EP0183863B2 - Papier format pauvre en poussière, procédé pour sa fabrication et son emploi - Google Patents

Papier format pauvre en poussière, procédé pour sa fabrication et son emploi Download PDF

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Publication number
EP0183863B2
EP0183863B2 EP84114648A EP84114648A EP0183863B2 EP 0183863 B2 EP0183863 B2 EP 0183863B2 EP 84114648 A EP84114648 A EP 84114648A EP 84114648 A EP84114648 A EP 84114648A EP 0183863 B2 EP0183863 B2 EP 0183863B2
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EP
European Patent Office
Prior art keywords
dust
paper
low
range
longitudinal
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.)
Expired - Lifetime
Application number
EP84114648A
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German (de)
English (en)
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EP0183863B1 (fr
EP0183863A1 (fr
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STEINBEIS TEMMING PAPIER GmbH and CO
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Steinbeis Temming Papier & Co GmbH
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Application filed by Steinbeis Temming Papier & Co GmbH filed Critical Steinbeis Temming Papier & Co GmbH
Priority to AT84114648T priority Critical patent/ATE46378T1/de
Priority to DE8484114648T priority patent/DE3479749D1/de
Priority to EP84114648A priority patent/EP0183863B2/fr
Priority to JP60010700A priority patent/JPS61132700A/ja
Priority to DE19853517402 priority patent/DE3517402A1/de
Publication of EP0183863A1 publication Critical patent/EP0183863A1/fr
Publication of EP0183863B1 publication Critical patent/EP0183863B1/fr
Application granted granted Critical
Publication of EP0183863B2 publication Critical patent/EP0183863B2/fr
Priority to JP4327828A priority patent/JPH0693588A/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1845—Means for removing cut-out material or waste by non mechanical means
    • B26D7/1863—Means for removing cut-out material or waste by non mechanical means by suction
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/14—Secondary fibres

Definitions

  • the invention relates to format paper with 2 to 7% by weight of water, 10 to 20% by weight of ash and, as the remainder, paper fibers with a proportion of more than 10% by weight, based on the paper fibers, woody fibers, a brightness in the range from 65 to 91, and processes for its production and use.
  • Low-dust format papers are increasingly required. These are particularly important for use when copying.
  • the present invention has for its object to novel paper formats based on recycling, ie. H. at least partially starting from waste paper, which have particularly favorable properties with regard to their use for copying.
  • the papers should have a particularly low level of dust and burr-free cuts.
  • the invention is also directed to methods for producing such low-dust format papers and to their use as copy papers.
  • This task is accomplished by creating a format paper with 2 to 7% by weight of water, 12 to 20% by weight & ash and the remainder of paper pulps with a share of more than 10% by weight, based on the pulps, woody fibers and a brightness in the range from 65 to 91, which is characterized by dust adherence Mv on at least one longitudinal edge corresponding to a light reflectance value according to the adhesive tape method in the range from 2 to 6, and dust adherence on at least one transverse edge corresponding to a light reflectance value according to adhesive tape method below 1.5, measured in each case on the paper giant, and solved by methods for its production
  • longitudinal edge used in the context of the invention denotes the edge of the format paper which was cut with the longitudinal knife, while the term “transverse edge” stiffens the cut through the transverse knife.
  • the longer edge is the “longitudinal edge” (and the “transverse edge” is the shorter).
  • the "longitudinal edge” becomes the shorter edge (and the “Querilcante” the longer edge) for the formats A4 and A3.
  • woody fibers are understood to mean either wood sanding itself, or refiner sanding or TMP (thermo-mechanical pulp) or TCMP etc. fibers or mixtures thereof.
  • the woody fibers are represented with 58 to 82% by weight of the (paper) fiber fraction, and particularly preferably with 65 to 80% by weight of the fiber fraction, the remaining fiber fraction being formed by cellulose fiber.
  • the paper according to the invention is particularly controlled with regard to its ash content, which is preferably between 14 and 17% by weight, based on the paper.
  • the water content or the moisture of the paper according to the invention is also controlled within narrow limits and is particularly preferably between 4 and 5.5% by weight, based on the total paper.
  • the low-dust paper according to the invention has (4 to 5.5) ⁇ 0.5% by weight of water, 14 to 17% by weight of ash and the remainder paper pulp, with respect to the pulp , the proportion of woody fibers makes up 65 to 80% by weight. It is also preferred that the paper according to the invention has a brightness in the range between 73 to 80.
  • the paper according to the invention is characterized in particular by a very low level of dust, the dust adhesion on at least one longitudinal edge being in the range from 2.5 to 6 and preferably 2.5 to 5.5.
  • High-quality papers which are particularly suitable for copying purposes have a medium one Dust adhesion in the range from 2.5 to 5 min at least one longitudinal edge.
  • those specifications are preferred which have the specified values for dust adhesion on at least one longitudinal edge, but particularly advantageously on both longitudinal edges present.
  • the papers according to the invention can have a bulk density in the range of 0.65-0.90 gsm 3 (according to DIN 53105), the range of 0.7-0.8 being particularly advantageous.
  • the format paper according to the invention also has a small proportion of cross-edge dust, which is generally less than 1.5 and preferably in the range from 0.5 to 1 for at least one cross-edge, but advantageously both cross-edges.
  • the surface dust of the format papers according to the invention is also low, with a dust number of less than 3 for one, but preferably both, paper surfaces (i.e. both the top and the bottom of the paper).
  • the values for the dust number relate to the determination by means of a Lorentzen & Wettres dust tester of the code no. 56 of the Swedish manufacturer mentioned, the methodology being explained in more detail below.
  • the paper according to the invention is produced from at least partially waste paper. It is preferred that the paper is obtained from at least 60% pulp, preferably 70 to 100% and particularly preferably completely from pulp that was produced from waste paper. If only partial use of pulp from waste paper is used, a corresponding share of native materials used for paper production is added.
  • the papers according to the invention can be produced by methods such as are the subject of German patent applications P 3 148 749 and 3 148 750 (applicant Steinbeis Textil GmbH, Gemmrigheim), although additional, complex measures are provided to achieve a low dust level of the papers according to the invention .
  • the invention is particularly advantageously directed to low-dust form paper, which is preferably in A4 and A3 format, with 4 to 5% by weight of water, 14 to 17% by weight of ash, and the remainder paper pulp with a proportion of 65 to 80% by weight, based on the fiber materials, woody fibers, a brightness in the range from 73 to 80, with dust adherence on at least one longitudinal edge corresponding to a light reflectance value according to the adhesive tape method in the range from 2 to 5.5, and dust adherence according to adhesive tape methodology on at least one transverse edge corresponding to a light reflectance value below 1.1, measured in each case on the paper giant, producible using possibly sorted, processed waste paper using a dissolving, deinking, sorting and optionally dispersing and bleaching stage ( n), as well as paper production from 60 to 100% of the pulp obtained in this way on the paper machine, the optionally using crushing bars with Integrated dust extraction at a speed of 100 to 400 m / min.
  • the process according to the invention for producing format papers with a proportion of woody fibers of more than 10% by weight sees the use of optionally pre-sorted, processed waste paper using dissolving, deinking, sorting and optionally dispersing and Bleaching stage (s), which is then followed by paper production on the paper machine, dust being drawn off during the cutting process, both during longitudinal cutting and during transport for cross cutting as well as during cross cutting of the paper produced.
  • a dust extraction is also provided after the cross cutting during transport and sorting.
  • composition of the sizing can also influence the low dust level, which is why it is preferred not only to add resin glue but also cationic starch in addition to the usual auxiliaries.
  • air is blown into the cut edge of the paper web, which is optionally guided over break bars with integrated dust extraction, and the resulting dust is suctioned off, after which the longitudinally cut one
  • the paper web is guided over a suction table having elongated holes in such a way that the longitudinal edges of the paper web lie exactly above the elongated holes from which dust is again drawn off and then dust is blown off or drawn off again at the transverse knives.
  • the counter-rotating upper and lower knives of the slitter or cross cutter preferably have a hard metal or WIDIAO alloy coating on at least one knife. It can also be preferred within the scope of the method according to the invention to arrange the upper and lower knives without angles to one another in order to achieve an optimal cutting-time behavior.
  • the paper web is guided, as mentioned above, over a suction table having elongated holes, dust being drawn off from the region of the longitudinal edges by a vacuum.
  • the elongated holes are preferably arched transversely to the direction of transport of the paper webs, so that the giant R conveyed thereon "blows up and also releases the dust from the inner regions of the paper webs.
  • the dust can also be extracted through the elongated holes acting brushes can be improved, for example they can be designed as rotary brushes which are arranged directly above the elongated holes.
  • dust can additionally be suctioned off in the area of the lower knives of the longitudinal knife section, and, as mentioned above, air blowing from below can also be present in the area of the upper knives for extracting dust.
  • the vacuum in the dust extraction in the area of the lower knives of the longitudinal knife and / or cross knife section and / or the suction table can be at cutting speeds between 100 to 400 mlmin. advantageously be kept in the range of about 250 to 40 mbar. The best results are achieved in this area, although it is also possible to set the vacuum values specified above the limit values.
  • R adhesive tape method for determining the cut edge dust is now described below: It is based on the principle that a clear or transparent adhesive tape is applied to the edge to be measured on a clamped paper giant and then removed again.
  • the clear adhesive tape the adhering dust is applied to a black adhesive tape and the brightness of the black adhesive tape stuck with the clear adhesive tape is measured, the standard value being the black adhesive tape with the applied clear adhesive tape which was not applied to a paper giant, the deviation of the brightness from the initial value represents represents a measured value that allows conclusions to be drawn about the amount of dust used.
  • the measurement method according to the invention on which the above-mentioned values of the edge dust are based, is used:
  • Tesa®-Film clear, No. 4206 (Beiersdorf, Hamburg) was used as a representative of such a clear adhesive tape.
  • a 30 mm wide specification is suitable as black adhesive tape.
  • "Tesa® film” No. 104 black manufactured with advantage.
  • carton 250 glm 2 a tensioning device for the ream, a suitable design being shown in FIG. 1.
  • a load roller for the adhesive tape with a weight of the roller of approx. 6 kg, the roller being held in such a way that the axis remains freely movable and no additional force is exerted on the press gap during the loading process.
  • the roll is covered with a rubber layer with a hardness of 40 ° Shore A.
  • a so-called Hunterlab device is used (D 25 D 2MIL color and color difference measuring device from Hunter Associates Laboratory, Inc., 9529 Lee Highway, Fairfax, Virg. 22030, USA). The measuring opening is reduced to a value of 15 x 49 mm (according to FIG. 3).
  • the individual procedure is as follows: The cardboard is cut to approx. 35 - 50 cm and glued parallel to the long edge at a distance of approx. 2 cm with black adhesive tape (Tesa film No. 104)
  • a ream is pushed open to the side and clamped with the pushed edge down into the tensioning device (according to FIG. 1).
  • the pressure on the pressure gauge is adjusted so that a weight of 1 kg / cm 2 is exerted on the ream according to the area in the piston becomes.
  • the rip cut there is cut approx. 10 mm below the longitudinal edge with a carpet knife. This prevents any cutting dust from getting through the cut of the wrapping paper on the surface to be tested.
  • the clear adhesive tape (Tesa® film No. 4206) is now applied to the cut edge over the entire length and pressed five times with the load roller.
  • the feed speed for the roll is selected so that a loading process for the longitudinal edge takes approx. 1 second for A4 format and proportionally shorter for the transverse edge.
  • the roll is also guided in such a way that only its own weight is loaded.
  • the clear adhesive tape is peeled off in approx. 2 seconds (with A4 format) with a force between 0.75 and 1.25 N, preferably approx. 1 N, and onto the black adhesive tape ( Tesa®-Film No. 104) applied over the entire length in the middle in such a way that the adhering dust is enclosed between the two adhesive tapes.
  • the tape is then pressed on evenly without bubbles using a cloth
  • Brightness measurements are then carried out on the Hunterlab device with the reduced measuring aperture (FIG. 3). B. three measurements per edge are sufficient.
  • the brightness of the black adhesive tape (Tesa® film No. 4206) stuck with the dust-free clear adhesive tape (Tesa® film No. 4206) is entered as a starting value in the Hunterlab device.
  • the deviation from the initial value is then used as the measured value for the dust intensity.
  • the measured value M found is converted to a unit bulk density of 1 g / cm 3 , ie multiplied by the ratio of the bulk density.
  • the surface dust values were determined using a code 56 dust tester from AB Lorentzen & Wettre, Sweden. The determination of the dusting number is based on the fact that a number of sheets of paper are brought into contact with water via rollers, and the dust picked up here is retained on black filter paper and compared visually. In particular, a type according to drawing A 3178-4375 of the manufacturer's announcement dated January 21, 1983 and the measurement method described herein are used as the dust tester of code 56.
  • the tensioning device shown in FIG. 1 for determining the amount of edge dust on a paper giant according to the adhesive tape method comprises a base plate 10, on which a hydraulic pump unit 12 is attached in the right half in FIG. 1.
  • This pump unit is actuated by an electrical switching device 14, on the top of which switching buttons 16 are arranged.
  • the space on the right above the base plate 10 with the pump assembly 12 and the switching device 14 is delimited by a separating plate 18 welded on at right angles above the base plate 10.
  • the hydraulic drive 20 On the side facing away from the separating plate 18, the hydraulic drive 20 is connected to a movable clamping plate 26.
  • this movable clamping plate 26 At a distance from this movable clamping plate 26 there is a fixed clamping plate 28 on the side facing away from the separating plate 18, which is welded onto the base plate 10 in parallel relationship to the movable clamping plate 26.
  • the paper to be examined is inserted between the clamping plates before the examination, after which the movable clamping plate 26 is moved by means of the hydraulic drive 20 onto the fixed clamping plate 28 until the desired pressure is displayed on the manometer 24, which corresponds to the defined pressure with which the paper giant is to be pressed together by the clamping plates.
  • the support roller shown in FIG. 2 for pressing the adhesive tape onto the edge surface of the ream to be examined with regard to the dust accumulation consists of a steel core 32, on the circumference of which a rubber jacket 34 is applied. Since this support roller should only exert a defined pressure on the adhesive tape, which corresponds to the weight of the roller, a special connection between the roller and the handle 36 is provided. This connection is designed such that pins 38 are arranged on the axial end faces of the steel core 32, each of which engages in a guided but movable manner in an elongated hole 40 of a holding bracket 42, which holding bracket 42 is provided with a push rod 44 and a handle 46 attached to it. in the illustrated embodiment, the push rod 44 is welded at right angles to the center of the bracket 42.
  • This constructive structure of the support roller prevents the drive force applied when moving the roller from having a component in the direction of the support surface of the support roller, so that a defined pressure always acts on the adhesive tape when the roller is moved.
  • FIG. 3 of the drawings shows a section according to FIG. 3a and a plan view according to FIG. 3b for dust measurement by means of the so-called “Hunterlab” device.
  • this diaphragm consists of a solid ring 46 with a height H.
  • the ring is conically tapered on the inner circumference and on the outer circumference in the same sense, so that a large upper ring opening 48 and a lower, smaller ring opening 50 are provided in the interior of the ring 46 is.
  • This lower, smaller ring opening 50 has a rectangular shape with a width b and a length I, which is greater than the diameter D of the upper ring opening 48.
  • the actual diaphragm opening is thus formed by the lower ring opening 50
  • FIG. 4a and 4b each show a diagram.
  • the difference in brightness is plotted on the ordinate of the diagrams.
  • the abscissa indicates whether it is the paper according to the invention or a commercial type I, II or 111 paper.
  • the boxes indicated in the diagrams indicate the brightness difference ranges for the respective paper quality, the reference size being the black one Is the surface of the reference surface, which practically results in a reflection of 0, i. H. a minimal remission sanctity If the dust removed from the edge of the paper giant is on the black reference surface due to the adhesive tape, the reflectance brightness varies depending on the amount of dust, i. H. bigger the more dust there is.
  • the diagrams clearly show that the brightness difference values for the paper according to the invention are substantially lower than for the known paper types specified, i.e. H. the paper according to the invention has in the region of the edges or edges a significantly lower accumulation of dust which has arisen from the cutting action on the paper.
  • Fig. 5 shows schematically a part of a system which shows, in succession, processing stations in which the paper web is acted on in different ways. In particular, various dedusting measures are taken.
  • FIG. 5 shows, from left to right, a station A in which the paper web is guided past a break bar. This is followed by a station B, in which, if desired, the paper web is perforated through a rotary hole. This is followed by the longitudinal process in a station C. cutting the paper web. The paper web is cross-cut in a subsequent station D, which is followed by a sorting switch E and a collecting station F, where the cut paper sheets are sorted or stacked. In the last station G, the stacked sheets of paper are transversely transported.
  • FIG. 6 shows the crushing bar 52 located in station A with integrated dust extraction.
  • the paper web P runs from a roller 54 to the break bar 52, where the paper web is guided with a deflection (a) around an edge 56 of the break bar 52
  • the crushing bar consists of a hollow box 58, in which a suction nozzle 60 is fastened on the side facing away from the breaking edge 56, to which suction nozzle 60 a hose 62 is fastened
  • the breaking edge 56 is located on a block 64 which is fastened on the side of the hollow box 58 facing away from the suction nozzle 60.
  • a suction channel 66 in block 64 which is aligned with a suction opening 68 in hollow box 58.
  • Two suction channels 66, 67 are provided in a symmetrical arrangement, so that block 64 The position can be changed such that after the breaking edge 56 has worn, the breaking edge 57 arranged symmetrically thereto can be used.
  • the entire crushing bar 52 can be pivoted back and forth about the central axis M of the roller 54 to a specific deflection angle (a).
  • FIG. 7 shows station C in more detail.
  • An upper knife 72 and a lower knife 74 are rotatably mounted in a frame 70 of this station, these knives being designed as circular knives which are arranged parallel to one another in the direction of their axis of rotation, one in each case circular cutting edge 75 of the lower knife 74 and an annular cutting edge 73 of the upper knife 72 cooperate and overlap one another in a longitudinal cutting area a.
  • the axes of the circular knives 72, 74 are aligned parallel and one above the other perpendicular to the direction of movement of the paper web.
  • the paper web runs continuously over the guide plate 76 and the suction table 78, with the aforementioned knife cutting the paper web lengthways. With this slitting, paper dust develops, which should be removed as completely as possible. In the large area of longitudinal cutting, this is done in three ways, namely by means of a first suction device 80 located directly below the lower knife 74, a second suction device 82 adjoining it, located above the suction table 78 and behind the upper knife 72, and one below the suction table 78 in the direction of movement third suction device 84 located on the paper web behind the second suction device 82.
  • first suction device 80 there are a row of suction openings 88 in an L-shaped lower knife bar 86 directly below the lower knife 74, below which a suction box 9 is connected to the lower knife bar 86 and is connected to a hose 94 via a connecting piece 92.
  • the above-mentioned guide plate 76 is fastened to the vertical leg of the lower knife bar 86 above a bar 96.
  • a cladding plate 98 is fastened in the inner angular region of the lower knife bar 86 in order to prevent dust nests from forming there.
  • an end plate 100 is attached, which extends to the lower cutter 74 and thus forms a suction space 102 in the lower region of the lower cutter together with the lower cutter 74, the strip 96, the guide plate 76 and the suction table 78.
  • the second suction device 82 has a blow pipe 104, which is located below the suction table 78. In the radiation area of this blow pipe 104 there are slots 77 in the suction table 78, through which the interfaces of the paper web extend after the longitudinal cutting, so that dust still at the interfaces is blown off and directed into the mouth opening 106 of an upper suction pipe 108.
  • the third suction device 84 is located behind the second suction device 82 with respect to the direction of movement of the paper web and essentially consists of a suction box 110 located below the suction table 78, to which a hose 112 is fastened.
  • the suction box 110 is provided with elongated holes 114 in the suction table 78 Connection over which the previously mentioned interfaces of the paper web run after the longitudinal cutting.
  • this third suction device 84 there is a further guide plate 116, to which a pair of pulling rollers 118 is connected.
  • FIG. 8b shows a section through an elongated hole 114 along the line b - b in FIG. 8a.
  • the upper knife 72 and the lower knife 74 can be seen schematically on the left in FIG. H. in the running direction of the paper web adjoining suction table 78 with the suction box 110 underneath.
  • On the right side of the suction table is the already mentioned pair of pull rollers 118, which are pull rollers with which the paper web is pulled over the suction table.
  • the edges 79 of the longitudinal slots 114 which extend transversely to the longitudinal direction of the longitudinal slots 114, are arched downward.
  • the radius of this arching is about 3 mm when new and changes with increasing wear.
  • the width of the longitudinal slots depends on the paper quality and is selected in exact coordination with the length of the longitudinal slots, whereby the opening cross-section of the longitudinal slots depends on the suction power and the available space in the machine.
  • the slots are located directly behind the longitudinal cutter, but must be more uniform in the area Tension must be arranged in front of the cross knife.
  • a single, inherently rigid suction box or suction table does not necessarily have to be used.
  • the slits can be changed in the width direction in order to adapt them to the respective sheet form.
  • the convex edges 79 serve to fan out the interface of one or more superimposed paper webs when the paper web with the interface is continuously moved over the longitudinal slot 114 and air is sucked through the longitudinal slots into the suction box, which air is not only a deforming action on the paper sheets in the longitudinal section area, but also has an effect in that residual dust still present, favored by the fanning out, is drawn off into the suction box.
  • FIG. 9 A corresponding suction device results from FIG. 9, where two identical knife drums 122 lying one above the other are rotatably mounted in a frame 120 in such a way that the knives 124 located therein come into contact with one another at a very specific point, so that at this point a cross cutting of the Paper web takes place
  • a U-shaped bar 125 which surrounds at least the lower half of the lower knife drum 122 and thus forms a suction space 126.
  • suction openings 128 are formed, to which a suction device, not shown, is connected.
  • a guide plate 130 for the paper web In the direction of movement of the paper web from left to right in front of the two knife drums 122 there is also a guide plate 130 for the paper web, which in the rest enlarges the suction space 126 up to the top of the lower knife drum.
  • the running into the area of the cross cutters is stabilized by guiding the paper web over the suction table 78 already mentioned and described, so that a perfect cross cutting can take place.
  • FIG. 10 The relevant suction device is shown in FIG. 10.
  • a cross conveyor belt 132 is shown, on which the paper giant R rests.
  • the paper giant R is laterally delimited by support belts 134 deflected about vertical axes, with a small space remaining between the paper giant and the support belts.
  • Below the conveyor belt 132 there is a suction box 136 with a suction nozzle 138 and a hose 140 adjoining it. Laterally, the suction box 136 there are suction openings 142, which are in communication with the gap between paper rolls R and the support belts 134.
  • the rejects obtained were re-sorted using a slotted basket.
  • the acceptor of the sorter was first thickened to a solids content of 14% by means of disk filtration, then diluted to a solids content of 3.5% and then brought to a solids content of 28%. After-treatment was carried out in the disperser at temperatures up to 95 ° C, if necessary using peroxide or bleach Sodium dithionite (at approx. 6% and 50 to 60 ° C).
  • the pulp obtained was placed on a conventional paper machine. The papers produced for this were then cut as follows or subjected to the following conditions:
  • the paper war yellow colored and had a brightness value of 80%.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Details Of Cutting Devices (AREA)
  • Duplication Or Marking (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)

Claims (27)

1. Papier au format ayant de 2 à 7 % en poids d'eau, 10 à 20 % en poids de cendre, le reste étant constitué de matière fibreuses de papier contenant plus de 10 % en poids, par rapport aux matières fibreuses du papier, de fibres lignifiées, et avec une clarté de 65 à 91, caractérisé par un coefficient d'adhérence des peluches Mv, sur au moins un bord longitudinal, correspondant à un facteur de luminance compris entre 2 et 6 quand il est déterminé par la méthode de la bande adhésive, et par un coefficient d'adhérence des peluches, sur au moins un bord transversal, correspondant à un facteur de luminance inférieur à 1,5, mesuré chaque fois sur une rame de papier par la méthode de la bande adhésive.
2. Papier peu pelucheux selon la revendication 1, caractérisé en ce que les fibres lignifiées comptent pour 50 à 82 % en poids des fibres.
3. Papier peu pelucheux selon la revendication 1, caractérisé en ce que les fibres lignifiées comptent pour 65 à 80 % en poids des fibres.
4. Papier peu pelucheux selon la revendication 1, caractérisé en ce que les fibres restantes sont des fibres de pâte.
5. Papier peu pelucheux selon la revendication 1, caractérisé en ce que la teneur en cendres est de 14 à 17% en poids.
6. Papier peu pelucheux selon la revendication 1, caractérisé en ce que la teneur en eau est de 4 à 5,5 % en poids.
7. Papier peu pelucheux selon la revendication 1, avec (4 à 4,5) ± 0,5 % en poids d'eau, 14 à 17 % en poids de cendres, le reste étant constitué de matières fibreuses de papier, la part des fibres lignifiées y comptant pour 65 à 80 %.
8. Papier peu pelucheux selon l'une ou plusieurs des revendication précédentes, mais en particulier selon la revendication 7, caractérisé en ce que la clarté est comprise entre 70 et 80.
9. Papier peu pelucheux selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que le coefficient d'adhérence des peluches sur au moins un bord longitudinal est compris entre 2,5 et 6.
10. Papier peu pelucheux selon la revendication 1 ou 9, caractérisé en ce que le coefficient moyen d'adhérence des peluches sur au moins un bord longitudinal est compris entre 2,5 et 5,5.
11. Papier peu pelucheux selon la revendication 1 ou 10, caractérisé en ce que le coefficient moyen d'adhérence des peluches sur au moins un bord longitudinal est compris entre 2,5 et 4,5.
12. Papier peu pelucheux selon la revendication 1, caractérisé en ce que le coefficient d'adhérence des peluches sur au moins un bord transversal est compris entre 0,5 et 1.
13. Papier peu pelucheux selon la revendication 1, caractérisé en ce que les peluches superficielles, sur au moins une face, correspondent à un indice de peluchage, mesuré par la méthode de filtration (appareil selon le code 56 de AB Lorentzen & Wettre, Suède), inférieur à 3.
14. Papier peu pelucheux selon la revendication 13, caractérisé en ce que les peluches superficielles correspondent à un indice de peluchage compris entre 1,5 et 2,6.
15. Papier peu pelucheux selon l'une ou plusieurs des revendications précédentes, caractérisé en ce qu'il est formé à partir de 60 à 100 % en poids de demi-pâte fabriquée à partir de vieux papiers.
16. Papier au format selon la revendication 1, en le format DIN A4.
17. Utilisation de papier peu pelucheux selon l'une ou plusieurs des revendication précédentes en tant que papier pour copie.
18. Procédé de fabrication de papiers au format, contenant plus de 10 % en poids de fibres lignifiées, selon une ou plusieurs des revendications 1 à 16, en particulier par utilisation de veux papiers traités, ayant éventuellement subi un tri préalable, et en utilisant une ou plusieurs étapes de dissolution, de désen- crage, de tri et éventuellement de dispersion et de blanchiment, ainsi que pour la fabrication de papier sur la machine à papier,au cours de laquelle les peluches sont extraites pendant l'opération de découpage, caractérisé en ce qu'on procède à une extraction des peluches
(a) lors du découpage longitudinal,
(b) lors du transport vers le découpage transversal, et
(c) lors du découpage transversal du papierfabri- qué.
19. Procédé selon la revendication 18, caractérisé en ce qu'il est procédé à une extraction supplémentaire des peluches après le découpage transversal, pendant le transport et le tri.
20. Procédé selon les revendications 18 ou 19, caractérisé en ce qu'on procède à une filtration du bain d'encollage, qui circule en circuit fermé.
21. Procédé selon l'une ou plusieurs des revendications 18 à 20, caractérisé en ce que les feuilles de papier, passant éventuellement au-dessus de barres de rupture comportant un système intégré d'extraction des poussières par aspiration, reçoivent un courant d'air en coupe lors de la découpe longitudinale, et les paluches qui se forment sont classées par aspiration, puis la feuille continue, découpée longitudinalement, passe sur une table aspirante comportant des trous longitudinaux, de telle sorte que les bords longitudinaux de la feuille continue se trouvent exactement au-dessus des trous longitudinaux, par lesquels les peluches sont de nouveau extraites, puis, au niveau des lames transversales, les peluches sont de nouveau extraites ou aspirées par soufflage.
22. Procédé selon la revendication 21, caractérisé en ce que des peluches sont extraites de nouveau ou aspirées par soufflage dans le canal transversal, dans le cas des rames qui se forment.
23. Procédé selon la revendication 22, caractérisé en ce que la feuille continue ayant subi une coupe longitudinale passe sur des trous longitudinaux qui sont incurvés perpendiculairement au sens du transport des feuilles continues.
24. Procédé selon la revendication 22 ou 23, caractérisé en ce que l'extraction des poussières est renforcée par des brosses agissant au-dessus des trous longitudinaux.
25. Procédé selon l'une ou plusieurs des revendications 21 à 24, caractérisé en ce que des peluches sont en outre aspirées dans la zone des lames inférieures de la découpeuse longitudinale.
26. Procédé selon l'une ou plusieurs des revendications précédentes 18 à 25, caractérisé en ce qu'on utilise pour la fabrication de la demi-pâte des vieux papiers ayant subi un tri préalable, choisis parmi les déchets domestiques, les rognures d'illustrés, les bouillons d'impression, les journaux et les revues.
27. Procédé selon l'une ou plusieurs des revendications précédentes 18 à 26, caractérisé en ce que le vide, lors de l'aspiration des peluches dans la zone des lames inférieures et/ou au niveau de la table aspirante, pour des vitesses de coupe comprises entre 100 et 40 m/min, est maintenu entre environ 250 et 40 mbar.
EP84114648A 1984-12-03 1984-12-03 Papier format pauvre en poussière, procédé pour sa fabrication et son emploi Expired - Lifetime EP0183863B2 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT84114648T ATE46378T1 (de) 1984-12-03 1984-12-03 Staubarmes formatpapier, verfahren zu dessen herstellung und verwendung desselben.
DE8484114648T DE3479749D1 (en) 1984-12-03 1984-12-03 Format paper with a low dust content, process for its manufacture and its use
EP84114648A EP0183863B2 (fr) 1984-12-03 1984-12-03 Papier format pauvre en poussière, procédé pour sa fabrication et son emploi
JP60010700A JPS61132700A (ja) 1984-12-03 1985-01-22 紙粉の少ない規格版紙およびその製法と応用
DE19853517402 DE3517402A1 (de) 1984-12-03 1985-05-14 Staubarmes formatpapier, verfahren zu dessen herstellung und verwendung desselben
JP4327828A JPH0693588A (ja) 1984-12-03 1992-12-08 紙粉の少ない規格版紙

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84114648A EP0183863B2 (fr) 1984-12-03 1984-12-03 Papier format pauvre en poussière, procédé pour sa fabrication et son emploi

Publications (3)

Publication Number Publication Date
EP0183863A1 EP0183863A1 (fr) 1986-06-11
EP0183863B1 EP0183863B1 (fr) 1989-09-13
EP0183863B2 true EP0183863B2 (fr) 1991-10-23

Family

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EP84114648A Expired - Lifetime EP0183863B2 (fr) 1984-12-03 1984-12-03 Papier format pauvre en poussière, procédé pour sa fabrication et son emploi

Country Status (4)

Country Link
EP (1) EP0183863B2 (fr)
JP (2) JPS61132700A (fr)
AT (1) ATE46378T1 (fr)
DE (2) DE3479749D1 (fr)

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FI964403A0 (fi) * 1996-11-01 1996-11-01 Valmet Corp Foerfarande foer avlaegsnande av dam i samband med arkskaermaskin i cellulosatorkmaskin eller motsvarande och arrangemang foer genomfoerande av foerfarandet
DE10132897A1 (de) * 2000-07-25 2002-03-28 Heidelberger Druckmasch Ag Längsschneider mit Papierstaub-Absaugeinrichtung
JP4515612B2 (ja) * 2000-09-12 2010-08-04 リンテック株式会社 切断屑回収装置
DE10106672B4 (de) * 2001-02-14 2004-03-18 Koenig & Bauer Ag Längsschneideinrichtung
DE10108234B4 (de) * 2001-02-21 2004-03-18 Koenig & Bauer Ag Längsschneideinrichtung für eine materialbahn und Verfahren zur Reinigung der Längsschneideinrichtung
DE10122331B4 (de) * 2001-05-08 2005-07-21 Alpha Calcit Füllstoff Gesellschaft Mbh Verfahren zur Wiederverwertung von Spuckstoff sowie dessen Verwendung
DE10130741A1 (de) * 2001-06-19 2003-01-02 Bielomatik Leuze & Co Staubabsaugeinrichtung für Querschneider
JP2009002856A (ja) * 2007-06-22 2009-01-08 Ricoh Co Ltd 紙粉測定方法及び紙粉測定装置
DE102008024681A1 (de) * 2008-05-21 2009-12-03 WINKLER+DüNNEBIER AG Maschinengestelltraverse zur Lagerung einer drehbaren Schneidwalze zum Schneiden von Flachmaterialstücken oder Materialbahnen
JP2012035360A (ja) * 2010-08-06 2012-02-23 Toyota Motor Corp 切断装置
JP5906547B2 (ja) * 2014-07-23 2016-04-20 デュプロ精工株式会社 古紙再生処理装置の断裁装置及び古紙再生処理装置の断裁方法
ES2951025T3 (es) 2016-09-14 2023-10-17 Yoshino Gypsum Co Dispositivo de corte y aparato de fabricación que comprende dicho dispositivo de corte
IT201700117533A1 (it) * 2017-10-18 2019-04-18 Futura Spa Impianto per la trasformazione di materiale cartaceo
CN109397352B (zh) * 2018-11-08 2021-03-30 江苏鸿顺合纤科技有限公司 一种化纤丝切断用截断机

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Also Published As

Publication number Publication date
ATE46378T1 (de) 1989-09-15
DE3517402A1 (de) 1986-06-19
DE3479749D1 (en) 1989-10-19
DE3517402C2 (fr) 1987-04-09
JPH0693588A (ja) 1994-04-05
JPH0561399B2 (fr) 1993-09-06
JPS61132700A (ja) 1986-06-20
EP0183863B1 (fr) 1989-09-13
EP0183863A1 (fr) 1986-06-11

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