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EP0027033A1 - Appareil et procédé pour la fabrication du papier - Google Patents

Appareil et procédé pour la fabrication du papier Download PDF

Info

Publication number
EP0027033A1
EP0027033A1 EP80303475A EP80303475A EP0027033A1 EP 0027033 A1 EP0027033 A1 EP 0027033A1 EP 80303475 A EP80303475 A EP 80303475A EP 80303475 A EP80303475 A EP 80303475A EP 0027033 A1 EP0027033 A1 EP 0027033A1
Authority
EP
European Patent Office
Prior art keywords
fabric
paper
yarns
dryer
weft yarns
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.)
Withdrawn
Application number
EP80303475A
Other languages
German (de)
English (en)
Inventor
Michael J. Josef
Eric R. Romanski
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.)
Albany International Corp
Original Assignee
Albany International Corp
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 Albany International Corp filed Critical Albany International Corp
Publication of EP0027033A1 publication Critical patent/EP0027033A1/fr
Withdrawn legal-status Critical Current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
    • D21F1/0036—Multi-layer screen-cloths

Definitions

  • the invention relates to paper machine clothing and more particularly relates to improved dryer felt components of paper machine apparatus.
  • Papermaking machines are well known in the art.
  • the modern papermaking machine is in essence a device for removing water from the paper furnish.
  • the water is removed sequentially in three stages or sections of the machine.
  • the furnish is deposited on a moving forming wire and water drained through the wire to leave a paper sheet of web having a solids content of circa 18 to 25 percent by weight.
  • the formed web is carried into a wet press felt section and passed through one or more nip presses on a moving press felt to remove sufficient water to form a sheet having a solids content of 36 to 44 percent by weight.
  • This sheet is transferred to the dryer section of the papermaking machine where dryer felts press the paper sheet to hot steam heated cylinders to obtain a 92 to 96 percent solids content.
  • the clothing employed on the paper making machine must perform a widely diverse range of functions, according to the position on the machine, i.e., forming, press or dryer section.
  • the clothing for use in each section of the machine must be manufactured to meet specific design requirements essential to the particular section.
  • the overall operation of the machine will be unsatisfactory. Optimum operating lives of the felts will not be achieved, product quality may be adversely affected, machine speeds may be lowered or drying efficiency may be impeded.
  • one or more dryer felts are employed as endless belts to support the paper sheet or web in its final drying.
  • the felt aids in drying, controls shrinkage of the web and prevents cockles.
  • the felt fabric must possess strength, dimensional stability, resistance to chemical and thermal degradation, resistance to abrasion and have a functional permeability.
  • all monofilament structured fabrics have been developed to meet the above-described needs of a dryer felt.
  • dryer felts fabricated from all monofilament fabrics have heretofore not been entirely satisfactory.
  • the previously used fabrics have relatively rough surfaces, which are broughtin contact with the paper sheet to be dried. This rough surface can mark the paper sheet. This of course may be highly undesirable, resulting in a high percentage of unsatisfactory paper product.
  • the dryer felt employed in the dryer section of a conventional paper making machine is fabricated from an all monofilament fabric of a particular weave which provides an exceptionally smooth surface to contact the paper sheet.
  • an all monofilament fabric of a particular weave which provides an exceptionally smooth surface to contact the paper sheet.
  • the invention comprises, in the dryer section of a paper making machine which includes an endless dryer felt, the improvement which comprises; a dryer felt fabricated from a woven fabric which comprises;
  • FIG. 1 is an enlarged, cross-sectional, side elevation of a portion of a fabric 10 embodying the invention.
  • the fabric 10 comprises a first sinuous layer 12 of monofilament weft yarns 14.
  • the layer 12 forms a periphery of fabric 10 which in side profile shows peaks 16 and valley floors 18. At least two peaks 16 in layer 12 are in a single plane and at least two of the valley floors 18 are in a separate, single plane inside of the plane formed by peaks 16.
  • a second sinuous layer 20 of monofilament weft yarns 14' forms another periphery of the fabric 10 which also appears, in side profile, as peaks 16' and valley floors 18'. At least two of the peaks 16' are in a single plane and at least 2 of the valley floors 18' are in a separate, single plane inside of the plane formed by peaks 16'.
  • a plurality of monofilament warp yarns 22 are positioned between the outside planes formed by the peaks 16 and the peaks 16' and interweave with the weft yarns 14, 14' at points between the respective planes of peaks 16, valley floors 18 and peaks 16', valley floors 18'.
  • the knuckles of load-bearing warp yarns 22 have peaks 23 which are in the same plane as the peaks 16 and 16'.
  • the peaks 16 and 23 are in a single plane which is the surface plane of fabric 10 which will support the paper sheet 24 when the fabric 10 is fashioned into a dryer felt and employed in accordance with the present invention.
  • the upper peripheral surface of the fabric 10 which supports paper 24 is tangent to the plane within which the peaks 16 of weft yarns 14 and the peaks 23 of warp yarns 22 lie as the paper 24 supporting elements.
  • the warp yarns 22 within layer 20 and the yarns within the pairs are offset from each other in regard to vertical alignment as they knuckle over the weft yarns 14, 14'.
  • One pair interweaves with every fourth of the weft yarns 14, 14' and the pattern repeats.
  • the monofilament yarns 14, 14' and 22 may be monofilaments of any synthetic polymeric resin.
  • Representative of such monofilaments are monofilaments of polyester, polyamide, polyolefin, polyaramid, polyimide and the like.
  • the fabrics embodying the invention are heat-set to stabilize the fabric and to set the yarns in their positions relative to each other. It will be appreciated by those skilled in the art that the degree of heat-setting required to obtain the desired structure will vary depending on the type of materials used in the yarns 14, 14' and 22. The optimum temperatures, times and tensions employed in heat-setting may be determined by trial and error techniques for each type of yarns employed in the fabrics embodying the invention. In general, heat-setting may be carried out at a temperature within the range of from about 150 o F to 375°F for from 15 to 60 minutes.
  • the fabrics embodying the invention may be woven endless or they may be woven flat and the ends joined by conventional seaming methods, known to those skilled in the art.
  • the endless belts so made are readily employed as dryer felts in the dryer section 30 of a paper making machine as shown in Figure 2. As shown in Figure 2, the paper sheet 24 is held against the steam cylinder 32 by the endless belt 34 of fabric 10 during passage of sheet 24 through dryer section 30.
  • a fabric embodying the invention was woven with machine direction yarns (warps) of 0.16" diameter polyester monofilaments in a density of 80 yarns to the inch and cross-machine direction yarns (weft) of the same monofilaments in a density of 48 yarns to the incho
  • the resulting fabric was heat-set until all yarns in the outer surface (warps and weft) had their outer peaks in a single plane, i.e., as shown by a fingerprint resembling that in Figure 3 of the accompanying drawings.
  • the fabric is made endless with a pin seam and installed as a dryer felt on a paper making machine. Any other conventional means of seaming the fabric may also be employed. Paper products are unmarked by the contact with the dryer felt.
  • Figure 3 is an "enlarged fingerprint", i.e.; a diagram of the paper sheet contacting surface of the fabric prepared in Example l o From the Figure 3, it will be seen that although the peaks 16 (knuckles of weft yarns 14) provide most of the surface area supporting the paper sheet 24, the peaks 23 (knuckles) of the warp yarns 22) also provide substantial support for the sheet 24 and the result is an extremely smooth, non-marking surface for the fabric and a dryer belt prepared therefrom.
  • the smooth surface has more sheet contact points per square inch for a more even pressure distribution to the paper sheet 24 as compared to conventional monofilament dryer felts. This enhances heat transfer to the paper sheet 24 from the hot dryer can in the dryer section of the paper making machine.
  • Example 1 Four endless dryer felts are made up from fabric prepared in accordance with the above Example 1.
  • the dryer felts are installed in both top and bottom positions of a two-dryer section papermaking machine, and two papermaking runs are made.
  • the ambient conditions under which the runs were made, paper sheet speed, steam pressures and average can and paper sheet temperatures are given in Table 2, below with measurements of the sheet moisture on entering and leaving the dryer sections.
  • the TAPPI drying rate is calculated and shown also.
  • Table 2 shows in comparison to runs with a dryer felt of similar construction but wherein only the warp yarns make substantial contact with the wet sheet, the following improvements: number of dryer cans in the section.
  • the layer 12 must have a smooth surface for contact with the paper sheet 24, the lower layer 20 need not have the same smooth outer surface.
  • the peaks 16' of yarns 14' need not be in a plane tangent to the peaks 23 of warp yarns 22 where they knuckle over the weft yarns 14'. Either of the peaks 23 or 16' can form the outer periphery of the lower layer 20.
  • This embodiment fabric is shown in Figure 4, where component yarns and layers are numbered to correspond to the same parts shown in Fig. 1 for the fabric 100 As also shown in Fig.
  • the number of interlacings of peaks 23 over weft 14' can be increased. This will prevent weft 14' from being as sinuously curved in plane 20 without altering the smooth surface of the face plane 120
  • the fabric of the invention may be woven to include various stuffer picks, to obtain fabrics of different permeabilities and any multilayer weaves known in the art may be used to weave the fabric used in the invention.

Landscapes

  • Paper (AREA)
  • Woven Fabrics (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
EP80303475A 1979-10-03 1980-10-02 Appareil et procédé pour la fabrication du papier Withdrawn EP0027033A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8161279A 1979-10-03 1979-10-03
US81612 1993-06-23

Publications (1)

Publication Number Publication Date
EP0027033A1 true EP0027033A1 (fr) 1981-04-15

Family

ID=22165247

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80303475A Withdrawn EP0027033A1 (fr) 1979-10-03 1980-10-02 Appareil et procédé pour la fabrication du papier

Country Status (12)

Country Link
EP (1) EP0027033A1 (fr)
JP (1) JPS5658090A (fr)
AR (1) AR226561A1 (fr)
AU (1) AU539520B2 (fr)
BR (1) BR8004760A (fr)
CA (1) CA1151925A (fr)
ES (1) ES8201247A1 (fr)
FI (1) FI803059A (fr)
MX (1) MX153332A (fr)
NO (1) NO802895L (fr)
SE (1) SE8006690L (fr)
ZA (1) ZA805079B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2486549A1 (fr) * 1980-07-10 1982-01-15 Albany Int Corp Tissu destine a etre utilise comme feutre de sechage pour machine a papier, et feutre de sechage constitue de ce tissu
FR2510632A1 (fr) * 1981-07-31 1983-02-04 Albany Int Corp Tissu pour feutre secheur de machine a papier et courroie secheuse utilisant un tel feutre
US4734239A (en) * 1983-04-02 1988-03-29 Akzo Nv Process for the production of water-insoluble fibers of cellulose monoesters of maleic acid, succinic acid and phthalic acid, having an extremely high absorbability for water and physiological liquids

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858623A (en) * 1969-06-10 1975-01-07 Huyck Corp Papermakers fabrics
US4041989A (en) * 1974-10-10 1977-08-16 Nordiska Maskinfilt Aktiebolaget Forming fabric and a method for its manufacture
US4071050A (en) * 1972-09-01 1978-01-31 Nordiska Maskinfilt Aktiebolaget Double-layer forming fabric
US4161195A (en) * 1978-02-16 1979-07-17 Albany International Corp. Non-twill paperforming fabric

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE366353B (fr) * 1972-09-01 1974-04-22 Nordiska Maskinfilt Ab
SE397371C (sv) * 1976-02-24 1980-08-18 Nordiska Maskinfilt Ab Formeringsvira for pappers-, cellulosa- eller liknande maskiner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858623A (en) * 1969-06-10 1975-01-07 Huyck Corp Papermakers fabrics
US4071050A (en) * 1972-09-01 1978-01-31 Nordiska Maskinfilt Aktiebolaget Double-layer forming fabric
US4041989A (en) * 1974-10-10 1977-08-16 Nordiska Maskinfilt Aktiebolaget Forming fabric and a method for its manufacture
US4161195A (en) * 1978-02-16 1979-07-17 Albany International Corp. Non-twill paperforming fabric

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2486549A1 (fr) * 1980-07-10 1982-01-15 Albany Int Corp Tissu destine a etre utilise comme feutre de sechage pour machine a papier, et feutre de sechage constitue de ce tissu
FR2510632A1 (fr) * 1981-07-31 1983-02-04 Albany Int Corp Tissu pour feutre secheur de machine a papier et courroie secheuse utilisant un tel feutre
US4734239A (en) * 1983-04-02 1988-03-29 Akzo Nv Process for the production of water-insoluble fibers of cellulose monoesters of maleic acid, succinic acid and phthalic acid, having an extremely high absorbability for water and physiological liquids

Also Published As

Publication number Publication date
ES495588A0 (es) 1981-12-01
ES8201247A1 (es) 1981-12-01
JPS5658090A (en) 1981-05-20
CA1151925A (fr) 1983-08-16
ZA805079B (en) 1981-09-30
AU6295780A (en) 1981-04-16
AU539520B2 (en) 1984-10-04
MX153332A (es) 1986-09-17
BR8004760A (pt) 1981-04-28
NO802895L (no) 1981-04-06
SE8006690L (sv) 1981-04-04
AR226561A1 (es) 1982-07-30
FI803059A (fi) 1981-04-04

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19811008

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ALBANY INTERNATIONAL CORP.

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19850330

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ROMANSKI, ERIC R.

Inventor name: JOSEF, MICHAEL J.