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Custom Plastic Color Compounding Built for Real-World Loads

You are not looking for pellets. You are looking for relief from yellowing housings, brittle snap-fits, and parts that warp when the line is hot and the clock is ticking. Custom color compounding should alleviate those frustrations. Marval Industries is committed to addressing the challenges associated with color compounding.

We start where your headaches start, not in a catalog. The application sets the target. The stresses, the temperatures, the sterilization cycles, the color that must stay true under hard light and time. Marval builds compounds backward from those constraints so your parts run clean, hold color, and survive their environment without a fight.

Start with the Stress, Not the Resin

Projects derail when teams choose a resin first and only later admit what the part really sees outside the lab. The better path is to list the stresses the part must survive and treat those as non-negotiable. When the daily reality is clamp loads at temperature, thin ribs with knit lines, aggressive cleaners, or QUV exposure, that reality becomes our formulation brief. The result is not “close,” it is on-purpose material behavior that lets your tools do their job.

Medical Devices Live in Heat and Harsh Cleaners

Autoclaves, peroxides, and daily wipe-downs punish both polymer and pigment. We match heat-stable colorants to sterilization methods, select resins that retain their impact after multiple cycles, and utilize additive systems that protect both the base polymer and the visual target. The goal is simple. After the tenth sterilization, the geometry still snaps, and the color still reads as the brand you approved.

Electrical Housings Demand Stability and Safety

Static, heat build-up, and sunlight are a tough mix. We pair anti-stat packages with stable pigment systems, keep flow in the window for thin-wall parts, and hold mechanicals so fasteners do not chew through bosses over time. Color has to stay true on the showroom shelf and on the rooftop enclosure. The compound should help you meet both moments without re-matching every season.

Color that Holds and Performs Under Pressure

Color is not paint. It lives inside the part, tied to the polymer, the additives, and the process that made it. That is why we treat color compounding as performance work. A beautiful match that fades, blooms, or shifts after molding is not a match at all. We build pigment packages that respect heat history, shear, and UV, then prove that the shade stays on target while the part meets impact, stiffness, and flow requirements.

What you feel on the floor is fewer changeovers, fewer panic regrinds, and fewer “why did this lot run differently” conversations. What you see in the field is color that still reads as your brand after a summer and a winter.

Specialty Compounds that Carry the Load

Sometimes the part needs more backbone or a different kind of toughness. That is where specialty compounding earns its keep.

Mineral-reinforced systems: Calcium carbonate and talc can calm warpage and improve dimensional stability. We tune particle size and loading so you gain stiffness without turning gates into choke points.
Mica-modified blends: Mica platelets help with heat deflection and stability in thin sections. The trade-offs are real. We balance them so flow, finish, and screw wear stay in a range your process can live with.
Glass-filled engineering resins: When fasteners bite or parts see constant stress, glass reinforcement carries the load. Fiber length, coupling chemistry, and viscosity targets are set to protect both strength and surface.

Every choice above ties back to the same promise. The compound should feel predictable in your molds and deliver the property you paid for in the field.

Controls that Protect your Spec

Good intentions do not hold tolerances. Controls do. We treat quality as a chain that starts before a run and ends after the last box is sealed.

Before the run: Incoming materials are verified and conditioned. Masterbatches are screened on small equipment to confirm color and property direction before line time is on the clock.
During the run: Gravimetric feeding, stable thermal profiles, and screw designs tailored to the formulation maintain shear and residence within a safe range. Line checks confirm melt flow, color, and key mechanicals, so drifts get corrected while the parts you will mold are still being made.
After the run: Post-blend homogenizes the lot so you do not chase variation box to box. Final checks confirm that the compound behaves like the sample you approved, not a similar-looking cousin.

You should not have to ask why one lot ran smoothly and the next one caused you trouble. Controls exist so that question never comes up.

What it Feels Like to Work With Marval

We are a family-run team with decades of experience in color, additives, blends, and alloys. Relationships last because service is personal and the material does what we promised. The experience is intentional. You send a print and a set of constraints. We respond with a formulation, a processing window you can actually hit, and support until the part is running the way it should.

If you are tired of fighting your resin, reach out to us today. We will build a compound that treats those stresses as the spec, not the exception.