Coated paper and production method thereof

Abstract

The invention provides a coated paper and a production method thereof and relates to the technical field of packaging materials. The coated paper comprises a base paper and a coating film layer. The coating film layer coats the surface of the base paper. The coating film layer is prepared from a polypropylene material through coating and thus the coated paper has the advantages of good transparency, small shrinkage, low heat sealing temperature, high bonding strength, beautiful appearance, good waterproof performances, high strength, microwave heating and low cost.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a high-temperature-resistant coated paper and a production process thereof. Background technique [0002] Currently used packaging paper is generally provided with a coating layer on either side of the cardboard or on both sides of the plane, and then processed into a paper container with a preset shape for holding hot water or ice water or hot food or dry food. Products, etc., the existing products all use traditional PE coating film or PE material. [0003] The applicant found that the existing products have at least the following technical problems: 1. Poor permeability. When the coated paper material formed by PE coating film is used for oil-water penetration test, different degrees of permeation areas will appear at the joints. 2. The strength and toughness are poor. The existing products are the main production materials of instant noodle paper bowls. Instant n...

AI Technical Summary

Problems solved by technology

[0003] The applicant found that the existing products have at least the following technical problems: 1. Poor permeability. When the coated paper material formed by PE coating film is used for oil-water penetration test, different degrees of permeation areas will appear at the joints. 2. The strength and toughness are poor. The existing products are the main production materials of instant noodle paper bowls. Instant noodles are generally fried food and equipped with oil packets. The corners of individual noodle blocks are affected by external forces. It is easy to pierce the PE layer, and the oil stain will penetrate to the outer surface when brewing instant noodles, making the product unsightly and posing a safety hazard

3. The composite fastness is poor, and it is prone to peeling or delamination. After the product with a cover is uncapped, the cover film and the PE film of the product body paper are easy to be torn off together, destroying the beauty of the product and the safety of use. ;4. The instant noodle paper bowl made of PE-coated film-coated paper usually prompts "do not microwave" in the font of the appearance printing part, which is extremely inconvenient to use.

5. The coating layer of the existing material is milky white and opaque, and the printing appearance is affected; 6. In terms of the coating film process, the melting flow rate and coating speed of the existing PE material are slow, and the production efficiency is low

In addition, the production cost of products made of PE coated film is relatively high

Images