According to news from the financial community on July 28, 2025, information from the State Intellectual Property Office shows that Guangdong Wanruitong Cable Industry Co., Ltd. applied for a patent called "a halogen-free flame retardant B1 refractory wire and its preparation method", with a public number of CN120365664A and an application date of April 2025.

The patent abstract shows that the present invention involves the field of wire materials, specifically a halogen-free flame retardant B1 grade fireproof wire and its preparation method. The present invention obtains a modified polyethylene resin by adding polyethylene, hydrogen peroxide solution, and formic acid solution. Then the olefinated phosphoryl zaphenyl, trihydroxymethylpropane-tris(3-mercaptopropionate), mercaptobranching unit, epichlorohydrin, sodium hydroxide, and tetramethylammonium bromide were added to obtain flame-retardant hyperbranched epoxy resin. By adding modified polyethylene resin, flame retardant hyperbranched epoxy resin, curing agent, 9,10-dihydro-9-oxa-10-phosphoryl-10-oxide, lubricant and antioxidant, the insulation protective jacket is obtained by extrusion granulation and melt extrusion after blending reaction. Wrap the insulating protective sleeve around the copper core wire to get the finished product. The present invention prepares an insulating protective jacket with good mechanical properties, flame retardant properties and thermal safety properties, so it has a broad application prospect in the field of wire material.

According to Tianyancha data, Guangdong Wanruitong Cable Industry Co., Ltd., established in 2011 and located in Guangzhou, is an enterprise mainly engaged in the manufacturing of electrical machinery and equipment. The registered capital of the enterprise is 116.8 million yuan. Through Tianyancha big data analysis, Guangdong Wanruitong Cable Industry Co., Ltd. has invested in a total of 1 enterprise, participated in 35 bidding projects, has 9 trademark information, 46 patent information in terms of property clues, and has 20 administrative licenses.