Fire stopper

Patent metadata

Field	Value
Publication number	US-12564745-B2
Application number	US-202217868981-A
Country	US
Kind code	B2
Filing date	Jul 20, 2022
Priority date	Jan 24, 2020
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

A fire stopper includes a fire extinguishing agent-containing layer and a resin substrate arranged in this order.

First claim

What is claimed is:

1 . A fire stopper, comprising:
a first resin substrate, a fire extinguishing agent-containing layer comprising a fire extinguishing agent and a binder resin; a second resin substrate; and sealing portions, wherein:
the fire extinguishing agent-containing layer is positioned between is between the first resin substrate and the second resin substrate; and
peripheral edges of the first resin substrate and the second resin substrate are joined by the sealing portions, thereby sealing the fire extinguishing agent-containing layer.

2 . The fire stopper of claim 1 , wherein each of the first resin substrate and the second resin substrate comprises at least one selected from a group consisting of polyolefin, polyester, fluororesin, PVC, PVA, acrylic resin, epoxy resin, polyamide, and polyimide.

3 . The fire stopper of claim 1 , wherein each of the first resin substrate and the second resin substrate has a thickness of 4.5 to 1000 μm.

4 . The fire stopper of claim 1 , wherein a water vapor permeability of the second resin substrate (under conditions of 40° C./90% RH according to JIS K 7129) is 2×10 2 g/m 2 /day or less.

5 . The fire stopper of claim 1 , further comprising a first adhesive layer in direct physical contact with each of the fire extinguishing agent-containing layer and the first resin substrate.

6 . The fire stopper of claim 5 , further comprising a second adhesive layer in direct physical contact with each of the fire extinguishing agent-containing layer and the second resin substrate.

7 . The first stopper of claim 1 , wherein each of the first resin substrate of the second resin substrate consists of PVC, LLDPE or LLPE, a thickness of each of the first resin substrate of the second resin substrate is from 25 μm to 50 μm and a thickness of the fire extinguishing agent-containing layer is from 50 μm to 100 μm.

8 . The fire stopper of claim 7 , wherein the sealing portions comprise an ultraviolet curable sealing material.

9 . The fire stopper of claim 1 , wherein the sealing portions comprise an ultraviolet curable sealing material.

10 . The fire stopper of claim 5 , wherein the first adhesive layer has a thickness from 2 to 5 μm.

11 . The fire stopper of claim 1 , wherein each of the first resin substrate and the second resin substrate consists of a thermoplastic resin.

12 . The fire stopper of claim 1 , wherein the fire extinguishing agent-containing layer has a surface area smaller than a surface area of the first resin substrate and a surface area of the second resin substrate.

13 . The fire stopper of claim 1 , wherein each of the first resin substrate and the second resin substrate consists of polyolefin, a thickness of each of the first resin substrate of the second resin substrate is from 25 μm to 50 μm and a thickness of the fire extinguishing agent-containing layer is from 50 μm to 100 μm.

14 . The fire stopper of claim 13 , wherein the sealing portions comprise an ultraviolet curable sealing material.

15 . The fire stopper of claim 5 , wherein each of the first resin substrate and the second resin substrate consists of polyolefin, a thickness of each of the first resin substrate of the second resin substrate is from 25 μm to 50 μm and a thickness of the fire extinguishing agent-containing layer is from 50 μm to 100 μm.

16 . The fire stopper of claim 15 , wherein the sealing portions comprise an ultraviolet curable sealing material.

17 . The fire stopper of claim 16 , wherein the first adhesive layer has a thickness from 2 to 5 μm.

Assignees

• Toppan Inc

Inventors

• Yamazaki Tsukasa
• Shoda Ryo
• Tanabe Junya
• Tode Ryohei

Classifications

• B32B2457/10

  Batteries · CPC title

• B32B2307/7246

  Water vapor barrier · CPC title

• B32B2307/3065

  Flame resistant or retardant, fire resistant or retardant · CPC title

• B32B27/32

  comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title

• B32B27/304

  comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF · CPC title