Polypropylene Injection Molding

Polypropylene Plastic Products Manufacturer: Retlaw Industries

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.

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What is Polypropylene Molding Material?

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.

Molding Benefits of Polypropylene

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:

Plastic Water Bottle Manufacturing

  • Moderate strength and stability: A strong plastic that holds up against general wear and tear.
  • Flexibility: Can be molded into a variety of shapes, making it useful for plastic injection molding.
  • Heat Insulating: Can retain heat, making it useful for warm or hot food storage.
  • Chemical resistant: Doesn’t warp or disintegrate when in contact with certain chemicals.
  • High impact strength: Doesn’t break under impact or high pressure.
  • Low friction: Polypropylene is an ideal plastic when working with high heat and friction.
  • Moisture resistance: Completely waterproof.

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.

Properties of Polypropylene (PP) at Room Temperature

Chemical Formula (C3H6)n
Melting Point (°C) ~130°C
Tensile Strength ~4700 psi
Impact Strength ~0.7 ft-lb/in notched Izod 
Hardness Level (Rockwell) R92
Flexural Modulus ~6000 psi 

Common Applications of Polypropylene Injection Molding

Polypropylene products are some of the most versatile, with applications in nearly every plastic end-use market.

Plastic Containers

PP Plastic for Containers

Reusable Water Bottles

PP Plastic for Reusable Water Bottles

Medical Components

PP Plastic for Medical Components

Outdoor Furniture

PP Plastic for Outdoor Furniture

Toys & Novelties

PP Plastic for Toys


PP Plastic for Luggage 

Get Custom Polypropylene Plastic Parts

Why Choose Retlaw for Polypropylene Injection Molding?

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 also produces roller chain sprockets, which are commonly made from polypropylene.

Plastic Injection Molding Services

  • Design & Engineering: Precision design and engineering for durable polypropylene products.
  • Tooling: Efficient polypropylene mold creation for quality output.
  • Molding: Reliable polypropylene molding for consistent product quality.
  • Assembly: Streamlined assembly of polypropylene components.
  • Prototyping: Fast polypropylene prototyping for design efficiency.

Creating Injection Molded Parts in Over 10 Industries

Supplying Custom Plastic Parts to Companies Nationwide

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!

Contact the polypropylene plastic manufacturers at Retlaw today to get a product quote. 
Retlaw sells in all 50 states. Let's get together and build a solution.
For over 40 years, Retlaw has produced quality injection molding tools which has led us into thermoplastic injection molding for a wide variety of industries. With over 19 injection molding machines, decades of collective experience, and over 50,000 square feet under roof and room to expand, we are always ready for your new projects.
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