2026-09-21 · KeXinMaterials Editorial Team
Foam Interior: Pick-and-Pluck vs CNC Routed vs EVA — B2B Comparison 2026
Foam interior is the highest-impact customization for B2B protective cases. Pick-and-pluck PE foam is cheapest but imprecise; CNC routed PU foam is precision but slow; EVA foam is mid-range. Here is the 2026 B2B procurement comparison.
3 Foam Types at a Glance
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 Foam Deep Dive
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 Routed PU Foam Deep Dive
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 Foam Deep Dive
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-Criteria Comparison Matrix
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.
Anti-Static + ESD Foam (Special Variants)
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 Procurement Recommendation
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 Foam Capability
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.
Key Takeaways
- Pick-and-pluck PE foam: USD 5-15/case, 0 day lead, prototyping / low-volume
- CNC routed PU foam: USD 50-200/case, 7-15 days, precision / high-value / brand
- EVA foam: USD 20-50/case, 7-15 days, tool cases / mid-range camera
- Anti-static AS foam: USD 5-15/case premium, ANSI/ESD S541 compliance
- Conductive foam: USD 20-50/case premium, ATEX/IECEx explosive env
FAQ
Which foam type is best for a 1000-piece order of camera cases?
For 1000+ pieces camera case orders, CNC routed PU foam is the best choice. Although per-case cost is higher (USD 50-200), the one-time tooling (USD 300-2000 per SKU) is spread across 1000+ units, making per-case cost competitive. CNC PU foam also provides the precision fit + professional presentation required for camera gear (typically USD 5,000-50,000 payload).
What is the difference between PE foam and PU foam?
PE foam (polyethylene): density 30-33 kg/m³, cheaper, more rigid. PU foam (polyurethane): density 50-80 kg/m³, more expensive, more shock-absorbing. PE foam is typically pick-and-pluck (pre-cut grid). PU foam is typically CNC routed (machine-cut). For B2B precision applications, PU foam is preferred due to higher density and customization.
Can anti-static foam prevent ESD damage?
Yes. Anti-static (AS) foam has surface resistivity 10^9-10^11 Ω which prevents static buildup. Conductive foam has 10^3-10^5 Ω which actively dissipates static charge. ANSI/ESD S541 standard for packaging ESD-sensitive items. For explosive environments (ATEX zones), specify conductive foam. For general electronics, AS foam is adequate.
Is pick-and-pluck foam suitable for medical equipment?
No. Pick-and-pluck PE foam is not suitable for medical equipment because: (1) imprecise fit allows movement during transit. (2) Open-cell structure can harbor bacteria. (3) Visible grid pattern is not hospital-cleanable. For medical equipment, use CNC routed PU foam with closed-cell surface + anti-microbial additive.
How long does CNC PU foam tooling last?
CNC PU foam tooling (CAD file + G-code) typically lasts for the lifetime of the SKU. Storage as digital file. Re-running on additional cases costs only machining time + foam material. Tooling amortised over 100+ cases is negligible per piece.
What is the MOQ for custom CNC foam inserts?
MOQ for custom CNC PU foam inserts varies by factory: small factories 10-50 cases, mid-size 50-100 cases, large factories 100-500 cases. At KeXinMaterials, custom CNC PU foam MOQ is 50 cases. Pick-and-pluck PE foam MOQ is 10 cases (since no tooling required).