Two-shot plastic injection molding is an injection molding process used to create multilayer, multicolor, or multi-material parts in a single process. This process is also sometimes referred to as two shot injection molding, 2-shot molding, 2K, multilayer, multi-shot injection molding, or multishot molding. Multi-shot manufactured products eliminate steps in the manufacturing process while creating a more cost-effective, enhanced finished product.

The plastic professionals at Retlaw Industries manufacture high-quality and custom polypropylene plastic parts to your exact specifications. We design, mold, and engineer the finest polypropylene plastic parts for your industry. The team at our Wisconsin facility has the experience and expertise to consistently produce high-quality results with fast turnaround times for all your polypropylene thermoplastic components.

Retlaw Industries manufactures high-quality plastic parts with polypropylene plastic material, designed to your exact specifications. The plastic professionals at Retlaw Industries can design, mold, and engineer custom polypropylene plastic components for your industry, including idler pulleys, roller chain sprockets, rebar chairs, and more. Whatever you need, the experts at Retlaw can deliver.

For bonding to occur, the two parts undergoing the two-shot molding process must be chemically compatible. Fabrik consults with customers and material suppliers to ensure proper material selection for the specific application.

Polypropylene is a thermoplastic, meaning it can be easily molded into different shapes due to its semi-crystalline nature and low melt viscosity. It has a strong resistance to fatigue and chemical corrosion. It is used in the manufacturing of most types of plastic storage containers, kitchenware, water bottles, and even insulation and piping systems. Polypropylene parts benefit from:

Also called multi-shot or double-injection molding, two-shot injection molding is an over-molding process that adheres additional material—like thermoplastic elastomer (TPE)—to plastic substrates to improve the appearance, grip, handling, environmental resistance, or impact resistance of injection molded components. Two-shot injection molding is typically performed by multi-barrel injection molding machines, which add extra material shortly after forming the substrate to create strong bonds between the materials.

At Fabrik Molded Plastics, Inc., we offer custom two-shot plastic injection molding capabilities. Other service offerings include precision plastic injection molding, insert molding, CT scanning, scientific plastic injection molding, automotive lighting, tooling transfers, and custom automation services.

Retlaw Industries stands as the forefront manufacturer of polypropylene plastics in the U.S., dedicated to meeting the demands of companies across Wisconsin, Illinois, Michigan, Minnesota, Indiana, Ohio, Colorado, New York, Pennsylvania, Washing, and beyond. Explore the strength of polypropylene products from Retlaw Industries for plastics that set your business apart!

The two-shot molding process improves the final product in terms of feel, color, and functionality. There are many design opportunities to suit specific preferences. Examples of two-shot injection molded products include toothbrush handles, buttons, switches, caps and closures, and hand and power tools.

Polypropylene (PP) is a widely used plastic polymer in the injection molding industry. It began commercial use in 1957 and stands out for the ease of molding and cost-effective production. Polypropylene's versatility and economic advantages make it a competitor to more conventional molding materials.

Polypropylene is a very customizable plastic-type since it can also be combined with other materials, such as rubber, to create an even stronger co-polymer. Polypropylene is also a great plastic to make food containers with since it does not contain BPA, also known as Bisphenol A, a synthetic compound unsafe for human consumption.

Fabrik Molded Plastics, Inc. is a custom injection and insert molding provider of thermoplastic products. We use the latest molding technologies and automation equipment in our full-service offerings to ensure we compete at the global level. Because we use the latest molding technologies and a  scientific approach in our molding processes, our clients can reap the benefits of our competitive advantage. Contact us today or request a free quote to start your custom project.

The two-shot injection molding process consists of two main phases. Similar to traditional injection molding, the first phase involves injecting resin into a mold, which is then cooled to form a solid part in the shape of the mold. The second phase involves overmolding the 1st shot by transferring it to a second cavity by robot or rotating platen. The two plastic resins will form a molecular bond and, once cooled and ejected, becomes a finished multi-resin molded part.

Commonly used materials for two-shot injection molding include thermoplastics, thermoplastic elastomers, and liquid silicone rubber.