JP3212055B2 - Plastic sintered filter - Google Patents
Plastic sintered filterInfo
- Publication number
- JP3212055B2 JP3212055B2 JP34278393A JP34278393A JP3212055B2 JP 3212055 B2 JP3212055 B2 JP 3212055B2 JP 34278393 A JP34278393 A JP 34278393A JP 34278393 A JP34278393 A JP 34278393A JP 3212055 B2 JP3212055 B2 JP 3212055B2
- Authority
- JP
- Japan
- Prior art keywords
- molecular weight
- polyolefin resin
- porous substrate
- sintered filter
- ultra
- 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 - Fee Related
Links
Landscapes
- Filtering Materials (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はプラスチック製焼結フィ
ルター、詳しくは気体又は液体から微細な塵粒子を分離
ないし濾過する、プラスチックを焼結したフィルターに
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sintered plastic filter, and more particularly to a sintered plastic filter for separating or filtering fine dust particles from gas or liquid.
【０００２】[0002]
【従来の技術】従来、各種の気体又は液体等から特に空
気中から微細な塵粒子を分離するフイルターとして、プ
ラスチックの多孔質基体の表面の気孔に、微粒子状の非
粘着性に優れた充填材を被着したものが知られている。
このフィルターは、超高分子量ポリエチレン樹脂に中分
子量ポリエチレン樹脂を混合して焼結し、多孔質基体に
成形したものである。2. Description of the Related Art Conventionally, as a filter for separating fine dust particles from various gases or liquids, particularly from the air, a fine particulate non-adhesive filler is added to the pores on the surface of a plastic porous substrate. Is known.
This filter is obtained by mixing a medium-molecular-weight polyethylene resin with an ultra-high-molecular-weight polyethylene resin, sintering the mixture, and forming the mixture into a porous substrate.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記のフィル
ターは、少なくとも２種類の樹脂を、適切にコントロー
ルした状態で混合しなければ、孔径を均質に成形するこ
とは困難である。一方、超高分子量ポリエチレン樹脂に
中分子量ポリエチレン樹脂を混合することなく、超高分
子量ポリエチレン樹脂単独で成形すると、超高分子量樹
脂が溶融時にほとんど流動性を示さないため、加工性が
悪く、多孔質基体を成形できなかったり、多孔質基体と
して充分な性能を発揮しないものとなる。However, it is difficult to uniformly form the pore size of the above-mentioned filter unless at least two kinds of resins are mixed in an appropriately controlled state. On the other hand, if the ultra-high-molecular-weight polyethylene resin is molded alone without mixing the medium-molecular-weight polyethylene resin with the ultra-high-molecular-weight polyethylene resin, the ultra-high-molecular-weight resin hardly exhibits fluidity when melted, so the processability is poor and the The substrate cannot be formed, or does not exhibit sufficient performance as a porous substrate.
【０００４】本発明は、加工性に優れ、成形ムラがなく
均質な孔径を有し、引張強度等の機械的特性に優れたフ
ィルターを提供することを目的とするものである。An object of the present invention is to provide a filter which is excellent in processability, has a uniform pore size without forming unevenness, and has excellent mechanical properties such as tensile strength.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記目的を達
成するためになされたもので、その要旨は、ぶどうの房
のようにいくつかの小球状の一次粒子が部分的に融着結
合した、超高分子量エチレン系ポリオレフィン樹脂を焼
結成形して得られた透過性の多孔質基体の表面側の気孔
に、前記多孔質基体を構成する主成分をなす前記ポリオ
レフィン樹脂よりも粒子径の小さい微粒子充填材を付着
してなるプラスチック製焼結フィルターである。SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and its gist is that of grape bunches.
Some small spherical primary particles are partially fused like
Combined, the pores of the surface side of the porous substrate of permeability obtained an ultra high molecular weight ethylene-based polyolefin resin to sinter molding, the particle diameter than the polyolefin resin forming the main constituent of the porous substrate This is a plastic sintered filter to which a particulate filler having a small particle size is adhered.
【０００６】本発明において基材として用いる超高分子
量エチレン系ポリオレフィン樹脂は、重量平均分子量が
２００万以上であって、高融点であって、しかもその形
状が特定のものである。The ultrahigh molecular weight ethylene polyolefin resin used as the substrate in the present invention has a weight average molecular weight of 2,000,000 or more, a high melting point, and a specific shape.
【０００７】すなわち、多孔質基体を構成する超高分子
量エチレン系ポリオレフィン樹脂として、ぶどう状のも
のを用いる。この樹脂は、ぶどうの房のようにいくつか
の小球状の一次粒子が部分的に融着結合したものであ
る。その形状は、例えば１００倍程度に拡大した写真を
撮影することによって判別することができる。粒径につ
いては特に限定されるものではないが、通常、平均１０
０〜２００μｍ程度の範囲にあるものが好ましい。な
お、房中の小球の数は任意であり、またその一部は１個
の一次粒子で形成されていてもよい。小球状の一次粒子
は、通常、１０〜５０μｍ程度の範囲にあることが好ま
しい。That is, a grape-like resin is used as the ultrahigh molecular weight ethylene-based polyolefin resin constituting the porous substrate. This resin is formed by partial fusion bonding of some small spherical primary particles like a grape cluster. The shape can be determined by, for example, taking a photograph enlarged about 100 times. Although the particle size is not particularly limited, it is usually 10
Those having a range of about 0 to 200 μm are preferable. The number of small spheres in the chamber is arbitrary, and a part thereof may be formed by one primary particle. Preferably, the small spherical primary particles are usually in a range of about 10 to 50 μm.
【０００８】上記合成樹脂基材を用いて、これを例えば
筒状等、所望の形状に焼結成形した多孔質基体は、透過
性で多孔性であり、約１０〜１００μｍの細孔径を有し
ている。A porous substrate obtained by sintering the above synthetic resin substrate into a desired shape such as a cylindrical shape is permeable and porous, and has a pore diameter of about 10 to 100 μm. ing.
【０００９】焼結成形した多孔質基体の表面側（流体流
入側）の気孔に、微粒子充填材を付着させることによ
り、本発明に係るフィルターが得られる。The filter according to the present invention can be obtained by adhering a fine particle filler to the pores on the surface side (fluid inflow side) of the sintered molded porous substrate.
【００１０】多孔質基体の表面の気孔に付着させる微粒
子充填材としては、例えばポリテトラフルオロエチレ
ン、テトラフルオロエチレン−ヘキサフルオロプロピレ
ン共重合体、ポリビニリデンフルオライドから選ばれた
一種又はこれらの二種以上を予め混合したものが使用で
きる。微粒子充填材は、多孔質基体表面の気孔に入り込
みその気孔を小さくし、フィルターとして使用した場合
に捕集効率を高め、多孔質基体表面に捕集された塵埃等
固体粒子を払い落とし易くする。微粒子充填材の平均粒
径は例えば０．２μｍ程度のものが望ましい。The fine particle filler adhering to the pores on the surface of the porous substrate is, for example, one selected from polytetrafluoroethylene, a tetrafluoroethylene-hexafluoropropylene copolymer, and polyvinylidene fluoride, or a mixture thereof. What mixed the above beforehand can be used. The fine particle filler enters pores on the surface of the porous substrate, reduces the pores, increases the collection efficiency when used as a filter, and facilitates the removal of solid particles such as dust collected on the surface of the porous substrate. The average particle diameter of the fine particle filler is desirably, for example, about 0.2 μm.
【００１１】上記微粒子充填材は、通常、バインダーと
共に吹付け等により付着させる。バインダーとしては、
エポキシ系接着剤等を用いることができる。例えば、微
粒子充填材とバインダーとを２０：１程度の重量比で使
用する。多孔質基体への付着量は０．００１〜０．００
２ｇ／ｃｍ2 程度である。The fine particle filler is usually attached together with a binder by spraying or the like. As a binder,
An epoxy-based adhesive or the like can be used. For example, a particulate filler and a binder are used in a weight ratio of about 20: 1. 0.001-0.00 on the porous substrate
It is about 2 g / cm 2 .
【００１２】なお、カーボンブラックを主体とした導電
性物質を、例えば分子量約４００万の超高分子量エチレ
ン系ポリオレフィン樹脂に約１〜１０％添加したものを
用いることにより、フィルターに良好な導電性を付与す
ることができる。By using an electrically conductive substance mainly composed of carbon black, for example, about 1 to 10% of an ultra-high molecular weight ethylene-based polyolefin resin having a molecular weight of about 4 million, good conductivity can be imparted to the filter. Can be granted.
【００１３】[0013]
（実施例１）ぶどう状の超高分子量ポリエチレン（平均
分子量４００万、平均粒径１８０μｍ）を型に充填し、
１８０〜２３０℃の温度で所定時間加熱して焼結成形し
た多孔質基体の表面に、ポリテトラフルオロエチレンの
微粒子（平均粒径０．２μｍ）をバインダー（エポキシ
系接着剤）と共に吹き付けて付着させ（０．００１５ｇ
／ｃｍ2 ）、フイルターを得た。Example 1 Grape-shaped ultra-high molecular weight polyethylene (average molecular weight 4,000,000, average particle diameter 180 μm) was filled in a mold,
Fine particles of polytetrafluoroethylene (average particle size: 0.2 μm) are sprayed together with a binder (epoxy adhesive) onto the surface of the porous substrate that has been heated and sintered at a temperature of 180 to 230 ° C. for a predetermined time and adhered. (0.0015g
/ Cm 2 ) to obtain a filter.
【００１４】（実施例２）ぶどう状の超高分子量ポリエ
チレン（平均分子量４００万、平均粒径１８０μｍ）と
カーボンブラックを９５：５の割合で混合しこれを型に
充填し、１８０〜２３０℃の温度で所定時間加熱して焼
結成形した多孔質基体の表面に、ポリテトラフルオロエ
チレンの微粒子（平均粒径０．２μｍ）をバインダー
（エポキシ系接着剤）と共に吹き付けて付着させ（０．
００１５ｇ／ｃｍ2 ）、フイルターを得た。Example 2 Grape-like ultrahigh molecular weight polyethylene (average molecular weight: 4,000,000, average particle size: 180 μm) and carbon black were mixed at a ratio of 95: 5, and the mixture was filled in a mold. Polytetrafluoroethylene fine particles (average particle diameter: 0.2 μm) are sprayed together with a binder (epoxy adhesive) onto the surface of the porous substrate sintered and molded by heating at a predetermined temperature for a predetermined time to adhere (0.
0015 g / cm 2 ) to obtain a filter.
【００１５】（比較例１）塊状の超高分子量ポリエチレ
ン（平均分子量４４０万、平均粒径１２０μｍ）を型に
充填し、１８０〜２３０℃の温度で所定時間加熱して焼
結成形した多孔質基体の表面に、ポリテトラフルオロエ
チレンの微粒子（平均粒径０．２μｍ）をバインダー
（エポキシ系接着剤）と共に吹き付けて付着させ（０．
００１５ｇ／ｃｍ2 ）、フイルターを得た。(Comparative Example 1) A block of ultra-high molecular weight polyethylene (average molecular weight: 4.4 million, average particle size: 120 µm) was filled into a mold, heated at a temperature of 180 to 230 ° C for a predetermined time, and sintered and molded. Particles of polytetrafluoroethylene (average particle size: 0.2 μm) are sprayed together with a binder (epoxy-based adhesive) to adhere to the surface of (.0).
0015 g / cm 2 ) to obtain a filter.
【００１６】（比較例２）塊状の超高分子量ポリエチレ
ン（平均分子量４４０万、平均粒径１２０μｍ）とカー
ボンブラックを９５：５の割合で混合しこれを型に充填
し、１８０〜２３０℃の温度で所定時間加熱して焼結成
形した多孔質基体の表面に、ポリテトラフルオロエチレ
ンの微粒子（平均粒径０．２μｍ）をバインダー（エポ
キシ系接着剤）と共に吹き付けて付着させ（０．００１
５ｇ／ｃｍ2 ）、フイルターを得た。Comparative Example 2 A mass of ultra-high molecular weight polyethylene (average molecular weight: 4.4 million, average particle size: 120 μm) and carbon black were mixed at a ratio of 95: 5, and the mixture was filled in a mold and heated at a temperature of 180 to 230 ° C. Then, fine particles of polytetrafluoroethylene (average particle diameter: 0.2 μm) are sprayed together with a binder (epoxy adhesive) on the surface of the porous substrate sintered and molded by heating for a predetermined time to adhere (0.001).
5 g / cm 2 ) to obtain a filter.
【００１７】上記の実施例１，２及び比較例１，２のフ
ィルターの引張強度等について測定した結果を表１に示
す。実施例のものは、比較例のものに比べて優れた引張
強度を有することがわかる。Table 1 shows the results of measurement of the tensile strength and the like of the filters of Examples 1 and 2 and Comparative Examples 1 and 2. It can be seen that the example has a higher tensile strength than the comparative example.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【発明の効果】本発明によれば、１種類の、ぶどうの房
のようにいくつかの小球状の一次粒子が部分的に融着結
合した、超高分子量エチレン系ポリオレフィン樹脂を用
いることにより、例えば中高分子量ポリエチレン樹脂を
混合することなく、超高分子量ポリエチレン樹脂単独で
成形加工できるとともに、成形ムラを生じることがな
く、均質な孔径を有するフィルターが得られる。また、
このフィルターは引張強度等の機械的強度に優れてお
り、圧力損失も低く維持される。According to the present invention, one kind of grape cluster
Some small spherical primary particles are partially fused like
By using an ultra-high molecular weight ethylene-based polyolefin resin, for example, it is possible to mold the ultra-high molecular weight polyethylene resin alone without mixing a medium-high molecular weight polyethylene resin, and to produce a uniform pore size without generating molding unevenness. A filter having Also,
This filter has excellent mechanical strength such as tensile strength, and pressure loss is kept low.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 39/00 - 39/20 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. 7 , DB name) B01D 39/00-39/20
Claims (3)
一次粒子が部分的に融着結合した、超高分子量エチレン
系ポリオレフィン樹脂を焼結成形して得られた透過性の
多孔質基体の表面側の気孔に、前記多孔質基体を構成す
る主成分をなす前記ポリオレフィン樹脂よりも粒子径の
小さい微粒子充填材を付着してなるプラスチック製焼結
フィルター。(1) Several small spherical particles like a bunch of grapes
The primary component constituting the porous substrate is provided in pores on the surface side of a permeable porous substrate obtained by sintering an ultrahigh molecular weight ethylene-based polyolefin resin in which primary particles are partially fused and bonded. A plastic sintered filter to which a particulate filler having a smaller particle diameter than the polyolefin resin to be formed is adhered.
記超高分子量エチレン系ポリオレフィン樹脂を焼結成形
してなる請求項１記載のプラスチック製焼結フィルタ
ー。2. Before the average particle size is from 100 to 200 μm.
2. A plastic sintered filter according to claim 1, wherein said ultra-high molecular weight ethylene-based polyolefin resin is sintered.
ン樹脂にカーボンブラックを主体とした導電性物質を添
加してある請求項１又は２記載のプラスチック製焼結フ
ィルター。3. The plastic sintered filter according to claim 1, wherein a conductive substance mainly composed of carbon black is added to said ultra high molecular weight ethylene polyolefin resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34278393A JP3212055B2 (en) | 1993-12-16 | 1993-12-16 | Plastic sintered filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34278393A JP3212055B2 (en) | 1993-12-16 | 1993-12-16 | Plastic sintered filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07171318A JPH07171318A (en) | 1995-07-11 |
| JP3212055B2 true JP3212055B2 (en) | 2001-09-25 |
Family
ID=18356469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34278393A Expired - Fee Related JP3212055B2 (en) | 1993-12-16 | 1993-12-16 | Plastic sintered filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3212055B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19624358B4 (en) * | 1996-06-19 | 2005-07-14 | Mann + Hummel Gmbh | heat exchangers |
| JP2000225328A (en) * | 1998-11-30 | 2000-08-15 | Nitto Denko Corp | Filter medium for filter |
| JP2001347686A (en) * | 2000-04-05 | 2001-12-18 | Nitto Denko Corp | Air filter for ink vessel and ink vessel using the same |
| CN102806663B (en) * | 2011-06-02 | 2014-10-01 | 上海超高工程塑料有限公司 | Method for manufacturing plastic filter with polytetrafluoroethylene surface layer |
-
1993
- 1993-12-16 JP JP34278393A patent/JP3212055B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07171318A (en) | 1995-07-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |