US 12,225,636 B2
Self-regulating carbon fiber composite planar electrothermal material and manufacturing method therefor
Juncheng Quan, Shanghai (CN); Chuonan Wang, Shanghai (CN); Yumei Ma, Shanghai (CN); and Shouzhi Quan, Shanghai (CN)
Assigned to Shanghai Junhui New Materials Technology Co., Ltd., Shanghai (CN)
Filed by Shanghai Junhui New Materials Technology Co., Ltd., Shanghai (CN)
Filed on Jul. 26, 2024, as Appl. No. 18/786,409.
Application 18/786,409 is a continuation of application No. PCT/CN2023/107118, filed on Jul. 13, 2023.
Claims priority of application No. 202210831673.6 (CN), filed on Jul. 15, 2022.
Prior Publication US 2024/0389198 A1, Nov. 21, 2024
Int. Cl. H05B 3/14 (2006.01); H05B 3/34 (2006.01)
CPC H05B 3/141 (2013.01) [H05B 3/34 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A self-regulating far-infrared carbon fiber composite planar electrothermal material, comprising
two reinforced insulating layers,
two insulating layers,
two self-regulating layers,
a heating layer comprising an upper surface and a lower surface,
a connecting terminal, and
a power supply lead,
wherein the reinforced insulating layers, the insulating layers, the self-regulating layers, and the heating layer form the self-regulating far-infrared carbon fiber composite planar electrothermal material by high-temperature hot pressing, impregnation, and curing,
the connecting terminal is riveted on copper electrodes at two ends of the self-regulating far-infrared carbon fiber composite planar electrothermal material,
the power supply lead is snap-fitted on a wiring groove of the connecting terminal,
the self-regulating layers are semi-cured sheets formed by impregnating a cloth material with a self-regulating composite solvent and performing drying and hot pressing,
the cloth material is a non-woven fabric or a fiberglass fabric,
the non-woven fabric is a polyester fiber non-woven fabric, a polypropylene fiber non-woven fabric, a polyamide fiber non-woven fabric, a spandex fiber non-woven fabric, or an acrylic fiber non-woven fabric, and a fixed weight of the non-woven fabric is 20 to 100 g/m2;
the fiberglass fabric is an alkali-free fiberglass fabric or a medium-alkali fiberglass fabric, and a fixed weight of the fiberglass fabric is 50 to 150 g/m2;
the self-regulating composite solvent is an epoxy resin solution where thermoplastic polymers are uniformly dispersed, wherein the epoxy resin solution and the thermoplastic polymers are uniformly mixed at a weight ratio of 10:(0.5-1),
the thermoplastic polymers are formed by performing airflow crushing and mixing on polypropylene powder, polyethylene powder, and polyvinylidene fluoride powder at a weight ratio of 2:(1-1.5):(0.1-0.3),
the epoxy resin solution is formed by uniformly mixing a brominated epoxy resin solution, a 6101 epoxy resin solution, and a diluent at a weight ratio of 10:(3-6):(1-0.3), wherein the brominated epoxy resin solution is a brominated bisphenol A epoxy resin, a brominated phenolic epoxy resin, or a dibromopentaerythritol epoxy resin, and the diluent is ethyl acetate, butyl acetate, or acetone.