hot-pressing

hot-pressing

The pressure forming, between heated platens, of plywood, laminates, particle-board, fiberboard, etc.; usually requires thermosetting resins and heat for curing.
References in periodicals archive ?
However, phenolic resins suffer from high curing temperatures and low curing speeds, thereby requiring high hot-pressing temperatures and long hot-pressing durations (Christjanson et a1.
Therefore, we proposed a hot-pressing method with a pressure applied at 100[degrees]C for 30 min in air to reduce the contact resistance and strengthen the bonding of the Ag NWs.
V Costa, "A global model for the hot-pressing of MDF," Wood Science and Technology, vol.
In the MDF hot-pressing process many physical processes are involved and the complexity of this operation arises from the fact that they are coupled.
Four factors were studied in the experiment, resin content, hot-pressing temperature, hot-pressing time and the mass ratio of waste wood and paper, and four levels of each factor were selected out through a L16 (45) orthogonal experiment(Table 1).
More studies are necessary to obtain the evidence and data revealing the effect of hot-pressing temperature on the board properties.
The hot-pressing process is a vital step in the manufacture of wood-based composites and directly affects the properties and quality of the final products.
Internal steam pressure produced during the hot-pressing cycle in particleboard production is critical to the newly developed bond strength that will determine the overall performance of particleboard.
Earlier studies of the in-situ formation of the vertical density profile (VDP) during oriented strandboard (OSB) hot- pressing have shown significant density changes between the different thickness layers within a panel occurring well into the hot-pressing cycle.
The effects of hot-pressing and resin-curing on individual strand properties were investigated in this study.
Development of a fundamental understanding of heat transfer and resin curing during hot-pressing will help to optimize the manufacturing process of medium density fiberboard (MDF) allowing increased productivity, improved product quality, and enhanced durability.
This article describes the experimental study of preheating a medium density fiberboard fiber mat using microwave energy before hot-pressing. The experimental results showed that microwave preheating not only increases the overall mat temperature with high energy efficiency within a very short period of time, but also redistributes the moisture within the mat, creating a potentially favorable moisture gradient.