Foam Core or Honeycomb: Which Construction to Put in an Order, and What Each Does to Your Approval Path

Two sample paddles come back from the factory. One has a polypropylene honeycomb core, the other a foam core, and on court they feel close enough that the decision lands on your desk as a price question. Then the purchase order needs a core line. “Foam core, 16 mm” turns out to fix almost nothing a second supplier could quote against.

The short answer: put polypropylene honeycomb in a first private-label order, and add foam later as a second model with its own name, its own test budget and a density written into the spec. Plascore specifies PP honeycomb by material, cell size, colour and thickness, with thickness held to ±0.02 in and density to ±10%. Foam is a family of grades: Kaneka’s EPERAN-PP black EPP grades mould from 30-45 g/L (VB45) up to 280-330 g/L (LB3).

And ESM clause 2.E.7 says paddles with different core material, surface material, or other significant differences must have a unique name or number, so foam never rides a honeycomb approval. Players picking a paddle for themselves can stop here: no rule favours either core. The rest is for whoever signs the order.

A spec sheet says what a core should be; cutting a finished paddle open shows what is actually in it. In this short video an independent paddle-review creator saws open paddles across four price points.

In this guide

• The two cores on one sheet
• What to write on the PO
• Certification path
• Break-in testing
• Minimums, timing, cost lines
• Picking the core
• Pre-signing checklist
• Common questions

Foam and honeycomb on one spec sheet

Page 1 for “foam vs honeycomb core pickleball paddle” compares feel, pop and noise. This table compares what the two cores do to a purchase order, a spec sheet and a certified model.

Core choice compared for a private-label order. Sources: 2026 USA Pickleball Official Rulebook, Rule 3.D.4; USA Pickleball Equipment Standards Manual Rev 3.0 (Jan 2025), 2.E.6.f and 2.E.7; UPA-A 2026 request form; Plascore PP Honeycomb brochure; Kaneka EPERAN-PP grades sheet; pickleoem.com/oem. All read 25 Sep 2026.

Factor	PP honeycomb	Foam core	Verdict
What the name fixes	Code: material, cell size, colour, thickness	A grade family, 30-45 to 280-330 g/L	Honeycomb
Published tolerance	Thickness ±0.02 in, density ±10%	Maker calls its data indicative	Honeycomb
Named in USAP rules	No (0 mentions)	No (0 mentions)	Neutral
Rules both must meet	Rigid, non-compressible; PBCoR 0.43	Same tests	Neutral: test both
Adding it to an approved model	Same core, same model	New model name (ESM 2.E.7)	Honeycomb
UPA-A request form	Core material and cell size	Core material	Neutral
Our published build	13 mm and 16 mm PP honeycomb	Not in our published build	Ask each supplier

Every Verdict here is about the order, not the court. Honeycomb wins the rows where a buyer needs something to hold a supplier to: a code, a tolerance, an existing model name. Foam wins none of them outright. It simply asks you to write more of the spec yourself. A foam-walled honeycomb, often sold as Gen 3, sits between the two; our foam-wall paddle guide covers that hybrid.

What each core leaves undefined on a purchase order

Honeycomb: cell size sets the density

“13 mm PP honeycomb” is half a specification. Cell size and density move together. Plascore’s PP1-5.0-N1-8 polypropylene honeycomb (8 mm cell) is 80.0 kg/m³ typical density (75.0 minimum), with 275 psi (1.89 MPa) typical bare compression strength. Its 10 mm cell grade, PP1-4.0-N1-10, is 64.0 kg/m³ typical (60.0 minimum) with 180 psi (1.24 MPa) bare compression.

Same material, same thickness, two different cores. Write the cell size, the density grade and the thickness tolerance on the order, and read our honeycomb cell size guide and the 14 mm vs 16 mm comparison before you fix them.

Foam: the grade name does not pin the number

Foam leaves more open. The mid grades overlap: Kaneka lists MB12 at 85-100 g/L and MB11 at 95-110 g/L moulded density, so a grade name alone does not pin the number. Kaneka also states that EPP properties depend largely on part shape and size and on moulding parameters, so its data are indicative only. Read that as an engineer would. The catalogue tells you what the bead can do; only a core cut from your own production lot tells you what you bought. Two quotes for “EPP foam core, 16 mm” can describe two different paddles, and neither supplier has broken the order.

One unit note stops a common misreading. Because 1 kg/m³ equals 1 g/L, the 80.0 kg/m³ honeycomb grade sits inside the density span Kaneka publishes for moulded EPP. Density alone does not separate the two cores, so neither can be specified by density alone.

Published density: PP honeycomb vs moulded EPP grades. Source and method: Plascore PP Honeycomb brochure (typical density) and Kaneka EPERAN-PP grades sheet (moulded-density range, indicative), read 25 Sep 2026; 1 kg/m³ = 1 g/L; maker data, not our measurements.

Core grade	Honeycomb (kg/m³)	EPP low (g/L)	EPP high (g/L)
PP 10 mm cell	64.0	—	—
PP 8 mm cell	80.0	—	—
EPP VB45	—	30	45
EPP MB12	—	85	100
EPP MB11	—	95	110
EPP LB3	—	280	330

Purchase-order lines per core. Sources: Plascore PP Honeycomb brochure (ordering code, tolerances, grade table); Kaneka EPERAN-PP grades sheet. Read 25 Sep 2026.

PO line	PP honeycomb	Foam core	Verdict
Material and grade	PP, grade code	Foam type and grade name	Both: name it
Structure	Cell size in mm	Moulded to shape, or cut from block	Both: name it
Density (kg/m³ or g/L)	Grade value, ±10%	Target value with your tolerance	Foam: you set it
Thickness (mm)	13 or 16, ±0.02 in	Target with tolerance	Both: name it
Proof from production	Supplier data sheet per lot	Density measured on lot cores	Foam: test it

What the core choice does to your approval

USA Pickleball: same tests, separate model

Start with what the rules leave out. Neither the 2026 rulebook nor the Equipment Standards Manual uses the word foam or the word honeycomb (counted 25 September 2026), and the manual served at USA Pickleball’s rules URL that day is still Revision 3.0 (January 2025). Rule 3.D.4 of the 2026 rulebook requires paddles to be made of rigid, non-compressible material meeting the criteria in the Equipment Standards Manual. ESM clause 2.E.1 repeats the same test: rigid, non-compressible material meeting the testing criteria defined in the manual.

Both cores face the same measurements, and the one that limits a lively core is rebound: the PBCoR not-to-exceed limit is 0.43, effective 1 November 2025 (it was 0.44 from 1 November 2024). Our PBCoR explainer covers the test.

The core matters at the model level. ESM clause 2.E.7: paddles with different core material, surface material, or other significant differences must have a unique name or number. ESM clause 2.F.2 subjects manufacturers to ongoing testing that products as produced and sold are identical to the paddle that was tested and certified. Put the two together and the answer is plain: an approved honeycomb model cannot ship with foam inside, and the foam version is tested under its own name. The order of steps is in our foam-core SKU certification sequence, and the clause-by-clause reading is in our core legality decoder.

UPA-A: the pro-event layer

Pro play adds a second body. UPA-A certification is required for professional events at PPA and MLP; amateur play accepts a paddle on the USAP Approved Paddle List without it. UPA-A’s 2026 request form asks for each model’s core material and honeycomb cell size. Its Average Deflection Force test requires both faces to reach 46 lb or more at 70-75°F, a stiffness floor, which is the number a soft foam build has to watch.

UPA-A’s 2026 fees are $3,000 per paddle (valid 24 months, 8 weeks), a $10,000 annual brand fee, and $2,000 to re-submit a failed paddle. One date applies to both cores: from 1 October 2026, paddles submitted to USA Pickleball must measure 2,100 RPM or less on the spin rate test.

Break-in and the useful-life clause

A paddle that passes on the day it is tested has not finished being judged. ESM clause 2.F.2.a: if a construction has failure modes, break-in periods, degradation or other gradual changes, the paddle must remain compliant over its entire useful life. ESM clause 2.F.1 lets the Board revoke an approval on 18 months’ notice if equipment is materially changed or materially degrades in ordinary use.

This is not theoretical. In its 27 December 2024 notice, USA Pickleball listed seven paddle models that exceeded testing standards and sunset them on 1 July 2025 for sanctioned tournament play. The notice names no core type as the cause, and we will not supply one. What it shows is that listed models get re-screened.

The test to write into the contract

Brand and review blogs disagree about which core holds up longer. We have found no neutral data to settle it, so the protection is a test, not a belief. For whichever core you order, ask for PBCoR measured on new samples and again after a break-in you define in writing: the number of hits, the ball, the speed. A result that rises toward 0.43 after break-in is a warning on either core. Put the protocol and the pass line in the supply agreement, and make a failing lot a supplier cost.

What we supply, MOQ and the quote lines that move

Our published build, and where it stops

Our published minimum order is 50 paddles, on the polypropylene honeycomb builds we publish; the product page does not say whether that figure applies per model, per colour or per core, so ask. Our published build envelope is raw T700 carbon and fiberglass faces on 13mm and 16mm polypropylene honeycomb cores, thermoformed unibody or cold-pressed. Foam is not in it. For a honeycomb run on our line, the 3K carbon paddle shows the core options in stock form.

Minimum order: the mould question

For foam from any supplier, start the MOQ conversation with one question: is the core moulded to the paddle outline, or cut from a moulded block? If it is moulded to shape, ask whether each outline and thickness needs its own mould, who owns it, what it costs and how many cores one fill yields. Honeycomb has no equivalent step. Plascore sells PP honeycomb as sheet up to 72 in wide or trimmed to part dimensions, so a new outline changes the cutting, not the core supply.

Lead time: ask for days per stage

Lead time needs the same treatment. We publish no per-stage figure, so ask every supplier for days per stage: core supply (stock sheet, or a moulding run), forming or pressing, finishing, golden-sample sign-off, and certification. Only the last has a published clock. UPA-A quotes 8 weeks standard and 4 weeks expedited for an extra $2,500; confirm USA Pickleball’s current testing window when you submit.

Quote lines to request separately. Sources: UPA-A 2026 Certification page and 2026 checklist; Plascore PP Honeycomb brochure; pickleoem.com published MOQ. Read 25 Sep 2026. No price figure for either core is published here.

Quote line	PP honeycomb	Foam core	Verdict
Core material	Per sheet or per blank	Per core, by density	Ask per paddle
Core tooling	None: cut from sheet	Mould per outline, if moulded	Foam: ask owner
UPA-A test (pro only)	$3,000 per paddle	$3,000 per paddle	Neutral
UPA-A samples	5 paddles, no artwork	5 paddles, no artwork	Neutral
Minimum order (pcs)	Ours: 50 published	Ask: per core?	Get it in writing

Which core to put in the order

Walk the decision in this order and stop at the first yes.

1. Is this your first paddle model? Order honeycomb at 13 mm or 16 mm. One model, one name, and a core bought to a code.
2. Do you already sell an approved honeycomb model and want a softer second SKU? Order foam as a new model under its own name, with a density target, a break-in PBCoR test and a test budget. Keep the honeycomb model unchanged.
3. Is the line aimed at PPA or MLP pro events? Either core, but each model needs UPA-A certification, and a foam build must clear the 46 lb ADF floor on both faces.
4. Is it a club or rental fleet? Order honeycomb. Replacement units must match the certified paddle under ESM 2.F.2, and a coded core is easier to re-order identically.

Core choice by line. Sources: ESM Rev 3.0 2.E.7 and 2.F.2; UPA-A 2026 Certification and ADF criteria; pickleoem.com published build and MOQ. Read 25 Sep 2026.

Line	Best for	Reason	Verdict
First private-label run	PP honeycomb	Coded core, one model name	Honeycomb
Second SKU beside an approved model	Foam	A distinct model, tested on its own	Foam, as a new model
Pro-event line	Either	UPA-A per model; ADF 46 lb floor	Test the foam early
Club or rental fleet	PP honeycomb	Identical re-orders under 2.F.2	Honeycomb

Before you sign the PO

• Core line: material, grade, cell size or foam density, thickness, each with a tolerance.
• Model name: one per core, printed on the face (ESM 2.E.7).
• Break-in test: PBCoR new and after your written break-in, with a pass line below 0.43.
• Production match: units identical to the certified paddle (ESM 2.F.2).
• Quote: core, core tooling and testing on separate lines.
• Timing: days per stage, and whether the minimum applies per core.

If any line is blank, the core choice is not finished.

Frequently asked questions