2026-09-21 · KeXinMaterials 編集チーム
フォーム内装:Pick-and-Pluck vs CNC ルーティング vs EVA — B2B 比較 2026
フォーム内装は B2B 保護ケースの最も影響力のあるカスタマイズ。Pick-and-Pluck PE フォームは最安だが不正確;CNC ルーティング PU フォームは正確だが遅い;EVA フォームはその中間。2026 B2B 調達比較。
3 つのフォームタイプ概要
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 フォーム詳細
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 ルーティング PU フォーム詳細
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 フォーム詳細
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 基準比較マトリックス
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.
帯電防止 + ESD フォーム(特殊バリアント)
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 調達推奨
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 フォーム能力
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.
重要なポイント
- Pick-and-Pluck PE フォーム:USD 5-15/ケース、0 日リードタイム、プロトタイピング / 小ロット
- CNC ルーティング PU フォーム:USD 50-200/ケース、7-15 日、精度 / 高価値 / ブランド
- EVA フォーム:USD 20-50/ケース、7-15 日、ツールケース / 中級カメラ
- 帯電防止 AS フォーム:USD 5-15/ケース プレミアム、ANSI/ESD S541 準拠
- 導電性フォーム:USD 20-50/ケース プレミアム、ATEX/IECEx 防爆環境
よくある質問
カメラケース 1000 個の注文にどのフォームタイプが最適ですか?
1000+ 個のカメラケースには CNC ルーティング PU フォームが最適。ケースあたりコストは USD 50-200 ですが、1 回限りのツール(USD 300-2000/SKU)が 1000+ ユニットに分散されます。
PE フォームと PU フォームの違いは何ですか?
PE フォーム(ポリエチレン):密度 30-33 kg/m³、安価、剛性。PU フォーム(ポリウレタン):密度 50-80 kg/m³、高価、衝撃吸収性が高い。PE フォームは通常 Pick-and-Pluck。PU フォームは通常 CNC ルーティング。
帯電防止フォームは ESD 損傷を防止できますか?
はい。帯電防止(AS)フォームは表面抵抗率 10^9-10^11 Ω で静電気を防止。導電性フォームは 10^3-10^5 Ω で静電気を積極的に放散します。
Pick-and-Pluck フォームは医療機器に適していますか?
いいえ。Pick-and-Pluck PE フォームは医療機器に適していません:(1) 不正確な適合。(2) オープンセル構造が細菌を宿す可能性。(3) 目に見えるグリッドパターンは病院清掃不可。
CNC PU フォームツールの寿命はどのくらいですか?
CNC PU フォームツール(CAD ファイル + G コード)は通常 SKU の生涯持続します。デジタルファイルとして保存。
カスタム CNC フォームインサートの MOQ は?
カスタム CNC PU フォームインサートの MOQ は工場により異なる:小工場 10-50 ケース、中工場 50-100 ケース、大工場 100-500 ケース。KeXinMaterials:CNC PU フォーム MOQ 50 ケース。