Low-shrinkage composite PE laminating material and preparation method thereof

Abstract

The invention provides a low-shrinkage composite PE laminating material and a preparation method thereof, and relates to the technical field, and the low-shrinkage composite PE laminating material isprepared from the following raw materials: low density polyethylene, modified polylactic acid, poly(1, 2-propylene glycol adipate), modified nano cellulose, polyacrylamide and an antioxidant. The low-shrinkage composite PE laminating material disclosed by the invention has relatively high tensile strength, elongation at break and tearing strength. Compared with the prior art, the non-toxic biomassdegradable material has high heat stability and barrier property, has a wide application prospect, repeatedly screens the dosage of each raw material, enables the raw materials to be suitable for melt strength and melt flowability required by casting film formation, and also improves the adhesiveness of a coating film and substrate paper. The raw materials have the advantages of the high boilingpoint, low volatility, good environmental sanitation, high viscosity, no toxicity and biodegradability.

Description

technical field

[0001] The invention relates to the technical field of new polymer materials, and relates to a low-shrinkage composite PE coating material and a preparation method thereof. Background technique

[0002] Coating of paper cups, paper bowls, etc. is to coat plastic particles on the surface of paper through a casting machine. It is a layer of non-toxic and harmless PE (polyethylene) material on the surface of the paper and then pressed to make the paper oil-proof, Waterproof (relative), airtight, and has a good moisture-proof effect. The paper is then pressed into paper cups and paper bowls by cup-making or bowl-making equipment. The disposable paper cups commonly used in daily life are made of coated paper. In the production process of coated paper, the plastic particles are plasticized by the screw and then extruded linearly from the die of the flat die. After stretching, they are attached to the surface of the paper, cooled and shaped, and pressed to form coat...

Examples

Embodiment 1

[0025] The low-shrinkage composite PE coating material in this example is made of the following raw materials in parts by weight: 20 parts of low-density polyethylene, 10 parts of modified polylactic acid, 1 part of poly-1,2-propylene glycol adipate, modified nanofiber 5 parts of prime, 2 parts of polyacrylamide, 0.5 parts of antioxidant, 0.3 parts of lubricant;

[0026] Among them, the modification method of polylactic acid is: add 10 parts of dry polylactic acid from the feed port of the twin-screw extruder, and at the same time, add 0.1 part of polyethylene glycol and 0.2 part of dibutyl sebacate from the liquid of the extruder Adding from the feed port, melt extrusion, water cooling, pelletizing, and drying to obtain modified polylactic acid; modified nanocellulose is obtained by grafting and modifying nanocellulose fibrils with octadecyltrichlorosilane , the mass ratio of octadecyltrichlorosilane and nanocellulose fibrils is 0.5:10;

[0027] Low-density polyethylene has ...

Embodiment 2

[0033] The low-shrinkage composite PE coating material in this example is made of the following raw materials in parts by weight: 33 parts of low-density polyethylene, 16 parts of modified polylactic acid, 2 parts of poly-1,2-propylene glycol adipate, modified nanofiber 13 parts of prime, 5 parts of polyacrylamide, 1 part of antioxidant, 1 part of lubricant;

[0034] Among them, the modification method of polylactic acid is: add 10 parts of dry polylactic acid from the feed port of the twin-screw extruder, and at the same time, add 0.1 part of polyethylene glycol and 0.2 part of dibutyl sebacate from the liquid of the extruder Adding from the feed port, melt extrusion, water cooling, pelletizing, and drying to obtain modified polylactic acid; modified nanocellulose is obtained by grafting and modifying nanocellulose fibrils with octadecyltrichlorosilane , the mass ratio of octadecyltrichlorosilane and nanocellulose fibrils is 0.5:10;

[0035] Low-density polyethylene has a me...

Embodiment 3

[0041] The low-shrinkage composite PE coating material in this example is made of the following raw materials in parts by weight: 27 parts of low-density polyethylene, 13 parts of modified polylactic acid, 1.5 parts of poly-1,2-propylene glycol adipate, modified nanofiber 9 parts of prime, 3.5 parts of polyacrylamide, 0.7 parts of antioxidant, 0.6 parts of lubricant;

[0042] Among them, the modification method of polylactic acid is: add 10 parts of dry polylactic acid from the feed port of the twin-screw extruder, and at the same time, add 0.1 part of polyethylene glycol and 0.2 part of dibutyl sebacate from the liquid of the extruder Adding from the feed port, melt extrusion, water cooling, pelletizing, and drying to obtain modified polylactic acid; modified nanocellulose is obtained by grafting and modifying nanocellulose fibrils with octadecyltrichlorosilane , the mass ratio of octadecyltrichlorosilane and nanocellulose fibrils is 0.5:10;

[0043] Low-density polyethylene h...

technical field

[0001] The invention relates to the technical field of new polymer materials, and relates to a low-shrinkage composite PE coating material and a preparation method thereof. Background technique

[0002] Coating of paper cups, paper bowls, etc. is to coat plastic particles on the surface of paper through a casting machine. It is a layer of non-toxic and harmless PE (polyethylene) material on the surface of the paper and then pressed to make the paper oil-proof, Waterproof (relative), airtight, and has a good moisture-proof effect. The paper is then pressed into paper cups and paper bowls by cup-making or bowl-making equipment. The disposable paper cups commonly used in daily life are made of coated paper. In the production process of coated paper, the plastic particles are plasticized by the screw and then extruded linearly from the die of the flat die. After stretching, they are attached to the surface of the paper, cooled and shaped, and pressed to form coat...

Examples

Embodiment 1

[0025] The low-shrinkage composite PE coating material in this example is made of the following raw materials in parts by weight: 20 parts of low-density polyethylene, 10 parts of modified polylactic acid, 1 part of poly-1,2-propylene glycol adipate, modified nanofiber 5 parts of prime, 2 parts of polyacrylamide, 0.5 parts of antioxidant, 0.3 parts of lubricant;

[0026] Among them, the modification method of polylactic acid is: add 10 parts of dry polylactic acid from the feed port of the twin-screw extruder, and at the same time, add 0.1 part of polyethylene glycol and 0.2 part of dibutyl sebacate from the liquid of the extruder Adding from the feed port, melt extrusion, water cooling, pelletizing, and drying to obtain modified polylactic acid; modified nanocellulose is obtained by grafting and modifying nanocellulose fibrils with octadecyltrichlorosilane , the mass ratio of octadecyltrichlorosilane and nanocellulose fibrils is 0.5:10;

[0027] Low-density polyethylene has ...

Embodiment 2

[0033] The low-shrinkage composite PE coating material in this example is made of the following raw materials in parts by weight: 33 parts of low-density polyethylene, 16 parts of modified polylactic acid, 2 parts of poly-1,2-propylene glycol adipate, modified nanofiber 13 parts of prime, 5 parts of polyacrylamide, 1 part of antioxidant, 1 part of lubricant;

[0034] Among them, the modification method of polylactic acid is: add 10 parts of dry polylactic acid from the feed port of the twin-screw extruder, and at the same time, add 0.1 part of polyethylene glycol and 0.2 part of dibutyl sebacate from the liquid of the extruder Adding from the feed port, melt extrusion, water cooling, pelletizing, and drying to obtain modified polylactic acid; modified nanocellulose is obtained by grafting and modifying nanocellulose fibrils with octadecyltrichlorosilane , the mass ratio of octadecyltrichlorosilane and nanocellulose fibrils is 0.5:10;

[0035] Low-density polyethylene has a me...

Embodiment 3

[0041] The low-shrinkage composite PE coating material in this example is made of the following raw materials in parts by weight: 27 parts of low-density polyethylene, 13 parts of modified polylactic acid, 1.5 parts of poly-1,2-propylene glycol adipate, modified nanofiber 9 parts of prime, 3.5 parts of polyacrylamide, 0.7 parts of antioxidant, 0.6 parts of lubricant;

[0042] Among them, the modification method of polylactic acid is: add 10 parts of dry polylactic acid from the feed port of the twin-screw extruder, and at the same time, add 0.1 part of polyethylene glycol and 0.2 part of dibutyl sebacate from the liquid of the extruder Adding from the feed port, melt extrusion, water cooling, pelletizing, and drying to obtain modified polylactic acid; modified nanocellulose is obtained by grafting and modifying nanocellulose fibrils with octadecyltrichlorosilane , the mass ratio of octadecyltrichlorosilane and nanocellulose fibrils is 0.5:10;

[0043] Low-density polyethylene h...

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