EP0476040A1 - Papier d'emballage gaufre. - Google Patents

Papier d'emballage gaufre.

Info

Publication number
EP0476040A1
EP0476040A1 EP90909795A EP90909795A EP0476040A1 EP 0476040 A1 EP0476040 A1 EP 0476040A1 EP 90909795 A EP90909795 A EP 90909795A EP 90909795 A EP90909795 A EP 90909795A EP 0476040 A1 EP0476040 A1 EP 0476040A1
Authority
EP
European Patent Office
Prior art keywords
paper
distance
embossed
figures
lines
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
EP90909795A
Other languages
German (de)
English (en)
Other versions
EP0476040B1 (fr
Inventor
Lilja Evert Roland
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.)
ASSIDOMAEN KRAFT PRODUCTS AB
Original Assignee
Mo och Domsjo 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
Application filed by Mo och Domsjo AB filed Critical Mo och Domsjo AB
Publication of EP0476040A1 publication Critical patent/EP0476040A1/fr
Application granted granted Critical
Publication of EP0476040B1 publication Critical patent/EP0476040B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/005—Anti-slip or anti-skid bags, e.g. bags provided with anti-slip coating, ribs, strips

Definitions

  • embossing patterns that hitherto have been used on sacks, have meant that the sack material has shown bosses and, possibly, even recesses, relative to the original plane of the material. The thought has been that, by the piling of filled sacks, the bosses will be locked by the parts not em- bossed (alt. recesses) in the sack lying closest underneath.
  • a classification of embossing patterns earlier used for sacks, is:
  • the patterns are straight-lined, from each other separated and over the paper plane even distributed and provided with three, four or more sides and planar figure surface which is parallel with and situated at a distance of 0.05-0.40 mm from the sur ⁇ rounding paper surface and having a total figure area constituting 40% of the total paper area and
  • connection surface between figure surface and surrounding paper surface is substantially perpen ⁇ dicular to the paper plane.
  • the pattern, according to the above, will even obtain a friction increasing effect on wrapping paper when goods, that have been wrapped in the paper, are piled one above the other.
  • wrapping paper is meant a paper, where the main part of the fibre material (e.g. 70%, w/w) usually originates from a long-fibred wood, such as spruce or pine.
  • the fibre material is usually sulphate pulp and may be bleached or unbleached. Recycled fibres may be present in a greater or lesser extent.
  • Several of the kinds of paper that are referred to, e.g. sack paper may well be clopacked (creped). Normally, fillers are not pres- ent in the paper, and if they to some degree do, the amount usually is ⁇ ?10% (w/w), such as (w/w).
  • tensile energy absorption index be men ⁇ tioned, which, in the longitudinal direction of the paper ought to be 0.4 kJ/kg, and in its cross direction ⁇ 0.3 kJ/kg.
  • the elongation in the longitudinal direction usually is 3*1% (in case of wrapping paper of a somewhat better qual ⁇ ity ⁇ 2%) and in the cross direction 2.0% (appreciably >3.5%).
  • 7 kJ/kg, 6 kJ/kg, 20% respecively 15% are valid.
  • High values of ten ⁇ sile energy absorption index and elongation indicate high- qualitative products.
  • longitudinal direction the machine direction of the paper is current, which, in most cases, also is the main direction of the fibres.
  • Cross di ⁇ rection is perpendicular to longitudinal direction.
  • the figures of the embossing patterns may be straight- lined triangles (triangles), quadrangles, pentagons etc., whereby quadrangles are preferred, and especially of the kind in which there are sides parallel in pairs, like in parallelograms, for example of the kind equilateral.
  • the pattern figures according to the invention show an even-numbered symmetry axis, which, at the most, is four-numbered.
  • all the figures of the pattern are identical, even if, for some pat- terns, may occur, that an improved friction paper to paper is achieved if 2, 3, 4 or more different kinds of figures exist.
  • the paper according to the invention may, along one or both of its longitudinal sides, have an outer zone lacking the evenly distributed embossing figures.
  • the figures in these zones may be less distinct because they are not raised as much out of the original paper plane as the more central parts, or because the angle between figure plane and the connection surface to the original paper plane is greater"than 90°. Outer zones of this kind are 1-2 dm, if they exist in the wrapping paper.
  • Normal pattern frequency usually is below 500, such as
  • 10-100 may
  • the total pattern area is 40% and usually £0.5% (preferably above 1%) of the total pattern area. It has been shown, that very good improvements in the friction paper to paper may be achieved, if the total figure area is below 30%, such as be ⁇ low 20% or below 10% of the total pattern area.
  • improved friction properties is meant, that the im ⁇ provement i_ >1%. such as £5%, relative to corresponding unembossed paper (the friction coefficient for paper to paper measured in any direction) . The way of measuring is given in the. experimental part.
  • the orientation of the pattern figures shall preferably be of that kind, that the machine direction of the paper di ⁇ vides an angle in the figures in substantially two (+/- 10°) equally large angles. If an acute angle exists in the fig ⁇ ures it is preferably such a one that is divided.
  • the figures consist of parallelogram. These are shown in figure A and can be defined by the help of a checked pattern, which arises if a first number of parallel, straight lines 1,. 1 2 l3_....ln are intersected by a second number of parallel, straight lines 1' , 1' 1' ...1' at an angle 3 .
  • the lines extend over the width of the paper, n and n are integers which may be even or uneven and are always greater than 10. The exact number of lines is determined by the distance between them, their slope in relation to the width and the width of the sack paper.
  • the perpendicular distance between the lines in one group are alternating, and is
  • the angle y fulfills the condition 10° / 6 - ⁇ . 170°, such as 10° ⁇ /5 90° or 90° ⁇ . ⁇ 170°.
  • the lines 1- , 1 , 1 1 have a positive slope and that the lines 1', -L. I 1 t -. l'
  • ...1 have a negative slope compared with the machine di- rection of the paper.
  • the angle ⁇ is readily divided in half by the machine direction.
  • FIGS 1-6 show examples of patterns in question seen from above.
  • the machine direction of the papers is in ⁇ dicated with a double-arrow [ ⁇ -->].
  • the angle y ⁇ is 60° and the figure frequency is 39
  • the symmetry axis is two-numbered.
  • the machine direction divides the angle /3 in half.
  • the figure frequency is 28 pieces/dm .
  • the symmetry axis of the figures is two-numbered.
  • the angle ⁇ is 30° and is divided in half by the machine direction.
  • the symmetry axis of the pattern is
  • the figure frequency is 48 pieces/dm .
  • the angle & is
  • the symmetry axis is four-
  • the figure frequency is 49 pieces/dm .
  • Figure 5 shows a paper whose pattern is rather like the one in the preceding figure, but whith smaller squares and greater figure frequency.
  • Figure 6 shows a paper according to the invention where a c .d 4b .
  • the angle fl is 90° and is divided in half by the machine direction.
  • the symmetry axis of the figures is
  • the figure frequency is 32 pieces/dm .
  • One aspect of the invention is a method for manufactur ⁇ ing a wrapping paper, preferably sack paper, containing the pattern defined above, by way of embossing a web of sack paper.
  • the paper web as such is manufactured in a way for wrapping paper known per se, and means in the preferred em ⁇ bodiments of the invention a clopacking stage.
  • the embossing is carried out by allowing the paper web, after a possibly clopacking, pass through a roll nip, where one of the rolls is softer than the other (pressing- respectively embossing roll).
  • the harder of the rolls has an en ⁇ velope surface which suitably is made of metal (e.g. steel or cast iron) or another hard material.
  • Its envelope surface shows for the wrapping paper of the invention said pattern provided with evenly distributed, raised and identical fig ⁇ ures with differences which are due to that the envelope surface not is made of paper.
  • the raise of the figures shall be somewhat larger than the corresponding raise in the embossed paper.
  • the roll may well be constructed so it can be heated, in order that the paper will dry as fast as possible after the embossing. The paper will partly then more easily lift from the roll and the embossing pattern will partly be freezed more effective ⁇ ly, which, at the same time, makes it more stable. The best, therefore, is if the roll is constructed in a usual way as a drying cylinder in a paper machine, i.e. hollow with an in ⁇ let for hot steam (approx.
  • the roll is suitably made from a roll provided with a smooth envelope surface by brooching out recesses corresponding to the surface between lines with the distances b and d between each other (see the above). The depth of the recesses lies in the above mentioned interval.
  • the pressing roll is made of elastic material which per ⁇ mits that the figures of the embossing roll can be complete ⁇ ly impacted in the material when the rolls are pressed against each other.
  • An excellent material is rubber, e.g. hard rubber.
  • the pressing roll is suitably cambered to per- mit an even line pressure along itself during the embossing.
  • a suitable embossing pressure depends on fac ⁇ tors such as the raise of the figures out of the envelope surface, the hardness of the pressing roll, the thickness of the paper, choice of fibre material, speed in the head box
  • the embossing pressure is 1-10 kp/cm .
  • the embossing most suitably should be carried out at a dry solids content of 60-80%, preferably
  • One aspect of the invention is a sack, which surface wholly or partially shows the embossing pattern mentioned above.
  • the sack material may wholly or partially be made of plastic or paper.
  • the pattern consists of a plurality of out of the surface of the sack raised, delimited patterns which are identical. Characterizing features are;
  • the patterns are straight-lined, from each other sepa ⁇ rated and evenly distributed over the patterned surface and are provided with three, four or more sides and a planar figure surface which is parallel with, and situ ⁇ ated at a distance of 0.05-0.40 mm from the surrounding sack surface and with a total figure area that consti ⁇ tutes ⁇ 40 of the total paper area and
  • connection surface between figure surface and the surrounding sack surface is substantially perpendicular to the sack surface.
  • the same is valid for the sack as for the em ⁇ bossing pattern of the paper with regard to that the em ⁇ bossed surface does not need to be made of paper.
  • the embossed surface does not have any machine di ⁇ rection
  • the machine direction of the paper is meant the height direction of the sack. If only parts of the sack surface are covered with the embossing pattern, it is suit ⁇ ably on the upper or lower side of the sack, i.e. those sides of the sack that by piling lies against other sacks.
  • the sack according to the invention is constructed in a manner known for sacks per se, in which the sack material may consist of one to six different layers, so called sheets, in which the outermost sheet, according to the in ⁇ vention, preferably is made of paper.
  • the embossing pattern is situated on the outer layer or, as an alternative, is glued on in the form of embossed sheet of plastic or paper.
  • sacks By the manufacturing of sacks, one is starting from one or more rolls of web formed sack material, which are just as broad as the circumference of the sack including that part (for example paste joints) which shall be used to form the web material into a longitudinal tube.
  • a roll For each sheet a roll is used, by which that web material which shall be in the outside of the sack (outer web) shall be embossed with any of the patterns given above, or if it is not, it is moisten ⁇ ed, embossed and dried in connection to the unwinding.
  • the different webs of material are stored, by the unwinding, continuously one upon the other, whereafter the in that way obtained, possibly multiple sheeted web material, continu ⁇ ously is formed and joined together (pasted together) into a tube.
  • Sack paper taken from the paper machine at a dry solids content of approx. 65%, has been embossed in a laboratory press under conditions intended, as far as possible, to be equal to embossing in the paper machine.
  • Paper in the form of sheets were taken out from the paper machine at a dry solids content of approx. 65% during change of quality.
  • the sheets were stored in plastic bags in order to prevent drying until the embossing had been carried out.
  • the paper sheets were embossed under static conditions in a laboratory press by the help of a steel plate provided with a desired pattern. Patterns that were studied, are evi- dent from the figures 1-6. The embossing was carried out at
  • the tensile strength is scarcely affected by the em ⁇ bossing while the extension seems to decrease somewhat, which results in a tensile energy absorption decrease of up to 20% in the longitudinal, and up to 16% in the cross di ⁇ rection.
  • the air resistance increases up to 12 units, from 29 to 41 s.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Wrappers (AREA)
  • Paper (AREA)
  • Sanitary Thin Papers (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Medicinal Preparation (AREA)
  • Materials For Medical Uses (AREA)
  • Buffer Packaging (AREA)

Abstract

L'invention concerne un papier d'emballage gaufré, de préférence un papier d'ensachage, dont la configuration de gaufrage présente une pluralité de figures identiques séparées, surélevées par rapport au plan du papier. (A) Les figures sont rectilignes, séparées les unes des autres, réparties de manière régulière sur le plan du papier et comportent trois ou quatre côtés ou plus ainsi qu'une surface de figure plane, parallèle à la surface du papier qui les entourent, et située à une distance comprise entre 0,05 et 0,40 mm de cette dernière, la surface totale de la figure étant 40 % de la surface totale du papier gaufré. (B) La surface qui relie la surface de la figure et la surface du papier est en gros perpendiculaire au plan du papier.
EP90909795A 1989-06-09 1990-05-31 Papier d'emballage gaufre Expired - Lifetime EP0476040B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8902083A SE502689C2 (sv) 1989-06-09 1989-06-09 Präglat förpackningspapper vars präglingsmönster uppvisar en mångfald upphöjda, avgränsade, identiska, figurer
SE8902083 1989-06-09

Publications (2)

Publication Number Publication Date
EP0476040A1 true EP0476040A1 (fr) 1992-03-25
EP0476040B1 EP0476040B1 (fr) 1994-03-02

Family

ID=20376227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90909795A Expired - Lifetime EP0476040B1 (fr) 1989-06-09 1990-05-31 Papier d'emballage gaufre

Country Status (10)

Country Link
EP (1) EP0476040B1 (fr)
AT (1) ATE102152T1 (fr)
DE (1) DE69007105T2 (fr)
DK (1) DK0476040T3 (fr)
ES (1) ES2049980T3 (fr)
FI (1) FI98142C (fr)
IE (1) IE63811B1 (fr)
NO (1) NO178145C (fr)
SE (1) SE502689C2 (fr)
WO (1) WO1990014998A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6347480B1 (en) * 1997-07-07 2002-02-19 Southpac Trust International, Inc. Method for wrapping a floral grouping with a sheet of material constructed of paper and having printed and embossed patterns thereon
WO1995000405A1 (fr) * 1993-06-28 1995-01-05 Dowbrands Inc. Sac plastique souple a motifs decoratifs
SE9904298D0 (sv) * 1999-11-26 1999-11-26 Assidomaen Ab Embossment Pattern
SE523870C2 (sv) * 2001-02-12 2004-05-25 Korsnaes Ab Präglat högflexibelt papper och ett förfarande för framställning därav
DE102014006815A1 (de) * 2014-05-08 2015-11-12 Mondi Ag Papiersack und Verfahren zur Herstellung eines Papiersacks
US11440305B2 (en) * 2017-06-26 2022-09-13 David Paul Goodrich Embossed paper in combination with paper cushioning for shipping envelopes
USD983047S1 (en) 2021-05-19 2023-04-11 S. C. Johnson & Son, Inc. Storage bag

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2917223A (en) * 1955-10-19 1959-12-15 Cromwell Paper Co Non-slip bag
US3495761A (en) * 1968-04-16 1970-02-17 Hudson Pulp & Paper Corp Embossed kraft paper and paper bags made therefrom
US3904465A (en) * 1970-02-20 1975-09-09 Mobil Oil Corp Process and apparatus for the manufacture of embossed film laminations
DE3437414C2 (de) * 1984-10-12 1994-08-04 Nordenia Verpackung Gmbh Vorrichtung zur Bearbeitung von als Folienbahn vorliegenden Kunststoffolien sowie bearbeitete Kunststoffolie

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9014998A1 *

Also Published As

Publication number Publication date
WO1990014998A1 (fr) 1990-12-13
IE902068L (en) 1990-12-09
NO914614D0 (no) 1991-11-25
ES2049980T3 (es) 1994-05-01
ATE102152T1 (de) 1994-03-15
DE69007105T2 (de) 1994-09-08
NO914614L (no) 1991-11-25
DE69007105D1 (de) 1994-04-07
NO178145C (no) 1996-01-31
FI98142B (fi) 1997-01-15
IE63811B1 (en) 1995-06-14
FI98142C (fi) 1997-04-25
SE502689C2 (sv) 1995-12-11
SE8902083L (sv) 1990-12-10
SE8902083D0 (sv) 1989-06-09
EP0476040B1 (fr) 1994-03-02
FI915767A0 (fi) 1991-12-05
NO178145B (no) 1995-10-23
DK0476040T3 (da) 1994-03-28

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