Bonded Leather Board PU-WR
Grade
PU-WR = polyurethane/resin-bonded water-resistant leather board
Pick when the part sees sweat, damp or wash cycles — PU binder keeps far more wet strength than latex grades.
Values for the PU-WR condition
Other Bonded Leather Board tempers and conditions
Bonded Leather Board is listed in 4 conditions; see the grade overview at Bonded Leather Board.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Low-density flexible leather board, ~0.50 g/cm³ | Pick when softness, drape and cushioning matter more than stiffness (linings, soft insoles, padding). | — | 5 | 22 | — | 0.08 W/m·K |
STD-070Default Standard latex-bonded leather board, ~0.70 g/cm³ | General-purpose insole/lining board: best balance of stiffness, punchability and cost. | — | 8 | 15 | — | 0.1 W/m·K |
PU-WRThis page Polyurethane/resin-bonded water-resistant leather board | Pick when the part sees sweat, damp or wash cycles — PU binder keeps far more wet strength than latex grades. | — | 12 | 14 | — | — |
High-density compressed leather board, ~0.95 g/cm³ | Pick for structural shank/heel stiffeners, case frames and book board where rigidity and edge quality dominate. | — | 15 | 9 | — | 0.14 W/m·K |
What is Bonded Leather Board PU-WR?
Bonded Leather Board PU-WR is Bonded Leather Board in the PU-WR grade — pick when the part sees sweat, damp or wash cycles — PU binder keeps far more wet strength than latex grades. Bonded Leather Board PU-WR has a tensile strength of 12 MPa (1.74 ksi), weaker than 68% of natural material grades. Elongation at break is 14% and the elastic modulus is 0.7 GPa (0.102 Msi). Bonded Leather Board PU-WR has a density of 0.8 g/cm³ (0.0289 lb/in³), heavier than 70% of natural material grades. STD-070 is the default condition FabDigit quotes; PU-WR is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 14%, better than 86% of natural material grades
Limitations
- Hard to polish — 20/100, worse than 85% of natural material grades
- High embodied carbon — 3 kg CO₂/kg, worse than 85% of natural material grades
- Poor heat conductor — 0.1 W/m·K (0.0578 BTU/hr·ft·°F), worse than 84% of natural material grades
- Low stiffness — 0.7 GPa (0.102 Msi), worse than 79% of natural material grades
Bonded Leather Board PU-WR properties
Typical room-temperature values for Bonded Leather Board PU-WR; 10 are specific to this condition. Other listed values are Bonded Leather Board reference data and may not represent this condition. Bars are the position among natural material grades.
Physical2
Bonded Leather Board PU-WR has a density of 0.8 g/cm³ (0.0289 lb/in³), heavier than 70% of natural material grades.
Mechanical7
Bonded Leather Board PU-WR has a tensile strength of 12 MPa (1.74 ksi), weaker than 68% of natural material grades. Elongation at break is 14% and the elastic modulus is 0.7 GPa (0.102 Msi).
Thermal4
Bonded Leather Board PU-WR is rated for continuous service to 100°C (212 °F). It conducts heat at 0.1 W/m·K (0.0578 BTU/hr·ft·°F), worse than 84% of natural material grades.
Electrical1
Bonded Leather Board PU-WR has an electrical resistivity of 1×10⁸ Ω·m.
Chemical & Environmental1
Corrosion resistance is good (55/100), better than 69% of natural material grades.
Sustainability4
Producing a kilogram of Bonded Leather Board PU-WR takes about 35 MJ of energy and emits 3 kg of CO₂ — more than 85% of natural material grades. Typical recycled content is 70%.
Manufacturability2
Bonded Leather Board PU-WR's machinability is very good (80/100, worse than 52% of natural material grades).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Bonded Leather Board PU-WR
Is Bonded Leather Board easy to machine?
Die-cut, clicker-press, skive or laser/CNC-knife cut cleanly; carbide or hardened steel blades last longer because chrome-tanned fiber and mineral filler are abrasive, and laser cutting produces burnt-leather odor.
Can Bonded Leather Board be welded?
Not weldable — join by contact/latex/PU adhesive, stitching, riveting or heat-set edge binding.
Can Bonded Leather Board be formed, bent or molded?
Dampen or steam and press-form in a heated mold (roughly 60–90 °C) to hold three-dimensional shapes; dry fully before assembly to avoid springback and shrinkage.
What surface finishes work on Bonded Leather Board?
Accepts edge burnishing, embossing, water-based dye or pigment coating, PU top-coat and flocking; seal edges against moisture uptake, and never use solvent or acid strippers that attack the binder.
Bonded Leather Board chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| leather fiber (collagen, chrome/veg tannrecovered tannery splits, shavings and buffing dust | 60 – 90 | 78 |
| natural latex / SBR binderPU or acrylic resin in water-resistant grades | 8 – 25 | 15 |
| mineral filler (kaolin, CaCO3, talc)density/stiffness control | 0 – 12 | 4 |
| fatliquor, plasticizer, dye, biocide | 0.5 – 5 | 2 |
| moisture (equilibrium, 20 °C/65 % RH)as-supplied conditioned board | 6 – 14 | 10 |
Bonded Leather Board PU-WR — frequently asked
What is Bonded Leather Board PU-WR used for?
Bonded Leather Board PU-WR is typically used for shoe insoles, gaskets, washers and packaging inserts. In short: uniform die-cutting stock; low-cost leather substitute; consistent board density.
What is the tensile strength of Bonded Leather Board PU-WR?
Bonded Leather Board PU-WR has a typical tensile strength of 12 MPa (1.74 ksi) — weaker than 68% of natural material grades. Strength varies by condition: see the 4 listed tempers.
Is Bonded Leather Board PU-WR easy to machine?
Yes — machinability is rated very good (80/100, worse than 52% of natural material grades). Die-cut, clicker-press, skive or laser/CNC-knife cut cleanly; carbide or hardened steel blades last longer because chrome-tanned fiber and mineral filler are abrasive, and laser cutting produces burnt-leather odor.
Can Bonded Leather Board PU-WR be welded?
Not weldable — join by contact/latex/PU adhesive, stitching, riveting or heat-set edge binding.
What surface finishes work on Bonded Leather Board PU-WR?
Accepts edge burnishing, embossing, water-based dye or pigment coating, PU top-coat and flocking; seal edges against moisture uptake, and never use solvent or acid strippers that attack the binder.
Can Bonded Leather Board PU-WR be formed, bent or molded?
Dampen or steam and press-form in a heated mold (roughly 60–90 °C) to hold three-dimensional shapes; dry fully before assembly to avoid springback and shrinkage.
What is the maximum service temperature of Bonded Leather Board PU-WR?
Bonded Leather Board PU-WR is rated for continuous use to about 100°C (212 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- ASTM D6182 / D2209-type leather and leather-board tensile test practice — ASTM International (2021)
- Cellulose/leather fiberboard insole board technical sheets — Texon International and Chinese leatherboard mills (2023)
- Leather Technologists Pocket Book — reconstituted leather fibreboard — Society of Leather Technologists and Chemists (1999)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.