Phenolic Sandwich Panel

Product Details

Phenolic foaming panel possesses the features of light weight, fireproofing, smokeless, non-poison without dropping. And it will not burn when meeting with open flame. The range of operating temperature is wide enough which reaches from -196℃ to +200℃. It can keep unshrinking without embrittlement in low-temperature environment. Because of the high percentage of close area of the phenolic foam, the heat conduction coefficient is accordingly low(lower than 0.030w/mk) and the heat-shielding performance is good with curtain water-resistance and water vapor permeability. These characteristics make phenolic foaming panel a good material for warm-keeping and energy-saving. It is also an ideal material for HVAC refrigeration project. Phenolic has the pheny structure which determines the stable size and the rate of change is lower than 1%.
The chemical components are steady and it is antiseptic and anti-aging especially resistant to the corrosion of organic solution, strong acid and weak base. It conforms to the international environmental standard that not using Freon as the foaming agent during the production process of foaming. Phenolic contains hydrogen, oxygen and carbon in its molecular structure so that even during the pyrolysis it only reveals non-poison, tasteless gas which is harmless to both the environment and human. It also accords to the environmental protecting standard of the country. Therefore, phenolic super sandwich panel is a quite ideal thermal insulation material satisfy fireproofing, heat insulation, energy conservation, elegant appearance and environmental protection at the same time.
At the moment, there is an increasing development of phenolic foaming material in developed countries. It has been widely applied to all kinds of areas of building, national defense, foreign trade, storage, energy and so on. Phenolic material counts for 40% among the foamed plastic for sound-insulation and heat-preservation which American construction industry uses. Japan has founded association for promoting phenolic foam.
Phenolic panel possesses fantastic effect of heat preservation as a kind of organic material. It is also different from other organic materials(PU, POLY, extruded sheet) because phenolic panel can easily reach the standard of B1 level fireproof panel without adding fire retardant. The fireproof performance of phenolic panel is much better than other organic materials and its process is already mature and stable. The cost of phenolic panel is far below the cost of PU and phenolic panel doesn't need to use fuoride foaming agent in the production process. In the area of ventilating duct, phenolic panel is the best of numerous materials.

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Additional resources:
SELKIRK CORP 244215 4VP-EL45 45DEG Elbow by Selkirk

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For more information, please visit External Wall Insulation Phenolic Board.

Hi Guys,

Im after some help. Im have some problems with some glass phenolic sandwich panels. they seem to be buckling. Any solutions?

Im working off an aluminium mould, applying two plies of phenolic, curing then applying 19mm honeycomb core and a further two plies of phenolic. A pressure plate is applied before bagging. The weave of the glass phenolic is a satin weave 8 harness. There is also an airex border internally along with some aluminium inserts. The panels themselves are around 2 metres long by 1 metre wide.The amount of buckle seems to vary with every panel.

This is causing me some concern so any help would be much appreciated.

I look forward to hearing from you. Then your issue is warping. There are several possible causes.

The fabric weave is unbalanced. Are you using a balanced layup (e.g, warp face to warp face in each skin or warp face toward core in each skin)? Weave misalignment in the prepreg can also cause this,and is a very common problem. Check that the warp and fill yarns are straight and square with each other. Is the prepreg tacky or dry and boardy? Tacky prepreg can be difficult to lay down flat, without waves and bags. Pressing these flat will misalign the fabric.

Do you have a good release layer between the mold and and part? The CTE does not match so things will want tomove with temperature changes. Is the mold stiff enough to stay flat under stress?

Resin content of the two face sheets may be different due to variations in the prepreg or due to resin bleed into the core which flows to the lower surface. More resin means more shrinkage.

Phenolic releases water during cure which dries out later. Drying results in shrinkage.
I'm not familiar with Marbocote. Since you are making flat panels, I would suggest that you use a sheet of Teflon impregnated fiberglass as a release film between your part and the mold and caul. It will almost always produce better surface finish with fewer pits than a mold released surface. It can be reused many times and is easily replaced. The only problem is it is difficult to apply to contoured surfaces. It may also help you warping problem because it will slide against the aluminum if there is movement. Mold releases will release in certain areas when the shear stress between the part and the mold exceeds a certain level (due to cure shrinkage) and not in others. This can cause uneven stress in the part that will show-up as warping. I would try the same panel on a different surface such as tempered glass. See if you get the same amount of warpage. Or try a lower post cure temp for longer time if possible(check manufacturer). That should tell you if it is warping at higher temps.