Nitrogen (N):

Extrusion Processes:

Nitrogen is commonly used during plastic extrusion. Polymers are forced through a die to create long forms like pipes. Nitrogen displaces oxygen, reducing oxidation and maintaining the health of molding dies and machinery.

Injection Molding:

In injection molding, where the polymer is injected into a mold, an oxygen-free chamber ensures the integrity of the molded part and minimizes oxidation. Nitrogen is an ideal choice for this application.

Gas Assist Injection Molding (GAIM):

GAIM is used for forming large, complex products that need to maintain integrity over longer distances. Nitrogen aids in creating tight tolerances and correctly finished parts by forcing the polymer into critical corners of the mold.

Carbon Dioxide (CO2):

Cooling and Solidification:

CO2 is used to cool and solidify plastic products during the molding process. It helps maintain shape and prevents warping or distortion.

Foaming Applications:

In foamed plastics, CO2 is introduced to create cellular structures, improving insulation properties and reducing material weight.

Oxygen (O):

Flame Treatment:

Oxygen is used in flame treatment processes to enhance surface adhesion. It activates the plastic surface, making it more receptive to coatings, printing, or bonding.

Hydrogen (H):

Polymerization:

Hydrogen is involved in polymerization reactions, where monomers combine to form polymers. It contributes to the creation of various plastic materials.

Helium (He):

Leak Testing:

Helium is used for leak testing plastic containers, ensuring their integrity and preventing gas or liquid leakage.