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
  • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
  • B65D65/02—Wrappers or flexible covers
  • B65D65/14—Wrappers or flexible covers with areas coated with adhesive
• • 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
  • D21H19/00—Coated paper; Coating material
  • D21H19/10—Coatings without pigments
  • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
  • D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D21H19/22—Polyalkenes, e.g. polystyrene
• • 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
  • D21H27/10—Packing paper

Definitions

• the present invention relates to a packaging sheet for routing, therefore intended for the mechanized packaging of documents (magazines, catalogs, etc.), sorted automatically and distributed by post.
• Plastic films due to their transparency, do not allow confidential shipments
• plastic films Another disadvantage of plastic films is their poor printability; they cannot be printed by any printing technique.
• Paper envelopes do not have these drawbacks, however, they do not allow packaging rates to be as rapid as those with plastic films: for plastic films, the packaging rate is approximately 2 to 5 times faster than for envelopes. This is explained by the need for complex folding and sealing of the envelopes.
• the Applicant intends to provide routing packaging which does not have the disadvantages of current packaging, namely to provide packaging which makes it possible in particular to have both high rates of mechanized packaging and postal sorting by optical reading. undisturbed.
• the Applicant has found that such a packaging sheet for routing can be obtained from an opaque paper support, in ⁇ rimable, autoscellable by means of a cold sealing adhesive, present at least partially on the internal face of said support.
• the paper support consists of fibers which are wholly or mainly cellulose fibers, fillers, in particular opacifying fillers (such as for example titanium dioxide, precipitated calcium carbonate, calcined kaolin) and papermaking additives such as as binders, retention or flocculation agents, wet strength agents, mass bonding agents, defoaming agents. It may also contain bactericides and dyes.
• fillers in particular opacifying fillers (such as for example titanium dioxide, precipitated calcium carbonate, calcined kaolin) and papermaking additives such as as binders, retention or flocculation agents, wet strength agents, mass bonding agents, defoaming agents. It may also contain bactericides and dyes.
• the support can also be obtained from old paper or recycled fibers.
• binders or reinforcing agents such as starch, polyvinyl alcohol or with surface bonding agents.
• the paper support is nuanced or colored, this gives it better opacity.
• the paper can be colored en masse and / or on one or two of its faces.
• the cold sealing adhesive is preferably based on natural rubber (polyisoprene) because it has the particularity of only sealing on itself. It is therefore not necessary to treat the other side (not coated with the adhesive) of the sheet in order to be able to wind the sheet and handle it easily.
• COLD SEAL cold-sealable adhesives
• the linear pressure to seal the sheet on itself is greater than or equal to 50 N / cm.
• the adhesive is colored; ced strengthens the opacity of the packaging sheet and therefore reduces the grammage of the sheet; thus we can save on postage depending on the weight of the package to be shipped.
• the opacity of the packaging sheet is greater than or equal to 75.
• the adhesive is deposited either so as to completely cover the internal face of the support or to only partially cover this face and this while allowing the packaging to be sealable on itself.
• the deposition of adhesive can be done by any known coating means. This can for example be done using an air knife coater, a CHAMPION bar coater (see Pulp and Paper, vol. IV, 3rd edition, pages 2152-2154) or by gravure printing.
• the adhesive can be deposited on the periphery of the packaging sheet, the sheet being sealed by application of the adhesive areas located opposite along a fold line or the sheet is cut around the magazine to be packaged and sealed on all around (on all four edges).
• the total coatings or grid of the support leave a great freedom of use of the packaging sheets, they do not impose any constraint of cutting and meticulous folding, they are independent of the format of the documents to be sent.
• the sealing force force to be used to open the packaging
• the face of the sheet which does not have any adhesive has a high level of bonding
• the COBB bonding measured according to standard ISO 535 is less than 25 g / m 2 .
• This bonding gives the packaging a high resistance to humid climatic conditions to which the package may be subjected during its postal delivery; indeed, it can be subjected to high humidity or rain during its distribution in letter boxes. Thus it will not be damaged and its content will be protected.
• the presence of the cold sealing adhesive does not interfere with the printing of the external face (which does not include any adhesive) whatever the printing technique (rotogravure, flexography, offset, typography, inkjet ).
• the packaging may include a transparent window so that the address can be read if it is included on the packaged magazine.
• a paper support is produced by wet process on a flat table paper machine from the following composition, the parts being expressed in dry weight:
• opacifying fillers titanium dioxide, precipitated calcium carbonate
• the sheet obtained is then treated in a size press with a mixture of binders (starch and polyvinyl alcohol), the recovery of this composition in dryness is 2.5 g / m 2 .
• the cold-sealable adhesive which is based on natural rubber, is deposited by coating with a Champion bar at a rate of 1.8 g / m 2 dry.
• the finished sheet has a basis weight of 60 g / m 2 .
• the finished sheet has an opacity of 90, measured according to ISO 2471.
• COBB bonding measured according to ISO 535 standard water, 1 minute, 23 ° C
• water, 1 minute, 23 ° C 20 g / m 2 , for the printable side (not covered with adhesive).
• the sheet can be printed before or after coating with adhesive by gravure or flexography without difficulty.
• the sheet is used on an automated packaging machine to package magazines; the sheet is cut, folded around the magazine and sealed under a linear pressure of 50 N / cm on two or three edges.
• the packaging rate is 5500 reviews per hour, which is almost as high as using plastic films for which it is 5800 reviews per hour.
• the average sealing force to separate two facing sheets sealed under a linear pressure of 50 N / cm is 1.16 N / cm-
• the paper having a good bonding, it is resistant to the humid climatic conditions to which it can be subjected during the postal delivery.
• a sheet is made as in Example 1 but with a lower grammage and a mixture of black dye and turquoise blue colored pigments has been added to the cold-sealable adhesive.
• the adhesive-dye composition is deposited dry at the rate of 4 g / m 2 .
• the grammage of the finished sheet is 54 g / m 2 .
• the sheet has an opacity of 90, therefore of the same level as that of the sheet of Example 1, although the grammage is lower.
• the COBB bonding of the in ⁇ rimable face is 20 g / m 2 .
• the average sealing force is id of 1.87 N / cm.
• the same advantages are observed as for example 1.
• Each strip is sealed on itself, a linear pressure of 50 N / cm is applied to the strip by passing it through a calender.
• the sealing force is measured, that is to say the force that must be exerted to separate the two facing parts, using a dynamometer fitted with a recorder, the speed of the cross member being 200 mm / min.
• the average between the minimum and the maximum recorded is obtained and the sealing force expressed in cN / 5 cm is obtained.
• the average sealing force is obtained by averaging the measured forces (for the forward and cross directions).

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Laminated Bodies (AREA)
• Wrappers (AREA)
• Paper (AREA)
• Packaging Of Special Articles (AREA)
• Adhesive Tapes (AREA)
• Adhesives Or Adhesive Processes (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9460074

Family Applications (1)

Country Status (13)

Cited By (2)

Citations (2)

Family Cites Families (3)

• 1994
  • 1994-02-15 FR FR9401678A patent/FR2716168B1/fr not_active Expired - Lifetime
• 1995
  • 1995-02-10 AT AT902095A patent/AT405539B/de not_active IP Right Cessation
  • 1995-02-10 GB GB9617172A patent/GB2301333B/en not_active Expired - Fee Related
  • 1995-02-10 WO PCT/FR1995/000161 patent/WO1995021963A1/fr not_active IP Right Cessation
  • 1995-02-10 ES ES9550041A patent/ES2130019B1/es not_active Expired - Fee Related
  • 1995-02-10 CH CH295995A patent/CH686730A5/fr not_active IP Right Cessation
  • 1995-02-10 DE DE19581507T patent/DE19581507T1/de not_active Withdrawn
  • 1995-02-10 NL NL9520016A patent/NL9520016A/nl not_active Application Discontinuation
  • 1995-02-14 BE BE9500114A patent/BE1007988A3/fr not_active IP Right Cessation
• 1996
  • 1996-08-09 SE SE9602951A patent/SE9602951L/ not_active Application Discontinuation
  • 1996-08-13 DK DK085596A patent/DK85596A/da not_active Application Discontinuation
  • 1996-08-14 NO NO963390A patent/NO963390L/no unknown
  • 1996-08-14 FI FI963179A patent/FI963179A/fi unknown

Patent Citations (2)

Non-Patent Citations (4)

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