JPH0781014A - Manufacturing method of ultra high molecular weight polyethylene composite plate - Google Patents
Manufacturing method of ultra high molecular weight polyethylene composite plateInfo
- Publication number
- JPH0781014A JPH0781014A JP5231593A JP23159393A JPH0781014A JP H0781014 A JPH0781014 A JP H0781014A JP 5231593 A JP5231593 A JP 5231593A JP 23159393 A JP23159393 A JP 23159393A JP H0781014 A JPH0781014 A JP H0781014A
- Authority
- JP
- Japan
- Prior art keywords
- weight polyethylene
- molecular weight
- high molecular
- composite plate
- sheet
- 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.)
- Withdrawn
Links
Landscapes
- Laminated Bodies (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
(57)【要約】
【目的】 搬送コンベヤ・ラインおよびホッパー等の内
張り用ライニング材として有用な表面滑性にすぐれた超
高分子量ポリエチレン複合板の製造方法を提供する。通
気性を有する超高分子量ポリエチレン配合物粉末の予成
形シートを使用して、パンチングメタルシート等の芯材
と超高分子量ポリエチレンシートとの積層面に、エアか
み（空気の入り込み）現象が生じるのを防止し、外観が
非常にきれいで、複合板全体としての膨脹係数が抑えら
れて、熱による膨らみや剥がれが生じ難い、寸法精度に
すぐれた超高分子量ポリエチレン複合板を製造する。
【構成】 開孔率１０〜８０％を有するパンチングメタ
ルシート等の硬質有孔板よりなる芯材１と、表面を焼結
させた超高分子量ポリエチレン配合物粉末よりつくられ
た予成形シート３とを積層し、これらを加圧、加熱し
て、一体化し、超高分子量ポリエチレン複合板を製造す
る。
(57) [Summary] [Object] To provide a method for producing an ultra-high molecular weight polyethylene composite plate having excellent surface smoothness, which is useful as a lining material for a conveyor line, a hopper, and the like. Using a preformed sheet of breathable ultra high molecular weight polyethylene compound powder, air entrapment (air entrapment) phenomenon occurs on the laminated surface of the core material such as punching metal sheet and the ultra high molecular weight polyethylene sheet. To produce a super-high-molecular-weight polyethylene composite plate which is excellent in dimensional accuracy and has a very beautiful appearance, a coefficient of expansion of the composite plate as a whole is suppressed, and bulging and peeling due to heat hardly occur. A core material 1 made of a hard perforated plate such as a punching metal sheet having a porosity of 10 to 80%, and a preformed sheet 3 made of an ultra-high molecular weight polyethylene compound powder whose surface is sintered. Are laminated, and these are pressurized and heated to be integrated to produce an ultrahigh molecular weight polyethylene composite plate.
Description
【０００１】[0001]
【産業上の利用分野】この発明は、例えば搬送コンベヤ
・ライン、あるいはこのラインに備えられたホッパー等
の内張り用ライニング材として有用な超高分子量ポリエ
チレン複合板の製造法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an ultra-high molecular weight polyethylene composite sheet useful as a lining material for a conveyor line or a hopper provided in the line.
【０００２】この明細書において、超高分子量ポリエチ
レンとは、分子量が粘度法で測定して、約５０万以上、
光散乱法で測定して２００万以上を有するポリエチレン
をいうものとする。[0002] In this specification, ultrahigh molecular weight polyethylene has a molecular weight of about 500,000 or more as measured by a viscosity method.
It means polyethylene having 2 million or more as measured by a light scattering method.
【０００３】[0003]
【従来の技術】従来、超高分子量ポリエチレンのシート
は、そのすぐれた耐摩耗特性や、非付着性などの特徴を
生かし、各種粉粒体の搬送コンベヤ・ラインおよび貯蔵
コンベヤ・ライン、あるいはこれらのラインに備えられ
たホッパー、シュート、およびバンカー等の内張り用ラ
イニング材として使用され、被搬送粉粒体の内面付着や
ブリッジ現象等のトラブルの発生の防止、あるいはまた
耐摩耗性の向上が図られてきた。2. Description of the Related Art Conventionally, ultra-high molecular weight polyethylene sheets have been utilized for their excellent wear resistance and non-adhesiveness, and have been used for conveying and storing conveyor lines for various powders or storage conveyor lines or for these. It is used as a lining material for hoppers, chutes, bunkers, etc. provided in the line to prevent the occurrence of troubles such as adhesion of the inner surface of the conveyed granular material and the bridging phenomenon, or to improve wear resistance. Came.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
超高分子量ポリエチレン単体のシートよりなる内張り用
ライニング材は、線膨脹係数が非常に大きいものであ
り、このためボルト止めなどによる施工後、ライニング
材に、粉粒体移送時の摩擦熱などによる膨らみや剥がれ
が生じ、また機械的強度も低いという問題があった。However, the conventional lining material made of a sheet of ultra-high molecular weight polyethylene alone has a very large coefficient of linear expansion. Therefore, the lining material after bolting or the like is used. In addition, there is a problem that swelling and peeling occur due to frictional heat during transfer of powder and granules, and mechanical strength is low.
【０００５】そこで、従来は、ボルト取付穴の大きさや
位置を工夫したり、シートギャップを設けるなどによ
り、対処してきたが、根本的な問題解決策とはならず、
とくにシートの膨脹を考慮して、シートギャップを大き
くとると、被搬送粉粒体の一部がシートギャップに入り
込んで、居着するという問題があった。Therefore, in the past, measures have been taken by devising the size and position of the bolt mounting hole, or by providing a seat gap, but this is not a fundamental solution to the problem.
In particular, if the sheet gap is made large in consideration of the expansion of the sheet, there is a problem that a part of the conveyed powder and granular material enters the sheet gap and becomes occupied.
【０００６】なお従来、金属板の両面に、超高分子量ポ
リエチレンシートを接着剤層を介して接合することも行
なわれたが、これでは、特殊な接着作業を必要とする
し、接着強度が不足して、シートが剥がれやすいという
問題があった。Conventionally, it has been practiced to bond an ultra-high molecular weight polyethylene sheet to both sides of a metal plate via an adhesive layer, but this requires a special bonding work and the bonding strength is insufficient. Then, there was a problem that the sheet was easily peeled off.
【０００７】この発明の目的は、上記の従来技術の問題
を解決し、パンチングメタルシート等の硬質有孔板より
なる芯材を用いて、超高分子量ポリエチレンシートとの
複合板とし、しかも複合板全体としての膨脹係数を抑え
ることができて、熱による膨脹、収縮が小さくてすみ、
従って膨らみや剥がれが生じ難く、寸法精度にすぐれて
おり、さらに表面滑性にすぐれていて、内張り用ライニ
ング材として使用したさい、被搬送粉粒体の内面付着や
ブリッジ現象等のトラブルの発生を有効に防止し得ると
ともに、耐摩耗性にすぐれ、かつ機械的強度が非常に大
きい超高分子量ポリエチレン複合板の製造法を提供しよ
うとするにある。An object of the present invention is to solve the above-mentioned problems of the prior art and to form a composite plate with an ultra high molecular weight polyethylene sheet by using a core material made of a hard perforated plate such as a punching metal sheet, and the like. The expansion coefficient as a whole can be suppressed, and expansion and contraction due to heat can be small,
Therefore, it does not easily bulge or peel off, has excellent dimensional accuracy, and has excellent surface lubricity, and when used as a lining material for lining, it does not cause troubles such as adhesion on the inner surface of the granular material to be transported or bridge phenomenon. It is an object of the present invention to provide a method for producing an ultra high molecular weight polyethylene composite plate which can be effectively prevented, has excellent wear resistance, and has extremely high mechanical strength.
【０００８】[0008]
【課題を解決するための手段】この発明は、上記の目的
を達成するために、開孔率１０〜８０％を有する硬質有
孔板よりなる芯材の両面に、表面を焼結させた超高分子
量ポリエチレン配合物粉末よりつくられた少なくとも１
枚の予成形シートをそれぞれ積層し、これらを加圧、加
熱して、一体化し、超高分子量ポリエチレン複合板を得
ることを特徴とする、超高分子量ポリエチレン複合板の
製造法を要旨としている。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a core material made of a hard perforated plate having a porosity of 10 to 80% and having a surface sintered on both sides. At least one made from a high molecular weight polyethylene blend powder
The gist is a method for producing an ultra-high molecular weight polyethylene composite plate, which is characterized in that a plurality of pre-formed sheets are laminated, and these are pressed and heated to be integrated to obtain an ultra-high molecular weight polyethylene composite plate.
【０００９】上記において、硬質有孔板よりなる芯材と
しては、通常、アルミニウム（アルミニウム合金を含
む）製、ステンレス鋼もしくは鉄製、その他の金属製の
パンチングメタルシートを使用するが、これはその他、
不飽和ポリエステル樹脂、エポキシ樹脂、エポキシアク
リレート樹脂、フェノール樹脂のような熱硬化性樹脂な
どよりなるものであっても良い。In the above, as the core material made of a hard perforated plate, a punching metal sheet made of aluminum (including aluminum alloy), stainless steel or iron, or other metal is usually used.
It may be made of unsaturated polyester resin, epoxy resin, epoxy acrylate resin, thermosetting resin such as phenol resin, or the like.
【００１０】また、芯材の厚みは、とくに制限はない
が、通常１〜３mm程度である。The thickness of the core material is not particularly limited, but is usually about 1 to 3 mm.
【００１１】ここで、芯材の開孔率は１０〜８０％、好
ましくは１５〜３０％であるが、開孔率が１０％未満で
あれば、パンチングメタルシート等の硬質有孔板よりな
る芯材と、これの両面の超高分子量ポリエチレンシート
との積層性すなわち積層接合性が劣るので、好ましくな
い。また芯材の開孔率が８０％を越えると、超高分子量
ポリエチレンの量が多すぎて、複合板全体としての線膨
脹係数が増大して、シートの膨らみや剥がれが生じ、あ
るいはまた機械的強度も低下するので、好ましくない。The porosity of the core material is 10 to 80%, preferably 15 to 30%. However, if the porosity is less than 10%, the core material is a hard perforated plate such as a punching metal sheet. The core material and the ultra-high molecular weight polyethylene sheets on both sides of the core material are inferior in lamination property, that is, lamination bondability, and thus it is not preferable. If the porosity of the core material exceeds 80%, the amount of ultra-high molecular weight polyethylene is too large and the linear expansion coefficient of the composite plate as a whole increases, causing swelling or peeling of the sheet, or mechanical failure. The strength is also reduced, which is not preferable.
【００１２】また、パンチングメタルシート等の硬質有
孔板よりなる芯材にあけられる孔の大きさは、通常２〜
１５mm、好ましくは３〜１０mmである。孔の配列は、い
わゆる千鳥状配列、碁盤目状配列およびランダム配列の
いずれでも良いが、千鳥状配列であるのが、好ましい。The size of the holes formed in the core material made of a hard perforated plate such as a punching metal sheet is usually 2 to.
It is 15 mm, preferably 3 to 10 mm. The holes may be arranged in any of a so-called staggered arrangement, a checkerboard arrangement and a random arrangement, but a zigzag arrangement is preferable.
【００１３】芯材にあけられる孔の大きさが２mm未満で
あれば、熱プレスによる積層一体化成形のさい、超高分
子量ポリエチレン溶融物が芯材の孔に入り込みにくく、
接合不良を生じるので、好ましくない。また芯材にあけ
られる孔の大きさが１５mmを越えると、超高分子量ポリ
エチレンの性質が出すぎて、複合板全体としての線膨脹
係数が増大し、シートに膨らみや剥がれが生じやすくな
るので、好ましくない。If the size of the holes formed in the core material is less than 2 mm, it is difficult for the ultra-high molecular weight polyethylene melt to enter into the holes of the core material during lamination integral molding by hot pressing.
It is not preferable because it may cause poor bonding. If the size of the holes formed in the core material exceeds 15 mm, the properties of ultra-high molecular weight polyethylene become too high, and the linear expansion coefficient of the composite plate as a whole increases, so that the sheet tends to swell or peel off. Not preferable.
【００１４】また、表面を焼結させた超高分子量ポリエ
チレン配合物粉末の予成形シートはつぎのようにして製
造する。なお、この予成形シートについては、本出願人
が先に提案した特公平１−２６３２５号公報に詳しく記
載されている。A preformed sheet of the surface-sintered ultra-high molecular weight polyethylene compound powder is manufactured as follows. The preformed sheet is described in detail in Japanese Patent Publication No. 1-263325 previously proposed by the present applicant.
【００１５】予成形シートは、超高分子量ポリエチレン
の配合物の粉末を、５kg／cm2 以上の圧力下に１４０℃
以上の温度で加熱加圧して、表面部分が焼結した予成形
品を得、これを加圧下に常温まで冷却する。The preformed sheet was prepared by mixing powder of an ultra high molecular weight polyethylene powder at 140 ° C. under a pressure of 5 kg / cm 2 or more.
By heating and pressurizing at the above temperature, a preformed product whose surface portion is sintered is obtained, and this is cooled to normal temperature under pressure.
【００１６】ここで、超高分子量ポリエチレンの配合物
には、ガラス繊維、炭素繊維、ガラスビーズ、グラファ
イト、モリブデンパウダー、カーボンブラック等の無機
系充填材が含まれていても良い。Here, the ultrahigh molecular weight polyethylene compound may contain an inorganic filler such as glass fiber, carbon fiber, glass beads, graphite, molybdenum powder or carbon black.
【００１７】上記予成形シートの製造において、超高分
子量ポリエチレンの配合物粉末の成形圧力が５kg／cm2
未満であれば、予成形シートの密度が低すぎて伝熱性が
乏しく予成形シートが壊れるおそれがあるので、好まし
くない。また設備費等を考慮すると、成形圧力は５〜５
０kg／cm2 程度とするのが好ましい。In the production of the above preformed sheet, the molding pressure of the compound powder of ultra high molecular weight polyethylene is 5 kg / cm 2
If it is less than the above range, the density of the preformed sheet is too low, the heat conductivity is poor, and the preformed sheet may be broken, which is not preferable. Also, considering the equipment cost, the molding pressure is 5-5.
It is preferably about 0 kg / cm 2 .
【００１８】また超高分子量ポリエチレンの配合物粉末
の成形温度は、１４０℃未満であれば、焼結が生じない
ので、好ましくない。ただし、温度が高すぎると、樹脂
の低分子化をきたすので、１４０〜１６０℃であるが、
好ましい。Further, if the molding temperature of the blended powder of ultrahigh molecular weight polyethylene is less than 140 ° C., sintering will not occur, which is not preferable. However, if the temperature is too high, the molecular weight of the resin is lowered, so it is 140 to 160 ° C.,
preferable.
【００１９】表面を焼結させた超高分子量ポリエチレン
配合物粉末の予成形シートは、クラックや割れのない崩
壊しにくいものであって、取扱い、運搬、および積重ね
等が容易である。The preformed sheet of the ultra-high molecular weight polyethylene compound powder whose surface is sintered is not easily broken without cracks or cracks, and is easy to handle, transport, and stack.
【００２０】また、表面を焼結させた超高分子量ポリエ
チレン配合物粉末の予成形シートは、１枚だけでなく、
２枚以上重ねて使用しても良い。Further, the preformed sheet of the ultra-high molecular weight polyethylene compound powder whose surface is sintered is not limited to one sheet,
You may use it by stacking two or more sheets.
【００２１】予成形シートの厚みは、通常１〜５mm程度
である。The thickness of the preformed sheet is usually about 1 to 5 mm.
【００２２】上記超高分子量ポリエチレン複合板の製造
条件は、プレス温度１４０〜２００℃、好ましくは１６
０〜１７０℃であり、圧力は５〜５０kg／cm2 、好まし
くは２０〜３０kg／cm2 である。またプレス時間は、超
高分子量ポリエチレン配合物を溶融可塑化して、表面が
平坦な複合板に成形するのに充分な時間であり、これは
例えば２０〜１００分程度である。The ultrahigh molecular weight polyethylene composite plate is manufactured under a pressing temperature of 140 to 200 ° C., preferably 16
The pressure is 0 to 170 ° C., and the pressure is 5 to 50 kg / cm 2 , preferably 20 to 30 kg / cm 2 . The pressing time is a time sufficient for melt-plasticizing the ultrahigh molecular weight polyethylene compound to form a composite plate having a flat surface, which is, for example, about 20 to 100 minutes.
【００２３】ここで、プレス温度１４０℃未満であれ
ば、温度が低すぎて、表面が焼結した超高分子量ポリエ
チレン配合物粉末の予成形シートが、溶融可塑化され
ず、成形が困難であるので、好ましくない。またプレス
温度が２００℃を越えると、溶融可塑化された超高分子
量ポリエチレンが流れたり、複合板の表面にいわゆる焼
けが生じるので、好ましくない。またプレス時の圧力が
５kg／cm2 未満であれば、予成形シートの密度が低すぎ
て伝熱性が良くなく、後述の超高分子量ポリエチレン複
合板の製造のさい、内在する空気を追い出すことができ
ないので、好ましくない。また圧力が５０kg／cm2 を越
えると、溶融可塑化された超高分子量ポリエチレンが流
れたりするので、好ましくない。Here, if the pressing temperature is lower than 140 ° C., the temperature is too low and the preformed sheet of the ultra-high molecular weight polyethylene compound powder whose surface is sintered is not melted and plasticized and is difficult to form. Therefore, it is not preferable. Further, if the pressing temperature exceeds 200 ° C., melt-plasticized ultra-high molecular weight polyethylene will flow and so-called burning will occur on the surface of the composite plate, which is not preferable. If the pressure at the time of pressing is less than 5 kg / cm 2 , the density of the preformed sheet is too low and the heat conductivity is not good, and the internal air may be expelled during the production of the ultra high molecular weight polyethylene composite plate described later. It is not possible because it cannot be done. Further, if the pressure exceeds 50 kg / cm 2 , the melt-plasticized ultrahigh molecular weight polyethylene may flow, which is not preferable.
【００２４】なお、この発明の変形方法として、上記パ
ンチングメタルシート等の硬質有孔板よりなる芯材の両
面に、表面を焼結させた超高分子量ポリエチレン配合物
粉末よりつくられた少なくとも１枚の予成形シートをそ
れぞれ積層し、さらに一方の予成形シートの表面に、少
なくとも１枚のポリオレフィン系樹脂シートを積層し、
これらを加圧、加熱して、一体化し、超高分子量ポリエ
チレン複合板を製造する場合もある。As a modification of the present invention, at least one sheet made of an ultrahigh molecular weight polyethylene compound powder whose surfaces are sintered on both surfaces of a core material made of a hard perforated plate such as the punching metal sheet described above. Of the preformed sheets, and further, at least one polyolefin-based resin sheet is laminated on the surface of one of the preformed sheets,
In some cases, these are pressurized and heated to be integrated to produce an ultrahigh molecular weight polyethylene composite plate.
【００２５】あるいはまた、上記芯材の片面に、表面を
焼結させた超高分子量ポリエチレン配合物粉末の予成形
シートを積層し、同芯材の他面に、少なくとも１枚のポ
リオレフィン系樹脂シートを積層し、これらを加圧、加
熱して、一体化し、超高分子量ポリエチレン複合板を製
造する場合もある。Alternatively, one side of the core material is laminated with a preformed sheet of powdered ultra high molecular weight polyethylene compound having a sintered surface, and at least one polyolefin resin sheet is provided on the other side of the core material. There is also a case where the ultra high molecular weight polyethylene composite plate is manufactured by stacking, and pressing and heating these to integrate them.
【００２６】ここで、上記２つの変形方法の場合、ポリ
オレフィン系樹脂シートの具体例としては、ポリプロピ
レン樹脂シート、あるいは通常のポリエチレン樹脂シー
ト等があげられる。Here, in the case of the above two modification methods, a specific example of the polyolefin resin sheet is a polypropylene resin sheet, a normal polyethylene resin sheet, or the like.
【００２７】ポリオレフィン系樹脂シートが例えばポリ
プロピレン樹脂シートである場合、その厚みは、例えば
１〜３mm程度であるのが、好ましい。When the polyolefin resin sheet is, for example, a polypropylene resin sheet, its thickness is preferably about 1 to 3 mm.
【００２８】なお、ポリオレフィン系樹脂シートを併せ
て用いた場合の複合板の成形温度、圧力など成形条件
は、上記の芯材の両面に、表面を焼結させた超高分子量
ポリエチレン配合物粉末の予成形シートを積層した場合
とほゞ同様である。The molding conditions such as molding temperature and pressure of the composite plate when a polyolefin resin sheet is used together are as follows: This is almost the same as the case where the preformed sheets are laminated.
【００２９】また、上記超高分子量ポリエチレン複合板
の製造法においては、いずれの方法の場合にも、硬質有
孔板よりなる芯材を２枚以上、好ましくは２〜３枚使用
しても良い。芯材を２枚以上使用する場合には、通常、
隣り合う芯材同志の間に、表面を焼結させた超高分子量
ポリエチレン配合物粉末よりつくられた予成形シートを
介在させる。In any of the above methods for producing an ultra high molecular weight polyethylene composite plate, two or more, preferably two or three, core materials made of hard perforated plates may be used in any method. . When using two or more cores,
A preformed sheet made of ultra-high molecular weight polyethylene compound powder whose surface is sintered is interposed between adjacent core materials.
【００３０】[0030]
【作用】上記の方法によれば、超高分子量ポリエチレン
複合板を製造するにあたり、所定の開孔率を有するパン
チングメタルシート等の硬質有孔板よりなる芯材の両面
に、表面を焼結させた超高分子量ポリエチレン配合物粉
末の予成形シートを積層し、加圧、加熱して、一体化す
るもので、超高分子量ポリエチレン配合物粉末の予成形
シートは、通気性を有しているため、パンチングメタル
シート等の芯材と、超高分子量ポリエチレンシートとの
積層面に、いわゆるエアかみ（空気の入り込み）現象が
起こらず、表裏両側の超高分子量ポリエチレンシートが
芯材の孔の内部で確実に融合して接合され、外観が非常
にきれいであるとともに、複合板全体としての膨脹係数
が抑えられて、熱による膨脹、収縮が小さい、従って膨
らみや剥がれが生じ難い、寸法精度にすぐれた超高分子
量ポリエチレン複合板を製造することができる。According to the above method, when manufacturing an ultra high molecular weight polyethylene composite plate, the surface is sintered on both sides of a core material made of a hard perforated plate such as a punching metal sheet having a predetermined porosity. Preformed sheets of ultra high molecular weight polyethylene compound powder are laminated, pressed and heated to be integrated, and the preformed sheet of ultra high molecular weight polyethylene compound powder has air permeability. The so-called air entrainment (air entrapment) phenomenon does not occur on the laminated surface of the core material such as punching metal sheet and the ultra high molecular weight polyethylene sheet, and the ultra high molecular weight polyethylene sheets on the front and back sides are inside the hole of the core material. It is surely fused and joined, the appearance is very clean, and the expansion coefficient of the composite plate as a whole is suppressed, so that expansion and contraction due to heat is small, and therefore swelling and peeling occur. Hard, it is possible to produce ultra high molecular weight polyethylene composite plate with excellent dimensional accuracy.
【００３１】勿論、複合板は、表面滑性にすぐれてい
て、内張り用ライニング材として使用したさい、被搬送
粉粒体の内面付着やブリッジ現象等のトラブルの発生を
有効に防止し得るとともに、耐摩耗性にすぐれ、かつ機
械的強度が非常に大きいものである。Of course, the composite plate has excellent surface smoothness, and when it is used as a lining material for an inner lining, it can effectively prevent troubles such as adhesion on the inner surface of the granular material to be conveyed and bridge phenomenon, and It has excellent wear resistance and very high mechanical strength.
【００３２】また超高分子量ポリエチレン複合板は、寸
法精度にすぐれているため、内張り用ライニング材とし
て使用するさい、複合板間のギャップを小さくとること
ができ、従って被搬送粉粒体の一部がギャップに入り込
んで居着するといった問題も生じない。Further, since the ultra high molecular weight polyethylene composite plate has excellent dimensional accuracy, when used as a lining material for an inner lining, the gap between the composite plates can be made small, and therefore, a part of the powdery or granular material to be transported. There is no problem such as that they enter the gap and settle down.
【００３３】なお、パンチングメタルシート等の硬質有
孔板よりなる芯材の両面に、表面を焼結させた超高分子
量ポリエチレン配合物粉末よりつくられた少なくとも１
枚の予成形シートをそれぞれ積層し、さらに一方の予成
形シートの表面に、少なくとも１枚のポリオレフィン系
樹脂シートを積層し、これらを加圧、加熱して、一体化
し、超高分子量ポリエチレン複合板を製造する場合もあ
る。It should be noted that at least one of the core material made of a hard perforated plate such as a punching metal sheet is made of an ultra high molecular weight polyethylene compound powder whose surfaces are sintered.
An ultra-high molecular weight polyethylene composite plate is prepared by laminating each of the preformed sheets and further laminating at least one polyolefin-based resin sheet on the surface of one of the preformed sheets, and pressing and heating these to integrate them. May be manufactured.
【００３４】あるいはまた、上記芯材の片面に、表面を
焼結させた超高分子量ポリエチレン配合物粉末の予成形
シートを積層し、同芯材の他面に、少なくとも１枚のポ
リオレフィン系樹脂シートを積層し、これらを加圧、加
熱して、一体化し、超高分子量ポリエチレン複合板を製
造する場合もある。Alternatively, one side of the core material is laminated with a preformed sheet of the surface-sintered ultra high molecular weight polyethylene compound powder, and the other side of the core material is provided with at least one polyolefin resin sheet. There is also a case where the ultra high molecular weight polyethylene composite plate is manufactured by stacking, and pressing and heating these to integrate them.
【００３５】そして、これらいずれの方法の場合にも、
表面を焼結させた超高分子量ポリエチレン配合物粉末の
予成形シートを使用しているため、上記の場合と同様の
理由により、エアかみ（空気の入り込み）現象が起こら
ず、外観のきれいなかつ熱による膨脹、収縮の小さい寸
法精度にすぐれた超高分子量ポリエチレン複合板を得る
ことができるものである。In any of these methods,
Because a preformed sheet of ultra-high molecular weight polyethylene compound powder whose surface is sintered is used, for the same reason as above, the air bite (air entrapment) phenomenon does not occur, the appearance is clean and the heat is high. It is possible to obtain an ultra-high molecular weight polyethylene composite plate which is small in expansion and contraction due to the above and has excellent dimensional accuracy.
【００３６】[0036]
【実施例】つぎに、この発明の実施例を図面を参照して
説明する。Embodiments of the present invention will now be described with reference to the drawings.
【００３７】実施例１ この発明の方法により図１に示す超高分子量ポリエチレ
ン複合板(10)を製造した。Example 1 An ultra high molecular weight polyethylene composite plate (10) shown in FIG. 1 was produced by the method of the present invention.
【００３８】まず、直径５mmの孔(2) が千鳥状配列にあ
けられた開孔率２０％を有する１mm×４５０mm×４８０
mmの大きさのアルミニウム・パンチングシートよりなる
芯材(1) を用意するとともに、表面を焼結させた超高分
子量ポリエチレン配合物粉末よりつくられた厚み２mm×
幅４５０mm×長さ４８０mmの大きさの予成形シート(3)
(3)を４枚用意する。First, holes (2) having a diameter of 5 mm are formed in a staggered arrangement and have an opening ratio of 20%. 1 mm × 450 mm × 480
Prepare a core material (1) consisting of an aluminum punching sheet with a size of mm, and have a thickness of 2 mm made from ultra-high molecular weight polyethylene compound powder whose surface is sintered.
Preformed sheet (3) measuring 450 mm in width and 480 mm in length
Prepare 4 sheets of (3).
【００３９】つぎに、これらの材料を、成形プレスの上
型(5) と下型(6) の中間に、アルミニウムパンチングシ
ートよりなる芯材(1) を中央にして、これの両面に超高
分子量ポリエチレン予成形シート(3) を２枚ずつ積層し
た。Next, these materials are placed in the middle of the upper die (5) and the lower die (6) of the molding press with the core material (1) made of an aluminum punching sheet at the center, and both sides of this material are super-high. Two molecular weight polyethylene preformed sheets (3) were laminated in pairs.
【００４０】そして、芯材(1) および予成形シート(3)
(3)の積層物を、プレス温度１６５℃、圧力２０kg／cm
2 で、３０分間加圧、加熱して、超高分子量ポリエチレ
ン配合物粉末の予成形シート(3) を可塑化し、芯材(1)
を中心にして、これの両面の超高分子量ポリエチレンシ
ート(11)(11)を、芯材(1) の多数の孔(2) を通して一体
化し、超高分子量ポリエチレン複合板(10)を製造した。
この複合板(10)は、その後常温まで放冷した。Then, the core material (1) and the preformed sheet (3)
Press the laminate of (3) at a press temperature of 165 ° C and a pressure of 20 kg / cm.
At 2 , pressurize and heat for 30 minutes to plasticize the preformed sheet (3) of the ultra-high molecular weight polyethylene compound powder, and to form the core material (1)
The ultra-high-molecular-weight polyethylene sheet (11) (11) on both sides of this was integrated through a large number of holes (2) in the core material (1) to produce an ultra-high-molecular-weight polyethylene composite plate (10). .
The composite plate (10) was then allowed to cool to room temperature.
【００４１】こうして、得られた全厚み５mmおよび幅４
４０mm×長さ４７０mmの超高分子量ポリエチレン複合板
(10)は、超高分子量ポリエチレンの流れも少なく、また
表面焼けや、エアかみ（空気の入り込み）の無い良好な
外観を有する板状成形品であった。またこの成形品を縦
横に切断して、内部を調べてみたところ、パンチングシ
ートよりなる芯材(1) の各孔(2) 部分で、両側の超高分
子量ポリエチレンが融合一体化し、きれいに融着してい
た。The total thickness thus obtained was 5 mm and the width was 4
40 mm x 470 mm ultra high molecular weight polyethylene composite plate
(10) was a plate-shaped molded product that had a small flow of ultra-high molecular weight polyethylene and had a good appearance without surface burning or air entrainment (air entrapment). Also, when this molded product was cut lengthwise and widthwise and the inside was examined, the ultrahigh molecular weight polyethylene on both sides was fused and integrated at each hole (2) part of the core material (1) made of a punching sheet, and it was fused cleanly. Was.
【００４２】また、この超高分子量ポリエチレン複合板
(10)は、複合板(10)全体としての膨脹係数が抑えられて
おり、例えばこの実施例１で得られたアルミニウム・パ
ンチングシートを芯材(1) とする超高分子量ポリエチレ
ン複合板(10)の膨脹係数は、２．４〜２．８×１０-5で
あるのに対し、超高分子量ポリエチレンシート単独の膨
脹係数は、１２．７〜１５．０×１０-5であった。Also, this ultra high molecular weight polyethylene composite plate
The expansion coefficient of the composite plate (10) as a whole is suppressed, and, for example, the ultrahigh molecular weight polyethylene composite plate (10) having the aluminum punching sheet obtained in Example 1 as the core material (1) is used. The expansion coefficient of () was 2.4 to 2.8 × 10 −5 , whereas the expansion coefficient of the ultrahigh molecular weight polyethylene sheet alone was 12.7 to 15.0 × 10 −5 .
【００４３】従って、この発明による超高分子量ポリエ
チレン複合板(10)は、熱による膨脹、収縮が小さくてす
み、従って膨らみや剥がれが生じ難く、寸法精度にすぐ
れているものである。Therefore, the ultrahigh molecular weight polyethylene composite plate (10) according to the present invention is small in expansion and contraction due to heat, and therefore is unlikely to bulge or peel off and has excellent dimensional accuracy.
【００４４】つぎに、この超高分子量ポリエチレン複合
板(10)を、搬送コンベヤ・ラインに備えられるホッパー
の内張り用ライニング材として使用したところ、複合板
(10)は、その表面に超高分子量ポリエチレンシート(11)
が存在しているために、表面滑性にすぐれていて、被搬
送粉粒体の内面付着やブリッジ現象等のトラブルの発生
を有効に防止し得、かつ耐摩耗性にすぐれているととも
に、機械的強度が非常に大きいものであった。Next, when this ultra high molecular weight polyethylene composite plate (10) was used as a lining material for a hopper provided in a conveyor line, a composite plate was obtained.
(10) is an ultra high molecular weight polyethylene sheet on its surface (11)
Since it has excellent surface smoothness, it can effectively prevent the occurrence of troubles such as adhesion on the inner surface of the conveyed powder and granular material and the bridge phenomenon, and has excellent wear resistance, It was very strong.
【００４５】また超高分子量ポリエチレン複合板(10)
は、寸法精度にすぐれているため、内張り用ライニング
材として使用したさい、複合板(10)同志間のギャップを
小さくとることができ、従って被搬送粉粒体の一部がギ
ャップに入り込んで居着するといった問題も生じなかっ
た。Ultra high molecular weight polyethylene composite plate (10)
Since it has excellent dimensional accuracy, when used as a lining material for lining, the gap between the composite plates (10) can be made small, so that part of the powder particles to be conveyed enters the gap. There was no problem of wearing it.
【００４６】実施例２ 図３は、この発明の第２実施例の実施工程を示すもので
ある。ここで、上記第１実施例の場合と異なる点は、成
形プレスの上型(5) と下型(6) の中間に、アルミニウム
パンチングシートよりなる芯材(1) を中央にして、これ
の上側に、厚み２mmの２枚の超高分子量ポリエチレン予
成形シート(3)(3)を配置し、同下側に、厚み２mmの１枚
の超高分子量ポリエチレン予成形シート(3) と、厚み１
mmの１枚のポリプロピレン樹脂シートとを配置して積層
した点にある。Embodiment 2 FIG. 3 shows a process of carrying out the second embodiment of the present invention. Here, the point different from the case of the first embodiment is that the core material (1) made of an aluminum punching sheet is centered between the upper die (5) and the lower die (6) of the molding press. Two sheets of ultrahigh molecular weight polyethylene preformed sheet (3) (3) with a thickness of 2 mm are placed on the upper side, and one sheet of ultrahigh molecular weight polyethylene preformed sheet with a thickness of 2 mm (3) and a thickness of 2 mm 1
1 mm polypropylene resin sheet is arranged and laminated.
【００４７】この積層物を、上記実施例１の成形条件と
同じ条件で加圧、加熱して、一体化し、超高分子量ポリ
エチレン複合板(10)を製造した。This laminate was pressed and heated under the same molding conditions as in Example 1 above to integrate them, to produce an ultra high molecular weight polyethylene composite plate (10).
【００４８】実施例３ 図４は、この発明の第３実施例の実施工程を示すもので
ある。ここで、上記第１実施例の場合と異なる点は、成
形プレスの上型(5) と下型(6) の中間に、アルミニウム
パンチングシートよりなる芯材(1) を中央にして、これ
の上側に、厚み２mmの２枚の超高分子量ポリエチレン予
成形シート(3)(3)を配置し、同下側に、厚み２mmの１枚
のポリプロピレン樹脂シートを配置して積層した点にあ
る。Embodiment 3 FIG. 4 shows a process of implementing a third embodiment of the present invention. Here, the point different from the case of the first embodiment is that the core material (1) made of an aluminum punching sheet is centered between the upper die (5) and the lower die (6) of the molding press. The point is that two ultra-high molecular weight polyethylene preformed sheets (3) and (3) having a thickness of 2 mm are arranged on the upper side, and one polypropylene resin sheet having a thickness of 2 mm is arranged and laminated on the lower side.
【００４９】この積層物を、上記実施例１の成形条件と
同じ条件で加圧、加熱して、一体化し、超高分子量ポリ
エチレン複合板(10)を製造した。This laminate was pressed and heated under the same molding conditions as in Example 1 above to integrate them, to produce an ultrahigh molecular weight polyethylene composite plate (10).
【００５０】なお、これらの実施例２および３で得られ
た超高分子量ポリエチレン複合板(10)は、全厚み５mmお
よび幅４４０mm×長さ４７０mmの大きさを有しており、
またいずれの場合にも成形のさいに、表面を焼結させた
超高分子量ポリエチレン配合物粉末の予成形シート(3)
が、芯材(1) の少なくとも片側に積層しているため、上
記実施例１の場合と同様に、エアかみ（空気の入り込
み）現象が起こらず、外観がきれいであり、かつ熱によ
る膨脹、収縮が小さく、寸法精度にすぐれているもので
あった。The ultra high molecular weight polyethylene composite plates (10) obtained in Examples 2 and 3 had a total thickness of 5 mm and a width of 440 mm and a length of 470 mm.
Also, in any case, during molding, a pre-formed sheet of ultra-high molecular weight polyethylene compound powder whose surface is sintered (3)
However, since it is laminated on at least one side of the core material (1), as in the case of Example 1 above, the phenomenon of air entrainment (air entrapment) does not occur, the appearance is clean, and expansion due to heat, The shrinkage was small and the dimensional accuracy was excellent.
【００５１】そしてつぎに、これら実施例２および３で
得られた超高分子量ポリエチレン複合板(10)を、それぞ
れ超高分子量ポリエチレンシート(11)側を表面として、
上記ホッパーの内張り用ライニング材に同様に使用した
ところ、これらの複合板(10)は、実施例１の場合と同様
のすぐれた性能を有するものであった。Then, the ultra high molecular weight polyethylene composite plates (10) obtained in Examples 2 and 3 were prepared with the ultra high molecular weight polyethylene sheet (11) side as the surface.
When used in the same way as the lining material for the hopper, the composite plate (10) had the same excellent performance as in Example 1.
【００５２】[0052]
【発明の効果】この発明による超高分子量ポリエチレン
複合板の製造法は、上述のように、開孔率１０〜８０％
を有するパンチングメタルシート等の硬質有孔板よりな
る芯材の両面に、表面を焼結させた超高分子量ポリエチ
レン配合物粉末よりつくられた少なくとも１枚の予成形
シートをそれぞれ積層し、これらを加圧、加熱して、一
体化し、超高分子量ポリエチレン複合板を得るもので、
この発明の方法によれば、超高分子量ポリエチレン配合
物粉末の予成形シートが通気性を有しているため、パン
チングメタルシート等の硬質有孔板よりなる芯材と、超
高分子量ポリエチレンシートとの積層面に、いわゆるエ
アかみ（空気の入込み現象）が起こらず、表裏両側の超
高分子量ポリエチレンシートが、硬質有孔板よりなる芯
材の孔の内部で確実に融合して接合され、外観が非常に
きれいであるとともに、複合板全体としての膨脹係数が
抑えられて、熱による膨脹、収縮が非常に小さいもので
ある。As described above, the method for producing an ultrahigh molecular weight polyethylene composite plate according to the present invention has a porosity of 10 to 80%.
At least one preformed sheet made of a super-high molecular weight polyethylene compound powder whose surface is sintered is laminated on both sides of a core material made of a hard perforated plate such as a punching metal sheet having It is pressurized and heated to be integrated to obtain an ultra high molecular weight polyethylene composite plate.
According to the method of the present invention, since the preformed sheet of the ultra-high molecular weight polyethylene compound powder has air permeability, the core material made of a hard perforated plate such as a punching metal sheet and the ultra-high molecular weight polyethylene sheet So-called air entrainment (air entrapment phenomenon) does not occur on the laminated surface of, and the ultra-high molecular weight polyethylene sheets on both the front and back sides are securely fused and bonded inside the holes of the core material made of hard perforated plates, Is very clean, and the expansion coefficient of the composite plate as a whole is suppressed, so that expansion and contraction due to heat are very small.
【００５３】従ってこの発明の方法により製造された超
高分子量ポリエチレン複合板は、膨らみや剥がれが生じ
難く、寸法精度にすぐれているものである。Therefore, the ultrahigh molecular weight polyethylene composite plate produced by the method of the present invention is unlikely to cause bulging or peeling and has excellent dimensional accuracy.
【００５４】勿論、この発明の方法により製造された複
合板は、表面滑性にすぐれていて、内張り用ライニング
材として使用したさい、被搬送粉粒体の内面付着やブリ
ッジ現象等のトラブルの発生を有効に防止し得るととも
に、耐摩耗性にすぐれ、かつ機械的強度が非常に大きい
ものである。Of course, the composite plate produced by the method of the present invention has excellent surface smoothness, and when it is used as a lining material for an inner lining, troubles such as adhesion on the inner surface of the granular material to be conveyed and bridge phenomenon occur. It has excellent wear resistance and very high mechanical strength.
【００５５】さらに超高分子量ポリエチレン複合板は、
寸法精度にすぐれているため、内張り用ライニング材と
して使用するさい、複合板間のギャップを小さくとるこ
とができ、従って被搬送粉粒体の一部がギャップに入り
込んで居着するといった問題も生じない。Further, the ultra high molecular weight polyethylene composite plate is
Since it has excellent dimensional accuracy, it can be used as a lining material for lining, and the gap between composite plates can be made small. Absent.
【００５６】またこの発明の方法によれば、従来のよう
に接着剤層を介して金属製芯材と超高分子量ポリエチレ
ンシートとを接合する場合に比べ、特殊な接着作業を必
要せず、接合強度が充分に大きく、超高分子量ポリエチ
レンシートが芯材から剥がれにくいという効果を奏す
る。Further, according to the method of the present invention, as compared with the conventional case where the metal core material and the ultra high molecular weight polyethylene sheet are joined via the adhesive layer, the special joining work is not required and the joining is performed. The strength is sufficiently high, and the ultra high molecular weight polyethylene sheet has the effect of being difficult to peel off from the core material.
【図１】本発明の方法により製造した超高分子量ポリエ
チレン複合板の部分切欠き斜視図である。FIG. 1 is a partially cutaway perspective view of an ultra high molecular weight polyethylene composite plate produced by the method of the present invention.
【図２】本発明の方法の実施工程の成形プレス部分の断
面図で、上下型の中間に、パンチングメタルシートより
なる芯材と、超高分子量ポリエチレン予成形シートとを
積層する状態が示されている。FIG. 2 is a cross-sectional view of a molding press portion in the step of carrying out the method of the present invention, showing a state in which a core material made of a punching metal sheet and an ultrahigh molecular weight polyethylene preformed sheet are laminated in the middle of the upper and lower molds. ing.
【図３】本発明の変形方法の実施工程の断面図で、上下
型の中間に芯材および予成形シートとともに、ポリオレ
フィン系樹脂シートを積層する状態が示されている。FIG. 3 is a cross-sectional view of the steps of carrying out the deformation method of the present invention, showing a state in which a polyolefin resin sheet is laminated in the middle of the upper and lower molds together with a core material and a preformed sheet.
【図４】本発明のいま１つの変形方法の実施工程の断面
図で、上下型の中間において、パンチングメタルシート
よりなる芯材の上側に超高分子量ポリエチレン予成形シ
ート、同下側にポリオレフィン系樹脂シートを積層する
状態が示されている。FIG. 4 is a cross-sectional view of the steps of carrying out another modification method of the present invention, in which, in the middle of the upper and lower molds, an ultrahigh molecular weight polyethylene preformed sheet is provided above the core material made of a punching metal sheet and a polyolefin-based material is provided below the core material. A state where resin sheets are laminated is shown.
１ パンチングメタルシート（芯材） ２ 孔 ３ 超高分子量ポリエチレン予成形シート ４ ポリオレフィン系樹脂シート １０ 超高分子量ポリエチレン複合板 １１ 超高分子量ポリエチレン・シート 1 Punching metal sheet (core material) 2 Holes 3 Ultra high molecular weight polyethylene preformed sheet 4 Polyolefin resin sheet 10 Ultra high molecular weight polyethylene composite plate 11 Ultra high molecular weight polyethylene sheet
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｌ 9:00 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location B29L 9:00
Claims (3)
よりなる芯材(1) の両面に、表面を焼結させた超高分子
量ポリエチレン配合物粉末よりつくられた少なくとも１
枚の予成形シート(3) をそれぞれ積層し、これらを加
圧、加熱して、一体化し、超高分子量ポリエチレン複合
板(10)を得ることを特徴とする、超高分子量ポリエチレ
ン複合板の製造法。1. A core material (1) made of a hard perforated plate having a porosity of 10 to 80%, and at least one made of an ultrahigh molecular weight polyethylene compound powder whose surfaces are sintered on both surfaces.
Manufacture of ultra-high molecular weight polyethylene composite plate, characterized in that the pre-formed sheets (3) are laminated and pressed and heated to be integrated to obtain the ultra-high molecular weight polyethylene composite plate (10). Law.
一方の表面に、さらに少なくとも１枚のポリオレフィン
系樹脂シート(4) を積層し、これらを加圧、加熱して、
一体化し、超高分子量ポリエチレン複合板(10)を得る、
請求項１記載の超高分子量ポリエチレン複合板の製造
法。2. A preformed sheet (3) laminated on a core material (1) is further laminated with at least one polyolefin-based resin sheet (4) on one surface thereof, and these are pressurized and heated,
Integrate to obtain an ultra high molecular weight polyethylene composite plate (10),
The method for producing an ultra high molecular weight polyethylene composite plate according to claim 1.
よりなる芯材(1) の片面に、表面を焼結させた超高分子
量ポリエチレン配合物粉末よりつくられた少なくとも１
枚の予成形シート(3) を積層し、同芯材(1) の他面に、
少なくとも１枚のポリオレフィン系樹脂シート(4) を積
層し、これらを加圧、加熱して、一体化し、超高分子量
ポリエチレン複合板(10)を得ることを特徴とする、超高
分子量ポリエチレン複合板の製造法。3. A core material (1) made of a hard perforated plate having a porosity of 10 to 80%, and at least one made of an ultrahigh molecular weight polyethylene compound powder whose surface is sintered on one side.
Laminate the preformed sheets (3), and on the other side of the core material (1),
An ultrahigh molecular weight polyethylene composite plate, characterized in that at least one polyolefin resin sheet (4) is laminated, and these are pressed and heated to be integrated to obtain an ultrahigh molecular weight polyethylene composite plate (10). Manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5231593A JPH0781014A (en) | 1993-09-17 | 1993-09-17 | Manufacturing method of ultra high molecular weight polyethylene composite plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5231593A JPH0781014A (en) | 1993-09-17 | 1993-09-17 | Manufacturing method of ultra high molecular weight polyethylene composite plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0781014A true JPH0781014A (en) | 1995-03-28 |
Family
ID=16925953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5231593A Withdrawn JPH0781014A (en) | 1993-09-17 | 1993-09-17 | Manufacturing method of ultra high molecular weight polyethylene composite plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0781014A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015047723A (en) * | 2013-08-30 | 2015-03-16 | オイレス工業株式会社 | Plate material made of ultrahigh-molecular weight polyethylene and sliding member using the same, and method for producing plate material made of ultrahigh-molecular weight polyethylene |
-
1993
- 1993-09-17 JP JP5231593A patent/JPH0781014A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015047723A (en) * | 2013-08-30 | 2015-03-16 | オイレス工業株式会社 | Plate material made of ultrahigh-molecular weight polyethylene and sliding member using the same, and method for producing plate material made of ultrahigh-molecular weight polyethylene |
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| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
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