CN108264797B - Gravure pearlescent varnish for tipping paper and preparation method thereof - Google Patents

Gravure pearlescent varnish for tipping paper and preparation method thereof Download PDF

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CN108264797B
CN108264797B CN201810126109.8A CN201810126109A CN108264797B CN 108264797 B CN108264797 B CN 108264797B CN 201810126109 A CN201810126109 A CN 201810126109A CN 108264797 B CN108264797 B CN 108264797B
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parts
gravure
pearlescent
tipping paper
varnish
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CN108264797A (en
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何宗修
龚麟
杨正德
王长寿
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Yuxi Tipping Paper Manufacturing Co ltd
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Yuxi Tipping Paper Manufacturing Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
    • C09D11/033—Printing inks characterised by features other than the chemical nature of the binder characterised by the solvent
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
    • C09D11/103—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds of aldehydes, e.g. phenol-formaldehyde resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/14—Printing inks based on carbohydrates

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

The invention discloses gravure pearlescent varnish for tipping paper and a preparation method thereof, wherein the gravure pearlescent varnish is prepared from the following raw materials in parts by weight: 5-25 parts of polyvinyl butyral resin, 5-20 parts of cellulose acetate butyrate, 1-10 parts of aldehyde ketone resin, 1-10 parts of rosin glyceride, 1-10 parts of anti-settling agent and 50-80 parts of solvent. The gravure pearlescent ink oil is prepared by reasonably matching various nontoxic and transparent resins in the formula components and adopting a blending process. The varnish has the characteristics of good luster, excellent wetting dispersion and directional arrangement performance of pearlescent pigment, strong adhesive force, good printing adaptability, quick drying, precipitation prevention, wide application range and the like.

Description

Gravure pearlescent varnish for tipping paper and preparation method thereof
Technical Field
The invention relates to ink and varnish, in particular to gravure pearlescent varnish for tipping paper and a preparation method thereof.
Background
In recent years, with the continuous and stable increase of national economy of China, a wider market space is provided for the industry of printing and packaging products. Among them, the pearl printing is used as a special effect printing product printed by special ink, and the market prospect is widely seen by the industry people. The pearly-lustre printing can reconstruct a brand-new color space and light color effect on the surface of flat and plain paper and other base materials by organically combining the personalized design of people and the texture of printed matters. The printing technology of offset printing, intaglio printing, flexographic printing, relief printing, silk screen printing and the like is adopted, and the printing technology is widely applied to the aspects of external packaging of high-grade cosmetics, packaging boxes of various cigarettes, packaging boxes of high-grade trademarks and propaganda materials, magazines, advertisements, wallpaper, labels, plastic films and the like.
The gravure pearlescent ink mainly comprises pearlescent pigment, varnish (also called as binder), solvent and other auxiliary agents. The pearlescent pigment is formed by coating mica with titanium dioxide (or other metal oxides), is in a flake structure, and can flash different lightness, saturation, hue and even color according to different observation angles. The pearlescent pigment has no affinity to the fiber, and forms a transparent resin film on the surface of a printing stock by the varnish, wraps pigment ions and adheres to the printing stock. Therefore, the role of the varnish in gravure pearlescent ink is very important, and the hand feeling and various fastness of prints, the rheological property and the drying property of the ink and other indexes are greatly dependent on the variety and the quality of the varnish.
However, the gravure pearlescent varnish used in the prior art has the following defects. Firstly, the pigment has poor wetting and dispersing performance, and is easy to precipitate, delaminate and agglomerate after the pearlescent pigment is added, so that not only can the printed product have serious color difference in the production process to cause the printed product to be scrapped, but also the residual material of the pearlescent ink is inconvenient to store, and the production cost is increased; secondly, the adhesive force is weak, so that the method is not suitable for adding pearlescent pigment in a large proportion, otherwise, the powder falling phenomenon occurs; thirdly, the directional arrangement of the pearlescent pigment in the coating is poor, and the pearlescent effect of the printed product is seriously influenced.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide the gravure pearlescent varnish for tipping paper and the preparation method thereof. The varnish has the characteristics of good luster, excellent wetting dispersion and directional arrangement performance of pearlescent pigment, strong adhesive force, good printing adaptability, quick drying, precipitation prevention, wide application range and the like.
In order to achieve the purpose, the invention adopts the following technical means: the gravure pearlescent varnish ink for tipping paper comprises the following raw materials in parts by weight: 5-25 parts of polyvinyl butyral resin, 5-20 parts of cellulose acetate butyrate, 1-10 parts of aldehyde ketone resin, 1-10 parts of rosin glyceride, 1-10 parts of anti-settling agent and 50-80 parts of solvent.
Preferably, the gravure pearlescent varnish for tipping paper comprises the following raw materials in parts by weight: 10-15 parts of polyvinyl butyral resin, 6-10 parts of cellulose acetate butyrate, 3-5 parts of aldehyde ketone resin, 3-5 parts of rosin glyceride, 1-3 parts of anti-settling agent and 65-75 parts of solvent.
The anti-settling agent is polyethylene wax.
The solvent consists of ethanol, ethyl acetate and n-propyl acetate, and the solvent comprises the following components in parts by weight: 30-35 parts of ethanol, 30-35 parts of ethyl acetate and 2-4 parts of n-propyl acetate.
Among them, polyvinyl butyral (PVB) is a commonly used support, which has strong binding force, high optical clarity, easy adhesion to various surfaces, high toughness and high elasticity. The structure is white powder, the relative density is 1.08-1.10, and the organic solvent can be dissolved in methanol, ethanol, ketones, alkyl halides and aromatic solvents. Because of containing high hydroxyl, the polyvinyl butyral resin has good dispersibility on pigment, so the polyvinyl butyral resin is widely applied to printing ink and paint, alcohol-soluble ink is produced by PVB, is non-toxic, harmless and environment-friendly, and meets the requirements of national food packaging safety standard.
The aldehyde ketone resin (also known as polyketone resin, ketone aldehyde resin) is a neutral, nonsaponifiable cyclohexanone-formaldehyde resin having high brightness and light resistance, and is pale white granular or lumpy solid, soluble in most common solvents, and compatible with most other resins. The high-gloss and high-gloss aqueous ink is mainly used in solvent-based ink, paint, universal color paste, adhesive and other systems, and is used for improving the glossiness, the adhesive force, the quick drying property, the leveling property, the pigment wettability, the solid content and the like of products.
The rosin glyceride is colorless water white rosin resin, is a natural tackifying resin with partial disproportionation and hydrogenation, and has the advantages of almost water white color, high softening point, low and soft smell, outstanding thermal stability, aging resistance, difficult yellowing, strong adhesive force and the like. The solvent has good solubility, can be dissolved in various solvents such as cyclohexane, petroleum ether, toluene, xylene, ethyl acetate, acetone and the like, and can be mixed with various polymers in any proportion. Is especially suitable for preparing hot melt adhesive for high-grade sanitary products and adhesive with strict appearance requirement.
Cellulose Acetate Butyrate (CAB) is used as an auxiliary agent, modified resin or a main film forming substance in printing ink and coating, and can improve leveling property, reduce craters, shorten drying time, reduce pressure adhesion, stabilize a carrier by a metal pigment, improve grinding property, ultraviolet light stability and yellowing resistance, improve spraying property, enhance frost crack resistance, reduce solvent cracks, improve sliding property, reduce plasticizer migration property, control viscosity, grind a pigment medium, control aluminum powder directional arrangement and have the function of re-dissolving resistance of a solvent.
The polyethylene wax is superfine polyethylene wax micropowder, and the product is white powder, and has the special properties of low viscosity, high softening point, white color, high glossiness, good lubricity, higher hardness, good wear resistance, adhesion resistance, stain resistance, precipitation resistance, scratch resistance, smooth hand feeling, excellent dispersibility and the like. It has good light resistance and chemical property, can be used as a carrier of pigment, can improve the wear resistance of paint and ink, improves the dispersibility of pigment and filler, and prevents pigment from sinking. The ink is applied to the fields of woodenware paint, industrial paint, powder coating, inner printing, surface printing, silk screen, relief printing, intaglio printing and the like.
Ethanol is an organic substance, commonly called alcohol, is saturated monohydric alcohol with a hydroxyl group, is flammable and volatile colorless transparent liquid at normal temperature and normal pressure, and has the smell of bouquet and slight irritation in an aqueous solution. Has the smell of wine and pungent taste, and is slightly sweet. The ethanol has wide application range, and can be used for preparing acetic acid, beverages, essence, paint, ink and the like.
Ethyl acetate is a colorless clear liquid, a fast drying solvent for cellulose nitrate, ethyl cellulose, cellulose acetate and neoprene, and also a low toxicity solvent used industrially.
The n-propyl acetate is also called as 'n-propyl acetate' or 'propyl acetate', is colorless transparent liquid at normal temperature, is mutually soluble with ethanol and ether, and has special fruit fragrance.
The preparation method of the gravure pearlescent ink-regulating oil for tipping paper comprises the following steps:
a. adding the ethanol, the ethyl acetate and the n-propyl acetate which are weighed according to the proportion into a container, and stirring at the normal temperature for 3-5 min at the stirring speed of 500-700r/min to obtain a mixed solution A;
b. sequentially adding polyvinyl butyral resin, aldehyde ketone resin, rosin glycerol ester and cellulose acetate butyrate which are weighed according to the proportion into the mixed solution A, and stirring for 2-4 h at normal temperature with the stirring speed of 800-;
c. adding the polyethylene wax weighed according to the proportion into the mixed solution B, stirring for 1-2 h at the stirring speed of 800-1000r/min until the mixture is completely and uniformly dispersed, wherein the mixing ratio is 1: 1, complementing the mixed solvent of ethanol and ethyl acetate to 100 parts, and filtering by a screen with 180-200 meshes to obtain the gravure pearlescent ink-regulating oil for tipping paper.
Preparing gravure pearlescent ink:
a. the gravure pearlescent ink for tipping paper comprises the following raw materials in parts by weight: 60 parts of gravure pearlescent varnish, 10-20 parts of pearlescent pigment, 10-15 parts of ethanol and 10-15 parts of ethyl acetate.
b. Pre-dispersion of pearlescent pigment: fully wetting the pearlescent pigment by using a mixed solvent of 2.5-5 parts of ethanol and 2.5-5 parts of ethyl acetate, then adding 5-10 parts of gravure pearlescent ink-regulating oil, stirring at normal temperature for 10-15 min at the stirring speed of 500r/min, and uniformly stirring.
c. And adding the pre-dispersed pearlescent pigment into the rest of gravure ink-adjusting oil, finally adding the rest of ethanol and ethyl acetate solvent, stirring at normal temperature for 10-15 min at the stirring speed of 300-500r/min until uniformly stirring to obtain the gravure pearlescent ink.
The prepared gravure pearlescent ink is dried at the temperature of 22-28 ℃ and the relative humidity of 50-60 percent by adopting a printing plate with 60-80 lines/cm, the drying temperature of 130-2Printing process with wet coating amount of 32-45g/m2Printing the surface of the tipping paper, drying and rolling to obtain the pearlescent tipping paper product.
The invention has the following beneficial effects:
the gravure pearly-lustre ink for tipping paper is prepared by reasonably matching various nontoxic and transparent resins in formula components and adopting a blending process. The varnish has the characteristics of good luster, excellent wetting dispersion and directional arrangement performance of pearlescent pigment, strong adhesive force, good printing adaptability, quick drying, precipitation prevention, wide application range and the like.
Secondly, the gravure pearlescent varnish has good release property of the selected transparent resin solvent, the tipping paper containing the varnish has the advantage of low odor, and simultaneously has the precipitation prevention function, the prepared pearlescent varnish is not easy to delaminate and precipitate, and the quality is stable after long-term storage.
The gravure pearlescent ink oil prepared by the invention has the advantages of simple production process, no need of adding any machine equipment, no increase of production cost, simple polymer blending modification, and convenience for control and large-scale production.
Detailed Description
Example 1
The specific formula of the embodiment comprises the following components in parts by weight: 15 parts of polyvinyl butyral resin, 6 parts of cellulose acetate butyrate, 3 parts of aldehyde ketone resin, 3 parts of rosin glyceride, 1 part of polyethylene wax, 35 parts of ethanol, 35 parts of ethyl acetate and 2 parts of n-propyl acetate.
The production is carried out according to the following steps:
a. adding the ethanol, the ethyl acetate and the n-propyl acetate which are weighed according to the proportion into a container, and stirring at the normal temperature for 3-5 min at the stirring speed of 500-700r/min to obtain a mixed solution A;
b. sequentially adding polyvinyl butyral resin, aldehyde ketone resin, rosin glycerol ester and cellulose acetate butyrate which are weighed according to the proportion into the mixed solution A, and stirring for 2-4 h at normal temperature with the stirring speed of 800-;
c. adding the polyethylene wax weighed according to the proportion into the mixed solution B, stirring for 1-2 h at the stirring speed of 800-1000r/min until the mixture is completely and uniformly dispersed, wherein the mixing ratio is 1: 1, complementing the mixed solvent of ethanol and ethyl acetate to 100 parts, and filtering by a screen with 180-200 meshes to obtain the gravure pearlescent ink-regulating oil for tipping paper.
Preparing gravure pearlescent ink:
a. the gravure pearlescent ink for tipping paper comprises the following raw materials in parts by weight: 60 parts of gravure pearlescent varnish, 10 parts of pearlescent pigment, 15 parts of ethanol and 15 parts of ethyl acetate.
b. Pre-dispersion of pearlescent pigment: fully wetting the pearlescent pigment by using a mixed solvent of 2.5 parts of ethanol and 2.5 parts of ethyl acetate, then adding 5 parts of gravure pearlescent ink-regulating oil, stirring at normal temperature for 10-15 min at the stirring speed of 500r/min, and uniformly stirring.
c. And adding the pre-dispersed pearlescent pigment into the rest of gravure ink-adjusting oil, finally adding the rest of ethanol and ethyl acetate solvent, stirring at normal temperature for 10-15 min at the stirring speed of 300-500r/min until uniformly stirring to obtain the gravure pearlescent ink.
The prepared gravure pearlescent ink is dried at the temperature of 22-28 ℃ and the relative humidity of 50-60 percent by adopting a printing plate with 80 lines/cm, the drying temperature of 130-2Printing process with wet coating amount of 32-45g/m2Printing the surface of the tipping paper, drying and rolling to obtain the pearlescent tipping paper product. The tipping paper has high glossiness, excellent pearl effect, strong coating adhesive force, no pearl powder removal phenomenon and no odor.
Example 2
The specific formula of the embodiment comprises the following components in parts by weight: 13 parts of polyvinyl butyral resin, 8 parts of cellulose acetate butyrate, 4 parts of aldehyde ketone resin, 4 parts of rosin glyceride, 2 parts of polyethylene wax, 33 parts of ethanol, 33 parts of ethyl acetate and 3 parts of n-propyl acetate.
The production is carried out according to the following steps:
a. adding the ethanol, the ethyl acetate and the n-propyl acetate which are weighed according to the proportion into a container, and stirring at the normal temperature for 3-5 min at the stirring speed of 500-700r/min to obtain a mixed solution A;
b. sequentially adding polyvinyl butyral resin, aldehyde ketone resin, rosin glycerol ester and cellulose acetate butyrate which are weighed according to the proportion into the mixed solution A, and stirring for 2-4 h at normal temperature with the stirring speed of 800-;
c. adding the polyethylene wax weighed according to the proportion into the mixed solution B, stirring for 1-2 h at the stirring speed of 800-1000r/min until the mixture is completely and uniformly dispersed, wherein the mixing ratio is 1: 1, complementing the mixed solvent of ethanol and ethyl acetate to 100 parts, and filtering by a screen with 180-200 meshes to obtain the gravure pearlescent ink-regulating oil for tipping paper.
Preparing gravure pearlescent ink:
a. the gravure pearlescent ink for tipping paper comprises the following raw materials in parts by weight: 60 parts of gravure pearlescent varnish, 15 parts of pearlescent pigment, 12.5 parts of ethanol and 12.5 parts of ethyl acetate.
b. Pre-dispersion of pearlescent pigment: fully wetting the pearlescent pigment by using 4 parts of ethanol and 4 parts of ethyl acetate mixed solvent, then adding 8 parts of gravure pearlescent ink-regulating oil, stirring at normal temperature for 10-15 min at the stirring speed of 300-500r/min, and uniformly stirring.
c. And adding the pre-dispersed pearlescent pigment into the rest of gravure ink-adjusting oil, finally adding the rest of ethanol and ethyl acetate solvent, stirring at normal temperature for 10-15 min at the stirring speed of 300-500r/min until uniformly stirring to obtain the gravure pearlescent ink.
The prepared gravure pearlescent ink is dried at the temperature of 22-28 ℃ and the relative humidity of 50-60 percent by adopting a printing plate with 70 lines/cm, the drying temperature of 130-2Printing process with wet coating amount of 32-45g/m2Printing the surface of the tipping paper, drying and rolling to obtain the pearlescent tipping paper product. The tipping paper has high glossiness, excellent pearl effect, strong coating adhesive force, no pearl powder removal phenomenon and no odor.
Example 3
The specific formula of the embodiment comprises the following components in parts by weight: 10 parts of polyvinyl butyral resin, 10 parts of cellulose acetate butyrate, 5 parts of aldehyde ketone resin, 5 parts of rosin glyceride, 3 parts of polyethylene wax, 31.5 parts of ethanol, 31.5 parts of ethyl acetate and 4 parts of n-propyl acetate.
The production is carried out according to the following steps:
a. adding the ethanol, the ethyl acetate and the n-propyl acetate which are weighed according to the proportion into a container, and stirring at the normal temperature for 3-5 min at the stirring speed of 500-700r/min to obtain a mixed solution A;
b. sequentially adding polyvinyl butyral resin, aldehyde ketone resin, rosin glycerol ester and cellulose acetate butyrate which are weighed according to the proportion into the mixed solution A, and stirring for 2-4 h at normal temperature with the stirring speed of 800-;
c. adding the polyethylene wax weighed according to the proportion into the mixed solution B, stirring for 1-2 h at the stirring speed of 800-1000r/min until the mixture is completely and uniformly dispersed, wherein the mixing ratio is 1: 1, complementing the mixed solvent of ethanol and ethyl acetate to 100 parts, and filtering by a screen with 180-200 meshes to obtain the gravure pearlescent ink-regulating oil for tipping paper.
Preparing gravure pearlescent ink:
a. the gravure pearlescent ink for tipping paper comprises the following raw materials in parts by weight: 60 parts of gravure pearlescent varnish, 20 parts of pearlescent pigment, 10 parts of ethanol and 10 parts of ethyl acetate.
b. Pre-dispersion of pearlescent pigment: fully wetting the pearlescent pigment by using 5 parts of ethanol and 5 parts of ethyl acetate mixed solvent, then adding 10 parts of gravure pearlescent ink-regulating oil, stirring at normal temperature for 10-15 min at the stirring speed of 300-500r/min, and uniformly stirring.
c. And adding the pre-dispersed pearlescent pigment into the rest of gravure ink-adjusting oil, finally adding the rest of ethanol and ethyl acetate solvent, stirring at normal temperature for 10-15 min at the stirring speed of 300-500r/min until uniformly stirring to obtain the gravure pearlescent ink.
The prepared gravure pearlescent ink is dried at the temperature of 22-28 ℃ and the relative humidity of 50-60 percent by adopting a printing plate with 60 lines/cm, the drying temperature of 130-2Printing process with wet coating amount of 32-45g/m2Printing the surface of the tipping paper, drying and rolling to obtain the pearlescent tipping paper product. The tipping paper has high glossiness, excellent pearl effect, strong coating adhesive force, no pearl powder removal phenomenon and no odor.

Claims (3)

1. The gravure pearlescent varnish for tipping paper is characterized by comprising the following raw materials in parts by weight: 5-25 parts of polyvinyl butyral resin, 5-20 parts of cellulose acetate butyrate, 1-10 parts of aldehyde ketone resin, 1-10 parts of rosin glyceride, 1-10 parts of anti-settling agent and 50-80 parts of solvent; the anti-settling agent is polyethylene wax; the solvent consists of ethanol, ethyl acetate and n-propyl acetate, and the solvent comprises the following components in parts by weight: 30-35 parts of ethanol, 30-35 parts of ethyl acetate and 2-4 parts of n-propyl acetate.
2. The gravure pearlescent varnish for tipping paper according to claim 1, wherein the raw materials are as follows in parts by weight: 10-15 parts of polyvinyl butyral resin, 6-10 parts of cellulose acetate butyrate, 3-5 parts of aldehyde ketone resin, 3-5 parts of rosin glyceride, 1-3 parts of anti-settling agent and 65-75 parts of solvent.
3. The method of preparing gravure pearlescent varnish for tipping paper according to claim 1 or 2, characterized by comprising the steps of:
a. adding the ethanol, the ethyl acetate and the n-propyl acetate which are weighed according to the proportion into a container, and stirring at the normal temperature for 3-5 min at the stirring speed of 500-700r/min to obtain a mixed solution A;
b. sequentially adding polyvinyl butyral resin, aldehyde ketone resin, rosin glycerol ester and cellulose acetate butyrate which are weighed according to the proportion into the mixed solution A, and stirring for 2-4 h at normal temperature with the stirring speed of 800-;
c. adding the polyethylene wax weighed according to the proportion into the mixed solution B, stirring for 1-2 h at the stirring speed of 800-1000r/min until the mixture is completely and uniformly dispersed, wherein the mixing ratio is 1: 1, adding the mixed solvent of ethanol and ethyl acetate to 100 parts, and passing through a 180-200 mesh sieve
Filtering by a screen to obtain the gravure pearlescent varnish for tipping paper.
CN201810126109.8A 2018-02-08 2018-02-08 Gravure pearlescent varnish for tipping paper and preparation method thereof Active CN108264797B (en)

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