CN115651290A - Preparation method and device of low-smoke low-heat-release flame-retardant polyolefin - Google Patents
Preparation method and device of low-smoke low-heat-release flame-retardant polyolefin Download PDFInfo
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Abstract
The invention discloses a preparation method and a device of low-smoke low-heat-release flame-retardant polyolefin, which comprises the following steps of adding magnesium hydroxide powder into water, adding sodium hexametaphosphate, stirring and mixing to form slurry, adding disodium hydrogen phosphate and zinc oxide into the slurry after uniformly mixing, and adding a silane coupling agent at 75-85 ℃. According to the invention, through the design of the mixing mechanism and the conveying mechanism, the magnesium hydroxide powder, the water, the sodium hexametaphosphate and other materials can be mixed in the cylinder body to form slurry, after the mixing is finished, the mixed slurry can be filtered and dried through the conveying mechanism, and the dried magnesium hydroxide is discharged out of the box body through the discharge pipe and the connecting frame.
Description
Technical Field
The invention relates to the technical field of polyolefin preparation, in particular to a preparation method and a device of low-smoke low-heat-release flame-retardant polyolefin.
Background
The flame retardant with low smoke, no halogen and low heat release is the development trend of the existing flame retardant, and the magnesium hydroxide is used as the inorganic flame retardant, has no toxicity, less environmental pollution and rich raw materials, and is a better flame retardant material.
Polyolefin generally refers to a generic name of thermoplastic resins obtained by singly polymerizing or copolymerizing ethylene, propylene, 1-butene, 1-pentene, 1-hexene and other alpha-olefins and certain cycloolefins, and the thermoplastic resins have the advantages of abundant raw materials, low price, easy processing and molding, and excellent comprehensive performance, so that the polyolefin is a polymer material with the largest output and very wide application, but the polyolefin has inflammability, so that the application field of the polyolefin material is limited, and a flame retardant can be added into the polyolefin raw materials in order to improve the flame retardance of the polyolefin material.
In the preparation process of the polyolefin flame-retardant modification process, the steps of mixing and stirring, heating, filtering, drying and the like of the prepared raw materials are completely and separately carried out, in the preparation process of the polyolefin flame-retardant modification process, the mixed raw materials need to be added into a stirring device for stirring, then heating and reacting are carried out, then the raw materials are filtered by using a filtering device and transferred into drying equipment, so that the process in the preparation process of the polyolefin flame-retardant modification process is complicated, and the efficiency in the preparation process of the polyolefin flame-retardant modification process is low.
Therefore, there is a need for a method and apparatus for preparing low smoke, low heat release flame retardant polyolefin.
Disclosure of Invention
The invention aims to solve the technical problem that when polyolefin is prepared in such a way, mixed raw materials need to be transferred into drying equipment, so that the preparation process of flame-retardant polyolefin is more, and the preparation efficiency of flame-retardant polyolefin is lower.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a preparation method of low-smoke low-heat-release flame-retardant polyolefin comprises the following steps,
(1) Adding magnesium hydroxide powder into water, adding sodium hexametaphosphate, stirring and mixing to form slurry, adding disodium hydrogen phosphate and zinc oxide into the slurry after uniformly mixing, adding a silane coupling agent into the slurry at 75 to 85 ℃, stirring and mixing for reaction, filtering and drying to obtain modified magnesium hydroxide;
(2) Uniformly mixing the modified magnesium hydroxide, the polyolefin, the aluminum diethylphosphinate and the methyl vinyl silicone rubber, wherein the mass ratio of the magnesium hydroxide to the polyolefin to the aluminum diethylphosphinate to the methyl vinyl silicone rubber is 30 to 40:60 to 70:2 to 5: and 1 to 5, banburying, extruding, granulating and cooling to obtain the low-smoke low-heat-release flame-retardant polyolefin.
As a preferred scheme of the preparation method of the low-smoke low-heat-release flame-retardant polyolefin, the preparation method comprises the following steps:
(1) Adding 14-16 kg of magnesium hydroxide powder into 200L of water, adding 70-80g of sodium hexametaphosphate, stirring and mixing to form slurry, adding 400-500g of disodium hydrogen phosphate and 500-600g of zinc oxide into 200L of water, uniformly mixing, adding into the slurry, adding 20-50g of silane coupling agent at 80 ℃, stirring and mixing for 4-6 hours, filtering, and drying to obtain modified magnesium hydroxide;
(2) Uniformly mixing modified magnesium hydroxide, polyolefin, aluminum diethylphosphinate and methyl vinyl silicone rubber, wherein the mass ratio of the magnesium hydroxide to the polyolefin to the aluminum diethylphosphinate to the methyl vinyl silicone rubber is 30:65:3: and banburying at 2,120 ℃, extruding for granulation, and cooling to obtain the low-smoke low-heat-release flame-retardant polyolefin.
As a preferred scheme of the preparation method of the low-smoke low-heat-release flame-retardant polyolefin, the preparation method comprises the following steps: the polyolefin comprises polyethylene and ethylene-vinyl acetate copolymer.
As another aspect of the present invention, the present invention provides a low-smoke, low-heat-release, flame-retardant polyolefin preparation apparatus, comprising a barrel and a box, wherein: the box body is fixedly arranged at the bottom of the barrel body, a mixing mechanism is arranged in the barrel body and used for mixing raw materials, and a conveying mechanism is arranged in the box body and used for conveying materials;
the mixing mechanism comprises a first motor, the first motor is fixedly arranged at the top of the barrel body, the first motor is fixedly connected with a rotating rod through an output shaft, the rotating rod penetrates through the barrel body and extends into the barrel body, a mixing frame is fixedly arranged at the bottom of the rotating rod, and a mixing assembly for mixing raw materials is arranged outside the mixing frame;
the heating plate is embedded at the bottom of the cylinder body.
As a preferred scheme of the preparation device of the low-smoke low-heat-release flame-retardant polyolefin, the preparation device comprises the following steps: the mixing assembly comprises a cross rod, the cross rod runs through and mixes the frame and pass through bearing swing joint with mixing the frame, the cross rod both ends are all fixed and are equipped with first gear, the fixed ring that is equipped with on the barrel inner wall, the fixed rack that is equipped with in ring top, first gear is located the rack top and is meshed with the rack, the cross rod outside is equipped with a plurality of hybrid unit, and is a plurality of inside hybrid unit all locates mixing the frame, hybrid unit includes first sleeve, first sleeve is fixed to be located the cross rod outside, the fixed a plurality of hybrid rods that are equipped with in first sleeve outside.
As a preferred scheme of the preparation device of the low-smoke low-heat-release flame-retardant polyolefin, the preparation device comprises the following steps: mixing mechanism still advances the subassembly including advancing, it is used for advancing the raw materials of barrel inside to advance the subassembly, it includes the montant to advance the subassembly, the montant is fixed to be located and is mixed the frame bottom, the montant external fixation is equipped with the second sleeve, second sleeve external fixation is equipped with a plurality of first flabellums, the montant external fixation is equipped with first scraper blade, first scraper blade bottom contacts with the hot plate top.
As a preferred scheme of the preparation device of the low-smoke low-heat-release flame-retardant polyolefin, the preparation device comprises the following steps: transport mechanism includes the second motor, the fixed box one side of locating of second motor, the second motor passes through output shaft fixedly connected with axis of rotation, the axis of rotation runs through the box and extends into inside the box, the axis of rotation external fixation is equipped with the plectane, the runner has been seted up on the plectane, logical groove has been seted up to the barrel bottom, the plectane top is run through logical groove and is extended into inside the barrel, the axis of rotation external fixation is equipped with the second gear, the montant runs through the hot plate and extends into the hot plate bottom, the montant passes through the bearing with the hot plate and is connected, the montant external fixation is equipped with the second scraper blade, second scraper blade top contacts with the hot plate bottom, the montant external fixation is equipped with a plurality of second flabellums.
As a preferred scheme of the preparation device of the low-smoke low-heat-release flame-retardant polyolefin, the preparation device comprises the following steps: the inside subassembly of breaing up that is equipped with of box, the subassembly of breaing up is used for breaing up the inside raw materials of box, two the subassembly of breaing up is located the axis of rotation both sides respectively, the subassembly of breaing up includes the pivot, axis of rotation one side is located in the pivot, the pivot external fixation is equipped with the third gear, the third gear is located second gear one side and is meshed with the second gear mutually, the pivot external fixation is equipped with a plurality of linking rods, the inside fixed supporting network that is equipped with of box, the supporting network top is equipped with the filter membrane, the fixed frame that is equipped with in supporting network top, second gear and third gear all locate inside the fixed frame.
As a preferred scheme of the preparation device of the low-smoke low-heat-release flame-retardant polyolefin, the preparation device comprises the following steps: the fixed discharging pipe that is equipped with in box one side, it has the net of ventilating to inlay on the discharging pipe, the axis of rotation runs through the net of ventilating and is connected through the bearing with the net of ventilating, the axis of rotation external fixation is equipped with a plurality of third flabellums, the discharging pipe outside is located to the third flabellum, the axis of rotation external fixation is equipped with a plurality of third scraper blades, and is a plurality of the third scraper blade is located inside the discharging pipe and is contacted with net one side of ventilating, the discharging pipe internal fixation is equipped with the water conservancy diversion otter board, the axis of rotation runs through the water conservancy diversion otter board, the fixed connection frame that is equipped with in discharging pipe one side.
As a preferred scheme of the preparation device of the low-smoke low-heat-release flame-retardant polyolefin, the preparation device comprises the following steps: the improved vacuum pump box comprises a box body, and is characterized in that a negative pressure pump is arranged on one side of the box body, a connecting pipe is fixedly arranged on one side of the negative pressure pump, the connecting pipe extends into the box body, a first supporting seat is fixedly arranged on one side of the box body, the negative pressure pump is fixedly arranged at the top of the first supporting seat, a second supporting seat is fixedly arranged on one side of the box body, a second motor is fixedly arranged at the top of the second supporting seat, a feeding hopper is fixedly arranged at the top of the box body, a protection frame is fixedly arranged at the top of the box body, the first motor is fixedly arranged in the protection frame, an outlet pipe is fixedly arranged on one side of the box body, an electromagnetic valve is fixedly arranged outside the outlet pipe, and two supporting plates are fixedly arranged at the bottom of the box body.
By adopting the technical scheme, the method has the following beneficial effects:
1. according to the invention, through the design of the mixing mechanism and the conveying mechanism, the magnesium hydroxide powder, the water, the sodium hexametaphosphate and other materials can be mixed in the cylinder body to form slurry, after the mixing is finished, the slurry can be heated through the heating plate, the mixed slurry is filtered and dried through the conveying mechanism, and the dried magnesium hydroxide is discharged out of the box body through the discharge pipe and the connecting frame.
2. According to the invention, through the design of the mixing mechanism and the design of the mixing frame and the mixing rod, the rotation of the mixing frame is vertical rotation, the rotation of the mixing rod is horizontal rotation, and through the rotation of the mixing frame and the mixing rod, raw materials in the barrel can be mixed in different directions, so that the raw materials in the barrel are mixed more uniformly.
3. According to the invention, through the design of the first fan blade, the first fan blade can rotate to push the raw materials in the box body, so that the problems of long-time accumulation of the raw materials in the barrel body and the bottom of the barrel body can be effectively avoided, the vertical rod can also drive the first scraper blade to rotate while rotating, and through the design of the first scraper blade, the problem that the raw materials in the barrel body are adhered to the heating plate due to heating can be avoided.
4. According to the invention, through the design of the conveying mechanism, the slurry in the barrel can indirectly enter the box body through the rotation of the circular plate, the second fan blade can blow heat emitted by the heating plate to the raw material on the filter membrane through the rotation of the circular plate, so that the raw material on the filter membrane can be heated, the raw material can be blown through the rotation of the second fan blade, the suction force can be generated through the rotation of the third fan blade, the raw material blown by the second fan blade can be adsorbed into the discharging pipe through the suction force, the raw material adsorbed by the third fan blade can be scraped through the rotation of the third scraper blade, the raw material accumulation and the ventilation net are avoided, the adsorbed raw material can be guided through the design of the guide screen plate, so that the dried raw material can be discharged out of the box body through the discharging pipe, and a user can collect the dried raw material at the bottoms of the discharging pipe and the connecting frame.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a schematic view of the overall structure provided by the present invention;
FIG. 2 is a cross-sectional view provided by the present invention;
FIG. 3 is a schematic view of the internal structure of the barrel provided by the present invention;
FIG. 4 is a schematic view of the internal structure of the case provided by the present invention;
FIG. 5 is a bottom perspective view of the interior of the case provided by the present invention;
FIG. 6 is a perspective view of a circular plate provided by the present invention;
fig. 7 is a perspective view of a tapping pipe according to the invention.
In the figure: 1. a barrel; 2. a box body; 3. a first motor; 4. rotating the rod; 5. a mixing frame; 6. heating the plate; 7. a cross bar; 8. a first gear; 9. a circular ring; 10. a rack; 11. a first sleeve; 12. a mixing rod; 13. a vertical rod; 14. a second sleeve; 15. a first fan blade; 16. a first squeegee; 17. a second motor; 18. a rotating shaft; 19. a circular plate; 20. a circulation tank; 21. a through groove; 22. a second gear; 23. a second squeegee; 24. a second fan blade; 25. a rotating shaft; 26. a third gear; 27. a connecting rod; 28. a support net; 29. filtering the membrane; 30. a fixing frame; 31. a discharge pipe; 32. a ventilation net; 33. a third fan blade; 34. a third squeegee; 35. a flow guiding screen plate; 36. a connecting frame; 37. a negative pressure pump; 38. a connecting pipe; 39. a first support base; 40. a second support seat; 41. a feed hopper; 42. a protective frame; 43. a water outlet pipe; 44. an electromagnetic valve; 45. and a support plate.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.
The invention relates to a preparation method of low-smoke low-heat-release flame-retardant polyolefin, which comprises the following steps:
(1) Adding 14 kg of magnesium hydroxide powder into 200L of water, adding 80g of sodium hexametaphosphate, stirring and mixing to obtain slurry, adding 500g of disodium hydrogen phosphate and 600g of zinc oxide into 200L of water, uniformly mixing, adding into the slurry, adding 50g of silane coupling agent at 80 ℃, stirring and mixing for 4 hours, filtering and drying to obtain the modified magnesium hydroxide.
(2) Uniformly mixing modified magnesium hydroxide, polyolefin, aluminum diethylphosphinate and methyl vinyl silicone rubber, wherein the mass ratio of the magnesium hydroxide to the polyolefin to the aluminum diethylphosphinate to the methyl vinyl silicone rubber is 30:65:3: banburying at 2,120 deg.c, extruding to pelletize and cooling to obtain low-smoke low-heat-release fire-retardant polyolefin.
Referring to fig. 1-7, the device for preparing modified magnesium hydroxide in step (1) in the preparation process of low-smoke, low-heat-release flame-retardant polyolefin of the invention comprises a cylinder 1 and a box 2, and is characterized in that: the box body 2 is fixedly arranged at the bottom of the barrel body 1, a mixing mechanism is arranged in the barrel body 1 and used for mixing raw materials, and a conveying mechanism is arranged in the box body 2 and used for conveying materials;
the mixing mechanism comprises a first motor 3, the first motor 3 is fixedly arranged at the top of the barrel body 1, the first motor 3 is fixedly connected with a rotating rod 4 through an output shaft, the rotating rod 4 penetrates through the barrel body 1 and extends into the barrel body 1, a mixing frame 5 is fixedly arranged at the bottom of the rotating rod 4, and a mixing component for mixing raw materials is arranged outside the mixing frame 5;
the heating plate 6 is embedded at the bottom of the cylinder body 1.
Wherein, in order to solve the problem of mixing 1 inside raw materials of barrel, the mixed subassembly includes horizontal pole 7, horizontal pole 7 runs through mixed frame 5 and passes through bearing swing joint with mixed frame 5, 7 both ends of horizontal pole are all fixed and are equipped with first gear 8, the fixed ring 9 that is equipped with on 1 inner wall of barrel, the fixed rack 10 that is equipped with in ring 9 top, first gear 8 locates rack 10 top and meshes with rack 10 mutually, 7 outsides of horizontal pole are equipped with a plurality of hybrid unit, 5 insides of mixed frame are all located to a plurality of hybrid unit, hybrid unit includes first sleeve 11, first sleeve 11 is fixed and is located 7 outsides of horizontal pole, 11 external fixings of first sleeve are equipped with a plurality of hybrid bars 12.
Wherein, in order to solve the problem of mixing the raw materials inside barrel 1, mixing mechanism still includes and impels the subassembly, impel the subassembly and be used for impelling 1 inside raw materials of barrel, impel the subassembly to include montant 13, montant 13 is fixed to be located and mixes frame 5 bottom, montant 13 external fixation is equipped with second sleeve 14, second sleeve 14 external fixation is equipped with a plurality of first flabellums 15, montant 13 external fixation is equipped with first scraper blade 16, first scraper blade 16 bottom contacts with 6 tops of hot plate.
Wherein, in order to solve the problem of carrying out the conveying to the raw materials of box 2 inside, transport mechanism includes second motor 17, second motor 17 is fixed to be located box 2 one side, second motor 17 passes through output shaft fixedly connected with axis of rotation 18, axis of rotation 18 runs through box 2 and extends into inside box 2, axis of rotation 18 external fixation is equipped with plectane 19, runner 20 has been seted up on plectane 19, logical groove 21 has been seted up to barrel 1 bottom, plectane 19 top runs through logical groove 21 and extends into inside barrel 1, axis of rotation 18 external fixation is equipped with second gear 22, montant 13 runs through hot plate 6 and extends into hot plate 6 bottom, montant 13 passes through the bearing with hot plate 6 and is connected, montant 13 external fixation is equipped with second scraper blade 23, second scraper blade 23 top contacts bottom hot plate 6, montant 13 external fixation is equipped with a plurality of second flabells 24.
Wherein, in order to solve the problem of breaing up the inside raw materials of box 2, the inside subassembly that breaks up that is equipped with of box 2, it is used for breaing up the inside raw materials of box 2 to break up the subassembly, two are broken up the subassembly and are located the 18 both sides of axis of rotation respectively, it includes pivot 25 to break up the subassembly, pivot 25 is located axis of rotation 18 one side, pivot 25 external fixation is equipped with third gear 26, third gear 26 locates second gear 22 one side and meshes with second gear 22 mutually, pivot 25 external fixation is equipped with a plurality of linking poles 27, the inside fixed supporting network 28 that is equipped with of box 2, the 28 tops of supporting network are equipped with filter membrane 29, the fixed frame 30 that is equipped with in 28 tops of supporting network, second gear 22 and third gear 26 are all located inside the fixed frame 30.
Wherein, in order to solve the problem of the ejection of compact, the fixed discharging pipe 31 that is equipped with in box 2 one side, it has ventilation net 32 to inlay on the discharging pipe 31, axis of rotation 18 runs through ventilation net 32 and is connected through the bearing with ventilation net 32, 18 external fixation of axis of rotation is equipped with a plurality of third flabellums 33, discharging pipe 31 outside is located to third flabellum 33, 18 external fixation of axis of rotation is equipped with a plurality of third scraper blades 34, a plurality of third scraper blades 34 are located discharging pipe 31 inside and are contacted with ventilation net 32 one side, discharging pipe 31 internal fixation is equipped with water conservancy diversion otter board 35, axis of rotation 18 runs through water conservancy diversion otter board 35, discharging pipe 31 one side is fixed and is equipped with the carriage 36.
Wherein, in order to solve the problem of carrying out the filter-pressing to the raw materials, 2 one side of box is equipped with negative pressure pump 37, the fixed connecting pipe 38 that is equipped with in negative pressure pump 37 one side, inside connecting pipe 38 extended into 2 of box, 2 one side of box is fixed and is equipped with first supporting seat 39, negative pressure pump 37 is fixed to be located first supporting seat 39 tops, 2 one side of box is fixed and is equipped with second supporting seat 40, second motor 17 is fixed to be located the 40 tops of second supporting seat, 1 top of barrel is fixed and is equipped with feeder hopper 41, 1 top of barrel is fixed and is equipped with protection frame 42, first motor 3 is fixed and is located inside protection frame 42, 2 one side of box is fixed and is equipped with outlet pipe 43, outlet pipe 43 external fixation is equipped with solenoid valve 44, 2 bottom of box is fixed and is equipped with two backup pads 45.
The working principle is as follows: when the invention is used, firstly the invention is connected with an external power supply, then the raw materials to be mixed are put into the cylinder body 1 through the feed hopper 41, the first motor 3 and the heating plate 6 are started simultaneously, the first motor 3 works to drive the rotating rod 4 to rotate, the rotating rod 4 rotates to drive the mixing frame 5 to rotate, the mixing frame 5 rotates to drive the cross rod 7 to rotate around the center of the rotating rod 4, the cross rod 7 rotates to drive the first gear 8 to move, because the first gear 8 is meshed with the rack 10, therefore, the first gear 8 can rotate while moving, the first gear 8 rotates to drive the cross rod 7 to rotate, the cross rod 7 rotates to drive a plurality of first sleeves 11 outside the cross rod 7 to rotate around the central axis of the cross rod 7, the first sleeves 11 rotate to drive a plurality of mixed rotations outside the first sleeves 11, meanwhile, the heating plate 6 works to heat the raw materials in the cylinder 1, the mixing frame 5 rotates vertically through the design of the mixing mechanism and the design of the mixing frame 5 and the mixing rod 12, and the rotation of the mixing rod 12 is a horizontal rotation, by the rotation of the mixing frame 5 and the mixing rod 12, the raw materials in the barrel body 1 can be mixed in different directions, so that the raw materials in the barrel body 1 can be mixed more uniformly, the vertical rod 13 can drive the first sleeve 11 to rotate while rotating, the second sleeve 14 rotates to drive the plurality of first fan blades 15 outside the second sleeve 14 to rotate, the first fan blades 15 rotate to push the raw materials in the box body, thereby effectively avoiding the problems of long-time accumulation of raw materials in the cylinder body 1 and the bottom of the cylinder body 1, driving the first scraper 16 to rotate while the vertical rod 13 rotates, the design of the first scraper 16 can avoid the problem that the raw material in the cylinder 1 is adhered to the heating plate 6 due to heating;
after the raw materials in the barrel 1 are mixed, the second motor 17 can be started, the second motor 17 works to drive the rotating shaft 18 to rotate, the rotating shaft 18 rotates to drive the circular plate 19 to rotate, because the top of the circular plate 19 extends into the barrel 1, when the circulation groove 20 on the circular plate 19 rotates into the barrel 1, the raw materials in the barrel 1 can enter the box 2 through the circulation groove 20, through the design of the filter membrane 29 and the support frame, the water in the raw materials can flow into the bottom of the filter membrane 29 through the filter membrane 29, the negative pressure pump 37 can be started at the same time, the negative pressure pump 37 works to pump and press the bottom of the box 2, so that the pressure at the bottom of the filter membrane 29 is small, the pressure can be generated on the raw materials at the top of the filter membrane 29, the water in the raw materials can be filtered out more quickly, the second gear 22 can be driven to rotate while the rotating shaft 18 rotates to drive the third gear 26 to rotate, the third gear 26 rotates to drive the rotating shaft 25 to rotate, the rotating shaft 25 rotates to drive the plurality of connecting rods 27 outside the rotating shaft 25 to rotate, the connecting rods 27 rotate to break up raw materials at the top of the filter membrane 29, the vertical rod 13 rotates and simultaneously drives the plurality of second fan blades 24 outside the vertical rod 13 to rotate, the heating plate 6 can heat air around the heating plate 6 during working, the plurality of second fan blades 24 rotate to blow heat emitted by the heating plate 6 to the raw materials on the filter membrane 29, so that the raw materials on the filter membrane 29 can be dried, when the raw materials are lightened in volume due to drying, the raw materials can be blown by the rotation of the second fan blades 24, the rotating shaft 18 rotates and simultaneously drives the third fan blades 33 to rotate, the third fan blades 33 can generate suction, and the suction can absorb the raw materials blown by the second fan blades 24 into the discharging pipe 31, rotation axis 18 still can drive third scraper blade 34 when pivoted and rotate, the rotation of third scraper blade 34 can be scraped the raw materials that third flabellum 33 adsorbs to come down, avoid the raw materials pile up with on the ventilation net 32, through the design of water conservancy diversion otter board 35, can carry out the water conservancy diversion to the raw materials that adsorbs to come, make inside the raw materials after the drying can discharge box 2 through discharging pipe 31, the user can collect the raw materials after the drying bottom discharging pipe 31 and the connecting frame 36.
The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and these embodiments are still within the scope of the invention.
Claims (10)
1. A preparation method of low-smoke low-heat-release flame-retardant polyolefin is characterized by comprising the following steps: the method comprises the following steps of (a) preparing,
(1) Adding magnesium hydroxide powder into water, adding sodium hexametaphosphate, stirring and mixing to form slurry, adding disodium hydrogen phosphate and zinc oxide into the slurry after uniformly mixing, adding the slurry into the slurry, adding a silane coupling agent at 75 to 85 ℃, stirring and mixing for reaction, filtering and drying to obtain modified magnesium hydroxide;
(2) Uniformly mixing the modified magnesium hydroxide, the polyolefin, the aluminum diethylphosphinate and the methyl vinyl silicone rubber, wherein the mass ratio of the magnesium hydroxide to the polyolefin to the aluminum diethylphosphinate to the methyl vinyl silicone rubber is (30) - (40): 60 to 70:2 to 5: and 1 to 5, banburying, extruding, granulating and cooling to obtain the flame-retardant polyolefin with low smoke and low heat release.
2. A method of preparing a low smoke, low heat release flame retardant polyolefin according to claim 1, characterized in that: the method comprises the following steps of (1),
(1) Adding 14-16 kg of magnesium hydroxide powder into 200L of water, adding 70-80g of sodium hexametaphosphate, stirring and mixing to form slurry, adding 400-500g of disodium hydrogen phosphate and 500-600g of zinc oxide into 200L of water, uniformly mixing, adding into the slurry, adding 20-50g of silane coupling agent at 80 ℃, stirring and mixing for 4-6 h, filtering, and drying to obtain modified magnesium hydroxide;
(2) Uniformly mixing modified magnesium hydroxide, polyolefin, aluminum diethylphosphinate and methyl vinyl silicone rubber, wherein the mass ratio of the magnesium hydroxide to the polyolefin to the aluminum diethylphosphinate to the methyl vinyl silicone rubber is 30:65:3: and banburying at 2,120 ℃, extruding for granulation, and cooling to obtain the low-smoke low-heat-release flame-retardant polyolefin.
3. A process for preparing a low smoke, low heat release flame retardant polyolefin according to claim 1 or 2, characterized in that: the polyolefin comprises polyethylene and ethylene-vinyl acetate copolymer.
4. A device for preparing low-smoke, low-heat-release and flame-retardant polyolefin as claimed in claim 1, which comprises a cylinder (1) and a box body (2), and is characterized in that: the box body (2) is fixedly arranged at the bottom of the barrel body (1), a mixing mechanism is arranged in the barrel body (1) and used for mixing raw materials, and a conveying mechanism is arranged in the box body (2) and used for conveying materials;
the mixing mechanism comprises a first motor (3), the first motor (3) is fixedly arranged at the top of the barrel body (1), the first motor (3) is fixedly connected with a rotating rod (4) through an output shaft, the rotating rod (4) penetrates through the barrel body (1) and extends into the barrel body (1), a mixing frame (5) is fixedly arranged at the bottom of the rotating rod (4), and a mixing assembly for mixing raw materials is arranged outside the mixing frame (5);
the heating plate (6) is embedded at the bottom of the cylinder body (1).
5. The apparatus for preparing low smoke, low heat release flame retardant polyolefin according to claim 4, wherein: mix the subassembly and include horizontal pole (7), horizontal pole (7) run through mix frame (5) and pass through bearing swing joint with mix frame (5), horizontal pole (7) both ends are all fixed and are equipped with first gear (8), fixed ring (9) that are equipped with on barrel (1) inner wall, fixed rack (10) that are equipped with in ring (9) top, rack (10) top and with rack (10) mesh mutually are located in first gear (8), horizontal pole (7) outside is equipped with a plurality of hybrid unit, and is a plurality of hybrid unit all locates inside mixing frame (5), hybrid unit includes first sleeve (11), horizontal pole (7) outside is fixed to be located in first sleeve (11), first sleeve (11) external fixation is equipped with a plurality of hybrid rod (12).
6. The apparatus for preparing low-smoke, low-heat-release flame-retardant polyolefin according to claim 5, wherein: mixing mechanism still advances the subassembly including advancing, it is used for advancing barrel (1) inside raw materials to advance the subassembly, it includes montant (13) to advance the subassembly, montant (13) are fixed to be located and are mixed frame (5) bottom, montant (13) external fixation is equipped with second sleeve (14), second sleeve (14) external fixation is equipped with a plurality of first flabellums (15), montant (13) external fixation is equipped with first scraper blade (16), first scraper blade (16) bottom contacts with hot plate (6) top.
7. The apparatus for preparing low-smoke, low-heat-release flame-retardant polyolefin according to claim 6, wherein: transport mechanism includes second motor (17), second motor (17) are fixed to be located box (2) one side, second motor (17) are through output shaft fixedly connected with axis of rotation (18), axis of rotation (18) run through box (2) and extend into inside box (2), axis of rotation (18) external fixation is equipped with plectane (19), circulation groove (20) have been seted up on plectane (19), logical groove (21) have been seted up to barrel (1) bottom, plectane (19) top is run through logical groove (21) and is extended into inside barrel (1), axis of rotation (18) external fixation is equipped with second gear (22), montant (13) run through hot plate (6) and extend into hot plate (6) bottom, montant (13) are connected through the bearing with hot plate (6), montant (13) external fixation is equipped with second scraper blade (23), second scraper blade (23) top contacts bottom hot plate (6), montant (13) external fixation is equipped with a plurality of second flabellum (24).
8. The apparatus for preparing low-smoke, low-heat-release flame-retardant polyolefin according to claim 7, wherein: box (2) inside is equipped with two and breaks up the subassembly, it is used for breaking up the inside raw materials of box (2), two to break up the subassembly and locate axis of rotation (18) both sides respectively, it includes pivot (25) to break up the subassembly, axis of rotation (18) one side is located in pivot (25), pivot (25) external fixation is equipped with third gear (26), second gear (22) one side and meshing mutually with second gear (22) are located in third gear (26), pivot (25) external fixation is equipped with a plurality of links pole (27), box (2) internal fixation is equipped with supporting network (28), supporting network (28) top is equipped with filter membrane (29), fixed frame (30) that are equipped with in supporting network (28) top, second gear (22) and third gear (26) are all located inside fixed frame (30).
9. The apparatus for preparing low smoke, low heat release flame retardant polyolefin of claim 8, wherein: box (2) one side is fixed to be equipped with discharging pipe (31), it has ventilation net (32) to inlay on discharging pipe (31), axis of rotation (18) run through ventilation net (32) and are connected through the bearing with ventilation net (32), axis of rotation (18) external fixation is equipped with a plurality of third flabellums (33), discharging pipe (31) outside is located in third flabellum (33), axis of rotation (18) external fixation is equipped with a plurality of third scraper blades (34), and is a plurality of discharging pipe (31) is located in third scraper blade (34) inside and is contacted with ventilation net (32) one side, discharging pipe (31) internal fixation is equipped with water conservancy diversion otter board (35), axis of rotation (18) run through water conservancy diversion otter board (35), discharging pipe (31) one side is fixed and is equipped with connection frame (36).
10. The apparatus for preparing low smoke, low heat release flame retardant polyolefin of claim 9, wherein: box (2) one side is equipped with negative pressure pump (37), negative pressure pump (37) one side is fixed and is equipped with connecting pipe (38), connecting pipe (38) extend into inside box (2), box (2) one side is fixed and is equipped with first supporting seat (39), negative pressure pump (37) are fixed and are located first supporting seat (39) top, box (2) one side is fixed and is equipped with second supporting seat (40), second motor (17) are fixed and are located second supporting seat (40) top, barrel (1) top is fixed and is equipped with feeder hopper (41), barrel (1) top is fixed and is equipped with protective frame (42), first motor (3) are fixed and are located inside protective frame (42), box (2) one side is fixed and is equipped with outlet pipe (43), outlet pipe (43) external fixation is equipped with solenoid valve (44), box (2) bottom is fixed and is equipped with two backup pads (45).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211633317.XA CN115651290B (en) | 2022-12-19 | 2022-12-19 | Preparation method and device of low-smoke low-heat release flame-retardant polyolefin |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211633317.XA CN115651290B (en) | 2022-12-19 | 2022-12-19 | Preparation method and device of low-smoke low-heat release flame-retardant polyolefin |
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| CN115651290B (en) | 2023-06-06 |
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