CN113292828A - Manufacturing method and production process of cold-resistant plastic material based on high-molecular polymer - Google Patents
Manufacturing method and production process of cold-resistant plastic material based on high-molecular polymer Download PDFInfo
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- CN113292828A CN113292828A CN202110740392.5A CN202110740392A CN113292828A CN 113292828 A CN113292828 A CN 113292828A CN 202110740392 A CN202110740392 A CN 202110740392A CN 113292828 A CN113292828 A CN 113292828A
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- cold
- molecular polymer
- plastic material
- extruder
- high molecular
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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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/005—Soil-conditioning by mixing with fibrous materials, filaments, open mesh or the like
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0084—Geogrids
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Organic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention relates to a manufacturing method and a production process of a high-molecular polymer cold-resistant plastic material. The low-temperature material solves various defects of easy fracture, increased brittleness and reduced elongation of the traditional plastic product under the low-temperature condition. The obtained finished product can be paved, filled, positioned and leveled, meets the use requirements of various permanent projects, has strong cold resistance, excellent flexibility and high-strength extrusion resistance, can still maintain the excellent performance of plastic products at the low temperature of minus 75 ℃, and is suitable for the requirements of construction in low-temperature areas.
Description
Technical Field
The invention relates to the technical field of high-molecular polymer cold-resistant plastic materials, in particular to a manufacturing method and a production process of a high-molecular polymer cold-resistant plastic material.
Background
In the construction of roadbeds, dams, slope protection and tie bars, retaining walls, soft soil foundations and other projects, when the stress of a soil body is large, accidents such as creep deformation, displacement, cracking, collapse and the like can be caused. In order to ensure the engineering quality, a reinforcement material is arranged in a soil body, and the friction action between the reinforcement material and the soil body is adopted at present to transmit the stress of the reinforcement material to the reinforcement material, so that the soil body is reinforced and strengthened, and the stability of the soil body is achieved.
The common reinforcing material is geogrid, which is made of high molecular polymer through extrusion, plate forming, punching and longitudinal and transverse stretching. The material has great tensile strength in the longitudinal direction and the transverse direction, and the structure can also provide a more effective ideal interlocking system for bearing and diffusing force in soil and is suitable for large-area permanently-loaded foundations.
However, the geogrids produced by the existing process have the problems of low tensile force, easy breakage, low tensile strength, difficulty in spreading and leveling after hardening and the like in cold regions due to the influence of cold weather.
Disclosure of Invention
In order to solve the technical problems, the invention provides a manufacturing method and a production process of a cold-resistant plastic material based on a high molecular polymer, and the technical scheme is as follows:
the material comprises raw materials and additives, wherein the raw materials comprise EVA, HDPE and PET, and the raw materials comprise the following components in percentage by weight:
the sum of the weight percentages of all the components is 100 percent.
Further, the material was compounded with 0.8% EVA, 30.2% HDPE, 68% PET and 1% additive as follows.
Further, the method comprises the following steps:
the method comprises the following steps: adding the raw materials and the additives into a hopper of a mixer according to a certain proportion to obtain a mixture;
step two: stirring the mixture for 3-5 minutes, and stopping stirring;
step three: sucking the mixture stirred in the step two into a bin of an extruder by using a sucking machine;
step four: heating the extruder to 150-200 deg.c, and plasticizing the mixture from granular solid to molten plastic.
Further, the production process using the method is as follows:
after the plastic solution is extruded by an extruder and filtered by a filtering device, the plastic solution is conveyed into a die, the plastic solution in the die is drawn, cooled, heated and shaped, and then is stretched, rolled or cut and rolled by a belt making machine to prepare a belt with a certain specification, and then an ultrasonic welding machine or an injection molding machine is used for preparing a finished product, wherein the finished product is a welded bidirectional geogrid or a geocell.
Further, the mixer is of a type TY-5000.
Furthermore, the extruder is a JS-180-30 twin-screw extruder, and a spiral feeding mechanism is arranged in the extruder and is automatically controlled according to the preset power and extrusion amount.
Further, the filtering device is made of HS-200.
Further, the additive is a plastic antifreeze.
The invention has the beneficial effects that: the invention relates to a manufacturing method and a production process of a high-molecular polymer cold-resistant plastic material. The low-temperature material solves various defects of easy fracture, increased brittleness and reduced elongation of the traditional plastic product under the low-temperature condition. The obtained finished product can be paved, filled, positioned and leveled, meets the use requirements of various permanent projects, has strong cold resistance, excellent flexibility and high-strength extrusion resistance, can still maintain the excellent performance of plastic products at the low temperature of minus 75 ℃, and is suitable for the requirements of construction in low-temperature areas.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
As shown in the figure, the invention relates to a manufacturing method and a production process of a cold-resistant plastic material with a high polymer, which comprises 0.8 percent of EVA (ethylene-vinyl acetate copolymer), 30.2 percent of HDPE (high density polyethylene), 68 percent of PET (polyethylene terephthalate) and 1 percent of plastic antifreezing agent, wherein the EVA, the HDPE, the 68 percent of PET and the plastic antifreezing agent are mixed according to the proportion relation, and the mixture is poured into a hopper of a full-automatic stirring and feeding machine (namely a mixer) and adopts the following types: TY-5000, wherein a stirring device is arranged in the TY-5000, the mixture is uniformly stirred, and stirring is stopped after 3-5 minutes; and (3) feeding the stirred mixture into a bin of an extruder by using a suction machine (the model is L-400), wherein the model of the extruder is as follows: JS-180-30, the inside of which is equipped with a spiral feeding mechanism, the spiral feeding is automatically controlled by the equipment according to the preset power and extrusion amount, the inside of the extruder is provided with six zones, each zone is provided with a heating device, the heating range is 150-200 ℃ under the action of the heating of the extruder and the friction force among the granules, namely the temperature of the six zones on the equipment is respectively: after heating at 170 deg.C, 180 deg.C, 183 deg.C, 181 deg.C, 182 deg.C and 175 deg.C for 90 minutes, the mixture is gradually plasticized from granular solid into plastic solution with consistent temperature and pressure.
And (3) manufacturing the plastic solution into a finished product through a production process, wherein the finished product is a welded bidirectional geogrid and a geocell. The preparation method specifically comprises the following steps:
firstly, a production process for welding a bidirectional geogrid comprises the following steps:
the plastic melt in the extruder is conveyed into a die of the extruder under extrusion pressure through a filtering device (the filtering device adopts the model number is hs-200 and is provided with a front filtering component, a rear filtering component, a filter cover and a flow guide channel) under the screw conveying and viscous dragging effects, and then the plastic melt is subjected to traction (specifically using mechanical traction), water cooling (the temperature is 20-30 ℃), secondary heating (the temperature is 180-185 ℃), re-cooling (the temperature is 20-30 ℃), and then a belt making machine (adopting a 2D-300 belt making machine) is stretched and wound to make a belt with certain specification (the belt can be lengthened or widened according to requirements). And (3) putting the prepared belt into an ultrasonic welding machine or an injection molding machine, and welding or injection molding the finished product of the welded bidirectional geogrid according to certain specifications (for example, the specifications are different from 50KN to 150 KN).
Secondly, a production process of the geocell comprises the following steps:
conveying a plastic melt in an extruder into a coat hanger type sheet die under the extrusion pressure of a filter device under the screw conveying and viscous dragging action of a screw, processing the plastic melt into a planar sheet extrudate through the die, moving along the rotating direction of a three-roll calender under the dragging action of the three-roll calender, cooling the inside of a roller of the three-roll calender (adopting an S-150 three-roll calender) by water (the temperature is 20-30 ℃), cooling and shaping the sheet, wherein the thickness is generally 1.5-2.2 mm, conveying the cooled sheet to a pressure punching machine under the action of a tractor to punch holes, transversely cutting the length at the same time, cutting the cut sheet, and welding qualified finished products in a full-automatic ultrasonic welding machine, the finished product is a geocell.
The finished product of the invention has the characteristics of cold resistance, flexibility (namely weak brittleness) and strong anti-extrusion force, and is further described as follows:
cold resistance: generally, the brittleness, compressive strength and tensile force of a common plastic grid begin to be reduced at 0 ℃, the indexes are reduced by about half at minus 7-8 ℃, and the plastic grid can be broken or layered and broken at minus 10 ℃; experiments show that the finished product of the invention can reach the temperature of-75 ℃, still keeps the performance unchanged and has cold resistance.
Brittleness: the elongation of the common plastic material is generally about 7-8% at room temperature (the temperature of the common room temperature is 20 +/-2 ℃), and under the same condition, the elongation of the finished product is about 15-18%, so that the integral brittleness is low, the extrusion resistance is high, the flexibility is good, and the finished product is easy to pave.
The invention relates to a manufacturing method and a production process of a high-molecular polymer cold-resistant plastic material. The low-temperature material solves various defects of easy fracture, increased brittleness and reduced elongation of the traditional plastic product under the low-temperature condition. The obtained finished product can be paved, filled, positioned and leveled, meets the use requirements of various permanent projects, has strong cold resistance, excellent flexibility and high-strength extrusion resistance, can still maintain the excellent performance of plastic products at the low temperature of minus 75 ℃, and is suitable for the requirements of construction in low-temperature areas.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.
Claims (8)
1. The cold-resistant plastic material based on the high molecular polymer is characterized by comprising raw materials and additives, wherein the raw materials comprise EVA, HDPE and PET, and the components are as follows in percentage by weight:
the sum of the weight percentages of all the components is 100 percent.
2. The cold-resistant high molecular polymer plastic material as claimed in claim 1, wherein the material comprises 0.8% of EVA, 30.2% of HDPE, 68% of PET and 1% of additives in the following ratio.
3. The method for preparing the cold-resistant plastic material based on the high molecular polymer as claimed in claim 1, which comprises the following steps:
the method comprises the following steps: adding the raw materials and the additives into a hopper of a mixer according to a certain proportion to obtain a mixture;
step two: stirring the mixture for 3-5 minutes, and stopping stirring;
step three: sucking the mixture stirred in the step two into a bin of an extruder by using a sucking machine;
step four: heating the extruder to 150-200 deg.c, and plasticizing the mixture from granular solid to molten plastic.
4. The method for preparing the cold-resistant plastic material based on the high molecular polymer as claimed in claim 3, wherein the production process by the method is as follows:
after the plastic solution is extruded by an extruder and filtered by a filtering device, the plastic solution is conveyed into a die, the plastic solution in the die is drawn, cooled, heated and shaped, and then is stretched, rolled or cut and rolled by a belt making machine to prepare a belt with a certain specification, and then an ultrasonic welding machine or an injection molding machine is used for preparing a finished product, wherein the finished product is a welded bidirectional geogrid or a geocell.
5. The method for preparing the cold-resistant plastic material based on high molecular polymer as claimed in claim 3, wherein the mixer is of type TY-5000.
6. The method for preparing the cold-resistant plastic material based on high molecular polymer as claimed in claim 3, wherein the extruder is a JS-180-30 twin-screw extruder, and a screw feeding mechanism is arranged in the extruder, and the extruder is automatically controlled according to the preset power and extrusion amount.
7. The method for preparing the cold-resistant plastic material based on high molecular polymer as claimed in claim 4, wherein the filtering device is HS-200.
8. The cold-resistant high molecular polymer plastic material as claimed in claim 1 or 2, wherein the additive is a plastic antifreeze.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110740392.5A CN113292828A (en) | 2021-06-30 | 2021-06-30 | Manufacturing method and production process of cold-resistant plastic material based on high-molecular polymer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110740392.5A CN113292828A (en) | 2021-06-30 | 2021-06-30 | Manufacturing method and production process of cold-resistant plastic material based on high-molecular polymer |
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| Publication Number | Publication Date |
|---|---|
| CN113292828A true CN113292828A (en) | 2021-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110740392.5A Pending CN113292828A (en) | 2021-06-30 | 2021-06-30 | Manufacturing method and production process of cold-resistant plastic material based on high-molecular polymer |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4892691A (en) * | 1987-07-03 | 1990-01-09 | Hermann Berstorff Maschinenbau Gmbh | Extrusion method and apparatus for producing a foamable mixture of plastics material |
| CN107418164A (en) * | 2017-07-28 | 2017-12-01 | 朱道峰 | A kind of PET/PE alloys sheet material and preparation method thereof |
| CN110468820A (en) * | 2019-08-20 | 2019-11-19 | 中铁二院工程集团有限责任公司 | High-intensitive unidirectional TGXG and preparation method |
-
2021
- 2021-06-30 CN CN202110740392.5A patent/CN113292828A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4892691A (en) * | 1987-07-03 | 1990-01-09 | Hermann Berstorff Maschinenbau Gmbh | Extrusion method and apparatus for producing a foamable mixture of plastics material |
| CN107418164A (en) * | 2017-07-28 | 2017-12-01 | 朱道峰 | A kind of PET/PE alloys sheet material and preparation method thereof |
| CN110468820A (en) * | 2019-08-20 | 2019-11-19 | 中铁二院工程集团有限责任公司 | High-intensitive unidirectional TGXG and preparation method |
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Application publication date: 20210824 |