CN103613853B - A kind of transparent glass fiber reinforced polypropylene compound material and its preparation method - Google Patents
A kind of transparent glass fiber reinforced polypropylene compound material and its preparation method Download PDFInfo
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- CN103613853B CN103613853B CN201310566036.1A CN201310566036A CN103613853B CN 103613853 B CN103613853 B CN 103613853B CN 201310566036 A CN201310566036 A CN 201310566036A CN 103613853 B CN103613853 B CN 103613853B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
- B29B9/14—Making granules characterised by structure or composition fibre-reinforced
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/72—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7461—Combinations of dissimilar mixers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/88—Adding charges, i.e. additives
- B29B7/90—Fillers or reinforcements, e.g. fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Reinforced Plastic Materials (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
Abstract
The present invention discloses a kind of transparent glass fiber reinforced polypropylene compound material and its preparation method. Described polypropylene composite material comprises polypropylene 67.1-91.7%; Distilled water 0.1-0.3%; Compatilizer 3-7%; Glass fibre 5-25%; Lubricant 0.2-0.6%. It has very high transparency, toughness and high rigidity, can be widely used in accumulator housing, to substitute traditional transparent ABS material, cost is cheaper. Transparent glass fiber reinforced polypropylene compound material of the present invention is taking PP resin as matrix component, in melting extrusion, each component acts synergistically, transparent glass fiber reinforced polypropylene compound material is made to have high transparency, and the processing characteristics of excellence and mechanical property. Its technique is simple, and condition is easily controlled, with low cost, low for equipment requirements, is suitable for suitability for industrialized production.
Description
Technical field
The present invention relates to technical field of polymer materials, particularly relate to a kind of transparent glass fiber reinforced polypropylene compound material and its preparation method.
Background technology
Polypropylene (PP) is most popular one in general plastics, and the method that it carries out modification is various, and product is more comprehensive. Such as the polypropylene of mineral enhancing modified and fiberglass reinforced modification at present has been widely used in automotive industry, and simultaneously flame-retardant modified and high light polypropylene has also been widely used in small household appliances industry etc. And at battery industry, the transparency requirement of accumulator housing material is higher, object is the solution position that the light transmission by material sees inside battery clearly, facilitate subsequent operations, owing to ABS has good light transmission, if and utilize other material manufactures, can cause that transparency is not good or cost is too high, the use material of therefore traditional shell of tank is generally transparent ABS.
But the urgent expectation increasing and reducing costs further along with the battery industry market requirement, the application of new material becomes one of hot research. Wherein, transparent glass fiber Reinforced Polypropylene has certain light transmission, and shrinking percentage is suitable with ABS, directly can use on existing mold basis, and cost is lower, therefore, utilize polypropylene produce higher clarity, ABS can be replaced at the matrix material of the application of battery industry and become research and development emphasis and become a reality.
For ensureing that the polypropylene material obtained has good transparency and intensity simultaneously, existing transparent glass fiber Reinforced Polypropylene is taking polypropylene as main base material, add glass fibre (mainly high-alkali and medium-alkali glass fiber) to strengthen intensity, and add white mineral oil mixed melting and obtain. Wherein, white mineral oil is great on the impact of material transparency, therefore the usual added ingredients of conventional transparent fiber glass reinforced polypropylene material is become, because white mineral oil is extracted from crude oil the light lubricating oil fractions of 250��400 DEG C, water white transparency, the glossy and fanout free region in surface, can be combined with the organic substance melted mutually, form the matrix material with fine surface transparent degree. But the present invention obtains the fiber glass reinforced polypropylene having excellent transparency and high strength and reducing costs further, from different preparation designs, develops product innovation.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency of prior art, it is provided that one has high-clarity, high strength and low-shrinkage, it is possible to substitute the transparent glass fiber reinforced polypropylene compound material of transparent ABS as store battery sheating material.
Another object of the present invention is to provide a kind of technique simple, cost is low, the preparation method of the transparent glass fiber reinforced polypropylene compound material being easy to operate and control.
In order to realize foregoing invention object, the technical scheme of the present invention is as follows:
A kind of transparent glass fiber reinforced polypropylene compound material, comprises the component of following weight percent:
And, the preparation method of a kind of transparent glass fiber reinforced polypropylene compound material, comprises the following steps:
Each component is taken respectively according to the formula of above-mentioned transparent glass fiber reinforced polypropylene compound material;
Take each component carry out mixing treatment by described, obtain mixture;
Described mixture is carried out melting extrude, granulation, obtain described transparent glass fiber reinforced polypropylene compound material.
Above-mentioned transparent glass fiber reinforced polypropylene compound material take polypropylene as base material, add appropriate glass fibre to reach desirable strength, by compatilizer etc., each for matrix material component is combined again, melt blending is extruded, make to play between each component synergy, obtained required polypropylene composite material. The present inventor finds under study for action, distilled water is adopted to substitute in traditional method the white mineral oil used, because the boiling point of distilled water is 100 DEG C, so at manufacture processing temperature 140-180 DEG C of Reinforced Polypropylene mixture, small molecules volatile matter can be taken away by distilled water from making process of mixture, it greatly reduces the mist degree of mixture, significantly improves the transparency of matrix material, and be easy to control transparency and each raw material be easy to get, cheap.
The preparation method of above-mentioned transparent glass fiber reinforced polypropylene compound material only need to by formula by the mixing of each component and at a proper temperature melting extrude and can obtain product, its preparation method technique is simple, and condition is easily controlled, with low cost, feature low for equipment requirements, is suitable for suitability for industrialized production.
Embodiment
In order to make the technical problem to be solved in the present invention, technical scheme and useful effect clearly understand, below in conjunction with embodiment, the present invention is further elaborated. It is to be understood that specific embodiment described herein is only in order to explain the present invention, it is not intended to limit the present invention.
The embodiment of the present invention provides a kind of transparent glass fiber reinforced polypropylene compound material, comprises the component of following weight percent:
Specifically, above-mentioned polypropylene comprises homopolymerization PP, copolymerization PP and random copolymerization PP, and wherein, the transparency of random copolymerization PP is the highest, for the present invention prepares the preferred substrates of transparent material. In random copolymerization PP, it is preferable that shock strength is greater than the PP of 65J/M, the such as RE420MO of Northern Europe chemical industry, the R370Y of Korea S SK, such selection is suitable for the strength demand of battery jar sheating material.
The preferred repeatedly distilled water of above-mentioned distilled water is purer water, its calcination slag content��0.001%, water white transparency. The preparation method of existing repeatedly distilled water has: add alkaline permanganate solution in first water, removes organism and carbonic acid gas; Add non-volatile acid (sulfuric acid or phosphoric acid), make ammonia become nonvolatile ammonium salt, and adopt quartz distillation vessel carry out two times or repeatedly distill, because only containing the component that can be dissolved in water on a small quantity in glass, purer water can be obtained so after distillation, i.e. repeatedly distilled water. The object adding distilled water takes away small-molecule substance by vacuum system in preparation polypropylene composite material, greatly reduces the mist degree of mixture, it is achieved the good transparency. And utilize distilled water purity height, impurity is few and boiling point is lower character, simple to operate, condition is easily controlled, and is easy to the material transparency needed for realizing.
Above-mentioned compatilizer preferably transparent degree > 75%, melting index is 230 DEG C/2.16KG in 100-150g/10min(test condition) PP grafted maleic anhydride in scope, like this can so that the present invention moisture polypropylene composite material each component between there is better consistency and associativity so that whole matrix material more easily obtains desired character.
Above-mentioned glass fibre (i.e. glass) can be divided into alkali-free glass fiber, medium-alkali glass fiber and high-alkali glass, it may also be useful to different glasses can prepare the strongthener of different performance and feature. What prior art was more is use high-alkali combination with white mineral oil with medium-alkali glass fiber to prepare transparent Reinforced Polypropylene, and the present invention is preferably combined with moisture compound system without alkalescence glass, it is possible to obtain the more excellent high strength under low glass fiber content, the polypropylene of high-clarity. Because alkali metal oxide content is very low in alkali-free glass fiber, being generally not more than 2%, the distilled water reaction probabilities adopted with the present invention is minimum, it is possible to farthest falling low haze, comparing with medium-alkali glass fiber with high-alkali glass is optimal selection.
The preferred inside and outside lubricant agent Compositional type of above-mentioned lubricant, and the weight ratio of internal lubricant and external lubricant is 2:(1-2.5). Wherein, the frictional force of internal lubricant for reducing in polymer processing in polymer molecular chain, external lubricant for reducing polymkeric substance in molding process with forming process machinery surface interface frictional force, when both ratios are 2:1-2.5 (concrete example is such as 2:2.1,2:2.4 etc.), the fusion of each component in inventive formulation system can be promoted well, the surface flatness of strongthener and glossiness. In a preferred embodiment, internal lubricant selective oxidation polyethylene wax, external lubricant selects amide waxe.
The embodiment of the present invention is with the use of distilled water, atactic copolymerized polypropene, transparent glass fiber reinforced polypropylene is realized without alkalescence glass, can, so that material has optimum high-clarity, high strength and low-shrinkage concurrently, be do to substitute the most suitable material that transparent ABS does store battery shell. Specifically, the transparency of random copolymerization PP is the highest, provides basis for the present invention prepares transparent material; Adopt repeatedly distilled water, impurity is minimum, making in process of mixture, small molecules volatile matter can be taken away again, thus reduce the mist degree of mixture better, improve the material transparency, adding alkali metal oxide content in alkali-free glass fiber low, the distilled water reaction probabilities adopted with the present invention is minimum, reduce further mist degree like this and enhances the transparency.
Correspondingly, the embodiment of the present invention additionally provides the preparation method of a kind of transparent glass fiber reinforced polypropylene compound material, comprises the following steps:
S01, take each component respectively according to above-mentioned transparent glass fiber reinforced polypropylene compound material formula;
S02, take each component carry out mixing treatment by described, obtain mixture;
S03, described mixture carries out melting extruding, granulation, obtains described transparent glass fiber reinforced polypropylene compound material.
Specifically, each component preferred content in the formula of the transparent glass fiber reinforced polypropylene compound material in above-mentioned steps S01 and formula and kind as described above, in order to save length, do not repeat them here.
In above-mentioned steps S02, the time that each component carries out mixing treatment can adjust flexibly according to actual production conditions, as long as each component is palmed off as point in advance, the equipment such as mixing can be mixing machine etc. In a preferred embodiment, mixing treatment is by each component in (as rotating speed is greater than 300r/min) combination treatment 10��15 minutes at a high speed so that each component mixes.
In above-mentioned steps S03, the technique that can adopt this area routine is extruded in the melting of mixture. In order to make each component better act synergistically in melting is extruded, give the more excellent transparency of above-mentioned transparent glass fiber reinforced polypropylene compound material and intensity, in a preferred embodiment, it is adopt twin screw extruder melting to extrude that mixture melting is extruded, extruding Shi Gewen district temperature controls at 140-180 DEG C, the boiling point of the white mineral oil that this temperature uses well below tradition, but but higher than the boiling point of distilled water, impurity volatile matter can be taken away by water vapour, ensure the material transparency.
Now for concrete transparent glass fiber reinforced polypropylene compound material and its preparation method, the present invention is further elaborated. The transparent glass fiber reinforced polypropylene compound material that the present invention proposes, it is necessary to using following starting material: PP resin, distilled water, compatilizer, lubricant, glass fibre, wherein, PP selects atactic copolymerized polypropene, and its shock strength is greater than 65J/M.
Wherein, PP Choice of Resin atactic copolymerized polypropene, such as the R370Y of the RE420MO or Korea S SK of Northern Europe chemical industry; Distilled water selects repeatedly distilled water; Oxidized polyethlene wax and the amide waxe of any company selected by lubricant; Glass selects the nothing alkalescence glass of any company; Compatilizer selects the PP grafted maleic anhydride that Shenzhen Ke Ju novel material company limited produces, and the trade mark is 8010-MAH-2.
Embodiment all uses the raw material given by the present invention and preparation method; The each component unit of following examples is all weight percentage (%).
Embodiment 1
By PP resin 91.7, distilled water 0.1, compatilizer 3, lubricant 0.2, glass 5, mixed starting material in advance, are then placed in mixed raw material that twin screw extruder squeezes through melting, granulation, its extrusion temperature 140-180 DEG C.
Embodiment 2
By PP resin 85.55, distilled water 0.15, compatilizer 4, lubricant 0.3, glass 10, mixed starting material in advance, are then placed in mixed raw material that twin screw extruder squeezes through melting, granulation, its extrusion temperature 140-180 DEG C.
Embodiment 3
By PP resin 79.4, distilled water 0.2, compatilizer 5, lubricant 0.4, glass 15, mixed starting material in advance, are then placed in mixed raw material that twin screw extruder squeezes through melting, granulation, its extrusion temperature 140-180 DEG C.
Embodiment 4
By PP resin 73.25, distilled water 0.25, compatilizer 6, lubricant 0.5, glass 20, mixed starting material in advance, are then placed in mixed raw material that twin screw extruder squeezes through melting, granulation, its extrusion temperature 140-180 DEG C.
Embodiment 5
By PP resin 67.1, distilled water 0.3, compatilizer 7, lubricant 0.6, glass 25, mixed starting material in advance, are then placed in mixed raw material that twin screw extruder squeezes through melting, granulation, its extrusion temperature 140-180 DEG C. Performance test:
Tensile strength (units MPa) is checked by ASTMD-638 standard. Specimen types is I type, batten size (mm): (176 �� 2) (length) �� (12.6 �� 0.2) (end width) �� (3.05 �� 0.2) (thickness), and draw speed is 50mm/min;
Flexural strength and modulus in flexure are checked by ASTMD-790 standard. Specimen types is specimen size (mm): (128 �� 2) �� (12.67 �� 0.2) �� (3.11 �� 0.2), and rate of bending is 20mm/min;
Izod notched impact strength is checked by ASTMD-256 standard. Specimen types is I type, specimen size (mm): (63 �� 2) �� (12.45 �� 0.2) �� (3.1 �� 0.2); Breach type is A class, and breach residual thickness is 1.9mm;
Full light transmission rate is tested according to ASTMD-1003, batten thickness 2mm;
Wherein, the unit of shock strength is J/m; The unit of elongation at break, full light transmission rate is all %;
Density is tested according to ASTMD-792. The performance test of embodiment 1-5 is in table 1:
Table 1
| Composition (%) | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| PP | 91.7 | 85.55 | 79.4 | 73.25 | 67.1 |
| Distilled water | 0.1 | 0.15 | 0.2 | 0.25 | 0.3 |
| Compatilizer | 3 | 4 | 5 | 6 | 7 |
| Glass fibre | 5 | 10 | 15 | 20 | 25 |
| Lubricant | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 |
| Shock strength | 90 | 120 | 132 | 140 | 132 |
| Tensile strength | 26 | 38 | 48 | 64 | 70 |
| Elongation at break | 16.1 | 14.8 | 13.5 | 12.2 | 8.6 |
| Flexural strength (MPa) | 35 | 62 | 75 | 93 | 102 |
| Modulus in flexure (MPa) | 1400 | 1800 | 2300 | 2650 | 2780 |
| Density (g/cm3) | 0.93 | 0.96 | 1.00 | 1.04 | 1.08 |
| Full light transmission rate (%) | 80 | 76 | 74 | 70 | 65 |
Can find out that the various aspects of performance of material comparatively balances by table 1 embodiment, along with the increase of glass fiber content, the rigidity of material increases, but transparency reduces more, taking the density identical with ABS as key index, during the present invention's 20% glass fiber content, the density of material is identical with ABS, and transmittance is higher, reach 70%, and shock strength reaches maximum value 140J/M.
Taking prior art transparent ABS as comparative example (such as table 2):
Table 2
The comparatively close of the every mechanical property of transparent ABS and the embodiment of the present invention can be found out from table 2 comparative example, the PP matrix material utilizing the technical scheme of the present invention obtained can substitute transparent ABS, meet the materials demand of battery industry, and cost compares ABS reduction by 40%.
The foregoing is only the better embodiment of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. done within the spirit and principles in the present invention, all should be included within protection scope of the present invention.
Claims (9)
1. a transparent glass fiber reinforced polypropylene compound material, it is characterised in that, the component comprising following weight percent is made:
Described transparent glass fiber reinforced polypropylene compound material is extruded through melting by above-mentioned each component and is made, and the temperature that described melting is extruded is 140-180 DEG C, calcination slag content��0.001% of described distilled water.
2. transparent glass fiber reinforced polypropylene compound material as claimed in claim 1, it is characterised in that, described glass fibre is alkali free glass fibre.
3. transparent glass fiber reinforced polypropylene compound material as claimed in claim 1, it is characterised in that, described polypropylene is atactic copolymerized polypropene.
4. transparent glass fiber reinforced polypropylene compound material as claimed in claim 1, it is characterised in that, described distilled water is repeatedly distilled water.
5. transparent glass fiber reinforced polypropylene compound material as described in item as arbitrary in claim 1-4, it is characterised in that, described compatilizer is PP grafted maleic anhydride, and its transparency is greater than 75%, and melting index is 100-150g/10min.
6. transparent glass fiber reinforced polypropylene compound material as described in item as arbitrary in claim 1-4, it is characterised in that, described lubricant is inside and outside lubricant Compositional type lubricant, and wherein, the weight ratio of internal lubricant and external lubricant is 2:(1-2.5).
7. transparent glass fiber reinforced polypropylene compound material as claimed in claim 6, it is characterised in that, described internal lubricant is oxidized polyethlene wax, and external lubricant is amide waxe.
8. the preparation method of a transparent glass fiber reinforced polypropylene compound material, it is characterised in that, comprise following preparation process:
Each component is taken respectively according to the formula of the arbitrary described transparent glass fiber reinforced polypropylene compound material of claim 1��7;
Take each component carry out mixing treatment by described, obtain mixture;
Described mixture being carried out melting extrude, granulation, obtain described transparent glass fiber reinforced polypropylene compound material, the temperature that described melting is extruded is 140-180 DEG C.
9. the preparation method of transparent glass fiber reinforced polypropylene compound material as claimed in claim 8, it is characterised in that, it is adopt twin-screw extrusion that described melting is extruded.
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| CN108003475B (en) * | 2017-11-07 | 2021-04-02 | 日丰企业集团有限公司 | Heat-resistant reinforced polypropylene pipe and preparation method thereof |
| CN114181453B (en) * | 2021-11-04 | 2023-07-18 | 金发科技股份有限公司 | Low-friction-coefficient low-atomization polypropylene material and preparation method and application thereof |
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| CN102241860A (en) * | 2010-11-30 | 2011-11-16 | 深圳市科聚新材料有限公司 | Reinforced polypropylene material and preparation method thereof |
| CN102617929A (en) * | 2012-03-19 | 2012-08-01 | 深圳市科聚新材料有限公司 | High-gloss modified polypropylene resin and preparation method for same |
| CN102731905A (en) * | 2012-05-22 | 2012-10-17 | 宁波泛龙塑料新材料有限公司 | Long glass fiber reinforced modified polypropylene and preparation method thereof |
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| CN102241860A (en) * | 2010-11-30 | 2011-11-16 | 深圳市科聚新材料有限公司 | Reinforced polypropylene material and preparation method thereof |
| CN102617929A (en) * | 2012-03-19 | 2012-08-01 | 深圳市科聚新材料有限公司 | High-gloss modified polypropylene resin and preparation method for same |
| CN102731905A (en) * | 2012-05-22 | 2012-10-17 | 宁波泛龙塑料新材料有限公司 | Long glass fiber reinforced modified polypropylene and preparation method thereof |
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