JPH0622925B2 - Porous resin media manufacturing method and porous resin media mold - Google Patents
Porous resin media manufacturing method and porous resin media moldInfo
- Publication number
- JPH0622925B2 JPH0622925B2 JP63054473A JP5447388A JPH0622925B2 JP H0622925 B2 JPH0622925 B2 JP H0622925B2 JP 63054473 A JP63054473 A JP 63054473A JP 5447388 A JP5447388 A JP 5447388A JP H0622925 B2 JPH0622925 B2 JP H0622925B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- resin
- porous resin
- porous
- media
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、例えばバレル加工法によるジーンズ生地のほ
ぐし及び脱色加工に使用される多孔質樹脂メディアの製
造方法及び多孔質樹脂メディア用鋳型に関し、特に、天
然の軽石に勝るとも劣らない程度に粗荒な多孔質の表面
を有する多孔質樹脂メディアが得られる多孔質樹脂メデ
ィアの製造方法に及び多孔質樹脂メディア用鋳型に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a method for producing a porous resin medium used for loosening and decolorizing jeans cloth by a barrel processing method and a mold for the porous resin medium, In particular, the present invention relates to a method for producing a porous resin medium that can obtain a porous resin medium having a rough porous surface that is not inferior to natural pumice, and a mold for a porous resin medium.
近年、バレル加工の技術がジーンズ生地のほぐし及び脱
色加工に応用されており、このようなバレル加工に使用
されるメディアには、ほぐし加工の加工効率を高めるた
めに粗荒な表面を有することと、脱色剤等を担持できる
ように多孔質であることと、メディアを処理液の上部に
浮上させ、これにより加工物との接触効率の向上及び糸
切れの防止が図れるようにするために真比重が1以下で
あることとが要求される。In recent years, barreling technology has been applied to loosening and decolorizing jeans fabric, and media used for such barreling have a rough surface to increase the processing efficiency of loosening. , It is porous so that it can carry a decolorizing agent, etc., and the media is floated above the processing liquid, which improves the contact efficiency with the work piece and prevents yarn breakage. Is required to be 1 or less.
天然の軽石は、真比重が1以下であり、また、表面が粗
荒であるとともに多孔質であるので、初期の段階におい
ては天然の軽石がメディアとしてジーンズ生地のほぐし
及び脱色加工に使用されたこともある。Natural pumice stones have a true specific gravity of 1 or less, and their surfaces are rough and porous, so natural pumice stones were used as media for loosening and decolorizing jeans fabric in the early stages. Sometimes.
しかしながら、天然の軽石は脆弱であり、耐久性が著し
く低いので、これに代わって多孔質樹脂メディアが多用
されるようになっている。However, since natural pumice stone is fragile and has extremely low durability, porous resin media have been widely used instead.
従来、この種の多孔質樹脂メディアとしては、例えば特
開昭60−242960号公報に開示されているよう
に、真比重を1以下にしたものがある。この従来の多孔
質樹脂メディアは、同公報に記載されているように、
(20重量%〜50重量%の)不飽和ポリエステル樹脂
と(30重量%〜10重量%)の塩化ビニル樹脂とを混
合撹拌し、該混合物へ(49重量%〜30重量%の)シ
リカと(1重量%〜10重量%の)発泡スチロール樹脂
とを加えて混合撹拌後、鋳型し、200℃〜250℃で
乾燥し、脱型して成形体を得る方法によって造られてい
る。Conventionally, as a porous resin medium of this type, there is one having a true specific gravity of 1 or less, as disclosed in, for example, JP-A-60-242960. This conventional porous resin media, as described in the publication,
The unsaturated polyester resin (20 wt% to 50 wt%) and the vinyl chloride resin (30 wt% to 10 wt%) are mixed and stirred, and silica (49 wt% to 30 wt%) and ( (1% by weight to 10% by weight) Styrofoam resin is added, mixed and stirred, cast, dried at 200 ° C. to 250 ° C., and demolded to obtain a molded body.
しかしながら、従来の多孔質樹脂メディアの製造方法で
は、鋳型に金型あるいは樹脂型が使用されているため
に、鋳型面と接触するメディア表面及びその近傍での発
泡が抑制され、メディア表面の気孔率が著しく低くな
り、また、メディア表面が平滑化されるという問題があ
り、天然の軽石の表面の粗荒性及び多孔質性には遥かに
及ばないものしか得ることができなかった。However, in the conventional method for producing a porous resin media, since a mold or a resin mold is used for the mold, foaming on the media surface in contact with the mold surface and its vicinity is suppressed, and the porosity of the media surface is reduced. Has a problem that the media surface is remarkably lowered and the surface of the media is smoothed, so that only the surface roughness and porosity of the natural pumice stone can be obtained.
例えば、不飽和ポリエステル樹脂45重量%、塩化ビニ
ル樹脂15重量%、ケイ砂38重量%及び発泡スチロー
ル樹脂2重量パーセントを使用して上記の従来法によっ
て造られた発泡樹脂メディアは、真比重が1以下の多孔
質体にすることが可能ではあるが、その表面には孔径が
0.6mm程度よりも大きい気孔は見られず、若干の光沢
が観察される程度に平滑にできている。For example, a foamed resin medium produced by the above-mentioned conventional method using 45% by weight of unsaturated polyester resin, 15% by weight of vinyl chloride resin, 38% by weight of silica sand and 2% by weight of expanded polystyrene resin has a true specific gravity of 1 or less. Although it is possible to make a porous body, the surface of the porous body has no pores having a pore size larger than about 0.6 mm, and the surface is smooth to the extent that some gloss is observed.
本発明は、上記の事情を考慮してなされたものであっ
て、天然の軽石に勝るとも劣らない程度に粗荒な多孔質
の表面を有する多孔質樹脂メディアが得られる多孔質樹
脂メディアの製造方法及び多孔質樹脂メディア用鋳型を
提供することを目的とするものである。The present invention has been made in view of the above circumstances, and is a method for producing a porous resin medium having a porous resin medium having a porous surface that is rough enough not to be inferior to natural pumice stone. It is intended to provide a method and a mold for porous resin media.
本発明に係る多孔質樹脂メディアの製造方法は、上記の
目的を達成するために、基材樹脂と、重量比で基材樹脂
40〜90に対して10〜60の割合の研磨材と、重量
比で基材樹脂と研磨材との混合物100に対して1〜5
の割合の一次発泡ビーズと、重量比で基材樹脂100に
対して2.5〜5の割合の発泡剤とを混合撹拌した後、
別に前記一次発泡ビーズを発泡させた発泡樹脂で造られ
た鋳型に鋳入し、乾燥させることにより二次発泡成形体
を得ることを特徴としている。In order to achieve the above-mentioned object, the method for producing a porous resin media according to the present invention comprises a base resin, an abrasive in a weight ratio of 10 to 60 with respect to the base resins 40 to 90, and a weight. 1 to 5 relative to 100 of the mixture of base resin and abrasive in ratio
After mixing and stirring the primary expanded beads in a ratio of 5 and the foaming agent in a ratio of 2.5 to 5 with respect to the base resin 100 by weight,
Separately, the secondary expanded molded article is obtained by casting the primary expanded beads in a mold made of a foamed resin in which the expanded beads have been foamed and drying.
また、本発明に係る多孔質樹脂メディア用鋳型は、上記
の目的を達成するために、多孔質樹脂メディアの原料と
して使用される一次発泡ビーズを二次発泡させた発泡樹
脂で形成される。Further, the mold for porous resin media according to the present invention is formed of a foamed resin obtained by secondary foaming of primary expanded beads used as a raw material of the porous resin media in order to achieve the above object.
本発明に使用される基材樹脂は、特に制限されるもので
はなく、発泡樹脂の基材樹脂として一次発泡ビーズに対
応して通常に使用されるものであればよい。例えば、一
次発泡ビーズとして一次発泡スチロールビーズを選択す
る場合には、特に耐薬品性や耐アルカリ性等に優れ、し
かも、安価である不飽和ポリエステル樹脂を基材樹脂と
して使用することができる。The base resin used in the present invention is not particularly limited as long as it is a base resin of a foamed resin and is usually used corresponding to the primary foam beads. For example, when primary expanded polystyrene beads are selected as the primary expanded beads, an unsaturated polyester resin that is particularly excellent in chemical resistance, alkali resistance, etc. and is inexpensive can be used as the base resin.
本発明に使用される研磨材は、特に限定されることはな
く、アランダム、ホワイトアランダム、グリーンカーボ
ン、シリカ、パーライト、シラスバルーン等がその例と
して挙げられる。これらの研磨材の中では、鋳型内での
二次発泡反応時に基材樹脂の沈澱を防止し、製品を全体
にわたって均一に発泡させるために、特に比重の軽いパ
ーライトあるいはシラスバルーンを混入して使用するこ
とが好ましい。The abrasive used in the present invention is not particularly limited, and examples thereof include alundum, white alundum, green carbon, silica, pearlite, and shirasu balloon. Among these abrasives, perlite or shirasu balloon, which has a low specific gravity, is used to prevent the base resin from precipitating during the secondary foaming reaction in the mold and to uniformly foam the product. Preferably.
研磨材の配合割合は重量比で基材樹脂40〜90に対し
て10〜60とするのが好ましく、重量比で基材樹脂5
0〜80に対して20〜50の割合で配合することが、
特に優れた耐久性及びほぐし加工効率が得られるので一
層好ましい。研磨材の配合割合が重量比で基材樹脂90
に対して10を下回るとほぐし加工効率を高める効果が
きわめて弱くなり、基材樹脂40に対して60を上回る
と製品が脆弱になるので好ましくない。The compounding ratio of the abrasive is preferably 10 to 60 with respect to the base resin 40 to 90 by weight ratio, and the base resin 5 by weight ratio.
To be blended in a ratio of 20 to 50 with respect to 0 to 80,
Particularly excellent durability and disentangling efficiency can be obtained, which is more preferable. 90% base resin by weight
On the other hand, if it is less than 10, the effect of improving the loosening processing efficiency becomes extremely weak, and if it exceeds 60 with respect to the base resin 40, the product becomes fragile, which is not preferable.
研磨材の他に増量材を添加することは自由であるが、上
記の研磨材は増量材としての機能も有しているので、そ
の他に増量材を添加することは本発明に必順のことでは
ない。Although it is free to add an extender in addition to the abrasive, the above-mentioned abrasive also has a function as an extender, so addition of an extender to the other is indispensable to the present invention. is not.
本発明に使用される一次発泡ビーズとしては、特に制限
はなく、例えば、ポリスチレン、アクリルニトリル−ブ
タジエン−スチレン(ABS)、ポリエチレン、ポリプ
ロピレン、ポリ塩化ビニル(PVC)等の公知の一次発
泡ビーズを使用することが可能である。これらの一次発
泡ビーズの中では、特に、耐薬品性、耐アルカリ性等に
優れ、しかも、安価であり、取扱が容易なポリスチレン
からなる一次発泡スチロール樹脂を使用することが推奨
される。The primary expanded beads used in the present invention are not particularly limited, and for example, known primary expanded beads such as polystyrene, acrylonitrile-butadiene-styrene (ABS), polyethylene, polypropylene, polyvinyl chloride (PVC) are used. It is possible to Among these primary expanded beads, it is recommended to use a primary expanded polystyrene resin made of polystyrene, which is particularly excellent in chemical resistance, alkali resistance, etc., is inexpensive, and is easy to handle.
また、本発明に使用される一次発泡ビーズの粒径は特に
限定されないが、二次発泡反応を一層均一に進行させる
ために、粒径5mm以下のものを使用することが推奨され
る。The particle size of the primary expanded beads used in the present invention is not particularly limited, but it is recommended to use particles having a particle size of 5 mm or less in order to promote the secondary expansion reaction more uniformly.
一次発泡ビーズの配合割合は重量比で基材樹脂と研磨材
との合計重量100に対して1〜5の割合であることが
好ましい。基材樹脂と研磨材との合計重量100に対し
て1の割合を下回るときには気泡が少なくなり、また、
真比重が1以上となるので好ましくなく、基材樹脂と研
磨材との合計重量100に対して5を上回ると収縮率が
高くなり過ぎ、また、強度が著しく弱くなるので好まし
くない。The mixing ratio of the primary expanded beads is preferably 1 to 5 with respect to the total weight 100 of the base resin and the abrasive as a weight ratio. When the total weight of the base resin and the abrasive is less than 1 with respect to 100, air bubbles decrease, and
The true specific gravity is 1 or more, which is not preferable, and when the total weight of the base resin and the abrasive is more than 5, it is not preferable because the shrinkage ratio becomes too high and the strength becomes remarkably weak.
本発明に使用される発泡剤は、特に制限されず、一次発
泡ビーズに対応する公知の発泡剤を使用すればよい。ま
た、発泡剤とともに発泡助剤を使用することは妨げな
い。The foaming agent used in the present invention is not particularly limited, and a known foaming agent corresponding to the primary expanded beads may be used. Also, the use of foaming aids with foaming agents is not hindered.
発泡剤の添加量は重量比で基材樹脂100に対して2〜
5の割合であることが好ましい。発泡剤の添加量が重量
比で基材樹脂100に対して2をを下回ると発泡率が低
くなり過ぎるので好ましくなく、5を上回ると一次発泡
ビーズに対して発泡剤が過剰になり、強度が不足するう
え、価格的にも著しく高価になるので好ましくない。The amount of the foaming agent added is 2 to the base resin 100 in a weight ratio.
A ratio of 5 is preferable. If the amount of the foaming agent added is less than 2 based on the weight of the base resin 100, the foaming rate will be too low, and if it exceeds 5, the foaming agent will be excessive with respect to the primary foam beads and the strength will be increased. It is not preferable because it will be insufficient and the price will be significantly high.
尚、上記の基材樹脂、研磨材、一次発泡ビーズ、発泡剤
等の他に、基材樹脂を硬化させるための触媒(硬化剤)
が添加される。この触媒の添加量は、重量比で基材樹脂
100に対して1程度の割合とされる。In addition to the above-mentioned base resin, abrasive, primary expanded beads, foaming agent, etc., a catalyst (curing agent) for curing the base resin
Is added. The addition amount of this catalyst is about 1 with respect to the base resin 100 by weight.
本発明において、基材樹脂、研磨剤、一次発泡樹ビーズ
及び発泡剤との撹拌に要する時間は処理量にもよるが1
0〜数十秒程度で十分である。また、鋳型後の乾燥は室
温ないしは60℃で行えばよく、好ましくは30℃〜5
0℃で乾燥される。鋳型後の二次発泡及びこれに連続し
て行われる乾燥は鋳型後5〜10分で終了し、その後、
必要に応じて製品が鋳型から取り出される。製品の脱型
は、後述するように鋳型の全てが製品に取り込まれるよ
うな場合には不必要になるが、脱型が必要な場合には、
鋳型の残部と製品との分離が容易な間、即ち、二次発泡
反応が終了した後製品が完全に乾燥する前に行うことが
好ましい。In the present invention, the time required for stirring the base resin, the abrasive, the primary expanded resin beads, and the foaming agent depends on the treatment amount, but is 1
About 0 to several tens of seconds is sufficient. The drying after the casting may be carried out at room temperature or 60 ° C, preferably 30 ° C to 5 ° C.
Dry at 0 ° C. The secondary foaming after the mold and the drying which is continuously performed after the mold are completed 5 to 10 minutes after the mold, and thereafter,
The product is removed from the mold if necessary. Product demolding becomes unnecessary when all of the molds are incorporated into the product as described below, but when demolding is necessary,
It is preferable to perform it while the rest of the mold and the product are easily separated, that is, after the secondary foaming reaction is completed and before the product is completely dried.
また、本発明に係る多孔質樹脂メディア用鋳型は、上記
の目的と達成するために、多孔質樹脂メディアの原料と
して使用される一次発泡ビーズを二次発泡させた発泡樹
脂で形成され、例えば、一次発泡ビーズとして一次発泡
スチロールビーズが使用される場合には、これを二次発
泡成形した発泡スチロール樹脂で鋳型が形成される。Further, the mold for the porous resin media according to the present invention is formed of a foamed resin obtained by secondary foaming of the primary foam beads used as a raw material of the porous resin media in order to achieve the above object, and, for example, When the primary expanded polystyrene beads are used as the primary expanded beads, the mold is formed by the secondary expanded polystyrene foamed polystyrene resin.
鋳型を発泡樹脂で形成するということは鋳型全体を発泡
樹脂で成形することに限定されるものではなく、少なく
とも鋳型面からある程度の範囲内が発泡樹脂で形成され
ておれば良いのであって、例えば、従来の鋳型の鋳型面
に沿って所定の厚さの二次発泡樹脂層を形成したものも
本発明の含まれる。Forming the mold with the foamed resin is not limited to molding the entire mold with the foamed resin, as long as it is formed with the foamed resin at least within a certain range from the mold surface, for example, The present invention also includes a conventional mold in which a secondary foamed resin layer having a predetermined thickness is formed along the mold surface.
鋳型のキャビティの形状は特に限定されるものではな
く、例えば、砲弾形、円錐形、円錐台形等の回転体形で
あってもよく、5角錐形、6角錐形、8角錐形等の角錐
形であってもよく、直方形、立方形等の6面体形であっ
てもよい。The shape of the mold cavity is not particularly limited, and may be, for example, a rotating body shape such as a bullet shape, a conical shape, or a truncated cone shape, and a pyramidal shape such as a pentagonal pyramid, a hexagonal pyramid, or an octagonal pyramid. It may be a hexahedron such as a rectangular parallelepiped or a cube.
鋳型の肉厚は、鋳型後硬化が完了するまでの間に発泡剤
が鋳型を鋳型面から溶かす深さ以上に形成してあれば特
に限定されるものではない。従って、鋳型の溶解が比較
的生じ難いキャビティの横側法の肉厚は鋳型の溶解が生
じ易いキャビティ下方の肉厚よりも薄くすることができ
る。The wall thickness of the mold is not particularly limited as long as the foaming agent is formed to a depth equal to or more than the depth at which the mold melts from the mold surface by the time the post-mold curing is completed. Therefore, the wall thickness in the lateral method of the cavity in which the melting of the mold is relatively hard to occur can be made smaller than the thickness below the cavity in which the melting of the mold easily occurs.
〔作用〕 本発明によれば、鋳型後、基材樹脂と一次発泡ビーズと
発泡剤とが反応して更に発泡度が高められるが、このと
きに発泡剤の一部分が一次発泡ビーズを二次発泡させた
鋳型と反応して鋳型を溶かし、鋳型面の近傍でも中心部
と同様の発泡反応が生じる。[Operation] According to the present invention, after the mold, the base resin, the primary foam beads and the foaming agent react to further increase the degree of foaming. At this time, a part of the foaming agent secondary foams the primary foam beads. It reacts with the cast mold to melt the mold, and a foaming reaction similar to that in the central part occurs even near the mold surface.
このようにして得た多孔質樹脂メディアは表面から中心
部にいたるまでほぼ均一に発泡しており、その表面には
目視可能な1〜十数mmの孔径を有する独立気孔あるいは
連続気孔が多数開口され、表面に天然の軽石に優るとも
劣らない多孔質性と粗荒性とを備える多孔質樹脂メディ
アが得られた。The porous resin media obtained in this way is almost uniformly foamed from the surface to the center, and the surface has a large number of visible independent pores or continuous pores having a pore size of 1 to several tens of mm. As a result, a porous resin medium having a porosity and a roughness which are not inferior to natural pumice on the surface was obtained.
尚、鋳型は基材樹脂及び発泡剤との反応により少なくと
もその一部分が次第にメディアの中に取り込まれ、メデ
ィアの一部分を構成することになる。従って、一次発泡
ビーズ及び発泡剤の量に対して鋳型の発泡率及び肉厚を
適当に設定すれば、鋳型の全てをメディアに取り込むこ
とができ、使用後の鋳型の処分が不要になり、これに伴
う公害問題に煩わされずに済む。Incidentally, at least a part of the mold is gradually taken into the medium by the reaction with the base resin and the foaming agent, and constitutes a part of the medium. Therefore, if the foaming rate and wall thickness of the mold are appropriately set with respect to the amount of the primary foam beads and the foaming agent, the entire mold can be taken into the media, and the disposal of the mold after use becomes unnecessary. You do not have to worry about the pollution problems associated with.
基材樹脂としての不飽和ポリエステル樹脂と研磨剤とし
てのシリカ及びシラスバルーンを重量比で不飽和ポリエ
ステル樹脂50、シリカ40、シラスバルーン10の割
合で混合し、この混合物に一次発泡ビーズとしての一次
発泡スチロールビーズを重量比で上記混合物100に対
して2.5の割合で混合し、更に、発泡剤、発泡助剤及
び触媒を重量比で不飽和ポリエステル樹脂100に対し
て発泡剤2.5、発泡助剤2、触媒1の割合で混合した
後、約30秒間にわたって撹拌し、引き続いて発泡スチ
ロール製の鋳型に注入し、常温、常圧のもとで3〜5分
間にわたって二次発泡させた。この二次発泡及びこれに
連続して起こる硬化の反応過程において、注入された原
料混合物によって鋳型が鋳型面から次第に浸食されて行
くことが観察された。離型しても型崩れを生じない程度
に硬化したことを確認してから離型し、室内で約10分
間かけて乾燥させて多孔質樹脂メディアを得た。離型に
際しては、鋳造物と鋳型との強度が著しく異なるので、
鋳型を手で開くことにより簡単に離型することができ
た。また、離型後の鋳型の消耗は底壁で5〜10mm、側
壁で2〜3mmに達していることが分かった。乾燥に際し
ては特に加熱をしなかったが、加熱をすることによって
乾燥時間を短縮することは自由である。An unsaturated polyester resin as a base resin and silica and shirasu balloon as an abrasive are mixed in a weight ratio of unsaturated polyester resin 50, silica 40, and shirasu balloon 10, and this mixture is used as primary expanded polystyrene as primary expanded beads. The beads were mixed in a weight ratio of 2.5 with respect to 100 of the above mixture, and further, a foaming agent, a foaming aid and a catalyst were mixed in a weight ratio of 100 of the unsaturated polyester resin with 2.5 of the foaming agent. After mixing the agent 2 and the catalyst 1 in a ratio, the mixture was stirred for about 30 seconds, subsequently poured into a styrofoam mold, and secondarily foamed at room temperature and atmospheric pressure for 3 to 5 minutes. It was observed that the mold was gradually eroded from the mold surface by the injected raw material mixture in the reaction process of the secondary foaming and the curing that continuously occurred. After confirming that the resin was cured to such an extent that it did not lose its shape even after being released from the mold, the mold was released and dried in a room for about 10 minutes to obtain a porous resin medium. At the time of release, the strength of the casting and the mold are significantly different,
It was possible to easily release the mold by opening the mold by hand. It was also found that the mold consumption after releasing the mold reaches 5 to 10 mm on the bottom wall and 2 to 3 mm on the side wall. Although no particular heating was carried out during the drying, it is free to shorten the drying time by heating.
この多孔質樹脂メディアの表面を肉眼で観察したところ
2mm〜5mm程度の孔径を有する連続気孔あるいは独立気
孔が多数目視された。また、この多孔質樹脂メディアを
割ってその内部を観察したところ全体にわたって均一に
発泡していることが確認できた。When the surface of this porous resin medium was visually observed, a large number of continuous pores or independent pores having a pore diameter of about 2 mm to 5 mm were visually observed. Further, when this porous resin medium was broken and the inside thereof was observed, it was confirmed that the porous resin medium was uniformly foamed throughout.
上記の実施例では、多孔質樹脂メディアが鋳型を使用す
るバッチ成形方法によって作られているが、多数の鋳型
を容易して一次発泡ビーズ、発泡剤及び研磨材をライン
ミキサ、ニーダ等によって連続的に混合撹拌し、連続的
に鋳型する連続成形にも本発明は適用できる。また、一
次発泡ビーズ、発泡剤及び研磨材の混合物を成形ロール
間に供給して厚板状に成形するブロック成形法において
も、前記混合物の表面とロールとの間に発泡スチロール
シートを連続的に巻き込みながらロール成形することに
より、上記と同様に表面が十分に多孔質化されるととも
に粗荒化された多孔質樹脂ブロックを得ることができ、
このブロックを分割して多孔質樹脂メディアを得ること
もできる。In the above examples, the porous resin media is made by a batch molding method using a mold, but a large number of molds can be easily prepared and primary expanded beads, a foaming agent and an abrasive can be continuously added by a line mixer, a kneader or the like. The present invention can also be applied to continuous molding in which the mixture is mixed and stirred, and continuously cast. Further, also in the block molding method in which a mixture of primary expanded beads, a foaming agent and an abrasive is supplied between molding rolls to form a thick plate, a Styrofoam sheet is continuously wound between the surface of the mixture and the roll. While roll-forming, the surface can be sufficiently porous and roughened in the same manner as described above to obtain a roughened porous resin block,
It is also possible to obtain a porous resin medium by dividing this block.
〔発明の効果〕 以上のように、本発明によれば、鋳型内での二次発泡時
に基材樹脂及び発泡剤によって鋳型面が溶かされ、メデ
ィア表面をその中心部と同様に発泡させることができる
ので、表面が天然の軽石に勝るとも劣らない程度に多孔
質化され、かつ、粗荒面化された多孔質樹脂メディアを
得ることができる。[Advantages of the Invention] As described above, according to the present invention, the mold surface is melted by the base resin and the foaming agent during the secondary foaming in the mold, and the media surface can be foamed in the same manner as the central part. Therefore, it is possible to obtain a porous resin medium whose surface is made porous to a degree comparable to that of natural pumice and roughened.
また、本発明によれば、上記の従来例に比べて工程が簡
単であり、所要時間も短く、しかも、乾燥温度が格段に
低いので、容易に、かつ、安価に多孔質樹脂メディアを
得ることができる。Further, according to the present invention, the process is simpler than the above-mentioned conventional example, the required time is short, and the drying temperature is remarkably low, so that the porous resin medium can be obtained easily and inexpensively. You can
Claims (2)
に対して10〜60の割合の研磨材と、重量比で基材樹
脂と研磨材との混合物100に対して1〜5の割合の一
次発泡ビーズと、重量比で基材樹脂100に対して2.
5〜5の割合の発泡剤とを混合撹拌した後、別に前記一
次発泡ビーズを発泡させた発泡樹脂で造られた鋳型に鋳
入し、乾燥させることにより二次発泡成形体を得ること
を特徴とする多孔質樹脂メディアの製造方法。1. A base resin and base resins 40 to 90 in a weight ratio.
To the base resin 100 in a weight ratio, and an abrasive material in a ratio of 10 to 60, primary expanded beads in a ratio of 1 to 5 in a mixture 100 of the base resin and the abrasive material in a weight ratio. 2.
A secondary foamed molded product is obtained by mixing and stirring with a foaming agent in a ratio of 5 to 5, and then separately casting into a mold made of a foamed resin in which the primary expanded beads are foamed and drying. And a method for producing a porous resin media.
る一次発泡ビーズを二次発泡させた発泡樹脂で形成され
た多孔質樹脂メディア用鋳型。2. A mold for porous resin media, which is formed of a foamed resin obtained by secondary foaming of primary foam beads used as a raw material for a porous resin media.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63054473A JPH0622925B2 (en) | 1988-03-08 | 1988-03-08 | Porous resin media manufacturing method and porous resin media mold |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63054473A JPH0622925B2 (en) | 1988-03-08 | 1988-03-08 | Porous resin media manufacturing method and porous resin media mold |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01226324A JPH01226324A (en) | 1989-09-11 |
JPH0622925B2 true JPH0622925B2 (en) | 1994-03-30 |
Family
ID=12971641
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63054473A Expired - Lifetime JPH0622925B2 (en) | 1988-03-08 | 1988-03-08 | Porous resin media manufacturing method and porous resin media mold |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0622925B2 (en) |
-
1988
- 1988-03-08 JP JP63054473A patent/JPH0622925B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH01226324A (en) | 1989-09-11 |
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