JPS63171613A - Production of filter cloth for solid-liquid separation - Google Patents
Production of filter cloth for solid-liquid separationInfo
- Publication number
- JPS63171613A JPS63171613A JP15687A JP15687A JPS63171613A JP S63171613 A JPS63171613 A JP S63171613A JP 15687 A JP15687 A JP 15687A JP 15687 A JP15687 A JP 15687A JP S63171613 A JPS63171613 A JP S63171613A
- Authority
- JP
- Japan
- Prior art keywords
- felt
- filter cloth
- cloth
- polyurethane
- sea
- 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.)
- Pending
Links
- 239000004744 fabric Substances 0.000 title claims abstract description 106
- 239000007788 liquid Substances 0.000 title claims abstract description 27
- 238000000926 separation method Methods 0.000 title claims description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 38
- 229920000642 polymer Polymers 0.000 claims abstract description 28
- 229920002635 polyurethane Polymers 0.000 claims abstract description 28
- 239000004814 polyurethane Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002904 solvent Substances 0.000 claims abstract description 19
- 239000000835 fiber Substances 0.000 claims abstract description 18
- 230000035699 permeability Effects 0.000 claims abstract description 10
- 238000002844 melting Methods 0.000 claims description 26
- 230000008018 melting Effects 0.000 claims description 21
- 229920001410 Microfiber Polymers 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 9
- 238000005299 abrasion Methods 0.000 claims description 6
- 229920001059 synthetic polymer Polymers 0.000 claims description 6
- 239000003658 microfiber Substances 0.000 claims description 4
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 abstract description 4
- 238000010030 laminating Methods 0.000 abstract description 3
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 abstract 1
- 239000007787 solid Substances 0.000 description 13
- 239000010802 sludge Substances 0.000 description 9
- 229920000742 Cotton Polymers 0.000 description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 239000004927 clay Substances 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000004745 nonwoven fabric Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 3
- -1 for example Polymers 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 1
- 241000581364 Clinitrachus argentatus Species 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000015429 Mirabilis expansa Nutrition 0.000 description 1
- 244000294411 Mirabilis expansa Species 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000010800 human waste Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 235000013536 miso Nutrition 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- OHQOKJPHNPUMLN-UHFFFAOYSA-N n,n'-diphenylmethanediamine Chemical compound C=1C=CC=CC=1NCNC1=CC=CC=C1 OHQOKJPHNPUMLN-UHFFFAOYSA-N 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Landscapes
- Filtering Materials (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は固液分離用濾布の製造方法に関し、ざらに詳
しくは、濾布走行式の固液弁ｍ装置に使用するのに好適
な濾布の製造方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a filter cloth for solid-liquid separation, and more specifically, a method for manufacturing a filter cloth for solid-liquid separation, and more specifically, a method for manufacturing a filter cloth for solid-liquid separation. This invention relates to a method for manufacturing filter cloth.
［従来の技術］
従来、転写ドラムと圧搾ロールとからなる圧搾部に固液
を戟ぜたエンドレスｍ布を走行させ、その圧搾部で固液
中の液成分を絞り取り、−力源布上に残ったケークを転
写ドラムに転写し、スクレーパで掻き取って回収するよ
うにした濾布走行式脱水機（ベルトプレス型脱水機）や
、圧搾することなく重力や減圧吸引力を利用して液成分
を濾過し、残った半ケーク状の成分を濾布上から回収す
るようにした濾布走行式濾過機などの固液分離装置がい
ろいろな分野で使用されている。この発明に係る濾布は
、そのような固液分離装置に使用するものである。[Prior art] Conventionally, an endless m cloth mixed with a solid liquid is run through a pressing section consisting of a transfer drum and a pressing roll, and the liquid component in the solid liquid is squeezed out by the pressing section. A filter cloth traveling type dehydrator (belt press type dehydrator) transfers the remaining cake to a transfer drum and scrapes it off with a scraper, and a filter cloth running type dehydrator (belt press type dehydrator) transfers the remaining cake to a transfer drum and collects the cake by scraping it off with a scraper. Solid-liquid separators, such as filter cloth traveling type filters, which filter components and collect the remaining half-cake components from the filter cloth are used in various fields. The filter cloth according to the present invention is used in such a solid-liquid separator.
上述したような固液分離装置に使用する濾布としては、
従来、たとえば特開昭５９−１１５７２０号公報、特開
昭６０−３１８１１号公報、特開昭６０−４４０１３号
公報、特開昭６０−４４０１４＠公報、特開昭６１−１
６４６１３号公報、特開昭６１−１７１５１６＠公報、
特開昭６１−１７／１９１２＠公報、特開昭６１−１７
４９１５号公報、特開昭６１−１７４９’１６号公報等
に記載されているようなものが知られている。この従来
の′ａ布は織物基材の表面に、その基材の主として緯糸
を起毛してなる太さ０．１〜１０μｍの極細繊維の立毛
綿層を形成したようなものである。この濾７ｊｉは、太
さ０．１〜１０μｍの極細繊維の立毛で線層を形成して
いるから立毛間の隙間が大変小さく、微細な固形成分で
も阻止できる。As the filter cloth used in the solid-liquid separator as mentioned above,
Conventionally, for example, JP-A-59-115720, JP-A-60-31811, JP-A-60-44013, JP-A-60-44014@, and JP-A-61-1
Publication No. 64613, JP-A-61-171516@publication,
JP-A-61-17/1912@Publication, JP-A-61-17
4915, Japanese Unexamined Patent Publication No. 61-1749'16, etc. are known. This conventional 'a cloth has a napped cotton layer formed on the surface of a textile base material, which is made of ultrafine fibers having a thickness of 0.1 to 10 μm and is made mainly from raised wefts of the base material. Since this filter 7ji has a linear layer formed of napped microfibers having a thickness of 0.1 to 10 μm, the gaps between the napped fibers are very small, and even fine solid components can be blocked.
また、極細繊維と低融点繊維あるいは微粒子とを混合抄
紙し、溶融一体化した後表面を起毛したものも知られて
いる。It is also known to make paper by mixing ultrafine fibers and low-melting point fibers or fine particles, melting them together, and then raising the surface.
［発明が解決しようとする問題点］
しかしながら、上記のような従来の濾布においては、以
下のような問題が残っている。[Problems to be Solved by the Invention] However, the following problems remain in the conventional filter cloth as described above.
すなわら、織物や編物基材の表面を起毛して極細繊維の
立毛層を形成する方法では、織組織ヤ編組織のために基
材表面に必然的に凹凸ができるため、この表面にむらの
ない、十分な厚みの立毛綿層を形成できるだけの起毛を
行うことか困難であった。そのため、より緻密で、より
厚みの厚い綿層形成をねらうには自づと限界がおった。In other words, in the method of raising the surface of a woven or knitted fabric substrate to form a napped layer of ultrafine fibers, unevenness is inevitably created on the surface of the substrate due to the woven or knitted structure. It was difficult to raise enough to form a napped cotton layer of sufficient thickness without any drying. Therefore, there was a limit to the ability to form a denser and thicker cotton layer.
また、前記溶融一体化した後表面を起毛する方法では、
基材の柔軟性が乏しいため、良好な起毛を行うことがで
きないとともに、濾布走行時に応力集中か起こり易り濾
イロの耐久性か乏しいという問題があった。In addition, in the method of raising the surface after melting and integrating,
Due to the poor flexibility of the base material, good napping cannot be achieved, stress concentration tends to occur when the filter cloth runs, and the durability of the filter cloth is poor.
さらに、上記厚い立毛綿層が形成困難な問題と濾布基材
の柔軟性が乏しい問題とは別に、前述の従来濾布におい
ては、固液分離装置での使用における変形（とくに伸び
）防止がまだ十分でなく、かつエンドレス濾布として装
置内を周回される際の、ガイトロール等と接触する面側
の耐久性が−Ｆ分でなく、十分な寿命が得られないとい
う問題が残っている。この問題に対しては、まだ出願未
公開の段階であるが、先に本出願人により、濾布基材と
、この濾布基材の透水性を損わない高い透水性を有する
補強布とを積層し、両者を低融点ポリマかうなるパウダ
ー状高分子物質によって接着一体化した固液分離性能Ｉ
Ｕｉが提案されている。Furthermore, apart from the above-mentioned problems of difficulty in forming a thick napped cotton layer and poor flexibility of the filter cloth base material, the above-mentioned conventional filter cloths have difficulty preventing deformation (especially elongation) when used in solid-liquid separators. It is still not sufficient, and there remains the problem that when the endless filter cloth is circulated around the device, the durability of the side that comes into contact with guide rolls, etc. is not -F, and a sufficient lifespan cannot be obtained. . Regarding this problem, although the application has not yet been published, the applicant has previously proposed a filter cloth base material and a reinforcing cloth with high water permeability that does not impair the water permeability of the filter cloth base material. solid-liquid separation performance I by laminating the two and bonding them together using a low-melting point polymer or a powdery polymer material.
Ui has been proposed.
本発明は、十分な厚みでかつ均一な極細ｗ４維立毛層を
形成できるため固液分離性能の極めて優れた、しかも柔
軟性に優れているため起毛が容易でかつ濾布用基材とし
て十分な耐久性を有するとともに、（、ＩＦせて′ｆａ
′Ｓ全体としても十分に高い耐久性を有する固液分離用
濾布の製造方法を提供することを目的とする。The present invention has extremely excellent solid-liquid separation performance because it can form a sufficiently thick and uniform ultra-fine W4 fiber nap layer, and is also easy to raise due to its excellent flexibility and is sufficient as a base material for filter cloth. In addition to being durable,
It is an object of the present invention to provide a method for producing a filter cloth for solid-liquid separation that has sufficiently high durability as a whole.
［問題点を解決するための手段］
この目的に沿う本発明の固液分離用濾布の製造方法は、
極細繊維を席としこれと溶媒溶解性を異にする合成高分
子を海とする海島型の断面構造を有する繊維を交絡させ
てフェルトに加工し、該フェルトに前記極細繊維と前記
合成高分子とは溶媒溶解性を異にするポリマーを含浸さ
せて、交絡組織を固定し、次いでフェルトを溶媒に浸漬
して前記海島型構造を有する繊維から海成分を除去し、
海成分の除去されたフェルトをポリウレタン溶液中に浸
漬じた後、水中に浸漬しフェルトに含浸されたポリウレ
タン溶液から溶媒を除去してポリウレタンを凝固させ、
次いで前記ポリマーを除去づるとともに前記ポリウレタ
ンが凝固したフェルトを乾燥し、しかる後フェルトの表
面をバフィングすることによりフェルト表面に極細繊維
を起毛し、該起毛されたフェルトに該フェルトよりも高
い透水性と耐摩耗性とを有する補強布を積層し、フェル
トと補強布との間に両者の融点よりも低融点のポリマよ
り成るパウダー状高分子物質を介在させて、該低融点ポ
リマの融点以上の加熱によりパウダー状高分子物質を溶
融することによって前記起毛されたフェルトと補強布を
接着一体化せしめる方法から成る。[Means for solving the problem] The method for producing a filter cloth for solid-liquid separation of the present invention that meets this objective is as follows:
Fibers having a sea-island cross-sectional structure in which the ultrafine fibers are the seats and the synthetic polymers having different solvent solubility are the seas are intertwined and processed into felt, and the ultrafine fibers and the synthetic polymers are mixed into the felt. is impregnated with polymers having different solvent solubility to fix the intertwined structure, and then immersing the felt in a solvent to remove the sea component from the fiber having the sea-island structure;
The felt from which the sea component has been removed is immersed in a polyurethane solution, and then immersed in water to remove the solvent from the polyurethane solution impregnated with the felt and coagulate the polyurethane.
Next, the polymer is removed and the felt in which the polyurethane has coagulated is dried, and then the surface of the felt is buffed to raise ultrafine fibers on the felt surface, and the raised felt has higher water permeability than the felt. Abrasion-resistant reinforcing fabrics are laminated, a powdery polymeric substance made of a polymer with a melting point lower than that of the felt and the reinforcing fabric is interposed between the felt and the reinforcing fabric, and the material is heated to a temperature higher than the melting point of the low-melting point polymer. This method consists of bonding and integrating the raised felt and reinforcing cloth by melting a powdery polymeric material.
上記海島型構造を有する繊維において、島成分の極細繊
維としては、ポリエステル、ポリアミド等の合成高分子
で、繊維に形成できるものであればよい。In the above-mentioned fiber having a sea-island structure, the ultrafine fibers of the island component may be any synthetic polymer such as polyester or polyamide that can be formed into fibers.
また、海成分を構成する合成高分子としては、ポリスチ
レン、加水分解するポリエステルやポリアミド等の合成
高分子で、繊維に形成できるものであればよい。海成分
は、溶媒の種類や加水分解条件を選択することによって
溶解、除去できる。The synthetic polymer constituting the sea component may be any synthetic polymer such as polystyrene, hydrolyzable polyester, or polyamide, as long as it can be formed into fibers. Sea components can be dissolved and removed by selecting the type of solvent and hydrolysis conditions.
上記極細繊維は、その太さが０．１〜１０μｍであり、
それ以上では剛直でしなやかな躍層を形成できないし、
立毛のすき間が大きく微細固形物の阻止率が悪い。０．
１μｍ以下では、立毛の摩耗が激しく安定な固液分離が
行えない。The ultrafine fiber has a thickness of 0.1 to 10 μm,
Above this, a rigid and flexible cline cannot be formed.
There are large gaps between the naps and the rejection rate of fine solids is poor. 0.
If the diameter is less than 1 μm, the naps will be severely worn and stable solid-liquid separation cannot be performed.
このような海島型構造を有する繊維が交絡されることに
より、まずフェルトが作成される。このフェルトは、繊
維が交絡されてシート状に形成されたものであるから、
前述の織組織や編組織に比べ表面の凹凸は極めて小さく
、かつ交絡組織も容易に均一なものが得られるから、均
一な多孔１が得られる。First, felt is created by intertwining fibers having such a sea-island structure. This felt is made of intertwined fibers and formed into a sheet shape.
Compared to the above-mentioned woven or knitted structures, the surface unevenness is extremely small, and the intertwined structure can also be easily uniform, so that uniform pores 1 can be obtained.
このフェルトに、上記海および島成分とは溶媒溶解性を
異にするポリマーが含浸され、該含浸により後の工程に
対し一旦交絡組織が固定される。This felt is impregnated with a polymer having a different solvent solubility from that of the sea and island components, and this impregnation temporarily fixes the intertwined structure for subsequent steps.
このポリマーとしては、たとえばＰＶＡ （ポリビニル
アルコール）が好適である。As this polymer, for example, PVA (polyvinyl alcohol) is suitable.
次いで、フェルトが溶媒に浸漬され、海島型構造を有す
る繊維から海成分が除去される。つまり、Ｄ’Ａ海する
。溶媒としては、たとえば、トリクロルエチレンが用い
られ、適切な温度範囲のトリクロルエチレンのバス中に
フェルトを浸漬することにより、脱海する。この脱海に
よっては、上記交絡組織固定用のポリマーは溶解しない
から、脱海後のフェルトは、極細繊維の交絡したものが
、付着しているポリマー（たとえばＰＶＡ）によって交
絡組織保持されたものとなる。The felt is then immersed in a solvent to remove sea components from the fibers, which have a sea-island structure. In other words, D'A sea. For example, trichlorethylene is used as the solvent, and the felt is immersed in a bath of trichlorethylene at an appropriate temperature range to remove the seawater. Since the polymer for fixing the interlaced tissue is not dissolved by this de-sea removal, the felt after de-sea is composed of entangled ultra-fine fibers with the entangled structure retained by the adhering polymer (for example, PVA). Become.
このフェルトにポリウレタンが含浸、固着される。海成
分の除去されたフェルトをポリウレタン溶液、たとえば
ポリウレタンのＤＭＦ溶液中に浸漬することにより、ポ
リウレタンが含浸され、海成分の存在していた部分がポ
リウレタンで置換される。ポリウレタンはポリエーテル
、ポリエステル、メチレンジフェニールジイソシアネー
ト、メチレンビスアニリンから得られた柔軟性の高いポ
リウレタンのジメチルフォルムアミド溶液を、濾布の央
面からグラビアコーターで塗布またはポリウレタン水系
エマルジョンとして塗布してもよい。This felt is impregnated and fixed with polyurethane. By immersing the felt from which the sea component has been removed into a polyurethane solution, such as a DMF solution of polyurethane, the polyurethane is impregnated and the areas where the sea component was present are replaced by polyurethane. Polyurethane can be applied by applying a dimethylformamide solution of highly flexible polyurethane obtained from polyether, polyester, methylene diphenyl diisocyanate, or methylene bisaniline from the center of the filter cloth using a gravure coater or by applying it as a polyurethane aqueous emulsion. good.
次いでフェルトを水中に浸漬することにより、ポリウレ
タンが凝固されるとともに、ポリウレタン溶液中の溶媒
が洗い流されて除去される。ポリウレタンの凝固により
、交絡している極細繊維がポリウレタンで再固定される
。The felt is then immersed in water to coagulate the polyurethane and wash away the solvent in the polyurethane solution. Coagulation of the polyurethane re-fixes the intertwined microfibers with the polyurethane.
次いで、フェルトから前記交絡組織固定用のポリマーが
除去され、フェルトが乾燥される。ポリマーがＰＶＡで
ある場合には、上記水中への浸漬により、同時にＰＶＡ
が洗いとられるため、これを除去するための特別な溶媒
は不要である。The entangled tissue fixing polymer is then removed from the felt and the felt is dried. When the polymer is PVA, the PVA is simultaneously immersed in water.
is washed away, so no special solvent is required to remove it.
乾燥されたフェルトは、その表面がバフィングされるこ
とにより起毛される。バフィングは、サンドペーパを用
いて行うことが好ましい。起毛を、たとえば針布等によ
る起毛機を用いて行うことも考えられるが、サンドペー
パ処理程には均一な起毛を行えない。The dried felt is raised by buffing its surface. Buffing is preferably performed using sandpaper. It is conceivable to perform the raising using a cloth raising machine, for example, but it is not possible to raise the cloth as uniformly as with sandpaper treatment.
この起毛においては、基材が、ポリウレタンが含浸、固
着された極細繊維からなるフェルトであるため、表面の
凹凸が極めて小さく平滑であるので、むらのない均一な
起毛が可能であり、したがって従来濾布に比べより緻密
な立毛組織でかつ厚みの厚い立毛ｔｒｉの形成が可能に
なる。In this raising method, the base material is felt made of ultra-fine fibers impregnated and fixed with polyurethane, so the surface irregularities are extremely small and smooth, so even and uniform raising is possible. It is possible to form a thicker nape tri with a denser nape structure compared to cloth.
また、ポリウレタンで内部固定された基材であるから、
十分な柔軟性を有しており、起毛が極めて行い易く、し
かも完成した濾布が柔軟に所定の走行軌跡に沿うため、
使用時に応力集中が起こりにくく、濾布の耐久性が向上
される。In addition, since the base material is internally fixed with polyurethane,
It has sufficient flexibility, making it extremely easy to nap, and the completed filter cloth flexibly follows a predetermined travel trajectory.
Stress concentration is less likely to occur during use, and the durability of the filter cloth is improved.
なお、上記乾燥後のフェルトの厚みが厚い場合には、フ
ェルトを厚み方向に半分に切って薄クシ、表面側はバフ
ィングにより起毛し、裏面側はバフィングにより主とし
てとびだしたウレタンを除去する゛ようにしてもよい。In addition, if the felt is thick after drying, cut the felt in half in the thickness direction and comb it thinly, buffing the front side to raise the fluff, and buffing the back side to mainly remove the protruding urethane. It's okay.
つぎに、上記のようにして得られた、十分な綿層厚みを
有し柔軟性に優れたフェルトに、補強１５が積層されて
、接着一体化される。Next, the reinforcement 15 is laminated onto the felt having a sufficient cotton layer thickness and excellent flexibility, which is obtained as described above, and is bonded and integrated.
補強イ［は、上記起毛されたフェルトよりも高い透水性
と耐摩耗性とを有しているものである。高い透水性によ
り、補強布を積層することによっては、フェルトが有す
る透水性はほとんど損なわれない。また、高い耐摩耗性
により、使用に際してとくに補強布を装置のがイドロー
ラ等側に位置させるよう濾布をｇ＠した場合に、補強布
の高い耐摩耗性が直接発揮され、濾布としての耐久性が
向上される。Reinforcement A has higher water permeability and abrasion resistance than the raised felt. Due to its high water permeability, the water permeability of felt is hardly impaired by laminating reinforcing fabrics. In addition, due to its high abrasion resistance, the high abrasion resistance of the reinforcing cloth is directly demonstrated when using it, especially when the filter cloth is placed on the side of the device such as the idle roller, etc., and the durability of the reinforcing cloth is directly demonstrated. performance is improved.
このような特性を有する補強布としては、織物又は編物
から成り、その構成糸としては、天然繊維、合成繊維な
どの紡績糸、フィラメント糸等を使用することができる
が、朱子織悔との接着性、耐１１耗性等の点から紡績糸
が好ましい。また、該補強布の組織としては、経緯糸と
も紡績糸使いの平織物の紗、経糸フィラメント糸・緯糸
紡績糸使いの平織物、紡績糸を緯入れしたトリコット等
を用いることができる。The reinforcing fabric with such characteristics is made of woven or knitted fabric, and its constituent yarns can be spun yarns such as natural fibers and synthetic fibers, filament yarns, etc. Spun yarn is preferable from the viewpoint of durability, abrasion resistance, etc. Further, as the structure of the reinforcing cloth, plain woven gauze using spun yarns for both the warp and warp, plain woven fabric using spun yarns for warp and filament yarns and weft, tricot with spun yarn inserted, etc. can be used.
接着一体化は次のように行われる。Adhesive integration is performed as follows.
すなわら、フェルトと補強イ［との間に低融点ポリマか
ら成るパウダー状高分子物質を点状に介在させ、該低融
点ポリマの融点以上に加熱して溶融接着することにより
良好な接着性が得られると共に、フェルトと補強布の接
着点が点在化した状態にすることができ、立毛層を有す
るフェルト側の濾過性能を損うことなく透水性の優れた
濾過性能を維持できるものである。In other words, good adhesion is achieved by interposing a powdery polymeric material made of a low melting point polymer between the felt and the reinforcing material in the form of dots, and melting and bonding by heating the material to a temperature higher than the melting point of the low melting point polymer. In addition to this, the bonding points between the felt and the reinforcing cloth can be scattered, and the filtration performance with excellent water permeability can be maintained without impairing the filtration performance of the felt side having a napped layer. be.
第１図はこの発明の濾布の一例を示ず慨略斜視図であり
、この発明の濾布１は、図に示すように起毛されたフェ
ルト１ａと補強イ５１ｂとが重ね合わされて接着される
ことによって一体化されている。FIG. 1 is a schematic perspective view, not showing an example of the filter cloth of the present invention, and the filter cloth 1 of the present invention is made by overlapping and bonding a raised felt 1a and a reinforcing layer 51b as shown in the figure. It is unified by
従って、この発明の濾布は、フェルト側は濾過性能およ
び柔軟性のみを、一方補強布は耐久性のみを維持すれば
よく、フェルト側と補強布とを別々に最適化できるので
、濾過性能、耐久性に優れた濾布とすることができるも
のである。Therefore, in the filter cloth of the present invention, the felt side only needs to maintain filtration performance and flexibility, while the reinforcing fabric only needs to maintain durability.Since the felt side and the reinforcing fabric can be optimized separately, filtration performance and flexibility can be maintained. It is possible to obtain a filter cloth with excellent durability.
上記のフェルトと補強布との接着一体化は、具体的には
、たとえば第２図および第３図に示すように行われる。Specifically, the felt and the reinforcing cloth are bonded together as shown in FIGS. 2 and 3, for example.
第２図は、補強布１ｂの上に低融点ポリマより成るパウ
ダー状高分子物質２をグラビアロー５３を介して点在さ
せながら、ヒートボックス４内に該補強布を供する状態
を示している。該ヒートボックス４は、低融点ポリマの
融点以上に加熱するものでおり、パウダー状高分子物質
２が溶融して補強午面上に融着固定されることとなる。FIG. 2 shows a state in which the reinforcing cloth 1b is provided in the heat box 4 while the powdered polymer substance 2 made of a low melting point polymer is scattered on the reinforcing cloth 1b via a gravure arrow 53. The heat box 4 heats the low melting point polymer to a temperature higher than the melting point, and the powdered polymer substance 2 is melted and fused and fixed on the reinforcing surface.
第３図は、前記で得られた補強布１ｂの、パウダー状高
分子物質２が融着固定された面側と、フェルト１日の反
立毛面とが重なるように合わせて、該フェルト１ａの立
毛部側かカレンダローラ５の而に位置するように供給す
る状態を示している。FIG. 3 shows the reinforcing cloth 1b obtained above, with the felt 1a being aligned so that the side on which the powdered polymeric substance 2 is fused and fixed overlaps with the non-raised side of the felt 1a. A state in which the paper is supplied so that it is located on the napping part side or next to the calender roller 5 is shown.
該カレンダローラ５は、グラビアローラ３（鉄製ローラ
の表面に密着した樹脂部に凹部を有するローラ等）とス
チール製の加熱ローラ５より構成されており、供給され
たフェルトと補強布のうらフェルトはヒートボックス６
で予熱されｌ；スから、補強布は直接、低融点ポリマの
融点以上に加熱したカレンダローラ３で加圧加熱され、
パウダー状高分子物質２が溶融することによってフェル
ト１ａと補強布１ｂとが接着一体化され、この発明の濾
布が得られるものである。The calendar roller 5 is composed of a gravure roller 3 (such as a roller having a concave portion in a resin portion that is in close contact with the surface of an iron roller) and a steel heating roller 5, and the supplied felt and the back felt of the reinforcing cloth are heat box 6
The reinforcing fabric is directly heated under pressure with a calender roller 3 heated above the melting point of the low melting point polymer.
By melting the powdery polymeric substance 2, the felt 1a and the reinforcing cloth 1b are bonded and integrated, thereby obtaining the filter cloth of the present invention.
また、この発明の濾布は、フェルト１ａの反立毛面側に
低融点ポリマのパウダー状高分子物質２を融着固定した
後に、該フェルト１ａと補強布１ｂを重ね合せてカレン
ダローラ３に供給して加圧加熱し、接着して製造するこ
ともできる。Further, in the filter cloth of the present invention, after a powdery polymeric substance 2 of a low melting point polymer is fused and fixed to the non-napped side of the felt 1a, the felt 1a and the reinforcing cloth 1b are overlapped and fed to the calender roller 3. It can also be manufactured by pressurizing, heating, and bonding.
また、この発明の濾布は、フェルト１ａと補強布１ｂと
の間に、低融点ポリマのパウダー状高分子物質２を点在
させながら、カレンダローラ３に供給してｈ０圧加熱し
接着一体化することを連続的に一工程で行って製造する
こともできる。In addition, the filter cloth of the present invention is manufactured by interspersing the felt 1a and the reinforcing cloth 1b with a powdery polymer substance 2 made of a low melting point polymer, which is then supplied to a calender roller 3, heated under h0 pressure, and bonded and integrated. It can also be manufactured by continuously performing this in one step.
つぎに、この発明のより具体的な実施例について説明す
る。Next, more specific embodiments of the present invention will be described.
（実施例１）
ポリエステルを島成分とし、ポリスチレンを海成分とす
る１８芯の多芯複合繊維をフェルト加工し、そのフェル
トをニードルパンチで形態固定化し、厚さ１．０ｍｍの
フェルト得た。次に、このフェルトをＰＶＡの水溶液に
浸漬したのらマングルで搾り、乾燥したのら、トリクロ
ルエチレンを溶媒として上記ポリスチレンの海成分を取
り除いた。次にポリウレタンのジメヂルフォルムアミド
（ＤＭＦ＞溶液に浸漬したのら、マングルで搾り、水槽
でポリウレタンを凝固させると同時にＰＶＡとＤＭＦを
取り除いた。さらに乾燥して極細繊維からなるフェルト
を得た。このフェルトを厚さ方向に半分にスライスして
２枚のシートを形成し、それぞれの厚さ半分のシートの
一面を軽くサンドペーパーによるパフ仕上げし、他面に
対しては十分な立毛が得られるまでバフィングを行なっ
た。(Example 1) An 18-core multicore composite fiber containing polyester as an island component and polystyrene as a sea component was processed into felt, and the shape of the felt was fixed by needle punching to obtain a felt with a thickness of 1.0 mm. Next, this felt was soaked in an aqueous solution of PVA, squeezed with a mangle, dried, and the sea component of the polystyrene was removed using trichlorethylene as a solvent. Next, the polyurethane was immersed in a solution of dimedyl formamide (DMF), squeezed with a mangle, and the polyurethane was coagulated in a water bath, at the same time PVA and DMF were removed.Furthermore, it was dried to obtain a felt made of ultrafine fibers. Slice this felt in half in the thickness direction to form two sheets, lightly puff finish one side of each half-thick sheet with sandpaper, and obtain sufficient nap on the other side. Buffing was performed until
上記工程により厚さ０．５ｍの起毛不織布を得た。A raised nonwoven fabric with a thickness of 0.5 m was obtained through the above steps.
上記不織布製造各工程において、−好ましい条件の範囲
を表−１に示す。Table 1 shows the range of preferred conditions in each of the above nonwoven fabric manufacturing steps.
表−１
次に、補強布として経糸、緯糸に綿番手３０番のポリエ
ステル高強力紡績糸を用いた経糸密度２４本／ｉｎｘ緯
糸密度２２本／ｉｎの平織物を準備した。Table 1 Next, as a reinforcing cloth, a plain woven fabric with a warp density of 24 threads/in and a weft density of 22 threads/in was prepared using polyester high-strength spun yarn with a cotton count of 30 for the warp and weft.
次に、上記補強布部上に融点１３０℃のポリエチレン接
着剤（粉）の目付３０ｇ／ｍに相当する量を、グラビア
ローラを介して９００個／ｉｎ２の密度で付与し、ヒー
トボックス内で１４０℃に加熱し補強布に融着固定した
。Next, an amount of polyethylene adhesive (powder) with a melting point of 130°C, equivalent to a basis weight of 30 g/m, was applied onto the reinforcing fabric portion at a density of 900 pieces/in2 via a gravure roller, and 140 pieces/in2 of It was heated to ℃ and fused and fixed to the reinforcing cloth.
次に、前記起毛不織布（フェルト）と前記加工された補
強布とをΦね合せ、立毛部分がカレンダーローラ面側に
位置するように加熱カレンダー機に供給し、補強布部の
ポリエチレン接着剤を溶融させることで起毛不織布と接
着合体してこの発明の濾布を得た。Next, the raised nonwoven fabric (felt) and the processed reinforcing cloth are Φ-bonded together and fed to a heating calendar machine so that the raised part is located on the calender roller surface side, and the polyethylene adhesive on the reinforcing cloth part is melted. By doing so, the filter cloth of the present invention was obtained by adhesion and bonding with the raised nonwoven fabric.
次に、この発明の濾布の固液分離装置における使用上の
性能を確認するために、上記濾布をその経糸方向を長手
方向として幅３０ｃｒｒｔ、長さ２．５ ｍに裁断し、
裁断端を縫合して第４図に示すようなエンドレス濾布１
を得た。エンドレス濾布１の幅方向両端には孔３付ベル
ト２を縫合して、濾布１の走行駆動または走行時におけ
る左右の位相合せが行えるようにした。Next, in order to confirm the performance of the filter cloth of the present invention in use in a solid-liquid separation device, the filter cloth was cut into a width of 30 crrt and a length of 2.5 m with the warp direction as the longitudinal direction.
The cut ends are sewn together to form an endless filter cloth 1 as shown in Figure 4.
I got it. Belts 2 with holes 3 are sewn to both ends of the endless filter cloth 1 in the width direction, so that the filter cloth 1 can be driven to run or the left and right phases can be aligned during running.
次に、上記エンドレス濾布を第５図に示づベルトプレス
型脱水機１１にかけ、ｍ＊１の走行速度を４ｍ／分、減
圧吸引槽２１の減圧度を約９００ｍ水柱、転写ドラム１
９への押付力を約６０Ｋｇとして脱水試験をした。図の
装置１１において、濾／ｆｉ１は、駆動ロール１２と、
ガイドロール１３．１４．１５間に緊張状態で張設され
、これらロール１２．１３．１４．１５と、圧搾ロール
１６．１７．１８、転写ドラム１９によって規制される
一定の軌道上を矢印Ａの方向に走行、周回する。２０が
処理されるべき固液であり、減圧吸引槽２１により、走
行中の濾布１を通して液体成分が吸引され、固形成分が
１ＦＪＩ布１上に残され、濾過される。固形成分は圧搾
ロール１６．１７．１８で転写ドラム１９上に圧搾され
、それがスクレーパ２２によってかき取られる。Next, the endless filter cloth was applied to the belt press type dehydrator 11 shown in FIG.
A dehydration test was conducted with a pressing force of about 60 kg. In the illustrated apparatus 11, the filter/fi1 includes a drive roll 12,
The guide rolls 13, 14, 15 are stretched under tension, and the trajectory indicated by arrow A is regulated by these rolls 12, 13, 14, 15, the squeeze roll 16, 17, 18, and the transfer drum 19. Run in the direction and go around. 20 is a solid liquid to be treated, and a liquid component is sucked through the running filter cloth 1 by a vacuum suction tank 21, and the solid component is left on the 1FJI cloth 1 and filtered. The solid components are squeezed onto the transfer drum 19 by squeeze rolls 16, 17, 18 and scraped off by the scraper 22.
固液としては、水通水と平均粒径が約２０μｍの粘土と
を使用し、粘土の濃度が約３００ ｍｙ／ ｆ！になる
ように調整したものを、凝集剤を添加しないで約８０Ａ
／分て供給した。コールタ−カウンタで測定した上記固
液中にａ３ける粘土の粒度分布は、約１〜５０μｍで、
かなり、広い範囲に分布していた。As the solid liquid, water passing through and clay with an average particle size of about 20 μm were used, and the concentration of the clay was about 300 my/f! Approximately 80A without adding flocculant
/min. The particle size distribution of clay in A3 in the solid liquid measured with a Coulter counter is about 1 to 50 μm,
It was distributed over a fairly wide range.
試験の結果、濾布１による阻止率は９９％、スクレーパ
２２で掻き取って回収した成分は約５０％が固形分であ
った。また、転写ドラム１９への転写率は約９０％であ
り、極めて高かった。さらに、コールタ−カウンタで測
定した固形成分中の粘土の粒度分布は約１〜５μｍであ
り、５μＴｒｔを越えるものはほとんど除去されていた
。また、約２０００時間運転後においても上記性能は全
く変わらず、濾布の変形などの巽状も認められず、長期
間の寸法安定性を有するとともに、顕著な耐久性を有す
るものであった。As a result of the test, the rejection rate by the filter cloth 1 was 99%, and the components recovered by scraping with the scraper 22 were about 50% solids. Further, the transfer rate to the transfer drum 19 was approximately 90%, which was extremely high. Furthermore, the particle size distribution of clay in the solid component measured with a Coulter counter was about 1 to 5 μm, and most of the clay exceeding 5 μTrt was removed. Further, even after approximately 2,000 hours of operation, the above-mentioned performance did not change at all, and no deformation of the filter cloth was observed, indicating long-term dimensional stability and remarkable durability.
なお、この発明に係る方法により得られた濾布は、均一
でかつ立毛量の多い極細繊維立毛線層を有しているので
、固液分離効率が高く、かつウレタン含浸、固着により
柔軟性に優れているので、走行安定性が高く、操作性に
優れており、しかも補強布との接着一体化により濾布の
耐久性が極めて高いため処理能力が安定している。その
ためいろいろな固液分離に供することかできる。たとえ
ば、活性汚泥処理装置から排出される、いわゆる懸濁系
の汚泥や、生物膜処理装置から排出される、いわゆる固
着系の汚泥など、廃水処理によって生ずる汚泥、スカム
、フロック、洗浄水、濃縮スラッジなどの濃縮、脱水を
行うのに使用することができる。具体的には、土石水処
理によって生ずる汚泥、浄化槽から発生する余剰汚泥、
し尿処理から発生する汚泥、加圧浮上操作から生ずるス
カム、産業廃水の処理によって生ずる凝集フロックや凝
集沈澱フロック、砂濾過装置などの各種濾過装置の逆洗
水、スクリーン装置で凝縮したスラッジなどがある。ま
た、たとえば紙パルプ製造業、食品製造業、酒造業、味
噌などの醸造業など、各種製造業において固形成分を回
収するのに使用することができる。さらに、池や川を浄
化したり、浄水場における除藻、しゅんせつ時における
河川や湖沼の汚れ防止に使用することができる。The filter fabric obtained by the method according to the present invention has a layer of ultrafine fibers that are uniform and have a large amount of naps, so it has high solid-liquid separation efficiency and is flexible due to urethane impregnation and fixation. Because of its excellent properties, it has high running stability and excellent operability.Furthermore, the durability of the filter cloth is extremely high due to the adhesive integration with the reinforcing cloth, resulting in stable processing capacity. Therefore, it can be used for various solid-liquid separations. For example, sludge, scum, flocs, wash water, and concentrated sludge generated during wastewater treatment, such as suspended sludge discharged from activated sludge treatment equipment and so-called fixed sludge discharged from biofilm treatment equipment. It can be used for concentration, dehydration, etc. Specifically, sludge generated from debris water treatment, excess sludge generated from septic tanks,
These include sludge generated from human waste treatment, scum generated from pressure flotation operations, coagulated flocs and coagulated sediment flocs generated from industrial wastewater treatment, backwash water from various filtration devices such as sand filters, and sludge condensed in screen devices. . Furthermore, it can be used to recover solid components in various manufacturing industries, such as paper pulp manufacturing, food manufacturing, sake brewing, and miso brewing. Furthermore, it can be used to purify ponds and rivers, remove algae at water purification plants, and prevent rivers and lakes from becoming contaminated during dredging.
［発明の効果］
この発明に係る方法においては、平滑な表面を有するフ
ェルトを起毛して立毛連層を形成するので、起毛が行い
やすくなるとともに、極めて緻密で均一な極細繊維の立
毛連層を形成でき、しかも十分な厚みを有する′ａ層を
形成できる。そのため固形成分阻止率の高い極めて高性
能な固液分離性能を有する濾布をＩＪることかできる。[Effects of the Invention] In the method according to the present invention, since the felt having a smooth surface is raised to form a raised continuous layer, it is easy to raise the felt, and it is possible to form a raised continuous layer of extremely dense and uniform microfibers. In addition, it is possible to form a layer 'a' having a sufficient thickness. Therefore, it is possible to produce a filter cloth having extremely high solid-liquid separation performance with a high solid component rejection rate.
また、極細繊維の交絡組織中にポリウレタンを含浸、固
着させているが゛、極めて柔軟性に優れており、所望の
走行路に容易に沿うことができる濾布が得られる。した
がって、濾布に応力集中も起こりにくく、濾布基材の耐
久性を向上でき、長期間安定な処理性能を維持できる。Furthermore, since polyurethane is impregnated and fixed in the intertwined structure of ultrafine fibers, a filter cloth that has extremely excellent flexibility and can easily follow a desired running path can be obtained. Therefore, stress concentration on the filter cloth is less likely to occur, the durability of the filter cloth base material can be improved, and stable processing performance can be maintained for a long period of time.
さらに、濾布基材となる上記フェルトと補強布とを点状
低融点ポリマーにより接着一体化しているので、濾布の
透水性を損うことなく、補強布により、濾布全体の変形
や伸びも防止できるから、耐久性に極めて優れた濾布が
得られ、長期間にわたって固液分離装置における濾布の
安定した走行を得ることができ、装置の操作が容易にな
るとともに、処理性能を安定化することができる。Furthermore, since the felt, which serves as the filter cloth base material, and the reinforcing cloth are bonded together using a dotted low-melting point polymer, the reinforcing cloth prevents deformation and elongation of the entire filter cloth, without impairing the water permeability of the filter cloth. This makes it possible to obtain a filter cloth with extremely excellent durability, which allows stable running of the filter cloth in solid-liquid separation equipment over a long period of time, making it easier to operate the equipment, and stabilizing processing performance. can be converted into
第１図はこの発明の方法による濾布の概略斜視図、
第２図および第３図はこの発明を実施して綿布をｉ！ｊ
造している状態を示づ概略側面図、第４図はこの発明の
方法により得られた濾ｔ５の一実施態様を示す概略斜視
図、
第５図はこの発明に係るｉｔ！布を使用したベルトプレ
ス型脱水機の概略側面図である。
１・・・・・・・・・・・・濾布
１ａ・・・・・・・・・起毛されたフェルト１ｂ・・・
・・・・・・補強布FIG. 1 is a schematic perspective view of a filter cloth according to the method of the present invention, and FIGS. 2 and 3 show a cotton cloth produced by implementing the present invention. j
FIG. 4 is a schematic perspective view showing an embodiment of the filter t5 obtained by the method of the present invention, and FIG. 5 is a schematic side view showing the state in which it is being manufactured. FIG. 1 is a schematic side view of a belt press type dehydrator using cloth. 1...Filter cloth 1a...Napped felt 1b...
・・・・・・Reinforcement cloth
Claims (1)
子を海とする海島型の断面構造を有する繊維を交絡させ
てフェルトに加工し、該フェルトに前記極細繊維と前記
合成高分子とは溶媒溶解性を異にするポリマーを含浸さ
せて、交絡組織を固定し、次いでフェルトを溶媒に浸漬
して前記海島型構造を有する繊維から海成分を除去し、
海成分の除去されたフェルトをポリウレタン溶液中に浸
漬した後、水中に浸漬しフェルトに含浸されたポリウレ
タン溶液から溶媒を除去してポリウレタンを凝固させ、
次いで前記ポリマーを除去するとともに前記ポリウレタ
ンが凝固したフェルトを乾燥し、しかる後フェルトの表
面をバフィングすることによりフェルト表面に極細繊維
を起毛し、該起毛されたフェルトに該フェルトよりも高
い透水性と耐摩耗性とを有する補強布を積層し、フェル
トと補強布との間に両者の融点よりも低融点のポリマよ
り成るパウダー状高分子物質を介在させて、該低融点ポ
リマの融点以上の加熱によりパウダー状高分子物質を溶
融することによって前記起毛されたフェルトと補強布を
接着一体化せしめることを特徴とする固液分離用濾布の
製造方法。Fibers having a sea-island cross-sectional structure in which the microfibers are islands and the synthetic polymers having different solvent solubility are the seas are intertwined and processed into felt. is impregnated with polymers having different solvent solubility to fix the intertwined structure, and then immersing the felt in a solvent to remove the sea component from the fiber having the sea-island structure;
The felt from which the sea component has been removed is immersed in a polyurethane solution, and then immersed in water to remove the solvent from the polyurethane solution impregnated with the felt and coagulate the polyurethane.
Next, the polymer is removed and the felt in which the polyurethane has coagulated is dried, and then the surface of the felt is buffed to raise ultrafine fibers on the felt surface, and the raised felt has higher water permeability than the felt. Abrasion-resistant reinforcing fabrics are laminated, a powdery polymeric substance made of a polymer with a melting point lower than that of the felt and the reinforcing fabric is interposed between the felt and the reinforcing fabric, and the material is heated to a temperature higher than the melting point of the low-melting point polymer. A method for manufacturing a filter cloth for solid-liquid separation, characterized in that the raised felt and reinforcing cloth are bonded and integrated by melting a powdery polymeric substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15687A JPS63171613A (en) | 1987-01-06 | 1987-01-06 | Production of filter cloth for solid-liquid separation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15687A JPS63171613A (en) | 1987-01-06 | 1987-01-06 | Production of filter cloth for solid-liquid separation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63171613A true JPS63171613A (en) | 1988-07-15 |
Family
ID=11466178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15687A Pending JPS63171613A (en) | 1987-01-06 | 1987-01-06 | Production of filter cloth for solid-liquid separation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63171613A (en) |
-
1987
- 1987-01-06 JP JP15687A patent/JPS63171613A/en active Pending
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