How to improve the carbon dioxide barrier of plastic granules?- Zhejiang Houmi Import and Export Corporation

How to improve the carbon dioxide barrier of plastic granules?

Improving the carbon dioxide (CO2) barrier properties of plastic granules involves selecting the right plastic materials and incorporating additives or creating multilayer structures to enhance their CO2 resistance. Here are several strategies to improve the CO2 barrier of plastic materials:

Choose Barrier Plastics:

Select plastic materials that inherently possess good CO2 barrier properties. Ethylene vinyl alcohol (EVOH) is one of the most effective barrier plastics for CO2. It is commonly used in multilayer packaging structures to enhance CO2 resistance.

Blend with EVOH:

Blend plastics like polyethylene (PE) or polypropylene (PP) with EVOH to improve CO2 barrier properties. EVOH is a high-performance CO2 barrier material and can be added in various proportions to the plastic granules.

Multilayer Structures:

Create multilayer packaging structures with alternating layers of plastics and barrier materials. For example, you can sandwich a layer of EVOH between layers of PE or PP to create an effective CO2 barrier. This multilayer approach can significantly enhance CO2 resistance.

PP EP2641 USE FOR Auto parts, toys, thin-walled food containers, household items

PP EP2641 USE FOR Auto parts, toys, thin-walled food containers, household items

Barrier Coatings:

Apply CO2 barrier coatings to the surface of plastic materials. These coatings can be made from materials like aluminum oxide or silicon oxide. They create a barrier by slowing down the diffusion of CO2 through the plastic.

Gas Scavengers:

Incorporate gas scavenger additives into the plastic formulation. These additives can react with and neutralize CO2 that penetrates the plastic, helping to maintain a controlled atmosphere within the package.

Sealing Techniques:

Pay careful attention to sealing techniques when using plastic materials for CO2-sensitive products. Proper sealing ensures that the package remains airtight, preventing CO2 ingress or egress.

Barrier Films:

Use barrier films made of plastic materials specifically designed for CO2 resistance. These films often combine multiple layers, including barrier layers, to achieve effective CO2 protection.

Thickness and Packaging Design:

Increase the thickness of plastic films or use packaging designs that include multiple layers to create a thicker barrier. Thicker films generally provide better CO2 resistance.

Testing and Quality Control:

Perform CO2 permeation testing and quality control to ensure that the plastic packaging meets the required CO2 barrier specifications for the intended application.

Moisture Control:

Moisture can affect CO2 barrier properties. Ensure that the plastic materials are properly dried and that the packaging environment is controlled to minimize the presence of moisture, which can increase CO2 permeability.