CN118617787B - A high-strength injection-molded geogrid and its manufacturing process - Google Patents
A high-strength injection-molded geogrid and its manufacturing process Download PDFInfo
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- CN118617787B CN118617787B CN202410653574.2A CN202410653574A CN118617787B CN 118617787 B CN118617787 B CN 118617787B CN 202410653574 A CN202410653574 A CN 202410653574A CN 118617787 B CN118617787 B CN 118617787B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 39
- 229920000098 polyolefin Polymers 0.000 claims abstract description 30
- 238000001746 injection moulding Methods 0.000 claims abstract description 27
- 239000002131 composite material Substances 0.000 claims abstract description 17
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000011247 coating layer Substances 0.000 claims abstract description 9
- 238000001125 extrusion Methods 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims abstract description 7
- 210000001161 mammalian embryo Anatomy 0.000 claims description 44
- 238000001816 cooling Methods 0.000 claims description 24
- 238000007493 shaping process Methods 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000004049 embossing Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 4
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000003963 antioxidant agent Substances 0.000 claims description 3
- 230000003078 antioxidant effect Effects 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- 229920001910 maleic anhydride grafted polyolefin Polymers 0.000 claims description 3
- 239000003607 modifier Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000012778 molding material Substances 0.000 claims description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 40
- 229920000139 polyethylene terephthalate Polymers 0.000 description 40
- 238000005253 cladding Methods 0.000 description 10
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920005594 polymer fiber Polymers 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
-
- 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
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14467—Joining articles or parts of a single article
-
- 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
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
-
- 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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/023—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets
- B29C55/026—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets of preformed plates or sheets coated with a solution, a dispersion or a melt of thermoplastic material
-
- 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
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
- B29C59/046—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts for layered or coated substantially flat surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D28/00—Producing nets or the like, e.g. meshes, lattices
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- Mechanical Engineering (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Dispersion Chemistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
本发明提出了一种高强度注塑土工格栅，由若干横纵交错的格栅条带搭接而成，格栅条带包括PET胚带以及包覆在PET胚带外表面的包覆层，包覆层为聚烯烃/PET共混改性料；本发明还提出了一种高强度注塑土工格栅的制造工艺，一台单螺杆挤出机挤出PET材料，另一台双螺杆挤出机挤出聚烯烃/PET共混改性料，两台挤出机分别将料送进双层共挤复合模头，挤出聚烯烃/PET共混改性料包覆PET的复合型胚带。改用PET材质大大提高了土工格栅带的强度，采用聚烯烃/PET共混改性生产包覆料，使包覆料中聚烯烃与PET能很好相融，由于包覆料中有PET组分，使包覆层与PET在后续拉伸过程中更好的结合不出现分层拉伸的情况，提高条带与注塑节点的相容性。
The present invention proposes a high-strength injection-molded geogrid, which is formed by overlapping a number of grid strips that are staggered horizontally and vertically. The grid strips include a PET embryonic strip and a coating layer coated on the outer surface of the PET embryonic strip, and the coating layer is a polyolefin/PET blended modified material. The present invention also proposes a manufacturing process for a high-strength injection-molded geogrid, wherein a single-screw extruder extrude PET material, and another twin-screw extruder extrude polyolefin/PET blended modified material. The two extruders respectively feed the materials into a double-layer co-extrusion composite die head to extrude a composite embryonic strip of polyolefin/PET blended modified material coated with PET. The use of PET material greatly improves the strength of the geogrid belt, and the use of polyolefin/PET blended modified material to produce the coating material allows the polyolefin and PET in the coating material to be well fused. Since the coating material contains PET components, the coating layer and PET are better combined in the subsequent stretching process without the occurrence of stratified stretching, thereby improving the compatibility of the strips and the injection molding nodes.
Description
Technical Field
The invention belongs to the technical field of production and processing of geogrids, and particularly relates to a high-strength injection molding geogrid and a manufacturing process thereof.
Background
Geogrid is a geosynthetic material, and is a net-like structure made of high-strength polymer fibers by processes such as stretching, injection molding, and the like. The reinforced concrete can be used in the projects of soil reinforcement, soil reinforcement and the like to improve the tensile strength and stability of the soil.
The prior injection molding geogrid connects criss-cross PP belts in an injection molding mode, is limited by the strength of the PP belts, and has the strength of about 100 KN/M. Therefore, to increase the strength of the geogrid, only stronger materials can be used instead of PP tapes. The PET has low price and high strength, and the strength of the PET belt with the same sectional area is more than three times of that of the PP belt, so the PET belt is a very good PP belt substitute.
However, due to the extrusion processing characteristics of PET, it is not easy to produce a tape that meets the width and thickness requirements of the injection molded grid, and the PET tape has too poor compatibility with the injection molded nodes, and the tape can be easily pulled out from the injection molded nodes.
Disclosure of Invention
Aiming at the defects pointed out in the background art, the invention aims to provide a high-strength injection molding geogrid and a manufacturing process thereof, which solve the problems of separation of injection molding nodes and incompatibility of belt bodies.
To achieve the above object, one of the technical solutions of the present invention is:
The utility model provides a high strength geogrid of moulding plastics, geogrid is formed by the overlap joint of a plurality of horizontal and vertical crisscross grid strips, the grid strip includes PET embryo area and cladding in the cladding of PET embryo area surface, the cladding is polyolefin/PET blending modification material.
Further, the polyolefin/PET blending modifier comprises 20-26% of PET, 50.5% -67.8% of polyolefin, 0.2-0.5% of antioxidant, 8-15% of maleic anhydride grafted polyolefin and 4-8% of carbon black master batch.
Further, the cladding layer has a cladding thickness of 0.2-0.5mm, the total thickness of the grid strips is 2.0-2.5mm, and the total width of the grid strips is 22.0-23.0m.
In order to achieve the above object, a second technical scheme of the present invention is as follows:
A process for manufacturing a high-strength injection molded geogrid, comprising the steps of:
step 1, drying raw materials, and drying PET;
Step 2, extruding and coating, namely extruding and molding the grid strips by adopting two extruders, extruding PET materials by adopting a single-screw extruder, extruding polyolefin/PET blending modified materials by adopting another double-screw extruder, respectively feeding the materials into a double-layer co-extrusion composite die head by adopting the two extruders, and extruding a composite embryo belt of the PET coated by the polyolefin/PET blending modified materials, wherein the coating thickness of the composite embryo belt is 1-2mm, the total thickness of the composite embryo belt is 5-8mm, and the total width of the composite embryo belt is 60-80mm;
Step 3, shaping the embryo belt, namely cooling and shaping the embryo belt in a cooling water tank after extrusion of the embryo belt is completed;
Step 4, carrying out primary traction on the blank belt, carrying out traction and stretching on the shaped blank belt by a primary stretcher, wherein the primary stretcher is provided with a preheating unit consisting of a plurality of preheating rollers, the preheating unit is connected with a mold temperature machine, and the medium is heat conducting oil;
Step 5, heating a blank belt baking oven, namely heating the blank belt subjected to primary traction and preheating, wherein the length of the baking oven is 4-6m;
Step 6, secondary traction is carried out on the embryo belt, the embryo belt heated by the oven is subjected to secondary traction and stretching by utilizing secondary stretching equipment, and a plurality of steel rollers are arranged on the secondary stretching equipment;
step 7, quickly preheating and shaping, namely quickly heat-shaping the embryo belt after the secondary traction and stretching by using another oven, wherein the length of the oven is 4-6m, and a plurality of fans for supplying air are additionally arranged in the oven;
step 8, embossing, namely embossing the surface of the preheated and shaped embryo belt to improve the friction force between the belt body and the soil body;
step 9, traction cooling, namely stretching, cooling and shaping the pricked embryo belt by using cooling traction equipment to form a grating strip, wherein the cooling traction equipment is provided with a plurality of cooling rollers, and all the cooling rollers are connected to a constant temperature control station to control the temperature of the cooling rollers;
And 10, injection molding, namely conveying the manufactured grid strips to an injection molding working section, and performing injection molding on staggered nodes of the grid strips by using an injection molding machine to finally form the geogrid.
Further, in the step 1, the PET is dried at a temperature of 150-180 ℃ for 6-8 hours.
Further, in the step 2, the working temperature of the single screw extruder is 220-250 ℃, and the working temperature of the double screw extruder is 190-230 ℃.
Further, in the step 3, the length of the cooling water tank is 3m, and the water temperature is not higher than 30 ℃.
Further, in the step 10, the node molding material is made of a polyolefin material.
After the technical scheme is adopted, the invention has the beneficial effects that:
the strength of the geogrid belt is greatly improved by changing the PET material, the polyolefin/PET blending modification is adopted to produce the cladding material, so that the polyolefin and the PET in the cladding material can be well fused, and the PET component is arranged in the cladding material, so that the cladding layer and the PET are better combined in the subsequent stretching process without layering stretching, and the compatibility of the belt and the injection molding node is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a process flow diagram of a baffle;
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are merely configured to illustrate the invention and are not configured to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention.
The directional terms appearing in the following description are those directions shown in the drawings and do not limit the specific structure of the invention. In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted" and "connected" are to be construed broadly, and may be fixedly connected, detachably connected, integrally connected, directly connected, or indirectly connected, for example. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
The invention will be further described in detail below with reference to the attached drawings and specific examples to facilitate a clearer understanding of the invention.
The embodiment of the invention provides a high-strength injection molding geogrid, which is formed by overlapping a plurality of transversely and longitudinally staggered grid strips, wherein each grid strip comprises a PET embryo belt and a coating layer coated on the outer surface of the PET embryo belt, and the coating layer is made of polyolefin materials.
Because the performance difference between polyolefin and PET is large, the contact interface between the polyolefin coating layer and PET embryo belt has no compatibility, and the coating material and PET can be layered during stretching, so that qualified belt can not be produced. To solve this problem, the coating is produced by blending and modifying the polyolefin/PET. The polyolefin/PET blending modifier comprises 20-26% of PET, 50.5% -67.8% of polyolefin, 0.2-0.5% of antioxidant, 8-15% of maleic anhydride grafted polyolefin and 4-8% of carbon black master batch.
The strength of the geogrid belt is greatly improved by changing the PET material, and the coating material is produced by adopting polyolefin/PET blending modification, so that the polyolefin and PET embryo in the coating material can be well in phase. Because the coating material contains the PET component, the coating layer and PET are better combined in the subsequent stretching process, the layering stretching condition is avoided, and the compatibility of the strip and the injection molding node is improved.
Another embodiment of the present invention provides a process for manufacturing a high-strength injection molded geogrid, comprising the steps of:
step 1, drying raw materials, namely drying PET (polyethylene terephthalate) at a temperature of 150-180 ℃ for 6-8 hours;
Step 2, extruding and coating, namely extruding and molding the grid strips by adopting two extruders, wherein one single-screw extruder is used for extruding PET materials, the working temperature is 220-250 ℃, the other double-screw extruder is used for extruding polyolefin/PET blending modified materials, the working temperature is 190-230 ℃, the two extruders respectively feed the materials into a double-layer co-extrusion composite die head, the composite embryo belt of the PET is coated by the polyolefin/PET blending modified materials, the coating thickness of the composite embryo belt is 1-2mm, the total thickness of the composite embryo belt is 5-8mm, and the total width of the composite embryo belt is 60-80mm;
step 3, shaping the embryo belt, namely cooling and shaping the embryo belt in a cooling water tank after extrusion of the embryo belt is completed, wherein the length of the cooling water tank is 3m, and the water temperature is not higher than 30 ℃;
Step 4, carrying out primary traction on the blank belt, carrying out traction and stretching on the shaped blank belt by a primary stretcher, wherein the primary stretcher is provided with a preheating unit consisting of a plurality of preheating rollers, the preheating unit is connected with a mold temperature machine, and the medium is heat conducting oil;
Step 5, heating a blank belt baking oven, namely heating the blank belt subjected to primary traction and preheating, wherein the length of the baking oven is 4-6m;
Step 6, secondary traction is carried out on the embryo belt, the embryo belt heated by the oven is subjected to secondary traction and stretching by utilizing secondary stretching equipment, and a plurality of steel rollers are arranged on the secondary stretching equipment;
step 7, quickly preheating and shaping, namely quickly heat-shaping the embryo belt after the secondary traction and stretching by using another oven, wherein the length of the oven is 4-6m, and a plurality of fans for supplying air are additionally arranged in the oven;
step 8, embossing, namely embossing the surface of the preheated and shaped embryo belt to improve the friction force between the belt body and the soil body;
step 9, traction cooling, namely stretching, cooling and shaping the pricked embryo belt by using cooling traction equipment to form a grating strip, wherein the cooling traction equipment is provided with a plurality of cooling rollers, and all the cooling rollers are connected to a constant temperature control station to control the temperature of the cooling rollers;
And 10, injection molding, namely carrying out traction and stretching in the steps to finally form a grid strip with the cladding layer thickness of 0.2-0.5mm, the total thickness of 2.0-2.5mm and the total width of 22.0-23.0mm, conveying the manufactured grid strip to an injection molding section, and carrying out injection molding on staggered nodes of the grid strip by using an injection molding machine to obtain the geogrid grid, wherein the node injection molding adopts polyolefin materials.
In accordance with the above embodiments of the invention, these embodiments are not exhaustive of all details, nor are they intended to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various modifications as are suited to the particular use contemplated. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The manufacturing process of the high-strength injection molding geogrid is characterized by comprising the following steps of:
step 1, drying raw materials, and drying PET;
Step 2, extruding and coating, namely extruding and molding the grid strips by adopting two extruders, extruding PET materials by adopting a single-screw extruder, extruding polyolefin/PET blending modified materials by adopting another double-screw extruder, respectively feeding the materials into a double-layer co-extrusion composite die head by adopting the two extruders, and extruding a composite embryo belt of the PET coated by the polyolefin/PET blending modified materials, wherein the coating thickness of the composite embryo belt is 1-2mm, the total thickness of the composite embryo belt is 5-8mm, and the total width of the composite embryo belt is 60-80mm;
Step 3, shaping the embryo belt, namely cooling and shaping the embryo belt in a cooling water tank after extrusion of the embryo belt is completed;
Step 4, carrying out primary traction on the blank belt, carrying out traction and stretching on the shaped blank belt by a primary stretcher, wherein the primary stretcher is provided with a preheating unit consisting of a plurality of preheating rollers, the preheating unit is connected with a mold temperature machine, and the medium is heat conducting oil;
Step 5, heating a blank belt baking oven, namely heating the blank belt subjected to primary traction and preheating, wherein the length of the baking oven is 4-6m;
Step 6, secondary traction is carried out on the embryo belt, the embryo belt heated by the oven is subjected to secondary traction and stretching by utilizing secondary stretching equipment, and a plurality of steel rollers are arranged on the secondary stretching equipment;
step 7, quickly preheating and shaping, namely quickly heat-shaping the embryo belt after the secondary traction and stretching by using another oven, wherein the length of the oven is 4-6m, and a plurality of fans for supplying air are additionally arranged in the oven;
step 8, embossing, namely embossing the surface of the preheated and shaped embryo belt to improve the friction force between the belt body and the soil body;
step 9, traction cooling, namely stretching, cooling and shaping the pricked embryo belt by using cooling traction equipment to form a grating strip, wherein the cooling traction equipment is provided with a plurality of cooling rollers, and all the cooling rollers are connected to a constant temperature control station to control the temperature of the cooling rollers;
step 10, injection molding, namely conveying the manufactured grid strips to an injection molding working section, and performing injection molding on staggered nodes of the grid strips by using an injection molding machine to finally form the geogrid;
The geogrid is formed by overlapping a plurality of transversely and longitudinally staggered grid strips, the grid strips comprise PET embryo belts and coating layers coated on the outer surfaces of the PET embryo belts, and the coating layers are polyolefin/PET blending modified materials;
the polyolefin/PET blending modifier comprises 20-26% of PET, 50.5% -67.8% of polyolefin, 0.2-0.5% of antioxidant, 8-15% of maleic anhydride grafted polyolefin and 4-8% of carbon black master batch.
2. The process for manufacturing a high-strength injection molded geogrid according to claim 1, wherein in step 1, PET is dried at a temperature of 150 to 180 ℃ for 6 to 8 hours.
3. The process for manufacturing the high-strength injection molding geogrid according to claim 1, wherein in the step 2, the working temperature of the single screw extruder is 220-250 ℃, and the working temperature of the double screw extruder is 190-230 ℃.
4. The process for manufacturing the high-strength injection-molded geogrid according to claim 1, wherein in the step 3, the length of the cooling water tank is 3m, and the water temperature is not higher than 30 ℃.
5. The process for manufacturing a high-strength injection molded geogrid according to claim 1, wherein in step 10, the node injection molding material is a polyolefin material.
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| CN118617787B true CN118617787B (en) | 2025-04-01 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103802296A (en) * | 2013-12-30 | 2014-05-21 | 青岛旭域土工材料股份有限公司 | Method for producing geogrids through co-extrusion |
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| CN102529103B (en) * | 2011-12-21 | 2015-07-29 | 泰安路德工程材料有限公司 | Polyester (PET) Plastics Geogrids and manufacture method thereof |
| CN108481764A (en) * | 2018-05-21 | 2018-09-04 | 泰安市中研复合材料科技有限公司 | A kind of method and device preparing grating band using composite fibre |
| CN109537564A (en) * | 2018-11-26 | 2019-03-29 | 泸州胜扬新材料有限公司 | A kind of high-strength polyester TGXG and preparation method thereof |
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| CN103802296A (en) * | 2013-12-30 | 2014-05-21 | 青岛旭域土工材料股份有限公司 | Method for producing geogrids through co-extrusion |
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| CN118617787A (en) | 2024-09-10 |
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