Product Identification
Resobak is a single-ply backing sheet that can be applied to a substrate faced with high pressure decorative laminate. With proper application, Resobak will help to provide dimensional stability to the assembly, reducing the likelihood of warpage. Resobak sheets are available in either brown or black. A slight variation in color is normal and should be anticipated. Resobak sheets are not sanded.
Product Composition
Resobak is manufactured by saturating a kraft paper with resin followed by a high temperature curing process. The resin impregnated kraft is then sheeted or rolled dependent upon customer requirements. Standard core diameter for rolls is 6 inches.
Standard Nominal Sizes
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Type*
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Thickness
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Width
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Length**
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QYACR184
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(in.) (mm.) |
0.020 0.5 |
31, 37, 43, 50, 62 787, 940, 1061, 1270, 1575 |
Up to 12 feet Up to 3658mm |
QYBCR184
|
(in.) (mm.) |
0.020 0.5 |
31, 37, 43, 50, 62 787, 940, 1061, 1270, 1575 |
Up to 12 feet Up to 3658mm |
*QYA is brown, QYB is black **Also available in rolls |
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Typical Uses
Resobak sheets applied to substrates faced with Pionite high pressure decorative laminate help impart stability and reduce the likelihood of warpage to the final product. Resobak sheets are used in applications where the warpage control does not require the full balancing effect of a high pressure backer. Resobak sheets can also be painted. Applications include table bottoms, cabinet interiors, and architectural panels.
Fabrication Tips
When working with Resobak sheets, these techniques will produce a quality application.
- Proper conditioning of the laminate, substrate, and Resobak sheet minimizes possible warping, shrinking, or expansion of assembled panels. Ideally, all components should be conditioned at 70 deg. F to 75 deg. F (21 deg. C to 25 deg. C) and 45 to 50 percent relative humidity for 48 hours prior to assembly.
- Always bond Resobak to a suitable substrate such as medium to high density fiberboard, particleboard, or metals.
- When bonding Resobak with PVA glues, use less glue on the Resobak than used on the high pressure laminate.
- Always lay up the Resobak with the grain running in the same direction as the high pressure laminate grain. Failure to match up grain directions could result in warpage of the final product.
- Resobak is intended for interior use only, and should not be exposed to extreme humidity, continuous sunlight, or temperatures above 275 deg.F (135 deg.C) for extended periods of time.
Technical Information
Physical Properties
Typical Resobak Values |
TYPICAL Pionite VALUES B20 |
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Thickness 
|
(in.) (mm.) |
0.020 0.5 |
0.020 0.5 |
Unit Weight
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(lb./ft squared) (kg/m squared) |
0.085 0.394 |
0.130 0.637 |
Volatile Content
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2 - 3%
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N/A
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Water Absorption*
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84%
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16%
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Tensile Strength Machine Direction Cross Direction |
(psi) (Mpa) (psi) (Mpa) |
7800 54 4300 30 |
19700 136 11000 76 |
| *Weight increase after 2 hour immersion in water at room temperature. | |||
