Connecting material for printing composite ink in polyurethane by using high-speed printer and preparation method for connecting material

Abstract

The invention discloses a connecting material for printing composite ink in polyurethane by using a high-speed printer and a preparation method for the connecting material. The connecting material consists of 65-70 percent of organic solvent and 30-35 percent of solid content, wherein the solid content comprises polyester polyol, isocyanate and micromolecule chain extender. The connecting material prepared by the method is high in composite strength and the peeling strength of white ink can be 5-7N / 15mm; and the peeling strength of single color ink can be 3-5N / 15mm; the connecting material can be excellently compatible with vinyl chloride, NC and other dispersion resins; the connecting material is high in attachment fastness on a PET film and an NY film, so that the connecting material cannot be pulled off by a 3M adhesive tape or the adhesive falls off the adhesive tape is avoided; with excellent pyrolysis resistance and hydrolysis resistance, the connecting material can be applied to high-grade polyurethane ink capable of resisting the boiling of water being 100 DEG C and boiling at high temperature of 121DEG C; and the connecting material has the characteristics of thermal adhesion resistance, freeness of after tack of a dry film and the like.

Description

technical field

[0001] The invention relates to a binder for environment-friendly polyurethane inner printing ink used in food packaging, in particular to a binder for printing on PET and nylon films using a high-speed printing machine, especially relates to a binder for plastic gravure printing ink and a preparation method thereof. Background technique

[0002] In recent years, with the rapid development of the flexible packaging industry, more and more printing companies have shifted from low-speed printing to high-speed printing, thus promoting the transformation of the ink industry. The key to the quality of printing ink lies in the physical and chemical properties of the selected ink binder. For ordinary low-speed printing polyurethane ink binders, as long as they have good adhesion fastness, strong solubility, good shallow web transfer and high composite strength, the requirements can be basically met. For high-performance high-speed printing polyurethane composite in...

Examples

Embodiment 1

[0016] The polyurethane ink binder provided in this embodiment contains ethyl acetate, n-propyl acetate, isopropanol, polyester polyol, IPDI, hexamethylenediamine and isophoronediamine, and the parts by weight of each component are respectively 45 parts of ethyl acetate, 7 parts of n-propyl acetate, 18 parts of isopropanol, 22.7 parts of polyester polyol, 5.1 parts of IPDI, 0.9 parts of hexamethylenediamine and 1.3 parts of isophoronediamine. The preparation method of the polyurethane ink binder provided in the present embodiment 1 adopts the following steps:

[0017] 1) Synthesis of polyester polyols. The raw materials used and the consumption amount are as follows: adipic acid, 32 parts by weight; isophthalic acid, 8.4 parts by weight; lauric acid, 18.2 parts by weight; 1.2 propylene glycol, 10.5 parts by weight; 1.4 butanediol, 16.5 parts by weight ; Neopentyl glycol, 14.4 parts by weight;

[0018] a. Esterification, the operation steps are as follows:

[0019] Add raw m...

Embodiment 2

[0036] The difference between the present embodiment and embodiment 1 is that the high-speed printing machine of the present invention uses polyurethane to print the connecting material used for different inks. It is composed of organic solvents and solids with a total weight of 100 kilograms, and the total weight of the organic solvent is 65 kilograms. , 35 kilograms of total weight of solid content; Described solid content comprises polyester polyol, isocyanate and small molecule chain extender, and the weight of described polyester polyol is 72% of the total weight of solid content, isocyanate weight It is 18% of the weight of the solid content, and the weight of the small molecule chain extender is 10% of the weight of the solid content.

Embodiment 3

[0037]The difference between embodiment 3 and embodiment 1 is that the high-speed printing machine of the present invention uses polyurethane to print the connecting material used for different inks. It is composed of organic solvents and solids with a total weight of 100 kilograms, and the total weight of the organic solvent is 70 kilograms. , 30 kilograms of total weight of solid content; Described solid content comprises polyester polyol, isocyanate and small molecule chain extender, and the weight of described polyester polyol is 85% of the total weight of solid content, isocyanate weight 10% of the weight of the solid content, and the weight of the small molecule chain extender is 5% of the weight of the solid content.

technical field

[0001] The invention relates to a binder for environment-friendly polyurethane inner printing ink used in food packaging, in particular to a binder for printing on PET and nylon films using a high-speed printing machine, especially relates to a binder for plastic gravure printing ink and a preparation method thereof. Background technique

[0002] In recent years, with the rapid development of the flexible packaging industry, more and more printing companies have shifted from low-speed printing to high-speed printing, thus promoting the transformation of the ink industry. The key to the quality of printing ink lies in the physical and chemical properties of the selected ink binder. For ordinary low-speed printing polyurethane ink binders, as long as they have good adhesion fastness, strong solubility, good shallow web transfer and high composite strength, the requirements can be basically met. For high-performance high-speed printing polyurethane composite in...

Examples

Embodiment 1

[0016] The polyurethane ink binder provided in this embodiment contains ethyl acetate, n-propyl acetate, isopropanol, polyester polyol, IPDI, hexamethylenediamine and isophoronediamine, and the parts by weight of each component are respectively 45 parts of ethyl acetate, 7 parts of n-propyl acetate, 18 parts of isopropanol, 22.7 parts of polyester polyol, 5.1 parts of IPDI, 0.9 parts of hexamethylenediamine and 1.3 parts of isophoronediamine. The preparation method of the polyurethane ink binder provided in the present embodiment 1 adopts the following steps:

[0017] 1) Synthesis of polyester polyols. The raw materials used and the consumption amount are as follows: adipic acid, 32 parts by weight; isophthalic acid, 8.4 parts by weight; lauric acid, 18.2 parts by weight; 1.2 propylene glycol, 10.5 parts by weight; 1.4 butanediol, 16.5 parts by weight ; Neopentyl glycol, 14.4 parts by weight;

[0018] a. Esterification, the operation steps are as follows:

[0019] Add raw m...

Embodiment 2

[0036] The difference between the present embodiment and embodiment 1 is that the high-speed printing machine of the present invention uses polyurethane to print the connecting material used for different inks. It is composed of organic solvents and solids with a total weight of 100 kilograms, and the total weight of the organic solvent is 65 kilograms. , 35 kilograms of total weight of solid content; Described solid content comprises polyester polyol, isocyanate and small molecule chain extender, and the weight of described polyester polyol is 72% of the total weight of solid content, isocyanate weight It is 18% of the weight of the solid content, and the weight of the small molecule chain extender is 10% of the weight of the solid content.

Embodiment 3

[0037]The difference between embodiment 3 and embodiment 1 is that the high-speed printing machine of the present invention uses polyurethane to print the connecting material used for different inks. It is composed of organic solvents and solids with a total weight of 100 kilograms, and the total weight of the organic solvent is 70 kilograms. , 30 kilograms of total weight of solid content; Described solid content comprises polyester polyol, isocyanate and small molecule chain extender, and the weight of described polyester polyol is 85% of the total weight of solid content, isocyanate weight 10% of the weight of the solid content, and the weight of the small molecule chain extender is 5% of the weight of the solid content.

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