Composite low-smoke halogen-free high-flame-retardant wrapping tape

Abstract

The utility model provides a composite low smoke zero halogen high flame retardation wrapping tape, relates to the high flame retardation wrapping tape field, and comprises a flame retardation wrapping tape body, the upper end and the lower end of the flame retardation wrapping tape body are respectively provided with an extrusion upper roller and an extrusion lower roller, the upper surface and the lower surface of the flame retardation wrapping tape body are equidistantly provided with arc grooves; a PVC surface layer I, a PVC surface layer II, a first glass fiber mesh layer, a second glass fiber mesh layer and a polyolefin interlayer are arranged in the flame-retardant wrapping tape body, rubber bumps are annularly fixed on the outer roller surfaces of the upper extrusion roller and the lower extrusion roller, and the upper extrusion roller and the lower extrusion roller are respectively in contact with the PVC surface layer I and the PVC surface layer II of the flame-retardant wrapping tape body through the rubber bumps. According to the utility model, the problem that the normal use of the high-flame-retardant wrapping tape is influenced by the dislocation and superposition of the extrusion friction bumps due to the inconsistency between the extrusion speed of the pressing plate and the conveying speed of the wrapping tape in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the field of high flame-retardant tapes, and particularly relates to a composite low-smoke and halogen-free high flame-retardant tape. Background Art

[0002] During the manufacturing process of cables, tape winding is required. The existing fire-resistant cable tapes can meet the requirement of no release of halogen acid gas during cable combustion and have low-smoke performance, that is, less smoke is released during cable combustion, meeting the requirement of more than 60%. After retrieval, in the prior art (publication number: CN202321852878.9), a low-smoke and halogen-free high flame-retardant tape is described. It is recorded in the text that "during the manufacturing process, the high flame-retardant tape and the elastic flame-retardant tape are manufactured by extrusion through a hot pressing device. Multiple grooves are formed at the bottom of the pressing plate on the hot pressing device. During the hot pressing process, multiple friction bumps will be extruded on the upper surface of the elastic flame-retardant tape. The friction bumps help to increase the friction force of the high flame-retardant tape and facilitate the winding of the high flame-retardant tape on the outer surface of the cable". However, in the prior art, the extrusion speed of the pressing plate is inconsistent with the conveying speed of the tape, resulting in the dislocation and overlapping of the extrusion friction bumps, which affects the normal use of the high flame-retardant tape. Content of the Utility Model

[0003] In order to overcome the defects existing in the prior art, a composite low-smoke and halogen-free high flame-retardant tape is provided to solve the problem that in the prior art, the extrusion speed of the pressing plate is inconsistent with the conveying speed of the tape, resulting in the dislocation and overlapping of the extrusion friction bumps, which affects the normal use of the high flame-retardant tape.

[0004] To achieve the above object, a composite low-smoke and halogen-free high flame-retardant tape is provided, including: a flame-retardant tape body, and an extrusion upper roller and an extrusion lower roller are distributed at the upper and lower ends of the flame-retardant tape body.

[0005] Arc-shaped grooves are equidistantly arranged on the upper and lower surfaces of the flame-retardant tape body. The flame-retardant tape body contains a first PVC surface layer, a second PVC surface layer, a first fiberglass mesh layer, a second fiberglass mesh layer and a polyolefin interlayer. Rubber bumps are annularly fixed on the outer roller surfaces of the extrusion upper roller and the extrusion lower roller. The extrusion upper roller and the extrusion lower roller are respectively in contact with the first PVC surface layer and the second PVC surface layer of the flame-retardant tape body through the rubber bumps.

[0006] Further, the side ends of the extrusion upper roller and the extrusion lower roller are connected to an extrusion bracket through a transmission mechanism; and the extrusion upper roller and the extrusion lower roller are axially connected to the transmission mechanism.

[0007] Further, the flame-retardant tape body is wound and collected through a winding device.

[0008] Further, the first fiberglass mesh layer and the second fiberglass mesh layer made of high-density fiberglass grid cloth are respectively adhered to the upper and lower surfaces of the polyolefin interlayer.

[0009] Further, a PVC surface layer I with a thickness of 0.5 mm - 0.8 mm is laminated on the upper surface of the first fiberglass mesh layer.

[0010] Further, a PVC surface layer II made of a mixture of nitrile rubber and PVC is laminated on the lower surface of the second fiberglass mesh layer.

[0011] Further, arc-shaped grooves are extruded on the outer surfaces of the PVC surface layer I and the PVC surface layer II; and the arc-shaped grooves correspond to the shapes of the rubber bumps.

[0012] The beneficial effects of the present utility model are as follows. The composite low-smoke, halogen-free, highly flame-retardant tape of the present utility model uses a PVC surface layer, a fiberglass mesh layer, and a polyolefin interlayer to form a composite low-smoke, halogen-free, flame-retardant tape, enhancing the flame retardancy, aging resistance, and high-strength performance of the flame-retardant tape. By synchronously extruding the PVC surface layer of the flame-retardant tape with the upper extrusion roller and the lower extrusion roller, arc-shaped grooves are generated on the PVC surface layer, which plays a role in increasing friction, facilitating the full coating of the adhesive on the surface layer of the flame-retardant tape, better bonding the cable, and improving the self-adhesion of the composite low-smoke, halogen-free, highly flame-retardant tape. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the extrusion structure of the composite low-smoke, halogen-free, highly flame-retardant tape according to an embodiment of the present utility model.

[0014] Figure 2 It is a schematic front sectional view structure diagram of the composite low-smoke, halogen-free, highly flame-retardant tape according to an embodiment of the present utility model.

[0015] Figure 3 It is a schematic front view structure diagram of the upper extrusion roller according to an embodiment of the present utility model.

[0016] Figure 4 It is a schematic top view structure diagram of the composite low-smoke, halogen-free, highly flame-retardant tape according to an embodiment of the present utility model.

[0017] In the figure: 1. Flame-retardant tape body; 11. Arc-shaped groove; 2. Upper extrusion roller; 21. Lower extrusion roller; 22. Rubber bump; 3. Extrusion bracket; 31. Transmission mechanism; 4. Rewinding device; 5. PVC surface layer I; 51. PVC surface layer II; 6. First fiberglass mesh layer; 61. Second fiberglass mesh layer; 7. Polyolefin interlayer. Detailed Embodiment

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0019] Referring to Figures 1 to 4 As shown, the present utility model provides a composite low-smoke, halogen-free and highly flame-retardant tape, including: a flame-retardant tape body 1, an extrusion upper roller 2 and an extrusion lower roller 21 are distributed at the upper and lower ends of the flame-retardant tape body 1.

[0020] Arc-shaped grooves 11 are equidistantly arranged on the upper and lower surfaces of the flame-retardant tape body 1. The flame-retardant tape body 1 contains a first PVC layer 5, a second PVC layer 51, a first fiberglass mesh layer 6, a second fiberglass mesh layer 61 and a polyolefin interlayer 7. Rubber bumps 22 are annularly fixed on the outer roller surfaces of the extrusion upper roller 2 and the extrusion lower roller 21. The extrusion upper roller 2 and the extrusion lower roller 21 are in contact with the first PVC layer 5 and the second PVC layer 51 of the flame-retardant tape body 1 respectively through the rubber bumps 22.

[0021] The composite low-smoke, halogen-free and highly flame-retardant tape is composed of a PVC layer, a fiberglass mesh layer and a polyolefin interlayer 7, which enhances the flame retardancy, aging resistance and high strength performance of the flame-retardant tape. By synchronously extruding the PVC layer of the flame-retardant tape through the extrusion upper roller 2 and the extrusion lower roller 21, arc-shaped grooves are generated on the PVC layer, which plays a role in increasing friction, facilitating the full coating of the adhesive on the surface layer of the flame-retardant tape, better bonding the cable, and improving the self-adhesion of the composite low-smoke, halogen-free and highly flame-retardant tape.

[0022] In this embodiment, the side ends of the extrusion upper roller 2 and the extrusion lower roller 21 are connected to an extrusion bracket 3 through a transmission mechanism 31; and the extrusion upper roller 2 and the extrusion lower roller 21 are axially connected to the transmission mechanism 31. The flame-retardant tape body 1 is wound and collected through a winding device 4.

[0023] As a preferred implementation manner, the transmission mechanism 31 drives the extrusion upper roller 2 and the extrusion lower roller 21 to rotate synchronously, and extrudes and composites the multi-layer composite flame-retardant tape body 1. The winding device 4 facilitates the winding and sorting of the extruded and formed flame-retardant tape body 1.

[0024] In this embodiment, a first fiberglass mesh layer 6 and a second fiberglass mesh layer 61 made of high-density fiberglass mesh cloth are respectively adhered to the upper and lower surfaces of the polyolefin interlayer 7.

[0025] As a preferred embodiment, the glass fiber mesh layer, the polyolefin interlayer 7 and the PVC surface layer form a composite low-smoke and halogen-free flame-retardant tape body 1, which is convenient for enhancing the flame retardancy, aging resistance and high-strength performance of the flame-retardant tape body 1, and making the flame-retardant tape body 1 more durable.

[0026] In this embodiment, a PVC surface layer 5 with a thickness of 0.5 mm - 0.8 mm is laminated on the upper surface of the first glass fiber mesh layer 6. A PVC surface layer 51 made of a mixture of nitrile rubber and PVC is laminated on the lower surface of the second glass fiber mesh layer 61. Arc-shaped grooves 11 are extruded on the outer surfaces of the PVC surface layer 5 and the PVC surface layer 51; and the arc-shaped grooves 11 correspond to the shapes of the rubber bumps 22.

[0027] As a preferred embodiment, both the PVC surface layer 51 and the PVC surface layer 5 are made of the same material and have the same thickness, and the PVC surface layer made of a mixture of nitrile rubber and PVC has a certain elasticity, which is convenient for the rubber bumps 22 to be extruded to form arc-shaped grooves 11, facilitating the full coating of the adhesive on the surface layer of the flame-retardant tape, better bonding the cable, and improving the self-adhesion of the composite low-smoke and halogen-free high flame-retardant tape.

[0028] The composite low-smoke and halogen-free high flame-retardant tape of the present invention can effectively solve the problems of extrusion friction convex block misalignment and lamination affecting the normal use of the high flame-retardant tape, enhance the flame retardancy, aging resistance and high-strength performance of the flame-retardant tape, facilitate the full coating of the adhesive on the surface layer of the flame-retardant tape, better bond the cable, improve the self-adhesion of the composite low-smoke and halogen-free high flame-retardant tape, and is applicable to the composite low-smoke and halogen-free high flame-retardant tape.

[0029] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite low-smoke zero-halogen high-flame-retardant tape, comprising: The flame-retardant tape body (1), with an extrusion upper roller (2) and an extrusion lower roller (21) distributed at the upper and lower ends of the flame-retardant tape body (1), is characterized in that: Arc-shaped grooves (11) are equidistantly arranged on the upper and lower surfaces of the flame-retardant tape body (1). The flame-retardant tape body (1) internally contains a first PVC surface layer (5), a second PVC surface layer (51), a first fiberglass mesh layer (6), a second fiberglass mesh layer (61), and a polyolefin interlayer (7). Rubber bumps (22) are annularly fixed on the outer roller surfaces of the extrusion upper roller (2) and the extrusion lower roller (21). The extrusion upper roller (2) and the extrusion lower roller (21) are respectively in contact with the first PVC surface layer (5) and the second PVC surface layer (51) of the flame-retardant tape body (1) through the rubber bumps (22).

2. The composite low-smoke zero-halogen highly flame-retardant tape according to claim 1, wherein The side ends of the extrusion upper roller (2) and the extrusion lower roller (21) are connected to an extrusion bracket (3) through a transmission mechanism (31); and the extrusion upper roller (2) and the extrusion lower roller (21) are axially connected to the transmission mechanism (31).

3. The composite low-smoke, halogen-free and highly flame-retardant tape according to claim 1, characterized in that The flame-retardant tape body (1) is wound up through a winding device (4).

4. The composite low-smoke zero-halogen high-flame-retardant tape according to claim 1, characterized in that, The first fiberglass mesh layer (6) and the second fiberglass mesh layer (61) made of high-density fiberglass mesh cloth are respectively adhered to the upper and lower surfaces of the polyolefin interlayer (7).

5. A composite low-smoke, halogen-free, highly flame-retardant tape according to claim 1, characterized in that, A first PVC surface layer (5) with a thickness of 0.5 mm - 0.8 mm is laminated on the upper surface of the first fiberglass mesh layer (6).

6. The composite low-smoke zero-halogen high-flame-retardant tape according to claim 1, characterized in that, A second PVC surface layer (51) made of a mixture of nitrile rubber and PVC is laminated on the lower surface of the second fiberglass mesh layer (61).

7. A composite low-smoke, halogen-free, highly flame-retardant tape according to claim 1, characterized in that Arc-shaped grooves (11) are extruded on the outer surfaces of the first PVC surface layer (5) and the second PVC surface layer (51); and the arc-shaped grooves (11) correspond to the shapes of the rubber bumps (22).

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