Engineering Plastics In Protective Cases
Engineering-grade PP is a polypropylene formulation modified for predictable mechanical behaviour — typically a copolymer with rubber phase, a nucleating agent or a mineral filler — so that stiffness, low-temperature toughness and creep resistance are held within a stated range rather than left to a general-purpose grade.
Key points
- Thirty-eight KeXin models are specified as engineering PP rather than general PP.
- The certificate of analysis is the evidence; a brand name is not.
- Fillers raise stiffness and reduce creep, and usually reduce elongation.
- Pigmentation is part of the material system outdoors, not a colour choice.
What to ask for
Applications
This matters most where the case is part of a movement chain rather than shelf packaging. In military and outdoor & recreation the same shell is specified differently because the handling, the environment and the verification requirement differ.
- Military — Military equipment moves through a chain of handlers, none of whom own the equipment and all of …
- Outdoor & Recreation — Consumer and professional outdoor brands buy cases as a component of their product. That means c…
Customisation
Everything described above is configurable on a standard shell: interior layout (pick-and-pluck, die-cut or CNC-cut), foam grade and thickness, colour, logo method, latch and lock count, pressure-equalisation valve, cable ports, document holder and identification plate. A bespoke exterior geometry requires a new mould — 125 days, from 3,000 units per moulded component.
Procurement considerations
| Question | What to send us |
|---|---|
| Which shell fits? | Equipment L × W × H as packed, plus required clearance per axis |
| What does it cost? | Order quantity and estimated annual quantity — the two drive different answers |
| Is tooling needed? | Whether an existing shell clears the envelope with usable foam depth |
| Lead time? | Your required delivery date, not just the order date |
| Certification? | The exact standard your tender names — we will say whether we can test to it |
| Freight? | Destination and preferred terms; carton and pallet data supplied with the quotation |
Comparison and selection guide
The tables on this page exist because a protective case is chosen by comparing three things: the envelope, the environment and the handling chain. Where no table applies, the rule below is.
| Situation | What To Do |
|---|---|
| Start from the equipment, not the case | Measure the tallest, widest and longest points of the packed equipment including antennas, handles and connectors. Add 20 mm minimum clearance per axis before selecting a shell. |
| Then choose the carrying method | Under 8 kg, a fixed handle is lighter and cheaper. Over 12 kg or any journey over 30 m, specify the T series with telescopic handle and wheels. |
| Then decide the interior | Pick-and-pluck for kits that change. Die-cut or CNC-cut for fixed layouts that must be auditable at a glance. |
- Size on internal dimensions plus clearance, never on a product name.
- Choose the carrying method before the shell: it changes the series, not just the price.
- Specify the interior last, and decide up front whether the end user will reconfigure it.
Engineering Plastics In Protective Cases relates to Material Guide. Related families: Military Protective Cases / Waterproof Cases. Related sectors: Military / Outdoor & Recreation. Continue in the Material Guide cluster.
This page is written from our own production data. If your requirement differs, send the dimensions and we will tell you which of the 155 models fits, or whether a custom route is needed.
