How to Avoid Odor Generation During Injection Molding

2025,12,19

Many injection molded products produce unpleasant odors during processing, which can be uncomfortable for users. So how can this be avoided during the injection molding process? Jinan Tongkang Mold Factory is here to help.

1. Strictly Control the Use of Additives

Tertiary amine catalysts used in the production of polyurethane foam often lead to a very strong odor. Instead of using conventional polyols, which can cause moisture in car windows, we can use polyols whose composition not only forms the polyurethane molecular chain but also possesses catalytic activity. Some polyols can even replace half of the tertiary amine catalyst, thus eliminating the odor in the injection molded product.

Injection Molding Service Plastic Enclosure

2. Use More Pure Resins

Many plastics, especially polyvinyl chloride, styrene, ethyl acetate, acrylates, and other residual trace monomers, produce odors. Minimizing monomer residue can help eliminate odors; the best option is to use odorless resins.

3. Pay Attention to the Use of Adsorbents

Adding a small amount of zeolite to the polymer can remove odors. Zeolite crystals have many pores that can trap small molecules like gases.

Author:

Mr. Kama Liu

E-mail:

sale@hwplasticparts.com

Phone/WhatsApp:

+86 15069372818