Kraft paper large ink position printing method and kraft paper for packaging

A printing method and technology of kraft paper, applied in printing, biological packaging, printing devices, etc., can solve the problems of kraft paper through-ground color, limited effect, thin thickness, etc., and achieve the effect of smooth pattern, strong texture and uniform ink color

Pending Publication Date: 2022-08-05
DONGGUAN MYS ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are two main methods of printing patterns on kraft paper on the market: one is to solve the problem of paper powder and hair loss before printing. For example, printing a layer of water-based varnish on kraft paper before printing can solve the problem of kraft paper. The problem of paper powder and hair loss, but the thickness of the printed layer of water-based varnish is thin and its effect is limited, and the kraft paper still has the risk of showing through the background color; the other is to increase the thickness of the ink layer during the printing process, so that Can effectively improve the printing color effect, such as using UV ink printing, UV ink does not contain volatile organic solvents, less pollution, can effectively improve the printing color effect, but the supporting equipment related to UV ink printing still needs to be perfected and ink limitations, higher cost

Method used

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  • Kraft paper large ink position printing method and kraft paper for packaging
  • Kraft paper large ink position printing method and kraft paper for packaging
  • Kraft paper large ink position printing method and kraft paper for packaging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] like figure 1 As shown, a large ink level printing method for kraft paper according to a preferred embodiment of the present invention can perform large ink level printing on kraft paper with excellent effect, and the amount of ink when printing graphics and texts is also greatly reduced, reducing production costs.

[0031] Based on the above technical solution, the present embodiment provides a large ink level printing method for kraft paper, comprising the following steps:

[0032] S100, printing a base color layer of the same color as the kraft paper on the surface of the kraft paper;

[0033] Before printing on the surface of the kraft paper in step S100, the kraft paper is pretreated. First, remove the damaged paper and the paper with uneven surface, then clean the impurities on the surface of the paper, and then hang it to dry for 48 hours, so that the temperature and humidity of the kraft paper are consistent with the temperature and humidity of the printing wor...

Embodiment 2

[0040] The steps of this embodiment are the same as those of Embodiment 1, except that steps S100 and S200 are large ink level printing. Compared with the traditional printing method of printing smaller images and texts, the display effect of images and texts on kraft paper is improved.

[0041] Preferably, in step S100, spot-color ink is used for printing. Compared with four-color printing, spot-color printing has a high degree of color reproduction. The spot-color ink can improve the printing effect of kraft paper printing, and can effectively retain the original kraft paper. The background color and texture make the choice of printing colors of kraft paper wider, suitable for the printing of various graphics and texts.

[0042] Specifically, by performing one printing on the surface of the kraft paper in step S100, the situation of powder removal and hair loss that will occur during the printing process of the graphic layer due to the poor surface smoothness of the kraft pap...

Embodiment 3

[0052] Preferably, the ink components used in printing are:

[0053] Organic pigments, accounting for 28 to 32% by mass;

[0054] Connecting material, the mass ratio is 22 to 24%;

[0055] Soybean oil, 14% to 16% by mass;

[0056] Vegetable oils other than soybean oil, accounting for 8% by mass;

[0057] Mineral oil, 18% to 22% by mass;

[0058] Filler, accounting for 1% to 3% by mass;

[0059] Wax, 3% to 5% by mass;

[0060] The ink viscosity was adjusted to 72 to 74 Pa·s using silicone oil, and the pH value was 8.2 to 9.5.

[0061] Among them, the connecting material includes high molecular resin, plasticizer and low molecular resin. The polymer resin is chlorinated natural rubber. The plasticizer adopts dibutyl phthalate, dioctyl phthalate, and butyl stearate. The low molecular weight resin adopts natural rosin ester and dimerized rosin pentaerythritol ester.

[0062] Wherein, the filler is talcum powder;

[0063] Specifically, the percentage content of each compo...

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Abstract

The invention relates to the technical field of printing methods, and discloses a kraft paper large-ink-position printing method which comprises the following steps: printing a bottom color layer with the same color as kraft paper on the surface of the kraft paper; and printing the image-text layer on the ground color layer. And the bottom color layer is printed by spot color ink. And the image-text layer is printed by using spot color ink. The density of the adopted kraft paper is 110-120 g/m < 2 >, the thickness is 0.2-0.25 mm, the tightness of the kraft paper is 0.76-0.85 g/cm < 2 >, the water absorption is 38-40 g/m < 2 >, the smoothness is 12-15 s, the burst index is 3.42-3.6 KPa.m < 2 >/g, and the minimum folding strength in the transverse direction is 80 times. The kraft paper raw material is sulfate larch pulp. The invention also provides the kraft paper for packaging, which is prepared by using the kraft paper large ink position printing method. The kraft paper printing effect is smooth and clean in characters and patterns, clear and complete in edge, uniform in ink color, rich in layer, high in texture and saturated in color, and the kraft paper printing effect is greatly improved.

Description

technical field [0001] The invention relates to the technical field of printing methods, in particular to a large ink level printing method for kraft paper and kraft paper for packaging. Background technique [0002] With the continuous development of my country's economy, the consumption capacity of the general public has been greatly improved. Almost all products in today's society require packaging, and paper packaging accounts for the largest proportion of various packaging methods. The demand for paper packaging also continues to rise with the increase in consumer demand. Because the wood fiber used in kraft paper is relatively long and firm, its toughness and strength are far higher than those of coated paper and white cardboard. Based on this characteristic of kraft paper, kraft paper is often used in the packaging of daily consumer goods. [0003] Kraft paper is characterized by loose and porous structure, long paper fibers, and its own pulp color in appearance. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M1/06B41M1/18C09D11/03C09D11/037C09D11/06C09D11/08C09D11/10C09D11/12
CPCB41M1/18B41M1/06C09D11/037C09D11/03C09D11/10C09D11/08C09D11/06C09D11/12Y02W90/10
Inventor 苏洁岚占小富李星曌黄泽晓
Owner DONGGUAN MYS ENVIRONMENTAL PROTECTION TECH
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