Mold-Masters is an industry leader 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.

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. (20 L) pails. Each of these 700g pails incorporated 50% PCR as the core layer. This sustainable solution has the potential to generate significant savings for the molder (based on current prices) by reducing the use of virgin material and TiO₂ (compared to traditional mono-layer pails). These significant savings and favorable ROI mean that sustainability initiatives can also make good financial sense.

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 percentage of PCR content than competitive systems. Where Mold-Masters can inject up to 50% PCR core, many competing systems are limited to incorporating up to 35% which could limit 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 A picture containing text

Description automatically generatedcore 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.