CN109895351B - Preparation method of high-barrier-property multilayer composite material - Google Patents
Preparation method of high-barrier-property multilayer composite material Download PDFInfo
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Abstract
The invention discloses a preparation method of a high-barrier multilayer composite material, which comprises the following steps: providing nylon 6, high density polyethylene pellets, EVOH pellets and ethylene propylene diene monomer rubber pellets; mixing nylon 6 and ethylene propylene diene monomer particles to obtain a first mixture; mixing the high-density polyethylene granules and the EVOH granules to obtain a second mixture; putting the first mixture into a first double-screw extruder for extrusion molding to obtain a first mixed melt; putting the second mixture into a second double-screw extruder for extrusion molding to obtain a second mixed melt; introducing the first mixed melt and the second mixed melt into a laminator, and calendering the laminated body at the outlet of the laminator to obtain the multilayer composite material with high barrier property; the high-barrier-property multilayer composite material sequentially comprises a first basic barrier material layer, an nth basic barrier material layer and a plurality of barrier layers from outside to inside, wherein n is an integer larger than 4.
Description
Technical Field
The invention relates to the technical field of barrier materials, in particular to a preparation method of a high-barrier multilayer composite material.
Background
As a new material developed in the 20 th century, the polymer material has the characteristics of superior comprehensive performance, relatively simple and convenient forming process, easy modification, easy processing and the like, so that the polymer material has excellent performances incomparable and irreplaceable with other materials, has wide application in various fields such as packaging materials, automobile materials, medical materials, military materials and the like, and becomes an indispensable material in various aspects of clothing, food, living and use in social life. With the development of society and the progress of science and technology, the requirements of various application fields on the performance of polymer materials are higher and more diversified. It is desirable that polymeric materials have both high strength and good toughness; the material is high temperature resistant and convenient to machine and form; it is durable and low in cost. Obviously, it is difficult to achieve these requirements with a single polymer material, and thus modifying polymer materials is becoming an important approach for developing high-performance polymer materials.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a preparation method of a high-barrier multilayer composite material, which can be used for preparing a barrier material with high barrier property and good mechanical property.
In order to achieve the above object, the present invention provides a method for preparing a multilayer composite material with high barrier property, comprising the steps of: providing nylon 6, high density polyethylene pellets, EVOH pellets and ethylene propylene diene monomer rubber pellets; mixing nylon 6 and ethylene propylene diene monomer particles to obtain a first mixture; mixing the high-density polyethylene granules and the EVOH granules to obtain a second mixture; putting the first mixture into a first double-screw extruder for extrusion molding to obtain a first mixed melt; putting the second mixture into a second double-screw extruder for extrusion molding to obtain a second mixed melt; introducing the first mixed melt and the second mixed melt into a laminator, and calendering the laminated body at the outlet of the laminator to obtain the multilayer composite material with high barrier property; the high-barrier-property multilayer composite material sequentially comprises a first basic barrier material layer, an nth basic barrier material layer and a high-density polyethylene/EVOH mixed layer from outside to inside, wherein n is an integer larger than 4, and each basic barrier material layer sequentially comprises a nylon 6/ethylene propylene diene monomer mixed layer and the high-density polyethylene/EVOH mixed layer from outside to inside.
In a preferred embodiment, the preparation method further comprises the following steps: mixing the high-density polyethylene granules and the ethylene propylene diene monomer granules to obtain a third mixture; putting the third mixture into a third double-screw extruder for extrusion molding to obtain a third mixed melt; introducing the first mixed melt, the second mixed melt and the third mixed melt into a laminator, and calendering the laminated body at the outlet of the laminator to obtain the multilayer composite material with high barrier property; the high-barrier-property multilayer composite material sequentially comprises a first basic barrier material layer, an nth basic barrier material layer and a nylon 6/ethylene propylene diene monomer mixed layer from outside to inside, wherein n is an integer larger than 4, and each basic barrier material layer sequentially comprises a nylon 6/ethylene propylene diene monomer mixed layer, a high-density polyethylene/EVOH mixed layer and a high-density polyethylene/ethylene propylene diene monomer mixed layer from outside to inside.
In a preferred embodiment, the preparation method further comprises the following steps: mixing nylon 6 and the high-density polyethylene granules to obtain a fourth mixture; putting the fourth mixture into a fourth double-screw extruder for extrusion molding to obtain a fourth mixed melt; introducing the first mixed melt, the second mixed melt, the third mixed melt and the fourth mixed melt into a laminator, and calendering the laminated body at the outlet of the laminator to obtain the multilayer composite material with high barrier property; the high-barrier-property multilayer composite material sequentially comprises a first basic barrier material layer, an nth basic barrier material layer and a nylon 6/high-density polyethylene mixed layer from outside to inside, wherein n is an integer larger than 4, and each basic barrier material layer sequentially comprises a nylon 6/ethylene propylene diene monomer mixed layer, a high-density polyethylene/EVOH mixed layer, a high-density polyethylene/ethylene propylene diene monomer mixed layer and a nylon 6/high-density polyethylene mixed layer from outside to inside.
In a preferred embodiment, the preparation method further comprises the following steps: respectively introducing the first mixed melt, the second mixed melt, the third mixed melt, the fourth mixed melt and the second mixed melt into five parallel inlets of a laminator, and calendering a laminated body at an outlet of the laminator to obtain a high-barrier multilayer composite material; the high-barrier-property multilayer composite material sequentially comprises a first basic barrier material layer, an nth basic barrier material layer and a second basic barrier material layer from outside to inside, wherein n is an integer larger than 4, and each basic barrier material layer sequentially comprises a nylon 6/ethylene propylene diene monomer mixed layer, a high-density polyethylene/EVOH mixed layer, a high-density polyethylene/ethylene propylene diene monomer mixed layer, a nylon 6/high-density polyethylene mixed layer and a second high-density polyethylene/EVOH mixed layer from outside to inside.
In a preferred embodiment, the mass ratio of the nylon 6 to the ethylene propylene diene monomer particles in the first compound is (5-10): 1.
In a preferred embodiment, the mass ratio of the high-density polyethylene pellets to the EVOH pellets in the second compound is (2-5): 1.
In a preferred embodiment, the mass ratio of the high-density polyethylene pellets to the ethylene-propylene-diene monomer rubber particles in the third compound is (4-8): 1.
In a preferred embodiment, the mass ratio of the nylon 6 to the high-density polyethylene pellets in the fourth blend is (2-3): 1.
In a preferred embodiment, the process for extruding the first compound and the fourth compound is specifically as follows: the rotation speed of the extruder is 70-100rpm, the temperature of the first zone is 190-.
In a preferred embodiment, the process for extruding the second compound and the third compound is specifically as follows: the rotation speed of the extruder is 70-100rpm, the temperature of the first zone is 170-.
Compared with the prior art, the preparation method of the multilayer composite material with high barrier property has the following advantages: barrier materials are an important class of polymer materials, and how to improve the barrier property and the mechanical property of the barrier materials is a problem in the field. According to the preparation method, the multi-layer barrier material with the micro-layer structure and the superstructure is prepared through a micro-nano lamination technology, and the barrier material with high barrier property and good mechanical property is obtained through designing layer composition and layer arrangement modes. Meanwhile, the invention develops a special preparation process aiming at the special structure and special composition of the application.
Drawings
Figure 1 is a schematic structural view of a high barrier multilayer composite according to an embodiment of the present invention.
Figure 2 is a schematic view of a basic barrier material layer structure according to an embodiment of the present invention.
Figure 3 is a schematic view of a basic barrier material layer structure according to an embodiment of the present invention.
Figure 4 is a schematic view of a basic barrier material layer structure according to an embodiment of the present invention.
Figure 5 is a schematic view of a basic barrier material layer structure according to an embodiment of the present invention.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Figure 1 is a schematic diagram of a high barrier multilayer composite structure according to an embodiment of the present invention. As shown, the high-barrier multilayer composite of the present invention comprises, in order from the outside to the inside, a first base barrier material layer 101, a second base barrier material layer 102, a third base barrier material layer 103 … and an nth base barrier material layer 104, where n is an integer greater than 4.
Figure 2 is a schematic view of a basic barrier material layer structure according to an embodiment of the present invention. Each basic barrier material layer comprises a nylon 6/ethylene propylene diene monomer mixed layer 201 and a high-density polyethylene/EVOH mixed layer 202 from outside to inside in sequence.
Figure 3 is a schematic view of a basic barrier material layer structure according to an embodiment of the present invention. Each basic separation material layer comprises a nylon 6/ethylene propylene diene monomer mixed layer 201, a high-density polyethylene/EVOH mixed layer 202 and a high-density polyethylene/ethylene propylene diene monomer mixed layer 303 from outside to inside in sequence.
Figure 4 is a schematic view of a basic barrier material layer structure according to an embodiment of the present invention. Each basic separation material layer comprises a nylon 6/ethylene propylene diene monomer mixed layer 201, a high-density polyethylene/EVOH mixed layer 202, a high-density polyethylene/ethylene propylene diene monomer mixed layer 303 and a nylon 6/high-density polyethylene mixed layer 404 from outside to inside in sequence.
Figure 5 is a schematic view of a basic barrier material layer structure according to an embodiment of the present invention. Each basic separation material layer comprises a nylon 6/ethylene propylene diene monomer mixed layer 201, a high-density polyethylene/EVOH mixed layer 202, a high-density polyethylene/ethylene propylene diene monomer mixed layer 303, a nylon 6/high-density polyethylene mixed layer 404 and a second high-density polyethylene/EVOH mixed layer 505 in sequence from outside to inside.
Example 1
The preparation method of the multilayer composite material with high barrier property comprises the following steps: providing nylon 6, high density polyethylene pellets, EVOH pellets and ethylene propylene diene monomer rubber pellets; mixing nylon 6 and ethylene propylene diene monomer particles to obtain a first mixture; mixing the high-density polyethylene granules and the EVOH granules to obtain a second mixture; putting the first mixture into a first double-screw extruder for extrusion molding to obtain a first mixed melt; putting the second mixture into a second double-screw extruder for extrusion molding to obtain a second mixed melt; introducing the first mixed melt and the second mixed melt into a laminator (the laminator is provided with two inlets, the first mixed melt enters the first inlet, the second mixed melt enters the second inlet, the structure of the laminator is the prior art, and a plurality of papers and patents of Beijing chemical university disclose the specific structure of the laminator, which are not repeated in the application), and calendering the laminated body at the outlet of the laminator to obtain the multilayer composite material with high barrier property; the high-barrier-property multilayer composite material sequentially comprises a first basic barrier material layer, a second basic barrier material layer and an nth basic barrier material layer from outside to inside, wherein n is 6, and each basic barrier material layer sequentially comprises a nylon 6/ethylene propylene diene monomer mixed layer and a high-density polyethylene/EVOH mixed layer from outside to inside. In the first mixture, the mass ratio of the nylon 6 to the ethylene propylene diene monomer particles is 5: 1. In the second blend, the mass ratio of the high-density polyethylene pellets to the EVOH pellets was 2: 1. The process for extruding the first mixture specifically comprises the following steps: the extruder speed was 70rpm, the first zone temperature was 190 ℃, the second zone temperature was 200 ℃, the third zone temperature was 210 ℃ and the fourth zone temperature was 220 ℃. The process for extruding the second mixture specifically comprises the following steps: the extruder speed was 70rpm, the first zone temperature was 170 ℃, the second zone temperature was 180 ℃, the third zone temperature was 190 ℃ and the fourth zone temperature was 195 ℃.
Example 2
The preparation method of the multilayer composite material with high barrier property comprises the following steps: providing nylon 6, high density polyethylene pellets, EVOH pellets and ethylene propylene diene monomer rubber pellets; mixing nylon 6 and ethylene propylene diene monomer particles to obtain a first mixture; mixing the high-density polyethylene granules and the EVOH granules to obtain a second mixture; putting the first mixture into a first double-screw extruder for extrusion molding to obtain a first mixed melt; putting the second mixture into a second double-screw extruder for extrusion molding to obtain a second mixed melt; mixing the high-density polyethylene granules and the ethylene propylene diene monomer granules to obtain a third mixture; putting the third mixture into a third double-screw extruder for extrusion molding to obtain a third mixed melt; introducing the first mixed melt, the second mixed melt and the third mixed melt into a laminator, and calendering the laminated body at the outlet of the laminator to obtain the multilayer composite material with high barrier property; the high-barrier-property multilayer composite material sequentially comprises a first basic barrier material layer, an nth basic barrier material layer and a nylon 6/ethylene propylene diene monomer mixed layer from outside to inside, wherein n is 6, and each basic barrier material layer sequentially comprises a nylon 6/ethylene propylene diene monomer mixed layer, a high-density polyethylene/EVOH mixed layer and a high-density polyethylene/ethylene propylene diene monomer mixed layer from outside to inside. In the first mixture, the mass ratio of the nylon 6 to the ethylene propylene diene monomer particles is 10: 1. In the second blend, the mass ratio of the high-density polyethylene pellets to the EVOH pellets was 5: 1. In the third mixed material, the mass ratio of the high-density polyethylene pellets to the ethylene propylene diene monomer rubber particles is 8: 1. In the fourth blend, the mass ratio of the nylon 6 to the high density polyethylene pellets was 3: 1. The process for extruding the first mixture specifically comprises the following steps: the speed of the extruder was 100rpm, the first zone temperature was 200 ℃, the second zone temperature was 210 ℃, the third zone temperature was 220 ℃ and the fourth zone temperature was 230 ℃. The process for extruding the second mixture and the third mixture comprises the following specific steps: the speed of the extruder was 100rpm, the first zone temperature was 180 ℃, the second zone temperature was 190 ℃, the third zone temperature was 195 ℃ and the fourth zone temperature was 200 ℃.
Example 3
The preparation method of the multilayer composite material with high barrier property comprises the following steps: providing nylon 6, high density polyethylene pellets, EVOH pellets and ethylene propylene diene monomer rubber pellets; mixing nylon 6 and ethylene propylene diene monomer particles to obtain a first mixture; mixing the high-density polyethylene granules and the EVOH granules to obtain a second mixture; putting the first mixture into a first double-screw extruder for extrusion molding to obtain a first mixed melt; putting the second mixture into a second double-screw extruder for extrusion molding to obtain a second mixed melt; mixing the high-density polyethylene granules and the ethylene propylene diene monomer granules to obtain a third mixture; putting the third mixture into a third double-screw extruder for extrusion molding to obtain a third mixed melt; mixing nylon 6 and the high-density polyethylene granules to obtain a fourth mixture; putting the fourth mixture into a fourth double-screw extruder for extrusion molding to obtain a fourth mixed melt; introducing the first mixed melt, the second mixed melt, the third mixed melt and the fourth mixed melt into a laminator, and calendering the laminated body at the outlet of the laminator to obtain a multilayer composite material with high barrier property; the high-barrier-property multilayer composite material sequentially comprises a first basic barrier material layer, an nth basic barrier material layer and a nylon 6/high-density polyethylene mixed layer from outside to inside, wherein n is 7, and each basic barrier material layer sequentially comprises a nylon 6/ethylene propylene diene monomer mixed layer, a high-density polyethylene/EVOH mixed layer, a high-density polyethylene/ethylene propylene diene monomer mixed layer and a nylon 6/high-density polyethylene mixed layer from outside to inside. In the first mixture, the mass ratio of the nylon 6 to the ethylene propylene diene monomer particles is 8: 1. In the second blend, the mass ratio of the high-density polyethylene pellets to the EVOH pellets was 3: 1. In the third mixed material, the mass ratio of the high-density polyethylene pellets to the ethylene propylene diene monomer rubber particles is 6: 1. In the fourth blend, the mass ratio of the nylon 6 to the high density polyethylene pellets was 2.5: 1. The process for extruding the first mixture and the fourth mixture comprises the following specific steps: the extruder speed was 80rpm, the first zone temperature was 195 deg.C, the second zone temperature was 205 deg.C, the third zone temperature was 215 deg.C, and the fourth zone temperature was 225 deg.C. The process for extruding the second mixture and the third mixture comprises the following specific steps: the extruder speed was 80rpm, the first zone temperature was 175 deg.C, the second zone temperature was 185 deg.C, the third zone temperature was 192 deg.C, and the fourth zone temperature was 198 deg.C.
Example 4
The preparation method of the multilayer composite material with high barrier property comprises the following steps: providing nylon 6, high density polyethylene pellets, EVOH pellets and ethylene propylene diene monomer rubber pellets; mixing nylon 6 and ethylene propylene diene monomer particles to obtain a first mixture; mixing the high-density polyethylene granules and the EVOH granules to obtain a second mixture; putting the first mixture into a first double-screw extruder for extrusion molding to obtain a first mixed melt; putting the second mixture into a second double-screw extruder for extrusion molding to obtain a second mixed melt; mixing the high-density polyethylene granules and the ethylene propylene diene monomer granules to obtain a third mixture; putting the third mixture into a third double-screw extruder for extrusion molding to obtain a third mixed melt; mixing nylon 6 and the high-density polyethylene granules to obtain a fourth mixture; putting the fourth mixture into a fourth double-screw extruder for extrusion molding to obtain a fourth mixed melt; respectively introducing the first mixed melt, the second mixed melt, the third mixed melt, the fourth mixed melt and the second mixed melt into five parallel inlets of a laminator, and calendering a laminated body at an outlet of the laminator to obtain a high-barrier multilayer composite material; the high-barrier-property multilayer composite material sequentially comprises a first basic barrier material layer, an nth basic barrier material layer and 8 n from outside to inside, and each basic barrier material layer sequentially comprises a nylon 6/ethylene propylene diene monomer mixed layer, a high-density polyethylene/EVOH mixed layer, a high-density polyethylene/ethylene propylene diene monomer mixed layer, a nylon 6/high-density polyethylene mixed layer and a second high-density polyethylene/EVOH mixed layer from outside to inside. In the first mixture, the mass ratio of the nylon 6 to the ethylene propylene diene monomer particles is 5: 1. In the second blend, the mass ratio of the high-density polyethylene pellets to the EVOH pellets was 2: 1. In the third mixed material, the mass ratio of the high-density polyethylene pellets to the ethylene propylene diene monomer rubber particles was 4: 1. In the fourth blend, the mass ratio of the nylon 6 to the high density polyethylene pellets was 2: 1. The process for extruding the first mixture and the fourth mixture comprises the following specific steps: the extruder speed was 70rpm, the first zone temperature was 190 ℃, the second zone temperature was 200 ℃, the third zone temperature was 210 ℃ and the fourth zone temperature was 220 ℃. The process for extruding the second mixture and the third mixture comprises the following specific steps: the extruder speed was 70rpm, the first zone temperature was 170 ℃, the second zone temperature was 180 ℃, the third zone temperature was 190 ℃ and the fourth zone temperature was 195 ℃.
Comparative example 1
The high-barrier-property multilayer composite material sequentially comprises a first basic barrier material layer, a second basic barrier material layer and a third basic barrier material layer from outside to inside, and each basic barrier material layer sequentially comprises a nylon 6/ethylene propylene diene monomer mixed layer, a high-density polyethylene/EVOH mixed layer, a high-density polyethylene/ethylene propylene diene monomer mixed layer, a nylon 6/high-density polyethylene mixed layer and a second high-density polyethylene/EVOH mixed layer from outside to inside. The preparation process and parameters were the same as in example 4.
Comparative example 2
The high-barrier multilayer composite material comprises first to nth basic barrier material layers in sequence from outside to inside, wherein n is 8, and each basic barrier material layer comprises a first high-density polyethylene/EVOH mixed layer, a second high-density polyethylene/EVOH mixed layer, a third high-density polyethylene/EVOH mixed layer and a fourth high-density polyethylene/EVOH mixed layer in sequence from outside to inside. The preparation process and parameters were the same as in example 4.
Comparative example 3
The high-barrier-property multilayer composite material sequentially comprises a first basic barrier material layer, an nth basic barrier material layer and a third basic barrier material layer from outside to inside, wherein n is 8, and each basic barrier material layer sequentially comprises a high-density polyethylene/EVOH mixed layer, a nylon 6/ethylene propylene diene monomer mixed layer, a nylon 6/high-density polyethylene mixed layer and a high-density polyethylene/ethylene propylene diene monomer mixed layer from outside to inside. The preparation process and parameters were the same as in example 4.
Comparative example 4
The high-barrier-property multilayer composite material sequentially comprises a first basic barrier material layer, an nth basic barrier material layer and a nylon 6/ethylene propylene diene monomer mixed layer from outside to inside, wherein n is 8, and each basic barrier material layer sequentially comprises the nylon 6/ethylene propylene diene monomer mixed layer, the high-density polyethylene/EVOH mixed layer and the nylon 6/ethylene propylene diene monomer mixed layer from outside to inside. The preparation process and parameters were the same as in example 4.
Comparative example 5
Unlike example 4, the mass ratio of nylon 6 to epdm particles in the first compound was 12: 1.
Comparative example 6
In contrast to example 4, the mass ratio of the high-density polyethylene pellets to the EVOH pellets in the second compounded material was 6: 1.
Comparative example 7
In contrast to example 4, in the third blend the mass ratio of the high density polyethylene pellets to the ethylene propylene diene monomer particles was 10: 1.
Comparative example 8
Unlike example 4, in the fourth blend, the mass ratio of nylon 6 to high density polyethylene pellets was 5: 1.
Comparative example 9
Different from the example 4, the process for extruding the first mixture and the fourth mixture is specifically as follows: the extruder speed was 120rpm, the first zone temperature was 185 ℃, the second zone temperature was 190 ℃, the third zone temperature was 200 ℃ and the fourth zone temperature was 210 ℃.
Comparative example 10
Different from the example 4, the process for extruding the second mixture and the third mixture is specifically as follows: the extruder speed was 120rpm, the first zone temperature was 185 ℃, the second zone temperature was 195 ℃, the third zone temperature was 200 ℃ and the fourth zone temperature was 205 ℃.
Tensile strength (MPa), impact strength (kJ/m) of examples 1 to 4 and comparative examples 1 to 10 were tested2) And permeability (as measured by the American society for testing and materials ASTM D2684-89 standard, the permeant is selected to be benzene, and the results are in percent).
TABLE 1
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (1)
1. A method of preparing a high barrier multilayer composite comprising the steps of: providing nylon 6, high density polyethylene pellets, EVOH pellets and ethylene propylene diene monomer rubber pellets; mixing nylon 6 and ethylene propylene diene monomer particles to obtain a first mixture; mixing the high-density polyethylene granules and the EVOH granules to obtain a second mixture; putting the first mixture into a first double-screw extruder for extrusion molding to obtain a first mixed melt; putting the second mixture into a second double-screw extruder for extrusion molding to obtain a second mixed melt; mixing the high-density polyethylene granules and the ethylene propylene diene monomer granules to obtain a third mixture; putting the third mixture into a third double-screw extruder for extrusion molding to obtain a third mixed melt; mixing nylon 6 and the high-density polyethylene granules to obtain a fourth mixture; putting the fourth mixture into a fourth double-screw extruder for extrusion molding to obtain a fourth mixed melt; respectively introducing the first mixed melt, the second mixed melt, the third mixed melt, the fourth mixed melt and the second mixed melt into five parallel inlets of a laminator, and calendering a laminated body at an outlet of the laminator to obtain a high-barrier multilayer composite material; wherein the high-barrier multilayer composite material comprises first to nth basic barrier material layers in sequence from outside to inside, n is 8, and each basic barrier material layer comprises a nylon 6/ethylene propylene diene monomer mixed layer, a high-density polyethylene/EVOH mixed layer, a high-density polyethylene/ethylene propylene diene monomer mixed layer, a nylon 6/high-density polyethylene mixed layer and a second high-density polyethylene/EVOH mixed layer in sequence from outside to inside, the mass ratio of the nylon 6 to the ethylene propylene diene monomer particles in the first mixture is 5:1, the mass ratio of the high-density polyethylene pellets to the EVOH pellets in the second mixture is 2:1, the mass ratio of the high-density polyethylene pellets to the ethylene propylene diene monomer particles in the third mixture is 4:1, the mass ratio of the nylon 6 to the high-density polyethylene pellets in the fourth mixture is 2:1, the process for extruding the first mixture and the fourth mixture comprises the following specific steps: the rotating speed of the extruder is 70rpm, the temperature of the first zone is 190 ℃, the temperature of the second zone is 200 ℃, the temperature of the third zone is 210 ℃, the temperature of the fourth zone is 220 ℃, and the process for extruding the second mixture and the third mixture specifically comprises the following steps: the extruder speed was 70rpm, the first zone temperature was 170 ℃, the second zone temperature was 180 ℃, the third zone temperature was 190 ℃ and the fourth zone temperature was 195 ℃.
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Effective date of registration: 20210426 Address after: 528000 no.9-2, Maicun second industrial zone, Xingtan town, Shunde District, Foshan City, Guangdong Province Applicant after: Guangdong Shunde Yongming Zhongrui New Material Co.,Ltd. Address before: 362214 Quanzhou, Jinjiang, Fujian province Jinjiang Town, Yangao Town, Yang Wei Industrial Zone, South Ring No. 106. Applicant before: QUANZHOU XINGUI MACHINERY EQUIPMENT Co.,Ltd. |
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