Burn through resistant nonwoven mat, barrier, and insulation system

A burn through resistant fire barrier for use in a thermal and/or acoustical insulation blanket system, comprising:

• a burn through resistant nonwoven mat comprising from about 74.5% to about 98.9% by weight quartz base fibers having a mean diameter between 6 microns and 12 microns, an average length of from about 10 mm to about 40 mm, and a service temperature of at least 1100° C.;
• from about 1% to about 10% by weight biosoluble glass microfibers having a mean diameter between about 0.7 microns and about 1.5 microns;
• and from about 0.1% to about 0.5% by weight lubricant sizing with a water repellent additive;
• the base fibers and the biosoluble glass fibers being randomly oriented and entangled together to form the nonwoven mat;
• the nonwoven mat being capable of retaining its integrity and dimensional stability for at least four minutes during exposure to a 1100° C. temperature and pulsating high pressure flame front in accordance with the FAA medium scale burn through test;
• and the nonwoven mat having a basis weight between about 30 g/m2 and about 100 g/m2.

A burn through resistant fire barrier for use in a thermal and/or acoustical insulation blanket system, comprising:

• a burn through resistant nonwoven mat comprising from about 20% to about 80% by weight quartz base fibers having a mean diameter between 6 microns and 12 microns, an average length of from about 10 mm to about 40 mm, and a service temperature of at least 1100° C., from about 20% to about 80% aluminosilicate, aluminoborosilicate and/or alumina ceramic oxide base fibers having a mean diameter between 6 microns and 12 microns, an average length of from about 5 mm to about 20 mm, and a service temperature of at least 1100° C.;
• from about 1% to about 10% by weight biosoluble glass microfibers having a mean diameter between about 0.7 microns and about 1.5 microns;
• and from about 0.1% to about 0.5% by weight lubricant sizing with a water repellent additive;
• the nonwoven mat being from about 74.5% to about 98.9% by weight the base fibers;
• the base fibers and the biosoluble glass microfibers being randomly oriented and entangled together to form the nonwoven mat;
• the nonwoven mat being capable of retaining its integrity and dimensional stability for at least four minutes during exposure to a 1100° C. temperature and pulsating high pressure flame front in accordance with the FAA medium scale burn through test and the nonwoven mat having a basis weight between about 30 g/m2 and about 100 g/m2.

A burn through resistant fire barrier for use in a thermal and/or acoustical insulation blanket system, comprising:

• a burn through resistant nonwoven mat comprising from about 74.5% to about 98.9% by weight biosoluble glass base fibers having a service temperature of at least 1100° C., a mean diameter between 3 microns and 10 microns, and an average length between about 5 mm and about 25 mm;
• from about 1% to about 10% by weight biosoluble glass microfibers having a mean diameter between about 0.7 microns and about 1.5 microns;
• and from about 0.1% to about 0.5% by weight lubricant sizing with a water repellent additive;
• the base fibers and the biosoluble glass microfibers being randomly oriented and entangled together to form the nonwoven mat;
• the nonwoven mat being capable of retaining its integrity and dimensional stability for at least four minutes during exposure to a 1100° C. temperature and pulsating high pressure flame front in accordance with the FAA medium scale burn through test;
• and the nonwoven mat having a basis weight between about 30 g/m2 and about 100 g/m2.

A burn through resistant fire barrier for use in a thermal and/or acoustical insulation blanket system, comprising:

• from about 74.5% to about 99.9% by weight partially oxidized pitch based base fibers or partially oxidized polyacrylonitrile base fibers having a mean diameter between 1 micron and 12 microns, an average length ranging from about 10 mm to about 30 mm and a service temperature of at least 1100° C., and from about 0.1% to about 0.5% by weight lubricant sizing with a water repellent additive;
• the base fibers being randomly oriented and entangled together to form the nonwoven mat;
• the nonwoven mat being capable of retaining its integrity and dimensional stability for at least four minutes during exposure to a 1100° C. temperature and pulsating high pressure flame front in accordance with the FAA medium scale burn through test;
• and the nonwoven mat having a basis weight between about 30 g/m2 and about 100 g/m2.

A burn through resistant fire barrier for use in a thermal and/or acoustical insulation blanket system, comprising:

• a burn through resistant nonwoven mat comprising from about 74.5% to about 98.9% by weight quartz base microfibers having a mean diameter less than 6 microns;
• from about 1% to about 10% by weight biosoluble glass microfibers having a mean diameter between about 0.7 microns and about 1.5 microns;
• and from about 0.1% to about 0.5% by weight lubricant sizing with a water repellent additive;
• the base fibers and the biosoluble glass microfibers being randomly oriented and entangled together to form the nonwoven mat;
• the nonwoven mat being capable of retaining its integrity and dimensional stability for at least four minutes during exposure to a 1100° C. temperature and pulsating high pressure flame front in accordance with the FAA medium scale burn through test;
• and the nonwoven mat having a basis weight between about 30 g/m2 and about 100 g/m2.