Product Identification
Pionite Backing Sheets are applied to the back of a substrate that is faced with a high pressure decorative laminate. With proper application, Pionite Backing Sheets will provide dimensional stability to the assembly, reducing the likelihood of warpage. Pionite Backing Sheets are phenolic laminate that are not intended for decorative surfacing. A slight variation in color is normal and should be anticipated. Pionite Backing Sheets are available in either brown or black. Backing Sheets are normally sanded on one side, however, both sides can be sanded.
Product Description
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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B20
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(in.) (mm.) |
0.020 0.5 |
30, 36, 48, 60 762, 914, 1219, 1524 |
96, 120, 144 2438, 3048, 3658 |
B28
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(in.) (mm.) |
0.028 0.7 |
30, 36, 48, 60 762, 914, 1219, 1524 |
96, 120, 144 2438, 3048, 3658 |
B37
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(in.) (mm.) |
0.038 1.0 |
30, 36, 48, 60 762, 914, 1219, 1524 |
96, 120, 144 2438, 3048, 3658 |
B48
|
(in.) (mm.) |
0.048 1.2 |
30, 36, 48, 60 762, 914, 1219, 1524 |
96, 120, 144 2438, 3048, 3658 |
*Other thicknesses of Backing Sheets are available upon request.
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Typical Uses
Pionite Backing Sheets applied to substrates faced with Pionite high pressure decorative laminate impart stability and reduce the likelihood of warpage to the final product. For best results, the backing sheet thickness should be relatively equal to that of the decorative laminate on the face of the assembly. For this reason, many thicknesses of backing sheets are offered.
Fabrication Tips
When working with Backing Sheets, these techniques will produce a quality application.
- Proper conditioning of the laminate, substrate, and backing 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 backer to a suitable substrate such as medium to high density fiberboard, particleboard, or metals. It should not be glued directly to plaster walls, gypsum wallboard, or concrete.
- Recommended adhesives include solvent or water-based contact cement, white glue (PVA), epoxy, and hot melt glue. Consult your adhesive supplier for specific application requirements.
- All saw blades and router bits used for cutting should be carbide tipped. Feed rate should be slow and tool speed should be high.
- Inside corners of cutouts for electrical outlets, sinks, etc., should have a minimum radius of 1/8" (3 mm) and be filed smooth. This reduces the likelihood of stress cracks.
- All edges of backer should be filed smooth to help prevent stress cracks and to minimize chipping.
- When nails or screws must be used, it is advisable to first drill an oversized hole through the backer. This reduces the likelihood of stress cracks.
- All laminate 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.
Codes and Certifications
- U.S. Federal Specification L-P-508H, "Plastic Sheet, Laminated, Decorative and Nondecorative." Pionite Type B20, B28, and B48 comply.
- American National Standards Institute/National Electrical Manufacturers Association (ANSI/NEMA), LD3-1995, "HighPressure Decorative Laminate." Pionite Type B20, B28, B37, and B48 comply.
