CN114131875A

CN114131875A - Production process and device of white solar cell packaging EVA (ethylene-vinyl acetate copolymer) co-extrusion adhesive film

Info

Publication number: CN114131875A
Application number: CN202111324100.6A
Authority: CN
Inventors: 蔡书义; 焦华
Original assignee: Zhejiang Sinopoly Materials Co ltd
Current assignee: Zhejiang Sinopoly Materials Co ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-03-04
Anticipated expiration: 2041-11-10
Also published as: CN114131875B

Abstract

The invention discloses a production process and a device of a white solar cell packaging EVA co-extrusion adhesive film, and relates to the technical field of adhesive film production. The invention comprises a buffer chamber, a folding sliding cover and a shunting chamber, wherein the buffer chamber is provided with a sliding notch; the folding sliding cover is arranged on the sliding groove opening and comprises lower sliding pieces and upper sliding pieces, two ends of each upper sliding piece are in sliding fit with two adjacent lower sliding pieces, the lower sliding pieces and the upper sliding pieces are provided with interfaces, and the folding sliding cover is arranged on the sliding groove opening; the shunting chamber is communicated with the cache chamber, a row of connecting blocks are arranged on the side face of the shunting chamber, a connecting frame is installed on each connecting block, an inlet driving device is installed on each connecting frame, each inlet driving device comprises a row of drivers, and each driver is connected with a lower sliding piece or an upper sliding piece through a cross rod. According to the invention, uniform glue feeding is carried out in the buffer chamber, and the phenomenon of accumulation and stagnation of EVA melts at two ends of the rectangular buffer chamber is avoided, so that the stable and uniform glue discharging speed is ensured, and the quality of a glue film is ensured.

Description

Production process and device of white solar cell packaging EVA (ethylene-vinyl acetate copolymer) co-extrusion adhesive film

Technical Field

The invention belongs to the technical field of adhesive film production, and particularly relates to a production process and a device of a white solar cell packaging EVA co-extrusion adhesive film.

Background

If the solar cell is directly exposed to the air, the photoelectric conversion efficiency of the solar cell is rapidly reduced, and the practical value is lost. Therefore, research and development of the encapsulating material for the solar cell are important. In order to achieve the purpose of isolating the solar cell module from the outside, an ethylene-vinyl acetate copolymer (EVA) adhesive film which is transparent, light aging resistant, good in adhesive property, capable of bearing atmospheric changes and elastic is adopted to encapsulate the solar cell, and the solar cell is bonded with upper and lower protective materials to form the solar cell module.

EVA is a typical random macromolecular compound, in its molecular structure, the arrangement of substituent on the molecular chain is irregular, at the same time the configuration of asymmetric carbon atom in the molecular chain is different, and its arrangement is also irregular, so that it is a material with small crystallinity, high polarity and high flexibility, and in addition, it has good wettability when it is heated and melted, and has good flexibility, stress cracking resistance and adhesive property when it is cooled and solidified, so that it is an ideal material for packaging solar cell.

The EVA film forming adopts an extrusion forming process, and the whole production line generally comprises stirring equipment, extrusion equipment, a film pressing device, a trimming unit, and winding and unwinding equipment to complete the procedures of material mixing, feeding, extrusion, calendering, trimming and winding. The factors determining the quality of the finished product are as follows: the raw materials and the formula, the hot-melt extrusion process and the tape casting process are controlled in several aspects, and in the tape casting process, the environmental temperature and humidity are also an important link, and the proper humidity and the stable temperature can reduce the tensile deformation of the film and control the tension of the film.

Wherein, the double-deck membrane head of coextruding is accepting the extruder and is mostly "T" venturi tube, and its long port in "T" venturi tube is connected when crowded membrane head altogether, and there is certain distance in the mouth is extruded to the both sides export distance of its long port, and when it extrudes the work, just there is accumulation EVA fuse-element phenomenon in the both ends department of its long port, influences out matter accurately.

Disclosure of Invention

The invention aims to provide a production process and a device of an EVA (ethylene-vinyl acetate) co-extrusion adhesive film for packaging a white solar cell.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a production process and a device of a white solar cell packaging EVA (ethylene-vinyl acetate) co-extrusion adhesive film, wherein a buffer chamber, a folding sliding cover and a shunting chamber are arranged, and the buffer chamber is provided with a sliding notch; the folding sliding cover is arranged on the sliding groove opening and comprises lower sliding pieces and upper sliding pieces, two ends of each upper sliding piece are in sliding fit with two adjacent lower sliding pieces, the lower sliding pieces and the upper sliding pieces are provided with interfaces, and the folding sliding cover is arranged on the sliding groove opening; the shunting chamber is communicated with the cache chamber, a row of connecting blocks are arranged on the side face of the shunting chamber, a connecting frame is installed on each connecting block, an inlet driving device is installed on each connecting frame, each inlet driving device comprises a row of drivers, and each driver is connected with a lower sliding piece or an upper sliding piece through a cross rod.

Further, the interface is located the middle part of gleitbretter, last slide, and the tip of horizontal pole is connected in the interface, the tip UNICOM hose of interface.

Furthermore, the buffer memory chamber comprises an outer box, the sliding groove opening is formed in the port of the outer box, the lower sliding sheet and the upper sliding sheet are both provided with inwards-concave flanges, the end face of the upper sliding sheet flange is provided with a baffle, and the side face of the baffle is attached to the end face of the lower sliding sheet flange.

Further, the buffer memory room still includes the inner box, and the port of inner box is established to the outer container cover, installs the heat conduction ware in the inner box, and the heat conduction ware includes well section of thick bamboo and outer loop, and the cover is equipped with one row of inner ring on the well section of thick bamboo, connects through the connecting rod between outer loop and the inner ring, and it has the hole to open on the outer loop, connects through the puddler between one row of outer loop, and well section of thick bamboo, outer loop, puddler are that heat conduction material makes.

Furthermore, a heating flow distribution plate is arranged in the flow distribution chamber, the heating flow distribution plate comprises a heating plate, a first flow distribution block and a second flow distribution block, a first hinged support is arranged on the end face of the heating plate, the first flow distribution block and the second flow distribution block are hinged on the first hinged support, two of the flow distribution chamber are provided with stepped grooves, through holes are formed in the heating plate, a supporting rod is matched in each through hole, the end part of each supporting rod is matched in each stepped groove, and a heater is arranged in each stepped groove;

the side surface gap adjuster of the shunting chamber is characterized in that an output end of the gap adjuster is provided with a driving rod, the end part of the driving rod extends into the shunting chamber, the driving rod is provided with two connecting ends, and the two connecting ends are respectively connected to the first shunting block and the second shunting block.

Furthermore, the driving rod comprises an outer sleeve rod and an inner supporting rod, the inner supporting rod is arranged on the outer sleeve rod, the end part of the inner supporting rod penetrates through a hole in the second shunting block and is hinged with the first shunting block, and the outer sleeve rod is hinged with the second shunting block.

Furthermore, a triangular notch is formed in the side face of the first shunt block, a second hinged support is arranged in the triangular notch, the end portion of the inner support rod is hinged to the second hinged support, the outer sleeve rod is a sleeve rod with a radial section in a C shape, the end portion of the outer sleeve rod is hinged to the second shunt block, the second shunt block is provided with a rectangular opening, and a rubber sleeve is arranged in the rectangular opening.

Furthermore, the shunting chamber and the buffer chamber are arranged in pairs, a film outlet nozzle is detachably arranged at the port of the shunting chamber, a convection nozzle is arranged on the film outlet nozzle, and the two pairs of the convection nozzles are arranged oppositely.

Furthermore, the film outlet nozzle is provided with an inclined plane, the convection nozzle is arranged on the inclined plane, the film outlet nozzle is provided with a glue outlet cavity, the convection nozzle is communicated with the glue outlet cavity, and the glue outlet cavity is provided with a sealing ring;

the film outlet nozzle is provided with an installation plate which is provided with a screw hole.

A production process of a white solar cell packaging EVA co-extrusion adhesive film uses the EVA co-extrusion adhesive film production device to produce an adhesive film:

wherein, the mass content of the white layer EVA is as follows:

ethylene-vinyl acetate copolymer: 91-91.55;

triallyl isocyanurate: 0.1-0.15;

2-ethylhexyl tert-butylperoxycarbonate: 0.6-0.8;

3- (methacryloyloxy) propyltrimethoxysilane: 0.1-0.2;

bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate: 0.1-0.15;

titanium dioxide: 7.5-8.5;

the mass content of transparent layer EVA:

ethylene-vinyl acetate copolymer: 98.1-98.65;

0.2-0.3 parts of triallyl isocyanurate;

ethoxylated trimethylolpropane triacrylate: 0.1-0.15;

2-ethylhexyl tert-butylperoxycarbonate: 0.8-1.0;

3- (methacryloyloxy) propyltrimethoxysilane: 0.1-0.2;

bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate: 0.1-0.15;

n-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate: 0.05-0.1.

When the materials in the mass portion ratio are used for heating and extruding, the materials used by the transparent layer EVA are uniformly mixed, poured into a screw extruder, the materials used by the white layer EVA are uniformly mixed, and poured into another screw extruder;

and simultaneously opening two screw extruders, respectively extruding the two screw extruders into two buffer chambers of a co-extrusion die, and preparing the double-layer adhesive film through the co-extrusion die.

The invention has the following beneficial effects:

the buffer chamber is used for uniformly feeding glue, so that the phenomenon of accumulation and stagnation of EVA melts at two ends of the rectangular buffer chamber is avoided, the lower sliding piece and the upper sliding piece are driven by the driver to move, namely the positions of the interfaces are changed, so that the buffer chamber is used for uniformly feeding glue, and the phenomenon of accumulation and stagnation of EVA melts at two ends of the rectangular buffer chamber is avoided, so that the glue discharging speed is stable and uniform, the quality of a glue film is ensured, the electric heating device is arranged on the outer box, the heat source output end of the electric heating device is in contact with the middle barrel, extra temperature is provided for the buffer chamber, and heat generated when the EVA melts flow through the buffer chamber is dissipated outwards.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a co-extrusion mold;

FIG. 2 is a schematic structural view of a co-extrusion mold;

FIG. 3 is a schematic view of the inlet drive arrangement;

FIG. 4 is a schematic view of a folding slide cover;

FIG. 5 is a schematic view of the structure of the folding sliding cover installed in the sliding slot;

FIG. 6 is a schematic view of the diverter chamber;

fig. 7 is a schematic view of the temporal structure of the shunting chamber;

FIG. 8 is a schematic view of a heating manifold;

FIG. 9 is a schematic structural view of the film outlet nozzle;

FIG. 10 is a schematic view of the structure at A in FIG. 9;

FIG. 11 is a schematic view of a heat conductor;

FIG. 12 is a schematic view of the structure at B in FIG. 11;

in the drawings, the components represented by the respective reference numerals are listed below:

1. an inlet drive; 2. a hose; 3. a connecting frame; 4. a buffer chamber; 5. a shunting chamber; 6. connecting blocks; 7. a film outlet nozzle; 8. a heater; 9. a heat conductor; 10. an inner box; 11. an outer box; 12. a lash adjuster; 13. heating the splitter plate; 101. a driver; 102. a cross bar; 103. folding the sliding cover; 104. a lower slip sheet; 105. an upper sliding sheet; 106. an interface; 107. a baffle plate; 401. a sliding slot opening; 501. a stepped groove; 502. a shunting cavity; 701. a seal ring; 702. a glue outlet cavity; 703. mounting a plate; 704. a screw hole; 705. an inclined surface; 706. a convection nozzle; 901. a middle cylinder; 902. a stirring rod; 903. an outer ring; 904. a connecting rod; 905. an inner ring; 1201. a housing; 1202. an adjustment device; 1203. a drive rod; 1204. an outer loop bar; 1205. an inner brace rod; 1301. a through hole; 1302. a first hinge base; 1303. heating plates; 1304. a second hinge base; 1305. a triangular notch; 1306. a first shunting block; 1307. and a second shunting block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

A production process of a white solar cell packaging EVA co-extrusion adhesive film is used for producing a white and transparent film for extrusion.

Wherein, the mass content of the white layer EVA is as follows:

resin: ethylene-vinyl acetate copolymer: 91-91.55;

auxiliary crosslinking agent: triallyl isocyanurate: 0.1-0.15;

a crosslinking agent: 2-ethylhexyl tert-butylperoxycarbonate: 0.6-0.8;

coupling agent: 3- (methacryloyloxy) propyltrimethoxysilane: 0.1-0.2;

light stabilizer: bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate: 0.15-0.2;

antioxidant: titanium dioxide: 7.5-8.5;

the mass content of transparent layer EVA:

resin: ethylene-vinyl acetate copolymer: 98.1-98.65;

auxiliary crosslinking agent: 0.2-0.3 parts of triallyl isocyanurate;

auxiliary crosslinking agent: ethoxylated trimethylolpropane triacrylate: 0.1-0.15;

a crosslinking agent: 2-ethylhexyl tert-butylperoxycarbonate: 0.8-1.0;

coupling agent: 3- (methacryloyloxy) propyltrimethoxysilane: 0.1-0.2

Light stabilizer: bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate: 0.1-0.15;

antioxidant: n-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate: 0.05-0.1.

Specifically, in practical use, the mass content of the white layer EVA is as follows:

resin: ethylene-vinyl acetate copolymer: 91.55;

auxiliary crosslinking agent: triallyl isocyanurate: 0.1;

a crosslinking agent: 2-ethylhexyl tert-butylperoxycarbonate: 0.6;

coupling agent: 3- (methacryloyloxy) propyltrimethoxysilane: 0.1;

light stabilizer: bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate: 0.15;

antioxidant: titanium dioxide: 7.5;

the mass content of transparent layer EVA:

resin: ethylene-vinyl acetate copolymer: 98.65 parts;

auxiliary crosslinking agent: 0.2 parts of triallyl isocyanurate;

auxiliary crosslinking agent: ethoxylated trimethylolpropane triacrylate: 0.1;

a crosslinking agent: 2-ethylhexyl tert-butylperoxycarbonate: 0.8;

coupling agent: 3- (methacryloyloxy) propyltrimethoxysilane: 0.1

Light stabilizer: bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate: 0.1;

antioxidant: n-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate: 0.05

and simultaneously opening two screw extruders, respectively extruding into two buffer chambers 4 of the co-extrusion die, and preparing the double-layer adhesive film through the co-extrusion die.

Referring to fig. 1-10, the present invention is a device for producing a white solar cell packaging EVA co-extrusion film, and further a co-extrusion mold for producing a double-layer film by using the above process.

The co-extrusion die mainly comprises an inlet driving device 1, a buffer chamber 4, a shunting chamber 5 and a film outlet nozzle 7, wherein the inlet driving device 1, the buffer chamber 4, the shunting chamber 5 and the film outlet nozzle 7 are arranged in duplicate, and the inlet driving device 1, the buffer chamber 4, the shunting chamber 5 and the film outlet nozzle 7 of each duplicate form extrusion of a layer of adhesive film;

wherein the surfaces of the buffer chamber 4 and the shunting chamber 5 are both provided with heat-insulating layers, which ensure that the EVA melt flowing into the buffer chamber 4 and the shunting chamber 5 can maintain the extrusion temperature, and improve the quality of the adhesive film.

The buffer chamber 4 has a slide notch 401; the sliding groove opening 401 is provided with a folding sliding cover 103;

specifically, the overlapped sliding cover 103 includes a lower sliding piece 104 and an upper sliding piece 105, two ends of the upper sliding piece 105 are slidably fitted on two adjacent lower sliding pieces 104, the lower sliding piece 104 and the upper sliding piece 105 are provided with a connector 106, and the end of the connector 106 is communicated with the hose 2, wherein the hose 2 is a stainless steel corrugated pipe, and the hose 2 is used for receiving glue extruded from the screw extruder.

Furthermore, the lower sliding piece 104 and the upper sliding piece 105 are both provided with inward-concave flanges, the lower sliding piece 104 and the upper sliding piece 105 are integrally C-shaped, the upper sliding piece 105 is in sliding fit in the lower sliding piece 104, the inner surface of the sliding groove opening 401 is wrapped in the lower sliding piece 104, the end surface of the upper flange of the upper sliding piece 105 is provided with a baffle 107, the side surface of the baffle 107 is attached to the end surface of the upper flange of the lower sliding piece 104, the part of the baffle 107, which exceeds the lower sliding piece 104, is attached to the surface of the groove opening of the sliding groove opening 401, and the EVA melt is prevented from overflowing in the sliding process of the lower sliding piece 104 and the upper sliding piece 105; the interface 106 is located at the middle of the lower slide 104 and the upper slide 105, and the end of the cross bar 102 is connected to the interface 106.

The other link 3 that is provided with between two buffer memory rooms 4, install import drive arrangement on the link 3, import drive arrangement 1 has one row of driver 101 including last, specific driver 101 is linear guide, a driver 101 passes through horizontal pole 102 and is connected with gleitbretter 104 or one go up gleitbretter 105 respectively, linear guide's slider assembly is connected to the one end of horizontal pole 102, interface 106 is connected to the other end, through driver 101 drive gleitbretter 104 down, go up the gleitbretter 105 removal, change the position of interface 106 promptly, make buffer memory room 4 carry out even advancing glue, avoid cuboid buffer memory room both ends department EVA fuse-element to appear piling up the phenomenon of stagnation, thereby guarantee out that glue speed is stable, it is even, guarantee the quality of glued membrane.

The shunting chamber 5 is communicated with the buffer chamber 4, a row of connecting blocks 6 are arranged on the side face of the shunting chamber 5, a connecting frame 3 is installed on each connecting block 6, an inlet driving device 1 is installed on each connecting frame 3, and the shunting chambers 5 are fixed together through the connecting blocks 6.

Wherein, the buffer chamber 4 comprises an outer case 11, and the sliding slot 401 is located on a port of the outer case 11.

Further, buffer chamber 4 still includes inner box 10, the port of inner box 10 is established to outer container 11 cover, install heat conductor 9 in the inner box 10, heat conductor 9 includes well section of thick bamboo 901 and outer loop 903, well section of thick bamboo 901 is gone up the cover and is equipped with one row of inner ring 905, connect through connecting rod 904 between outer loop 903 and the inner ring 905, it has the hole to open on the outer loop 903, connect through puddler 902 between one row of outer loop 903, well section of thick bamboo 901, outer loop 903, puddler 902 are made of heat-conducting material, in addition, install electric heater unit at outer container 11, its heat source output end and well section of thick bamboo 901 contact, provide extra temperature for buffer chamber 4, heat that produces when this supplementary EVA melt stream was through buffer chamber 3 is dissipated outward.

Furthermore, the shunting chamber 5 has a shunting cavity 502, the heating shunting plate 13 is installed in the shunting cavity 502, the heating shunting plate 13 comprises a heating plate 1303, a first shunting block 1306 and a second shunting block 1307, the end surface of the heating plate 1303 is provided with a first hinge seat 1302, the first shunting block 1306 and the second shunting block 1307 are hinged on the first hinge seat 1302, two sides of the shunting chamber 5 are provided with stepped grooves 501, the heating plate 1303 is provided with a through hole 1301, a support rod is matched in the through hole 1301, the end part of the support rod is matched in the stepped grooves 501, a heater 8 is installed in the stepped grooves 501, heat is provided for the heating shunting plate 13 through the heater 8, the heating shunting plate 13 specifically has the same heat supply mode as the electric heating device, the heating shunting plate 13 divides the shunting chamber 5 into two sides, when the EVA melt flows through the gap between the heating shunting plate 13 and the side wall of the shunting chamber 5, the thickness of the fluid is reduced by the heated shunting plate 13, thereby reducing the flow through the heating splitter plate 13 and causing the temperature of the EVA melt to change easily, thereby ensuring that the temperature of the EVA melt is within a predetermined range when the EVA melt enters the film outlet nozzle 7.

The side gap adjuster 12 of the shunting chamber 5, the gap adjuster 12 comprises a housing 1201 and an adjusting device 1202, the output end of the adjusting device 1202 is provided with a driving rod 1203, the end part of the driving rod 1203 extends into the shunting chamber 5, the driving rod 1203 is provided with two connecting ends, the two connecting ends are respectively connected to a first shunting block 1306 and a second shunting block 1307, when the temperature of the EVA melt exceeds a preset range, temporary plugging can be carried out through the gap adjuster 12, or the gap interval reserved between the shunting chamber 5 and the first shunting block 1306 and the second shunting block 1307 is changed, the thickness of the fluid is changed, the propelling speed of a screw extruder is combined, and the quality of a glue film is improved.

Preferably, the driving rod 1203 comprises an outer support rod 1204 and an inner support rod 1205, the inner support rod 1205 is arranged on the outer support rod 1204, the end of the inner support rod 1205 passes through a hole on the second split block 1307 to be hinged with the first split block 1306, the outer support rod 1204 is hinged with the second split block 1307, a triangular notch 1305 is formed in the side surface of the first split block 1306, a second hinge seat 1304 is arranged in the triangular notch 1305, the end of the inner support rod 1205 is hinged with the second hinge seat 1304, the outer support rod 1204 is a sleeve rod with a radial section being in a shape of "C", the end of the outer support rod 1204 is hinged with the second split block 1307, the second split block 1307 is provided with a rectangular opening, and a rubber sleeve is arranged in the rectangular opening, so that the second split block 1307 and the first split block 1306 can block 5 to block off the split chamber after the outer support rod 1204 is moved, and EVA melt in the rectangular opening can not enter the film outlet nozzle 7.

The shunting chamber 5 and the buffer chamber 4 are arranged in pairs, the port of the shunting chamber 5 is detachably provided with a film outlet nozzle 7, the film outlet nozzle 7 is provided with a convection nozzle 706, and the two pairs of the flow nozzles 706 are oppositely arranged.

The film outlet nozzle 7 is provided with an inclined surface 705, the convection nozzle 706 is arranged on the inclined surface 705, the film outlet nozzle 7 is provided with a glue outlet cavity 702, the convection nozzle 706 is communicated with the glue outlet cavity 702, and the glue outlet cavity 702 is provided with a sealing ring 701;

the film outlet nozzle 7 is provided with a mounting plate 703, and the mounting plate 703 is provided with a screw hole 704.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a white solar cell encapsulation EVA is crowded glued membrane apparatus for producing altogether which characterized in that:

a buffer chamber (4), wherein the buffer chamber (4) is provided with a sliding notch (401);

the folding sliding cover (103) is arranged on the sliding groove opening (401), the folding sliding cover (103) comprises lower sliding pieces (104) and upper sliding pieces (105), two ends of each upper sliding piece (105) are in sliding fit with the two adjacent lower sliding pieces (104), the lower sliding pieces (104) and the upper sliding pieces (105) are provided with interfaces (106), and the folding sliding cover (103) is arranged on the sliding groove opening (401);

flow distribution chamber (5), flow distribution chamber (5) and buffer chamber (4) UNICOM, the side of flow distribution chamber (5) is equipped with one row of connecting block (6), install link (3) on connecting block (6), install import drive arrangement (1) on link (3), import drive arrangement (1) has one row of driver (101) including last, a driver (101) pass through horizontal pole (102) respectively with gleitbretter (104) or one go up gleitbretter (105) and connect.

2. The production device of the EVA co-extrusion film for the packaging of the white solar cell according to claim 1, wherein the interface (106) is located in the middle of the lower sliding sheet (104) and the upper sliding sheet (105), the end of the cross bar (102) is connected to the interface (106), and the end of the interface (106) is communicated with the hose (2).

3. The production device of the EVA co-extrusion film for the packaging of the white solar cell as claimed in claim 2, wherein the buffer chamber (4) comprises an outer box (11), the sliding slot (401) is located at the port of the outer box (11), the lower sliding sheet (104) and the upper sliding sheet (105) are both provided with inward-concave flanges, the end face of the upward flange of the upper sliding sheet (105) is provided with a baffle (107), and the side face of the baffle (107) is attached to the end face of the upward flange of the lower sliding sheet (104).

4. The production process and device of the white solar cell packaging EVA co-extrusion film as claimed in claim 3, wherein the buffer chamber (4) further comprises an inner box (10), the outer box (11) is sleeved at a port of the inner box (10), a heat conductor (9) is installed in the inner box (10), the heat conductor (9) comprises a middle cylinder (901) and an outer ring (903), the middle cylinder (901) is sleeved with a row of inner rings (905), the outer ring (903) and the inner rings (905) are connected through a connecting rod (904), the outer ring (903) is provided with a hole, the outer rings (903) are connected through a stirring rod (902), and the middle cylinder (901), the outer ring (903) and the stirring rod (902) are made of heat-conducting materials.

5. The production device of the white EVA co-extrusion film for the solar cell package according to any one of claims 1 to 4, wherein a heating flow distribution plate (13) is installed in the flow distribution chamber (5), the heating flow distribution plate (13) comprises a heating plate (1303), a first flow distribution block (1306) and a second flow distribution block (1307), a first hinged support (1302) is arranged on the end surface of the heating plate (1303), the first flow distribution block (1306) and the second flow distribution block (1307) are hinged on the first hinged support (1302), stepped grooves (501) are formed in two sides of the flow distribution chamber (5), through holes (1301) are formed in the heating plate (1303), a support rod is matched in the through holes (1301), the end of the support rod is matched in the stepped grooves (501), and a heater (8) is installed in the stepped grooves (501);

the side surface gap adjuster (12) of the shunting chamber (5), the output end of the gap adjuster (12) is provided with a driving rod (1203), the end part of the driving rod (1203) extends into the shunting chamber (5), and the driving rod (1203) is provided with two connecting ends which are respectively connected to the first shunting block (1306) and the second shunting block (1307).

6. The production device of the white solar cell packaging EVA co-extrusion film as claimed in claim 5, wherein the driving rod (1203) comprises an outer sleeve rod (1204) and an inner support rod (1205), the inner support rod (1205) is arranged on the outer sleeve rod (1204), the end of the inner support rod (1205) is hinged with the first shunting block (1306) through a hole on the second shunting block (1307), and the outer sleeve rod (1204) is hinged with the second shunting block (1307).

7. The production device of the EVA co-extrusion film for the white solar cell package according to claim 5, wherein a triangular notch (1305) is formed in the side surface of the first shunt block (1306), a second hinge base (1304) is arranged in the triangular notch (1305), the end of the inner support rod (1205) is hinged to the second hinge base (1304), the outer sleeve rod (1204) is a sleeve rod with a radial section of C shape, the end of the outer sleeve rod (1204) is hinged to the second shunt block (1307), the second shunt block (1307) is provided with a rectangular opening, and a rubber sleeve is arranged in the rectangular opening.

8. The production device of the white EVA co-extrusion film for solar cell packaging according to claim 1, wherein the shunting chamber (5) and the buffer chamber (4) are arranged in pairs, a film outlet nozzle (7) is detachably mounted at a port of the shunting chamber (5), the film outlet nozzle (7) is provided with a convection nozzle (706), and the two convection nozzles (706) are arranged oppositely.

9. The production device of the EVA co-extrusion film for the packaging of the white solar cell as claimed in claim 1, wherein the film outlet nozzle (7) is provided with an inclined surface (705), the convection nozzle (706) is arranged on the inclined surface (705), the film outlet nozzle (7) is provided with a glue outlet cavity (702), the convection nozzle (706) and the glue outlet cavity (702) are communicated, and the glue outlet cavity (702) is provided with a sealing ring (701);

the film outlet nozzle (7) is provided with an installation plate (703), and the installation plate (703) is provided with a screw hole (704).

10. A production process of a white solar cell packaging EVA co-extrusion film, which uses the production device of the white solar cell packaging EVA co-extrusion film as claimed in claim 9,

and the mass content of the white layer EVA is as follows:

ethylene-vinyl acetate copolymer: 91-91.55;

triallyl isocyanurate: 0.1-0.15;

2-ethylhexyl tert-butylperoxycarbonate: 0.6-0.8;

3- (methacryloyloxy) propyltrimethoxysilane: 0.1-0.2;

bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate: 0.1-0.15;

titanium dioxide: 7.5-8.5;

the mass content of transparent layer EVA:

ethylene-vinyl acetate copolymer: 98.1-98.65;

0.2-0.3 parts of triallyl isocyanurate;

ethoxylated trimethylolpropane triacrylate: 0.1-0.15;

2-ethylhexyl tert-butylperoxycarbonate: 0.8-1.0;

3- (methacryloyloxy) propyltrimethoxysilane: 0.1-0.2;

bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate: 0.1-0.15;

n-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate: 0.05-0.1;

uniformly mixing the materials for the transparent layer EVA, pouring the mixture into a screw extruder, uniformly mixing the materials for the white layer EVA, and pouring the mixture into another screw extruder;

and simultaneously opening two screw extruders, respectively extruding into two buffer chambers (4) of the co-extrusion die, and preparing the double-layer adhesive film through the co-extrusion die.