阅读说明：本技术 一种环保型耐候光伏电缆 (Environment-friendly weather-proof photovoltaic cable ) 是由 胡宏生 张家文 毕亮亮 徐志敏 高健 巫春生 于 2020-07-13 设计创作，主要内容包括：本发明公开了一种环保型耐候光伏电缆,属于光伏组件技术领域。本发明研制的产品包括80-100份线性低密度聚乙烯,20-30份聚氨酯,8-10份四丁基硫酸氢铵,3-5份金属硫化物,2-3份阻燃剂,3-5份增塑剂,2-5份润滑剂。另外,还可以添加线性低密度聚乙烯质量1-10％的填料；所述填料为海泡石；所述海泡石层间嵌入有纳米二氧化钛,且所述海泡石分子结构中,至少部分镁离子被氢离子取代。其中,聚氨酯选用聚氨酯弹性体。本发明所得产品具有优异的耐候性能,可有效延长产品的使用寿命。(The invention discloses an environment-friendly weather-resistant photovoltaic cable, and belongs to the technical field of photovoltaic modules. The product developed by the invention comprises 80-100 parts of linear low-density polyethylene, 20-30 parts of polyurethane, 8-10 parts of tetrabutylammonium hydrogen sulfate, 3-5 parts of metal sulfide, 2-3 parts of flame retardant, 3-5 parts of plasticizer and 2-5 parts of lubricant. In addition, a filler with the mass of 1-10% of that of the linear low-density polyethylene can be added; the filler is sepiolite; nano titanium dioxide is embedded between the sepiolite layers, and in the molecular structure of the sepiolite, at least part of magnesium ions are replaced by hydrogen ions. Wherein the polyurethane is polyurethane elastomer. The product obtained by the invention has excellent weather resistance, and the service life of the product can be effectively prolonged.)

1. The environment-friendly weather-resistant photovoltaic cable is characterized by comprising the following raw materials in parts by weight:

80-100 parts of linear low-density polyethylene, 20-30 parts of polyurethane, 8-10 parts of tetrabutylammonium hydrogen sulfate, 3-5 parts of metal sulfide, 2-3 parts of flame retardant, 3-5 parts of plasticizer and 2-5 parts of lubricant.

2. The environment-friendly weather-resistant photovoltaic cable as claimed in claim 1, further comprising a filler in an amount of 1-10% by mass of the linear low density polyethylene; the filler is sepiolite.

3. The environment-friendly weather-resistant photovoltaic cable as claimed in claim 2, wherein nano titanium dioxide is embedded between the sepiolite layers.

4. The environment-friendly weather-resistant photovoltaic cable as claimed in any one of claims 2 or 3, wherein the sepiolite has a molecular structure in which at least part of magnesium ions are replaced by hydrogen ions.

5. The environment-friendly weather-resistant photovoltaic cable as claimed in claim 1, wherein the polyurethane is a polyurethane elastomer.

6. The environment-friendly weather-resistant photovoltaic cable as claimed in claim 5, wherein the polyurethane elastomer is any one of a cast polyurethane elastomer, a compound polyurethane elastomer and a thermoplastic polyurethane elastomer.

7. The environment-friendly weather-resistant photovoltaic cable as claimed in claim 1, wherein the metal sulfide is any one of sodium sulfide, potassium sulfide, zinc sulfide, copper sulfide, ferrous sulfide, iron sulfide, calcium sulfide, cobalt sulfide, manganese sulfide and magnesium sulfide.

8. The environment-friendly weather-resistant photovoltaic cable as claimed in claim 1, wherein the flame retardant is any one of tributyl phosphate, tricresyl phosphate or dibromomethane.

9. The environment-friendly weather-resistant photovoltaic cable according to claim 1, wherein the plasticizer is any one of di-n-zinc phthalate, dibutyl phthalate or dimethyl phthalate.

10. The environment-friendly weather-resistant photovoltaic cable as claimed in claim 1, wherein the lubricant is any one of magnesium stearate, zinc stearate and calcium stearate.

Technical Field

The invention relates to the technical field of photovoltaic modules, in particular to an environment-friendly weather-resistant photovoltaic cable.

Background

Electric power is the most important energy form used in modern industry, and in order to improve the environmental protection and the economical efficiency of electric power energy, the development and the application of novel clean energy are explored in all countries in the world. Forms of clean energy that have been developed and utilized by human beings include solar energy, wind energy, biological energy, water energy, geothermal energy, hydrogen energy, and the like. The solar energy and the wind energy are favored by all energy high-tech enterprises due to the minimum harm to the environment in the development process and are rapidly developed. The development of solar energy mainly comprises two technical routes of photovoltaic technology and photothermal technology, wherein the development of photovoltaic power generation technology is the most rapid. In order to promote the application of clean energy, the installed capacity of the photovoltaic power generation in China is large, and the installed capacity is also a source of many photovoltaic technology enterprises.

In China, most of large-scale photovoltaic power stations are located in western regions with good photo-thermal conditions but rare people, large-scale distributed photovoltaic panels need to be arranged in the photovoltaic power stations, and electric energy generated on the photovoltaic panels distributed through wires and cables is collected and transmitted to a power grid. Since the photovoltaic power station is usually located outdoors, the performance of the photovoltaic equipment using the cable is much better than that of the ordinary cable. The cable is required to cope with severe natural conditions such as strong ultraviolet rays, wind, heat, rainwater and the like, and is also required to prevent damage of wild animals to the cable, and the requirements of the photovoltaic equipment cable on the tensile property, the flexibility and the aging resistance of the cable sheath material are particularly outstanding. Most cable materials on the market can meet the requirements on certain properties, but cable sheath materials with outstanding comprehensive properties are relatively few.

The tensile strength and flexibility of the cable can be improved by adding fiber materials besides selecting special polymer base materials, and the conventional fiber materials comprise various organic fibers and inorganic fibers such as ceramic fibers, glass fibers, mineral fibers and the like. Although the organic fiber has good compatibility, flexibility and elasticity, the strength of the material is not high, and the improvement on the tensile property of the cable material is limited; the strength of quartz fiber, asbestos fiber and the like in the inorganic fiber is high, but the compatibility with polyolefin and rubber materials is poor, and the weather resistance (thermal stability and ageing resistance) of the prepared cable material is adversely affected.

Therefore, how to prepare the cable which is environment-friendly and has good weather resistance is applicable to the photovoltaic field, and is one of the technical problems to be solved urgently by technical personnel in the field.

Disclosure of Invention

The invention aims to provide an environment-friendly weather-resistant photovoltaic cable, which aims to solve the problem that the weather resistance of a prepared cable material is adversely affected due to poor compatibility between a material added into the photovoltaic cable and a matrix high polymer material in the prior art, so that the service life of a product is affected.

In order to achieve the purpose, the invention provides the following technical scheme:

an environment-friendly weather-resistant photovoltaic cable comprises the following raw materials in parts by weight:

80-100 parts of linear low-density polyethylene, 20-30 parts of polyurethane, 8-10 parts of tetrabutylammonium hydrogen sulfate, 3-5 parts of metal sulfide, 2-3 parts of flame retardant, 3-5 parts of plasticizer and 2-5 parts of lubricant.

Compared with the prior art, the beneficial effect of the above technical scheme is:

(1) according to the technical scheme, polyurethane with good compatibility with linear low-density polyethylene is added into a linear low-density polyethylene system, tetrabutylammonium hydrogen sulfate is used as a phase transfer catalyst, and a compound (sodium sulfide) containing divalent sulfur ions is used for replacing unstable elements in the polyurethane, so that polymer resin is crosslinked to a certain degree; on the other hand, the surface density of the photovoltaic cable material is improved, so that the surface light transmittance of the photovoltaic cable material is effectively reduced, the interference of ultraviolet rays on the inside of the photovoltaic cable material is avoided, and the weather resistance of the product is improved; moreover, due to the existence of the cross-linked network structure, the migration and loss of the flame retardant are effectively avoided, so that the product can always keep good flame retardant performance in the long-term use process;

(2) above-mentioned technical scheme is through adopting linear low density polyethylene resin and polyurethane resin system to blend, carbonyl in the polyurethane structure can form the hydrogen bond effort with between the hydrogen atom of methylene in the polyethylene, and the introduction of polyethylene, can destroy the inside hydrogen bond of polyurethane molecular structure of itself, make the soft section in the polyurethane molecular structure and the hard section in the polyethylene molecular structure organic combination, make both compatibilities promote, moreover, the formation of new hydrogen bond, cooperate with the existence of above-mentioned cross-linking network structure, make the density of the inside macromolecular network of system promote, further avoided the harmful effects of light and heat to product inside and the loss of components such as inside flame retardant, make the weatherability of product and fire resistance keep for a long time.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

An environment-friendly weather-resistant photovoltaic cable comprises the following raw materials in parts by weight:

80-100 parts of linear low-density polyethylene, 20-30 parts of polyurethane, 8-10 parts of tetrabutylammonium hydrogen sulfate, 3-5 parts of metal sulfide, 2-3 parts of flame retardant, 3-5 parts of plasticizer and 2-5 parts of lubricant.

Further, the environment-friendly weather-resistant photovoltaic cable also comprises a filler accounting for 1-10% of the mass of the linear low-density polyethylene; the filler is sepiolite.

Furthermore, nano titanium dioxide is embedded between the sepiolite layers.

Further, in the molecular structure of the sepiolite, at least part of magnesium ions are replaced by hydrogen ions.

According to the technical scheme, the layered sepiolite is treated, so that magnesium ions in the molecular structure of the sepiolite are partially replaced by hydrogen ions, internal pore channels are redistributed, and the porosity of the channels between layers is improved; and then, the nano titanium dioxide is introduced and effectively fixed on the surface and in the pores of the layered structure, so that organic molecular chains in the matrix resin can be wound with the embedded nano titanium dioxide, and the organic molecular chains and the embedded nano titanium dioxide are mutually drawn, and the existence of the nano titanium dioxide and the embedded nano titanium dioxide can generate a strong limiting effect, so that the tear resistance of the product is further improved.

Further, the polyurethane is a polyurethane elastomer.

Further, the polyurethane elastomer is any one of a casting polyurethane elastomer, a mixing polyurethane elastomer and a thermoplastic polyurethane elastomer.

Further, the metal sulfide is any one of sodium sulfide, potassium sulfide, zinc sulfide, copper sulfide, ferrous sulfide, iron sulfide, calcium sulfide, cobalt sulfide, manganese sulfide and magnesium sulfide.

Further, the flame retardant is any one of tributyl phosphate, tricresyl phosphate or dibromomethane.

Further, the plasticizer is any one of di-n-zinc phthalate, dibutyl phthalate or dimethyl phthalate.

Further, the lubricant is any one of magnesium stearate, zinc stearate and calcium stearate.