Anti-aging heat shrinkable sleeve

Abstract

The utility model discloses an anti -aging's heat shrinkable sleeve, including heat shrinkable sleeve, the heat shrinkable sleeve is by cross -linking polyolefin base layer, outer layer and hot melt adhesive layer combination constitutes, the outer layer sets up in cross -linking polyolefin base layer outside, the outer layer and cross -linking polyolefin base layer integrated molding, the hot melt adhesive layer is bonded in cross -linking polyolefin base layer inner wall, the inside of outer layer is provided with a plurality of resin microcapsule, the inside encapsulation of resin microcapsule has antioxidant, through setting up resin microcapsule in the inside of outer layer, makes the antioxidant in resin microcapsule slow release under high temperature, through the free radical produced in the heat oxygen reaction of antioxidant " capture ", terminates chain oxidation, can avoid traditional antioxidant because of quick evaporation failure simultaneously, improves the anti -aging of heat shrinkable sleeve.

Description

Technical Field

[0001] This utility model relates to the field of heat shrink tubing technology, and in particular to an anti-aging heat shrink tubing. Background Technology

[0002] With the rapid development of power, automotive, aerospace, and outdoor new energy fields, heat shrink tubing, as a core component for cable insulation protection and joint sealing, is facing increasingly complex application scenarios. Harsh conditions such as outdoor exposure, high and low temperature cycling in industrial environments, humid heat and salt spray, and chemical corrosion place stringent requirements on the long-term reliability of heat shrink tubing—it must not only maintain basic insulation and sealing performance, but also possess durable anti-aging capabilities to avoid cracking, embrittlement, and insulation failure caused by aging of traditional heat shrink tubing, thereby preventing equipment failure, safety hazards, and extending the product's entire life cycle.

[0003] Existing conventional heat shrink tubing mostly uses ordinary polyolefin base material with only a small amount of antioxidants or UV absorbers added, resulting in a simple anti-aging design. Under long-term environmental stress, the molecular chains of the base material are prone to oxidation and breakage, as well as UV degradation, leading to a decrease in the mechanical strength of the heat shrink tubing and failure of its sealing performance. Its service life is generally less than 3-5 years, which is insufficient to meet the long-term protection requirements of 8-15 years in fields such as new energy and outdoor communications.

[0004] Therefore, this application provides an anti-aging heat shrink tubing. Utility Model Content

[0005] This invention provides an anti-aging heat shrink tubing that can solve the problem of traditional heat shrink tubing aging easily in high-temperature environments.

[0006] This utility model provides an anti-aging heat shrink tubing, comprising:

[0007] A heat shrink tubing, comprising a cross-linked polyolefin base layer, an outer layer, and a hot melt adhesive layer, wherein the outer layer is disposed on the outside of the cross-linked polyolefin base layer and is integrally formed with the cross-linked polyolefin base layer, the hot melt adhesive layer is bonded to the inner wall of the cross-linked polyolefin base layer, and a plurality of resin microcapsules are disposed inside the outer layer, wherein the resin microcapsules are encapsulated with antioxidants.

[0008] In an embodiment of the present invention, an anti-aging heat shrink tubing is provided with a heat shrink section one, a heat shrink section two, and a transition section arranged from left to right. The radius and heat shrink ratio of the heat shrink section two are greater than those of the heat shrink section one. The beginning and end of the transition section are connected to the heat shrink section one and the heat shrink section two, respectively, and its radius gradually increases from beginning to end.

[0009] In an anti-aging heat shrink tubing according to one embodiment of the present invention, the thickness of the connection between the transition section and the first and second heat shrink sections is thicker than that of other areas of the tubing itself.

[0010] In an anti-aging heat shrink tubing according to one embodiment of the present invention, the ratio of the heat shrink ratio of the second heat shrink section to that of the first heat shrink section does not exceed 1:3.

[0011] In an anti-aging heat shrink tubing according to one embodiment of the present invention, the inner walls of both ends of the cross-linked polyolefin base layer are provided with annular waterproof protrusions.

[0012] In an anti-aging heat shrink tubing according to one embodiment of the present invention, the hot melt adhesive layer is bonded to the interior of the cross-linked polyolefin base layer, and the hot melt adhesive layer is located between two waterproof protrusions.

[0013] In an anti-aging heat shrink tubing according to one embodiment of the present invention, a silicone layer is bonded to the inner wall of the cross-linked polyolefin base layer, and the inner wall of the silicone layer is bonded to a hot melt adhesive layer.

[0014] The technical solution provided in this application embodiment may include the following beneficial effects: This application designs an anti-aging heat shrink tubing.

[0015] 1. By setting resin microcapsules inside the outer layer, the antioxidants inside the resin microcapsules are slowly released at high temperature. The antioxidants "capture" the free radicals generated in the thermo-oxidative reaction, terminating the chain oxidation. At the same time, it can avoid the failure of traditional antioxidants due to rapid volatilization, thus improving the anti-aging properties of the heat shrink tubing.

[0016] 2. The heat shrink tubing has two different shrinkage ratios at both ends, thus breaking through the limitations of traditional "single ratio" heat shrink tubing. It can more accurately adapt to the covering needs of variable diameter and irregularly shaped parts. By setting a transition section with an increasing radius structure, the shrinkage rate can be smoothly transitioned from high to low, preventing bulging and wrinkling caused by excessive shrinkage rate changes.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0020] Figure 2 This is a partial cross-sectional view of Embodiment 1 of this application;

[0021] Figure 3 This is a partial cross-sectional view of Embodiment 2 of this application;

[0022] Figure 4 This is a partial cross-sectional view of Embodiment 3 of this application. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] Example 1

[0027] like Figures 1 to 2 As shown, this application provides an anti-aging heat shrink tubing, comprising:

[0028] The heat shrink tubing 100 is composed of a cross-linked polyolefin base layer 10, an outer layer 20, and a hot melt adhesive layer 30. The outer layer 20 is disposed on the outside of the cross-linked polyolefin base layer 10 and is integrally formed with the cross-linked polyolefin base layer 10. The hot melt adhesive layer 30 is bonded to the inner wall of the cross-linked polyolefin base layer 10. Multiple resin microcapsules 21 are disposed inside the outer layer 20, and antioxidants are encapsulated inside the resin microcapsules 21.

[0029] By adopting the above technical solution, the outer layer 20 is set to protect the outside of the heat shrink tubing. The hot melt adhesive layer 30 is set so that the heat shrink tubing melts during the heating and shrinking process, tightly bonding the heat shrink tubing to the covered part (such as cable), thus improving structural stability. When the heat shrink tubing is exposed to a high temperature environment for a long time, the high temperature accelerates the breakage of the molecular chains inside the heat shrink tubing. At the same time, some polymers undergo a "cross-linking reaction" under the action of high temperature and oxygen, leading to the aging of the heat shrink tubing. By setting resin microcapsules 21 inside the outer layer 20, the resin microcapsules 21 gradually break down and release antioxidants under high temperature environment. The antioxidants "capture" the free radicals generated in the thermo-oxidative reaction, terminating the chain oxidation. At the same time, it can avoid the failure of traditional antioxidants due to rapid volatilization, thus improving the anti-aging properties of the heat shrink tubing.

[0030] In one optional embodiment, the heat shrink tubing 100 is provided with heat shrink section one 101, heat shrink section two 102 and transition section 103 from left to right. The radius and heat shrink ratio of heat shrink section two 102 are greater than those of heat shrink section one 101. The two ends of the transition section 103 are connected to heat shrink section one 101 and heat shrink section two 102 respectively, and its radius gradually increases from the beginning to the end, so that the two ends of the heat shrink tubing 100 have two different heat shrink ratios. This breaks through the limitations of traditional "single ratio" heat shrink tubing and more accurately adapts to the covering needs of variable diameter and irregularly shaped parts. By setting the transition section 103 with an increasing radius structure, the shrinkage rate is smoothly transitioned from high to low, preventing bulging and wrinkling problems caused by excessive changes in shrinkage rate.

[0031] In an optional embodiment, the thickness of the connection between the transition section 103 and the heat-shrinkable section 101 and the heat-shrinkable section 102 is thicker than that of other areas of the transition section 103. Since the connection between the transition section 103 and the heat-shrinkable section 101 and the heat-shrinkable section 102 is a stress concentration point, the stress is dispersed by thickening, thus preventing the junction from cracking due to excessive stress.

[0032] In one alternative implementation, the ratio of the heat shrinkage ratio of heat shrink section 2 102 to that of heat shrinkage section 101 does not exceed 1:3, which can significantly reduce stress concentration problems caused by differences in shrinkage amplitude.

[0033] Example 2

[0034] like Figure 3As shown, in order to make the heat shrink tubing suitable for humid environments, based on Embodiment 1, annular waterproof protrusions 11 are provided on the inner walls of both ends of the cross-linked polyolefin base layer 10. When the heat shrink tubing is heated and shrunk, the waterproof protrusions 11 directly contact the outer wall of the connector, sealing the connection point between the two and preventing moisture from entering through gaps.

[0035] In an optional embodiment, the hot melt adhesive layer 30 is bonded to the interior of the cross-linked polyolefin base layer 10, and the hot melt adhesive layer 30 is located between the two waterproof protrusions 11, so that the hot melt adhesive layer 30 will not be exposed from both sides of the heat shrink sleeve after hot melting, thus preventing the sealing failure caused by the hot melt adhesive layer 30 coming into contact with water.

[0036] Example 3

[0037] like Figure 4 As shown, in order to make the heat shrink tubing suitable for scenarios with frequent bending and vibration, based on Example 1, a silicone layer 40 is bonded to the inner wall of the cross-linked polyolefin base layer 10. The inner wall of the silicone layer 40 is bonded to the hot melt adhesive layer 30. By setting the silicone layer 40 to absorb external mechanical impact and vibration, the load directly borne by the cross-linked polyolefin base layer 10 is reduced, and fatigue cracking of the substrate caused by long-term vibration is avoided, which significantly improves the service life of the heat shrink tubing in dynamic scenarios.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An anti-aging heat shrink tubing, characterized in that, include: A heat shrink tubing, comprising a cross-linked polyolefin base layer, an outer layer, and a hot melt adhesive layer, wherein the outer layer is disposed on the outside of the cross-linked polyolefin base layer and is integrally formed with the cross-linked polyolefin base layer, the hot melt adhesive layer is bonded to the inner wall of the cross-linked polyolefin base layer, and a plurality of resin microcapsules are disposed inside the outer layer, wherein the resin microcapsules are encapsulated with antioxidants.

2. The anti-aging heat shrink tubing according to claim 1, characterized in that, The heat shrink tubing is provided with heat shrink section one, heat shrink section two and transition section from left to right. The radius and heat shrink ratio of heat shrink section two are greater than those of heat shrink section one. The beginning and end of the transition section are connected to heat shrink section one and heat shrink section two respectively, and its radius gradually increases from beginning to end.

3. The anti-aging heat shrink tubing according to claim 2, characterized in that, The thickness of the connection between the transition section and heat-shrinkable section one and heat-shrinkable section two is greater than that of other areas of the section itself.

4. The anti-aging heat shrink tubing according to claim 2, characterized in that, The ratio of the heat shrink ratio of the second heat shrink section to that of the first heat shrink section does not exceed 1:

3.

5. The anti-aging heat shrink tubing according to claim 1, characterized in that, The cross-linked polyolefin base layer has annular waterproof protrusions on the inner walls of both ends.

6. The anti-aging heat shrink tubing according to claim 5, characterized in that, The hot melt adhesive layer is bonded to the interior of the cross-linked polyolefin base layer, and the hot melt adhesive layer is located between the two waterproof protrusions.

7. The anti-aging heat shrink tubing according to claim 1, characterized in that, The inner wall of the cross-linked polyolefin base layer is bonded with a silicone layer, and the inner wall of the silicone layer is bonded with a hot melt adhesive layer.

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