Fri, 10/15/2021 - 12:30


Mold-Masters currently leads the industry in sustainable application knowledge and success which extends to both Bio-Resins and Post-Consumer Recycled (PCR) materials. Sustainability is not only driven by government regulations, but consumer demand and environmental awareness around the globe is driving more companies towards sustainable applications.

Co-injection PCR (5gal Pail)

When it comes to PCR and sustainable applications, Mold-Masters has the proven capability. Utilizing our industry-leading co-injection multi-layer technology, we have the ability to combine 2 separate resins into a single 3-layer melt flow. This enables us to be able to inject high PCR content as the core layer up to 50% of total part weight without sacrificing part quality or cycle time. In our most recent production application, Mold-Masters implemented a 2-cavity Co-injection system for producing 5-gal (20L) pails. Each of these pails incorporated 50% PCR as the core layer. This sustainability initiative could potentially generate about $1M in annual resin savings (based on current prices) for the molder and reduced usage of TiO₂ (compared to traditional mono-layer pails). The pail of this application had a total weight of 700g. The significant savings in resin costs means that sustainability initiatives can also make financial sense from a business perspective. It only makes sense for companies to be able to maximize their ROI.

Mold-Masters first introduced this capability as part of our advanced industry-leading co-injection technology back in 2015. What sets Mold-Masters apart is our leading-edge control, which allows us to precisely control distribution and thickness of the core layer. This is what allows Mold-Masters to inject a higher % of PCR content than competitive systems. Where Mold-Masters can inject up to 50% of core, competitors are limited to about 35% which limits sustainability targets and can significantly affect implementation ROI. Uniform leading-edge control allows Mold-Masters to achieve more consistent and fuller core fill. Mold-Masters patented “fold-over” capabilities is a technical advantage that enables us to achieve the highest core percentage and allows us to ensure uniform distribution and complete coverage of PCR resins (prevents contact of PCR with product).

Another significant difference is our ability to position the core where we want it. For example, on packaging applications customers may prefer to keep any PCR core away from the injection point to avoid molded in stresses which can cause brittleness and result in drop test failures.

One of the major advantages of Mold-Masters Co-injection technology is that there is no penalty to cycle time and existing tooling can be re-used. A variety of materials can be combined although those with similar melt temperatures are ideal for compatibility. Many applications are those that utilize the same material (ex: 50% virgin HDPE, 50% PCR HDPE). However, our thermally isolated manifolds make it possible to combine two thermally different resins.

About Mold-Masters

Mold-Masters is a leading global supplier of hot runners, controllers, auxiliary injection and co-injection systems. We design, manufacture, distribute, sell and service highly engineered and customized plastic processing equipment that caters to every market. Mold-Masters is credited for patenting the first commercially viable hot runner system in 1965. Today, Mold-Masters conducts business in over 100 countries and employs a diverse workforce that exceeds 2,150 professionals. Mold-Masters Global Headquarters is located in Georgetown, ON Canada.

Media Relations
Miki Bogar – Sr. Manager, Global Marketing
905-877-0185 ext. 721