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Dip Molding

and Coating

Materials

Dip Molding and Coating Materials Continue to grow.
It would be difficult to make a conclusive list of moldable materials due to the fact that they are ever increasing. Although liquid PVC (plastisol) is still the most common material, it is now possible to use the same equipment, with a modified process, to process natural latex rubber, nitrile, neoprene, polyurethane, plastisol (PVC), butyl latex, silicone and other liquids. The list is furthur expanded to Nylon, Polyethelene, PTFE, and even thermoset polymers using the fluid bed process.

With our multidip equipment, other possibilities such as co-molding two different materials are possible.

We are glad to assist you in experimental applications to determine which material would be the best choice for your application.

 

Dip Molding Defined




Plastisol
This thermoplastic (PVC) heads the list of dip moldable materials because of it's long history of success, ease of processing, affordability, and prevelence in the dip molding industry.
Plastisol is liquid at room temperature and once exposed to a certain elevated temperature, gels and remains a solid.
This polymer can range in hardness from 33 (softest) to 96 (hardest) Shore A scale durometer and offer temperature resistance from -20 degF to 160 degF.

Silicon and Polyurethane
Although silicon and urethane is very expensive compared to more conventional materials, it may be the new "latex" material soon. Check out a recent article from Medical Device and Diagnostics Industry magazine to learn more. Silicon offers superior temperature resistance.

Test Polyurethane Silicone Latex
Tensile (psi) 3000–5500 800–1500 4400–4900
Elongation(%) 400–1000 600–1100 800–1200+
Tear strength (pli) 330–380 100–280 340–370
S tear (pli) 150–250 50–100 100–190
Tensile set @ 300% 2–10% 1–5% None
UV resistance Good Good Poor
Chemical resistance Good Good Poor
Bondability Good Moderate Poor
Allergic reaction No No Yes

Chart from MD&DI magazine article


Fluid Bed Powder Coating

There was a time when wet-painting was used for everything from ashtrays to automobile frames, and a solvent-based liquid coating was the only game in town. Plating emerged as a surfacing option as well, but times have changed. Federal, state and local regulations, plus cost-prohibitive disposal factors, are all contributing to the rapid obsolescence of wet sprays and plating. As these methods make their exit, powder coating has stepped up as the high-quality, cost-effective solution for all of your decorative and functional finishing needs.

A small sample of the products that can be powder coated:

  • lawn and garden equipment
  • marine products
  • office furniture
  • business machine hardware
  • auto parts
  • auto aftermarket
  • sports equipment
  • orthopedic equipment
  • medical supplies
  • electronic components
  • die cast parts
  • sheet metal products
  • aviation parts
  • scuba equipment
  • aerospace components