of the volatile blowing agent, and the atmosphere to be released is normally selected to be at normal pressure.
このようにして得られる予備発泡粒子は通常５〜１００
倍の見掛は発泡倍率を有する。この見掛は発泡倍率杖発
泡時の温度、圧力、揮発性発泡剤の量を適宜変えること
によって所望のものを得ることができる。The pre-expanded particles obtained in this way usually have a particle diameter of 5 to 100.
The apparent double has the foaming magnification. The desired appearance can be obtained by appropriately changing the expansion ratio, temperature and pressure during foaming, and the amount of volatile foaming agent.
上記の予備発泡粒子は成型に先立って要すれは常温、常
圧下熟成した後、要すれば窒素、空気等の無機ガスまた
は無機ガスと揮発性発泡剤との混合ガスを用いて所定圧
力所定時間熟成する。Prior to molding, the above pre-expanded particles are aged at room temperature and pressure, and then heated at a predetermined pressure for a predetermined period of time using an inorganic gas such as nitrogen or air, or a mixed gas of an inorganic gas and a volatile blowing agent. mature.
本発明において、見掛は発泡倍率が異なる２種以上の予
備発泡粒子を成型用型内に混合充填して加熱発泡するが
、予備発泡粒子の見掛は発泡倍率は１０〜８０倍の範囲
にあるものが好ましく、また最も低い方の見掛り発泡倍
率をＥｉ、最も高い方の見掛は発泡倍率をＥｊとした場
合２両者の関係は次式： １．１ ＜ Ｅｊ ／Ｅｉ
＜ ８によシ表わされる範囲にあるものが好ましく、さ
らに好ましくは１．２＜Ｅｊ／ Ｅｉ ＜ ６の範囲で
ある。Ｅｊ／Ｅｉが１．１以下の場合にはＥｊとＥｉの
発泡倍率が近似しすぎる為２両者間の任意の発泡倍率の
成型体を得るという本発明の所期の目的を達することが
困難となり、８以上の場合には得られる発泡成型体に斑
模様が生じたり。In the present invention, two or more types of pre-expanded particles having different apparent expansion ratios are mixed and filled into a mold and heated and foamed, but the apparent expansion ratio of the pre-expanded particles is in the range of 10 to 80 times. If one is preferable, and the lowest apparent foaming ratio is Ei, and the highest apparent foaming ratio is Ej, the relationship between the two is as follows: 1.1 < Ej /Ei
It is preferably in the range expressed by <8, and more preferably in the range 1.2<Ej/Ei<6. When Ej/Ei is 1.1 or less, the expansion ratios of Ej and Ei are too close, making it difficult to achieve the intended purpose of the present invention, which is to obtain a molded product with an arbitrary expansion ratio between the two. , 8 or more, the resulting foamed molded product may have a mottled pattern.
成形条件の許容範囲が狭くな乏傾同がある。There is a poor tendency in which the allowable range of molding conditions is narrow.
通常は上記予備発泡粒子を２種類用いて混合比を適宜変
えることによシ両者の見掛は発泡倍率の範囲内で所望の
発泡倍率の発泡成型体を得ることができる。予備発泡粒
子の混合比は特に限定されないが通常は１：８〜８：１
の範囲の比率（容積）で混合することが好ましい。また
、３種類以上の予備発泡粒子を混合して用いることもで
き、その場合Ｋｔｉ見掛は発泡倍率が最低のものと最高
のものの相異が大きいとき両者の中間程度の見駆−泡倍
率のものを適宜使用することによシ、成形性等を改善す
ることができるため有効である。Usually, by using two types of the above-mentioned pre-expanded particles and changing the mixing ratio as appropriate, it is possible to obtain a foamed molded article having a desired expansion ratio within the range of the apparent expansion ratio of both particles. The mixing ratio of pre-expanded particles is not particularly limited, but is usually 1:8 to 8:1.
It is preferable to mix at a ratio (volume) in the range of . In addition, three or more types of pre-expanded particles can be mixed and used, and in that case, Kti apparent is an intermediate value between the lowest foaming ratio and the highest foaming ratio when the difference between the lowest foaming ratio and the highest foaming ratio is large. It is effective because it can improve moldability, etc. by using it appropriately.
同２本発明において、見掛は発泡倍率は１０００ｄのビ
ーカーに樹脂密度ρｌ’／ｉ）の予備発泡粒子を充填し
たときの予備発泡粒子の重量Ｗ （５’）から次式：±
Ｑにより求めたものである。2 In the present invention, the apparent expansion ratio is the following formula from the weight W (5') of pre-expanded particles when filling a beaker with a resin density of ρl'/i) with an expansion ratio of 1000 d: ±
It was determined by Q.
冑、予備発泡粒子を成型用型内に混合充填するに当って
、同種のものが集まることなく均一またはランダムに分
散混合することが好ましい。When mixing and filling the helmet and pre-expanded particles into a mold, it is preferable to disperse and mix them uniformly or randomly without collecting the same kind of particles.
本発゛明において、成型用型としては通常用いられてい
る金型２例えば型面に加熱媒体が通過する小孔を有する
成型用金型を用いることができ、また加熱媒体としては
例えば１．２〜３．５１／ Ｊ （Ｇ）の水蒸気が用い
られ、これによシ型通りの発泡成型体を得ることができ
る。In the present invention, a commonly used mold 2, for example, a molding mold having small holes in the mold surface through which a heating medium passes can be used as the mold, and as the heating medium, for example, 1. Steam of 2 to 3.51/J (G) is used, and a foamed molded article can be obtained with this.
本発明によシ得られるポリオレフィン樹脂型内発泡成塑
体は９例えば包装材、ｉ！Ｌ衝材、保温材。The polyolefin resin in-mold foamed plastic product obtained according to the present invention can be used as a packaging material, for example, i! L shock material, heat insulation material.
断熱材、建築資材、車輛部材、浮揚材９食品容器等に用
いることができる。It can be used for insulation materials, building materials, vehicle components, flotation materials 9 food containers, etc.
以上説明したように２本発明によれば見掛は発泡倍率が
異なる２種類以上のポリオレフィン樹脂予備発泡粒子を
成型用型に混合、充填し、加熱発泡す：、ことによシ種
々の発泡倍率を有する発泡成型体を得ることができるの
で、見掛は発泡倍率が異なる数種類の予備発泡粒子を予
め製造しておけば発泡成型体が必要とされる場合、上記
予備発泡粒子を適宜選択して所望の発泡倍率を有する発
泡成型体を直ちに３に造することができるため生産効率
が良く、また保存する予備発泡粒子の種類も少なくて済
むためスペースも比較的必要としないので生産管理上有
益である等の利点を有する一方。As explained above, according to the present invention, two or more types of pre-expanded polyolefin resin particles having apparently different expansion ratios are mixed and filled into a mold, and heated and foamed. Therefore, if several types of pre-expanded particles with different apparent expansion ratios are manufactured in advance, when a foam-molded article is required, the pre-expanded particles can be selected as appropriate. Production efficiency is high because a foamed molded product having a desired expansion ratio can be immediately produced, and since the number of types of pre-expanded particles to be stored is small, relatively little space is required, which is beneficial for production management. On the other hand, it has some advantages.
得られる発泡成型体は従来の方法によシ得られる発泡成
型体と較べて同等またはそれ以上の成型性および物性を
有するものである。The resulting foamed molded product has moldability and physical properties equivalent to or better than those obtained by conventional methods.
以下、実施例を掲げて本発明をさらに詳細に説明する。Hereinafter, the present invention will be explained in more detail with reference to Examples.
実施例１〜５
密度０．９２３，９／ｉのＬＤＰＥ粒子を架橋処理して
ゲル分率５２％の架橋ＬＤＰＥ粒子を得た。Examples 1 to 5 LDPE particles with a density of 0.923.9/i were crosslinked to obtain crosslinked LDPE particles with a gel fraction of 52%.
オートクレーブに、上記架橋粒子１００重量部。100 parts by weight of the above crosslinked particles were placed in an autoclave.
ジクロロシフ０ロメタン１５または３５重量部。15 or 35 parts by weight of dichloromethane.
微粒状酸化アルミニウム０．５重量部および水３００重
量部を入れて加熱し、１００〜１２０℃でオートクレー
ブの一端を開放し架橋粒子と水とを同時に大気下に放出
して１５倍または４５倍の見掛は発泡倍率を有する予備
発泡粒子を得た。0.5 parts by weight of finely divided aluminum oxide and 300 parts by weight of water are heated, one end of the autoclave is opened at 100 to 120°C, and the crosslinked particles and water are released into the atmosphere at the same time, resulting in a concentration of 15 or 45 times. Pre-expanded particles having an apparent expansion ratio were obtained.
得られた２種類の予備発泡粒子を常温常圧下４８時間放
置後空気により ０．８ ｋｇ／ｉ （Ｇ）の内圧を付
与した後第１表に示す混合比で成型用金型内に混合充填
し、 １．３ ｋｇ／ａＪ （Ｇ）の水蒸気で加熱発
泡させて種々の発泡倍率を有する型内発泡成型体を得た
。The obtained two types of pre-expanded particles were left at room temperature and pressure for 48 hours, and after applying an internal pressure of 0.8 kg/i (G) with air, they were mixed and filled into a mold at the mixing ratio shown in Table 1. Then, the mixture was heated and foamed with 1.3 kg/aJ (G) of steam to obtain in-mold foam molded products having various expansion ratios.
得られた発泡成型体の成型性および外観は優れたもので
あった。The moldability and appearance of the obtained foam molded product were excellent.
実施例６〜９
エチレンＪｉｆｆ） ２．５重量係のエチレン−プロピ
レンランダム共重合体粒子１００重量部、ジクロロシフ
０ロメタン１３または２０重量部、微粒状酸化アルミニ
ウム０．５重量部および水３００重量部をオートクレー
ブに入れ、加熱した後１３０〜１５０℃の温度でオート
クレーブの一端を開放して共重合体粒子と水とを同時に
大気下に放出して発泡させて見掛は発泡倍率１５倍また
は４５倍の予備発泡粒子を得た。Examples 6-9 100 parts by weight of ethylene-propylene random copolymer particles of 2.5 parts by weight, 13 or 20 parts by weight of dichloromethane, 0.5 parts by weight of finely divided aluminum oxide and 300 parts by weight of water. After putting it in an autoclave and heating it, one end of the autoclave is opened at a temperature of 130 to 150°C, and the copolymer particles and water are released into the atmosphere at the same time to cause foaming, with an apparent foaming ratio of 15 times or 45 times. Pre-expanded particles were obtained.
得られた予備発泡粒子を常温常圧下４８時間放置後空気
により加圧熟成して０．６ ｋｇ／−（Ｇ）の内圧を付
与し２次いで第１表に示す混合比で成型用金型内に混合
充填し２．９ ｋｇ／ｃｊ （ｃ）の水蒸気で加熱発泡
させて発泡成型体を得た。得られた発泡成型体の成型性
および外観は優れたものであった。The obtained pre-expanded particles were left at room temperature and pressure for 48 hours, then aged under pressure with air to give an internal pressure of 0.6 kg/-(G), and then placed in a mold at the mixing ratio shown in Table 1. The mixture was mixed and filled and heated and foamed with 2.9 kg/cj (c) of water vapor to obtain a foamed molded product. The moldability and appearance of the obtained foam molded product were excellent.
実施例１Ｏ〜１８
ジクロロシフ０ロメタンの量を１０〜４０重量部とした
以外は実施例６と同様に行なって見掛は発泡倍率１０，
３０，６０．８０倍の予備発泡粒子を得た。Examples 10 to 18 The same procedure as in Example 6 was carried out except that the amount of dichlorosifluoromethane was changed to 10 to 40 parts by weight, and the apparent foaming ratio was 10.
Pre-expanded particles of 30 and 60.80 times were obtained.
得られた予備発泡粒子から第２表に示す３種類および４
種類の発泡倍率のものを選び実施例６と同様に常温常圧
下放置した後加圧熟成し１次いで第２表に示す混合比で
成型用金型内に混合充填し２．８に９／ａｄ（Ｇ）の水
蒸気を用いて加熱発泡させて発泡成型体を得た。得られ
た発泡成型体の成型性および外観は優れたものであった
。From the obtained pre-expanded particles, three types and four types shown in Table 2 were obtained.
Select foams with various foaming ratios, leave to stand at room temperature and normal pressure in the same manner as in Example 6, and then ripen under pressure. A foam molded product was obtained by heating and foaming using the steam of (G). The moldability and appearance of the obtained foam molded product were excellent.
Claims (1)
予備発泡粒子を成型用型内に混合充填し。 加熱発泡することを特徴とするポリオレフィン樹脂型内
発泡成型体の製造方法。[Claims] Two or more types of pre-expanded polyolefin resin particles having apparently different expansion ratios are mixed and filled into a mold. A method for producing a polyolefin resin in-mold foam molded article, which is characterized by heating and foaming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57098835A JPS58215326A (en) | 1982-06-09 | 1982-06-09 | Manufacture of polyolefin resin molding foamed in force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57098835A JPS58215326A (en) | 1982-06-09 | 1982-06-09 | Manufacture of polyolefin resin molding foamed in force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58215326A true JPS58215326A (en) | 1983-12-14 |
Family
ID=14230323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57098835A Pending JPS58215326A (en) | 1982-06-09 | 1982-06-09 | Manufacture of polyolefin resin molding foamed in force |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58215326A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62227631A (en) * | 1986-03-29 | 1987-10-06 | Kanegafuchi Chem Ind Co Ltd | Manufacture of beads method polystyrene in-mold foam molded body |
| JPH0550536A (en) * | 1991-08-26 | 1993-03-02 | Honshu Paper Co Ltd | Manufacture of paper container having heat insulation property |
| CN102672872A (en) * | 2012-05-25 | 2012-09-19 | 宁波高新区辉门科技有限公司 | Electronic irradiating crosslinked polyethylene foaming machine |
| CN102744887A (en) * | 2012-07-27 | 2012-10-24 | 山东泰山金润塑胶制品有限公司 | Cross-linked polyolefin foaming process and heat treatment device thereof |
| JP2012207165A (en) * | 2011-03-30 | 2012-10-25 | Sekisui Plastics Co Ltd | Method for manufacturing expansion molding, and expansion molding |
| CN105035455A (en) * | 2015-06-25 | 2015-11-11 | 湖北航天长征装备有限公司 | PE foaming once-molded large rotational molding packaging box and manufacturing process thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5010868A (en) * | 1973-06-04 | 1975-02-04 | ||
| JPS5150977A (en) * | 1974-10-31 | 1976-05-06 | Japan Styrene Paper Corp | Mozaikumoyoojusuru goseijushihatsuhoseikeihinno seizoho |
-
1982
- 1982-06-09 JP JP57098835A patent/JPS58215326A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5010868A (en) * | 1973-06-04 | 1975-02-04 | ||
| JPS5150977A (en) * | 1974-10-31 | 1976-05-06 | Japan Styrene Paper Corp | Mozaikumoyoojusuru goseijushihatsuhoseikeihinno seizoho |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62227631A (en) * | 1986-03-29 | 1987-10-06 | Kanegafuchi Chem Ind Co Ltd | Manufacture of beads method polystyrene in-mold foam molded body |
| JPH0550536A (en) * | 1991-08-26 | 1993-03-02 | Honshu Paper Co Ltd | Manufacture of paper container having heat insulation property |
| JP2012207165A (en) * | 2011-03-30 | 2012-10-25 | Sekisui Plastics Co Ltd | Method for manufacturing expansion molding, and expansion molding |
| CN102672872A (en) * | 2012-05-25 | 2012-09-19 | 宁波高新区辉门科技有限公司 | Electronic irradiating crosslinked polyethylene foaming machine |
| CN102672872B (en) * | 2012-05-25 | 2014-08-20 | 宁波高新区辉门科技有限公司 | Electronic irradiating crosslinked polyethylene foaming machine |
| CN102744887A (en) * | 2012-07-27 | 2012-10-24 | 山东泰山金润塑胶制品有限公司 | Cross-linked polyolefin foaming process and heat treatment device thereof |
| CN105035455A (en) * | 2015-06-25 | 2015-11-11 | 湖北航天长征装备有限公司 | PE foaming once-molded large rotational molding packaging box and manufacturing process thereof |
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