Heat transfer suppression sheet and battery pack

2:

• The heat transfer suppression sheet according to claim 1, wherein the first organic fiber is at least one selected from the group consisting of a crystalline organic fiber having a glass transition point of 120° C. or higher and an organic fiber having no glass transition point.

3:

• The heat transfer suppression sheet according to claim 1, wherein
• the first organic fiber has a melting point Tm at a temperature of 200° C. or higher, and
• an elastic modulus of the first organic fiber at Tm° C. is 0.1% or more with respect to an elastic modulus of the first organic fiber at 23° C.

4:

• The heat transfer suppression sheet according to claim 1, wherein the first organic fiber is at least one selected from a polyethylene terephthalate fiber, a polybutylene terephthalate fiber, a polytrimethylene terephthalate fiber, a polyacetal fiber, a polytetrafluoroethylene fiber, a polyetheretherketone fiber, a polyphenylene sulfide fiber, a polyamide fiber, and a polyparaphenylphthalamide fiber.

5:

• The heat transfer suppression sheet according to claim 1, wherein a content of the first organic fiber is 1 mass % or more and 10 mass % or less with respect to a total mass of the heat transfer suppression sheet.

6:

• The heat transfer suppression sheet according to claim 1, further comprising:
• a second organic fiber having a glass transition point, wherein
• in a case where the first organic fiber has a glass transition point, the glass transition point of the second organic fiber is higher than a glass transition point of the resin binder and lower than the glass transition point of the first organic fiber.

7:

• The heat transfer suppression sheet according to claim 1, further comprising:
• a second organic fiber having a glass transition point, wherein
• in a case where the first organic fiber has no glass transition point, the glass transition point of the second organic fiber is higher than a glass transition point of the resin binder.

8:

• The heat transfer suppression sheet according to claim 6, wherein the glass transition point of the second organic fiber is 250° C. or lower.

9:

• The heat transfer suppression sheet according to claim 6, wherein the second organic fiber includes at least one selected from a polyvinyl alcohol fiber, a polyethylene fiber, a nylon fiber, a polyurethane fiber, and an ethylene-vinyl alcohol copolymer fiber.

10:

• The heat transfer suppression sheet according to claim 1, wherein the first inorganic particle is a particle composed of at least one kind of inorganic material selected from an oxide particle, a carbide particle, a nitride particle, and an inorganic hydrate particle.

11:

• The heat transfer suppression sheet according to claim 1, further comprising:
• a first inorganic fiber and a second inorganic fiber different from each other in at least one property selected from an average fiber diameter, a shape, and a glass transition point.

12:

• The heat transfer suppression sheet according to claim 11, wherein
• the average fiber diameter of the first inorganic fiber is larger than the average fiber diameter of the second inorganic fiber, and
• the first inorganic fiber is linear or acicular, and the second inorganic fiber is dendritic or curly.

15:

• The heat transfer suppression sheet according to claim 1, further comprising:
• a second inorganic particle composed of a metal oxide.

16:

• The heat transfer suppression sheet according to claim 1, wherein the resin binder includes at least one selected from a styrene-butadiene resin, an acrylic resin, a silicone-acrylic resin, and a styrene resin.