NL9400594A - Filter cloth fabric - Google Patents

Filter cloth fabric Download PDF

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Publication number
NL9400594A
NL9400594A NL9400594A NL9400594A NL9400594A NL 9400594 A NL9400594 A NL 9400594A NL 9400594 A NL9400594 A NL 9400594A NL 9400594 A NL9400594 A NL 9400594A NL 9400594 A NL9400594 A NL 9400594A
Authority
NL
Netherlands
Prior art keywords
fabric
filaments
filter
filter cloth
fibers
Prior art date
Application number
NL9400594A
Other languages
Dutch (nl)
Inventor
Marcellus Franciscus Mari Beek
Gerhardus Hermanus Ter Beek
Original Assignee
Hand Safe Holland Bv
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hand Safe Holland Bv filed Critical Hand Safe Holland Bv
Priority to NL9400594A priority Critical patent/NL9400594A/en
Priority to NL9401746A priority patent/NL9401746A/en
Priority to AU21495/95A priority patent/AU2149595A/en
Priority to EP95914577A priority patent/EP0758262A1/en
Priority to PCT/NL1995/000136 priority patent/WO1995028216A1/en
Publication of NL9400594A publication Critical patent/NL9400594A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
    • B01D39/083—Filter cloth, i.e. woven, knitted or interlaced material of organic material
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/12—Filter presses, i.e. of the plate or plate and frame type
    • B01D25/176—Filter presses, i.e. of the plate or plate and frame type attaching the filter element to the filter press plates, e.g. around the central feed hole in the plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1216—Pore size
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
    • D10B2321/021—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polyethylene
    • D10B2321/0211—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polyethylene high-strength or high-molecular-weight polyethylene, e.g. ultra-high molecular weight polyethylene [UHMWPE]

Abstract

The present invention relates to the field of filter cloths. For example, in preparing abrasive pastes and the like it is necessary for the compound consisting of (abrasive) granules to be removed from a liquid or viscous composition by said composition being passed under pressure through a filter unit, for example a so-called "plate filter", which comprises at least one filter cloth. This filter cloth is subjected to a pressure load by the composition being forcibly passed through, tensile forces arising in the cloth as a result. For that reason, use is made for this type of application of fabrics whose threads/yarns are able to withstand tensile loads. Furthermore, the fabric must be very well able to withstand the heavy mechanical impact arising from the granules, some of which are retained and some of which pass through. The invention provides a fabric for use as a filter cloth, said fabric being composed of polyethylene comprising filaments/fibres having a parallel orientation of at least 80%.

Description

Filterdoek-veefselFilter cloth fabric

De uitvinding ligt op het terrein van filterdoeken. Bijvoorbeeld voor de vervaardiging van slijppasta's en dergelijke moet de uit (slijp)korrels bestaande massa uit een vloeibare of viskeus-vloeibare massa worden verwijderd door deze massa met druk door te leiden door een filtereenheid, bijvoorbeeld een zogenaamd "platenfilter", die ten minste één filterdoek omvat. Dit filterdoek wordt door het met kracht doorleiden van de massa op druk belast, waardoor in het doek trekkrachten optreden. Om die reden wordt voor dit soort toepassingen van weefsels gebruik gemaakt, waarvan de draden/garens op trek belastbaar zijn. Verder moet het weefsel zeer goed bestand zijn tegen de zware mechanische beïnvloeding door de ten dele tegengehouden en ten dele doorgelaten korrels.The invention is in the field of filter cloths. For example, for the production of grinding pastes and the like, the (grinding) granule mass must be removed from a liquid or viscous liquid mass by passing this mass under pressure through a filter unit, for example a so-called "plate filter", containing at least one filter cloth. This filter cloth is pressurized by force through the mass, so that tensile forces occur in the cloth. For this reason, use is made of fabrics of this type, for which the threads / yarns are tensile resistant. Furthermore, the fabric must be highly resistant to the heavy mechanical influence of the partially retained and partially passed granules.

Tot heden is het niet gelukt, een weefsel te ontwerpen, dat in voldoende mate bestand is tegen de optredende krachten. Bij een te grote rekbaarheid van de toegepaste weefsels kan niet voorkomen worden, dat de door de weefseldraden bepaalde poriën groter worden, naarmate de door het medium op het doek uitgeoefende drukkracht toeneemt. Voor filtreerdoeleinden is dit zeer ongewenst, daar het vereist is, dat de poriën-grootte binnen relatief nauwe grenzen beheerst is.It has hitherto not been possible to design a fabric which is sufficiently resistant to the forces occurring. If the fabrics used are too stretchable, it cannot be prevented that the pores determined by the fabric threads increase as the pressure force exerted by the medium on the fabric increases. This is very undesirable for filtering purposes since it is required that the pore size be controlled within relatively narrow limits.

Verder zijn de filterdoeken volgens de stand der techniek onvoldoende slijtage-bestendig.Furthermore, the filter cloths according to the prior art are insufficiently wear resistant.

De bestaande filters lijden derhalve aan een bij gebruik toenemend capaciteitsverlies, een zeker materiaalverlies als gevolg van de onbedoelde doorlating van tegen te houden vaste stof, waardoor vervolgens een milieuprobleem kan optreden, daar het filtraat nog deeltjes bevat met afmetingen boven de norm.The existing filters therefore suffer from an increasing loss of capacity during use, a certain loss of material as a result of the unintentional transmission of solid material to be retained, which can subsequently cause an environmental problem, since the filtrate still contains particles with dimensions above the standard.

De uitvinding beoogt, een oplossing te bieden voor de genoemde problemen volgens de stand der techniek en verschaft daartoe een weefsel ten gebruike als filterdoek, welk weefsel is samengesteld uit polyetheen met filamenten/vezels met een parallelle oriëntatie van ten minste 80%. De conclusies 2, 3 en 4 geven toenemende gradaties van voorkeur.The object of the invention is to provide a solution to the aforementioned problems according to the prior art and for this purpose provides a fabric for use as a filter cloth, which fabric is composed of polyethylene with filaments / fibers with a parallel orientation of at least 80%. Claims 2, 3 and 4 give increasing degrees of preference.

Verder verschaft de uitvinding een weefsel van het genoemde type waarin de kristallisatiegraad van het polyetheen van de filamenten/vezels ten minste 60% bedraagt.The invention further provides a fabric of said type in which the degree of crystallization of the polyethylene of the filaments / fibers is at least 60%.

De conclusies 6, 7 en 8 geven gradaties van toenemende voorkeur.Claims 6, 7 and 8 give increasing degrees of preference.

Om de poriën-grootte zo goed mogelijk te kunnen beheersen verdient die uitvoering de voorkeur waarin ketting en inslag gelijk zijn.In order to be able to control the pore size as well as possible, that embodiment is preferred in which warp and weft are equal.

In het bijzonder kan het weefsel van het type met platte binding zijn.In particular, the fabric may be of flat bond type.

Bekend zijn weefsels ten gebruike als filterdoek, waarin de afmetingen van de poriën bijvoorbeeld 10 x 160 μπι bedragen.Tissues for use as filter cloth are known, in which the dimensions of the pores are, for example, 10 x 160 μπι.

In een bepaalde uitvoering vertoont het weefsel volgens de uitvinding de bijzonderheid dat de weefseldraden poriën bepalen met afmetingen van maximaal in de orde van 20 x 20 jum. De conclusies 12, 13 en 14 geven gradaties van toenemende voorkeur.In a particular embodiment, the fabric according to the invention has the special feature that the fabric threads define pores with dimensions of a maximum of the order of 20 x 20 µm. Claims 12, 13 and 14 give increasing degrees of preference.

Tenslotte heeft de uitvinding tevens betrekking op het gebruik van filamenten/vezels van het type Dyneema (merk van de Nederlandse onderneming DSM) voor het hiervoor omschreven weefsel volgens de uitvinding.Finally, the invention also relates to the use of filaments / fibers of the type Dyneema (brand of the Dutch company DSM) for the above-described fabric according to the invention.

Het weefsel volgens de uitvinding zal in het algemeen zeer fijnmazig zijn en zijn gebaseerd op overstrekte filamenten/vezels. De verstrekking van de filamenten/vezels zal bij voorkeur zo ver gaan, dat er in hoofdzaak geen amorfe gedeelten meer in voorkomen.The fabric of the invention will generally be very fine-meshed and based on stretched filaments / fibers. The stretching of the filaments / fibers will preferably go so far that there are essentially no more amorphous parts in them.

Claims (15)

1. Weefsel ten gebruike als filterdoek, welk weefsel is samengesteld uit polyetheen met filamenten/vezels met een parallelle oriëntatie van ten minste 80%.1. Fabric for use as a filter cloth, which fabric is composed of polyethylene with filaments / fibers with a parallel orientation of at least 80%. 2. Weefsel volgens conclusie 1, waarin de parallelle oriëntatie ten minste 85% bedraagt.The fabric of claim 1, wherein the parallel orientation is at least 85%. 3. Weefsel volgens conclusie 1, waarin de parallelle oriëntatie ten minste 90% bedraagt.The fabric of claim 1, wherein the parallel orientation is at least 90%. 4. Weefsel volgens conclusie 1, waarin de parallelle oriëntatie ten minste 95% bedraagt.The fabric of claim 1, wherein the parallel orientation is at least 95%. 5. Weefsel volgens conclusie 1, waarin de kristallisatiegraad van het polyetheen van de filamenten/vezels ten minste 60% bedraagt.The fabric of claim 1, wherein the crystallization degree of the polyethylene of the filaments / fibers is at least 60%. 6. Weefsel volgens conclusie 5, waarin de kristallisatiegraad van de filamenten/vezels ten minste 70% bedraagt.The fabric according to claim 5, wherein the degree of crystallization of the filaments / fibers is at least 70%. 7. Weefsel volgens conclusie 5, waarin de kristallisatiegraad van de filamenten/vezels ten minste 80% bedraagt.The fabric according to claim 5, wherein the degree of crystallization of the filaments / fibers is at least 80%. 8. Weefsel volgens conclusie 5, waarin de kristallisatiegraad van de filamenten/vezels ten minste 85% bedraagt.The fabric according to claim 5, wherein the degree of crystallization of the filaments / fibers is at least 85%. 9. Weefsel volgens conclusie 1, waarin ketting en inslag gelijk zijn.The fabric of claim 1, wherein warp and weft are equal. 10. Weefsel volgens conclusie 1, waarin het weefsel van het type met platte binding is.The fabric of claim 1, wherein the fabric is of the flat bond type. 11. Weefsel volgens conclusie 1, waarin de weefseldraden poriën bepalen met afmetingen van maximaal in de orde van 20 x 20 μηι.The fabric of claim 1, wherein the fabric threads define pores with dimensions of up to the order of 20 x 20 μηι. 12. Weefsel volgens conclusie 11, waarin de weefseldraden poriën bepalen met afmetingen van maximaal in de orde van 15 x 15 μπι.The fabric of claim 11, wherein the fabric threads define pores with dimensions of up to the order of 15 x 15 μπι. 13. Weefsel volgens conclusie 11, waarin de weefseldraden poriën bepalen met afmetingen van maximaal in de orde van 10 x 10 μιη.The fabric of claim 11, wherein the fabric threads define pores with dimensions of up to the order of 10 x 10 µm. 14. Weefsel volgens conclusie 11, waarin de weefseldraden poriën bepalen met afmetingen van maximaal in de orde van 5 x 5 Mm.The fabric of claim 11, wherein the fabric threads define pores with dimensions of up to the order of 5 x 5 mm. 15. Het gebruik van filamenten/vezels van het type pyneema (merk van de Nederlandse onderneming DSM) voor het weefsel volgens een der voorgaande conclusies.The use of pyneema (brand of the Dutch company DSM) filaments / fibers for the fabric according to any one of the preceding claims.
NL9400594A 1994-04-14 1994-04-14 Filter cloth fabric NL9400594A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL9400594A NL9400594A (en) 1994-04-14 1994-04-14 Filter cloth fabric
NL9401746A NL9401746A (en) 1994-04-14 1994-10-20 Filter cloth fabric.
AU21495/95A AU2149595A (en) 1994-04-14 1995-04-13 Filter cloth
EP95914577A EP0758262A1 (en) 1994-04-14 1995-04-13 Filter cloth
PCT/NL1995/000136 WO1995028216A1 (en) 1994-04-14 1995-04-13 Filter cloth

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9400594 1994-04-14
NL9400594A NL9400594A (en) 1994-04-14 1994-04-14 Filter cloth fabric

Publications (1)

Publication Number Publication Date
NL9400594A true NL9400594A (en) 1995-11-01

Family

ID=19864068

Family Applications (1)

Application Number Title Priority Date Filing Date
NL9400594A NL9400594A (en) 1994-04-14 1994-04-14 Filter cloth fabric

Country Status (1)

Country Link
NL (1) NL9400594A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0187974A2 (en) * 1985-01-11 1986-07-23 AlliedSignal Inc. Shaped polyethylene articles of intermediate molecular weight and high modulus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0187974A2 (en) * 1985-01-11 1986-07-23 AlliedSignal Inc. Shaped polyethylene articles of intermediate molecular weight and high modulus

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
E.H. VAN GORP & K.F. SCHOLLE: "HOCHLEISTUNGS-POLYETHYLENFASERN FÜR VERBUNDWERKSTOFFE MIT VERBESSERTER SCHLAGFESTIGKEIT", CHEMIEFASERN TEXTIL-INDUSTRIE, vol. 92, no. 40, March 1990 (1990-03-01), FRANKFURT AM MAIN DE, pages T12 - T16, XP000135292 *
R. KIRSCHBAUM ET AL.: "HOCHFESTE POLYETHYLEN-FASERN", CHEMIEFASERN TEXTIL-INDUSTRIE, vol. 88, no. 36, December 1986 (1986-12-01), FRANKFURT AM MAIN DE, pages T134 - T139 *

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