CN102604210B - Degradable polypropylene foam composite material and preparation method thereof - Google Patents
Degradable polypropylene foam composite material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a degradable polypropylene foam composite material, which comprises the following components in parts by weight: 20-50 parts of polypropylene, 5-20 parts of low density polyethylene, 10-25 parts of linear low density polyethylene, 1-10 parts of ethylene-vinyl acetate copolymer, 0.1-5 parts of RA foaming agent, 0.3-2 parts of zinc oxide, 1-10 parts of a coupling agent, and 20-60 parts of calcium carbonate. A preparation method of the degradable polypropylene foam composite material comprises the following steps: (a) weighing according to the above components and weight parts; (b) dissolving the coupling agent in solvent oil, adding calcium carbonate, blending uniformly, heating up, and holding the temperature to obtain a mixed solution; and (c) adding polypropylene, low density polyethylene, linear low density polyethylene, ethylene-vinyl acetate copolymer, the RA foaming agent, zinc oxide into the mixed solution, mechanically stirring, and adding into a double screw extrusion machine for granulation. The composite material provided by the invention has good tensile strength, low liability of breakage and good degradation property, and can be used in articles for daily use, packaging industry, communications and transportation and other fields.
Description
Technical field
The present invention relates to a kind of polypropene composition and preparation method, specifically a kind of degradable polypropylene foam composite material and preparation method thereof.
Background technology
The degradable polypropylene foam composite material is to be that raw material is made the plastics that inside has countless spileholes with resins such as polypropylene.It has light weight, insulation, heat insulation, damping, anticorrosion, save advantages such as cost and price is cheap, be widely used in daily necessities, packaging industry, transportation, agricultural, space industry and war industry.Yet, polypropylene is compared with amorphous polystyrene, polyacrylic blowing temperature narrow range, and the foaming difficulty is big, below fusing point, the system viscosity is big, and bubble is difficult to generate, and more than fusing point, the system viscosity descends rapidly, melt strength is low, causes gas to be escaped in system, is difficult to form lockedin air space.Simultaneously, at cooling stages, because the crystalling propylene thermal discharge is big, system viscosity step-down makes that the bubble that forms may be further destroyed, causes the expanded polypropylene of final preparation problems such as intensity is low, easy fracture to occur drawing high.In addition, when expanded polypropylene material is used for food product pack, because composition of raw materials is unreasonable at present, also there are problems such as the easy contaminated food products of material, degradation property difference.These problems make the use range of foam material be greatly limited.
Summary of the invention
Purpose of the present invention just provides a kind of polypropylene composite material, and existing foam composite material tensile strength is low to solve, the problem of easy fracture and degradation property difference.
The objective of the invention is to be achieved through the following technical solutions:
Degradable polypropylene foam composite material provided by the present invention is to be made by the component of following weight part ratio:
20～50 parts of polypropylene, 5～20 parts of Low Density Polyethylenes, 10～25 parts of linear low density polyethylenes, 1～10 part of ethylene-vinyl acetate copolymer, 0.1～5 part of RA whipping agent, 0.3～2 part in zinc oxide, 1～10 part of coupling agent, 20～60 parts in calcium carbonate.
Degradable polypropylene foam composite material provided by the present invention, preferred weight part ratio of described component is:
Polipropene 25～35 part, 5～15 parts of Low Density Polyethylenes, 15～20 parts of linear low density polyethylenes, 2～5 parts of ethylene-vinyl acetate copolymers, 0.3～1 part of RA whipping agent, 0.3～1 part in zinc oxide, 2～5 parts of coupling agents, 30～50 parts in calcium carbonate.
The preparation method of degradable polypropylene foam composite material provided by the invention may further comprise the steps:
(a) take by weighing each component according to the described component of claim 1 and weight part ratio;
(b) with coupling agent with after the solvent oil dissolving, add calcium carbonate after, high-speed stirring 30～50 min, be warming up to 80～90 ℃ after, insulation 40～60 min get mixed solution;
(c) add polypropylene, Low Density Polyethylene, linear low density polyethylene, ethylene-vinyl acetate copolymer, RA whipping agent and zinc oxide in mixed solution, mechanical stirring is even, joins twin screw extruder granulation material.
Coupling agent of the present invention is the mixture of titanic acid ester and aluminic acid ester, and the mass ratio of titanic acid ester and aluminic acid ester is 2.5～3.5:2.
The melt flow rate (MFR) of Low Density Polyethylene of the present invention is 6～7 g/10 min.
The melt flow rate (MFR) of linear low density polyethylene of the present invention is 1.7～2.3 g/10 min.
Calcium carbonate described in the present invention is 1200～1350 purpose water-ground limestones.
The interval temperature of twin screw extruder from the major ingredient mouth to the head mouth is 160～185 ℃ in the step described in the present invention (c), and die head temperature is 195 ℃, and engine speed is 300 r/ min.
Add Low Density Polyethylene, linear low density polyethylene in the prescription provided by the present invention, can reduce polyacrylic degree of crystallinity, the temperature of the suitable foaming of mixed system is broadened, adopted ethylene-vinyl acetate copolymer to increase melt strength, stop overflowing of the interior gas of melt; And the RA whipping agent feature of environmental protection is good, can not produce content as wrapping material and pollute and toxic side effect, has improved the environmental-protecting performance of this material; Adopt calcium carbonate can make material be easy to comparatively fast degraded in the environment of illumination and humidity as weighting material, this both can reduce the salvage material expense, can avoid environmental pollution again.
Embodiment
Following embodiment is used for further describing the present invention, but does not limit the present invention in any form.
Embodiment 1
The aluminic acid ester of 0.6 g titanic acid ester and 0.4 g is mixed, after the dissolving evenly of 120# solvent oil, add 1250 purpose water-ground limestones, 20 g after, high speed machine stirs 30min, is warming up to 80 ℃, is incubated 40 min, gets mixed solution; Adding 20 g polypropylene, melt flow rate (MFR) are Low Density Polyethylene 5 g of 5 g/10 min, linear low density polyethylene 10 g, 1 g ethylene-vinyl acetate copolymer, RA whipping agent 0.1 g, zinc oxide 0.3 g that melt flow rate (MFR) is 2.1 g/10 min in mixed solution, mechanical stirring is even, join twin screw extruder granulation material, pellet is placed on 80 ℃ of following dry 2 h in the baking oven, pull out sheet material with single screw extrusion machine again, measure performance.Wherein the interval temperature of the twin screw extruder of Low Density Polyethylene from the major ingredient mouth to the head mouth is 160～185 ℃, and die head temperature is 195 ℃, and engine speed is 300 r/ min.Recording its density is 0.953 g/m
3, tensile strength is 8.8 MPa, elongation at break is 22.1%.
Embodiment 2
The aluminic acid ester of 6 g titanic acid ester and 4 g is mixed, after the dissolving evenly of 120# solvent oil, add 1250 purpose water-ground limestone 60g after, high speed machine stirs 50min, is warming up to 90 ℃, is incubated 60 min, gets mixed solution; Adding 35 g polypropylene, melt flow rate (MFR) are Low Density Polyethylene 20 g of 5 g/10 min, linear low density polyethylene 35 g, 10 g ethylene-vinyl acetate copolymers, RA whipping agent 5 g, zinc oxide 2 g that melt flow rate (MFR) is 2 g/10 min in mixed solution, mechanical stirring is even, join twin screw extruder granulation material, pellet is placed on 80 ℃ of following dry 3 h in the baking oven, pull out sheet material with single screw extrusion machine again, measure performance.Wherein the interval temperature of twin screw extruder from the major ingredient mouth to the head mouth is 160～185 ℃, and die head temperature is 195 ℃, and engine speed is 300 r/ min, and recording its density is 0.908 g/m
3, tensile strength is 9.0 MPa, elongation at break is 20.1%.
Embodiment 3
The aluminic acid ester of 1.2 g titanic acid ester and 0.8 g is mixed, after the dissolving evenly of 120# solvent oil, add 1250 purpose water-ground limestones, 30 g after, high speed machine stirs 40min, is warming up to 85 ℃, is incubated 50 min, gets mixed solution; Adding 25 g polypropylene, melt flow rate (MFR) are Low Density Polyethylene 8 g of 6 g/10 min, linear low density polyethylene 15 g, 2 g ethylene-vinyl acetate copolymers, RA whipping agent 0.3 g, zinc oxide 0.3 g that melt flow rate (MFR) is 5 g/10 min in mixed solution, mechanical stirring is even, join twin screw extruder granulation material, pellet is placed on 80 ℃ of following dry 2 h in the baking oven, pull out sheet material with single screw extrusion machine again, measure performance.Wherein the interval temperature of twin screw extruder from the major ingredient mouth to the head mouth is 160～185 ℃, and die head temperature is 195 ℃, and engine speed is 300 r/ min, and recording its density is 0.933 g/m
3, tensile strength is 8.76 MPa, elongation at break is 22.6%.
Embodiment 4
The aluminic acid ester of 3 g titanic acid ester and 2 g is mixed, after the dissolving evenly of 120# solvent oil, add 1250 purpose water-ground limestones, 50 g after, high speed machine stirs 40min, is warming up to 85 ℃, is incubated 50 min, gets mixed solution; Adding 35 g polypropylene, melt flow rate (MFR) are Low Density Polyethylene 15 g of 5 g/10 min, linear low density polyethylene 20 g, 5 g ethylene-vinyl acetate copolymers, RA whipping agent 1 g, zinc oxide 1 g that melt flow rate (MFR) is 2.2 g/10 min in mixed solution, mechanical stirring is even, join twin screw extruder granulation material, pellet is placed on 80 ℃ of following dry 2 h in the baking oven, pull out sheet material with single screw extrusion machine again, measure performance.Wherein the interval temperature of twin screw extruder from the major ingredient mouth to the head mouth is 160～185 ℃, and die head temperature is 195 ℃, and engine speed is 300 r/ min, and recording its density is 0.910 g/m
3, tensile strength is 8.74 MPa, elongation at break is 21.8%.
Embodiment 5
The aluminic acid ester of 2.4 g titanic acid ester and 1.6 g is mixed, after the dissolving evenly of 120# solvent oil, add 1250 purpose water-ground limestones, 40 g after, high speed machine stirs 50min, is warming up to 90 ℃, is incubated 60 min, gets mixed solution; Adding 30 g polypropylene, melt flow rate (MFR) are Low Density Polyethylene 10 g of 5 g/10 min, linear low density polyethylene 15 g, 3 g ethylene-vinyl acetate copolymers, RA whipping agent 0.5 g, zinc oxide 0.5 g that melt flow rate (MFR) is 1.8 g/10 min in mixed solution, mechanical stirring is even, join twin screw extruder granulation material, pellet is placed on 85 ℃ of following dry 2 h in the baking oven, pull out sheet material with single screw extrusion machine again, measure performance.Wherein the interval temperature of twin screw extruder from the major ingredient mouth to the head mouth is 160～185 ℃, and die head temperature is 195 ℃, and engine speed is 300 r/ min, and recording its density is 0.923 g/m
3, tensile strength is 9.1MPa, elongation at break is 21.9%.
Embodiment 6
The aluminic acid ester of 1.8 g titanic acid ester and 1.2 g is mixed, after the dissolving evenly of 120# solvent oil, add 1250 purpose water-ground limestones, 35 g after, high speed machine stirs 40min, is warming up to 85 ℃, is incubated 50 min, gets mixed solution; Adding 30 g polypropylene, melt flow rate (MFR) are Low Density Polyethylene 12 g of 7 g/10 min, linear low density polyethylene 18 g, 4 g ethylene-vinyl acetate copolymers, RA whipping agent 0.8 g, zinc oxide 0.8 g that melt flow rate (MFR) is 1.9 g/10 min in mixed solution, mechanical stirring is even, join twin screw extruder granulation material, pellet is placed on 80 ℃ of following dry 2 h in the baking oven, pull out sheet material with single screw extrusion machine again, measure performance.Wherein the interval temperature of twin screw extruder from the major ingredient mouth to the head mouth is 160～185 ℃, and die head temperature is 195 ℃, and engine speed is 300 r/ min, and recording its density is 0.911 g/m
3, tensile strength is 8.94 MPa, elongation at break is 22.5%.
The performance test of the degradable polypropylene foam composite material that embodiment 7 the present invention are made
The method of inspection: press GB1040-79 and measure plastic tensile intensity and elongation at break, measure the density of this material by GB1033-70.
Claims (8)
1. the preparation method of a degradable polypropylene foam composite material is characterized in that may further comprise the steps:
(a) component and the weight part ratio according to the following stated takes by weighing each component;
20～50 parts of polypropylene, 5～20 parts of Low Density Polyethylenes, 10～25 parts of linear low density polyethylenes, 1～10 part of ethylene-vinyl acetate copolymer, 0.1～5 part of RA whipping agent, 0.3～2 part in zinc oxide, 1～10 part of coupling agent, 20～60 parts in calcium carbonate;
(b) with coupling agent with after the solvent oil dissolving, add calcium carbonate after, high-speed stirring 30～50 min, be warming up to 80～90 ℃ after, insulation 40～60 min get mixed solution;
(c) add polypropylene, Low Density Polyethylene, linear low density polyethylene, ethylene-vinyl acetate copolymer, RA whipping agent, zinc oxide in mixed solution, mechanical stirring is even, joins twin screw extruder granulation material.
2. the preparation method of degradable polypropylene foam composite material according to claim 1, it is characterized in that the interval temperature of twin screw extruder from the major ingredient mouth to the head mouth is 160～185 ℃ in the described step (c), die head temperature is 195 ℃, and engine speed is 300 r/ min.
3. the preparation method of degradable polypropylene foam composite material according to claim 1 is characterized in that the weight part ratio of described component is:
Polipropene 25～35 part, 5～15 parts of Low Density Polyethylenes, 15～20 parts of linear low density polyethylenes, 2～5 parts of ethylene-vinyl acetate copolymers, 0.3～1 part of RA whipping agent, 0.3～1 part in zinc oxide, 2～5 parts of coupling agents, 30～50 parts in calcium carbonate.
4. the preparation method of degradable polypropylene foam composite material according to claim 1 is characterized in that described coupling agent is the mixture of titanic acid ester and aluminic acid ester, and the mass ratio of titanic acid ester and aluminic acid ester is 2.5～3.5:2.
5. the preparation method of degradable polypropylene foam composite material according to claim 1 and 2, the melt flow rate (MFR) that it is characterized in that described Low Density Polyethylene is 6～7 g/10 min.
6. the preparation method of degradable polypropylene foam composite material according to claim 1 and 2, the melt flow rate (MFR) that it is characterized in that described linear low density polyethylene is 1.7～2.3 g/10 min.
7. the preparation method of degradable polypropylene foam composite material according to claim 1 and 2 is characterized in that described calcium carbonate is 1200～1350 purpose water-ground limestones.
8. the preparation method of a degradable polypropylene foam composite material, it is characterized in that the aluminic acid ester of 0.6 g titanic acid ester and 0.4 g is mixed, after the dissolving evenly of 120# solvent oil, after adding 1250 purpose water-ground limestones, 20 g, high speed machine stirs 30min, be warming up to 80 ℃, be incubated 40 min, get mixed solution; Adding 20 g polypropylene, melt flow rate (MFR) are Low Density Polyethylene 5 g of 5 g/10 min, linear low density polyethylene 10 g, 1 g ethylene-vinyl acetate copolymer, RA whipping agent 0.1 g, zinc oxide 0.3 g that melt flow rate (MFR) is 2.1 g/10 min in mixed solution, mechanical stirring is even, join twin screw extruder granulation material, pellet is placed on 80 ℃ of following dry 2 h in the baking oven, pull out sheet material with single screw extrusion machine again, measure performance; Wherein the interval temperature of the twin screw extruder of Low Density Polyethylene from the major ingredient mouth to the head mouth is 160～185 ℃, and die head temperature is 195 ℃, and engine speed is 300 r/ min; Recording its density is 0.953 g/m
3, tensile strength is 8.8 MPa, elongation at break is 22.1%.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103030875B (en) * | 2012-12-24 | 2014-10-29 | 常州大学 | Modified PP (polypropylene) foaming material and forming method thereof |
| CN103450559B (en) * | 2013-07-25 | 2014-10-29 | 湖北南泽汽车复合材料有限公司 | High-rate polypropylene foaming material |
| CN104558817A (en) * | 2013-10-15 | 2015-04-29 | 中国石油化工股份有限公司 | Foamed composite material and preparation method thereof |
| CN103756084A (en) * | 2013-12-10 | 2014-04-30 | 芜湖佳诚电子科技有限公司 | Polyethylene communication cable insulating material and preparation method thereof |
| CN106317842A (en) * | 2016-08-29 | 2017-01-11 | 芜湖市天雄新材料科技有限公司 | Biodegradable material for agriculture and preparation method thereof |
| CN106336575A (en) * | 2016-09-22 | 2017-01-18 | 苏州佰思科节能环保科技有限公司 | Easily degradable polypropylene environment-friendly material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101081914A (en) * | 2007-07-06 | 2007-12-05 | 天津市润生塑胶制品有限公司 | Polypropylene expanded material and method for manufacturing same |
| CN102250399A (en) * | 2011-06-01 | 2011-11-23 | 广州市波斯塑胶颜料有限公司 | Polyolefin masterbatch and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101081914A (en) * | 2007-07-06 | 2007-12-05 | 天津市润生塑胶制品有限公司 | Polypropylene expanded material and method for manufacturing same |
| CN102250399A (en) * | 2011-06-01 | 2011-11-23 | 广州市波斯塑胶颜料有限公司 | Polyolefin masterbatch and preparation method thereof |
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