PET heat-sealing film coating antifogging agent, PET antifogging easy-to-uncover film and preparation method and application thereof

Abstract

The invention provides a PET heat-sealing film coating antifogging agent, a PET antifogging easy-to-uncover film and a preparation method and application thereof. The antifogging agent comprises the following components in percentage by mass: 8-11% of acrylic acid grafted modified polyester polyol; 2-4 % of hexamethylene diisocyanate; 3-5% of acetone; 3-4% of dimethylolpropionic acid; 1.5-3.5% of 3-allyloxy-2-hydroxy-1-sodium propanesulfonate salt; 1.1-2.2% of maleic anhydride; 2.5%-3.5% of isopropyl alcohol; 2.0-3.5 % of ethylene glycol; 0.1-1.0 % of an initiator; 0.2%-1.2% of a catalyst; 0.3%-0.5% of a defoaming agent; 1.5-2.5 % of palm wax anti-sticking agent; 0.5%-1.0% of a SiO2 anti-sticking agent; and 60-70% of soft water. The antifogging agent adopting the components has a good antifogging effect, and also has good heat sealing strength with a PET box body, so that the effect of easy uncovering is achieved; and the environment-friendly requirement is met.

Description

technical field [0001] The invention belongs to the technical field of food box packaging, and in particular relates to a PET heat-sealing film coated with an antifogging agent, a PET antifogging easy-to-remove film, a preparation method and application thereof. Background technique [0002] At present, the high-quality packaging boxes used in fresh food packaging on the market require high transparency, easy-to-open lid, cold and hot anti-fog functions, etc. Therefore, PET film is used to heat seal PET transparent boxes. However, since PET light film and PET box are not easy to be heat-sealed and bonded, and after bonding, they need to have hot and cold anti-fog functions, which has caused many technical obstacles to product development and application. [0003] The domestic traditional food box packaging sealing for fresh food is achieved by coating or compounding the film surface and then heat sealing with the PET box. However, this laminating method has the following di...

AI Technical Summary

Problems solved by technology

However, this laminating method has the following disadvantages: 1) It is difficult to remove the film. Because the thickness of the laminating film is thicker, generally 20-70 μm, and the thickness is uneven, it is easy to cause the heat seal to be too large during use, which is not easy to open, and the thickness of the laminating film Unevenness leads to large fluctuations in heat-sealing strength, and it is easy to tear the cover film; 2) The base material of the laminating film is paper, which is relatively poor in transparency or completely opaque; 3) The same material that does not meet environmental protection requirements, because the general The boxes used to hold fresh fruits are all made of PET

However, the base material used for the coating is paper and the material of the coating is PP and the composite film is PE or CPP, which does not meet the requirements of environmental protection and unified material recycling.

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