Polymar Injection Molding offers thermoplastic injection molding services for precision manufacturing applications in accordance with ISO 9001 quality management standards. These services utilize 15+ different thermoplastic resins, including traditional materials such as ABS and PVC, as well as more complex resins such as ECTFE, ETFE, PEEK, and PVDF.
Thermoplastic molding requires specialized expertise that goes well above regular manufacturing capabilities. For over forty years, Polymar has provided advanced processing techniques that meet our clients’ demands and set the industry standard. Our team understands these different guidelines, including UL-certified injection-molded parts, and applies the correct temperature profiles, injection pressures, and cooling cycles to achieve optimal part quality in high-volume production runs of complex plastic parts and components.
We pride ourselves on delivering precision injection-molded thermoplastic parts that work the first time with no callbacks, no design revisions, and no need for rework. Our specialized equipment, deep knowledge of thermoplastic injection molding services, ISO 9001 certification, and decades of experience allow us to ensure that we deliver what we promise. This guarantee is backed by the following capabilities:
The science behind thermoplastic manufacturing combines both precision and expertise. With over four decades of injection molding experience, modern molding equipment, and over a dozen different resins to work with, we’re confident our injection molding services exceed your expectations.

At Polymar, we’re more than just a “shoot-and-ship” injection molding manufacturer. Our team is invested in the success of each plastic part that leaves our facility and works collaboratively with client engineering and design teams to refine production methods that result in high-quality parts with fast turnaround times and competitive pricing. When working with our team, we assist in the following areas:
Our process follows proven ISO 9001 quality management protocols that deliver consistent results for our customers, with comprehensive documentation to ensure the first batch and the final batch of parts are identical.
Our facility processes a broad range of engineering thermoplastics, high-performance polymers, and fluoropolymers, including ABS, PC, PET, PBT, PPO, PPS, PA6, PP, POM, ECTFE, ETFE, PEEK, PVC, PVDF, and CPVC. These resins require advanced processing capabilities and can be separated into several categories:
Every project is treated individually, even those using the same thermoplastic resins, to ensure that the processing method aligns with the desired part characteristics, design, specifications, and end performance.
We don't just mold parts and ship them out to customers. For many projects, molded components require additional work such as inserts, assembly, and secondary operations that can all be handled under one roof without requiring additional service providers and logistical headaches.
Some projects require specialized approaches, and our team is capable of meeting specific production or post-molding requirements depending on the industry. For example, thermoplastic medical parts need different handling than automotive components. Even for something as challenging as plastic parts for chemical environments, our manufacturing services include fluoropolymer processing and specialty materials that few injection molding companies are willing to work with.
Polymar Injection Molding operates an extensive collection of injection molding equipment that offers anywhere from 28 to 720 tons of clamping force, offering customers the flexibility required to manufacture small precision parts, mid-sized technical components, and larger molded thermoplastic products.
With available shot capacities that range from 0.8 to 86.3 ounces and screw diameters from 18 to 92 mm, our team can easily match available injection molding equipment to the material volume, part geometry, mold design, and production requirements of your plastic parts. Our injection molding equipment includes:
We manufacture over 10,000,000 thermoplastic components annually, and nearly half a billion parts in our company history. Everything from medical devices and automotive assemblies to industrial equipment and aerospace parts. We’re confident that we possess the necessary injection molding equipment to bring your thermoplastic parts and components to market.
Here's how it works. You tell us what you need. We figure out the best approach. Materials, processing, timeline, and costs. To make it an easy and seamless process, we lay it all out clearly.
At Polymar Injection Molding, we pride ourselves on taking an individualized approach to every project that comes through our doors. We’re more than a “shoot-and-ship” company; we act as an invested partner in our clients' success and strive to learn how they operate, their challenges, how they want to solve these problems, and the end goal. From prototyping to full-scale production runs, we value every relationship and treat all situations as though they were our parts.
01What thermoplastic resins can Polymar injection mold?
We regularly process and mold 15+ different thermoplastic resins, including many that other injection molding companies can not or will not process. This includes engineering thermoplastics, high-performance polymers, and challenging fluoropolymers. We mold ABS, PC, PET, PBT, PPO, PPS, PA6, PP, POM, ECTFE, ETFE, PEEK, PVC, PVDF, and CPVC.
02What size thermoplastic parts does Polymar specialize in molding?
Our injection molding equipment ranges from 28 to 720 tons of clamping force with shot capacities from 0.8 to 86.3 ounces. This extensive molding capability allows us to take on small precision molding jobs, mid-sized technical parts, and larger molded thermoplastic components or assemblies.
03What tolerances can Polymar hold on injection-molded plastic parts?
With our combination of experience and equipment, we can hold tolerances as tight as ±0.001” on qualifying features and profiles. Actual achievable tolerances may vary based on the specific resin, part geometry, tooling, wall thickness, feature location, and overall production specifications.
04Do you offer any value-added post-molding services to reduce logistics and costs?
Yes. We offer insert molding, two-shot and multi-material molding for specialized applications. Our value-added post-molding services include overmolding, machining, sonic welding, pad printing, assembly, and even custom packaging to provide more comprehensive start-to-finish injection molding capabilities that reduce production costs and turnaround time.
05What industries does Polymar regularly work with for thermoplastic molding projects?
Given our experience, ISO certification, UL certification, and molding equipment, Polymar is an ideal partner for virtually any industry. Since 1979, we’ve specialized in thermoplastic molding for customers in the medical, automotive, construction, electrical, and industrial OEM sectors.