PU Adhesive for Paper Honeycomb Panels
Single-component, moisture-cure polyurethane adhesive (MPU-20) for bonding paper / kraft honeycomb cores to steel, galvanized / color steel, MgO and calcium-silicate board — for flush door cores, lightweight partitions and composite panels.
A single-component adhesive for paper honeycomb
PUGLUE MPU-20 is a single-component, moisture-cure polyurethane that bonds paper / kraft honeycomb cores to steel, galvanized / color steel, MgO board and calcium-silicate board with ≥15 MPa metal-to-metal strength (on board the substrate fails first). A light water mist on the glue line raises foaming to grip the honeycomb edges. Surface-dry in under 1 hour, cures in 4–8 h, toluene- and formaldehyde-free and GB 8624 fire-rated.
Bonds Paper Honeycomb to Every Skin
One single-component system bonds paper / kraft honeycomb cores to metal and board facings.
Core
- Paper / kraft honeycomb
- Expanded paper honeycomb
Skins / facings
- Steel & galvanized / color steel
- MgO (glass-magnesium) board
- Calcium-silicate board
- Plywood, HPL & decorative board
Why this adhesive
- Single-component — no mixing
- Water-mist foaming grips honeycomb
- Toluene- & formaldehyde-free
- GB 8624 fire-rated
Types of Paper Honeycomb Adhesive — and Which to Choose
Paper honeycomb panels are bonded with several chemistries. PUGLUE’s single-component MPU-20 is the choice for fast, fire-rated honeycomb-to-board bonds.
| Adhesive type | Components | Best for | Notes |
|---|---|---|---|
| 1K PU (MPU-20) | Single-component | Paper honeycomb core-to-skin | Moisture-cure, ≥15 MPa, GB 8624 fire-rated, formaldehyde-free. PUGLUE core product. |
| PVA / white glue | 1K | Light interior door cores | Low cost but weak water / heat resistance; not fire-rated or structural. |
| Hot-melt (EVA) | 1K | Fast edge tack | Re-melts with heat — not for fire-rated structural cores. |
| 2K PU (5:1) | A + B | Aluminum honeycomb | For aluminum honeycomb — see our aluminum honeycomb adhesive. |
Where PUGLUE Paper Honeycomb Adhesive Is Used
From flush door cores to lightweight partitions, MPU-20 bonds paper honeycomb composite panels.
Flush Door Cores
Bonding paper honeycomb cores to door skins for lightweight flush and fire-rated doors.
Lightweight Partition Walls
Honeycomb-core partition and wall panels for offices, hotels and fit-outs.
MgO & Calcium-Silicate Panels
Fire-safe board faced onto paper honeycomb for lightweight fire-rated panels.
Furniture & Cabinetry
Lightweight honeycomb-core tabletops, doors and cabinet panels.
Packaging & Pallets
Honeycomb board for protective packaging, edge boards and pallets.
Exhibition & Cleanroom
Lightweight, low-emission honeycomb panels for stands and hygienic walls.
Engineered Performance
Fast, strong and clean — the profile paper honeycomb lines require.
High bond ≥15 MPa
Metal-to-metal tensile strength ≥15 MPa; on honeycomb / board the substrate fails first.
Fire-rated
GB 8624-2006 type-tested, low-flame-spread report and smoke toxicity grade ZA1 (GB/T 20285-2006).
Toluene & formaldehyde-free
Certified free of added toluene and formaldehyde — suits indoor air and green building.
Water-mist foaming
A light water mist raises foaming to grip the honeycomb cell edges for a stronger bond.
How to Apply MPU-20
A simple single-component workflow — no mixing, cured by ambient moisture.
Clean the surface
Remove oil and dust from the core and skin surfaces.
Apply 160–200 g/m²
Spread single-side with a toothed scraper or roll coater; honeycomb needs a slightly higher coat. Spray / curtain coat for special panels.
Mist & composite
A light water mist raises foaming for honeycomb contact; lay up and press.
Cure
Surface-dry in ≤1 h, full cure in 4–8 h (adjustable). Clean tools with ethyl acetate.
Technical Parameters
Single-component MPU-20 polyurethane — datasheet values, customizable to your line.
| Property | Value |
|---|---|
| Type | MPU-20 single-component polyurethane (moisture-cure) |
| Appearance | Dark brown / tan viscous liquid |
| Density | 1.15 ± 0.05 g/cm³ |
| Viscosity | 8000–9000 mPa·s (adjustable) |
| Solid content | 94% |
| Coating weight | 160–200 g/m² (honeycomb needs slightly more) |
| Surface-dry time | ≤1 h |
| Cure time | 4–8 h (adjustable) |
| Bond strength | Metal–metal ≥15 MPa; metal–non-metal: substrate fails first |
| Dilution / cleanup | Ethyl acetate |
| Packaging | 25 kg plastic drum / 200 kg iron drum |
Download Paper Honeycomb TDS (PDF)
Curing principle: single-component, cured by moisture in the air and on the bonded surface. Request the full TDS for your panel.
Certifications & Compliance
MPU-20 is type-tested to Chinese national fire and indoor-air standards — documentation available for export.
Fire performance
GB 8624-2006 type test (nine indicators meet the national standard) and a low-flame-spread test report.
Smoke toxicity
Smoke toxicity grade ZA1 to GB/T 20285-2006.
Indoor-air safety
National coating-quality reports certify no added toluene and no added formaldehyde.
Cold-storage tested
Tested by the Ministry of Agriculture cold-storage & refrigeration equipment quality centre.
Structural strength
Metal-to-metal bond ≥15 MPa; on honeycomb / board the substrate fails before the bond.
Export documentation
TDS, certificates and test reports supplied for overseas panel plants.
A Manufacturer You Can Build On
A dedicated polyurethane adhesive manufacturer — not a trading reseller — supplying honeycomb-panel plants worldwide since 2010.
Consistent, tested quality
In-house QC on every lot so viscosity, cure speed and bond strength stay repeatable.
Full technical support
TDS, certificates, free trial samples and engineer support to match your core, skin and line speed.
OEM & private label
Manufacturer-direct pricing, your branding and stable supply — no middleman.
Packaging, Samples & OEM Supply
Manufacturer-direct supply built around honeycomb-panel procurement.
Packaging
25 kg plastic drum and 200 kg iron drum — trial quantities on request.
Free trial sample
Trial samples with full TDS so you can validate bond and cure before committing.
OEM / private label
Your brand, your spec — manufacturer-friendly MOQ and repeatable batches.
Global export
Export-ready documentation, certificates and logistics support.
Frequently Asked Questions
Paper honeycomb panel adhesive (MPU-20) — technical answers.
What adhesive bonds paper honeycomb panels?
A single-component moisture-cure polyurethane — PUGLUE MPU-20. It bonds paper / kraft honeycomb cores to steel, galvanized / color steel, MgO board and calcium-silicate board, with ≥15 MPa metal-to-metal strength and a fire-rated, formaldehyde-free glue line.
How much adhesive do I need (coverage)?
Coating weight is 160–200 g/m² — honeycomb needs a slightly higher coat than flat board to bridge the cell edges.
Why spray water mist on the glue?
A light water mist raises the foaming of the moisture-cure PU so it grips the honeycomb cell walls, increasing contact area and bond strength.
Is it fire-rated and formaldehyde-free?
Yes — GB 8624-2006 type-tested with a low-flame-spread report and smoke toxicity grade ZA1, and certified free of added toluene and formaldehyde.
How long is the surface-dry and full cure?
Surface-dry in ≤1 hour and full cure in 4–8 hours (adjustable). A light water mist accelerates the moisture cure.
How is it applied?
Clean the surfaces, spread single-side with a toothed scraper or roll coater (spray / curtain coat for special panels), mist, composite and press.
What about aluminum honeycomb?
For aluminum honeycomb use our two-component 5:1 PU — see the aluminum honeycomb panel adhesive page.
What is the shelf life and how should it be stored?
Store in an ordinary indoor warehouse. Because it is moisture-cure, reseal drums after use and keep them away from humidity; nitrogen-blanket for long storage.
Do you offer samples, TDS, certificates, MOQ and OEM?
Yes. We provide a full TDS, certificates, free samples, and OEM / private-label supply with manufacturer-friendly MOQs. Contact us for a quote matched to your panel.
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