Production method of hot melt adhesive capable of being laminated and thermally crosslinked and cured

Abstract

According to the invention, the traditional liquid adhesive is abandoned, the environment-friendly and safe hot melt adhesive is used as the adhesive of the composite film, a brand new process and new equipment are adopted, the energy consumption is saved, no three wastes are discharged, and the advantages of excellent weather resistance, simple and mature process, low price and the like of the hot melt adhesive are utilized, so that the transparent back plate meeting the requirements of a double-sided assembly is developed; the price of the transparent back plate in the current market is reduced, jumping type explosion of the double-sided assembly is promoted, and'average-price internet surfing 'is assisted. At present, no special hot melt adhesive exists in the market, resin capable of being coated with a film is thermoplastic, has very low stripping force with base materials such as PET (polyethylene terephthalate) and the like, can be melted, deformed and even separated when the temperature rises to a certain temperature, and cannot be used on a transparent back plate, so that the hot melt adhesive capable of being coated with the film and thermally crosslinked and cured needs to be independently researched and developed; crosslinking curing can occur under the heating condition, the production process is simple and efficient, remarkable innovativeness is achieved, and the national requirement for innovation is met.

Description

technical field [0001] The invention relates to the field of adhesive tape production, in particular to a production method of a film-coating and thermally cross-linked and solidified hot-melt adhesive. Background technique [0002] With the popularity of double-sided cells and the demand for cost reduction in domestic and foreign markets, especially the special exemption for double-sided modules in the US Act 201, investors in photovoltaic power plants have a strong and urgent demand for double-sided modules. Therefore, photovoltaic modules Manufacturers have announced to speed up the development and demonstration of double-sided modules, because one of the key raw materials for double-sided modules requires the use of transparent backsheets, so backsheet raw material manufacturers have also stepped up efforts to develop transparent backsheets for double-sided modules , but since the current transparent backplane is 2 to 3 times the price of a conventional backplane, it bas...

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Problems solved by technology

[0002] With the popularity of double-sided cells and the demand for cost reduction in domestic and foreign markets, especially the special exemption for double-sided modules in the US Act 201, investors in photovoltaic power plants have a strong and urgent demand for double-sided modules. Therefore, photovoltaic modules Manufacturers have announced to speed up the development and demonstration of double-sided modules, because one of the key raw materials for double-sided modules requires the use of transparent backsheets, so backsheet raw material manufacturers have also stepped up efforts to develop transparent backsheets for double-sided modules , but since the current transparent backplane is 2 to 3 times the price of a conventional backplane, it basically offsets the gain generated by the backside power generation of the bifacial module, making it impossible to apply it in large quantities. Therefore, it is necessary to change the existing production process and Technology and raw materials, find another way, use new technologies, new processes and new materials to produce transparent backplanes, so as to help realize "parity Internet access" as soon as possible

[0003] At present, the production method of the transparent backboard on the market adopts the coating process to compound the layers of the backboard. The key raw material of the coating technology is the use of special adhesives containing chemical solvents. This special adhesive has high technical content and is difficult to produce. There are few manufacturers, the price is very expensive, and the chemical solvents in the adhesive are usually flammable and explosive dangerous chemicals, which need to be stored, transported, used, etc. in accordance with the relevant regulations of hazardous chemicals. It is easy to produce "three wastes" for the collection and treatment of equipment and facilities, and it is necessary to provide necessary protection and protection for on-site employees. Therefore, this set of production equipment is usually large in size, high in energy consumption, large in floor space, and high in operating costs. Therefore, it is of practical significance to develop environmentally friendly transparent backsheets. Using solvent-free hot melt adhesives instead of traditional chemical solvent-based adhesives is not only non-hazardous chemicals, but also produces no "three wastes". The production process is also simple and efficient, completely different Compared with the traditional coating composite process, it has originality and novelty, and is low in price and excellent in performance. It has strong competitiveness and can quickly seize the market

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