CN111548642A - Thermoplastic rubber composite material containing natural fiber powder and preparation method thereof - Google Patents
Thermoplastic rubber composite material containing natural fiber powder and preparation method thereof Download PDFInfo
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- CN111548642A CN111548642A CN202010430354.5A CN202010430354A CN111548642A CN 111548642 A CN111548642 A CN 111548642A CN 202010430354 A CN202010430354 A CN 202010430354A CN 111548642 A CN111548642 A CN 111548642A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
- C08L2207/24—Recycled plastic recycling of old tyres and caoutchouc and addition of caoutchouc particles
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
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- Injection Moulding Of Plastics Or The Like (AREA)
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Abstract
The invention discloses a thermoplastic rubber composite material containing natural fiber powder, which comprises the following raw materials in percentage by mass: 40 to 60 percent of thermoplastic rubber, 20 to 51 percent of natural fiber powder, 3 to 8 percent of fluxing agent, 0.5 to 1.5 percent of flowing agent and 0.1 to 0.5 percent of vulcanizing agent. The invention adopts the thermoplastic rubber composite material containing natural fiber powder and the preparation method thereof, thereby improving the elastic strength of the product and increasing the weather resistance and the injection flow property.
Description
Technical Field
The invention relates to the technical field of natural fiber powder composite materials, in particular to a thermoplastic rubber composite material containing natural fiber powder and a preparation method thereof.
Background
The natural fiber powder rubber composite material consisting of the straw fiber, the wheat straw fiber, the coffee shell, the coffee grounds, the wood fiber, the bamboo fiber and the thermoplastic rubber is a novel composite rubber material which is emerging at present and has wide development. The composite material has the advantages of artificial rubber and natural fiber, and has the advantages of reproducibility, low manufacturing cost and attractive appearance, so that the natural fiber powder rubber composite material is widely applied to the fields of automobiles, electric tools, ships and daily necessities. However, the natural fiber powder and the artificial rubber have the problems of great physical property difference, poor associativity, poor product processing flowability and low surface smoothness.
Disclosure of Invention
The invention aims to provide a thermoplastic rubber composite material containing natural fiber powder and a preparation method thereof, which improve the elastic strength of a product and increase the weather resistance and the injection flow property.
In order to achieve the purpose, the invention provides a thermoplastic rubber composite material containing natural fiber powder, which comprises the following raw materials in percentage by mass: 40 to 60 percent of thermoplastic rubber, 20 to 51 percent of natural fiber powder, 3 to 8 percent of fluxing agent, 0.5 to 1.5 percent of flowing agent and 0.1 to 0.5 percent of vulcanizing agent.
Preferably, the thermoplastic rubber composite material containing natural fiber powder comprises the following raw materials in percentage by mass: 41 to 59 percent of thermoplastic rubber, 21 to 50 percent of natural fiber powder, 3.1 to 7.9 percent of fluxing agent, 0.55 to 1.45 percent of flowing agent and 0.15 to 0.45 percent of vulcanizing agent.
Preferably, the thermoplastic rubber has a melt flow index of 3.0 to 15.0g/10 min.
Preferably, the thermoplastic rubber is injection molded grade TPR, TPU or recycled TPR, TPU stock.
Preferably, the fluxing agent is an ethylene-methacrylic acid copolymer.
Preferably, the particle size of the natural fiber powder is 60-150 meshes, and the natural fiber powder is derived from straw fiber, wheat straw fiber, coffee shell, coffee grounds, wood fiber or bamboo fiber.
Preferably, the flow agent is a saturated fatty acid ester.
Preferably, the vulcanizing agent is a vulcanizing agent DTDM.
A preparation method of a thermoplastic rubber composite material containing natural fiber powder comprises the following steps:
s1, grinding and drying: grinding straw fiber, wheat straw fiber, coffee shells, coffee grounds, wood fiber or bamboo fiber or recycled and classified cleaned waste fiber products into natural fiber powder of 60-150 meshes, putting the ground natural fiber powder into a dryer, and drying at 75-85 ℃ for 3-4 hours to ensure that the water content of the natural fiber powder is lower than 5%;
s2, mixing: preparing materials according to mass percent, and mixing the prepared thermoplastic rubber, natural fiber powder, a fluxing agent, a flow agent and a vulcanizing agent in a mixer at a mixing temperature of not more than 95 ℃ for 10-30 minutes;
s3, granulating: putting the fully mixed mixture into a granulator, molding by the granulator, and shearing into universal particles to obtain a blend, wherein the granulation temperature is 150-;
s4, molding: and (3) putting the particles into an extruder or an injection molding machine for molding to obtain the thermoplastic rubber composite material containing the natural fiber powder.
Preferably, in step S4, before the forming, the particles are placed into a dryer for drying treatment, wherein the drying temperature is 80-95 ℃, and the drying time is 1.5-3 hours.
Therefore, the thermoplastic rubber composite material containing natural fiber powder and the preparation method thereof have the following beneficial effects:
(1) the thermoplastic rubber used in the composite material can be the original raw material of the thermoplastic rubber, and can also be the re-material of the recycled waste thermoplastic rubber; the natural fiber used by the composite material can be common straw fiber, wheat straw fiber, coffee shell, coffee grounds, wood fiber or bamboo fiber, and can also be waste fiber of products made of the straw fiber, the wheat straw fiber, the coffee shell, the wood fiber or the bamboo fiber, so that the reutilization of thermoplastic rubber plastic products can be improved, the utilization rate of natural materials is improved, the waste of resources is avoided, and the environment is protected.
(2) Firstly, the compatibility of natural fiber and thermoplastic rubber is treated by adopting a fusing agent, so that the problems of poor compatibility and poor elastic strength of the fiber and the thermoplastic rubber are solved; secondly, the problem of poor flowability of the natural fiber powder thermoplastic rubber composite material is solved by adopting a flowing agent such as zinc stearate; thirdly, the problems of unsatisfactory weather resistance and short service life of the natural fiber powder thermoplastic rubber composite material are solved by adopting a vulcanizing agent DTDM, and the problems of poor elastic strength, long processing time, no ultraviolet resistance, short life and the like of a natural fiber and thermoplastic rubber composite material molded product are solved.
The technical solution of the present invention is further described in detail by the following examples.
Detailed Description
The embodiments of the present invention will be further explained below.
The invention provides a thermoplastic rubber composite material containing natural fiber powder, which comprises the following raw materials in percentage by mass: 40 to 60 percent of thermoplastic rubber, 20 to 51 percent of natural fiber powder, 3 to 8 percent of fluxing agent, 0.5 to 1.5 percent of flowing agent and 0.1 to 0.5 percent of vulcanizing agent.
Further, the thermoplastic rubber composite material containing the natural fiber powder comprises the following raw materials in percentage by mass: 41 to 59 percent of thermoplastic rubber, 21 to 50 percent of natural fiber powder, 3.1 to 7.9 percent of fluxing agent, 0.55 to 1.45 percent of flowing agent and 0.15 to 0.45 percent of vulcanizing agent. The thermoplastic rubber has a melt flow index of 3.0 to 15.0g/10 min. The thermoplastic rubber is injection molding grade TPR, TPU or regenerated TPR and TPU material. The fluxing agent is an ethylene-methacrylic acid copolymer. The natural fiber powder has a particle size of 60-150 meshes, and is prepared from rice straw fiber, wheat straw fiber, coffee shell, coffee grounds, wood fiber or bamboo fiber. The flowing agent is saturated fatty acid ester. The vulcanizing agent is vulcanizing agent DTDM.
A preparation method of a thermoplastic rubber composite material containing natural fiber powder comprises the following steps:
s1, grinding and drying: grinding straw fiber, wheat straw fiber, coffee shells, coffee grounds, wood fiber or bamboo fiber or recycled and classified cleaned waste fiber products into natural fiber powder of 60-150 meshes, putting the ground natural fiber powder into a dryer, and drying at 75-85 ℃ for 3-4 hours to ensure that the water content of the natural fiber powder is lower than 5%;
s2, mixing: preparing materials according to mass percent, and mixing the prepared thermoplastic rubber, natural fiber powder, a fluxing agent, a flow agent and a vulcanizing agent in a mixer at a mixing temperature of not more than 95 ℃ for 10-30 minutes;
s3, granulating: putting the fully mixed mixture into a granulator, molding by the granulator, and shearing into universal particles to obtain a blend, wherein the granulation temperature is 150-;
s4, molding: before forming, the particles are put into a dryer for drying treatment at the drying temperature of 80-95 ℃ for 1.5-3 hours, and then the particles are put into an extruder or an injection molding machine for forming to obtain the thermoplastic rubber composite material containing natural fiber powder.
Examples
A thermoplastic rubber composite material containing natural fiber powder comprises the following raw materials in percentage by mass: TPR 62.8%, coffee shell 30%, ethylene-methacrylic acid copolymer 6%, saturated fatty acid ester 1.0%, vulcanizing agent DTDM 0.2%. The TPR has a melt flow index of 5.0g/10 min. The particle size of the coffee shell is 90 mesh.
The preparation method of the thermoplastic rubber composite material containing the natural fiber powder comprises the following steps:
s1, grinding and drying: grinding coffee shells into 90-mesh fiber powder, putting the ground fiber powder into a dryer, and drying at 80 ℃ for 3 hours to ensure that the water content of the fiber powder is lower than 5%;
s2, mixing: preparing materials according to mass percent, and putting the prepared thermoplastic rubber (TPR), coffee shells, ethylene-methacrylic acid copolymer, saturated fatty acid ester and vulcanizing agent DTDM into a mixer for mixing at 90 ℃ for 12 minutes;
s3, granulating: putting the fully mixed mixture into a granulator, forming the mixture by the granulator, and shearing the mixture into universal particles to obtain a blend material, wherein the granulation temperature is 180 ℃;
s4, molding: before forming, the particle material is put into a dryer for drying treatment, the drying temperature is 90 ℃, the drying time is 1.5 hours, and the particles are put into an extruder or an injection molding machine for forming.
The composite material product prepared by the method has the melt flow rate of 4.0g/10min, the tensile stress of 4.56MPa, the tensile strength of 32.0MPa and the elongation of 400 percent.
Therefore, the invention adopts the thermoplastic rubber composite material containing natural fiber powder and the preparation method thereof, thereby improving the elastic strength of the product and increasing the weather resistance and the injection flow property.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.
Claims (10)
1. The thermoplastic rubber composite material containing natural fiber powder is characterized by comprising the following raw materials in percentage by mass: 40 to 60 percent of thermoplastic rubber, 20 to 51 percent of natural fiber powder, 3 to 8 percent of fluxing agent, 0.5 to 1.5 percent of flowing agent and 0.1 to 0.5 percent of vulcanizing agent.
2. The natural fiber powder-containing thermoplastic rubber composite material as claimed in claim 1, which is characterized by comprising the following raw materials in percentage by mass: 41 to 59 percent of thermoplastic rubber, 21 to 50 percent of natural fiber powder, 3.1 to 7.9 percent of fluxing agent, 0.55 to 1.45 percent of flowing agent and 0.15 to 0.45 percent of vulcanizing agent.
3. The natural fiber powder-containing thermoplastic rubber composite material according to claim 1, wherein: the thermoplastic rubber has a melt flow index of 3.0 to 15.0g/10 min.
4. The natural fiber powder-containing thermoplastic rubber composite material according to claim 1, wherein: the thermoplastic rubber is injection molding TPR, TPU or regenerated TPR and TPU material.
5. The natural fiber powder-containing thermoplastic rubber composite material according to claim 1, wherein: the fluxing agent is an ethylene-methacrylic acid copolymer.
6. The natural fiber powder-containing thermoplastic rubber composite material according to claim 1, wherein: the particle size of the natural fiber powder is 60-150 meshes, and the natural fiber powder is from straw fiber, wheat straw fiber, coffee shell, coffee grounds, wood fiber or bamboo fiber.
7. The natural fiber powder-containing thermoplastic rubber composite material according to claim 1, wherein: the flowing agent is saturated fatty acid ester.
8. The natural fiber powder-containing thermoplastic rubber composite material according to claim 1, wherein: the vulcanizing agent is a vulcanizing agent DTDM.
9. A method for preparing the natural fiber powder-containing thermoplastic rubber composite material as set forth in any one of claims 1 to 8, comprising the steps of:
s1, grinding and drying: grinding straw fiber, wheat straw fiber, coffee shells, coffee grounds, wood fiber or bamboo fiber or recycled and classified cleaned waste fiber products into natural fiber powder of 60-150 meshes, putting the ground natural fiber powder into a dryer, and drying at 75-85 ℃ for 3-4 hours to ensure that the water content of the natural fiber powder is lower than 5%;
s2, mixing: preparing materials according to mass percent, and mixing the prepared thermoplastic rubber, natural fiber powder, a fluxing agent, a flow agent and a vulcanizing agent in a mixer at a mixing temperature of not more than 95 ℃ for 10-30 minutes;
s3, granulating: putting the fully mixed mixture into a granulator, molding by the granulator, and shearing into universal particles to obtain a blend, wherein the granulation temperature is 150-;
s4, molding: and (3) putting the particles into an extruder or an injection molding machine for molding to obtain the thermoplastic rubber composite material containing the natural fiber powder.
10. The method for preparing the thermoplastic rubber composite material containing natural fiber powder according to claim 9, wherein the method comprises the following steps: in step S4, before molding, the particles are dried in a dryer at a temperature of 80-95 ℃ for 1.5-3 hours.
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| CN202010430354.5A CN111548642A (en) | 2020-05-20 | 2020-05-20 | Thermoplastic rubber composite material containing natural fiber powder and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102086306A (en) * | 2010-12-03 | 2011-06-08 | 徐月明 | Macromolecular composite containing fibrous straw powder and preparation method thereof |
| CN104650452A (en) * | 2014-08-07 | 2015-05-27 | 柳州蓓蒂芬科技有限公司 | Preparation method of plant microfine fibers/rubber powder/polypropylene thermal stretch composite material |
| CN110172258A (en) * | 2019-05-30 | 2019-08-27 | 上海互见创意设计有限公司 | A kind of composite polyolefine material and preparation method thereof containing coffee grounds |
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2020
- 2020-05-20 CN CN202010430354.5A patent/CN111548642A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102086306A (en) * | 2010-12-03 | 2011-06-08 | 徐月明 | Macromolecular composite containing fibrous straw powder and preparation method thereof |
| CN104650452A (en) * | 2014-08-07 | 2015-05-27 | 柳州蓓蒂芬科技有限公司 | Preparation method of plant microfine fibers/rubber powder/polypropylene thermal stretch composite material |
| CN110172258A (en) * | 2019-05-30 | 2019-08-27 | 上海互见创意设计有限公司 | A kind of composite polyolefine material and preparation method thereof containing coffee grounds |
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Application publication date: 20200818 |
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