CN114932766A - Coating, plastic coated paper base and photographic paper - Google Patents
Coating, plastic coated paper base and photographic paper Download PDFInfo
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- CN114932766A CN114932766A CN202210589479.1A CN202210589479A CN114932766A CN 114932766 A CN114932766 A CN 114932766A CN 202210589479 A CN202210589479 A CN 202210589479A CN 114932766 A CN114932766 A CN 114932766A
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- 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
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- 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
- B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
- B41M5/504—Backcoats
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- 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
- B41M5/5236—Macromolecular coatings characterised by the use of natural gums, of proteins, e.g. gelatins, or of macromolecular carbohydrates, e.g. cellulose
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- 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
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- 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
- B41M5/5263—Macromolecular coatings characterised by the use of polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- B41M5/5272—Polyesters; Polycarbonates
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- 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
- B41M5/5263—Macromolecular coatings characterised by the use of polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- B41M5/5281—Polyurethanes or polyureas
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
- G03C1/775—Photosensitive materials characterised by the base or auxiliary layers the base being of paper
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
- G03C1/85—Photosensitive materials characterised by the base or auxiliary layers characterised by antistatic additives or coatings
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- Engineering & Computer Science (AREA)
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- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a coating, plastic-coated paper base and photographic paper, wherein the coating comprises 50-90 parts by weight of water, 5-20 parts by weight of an anti-blocking agent, 5-20 parts by weight of an antistatic agent, 5-30 parts by weight of a water-dispersible resin and 0.1-5 parts by weight of a surfactant. The coating not only has an anti-static function, but also has high bonding fastness with color band ink, high coding fastness and excellent coding function, can meet the technological requirements of quick automatic washing, effectively solves the problem of drying, shedding and powder falling of an anti-adhesion agent, avoids the generation of photographic paper damage and improves the product quality of the photographic paper.
Description
Technical Field
The invention belongs to the technical field of photographic printing, and particularly relates to a coating, a plastic-coated paper base and photographic paper.
Background
Photographic paper support-plastic coated paper base (RC paper base) is a paper base formed by laminating polyolefin on two sides of photographic base paper, the front side of the RC paper base is generally coated with a gelatin bottom layer to enhance the adhesion between the paper base and a photosensitive emulsion layer, and meanwhile, in order to eliminate static electricity generated in the coating process of the paper base and prevent a paper base scroll from being adhered, the back side of the RC paper base is generally coated with an anti-static coating or an anti-sticking layer as an auxiliary coating. Generally, when the photos are punched and expanded, the worker can record the information established by adjusting the punching and expanding channels and various required information on the auxiliary coating layer of the paper backing layer in a color tape coding mode, so that the photos can be conveniently and quickly inquired. The auxiliary coating on the back of the paper base is mostly made of colloidal silica, the main body generally presents poor coding fastness, printed information is not clear or disappears after being washed by developing processing liquid medicine, great inconvenience is brought to workers, and the technical requirement of quick automatic washing cannot be met; and the auxiliary coating mainly made of colloidal silicon oxide continuously rubs with a coating guide roller in the emulsion coating process, silicon dioxide particles fall off from the surface of the auxiliary coating to form white powder, the white powder is attached to the surface of the guide roller and aggregated into hard clusters in a wet coating environment to form punch marks, and the product quality is seriously influenced.
Patent CN109385929 discloses an antistatic coating liquid coated on the surface of an RC paper base, which adopts polystyrene sulfonate as an antistatic agent to solve the problem of static electricity of the RC paper base, but still has the problems of poor code fastness and silica sol drying and falling off and powder falling; CN102221774 discloses a plastic-coated paper base with antistatic bottom layers on two sides, and the surface resistance of the obtained plastic-coated paper base is ensured to be in a required range by controlling the dosage proportion of an antistatic agent and an anti-blocking agent in the antistatic bottom layers.
Thus, the existing plastic-coated paper base is in need of improvement.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide a coating, a plastic-coated paper base and photographic paper, wherein the coating not only has an antistatic function, but also has high bonding fastness between the coating and color band ink, high code printing fastness and excellent code printing function, can meet the process requirement of quick automatic flushing, effectively solves the problem of drying and shedding of an anti-adhesion agent, avoids generation of photographic paper damage and print loss, and improves the product quality of the photographic paper.
In one aspect of the present invention, the present invention provides a coating layer, which includes, according to an embodiment of the present invention, 50 to 90 parts by weight of water, 5 to 20 parts by weight of an anti-blocking agent, 5 to 20 parts by weight of an antistatic agent, 5 to 30 parts by weight of a water-dispersible resin, and 0.1 to 5 parts by weight of a surfactant.
Therefore, the coating is prepared by mixing water, an anti-blocking agent, an anti-static agent, a water-dispersible resin and a surfactant, wherein the anti-static agent can enable the coating to have an anti-static function, the water-dispersible resin can reduce the hydrophilicity of the coating and improve the bonding fastness between the coating and ribbon ink, meanwhile, the water-dispersible resin can inhibit the anti-blocking agent from forming a large amount of Si-O-Si after being dried, so that the coding fastness of the coating is improved, the water-dispersible resin is added into the coating, inorganic particles in the coating can be effectively bonded after the water-dispersible resin is dried into a film, the inorganic particles are prevented from being agglomerated after falling off, the problem that the anti-blocking agent is dried and falls off and powder is removed in the emulsion coating process is solved, and the inventor also finds that if the using amount of the water-dispersible resin in the coating is less than 5 parts by weight, the acting force between the ribbon ink and the water-dispersible resin molecules is small, the printing ink is easy to fall off from the surface of the back layer, the code fastness is poor, a small amount of resin molecules cannot effectively bond particles, the printing paper is easy to generate punch marks, and if the using amount of the water dispersible resin is more than 30 parts by weight, the conductive effect of the plastic-coated paper back layer is easy to reduce, so that the static spots are generated on the printing paper; if the dosage of the anti-sticking agent is less than 5 parts by weight, the surface of the back layer is too smooth and is easy to be adhered with the emulsion layer on the front side, thus influencing the use, if the dosage of the anti-sticking agent is more than 20 parts by weight, the anti-sticking agent is easy to fall off from the back layer of the plastic-coated paper base, and the photographic paper is easy to damage, so that the coating is used as an auxiliary coating on the back surface of the plastic-coated paper base, the friction effect in the developing process and the competitive replacement of water molecules on ink molecules can be effectively resisted, the ink molecules are prevented from falling off from the surface of the back layer of the plastic-coated paper base, and good coding fastness is obtained.
In addition, the coating according to the above embodiment of the present invention may also have the following additional technical features:
in some embodiments of the invention, the surface energy of the water-dispersible resin is not less than 38J.m -2 . Therefore, the color band ink can be well spread on the surface of the coating, the contact area of the resin and the ink molecules is increased, and the coding fastness of the coating is further improved.
In some embodiments of the present invention, the molecular structure of the water dispersible resin contains a carbon chain structure with no less than 16 carbon atoms. Therefore, the affinity between the color band ink and the resin in the paper base back coating can be improved, and the coding fastness of the coating is further improved.
In some embodiments of the invention, the water dispersible resin comprises at least one of polyester, polyurethane, cellulose, polyolefin acrylic copolymer, and gelatin. Therefore, the code fastness of the coating can be improved.
In some embodiments of the invention, the antiblocking agent comprises at least one of a silica sol dispersion and a titanium dioxide dispersion.
In some embodiments of the present invention, the concentration of the silica sol dispersion and the concentration of the titanium dioxide dispersion are each independently 25 to 30 wt%. Therefore, the anti-adhesion coating can play a good anti-adhesion role, can ensure that the coating and the back surface of the plastic-coated paper base are stably adhered, is not easy to fall off, and avoids the generation of punch marks of photographic paper.
In some embodiments of the invention, the average particle size of the microparticles in the silica sol dispersion and the titania dispersion are each independently from 10 to 100 nm. Therefore, the anti-adhesion paper base can play a good anti-adhesion role, can ensure that the coating and the back of the plastic-coated paper base are stably adhered, is not easy to fall off, and avoids the generation of photographic paper punch marks.
In some embodiments of the invention, the antistatic agent comprises at least one of polythiophene, alkylbenzene sulfonate, alkyl sulfonate, and betaine. Thereby, the coating has an antistatic function.
In some embodiments of the present invention, the surfactant is at least one of an anionic surfactant, a cationic surfactant, a nonionic surfactant, and an amphoteric surfactant.
In yet another aspect, the present invention provides a plastic-coated paper substrate, according to an embodiment of the present invention, comprising:
photographic base paper;
a first polyolefin layer formed on an upper surface of the photographic base paper;
a gelatin layer disposed on a surface of the first polyolefin layer on a side thereof remote from the photographic base paper;
a second polyolefin layer formed on a lower surface of the photographic base paper;
and the auxiliary coating is arranged on the surface of one side, far away from the photographic base paper, of the second polyolefin layer, wherein the auxiliary coating is the coating.
Therefore, the coating with the anti-static function and the higher binding force with the ink molecules is used as the auxiliary coating on the back of the plastic-coated paper base, so that the friction effect in the developing and processing washing process and the competitive replacement of the water molecules to the ink molecules can be effectively resisted, the ink molecules are prevented from falling off from the surface of the back layer of the plastic-coated paper base, and the good code printing fastness is obtained.
In another aspect of the present invention, the present invention provides a photographic paper. According to an embodiment of the present invention, the photographic paper comprises the plastic-coated paper base described above. Therefore, the information printed on the photographic paper is clear, the stability is high, the disappearance is not easy, and the photographic paper has higher quality.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic representation of a plastic-coated paper substrate structure according to one embodiment of the present invention.
Detailed Description
The following describes embodiments of the present invention in detail. The following examples are illustrative only and are not to be construed as limiting the invention.
The present application was completed based on the following findings: the hydrophilicity of the coating and the binding fastness between the coating and the ink of the color band are main factors influencing the code printing fastness of the back coating of the plastic-coated paper base, the code printing process of the plastic-coated paper base comprises the contact of the ink of the color band and the surface of the back coating of the plastic-coated paper base and the adsorption of the ink on the surface of the back coating of the plastic-coated paper base, water molecules in a developing solution can spread and adsorb on the surface of the back coating of the paper base, the water molecules in the ink of the color band and the developing solution have a competitive relationship on the adsorption of the water molecules on the back coating of the plastic-coated paper base, if the adsorption of the back coating of the plastic-coated paper base on the water molecules is greater than the adsorption of the ink of the color band, the water molecules can replace the ink molecules in the developing process, the ink marks can disappear from the back coating, namely, the poor code printing fastness is presented, otherwise, the ink molecules can be on the surface of the back coating of the plastic-coated paper base, and the good code printing fastness is presented, meanwhile, a large amount of Si-O-Si is formed after silica sol in the conventional back coating is dried, oxygen atoms in the silica sol have larger electronegativity, and form hydrogen bonds with stronger affinity with water molecules in a developing solution, so that ink molecules with weak affinity are replaced, and thus, a code printing imprint attached to the anti-static layer disappears, and the code printing fastness is influenced. The inventor of the application actively explores the back coating of the plastic-coated paper base, aims to overcome the defects in the prior art and obtains the plastic-coated paper base with firm code printing.
To this end, in one aspect of the present invention, the present invention provides a coating layer, which includes, according to an embodiment of the present invention, 50 to 90 parts by weight of water, 5 to 20 parts by weight of an anti-blocking agent, 5 to 20 parts by weight of an antistatic agent, 5 to 30 parts by weight of a water-dispersible resin, and 0.1 to 5 parts by weight of a surfactant.
The inventors found that a coating layer is prepared by mixing water, an anti-blocking agent, an anti-static agent, a water-dispersible resin and a surfactant, wherein the anti-static agent can make the coating layer have an anti-static function, the water-dispersible resin can reduce the hydrophilicity of the coating layer and improve the bonding fastness between the coating layer and ink of a ribbon, and the water-dispersible resin can inhibit the anti-blocking agent from forming a large amount of Si-O-Si after being dried, thereby improving the code printing fastness of the coating layer, and the water-dispersible resin is added into the coating layer, after the water-dispersible resin is dried to form a film, inorganic particles in the coating layer can be effectively bonded, and the inorganic particles are prevented from being agglomerated after falling off, thereby solving the problem that the anti-blocking agent is dried to fall off and fall off powder during emulsion coating, and the inventors also found that if the amount of the water-dispersible resin in the coating layer is less than 5 parts by weight, the acting force between the ink of the ribbon and the water-dispersible resin is small, the printing ink is easy to fall off from the surface of the back layer, the code fastness is poor, a small amount of resin molecules cannot effectively bond particles, the printing paper is easy to generate punch marks, and if the using amount of the water dispersible resin is more than 30 parts by weight, the conductive effect of the plastic-coated paper back layer is easy to reduce, so that the static spots are generated on the printing paper; if the dosage of the anti-sticking agent is less than 5 parts by weight, the surface of the back layer is too smooth and is easy to be adhered with the emulsion layer on the front side, thus influencing the use, if the dosage of the anti-sticking agent is more than 20 parts by weight, the anti-sticking agent is easy to fall off from the back layer of the plastic-coated paper base, and the photographic paper is easy to damage, so that the coating is used as an auxiliary coating on the back surface of the plastic-coated paper base, the friction effect in the developing process and the competitive replacement of water molecules on ink molecules can be effectively resisted, the ink molecules are prevented from falling off from the surface of the back layer of the plastic-coated paper base, and good coding fastness is obtained.
Further, the surface energy of the above water-dispersible resin is not less than 38J.m -2 . The inventors have found that if the resin system in the above coating is intended to achieve excellent binding with the ink of the ink ribbon, the ink of the ink ribbon is capable of forming good spread on the surface of the coating, and the spread of the ink ribbon occursThe surface of the coating is determined primarily by the surface energy levels of the ribbon ink and the paper backing coating. The greater the surface energy of the coating surface, the easier the ribbon ink will spread over it, and in order for the ribbon ink to spread smoothly over the coating surface, it is generally desirable that the surface energy of the coating be 10J.m greater than the surface energy of the ribbon ink -2 About, the main solvent used by the ribbon ink is castor oil with low price and low freezing point, and the surface energy of the castor oil is 28-30 J.m -2 Therefore, the surface energy of the coating is required to be not less than 38mJ.m -2 Thus, the surface level energy difference can drive good spreading of the ribbon ink on the coating. If the surface energy of the water-dispersible resin is less than 38J.m -2 The surface energy of the formed coating is too low, and the spreading power of the ink on the coating is insufficient, so that the code fastness is influenced. Thus, the surface energy of the water-dispersible resin selected for use herein is not less than 38mJ.m -2 The ink ribbon ink can form good spreading on the surface of the coating, the contact area of the resin and the ink molecules is increased, and the coding fastness of the coating is further improved. Preferably, the surface energy of the water-dispersible resin is not less than 42J.m -2 . Meanwhile, the molecular structure of the water dispersible resin contains a carbon chain structure with the carbon number not less than 16. The inventor finds that the affinity of the water-dispersible resin in the ink ribbon and the coating is another important factor influencing the code fastness, the solvent-castor oil in the ink ribbon contains longer unsaturated carbon chains and smaller molecular polarity, according to the principle of similar intermiscibility, the selected water-dispersible resin needs to contain longer carbon chains, the molecular polarity of the long carbon chains is weaker, the longer the molecular carbon chains, the stronger the hydrophobicity, i.e. the better the lipophilicity, the higher the binding fastness with the ink ribbon, if the carbon atom number of the long carbon chains in the molecules is less than 16, the lower the affinity existing between the water-dispersible resin and the ink molecules, the poor binding fastness, the ink molecules are easy to fall off from the surface of the back coating, and the poor code fastness is obtained. Therefore, the carbon chain structure with the carbon atom number not less than 16 in the molecular structure of the water-dispersible resin is selected, so that the affinity between the color band ink and the resin in the paper-based back coating can be improved, and the coding fastness of the paper-based back coating is further improved. And the water dispersibility can be adjusted by the person skilled in the art according to the specific actual needsThe specific type of resin is selected so long as the above specific requirements are satisfied, and for example, the water-dispersible resin includes at least one of polyester, polyurethane, cellulose, polyolefin acrylic copolymer, and gelatin. Thereby, the coding fastness of the paper-based back layer coating is improved.
Further, the anti-blocking agent includes at least one of a silica sol dispersion and a titanium dioxide dispersion. Meanwhile, the concentrations of the silica sol dispersion and the titanium dioxide dispersion are respectively and independently 25-30 wt%. And the average particle diameters of the fine particles in the silica sol dispersion and the titanium dioxide dispersion are respectively and independently 10 to 100 nm. The inventor finds that the silica sol or titanium dioxide can prevent adhesion in the coating during the production or storage of a photographic paper scroll, the use is influenced, if the particle size of the anti-blocking agent is less than 10nm, the surface of the paper-based back layer is too smooth and is easy to adhere with an emulsion layer on the front surface of the plastic-coated paper base, and the use is influenced, and if the particle size of the anti-blocking agent is more than 100nm, the coating is easy to fall off from the paper-based back layer, and photographic paper punch marks are generated. Therefore, the average particle size of the particles in the silica sol dispersion liquid and the titanium dioxide dispersion liquid is respectively and independently 10-100 nanometers, so that a good anti-adhesion effect can be achieved, the coating and the back of the paper base can be firmly adhered, the paper base is not easy to fall off, and the generation of photographic paper punch marks is avoided.
It should be noted that the skilled person can select the specific type of antistatic agent according to actual needs as long as the antistatic function of the plastic-coated paper back coating can be achieved, for example, the antistatic agent includes at least one of polythiophene, alkylbenzene sulfonate, alkyl sulfonate and betaine.
It should be noted that the specific type of surfactant can be selected by those skilled in the art according to actual needs as long as the coating appearance can be adjusted, and for example, the surfactant is at least one of an anionic surfactant, a cationic surfactant, a nonionic surfactant, and an amphoteric surfactant.
In a further aspect thereof, the present invention provides a plastic-coated paper substrate, according to an embodiment of the present invention, with reference to fig. 1, comprising: a photographic base paper 100, a first polyolefin layer 200, a gelatin layer 300, a second polyolefin layer 400, and an auxiliary coating layer 500.
According to an embodiment of the present invention, the first polyolefin layer 200 is formed on the upper surface of the photographic base paper 100; the gelatin layer 300 is provided on the surface of the first polyolefin layer 200 on the side remote from the photographic base paper 100; the second polyolefin layer 400 is formed on the lower surface of the photographic base paper 100; the auxiliary coating 500 is provided on the surface of the second polyolefin layer 200 on the side remote from the photographic base paper 100, wherein the auxiliary coating 500 is the above-described coating.
Therefore, the coating with the anti-static function and the higher binding force with the ink molecules is used as the auxiliary coating on the back of the plastic-coated paper base, so that the friction effect in the developing and processing washing process and the competitive replacement of the water molecules to the ink molecules can be effectively resisted, the ink molecules are prevented from falling off from the surface of the back layer of the plastic-coated paper base, and the good code printing fastness is obtained.
It should be noted that the photographic base paper, the first polyolefin layer, the gelatin layer and the second polyolefin layer are all conventional structural compositions of the plastic-coated paper base, and the features and advantages described above for the coating layer are also applicable to the plastic-coated paper base, and are not described in detail herein.
In another aspect of the present invention, the present invention provides a photographic paper. According to an embodiment of the present invention, the photographic paper comprises the plastic-coated paper base described above. Therefore, the information printed on the photographic paper is clear, the stability is high, the disappearance is not easy, and the photographic paper has higher quality. Meanwhile, the advantages and properties of the coating and the plastic-coated paper base are also suitable for the photographic paper, and the detailed description is omitted.
The invention will now be described with reference to specific examples, which are intended to be illustrative only and not to be limiting in any way.
Preparation of plastic-coated paper base
Comparative example 1
Adding deionized water, silica sol, an antistatic agent and a surfactant into a container, and uniformly stirring to prepare the back layer coating liquid. The coating liquid is coated on the back of the corona-coated plastic paper base by using a coating rod and dried for 1 minute under the drying condition of 100 ℃. The parameters for the use of the above materials are specified in table 1.
General procedure
Deionized water, an anti-blocking agent, an anti-static agent, a water-dispersible resin and a surfactant are added into a container and stirred uniformly to prepare a back layer coating liquid. The coating liquid is coated on the back of the corona-coated plastic paper base by using a coating rod and dried for 1 minute under the drying condition of 100 ℃.
Examples 1 to 5 the preparation of the plastic coated paper substrate was carried out using the general method described above, and the specific parameters of the materials used in examples 1 to 5 are shown in table 1.
TABLE 1
The plastic-coated paper base obtained in the comparative example 1 and the examples 1 to 5 is subjected to a performance test, and the specific test process and method are as follows:
(1) surface resistance detection
The surface resistances of the plastic-coated paper substrate back surface coatings obtained in the above-mentioned ratio 1 and examples 1 to 5 at 23 ℃ and 50% RH were measured by a surface resistance meter, respectively.
(2) Photographic performance testing
Coating a gelatin bottom layer on the front surface of the corona plastic-coated paper base, drying at 100 deg.C for 5 min, coating an emulsion coating on the gelatin bottom layer in dark room, and drying at 80 deg.C for 10 min to obtain emulsion sample sheet;
6 kinds of samples obtained in examples 1 to 5 and comparative example were cut into strips having a length of 20cm and a width of 10cm to prepare back layer samples;
taking a backing layer sample respectively, overlapping the surface coated with the backing layer coating with the emulsion surface of the emulsion sample, placing into an aging bag, aging in a constant temperature and humidity chamber with 50 ℃ and 65% RH for 7 days, and detecting the change of photographic performance.
(3) Detection of coding fastness
And (3) respectively taking the backing layer sample sheets prepared in the step (2) and spreading the backing layer sample sheets on a flat desktop, placing a needle printer ink ribbon on the backing layer of the sample sheets, and drawing letters or numbers on the ink ribbon by using the tips of the pins, wherein the force for controlling the whole drawing process is uniform, and at the moment, the backing layer of each sample sheet is provided with marks penetrating through the ink ribbon.
The 6 samples with the marks are placed into a developing solution with the constant temperature of 40 ℃ for soaking for 10 minutes, taken out, washed by water with the temperature of 40 ℃ and wiped by hands with equal force, and the retention of the marks is observed.
(4) Adhesion fastness test of back coating
Taking 1 piece of each backing layer sample prepared in the step (2), bonding the backing layer sample with a 3M adhesive tape, tearing the adhesive tape at the same speed at an angle of 90 degrees, and observing whether foreign matters are attached on the adhesive tape.
The results of the above tests are shown in Table 2.
TABLE 2
| Surface resistance omega | Photographic performance | Retention of print | Whether the adhesive tape has foreign matter or not | |
| Example 1 | 2.6*10 8 | Is normal | The mark is clearly visible | No foreign matter |
| Example 2 | 1.2*10 8 | Is normal | The mark is clearly visible | No foreign matter |
| Example 3 | 2.2*10 8 | Is normal and normal | The mark is clearly visible | No foreign matter |
| Example 4 | 4.3*10 8 | Is normal | The mark is clearly visible | Without foreign matter |
| Example 5 | 1.8*10 8 | Is normal | The mark is clearly visible | No foreign matter |
| Comparative example 1 | 3.5*10 8 | Is normal | Disappearance of imprint | With particles attached |
The test results show that:
(1) the back layer coating is added with resin, and the conductivity and the photographic performance of the paper base are not affected.
(2) After the resin is added into the back layer coating, the back layer information can still be clearly seen after development processing and washing, and the code printing fastness is good.
(3) After the resin is added into the back coating, the shedding performance of the inorganic particles in the coating is obviously improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A coating layer is characterized by comprising 50-90 parts by weight of water, 5-20 parts by weight of an anti-blocking agent, 5-20 parts by weight of an antistatic agent, 5-30 parts by weight of a water-dispersible resin and 0.1-5 parts by weight of a surfactant.
2. The coating of claim 1, wherein the water dispersible resin has a surface energy of not less than 38J.m -2 。
3. The coating of claim 1 or 2, wherein the molecular structure of the water-dispersible resin contains a carbon chain structure with no less than 16 carbon atoms.
4. The coating of claim 1, wherein the water dispersible resin comprises at least one of polyester, polyurethane, cellulose, polyolefin acrylic copolymer, and gelatin.
5. The coating of claim 1, wherein the anti-blocking agent comprises at least one of a silica sol dispersion and a titanium dioxide dispersion.
6. The coating according to claim 5, wherein the concentration of the silica sol dispersion and the concentration of the titanium dioxide dispersion are each independently 25 to 30 wt%.
Optionally, the average particle size of the microparticles in the silica sol dispersion and the titanium dioxide dispersion is independently 10 to 100nm, respectively.
7. The coating of claim 1, wherein the antistatic agent comprises at least one of polythiophene, alkylbenzene sulfonate, alkyl sulfonate, and betaine.
8. The coating of claim 1, wherein the surfactant is at least one of an anionic surfactant, a cationic surfactant, a nonionic surfactant, and an amphoteric surfactant.
9. A plastic coated paper substrate, comprising:
photographic base paper;
a first polyolefin layer formed on an upper surface of the photographic base paper;
a gelatin layer disposed on a surface of the first polyolefin layer on a side thereof remote from the photographic base paper;
a second polyolefin layer formed on a lower surface of the photographic base paper;
an auxiliary coating layer provided on a surface of the second polyolefin layer on a side remote from the photographic base paper, wherein the auxiliary coating layer is the coating layer of any one of claims 1 to 8.
10. A photographic paper characterized in that it comprises the plastic-coated paper base of claim 9.
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| CN202210589479.1A CN114932766A (en) | 2022-05-26 | 2022-05-26 | Coating, plastic coated paper base and photographic paper |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210589479.1A CN114932766A (en) | 2022-05-26 | 2022-05-26 | Coating, plastic coated paper base and photographic paper |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4582785A (en) * | 1982-01-29 | 1986-04-15 | The Wiggins Teape Group Limited | Photographic polyolefin coated base papers and method of making |
| CN1273373A (en) * | 1999-05-06 | 2000-11-15 | 伊斯曼柯达公司 | Photographic paper base containing polymer primary amine adding salt |
| CN101980872A (en) * | 2008-03-27 | 2011-02-23 | 日本制纸株式会社 | Ink jet recording medium and process for producing the ink jet recording medium |
| CN105216472A (en) * | 2015-10-30 | 2016-01-06 | 合肥乐凯科技产业有限公司 | A kind of dry type medical film polyester film base |
| CN111073379A (en) * | 2019-12-06 | 2020-04-28 | 乐凯胶片股份有限公司 | Electrostatic printing material |
| CN113696653A (en) * | 2021-09-22 | 2021-11-26 | 乐凯胶片股份有限公司 | PP printing material, preparation method thereof and printer |
-
2022
- 2022-05-26 CN CN202210589479.1A patent/CN114932766A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4582785A (en) * | 1982-01-29 | 1986-04-15 | The Wiggins Teape Group Limited | Photographic polyolefin coated base papers and method of making |
| CN1273373A (en) * | 1999-05-06 | 2000-11-15 | 伊斯曼柯达公司 | Photographic paper base containing polymer primary amine adding salt |
| CN101980872A (en) * | 2008-03-27 | 2011-02-23 | 日本制纸株式会社 | Ink jet recording medium and process for producing the ink jet recording medium |
| CN105216472A (en) * | 2015-10-30 | 2016-01-06 | 合肥乐凯科技产业有限公司 | A kind of dry type medical film polyester film base |
| CN111073379A (en) * | 2019-12-06 | 2020-04-28 | 乐凯胶片股份有限公司 | Electrostatic printing material |
| CN113696653A (en) * | 2021-09-22 | 2021-11-26 | 乐凯胶片股份有限公司 | PP printing material, preparation method thereof and printer |
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