SE442216B - PROCEDURE FOR PREPARING A DRAG PRESSED PIECE OF A FIBER FLOOR - Google Patents

PROCEDURE FOR PREPARING A DRAG PRESSED PIECE OF A FIBER FLOOR

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Publication number
SE442216B
SE442216B SE8006473A SE8006473A SE442216B SE 442216 B SE442216 B SE 442216B SE 8006473 A SE8006473 A SE 8006473A SE 8006473 A SE8006473 A SE 8006473A SE 442216 B SE442216 B SE 442216B
Authority
SE
Sweden
Prior art keywords
fibrous web
fibers
tensile
water
filter
Prior art date
Application number
SE8006473A
Other languages
Swedish (sv)
Other versions
SE8006473L (en
Inventor
Y Sumii
Y Matsumiya
Original Assignee
Freudenberg Carl Fa
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
Priority claimed from JP11982279A external-priority patent/JPS5643457A/en
Application filed by Freudenberg Carl Fa filed Critical Freudenberg Carl Fa
Publication of SE8006473L publication Critical patent/SE8006473L/en
Publication of SE442216B publication Critical patent/SE442216B/en

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0202—Separation of non-miscible liquids by ab- or adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/08—Thickening liquid suspensions by filtration
    • B01D17/10—Thickening liquid suspensions by filtration with stationary filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
    • B01D39/163—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin sintered or bonded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
    • D04H1/488—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation in combination with bonding agents
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • 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
    • B01D2239/1291—Other parameters

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Nonwoven Fabrics (AREA)
  • Filtering Materials (AREA)

Description

8006473-6 punkten, att fiberfloret förstärkes genom nålning med en in- stickstäthet av 10-300 instick/cm2 samt att fiberfloret uppvär- mes till en temperatur över 150°C under smält- eller sönderdel- ningspunkten för de sträckbara fibrerna och därefter dragpres- SaS . 8006473-6 point, that the fibrous web is reinforced by needling with an insertion density of 10-300 inserts / cm2 and that the fibrous web is heated to a temperature above 150 ° C below the melting or decomposition point of the extensible fibers and then tensile pressure. SaS.

Det är av väsentlig betydelse, att fiherfloret innehåller åtmins- tone 10 viktprocent, räknat på totalmängden fibrer, fibrer med en brottöjning på 100% eller mer, vid en temperatur som ligger 150°C under smältpunkten eller sönderdelningspunkten, och att fiberfloret nålas. Till de i handeln förekommande fibrerna med de erforderliga egenskaperna hör t.ex. Kanegafuchi Chemical In- dustry Co's "Kanakalon H.E.", som är en akrylnitril-polyvinyl- klorid-sampolymerfiber, Toray Industries, Inc's "Tetoron T-211", som är en osträckt polyesterfiber, du Pont's "Nylon", som är en 6.6-nylon, och "Wacker MP" från Wacker Chemie GmbH, som är en polyvinylklorid-polyvinylacetat-sampolymer.It is essential that the fibrous web contains at least 10% by weight, based on the total amount of fibers, fibers with an elongation at break of 100% or more, at a temperature below 150 ° C or the point of decomposition, and that the fibrous web is needled. The commercially available fibers with the required properties include e.g. Kanegafuchi Chemical Industry Co.'s "Kanakalon HE", which is an acrylonitrile-polyvinyl chloride copolymer fiber, Toray Industries, Inc.'s "Tetoron T-211", which is an unstretched polyester fiber, du Pont's "Nylon", which is a 6.6- nylon, and "Wacker MP" from Wacker Chemie GmbH, which is a polyvinyl chloride-polyvinyl acetate copolymer.

Valet av de övriga komponenterna i det formbara fiberfloret be- ror av slutprodukternas användning. Om slutprodukten t.ex. är- ett filter för en klimatanläggning, är det önskvärt att fiber- floret innehåller åtminstone 30% av en tändskyddande, termoplas- tisk fiber. Skall filterfloret användas för skiljande av olja och vatten bör fiberfloret innehålla åtminstone 20% av en termoplast- fiber med god oljebeständighet. Fiberfloret nålas därefter med en instickstäthet på 10-300 instick per cmz, varvid erhålles ett stabiliserat fiberflor, vars fibrer företrädesvis är anordnade Ii florets tjockleksriktning. Om en ännu högre formbeständighet eftersträvas, kan fiberfloret besprutas eller beläggas med en termoplastisk bindemedelsemulsion.The choice of the other components in the mouldable fibrous web depends on the use of the end products. If the end product e.g. is a filter for an air conditioning system, it is desirable that the fibrous web contains at least 30% of an ignition-protective, thermoplastic fiber. If the filter web is to be used for separating oil and water, the fiber web should contain at least 20% of a thermoplastic fiber with good oil resistance. The fibrous web is then needled with an insertion density of 10-300 inserts per cm 2, whereby a stabilized fibrous web is obtained, the fibers of which are preferably arranged in the thickness direction of the nonwoven. If an even higher dimensional stability is sought, the fibrous web can be sprayed or coated with a thermoplastic binder emulsion.

Ett filterflor för klimatanläggningar nålas företrädesvis med en instickstäthet på 10 - 100 instick per cmz. Vid filterflor för olja-vatten-avskiljning uppgår den optimala instickstäthe- ten till 15 - 300 instick per cmz. För sistnämnda användnings- område föredrages filterflor i burkform. Det är därvid fördelak- tigt att välja fiberflorets tjocklek mindre inuti än utanpå.A filter flora for air conditioning systems is preferably pinned with an insertion density of 10 - 100 inserts per cm 2. With filter webs for oil-water separation, the optimal insertion density is 15 - 300 inserts per cm 2. For the latter area of use, filter flor in canned form is preferred. It is then advantageous to choose the thickness of the fibrous web less inside than outside.

Därigenom förbättras filtreringsegenskaperna.This improves the filtration properties.

Fiberfloret kan dessutom stabiliseras medelst ett termoplastiskt 8006473-6 eller ett kemiskt förnätande bindemedel. Typen av använd binde- medelsemulsion, -dispersion eller -pulver beror av de krav som ställes på fiberfloret under dragpressningen respektive vid den slutgiltiga användningen.The fibrous web can also be stabilized by means of a thermoplastic 8006473-6 or a chemically crosslinking binder. The type of binder emulsion, dispersion or powder used depends on the requirements placed on the fibrous web during the tensile pressing and in the final use, respectively.

Om slutprodukten är t.ex. ett filter för klimatanläggningar,väl- jes antingen en termoplastisk emulsion, som har tändskyddande verkan eller ett bindemedelspulver med tillsats av en tändhämman- de plast. Skall det formbara materialet användas som filter för olja-vatten-avskiljning, väljes oljebeständiga harts såamxkloro- pren, akrylnitril, uretan eller akrylharts. Med tilltagande hård- het för bindemedlet erhålles en tilltagande formstabilitet för det dragpressade fiberfloret. Vid användning av ett bindemedel med elastiska egenskaper, som exempelvis vid uretaner lätt kan regleras, erhålles en mjuk inbindning av fibrerna i förenings- punkterna. Denna mjuka inbindning påverkar fiberflorets dragpress- ningsförmâga på ett gynnsamt sätt, så att inga skador uppträder.If the end product is e.g. a filter for air conditioning systems, either a thermoplastic emulsion is selected, which has an ignition-protective effect, or a binder powder with the addition of an anti-ignition plastic. If the mouldable material is to be used as a filter for oil-water separation, oil-resistant resins such as chloroprene, acrylonitrile, urethane or acrylic resin are selected. With increasing hardness of the binder, an increasing dimensional stability is obtained for the tensile fibrous web. When using a binder with elastic properties, which can be easily regulated in the case of urethanes, for example, a soft binding of the fibers in the connection points is obtained. This soft binding affects the tensile pressing ability of the fibrous web in a favorable way, so that no damage occurs.

Ett för olja-vatten-avskiljning avsett filterflor skall dessutom behandlas med ett vattenbortstörande medel med god oljebeständig- het. Härför lämpar sig vattenavstötande medel på fluor- eller ki- selbasis.An filter flor intended for oil-water separation must also be treated with a water-repellent agent with good oil resistance. Water-repellent agents based on fluorine or silicon are suitable for this.

Det på ovan beskrivet sätt erhållna fiberfloret förvärmes till en temperatur på O - 150oC under smältpunkten eller sönderdelnings- punkten för fibrerna, som har en brottöjning på 100% eller mer.The fibrous web obtained in the manner described above is preheated to a temperature of 0 DEG-150 DEG C. below the melting point or decomposition point of the fibers having an elongation at break of 100% or more.

I anslutning till denna förvärmning dragpressas fiberfloret un- der användning av vakuum- eller pressformningsförfarandet, var- vid i båda fallen användes formar med förutbestämd uppbyggnad.In connection with this preheating, the fibrous web is tensile pressed using the vacuum or press-forming process, in which case molds with a predetermined construction are used in both cases.

Efter avkylningen kan det användbara formstycket uttagas. Detta utmärkes, till följd av den minst 10-procentiga andelen höggra- digt sträckbara och därigenom gentemot rivning högresistenta fib- rer liksom förstärkningen genom en nålningsprocess, av en synner- ligen god likformighet och formstabilitet. Sträckningsförhållan- det per ytenhet kan vara större än 200%.After cooling, the useful molding can be removed. This is characterized, as a result of the at least 10% proportion of highly extensible and thereby highly resistant fibers against tearing, as well as the reinforcement by a needling process, by an extremely good uniformity and dimensional stability. The stretching ratio per unit area can be greater than 200%.

Föremâlet för föreliggande uppfinning beskrives närmare nedan i anslutning till bifogade ritning, på vilken fig. 1 visar ett av två skikt uppbyggt fiberflor före dragpressning, fig. 2 visar fi- POGR-'cvtf-:LITY 8006475-6 berfloret enligt fig. 1 i tvärsnitt i anslutning till dragpress- ningen, och fig. 3 visar fiberfloret enligt fig. 2 som en del av ett filter för en klimatanläggning i perspektivvy.The object of the present invention is described in more detail below in connection with the accompanying drawing, in which Fig. 1 shows a fibrous web built up of two layers before compression molding, Fig. 2 shows the fibrous web of Fig. 1 in cross-section in connection with the tensile pressing, and Fig. 3 shows the fibrous web according to Fig. 2 as part of a filter for a climate system in perspective view.

Fiberfloret enligt fig. 1 består av två med varandra förbundna skikt 1 och 2, som har väsentligen lika uppbyggnad, och som var- dera innehåller åtminstone 10%, räknat på fibervikten, sträck- bara fibrer med en brottöjning av åtminstone 100% vid en tempe- ratur av 150°C under smältpunkten eller sönderdelningspunkten.The fibrous web according to Fig. 1 consists of two interconnected layers 1 and 2, which have substantially the same structure, and which each contain at least 10%, calculated on the fiber weight, extensible fibers with an elongation at break of at least 100% at a temperature temperature of 150 ° C below the melting point or decomposition point.

Skiktet 2 är dessutom impregnerat med ett vattenavstötande me- del på fluorbasis. Vatten som träffar ovansidan avskiljes av skiktet 2, exempelvis ur en oljeström, och kvarhålles i skiktet 1, ur vilket det kan avlägsnas genom återspolning.Layer 2 is also impregnated with a water-repellent agent based on fluorine. Water hitting the top is separated by the layer 2, for example from an oil stream, and retained in the layer 1, from which it can be removed by rinsing.

Vid en formgivning motsvarande den som visats i fig. 2, vid vil- ken åtminstone en del av den aktiva filterytan 3 sträcker sig parallellt med strömningsriktningen för det medium som skall filt- reras, bildas därutöver i den undre delen eventuellt också en sump, i vilken större mängder av vattnet som skall avskiljas kan kvarhâllas. Funktionen motsvarar i övrigt den ovan beskrivna.In a design corresponding to that shown in Fig. 2, in which at least a part of the active filter surface 3 extends parallel to the flow direction of the medium to be filtered, a swamp may also be formed in the lower part, in which larger amounts of the water to be separated can be retained. The function otherwise corresponds to that described above.

Ställes ännu högre krav på avskiljningen,kan mellan det inre skik- tet 1 och det yttre skiktet 2 anordnas ytterligare ett skikt av ett vattenabsorberande material. En annan möjlighet är att be- handla skiktet 1 med ett vattenabsorberande medel.If even higher demands are placed on the separation, an additional layer of a water-absorbent material can be arranged between the inner layer 1 and the outer layer 2. Another possibility is to treat the layer 1 with a water-absorbing agent.

Fig, 3 visar ett filter för en klimatanläggning, som framställts med förfarandet enligt uppfinningen.Fiberfloret 4, som består av endast ett skikt, innehåller ett flertal fördjupningar 5, som framställts genom dragpressning. Fördjupningarna 5 är fyllda med fyllmaterial 6, exempelvis med ett material för absorbering av dåliga lukter. Man kan dessutom tillsätta baktericida material.Fig. 3 shows a filter for a climate system, which is produced by the method according to the invention. The fibrous web 4, which consists of only one layer, contains a plurality of depressions 5, which are produced by compression molding. The depressions 5 are filled with filling material 6, for example with a material for absorbing bad odors. Bactericidal materials can also be added.

Formstycket täckes på ovansidan av ett tunt, luftgenomsläppligt fiberflor 7, vilket i området för randzonerna är sammanlimmat med det dragpressade fiberfloret 4.The molding is covered on the upper side by a thin, air-permeable fibrous web 7, which in the area of the edge zones is glued together with the tensile fibrous web 4.

Exempel 1 Ett fiberflor, som innehåller 40 delar akrylnitril-polyvinyl- kloridsampolymer-fibrer 20 d/76 mm, 30 delar polyesterfiber 15 d/ 56 mm och 30 delar polyolefinpolyetylenfibrer 6 d/52 mm, nålades 8006473-6 med en nålanordning 15 x 18 x 32 x 31/2 RB. Nålinträngningsdju- pet var 10 mm och nåltätheten 30 instick per cm2. Det nålade floret impregueras medelst en rulle med polyvinylidenklorid- latex, så att ett fiberflor med en ytvikt på 100 g/m2 erhålles, och som uppvisar en tjocklek på 1,5 mm.Detta fiberflor upphettas under 1 minut till 13000 och underkastas sedan en dragpresspro- cess i en cirkelrund form. Formen innehåller fördjupningar res- pektiva upphöjningar till ett djup av 5 cm. Det erhållna form- stycket är tändskyddat, uppvisar hög formbeständighet och låg tryckkänslighet och har den för filtreringsändamål erforderliga höga luftgenomsläppligheten. Med en enkel ram anbragt på en fläkt erhålles ett väl utformat filter.Example 1 A fibrous web containing 40 parts of acrylonitrile-polyvinyl chloride copolymer fibers 20 d / 76 mm, 30 parts of polyester fiber 15 d / 56 mm and 30 parts of polyolefin polyethylene fibers 6 d / 52 mm was needled 8006473-6 with a 15 x 18 needle device. x 32 x 31/2 RB. The needle penetration depth was 10 mm and the needle density 30 inserts per cm2. The needled web is impregnated by means of a roll with polyvinylidene chloride latex, so that a fibrous web having a basis weight of 100 g / m 2 is obtained, which has a thickness of 1.5 mm. This fibrous web is heated for 1 minute to 13,000 and then subjected to a drawing press. cess in a circular shape. The shape contains depressions and respective elevations to a depth of 5 cm. The obtained molding is ignition-protected, exhibits high dimensional stability and low pressure sensitivity and has the high air permeability required for filtration purposes. With a simple frame mounted on a fan, a well-designed filter is obtained.

Exempel 2 Ett fiberflor bestående av 50 delar osträckta polyesterfibrer 1,5 d/51 mm, 20 delar polyakrylnitrilfibrer 4 d/51 mm och 30 de- lar polyamidfibrer 3 d/51 mm, nålades med en instickstäthet på 100 instick per cmz, så att nâlflor med en ytvikt på 500 g/cm2 erhölls. Nålfloret impregnerades med kloroprenlatex, så att för- hållandet fibrer till harts uppgick till 60:40. Floret behandla- des därpå med ett vattenavstötande medel på fluorbasis. Ytvikten ökades därigenom med ca 8 g/m2. Floret bringades därefter under 3 sekunder till 130OC och djuppressades därefter i en cylindrisk form med fördjupningar och upphöjningar till det önskade form- stycket. Det erhållna formstycket utnyttjades till filtrering av en olja-vattenblandning med en vattenandel på 10%. Filtratet innehöll därvidmycket litet vatten. Därav framgår, att filterma- terialets behandling med vattenavstötande medel är väsentlig för avskiljningseffektiviteten.Example 2 A fibrous web consisting of 50 parts of unstretched polyester fibers 1.5 d / 51 mm, 20 parts of polyacrylonitrile fibers 4 d / 51 mm and 30 parts of polyamide fibers 3 d / 51 mm, was needled at an insertion density of 100 inserts per cm 2, so that needles with a basis weight of 500 g / cm2 were obtained. The needle fleece was impregnated with chloroprene latex, so that the ratio of fibers to resin amounted to 60:40. The floret was then treated with a fluorine-based water repellent. The basis weight was thereby increased by about 8 g / m2. The fluorine was then brought to 130 DEG C. for 3 seconds and then deep-pressed into a cylindrical mold with depressions and elevations to the desired molding. The resulting molding was used to filter an oil-water mixture with a water content of 10%. The filtrate contained very little water. This shows that the treatment of the filter material with water-repellent agents is essential for the separation efficiency.

Claims (3)

8006473-6 Patentkrav8006473-6 Patent claims 1. l. Förfarande för framställning av ett dragpressat formstycke av ett fiberflor, k ä n n e t e c k n a t av att i fiber- floret inblandas åtminstone 10 t, räknat på fibervikten, strâckbara fibrer med en brottöjning av åtminstone 100 % vid en temperatur av l50°C under smält- eller sönderdelníngspunkt- en. att fiberfloret förstärkas genom nålning med en instícks- täthet av 10 - 300 ínstíck/cmz samt att fiberfloret uppvär- mes till en temperatur över 1S0°C under smält- eller sönder- delníngspunkten för de sträckbara fibrerna och därefter drag- pressas.1. A process for producing a tensile molding of a fibrous web, characterized in that at least 10 t, by weight of the fiber, are mixed into the fibrous web with extensible fibers having an elongation at break of at least 100% at a temperature of 150 ° C below melting or decomposition point. that the nonwoven is reinforced by needling with an insertion density of 10 - 300 inst / cmz and that the nonwoven is heated to a temperature above 1S0 ° C below the melting or decomposition point of the stretchable fibers and then tensile pressed. 2. Förfarande enligt kravet 1, k ä n n e t e c k n a t av att ett termoplastiskt bindemedel tillsättes till fíberfloret före draqpressníngen.2. A method according to claim 1, characterized in that a thermoplastic binder is added to the fibrous web before the drawing. 3. Förfarande enligt kravet 1. k ä n n e t e c k n a t av att ett förnätníngsbart bindemedel tillsättes till fiberfloret före dragpressningen.3. A method according to claim 1, characterized in that a crosslinkable binder is added to the fibrous web before the tensile pressing.
SE8006473A 1979-09-18 1980-09-16 PROCEDURE FOR PREPARING A DRAG PRESSED PIECE OF A FIBER FLOOR SE442216B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11982279A JPS5643457A (en) 1979-09-18 1979-09-18 Production of nonwoven fabric molded article
DE19803029752 DE3029752A1 (en) 1979-09-18 1980-08-06 METHOD FOR PRODUCING A DRAWN MOLDED PART FROM A FIBER FIBER

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SE8006473L SE8006473L (en) 1981-03-19
SE442216B true SE442216B (en) 1985-12-09

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FR (1) FR2465817A1 (en)
IT (1) IT1174306B (en)
SE (1) SE442216B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4418031A (en) * 1981-04-06 1983-11-29 Van Dresser Corporation Moldable fibrous mat and method of making the same
DE3151322C2 (en) * 1981-12-24 1983-11-10 Fa. Carl Freudenberg, 6940 Weinheim "Process for the production of spunbonded polypropylene nonwovens with a low coefficient of fall"
DE3151294C2 (en) * 1981-12-24 1986-01-23 Fa. Carl Freudenberg, 6940 Weinheim Spunbonded polypropylene fabric with a low coefficient of fall
FR2549418B1 (en) * 1983-07-22 1985-10-25 Peugeot Aciers Et Outillage SEMI-PRODUCT FOR THE MANUFACTURE OF THERMOPLASTIC MATERIALS AND METHOD OF MANUFACTURE
FR2561577B1 (en) * 1984-03-20 1986-09-12 Isoroy Sa MOLDABLE FIBROUS MATTRESS AND MANUFACTURING METHOD THEREOF
FR2584942B1 (en) * 1985-07-19 1989-12-01 Dollfus Noack Sa HIGH-TEMPERATURE CORROSIVE GAS FILTERING FELT
US4973382A (en) * 1988-07-26 1990-11-27 International Paper Company Filtration fabric produced by wet laid process
DE4024512A1 (en) * 1990-08-02 1992-02-06 Hoechst Ag DEEP-DRAWABLE TEXTILE MATERIAL AND MOLDED BODIES MADE THEREOF
DE4024510A1 (en) * 1990-08-02 1992-02-06 Hoechst Ag DEEP-DRAWABLE TEXTILE MATERIAL AND MOLDED BODIES MADE THEREOF

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1660717A1 (en) * 1951-01-28 1971-03-18 Bayer Ag Process for the production of dense, voluminous, thermally formed textile surfaces
FR1502654A (en) * 1966-05-04 1967-11-24 Rhodiaceta New stamped item and process for obtaining it
DE1580391A1 (en) * 1966-05-23 1970-10-15 Schaeffler Teppichboden Gmbh Lining parts for automobile bodies
GB1231263A (en) * 1968-05-08 1971-05-12
JPS4819913B1 (en) * 1969-06-17 1973-06-16

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FR2465817A1 (en) 1981-03-27
ES495140A0 (en) 1981-06-01
IT1174306B (en) 1987-07-01
SE8006473L (en) 1981-03-19
FR2465817B1 (en) 1984-06-01
IT8049687A0 (en) 1980-09-17
ES8105417A1 (en) 1981-06-01

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