Fire resistant corespun yarn and fabric comprising same

A fire resistant corespun yarn, comprising:

• a two-plied core of a high temperature resistant continuous filament comprising fiberglass and a low temperature resistant continuous filament synthetic fiber selected from the group consisting of polyethylene, nylon, polyester and polyolefin;
• a first sheath of blended staple fibers surrounding the core, the fibers comprising modacrylic fibers and melamine fibers;
• and
• a second sheath of staple fibers surrounding the first corespun yarn,
• wherein the core is from about 15 to 35% by weight based on the total weight of the corespun yarn, and the second sheath is from about 35 to 80% by weight based on the total weight of the corespun yarn.

A fire resistant fabric, comprising:

• a fire resistant fabric substrate, the substrate comprising:
• a fire resistant corespun yarn, the yarn comprising:
• a core of a high temperature resistant continuous filament comprising fiberglass;
• a first sheath of blended staple fibers surrounding the core, the fibers comprising modacrylic fibers and melamine fibers;
• and
• a second sheath of staple fibers surrounding the first corespun yarn.