CN209183346U - A heat-shrinkable tube that resists indentation and shrinks rapidly - Google Patents

Abstract

The utility model provides a quick shrink's of resistance to compression trace pyrocondensation pipe includes inside hollow waterproof bonding layer, and the outside laminating on waterproof bonding layer has the heat-sink shell in the elastic sheathing layer, waterproof bonding layer and elastic sheathing layer are extruded through multilayer crowded mode altogether and are formed. The utility model discloses pyrocondensation pipe has anti indentation, anticorrosive effect and accelerates the process of shrink cladding.

Description

A heat-shrinkable tube that resists indentation and shrinks rapidly

technical field

The utility model relates to the technical field of heat-shrinkable tubes, in particular to a heat-shrinkable tube resistant to indentation and rapid shrinkage.

Background technique

Heat shrinkable tubes have been widely used in various fields such as protection of electronic and electrical components, cables and wires, optical fiber wiring, pipe sealing and anticorrosion, etc., and can play the role of insulation and sealing for internal protection.

However, most of the existing heat-shrinkable tubes are EVA blended polymers, which generally have no anti-indentation effect. In addition, there are also problems such as non-concentrated heat, long heating time, slow shrinkage, affecting efficiency, and poor corrosion resistance during heating shrinkage coating.

Utility model content

The technical problem to be solved by the utility model is: to overcome the defects of existing heat-shrinkable tubes that are easy to produce indentations, poor corrosion resistance and slow shrinkage, and provide a heat-shrinkable tube that has anti-indentation, anti-corrosion effects and accelerated shrinkage wrapping process.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical scheme: a heat-shrinkable tube resistant to indentation and rapid shrinkage includes a hollow waterproof adhesive layer inside, and an elastic sheath layer is attached to the outside of the waterproof adhesive layer. The outer surface of the elastic sheath layer is pasted with a heat absorbing layer, and the waterproof adhesive layer and the elastic sheath layer are extruded through multi-layer co-extrusion.

A further limitation of the above technical solution is that the material of the waterproof adhesive layer is polyethylene vinyl acetate hot melt adhesive, polyamide hot melt adhesive or polyurethane hot melt adhesive.

The further limitation of the above technical solution is that the elastic sheath layer is a cross-linked EVA polymer layer, and the cross-linked EVA polymer layer is formed by radiation cross-linking of polyethylene, polyethylene vinyl acetate, and nitrile rubber blending. , or made of polyethylene, polyethylene vinyl acetate, ethylene propylene rubber blended radiation crosslinked, or polyethylene, polyethylene vinyl acetate, silicone rubber blended radiation crosslinked.

The further limitation of the above technical solution is that the heat absorbing layer is a mixed liquid coating of an infrared absorber and an ultraviolet absorber, the infrared absorber is phthalocyanine or naphthalocyanine, and the ultraviolet absorber is benzophenone or Arylated cyanoacrylates.

A further limitation of the above technical solution is that the thickness of the heat absorbing layer is 0.1-0.3 mm.

A further limitation of the above technical solution is that the heat-shrinkable tube resistant to indentation and rapid shrinkage further includes an anti-corrosion layer coated on the outside of the heat-absorbing layer.

A further limitation of the above technical solution is that the anti-corrosion layer is a nano-silicon dioxide coating.

A further limitation of the above technical solution is that the thickness of the anti-corrosion layer is 10-50 μm.

Compared with the prior art, the utility model has the following positive effects: the utility model is a heat-shrinkable tube that resists indentation and shrinks rapidly. Compared with the traditional heat-shrinkable tube, the elastic sheath layer is based on EVA and rubber Cross-linking together can improve the resilience of the heat-shrinkable tube. When the heat-shrinkable tube is shrunk at a high temperature on the shrinkable object, the indentation due to external stress extrusion can rebound by itself, avoiding leaving traces and affecting the appearance; In addition, the heat absorbing layer can absorb heat when heating and shrinking, so that the heat is more concentrated on the periphery of the elastic sheath layer, speeding up the coating process, improving efficiency, and can also absorb ultraviolet rays to slow down aging; The outer surface of the sleeve body is coated with nano-silica coating, which can enhance the corrosion resistance and salt spray resistance of the heat-shrinkable tube, so that the heat-shrinkable tube has better adaptability in different environments.

Description of drawings

Fig. 1 is a schematic structural view of the first embodiment of the heat-shrinkable tube resistant to indentation and rapid shrinkage of the present invention.

Fig. 2 is a schematic structural view of a second embodiment of the heat-shrinkable tube resistant to indentation and rapid shrinkage of the present invention.

Detailed ways

As shown in Figure 1, the first embodiment of the heat-shrinkable tube of the utility model that resists indentation and rapidly shrinks includes a hollow waterproof adhesive layer 2 inside, and an elastic sheath layer is pasted on the outside of the waterproof adhesive layer 2 3. The outer surface of the elastic sheath layer 3 is pasted with a heat absorbing layer 4, and the waterproof adhesive layer 2 and the elastic sheath layer 3 are extruded by multi-layer co-extrusion.

The material of the waterproof adhesive layer 2 is polyethylene vinyl acetate hot melt adhesive, polyamide hot melt adhesive or polyurethane hot melt adhesive.

The waterproof adhesive layer 2 is located at the innermost layer of the anti-indentation and rapid shrinkage heat shrinkable tube of the present invention, and is closely bonded to the shrinkable object (not shown in the figure), so that moisture and other sundries cannot invade the inside from the side.

The elastic sheath layer 3 is a cross-linked EVA polymer layer, and the cross-linked EVA polymer layer is made of polyethylene, polyethylene vinyl acetate, and nitrile rubber blended by radiation cross-linking, or made of polyethylene, poly Ethylene vinyl acetate, ethylene propylene rubber blended radiation crosslinked, or polyethylene, polyethylene vinyl acetate, silicone rubber blended radiation crosslinked.

Compared with the traditional EVA heat-shrinkable tube, the elastic sheath layer 3 of the utility model is cross-linked with rubber on the basis of EVA, which can improve the resilience of the heat-shrinkable tube. , The indentation due to external stress extrusion can rebound by itself, avoiding leaving marks and affecting the appearance.

The heat absorbing layer 4 is a mixed liquid coating of an infrared absorber and an ultraviolet absorber, the infrared absorber is phthalocyanine or naphthalocyanine, and the ultraviolet absorber is benzophenone or arylated cyanoacrylate .

The thickness of the heat absorbing layer 4 is 0.1-0.3mm.

The heat-absorbing layer 4 can absorb heat when the heat-shrinkable tube is heated and shrunk, making the heat more concentrated on the periphery of the elastic sheath layer 3, speeding up the coating process, improving efficiency, and also absorbing ultraviolet rays to slow down aging Function, prolong the service life of the heat shrinkable tube.

As shown in Figure 2, the second embodiment of the heat-shrinkable tube of the utility model that resists indentation and shrinks quickly includes the same waterproof adhesive layer 2, elastic sheath layer 3, and heat-absorbing layer 4 as in Embodiment 1. It includes an anti-corrosion layer 5 plated on the outside of the heat absorbing layer 4 .

The anti-corrosion layer 5 is nano silicon dioxide coating.

The thickness of the anti-corrosion layer 5 is 10-50 μm.

Coating nano-silica coating on the outside of the heat-absorbing layer 4 can improve the corrosion resistance and salt spray resistance of the heat-shrinkable tube, so that the heat-shrinkable tube has better adaptability in different environments, for example, it can be applied to cable wrapping on ships Under relatively harsh environments such as covering and so on.

The utility model has the following beneficial effects:

1. The elastic sheath layer 3 of the present utility model is cross-linked with rubber on the basis of EVA, which can improve the resilience of the heat-shrinkable tube. And the indentation can rebound by itself, avoiding leaving marks and affecting the appearance.

2. The heat-absorbing layer 4 can absorb heat when the heat-shrinkable tube is heated and shrunk, making the heat more concentrated on the periphery of the elastic sheath layer 3, speeding up the coating process, improving efficiency, and also absorbing ultraviolet rays to slow down The effect of aging can prolong the service life of the heat shrinkable tube.

3. Coating nano-silica coating on the outside of the heat-absorbing layer 4 can improve the corrosion resistance and salt spray resistance of the heat-shrinkable tube, so that the heat-shrinkable tube has better adaptability in different environments, for example, it can be applied to ships Relatively harsh environments such as cable covering.

Claims (6)

1. a kind of heat-shrink tube of resistance to compression trace rapid desufflation, which is characterized in that it includes the waterproofing tack coat of inner hollow, in waterproof It is fitted with flexible sheath layer outside adhesive layer, heat-sink shell, the waterproofing tack coat and bullet are fitted with outside flexible sheath layer Property restrictive coating is squeezed out by multi-layer co-extruded mode.

2. the heat-shrink tube of resistance to compression trace rapid desufflation according to claim 1, which is characterized in that the material of the waterproofing tack coat Material is plastic of poly vinyl acetate hot melt adhesive, polyamide hot or polyurethane hot melt.

3. the heat-shrink tube of resistance to compression trace rapid desufflation according to claim 1, which is characterized in that the heat-sink shell with a thickness of 0.1-0.3mm。

4. the heat-shrink tube of resistance to compression trace rapid desufflation according to claim 1, which is characterized in that the resistance to compression trace rapid desufflation Heat-shrink tube further includes the etch resistant layer for having the outside for being plated in heat-sink shell.

5. the heat-shrink tube of resistance to compression trace rapid desufflation according to claim 4, which is characterized in that the etch resistant layer is nanometer Silica dioxide coating.

6. the heat-shrink tube of resistance to compression trace rapid desufflation according to claim 4 or 5, which is characterized in that the etch resistant layer 10-50 μm of thickness.