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Screen printing ink for polypropylene material and preparation method thereof

A polypropylene material and screen printing technology, applied in the field of ink, can solve problems such as uneven blanking density, PP products that cannot be printed, poor adhesion, etc., and achieve good ink adhesion, cost saving, and stable performance Effect

Active Publication Date: 2021-02-05
QINGDAO HAIBAILI MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, because the molecular chain of polypropylene (PP) materials does not contain polar polar groups, the surface energy is extremely low, and the general ink screen printing is used, and its adhesion is extremely poor. Many products that need to be printed are appearance parts and are not allowed to be used. The PP treatment agent treats the surface, so the surface energy of PP products cannot meet the requirements of printing. According to the data, the surface energy of at least 40 dynes can meet the requirements of printing adhesion, but the surface energy of common PP products is only 30 dyne left and right
On the other hand, the blanking density of injection molding products is not uniform during the injection molding process, and the products also have anisotropy. The same ink, the same screen and screen scraping, the former part is qualified, and the latter part may be Unqualified; In addition, during the printing process, the diluent is constantly volatile, and the viscosity of the ink is constantly changing, so it will also cause the thickness of the curing agent to vary.
The non-treatment inks on the market can not meet the adhesion requirements of customers

Method used

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  • Screen printing ink for polypropylene material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Accurately weigh each raw material component according to the following formula:

[0024] 25 parts of polypropylene resin (225 powder); 18 parts of solvent; 16 parts of pigment; 0.3 parts of dispersant; 0.3 parts of leveling agent; The pigment is composed of 0.7 parts of black powder, 14.8 parts of white powder, 0.3 parts of yellow powder and 0.2 parts of blue powder; the dispersant is BYK163, the leveling agent is BYK333, and the filler is organic bentonite (MP-100) It consists of 9 parts of silicon oxide (ST-30) and 10 parts of nano-scale calcium carbonate.

[0025] Preparation process: Put polypropylene resin into the preparation container, then put in n-butyl acetate and dispersant in turn, disperse with a disperser, slowly increase the speed to 1000r / min, disperse for 5min-10min until the above raw materials are fully mixed; Put the pigments into the above materials in turn, disperse at a speed of 1500r / min-2000r / min for 20min-30min until the dispersion is uniform...

Embodiment 2

[0027] Accurately weigh each raw material component according to the following formula:

[0028] 30 parts of polypropylene resin; 22.3 parts of solvent; 21.2 parts of pigment; 0.5 parts of dispersant; 0.5 parts of leveling agent; 0.7 parts of powder, 20 parts of white powder, 0.3 parts of yellow powder and 0.2 parts of blue powder; the dispersant is BYK163, the leveling agent is BYK333, and the filler consists of 1 part of organic bentonite, 11 parts of silicon dioxide and nano-scale calcium carbonate 13.5 parts composition.

[0029] Refer to Example 1 for the preparation process.

Embodiment 3

[0031] Accurately weigh each raw material component according to the following formula:

[0032] 30 parts of polypropylene resin; 24 parts of solvent; 21.2 parts of pigment; 0.5 parts of dispersant; 0.5 parts of leveling agent; 0.7 parts of powder, 20 parts of white powder, 0.3 parts of yellow powder and 0.2 parts of blue powder; the dispersant is BYK163, the leveling agent is BYK333, and the filler consists of 1 part of organic bentonite, 11 parts of silicon dioxide and nano-scale calcium carbonate 13.5 parts composition.

[0033] Refer to Example 1 for the preparation process.

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Abstract

The invention belongs to the technical field of ink, and in particular relates to a screen printing ink used on the surface of a polypropylene material and a preparation method thereof. The screen printing ink for this polypropylene material comprises the following components in parts by weight: 25-35 parts of polypropylene resin; 18-26 parts of solvent; 16-24 parts of pigment; 0.3-0.8 part of dispersant; 0.3 parts of leveling agent ‑0.8 part; filler 20‑30 part. Using the screen printing ink of the present invention, it is not necessary to carry out surface treatment on polypropylene products before printing, and can be printed directly, avoiding the adverse effects of surface treatment agents, flame machine and corona treatment on product appearance, saving costs, and good ink adhesion. The performance is stable and can meet the requirements of appearance products.

Description

technical field [0001] The invention belongs to the technical field of inks, and in particular relates to a treatment-free screen printing ink used on the surface of polypropylene materials and a preparation method thereof. Background technique [0002] Printing is one of the important means to improve product appearance, convey product selling points, and product performance identification. It is low-cost and widely used. The printing of polypropylene (PP) products has always been a recognized problem in the industry. On the one hand, because the molecular chain of polypropylene (PP) materials does not contain polar polar groups, the surface energy is extremely low, and the general ink screen printing is used, and its adhesion is extremely poor. Many products that need to be printed are appearance parts and are not allowed to be used. The PP treatment agent treats the surface, so the surface energy of PP products cannot meet the requirements of printing. According to the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/108C09D11/033C09D11/037C09D11/03
CPCC09D11/03C09D11/033C09D11/037C09D11/108
Inventor 孙涛
Owner QINGDAO HAIBAILI MACHINERY