国家/地区 韩国（2）
IPC部 C（3）
IPC大类 C08（3）
IPC小类 C08L（3） C09J（3） A42B（2）
C09D（2）
IPC C09J011/06（3）
发明人 CHOI J H（2） HWAN J E（2） JO C W（2）
KIM H D（2）
公开年 2023（3）
申请年 2022（3） 
专利权人

Preparing high-temperature-resistant flame-retardant expanded polystyrene foam board comprises uniformly mixing and stirring to become main ingredient including melamine resin, and high temperature resistant filler, and pasting the two load-bearing boards on both sides of the composite board.

HE Y, RUAN X

Breathable and waterproof safety helmet for inspection and diagnosis comprises safety helmet body that can be worn by workers performing safety inspection and diagnosis and has ventilation holes formed in the thickness direction.

CHOI J H, JO C W, KIM H D, HWAN J E

Waterproof helmet used in safety inspection and diagnosis applications, comprises helmet component, and waterproof film including concave-convex portion bonded to component through adhesive comprising crosslinking agent, viscosity modifier, tackifier, polypropylene and heat-resistant polyamide resin.

CHOI J H, JO C W, KIM H D, HWAN J E