无硫/低硫柔性石墨卷材又称柔性石墨纸或柔性石墨板材，是用天然鳞片石墨经化学处理后，经过加热高温膨化形成石墨蠕虫，这种像蠕虫一样的石墨粉的密度约为0.003g/cc。然后经滚压形成柔性石墨卷材。 膨胀石墨卷材不含粘结剂和填充物，因此纯度很高，具有良好的耐腐蚀性、耐放射性、 耐高/低温、良好的压缩回弹性、并具有自润滑性和不渗透性，适用于低压部位的密封。石墨卷材和金属薄板可以复合成多种形式的石墨复合板。
Sulfur free / low sulfur flexible graphite sheet, also known as flexible graphite paper or flexible graphite sheet, is made by the follow process: First natural flake graphite is deal with chemical treatment, then after heating in high temperature it takes in forms of graphite worms, the density is about 0.003 g/cc . Then after rolling it became flexible graphite sheet. Expandable graphite roll is without binder and filler, so the purity is high, with good corrosion resistance, radiation resistance, high / low temperature resistance, good compression resilience, and have the self lubrication and non permeability, suitable for low pressure parts of the sealling. The graphite sheet and the metal sheet can be combined to make various forms of graphite composite plates.
性能特点： Performance characteristics
Excellent heat resistance and cold resistance. From ultra-low temperature of -270 degrees to 3650 degrees (in non oxidizing gas) of high temperature, the physical properties has almost no change, in the air , it can also be used 450 degrees.
Excellent chemical resistance. Flexible graphite were corrosive in Strong oxidizing medium such as aqua regia, concentrated nitric acid and concentrated and high temperature dichromate, Potassium Permanganate, ferric chloride, Corrosion resistant to almost all inorganic and organic media.
Good self lubrication. The same as natural graphite, the flexible graphite is easy to slide under the action of external force, so it has the property of lubrication, good abrasion resistance and small friction coefficient;
High rebound rate. When the shaft or sleeve has a deviation and radial runout for manufacturing, installation problems, it has sufficient floating performance, even if the graphite cracks, it can close together, thus ensuring closeness and preventing leakage.
Used as graphite packing ring material.
Can be combined with a metal sheet into a graphite composite plate to be cut into various shapes of sealing gaskets.
Used for making various low pressure gaskets or after processing into thick plates.