Printing ink for polypropylene material and preparation method thereof

Abstract

The invention discloses a printing ink for a polypropylene material and a preparation method thereof. The printing ink for the polypropylene material is composed of a component A and a component B, wherein the ratio of the component A to the component B is 100: (1-5); the component A comprises the following components by mass percent: 40%-70% of modified polyurethane, 3%-5% of celluloses, 0%-10% of pigment, 0%-5% of polymeric dispersant and 20%-40% of solvent; and the component B is a hardener. In this way, the ink provided by the invention is good in adhesion to a polypropylene substrate and the coating formed is good in glossiness, weather fastness, wear resistance, solvent resistance and bending resistance; and the ink is low in pollution on the environment and suitable for mass production and large-area use.

Description

technical field [0001] The invention relates to the field of ink coating preparation, in particular to an ink suitable for direct printing on the surface of a polypropylene material and a preparation method thereof. Background technique [0002] Polypropylene plastic is polymerized from propylene monomer. It is a colorless, odorless and non-toxic non-polar polymer compound. It can be made into thin films and hard plastic products. It will not produce harmful gases that endanger human health and the environment, so it has gradually developed into the most important application material at present. In the printing industry, polypropylene daily-use products, packaging bags, medical equipment products, and industrial woven products are all important types of substrate materials. Polypropylene plastic is characterized by low polarity, high degree of crystallization, low surface energy, high stereoregularity, and high natural cohesion. It is printed with general ink and has poor ...

AI Technical Summary

Problems solved by technology

Requires large equipment, unsafe disposal methods, and pollutes the environment

All countries have invested a lot of human and financial resources in research in this area, but they have not completely solved the problem of poor adhesion of polypropylene materials.

Chinese patent CN101469151B discloses a screen printing ink for polypropylene plastics. In this ink, cyclized rubber and chlorinated polypropylene are used as the resin matrix, together with additives, solvents, fillers and pigments. The invention utilizes cyclized During the cyclization reaction of rubber, the linear polymer chain with unsaturated double bonds is transformed into a linear polymer chain with a special polycyclic structure. The molecular chain becomes significantly shorter and thicker, and the polarity also increases, thereby increasing the polymerization Adhesion between material and ink; but in this invention, there are many matrix components, complicated preparation, and high cost

Chinese patent CN10220512A discloses a screen printing ink for polypropylene material that does not contain PAHS (polycyclic aromatic hydrocarbons). The main components of the ink are chlorinated polyolefin resin liquid and polyester resin liquid. Aromatic hydrocarbons) reduce the harm to human health, but its ink hardness is not good; Chinese patent application CN1063705A discloses a kind of adhesive composition that can be used for polypropylene film with chlorinated polypropylene, acrylic resin and rosin modified phenolic resin And the screen printing ink for polypropylene plastic screen printing on the surface of hard products. Although the ink can be used for screen printing on polypropylene plastic, the ink's scratch resistance, solvent resistance, and flex resistance are not good.

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