When standard trays can’t handle deep-draw, high-density vertical insertion — engineered thermoforming can.
The Packaging Challenge in PCBA Logistics
As electronic assemblies grow denser and more sensitive, the packaging that protects them during storage and transit must keep pace. For PCBA boards, two requirements frequently collide:
Maximize Quantity per Tray
Reducing packaging cost per unit and improving logistics efficiency demands high-density packing — fitting more boards per tray without compromising protection.
Vertical (Edge-Standing) Insertion
Required when component height profiles or soldering joints make flat stacking risky. Vertical insertion dramatically increases tray depth relative to footprint.
Deep-Draw Demolding
The deeper the cavity, the harder it is to maintain uniform wall thickness and release the part cleanly from the mold. Many suppliers avoid this geometry altogether.
ESD Protection
PCBA boards are highly sensitive to electrostatic discharge. Packaging must provide permanent, reliable ESD-dissipative properties throughout its service life.
Why ESD HIPS?
High Impact Polystyrene (HIPS) with a permanent ESD additive is the workhorse material for electronics packaging trays. Here’s why it stands out:
|
Parameter |
Value |
|
Surface Resistance |
10⁵–10⁹ Ω — falls within the ESD-dissipative range per ANSI/ESD S541 |
|
Material Color |
Carbon-black filled (Black) — permanent ESD performance, not a topical coating |
|
Sheet Gauge |
2.2 mm (pre-form) → ~1.5 mm (finished wall) — structural rigidity under stacking loads |
|
Thermoformability |
Excellent — wide forming window, critical for uniform wall distribution in deep cavities |
Compared to Alternatives
|
Material |
Pros |
Cons |
|
PET/PETG |
Higher clarity |
Narrower forming window; difficult in deep-draw |
|
PP |
Good chemical resistance |
Poorer dimensional stability; costlier ESD grades |
|
PS (General Purpose) |
Low cost |
Too brittle for stacking and repeated handling |
|
ESD HIPS |
Optimal balance |
Formability + strength + ESD + cost |
Engineering Deep-Draw Vertical-Insertion Trays
The core technical challenge: fitting 32 vertical PCBA slots into a compact 280 × 180 × 58 mm tray envelope — with reliable demolding.
Draw Ratio Management
Individual slot cavities push local draw ratios much higher. Optimized draft angles (3°–5°) facilitate mold release. Radiused transitions at cavity bottoms prevent thinning and stress concentration.
Wall Thickness Control
Maintaining ≥1.5 mm finished wall thickness across 32 deep slots requires precise plug-assist pre-stretching and controlled heating profiles for uniform sheet temperature.
Stacking Architecture
Designed for 180° nesting — rotating every other tray to interlock. Three loaded trays stack to approximately 160 mm total height, fitting standard ESD bins.
Slot Geometry for PCBA
Each of the 32 positions features controlled-width channels matching PCB edge thickness, support ribs preventing board-to-board contact, and clearance for protruding components.
Technical Specifications
|
Parameter |
Value |
|
Material |
Black ESD HIPS (permanent carbon-loaded) |
|
Finished Wall Thickness |
1.5 mm |
|
Outer Dimensions |
280 × 180 × 58 mm |
|
Surface Resistance |
10⁵–10⁹ Ω |
|
Capacity |
32 PCS per tray |
|
Stacking |
180° rotation nesting; 3 trays ≈ 160 mm height |
Deep-draw thermoforming of ESD HIPS is not a commodity process — it requires precise tooling design, material expertise, and process control to deliver trays that are compact yet high-capacity, structurally sound yet easily demolded.
When to Specify ESD HIPS Deep-Draw Trays
This tray design is particularly suited for scenarios demanding vertical insertion and maximum density in a compact footprint.
• SMT Production Lines
• Incoming/Outgoing Inspection
• Warehousing & Shipping
• Tall Component Profiles
• ESD-Sensitive Assemblies
• Inter-Process Transport
Need a Custom Tray Design?
From DFM review to sampling in days, not weeks. Tell us about your PCBA dimensions and requirements.
Email: info@yufapolymer.com
Website: www.yufapolymer.com
YUFA Polymer Products Co., Ltd. — Shenzhen, China
