CN112321198A - Degradable stone-plastic polypropylene material and preparation method thereof - Google Patents
Degradable stone-plastic polypropylene material and preparation method thereof Download PDFInfo
- Publication number
- CN112321198A CN112321198A CN202011219256.3A CN202011219256A CN112321198A CN 112321198 A CN112321198 A CN 112321198A CN 202011219256 A CN202011219256 A CN 202011219256A CN 112321198 A CN112321198 A CN 112321198A
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- Prior art keywords
- polypropylene
- degradable
- temperature
- polypropylene material
- parts
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/045—Polyalkenes
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/26—Carbonates
- C04B14/28—Carbonates of calcium
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a degradable stone-plastic polypropylene material and a preparation method thereof; the degradable stone-plastic polypropylene material comprises the following components in parts by mass: 50-60 parts of limestone powder, 15-20 parts of co-polypropylene, 10-15 parts of homo-polypropylene and 0-5 parts of modifier. The invention provides a stone-plastic polypropylene material taking limestone powder as a main raw material, which has the characteristics of degradability and low cost, and the effective combination of the co-polypropylene, the homo-polypropylene and the limestone powder can greatly reduce the production cost and realize the degradability on the basis of ensuring the characteristics of the polypropylene.
Description
Technical Field
The invention relates to the technical field of plates, in particular to a degradable stone-plastic polypropylene material and a preparation method thereof.
Background
Polypropylene (PP) is a semi-crystalline thermoplastic. Has high impact resistance, high mechanical property and high resistance to corrosion of various organic solvents and acid and alkali. It is widely used in industry and is one of the common polymer materials.
A large number of waste plastic products, including polypropylene sheets, are found throughout a variety of public places. They come from nature, are manufactured by human beings, but are not easily absorbed by nature, thereby affecting the ecological environment of the nature. From the perspective of saving resources, the main source of the plastic product is the exhausted petroleum resource, and the plastic product should be recovered as much as possible, but the production cost of the recycling at the present stage is far higher than the direct production cost, which is difficult to achieve under the current market economic condition. There is a need to provide a degradable plastic which can be completely decomposed into small molecular substances in a certain time after use, and thus can be recycled by nature.
Therefore, the material which is low in cost, stable in mechanical property, environment-friendly and degradable is applied to the plate, and an important research direction is provided.
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems occurring in the prior art.
The invention provides a degradable stone-plastic polypropylene material, which comprises the following components in parts by mass:
preferably, the coating comprises the following components in parts by mass:
preferably, the modifier is a stearate and/or a resin.
Further, the stearate comprises barium stearate/zinc stearate.
Further, the resin is one or more of polyethylene wax, oxidized polyethylene wax, ethylene-octene copolymer, SEPS elastic soft rubber and SEBS elastic soft rubber.
Preferably, the particle size of the limestone powder is 400-2500 meshes.
In a second aspect, the invention further provides a preparation method of the degradable stone-plastic polypropylene material, which specifically comprises the following steps:
s1: weighing the following raw materials: sequentially mixing limestone powder, co-polypropylene, homo-polypropylene and a modifier to obtain a mixture;
s2: and (3) granulation: feeding the mixed material into a screw extruder, and melting and mixing to obtain granular materials;
s3: the pellets are placed in an extruder and extruded and calendered into sheet.
Preferably, in step S1, a mixer is provided, the mixing time is 20 to 25 minutes, and the rotating speed of the mixer is 80 to 100 r/min.
Preferably, the temperature of the melt-kneading in step S2 is 180-190 ℃.
Preferably, the extrusion section temperature of the screw extruder in the step S2 is: the temperature of the first section is 180-190 ℃, the temperature of the second section is 190-195 ℃, and the temperature of the third section is 195-200 ℃.
By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:
(1) the invention takes limestone powder as the main raw material, and has the characteristics of degradability and low cost, and the effective combination of the co-polypropylene, the homo-polypropylene and the limestone powder can greatly reduce the production cost and realize the degradability on the basis of ensuring the characteristics of the polypropylene; (2) the formulation of ingredients including the co-polypropylene improves optical properties, increases clarity and reduces haze.
Detailed Description
The invention takes limestone powder and polypropylene as main components, wherein the inorganic mineral powder has the characteristics of degradability and low cost; the effective combination of the polypropylene and the calcium carbonate can greatly reduce the production cost of the material on the basis of ensuring the property of the polypropylene.
The polypropylene random copolymer is also a kind of polypropylene, and the basic structure of its high molecular chain is modified by adding different kinds of monomer molecules. Compared to PP homopolymer, random copolymers improve optical properties (increased transparency and reduced haze), improve impact resistance, increase flexibility, lower melt temperature, and thus lower heat-fusion temperature; while being substantially the same as the homopolymer in terms of chemical stability, water vapor barrier properties and organoleptic properties (low odor and taste). The product can be applied to the fields of blow molding, injection molding, extrusion molding, film and sheet extrusion processing, and can be used as a household tap water pipe, a food packaging material, a medical packaging material and a daily consumer product.
The invention provides a degradable stone-plastic polypropylene material which comprises the following components in parts by mass:
preferably, the coating comprises the following components in parts by mass:
the present invention will be described in detail and specifically with reference to the following examples to facilitate better understanding of the present invention, but the following examples do not limit the scope of the present invention.
Example 1
The embodiment provides a preparation method of a degradable stone-plastic polypropylene material, which specifically comprises the following steps:
s1: weighing 60 parts of limestone powder, 20 parts of co-polypropylene (K8003) and 15 parts of homo-polypropylene (T03), wherein the modifier comprises 3 parts of polyethylene wax, 0.5 part of barium stearate and 1.5 parts of zinc stearate, and sequentially mixing the limestone powder, the co-polypropylene, the homo-polypropylene and the modifier in a mixer for 20-25 minutes at the rotating speed of 80-100r/min to obtain a mixture;
s2: and (3) granulation: feeding the mixed material into a screw extruder, melting and mixing at the temperature of 180-190 ℃ to obtain granular material, wherein the extrusion sectional temperature is as follows: the temperature of the first section is 180-190 ℃, the temperature of the second section is 190-195 ℃ and the temperature of the third section is 195-200 ℃ to obtain granular materials;
s3: the pellets are placed in an extruder and extruded and calendered into sheet.
Example 2
The embodiment provides a preparation method of a degradable stone-plastic polypropylene material, which specifically comprises the following steps:
s1: weighing 60 parts of limestone powder, 20 parts of co-polypropylene (K8003), 15 parts of homo-polypropylene (T03) and 5 parts of modifier, wherein the modifier comprises 2.5 parts of polyethylene wax, 1 part of barium stearate and 1.5 parts of zinc stearate, and sequentially placing the limestone powder, the co-polypropylene, the homo-polypropylene and the modifier into a mixer for mixing for 20-25 minutes at the rotating speed of 80-100r/min to obtain a mixture;
s2: and (3) granulation: feeding the mixed material into a screw extruder, melting and mixing at the temperature of 180-190 ℃ to obtain granular material, wherein the extrusion sectional temperature is as follows: the temperature of the first section is 180-190 ℃, the temperature of the second section is 190-195 ℃ and the temperature of the third section is 195-200 ℃ to obtain granular materials;
s3: the pellets are placed in an extruder and extruded and calendered into sheet.
Example 3
The embodiment provides a preparation method of a degradable stone-plastic polypropylene material, which specifically comprises the following steps:
s1: weighing 50 parts of limestone powder, 15 parts of co-polypropylene (K8003), 15 parts of homo-polypropylene (T03) and 5 parts of modifier, wherein the modifier comprises 2.5 parts of polyethylene wax, 1 part of barium stearate and 1.5 parts of zinc stearate, and sequentially placing the limestone powder, the co-polypropylene, the homo-polypropylene and the modifier into a mixer for mixing for 20-25 minutes at the rotating speed of 80-100r/min to obtain a mixture;
s2: and (3) granulation: feeding the mixed material into a screw extruder, melting and mixing at the temperature of 180-190 ℃ to obtain granular material, wherein the extrusion sectional temperature is as follows: the temperature of the first section is 180-190 ℃, the temperature of the second section is 190-195 ℃ and the temperature of the third section is 195-200 ℃ to obtain granular materials;
s3: the pellets are placed in an extruder and extruded and calendered into sheet.
Mechanical Property test example
The Shanghai petrochemical polypropylene M800E was purchased as a comparative example. The polypropylene M800E was prepared into a material having the same size, shape and thickness as the degradable polypropylene stone material prepared in examples 1-3.
Mechanical property tests were performed on examples 1-3 and comparative examples, in which: measuring the thickness of the finished product according to GB/T6672-2001; measuring the tensile strength of a finished product according to GB/T1040-2006; the impact strength was measured in accordance with GB/T1843-2008 (test condition 23 ℃ C.), and the obtained measurement data are shown in Table 1.
Table 1 examples 1-3 mechanical property test results
| Sample (I) | Tensile strength/MPa | Impact strength J/m |
| Example 1 | 30 | 51 |
| Example 2 | 27 | 46 |
| Example 3 | 26 | 40 |
| Comparative example | 26 | 35 |
UV light degradation test example
The photodegradation test of the degradable stone-plastic polypropylene materials prepared in examples 1 to 3 was carried out by the following specific test methods:
the test method comprises the following steps: ASTM D3826-18& ASTM D5208-15 Cycle A
Lamp tube type: UVA-340
Illumination: BPT at 50 ℃ for 20h, 0.89W/(m)2·nm)@340nm
Condensation: BPT at 40 ℃ for 4h
Exposure time: 336h
Table 2 examples 1-3UV light degradation test results
| Film samples | After testing |
| Example 1 | Visible fracture appeared |
| Example 2 | Visible fracture appeared |
| Example 3 | Visible fracture appeared |
The embodiments of the present invention have been described in detail, but the embodiments are merely examples, and the present invention is not limited to the embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.
Claims (10)
1. The degradable stone-plastic polypropylene material comprises the following components in parts by mass:
2. the degradable stone-plastic polypropylene material of claim 1, which comprises the following components in parts by mass:
3. the degradable polypropylene material of claim 1, wherein the modifier is stearate and/or resin.
4. The degradable polypropylene material of claim 3, wherein the stearate comprises barium/zinc stearate.
5. The degradable stone-plastic polypropylene material of claim 3, wherein the resin is one or more of polyethylene wax, oxidized polyethylene wax, ethylene-octene copolymer, SEPS elastic soft rubber and SEBS elastic soft rubber.
6. The degradable stone-plastic polypropylene material as claimed in claim 1, wherein the particle size of the limestone powder is 400-2500 mesh.
7. The preparation method of the degradable stone-plastic polypropylene material according to any one of claims 1 to 6, which comprises the following steps:
s1: weighing the following raw materials: sequentially mixing limestone powder, co-polypropylene, homo-polypropylene and a modifier to obtain a mixture;
s2: and (3) granulation: feeding the mixed material into a screw extruder, and melting and mixing to obtain granular materials;
s3: the pellets are placed in an extruder and extruded and calendered into sheet.
8. The method of claim 7, wherein step S1 provides a mixer, the mixing time is 20-25 minutes, and the mixer speed is 80-100 r/min.
9. The preparation method as claimed in claim 7, wherein the temperature of the melt-kneading in the step S2 is 180-190 ℃.
10. The preparation method of claim 7, wherein the screw extruder extrusion section temperature in the step S2 is: the temperature of the first section is 180-190 ℃, the temperature of the second section is 190-195 ℃, and the temperature of the third section is 195-200 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011219256.3A CN112321198A (en) | 2020-11-04 | 2020-11-04 | Degradable stone-plastic polypropylene material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011219256.3A CN112321198A (en) | 2020-11-04 | 2020-11-04 | Degradable stone-plastic polypropylene material and preparation method thereof |
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| CN112321198A true CN112321198A (en) | 2021-02-05 |
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| CN202011219256.3A Pending CN112321198A (en) | 2020-11-04 | 2020-11-04 | Degradable stone-plastic polypropylene material and preparation method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102766300A (en) * | 2012-08-06 | 2012-11-07 | 昆明钢铁控股有限公司 | Stone paperboard for file folder and preparation method thereof |
| CN108517076A (en) * | 2018-04-24 | 2018-09-11 | 武汉工程大学 | A kind of degradable plastic uptake sheet material and preparation method thereof |
-
2020
- 2020-11-04 CN CN202011219256.3A patent/CN112321198A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102766300A (en) * | 2012-08-06 | 2012-11-07 | 昆明钢铁控股有限公司 | Stone paperboard for file folder and preparation method thereof |
| CN108517076A (en) * | 2018-04-24 | 2018-09-11 | 武汉工程大学 | A kind of degradable plastic uptake sheet material and preparation method thereof |
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Application publication date: 20210205 |