US3477906A - Shrinkage of web material such as paper - Google Patents

Shrinkage of web material such as paper Download PDF

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Publication number
US3477906A
US3477906A US532839A US3477906DA US3477906A US 3477906 A US3477906 A US 3477906A US 532839 A US532839 A US 532839A US 3477906D A US3477906D A US 3477906DA US 3477906 A US3477906 A US 3477906A
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United States
Prior art keywords
paper
roll
web
shrinkage
web material
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Expired - Lifetime
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US532839A
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English (en)
Inventor
Lars Rabstad
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M Peterson & Son As
Peterson & Son As M
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Peterson & Son As M
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Priority claimed from SE1352763A external-priority patent/SE301085B/xx
Application filed by Peterson & Son As M filed Critical Peterson & Son As M
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Publication of US3477906A publication Critical patent/US3477906A/en
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    • 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
    • D21H5/24—Special paper or cardboard not otherwise provided for having enhanced flexibility or extensibility produced by mechanical treatment of the unfinished paper
    • D21H5/245—Special paper or cardboard not otherwise provided for having enhanced flexibility or extensibility produced by mechanical treatment of the unfinished paper obtained by compressing the (moist) paper in directions lying in, and optionally perpendicular to, the paper plane, e.g. plain-surfaced Clupak papers
    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/005—Mechanical treatment

Definitions

  • SHRINKAGE 0F WEB MATERIAL SUCH AS PAPER Filed March 9, 1966 INVENTOR L423 P053 7790 ATTORNEY United States Patent O 3,477,906
  • SHRINKAGE F WEB MATERIAL SUCH AS PAPER Lars Rabstad, Moss, Norway, assignor to M. Peterson & Son A/S, Moss, Norway, 2: company of Norway Filed Mar. 9, 1966, Ser. No. 532,839 Int. Cl. D21f 11/00; D21h /06, 5/24 US. Cl.
  • This present invention relates to the operation of a socalled shrinkage presses, by means of which web material, particularly paper, is treated in order to acquire a better extensibility. More specifically the invention relates to presses, in which the web material is passed through a press nip where an elastic layer is pressed against a hard heated surface running at a slightly different speed.
  • the object of the invention is to eliminate said diff ficulty so that it is not necessary to see to it very carefully that the paper web runs exactly correctly, and nevertheless a long life of the elastic layer can be ex pected.
  • said object is realised in that a lubricant is supplied to those places of the press nip where the elastic layer is not held separated by the treated Web material from the roll surface but is in direct contact therewith.
  • the treated paper web may, without hesitation, be given a smaller width than the axial length of the pressure nip of the roll.
  • FIGURE 1 is an end cross sectional view of apparatus utilizing the process for applying lubricant to prevent shrinkage of web material such as paper;
  • FIGURE 2 is a top plan elevation view of apparatus utilizing the process for lubricating to prevent shrinkage of web material such as paper.
  • the paper web 2 to be treated is caused to pass in a moist condition through a press nip 3 formed by two rolls, 4 and 6; one roll 4 is provided with a surface layer of an elastic and resilient material 3,477,906 Patented Nov. 11, 1969 8, preferably rubber, while the other roll 6 is made with a hard and smooth metallic surface 10.
  • the rolls are connected mechanically or electrically in such fixed mutual relation that the hard roll is driven with a peripheral speed about 10 to 20 percent higher than that of the rubber-clad roll.
  • the rolls are pressed against each other with a line pressure of up to 30 kgs, per cm. and thehard roll 6 is heated to between 50 to C.
  • :It is diificult to guide the paper web so that its position always coincides with the press nip accurately. If the ,edges of the web would reach outside the press nip, which may be caused by a quite normal transverse movement of the web by a few centimeters, its edges will be untreated and therefore not shrunk in the longitudinal direction, but will take on a wavy or crinkled contour making it diflicult to wind up the web with the use of conventional equipment for that purpose.
  • the soft roll 4 will have a comparatively short life and must be replaced, which involves work stops and costs.
  • the paper web may very well be of a somewhat smaller width than the length of the common generatrix of the rolls and nevertheless a durable shrinkage press can be obtained without a too restricted choice of materials for the surface layers of the rolls rubbing against each other.
  • the lubricant should be chosen with regard to the particular requirements of this special case.
  • said lubricant should preferably not have any influence upon the character of the paper when used, as is the case e.g. with certain silicon oils which may impart such a low surface friction to kraft paper that pasting thereof is diflicult and bags manufactured thereof are hard to pile.
  • Another condition which may decide the choice of lubricants in certain cases is, that the same should be unrestrictedly miscible with water and not have any detrimental influence upon the web forming in a paper making machine. Then it is possible to dissolve the edges trimmed off the shrunk paper and to use the pulp obtained therefrom for the forming of paper anew upon the wire of the paper making machine.
  • the lubricant should be inert, so that it does not cause chemical or physical reactions that change the dimensions of the roll surfaces after some time of use, nor otherwise change the desired qualities of the materials.
  • soapy water which will do as lubricant if the speed is held low, e.g. 5 to 25 meters per minute, and the temperature of the warm roll is held at 80 C. at the most;
  • a suitable lubricant for more exacting working conditions reacts upon the choice of material for the surface layer of the soft roll.
  • other elastomers must be chosen, particularly high polymers which, either pure or in admixture with natural rubber and by various treatments and other additions, may be given the desired physical qualities, including ability to be lubricated during the prevailing conditions.
  • a neoprene-covered roll has a considerably longer life when lubricated with certain polar substances which are miscible with water.
  • Such substances can be, for example, polyhydric alcohols, esters, aldehydes, amides, and so forth.
  • Particularly suitable are compounds having a high boiling point and a high viscosity as well as a weak swelling influence upon the elastic material.
  • the latter also involves that fillers in the elastic material should not be influenced either.
  • a lubricant which has proved highly satisfactory, is glycerin.
  • the lubricant may be supplied by letting it drip onto or by spraying it upon one roll or both rolls at the ends thereof that come into direct contact with each other.
  • the invention is applicable not only to a shrinking press of the kind mentioned above and known e.g. from the US. Patent No. 3,104,197, but also to a shrinking press similar to that shown in the US. Patent No. 2,624,245 and in which the elastic layer consists of an endless blanket running in a loop and pressed by means of a sustaining roll or any other sustaining member against a heated hard roll.
  • the elastic layer consists of an endless blanket running in a loop and pressed by means of a sustaining roll or any other sustaining member against a heated hard roll.
  • a continuous process of producing a web material having extensibility in a longitudinal direction comprising the steps of:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
US532839A 1963-12-06 1966-03-09 Shrinkage of web material such as paper Expired - Lifetime US3477906A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1352763A SE301085B (US20050045294A1-20050303-C00001.png) 1963-12-06 1963-12-06
US53283966A 1966-03-09 1966-03-09

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US3477906A true US3477906A (en) 1969-11-11

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US532839A Expired - Lifetime US3477906A (en) 1963-12-06 1966-03-09 Shrinkage of web material such as paper

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US (1) US3477906A (US20050045294A1-20050303-C00001.png)
FI (1) FI42163B (US20050045294A1-20050303-C00001.png)
GB (1) GB1029730A (US20050045294A1-20050303-C00001.png)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3957573A (en) * 1971-11-09 1976-05-18 Dainichi-Nippon Cables, Ltd. Process for producing insulating paper where the paper is frictionally calendered
US5137600A (en) * 1990-11-01 1992-08-11 Kimberley-Clark Corporation Hydraulically needled nonwoven pulp fiber web
US5700356A (en) * 1996-01-19 1997-12-23 Lefkowitz; Leonard R. Air permeable belt for dewatering web in press nip
US5801107A (en) * 1993-06-03 1998-09-01 Kimberly-Clark Corporation Liquid transport material
WO2000078534A1 (en) * 1999-06-18 2000-12-28 Marquip, Inc. Single facer with resilient small diameter corrugating roll

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3011545A (en) * 1958-01-20 1961-12-05 Clupak Inc Pressure loading means for traveling blankets
CA633128A (en) * 1961-12-19 Clupak Method and apparatus for making extensible fibrous webs
US3035512A (en) * 1958-05-19 1962-05-22 Clupak Inc Flexible nip loading arrangement
US3122469A (en) * 1958-01-20 1964-02-25 Clupak Inc Modified web material and the manufacture thereof
US3329562A (en) * 1960-06-01 1967-07-04 Clupak Inc Apparatus for producing uncreped extensible paper

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA633128A (en) * 1961-12-19 Clupak Method and apparatus for making extensible fibrous webs
US3011545A (en) * 1958-01-20 1961-12-05 Clupak Inc Pressure loading means for traveling blankets
US3122469A (en) * 1958-01-20 1964-02-25 Clupak Inc Modified web material and the manufacture thereof
US3035512A (en) * 1958-05-19 1962-05-22 Clupak Inc Flexible nip loading arrangement
US3329562A (en) * 1960-06-01 1967-07-04 Clupak Inc Apparatus for producing uncreped extensible paper

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3957573A (en) * 1971-11-09 1976-05-18 Dainichi-Nippon Cables, Ltd. Process for producing insulating paper where the paper is frictionally calendered
US5137600A (en) * 1990-11-01 1992-08-11 Kimberley-Clark Corporation Hydraulically needled nonwoven pulp fiber web
US5801107A (en) * 1993-06-03 1998-09-01 Kimberly-Clark Corporation Liquid transport material
US5700356A (en) * 1996-01-19 1997-12-23 Lefkowitz; Leonard R. Air permeable belt for dewatering web in press nip
WO2000078534A1 (en) * 1999-06-18 2000-12-28 Marquip, Inc. Single facer with resilient small diameter corrugating roll
US6170549B1 (en) * 1999-06-18 2001-01-09 Marquip, Inc. Single facer with resilient small diameter corrugating roll

Also Published As

Publication number Publication date
FI42163B (US20050045294A1-20050303-C00001.png) 1970-02-02
GB1029730A (en) 1966-05-18

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