2026-09-21 · KeXinMaterials Redaktionsteam

Schaumstoff-Innenraum: Pick-and-Pluck vs CNC-gefräst vs EVA — B2B-Vergleich 2026

Schaumstoff-Innenraum ist die wirkungsvollste Anpassung für B2B-Schutzkoffer. Pick-and-Pluck PE-Schaumstoff ist am günstigsten, aber unpräzise; CNC-gefräst PU-Schaum ist präzise, aber langsam; EVA-Schaumstoff liegt dazwischen.

3 Schaumstofftypen auf einen Blick

Pick-and-pluck PE foam, CNC routed PU foam, and EVA foam cover 95% of B2B case interior demand. Each fits different use cases: pick-and-pluck for prototyping, CNC for precision, EVA for production.

Pick-and-pluck foam (PE — polyethylene): pre-cut 1cm x 1cm grid. Buyer manually plucks cubes to fit shape. Cost USD 5-15 per case (cheap). Lead time 0 days (stock). Limitation: imprecise fit, cubes fall out over time.

CNC routed foam (PU — polyurethane, sometimes PE): CAD-designed, machine-cut to exact geometry. Cost USD 50-200 per case (mid-high). Lead time 7-15 days (custom). High: precision fit, repeatable, presentable.

EVA foam (ethylene-vinyl acetate): die-cut or heat-formed. Cost USD 20-50 per case (mid). Lead time 7-15 days. Mid: presentable + decent precision + cheaper than CNC PU. Common in tool cases.

For B2B procurement, choose based on: equipment value (high → CNC), order volume (low → pick-and-pluck), presentation (high → EVA or CNC), budget (low → pick-and-pluck).

Pick-and-Pluck PE-Schaum im Detail

Pick-and-pluck is the cheapest and fastest foam option. Best for low-volume prototyping and basic protection.

Material: polyethylene (PE) foam, density 30-33 kg/m³. Pre-cut grid pattern with 1cm cubes. Buyer plucks cubes by hand to fit equipment shape. Available in 4-6 colors.

Cost: USD 5-15 per case (lowest). Stock foams ship same-day; custom foam only needs plucking step.

Lead time: 0 days (if stock foam) or 1-3 days (custom plucking). Fastest option.

Protection: medium. PE foam 30-33 kg/m³ density provides shock absorption for typical 25G impact. Less protective than CNC PU foam 50-80 kg/m³.

Presentation: low. Visible 1cm grid pattern. Equipment does not fit perfectly. Industrial use, not for camera/medical equipment.

Best for: prototyping (before CNC tooling), low-volume orders (under 50 cases), basic industrial protection, replacement foam.

CNC-gefräster PU-Schaum im Detail

CNC routed polyurethane foam is the premium choice for B2B precision protection. Used by Pelican, military, medical, drone industries.

Material: polyurethane (PU) foam, density 50-80 kg/m³ (anti-static available). CAD → G-code → CNC hotwire or mill. Custom cavity geometry for each equipment item.

Cost: USD 50-200 per case (highest). Custom design adds USD 300-2000 one-time tooling per SKU. Multi-cavity foam for camera/drone/medical equipment fits precisely.

Lead time: 7-15 days (custom). Faster on repeat orders (existing CAD).

Protection: highest. PU foam 50-80 kg/m³ density absorbs 50G+ impact. Anti-static (ESD) variants for electronics. Conductive variants for explosive environments.

Presentation: highest. Smooth cavity walls, custom labels (laser-etched), professional appearance. Standard for camera/broadcast/medical/military.

Best for: precision equipment (camera, drone, medical, military), high-value payload (>USD 10,000), repeated orders (>100 cases), professional B2B brands.

EVA-Schaum im Detail

EVA foam is the mid-range option. Heat-formed or die-cut. Common in tool cases, consumer electronics, mid-range camera cases.

Material: ethylene-vinyl acetate (EVA) foam, density 30-50 kg/m³. Available in laminated sheets (multiple densities), die-cut shapes, or heat-formed 3D shapes.

Cost: USD 20-50 per case (mid). Lower than CNC PU foam. Higher than pick-and-pluck PE foam.

Lead time: 7-15 days (die-cut). 10-20 days (heat-formed 3D).

Protection: medium-high. EVA foam 30-50 kg/m³ is denser than PE foam but less dense than CNC PU foam. Good for tools and consumer electronics.

Presentation: medium-high. Smooth surfaces, presentable colors, brand-able. Common in tool cases (Stanley, DeWalt, Bosch).

Best for: tool cases, consumer electronics, mid-range camera cases, OEM brands wanting good presentation without CNC premium.

5-Kriterien-Vergleichsmatrix

Score each criterion 1-3 across the three foam types. Highest total wins. Score 1 = poor fit, 2 = acceptable, 3 = excellent fit.

Criterion 1 — Equipment value: under USD 1,000 = pick-and-pluck OK. USD 1,000-10,000 = EVA or CNC PU. USD 10,000+ = CNC PU.

Criterion 2 — Order volume: under 50 cases = pick-and-pluck. 50-500 = EVA. 500+ = CNC PU (amortised tooling).

Criterion 3 — Presentation need: industrial only = pick-and-pluck. Tool/consumer = EVA. Camera/medical/military = CNC PU.

Criterion 4 — Lead time: same-day = pick-and-pluck. 7-15 days = EVA or CNC PU. 15+ days = CNC PU (full custom).

Criterion 5 — Budget: under USD 10/case = pick-and-pluck. USD 10-50 = EVA. USD 50-200 = CNC PU.

Antistatische + ESD-Schäume (Spezialvarianten)

For electronics, semiconductor, and explosive environments, anti-static (AS) and conductive foam are required. Available in PU and PE variants.

Anti-static (AS) foam: surface resistivity 10^9-10^11 Ω. Prevents static buildup. Standard for electronics packaging. Available in PU and PE. Adds USD 5-15 per case.

Conductive foam: surface resistivity 10^3-10^5 Ω. Full ESD protection. Required for explosive environments (ATEX zones). Available in PU foam + carbon black. Adds USD 20-50 per case.

Compliance: ANSI/ESD S541 (Packaging Materials for ESD Sensitive Items). IEC 61340-5-1 (ESD protection). Required for semiconductor, electronics, explosive environments.

For B2B buyers: specify AS foam for general electronics. Specify conductive foam for ATEX/IECEx explosive environments. Specify CNC PU AS foam for high-value electronics.

B2B-Beschaffungsempfehlung

Below is the typical 2026 B2B foam recommendation by use case.

Drone case (1-5 kg payload, USD 1,000-10,000 drone): CNC PU foam with custom cavity for drone body + remote controller + batteries + accessories. Anti-static variant if drone is for electronics / PCB testing.

Camera / photography (USD 5,000-50,000 gear): CNC PU foam with custom cavity for each lens / body / accessory. Laser-etched labels for professional presentation.

Tool case (industrial / automotive): EVA foam die-cut. Laminated 30-50 kg/m³ density. Mid-range cost + good presentation. Common in Stanley, DeWalt, Bosch tool cases.

Medical device case (USD 5,000-50,000): CNC PU foam with cleanable surface (closed-cell PU). Anti-microbial additive on request. Smooth surfaces for hospital cleaning.

Military / tactical (USD 1,000-50,000): CNC PU foam MIL-spec. Black, anti-static, with Velcro / strap systems for accessory retention. Often multiple foam layers.

KeXinMaterials Schaumstofffähigkeit

KeXinMaterials offers all 3 foam types + custom design + anti-static + conductive + MIL-spec. EXW Shenzhen / FOB Shenzhen / FOB Ningbo only.

Pick-and-pluck PE foam: stock in 30/33 kg/m³ density. 4 colors. Same-day ship from Shenzhen.

CNC routed PU foam: 50/60/70/80 kg/m³ density. Anti-static + conductive + closed-cell variants. CAD design free or USD file accepted.

EVA foam: 30-50 kg/m³ density. Die-cut or heat-formed. Multi-layer lamination for hard + soft layered foam.

MOQ: pick-and-pluck 10 cases. CNC PU 50 cases. EVA die-cut 100 cases.

Lead time: pick-and-pluck 0-3 days. CNC PU 7-15 days (custom). EVA die-cut 7-15 days.

FAQ

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