CN102295858A - Photo-curable screen printing ink and preparation method thereof - Google Patents

Abstract

The invention discloses a photo-curable screen printing ink and preparation method thereof. The photo-curable screen printing ink comprises the following components in percentage by weight: 34-42 percent of unsaturated ultraviolet (UV) polyester resin, 15-20 percent of UV light polyurethane resin, 25-35 percent of UV monomer, 4-10 percent of paint, 4-8 percent of photoinitiator and 0.2-0.6 percent of auxiliary agent. The photo-curable screen printing ink has the advantages of environmental friendliness, no toxicity, low cost and wide application range and can be used for printing on packages of foods, medicines, toys and the like.

Description

Photocuring silk-screen ink and manufacture method thereof

Technical field

The present invention relates to a kind of printing-ink and manufacture method thereof, particularly relate to a kind of photocuring silk-screen ink and manufacture method thereof, can be widely used in the printing of packings such as food, medicine, toy.

Background technology

Traditional printing-ink that is used to pack, the organic solvent that often contains high level, because organic solvent has certain toxicity, easy volatilization contaminate environment, can influence the healthy of user because of residue simultaneously, thereby can't be applied on the packing of food, medicine, toy etc., and its cost is also higher.

Summary of the invention

The present invention is directed to the defective of prior art, a kind of environment-protecting asepsis, photocuring silk-screen ink and manufacture method thereof with low cost are provided.

Technical scheme of the present invention is as follows:

A kind of photocuring silk-screen ink, by weight, its component and content comprise: unsaturated UV-light vibrin 34%～42%, UV ultraviolet radiation polyurethane resin 15%～20%, UV monomer 25%～35%, pigment 4%～10%, light trigger 4%～8%, auxiliary agent 0.2%～0.6%.

By weight, described unsaturated UV-light vibrin was formed 150-160 ℃ of reaction by 20%～30% glycol diacrylate, 5%～15% trimethylolpropene triacrylate, 5%～15% triglycerin diacrylate and 50%～60% 190 polyester in 2-4 hour.

Described UV ultraviolet radiation polyurethane resin is a glycol diacrylate.

By weight, described UV monomer comprises 70%～80% glycol diacrylate, 10%～15% triglycerin diacrylate and 10%～15% trimethylolpropene triacrylate.

By weight, described light trigger comprises 33%～38% 4-phenyl benzophenone, 50%～60% 184D photosensitizers and 2.4.6-Three methyl Benzene acyl group-diphenyl phosphine oxide of 7%～12%.

By weight, described auxiliary agent comprises 50% defoamer and 50% oxidation inhibitor.

The manufacture method of photocuring silk-screen ink of the present invention comprises the steps:

A. by proportioning described glycol diacrylate, trimethylolpropene triacrylate, triglycerin diacrylate and 190 polyester are dropped into reactor, obtained described unsaturated UV-light vibrin in 2-4 hour 150-160 ℃ of reaction;

B. stirred 25-35 minute after in above-mentioned unsaturated UV-light vibrin, adding light trigger and auxiliary agent;

C. add the UV monomer again and dissolve, dissolving thoroughly back adds pigment and is uniformly dispersed;

D. at last will above-mentioned pre-dispersed printing ink starch to render on the three-roller to roll for 4-6 time and grind, survey its fineness and reach below 3 microns, carry out Quality Detection again, treat laser curing velocity, printability, get final product discharging when viscosity meets the requirements.

Compared with prior art, photocuring silk-screen ink of the present invention do not have any organic solvent and toxic substance residual, and this printing ink adopts ultraviolet light polymerization after printing, guaranteed the environment-protecting asepsis requirement of printing, meet the VOC emission standard, can be applicable to the packages printing in fields such as toy, food, medicine, electronics; Printing ink is with low cost, can reduce about 20%; Aspect printing material, not only adapt to individual paper.And adapt to individual PE, ABS, PET isopolarity stock, have wide range of applications.

Embodiment

The present invention is described in further detail below in conjunction with embodiment.

Photocuring silk-screen ink of the present invention, (following identical) by weight, its component and content comprise: unsaturated UV-light vibrin 34%～42%, UV ultraviolet radiation polyurethane resin 15%～20%, UV monomer 25%～35%, pigment 4%～10%, light trigger 4%～8%, auxiliary agent 0.2%～0.6%.

Wherein, described unsaturated UV-light vibrin was formed 150-160 ℃ of reaction by 20%～30% glycol diacrylate (HDDA), 5%～15% trimethylolpropene triacrylate (TMPTA), 5%～15% triglycerin diacrylate (TPGDA) and 50%～60% 190 polyester in 2-4 hour.Described UV ultraviolet radiation polyurethane resin is a reactive thinner, can adopt HDDA, i.e. glycol diacrylate.Described UV monomer is a reactive thinner also, comprises 70%～80% glycol diacrylate, 10%～15% triglycerin diacrylate and 10%～15% trimethylolpropene triacrylate.Described light trigger adopts the compound light trigger; help the curing of printing ink, it comprises 33%～38% 4-phenyl benzophenone (PBZ), 50%～60% 184D photosensitizers and 2.4.6-Three methyl Benzene acyl group-diphenyl phosphine oxide (TPO) of 7%～12%.Described auxiliary agent comprises that Taiwan of 50% produces the U.S. of 6800 defoamers and 50% and produce oxidation inhibitor 47V500, can prevent the ink film pin hole and keep printing ink stable.

In one embodiment, the prescription of described unsaturated UV-light vibrin adopts: 25% glycol diacrylate (HDDA), 10% trimethylolpropene triacrylate (TMPTA), 10% triglycerin diacrylate (TPGDA) and 55% 190 polyester.Described UV monomer is made up of 75% glycol diacrylate (HDDA), 12.5% triglycerin diacrylate (TPGDA) and 12.5% trimethylolpropene triacrylate (TMPTA).Described light trigger is made up of 36.36% 4-phenyl benzophenone (PBZ), 54.55% 184D photosensitizers and 2.4.6-Three methyl Benzene acyl group-diphenyl phosphine oxide (TPO) of 9.09%.

Below be photocuring silk-screen ink of the present invention several embodiment that fill a prescription:

Embodiment one, each component and content are: unsaturated UV-light vibrin 38%, UV ultraviolet radiation polyurethane resin 19.6%, UV monomer 30%, pigment 6%, light trigger 6%, auxiliary agent 0.4%.

Embodiment two, each component and content are: unsaturated UV-light vibrin 35%, UV ultraviolet radiation polyurethane resin 18%, UV monomer 34%, pigment 5%, light trigger 7.7%, auxiliary agent 0.3%.

Embodiment three, each component and content are: unsaturated UV-light vibrin 42%, UV ultraviolet radiation polyurethane resin 16%, UV monomer 27%, pigment 9.5%, light trigger 5%, auxiliary agent 0.5%.

Below only be several specific embodiment of the present invention, can also within the scope of the invention said components and content thereof be suitably adjusted according to printing kind, print speed, drying conditions etc.

The manufacture method of photocuring silk-screen ink of the present invention comprises the steps:

A. by proportioning described glycol diacrylate, trimethylolpropene triacrylate, triglycerin diacrylate and 190 polyester are dropped into reactor, obtained described unsaturated UV-light vibrin in 3 hours 150-160 ℃ of reaction;

B. stirred 30 minutes after in above-mentioned unsaturated UV-light vibrin, adding light trigger and auxiliary agent;

C. add the UV monomer again and dissolve, dissolving thoroughly back adds pigment and is uniformly dispersed;

D. at last will above-mentioned pre-dispersed printing ink starch to render on the three-roller to roll for 4-6 time and grind, surveying its fineness reaches below 3 microns, carry out Quality Detection again, treat laser curing velocity, printability, get final product discharging when viscosity meets the requirements, packing can obtain photocuring silk-screen ink product of the present invention.

Below be UV silk-screen ink test item and technical parameter

1. viscosity (rotational viscosimeter): 8000～12000;

2. printability (dedicated test silk-screen brush net is done and scraped the sample contrast): the froth breaking levelling, it is clear smoothly to cross net;

3. laser curing velocity (3 kw of power, 60 meters/minute of transfer rates): ink film solidifies thoroughly dry;

4. sticking power (drawing): do not have and come off so that the 3M adhesive tape is sticking;

5. color (requiring below the DE:1): qualified with color analyzer;

6. glossiness (with spectrophotometer): 95 °.

Claims (7)

1. photocuring silk-screen ink, it is characterized in that: by weight, its component and content comprise: unsaturated UV-light vibrin 34%～42%, UV ultraviolet radiation polyurethane resin 15%～20%, UV monomer 25%～35%, pigment 4%～10%, light trigger 4%～8%, auxiliary agent 0.2%～0.6%.

2. photocuring silk-screen ink according to claim 1, it is characterized in that: by weight, described unsaturated UV-light vibrin was formed 150-160 ℃ of reaction by 20%～30% glycol diacrylate, 5%～15% trimethylolpropene triacrylate, 5%～15% triglycerin diacrylate and 50%～60% 190 polyester in 2-4 hour.

3. photocuring silk-screen ink according to claim 1 is characterized in that: described UV ultraviolet radiation polyurethane resin is a glycol diacrylate.

4. according to claim 1,2 or 3 described photocuring silk-screen inks, it is characterized in that: by weight, described UV monomer comprises 70%～80% glycol diacrylate, 10%～15% triglycerin diacrylate and 10%～15% trimethylolpropene triacrylate.

5. according to claim 1,2 or 3 described photocuring silk-screen inks; it is characterized in that: by weight, described light trigger comprises 33%～38% 4-phenyl benzophenone, 50%～60% 184D photosensitizers and 2.4.6-Three methyl Benzene acyl group-diphenyl phosphine oxide of 7%～12%.

6. according to claim 1,2 or 3 described photocuring silk-screen inks, it is characterized in that: by weight, described auxiliary agent comprises 50% defoamer and 50% oxidation inhibitor.

7. the manufacture method of a photocuring silk-screen ink as claimed in claim 1 is characterized in that, this method comprises the steps:

A. by proportioning described glycol diacrylate, trimethylolpropene triacrylate, triglycerin diacrylate and 190 polyester are dropped into reactor, obtained described unsaturated UV-light vibrin in 2-4 hour 150-160 ℃ of reaction;

B. stirred 25-35 minute after in above-mentioned unsaturated UV-light vibrin, adding light trigger and auxiliary agent;

C. add the UV monomer again and dissolve, dissolving thoroughly back adds pigment and is uniformly dispersed;

D. at last will above-mentioned pre-dispersed printing ink starch to render on the three-roller to roll for 4-6 time and grind, survey its fineness and reach below 3 microns, carry out Quality Detection again, treat laser curing velocity, printability, get final product discharging when viscosity meets the requirements.