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New Milk Tubing Design Increased Sales

Rubber milk tubing with white inner lining

"We recognised that the black inner lining to our milk tubing was unappealing to our clients and wanted to develop a white lining which could be co-extruded in the manufacturing process."

Challenges Faced by ARTIS

There was a need to co-extrude and adhere both materials during the manufacturing process. 

The two materials had processing temperatures of 180oC and 90oC and were rheologically different. 

Results had to be Food and Drug Administration (FDA) and BgVV regulation compliant. 

New production tools had to be designed to support manufacture.

 

 Executive Summary

Sales of milk tubing increasing steadily as a result of the white inner lining.

Reduced cost of development through ARTIS knowledge and expertise of material properties

Total cost of the tube design, manufacturing process and factory trial £40,000

Reduced cost of production through innovative thinking.

 

Within 1 week we had completed initial trials which included the investigation of several material combinations of TPV, TPE liners with EPDM and SBR outers in multiwall co-extrusions.  The adhesion between layers was tested in each case and the TPV/EPDM combinations with the best results were selected for pre-production trials. We worked with a leading die designer to develop and design a custom extrusion cross-head die that would combine the two materials at required temperatures to produce the co-extruded tube to the required adhesion levels. To ensure complete curing of the layers the autoclave time and temperatures were investigated to ensure there was no degrading of the TPV inner lining. The proof of principal factory trial was conducted using TPV inner tube covered by an EPDM sheath using a uniquely designed cross-extrusion die.

Outcomes

The final combination was based on FDA compliant thermoplastic vulcanisate (TPV) inner with an EPDM rubber outer.

The sample was vulcanised in a steam autoclave to achieve optimum cure conditions.

End to end design and manufacturing process achieved for full rate production.

Increased barriers to butterfat.

Initial trials took only a week to find a solution and the processing solution took 4 months and went straight in to production.

   "ARTIS saved us time and money beyond our expectations. This project has demonstrated to our Board of Directors that by involving field engineers together with top specialists in rubber technology the results can be extraordinary."

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  • Summary:

     “ARTIS saved us time and money beyond our expectations. This project has demonstrated to our Board of Directors that by involving field engineers together with top specialists in rubber technology the results can be extraordinary.”

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    • Case Studies
    • Research
    • Testimonials

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