EP0106775A1 - Verfahren zur Herstellung von Kunststoffgeweben, insbesondere für Papiermaschinen und nach dem Verfahren hergestelltes Kunststoffgewebe - Google Patents

Verfahren zur Herstellung von Kunststoffgeweben, insbesondere für Papiermaschinen und nach dem Verfahren hergestelltes Kunststoffgewebe Download PDF

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Publication number
EP0106775A1
EP0106775A1 EP19830440051 EP83440051A EP0106775A1 EP 0106775 A1 EP0106775 A1 EP 0106775A1 EP 19830440051 EP19830440051 EP 19830440051 EP 83440051 A EP83440051 A EP 83440051A EP 0106775 A1 EP0106775 A1 EP 0106775A1
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EP
European Patent Office
Prior art keywords
weft
threads
warp threads
warp
paper
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.)
Granted
Application number
EP19830440051
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English (en)
French (fr)
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EP0106775B1 (de
Inventor
André Pothier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toiles Franck Sa SA
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Toiles Franck Sa SA
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Filing date
Publication date
Application filed by Toiles Franck Sa SA filed Critical Toiles Franck Sa SA
Publication of EP0106775A1 publication Critical patent/EP0106775A1/de
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Publication of EP0106775B1 publication Critical patent/EP0106775B1/de
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths

Definitions

  • the present invention relates to the field of fabrics for forming the paper sheet of paper machines, and relates to a process for manufacturing plastic fabrics intended for this purpose.
  • the invention also relates to a plastic fabric obtained by applying this method.
  • the pulp which is a suspension in water of cellulose fibers and fillers at a concentration of about 1%, is poured over an endless sieve called canvas, through which it must drain quickly and regularly.
  • the fabrics used were metallic fabrics woven in twill weaves of 3, or knitting, these fabrics being rendered endless to the desired length by brazing or joining the canvas, and undergoing a treatment of finish before cutting to the desired width.
  • These fabrics are constituted by a number N of warp threads per cm called comb number, and by a number S of weft threads per cm called duitage, these numbers representing the texture are final after weaving.
  • the diameter of the weft threads is greater than the diameter of the warp threads by about 2/100 mm.
  • warp threads are strongly wavy, while the weft threads remain practically straight, so that the warp threads are prominent in relation to the weft threads.
  • a warp thread binds over a weft thread and passes under two weft threads, which corresponds to a float of the warp thread located on the face of the fabric in contact with the machine. , and the weft thread floats on the opposite side of the fabric, in contact with the paper.
  • the knitted wire fabrics present prominent chain floats towards the machine, resulting in premature wear of the warp threads causing deterioration of the fabrics as well as the work hardening of the threads subjected to alternating bending as well as corrosion phenomena.
  • the plastic threads used are either multifilament, that is to say constituted by twisted filaments, or monofilament, that is to say formed by a unitary horsehair of the desired diameter.
  • thermofixation is necessary for prevent excessive stretching of fabrics on paper machines.
  • This treatment also has the effect of making the longitudinal son less wavy, while the transverse son become significantly, so that they are prominent compared to the longitudinal son. This is one of the reasons which leads to using plastic fabrics with the weft effect on the machine side.
  • double-layer fabrics have been proposed in which the weft threads form a succession of pairs of wefts superimposed in the thickness of the fabric .
  • this type of fabric is difficult to manufacture and causes cleaning difficulties, in particular when the raw materials introduced into the paper pulp are recovered fibers.
  • the present invention aims to overcome these drawbacks.
  • the invention also relates to a plastic fabric obtained by application of this method, characterized in that it has a weave with any number of harnesses with at least two non-symmetrical alternate weft tying modes, the warp threads of which are strongly wavy in the horizontal and vertical planes.
  • the process for manufacturing fabrics Plastics in particular for paper machines, essentially consists in carrying out a weaving, on an existing machine, with any number of harnesses, for example five by alternating at least two non-symmetrical weft binding modes.
  • the weft threads 1 pass above two and below three warp threads 3, that is to say that they carry out a tying 2-3, while the weft threads 2 pass over one and below four warp threads by making a binding 1-4, the weft threads 1 and 2 being alternated and their binding being offset by a warp thread at each alternation.
  • FIG. 2 A weave thus formed is represented in FIG. 2 where the ties of the weft yarns 1 are shown diagrammatically by hatched squares l 'and those of the wires 2 by hatched squares 2', the arrows 1 "and 2" showing the renewal of the pattern. after a step of ten.
  • the bonding of the threads 1 causes the two warp threads 3 to join together, over which they pass, and this connection is kept as short as possible by the fact that the next double bonding point separated from the first by a weft thread 2, is offset by a warp thread 3 causing an oblique alignment called diagonal, so that a single warp thread from the first bond 2-3 belongs to the second bond 2-3.
  • FIG. 6 schematically represents another mode of armor with five harnesses with a pitch of twenty and alternating tying 2-3 and 1-4.
  • the simple tying points of the weft threads 2 give a float of the weft 2 below four warp threads 3 on the face of the fabric which will be in contact with the machine, this float supporting the abrasion during machine walking and allowing an extension of the service life of the fabric thus obtained due to the large volume to be abraded.
  • the double tying points of the weft threads 1 give, on the machine side, a float of the weft below only three warp threads 3, the tying above two warp threads 3 allowing to retain a greater number of paper fibers and thus improve retention.
  • the warp thread 3 passes, as shown in FIG. 3, over four weft threads, under a thread, over a thread, under a thread, then on two threads, and again under a thread at each step, i.e. a 4/1/1/1/2/1 tying, so that the greatest chain float is carried out above four weft threads preventing premature wear or risk of impact rupture against an element outside of the machine.
  • the warp thread 3 is thus protected, both on the machine side and on the paper side by the prominent weft threads, so that its diameter can be chosen to ensure only the essential mechanical resistance.
  • the weaving method according to the invention makes it possible to obtain meshes of variable length due to the undulation of the wefts 1 in the horizontal plane. This small desired displacement is beneficial, since the paper side of the fabric tends to form a pseudo-alignment of the binding points of the weft promoting the deposition of paper fibers and thereby improving retention.
  • the weaving mode in accordance with the invention makes it possible to obtain a slight difference in level between the consecutive weft threads.
  • the weft thread 2 is lifted by a single warp thread 3 and pulled down by four warp threads 3 so that on the paper side and on the machine side, it is slightly below the level.
  • the weft thread 1 is, on the other hand raised by two threads 3 and pulled down by only three warp threads 3, thus lying slightly above the average level, both on the paper side and on the machine side.
  • This embodiment combining a particular mode of tying of numerous weft threads and / or of large diameter, as well as a difference in level between wefts, therefore makes it possible to obtain a thicker fabric than that obtained with a conventional 5H weaving, and thus, greater dynamic drainage.
  • the insertion tension of the weft threads 1, 2 is adjusted differently depending on the mode of bonding (1-4 or 2-3 in the example described), or else, these wires 1-2 are of different natures, for example, some made of polyester, and others made of polyamide.
  • weft threads have a diameter very much greater than that of warp threads, so that their diameter ratio is at less equal to 1.7 while in existing paintings this ratio is always less than 1.6.
  • the amplitude a of the residual undulation of the warp threads after heat-fixing, between the crossing points of a warp thread C with two weft threads T consecutive is relatively small and is not significantly larger than the diameter of the warp threads, the excess beyond this diameter never exceeding 5/100 mm, so that all the warp threads remain substantially in one same longitudinal secant plane.
  • the amplitude a of the undulation between the crossing points of a warp thread C with two weft threads T is large and may exceed the value of 1.5 times the diameter of warp wire C, so that no secant longitudinal plane shows a continuous section.
  • the fabric obtained after stabilization heat treatment becomes practically non-deformable, having a low longitudinal elongation and negligible transverse shrinkage for service tensions which can reach 10 to 15 kg / cm in width.
  • the increase in transverse rigidity results in a significant improvement in the characteristics of the fabrics, which become comparable to those of double-layer fabrics and approach those of metallic fabrics.
  • the average elementary meshes obtained by applying the method according to the invention have an almost square shape, even rectangular, the longest side being oriented in the direction of the weft.
  • this process preserves a strong residual undulation of the warp threads, in particular at the level of the simple binding points, which notably improves the resistance of the spliced junctions.
  • the invention it is possible to produce fabrics for forming the sheet of paper, single layer, used in the manufacture of papers, wadding papers, or the like, as well as cardboard boxes based on old paper, and possibly neighboring products such as asbestos panels, chemical fiber panels, particle boards, etc., having qualities of transverse rigidity, thickness, and dynamic draining significantly better than those of the usual single layer fabrics and substantially comparable to those of a double layer canvas, while being less susceptible to fouling.

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  • Paper (AREA)
EP19830440051 1982-10-14 1983-10-13 Verfahren zur Herstellung von Kunststoffgeweben, insbesondere für Papiermaschinen und nach dem Verfahren hergestelltes Kunststoffgewebe Expired EP0106775B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8217340A FR2534601B1 (fr) 1982-10-14 1982-10-14 Procede de fabrication de toiles plastiques, en particulier pour machines a papier, et toile plastique ainsi obtenue
FR8217340 1982-10-14

Publications (2)

Publication Number Publication Date
EP0106775A1 true EP0106775A1 (de) 1984-04-25
EP0106775B1 EP0106775B1 (de) 1988-03-16

Family

ID=9278332

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830440051 Expired EP0106775B1 (de) 1982-10-14 1983-10-13 Verfahren zur Herstellung von Kunststoffgeweben, insbesondere für Papiermaschinen und nach dem Verfahren hergestelltes Kunststoffgewebe

Country Status (3)

Country Link
EP (1) EP0106775B1 (de)
DE (1) DE3376026D1 (de)
FR (1) FR2534601B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2601976A1 (fr) * 1986-07-24 1988-01-29 Perm I Tsellju Toile pour machine a papier.
US5228482A (en) * 1992-07-06 1993-07-20 Wangner Systems Corporation Papermaking fabric with diagonally arranged pockets
US5297590A (en) * 1992-07-06 1994-03-29 Wangner Systems Corporation Papermaking fabric of blended monofilaments
EP2004891A4 (de) * 2006-01-31 2012-07-25 Astenjohnson Inc Einschichtiges gewebe für papiermacher

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2596803A (en) * 1947-08-07 1952-05-13 Williamson Dickie Mfg Co Woven fabric
US3094149A (en) * 1960-11-14 1963-06-18 Orr Felt & Blanket Company Paper makers felt
FR1396549A (fr) * 1964-03-13 1965-04-23 Martel Catala & Cie Ets Perfectionnements apportés aux moyens pour l'élaboration de bandes sans fin tissées à fils plastiques et à fils métalliques, ainsi qu'aux bandes correspondantes
FR1548284A (de) * 1966-04-30 1968-12-06
FR2051011A5 (de) * 1969-06-10 1971-04-02 Huyck Corp
FR2411918A1 (fr) * 1977-12-15 1979-07-13 Siebtuchfabrik Ag Tamis pour machine a fabriquer le papier
US4231401A (en) * 1978-06-16 1980-11-04 Unaform, Inc. Fabric for papermaking machines
US4281688A (en) * 1979-05-01 1981-08-04 Scapa Dryers (Canada) Ltd. Reversible forming fabric having dominating floats on each face
GB2069017A (en) * 1980-02-11 1981-08-19 Huyck Corp Papermaking fabrics
EP0053317A1 (de) * 1980-11-27 1982-06-09 F. Oberdorfer GmbH & Co. KG Industriegewebe-Technik Papiermachergewebe

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2596803A (en) * 1947-08-07 1952-05-13 Williamson Dickie Mfg Co Woven fabric
US3094149A (en) * 1960-11-14 1963-06-18 Orr Felt & Blanket Company Paper makers felt
FR1396549A (fr) * 1964-03-13 1965-04-23 Martel Catala & Cie Ets Perfectionnements apportés aux moyens pour l'élaboration de bandes sans fin tissées à fils plastiques et à fils métalliques, ainsi qu'aux bandes correspondantes
FR1548284A (de) * 1966-04-30 1968-12-06
FR2051011A5 (de) * 1969-06-10 1971-04-02 Huyck Corp
FR2411918A1 (fr) * 1977-12-15 1979-07-13 Siebtuchfabrik Ag Tamis pour machine a fabriquer le papier
US4231401A (en) * 1978-06-16 1980-11-04 Unaform, Inc. Fabric for papermaking machines
US4281688A (en) * 1979-05-01 1981-08-04 Scapa Dryers (Canada) Ltd. Reversible forming fabric having dominating floats on each face
GB2069017A (en) * 1980-02-11 1981-08-19 Huyck Corp Papermaking fabrics
EP0053317A1 (de) * 1980-11-27 1982-06-09 F. Oberdorfer GmbH & Co. KG Industriegewebe-Technik Papiermachergewebe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2601976A1 (fr) * 1986-07-24 1988-01-29 Perm I Tsellju Toile pour machine a papier.
US5228482A (en) * 1992-07-06 1993-07-20 Wangner Systems Corporation Papermaking fabric with diagonally arranged pockets
US5297590A (en) * 1992-07-06 1994-03-29 Wangner Systems Corporation Papermaking fabric of blended monofilaments
EP2004891A4 (de) * 2006-01-31 2012-07-25 Astenjohnson Inc Einschichtiges gewebe für papiermacher

Also Published As

Publication number Publication date
FR2534601B1 (fr) 1986-08-22
DE3376026D1 (en) 1988-04-21
EP0106775B1 (de) 1988-03-16
FR2534601A1 (fr) 1984-04-20

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