RPS-SONIC Ultrasonic Graphene Spray Coating For Automotive EPDM Weatherstrips

 RPS-SONIC Ultrasonic Graphene Spray Coating for Automotive EPDM Weatherstrips

 

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RPS-SONIC ultrasonic atomization spraying system applies uniform graphene functional coating on automotive rubber weatherstripping. Low friction, anti-abrasion, static dissipation, high material utilization, inline continuous coating solution for auto sealing manufacturers.

 

Automotive door, window and trunk weatherstrips (mostly EPDM rubber) are core sealing components that face millions of opening-closing friction cycles, UV aging, dust adhesion and static buildup. Traditional surface treatments such as silicone coating, fluorine paint and air spray graphene often suffer from uneven film, high material waste, nozzle clogging, inconsistent friction coefficient and poor long-term durability.

RPS-SONIC ultrasonic graphene atomizing spray technology provides a reliable, repeatable inline coating process specially optimized for automotive rubber sealing profiles. Different from high-pressure two-fluid spraying, our nozzle relies on piezoelectric ultrasonic vibration to gently atomize water-based graphene nanoplatelet suspension into uniform micron droplets, without destructive high shear force that breaks graphene sheet structure. The intact graphene lamellar network stays on the rubber surface after solvent evaporation, forming an ultra-thin, conformal lubricating & conductive functional layer.

 

What benefits does graphene coating bring to auto weatherstrips?

1. Low friction & anti-abrasion: Graphene's intrinsic solid lubrication property reduces stick-slip noise and NVH issues. It lowers friction coefficient and extends weatherstrip service life under repeated sliding friction.

2. Static dissipation: Continuous graphene network bleeds static charge away, greatly reducing electrostatic dust attraction on rubber surface.

3. UV & weather barrier: The stacked graphene sheets build a tortuous barrier to slow oxygen, moisture and UV penetration, improving ozone aging resistance of EPDM.

4. No heavy coating, no tacky surface: Dry thin film will not cause sticky feeling, will not contaminate glass or car paint during contact.

Recommended RPS-SONIC process parameters for automotive weatherstrip graphene spraying

 

Nozzle model: RPS-AT40 

Working frequency: 40 kHz (balanced droplet fineness & anti-clogging for graphene slurry)

Adjustable ultrasonic power: 10–100 W

Atomized droplet size: 15–40 μm

Liquid feed flow rate: 0.5–8 ml/min (water-based graphene slurry, solid content 0.5–2 wt%, viscosity ＜30 cP)

Shaping carrier air pressure: ＜0.05 MPa (very low air flow, avoid overspray and blow-off of wet film on soft rubber)

Spray height (nozzle to rubber profile): 60–120 mm

Effective spray width: 40–120 mm; multiple nozzles can be arranged side by side for wide extrusion profiles

Coating dry film thickness range: 0.5–5 μm, coating uniformity ＞95%

Material utilization: ≥90%, around 4 times higher than conventional air spray

Compatible automation: matched with servo traverse gantry or continuous extrusion production line for online inline spraying

 

Why choose RPS-SONIC ultrasonic spray instead of traditional spray?

Graphene slurry is easy to agglomerate. High-pressure air spray breaks graphene flakes, causes heavy fog overspray, wastes expensive graphene materials and easily blocks gun orifice.

✅ Cold atomization, no heating; protects graphene structure

✅ Titanium alloy nozzle, anti-corrosion, resistant to long-time graphene suspension work

✅ Low shaping air, soft deposition, no deformation of soft EPDM rubber

✅ Precise flow & power recipe storage; stable batch consistency for mass auto parts production

✅ RS485 communication interface, easy to integrate with existing extrusion line PLC

 

Typical production workflow

1. Continuous EPDM weatherstrip extrusion → surface plasma pre-treatment (optional, improve coating adhesion)

2. RPS-SONIC ultrasonic nozzle continuous graphene spraying

3. Hot air / IR tunnel solvent flash-off & curing

4. Online friction coefficient inspection + offline aging & abrasion QC test

 

Application scope

EPDM door weatherstrip, window run channel, trunk seal, roof rubber sealing, new energy vehicle battery compartment rubber gaskets that require low friction and anti-static surface.

 

We provide free sample coating test service. Send your weatherstrip profile and graphene slurry to us, we can finish trial spraying, friction test and share process report and video for your validation before order.

 

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