SE450777B - Press felt with seam - Google Patents

Press felt with seam

Info

Publication number
SE450777B
SE450777B SE8600811A SE8600811A SE450777B SE 450777 B SE450777 B SE 450777B SE 8600811 A SE8600811 A SE 8600811A SE 8600811 A SE8600811 A SE 8600811A SE 450777 B SE450777 B SE 450777B
Authority
SE
Sweden
Prior art keywords
seam
flap
wadding
base fabric
layer
Prior art date
Application number
SE8600811A
Other languages
Swedish (sv)
Other versions
SE8600811D0 (en
SE8600811L (en
Inventor
G Nohlgren
Original Assignee
Scandiafelt Ab
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
Publication of SE8600811L publication Critical patent/SE8600811L/xx
Application filed by Scandiafelt Ab filed Critical Scandiafelt Ab
Priority to SE8600811A priority Critical patent/SE450777B/en
Publication of SE8600811D0 publication Critical patent/SE8600811D0/en
Publication of SE450777B publication Critical patent/SE450777B/en

Links

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
    • D04H1/498—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 entanglement of layered webs
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/083—Multi-layer felts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Laminated Bodies (AREA)
  • Paper (AREA)

Abstract

It is standard to form an endless press felt with base weave 1, which has a splice in the form of seam 2, 3, which is covered with a wadding layer 4. In order to increase wear resistance and reduce marking, especially when under high pressure, the wadding layer 4 contains along the entire length of the cloth a stabilizing structure 5, weave, fibre cloth, or tricot held together with the wadding layer 4.<IMAGE>

Description

459 777 Vaddskiktet framställes vanligen av ett kardat fiberflor, som tvärlägges av en s.k. vaddläggare till en bredd, som överensstämmer med basväven. Vadden överföres till basväven och nâlas så att fibrerna i vaddskiktet dras ner mellan bas- vävens garner och fästes. 459 777 The batt layer is usually made of a carded fibrous web, which is crossed by a so-called waders to a width, which corresponds to the base fabric. The batt is transferred to the base fabric and needled so that the fibers in the batt layer are pulled down between the yarns of the base fabric and attached.

Genom nämnda sätt för att belägga basväven med vadd får fibrerna i vaddskiktet och i den av detta bildade vaddfli- ken över sömmen en orientering, som i huvudsak går tvärs filtarnas längsriktning eller körriktning. På grund härav och genom att fibrerna ej nâlas fast i basvägen utan enbart nålas, så att fibrerna slingras och knytes om varandra, blir styrkan i körriktningen mycket låg. Fibrer lossnar lätt genom påkänningarna i pappersmaskinen och vaddfliken kommer efter en viss tid ej att kunna fylla sin funktion som markeringsförhindrande täckning av skarven eller sömmen.By said method of coating the base fabric with wadding, the fibers in the wadding layer and in the wadding tab formed therefrom are given an orientation over the seam, which substantially runs transversely to the longitudinal direction or direction of travel of the blankets. Due to this and because the fibers are not pinned to the base road but only pinned, so that the fibers are wound and tied around each other, the strength in the direction of travel becomes very low. Fibers are easily loosened by the stresses in the paper machine and the wad flap will after a certain time not be able to fulfill its function as a marking preventing covering of the joint or seam.

Nedan redogöres för sambandet mellan vaddflikens egenskaper och banan samt vissa maskinelement i pappersmaskinen. En tunn och sliten vaddflik med dålig hållfasthet och dålig täckande förmåga kan ge upphov till; markering av banan, benbrott, störningar i pressen (skakningar och vibrationer), störningar i vakuumsystem samt genomgång av fibrer, dvs. transport av cellulosafibrer från banan i sömzonen till valsar och suglâdor. Maskinelement som sliter vaddfliken utgöres av suglådor, högtrycksspritsarfi press- och ledval- Sar- Tidigare har en metod utarbetats som ökar nötningsbeständig- heten hos själva vaddfliken ( svenska nntentet 447 140 )- Föreliggande uppfinning avser inte endast att öka slitstyr- kan hos vaddfliken. Den tar dessutom sikte på att minska den markering, som sömmen (även hos nya pressfiltar) orsakar vid höga presstryck.The connection between the properties of the wad flap and the web as well as certain machine elements in the paper machine is described below. A thin and worn wad flap with poor strength and poor covering ability can give rise to; marking of the web, bone fractures, disturbances in the press (shaking and vibrations), disturbances in the vacuum system and passage of fibers, ie. transport of cellulose fibers from the web in the seam zone to rollers and suction boxes. Machine elements that wear the batting flap consist of suction boxes, high-pressure sprinklers fi press and joint selection- Sar- Previously, a method has been developed which increases the abrasion resistance of the batting flap itself (Swedish nntentet 447 140). It also aims to reduce the marking that the seam (even with new press blankets) causes at high press pressures.

Markeringen från sömmen hos en ny filt beror dels på att ra- den av sömöglor har en annan struktur än basväven för övrigt, vilken kan ge ett avtryck i banan, dels beror den på att vaddfliken slites och blir tunnare, speciellt i den fria 7» I .y 450 777 kanten, så att den ej helt täcker sömmen.The marking from the seam of a new blanket is partly due to the fact that the row of seam loops has a different structure than the base fabric in general, which can give an impression in the web, and partly due to the fact that the wad flap wears and becomes thinner, especially in the free 7 » I .y 450 777 edge, so that it does not completely cover the seam.

Enligt den föreliggande uppfinningen innålas en förstärk- ningsduk, nedan benämnd skyddsbasväv, i vaddskiktet, vilken bildar en armering, som förutom att ge vaddfliken större slitstyrka ger denna större styvhet, vilket minskar den rent mekaniska markeringen av pappersbanan. Dessutom är det så förstärkta vaddskiktet likformigt runt hela filtomkretsen - även i sömfliken.According to the present invention, a reinforcing fabric, hereinafter referred to as protective base fabric, is sewn into the wadding layer, which forms a reinforcement which, in addition to giving the wadding flap greater durability, gives it greater rigidity, which reduces the purely mechanical marking of the paper web. In addition, the reinforced batt layer is so uniform around the entire felt circumference - even in the seam flap.

Skyddsbasvägen minskar slitaget dels genom att vaddflikens fibrer förutom att nålas om varandra även fästes vid skydds- basväven. Den styvhet vaddfliken härigenom erhåller hindrar den delvis från att sugas in i filtsuglådornas slitsar, vil- ket sker med stor kraft på en mjuk flik, med minskat slitage som följd.The protective base fabric reduces wear in part by attaching the fibers of the wad flap to the protective base fabric in addition to being pinned together. The rigidity the wadding flap thereby obtains partially prevents it from being sucked into the slits of the felt suction boxes, which is done with great force on a soft flap, with reduced wear as a result.

Fördelen med en skyddsbasväv, som sträcker sig över hela filtlängden, är att endast ett avbrott erhålles, där sömfli- ken skurits upp, och oj tre nvbrottsställen, vilket blir fal- let då enbart vaddfliken förstärkes.The advantage of a protective base fabric, which extends over the entire length of the felt, is that only one break is obtained, where the seam flap is cut open, and no three break points, which is the case when only the wad flap is reinforced.

Filten enligt figuren innefattar en basväv 1 som har en tvär- gående söm 2 bestående av låsöglor 2 och låstråd 3. Ovanpå basväven är fastnålad ett vaddskikt 4 som också innefattar skyddsbasvägen 5. ' Basväven 1 består av grövre, styvare trådar, s.k. monofila- ment, vanligen polyamid med diameter 0,3-0,6 mm. De längs- gående trådarna i denna basväv bildar sömmens låsöglor 2 som sammankopplas via låstråden 3, vanligen polyamidmonofilament 0,5-0,9 mm. Vaddfliken 4, vanligen polyamidfibervadd innehål- ler skyddsbasvägen 5, som kan ha olika utföringsformer bero- ende på den grad av markering, som kan tolereras. Vanligen består den av finare filament än basvävens. Skyddsbasväven behöver ej nödvändigtvis vara en vävd produkt utan kan även utgöras av en fiberduk, t.ex. spunbond eller en stickad pro- gdukt, t.ex. varptrikå.The blanket according to the figure comprises a base fabric 1 which has a transverse seam 2 consisting of locking loops 2 and locking thread 3. On top of the base fabric a batt layer 4 is also pinned which also comprises the protective base path 5. The base fabric 1 consists of coarser, stiffer threads, so-called monofilament, usually polyamide with a diameter of 0.3-0.6 mm. The longitudinal threads in this base fabric form the locking loops 2 of the seam which are connected via the locking thread 3, usually polyamide monofilament 0.5-0.9 mm. The wadding tab 4, usually polyamide fiber wadding, contains the protective base path 5, which may have different embodiments depending on the degree of marking that can be tolerated. It usually consists of finer filaments than the base fabric. The protective base fabric does not necessarily have to be a woven product but can also consist of a non-woven fabric, e.g. spunbond or a knitted product, e.g. warp knit.

Claims (1)

1. 450 777 PATENTKRAV Pressfilt med basväv (1) och nålat vaddskikt (4) samt ändlös genom en söm (2, 3) och som täckes av en vaddflik, k ä n n e t e c k n a d av att det nålade vaddskiktet (4) över hela filtlängden inklusive vaddfliken innehåller en med vaddskiktet hopnålad stabiliserande struktur (5), väv, fiber- duk eller trikåvara, som bidrar till att stabilisera vaddfli- ken och därmed minska markeringen från sömmen och slitaget på vaddfliken.450 777 PATENT REQUIREMENTS Press felt with base fabric (1) and needled wadding layer (4) and endless through a seam (2, 3) and which is covered by a wadding flap, characterized in that the needled wadding layer (4) over the entire felt length including the wadding flap contains a stabilizing structure (5) pinned together with the batting layer, fabric, non-woven fabric or knitted fabric, which helps to stabilize the batting flap and thereby reduce the marking from the seam and wear on the batting flap.
SE8600811A 1986-02-21 1986-02-21 Press felt with seam SE450777B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE8600811A SE450777B (en) 1986-02-21 1986-02-21 Press felt with seam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8600811A SE450777B (en) 1986-02-21 1986-02-21 Press felt with seam

Publications (3)

Publication Number Publication Date
SE8600811L SE8600811L (en)
SE8600811D0 SE8600811D0 (en) 1986-02-21
SE450777B true SE450777B (en) 1987-07-27

Family

ID=20363562

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8600811A SE450777B (en) 1986-02-21 1986-02-21 Press felt with seam

Country Status (1)

Country Link
SE (1) SE450777B (en)

Also Published As

Publication number Publication date
SE8600811D0 (en) 1986-02-21
SE8600811L (en)

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