Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
  • B41M5/52—Macromolecular coatings
  • B41M5/5218—Macromolecular coatings characterised by inorganic additives, e.g. pigments, clays
• • 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
  • D21H19/36—Coatings with pigments
  • D21H19/38—Coatings with pigments characterised by the pigments
  • D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
  • B41M5/52—Macromolecular coatings
  • B41M5/5254—Macromolecular coatings characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
• • 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
  • D21H19/36—Coatings with pigments
  • D21H19/38—Coatings with pigments characterised by the pigments
  • D21H19/385—Oxides, hydroxides or carbonates
• • 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
  • D21H19/36—Coatings with pigments
  • D21H19/38—Coatings with pigments characterised by the pigments
  • D21H19/42—Coatings with pigments characterised by the pigments at least partly organic
• • 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
  • D21H19/36—Coatings with pigments
  • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
  • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D21H19/60—Polyalkenylalcohols; Polyalkenylethers; Polyalkenylesters
• • 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
  • D21H19/66—Coatings characterised by a special visual effect, e.g. patterned, textured
• • 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
  • D21H19/80—Paper comprising more than one coating
  • D21H19/84—Paper comprising more than one coating on both sides of the substrate
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
  • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]

Definitions

• the present invention relates to an offset printing process using a coated paper with a pigmented composition comprising silica.
• the sheet-fed offset printing method with air drying of inks one of the most common printing processes, has among other requirements that of requiring a drying time of the inks used sufficiently short to allow use fast sheets once printed.
• “Traditional free air drying offset ink” (or ambient air) means offset inks traditionally used in the offset printing process which normally dry in air and at ambient temperature on the printed sheet. by oxidation polymerization and penetration of a portion of the vehicle of the ink. The drying of these inks does not require a particular energy input such as infra-red heating or UV or electron radiation treatment.
• said traditional offset inks normally drying in the open are “quadri” offset inks used on coated and uncoated papers intended for the packaging and packaging markets. publishing.
• the structure of the layer is extremely closed because the manufacturing process requires pronounced calendering or they are obtained by molding the layer on a chrome roll called cast-coating; the drying problem of the inks intensifies, the ink being difficult to penetrate into the paper and to dry.
• a solution to this problem would be to increase the absorption of the offset ink by the paper layer by the addition of additives in the layer, however, this may cause the lack of transvision (i.e. say the visibility on the back of the sheet of the impression made on the front).
• silica is a little used pigment in modern coating processes using compositions with high content of dry materials because of its rheological characteristics unfavorable.
• Silica is mainly used for papers intended for inkjet printing where the requirements are specific and very different from those of the offset process.
• silica is known for its ability to immobilize the ink on the surface of a paper thus reducing the transvision defect, but with the risk of causing an increase in the drying time of the ink.
• the Applicant has found that it is possible to reduce the drying time of traditional free-drying inks printed on coated paper by incorporating a small amount of silica into the pigmented composition of the layer present in the paper. surface of the paper, without significantly disturbing the rheological properties of the pigmented composition used, and in particular whether it is a matte coated paper or a glossy coated paper or an iridescent coated paper.
• the invention thus provides an offset printing process using an offset printing printable coated paper with conventional offset inks drying in the open air characterized in that said paper comprises, on at least one of its faces, a printable surface layer formed of a pigmented composition comprising at least one binder and pigments, including silica pigments in an amount between 0.1 and 15% of the total dry weight of pigments of said composition, and as pigments other than silica, the pigments chosen from calcium carbonates, kaolins, talc, titanium dioxide, coating plastic pigments, special pigments with optical and / or decorative effects, and their mixtures.
• a pigmented composition comprising at least one binder and pigments, including silica pigments in an amount between 0.1 and 15% of the total dry weight of pigments of said composition, and as pigments other than silica, the pigments chosen from calcium carbonates, kaolins, talc, titanium dioxide, coating plastic pigments, special pigments with optical and / or decorative effects, and their mixtures.
• said coated paper is offset-printable with conventional offset inks drying in the open air with a drying time of less than 40 minutes, preferably less than or equal to about 30 minutes.
• the silica content, by dry weight is between 0.5 and 15% of the total dry weight of the pigments of the surface layer. More particularly, the silica content, in dry weight, is between 1 and 11% of the total dry weight of the pigments of said surface layer.
• the dry layer weight of the surface layer applied to at least one of the faces of the paper is between 2 and 30 g / m 2 per side. More particularly, the weight of the surface layer is between 2 and 20 g / m 2 dry, per side.
• the surface layer according to the invention comprises at least one binder which may be chosen from polyvinyl alcohol, styrene / butadiene copolymers (used in particular in the form of latex), and mixtures thereof.
• the invention makes it possible to provide an offset printing process using papers having relatively high levels of plastic pigments used to impart gloss; said surface layer may comprise at least 5%, in particular at least 15% of dry weight plastic pigments, of the total dry weight of the pigments.
• said paper has a gloss degree, measured at 75 degrees according to ISO 2813, greater than or equal to 90.
• Said invention makes it possible to provide an offset printing process using ultra-gloss papers by incorporating unusual levels of plastic pigments into said surface layer, said surface layer possibly comprising between 15% and 60% of plastic pigments, preferably at least 30%, more preferably at least 50% of dry weight plastic pigments, of the total dry weight of the pigments.
• the high-gloss gloss papers usable according to the invention are in particular printable with a drying time of said offset inks less than or equal to about 20 minutes.
• the invention also makes it possible to provide an offset printing method using an offset printing paper on both sides with a fast drying time of traditional offset inks drying in the open air.
• the invention provides an offset printing method using paper which is characterized in that it is coated on both sides of said surface layer.
• the offset-printable surface layer of the coated paper that can be used according to the invention can be deposited by any coating (coating or surfacing or impregnation) means. Preferably, it is deposited by a blade coating process or by an outline coating process such as air-lay coating or curtain coating.
• the paper may be based on any fibrous sheet, in particular the fibrous base is made by papermaking from cellulosic fibers and / or synthetic fibers.
• the offset-printable coated paper that can be used according to the invention may comprise, on at least one of its faces, in addition to the printable surface layer further comprising silica pigments in a small quantity, at least one other layer of composition. pigmented composition comprising pigments and at least one binder.
• the other one or more layers of pigment composition of said offset-printable coated paper are defined as underlays, i.e., lying below the offset-printable surface layer, they may be be deposited (s) by any means of coating (coating or surfacing or impregnation).
• one or more pigmented sub-layers can be deposited at a rate of 2 to 20 g / m 2 in sec per side, and by undercoat according to the coating method used.
• said one or more sublayer (s) of pigmented composition may be applied by means of a gluing press on the paper machine on which the paper base is produced.
• the gluing press may be of the conventional type or it may be a modified model, for example a "Speedsizer” as marketed by Voith.
• a first underlayer may be coated in a size press and a second pigmented sub-layer may be applied by blade coating, for example.
• the dry weight of application of a pigmented sub-layer is between 4 and 20 g / m 2 by face.
• the binder used in the pigment composition sub-layer (s) of the coated paper of the invention may be a styrene / butadiene copolymer, in particular carboxylated (used in latex form) and / or other conventional coating binders such as for example, an amido and / or a polyvinyl alcohol.
• a coated paper that can be used according to the invention has a grammage of between 80 and 500 g / m 2 , more particularly between 90 and 400 g / m 2 (measurement according to the ISO 536 standard).
• the invention also relates to the use of an offset-printable coated paper as defined above in an offset printing process with traditional offset inks drying in the open air.
• a coated paper has the characteristic of being printable with traditional offset inks drying in the open by offset printing and with a drying time of said printed inks less than 40 minutes, preferably less than or equal to about 30 minutes.
• the invention also relates to the use of a pigmented composition comprising at least one binder and pigments, including silica pigments in an amount of between 0.1 and 15% of the total dry weight of the pigments of said composition, for coating a sheet of paper on at least one of its faces and rendering said sheet printable by offset printing with traditional in-line drying inks so that said inks dry in less than 40 minutes after printing.
• a pigmented composition as defined above is used.
• the said pigmented composition is used to produce a coated paper as defined above.
• a paper having a basis weight of 90 g / m 2 was produced on the surface of which was applied by means of a gluing press 8 g / m 2 total dry weight (4 g / m 2 per side) of a pigmented layer composed of calcium carbonate and starch.
• a pigmented composition made in an aqueous medium comprising, in parts by weight dry for 100 parts in total dry weight of pigments:
• Calcium carbonate 100 shares (mixture of 75% and 95% carbonates having an average size ⁇ 2 ⁇ m)
• Binder styrene-butadiene copolymer (used in latex form): 10 parts
• PVA 0.5 part
• Optical brightener 0.7 shares
• This paper is tested by offset printing on a ROLAND 4-color machine.
• the drying time of the printing is of the order of 50 minutes.
• a paper of 90 g / m 2 is produced .
• this paper was surfaced by sizing press with 8 g / m 2 total dry weight of a pigmented layer identical to that used in Example 1.
• the paper has a gloss level of 11, measured at 75 degrees.
• the paper has a BEKK smoothness of 134/99 seconds and an air permeability (vessel vessel Mariotte) measured according to the French standard AFNOR NF-Q-03-075 of 54.10 -3 cm 3 / (m 2 .Not).
• Example 1 As in Example 1, this paper is tested by offset printing on a ROLAND 4-color machine. The drying time of the printing is of the order of 12 minutes.
• a layer of a pigmented composition prepared in aqueous medium comprising, by dry weight parts per 100 parts in total dry weight of pigments:
• Calcium carbonate 47 shares Kaolin: 47 shares
• Amorphous synthetic silica 1 part
• Plastic pigments 5 parts (Hollow microsphere mixture of a styrene-acrylic copolymer having a size of about 0.6 ⁇ m and 0.2 ⁇ m)
• PVA 0.5 part
• Optical brightener 0.3 shares
• coated paper formed of a fibrous base (based on cellulose fibers) coated with three pigmented sub-layers and a pigmented surface layer comprising a small amount of silica.
• the coated paper obtained is calendered. It has a gloss level of 85, measured at 75 degrees.
• the paper has a BEKK smoothness of 4108/4086 seconds and an air permeability (vessel vase Mariotte) measured according to the French standard AFNOR NF-Q-03-075 of 10.10 -3 cm 3 / (m 2 .Not).
• This paper is tested by offset printing on a ROLAND 4-color machine.
• the drying time of the print is 20 minutes.
• a coated paper (fibrous base coated with three successive pigmented layers) of 170 g / m 2 sold by the ARJOWIGGINS group under the trademark CHROMOMAT® 170 g / m 2 is manufactured .
• a layer of a pigmented composition made in an aqueous medium comprising, in parts by dry weight for 100 parts in total dry weight of pigments:
• Calcium carbonate 45 shares (carbonate with 80% of pigments having a mean size ⁇ 1 ⁇ m)
• Amorphous synthetic silica (average size 5-6 ⁇ m): 5 parts
• Plastic pigments 50 shares (Hollow microsphere mixture of a styrene-acrylic copolymer having a size of about 0.6 ⁇ m and 0.2 ⁇ m)
• Binder styrene-butadiene copolymer (used in latex form): 10 parts
• PVA 0.5 part
• Optical brightener 0.4 shares
• the paper obtained is calendered. It has a gloss level of 96, measured at 75 degrees. This paper is tested by offset printing on a ROLAND 4-color machine, the drying time of the printing is 15 minutes.
• a CHROMOMAT ® coated paper of 170 g / m 2 is manufactured as in Example 4.
• coated paper of 170 g / m 2 is deposited by curtain coating, on each side, at a rate of 9 g / m 2 dry and per side, a layer of a pigmented composition without silica.
• this pigmented composition comprises, in parts by dry weight for 100 parts in total dry weight of pigments: Calcium carbonate : 50 shares (carbonate with 80% of pigments having an average size ⁇ 1 ⁇ m) Plastic pigments: 50 shares (Hollow microsphere mixture of a styrene-acrylic copolymer having a size of about 0.6 ⁇ m and 0.2 ⁇ m) Binder styrene-butadiene copolymer (used in latex form): 10 parts PVA: 0.5 part Optical brightener: 0.4 shares
• the coated paper thus obtained is calendered. It has a gloss level of 100, measured at 75 degrees.
• This coated paper is tested by offset printing on a ROLAND 4-color machine, the drying time of the printing is 45 minutes.
• an iridescent pigmented composition carried out in an aqueous medium comprising, in parts by dry weight per 100 parts by total dry weight of pigments: Iridescent pigments of the mica type coated with titanium: 35 shares Amorphous synthetic silica (average size 5-6 ⁇ m): 11 parts Plastic pigments: 54 shares (mixture of hollow microspheres of a styrene-acrylic copolymer a size of about 0.6 ⁇ m and 0.2 ⁇ m) PVA: 20 parts
• the paper obtained is calendered. It has a gloss level of 55, measured at 75 degrees.
• the paper has a BEKK smoothness of 496/467 seconds and an air permeability (vessel vase of Mariotte) measured according to the French standard AFNOR NF-Q- 03-075 of 14.10 -3 cm 3 / (m 2 .Pa.s)
• This paper is tested by offset printing on a ROLAND 4-color machine.
• the drying time of the inks is of the order of 30 minutes.
• Said iridescent pigmented composition produced in an aqueous medium comprises, in parts by dry weight per 100 parts by total dry weight of pigments: Iridescent pigments of the mica type coated with titanium: 35 shares Plastic pigments: 65 shares (Hollow microsphere mixture of a styrene-acrylic copolymer having a size of about 0.6 ⁇ m and 0.2 ⁇ m) PVA: 20 parts
• the coated paper thus obtained is calendered. It has a gloss level of 58, measured at 75 degrees.
• This paper is tested by offset printing on a ROLAND 4-color machine.
• the drying time of the inks is several hours.
• the traditional offset inks used for the tests of all the examples are semi-fresh offset inks of the OPTIMA series of the company LORILLEUX, which dry in the open air.
• the drying time of the inks it is determined from what drying time there is no longer any ink transfer on the face of another identical paper. For this, the printed and tested side of the paper is superimposed on the blank (non-printed) side of another identical paper (the virgin side is coated with the same pigmented composition), and then with the aid of an ERICHSEN® on applies a defined pressure (force of 200 Newtons) on the face opposite to the tested face using a calibrated piston (4 cm diameter). It is noted from what time of drying in the open air, the ink mark induced by the piston no longer refers to the blank face.
• silica significantly improves the drying time of the inks.
• addition of silica makes it possible to incorporate high levels of plastic pigments into the coating composition and thus to obtain high gloss papers suitable for offset printing with fast drying times for traditional inks.
• compositions pigmented with the silica used in the examples was not affected with respect to the silica-free compositions of the comparative examples when they were used in the coating process.

Landscapes

• Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Dispersion Chemistry (AREA)
• Paper (AREA)
• Photoreceptors In Electrophotography (AREA)
• Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=34948175

Family Applications (1)

Country Status (8)

Families Citing this family (9)

Family Cites Families (11)

• 2004
  • 2004-06-24 FR FR0406923A patent/FR2872180A1/fr not_active Withdrawn
• 2005
  • 2005-06-24 CN CN200580020741.5A patent/CN1973088A/zh active Pending
  • 2005-06-24 BR BRPI0512620-7A patent/BRPI0512620A/pt not_active IP Right Cessation
  • 2005-06-24 AT AT05783927T patent/ATE495022T1/de not_active IP Right Cessation
  • 2005-06-24 WO PCT/FR2005/001594 patent/WO2006010827A1/fr not_active Application Discontinuation
  • 2005-06-24 US US11/630,333 patent/US20080038553A1/en not_active Abandoned
  • 2005-06-24 EP EP05783927A patent/EP1761672B1/fr not_active Not-in-force
  • 2005-06-24 DE DE602005025874T patent/DE602005025874D1/de active Active

Also Published As

Similar Documents

Legal Events