JPS6042433A - Expanded synthetic resin in-mold molding and its production - Google Patents
Expanded synthetic resin in-mold molding and its productionInfo
- Publication number
- JPS6042433A JPS6042433A JP58149299A JP14929983A JPS6042433A JP S6042433 A JPS6042433 A JP S6042433A JP 58149299 A JP58149299 A JP 58149299A JP 14929983 A JP14929983 A JP 14929983A JP S6042433 A JPS6042433 A JP S6042433A
- Authority
- JP
- Japan
- Prior art keywords
- expanded particles
- particles
- molding
- expansion force
- synthetic resin
- 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
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Molding Of Porous Articles (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は合成樹脂予備発泡粒子を成型用型に充填し加熱
成型して得られる合成樹脂発泡粒子屋内成型体およびそ
の製造方法に関し、更に詳しくは。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an indoor molded article of foamed synthetic resin particles obtained by filling a mold with pre-expanded synthetic resin particles and heating and molding the same, and a method for producing the same.
成型体の表面層を構成する発泡粒子が特定の偏平形状を
有する合成樹脂発泡粒子屋内成型体およびその製造方法
に関する。The present invention relates to an indoor molded product of synthetic resin foam particles in which the foamed particles constituting the surface layer of the molded product have a specific flat shape, and a method for producing the same.
近年、テーブル、コタツ板等の家具類の芯材。In recent years, it has been used as core material for furniture such as tables and kotatsu boards.
畳用芯材、風呂釜用断熱材、すのこ板、痣築用内装材等
の構築部材、あるいは自動車用部材等として合成樹脂発
泡体が広く用いられており、これら発泡体の製造方法と
しては予備発泡粒子を成型用型に充填して加熱成型する
。いわゆるビーズ成型法が知られている。しかしながら
従来のビーズ成型法によシ得られる発泡成型体は、該成
型体を構成する発泡粒子が、成型体表面層に位置する発
泡粒子および内面層に位置する発泡粒子ともに、全て球
形に近いほぼ同一形状を有するため、成型体全体として
の衝撃吸収性は有するものの表面層の剛性に劣る欠点が
あった。しかも成型体表面層の発泡粒子が球形に近い形
状を有するため、成型体表面の平滑性に乏しく、該成型
体を芯材として用いた場合に成核材との接合性が低下し
、特に壁紙等の如く薄い成核材を成型体表面に設けた場
合には、該成核材表面に成型体表面の凹凸が顕著に現わ
れ、著るしい外観低下をきたす等の欠点があった。Synthetic resin foams are widely used as construction materials such as core materials for tatami mats, insulation materials for bathtubs, slatted boards, interior materials for scar removal, and automobile parts, and there are no preliminary methods for manufacturing these foams. The expanded particles are filled into a mold and heated and molded. A so-called bead molding method is known. However, in the foamed molded product obtained by the conventional bead molding method, the foamed particles constituting the molded product are all approximately spherical, including the foamed particles located in the surface layer of the molded product and the foamed particles located in the inner layer. Since they have the same shape, although the molded body as a whole has shock absorbing properties, the surface layer has a disadvantage of poor rigidity. Moreover, since the foamed particles in the surface layer of the molded product have a nearly spherical shape, the surface of the molded product has poor smoothness, and when the molded product is used as a core material, the bondability with the nucleating material decreases, especially for wallpaper. When a thin nucleating material such as nucleating material is provided on the surface of a molded product, there are drawbacks such as noticeable irregularities on the surface of the molded product, resulting in a significant deterioration in appearance.
本発明者らは上記欠点を解消すべく鋭意研究した結果、
成型体表面部を構成する発泡粒子を特定の割合で偏平せ
しめた成型体が全体としての衝撃吸収性を有するととも
に表面剛性１表面平滑性に優れることを見い出すととも
にその製造方法を見い出し本発明を完成するに至った。As a result of intensive research by the present inventors to eliminate the above drawbacks,
It was discovered that a molded product in which the foamed particles constituting the surface of the molded product were flattened at a specific ratio had overall shock absorbing properties and excellent surface rigidity and surface smoothness. They also discovered a method for producing the same and completed the present invention. I ended up doing it.
即ち本発明の要旨とするところの−っは９合成樹脂予備
発泡粒子を成型用型内で発泡成型して得られる合成樹脂
発泡粒子型内成型体において、該成型体の表面層を構成
する発泡粒子の、平面方向゛ の平均径Ｌｆ（ｍＱと厚
さ方向の平均径Ｌｄ（＊りとの比が、 Ｌｆ ／Ｌｄ＞
３．５であることを特徴とする合成樹脂発泡粒子屋内
成型体にある。That is, the gist of the present invention is to provide a synthetic resin foam particle in-mold molded product obtained by foam-molding 9 synthetic resin pre-expanded particles in a mold, in which the foam constituting the surface layer of the molded product is The ratio of the average diameter Lf (mQ) of the particles in the plane direction and the average diameter Ld (*) in the thickness direction is Lf /Ld>
There is an indoor molded article of foamed synthetic resin particles characterized in that the particle size is 3.5.
本発明の要旨とするところの他の一つは、成型用型の壁
面と接する表層部に、加熱膨張力Ｐｓ（ｋｇ／ｌｒｉ・
絶対圧）が、該表層部より内側の内層部に充填された予
備発泡粒子の加熱膨張力ｐ＋ （ｋｇ／−・絶対圧）に
対してＰｉ ／ Ｐｓ ＞ １．’ ５なる関係を有す
る予備発泡粒子を充填し、加熱成型して表面層を構成す
る発泡粒子の平面方向の平均径Ｌｆ （ｍりと厚さ方向
の平均径Ｌｄ （ｍｍ）との比がＬｆ ／Ｌｄ ＞ ３
．５である成型体を得ることを特徴とする合成樹脂発泡
粒子型内成型体の製造方法にある。Another aspect of the present invention is that the heating expansion force Ps (kg/lri・
(absolute pressure) is Pi / Ps > 1. The average diameter Lf in the planar direction of the foamed particles that are filled with pre-expanded particles having a relationship of /Ld > 3
．． 5. A method for producing an in-mold molded article of foamed synthetic resin particles is provided.
本発明の合成樹脂発泡粒子型内成型体は、予備発泡粒子
を成型用型内で加熱成型するビーズ成型法によシ得られ
る。上記予備発泡粒子の基材樹脂としては、ポリエチレ
ン、ポリプロピレン、エチレン−プロピレン共重合体、
エチレン−ブテン共重合体、エチレン−酢酸ビニル共重
合体、ポリスチレン、ポリエステルエラストマー、ポリ
アミドエラストマー、ポリウレタンエラストマー等が例
示されこれらは架橋、無架橋のいずれでもよいが。The in-mold molded synthetic resin foam particles of the present invention are obtained by a bead molding method in which pre-expanded beads are heated and molded in a mold. The base resin of the pre-expanded particles includes polyethylene, polypropylene, ethylene-propylene copolymer,
Examples include ethylene-butene copolymer, ethylene-vinyl acetate copolymer, polystyrene, polyester elastomer, polyamide elastomer, polyurethane elastomer, etc., and these may be either crosslinked or non-crosslinked.
特に無架橋のエチレン−プロピレンランダム共重合体が
好ましい。Particularly preferred is a non-crosslinked ethylene-propylene random copolymer.
上記予備発泡粒子は２例えば密閉容器内で樹脂粒子を発
泡剤とともに分散媒に分散させ、所定温度に加熱した後
、容器の一端を開放し、樹脂粒子と分散媒とを容器内よ
シ低王の雰囲気下（通常は大気圧雰囲気下）に放出して
樹脂粒子を発泡せしめる等の方法によシ得られる。上記
発泡剤としては、二酸化炭素等の無機発泡剤、プロパン
、ブタン、ペンタン、ヘキサン、ヘプタン等で例示され
クロロフロロメタン、シクロロジフロロメターン。The above-mentioned pre-expanded particles can be prepared by dispersing the resin particles in a dispersion medium together with a blowing agent in a closed container, for example, and heating it to a predetermined temperature, then opening one end of the container, and dispersing the resin particles and dispersion medium inside the container. The resin particles can be obtained by a method such as foaming the resin particles by discharging the resin particles into an atmosphere (usually an atmospheric pressure atmosphere). Examples of the blowing agent include inorganic blowing agents such as carbon dioxide, propane, butane, pentane, hexane, heptane, etc., and chlorofluoromethane and cyclodifluoromethane.
ジクロロテトラフロロエタン、メチルクロンイド。Dichlorotetrafluoroethane, methylchloride.
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の揮発性発泡剤等が用いられる
。これらの発泡剤は通常樹脂粒子１００重量部に対して
５〜４０重量部重量部−られる。また分散媒は樹脂粒子
を溶解させない溶媒であればよく１例えば水、エチレン
グリコール。Volatile blowing agents such as halogenated hydrocarbons such as ethyl chloride and methylene chloride are used. These blowing agents are usually used in an amount of 5 to 40 parts by weight per 100 parts by weight of the resin particles. The dispersion medium may be any solvent that does not dissolve the resin particles, such as water or ethylene glycol.
グリセリン、メタノール、エタノール等のうちの１ｆ１
またはそれらの２種以上の混合物が例示されるが通常は
水が好ましい・。1f1 of glycerin, methanol, ethanol, etc.
Or a mixture of two or more thereof is exemplified, but water is usually preferred.
本発明において上記予備発泡粒子の加熱膨張力とは、予
備発泡粒子を＠３００Ｉ＋ｌ！×長さ３００闘Ｘ厚さ３
０闘の金型に充填して加熱した際に予備発泡粒子の膨張
によシ金型面に作用する最大面圧であり、該加熱膨張力
は、予備発泡粒子製造時の基材樹脂の種類の選定９発泡
剤添加量１発泡温度。In the present invention, the heating expansion force of the pre-expanded particles is defined as @300I+l! x Length 300mm x Thickness 3
This is the maximum surface pressure that acts on the mold surface due to the expansion of the pre-expanded particles when they are filled into a mold with zero pressure and heated, and the heating expansion force depends on the type of base resin at the time of producing the pre-expanded particles. Selection 9 Foaming agent addition amount 1 Foaming temperature.
発泡時の圧力９発泡後の予備発泡粒子の養生条件。Pressure during foaming 9Curing conditions for pre-expanded particles after foaming.
予備発泡粒子の加圧処理条件等の調節によシ所定の値と
することができる。It can be set to a predetermined value by adjusting the conditions for pressurizing the pre-expanded particles.
次に本発明の一実施例を図面に基き説明する。Next, one embodiment of the present invention will be described based on the drawings.
第１図に示すように本発明の合成樹脂発泡粒子型内成型
体１は、該成型体１の表面Ｗｉ２を構成する発泡粒子３
が、偏平した円盤形状を有し、内面Ｍ４’ｌｉ：構成す
る発泡粒子５は球形に近い形状を有する。表面層２の発
泡粒子３は平面方向の平均径Ｌｆ（闘）と厚さ方向の平
均径Ｌｄ （１１１１）との間にＬｆ／Ｌｄ〉３．５好
ましくはＬｆ／Ｌｄ＞５なる関係を有する。As shown in FIG. 1, the synthetic resin foam particle in-mold molded body 1 of the present invention has foamed particles 3 constituting the surface Wi2 of the molded body 1.
However, it has a flattened disk shape, and the foamed particles 5 forming the inner surface M4'li have a shape close to a spherical shape. The foamed particles 3 of the surface layer 2 have a relationship between the average diameter Lf in the planar direction and the average diameter Ld in the thickness direction (1111) such that Lf/Ld>3.5, preferably Lf/Ld>5. .
Ｌｆ ／ Ｌｄが３．５以下となると表面平滑性１表面
剛性が低下する。上記Ｌｆは同図に示すように発泡粒子
３の平面方向の粒子径ノｆの平均値であシ、 Ｌｄは厚
さ方向の粒子径ノｄの平均値である。Ｌｄは通常０．０
１〜２ｍｍ、Ｌｆは１〜１０朋であることが好ましい。When Lf/Ld is 3.5 or less, surface smoothness 1 surface rigidity decreases. As shown in the figure, Lf is the average value of the particle diameter f in the planar direction of the expanded particles 3, and Ld is the average value of the particle diameter d in the thickness direction. Ld is usually 0.0
It is preferable that the length is 1 to 2 mm, and Lf is 1 to 10 mm.
また上記表面層２の厚さｄは成型体１の１５撃吸収性を
維持しかつ表面剛性の向上を図るためには通常成壓体１
の厚さＤの２％〜１０％であることが好ましい。上記構
成含有する表面層２は成型体１の表裏両面に設けられた
場合に限らず９片面にのみ設けられたものでもよい。In addition, the thickness d of the surface layer 2 is normally set to 15 in order to maintain the impact absorption properties of the molded body 1 and to improve the surface rigidity.
It is preferable that it is 2% to 10% of the thickness D of . The surface layer 2 containing the above structure is not limited to the case where it is provided on both the front and back surfaces of the molded body 1, but may be provided only on one side.
上記本発明の成型体１は次のようにして製造することが
できる。即ち例えば第２図に示す如き仕切板６．６によ
シ成呈室を３分割した成型用型７鵞用い、成型用ｍ７の
壁面８．８と接する表層部側の成屋室９，９には、該成
壓室９，９よシ内側に位置する成屋室１０に供給口１１
よシ供給されて充填された予備発泡粒子１２の加熱膨張
力Ｐｉ（ｋｇ／ｄ・絶対圧）に対してＰｉ／Ｐｓ＞ １
．５ 、好ましくはＰｉ／Ｐｓ）２となる加熱膨張力Ｐ
ｓ （ｋｌ ／ ｃｒｌ ・絶対圧）を有する予備発泡
粒子１３を供給口１４゜１４よシ供給して充填する。し
かる後仕切板６゜６′？：取り除き、１．０ｋｌ？ ／
ｃＪ（Ｇ） 〜５． Ｏｋｇ ／ ｃＪ（Ｇ）の水蒸
気等により加熱する。加熱によシ成型室９゜９内に充填
された表層部の予備発泡粒子１３および成型室１０内に
充填された内層部の予備発泡粒子１２はともに膨張する
が２表層部の予備発泡粒子１３社内層部の予備発泡粒子
１２よシも加熱膨張力が小さいため、内層部の予備発泡
粒子１２の膨張によって該予備発泡粒子１２と成型用型
７の壁面８とで挟圧される結果偏平して膨張し、以って
第１図に示す構造の成型体１が得られる。The molded article 1 of the present invention described above can be manufactured as follows. That is, for example, a forming chamber 7 is divided into three parts by a partition plate 6.6 as shown in FIG. In this case, a supply port 11 is provided in the finishing chamber 10 located inside the finishing chambers 9, 9.
Pi/Ps>1 with respect to the heating expansion force Pi (kg/d・absolute pressure) of the pre-expanded particles 12 supplied and filled.
．． 5, preferably Pi/Ps)2 heating expansion force P
Pre-expanded particles 13 having a pressure of s (kl/crl/absolute pressure) are supplied through the supply port 14 and filled. The rear partition plate 6゜6'? : Removed, 1.0kl? /
cJ(G) ~5. Heating with water vapor, etc. of Okg/cJ (G). When heated, both the surface pre-foamed particles 13 filled in the molding chamber 9°9 and the inner layer pre-foamed particles 12 filled in the molding chamber 10 expand; Since the heating expansion force is smaller than that of the pre-expanded particles 12 in the in-house layer section, the expansion of the pre-expanded particles 12 in the inner layer section causes the pre-expanded particles 12 to be pressed between the pre-expanded particles 12 and the wall surface 8 of the mold 7, resulting in flattening. The molded body 1 having the structure shown in FIG. 1 is obtained.
上記の方法に用いられる予備発泡粒子は発泡倍率１０〜
８０倍９粒子の平均径０．８〜１０１１１１のものが好
ましく９表層部の予備発泡粒子１３は加熱膨張力Ｐ８が
２ ｋｇ ／ ｃｙｄ （絶対圧）未満、内層部の予備
発泡粒子１２は加熱膨張力ｐｔが２ ｋｇ／ ｔｒｉ
（絶対圧）以上であるとともに前述の如（Ｐｉ ／Ｐｓ
＞ １．５好ましくはＰｉ／Ｐｓ＞２となるものを用
いる。The pre-expanded particles used in the above method have an expansion ratio of 10 to
Pre-expanded particles 13 in the surface layer have a thermal expansion force P8 of less than 2 kg/cyd (absolute pressure), and the pre-expanded particles 12 in the inner layer have a thermal expansion force of less than 2 kg/cyd (absolute pressure). Force pt is 2 kg/tri
(absolute pressure) or more and as mentioned above (Pi /Ps
>1.5, preferably Pi/Ps>2.
また上記した如き仕切板を有す′る成型用型を用いる場
合に限られず、成型室内容積を拡大できるように構成さ
れた成型用型にまず加熱膨張力Ｐｉを有する予備発泡粒
子を充填した後、成型用型を拡大しつつ表層部側に上記
加熱膨張力Ｐｉに対してＰｌ／ｐｓ＞ｔ、ｓとなる加熱
膨張力Ｐｔ＋を有する予備発泡粒子を充填して加熱する
方法によってもよい。In addition, it is not limited to the case where a mold having a partition plate as described above is used, but after filling a mold configured to expand the internal volume of the molding chamber with pre-expanded particles having a thermal expansion force Pi, Alternatively, while enlarging the mold, the surface layer side may be filled with pre-expanded particles having a thermal expansion force Pt+ such that Pl/ps>t,s with respect to the thermal expansion force Pi, and then heated.
以上説明したように本発明の成型体は１表面層を構成す
る発泡粒子が、内面層を構成する発泡粒子に比べ、平面
方向の平均径Ｌｆと厚さ方向の平均径ＬｄがＬｆ／Ｌｄ
＞ ３．５となるよう偏平した形状を有するため、成
型体表面が従来の成型体に比して極めて滑らかであると
ともに、成型体全体としての衝撃吸収性を維持したまま
表面層の剛性向上を図ることができる効果を有する。As explained above, in the molded article of the present invention, the foamed particles constituting one surface layer have an average diameter Lf in the plane direction and an average diameter Ld in the thickness direction Lf/Ld compared to the foamed particles constituting the inner surface layer.
> 3.5, the surface of the molded body is extremely smooth compared to conventional molded bodies, and the rigidity of the surface layer can be improved while maintaining the impact absorption properties of the molded body as a whole. It has the effect that can be achieved.
また本発明方法によれば、加熱膨張力の異なる予備発泡
粒子を層別に充填し加熱発泡せしめるという簡単な作業
によシ上記の成型体を確定かつ容易に製造することがで
きる。Further, according to the method of the present invention, the above-mentioned molded body can be manufactured reliably and easily by a simple operation of filling pre-expanded particles having different heating expansion powers in layers and heating and foaming them.
以下、具体的実施例を挙げて本発明を更に詳細に説明す
る。Hereinafter, the present invention will be explained in more detail by giving specific examples.
実施例１〜３．比較例１〜４
実施例、比較例において用いた予備発泡粒子１〜５は以
下のようにして製造した。Examples 1-3. Comparative Examples 1 to 4 Pre-expanded particles 1 to 5 used in Examples and Comparative Examples were manufactured as follows.
く予備発泡粒子１〉
エチレン成分含有量３．０重量係、メルトインデックス
７．８Ｊ９／１０分のエチレン−プロピレンランダム共
重合体よシなる平均粒径１．５闘の樹脂粒子１００重量
部、ジクロロシフ０口メタン１８重員部、微粒状酸化ア
ルミニウム０．５重量部、水２５０重量部をオートクレ
ーブに入れ、１４３℃＼Ｊ
に外淵した。このときのオートクレーブ内圧は２４ ｋ
ｇ／ ｄ（Ｇ）であった。次いで窒素ガスによシオート
クレープ内圧’ｔ−３０ｋｇ／６Ａ（Ｇ）に維持しつつ
オートクレーブの一端を開放し、樹脂粒子と水とを大気
圧下に放出して樹脂粒子を発泡せしめた。Pre-expanded particles 1> 100 parts by weight of resin particles with an average particle size of 1.5 mm made of ethylene-propylene random copolymer with an ethylene content of 3.0 weight and a melt index of 7.8 J9/10, dichlorosif 18 parts by weight of methane, 0.5 parts by weight of finely divided aluminum oxide, and 250 parts by weight of water were placed in an autoclave, and the autoclave was heated to 143°C\J. The internal pressure of the autoclave at this time was 24 k.
g/d(G). Next, one end of the autoclave was opened while maintaining the internal pressure of the autoclave at -30 kg/6A (G) using nitrogen gas, and the resin particles and water were discharged to atmospheric pressure to foam the resin particles.
この予備発泡粒子を常温、常圧下で４８時間放置し１粒
子内のジクロロジフロロメタンを空気置換したものを予
備発泡粒子１とした。These pre-expanded particles were allowed to stand at room temperature and under normal pressure for 48 hours, and the dichlorodifluoromethane in each particle was replaced with air, thus forming pre-expanded particles 1.
く予備発泡粒子２〉
上記予備発泡粒子１を加圧タンクに入れ空気によｌ）
０．０５ ｋｌ ／ ｃｄ ／ ｈｒの昇圧速′度で２
．６ ｋｇ ＃Ｊ（Ｇ）まで昇圧して加圧処理し粒子内
圧３． ｓ ｋｇ ／ ｔｒｉ （絶対圧）１ｉ−付与
せしめ予備発泡粒子２とした。Pre-expanded particles 2〉 Put the above-mentioned pre-expanded particles 1 into a pressurized tank and blow air into it.
2 at a boost rate of 0.05 kl/cd/hr
．． The pressure is increased to 6 kg #J (G) and the internal pressure of the particles is 3. s kg/tri (absolute pressure) 1i- was applied to obtain pre-expanded particles 2.
〈予備発泡粒子３〉
予備発泡粒子１と同一の原料を同一の配合でオートクレ
ーブに仕込み、一旦１５５℃まで昇温した後、１４０℃
まで降温し該温度においてオートクレーブ内圧を５ｏｋ
１？／ｃｒ／１（Ｇ）に維持しつつ、樹脂粒子と水とを
大気圧下に放出して樹脂粒千金発泡せしめた。この予備
発泡粒子を常温、常圧下で４８時間放置して予備発泡粒
子３とした。<Pre-expanded particles 3> The same raw materials as those for pre-expanded particles 1 were charged into an autoclave with the same composition, and the temperature was once raised to 155°C, then 140°C.
At that temperature, the autoclave internal pressure was increased to 5ok.
1? /cr/1 (G), the resin particles and water were released under atmospheric pressure to cause the resin particles to foam. The pre-expanded particles were left at room temperature and under normal pressure for 48 hours to obtain pre-expanded particles 3.
く予１１１１発泡粒子４〉
予備発泡粒子１′Ｉｉ−予備発泡粒子２と同様の方法に
よ！＋０．７ｋｇ／ｄ（Ｇ）まで昇圧して加圧処理し。1111 Expanded particles 4> Pre-expanded particles 1'Ii - Same method as pre-expanded particles 2! The pressure was increased to +0.7 kg/d (G) and the pressure was applied.
粒子内圧１．５ ｋｌ ／ ｃｒｌｉ （絶対圧）を付
与せしめて予備発泡粒子４とした。Pre-expanded particles 4 were obtained by applying a particle internal pressure of 1.5 kl/crli (absolute pressure).
（予備発泡粒子５〉
予備発泡粒子３ｔ−予備発泡粒子２と同様の方法により
１．２ ｋｙ ／ ｃａ （Ｇ）まで昇圧して加圧処理
し。(Pre-expanded particles 5) Pre-expanded particles 3t - Pressurized by increasing the pressure to 1.2 ky/ca (G) in the same manner as for pre-expanded particles 2.
粒子内圧２．０ ｋｇ／ ｃａ （絶対圧）を付与せし
めて予備発泡粒子５とした。A particle internal pressure of 2.0 kg/ca (absolute pressure) was applied to obtain pre-expanded particles 5.
する厚さ５０闘Ｘｌｔ９ｉ３００ｍｘ長さ３００闘（内
寸法）の成型用型に充填し仕切板を取シ除いた後。After filling a mold with a thickness of 50cm x 300m x length of 300cm (inner dimensions) and removing the partition plate.
３．４ｋｙ／ｃ＋Ｊ（Ｇ）の水蒸気により加熱して予備
発泡粒子を発泡ＰＩ＃彊せしめ成型体ｔ−得た。得られ
た各成瀧体の物性ｔ−測測定た結果′を第２表に示す。The pre-expanded particles were heated with steam of 3.4 ky/c+J (G) to form foamed PI# to obtain a molded article. Table 2 shows the results of the t-measurement of the physical properties of each of the obtained grown bodies.
また成型体の宍面から２ＩＩＩＩｔでの表面層ｔ−構成
する発泡粒子の平面方向の平均径Ｌｆと厚さ方向の平均
径Ｌｄを測定した結果を第２表に示す。Further, Table 2 shows the results of measuring the average diameter Lf in the plane direction and the average diameter Ld in the thickness direction of the foamed particles constituting the surface layer t at 2IIIt from the bottom of the molded body.
岡、成型用型の、相対向する壁面と各々接する表層部お
よび該表層部よシ内偶の内層部に充填した予備発泡粒子
の種類を第２表にあわせて示した。Table 2 also shows the types of pre-expanded particles that were filled in the surface layer portions of the molds that were in contact with the opposing wall surfaces, and the inner layer portions between the surface layer portions and the inner layer portions.
※ｌ Ｌｆ、Ｌｄは成型体縦断面の上面よシ３龍以内に
ある発泡粒子よシランダムに５０個を選び顕微鏡（フッ
−株式会社製デジタル顕微鏡 ＭＳ−２２４）により測
定した値の平均値である。*Lf and Ld are the average values of the values measured using a microscope (Digital Microscope MS-224 manufactured by Fu-Co., Ltd.) selected from 50 foamed particles within 3 degrees of the top surface of the vertical section of the molded product. be.
※２ 成型体の成型性り。*2 Molding properties of the molded object.
成型体の、成型用型面方向に対する
収縮率が２％未満で型ｉＪ１シの成型体が得られる・−
−−−一−−・−・−＝０収縮率が２〜３％未満であシ
はぼ型通シの成型体が得られるが冷却に長時間を要する
一−−−−−−−−−−−−−−−△収縮率が３％以上
の成型体となる・−・−−−−−−−・−・−・−×と
して判定した。A molded body of type iJ1 can be obtained with a shrinkage rate of the molded body in the direction of the mold surface of less than 2%.
−−−1−−・−・−=0 If the shrinkage rate is less than 2 to 3%, a round-shaped molded product can be obtained, but it takes a long time to cool down.−−−−−−−− -----------------------------------------------------------------------------------------------------------------------------------------
※３ 曲げ強さは１Ｊ２５闘、長さ３００ｎの試験片を
長さ１５０鯖が試験台より突出するように試験台に固定
し、突出した試験片の先端に５００ｇの荷重をのせた時
に生ずるたわみ１（ｊＩＩＩ）で表示した。*3 The bending strength is 1J25, and the deflection that occurs when a 300n long test piece is fixed on a test stand with a length of 150 nm protruding from the test stand and a 500g load is placed on the tip of the protruding test piece. 1 (jIII).
※４１ｒｌｊ撃吸収性は水平状態の成形体表面に、直径
６５朋の円形底面を有する２ｋｌｌの分銅を１ｍの高さ
から自然落下させ（このとき。*41rlj Shock absorption was measured by dropping a 2kll weight with a circular base of 65 mm in diameter naturally onto the surface of the molded product in a horizontal state from a height of 1 m (at this time).
分銅の円形底面を水平にして落下させる）。(Drop the weight with its circular bottom horizontally).
落下後の成形体の表面状態により判定した。Judgment was made based on the surface condition of the molded product after it was dropped.
表面が破れず変形も殆んどなし−−−−−−−−−−−
・−−−−０表面に変形が残るー・−−−−−−−−−
〜−−−−・−−一一−−−−・Δ表面に裂傷が生ずる
−・−−−−−−−−・−−一−−−−・−−−−ｘ※
５ 表面状態は
表面平滑で凹凸、しわがきわめて
小さい・−・−−−−−−−−−−０
表面凹凸、しわがやや大きい −・−・・−−−−−−
−−−６表面平滑性に劣シ、凹凸、しわが
大きい・−・−−−−−−−ｘ
として判定した。The surface is not torn and there is almost no deformation.
・-----Deformation remains on the surface-----------
〜−−−−・−−１−−−−・Δ Tears occur on the surface−・−−−−−−−−・−−１−−−−・−−−−x※
5 The surface condition is smooth with very small irregularities and wrinkles ---------0 Surface irregularities and wrinkles are somewhat large ---------
---6 Poor surface smoothness, large unevenness, and wrinkles -------x
図面拡本発明の一実施例を示すもので、第１図は本発明
成型体の要部縦断面図、第２図は本発明の成狙体の製造
方法において用いられる成型用型の一例を示す縦断面略
図である。
１−一一一合成樹脂発泡粒子型内成型体８・−・−表面
層の発泡粒子 ８−−−−一壁面１．２−−・−内層部
の予備発泡粒子 ＋ ８−−−−−−一表層部の予備発
泡粒子
第１図The drawings are enlarged to show one embodiment of the present invention. Fig. 1 is a longitudinal cross-sectional view of a main part of a molded body of the present invention, and Fig. 2 is an example of a mold used in the method for manufacturing a target body of the present invention. FIG. 1-11 Synthetic resin foamed particle in-mold molded body 8 --- Foamed particles in the surface layer 8 --- One wall surface 1.2 --- Pre-expanded particles in the inner layer + 8 --- - Figure 1 of pre-expanded particles in one surface layer
Claims (2)
して得られる合成樹脂発泡粒子屋内成型体において、該
成型体の表面層を構成する発泡粒子の、平面方向の平均
径Ｌｆ （闘） と厚さ方向の平均径Ｌｄ（闘）との比
が、Ｌｆ／Ｌｄ＞３．５であることを特徴とする合成樹
脂発泡粒子型内成型体。(1) In an indoor molded synthetic resin foamed particle obtained by foam-molding synthetic resin pre-expanded particles indoors for molding, the average diameter Lf in the planar direction of the foamed particles constituting the surface layer of the molded object. An in-mold molded article of foamed synthetic resin particles, characterized in that the ratio of Lf/Ld to the average diameter Ld in the thickness direction is Lf/Ld>3.5.
Ｐｓ（ｋｇ ／ ｃｄ・絶対圧）が、該表層部よ）内側
の内層部に充填された予備発泡粒子の加熱膨張力Ｐｉ（
ｋｆ ／ ｄ ・絶対圧）に対してＰｉ ／ Ｐｓ ＞
１．５なる関係を有する予備発泡粒子を充填し一加熱成
型して表面層を構成する発泡粒子の平面方向の平均径Ｌ
ｆ（ｍ）と厚さ方向の平均径Ｌｄ （ｍｍ）との比がＬ
ｆ ／Ｌｄ ＞ ３．５である成型体を得ることを特徴
とする合成樹脂発泡粒子型内成型体の製造方法。(2) The heating expansion force Ps (kg/cd・absolute pressure) is applied to the surface layer in contact with the wall surface of the mold, and the heating expansion force Pi (
kf/d・absolute pressure) vs. Pi/Ps>
Average diameter L in the planar direction of foamed particles that are filled with pre-expanded particles having a relationship of 1.5 and then heat-molded to form a surface layer.
The ratio of f (m) to the average diameter Ld (mm) in the thickness direction is L
A method for producing an in-mold molded article of foamed synthetic resin particles, characterized by obtaining a molded article in which f /Ld > 3.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58149299A JPS6042433A (en) | 1983-08-16 | 1983-08-16 | Expanded synthetic resin in-mold molding and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58149299A JPS6042433A (en) | 1983-08-16 | 1983-08-16 | Expanded synthetic resin in-mold molding and its production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6042433A true JPS6042433A (en) | 1985-03-06 |
| JPH0414058B2 JPH0414058B2 (en) | 1992-03-11 |
Family
ID=15472125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58149299A Granted JPS6042433A (en) | 1983-08-16 | 1983-08-16 | Expanded synthetic resin in-mold molding and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6042433A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63108727U (en) * | 1986-12-30 | 1988-07-13 | ||
| US4777000A (en) * | 1985-11-29 | 1988-10-11 | Japan Styrene Paper Corporation | Production method of expansion-molded article of polypropylene resin |
| JP2006240285A (en) * | 2005-02-01 | 2006-09-14 | Kaneka Corp | Thermoplastic resin in-mold foamed molded product and its manufacturing method |
| JP2011068776A (en) * | 2009-09-25 | 2011-04-07 | Sekisui Plastics Co Ltd | Foam-molded article |
| JP2012176686A (en) * | 2011-02-25 | 2012-09-13 | Sekisui Plastics Co Ltd | Railway vehicular interior material |
| WO2019198642A1 (en) * | 2018-04-09 | 2019-10-17 | 旭化成株式会社 | Foam molding and method for producing same |
| WO2024042810A1 (en) * | 2022-08-22 | 2024-02-29 | パナソニックＩｐマネジメント株式会社 | Heat insulating wall and heat insulating container |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS493639U (en) * | 1972-04-13 | 1974-01-12 | ||
| JPS54174682U (en) * | 1978-05-30 | 1979-12-10 |
-
1983
- 1983-08-16 JP JP58149299A patent/JPS6042433A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS493639U (en) * | 1972-04-13 | 1974-01-12 | ||
| JPS54174682U (en) * | 1978-05-30 | 1979-12-10 |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4777000A (en) * | 1985-11-29 | 1988-10-11 | Japan Styrene Paper Corporation | Production method of expansion-molded article of polypropylene resin |
| JPS63108727U (en) * | 1986-12-30 | 1988-07-13 | ||
| JPH051380Y2 (en) * | 1986-12-30 | 1993-01-14 | ||
| JP2006240285A (en) * | 2005-02-01 | 2006-09-14 | Kaneka Corp | Thermoplastic resin in-mold foamed molded product and its manufacturing method |
| JP2011068776A (en) * | 2009-09-25 | 2011-04-07 | Sekisui Plastics Co Ltd | Foam-molded article |
| JP2012176686A (en) * | 2011-02-25 | 2012-09-13 | Sekisui Plastics Co Ltd | Railway vehicular interior material |
| WO2019198642A1 (en) * | 2018-04-09 | 2019-10-17 | 旭化成株式会社 | Foam molding and method for producing same |
| JPWO2019198642A1 (en) * | 2018-04-09 | 2020-12-03 | 旭化成株式会社 | Foam molded product and its manufacturing method |
| US11235553B2 (en) | 2018-04-09 | 2022-02-01 | Asahi Kasei Kabushiki Kaisha | Foam molded product and method of producing same |
| WO2024042810A1 (en) * | 2022-08-22 | 2024-02-29 | パナソニックＩｐマネジメント株式会社 | Heat insulating wall and heat insulating container |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0414058B2 (en) | 1992-03-11 |
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