Integrally-formed hard fireproof strip

Abstract

The invention provides an integrally-formed hard fireproof strip which is a strip-shaped cuboid and comprises an expandable graphite inner core and a hard plastic outer shell. The hard plastic outer shell comprises a front, two side faces and a back which are formed by a same material and jointly form a cuboid-shaped frame, a longitudinal opening is formed in the back, the expandable graphite inner core is closely fitted in the cuboid-shaped frame formed by surrounding of the hard plastic outer shell and exposed at the longitudinal opening of the back, and the hard plastic outer shell is madeof a material taking hard polyvinyl chloride resin as a basic resin raw material. Through structural improvement of the fireproof strip, the expandable graphite inner core is prevented from falling out of the shell, escaping and breaking.

Description

technical field [0001] The invention belongs to the field of doors and windows and related accessories, in particular to a fire strip for doors and windows. Background technique [0002] With the development of the door and window sealing industry and the continuous improvement of people's awareness of fire safety, people's requirements for the sealing and fire resistance of doors and windows are also increasing. The fire strip is mainly used between the door leaf and the door frame, the door leaf and the door leaf of the steel door or wooden door. When a fire occurs, the fire strip will automatically expand and seal the gap between the doors, thereby preventing the fire or toxic gas from spreading from one space to another. . [0003] The fire strips in the prior art include: fire strips made of hydrated sodium silicate, which are thick, brittle, unsightly, and have no expansibility; expandable graphite fire strips, which are generally uncoated It cannot be used alone bec...

AI Technical Summary

Problems solved by technology

[0003] The fire strips in the prior art include: fire strips made of hydrated sodium silicate, which are thick, brittle, unsightly, and have no expansibility; expandable graphite fire strips, which are generally uncoated It cannot be used alone because it is easily damaged and unsightly; there are also fire strips formed by nesting expandable graphite strips in the resin skeleton. protection, and the appearance can also be made more beautiful, but in the preparation process, it is necessary to separately prepare the expandable graphite strip and the resin skeleton shell, and then penetrate the expandable graphite strip into the resin skeleton shell, the process is complicated, and the formed Fireproof strips, in which the expandable graphite strips are easy to fall out, there is a gap between the expandable graphite strips and the resin skeleton shell, and the graphite strips are easy to break in it, and this gap will also affect the fire performance

Also disclosed in CN205243381U is a reinforced graphite fireproof strip, which includes a fireproof strip body and a metal mesh that is coated outside the fireproof strip body, and the outer layer of the fireproof strip body is embedded in the mesh of the metal mesh Inside, this setting can improve the overall strength of the fireproof strip and avoid the breakage of the fireproof strip, but the rigid structure of the metal mesh limits the expansion of the expandable graphite strip in case of fire to a certain extent, and the leakage of the graphite strip from the mesh is unsightly. Problems such as bad touch

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