โค๊กเพตรเลียมคัลซีนดํา โค๊กโรงงานหล่อ โค๊ก / โค๊กเมท / โค๊กแข็ง

The expansion volume is consistent, forming a strong, insulating char layer. It's highly effective and environmentally friendly compared to traditional options. Highly recommended for anyone in the fire safety materials industry.

This is our first order of expandable graphite for R&D purposes. The product arrived well-packaged and dry. The technical data sheet provided was accurate. We tested the expansion ratio under high heat, and it matched the manufacturer's claim closely. The flake size distribution was good. Customer service was responsive to our pre-sale inquiries. Will order again for our larger batch production.

The quality has been remarkably consistent across multiple orders over the past two years. The physical and chemical analysis reports provided with each shipment are accurate and detailed, which simplifies our inbound QC. Deliveries are always on schedule. For anyone needing a dependable supply of specification-grade flake graphite, this supplier is a solid choice.