CN101792551A - Novel antistatic bending-resisting polypropylene dustproof fan blade and preparation method thereof - Google Patents
Novel antistatic bending-resisting polypropylene dustproof fan blade and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a novel antistatic bending-resisting polypropylene dustproof fan blade, which is prepared from the following components in percentage by weight through reaction: 56.5 to 60.5 percent of polypropylene resin, 0.5 to 4 percent of antistatic agent, 28 to 32 percent of glass fiber, 8 to 10 percent of gypsum powder and 0 to 1 percent of additive. A preparation method for the dustproof fan blade of the invention comprises the following steps: putting a certain proportion of the polypropylene resin, the antistatic agent, the glass fiber, the gypsum powder and the additive into a high mixing device, uniformly mixing the raw materials and stirring the mixture; putting the mixed raw materials into a charging barrel of a double-screw extruder to carry out extrusion and traction at a temperature of between 160 and 220 DEG C, carrying out standing-wave cooling on the obtained product and carrying out granulating; and utilizing the granules to prepare the dustproof fan blade by a common process. The novel antistatic bending-resisting polypropylene dustproof fan blade mixes small added quantity of the antistatic agent with the glass fiber and the gypsum powder into the polypropylene, has more excellent antistatic property and more excellent impact resistance and bending resistance and can provide decrease of the surface resistivity 10 to 100 times on average.
Description
Technical field
The present invention relates to a kind of antistatic bending-resisting polypropylene dustproof fan blade, the invention still further relates to a kind of preparation method who prepares this antistatic bending-resisting polypropylene dustproof fan blade.
Background technology
Polypropylene is a kind of important general-purpose plastics, has over-all propertieies such as excellent shock resistance, optics resistance to bending, electric insulating quality, dimensional stability.Therefore polypropylene is widely used in during numerous optical articles such as auto parts, fan blade, packing box, sheet material etc. use.Although polypropylene has plurality of advantages, but because its chemical structure decision, in production of articles, material and metal die are easy to produce electric charge when breaking away from and are enriched in the surface, cause that the goods yield descends thereby cause in the air dust to be adsorbed onto product surface, even the electronic product malfunction.
Produce in order to reduce surface charge, a large amount of static neutralising arrangements such as static fan etc. are installed in the production of articles link.Though its performance improves in a short time, it can not eliminate static fully.And the static that is produced in the goods secondary processing also can't be eliminated.
Also there are some antistatic coating products such as ITO coating and antistatic polyurethane coating to be developed to be coated with and install to the polypropylene articles surface, play the elimination electrostatic interaction.But bring coating and polypropylene articles bounding force deterioration again simultaneously, the anti-scratch performance of coating is not good, and the secondary processing flow process causes producing degradation misgivings under the yield.The raising greatly that the while coating technology can be brought tooling cost.
Therefore there is multiple polypropylene material modification technology to be developed, thereby eliminates generation of static electricity from the raw material level.Thereby a kind of method is the graphite, the metallic particles that add conduction in polypropylene material reduces product surface resistance, reduces the electric charge enrichment.But generally need big conductive additive and polypropylene thorough mixing can effectively play antistatic effect.This has brought goods not counter-bending again simultaneously, and it is big that difficulty of processing becomes, the contradiction that the conductive additive cost is higher.
Another kind method is used as static inhibitor for adding multiple aniorfic surfactant in polyethylene, polypropylene articles.But because itself and the relatively poor and very difficult quilt of polypropylene material consistency effectively disperse, and it moves to the polypropylene articles surface easily at short notice, in addition after the goods water cleans, thereby static inhibitor is easy to be washed off and causes the antistatic life-span of goods not long.
Also have a kind of method promptly to add nonionic surfactant such as Vinlub, this tensio-active agent and polypropylene have consistency preferably comparatively speaking, but need bigger addition just can play good antistatic property, simultaneously, Vinlub cause in the production of articles coal mine gas to discharge fully owing to being enriched in product surface in a large number, product surface produces oil drop, and yield descends.
Existing employing polypropylene be the flabellum made of main raw material its generally do not have dustproof effect or dustproof effect is undesirable, therefore, to make flabellum be this area scientific research personnel one of key technical problem of studying of always doing one's utmost for a kind of shock resistance that can keep the polypropylene excellence of exploitation and optics resistance to bending and antistatic polypropylene material with good dust-proof effect.
Summary of the invention
The objective of the invention is provides a kind of surface resistivity relatively low novel antistatic bending-resisting polypropylene dustproof fan blade in order to overcome weak point of the prior art;
Another object of the present invention also is to provide a kind of preparation method of above-mentioned novel antistatic bending-resisting polypropylene dustproof fan blade.
The object of the present invention is achieved like this:
The invention provides a kind of novel antistatic bending-resisting polypropylene dustproof fan blade, make by reaction by following components in weight percentage:
Acrylic resin 56.5%～60.5%
Static inhibitor 0.5%～4%
Glass fibre 28%～32%
Terra alba 8%-10%
Additive 0%～1%;
Described acrylic resin is a Co-polypropylene; Its flowability is 10g/10min.
Described static inhibitor is selected from least two kinds in alkyl stearate, oxyethyl group alkyl amine, alkylbenzene semi-annular jade pendant acid phosphonium salt and the alkyl perfluor semi-annular jade pendant imidazole acid salt, wherein, described alkyl stearate is preferably Vinlub or Sorbitol Powder hard acid ester, described Vinlub can be Zerol (Glyceryl monostearate), and described Sorbitol Powder hard acid ester can be polyethylene oxide anhydro sorbitol Monostearate (Polyoxyethyene SorbitanMonolaurate); Described oxyethyl group alkyl amine is preferably dodecyl-2 (hydroxyethyl) amine (N, N-Bis (2-hydroxyethyl) dodecanamide), described alkane base benzene sulfonic acid phosphonium salt is preferably Witco 1298 Soft Acid-tetraalkyl (3 butyl) phosphonium salt (tetraalkyl phosphoniumalkylbenzene sulfonate), described alkyl perfluorinated sulfonic acid imidazole salts is preferably 1-butyl-3-Methylimidazole-1,1,2,2-tetrafluoro ethyl sulfonate (1-butyl-3-methylimidazolium1,1,2,2-tetrafluoroethanesulfonate);
Described glass fibre is the 300-500 millimeters long, and filament diameter is the glass fiber of 10-20 micron; Grindings such as the described terra alba plaster of paris form fineness 5-40 micron.
Described additive is selected from least a in oxidation inhibitor, UV light stabilizing agent and the releasing agent.
The starting material that adopted among the present invention all can be purchased from market and obtain.
The present invention also provides a kind of preparation method of novel antistatic bending-resisting polypropylene dustproof fan blade, realizes by following steps:
A certain proportion of acrylic resin, static inhibitor and glass fibre, terra alba and additive are put into high mixer, mixing and stirring;
Mixed raw materials is put into the barrel of twin screw extruder, under 160-220 ℃, extrude traction, cross tank cooling back granulation.
C, utilize above-mentioned particle to produce dustproof fan blade by technology commonly used.
Material of the present invention can be used for making to the counter-bending parts of the polypropylene of electrostatic sensitive, as fan blade, auto parts etc.
Usually, the mechanical property of polypropylene material itself requires difference very big apart from the engineering structure part, and general tensile strength is between 20～30MPa, and flexural strength is between 25～50MPa, and modulus in flexure is between 800～1500MPa.Can access at double by glass fibre enhanced polypropylene mechanical performance of products among the present invention even the raising of several times.Be used on the engineering structure part, specifically, the tensile strength by glass fibre enhanced polypropylene product has reached 65～85MPa, and flexural strength has reached 70～95MPa, and modulus in flexure has reached 3000～4500MPa.Such physical strength can compare favourably with ABS and reinforced ABS product fully, and more heat-resisting.Generally, the heat resisting temperature of ABS and reinforced ABS is between 80 ℃～98 ℃, and the heat resisting temperature of glass fibre enhanced polypropylene material of the present invention can reach 135 ℃～145 ℃.It can be used to make axial fan and axial-flow fan in the refrigerating machines such as refrigerator, air-conditioning, and its cost strengthens product than ABS or AS enhancing product is much lower.
In pp material, add terra alba among the present invention.This mineral substance not only can improve the mechanical property and the impelling strength of polypropylene material to a certain extent, the molding shrinkage that reduces polypropylene material is to strengthen its dimensional stability, and, can reduce the cost of polypropylene material significantly owing to terra alba and the huge difference of polypropylene matrix on cost.Mineral substance can strengthen tenacity-increased profax.Polypropylene material can overcome problems such as its original undercapacity, glossiness is bad, contraction is too big after the enhancing of terra alba mineral substance is toughness reinforcing.
By inventing with the contrast and experiment of the polypropylene material of not dosing static inhibitor on shock resistance energy and optics resistance to bending, the present invention is blended in the polypropylene with less static inhibitor addition and glass fibre and terra alba, still can keep the shock resistance and the optics resistance to bending of polypropylene excellence.With the contrast of interpolation one-component static inhibitor polypropylene material, multiple antistatic ingredient compound system can provide more excellent antistatic energy, and provide excellent better shock resistance and resistance to bending, and can provide average 10-100 the decline of times surface resistivity.
Embodiment
Below in conjunction with embodiment the present invention is described further:
Embodiment 1
Dustproof fan blade of the present invention is made by the novel antistatic bending-resisting polypropylene material, wherein said novel antistatic bending-resisting polypropylene material is made by the component of hundred parts of proportionings of following weight: 56.5% homopolymer polypropylene, 0.5% Zerol (Glycerylmonostearate), 1% dodecyl-2 (2-hydroxyethyl) amine (N, N-Bis (2-hydroxyethyl) dodecanamide), 32% 300-500 millimeters long, filament diameter is the glass fiber of 10-20 micron, the terra alba of 10% fineness 5-40 micron.
In proportion above-mentioned each component is put into high mixer, mixing and stirring, and by twin screw extruder mixing (employed twin screw extruder screw diameter is 39mm, length-to-diameter ratio is 35. to wear the weightless feeder of 2kg range), under 180-285-185-190 degree centigrade, extrude, tank cooling back granulation is crossed in traction then, and particle length is 2-3mm.Utilize above-mentioned particle to produce dustproof fan blade by technology commonly used.
Embodiment 2
Dustproof fan blade of the present invention is made by the novel antistatic bending-resisting polypropylene material, wherein said novel antistatic bending-resisting polypropylene material is made by the component of hundred parts of proportionings of following weight: 60.5% homopolymer polypropylene, 1.5% Sorbitol Powder hard acid ester, 1% dodecyl-2 (2-hydroxyethyl) amine (N, N-Bis (2-hydroxyethyl) dodecanamide), 28% 300-500 millimeters long, filament diameter is the glass fiber of 10-20 micron, the terra alba of 8% fineness 5-40 micron, 1% oxidation inhibitor.
In proportion above-mentioned each component is put into high mixer, mixing and stirring, and by twin screw extruder mixing (employed twin screw extruder screw diameter is 39mm, length-to-diameter ratio is 35. to wear the weightless feeder of 2kg range), under 180-285-185-190 degree centigrade, extrude, tank cooling back granulation is crossed in traction then, and particle length is 2-3mm.Utilize above-mentioned particle to produce dustproof fan blade by technology commonly used.
Embodiment 3
Dustproof fan blade of the present invention is made by the novel antistatic bending-resisting polypropylene material, wherein said novel antistatic bending-resisting polypropylene material is made by the component of hundred parts of proportionings of following weight: 57% homopolymer polypropylene, 1% Sorbitol Powder hard acid ester, 1.7% alkyl benzene sulphonate (ABS)-Si Wan Ji phosphonium salt (tetraalkyl phosphonium alkylbenzene sulfonate), 31% 300-500 millimeters long, filament diameter is the glass fiber of 10-20 micron, the terra alba of 9% fineness 5-40 micron, 0.3% UV light stabilizing agent.
In proportion above-mentioned each component is put into high mixer, mixing and stirring, and by twin screw extruder mixing (employed twin screw extruder screw diameter is 39mm, length-to-diameter ratio is 35. to wear the weightless feeder of 2kg range), under 180-285-185-190 degree centigrade, extrude, tank cooling back granulation is crossed in traction then, and particle length is 2-3mm.Utilize above-mentioned particle to produce dustproof fan blade by technology commonly used.
Embodiment 4
Dustproof fan blade of the present invention is made by the novel antistatic bending-resisting polypropylene material, wherein said novel antistatic bending-resisting polypropylene material is made by the component of hundred parts of proportionings of following weight: 57.5% homopolymer polypropylene, 1% Sorbitol Powder hard acid ester, 1% 1-butyl-3 Methylimidazole-1,1,2,2 tetrafluoro ethyl sulfonate (1-butyl-3-methylimidazolium1,1,2,2-tetrafluoroethanesulfonate), 30% 300-500 millimeters long, filament diameter is the glass fiber of 10-20 micron, the terra alba of 10% fineness 5-40 micron, 0.3% releasing agent.
In proportion above-mentioned each component is put into high mixer, mixing and stirring, and by twin screw extruder mixing (employed twin screw extruder screw diameter is 39mm, length-to-diameter ratio is 35. to wear the weightless feeder of 2kg range), under 180-285-185-190 degree centigrade, extrude, tank cooling back granulation is crossed in traction then, and particle length is 2-3mm.Utilize above-mentioned particle to produce dustproof fan blade by technology commonly used.
Embodiment 5
Dustproof fan blade of the present invention is made by the novel antistatic bending-resisting polypropylene material, wherein said novel antistatic bending-resisting polypropylene material is made by the component of hundred parts of proportionings of following weight: 58% homopolymer polypropylene, 1% Zerol (Glycerylmonostearate), 1% alkyl benzene sulphonate (ABS)-Si Wan Ji phosphonium salt (tetraalkyl phosphoniumalkylbenzene sulfonate), 2% 1-butyl-3 Methylimidazole-1,1,2,2 tetrafluoro ethyl sulfonate (1-butyl-3-methylimidazolium1,1,2,2-tetrafluoroethanesulfonate), 29% 300-500 millimeters long, filament diameter is the glass fiber of 10-20 micron, the terra alba of 8.5% fineness 5-40 micron, 0.5% releasing agent and oxidation inhibitor.
In proportion above-mentioned each component is put into high mixer, mixing and stirring, and by twin screw extruder mixing (employed twin screw extruder screw diameter is 39mm, length-to-diameter ratio is 35. to wear the weightless feeder of 2kg range), under 180-285-185-190 degree centigrade, extrude, tank cooling back granulation is crossed in traction then, and particle length is 2-3mm.Utilize above-mentioned particle to produce dustproof fan blade by technology commonly used.
Embodiment 6
Dustproof fan blade of the present invention is made by the novel antistatic bending-resisting polypropylene material, wherein said novel antistatic bending-resisting polypropylene material is made by the component of hundred parts of proportionings of following weight: 58.5% homopolymer polypropylene, 2.5% alkyl benzene sulphonate (ABS)-Si Wan Ji phosphonium salt (tetraalkylphosphonium alkylbenzene sulfonate), 0.2% 1-butyl-3 Methylimidazole-1,1,2,2 tetrafluoro ethyl sulfonate (1-butyl-3-methylimidazolium-1,1,2,2-tetrafluoroethanesulfonate), 28.5% 300-500 millimeters long, filament diameter is the glass fiber of 10-20 micron, the terra alba of 9.5% fineness 5-40 micron, 0.8% releasing agent, UV light stabilizing agent and oxidation inhibitor.
In proportion above-mentioned each component is put into high mixer, mixing and stirring, and by twin screw extruder mixing (employed twin screw extruder screw diameter is 39mm, length-to-diameter ratio is 35. to wear the weightless feeder of 2kg range), under 180-285-185-190 degree centigrade, extrude, tank cooling back granulation is crossed in traction then, and particle length is 2-3mm.Utilize above-mentioned particle to produce dustproof fan blade by technology commonly used.
Comparative Examples 7
Dustproof fan blade of the present invention is made by the novel antistatic bending-resisting polypropylene material, wherein said novel antistatic bending-resisting polypropylene material is made by the component of hundred parts of proportionings of following weight: 59% homopolymer polypropylene, 1% Zerol (Glycerylmonostearate), 29.5% 300-500 millimeters long, filament diameter is the glass fiber of 10-20 micron, the terra alba of 10% fineness 5-40 micron, 0.5% oxidation inhibitor.
In proportion above-mentioned each component is put into high mixer, mixing and stirring, and by twin screw extruder mixing (employed twin screw extruder screw diameter is 39mm, length-to-diameter ratio is 35. to wear the weightless feeder of 2kg range), under 180-285-185-190 degree centigrade, extrude, tank cooling back granulation is crossed in traction then, and particle length is 2-3mm.Utilize above-mentioned particle to produce dustproof fan blade by technology commonly used.
Comparative Examples 8
Dustproof fan blade of the present invention is made by the novel antistatic bending-resisting polypropylene material, wherein said novel antistatic bending-resisting polypropylene material is made by the component of hundred parts of proportionings of following weight: 59.5% homopolymer polypropylene, 0.5% Sorbitol Powder hard acid ester, 32% 300-500 millimeters long, filament diameter is the glass fiber of 10-20 micron, the terra alba of 8% fineness 5-40 micron.
In proportion above-mentioned each component is put into high mixer, mixing and stirring, and by twin screw extruder mixing (employed twin screw extruder screw diameter is 39mm, length-to-diameter ratio is 35. to wear the weightless feeder of 2kg range), under 180-285-185-190 degree centigrade, extrude, tank cooling back granulation is crossed in traction then, and particle length is 2-3mm.Utilize above-mentioned particle to produce dustproof fan blade by technology commonly used.
Comparative Examples 9
Dustproof fan blade of the present invention is made by the novel antistatic bending-resisting polypropylene material, wherein said novel antistatic bending-resisting polypropylene material is made by the component of hundred parts of proportionings of following weight: 60% homopolymer polypropylene, 3.5% dodecyl-2 (2-hydroxyethyl) amine (N, N-Bis (2-hydroxyethyl) dodecanamide), 28% 300-500 millimeters long, filament diameter is the glass fiber of 10-20 micron, the terra alba of 8% fineness 5-40 micron, 0.5% oxidation inhibitor.
In proportion above-mentioned each component is put into high mixer, mixing and stirring, and by twin screw extruder mixing (employed twin screw extruder screw diameter is 39mm, length-to-diameter ratio is 35. to wear the weightless feeder of 2kg range), under 180-285-185-190 degree centigrade, extrude, tank cooling back granulation is crossed in traction then, and particle length is 2-3mm.Utilize above-mentioned particle to produce dustproof fan blade by technology commonly used.
Comparative Examples 10
Dustproof fan blade of the present invention is made by the novel antistatic bending-resisting polypropylene material, wherein said novel antistatic bending-resisting polypropylene material is made by the component of hundred parts of proportionings of following weight: 58% homopolymer polypropylene, 1.7% alkyl benzene sulphonate (ABS)-Si Wan Ji phosphonium salt (tetraalkylphosphonium alkylbenzene sulfonate), 32% 300-500 millimeters long, filament diameter is the glass fiber of 10-20 micron, the terra alba of 8% fineness 5-40 micron, 0.3% oxidation inhibitor.
In proportion above-mentioned each component is put into high mixer, mixing and stirring, and by twin screw extruder mixing (employed twin screw extruder screw diameter is 39mm, length-to-diameter ratio is 35. to wear the weightless feeder of 2kg range), under 180-285-185-190 degree centigrade, extrude, tank cooling back granulation is crossed in traction then, and particle length is 2-3mm.Utilize above-mentioned particle to produce dustproof fan blade by technology commonly used.
Comparative Examples 11
Dustproof fan blade of the present invention is made by the novel antistatic bending-resisting polypropylene material, wherein said novel antistatic bending-resisting polypropylene material is made by the component of hundred parts of proportionings of following weight: 58.3% homopolymer polypropylene, 1% 1-butyl-3 Methylimidazole-1,1,2,2 tetrafluoro ethyl sulfonate (1-butyl-3-methylimidazolium1,1,2,2-tetrafluoroethanesulfonate), 30% 300-500 millimeters long, filament diameter is the glass fiber of 10-20 micron, the terra alba of 10% fineness 5-40 micron, 0.7% oxidation inhibitor.
In proportion above-mentioned each component is put into high mixer, mixing and stirring, and by twin screw extruder mixing (employed twin screw extruder screw diameter is 39mm, length-to-diameter ratio is 35. to wear the weightless feeder of 2kg range), under 180-285-185-190 degree centigrade, extrude, tank cooling back granulation is crossed in traction then, and particle length is 2-3mm.Utilize above-mentioned particle to produce dustproof fan blade by technology commonly used.
Comparative Examples 12
Dustproof fan blade of the present invention is made by the novel antistatic bending-resisting polypropylene material, wherein said novel antistatic bending-resisting polypropylene material is made by the component of hundred parts of proportionings of following weight: 59.7% homopolymer polypropylene, 31% 300-500 millimeters long, filament diameter is the glass fiber of 10-20 micron, the terra alba of 9% fineness 5-40 micron, 0.3% oxidation inhibitor.
In proportion above-mentioned each component is put into high mixer, mixing and stirring, and by twin screw extruder mixing (employed twin screw extruder screw diameter is 39mm, length-to-diameter ratio is 35. to wear the weightless feeder of 2kg range), under 180-285-185-190 degree centigrade, extrude, tank cooling back granulation is crossed in traction then, and particle length is 2-3mm.Utilize above-mentioned particle to produce dustproof fan blade by technology commonly used.
The test of carrying out melting index, transmittance, surface resistivity and notched Izod impact strength behind the corresponding batten is processed in the foregoing description 1-6 and the injection moulding of Comparative Examples 7-12 gained particle, and test result is as shown in the table:
Test-results in the last table shows that embodiment 1 to 6 is for being added with at least two kinds of composite static inhibitor groups, and total addition level maintains 0.5%～4% proportion, and when keeping excellent anti bendability and mechanical property, surface resistivity can reduce to 10
12Ω/m
2～10
13Ω/m
2Grade; Relatively, add the single component static inhibitor respectively in Comparative Examples 7 to 11, its surface resistivity reaches 10
14Ω/m
2～10
15Ω/m
2Grade.
This shows, contrast the antistatic system of existing single component, the antistatic compound system of the present invention can make the system surface resistivity that 10-100 decline is doubly arranged, thereby can guarantee the balance of best static resistance, resistance to bending and mechanical property, and be applicable to bending-resisting polypropylene production of articles to electrostatic sensitive, as dustproof blade, outdoor plastics goods, make various mechanical component, particularly auto parts, and the pipeline of erosion resistance, pipe fitting, valve etc.
Claims (7)
1. novel antistatic bending-resisting polypropylene dustproof fan blade, form by following components in weight percentage:
Acrylic resin 56.5%～60.5%
Static inhibitor 0.5%～4%
Glass fibre 28%～32%
Terra alba 8%-10%
Additive 0%～1%
2. a kind of novel antistatic bending-resisting polypropylene dustproof fan blade according to claim 1 is characterized in that described acrylic resin is a homopolymer polypropylene.
3. a kind of novel antistatic bending-resisting polypropylene dustproof fan blade according to claim 1 is characterized in that described static inhibitor is selected from least two kinds in alkyl stearate, oxyethyl group alkyl amine, alkyl benzene sulphonate (ABS)-four alkane base phosphonium salt and the alkyl perfluorinated sulfonic acid imidazole salts.
4. a kind of novel antistatic bending-resisting polypropylene dustproof fan blade according to claim 1 is characterized in that described glass fibre is the 300-500 millimeters long, and filament diameter is the glass fiber of 10-20 micron.
5. a kind of novel antistatic bending-resisting polypropylene dustproof fan blade according to claim 1 is characterized in that described terra alba forms fineness 5-40 micron by plaster of paris grinding.
6. a kind of novel antistatic bending-resisting polypropylene dustproof fan blade according to claim 1 is characterized in that described additive is selected from least a in oxidation inhibitor, UV light stabilizing agent and the releasing agent.
7. method for preparing the described novel antistatic bending-resisting polypropylene dustproof fan blade of claim 1 may further comprise the steps:
A, in proportion acrylic resin, static inhibitor and glass fibre, terra alba and additive are put into high mixer, mixing and stirring;
B, mixed raw materials is put into the barrel of twin screw extruder, under 160-220 ℃, extrude traction, cross tank cooling back granulation;
C, utilize above-mentioned particle to produce dustproof fan blade by technology commonly used.
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| CN103183863A (en) * | 2013-04-15 | 2013-07-03 | 杭州邦德市政塑管有限公司 | Antistatic PE (Polyethylene) material |
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| CN106750965A (en) * | 2016-12-28 | 2017-05-31 | 宁波朗迪叶轮机械有限公司 | A kind of two-wheel shell axial-flow leaf and preparation method thereof |
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| CN106633405A (en) * | 2016-12-28 | 2017-05-10 | 安徽朗迪叶轮机械有限公司 | Centrifugal fan blade and preparation method thereof |
| CN106867105A (en) * | 2017-02-23 | 2017-06-20 | 温州正尚塑胶科技有限公司 | A kind of anlistatig polypropylene decorative panel and preparation method thereof |
| WO2018170771A1 (en) * | 2017-03-22 | 2018-09-27 | Solvay Sa | Polyolefin based composite material |
| WO2018171554A1 (en) * | 2017-03-22 | 2018-09-27 | Solvay Sa | Polyolefin based composite material |
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