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A heat-insulating material for heat-not-burn appliances and its preparation method and application

A heat-not-burn and heat-insulating material technology, applied in the field of electronic cigarettes, can solve the problems of easy release of harmful gas, poor stability, high raw material cost, etc., and achieve the effects of good air permeability, low cost, and simple processing technology

Active Publication Date: 2021-11-12
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the development of the above-mentioned materials needs to be manufactured from chemical raw materials through complex processing technology, which has problems such as complex process, high cost of raw materials, poor stability, and easy release of harmful gases when overheated.

Method used

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  • A heat-insulating material for heat-not-burn appliances and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 90g of -2.5mm~+0.25mm expanded vermiculite, 3g of powdery pseudoboehmite, and 7g of -50.0μm kaolinite, mix them, and mix them in a mixer at high speed to obtain a powder insulation material for solid filling . The powder is filled in the middle layer of the stainless steel double-layer smoke pipe of the heat-not-burn electronic cigarette. After vibration, the thermal conductivity (25°C) measured according to the national standard GB / T10294-2008 is 0.04W (m·k) -1 According to GB4736-1984, the air permeability of the product is 3.5m / s; during use, the inner layer of the tube is heated to 200°C for 10 minutes, and the temperature of the outer layer of the casing is lower than 45°C. , No cracking, good heat insulation and heat preservation effect.

Embodiment 2

[0028] Weigh 80g of -1.0mm~+0.25mm expanded graphite, 10g of solid sodium aluminate, 10g of -75.0μm sepiolite, and then weigh 100mL of deionized water, stir and mix at a high speed in a stirrer to obtain a thermal insulation material slurry for filling body. The slurry is injected into the middle layer of the stainless steel double-layer smoke tube of the heat-not-burn electronic cigarette. After drying at 110°C, the thermal conductivity (25°C) measured according to the national standard GB / T10294-2008 is 0.06W(m· k) -1 . According to GB4736-1984, the air permeability of the product is 3.2m / s; during use, the inner layer of the tube is heated to 200°C for 10 minutes, and the temperature of the outer layer of the casing is lower than 45°C. No cracking, good heat insulation and heat preservation effect.

Embodiment 3

[0030] Weigh 90g of -2.5mm~+0.25mm pumice, 4g of liquid sodium silicate, and 6g of -75.0μm attapulgite. The material is filled into a special mold, pressed by a hydraulic press at 10MPa to form a tubular billet with an inner diameter of 8mm, an outer diameter of 11mm, and a length of 85mm, and then sintered at 500°C for 2 hours to form a fixed-shaped tubular porous material device, according to the national standard GB / T10294-2008 The measured thermal conductivity (25°C) is 0.02W(m·k) -1 . The tube is nested into the middle layer of the stainless steel double-layer smoke tube of the heat-not-burn electronic cigarette. According to GB4736-1984, the air permeability of the product is 3.7m / s; during use, the inner layer of the tube is heated to 200°C After 10 minutes of use in the environment, the temperature of the outer casing is lower than 45°C, and it does not burn hands, scatter, or crack, and has good heat insulation and heat preservation effects.

[0031] The prepared pr...

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Abstract

The invention discloses a heat-insulating material for a heat-not-burn appliance and its preparation method and application. The raw material of the heat-insulation material for a heat-not-burn appliance includes natural porous minerals, a binder and a setting agent; the state of the material can be powder , solid or slurry; the product is stable in nature, and will not undergo obvious deformation or channel collapse when heated above 1000 ° C, and will not emit toxic and harmful gases; the material has natural permeability pores, good air permeability, and low air resistance; insulation Excellent thermal performance, the thermal conductivity is 0.02‑0.10W(m·k) ‑1 It can be adjusted within a certain range. The heat insulation material used in the outer layer of the heating sleeve of the electronic cigarette can prevent the electronic cigarette from cooling down too quickly, especially to prevent the outer wall from getting hot and avoid the user from being burned.

Description

technical field [0001] The invention relates to the technical field of electronic cigarettes, in particular to a heat-insulating material for a heat-not-burn appliance and a preparation method and application thereof. Background technique [0002] A variety of heat-not-burn electronic cigarette devices is an emerging development direction of flameless tobacco technology. The development and application of such devices is not only a matter of new product development, but also involves the development and application of new materials. Among them, the outer layer of the e-cigarette heating sleeve needs to use a layer of heat-insulating material to prevent the e-cigarette from cooling down too quickly, especially to prevent the outer wall from getting hot and causing users to be burned, which has important market and commercial value. [0003] In the prior art, there have been many related researches on electronic cigarette heat insulation materials, such as Reynolds patents CN1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/26C04B28/34C04B28/00C04B38/08C04B35/14C04B35/622C04B35/16C04B35/536C04B35/447C04B33/13A24F40/46A24F40/40
CPCA24F40/40A24F40/46C04B28/00C04B28/26C04B28/344C04B33/131C04B35/14C04B35/16C04B35/447C04B35/536C04B35/622C04B38/08C04B2201/32C04B2201/50C04B2235/3427C04B2235/349C04B14/202C04B14/204C04B14/106C04B14/024C04B14/042C04B22/002
Inventor 欧阳静
Owner CENT SOUTH UNIV