Which is better for food packaging, solvent-free lamination or dry lamination?

Solvent-free laminating and dry laminating are two common laminating processes in food packaging, they have their own advantages and applicable scenarios, the following will analyze and compare the characteristics and applicability of these two processes, in order to better select the appropriate packaging.

1. solvent-free lamination:

Solvent-free composite process is the film of different materials through the compression or adhesive way for composite, without the use of organic solvents. The advantages of this type of lamination are:

(1) Environmental protection: solvent-free laminating will not produce the environmental pollution caused by the volatilization of organic solvents.

(2) Food safety: solvent-free laminating does not release organic solvent residues, so the risk of contamination of food is lower.

(3) Higher heat resistance: the packaging material after solvent-free laminating can better withstand high temperature conditions and is suitable for packaging of high temperature food.

(4) Good packaging effect: the surface of packaging film after solvent-free lamination is flat, with good gloss and transparency.

2. Dry lamination:

Dry laminating process is by fusing and bonding the films of different materials at high temperature without the use of solvents. The advantages of dry lamination are:

(1) Better temperature resistance: the packaging material after dry lamination can withstand higher temperature, which is suitable for packaging of high temperature heated or baked food.

(2) Fine laminating: Dry laminating can realize finer laminating control, stronger adhesion between the layers of laminating film and not easy to fall off.

(3) High production efficiency: Dry laminating process is relatively fast and suitable for mass production.

Comprehensive comparison:

For food packaging, solvent-free laminating is more suitable for packaging foods with higher requirements, such as foods that are easy to oxidize, high-temperature foods and foods with long shelf life. This is because the packaging material after solvent-free lamination has better heat resistance and is not easy to produce organic solvent residues. At the same time, solvent-free lamination is environmentally friendly and meets the requirements of food safety.

Dry laminating is more suitable for food packaging that requires high adhesion of the composite layer, such as easy peeling packaging or high temperature baking food packaging. The packaging material after dry lamination has stronger adhesion and is not easy to fall off, while dry lamination has higher requirements for production efficiency and is suitable for mass production.

In summary, solvent-free laminating and dry laminating have their own application scenarios, which process to choose according to the specific food packaging needs to decide.