一种低胶耐火云母带
By designing low-adhesion fire-resistant mica tape, utilizing the fixing structure of the glass fiber layer and side plates, and the design of pressure relief holes, the problem of composite mica tape swelling and cracking due to temperature rise was solved, improving the fire resistance and compressive strength of the cable and ensuring the stable operation of the cable.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU RONGDING CABLE MATERIAL CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-17
AI Technical Summary
Existing composite mica tape is prone to bulging and cracking due to temperature rise after being wrapped around the cable, and adhesive overflow is likely to occur when the cable is bent, affecting the stability and safety of the cable line.
The design adopts a low-adhesion fire-resistant mica tape, which includes a mica sheet substrate, a glass fiber layer, side sheets, and a thin film layer. The glass fiber layer and the side sheets are fixed to form a T-shaped pressure-resistant layer, and pressure relief holes are provided in the side sheets to release internal pressure, thereby enhancing tensile and tear resistance.
It effectively prevents mica tape from bulging due to temperature rise, reduces adhesive overflow, improves the fire resistance and compressive strength of the cable, avoids side cracks of the mica tape, and ensures stable operation of the cable.
Smart Images
Figure CN224519559U_ABST
Abstract
Claims
1. A low rubber fire resistant mica tape comprising a mica sheet substrate (1), characterized in that, It also includes a first glass fiber layer (2) disposed on the upper surface of the mica substrate (1), a second glass fiber layer (3) disposed on the lower surface of the mica substrate (1), a first side piece (21) fixedly installed on the outer side of the first glass fiber layer (2), a second side piece (31) fixedly installed on the outer side of the second glass fiber layer (3), a first cast polyethylene film (4) bonded to the top of the first glass fiber layer (2), and a top adhesive layer (5) coated on the top of the first cast polyethylene film (4), a first polyimide film (6) bonded to the top of the top adhesive layer (5), and an upper surface coating layer (7) coated on the top surface of the first polyimide film (6).
2. The low-adhesion fire-resistant mica tape according to claim 1, characterized in that, The lower surface of the second glass fiber layer (3) is bonded with a second cast polyethylene film (41), the bottom of the second cast polyethylene film (41) is coated with a bottom adhesive layer (51), a second polyimide film (61) is bonded to the bottom of the bottom adhesive layer (51), and a lower surface coating layer (71) is coated on the bottom of the second polyimide film (61).
3. The low-adhesive fire-resistant mica tape of claim 1, wherein, Pressure relief holes (8) are provided inside both the first side piece (21) and the second side piece (31).
4. The low-adhesive fire-resistant mica tape of claim 1, wherein, The thickness of the first glass fiber layer (2) and the second glass fiber layer (3) is 0.01mm-0.025mm.
5. The low-adhesive fire-resistant mica tape of claim 1, wherein, Both the first polyimide film (6) and the second polyimide film (61) are opaque black films.
6. The low-adhesive fire-resistant mica tape of claim 1, wherein, The first glass fiber layer (2) and the second glass fiber layer (3) are both mesh structures, and the first glass fiber layer (2) and the second glass fiber layer (3) are bonded to the mica substrate (1) with an adhesive.
7. The low-adhesive fire-resistant mica tape of claim 1, wherein, The thickness of the first cast polyethylene film (4) and the second cast polyethylene film (41) is 0.015-0.03 mm.