JPH0929813A - Manufacture of ultra-high-molecular-weight polyethylene porous material - Google Patents
Manufacture of ultra-high-molecular-weight polyethylene porous materialInfo
- Publication number
- JPH0929813A JPH0929813A JP7181669A JP18166995A JPH0929813A JP H0929813 A JPH0929813 A JP H0929813A JP 7181669 A JP7181669 A JP 7181669A JP 18166995 A JP18166995 A JP 18166995A JP H0929813 A JPH0929813 A JP H0929813A
- Authority
- JP
- Japan
- Prior art keywords
- weight polyethylene
- ultra
- extruder
- molecular weight
- porous body
- 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
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、超高分子量ポリエ
チレン製多孔質体の製造方法に係り、特に多数の連続気
孔を有し、透過性及び耐薬品性に優れ、気体または液体
などの媒体から微細な塵埃・粒子などの物質を分離する
ための濾過フィルタ、反応過程または処理過程中の特定
関与物キャリア、曝気槽等用の散気管、地下水の浸透用
管あるいは排水用管等に好適に使用できる長尺の中空状
の超高分子量ポリエチレン製多孔質体の製造方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an ultra-high molecular weight polyethylene porous body, and in particular, it has a large number of continuous pores, is excellent in permeability and chemical resistance, and can be used in a medium such as gas or liquid. Suitable for use as a filtration filter for separating substances such as fine dust and particles, carrier for specific substances involved in the reaction process or treatment process, air diffuser pipe for aeration tank, groundwater infiltration pipe, drainage pipe, etc. The present invention relates to a method for producing a long hollow ultra-high molecular weight polyethylene porous body.
【０００２】[0002]
【従来の技術】従来より、各種の気体または液体などの
媒体から塵埃・粒子等の物質を分離するためのフィルタ
等の多孔質体は、超高分子量ポリエチレン樹脂単体、あ
るいはこれと他の樹脂例えば中分子量ポリエチレン樹脂
や高密度ポリエチレン樹脂とを混合してなる合成樹脂原
料を焼結成形して、断面が筒状等からなる中空状の多孔
質体とし、必要に応じて、その多孔質体の表面の気孔
に、非粘着性に優れた微粒子状の被着剤を被着したもの
が知られている。2. Description of the Related Art Conventionally, a porous material such as a filter for separating substances such as dust and particles from a medium such as various gases or liquids has been made of ultra-high molecular weight polyethylene resin alone or other resin such as A synthetic resin material obtained by mixing a medium-molecular-weight polyethylene resin or a high-density polyethylene resin is sintered and molded into a hollow porous body having a tubular cross section, etc. It is known that the pores on the surface are coated with a fine particle-shaped adherend having excellent non-adhesiveness.
【０００３】そして、このような多数の連続気孔を有す
る中空状の多孔質体を製造する方法として、上記の合成
樹脂原料を用い、オリフィスが配設されたラム押出機に
よりラム押出方法で連続的に焼結成形して得ることが提
案されている。As a method for producing such a hollow porous body having a large number of continuous pores, the above synthetic resin raw material is used, and a ram extruder provided with an orifice is used to continuously perform the ram extrusion method. It is proposed to obtain it by sinter molding.
【０００４】[0004]
【発明が解決しようとする課題】通常、ラム押出方法に
用いるラム押出機は、外周に単独ないし複数の加熱装置
を備えたシリンダー、そのシリンダーに内蔵した往復運
動をするピストン（プランジャーともいう）、シリンダ
ー端部の成形金型、及び、シリンダー内に連通した原料
供給部から構成され、シリンダー内の先端部には、オリ
フィスが配設してある。Generally, a ram extruder used in a ram extrusion method is a cylinder having a single or a plurality of heating devices on its outer circumference, and a reciprocating piston (also called a plunger) built in the cylinder. , A molding die at the end of the cylinder, and a raw material supply section communicating with the inside of the cylinder, and an orifice is provided at the tip of the inside of the cylinder.
【０００５】この成形方法は、原料供給部を通じてシリ
ンダー内に充填された超高分子量ポリエチレン樹脂等
を、シリンダー内で加熱しながらピストンの往復運動に
よって少なくともその一部を溶融状態として成形金型内
に送り込み、成形金型内で部分溶融個所を相互に融着し
て多数の連続気孔を有する中空状の多孔質体に焼結して
押出成形するものである。In this molding method, the ultrahigh molecular weight polyethylene resin or the like filled in the cylinder through the raw material supply section is heated in the cylinder and at least a part of the molten resin is melted by the reciprocating motion of the piston into the molding die. It is sent in, and the partially melted portions are fused to each other in a molding die and sintered into a hollow porous body having a large number of continuous pores for extrusion molding.
【０００６】しかしながら、上記ラム押出機を使用して
得られた超高分子量ポリエチレン製多孔質体では、押出
方向に対してほぼ垂直方向に輪状の周期的な模様がその
多孔質体の外表面に発生し易いという問題があった。即
ち、ラム押出機はピストンの往復運動によって周期的に
超高分子量ポリエチレン原料を押出機に押し込む機構で
あるため、その周期と対応して押出物が脈動し、押出方
向に対してほぼ垂直方向にピストンの往復運動の周期と
対応した輪状の模様が発生し易い。However, in the ultrahigh molecular weight polyethylene porous body obtained by using the ram extruder, a ring-shaped periodic pattern is formed on the outer surface of the porous body in a direction substantially perpendicular to the extrusion direction. There was a problem that it easily occurred. That is, since the ram extruder is a mechanism that periodically pushes the ultra-high molecular weight polyethylene raw material into the extruder by the reciprocating motion of the piston, the extrudate pulsates corresponding to the period, and the extrudate is almost perpendicular to the extrusion direction. A ring-shaped pattern corresponding to the cycle of the reciprocating motion of the piston is likely to occur.
【０００７】また、ラム押出機はピストンで原料を押出
機に押し込む機構であるため、押出機内を移動する溶融
した原料と押出機シリンダーとの間の抵抗が大きく、押
出すのに大きなエネルギーを必要とする上に、比較的低
い押出量しか得られず生産性に劣る傾向がある。Since the ram extruder is a mechanism for pushing the raw material into the extruder with a piston, the resistance between the molten raw material moving inside the extruder and the extruder cylinder is large, and a large amount of energy is required for extrusion. In addition, a relatively low extrusion rate is obtained, and the productivity tends to be poor.
【０００８】[0008]
【課題を解決するための手段】本発明は上記問題点を解
消できる超高分子量ポリエチレン製多孔質体の製造方法
を見出したものであり、その要旨とするところは、押出
機として異方向回転２軸押出機を用い、超高分子量ポリ
エチレンを押出機内の先端部に配設してあるオリフィス
から、少なくとも一部を溶融状態として、加熱温度１５
０℃〜３００℃の温度で通過させ、オリフィスに連設す
る成形金型内で部分溶融箇所を相互に融着して多数の連
続気孔を有する中空状の多孔質体を焼結して押出成形す
ることを特徴とする超高分子量ポリエチレン製多孔質体
の製造方法にある。DISCLOSURE OF THE INVENTION The present invention has found a method for producing a porous body made of ultra-high molecular weight polyethylene capable of solving the above problems. Using a screw extruder, at least a part of the ultrahigh molecular weight polyethylene is melted from an orifice provided at the tip of the extruder to a heating temperature of 15
Extrusion molding is performed by passing through at a temperature of 0 ° C to 300 ° C, fusing partially melting points to each other in a molding die continuous with an orifice, and sintering a hollow porous body having a large number of continuous pores. And a method for producing a porous body made of ultra-high molecular weight polyethylene.
【０００９】[0009]
【発明の実施の形態】本発明の製造方法では、超高分子
量ポリエチレン樹脂は、押出機内の先端部に配設してあ
るオリフィスを通過後若干膨脹して、ほぼ所望する最終
成形品に対応した形状をした気孔率の高い連続膨脹体と
なり、オリフィスを通過後直ちに成形金型内で膨脹体の
気孔がつぶされない程度の圧力で、所望する最終成形品
の形状に賦形するものである。BEST MODE FOR CARRYING OUT THE INVENTION According to the production method of the present invention, the ultra high molecular weight polyethylene resin slightly expands after passing through the orifice provided at the tip of the extruder, and corresponds to the almost desired final molded product. A continuous expanded body having a high porosity is formed and shaped into a desired final molded product with a pressure such that the pores of the expanded body are not crushed in the molding die immediately after passing through the orifice.
【００１０】押出機内の先端部に配設されるオリフィス
には、種々の形状のものが使用でき、例えば面板体に複
数の丸孔状の吐出口を設けたブレーカープレート状のオ
リフィスや、押出成形される多孔質体の断面形状とほぼ
同一形状の連続状あるいは非連続状の線状スリットの吐
出口を有するダイス状オリフィス等が使用できる。さら
に、上記の丸孔状の吐出口、または線状スリットの吐出
口の開口程度は、超高分子量ポリエチレン樹脂等の剪断
速度が１．０×１０1 〜５．０×１０5 ｓｅｃ-1となる
ように調整したものが好適に使用でき、嵩密度が０．８
０ｇ／ｃｍ3 以下の均質な多孔質体が得られやすい。The orifice provided at the tip of the extruder may have various shapes. For example, a breaker plate-shaped orifice having a plurality of round-hole-shaped discharge ports on a face plate, or an extrusion molding. A die-shaped orifice having a continuous or discontinuous linear slit discharge port having substantially the same cross-sectional shape as the porous body to be used can be used. Further, the opening degree of the round hole-shaped discharge port or the linear slit-shaped discharge port is such that the shear rate of the ultrahigh molecular weight polyethylene resin is 1.0 × 10 1 to 5.0 × 10 5 sec −1 . The ones adjusted to have a bulk density of 0.8 can be preferably used.
It is easy to obtain a homogeneous porous body having a content of 0 g / cm 3 or less.
【００１１】また、上記超高分子量ポリエチレン樹脂
に、溶融補助剤的に５重量部〜２０重量部の中分子量ポ
リエチレンや、多孔質体の気孔度と伸張率の調整剤的に
５重量部〜２０重量部の高・中・低密度ポリエチレン、
中高分子量ポリエチレン等を添加することができる。In addition, 5 to 20 parts by weight of a medium-molecular-weight polyethylene as a melting aid, or 5 to 20 parts by weight as a porosity and elongation adjusting agent of a porous body is added to the above ultrahigh molecular weight polyethylene resin. Parts of high, medium and low density polyethylene,
Medium and high molecular weight polyethylene and the like can be added.
【００１２】さらには、０．５重量部〜１０重量部、好
ましくは１．５重量部〜２．５重量部の導電性付与剤、
０．５重量部〜１０重量部、好ましくは５重量部以下の
滑剤、０．００３重量部〜０．３重量部、好ましくは
０．０１重量部〜０．１５重量部の有機過酸化物等を添
加することもできる。Further, 0.5 to 10 parts by weight, preferably 1.5 to 2.5 parts by weight of a conductivity-imparting agent,
0.5 to 10 parts by weight, preferably 5 parts by weight or less of lubricant, 0.003 to 0.3 parts by weight, preferably 0.01 to 0.15 parts by weight of organic peroxide, etc. Can also be added.
【００１３】上記導電性付与剤としては、ケッチェンブ
ラック、チャンネルブラック、ファーネスブラック、サ
ーマルブラック、アセチレンブラックなどの導電性カー
ボンブラックや金属粉、金属酸化物等であり、上記滑剤
としては、モンタン酸エステル系のワックス、脂肪酸誘
導体のワックス等であり、そして上記有機過酸化物とし
ては、２，５−ジメチル−２，５−（ｔ−ブチルパーオ
キシ）ヘキサン、ジクミルパーオキサイド等が使用でき
る。Examples of the conductivity-imparting agent include conductive carbon black such as Ketjen black, channel black, furnace black, thermal black, and acetylene black, metal powder, and metal oxide, and the lubricant is montanic acid. The wax may be an ester wax, a wax of a fatty acid derivative, or the like, and 2,5-dimethyl-2,5- (t-butylperoxy) hexane, dicumyl peroxide, or the like may be used as the organic peroxide.
【００１４】本発明で使用する異方向回転２軸押出機に
は、通常のパラレル及びコニカル押出機が使用でき、前
述したように先端部にオリフィスが配設され、外周に加
熱装置を備えたシリンダーと、そのシリンダー端部の成
形金型と、シリンダー内に連通した原料供給部及びスク
リューとで構成されたものである。A normal parallel and conical extruder can be used for the counter-rotating twin-screw extruder used in the present invention. As described above, the cylinder is provided with an orifice at the tip and a heating device on the outer periphery. And a molding die at the end of the cylinder, a raw material supply section and a screw that communicate with each other in the cylinder.
【００１５】シリンダーの加熱温度は、超高分子量ポリ
エチレン樹脂等の原料が１５０℃〜３００℃になるよう
に温度調節されるものである。この加熱温度が１５０℃
未満では、樹脂が融着に必要な溶融状態にならず、３０
０℃を越えると樹脂が熱分解するという問題がある。The heating temperature of the cylinder is adjusted so that the raw material such as the ultrahigh molecular weight polyethylene resin has a temperature of 150 ° C to 300 ° C. This heating temperature is 150 ℃
If it is less than 30, the resin will not be in a molten state necessary for fusion,
If the temperature exceeds 0 ° C, there is a problem that the resin is thermally decomposed.
【００１６】シリンダー端部の成形金型の形状は、押出
成形される中空状の焼結多孔質体の断面形状とほぼ同一
形状であり、円筒形、角筒形、楕円形、長方形、星形
等、その用途によって適宜選択される。The shape of the molding die at the end of the cylinder is almost the same as the cross-sectional shape of the hollow sintered porous body to be extruded and is cylindrical, rectangular, elliptical, rectangular, star-shaped. Etc. are appropriately selected depending on the application.
【００１７】以下、本発明を実施例により説明する。The present invention will be described below with reference to examples.
【００１８】[0018]
実施例１ 粘度平均分子量３３０×１０4 、平均粒径１６０μｍ、
嵩比重０．４４９の超高分子量ポリエチレン樹脂を、複
数の丸孔の吐出口を設けたブレーカープレート（孔形
状：１．０ｍｍφ×５．０ｍｍＬ、孔個数：７２）及び
円筒状の成形金型を付設した、口径２０ｍｍの異方向回
転２軸押出機を用いシリンダー温度２００℃、成形金型
温度２００℃に設定し、外径６０ｍｍ、内径５３ｍｍ、
肉厚３．５ｍｍのパイプ状多孔質体を押出成形した。Example 1 Viscosity average molecular weight 330 × 10 4 , average particle size 160 μm,
A breaker plate (hole shape: 1.0 mm φ × 5.0 mm L, number of holes: 72) and a cylindrical molding die, which are made of ultra-high molecular weight polyethylene resin with a bulk specific gravity of 0.449, are provided with a plurality of round hole discharge ports. Using an attached twin-screw extruder with different diameters of 20 mm, the cylinder temperature was set to 200 ° C and the mold temperature was set to 200 ° C, the outer diameter was 60 mm, the inner diameter was 53 mm,
A pipe-shaped porous body having a wall thickness of 3.5 mm was extruded.
【００１９】実施例２ 粘度平均分子量６００×１０4 、平均粒径１８７μｍ、
嵩比重０．３７７の超高分子量ポリエチレン樹脂を、上
記実施例１と同様の異方向回転２軸押出機及び押出条件
で、実施例１と同一形状のパイプ状多孔質体を押出成形
した。Example 2 Viscosity average molecular weight 600 × 10 4 , average particle size 187 μm,
An ultra-high molecular weight polyethylene resin having a bulk specific gravity of 0.377 was extruded into a pipe-shaped porous body having the same shape as in Example 1 by using the same counter-rotating twin-screw extruder and extrusion conditions as in Example 1 above.
【００２０】実施例３ 粘度平均分子量３３０×１０4 、平均粒径３３５μｍ、
嵩比重０．４５８の超高分子量ポリエチレン樹脂を、上
記実施例１と同様の異方向回転２軸押出機及び押出条件
で、実施例１と同一形状のパイプ状多孔質体を押出成形
した。Example 3 Viscosity average molecular weight 330 × 10 4 , average particle size 335 μm,
An ultrahigh molecular weight polyethylene resin having a bulk specific gravity of 0.458 was extruded into a pipe-shaped porous body having the same shape as in Example 1 by using the same counter-rotating twin-screw extruder and extrusion conditions as in Example 1 above.
【００２１】実施例４ 粘度平均分子量３３０×１０4 、平均粒径１６０μｍ、
嵩比重０．４４９の超高分子量ポリエチレン樹脂を、複
数の丸孔の吐出口を設けたブレーカープレート（孔形
状：１．０ｍｍφ×５．０ｍｍＬ、孔個数：７２）及び
円筒状の成形金型を付設した、口径４７ｍｍの異方向回
転２軸押出機を用いシリンダー温度２００℃、成形金型
温度２００℃に設定し、実施例１と同一形状のパイプ状
多孔質体を押出成形した。Example 4 Viscosity average molecular weight 330 × 10 4 , average particle size 160 μm,
A breaker plate (hole shape: 1.0 mm φ × 5.0 mm L, number of holes: 72) and a cylindrical molding die, which are made of ultra-high molecular weight polyethylene resin with a bulk specific gravity of 0.449, are provided with a plurality of round hole discharge ports. A cylinder temperature of 200 ° C. and a molding die temperature of 200 ° C. were set by using an attached twin-screw extruder with different diameters of 47 mm, and a pipe-shaped porous body having the same shape as in Example 1 was extrusion-molded.
【００２２】実施例５ 粘度平均分子量６００×１０4 、平均粒径１８７μｍ、
嵩比重０．３７７の超高分子量ポリエチレン樹脂を、上
記実施例４と同様の異方向回転２軸押出機及び押出条件
で、実施例１と同一形状のパイプ状多孔質体を押出成形
した。Example 5 Viscosity average molecular weight 600 × 10 4 , average particle size 187 μm,
An ultra-high molecular weight polyethylene resin having a bulk specific gravity of 0.377 was extruded into a pipe-shaped porous body having the same shape as that of Example 1 by using the same counter-rotating twin-screw extruder and extrusion conditions similar to those of Example 4 above.
【００２３】実施例６ 粘度平均分子量５８０×１０4 、平均粒径３７０μｍ、
嵩比重０．４２７の超高分子量ポリエチレン樹脂を、線
状スリットの吐出口を設けたブレーカープレート（線状
スリットの形状：外径５７．５ｍｍ、内径５５．５ｍ
ｍ、スリット幅１．０ｍｍ）を用い、実施例１と同様の
異方向回転２軸押出機及び押出条件で、実施例１と同一
形状のパイプ状多孔質体を押出成形した。Example 6 Viscosity average molecular weight 580 × 10 4 , average particle size 370 μm,
A breaker plate with a linear slit discharge port (bulk plate shape: outer diameter 57.5 mm, inner diameter 55.5 m)
m, slit width 1.0 mm), a pipe-shaped porous body having the same shape as in Example 1 was extrusion-molded under the same different-direction rotating twin-screw extruder and extrusion conditions as in Example 1.
【００２４】比較例１ 粘度平均分子量３３０×１０4 、平均粒径１６０μｍ、
嵩比重０．４４９の超高分子量ポリエチレン樹脂を、ブ
レーカープレート（１．０ｍｍφ×５．０ｍｍＬ、孔個
数：７２）及び円筒状の成形金型を付設した、口径４０
ｍｍのラム押出機を用いシリンダー温度２００℃、成形
金型温度２００℃に設定し、実施例１と同一形状のパイ
プ状多孔質体を押出成形した。Comparative Example 1 Viscosity average molecular weight 330 × 10 4 , average particle size 160 μm,
An ultra high molecular weight polyethylene resin having a bulk specific gravity of 0.449 was attached to a breaker plate (1.0 mmφ × 5.0 mmL, the number of holes: 72) and a cylindrical molding die, and the diameter was 40.
Using a mm ram extruder, the cylinder temperature was set to 200 ° C. and the molding die temperature was set to 200 ° C. to extrude a pipe-shaped porous body having the same shape as in Example 1.
【００２５】比較例２ 粘度平均分子量６００×１０4 、平均粒径１８７μｍ、
嵩比重０．３７７の超高分子量ポリエチレン樹脂を、上
記比較例１と同様のラム押出機及び押出条件で、実施例
１と同一形状のパイプ状多孔質体を押出成形した。Comparative Example 2 Viscosity average molecular weight 600 × 10 4 , average particle size 187 μm,
An ultrahigh molecular weight polyethylene resin having a bulk specific gravity of 0.377 was extruded into a pipe-shaped porous body having the same shape as in Example 1 by using the same ram extruder and extrusion conditions as in Comparative Example 1 above.
【００２６】比較例３ 粘度平均分子量３３０×１０4 、平均粒径３３５μｍ、
嵩比重０．４５８の超高分子量ポリエチレン樹脂を、上
記比較例１と同様のラム押出機及び押出条件で、実施例
１と同一形状のパイプ状多孔質体を押出成形した。Comparative Example 3 Viscosity average molecular weight 330 × 10 4 , average particle size 335 μm,
An ultrahigh molecular weight polyethylene resin having a bulk specific gravity of 0.458 was extruded into a pipe-shaped porous body having the same shape as in Example 1 by using the same ram extruder and extrusion conditions as in Comparative Example 1 above.
【００２７】上記実施例１〜６及び比較例１〜３の押出
特性及び得られた多孔質体について測定した嵩比重を表
１に示した。ここで比電力は押出時の消費電力／押出量
の数値である。Table 1 shows the extrusion characteristics of Examples 1 to 6 and Comparative Examples 1 to 3 and the bulk specific gravity measured for the obtained porous bodies. Here, the specific power is a numerical value of power consumption / extrusion amount during extrusion.
【００２８】[0028]
【表１】 [Table 1]
【００２９】実施例１〜６では、何れも高い押出量及び
比電力が低く、生産性に優れており、また外表面に輪状
の模様のない多孔質体が得られた。これに対し比較例１
〜３では低い押出量と比電力が高く、生産性に劣り、ま
た得られた多孔質体の外表面に輪状の模様が発生し、外
観は不良であった。In each of Examples 1 to 6, a high extrusion rate and a low specific electric power, excellent productivity, and a porous body having no ring-shaped pattern on the outer surface were obtained. In contrast, Comparative Example 1
In Nos. 3 to 3, low extrusion rate and high specific electric power, poor productivity, and a ring-shaped pattern formed on the outer surface of the obtained porous body, resulting in poor appearance.
【００３０】[0030]
【発明の効果】上述したように本発明の製造方法によれ
ば、生産性に優れており、また多孔質体の外表面に輪状
の模様が発生しない、外観に優れた超高分子量ポリエチ
レン製多孔質体が得られるという利点を有している。Industrial Applicability As described above, according to the production method of the present invention, the porous material made of ultra-high molecular weight polyethylene has excellent productivity and does not have a ring-shaped pattern on the outer surface of the porous body and has an excellent appearance. It has the advantage that a body can be obtained.
Claims (1)
成形する超高分子量ポリエチレン製多孔質体の製造方法
において、押出機として異方向回転２軸押出機を用い、
超高分子量ポリエチレンを押出機内の先端部に配設して
あるオリフィスから、少なくとも一部を溶融状態とし
て、加熱温度１５０℃〜３００℃の温度で通過させ、オ
リフィスに連設する成形金型内で部分溶融箇所を相互に
融着して多数の連続気孔を有する中空状の多孔質体を焼
結して押出成形することを特徴とする超高分子量ポリエ
チレン製多孔質体の製造方法。1. A method for producing a porous body made of ultra-high molecular weight polyethylene, which comprises extrusion-molding ultra-high molecular weight polyethylene with an extruder, wherein a twin-screw extruder in different directions is used as the extruder,
At least a part of the ultrahigh molecular weight polyethylene is melted from an orifice provided at the tip of the extruder, and the ultrahigh molecular weight polyethylene is passed at a heating temperature of 150 ° C to 300 ° C in a molding die continuously connected to the orifice. A method for producing a porous body made of ultra-high molecular weight polyethylene, characterized in that the partially melted portions are mutually fused and a hollow porous body having a large number of continuous pores is sintered and extrusion-molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18166995A JP3559109B2 (en) | 1995-07-18 | 1995-07-18 | Method for producing porous body made of ultra-high molecular weight polyethylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18166995A JP3559109B2 (en) | 1995-07-18 | 1995-07-18 | Method for producing porous body made of ultra-high molecular weight polyethylene |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0929813A true JPH0929813A (en) | 1997-02-04 |
| JP3559109B2 JP3559109B2 (en) | 2004-08-25 |
Family
ID=16104803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18166995A Expired - Lifetime JP3559109B2 (en) | 1995-07-18 | 1995-07-18 | Method for producing porous body made of ultra-high molecular weight polyethylene |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3559109B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020020172A (en) * | 2018-08-01 | 2020-02-06 | 積水化学工業株式会社 | Drain pipe and rainwater drain device |
| CN111905836A (en) * | 2020-08-14 | 2020-11-10 | 上海组波智能仪器科技有限公司 | Porous plastic chemical reagent carrier and preparation method and application thereof |
-
1995
- 1995-07-18 JP JP18166995A patent/JP3559109B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020020172A (en) * | 2018-08-01 | 2020-02-06 | 積水化学工業株式会社 | Drain pipe and rainwater drain device |
| CN111905836A (en) * | 2020-08-14 | 2020-11-10 | 上海组波智能仪器科技有限公司 | Porous plastic chemical reagent carrier and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3559109B2 (en) | 2004-08-25 |
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