Journal: materials science, decoded

Engineering notes on paint-free exteriors, structural composites, and the economics of forming, written by the Compositer engineering team.

Entries: 9
Subjects: 5
Run: 14 Apr 2026 - 04 Aug 2026
Written by: Compositer engineering team

Kia PV5 paint-free high-gloss bonnet in production — Fig. 01The Kia PV5 bonnet: Class-A gloss straight from the mould, with no primer, basecoat, clear coat or oven in the process.

The 100-year formula is expiring: steel, paint, and the end of the spray booth

A century of automotive exteriors rests on one formula: stamp steel, weld it, paint it. EV weight ceilings, PBV volumes, and carbon rules are breaking all three legs at once. Here is what replaces it.

Process04 Aug 2026,8 min read

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8 of 8 entries

Materials21 Jul 2026,6 min read
UD-Tape at 0.15 mm: where every Li:ma part begins
Continuous glass fibre, fully wet-out in thermoplastic resin, controlled to a tenth of a millimetre. Inside the impregnation line that turns rovings into 240 MPa structural tape, and keeps it 100% recyclable.
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Process07 Jul 2026,7 min read
CF 85-90: Class-A gloss that never saw a paint booth
Hard-coat first and it cracks at forming strain. NEXKIN runs the chemistry in-line, before the mould, through a process window the industry said could not be run in production. The PV5 bonnet is the receipt.
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Engineering23 Jun 2026,9 min read
The crossover point: why 40-60k units a year belongs to one-shot forming
Steel stamping amortises its dies at ~100k units a year, a volume PBVs never reach. We walk through the unit-cost curves: −70% tooling CAPEX, one set of moulds, and where the lines cross.
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Engineering09 Jun 2026,6 min read
The Digital Thread: in-mould sensors, AI vision, and QA at 0.1 mm
Defects smaller than a hair get caught at the source, not at the end of the line. How in-mould sensors, lot-level fine-tuning, and inline AI vision close the loop between CAE prediction and production reality.
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Sustainability26 May 2026,5 min read
Formed, not painted: the carbon ledger of a paint-free exterior
Remove the paint line, an auto plant’s single biggest energy sink, and the math changes: 40-50% less process energy, a fully re-meltable thermoplastic part, and a Euro NCAP 4-star pedestrian rating.
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Company12 May 2026,7 min read
From order taker to platform partner: the 5-stage integrated model
The legacy chain (OEM, material maker, Tier-1 moulder, each siloed) finds defects late and competes on price only. What a material-driven, CAE-validated, sensor-fed platform does differently.
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Company28 Apr 2026,4 min read
300,000 km underground: composite pipe at planetary scale
Seven laps around the Earth, corrosion-proof, laid without a single weld. What a decade of thermoplastic composite pipe in energy infrastructure teaches us about durability claims.
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Materials14 Apr 2026,5 min read
Robots will wear thermoplastic: exterior skins for the humanoid era
Purpose-built machines need purpose-built surfaces: paint-free colour in the mould, impact-absorbing skins, and volumes that make steel economics impossible. Why robot exteriors are NEXKIN’s next category.
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Deep dives from the forming cell.

The 100-year formula is expiring: steel, paint, and the end of the spray booth

UD-Tape at 0.15 mm: where every Li:ma part begins

CF 85-90: Class-A gloss that never saw a paint booth

The crossover point: why 40-60k units a year belongs to one-shot forming

The Digital Thread: in-mould sensors, AI vision, and QA at 0.1 mm

Formed, not painted: the carbon ledger of a paint-free exterior

From order taker to platform partner: the 5-stage integrated model

300,000 km underground: composite pipe at planetary scale

Robots will wear thermoplastic: exterior skins for the humanoid era

New entries, as they are written.