阅读说明：本技术 一种能实现局部镭射转移的平版胶印墨斗uv光油及平版胶印方法 (Lithographic offset printing ink fountain UV gloss oil capable of realizing local laser transfer and lithographic offset printing method ) 是由 廖文 何润添 郭栋士 杨雄威 陈庆雄 于 2020-06-11 设计创作，主要内容包括：一种能实现局部镭射转移的平版胶印墨斗UV光油,包括树脂、单体、胺增效剂和光引发剂；所述的树脂包括两官能度丙烯酸低聚物和四官能度的氨改性丙烯酸酯,所述的两官能度丙烯酸低聚物选自环氧丙烯酸酯或聚酯丙烯酸酯；所述的单体为丙烯酸单体；所述的胺增效剂为丙烯酸酯类胺增效剂。该平版胶印墨斗UV光油能通过平版胶印的方法,达到良好的局部镭射转移的效果,镭射效果强、印刷生产效率高。(A lithographic offset printing ink fountain UV gloss oil capable of realizing local laser transfer comprises resin, monomers, an amine synergist and a photoinitiator; the resin comprises bifunctional acrylic acid oligomer and tetrafunctional ammonia modified acrylate, wherein the bifunctional acrylic acid oligomer is selected from epoxy acrylate or polyester acrylate; the monomer is acrylic acid monomer; the amine synergist is acrylate amine synergist. The UV gloss oil of the offset lithographic printing ink fountain can achieve a good local laser transfer effect through an offset lithographic printing method, and is strong in laser effect and high in printing production efficiency.)

1. A lithographic offset printing ink fountain UV gloss oil capable of realizing local laser transfer comprises resin, monomers, an amine synergist and a photoinitiator, and is characterized in that the resin is a mixture of a plurality of monomers; the resin comprises bifunctional acrylic acid oligomer and tetrafunctional ammonia modified acrylate, wherein the bifunctional acrylic acid oligomer is selected from epoxy acrylate or polyester acrylate; the monomer is acrylic acid monomer; the amine synergist is acrylate amine synergist.

2. The offset lithographic ink fountain UV varnish capable of achieving local laser transfer as claimed in claim 1, wherein the contents of the components are as follows:

40-55 wt% of epoxy acrylate/polyester acrylate;

1-5 wt% of ammonia modified acrylate;

25-35 wt% of monomer;

5-15 wt% of an amine synergist;

1-6 wt% of a photoinitiator.

3. The offset lithographic ink fountain UV varnish capable of achieving local laser transfer as claimed in claim 2, wherein the contents of the components are as follows:

45-50 wt% of epoxy acrylate/polyester acrylate;

5wt% of ammonia modified acrylic ester;

25-30 wt% of monomer;

10wt% of amine synergist;

5wt% of photoinitiator.

4. The offset lithographic ink fountain UV varnish capable of achieving local laser transfer of claim 1, wherein the offset lithographic ink fountain UV varnish comprises:

40-55 wt% of epoxy acrylate;

5wt% of ammonia modified acrylic ester;

5-15 wt% of polyester acrylate;

25-30 wt% of monomer;

10wt% of amine synergist;

5wt% of photoinitiator.

5. The offset lithographic ink fountain UV varnish capable of achieving local laser transfer as claimed in claim 4, wherein the epoxy acrylate is Sandoma CN 104; polyester acrylate is melamine PS 2522; resin C is Meiyuan A104.

6. The offset lithographic ink fountain UV varnish according to any one of claims 2 to 4, wherein the monomer is one or more selected from the group consisting of monofunctional acrylic monomers, 2-functional acrylic monomers and 3-functional acrylic monomers.

7. The offset lithographic fountain UV varnish according to claim 6, wherein the monomer is selected from one or more of trimethylolpropane triacrylate, 3- (ethoxy) trimethylolpropane triacrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, 1, 6-hexanediol diacrylate, and (propoxy) glycerol triacrylate.

8. The offset lithographic ink fountain UV varnish according to any one of claims 2 to 4, wherein the photoinitiator is preferably one or more of benzophenone, (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide, and 1-hydroxycyclohexylphenylketone.

9. The offset lithographic ink fountain UV varnish capable of realizing local laser transfer according to any one of claims 2 to 4, further comprising one or more of a leveling assistant, an abrasion-resistant assistant and a stabilizer, wherein the content of each assistant is 0.1 to 1wt%, and the leveling assistant is a dimethyl siloxane- (propylene oxide-ethylene oxide) block copolymer; the wear-resistant auxiliary agent is acrylate polysiloxane; the stabilizer is p-hydroxyanisole.

10. An offset lithographic printing method for achieving local laser transfer using the offset lithographic printing ink fountain UV varnish according to any one of claims 1 to 9, comprising the steps of:

s1: directly manufacturing a laser transfer plate according to the position where local laser transfer is required, and printing the UV gloss oil of the offset lithographic ink fountain on the target position of a target substrate by using the laser transfer plate to realize accurate overprint local glazing;

s2: and compounding the part which is locally polished with a laser transfer film under the condition of not being dried by a UV lamp, irradiating by UV light, instantly curing and drying, and peeling off the laser transfer film to finish local laser transfer.

Technical Field

The invention belongs to the technical field of offset lithography, and particularly relates to offset lithography ink fountain UV gloss oil capable of realizing local laser transfer and an offset lithography method.

Background

The laser transfer process has been created and applied in developed countries abroad for more than ten years, and the laser transfer has various patterns and bright patterns, so that the laser transfer can generate unseen visual impact for people due to high grade and fineness, and a new concept of cognition of people on packaging and printing is created. The laser transfer printed matter is deeply applied to various fields of cigarette packaging, cosmetic packaging, wine box packaging, medicine packaging and gift box packaging, and is gradually and widely applied to people.

The principle of the laser transfer process is as follows: and (3) forming a laser transfer film (a transparent laser original film) on the laser film formed after mould pressing without aluminum plating, and directly pressing the laser transfer film and a printed product through UV gloss oil to transfer laser pictures and texts on the surface of the printed product. The specific operation steps are as follows: and (3) pressing the printed matter with a laser transfer film (transparent laser original film) under the condition of UV glazing (UV gloss oil) and without UV lamp drying, then instantly curing and drying through UV light irradiation, and finishing the laser transfer process of the product after the film is peeled.

Because the performance of the existing UV gloss oil is limited, the UV gloss oil is more suitable for full-page transfer, but the production is difficult under the condition of high requirements on local transfer and overprint: when the existing ink fountain UV gloss oil is used for local transfer, a laser transfer plate is manufactured according to the part needing local transfer actually, the plate making cost is low, the overprinting precision is high, but ink emulsification is easy to generate during printing, the formed ink layer is thin, the gloss of a printed finished product is common, and the diffraction effect generated by transfer is not obvious.

Disclosure of Invention

The first purpose of the invention is to provide lithographic offset printing ink fountain UV gloss oil capable of realizing local laser transfer, which can achieve good local laser transfer effect through a lithographic offset printing method, and has strong laser effect and high printing production efficiency.

The second purpose of the invention is to provide a lithographic offset printing method for realizing local laser transfer by using the UV gloss oil.

The first purpose of the invention is realized by the following technical scheme:

a lithographic offset printing ink fountain UV gloss oil capable of realizing local laser transfer comprises resin, monomers, an amine synergist and a photoinitiator;

the resin comprises bifunctional acrylic acid oligomer and tetrafunctional ammonia modified acrylate, wherein the bifunctional acrylic acid oligomer is selected from epoxy acrylate or polyester acrylate; the monomer is acrylic acid monomer; the amine synergist is acrylate amine synergist.

Compared with the existing UV gloss oil for coating and ink fountain UV gloss oil, the UV gloss oil for offset lithography ink fountain disclosed by the invention can better meet the requirement of local laser transfer: the UV gloss oil for the offset lithographic ink fountain adopts the combination of acrylic oligomer with two functionality degrees and ammonia modified acrylic ester with four functionality degrees, and the resin combination brings the following advantages: the ink fountain UV gloss oil has good water resistance, shows good ink balance characteristic and high reactivity in the process of local laser transfer in offset lithography, has less emulsification phenomenon, and forms a moderate ink layer thickness, so that the ink fountain UV gloss oil has good printing applicability on offset lithography printing machines; secondly, the adhesive force is good for substrates made of different materials, so that a larger selection space is provided for a target substrate subjected to local laser transfer; high glossiness, and good laser diffraction effect.

Based on the total mass of the UV gloss oil of the offset lithographic printing ink fountain, the contents of the components are as follows:

40-55 wt% of epoxy acrylate or polyester acrylate;

1-5 wt% of ammonia modified acrylate;

25-35 wt% of monomer;

5-15 wt% of an amine synergist;

1-6 wt% of a photoinitiator.

Preferably, the content of each component is as follows:

45-50 wt% of epoxy acrylate or polyester acrylate;

5wt% of ammonia modified acrylic ester;

25-30 wt% of monomer;

10wt% of amine synergist;

5wt% of photoinitiator.

More preferably, the offset lithographic ink fountain UV varnish comprises:

40-55 wt% of epoxy acrylate;

5wt% of ammonia modified acrylic ester;

5-15 wt% of polyester acrylate;

25-30 wt% of monomer;

10wt% of amine synergist;

5wt% of photoinitiator.

I.e. a combination of three different types of resins at the same time. Preferably, the epoxy acrylate is sand polyma CN 104; selecting American source PS2522 from polyester acrylate; resin C was selected from Meiyuan A104.

The monomer is selected from one or more of monofunctional acrylic monomers, 2-functional acrylic monomers and 3-functional acrylic monomers, and specifically, the monomer is selected from one or more of trimethylolpropane triacrylate (TMPTA), 3- (ethoxy) trimethylolpropane triacrylate (TMP (EO3) TA), dipropylene glycol diacrylate (DPGDA), tripropylene glycol diacrylate (TPGDA), 1, 6-hexanediol diacrylate (HDDA), and (propoxy) glycerol triacrylate (GPTA). When any one or more of the monomers are combined, the aim of local laser transfer can be fulfilled, and the reaction speed, the chemical resistance, the water resistance and the adhesive force of the product can be better balanced under the condition of using various monomer combinations.

The amine synergist is preferably an amino-modified acrylate.

The photoinitiator is preferably one or more of Benzophenone (BP), (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide (TPO) and 1-hydroxycyclohexyl phenyl ketone (photoinitiator 184). The above-mentioned photoinitiator can promote surface curing and deep curing and can accelerate the curing speed.

The UV gloss oil of the offset lithographic ink fountain can also comprise other functional additives for improving the overall performance of the gloss oil, and specifically comprises one or more of leveling additives, wear-resistant additives and stabilizers, wherein the content of each additive is 0.1-1 wt%, and the leveling additives are preferably dimethyl siloxane- (propylene oxide-ethylene oxide) block copolymers; the wear-resistant auxiliary agent is preferably acrylate polysiloxane; the stabilizer is preferably p-hydroxyanisole.

The second purpose of the invention is realized by the following technical scheme:

an offset lithographic printing method for realizing local laser transfer by using the UV gloss oil of the offset lithographic printing ink fountain comprises the following steps:

s1: directly manufacturing a laser transfer plate according to the position where local laser transfer is required, and printing the UV gloss oil of the offset lithographic ink fountain on the target position of a target substrate by using the laser transfer plate to realize accurate overprint local glazing;

s2: and compounding the part which is locally polished with a laser transfer film under the condition of not being dried by a UV lamp, irradiating by UV light, instantly curing and drying, and peeling off the laser transfer film to finish local laser transfer.

Compared with the prior art, the invention has the following beneficial effects:

1. the UV gloss oil of the offset lithographic printing ink fountain realizes local laser transfer, and compared with a flexo printing resin plate, overprinting is finer, so that the offset lithographic printing ink fountain can meet the printing requirement of higher precision;

2. compared with a flexo printing resin plate and a gravure printing plate roller, the lithographic offset printing ink fountain UV gloss oil has lower plate making cost for realizing local laser transfer, and is suitable for large-scale production and application;

3. compared with silk-screen laser transfer and full-plate transfer ink fountain UV matte oil, the UV gloss oil for the offset lithographic printing ink fountain disclosed by the invention has the advantages that the local laser transfer efficiency is higher, and the long-time cost of printing production is reduced;

4. compared with the conventional UV gloss oil for the offset lithographic ink fountain, the UV gloss oil for the offset lithographic ink fountain disclosed by the invention has the advantages that the local laser transfer gloss is high, and the visual effect is better;

5. the UV gloss oil process for the offset lithographic printing ink fountain is very flexible in matching, and can realize multiple printing processes of reverse frosting, transparent laser, touch and transparent laser, non-coated paper, transparent laser, coated UV gloss oil, transparent laser and the like.

Detailed Description

The present invention will be further described with reference to the following specific examples.