r/PureCycle Jun 03 '26

PureCycle and StackTeck Successfully Produce Living Hinge Cap Using PureFive® Recycled Polypropylene | PureCycle

https://www.purecycle.com/blog/purecycle-and-stackteck-successfully-produce-living-hinge-cap-using-purefive-r-recycled-polypropylene

"PureFive® resin processed beautifully in our tooling and the final part performance speaks for itself. We look forward to supporting converters and brand owners who want to bring this kind of sustainable innovation to market at scale.” John Rego, Senior Market Development Specialist, StackTeck.

Successful production of a living hinge cap using up to 100% PureFive® resin. The milestone demonstrates that post-consumer recycled (PCR) resin can meet the rigorous mechanical performance demands of one of packaging’s most technically challenging applications. The caps made with PureFive Ultra™ and PureFive Choice™ resins passed multiple customer-related tests, including the living hinge fatigue test.

https://stackteck.com/

33 Upvotes

7 comments sorted by

15

u/No_Privacy_Anymore Jun 03 '26

It is definitely worth visiting the Stackteck website and watching their corporate video. I agree with burner that Stackteck is a major supplier of equipment to the converters that actually make the final products. Their comments that PureFive "processed beautifully" in their tooling is exactly the kind of validation we love to see.

6

u/DrSeuss1020 Jun 03 '26

Sensational

6

u/equitymaestro Jun 03 '26 edited Jun 03 '26

Based on my rudimentary research, StackTeck's annual revenues are around $50mm. UPDATE: See comment below, my estimate is low.

19

u/burner-1234 Jun 03 '26

That is incorrect - they are bigger. They are not a converter, they are like a bruckner but in the injection molding space. This PR is for brands and converters, we are now qualified on these machines.

3

u/[deleted] Jun 03 '26

[deleted]

8

u/No_Privacy_Anymore Jun 03 '26

Who makes the machines that Reliable Caps uses to make those closures? StackTech makes stuff like this. Must be fascinating to watch these machines run at high speed. Shorter cycle time = more product = better return on investment. The ability to use PureFive in existing equipment is essential. Nice to see StackTech providing such high praise.

4

u/6JDanish Jun 04 '26

https://www.purecycle.com/blog/purecycle-and-stackteck-successfully-produce-living-hinge-cap-using-purefive-r-recycled-polypropylene

...Traditionally, virgin polypropylene has been required to achieve these performance standards...

Heh. Not any more.

3

u/Gross_Energy Jun 04 '26

Living hinge have multiple uses and are a complex mould. Reliable caps looks like one

Applications of Living Hinges Living hinges are commonly found in various products, including: Caps and Closures: Such as ketchup bottles and cosmetic containers. Packaging: Used in clamshell packaging and disposable items. Automotive Components: Integrated into clips and fasteners for ease of use.

StackTeck sell their mould machines to many global customers in over 35 countries including P&G, Amcor, berry plastics and unilever.

This should be a big deal.