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SPI's pultrusion process is the best and most cost-effective method for the production of lineal thermo set composites.
SPI pultrusions have several advantages as a replacement for extruded aluminum, vinyl, wood or steel.
Manufacturing Material Comparisons
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SPI Pultrusions |
Extruded Aluminum |
Vinyl |
Wood |
Steel |
*Wood expands due to moisture absorption.
**Wood is also susceptible to insects and mold. |
| Strength to Weight |
High |
High |
Low |
Low |
High |
| Thermal Conductivity |
Low |
High |
Low |
Low |
High |
| Expansion And Contraction |
Low |
High |
High |
Low* |
Medium |
| Corrosion And/or Chemical Resistance |
High |
Medium |
Medium |
Medium** |
Low |
| Electrical Conductivity |
Low |
High |
Low |
Low |
High |
SPI's Pultruded Product Advantages vs. Aluminum
- Superior insulation qualities: 600-800 times more thermally insulative
- Dimensionally stable: 1/3 the expansion and contraction
- Stronger: 50% more tensile strength
- Lighter: 20% - 30% less weight
SPI's Pultruded Product Advantages vs. Vinyl
- Dimensionally stable: 1/8 the expansion and contraction
- Stronger and stiffer: 5 times more tensile strength than rigid vinyl; 15 times more flexural strength
- No warping. Our pultrusions won't soften in the summer heat or get brittle in winter cold
SPI's Pultruded Product Advantages vs. Wood
- Lower maintenance. Less upkeep than wood products
- Stronger. Pultrusions have a much higher strength to weight ratio
- No insect problems. Pultrusions are not a food source for termites, carpenter ants, etc.
SPI's Pultruded Product Advantages vs. Steel
- Corrosion resistant. Pultrusions will not oxidize or corrode
- Much lighter: 75% less weight
- Better insulation qualities: 150-200 times more thermally insulative
- Stronger: Up to 30% more tensile strength than mild steel
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