CN107641255B - Glass fiber reinforced polypropylene composite material and preparation method thereof - Google Patents
Glass fiber reinforced polypropylene composite material and preparation method thereof Download PDFInfo
- Publication number
- CN107641255B CN107641255B CN201710980964.0A CN201710980964A CN107641255B CN 107641255 B CN107641255 B CN 107641255B CN 201710980964 A CN201710980964 A CN 201710980964A CN 107641255 B CN107641255 B CN 107641255B
- Authority
- CN
- China
- Prior art keywords
- glass fiber
- fiber reinforced
- composite material
- reinforced polypropylene
- polypropylene composite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a glass fiber reinforced polypropylene composite material and a preparation method thereof, wherein the raw materials comprise 10-25% of polypropylene by mass percent; 50% -80% of barium sulfate master batch; 5% -15% of short glass fiber reinforcement; 1% -10% of interfacial compatilizer; 0.1 to 3 percent of coupling agent; 0.1 to 1 percent of antioxidant. According to the glass fiber reinforced polypropylene composite material and the preparation method thereof, the master batch is used for replacing powder, so that the pollution of a large amount of dust is avoided, the environment is protected, and the dispersion conditions of the mineral filling and the chopped glass fiber are obviously improved through the compounding of the interfacial compatilizer and the titanate coupling agent, so that the prepared glass fiber reinforced polypropylene composite material has good impact strength, impact resistance and sound insulation.
Description
Technical Field
The invention relates to the field of chemical materials and the like, in particular to a glass fiber reinforced polypropylene composite material and a preparation method thereof.
Background
The polypropylene PP is a widely used general plastic, has excellent comprehensive performance and molding processing type, is relatively low in price, has a leading position in plastics, and is widely applied to daily life. However, polypropylene modified materials are rarely filled at high density.
Because the defects are caused by the defects of the polypropylene PP material, the polypropylene PP material has low density, and the high-density polypropylene composite material is prepared by a large amount of mineral filling, but the impact resistance of the prepared composite material is greatly reduced along with the increase of the mineral filling, and the filling of the polypropylene base material is reduced along with the increase of the mineral filling, and the internal system of the composite material is broken down, so that the composite material is embrittled, and cannot be used as a modified material.
Disclosure of Invention
The purpose of the invention is: the glass fiber reinforced polypropylene composite material and the preparation method thereof are provided to solve the problem of embrittlement of the composite material caused by the increase of mineral filling and the decrease of filling of polypropylene base materials of the existing polypropylene composite material.
In order to solve the prior technical problems: the invention provides a glass fiber reinforced polypropylene composite material, which comprises 10-25% of polypropylene by mass percent; 50% -80% of barium sulfate master batch; 5% -15% of short glass fiber reinforcement; 1% -10% of interfacial compatilizer; 0.1 to 3 percent of coupling agent; 0.1 to 1 percent of antioxidant.
In a preferred embodiment of the present invention, the polypropylene is a co-polypropylene having a melt index of 30g/10min-70g/10min under the test conditions of 230 ℃ and 2.16 Kg.
In a preferred embodiment of the present invention, the barium sulfate masterbatch comprises, by mass, 80% -98% of barium sulfate, and the mesh number of the barium sulfate masterbatch is 7000-9000 mesh; the high-density polyethylene carrier and the rest have a melt index of 1g/10min-3g/10min under the test conditions of 230 ℃ and 2.16 Kg.
In a preferred embodiment of the present invention, the short glass fiber reinforcement has a fiber diameter of 7-13 um and a chopped length of 3-4.5 um.
In a preferred embodiment of the present invention, the short glass fiber reinforcement includes at least one of a circular chopped glass fiber, an elliptical chopped glass fiber and a triangular chopped glass fiber.
In a preferred embodiment of the present invention, the interfacial compatibilizer is maleic anhydride grafted polypropylene, and the grafting ratio is 0.3% to 2%.
In a preferred embodiment of the present invention, the coupling agent is one of a silane coupling agent or a titanate coupling agent.
In a preferred embodiment of the present invention, the antioxidant is at least one of pentaerythritol tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], phenyl tris (2, 4-di-tert-butyl) phosphite, and dioctadecyl thiodipropionate.
In order to solve the prior technical problems: the invention also provides a preparation method of the glass fiber reinforced polypropylene composite material, which comprises the following steps of obtaining the raw material of the glass fiber reinforced polypropylene composite material; mixing and drying polypropylene, barium sulfate master batches, an interfacial compatilizer, a coupling agent and an antioxidant in the raw materials to obtain a first mixture; placing the first mixture in a main feeding bin of a meshing co-rotating double-screw extruder, and conveying the first mixture into a main machine cylinder through a feeding screw; adding short glass fiber reinforcements in the raw materials into the main machine cylinder from a side feeding port to be mixed with the first mixture, melting and extruding through an extruding screw to obtain an extrudate; and cooling, granulating and drying the extrudate to obtain the glass fiber reinforced polypropylene composite material.
In a preferred embodiment of the invention, the diameter of the extrusion screw is 30mm-40mm, and the length-diameter ratio L/D is 35-40; the main frame section of thick bamboo is equipped with a plurality of temperature sections from the charge door to the aircraft nose export, the temperature section of thick bamboo sets gradually: the rotating speed of the extruding screw is 150 r/min at 70 ℃, 190 ℃, 210 ℃, 220 ℃ and 220 ℃.
The invention has the advantages that: according to the glass fiber reinforced polypropylene composite material and the preparation method thereof, the master batch is used for replacing powder, so that the pollution of a large amount of dust is avoided, the environment is protected, the dispersion conditions of the mineral filling and the chopped glass fiber are obviously improved through the compounding of the interfacial compatilizer and the titanate coupling agent, so that the prepared glass fiber reinforced polypropylene composite material has good impact strength, impact resistance and sound insulation, and the rigidity index of the composite material is reduced due to the addition of a large amount of mineral filling, and a part of chopped glass fiber is selected for replacing the mineral filling, so that the requirement of large-size parts on the performance index of raw materials in automobile design is met. When the interface compatilizer or the titanate coupling agent is not added, the impact resistance of the composite material is lower than that of the conventional material by 100 percent or more, and with the addition of the content of the interface compatilizer or the titanate coupling agent, the impact resistance of the composite material is greatly improved, and besides, the rest rigidity performance of the composite material is not reduced, and the sound insulation performance is also slightly improved. Research shows that the prepared high-density glass fiber reinforced polypropylene composite material has good sound insulation effect in the periphery of automobile engines and other fields. Compared with the traditional high-mineral filled polypropylene material, the composite material with better system dispersion is prepared by matching the short glass fiber with the traditional high-mineral filled polypropylene material due to the low impact strength and under the common assistance of the interfacial compatilizer and the titanate coupling agent. The impact property of the prepared composite material is improved by 70-80% compared with the traditional impact property, and simultaneously, the composite material has good sound insulation, higher thermal deformation temperature and higher melt flow rate, and is a special modified material for large structural parts which is beneficial to high density requirements.
Detailed Description
The following examples 1-5 are further illustrations of the invention, wherein the following examples use starting materials:
the polypropylene is copolymerized propylene, and has a melt index MFR of 60g/10min (230 ℃ C., 2.16 Kg).
Barium sulfate master batch: a1985, 80% solid content, 8000 meshes.
Chopped glass fiber: ECS-305H, diameter of 13um, chopped length of 4.5 mm.
Interface compatilizer: the maleic anhydride grafted polypropylene CMG-5001 has a grafting rate of 0.8 percent in chemical tests.
Titanate coupling agent: FD-201.
The chemical name of the antioxidant 1010 is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester.
Antioxidant 168, chemical name tris [ 2.4-di-tert-butylphenyl ] phosphite.
Wherein Table 1 below shows the mass of each component in the raw materials selected in each of examples 1-5.
Table 1: the quality of each component of the feedstock in examples 1-5. (Unit: gram)
Example 1: namely, the raw materials are weighed according to the components corresponding to the examples shown in the table 1: 10g of polypropylene, 80g of barium sulfate master batch, 5g of chopped glass fiber reinforcement, 2g of interfacial compatilizer, 3g of titanate coupling agent and 0.6g of antioxidant. Uniformly mixing all components except the chopped glass fiber reinforcement in a high-speed mixer, putting the components into a main feeding bin of a double-screw extruder, putting the chopped glass fiber reinforcement into a side feeding bin, wherein the diameter of an extrusion screw is 35mm, the length-diameter ratio L/D is 35, and the temperature of each subarea of a main machine cylinder from a feeding port to a machine head outlet is set as follows: the high-density glass fiber reinforced polypropylene composite material is prepared by melt extrusion, cooling, granulation and drying at the temperature of 70 ℃, 190 ℃, 210 ℃, 220 ℃ and the rotating speed of a main engine of 150 r/min.
Example 2: namely, the raw materials are weighed according to the components corresponding to the examples shown in the table 1: 10g of polypropylene, 68g of barium sulfate master batch, 10g of chopped glass fiber reinforcement, 2g of interfacial compatilizer, 1g of titanate coupling agent and 1g of antioxidant. Uniformly mixing all components except the chopped glass fiber reinforcement in a high-speed mixer, putting the components into a main feeding bin of a double-screw extruder, putting the chopped glass fiber reinforcement into a side feeding bin, wherein the diameter of an extrusion screw is 35mm, the length-diameter ratio L/D is 35, and the temperature of each subarea of a main machine cylinder from a feeding port to a machine head outlet is set as follows: the high-density glass fiber reinforced polypropylene composite material is prepared by melt extrusion, cooling, granulation and drying at the temperature of 70 ℃, 190 ℃, 210 ℃, 220 ℃ and the rotating speed of a main engine of 150 r/min.
Example 3: namely, the raw materials are weighed according to the components corresponding to the examples shown in the table 1: 15g of polypropylene, 70g of barium sulfate master batch, 8g of chopped glass fiber reinforcement, 3g of interfacial compatilizer, 3g of titanate coupling agent and 1g of antioxidant. Uniformly mixing all components except the chopped glass fiber reinforcement in a high-speed mixer, putting the components into a main feeding bin of a double-screw extruder, putting the chopped glass fiber reinforcement into a side feeding bin, wherein the diameter of an extrusion screw is 35mm, the length-diameter ratio L/D is 35, and the temperature of each subarea of a main machine cylinder from a feeding port to a machine head outlet is set as follows: the high-density glass fiber reinforced polypropylene composite material is prepared by melt extrusion, cooling, granulation and drying at the temperature of 70 ℃, 190 ℃, 210 ℃, 220 ℃ and the rotating speed of a main engine of 150 r/min.
Example 4: namely, the raw materials are weighed according to the components corresponding to the examples shown in the table 1: 22g of polypropylene, 58g of barium sulfate master batch, 12g of chopped glass fiber reinforcement, 6g of interfacial compatilizer, 1.4g of titanate coupling agent and 0.6g of antioxidant. Uniformly mixing all components except the chopped glass fiber reinforcement in a high-speed mixer, putting the components into a main feeding bin of a double-screw extruder, putting the chopped glass fiber reinforcement into a side feeding bin, wherein the diameter of an extrusion screw is 35mm, the length-diameter ratio L/D is 35, and the temperature of each subarea of a main machine cylinder from a feeding port to a machine head outlet is set as follows: the high-density glass fiber reinforced polypropylene composite material is prepared by melt extrusion, cooling, granulation and drying at the temperature of 70 ℃, 190 ℃, 210 ℃, 220 ℃ and the rotating speed of a main engine of 150 r/min.
Example 5: namely, the raw materials are weighed according to the components corresponding to the examples shown in the table 1: 25g of polypropylene, 50g of barium sulfate master batch, 15g of chopped glass fiber reinforcement, 10g of interfacial compatilizer, 0.1g of titanate coupling agent and 0.1g of antioxidant. Uniformly mixing all components except the chopped glass fiber reinforcement in a high-speed mixer, putting the components into a main feeding bin of a double-screw extruder, putting the chopped glass fiber reinforcement into a side feeding bin, wherein the diameter of an extrusion screw is 35mm, the length-diameter ratio L/D is 35, and the temperature of each subarea of a main machine cylinder from a feeding port to a machine head outlet is set as follows: the high-density glass fiber reinforced polypropylene composite material is prepared by melt extrusion, cooling, granulation and drying at the temperature of 70 ℃, 190 ℃, 210 ℃, 220 ℃ and the rotating speed of a main engine of 150 r/min.
Comparative example 1: weighing 19 g of polypropylene, 60g of barium sulfate master batch and 20 g of chopped glass fiber reinforcement, uniformly mixing all components except the chopped glass fiber reinforcement in a high-speed mixer, putting into a main feeding bin of a double-screw extruder, putting chopped glass fiber into a lateral feeding bin, wherein the diameter of an extrusion screw is 35mm, the length-diameter ratio L/D is 35, and the temperature of each partition of a main machine cylinder from a feeding port to a machine head outlet is set as: the high-density glass fiber reinforced polypropylene composite material is prepared by melt extrusion, cooling, granulation and drying at the temperature of 70 ℃, 190 ℃, 210 ℃, 220 ℃ and the rotating speed of a main engine of 150 r/min.
The performance of the glass fiber reinforced polypropylene composites obtained in examples 1 to 5 and the performance of the glass fiber reinforced polypropylene composite obtained in comparative example 1 were measured and compared.
And (3) product performance testing:
density: according to ISO1183 standard;
melt flow rate: the test is carried out according to the ISO1133 standard, and the test condition is 230 ℃ and 2.16 kg;
tensile property: the test is carried out according to ISO527-2 standard, and the test speed is 5 mm/min;
bending property: the method IS carried out according to the IS178 standard, the span IS 64mm, and the test speed IS 2 mm/min;
impact properties: the method is carried out on a simply supported beam impact tester according to ISO179-1 standard, and a sample strip notch is of an A type;
heat distortion temperature: according to ISO075-2 standard, the test pressure is 0.45 Mpa;
and (3) testing the sound insulation amount: the method is carried out according to the GB/T18696-2002 standard.
The test results are shown in table 2.
Table 2: test results of the glass fiber reinforced polypropylene composites obtained in examples 1 to 5 and comparative example 1.
As shown in the performance tests of examples 1-5 and comparative example 1 shown in Table 2, the composite system of the interfacial compatilizer and the titanate coupling agent can obviously improve the impact strength of the composite material without obviously reducing other mechanical performance indexes of the composite material.
Comparing the data of examples 4 and 5 and comparative example 1, it can be seen that under the condition that the filling of the high barium sulfate master batch and the chopped glass fiber reinforcement is not higher than that of comparative example 1, the main rigidity indexes of examples 4 and 5, such as tensile data and bending data, are greatly improved, indicating that the use of the interfacial compatilizer and the titanate coupling agent has an obvious enhancing effect on the mechanical properties of the composite material.
From examples 1-3, there is little difference in the main rigidity indexes of the composite material with the change of the ratio between the interfacial compatilizer and the titanate coupling agent, and the performance indexes of some products such as impact strength, melt flow rate and sound insulation are obviously enhanced, which shows that the mineral reinforcing system and the glass fiber reinforcing system in the composite material have ideal distribution conditions. The titanate coupling agent and the interfacial compatilizer are added into the composite system, so that the impact property of the material can be obviously improved, a good sound insulation effect is achieved, and with the adjustment of the proportion, when the proportion of the interfacial compatilizer to the titanate coupling agent reaches 2:1, various performance indexes of the composite material reach the best.
In summary, the high-density glass fiber reinforced polypropylene composite material described in the product is based on traditional mineral filling, and is added with chopped glass fibers, an interfacial compatilizer and a coupling agent, so that the rigidity index of the material is ensured while the composite material is filled at a high degree, the heat deformation temperature of the material is increased, and the sound insulation performance is better, so that the composite material can be applied to the field of high-density polypropylene materials.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The glass fiber reinforced polypropylene composite material is characterized by comprising the following raw materials in percentage by mass:
15% -22% of polypropylene;
58% -70% of barium sulfate master batch;
8% -12% of short glass fiber reinforcement;
2% -6% of an interfacial compatilizer;
1% -3% of a coupling agent;
0.6 to 1 percent of antioxidant;
the interfacial compatilizer is maleic anhydride grafted polypropylene, and the grafting rate is 0.3% -2%; the coupling agent is a titanate coupling agent; the addition amount ratio of the interfacial compatilizer to the coupling agent is 2: 1;
the barium sulfate master batch comprises the following components in percentage by mass: 80-98% of barium sulfate, and the mesh number is 7000-9000 meshes; the high-density polyethylene carrier and the rest have a melt index of 1g/10min-3g/10min under the test conditions of 230 ℃ and 2.16 Kg.
2. The glass fiber reinforced polypropylene composite according to claim 1, wherein: the polypropylene is copolymerized polypropylene, and the melt index of the polypropylene is 30g/10min-70g/10min under the test conditions of 230 ℃ and 2.16 Kg.
3. The glass fiber reinforced polypropylene composite according to claim 1, wherein: the fiber diameter in the short glass fiber reinforcement is 7um-13um, and the chopped length is 3um-4.5 um.
4. The glass fiber reinforced polypropylene composite according to claim 1, wherein: the short glass fiber reinforcement comprises at least one of a short glass fiber with a circular cross section, an oval short glass fiber and a triangular short glass fiber.
5. The glass fiber reinforced polypropylene composite according to claim 1, wherein: the antioxidant is at least one of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, tri (2, 4-di-tert-butyl) phenyl phosphite and dioctadecyl thiodipropionate.
6. A method of preparing a glass fiber reinforced polypropylene composite according to any one of claims 1 to 5, wherein: comprises the following steps of (a) carrying out,
obtaining raw materials of the glass fiber reinforced polypropylene composite material;
mixing and drying polypropylene, barium sulfate master batches, an interfacial compatilizer, a coupling agent and an antioxidant in the raw materials to obtain a first mixture;
placing the first mixture in a main feeding bin of a meshing co-rotating double-screw extruder, and conveying the first mixture into a main machine cylinder through a feeding screw;
adding short glass fiber reinforcements in the raw materials into the main machine cylinder from a side feeding port to be mixed with the first mixture, melting and extruding through an extruding screw to obtain an extrudate;
and cooling, granulating and drying the extrudate to obtain the glass fiber reinforced polypropylene composite material.
7. The method for preparing a glass fiber reinforced polypropylene composite material according to claim 6, wherein: the diameter of the extrusion screw is 30-40 mm, and the length-diameter ratio L/D is 35-40; the main frame section of thick bamboo is equipped with a plurality of temperature sections from the charge door to the aircraft nose export, the temperature section of thick bamboo sets gradually: the rotating speed of the extruding screw is 150 r/min at 70 ℃, 190 ℃, 210 ℃, 220 ℃ and 220 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710980964.0A CN107641255B (en) | 2017-10-19 | 2017-10-19 | Glass fiber reinforced polypropylene composite material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710980964.0A CN107641255B (en) | 2017-10-19 | 2017-10-19 | Glass fiber reinforced polypropylene composite material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107641255A CN107641255A (en) | 2018-01-30 |
| CN107641255B true CN107641255B (en) | 2020-08-25 |
Family
ID=61124350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710980964.0A Active CN107641255B (en) | 2017-10-19 | 2017-10-19 | Glass fiber reinforced polypropylene composite material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107641255B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108997652A (en) * | 2018-08-23 | 2018-12-14 | 安徽实力环保科技有限公司 | A kind of preparation method of glass fiber reinforced plastics product fiber reinforced polypropylene composite material |
| CN110682520B (en) * | 2019-10-09 | 2021-10-22 | 广东轻工职业技术学院 | A kind of preparation method of glass fiber reinforced thermoplastic resin composite material |
| CN112724533A (en) * | 2020-12-17 | 2021-04-30 | 辰东意普万新材料(广东)有限公司 | High-sound-insulation polypropylene composite material for automobile engine compartment and preparation method thereof |
| CN112795099B (en) * | 2021-01-18 | 2022-03-01 | 会通新材料股份有限公司 | Polypropylene reinforcing material for water purifier integrated water circuit board and preparation method thereof |
| CN114230959B (en) * | 2021-12-31 | 2024-02-13 | 广州仕天材料科技有限公司 | Polypropylene composite material grafted by styrene-acrylic emulsion, and preparation method and application thereof |
| CN114456492A (en) * | 2022-02-24 | 2022-05-10 | 禹州市建通塑胶管业有限公司 | FRPP ultra-silent drain pipe |
| CN116003912B (en) * | 2023-02-10 | 2024-01-09 | 创合新材料科技江苏有限公司 | Special polypropylene reinforcing material for micro-crosslinked high-pressure-resistant water pump and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002183A (en) * | 2010-09-28 | 2011-04-06 | 南京乐金熊猫电器有限公司 | Polypropylene-modified sound insulation material and preparation method thereof |
| CN105694223A (en) * | 2016-03-30 | 2016-06-22 | 上海俊尓新材料有限公司 | Glass fiber reinforced polypropylene composite material and preparation method thereof |
| CN106987051A (en) * | 2017-04-28 | 2017-07-28 | 安徽科聚新材料有限公司 | Fiber glass reinforced polypropylene material and preparation method thereof |
-
2017
- 2017-10-19 CN CN201710980964.0A patent/CN107641255B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002183A (en) * | 2010-09-28 | 2011-04-06 | 南京乐金熊猫电器有限公司 | Polypropylene-modified sound insulation material and preparation method thereof |
| CN105694223A (en) * | 2016-03-30 | 2016-06-22 | 上海俊尓新材料有限公司 | Glass fiber reinforced polypropylene composite material and preparation method thereof |
| CN106987051A (en) * | 2017-04-28 | 2017-07-28 | 安徽科聚新材料有限公司 | Fiber glass reinforced polypropylene material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107641255A (en) | 2018-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107641255B (en) | Glass fiber reinforced polypropylene composite material and preparation method thereof | |
| CN102952336B (en) | Active basic magnesium sulfate whisker modified polypropylene composite material and preparation method thereof | |
| CN102181100B (en) | Glass fiber reinforced co-polypropylene composite material and preparation method of the Glass fiber reinforced co-polypropylene composite material | |
| CN105623097A (en) | Nanometer-material-compounded long-glass-fiber-reinforced polypropylene material and preparing method thereof | |
| CN104592753B (en) | Nano-cellulose reinforced and toughened nylon 66 composite material and preparation method thereof | |
| CN112048124B (en) | Glass fiber reinforced polypropylene material with low-floating-fiber surface and preparation method thereof | |
| WO2022110655A1 (en) | Conductive polypropylene composition and preparation method therefor | |
| CN105542310A (en) | PP resin composition, glass fiber reinforced PP resin and preparation method thereof | |
| CN107892772A (en) | A kind of lightweight that resist warping continuous glass-fiber reinforced polypropylene compound material and preparation method | |
| CN104910517A (en) | Bimodally-distributed glass fiber reinforced polypropylene composite material and preparation method thereof | |
| CN108264749A (en) | A kind of high good surface carbon fiber reinforced polycarbonate composite material of flowing and preparation method thereof | |
| CN111410789A (en) | Low-odor low-VOC glass fiber reinforced polypropylene composite material and preparation method thereof | |
| CN112778684B (en) | Talcum powder filled polypropylene material with high yield strain and low-temperature impact resistance and preparation method thereof | |
| CN102942790A (en) | High temperature-resistant high-strength polyphenylene sulfide-based reactively reinforced and toughened composite material | |
| CN102924807A (en) | Special thin-wall polypropylene composite for bumpers and preparation method thereof | |
| CN109486156B (en) | Flame-retardant extrusion-grade PC/ABS composite material | |
| CN106928544A (en) | A kind of cold-resistant high-impact long glass fiber-reinforced polypropylene proprietary material and preparation method thereof | |
| CN112552599A (en) | Low-odor low-VOC low-haze glass fiber reinforced polypropylene composite material and preparation method thereof | |
| CN108912514A (en) | Anti-floating fibre master batch, low floating fiber/glass fiber reinforced polypropylene compound material and preparation method thereof | |
| CN115109407A (en) | Fiber reinforced nylon composite material and preparation method thereof | |
| CN104693597A (en) | High-temperature-resistant and low-shrinkage polyarylester fiber master batch/polypropylene composite material and preparation method thereof | |
| CN110862684A (en) | POK/PPS composite material and preparation method thereof | |
| CN112662076B (en) | Polypropylene composite material and preparation method thereof | |
| CN103304886A (en) | Talcum powder master batch and preparation method thereof | |
| CN102924921A (en) | High comparative tracking index polyphenylene sulfide reinforced composite material and preparation process thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |