VeriCoating
EnglishFavorites

Automotive Interior Parts

Low-gloss appearance, scratch resistance and multilayer compatibility

Automotive interior parts include instrument-panel supports, door-panel frames, interior metal decorative parts, seat structures and trim. Because these parts are used in an enclosed cabin, the coating must provide a low-gloss appearance, soft visual texture and suitable safety performance.

Veri Coating offers epoxy-polyester matt wheel primer and standard-durable polyester-TGIC textured powder, providing stable matt appearance, strong adhesion and good defect-hiding ability.

Application notes: Surface cleanliness, film thickness and gloss should be controlled; when used with colour coats or clear powder, intercoat adhesion must be verified. The recommended film thickness is 70-120 um, and texture stability should also be confirmed.

Typical Powder Coating Challenges for Automotive Interior Parts

Consistency of Matt Appearance and TextureUneven matt appearance requires a stable matting system and consistent application settings.

Consistency of Matt Appearance and Texture

Adjacent metal interior parts, or different areas of one part, may vary in gloss, fineness and feel, creating visible light-dark boundaries after assembly. The principal variables are the matting system, film thickness, reclaim-powder ratio, bake profile and spray-voltage fluctuation.

Formulation Design

  1. Choose a stable matting mechanism and control resin reactivity and batch variation in the matting agent.
  2. Optimise particle-size distribution and flow to obtain a uniformly fine matt surface without local roughness.

Process Control

  1. Fix the film-thickness window, reclaim-powder blend ratio and gun settings.
  2. Correct the cure schedule using part-temperature profiles to prevent local overbake or undercure.
  3. Evaluate gloss and appearance at a fixed angle and under a defined light source, supported by limit panels.
Validation Focus
  • 60° gloss variation
  • Surface roughness
  • Batch-to-batch appearance consistency
  • Reclaim-loop stability
Gloss Loss After Contact with Perspiration and SunscreenContact-related gloss loss requires better stain, chemical and surface stability.

Gloss Loss After Contact with Perspiration and Sunscreen

Frequently touched areas such as grab handles and trim can lose gloss, whiten, soften or retain wipe marks after exposure to perspiration, sunscreen, skincare products and cleaners. Dark matt surfaces show these effects most readily. Performance depends on degree of crosslinking, surface-additive migration and chemical resistance.

Formulation Design

  1. Select a chemically resistant epoxy-polyester hybrid and improve crosslink completeness.
  2. Optimise matting agents, waxes and surface additives to reduce contaminant ingress and migration risk.

Process Control

  1. Ensure full cure to prevent surface softening from undercure.
  2. Prepare test panels in the final colour, gloss and film thickness and validate for the specified contact time.
  3. Standardise cleaners and wiping materials, avoiding secondary damage from strong solvents.
Validation Focus
  • Artificial-perspiration exposure
  • Sunscreen exposure
  • Colour/gloss after wiping
  • Surface hardness and adhesion