A self-healing optical cable

Abstract

The application discloses a self-repairing optical cable, which comprises a cable core, an outer sheath and a self-repairing component, wherein the self-repairing component comprises microcapsule A and microcapsule B; the microcapsule A comprises a capsule shell A and a base glue; the base glue comprises epoxy acrylate resin, acrylic modified epoxy resin oligomer, polyurethane prepolymer, filler, accelerator and stabilizer; the microcapsule B comprises a capsule shell B and a hardening agent; the hardening agent comprises epoxy acrylate resin, tackifying resin, plasticizer, filler, polyurethane curing agent, peroxide and stabilizer; the weight ratio of the base glue and the hardening agent is 100:7-100:15; the base glue of the microcapsule A and the hardening agent of the microcapsule B can be glued after mixing at normal temperature, and have the advantages of low hardness and fast curing speed; after a wound appears on the outer sheath of the optical cable, the base glue and the hardening agent are released, and the repair of the outer sheath can be completed without applying additional environmental conditions.

Description

Technical Field

[0001] This invention belongs to the field of optical cables, and more specifically, relates to a self-healing optical cable. Background Technology

[0002] With the development of information technology, the demand for communication is increasing, and the demand for optical cables that can be used in harsher environments is also increasing. During transportation, construction, and use, the outer sheath of some optical cables may develop micro-cracks, tears, or even breakage due to external environmental factors or human operation. Over long-term use, the outer sheath will also age and become damaged. If it is not repaired in time, it will affect the normal use of the optical cable, reduce its service life, or even directly lead to the scrapping of the optical cable.

[0003] Currently, the materials used in optical cables are often unable to self-repair once damaged by external forces (including microcracks, larger tears that do not penetrate the outer sheath, tears that penetrate the outer sheath, and breakage into two pieces). To address this issue, Chinese patent document CN112812438A invented an optical cable with self-healing microcapsules distributed in the sheath material. Once damaged by external forces, the repair fluid flowing out of the capsules repairs the microcracks on the surface of the optical cable. However, if the outer sheath has a large break, a through tear, or if the external force causing the damage persists, the fluid flowing out of the capsules alone cannot coat or fill the damaged area, nor can it adhere to the damaged area, leading to incomplete repair or even repair failure. Summary of the Invention

[0004] In view of the above-mentioned defects or improvement needs of the existing technology, the present invention provides a self-healing optical cable, wherein the adhesive of microcapsule A and the hardener of microcapsule B can effectively repair the outer sheath when damage such as microcracks and large tears are formed, and prevent the damage from expanding further.

[0005] To achieve the above objectives, according to the present invention, a self-healing optical cable is provided, comprising a cable core and an outer sheath enclosing the cable core, characterized in that...

[0006] It also includes a self-healing component comprising a plurality of microcapsules uniformly dispersed on the outer sheath, the microcapsules being divided into microcapsules A and microcapsules B, and

[0007] For the microcapsule A, it includes capsule shell A and the adhesive inside capsule shell A, and the adhesive comprises, by mass percentage: 30% to 60% epoxy acrylate resin, 10% to 20% acrylic modified epoxy resin oligomer, 20% to 40% polyurethane prepolymer, 9% to 20% filler, 0.5% to 2% accelerator, and 0.5% to 1% stabilizer, and the sum of the mass percentages of all components of the adhesive is 100%;

[0008] For the microcapsule B, it includes a capsule shell B and a hardener inside the capsule shell B, and the components of the hardener by mass percentage include: 20% to 50% epoxy acrylate resin, 10% to 20% tackifying resin, 10% to 20% plasticizer, 9% to 20% filler, 4% to 15% polyurethane curing agent, 10% to 15% peroxide, and 0.5% to 1% stabilizer, and the sum of the mass percentages of all components of the hardener is 100%;

[0009] The weight ratio of the gum of microcapsule A to the hardener of microcapsule B is 100:7 to 100:15.

[0010] Preferably, the self-healing component further includes a water-blocking structure disposed between the cable core and the outer sheath. The water-blocking structure is a water-blocking tape and / or water-blocking powder, so that the AB glue formed by the mixture of the adhesive flowing out from the rupture of microcapsule A and the hardener flowing out from the rupture of microcapsule B remains at the wound of the outer sheath, so that the AB glue fully fills the wound and physically bonds the outer sheath after the AB glue hardens, thereby repairing the outer sheath.

[0011] Preferably, the acrylic acid modified epoxy resin oligomer has a molecular weight of 600-1200 and a molecular length ≤4.2nm.

[0012] Preferably, both capsule shell A and capsule shell B contain a dispersant to prevent agglomeration in the sheath material forming the outer sheath;

[0013] The dispersant is a surfactant made of quaternary ammonium salt compound.

[0014] Preferably, the sheath material forming the outer sheath comprises 90% to 95% polyethylene and 5% to 10% polylactic acid by mass percentage, and the sum of the mass percentages of the two is 100%.

[0015] Preferably, the capsule shells of microcapsule A and microcapsule B both comprise graphene and hexamethoxymethyl melamine resin, and the mass ratio of graphene to hexamethoxymethyl melamine resin is 0.1:100-7:100.

[0016] Preferably, microcapsules A and B are premixed in the sheath material that forms the outer sheath, and then extruded together with the sheath material.

[0017] Preferably, the extrusion temperature of the extruded material is 150℃~180℃.

[0018] Preferably, the wall thickness of the outer sheath is 1mm to 2.6mm;

[0019] The outer diameter of microcapsule A is 0.2 mm to 1 mm;

[0020] The outer diameter of microcapsule B is 0.2 mm to 1 mm.

[0021] Preferably, the filler for microcapsule A and microcapsule B is one or more of titanium dioxide, talc, or calcium carbonate.

[0022] The stabilizer for microcapsule A and microcapsule B is one or more of butylene terephthalate, polyethylene terephthalate resin, or p-hydroxyanisole.

[0023] The promoter of microcapsule A is one or more combinations of triphenylphosphine or N,N-dimethyl-p-toluidine.

[0024] The plasticizer for microcapsule B is one or more of benzoate or di(2-ethylhexyl) phthalate.

[0025] The peroxide of microcapsule B is benzoyl peroxide.

[0026] The thickening resin of microcapsule B is an aliphatic hydrocarbon resin.

[0027] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:

[0028] 1) The present invention provides a self-healing optical cable in which the adhesive of microcapsule A and the hardener of microcapsule B can bond together at room temperature. Using an epoxy resin material with a polyurethane foam system, when the outer sheath of the optical cable is damaged, the adhesive released from the rupture of microcapsule A and the hardener released from the rupture of microcapsule B mix to form AB adhesive. This AB adhesive fully coats and fills the wound, and the curing speed is matched to the degree of foaming, which is adaptively adjusted according to the damaged area. During curing, the polyurethane foam system provides pressure to the damaged area of ​​the outer sheath. After the AB adhesive cures, it can repair the outer sheath, ensuring the repair effect without the need for additional environmental conditions. It is suitable for microcracks, tears, breaks, and other wounds.

[0029] 2) Preferred embodiment: In the self-healing optical cable of the present invention, a water-blocking structure is arranged between the outer sheath and the cable core. It can block water to provide initial protection for the cable core, assist adhesive in filling the damaged area, effectively prevent AB adhesive from flowing between the cable core and the outer sheath, control the flow of polyurethane foam adhesive to the outside of the optical cable, realize the self-repair of the optical cable through-damage, avoid affecting the shape of the outer sheath and reducing the mechanical properties of the optical cable, especially to prevent it from flowing into the inside of the optical cable and foaming, which would cause the optical fiber to be squeezed. Attached Figure Description

[0030] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0031] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein: 1-cable core; 2-outer sheath; 3-microcapsule; 4-water-blocking structure. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0033] Reference Figure 1 A self-healing optical cable includes a cable core 1 and an outer sheath 2 that wraps around the cable core 1. The cable core 1 can be a cable core 1 with an existing structure, such as the cable core 1 of a central tube optical cable or the cable core 1 of a stranded optical cable. The outer sheath 2 wraps around the cable core 1 and provides overall protection for the optical cable used for information transmission.

[0034] The self-healing optical cable also includes a self-healing component, which includes a plurality of microcapsules 3 uniformly dispersed on the outer sheath 2. The microcapsules 3 are divided into microcapsules A and microcapsules B for repairing the outer sheath 2.

[0035] For the microcapsule A, it includes capsule shell A and the adhesive inside capsule shell A, and the adhesive comprises, by mass percentage: 30% to 60% epoxy acrylate resin, 10% to 20% acrylic modified epoxy resin oligomer, 20% to 40% polyurethane prepolymer, 9% to 20% filler, 0.5% to 2% accelerator, and 0.5% to 1% stabilizer, and the sum of the mass percentages of all components of the adhesive is 100%.

[0036] Among the components of microcapsule A:

[0037] Epoxy acrylate resin is one of the main components in adhesives (AB glue formed by mixing the resin and hardener, which cures to form an adhesive). It plays a bonding role. Using 30%–60% epoxy acrylate resin can control the appropriate hardness of the adhesive after curing. Excessive hardness of the adhesive will have the following effects on its use and performance: 1. Reduced bond strength. Because an overly hard adhesive cannot fully penetrate and wet the bonded surfaces, the bond strength is reduced. 2. Increased brittleness: Adhesives with excessive hardness tend to become brittle and prone to breakage or cracking, which reduces the impact resistance and tensile strength of the resin adhesive. Conversely, adhesives with insufficient hardness are prone to wear and detachment.

[0038] Polyurethane prepolymer is one of the main components of adhesives, playing a bonding role. Using 20% ​​to 40% polyurethane prepolymer can improve the adhesive strength of the adhesive. When polyurethane prepolymer cures, it absorbs moisture from the air and expands when exposed to air. For different types of wounds, it adaptively fills and cures according to the degree of exposure and the damaged area.

[0039] Acrylic-modified epoxy resin oligomers are one of the main components of adhesives. Using 10% to 20% acrylic-modified epoxy resin oligomers can increase the viscosity of AB glue.

[0040] The filler is used to improve the size stability of microcapsule A and as a viscosity modifier. The use of 9% to 20% filler ensures the toughness of microcapsule A during use.

[0041] The role of accelerators is to increase the reaction rate. Using 0.5% to 2% accelerators allows the adhesive and hardener to react quickly, while too little or too much accelerator reduces the degree of optimization for rate improvement.

[0042] The role of stabilizers is to increase the stability of this adhesive. Using 0.5% to 1% stabilizer can achieve the best stability of this adhesive.

[0043] Among the components of microcapsule A, the most important components are epoxy acrylate resin, acrylic modified epoxy resin oligomer, and polyurethane prepolymer, which play the main repair role.

[0044] For the microcapsule B, it includes a capsule shell A and a hardener inside the capsule shell A, and the components of the hardener by mass percentage include: 20% to 50% epoxy acrylate resin, 10% to 20% tackifying resin, 10% to 20% plasticizer, 9% to 20% filler, 4% to 15% polyurethane curing agent, 10% to 15% peroxide, and 0.5% to 1% stabilizer, and the sum of the mass percentages of all components of the hardener is 100%.

[0045] Among the components of microcapsule B:

[0046] Epoxy acrylate resin is one of the main components of adhesives. Using 20% ​​to 50% of it can control the adhesive to a suitable hardness.

[0047] The tackifying resin can increase the viscosity of the hardener, reducing the risk of the hardener flowing too fast after the microcapsule B ruptures, which would prevent it from completely filling the crack.

[0048] The role of plasticizers is to improve the plasticity of hardeners. Using 10% to 20% is to optimize the flexibility of adhesives.

[0049] The filler is used to improve the dimensional stability of microcapsule B and as a viscosity modifier. Using 9% to 20% filler ensures the toughness of microcapsule B during use.

[0050] The main component of polyurethane curing agent is isocyanate oligomer, which is used to solidify AB glue. Using 4% to 15% can increase the solidification rate of AB glue.

[0051] Peroxides, used as crosslinking agents for adhesive components, can increase the crosslinking speed of unsaturated resins when used at 10%–15%.

[0052] Stabilizers increase the stability of hardeners; using 0.5% to 1% stabilizer is optimal.

[0053] Among these components, the most important one is epoxy acrylate resin, which is one of the main components of the adhesive.

[0054] The weight ratio of the gum of microcapsule A to the hardener of microcapsule B is 100:7 to 100:15.

[0055] When the outer sheath 2 is damaged, the microcapsules A and B, which are evenly distributed in the outer sheath 2, will break when microcracks appear in the outer sheath 2. The adhesive and the hardener will then mix to form AB adhesive.

[0056] The AB adhesive provided by this invention employs a polyurethane foaming system, which can adaptively adjust the foaming degree according to the exposed area of ​​damage, thereby filling the damaged area. It also matches the curing speed, providing pressure for the AB adhesive to cure at the damaged area. Therefore, even with large damage or when the external force causing the damage has not been eliminated (e.g., twisted or bent optical cables), it still achieves good repair results. Specifically:

[0057] When microcracks appear, the AB adhesive, after forming, can fill the microcracks through capillary suction. During the curing process, the damaged area is small, the adhesive hardly comes into contact with the outside environment, and the water absorption and swelling phenomenon is slight. This provides a certain lateral pressure for the adhesive to cure, thereby improving the bonding effect and physically bonding the microcracks. This prevents the microcracks from expanding further and causing irreversible damage to the optical cable, thus effectively repairing the microcracks. Microcracks are a unique morphological feature of polymers. They are elongated, fine grooves perpendicular to the principal stress direction that appear at defects or weak points in the material under tensile stress. The following situations did not occur with microcracks: large cracks that did not penetrate the outer sheath 2, cracks that penetrate the outer sheath 2, or the outer sheath 2 breaking into two pieces.

[0058] When the outer sheath 2 is significantly damaged, resulting in a large crack, the microcapsules A and B at the damaged area rupture. The resulting AB glue, formed by the mixture of the adhesive and the hardener, has a large contact area with air, allowing it to absorb water and foam upon exposure. The polyurethane foam system exhibits significant water absorption and expansion, fully filling the crack with the effective components of the self-healing microcapsules. The AB glue effectively fills the wound, achieving a large-area wound repair effect: on the one hand, it pushes the AB glue to fill the wound; on the other hand, it provides sufficient pressure for the wound to cure, thereby pressing the AB glue tightly against the fracture surface, reducing interface separation, and thus improving the bonding effect. It adaptively repairs damage and is suitable for situations where the sheath 2 is deformed by external forces such as twisting and bending. In contrast, conventional self-healing materials can flow out and be drained by gravity, providing localized filling, but cannot fill large cracks on the repaired object, and cannot adhere tightly to the edges of large cracks. The AB glue formed at the crack in this invention has a more thorough cross-linking between the adhesive and the hardener, allowing for a tighter bond to the edges of the crack. When this adhesive and the hardener are mixed, a cross-linking reaction occurs, forming a strong structural adhesive force. Specifically, the molecular chains form a three-dimensional network structure, and after a certain period of time, the wound exhibits a firm structural adhesive state.

[0059] Furthermore, the self-healing component also includes a water-blocking structure 4 disposed between the cable core 1 and the outer sheath 2. The water-blocking structure 4 is a water-blocking tape and / or water-blocking powder, allowing the AB adhesive formed by the mixture of the adhesive released from the rupture of microcapsule A and the hardener released from the rupture of microcapsule B to remain at the wound site of the outer sheath 2. This ensures the AB adhesive fully fills the wound, and after the AB adhesive hardens, it physically bonds to the outer sheath 2, thus repairing the wound and extending the service life of the optical cable. The water-blocking structure 4, positioned between the outer sheath 2 and the cable core 1, also blocks water, providing initial protection for the cable core 1. Moreover, the water-blocking structure 4 effectively prevents the AB adhesive from flowing between the cable core 1 and the outer sheath 2. If the AB adhesive flows between the cable core 1 and the outer sheath 2 and hardens, it will cause the outer sheath 2 to bulge, reducing the mechanical properties of the outer sheath 2 and the optical cable, and affecting the normal bending of the outer sheath 2. In severe cases, it will affect the communication capability of the optical cable. This solution is applicable not only to wounds of various sizes but also to penetrating wounds, protecting the internal structure of the optical cable from being squeezed by the polyurethane foam adhesive during repair.

[0060] The acrylic-modified epoxy resin oligomer is a low molecular weight prepolymer. This low molecular weight prepolymer has the following advantages: it can increase the adhesion and flexibility of the adhesive, and by adjusting the molecular weight of the oligomer, the viscosity of the AB glue can be changed to ensure that the AB glue is fully filled.

[0061] Furthermore, both capsule shell A and capsule shell B contain a dispersant to prevent agglomeration in the sheath 2 material forming the outer sheath 2. The dispersant is preferably one or a combination of butylene terephthalate, ethylene glycol terephthalate resin, or anisole. The dispersant improves the dispersibility of the microcapsules in the sheath 2 material, preventing agglomeration.

[0062] Furthermore, the sheath 2 material forming the outer sheath 2 comprises 90% to 95% polyethylene and 5% to 10% polylactic acid by mass percentage, and the sum of the mass percentages of the two is 100%. The sheath 2 material uses a polyethylene melt-blended polylactic acid composite material, which ensures the tensile strength and elongation at break of the material while reducing the extrusion temperature.

[0063] Furthermore, the capsule shells of microcapsule A and microcapsule B both comprise graphene and hexamethoxymethyl melamine resin, with a mass ratio of graphene to hexamethoxymethyl melamine resin of 0.1:100-7:100. To adapt to the extrusion temperature of the sheath material 2 and ensure that the effective components are not lost after the microcapsules are premixed and extruded, a capsule shell material with graphene and hexamethoxymethyl melamine resin as its main components was manufactured with reference to US10357752B1.

[0064] Furthermore, after microcapsules A and B are premixed in the sheath 2 material that forms the outer sheath 2, they are extruded together with the sheath 2 material. Therefore, microcapsules A and B are first evenly dispersed in the sheath 2 material, and after being extruded to form the outer sheath 2, they are also evenly dispersed on the outer sheath 2.

[0065] Furthermore, the extrusion temperature of the extruded material is 150℃~180℃ to prevent excessive temperature from damaging the capsule wall of the microcapsules and causing the loss of effective ingredients inside the microcapsules.

[0066] Furthermore, the outer sheath 2 has a wall thickness of 1mm to 2.6mm; the outer diameter of microcapsule A is 0.2mm to 1mm; and the outer diameter of microcapsule B is 0.2mm to 1mm. Microcapsules A and B are densely distributed on and embedded within the outer sheath 2.

[0067] Furthermore, the fillers for microcapsules A and B are one or more of titanium dioxide, talc, or calcium carbonate.

[0068] The stabilizer for microcapsule A and microcapsule B is one or more of butylene terephthalate, polyethylene terephthalate resin, or p-hydroxyanisole.

[0069] The promoter of microcapsule A is one or more combinations of triphenylphosphine or N,N-dimethyl-p-toluidine.

[0070] The plasticizer of microcapsule B is one or more combinations of benzoic acid esters or di(2-ethylhexyl) phthalate. The peroxide of microcapsule B is benzoyl peroxide. The tackifying resin of microcapsule B is an aliphatic hydrocarbon resin.

[0071] The main components of microcapsules A and B of this invention can bond together at room temperature, exhibiting advantages such as low hardness and tight curing. When the outer sheath 2 of the optical cable is damaged, the effective components in the microcapsules are released, allowing for adaptive repair of the outer sheath 2 of the optical cable based on the degree of damage without requiring additional environmental conditions.

[0072] Example 1

[0073] A self-healing optical cable includes a cable core 1 and an outer sheath 2 that wraps the cable core 1, wherein a water-blocking structure 4 is provided between the cable core 1 and the outer sheath 2.

[0074] It also includes a self-healing component, which comprises a plurality of microcapsules uniformly dispersed on the outer sheath 2, the microcapsules being divided into microcapsule A and microcapsule B.

[0075] The outer sheath 2 material comprises 90% polyethylene and 10% polylactic acid by mass percentage, and the sum of their mass percentages is 100%, and:

[0076] For the microcapsule A, it includes capsule shell A and the adhesive inside capsule shell A, and the adhesive comprises, by mass percentage: 60% epoxy acrylate resin, 10% acrylic modified epoxy resin oligomer, 20% polyurethane prepolymer, 9% filler, 0.5% accelerator, and 0.5% stabilizer, and the sum of the mass percentages of all components of the adhesive is 100%.

[0077] For the microcapsule B, it includes a capsule shell B and a hardener inside the capsule shell B, and the components of the hardener by mass percentage include: 50% epoxy acrylate resin, 16.5% tackifying resin, 10% plasticizer, 9% filler, 4% polyurethane curing agent, 10% peroxide, and 0.5% stabilizer, and the sum of the mass percentages of all components of the hardener is 100%.

[0078] The weight ratio of the adhesive of microcapsule A to the hardener of microcapsule B is 100:7.

[0079] Example 2

[0080] A self-healing optical cable includes a cable core 1 and an outer sheath 2 that wraps the cable core 1, wherein a water-blocking structure 4 is provided between the cable core 1 and the outer sheath 2.

[0081] It also includes a self-healing component, which comprises a plurality of microcapsules uniformly dispersed on the outer sheath 2, the microcapsules being divided into microcapsules A and microcapsules B;

[0082] The outer sheath 2 material comprising the outer sheath 2 comprises 92% polyethylene and 8% polylactic acid by mass percentage, the sum of the mass percentages of the two is 100%, and:

[0083] For the microcapsule A, it includes capsule shell A and the adhesive inside capsule shell A, and the adhesive comprises, by mass percentage: 45% epoxy acrylate resin, 10% acrylic modified epoxy resin oligomer, 30% polyurethane prepolymer, 13% filler, 1.2% accelerator, and 0.8% stabilizer, and the sum of the mass percentages of all components of the adhesive is 100%.

[0084] For the microcapsule B, it includes a capsule shell B and a hardener inside the capsule shell B, and the components of the hardener by mass percentage include: 40% epoxy acrylate resin, 10% tackifying resin, 12% plasticizer, 20% filler, 5% polyurethane curing agent, 12.2% peroxide, and 0.8% stabilizer, and the sum of the mass percentages of all components of the hardener is 100%.

[0085] The weight ratio of the adhesive of microcapsule A to the hardener of microcapsule B is 100:15.

[0086] Example 3

[0087] A self-healing optical cable includes a cable core 1 and an outer sheath 2 that wraps the cable core 1, wherein a water-blocking structure 4 is provided between the cable core 1 and the outer sheath 2.

[0088] It also includes a self-healing component, which comprises a plurality of microcapsules uniformly dispersed on the outer sheath 2, the microcapsules being divided into microcapsule A and microcapsule B.

[0089] The outer sheath 2 material comprises 95% polyethylene and 5% polylactic acid by mass percentage, and the sum of their mass percentages is 100%, and:

[0090] For the microcapsule A, it includes capsule shell A and the adhesive inside capsule shell A, and the adhesive comprises the following components by mass percentage: 30% epoxy acrylate resin, 17% acrylic modified epoxy resin oligomer, 40% polyurethane prepolymer, 10% filler, 2% accelerator, and 1% stabilizer, and the sum of the mass percentages of all components of the adhesive is 100%.

[0091] For the microcapsule B, it includes a capsule shell B and a hardener inside the capsule shell B, and the components of the hardener by mass percentage include: 20% epoxy acrylate resin, 10% tackifying resin, 20% plasticizer, 19% filler, 15% polyurethane curing agent, 15% peroxide, and 1% stabilizer, then the sum of the mass percentages of all components of the hardener is 100%.

[0092] The weight ratio of the adhesive of microcapsule A to the hardener of microcapsule B is 100:10.

[0093] Example 4

[0094] A self-healing optical cable includes a cable core 1 and an outer sheath 2 that wraps the cable core 1, wherein a water-blocking structure 4 is provided between the cable core 1 and the outer sheath 2.

[0095] It also includes a self-healing component, which comprises a plurality of microcapsules uniformly dispersed on the outer sheath 2, the microcapsules being divided into microcapsules A and microcapsules B;

[0096] The outer sheath 2 material comprises 95% polyethylene and 5% polylactic acid by mass percentage, and the sum of their mass percentages is 100%, and:

[0097] For the microcapsule A, it includes capsule shell A and the adhesive inside capsule shell A, and the adhesive comprises, by mass percentage: 30% epoxy acrylate resin, 20% acrylic modified epoxy resin oligomer, 28% polyurethane prepolymer, 20% filler, 1.5% accelerator, and 0.5% stabilizer, and the sum of the mass percentages of all components of the adhesive is 100%.

[0098] For the microcapsule B, it includes a capsule shell B and a hardener inside the capsule shell B, and the components of the hardener by mass percentage include: 26% epoxy acrylate resin, 20% tackifying resin, 15% plasticizer, 15% filler, 10% polyurethane curing agent, 13% peroxide, and 1% stabilizer, and the sum of the mass percentages of all components of the hardener is 100%.

[0099] The weight ratio of the adhesive of microcapsule A to the hardener of microcapsule B is 100:8.

[0100] Example 5

[0101] A self-healing optical cable includes a cable core 1 and an outer sheath 2 that wraps the cable core 1, wherein a water-blocking structure 4 is provided between the cable core 1 and the outer sheath 2.

[0102] It also includes a self-healing component, which comprises a plurality of microcapsules uniformly dispersed on the outer sheath 2, the microcapsules being divided into microcapsules A and microcapsules B;

[0103] The outer sheath 2 material comprising the outer sheath 2 comprises 92% polyethylene and 8% polylactic acid by mass percentage, the sum of the mass percentages of the two is 100%, and:

[0104] For the microcapsule A, it includes capsule shell A and the adhesive inside capsule shell A, and the adhesive comprises, by mass percentage: 40% epoxy acrylate resin, 15% acrylic modified epoxy resin oligomer, 25% polyurethane prepolymer, 18% filler, 1.5% accelerator, and 0.5% stabilizer, and the sum of the mass percentages of all components of the adhesive is 100%.

[0105] For the microcapsule B, it includes a capsule shell B and a hardener inside the capsule shell B, and the components of the hardener by mass percentage include: 35% epoxy acrylate resin, 12% tackifying resin, 10% plasticizer, 18% filler, 12.4% polyurethane curing agent, 12% peroxide, and 0.6% stabilizer, and the sum of the mass percentages of all components of the hardener is 100%.

[0106] The weight ratio of the adhesive of microcapsule A to the hardener of microcapsule B is 100:12.

[0107] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A self-healing optical cable, comprising a cable core and an outer sheath enclosing the cable core, characterized in that, It also includes a self-healing component comprising a plurality of microcapsules uniformly dispersed on the outer sheath, the microcapsules being divided into microcapsules A and microcapsules B, and For the microcapsule A, it includes capsule shell A and the adhesive inside capsule shell A, and the adhesive comprises, by mass percentage: 30% to 60% epoxy acrylate resin, 10% to 20% acrylic modified epoxy resin oligomer, 20% to 40% polyurethane prepolymer, 9% to 20% filler, 0.5% to 2% accelerator, and 0.5% to 1% stabilizer, and the sum of the mass percentages of all components of the adhesive is 100%; For the microcapsule B, it includes a capsule shell B and a hardener inside the capsule shell B, and the components of the hardener by mass percentage include: 20% to 50% epoxy acrylate resin, 10% to 20% tackifying resin, 10% to 20% plasticizer, 9% to 20% filler, 4% to 15% polyurethane curing agent, 10% to 15% peroxide, and 0.5% to 1% stabilizer, and the sum of the mass percentages of all components of the hardener is 100%; The weight ratio of the gum of microcapsule A to the hardener of microcapsule B is 100:7 to 100:

15.

2. The self-healing optical cable according to claim 1, characterized in that, The self-healing component also includes a water-blocking structure disposed between the cable core and the outer sheath. The water-blocking structure is a water-blocking tape and / or water-blocking powder, so that the AB glue formed by the mixture of the adhesive flowing out from the rupture of microcapsule A and the hardener flowing out from the rupture of microcapsule B remains at the wound of the outer sheath, so that the AB glue fully fills the wound. After the AB glue hardens, it physically bonds to the outer sheath to play a repairing role.

3. The self-healing optical cable according to claim 1, characterized in that, The acrylic-modified epoxy resin oligomer has a molecular weight of 600-1200 and a molecular length ≤4.2nm.

4. The self-healing optical cable according to claim 1, characterized in that, Both capsule shell A and capsule shell B contain a dispersant to prevent agglomeration in the sheath material that forms the outer sheath; The dispersant is a surfactant made of quaternary ammonium salt compound.

5. A self-healing optical cable according to claim 1, characterized in that, The sheath material forming the outer sheath comprises 90% to 95% polyethylene and 5% to 10% polylactic acid by mass percentage, and the sum of the mass percentages of the two is 100%.

6. A self-healing optical cable according to claim 1, characterized in that, The capsule shells of microcapsule A and microcapsule B both comprise graphene and hexamethoxymethyl melamine resin, and the mass ratio of graphene to hexamethoxymethyl melamine resin is 0.1:100-7:

100.

7. A self-healing optical cable according to claim 1, characterized in that, Microcapsules A and B are premixed in the sheath material that forms the outer sheath, and then extruded together with the sheath material.

8. A self-healing optical cable according to claim 7, characterized in that, The extrusion temperature of the sheath material is 150℃~180℃.

9. A self-healing optical cable according to claim 1, characterized in that, The wall thickness of the outer sheath is 1mm to 2.6mm; The outer diameter of microcapsule A is 0.2 mm to 1 mm; The outer diameter of microcapsule B is 0.2 mm to 1 mm.

10. A self-healing optical cable according to claim 1, characterized in that, The fillers for microcapsules A and B are one or more of titanium dioxide, talc, or calcium carbonate. The stabilizer for microcapsule A and microcapsule B is one or more of butylene terephthalate, ethylene terephthalate resin, or p-hydroxyanisole. The promoter of microcapsule A is one or more combinations of triphenylphosphine or N,N-dimethyl-p-toluidine; The plasticizer for microcapsule B is one or more of benzoate or di(2-ethylhexyl) phthalate; The peroxide of microcapsule B is benzoyl peroxide; The thickening resin of microcapsule B is an aliphatic hydrocarbon resin.

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