Jun 26, 2026News & Insights
Common CNC Cutting Problems in PET Felt Panels
Common CNC cutting issues in PET felt acoustic panels and how early design review can reduce structural problems and material waste.
Common CNC Cutting Problems in PET Felt Panels (And How to Avoid Them Before Production)
Many PET felt acoustic panel projects look perfect in rendering.
But during CNC cutting, problems appear.
Edges become weak.
Panels bend.
Glue line shows.
Material waste increases.
These problems usually do not come from bad material.
They come from misunderstanding how PET felt behaves during CNC processing.
Problem 1: Deep Groove Cutting Weakens Panel Structure
PET felt is compressed polyester fiber.
When cutting depth is too aggressive, especially on laminated panels, internal layers may separate.
This happens more often in:
- 12+12 mm laminated panels
- Very narrow slot patterns
- Complex curved design
Before finalizing the drawing, cutting depth and panel structure should be checked together. As panel structure also affects acoustic performance. 👉Why 24mm PET Panels Cannot Reach Class A
Problem 2: Small Module Size Increases Waste
When every panel is different size, nesting becomes inefficient.
CNC machine cuts from full sheet.
If layout is not optimized, offcuts increase quickly.
Even 20 mm difference in module width can change sheet utilization significantly.
Problem 3: Ignoring Sheet Direction
PET felt has fiber direction after hot pressing.
If cutting layout ignores this, panels may show slight visual difference under light.
This is not defect.
It is material property.
How to Avoid These Issues
Before production, confirm:
- Panel structure (laminated or solid)
- Maximum cutting depth
- Sheet size used by factory
- Nesting layout preview
- Estimated waste percentage
Early technical review prevents most CNC problems.Once production starts, changes are expensive.
Need Technical Review for Your Drawing?
If you are planning custom PET felt acoustic panels with CNC patterns, we can review your layout before production.
Send your file.
We will check cutting feasibility and material efficiency.
More pages related
