CN110628115A - Novel polyethylene foam board and preparation method thereof - Google Patents
Novel polyethylene foam board and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a novel polyethylene foam board and a preparation method thereof, wherein the foam board is prepared from the following raw materials in parts by weight: POE3-8 parts, regenerated high-density polyethylene 25-35 parts, regenerated EVA material 15-20 parts, regenerated low-density polyethylene 22-30 parts, heavy calcium carbonate 15-22 parts, zinc oxide 0.8-1.4 parts, zinc stearate 0.3-1 part and EBS lubricant 0.5-1.5 parts. According to the novel polyethylene foam board, the activated heavy calcium carbonate is added into the foam board, so that the inertia of the foam board is large, chemical reaction is not easy to occur, the heat resistance and the cold resistance of the foam board are improved, the influence of the external environment is low, the deformation caused by temperature change is avoided, the tensile strength and the rigidity of the polyethylene foam board can be improved through mixing and extruding of various raw materials, the polyethylene foam board is not easy to damage and has a better use effect, the produced foam board is more uniform, the situation of different position strengths is avoided, and the use safety of the foam board can be improved.
Description
Technical Field
The invention relates to the field of building materials, in particular to a novel polyethylene foam board and a preparation method thereof.
Background
The foaming board is a building material, is often used for ceilings of passenger cars and train carriages, box core layers, interior decoration boards, external wall boards of buildings and the like, and along with the continuous development of the society, the requirements of people on the foaming board are higher and higher, and the existing foaming board can not meet the requirements of users;
the high temperature resistant and low temperature resistant ability when current polyethylene foaming board uses is not strong, and long-time the use can lead to whole polyethylene foaming board the condition that warp to appear, the incident appears easily, and this brings certain potential safety hazard for the use of foaming board, and secondly, the tensile strength and the rigidity of current polyethylene foaming board are not high, receive great impact easy damage during the use, unsatisfied people's operation requirement, for this reason, we have proposed a novel polyethylene foaming board.
Disclosure of Invention
The invention mainly aims to provide a novel polyethylene foam board and a preparation method thereof, which can effectively solve the problems in the background art.
In order to achieve the purpose, the invention adopts the technical scheme that:
a novel polyethylene foam board is prepared from the following raw materials in parts by weight: 3-8 parts of polyolefin elastomer (POE), 25-35 parts of regenerated high-density polyethylene, 15-20 parts of regenerated ethylene-vinyl acetate copolymer (EVA), 22-30 parts of regenerated low-density polyethylene, 15-22 parts of ground limestone, 0.8-1.4 parts of zinc oxide, 0.3-1 part of zinc stearate and 0.5-1.5 parts of Ethylene Bis Stearamide (EBS) lubricant.
Preferably, the adhesive comprises, by weight, 4-6 parts of POE, 28-32 parts of regenerated high-density polyethylene, 16-19 parts of regenerated EVA material, 24-28 parts of regenerated low-density polyethylene, 17-19 parts of ground calcium carbonate, 0.9-1.2 parts of zinc oxide, 0.4-0.7 part of zinc stearate and 0.7-1.1 parts of EBS lubricant.
Preferably, the lubricant comprises, by weight, 5 parts of POE, 30 parts of regenerated high-density polyethylene, 18 parts of regenerated EVA material, 26 parts of regenerated low-density polyethylene, 18.5 parts of ground calcium carbonate, 1 part of zinc oxide, 0.5 part of zinc stearate and 1 part of EBS lubricant.
Preferably, the content of the heptanes in the regenerated high-density polyethylene is 22%, the melt index of the regenerated high-density polyethylene is 0.7-1g/10min, the melt index of the regenerated low-density polyethylene is 0.7g/10min, and the melt index of the POE is 1g/10 min.
Preferably, the fineness of the heavy calcium carbonate is 1250-2000 meshes, the melt index of the regenerated EVA material is 3g/10min, and the purity of the regenerated EVA material is 98-100%.
A preparation method of a novel polyethylene foam board comprises the following specific steps:
(1) and (3) raw material treatment: sequentially feeding POE, regenerated high-density polyethylene, a regenerated EVA material, regenerated low-density polyethylene and ground calcium carbonate into screening equipment and washing equipment for screening and washing, and feeding the POE, the regenerated high-density polyethylene, the regenerated EVA material, the regenerated low-density polyethylene and the ground calcium carbonate into microwave vacuum drying equipment for microwave vacuum low-temperature drying;
(2) and mixing raw materials: putting the low-temperature dried raw materials into a mixer for mixing, and adding zinc oxide, zinc stearate and an EBS lubricant into the mixer;
(3) extruding and granulating: preheating the mixed raw materials, then sending the preheated raw materials into a double-screw extruder for extrusion, and sending the extruded raw materials into a granulator for granulation;
(4) and injection molding: feeding the granulated raw materials into an injection molding machine for injection molding to obtain a plate;
(5) and foaming the plate: high-density polyethylene is used as a surface layer of the plate, and then the plate is sent into a supercritical CO2 foaming autoclave for foaming to obtain the polyethylene foaming plate.
Preferably, in the step (1), during washing, the raw materials are poured into an ultrasonic cleaning machine for cleaning for 20-30 minutes, and the cleaning temperature is 25-35 ℃.
Preferably, in the step (1), the temperature of the microwave vacuum low-temperature drying is 35-50 ℃, the time of the microwave vacuum low-temperature drying is 4-6 hours, and the heavy calcium carbonate is activated by adopting wet surface treatment after drying.
Preferably, in the step (3), the mixed raw material is preheated to 42-48 ℃ for extrusion, and the extruded raw material is sent to a granulator for granulation after the temperature of the extruded raw material is reduced to 25-35 ℃.
Compared with the prior art, the invention has the following beneficial effects:
1. the activated heavy calcium carbonate is added into the foaming plate, so that the foaming plate has high inertia, is not easy to generate chemical reaction, improves the heat resistance and cold resistance of the foaming plate, is less influenced by the external environment, and cannot deform due to temperature change;
2. impurities in the raw materials are removed through ultrasonic cleaning equipment, and then the raw materials are subjected to microwave vacuum low-temperature drying, so that the temperature of the raw materials is lower during drying, the chemical change of the raw materials is reduced, and the raw materials are uniformly heated during drying through the microwave vacuum low-temperature drying, so that the produced foaming plate is more uniform, and the condition of different positions and different strengths cannot occur;
3. through POE, regeneration high density polyethylene, regeneration EVA material, regeneration low density polyethylene and heavy calcium carbonate's compounding extrusion, can improve the tensile strength and the rigidity of polyethylene foaming board, not fragile, the result of use is better.
Drawings
Fig. 1 is an overall process flow diagram of a novel polyethylene foam board preparation method of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Example 1
A novel polyethylene foam board is prepared from the following raw materials in parts by weight: POE3 parts, regenerated high-density polyethylene 28 parts, regenerated EVA material 16 parts, regenerated low-density polyethylene 24 parts, ground limestone 17 parts, zinc oxide 0.9 part, zinc stearate 0.4 part and EBS lubricant 0.7 part.
The content of the heptanes powder in the regenerated high-density polyethylene is 22%, the melt index of the regenerated high-density polyethylene is 0.8g/10min, the melt index of the regenerated low-density polyethylene is 0.7g/10min, and the melt index of POE is 1g/10 min.
The fineness of the heavy calcium carbonate is 1250 meshes, the melt index of the regenerated EVA material is 3g/10min, and the purity of the regenerated EVA material is 99%.
A preparation method of a novel polyethylene foam board comprises the following specific steps:
(1) and (3) raw material treatment: sequentially feeding POE, regenerated high-density polyethylene, a regenerated EVA material, regenerated low-density polyethylene and ground calcium carbonate into screening equipment and washing equipment for screening and washing, pouring all raw materials into an ultrasonic cleaning machine for cleaning for 25 minutes at the cleaning temperature of 30 ℃, feeding the POE, the regenerated high-density polyethylene, the regenerated EVA material, the regenerated low-density polyethylene and the ground calcium carbonate into microwave vacuum drying equipment for microwave vacuum low-temperature drying at the microwave vacuum low-temperature drying temperature of 40 ℃ for 5 hours after washing, and activating the ground calcium carbonate by adopting wet surface treatment after drying;
(2) and mixing raw materials: putting the low-temperature dried raw materials into a mixer for mixing, and adding zinc oxide, zinc stearate and an EBS lubricant into the mixer;
(3) extruding and granulating: preheating the mixed raw materials, preheating the mixed raw materials to 45 ℃ for extrusion, then sending the preheated raw materials into a double-screw extruder for extrusion, sending the extruded raw materials into a granulator for granulation after the temperature of the extruded raw materials is reduced by 30 ℃, and sending the extruded raw materials into the granulator for granulation;
(4) and injection molding: feeding the granulated raw materials into an injection molding machine for injection molding to obtain a plate;
(5) and foaming the plate: high-density polyethylene is used as a surface layer of the plate, and then the plate is sent into a supercritical CO2 foaming autoclave for foaming to obtain the polyethylene foaming plate.
Example 2
A novel polyethylene foam board is prepared from the following raw materials in parts by weight: POE6 parts, regenerated high-density polyethylene 32 parts, regenerated EVA material 19 parts, regenerated low-density polyethylene 28 parts, ground limestone 19 parts, zinc oxide 1.2 parts, zinc stearate 0.7 part and EBS lubricant 1.1 part.
The content of the heptanes powder in the regenerated high-density polyethylene is 22%, the melt index of the regenerated high-density polyethylene is 0.8g/10min, the melt index of the regenerated low-density polyethylene is 0.7g/10min, and the melt index of POE is 1g/10 min.
The fineness of the heavy calcium carbonate is 1250 meshes, the melt index of the regenerated EVA material is 3g/10min, and the purity of the regenerated EVA material is 99%.
A preparation method of a novel polyethylene foam board comprises the following specific steps:
(1) and (3) raw material treatment: sequentially feeding POE, regenerated high-density polyethylene, a regenerated EVA material, regenerated low-density polyethylene and ground calcium carbonate into screening equipment and washing equipment for screening and washing, pouring all raw materials into an ultrasonic cleaning machine for cleaning for 25 minutes at the cleaning temperature of 30 ℃, feeding the POE, the regenerated high-density polyethylene, the regenerated EVA material, the regenerated low-density polyethylene and the ground calcium carbonate into microwave vacuum drying equipment for microwave vacuum low-temperature drying at the microwave vacuum low-temperature drying temperature of 40 ℃ for 5 hours after washing, and activating the ground calcium carbonate by adopting wet surface treatment after drying;
(2) and mixing raw materials: putting the low-temperature dried raw materials into a mixer for mixing, and adding zinc oxide, zinc stearate and an EBS lubricant into the mixer;
(3) extruding and granulating: preheating the mixed raw materials, preheating the mixed raw materials to 45 ℃ for extrusion, then sending the preheated raw materials into a double-screw extruder for extrusion, sending the extruded raw materials into a granulator for granulation after the temperature of the extruded raw materials is reduced by 30 ℃, and sending the extruded raw materials into the granulator for granulation;
(4) and injection molding: feeding the granulated raw materials into an injection molding machine for injection molding to obtain a plate;
(5) and foaming the plate: high-density polyethylene is used as a surface layer of the plate, and then the plate is sent into a supercritical CO2 foaming autoclave for foaming to obtain the polyethylene foaming plate.
Example 3
A novel polyethylene foam board is prepared from the following raw materials in parts by weight: POE5 parts, regenerated high-density polyethylene 30 parts, regenerated EVA material 18 parts, regenerated low-density polyethylene 26 parts, heavy calcium carbonate 18.5 parts, zinc oxide 1 part, zinc stearate 0.5 part and EBS lubricant 1 part.
The content of the heptanes powder in the regenerated high-density polyethylene is 22%, the melt index of the regenerated high-density polyethylene is 0.8g/10min, the melt index of the regenerated low-density polyethylene is 0.7g/10min, and the melt index of POE is 1g/10 min.
The fineness of the heavy calcium carbonate is 1250 meshes, the melt index of the regenerated EVA material is 3g/10min, and the purity of the regenerated EVA material is 99%.
A preparation method of a novel polyethylene foam board comprises the following specific steps:
(1) and (3) raw material treatment: sequentially feeding POE, regenerated high-density polyethylene, a regenerated EVA material, regenerated low-density polyethylene and ground calcium carbonate into screening equipment and washing equipment for screening and washing, pouring all raw materials into an ultrasonic cleaning machine for cleaning for 25 minutes at the cleaning temperature of 30 ℃, feeding the POE, the regenerated high-density polyethylene, the regenerated EVA material, the regenerated low-density polyethylene and the ground calcium carbonate into microwave vacuum drying equipment for microwave vacuum low-temperature drying at the microwave vacuum low-temperature drying temperature of 40 ℃ for 5 hours after washing, and activating the ground calcium carbonate by adopting wet surface treatment after drying;
(2) and mixing raw materials: putting the low-temperature dried raw materials into a mixer for mixing, and adding zinc oxide, zinc stearate and an EBS lubricant into the mixer;
(3) extruding and granulating: preheating the mixed raw materials, preheating the mixed raw materials to 45 ℃ for extrusion, then sending the preheated raw materials into a double-screw extruder for extrusion, sending the extruded raw materials into a granulator for granulation after the temperature of the extruded raw materials is reduced by 30 ℃, and sending the extruded raw materials into the granulator for granulation;
(4) and injection molding: feeding the granulated raw materials into an injection molding machine for injection molding to obtain a plate;
(5) and foaming the plate: high-density polyethylene is used as a surface layer of the plate, and then the plate is sent into a supercritical CO2 foaming autoclave for foaming to obtain the polyethylene foaming plate.
Example 4
A novel polyethylene foam board is prepared from the following raw materials in parts by weight: POE5 parts, regenerated high-density polyethylene 30 parts, regenerated EVA material 18 parts, regenerated low-density polyethylene 26 parts, ground limestone 17 parts, zinc oxide 1 part, zinc stearate 0.5 part and EBS lubricant 1 part.
The content of the heptanes powder in the regenerated high-density polyethylene is 22%, the melt index of the regenerated high-density polyethylene is 0.8g/10min, the melt index of the regenerated low-density polyethylene is 0.7g/10min, and the melt index of POE is 1g/10 min.
The fineness of the heavy calcium carbonate is 1250 meshes, the melt index of the regenerated EVA material is 3g/10min, and the purity of the regenerated EVA material is 99%.
A preparation method of a novel polyethylene foam board comprises the following specific steps:
(1) and (3) raw material treatment: sequentially feeding POE, regenerated high-density polyethylene, a regenerated EVA material, regenerated low-density polyethylene and ground calcium carbonate into screening equipment and washing equipment for screening and washing, pouring all raw materials into an ultrasonic cleaning machine for cleaning for 25 minutes at the cleaning temperature of 30 ℃, feeding the POE, the regenerated high-density polyethylene, the regenerated EVA material, the regenerated low-density polyethylene and the ground calcium carbonate into microwave vacuum drying equipment for microwave vacuum low-temperature drying at the microwave vacuum low-temperature drying temperature of 40 ℃ for 5 hours after washing, and activating the ground calcium carbonate by adopting wet surface treatment after drying;
(2) and mixing raw materials: putting the low-temperature dried raw materials into a mixer for mixing, and adding zinc oxide, zinc stearate and an EBS lubricant into the mixer;
(3) extruding and granulating: preheating the mixed raw materials, preheating the mixed raw materials to 45 ℃ for extrusion, then sending the preheated raw materials into a double-screw extruder for extrusion, sending the extruded raw materials into a granulator for granulation after the temperature of the extruded raw materials is reduced by 30 ℃, and sending the extruded raw materials into the granulator for granulation;
(4) and injection molding: feeding the granulated raw materials into an injection molding machine for injection molding to obtain a plate;
(5) and foaming the plate: the high-density polyethylene is adopted as the surface layer of the plate, and then the plate is sent into a supercritical CO2 foaming autoclave for foaming to obtain the polyethylene foam plate example 5
A novel polyethylene foam board is prepared from the following raw materials in parts by weight: POE5 parts, regenerated high-density polyethylene 30 parts, regenerated EVA material 18 parts, regenerated low-density polyethylene 26 parts, ground limestone 19 parts, zinc oxide 1 part, zinc stearate 0.5 part and EBS lubricant 1 part.
The content of the heptanes powder in the regenerated high-density polyethylene is 22%, the melt index of the regenerated high-density polyethylene is 0.8g/10min, the melt index of the regenerated low-density polyethylene is 0.7g/10min, and the melt index of POE is 1g/10 min.
The fineness of the heavy calcium carbonate is 1250 meshes, the melt index of the regenerated EVA material is 3g/10min, and the purity of the regenerated EVA material is 99%.
A preparation method of a novel polyethylene foam board comprises the following specific steps:
(1) and (3) raw material treatment: sequentially feeding POE, regenerated high-density polyethylene, a regenerated EVA material, regenerated low-density polyethylene and ground calcium carbonate into screening equipment and washing equipment for screening and washing, pouring all raw materials into an ultrasonic cleaning machine for cleaning for 25 minutes at the cleaning temperature of 30 ℃, feeding the POE, the regenerated high-density polyethylene, the regenerated EVA material, the regenerated low-density polyethylene and the ground calcium carbonate into microwave vacuum drying equipment for microwave vacuum low-temperature drying at the microwave vacuum low-temperature drying temperature of 40 ℃ for 5 hours after washing, and activating the ground calcium carbonate by adopting wet surface treatment after drying;
(2) and mixing raw materials: putting the low-temperature dried raw materials into a mixer for mixing, and adding zinc oxide, zinc stearate and an EBS lubricant into the mixer;
(3) extruding and granulating: preheating the mixed raw materials, preheating the mixed raw materials to 45 ℃ for extrusion, then sending the preheated raw materials into a double-screw extruder for extrusion, sending the extruded raw materials into a granulator for granulation after the temperature of the extruded raw materials is reduced by 30 ℃, and sending the extruded raw materials into the granulator for granulation;
(4) and injection molding: feeding the granulated raw materials into an injection molding machine for injection molding to obtain a plate;
(5) and foaming the plate: adopting high-density polyethylene as a surface layer of a plate, and then feeding the plate into a supercritical CO2 foaming autoclave for foaming to obtain a polyethylene foamed plate
In table 1, examples 1 to 3 are foamed sheets produced at different raw material ratios, compared with the existing polyethylene foamed sheet parameters, and examples 3 to 5 in table 2 have a single variable, the content of heavy calcium carbonate is changed, products are produced according to examples 1 to 5, and the respective qualities are tested, and the test results are as follows:
TABLE 1
TABLE 2
From the experimental data in tables 1 and 2, it can be seen that the mechanical strength and heat resistance of the novel polyethylene foam board of the present invention can be greatly improved by adding the ground calcium carbonate, because the ground calcium carbonate itself has good thermal stability and does not decompose at a temperature below 400 ℃, and the hydrophobic property of the novel polyethylene foam board can be greatly improved by activating the ground calcium carbonate, as can be seen from table 2, before the ground calcium carbonate is added to 18.5 parts, the thermal stability and tear strength of the foam board are continuously increased, and after the content of the ground calcium carbonate exceeds 18.5 parts, the thermal stability and tear strength of the foam board are continuously decreased, and along with the increase of the content of the ground calcium carbonate, the tensile strength of the foam board is continuously increased, and in combination with economic and comprehensive considerations, example 3 is the optimal choice.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The novel polyethylene foam board is characterized by being prepared from the following raw materials in parts by weight: 3-8 parts of polyolefin elastomer, 25-35 parts of regenerated high-density polyethylene, 15-20 parts of regenerated ethylene-vinyl acetate copolymer material, 22-30 parts of regenerated low-density polyethylene, 15-22 parts of heavy calcium carbonate, 0.8-1.4 parts of zinc oxide, 0.3-1 part of zinc stearate and 0.5-1.5 parts of ethylene bis stearamide lubricant.
2. The novel polyethylene foam board according to claim 1, wherein: 4-6 parts of polyolefin elastomer, 28-32 parts of regenerated high-density polyethylene, 16-19 parts of regenerated ethylene-vinyl acetate copolymer material, 24-28 parts of regenerated low-density polyethylene, 17-19 parts of heavy calcium carbonate, 0.9-1.2 parts of zinc oxide, 0.4-0.7 part of zinc stearate and 0.7-1.1 part of ethylene bis-stearamide lubricant.
3. The novel polyethylene foam board according to claim 1, wherein: 5 parts of polyolefin elastomer, 30 parts of regenerated high-density polyethylene, 18 parts of regenerated ethylene-vinyl acetate copolymer material, 26 parts of regenerated low-density polyethylene, 18.5 parts of heavy calcium carbonate, 1 part of zinc oxide, 0.5 part of zinc stearate and 1 part of ethylene bis-stearamide lubricant.
4. A novel polyethylene foam board according to any one of claims 1-3, characterized in that: the content of the heptanes in the regenerated high-density polyethylene is 22%, the melt index of the regenerated high-density polyethylene is 0.7-1g/10min, the melt index of the regenerated low-density polyethylene is 0.7g/10min, and the melt index of the polyolefin elastomer is 1g/10 min.
5. A novel polyethylene foam board according to any one of claims 1-3, characterized in that: the fineness of the heavy calcium carbonate is 1250-2000 meshes, the melt index of the regenerated ethylene-vinyl acetate copolymer material is 3g/10min, and the purity of the regenerated ethylene-vinyl acetate copolymer material is 98-100%.
6. The preparation method of the novel polyethylene foam board according to any one of claims 1 to 3, characterized by comprising the following specific steps:
(1) and (3) raw material treatment: sequentially feeding the polyolefin elastomer, the regenerated high-density polyethylene, the regenerated ethylene-vinyl acetate copolymer material, the regenerated low-density polyethylene and the ground calcium carbonate into screening equipment and washing equipment for screening and washing, and feeding the polyolefin elastomer, the regenerated high-density polyethylene, the regenerated ethylene-vinyl acetate copolymer material, the regenerated low-density polyethylene and the ground calcium carbonate into microwave vacuum drying equipment for microwave vacuum low-temperature drying;
(2) and mixing raw materials: putting the raw materials dried at low temperature into a mixer for mixing, and adding zinc oxide, zinc stearate and ethylene bis stearamide lubricant into the mixer;
(3) extruding and granulating: preheating the mixed raw materials, then sending the preheated raw materials into a double-screw extruder for extrusion, and sending the extruded raw materials into a granulator for granulation;
(4) and injection molding: feeding the granulated raw materials into an injection molding machine for injection molding to obtain a plate;
(5) and foaming the plate: high-density polyethylene is used as a surface layer of the plate, and then the plate is sent into a supercritical CO2 foaming autoclave for foaming to obtain the polyethylene foaming plate.
7. The method for preparing a novel polyethylene foam board according to claim 6, wherein the method comprises the following steps: in the step (1), during washing, all the raw materials are poured into an ultrasonic cleaning machine for cleaning for 20-30 minutes at the cleaning temperature of 25-35 ℃.
8. The method for preparing a novel polyethylene foam board according to claim 6, wherein the method comprises the following steps: in the step (1), the temperature of microwave vacuum low-temperature drying is 35-50 ℃, the time of microwave vacuum low-temperature drying is 4-6 hours, and the heavy calcium carbonate is activated by adopting wet surface treatment after drying.
9. The method for preparing a novel polyethylene foam board according to claim 6, wherein the method comprises the following steps: in the step (3), the mixed raw materials are preheated to 42-48 ℃ for extrusion, and the extruded raw materials are sent into a granulator for granulation after the temperature of the extruded raw materials is reduced to 25-35 ℃.
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