CN104163965B - The preparation method of the PE modified macromolecular material of the raw matter of a kind of diatomite/sugarcane - Google Patents
The preparation method of the PE modified macromolecular material of the raw matter of a kind of diatomite/sugarcane Download PDFInfo
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- CN104163965B CN104163965B CN201310180627.5A CN201310180627A CN104163965B CN 104163965 B CN104163965 B CN 104163965B CN 201310180627 A CN201310180627 A CN 201310180627A CN 104163965 B CN104163965 B CN 104163965B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/08—Ingredients agglomerated by treatment with a binding agent
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
A preparation method for the PE modified macromolecular material of the raw matter of diatomite/sugarcane, belongs to biomass modified field of material technology.Concrete preparation method's step is: mix after microfine diatomaceous drying with ethanol, ultrasonic disperse, then add properties-correcting agent, mechanical stirring, centrifugation, is separated the solid product vacuum-drying 1 ~ 24h obtained, obtains modification infusorial earth; Or properties-correcting agent is directly mixed with ethanol, then mixed solution is evenly sprayed at the diatomite surface of cooling, obtain modification infusorial earth, raw to modification infusorial earth and sugarcane matter polyethylene is added blended in mixing roll after, finally make diatomite/sugarcane raw matter polythene material particle.Advantage of the present invention is: the natural characteristic such as utilize diatomaceous specific surface area large, high temperature resistant, function of odor removal and strength optimization there is lifting again, and adding the heat-resistant aging of material, is really green, environmental protection, low-carbon (LC), multi-functional, cheap modified polymer material.
Description
Technical field
The invention belongs to biomass modified field of material technology, be specifically related to the preparation method of the PE modified macromolecular material of the raw matter of a kind of diatomite/sugarcane.
Background technology
At present, diatomite filled polyethylene plastics, suitably can increase the intensity of material, improve the work-ing life of material, be widely used in every field and pay close attention to, in the bibliographical information of the preparation method of diatomite/polyethylene composite plastic, Chinese patent [201210424047.1] discloses the preparation method of a kind of modification infusorial earth/polyethylene composite plastic, its starting material adopt traditional polyethylene, because polyethylene all derives from non-renewable petroleum resources, many carbon, cycle in work-ing life is short, the relative heat-resistant aging of polyethylene is poor simultaneously, strength of materials poor performance, do not possess any functional, and be unsuitable for environmental protection, have pollution to air, production cost is high.
Summary of the invention
There is shortcoming and defect for prior art, the invention provides the preparation method of the PE modified macromolecular material of the raw matter of a kind of diatomite/sugarcane, object is by interface fusion, reaches the performance requriements of functional living being matter macromolecular material.Utilize diatomaceous adsorption function, and by the photosynthesis of sugarcane, catch the poly feature of the raw matter of carbon manufacture in air, make namely to have and be better than conventional polyvinyl characteristic, have again simultaneously taste ability of inhaling, at a low price, green macromolecular material.
The technical scheme realizing the object of the invention comprises the steps:
(1) diatomite ore is selected, after auxiliary agent method, add 4% ~ 8% sodium carbonate, temperature controls at 1100 DEG C, time carried out roast at 10 ~ 25 minutes, utilized machinery mill and airflow milling to be machined to median size≤1 μm, then was put in 95 ~ 155 DEG C of dryings 2 ~ 6 hours, be cooled to 20-25 DEG C and obtain microfine diatomaceous powder, carry out modification according to the one in following two kinds of modes:
A () takes a certain amount of cooled microfine diatomaceous powder in the ethanolic soln of 95%, then properties-correcting agent is added, ultrasonic disperse 20 ~ 70 minutes, in 25 ~ 50 DEG C of mechanic whirl-nett reaction 2 ~ 4h, centrifugation again, the solid product obtained, at 120 ~ 170 DEG C of vacuum-drying 1 ~ 24h, obtains modification infusorial earth; Wherein the concentration of microfine diatomaceous powder in ethanolic soln is 0.2 ~ 0.6g/mL, and the add-on of properties-correcting agent is 3 ~ 15% of microfine diatomaceous powder weight;
B properties-correcting agent directly mixes with ethanol by (), be hydrolyzed at least 1h and make mixed solution, then mixed solution is evenly sprayed at microfine diatomaceous powder surface, then stir at least 30 minutes under 1500 ~ 3500rpm condition, last in 110 DEG C of vacuum-drying at least 8h, obtain modification infusorial earth; It is according to volume ratio 1:(15 ~ 25 that described properties-correcting agent mixes with ethanol) mix, the fountain height of mixed solution is 3 ~ 15% of microfine diatomaceous powder weight in properties-correcting agent in mixed solution;
(2) above-mentioned modification infusorial earth and the raw matter polyethylene of sugarcane are added in mixing roll, setting mixing roll leading portion, interlude, back segment temperature are identical, and be 105 ~ 145 DEG C, under 20 ~ 110rpm rotating speed after blended 10 ~ 55 minutes, under closed environment, screw extrusion press is sent to through forced feed system, and by water ring pelletizing-air-dry-auto-filling process, finally make diatomite/sugarcane raw matter polythene material particle.
In described step (2), modification infusorial earth add-on is gross weight 10 ~ 50wt.%, and the poly add-on of the raw matter of sugarcane is gross weight 50 ~ 90wt.%.
Described properties-correcting agent adopts ethyl polysilicate Si28-ZQ-342-Si32, γ-aminopropyl triethoxysilane (KH-550) or n-propyl-triethoxysilicane ZQ-701.
Feature of the present invention and beneficial effect are:
Mainly utilize the raw matter polyethylene of green plastic sugarcane and diatomaceous load technology, by interface fusion, reach the performance requriements of functional living being matter macromolecular material.Utilize diatomaceous adsorption function, and by the photosynthesis of sugarcane, catch the poly feature of the raw matter of carbon manufacture in air, make namely to have and be better than conventional polyvinyl characteristic, have again simultaneously taste ability of inhaling, at a low price, green macromolecular material.
1, be that biological polyethylene prepared by main raw material extraction sugarcane ethanol technology has pollution-free with sugarcane, complete petroleum replacing resource and reproducible characteristic.
2, utilize diatomite to have the natural characteristic of adsorptive power and biomass polyethylene mixed and modified, diatomaceous adding proportion is between 10%-50%, preparation has adsorbing Green Polymer Material, while meeting polyethylene characteristic needs, possess function of odor removal, promote the strength of materials and heat-resistant aging.
3, compared with traditional vinyl polymer material, there is powerful cost advantage and functionality advantage, the use needs of every field to polythene material can be met, and petroleum resources can be saved completely.
Advantage of the present invention is: the polyethylene being raw material with sugarcane ethanol, and its intensity, rigidity and the transparency are all better than the polyethylene of petroleum refining, and substitutes non-renewable petroleum resources.In addition by with diatomaceous modification technology, the natural characteristic such as utilize diatomaceous specific surface area large, high temperature resistant, function of odor removal and strength optimization there is lifting again, and adding the heat-resistant aging of material, is really green, environmental protection, low-carbon (LC), multi-functional, cheap modified polymer material.
Embodiment
The particle mixing roll model adopted in the embodiment of the present invention is: XN-75, buys from Nanjing Chi Kai Machinery Co., Ltd. (China);
The universal testing machine adopted the performance test of diatom sugarcane raw matter Polymer Mechanical in the embodiment of the present invention is that sea, Jinan Weir instrument limited liability company produces, model is: WDS-50, and testing method is according to standard GB/T/T1040.2-2006 " the mensuration part 2 of plastic tensile performance: the test conditions of molding and extrusion molding plastics ";
The properties-correcting agent adopted in the embodiment of the present invention is the analytical reagent of Shanghai Bo Jing Chemical Co., Ltd.;
Diatomite in the embodiment of the present invention comes from area, Changbai;
The forced feed machine that forced feed system in the embodiment of the present invention adopts is the golden promise 800 type forced feed machine that Rui'an City Jin Nuo rubber and plastics machine company limited manufactures;
The raw matter polyethylene of the sugarcane selected in the embodiment of the present invention is Brazilian BRASKEM Products, and density is 0.95g/cm3;
The equipment that in the embodiment of the present invention, under high rotating speed, centrifugation adopts is that the Joyce ~ 1000N centrifugal separation equipment prolonging mechanical Science and Technology Ltd. is put down in Shanghai, and working speed is at 3500 ~ 4500r/min;
The screw extrusion press working parameter adopted in the embodiment of the present invention is: main engine power 75kw, feeding power 45kw, negative pressure of vacuum 10
5~ 10
2pa, temperature control positive and negative values 80 ~ 100 degrees Celsius;
In the embodiment of the present invention, vacuum drying vacuum tightness is 10
5~ 10
2pa;
The equipment that in the embodiment of the present invention, ultrasonic disperse adopts is the JL-360DTH type ultrasonic apparatus of Shanghai Ji Li ultrasonic instrument company limited, and operating frequency is 28KHZ;
The molecular weight of the diatomite obtained in the embodiment of the present invention/sugarcane raw matter polythene material particle is 40000 ~ 300000Dalton, elongation at break 245 ~ 315%, tensile strength: 21 ~ 31mPa;
In the embodiment of the present invention, the roasting of auxiliary agent method is routine techniques, adds sodium bicarbonate, and temperature is at 1100 degrees Celsius of roasts.
Below in conjunction with specific embodiment, set forth the present invention further.These embodiments are only not used in restriction range of application of the present invention for illustration of the present invention.To these equivalent form of values such as the present invention make various changes or modifications equally in the application's appended claims limited range.
Embodiment 1
By diatomite ore after auxiliary agent method, add 4% sodium carbonate, temperature controls at 1100 DEG C, time carried out roast at 10 ~ 15 minutes, after utilizing machinery mill and airflow milling processing, be machined to median size≤1 μm, be put in baking oven in 95 ~ 155 DEG C of dryings 2 hours, be cooled to 20 DEG C and obtain microfine diatomaceous powders;
By microfine diatomaceous powder in the ethanolic soln of 95%, then properties-correcting agent ethyl polysilicate Si28-ZQ-342-Si32 is added, ultrasonic disperse 20 minutes, then mechanic whirl-nett reaction 2h under 50 DEG C of conditions, centrifugation again, the solid product obtained, at 120 ~ 170 DEG C of vacuum-drying 24h, obtains modification infusorial earth; Wherein the blending ratio of microfine diatomaceous powder and ethanolic soln is 0.2g/mL ethanolic soln, and the add-on of properties-correcting agent is 15% of microfine diatomaceous powder weight;
Above-mentioned modification infusorial earth and the raw matter polyethylene of sugarcane are added in mixing roll, modification infusorial earth accounts for 10% of whole material gross weight, the raw matter polyethylene of sugarcane accounts for 90% of gross weight, setting mixing roll leading portion, interlude, back segment temperature is 105 DEG C, under 20rpm rotating speed after blended 55 minutes, under closed environment, screw extrusion press is sent to through forced feed system, and by water ring pelletizing-air-dry-auto-filling process, finally make diatomite/sugarcane raw matter polythene material particle, molecular weight 40000 ~-300000Dalton, its elongation at break 284%, tensile strength: 31mPa.
Embodiment 2
By diatomite ore after auxiliary agent method, add 6% sodium carbonate, temperature controls at 1100 DEG C, time carried out roast at 12 ~ 17 minutes, after utilizing machinery mill and airflow milling processing, was machined to median size≤1 μm, be put in 95 ~ 155 DEG C of dryings 4 hours, be cooled to 25 DEG C and obtain microfine diatomaceous powder;
By microfine diatomaceous powder in the ethanolic soln of 95%, then properties-correcting agent γ-aminopropyl triethoxysilane (KH-550) is added, ultrasonic disperse 40 minutes, then mechanic whirl-nett reaction 3h under 40 DEG C of conditions, centrifugation again, the solid product obtained, at 120 ~ 170 DEG C of vacuum-drying 1h, obtains modification infusorial earth; Wherein the blending ratio of microfine diatomaceous powder and ethanolic soln is 0.4g/mL ethanolic soln, and the add-on of properties-correcting agent is 3% of microfine diatomaceous powder weight;
Above-mentioned modification infusorial earth and the raw matter polyethylene of sugarcane are added in mixing roll, modification infusorial earth accounts for 30% of whole material gross weight, the raw matter polyethylene of sugarcane accounts for 70% of gross weight, setting mixing roll leading portion, interlude, back segment temperature is 125 DEG C, under 60rpm rotating speed after blended 35 minutes, under closed environment, screw extrusion press is sent to through forced feed system, and by water ring pelletizing-air-dry-auto-filling process, finally make diatomite/sugarcane raw matter polythene material particle, molecular weight 40000 ~ 300000Dalton, its elongation at break 315%, tensile strength: 22mPa.
Embodiment 3
By diatomite ore after auxiliary agent method, add 7% sodium carbonate, temperature controls at 1100 DEG C, time carried out roast at 15 ~ 20 minutes, after utilizing machinery mill and airflow milling processing, was machined to median size≤1 μm, be put in 95 ~ 155 DEG C of dryings 6 hours, be cooled to 22 DEG C and obtain microfine diatomaceous powder;
By microfine diatomaceous powder in the ethanolic soln of 95%, then properties-correcting agent n-propyl-triethoxysilicane ZQ-701 is added, ultrasonic disperse 70 minutes, then mechanic whirl-nett reaction 4h under 25 DEG C of conditions, centrifugation again, the solid product obtained, at 120 ~ 170 DEG C of vacuum-drying 10h, obtains modification infusorial earth; Wherein the blending ratio of microfine diatomaceous powder and ethanolic soln is 0.6g/mL ethanolic soln, and the add-on of properties-correcting agent is 8% of microfine diatomaceous powder weight;
Above-mentioned modification infusorial earth and the raw matter polyethylene of sugarcane are added in mixing roll, modification infusorial earth accounts for 50% of whole material gross weight, the raw matter polyethylene of sugarcane accounts for 50% of gross weight, setting mixing roll leading portion, interlude, back segment temperature is 145 DEG C, under 110rpm rotating speed after blended 10 minutes, under closed environment, screw extrusion press is sent to through forced feed system, and by water ring pelletizing-air-dry-auto-filling process, finally make diatomite/sugarcane raw matter polythene material particle, molecular weight 40000 ~ 300000Dalton, its elongation at break 260%, tensile strength: 31mPa.
Embodiment 4
By diatomite ore after auxiliary agent method, add 8% sodium carbonate, temperature controls at 1100 DEG C, time carried out roast at 20 ~ 25 minutes, after utilizing machinery mill and airflow milling processing, be machined to median size≤1 μm, be put in 95 ~ 155 DEG C of dryings 2 hours, be cooled to 20 ~ 25 DEG C and obtain microfine diatomaceous powder;
Properties-correcting agent ethyl polysilicate Si28-ZQ-342-Si32 is directly mixed with ethanol, hydrolysis 1h obtains mixed solution, then mixed solution is evenly sprayed at cooled microfine diatomaceous powder surface, then stir 30 minutes under 3500rpm condition, again in 110 DEG C of vacuum-drying 8h, obtain modification infusorial earth; Described properties-correcting agent mixes according to volume ratio 1:25 with ethanol, and the fountain height of mixed solution is 15% of microfine diatomaceous powder weight in properties-correcting agent in mixed solution;
Above-mentioned modification infusorial earth and the raw matter polyethylene of sugarcane are added in mixing roll, modification infusorial earth accounts for 10% of whole material gross weight, the raw matter polyethylene of sugarcane accounts for 90% of gross weight, setting mixing roll leading portion, interlude, back segment temperature is 145 DEG C, under 20rpm rotating speed after blended 55 minutes, under closed environment, screw extrusion press is sent to through forced feed system, and by water ring pelletizing-air-dry-auto-filling process, finally make diatomite/sugarcane raw matter polythene material particle, molecular weight 40000 ~ 300000Dalton, its elongation at break 292%, tensile strength: 30mPa.
Embodiment 5
By diatomite ore after auxiliary agent method, add 5% sodium carbonate, temperature controls at 1100 DEG C, time carried out roast at 10 ~ 15 minutes, after utilizing machinery mill and airflow milling processing, be machined to median size≤1 μm, be put in 95 ~ 155 DEG C of dryings 4 hours, be cooled to 20 ~ 25 DEG C and obtain microfine diatomaceous powder;
By properties-correcting agent γ-aminopropyl triethoxysilane (KH-550), hydrolysis 2h obtains mixed solution, then mixed solution is evenly sprayed at cooled microfine diatomaceous powder surface, then stirs 40 minutes under 2500rpm condition, again in 110 DEG C of vacuum-drying 9h, obtain modification infusorial earth; Described properties-correcting agent mixes according to volume ratio 1:20 with ethanol, and the fountain height of mixed solution is 10% of microfine diatomaceous powder weight in properties-correcting agent in mixed solution;
Above-mentioned modification infusorial earth and the raw matter polyethylene of sugarcane are added in mixing roll, modification infusorial earth accounts for 30% of whole material gross weight, the raw matter polyethylene of sugarcane accounts for 70% of gross weight, setting mixing roll leading portion, interlude, back segment temperature is 105 DEG C, under 80rpm rotating speed after blended 20 minutes, under closed environment, screw extrusion press is sent to through forced feed system, and by water ring pelletizing-air-dry-auto-filling process, finally make diatomite/sugarcane raw matter polythene material particle, molecular weight 40000 ~ 300000Dalton, its elongation at break 268%, tensile strength: 24mPa.
Embodiment 6
By diatomite ore after auxiliary agent method, add 4% sodium carbonate, temperature controls at 1100 DEG C, time carried out roast at 16 ~ 25 minutes, after utilizing machinery mill and airflow milling processing, be machined to median size≤1 μm, be put in 95 ~ 155 DEG C of dryings 6 hours, be cooled to 20 ~ 25 DEG C and obtain microfine diatomaceous powder;
Properties-correcting agent n-propyl-triethoxysilicane ZQ-701 is directly mixed with ethanol, hydrolysis 3h obtains mixed solution, then mixed solution is evenly sprayed at cooled microfine diatomaceous powder surface, then stir 50 minutes under 1500rpm condition, again in 110 DEG C of vacuum-drying 10h, obtain modification infusorial earth; Described properties-correcting agent mixes according to volume ratio 1:15 with ethanol, and the fountain height of mixed solution is 3% of microfine diatomaceous powder weight in properties-correcting agent in mixed solution;
Above-mentioned modification infusorial earth and the raw matter polyethylene of sugarcane are added in mixing roll, modification infusorial earth accounts for 50% of whole material gross weight, the raw matter polyethylene of sugarcane accounts for 50% of gross weight, setting mixing roll leading portion, interlude, back segment temperature is 125 DEG C, under 110rpm rotating speed after blended 10 minutes, under closed environment, screw extrusion press is sent to through forced feed system, and by water ring pelletizing-air-dry-auto-filling process, finally make diatomite/sugarcane raw matter polythene material particle, molecular weight 40000 ~ 300000Dalton, its elongation at break 245%, tensile strength: 31mPa.
Claims (3)
1. a preparation method for the PE modified macromolecular material of the raw matter of diatomite/sugarcane, is characterized in that comprising the steps:
(1) diatomite ore is selected, after auxiliary agent method, add 4% ~ 8% sodium carbonate, temperature controls at 1100 DEG C, time carried out roast at 10 ~ 25 minutes, utilized machinery mill and airflow milling to be machined to median size≤1 μm, then was put in 95 ~ 155 DEG C of dryings 2 ~ 6 hours, be cooled to 20-25 DEG C and obtain microfine diatomaceous powder, carry out modification according to the one in following two kinds of modes:
A () takes a certain amount of cooled microfine diatomaceous powder in the ethanolic soln of 95%, then properties-correcting agent is added, ultrasonic disperse 20 ~ 70 minutes, in 25 ~ 50 DEG C of mechanic whirl-nett reaction 2 ~ 4h, centrifugation again, the solid product obtained, at 120 ~ 170 DEG C of vacuum-drying 1 ~ 24h, obtains modification infusorial earth; Wherein the concentration of microfine diatomaceous powder in ethanolic soln is 0.2 ~ 0.6g/mL, and the add-on of properties-correcting agent is 3 ~ 15% of microfine diatomaceous powder weight;
B properties-correcting agent directly mixes with ethanol by (), be hydrolyzed at least 1h and make mixed solution, then mixed solution is evenly sprayed at microfine diatomaceous powder surface, then stir at least 30 minutes under 1500 ~ 3500rpm condition, last in 110 DEG C of vacuum-drying at least 8h, obtain modification infusorial earth; It is according to volume ratio 1:(15 ~ 25 that described properties-correcting agent mixes with ethanol) mix, the fountain height of mixed solution is 3 ~ 15% of microfine diatomaceous powder weight in properties-correcting agent in mixed solution;
(2) above-mentioned modification infusorial earth and the raw matter polyethylene of sugarcane are added in mixing roll, setting mixing roll leading portion, interlude, back segment temperature are identical, and be 105 ~ 145 DEG C, under 20 ~ 110rpm rotating speed after blended 10 ~ 55 minutes, under closed environment, screw extrusion press is sent to through forced feed system, and by water ring pelletizing-air-dry-auto-filling process, finally make diatomite/sugarcane raw matter polythene material particle.
2. the preparation method of the PE modified macromolecular material of the raw matter of diatomite according to claim 1/sugarcane, it is characterized in that in described step (2), modification infusorial earth add-on is gross weight 10 ~ 50wt.%, the poly add-on of the raw matter of sugarcane is gross weight 50 ~ 90wt.%.
3. the preparation method of the PE modified macromolecular material of the raw matter of diatomite according to claim 1/sugarcane, is characterized in that described properties-correcting agent adopts ethyl polysilicate Si28-ZQ-342-Si32, γ-aminopropyl triethoxysilane (KH-550) or n-propyl-triethoxysilicane ZQ-701.
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|---|---|---|---|---|
| CN102911421A (en) * | 2012-10-31 | 2013-02-06 | 营口东盛实业有限公司 | Preparation method of modified diatomite/polyethylene composite plastic |
| CN103059381A (en) * | 2013-01-14 | 2013-04-24 | 思伊纳化学科技（北京）有限公司 | Inorganic mineral filled wood-plastic composite material and preparation method thereof |
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| JP2002363325A (en) * | 2001-06-06 | 2002-12-18 | Tadashi Hasegawa | Method for manufacturing foamed plastic |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102911421A (en) * | 2012-10-31 | 2013-02-06 | 营口东盛实业有限公司 | Preparation method of modified diatomite/polyethylene composite plastic |
| CN103059381A (en) * | 2013-01-14 | 2013-04-24 | 思伊纳化学科技（北京）有限公司 | Inorganic mineral filled wood-plastic composite material and preparation method thereof |
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Effective date of registration: 20220216 Address after: 115000 no.61-3 Binhai Road South, Xishi District, Yingkou City, Liaoning Province Patentee after: LIAONING TUNGSHENG PLASTIC INDUSTRY CO.,LTD. Address before: 115000 No. 88, West Qinghua street, Xishi District, Yingkou City, Liaoning Province Patentee before: LIAONING TUNGSHENG PLASTIC INDUSTRY CO.,LTD. Patentee before: Yingkou Dongsheng Industrial Co., Ltd |