LRBG Chemicals USA MF 829
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Identification & Functionality
LRBG Chemicals USA MF 829 Features & Benefits
Applications & Uses
MF829 is specifically designed for industrial applications such as NEMA G-9 grade glass fabric laminates. Typical laminate properties are listed on the next page. MF829 has been developed to provide a melamine laminating resin with excellent solution stability at high concentrations of resin solids. This lends itself to treating applications requiring solutions solids of over 60% in order to obtain resin pick-up in the range of 40% in one pass. Based upon field experience with fabrics having an sI516 and 616 finishes, the following recommendations are offered as a guide.
- Treating solution: Optimum resin pick-up and wetting of glass fabric may be obtained with a 66% solids solution by weight of 829 in a solvent system of about 93/7 water/butanol. MF829 is readily solvated in a mixture of tepid water and butanol with 20 - 30 minutes vigorous agitation. Equipment clean up is facilitated by using a solution of approximately one gallon butanol to ten gallons tepid water. Following a wash down with this mixture, a tepid water flush should complete the clean-up.
- Treating specifications: A resin content in the range of 39 - 42% with a volatile content of 1.3 - 1.8% (ten minutes at 160°C) is recommended. Flow values obtained on 8 ply of 4” X 4” squares pressed at 300°F and 1,000psi for 5 minutes should fall in the range of 8 - 12%.
- Cure conditions: The cure cycle will be governed by the laminate thickness. For laminates of 1/16” and 1/8” thickness, a cure time of 15 - 18 minutes at 320°F and 1,000-2,0000 psi is recommended. For laminates of ½” thickness, a cure of 18-20 minutes at 310°-315°F and 1,000-2,0000 psi is recommended. Temperatures recommended are laminated temperatures.
Properties
| Value | Units | Test Method / Conditions | |
| Particle Size (Retained on 40 Mesh) | Trace | % | BTM-610B |
| Water Titer | 5 - 11 | ml | TM-633 |
| Dilutability | 24 - 33 | % | TM-633 |
| pH | 9.0 - 9.9 | - | TM-600 |
| Value | Units | Test Method / Conditions | |
| Flexural (Cond. A, MD) | 75000.0 | psi | - |
| Flexural (Cond. A, CD) | 59000.0 | psi | - |
| Impact (MD) | 19.0 | ft. lbs./ in. | - |
| Impact (CD) | 15.0 | ft. lbs./ in. | - |
| Bond Strength (1/2”) | 2000.0 | lbs. | - |
| Water Absorption | 0.22 | % | - |
| Dielectric Breakdown | 65.0 | KV | D336/50 |
| Dielectric Constant | 6.3 | - | D48/50 |
| Powder Factor | 0.018 | - | - |
| Volume Resistivity | 5 x 10⁶ | MΩ.cm | C96/35/90 |
| Surface Resistance | 1 x 10⁶ | Megohms | C96/35/90 |
| Arc Resistance (D48/50) | 184.0 | sec | - |
Regulatory & Compliance
Packaging & Availability
The standard package for MF829 is a multi-wall paper bag having a net content of 50 lbs. or packaged in a large tote bags at 500 lbs.
Storage & Handling
MF829 is a stable material which is not inclined to change provided it is stored in closed containers in a cool, dry area. Avoid direct contact with concrete floors and walls. Optimum storage conditions are below 75°F and 60% relative humidity.