For Composite Release Liners - Dimensional Stability Matters
Dimensional stability is a critical factor when selecting the most appropriate release liner for an advanced composite application. Fox River Associates understands this, and supplies paper based liners with this important feature in mind.
Sourcing a composite release liner with excellent dimensional stability can make a difference in the quality of the prepreg material when it arrives at your customer. A paper release liner that has improved layflat properties and does not “expand” or “shrink” with changing environmental conditions will help ensure that your prepreg arrives at the customer in the best condition possible.
Protect your release liner for best results!
Paper, by its very nature, acts like a sponge. Depending on the relative humidity in the surrounding environment, the release liner can absorb or emit the moisture – changing its performance characteristics. Release liners are typically exposed to high temperature conditions during the silicone coating process.
Those high temperatures are required to cure the silicone coating(s) on the paper. During the high temperature curing phase, the paper loses moisture to the surrounding environment, causing the release liner to have a moisture content that is significantly lower than the equilibrium level of the paper.
This lower internal moisture content can allow the paper liner to potentially absorb moisture from the surrounding humidity in the later processes, including composite part production at your customer. As the moisture is reabsorbed in the paper liner, the paper can expand in both the machine and cross directions. If that expansion occurs after the prepreg process, it can lead to gaps between the tows in unidirectional prepreg material.
Keeping the paper release liner protected in the original, moisture protective packaging until ready to use can help minimize the amount of moisture change in the finished composite release liner in your inventory. If the entire roll is not consumed in a single run, storing the unused siliconized paper release liner in a controlled environment (humidity and temperature) will help preserve the stability of the liner.
Fox River Associates – Experienced in Composite Release Liners!
Fox River Associates supplied release liners are produced under tightly controlled conditions. The silicone coating systems are cured using the thermal method. Highly sophisticated equipment is able to replace much of the internal release liner moisture that is lost during the silicone curing process. Fox River Associates has the ability to supply siliconized paper release liners that have been targeted to a specific moisture range for optimum performance in your prepreg operation. The final result is a composite release liner that helps your product appear and perform its best when it arrives at your customer.
For more information about Fox River Associates’ full line of paper release liner products for composite and prepreg applications, use the form on this page and our experienced team will contact you.