CN114437542B - Nylon 612 composite material for alkali-manganese battery sealing ring and preparation method thereof - Google Patents
Nylon 612 composite material for alkali-manganese battery sealing ring and preparation method thereof Download PDFInfo
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- CN114437542B CN114437542B CN202210155161.2A CN202210155161A CN114437542B CN 114437542 B CN114437542 B CN 114437542B CN 202210155161 A CN202210155161 A CN 202210155161A CN 114437542 B CN114437542 B CN 114437542B
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- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
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Abstract
The invention belongs to the technical field of nylon composite materials, and relates to a nylon 612 composite material for an alkali-manganese cell sealing ring and a preparation method thereof. According to the invention, 0.01-0.05% of polytetrafluoroethylene powder is added on the basis of nylon 612, and the nylon 612 composite material for the alkali-manganese battery sealing ring, which is prepared by optimizing the content of the whole components, has higher bending resistance and moderate toughness; the whole preparation method is simple, has high efficiency and is suitable for large-scale industrial production.
Description
Technical Field
The invention belongs to the technical field of nylon composite materials, and relates to a nylon 612 composite material for an alkali-manganese cell sealing ring and a preparation method thereof.
Background
According to the different processes of alkaline manganese cell production lines, the sealing rings are mainly divided into two main types: ditch-type and fan-shaped. The injection molding process of the groove type sealing ring comprises a cold runner and a hot runner, and the materials mainly comprise nylon 66 and 610. The fan-shaped sealing ring can only be molded by a hot runner due to the structural characteristics, nylon 612 is used as a material, the nylon 612 is high in price, and the hot runner injection molding is selected to be more suitable from the economical and practical aspects. Nylon 612 is more weather resistant in alkaline environments than nylon 66 and 610 and is more leak resistant in batteries, so many battery manufacturers are beginning to upgrade nylon 612 as the gasket material.
However, nylon 612 materials currently used as sealing rings for alkaline manganese cells still have the following drawbacks: the bending resistance is poor, so that the explosion pressure of the injection molded sealing ring exceeds the standard, and the three positive and negative test explosion of the battery is easily caused; the toughness is low, namely the impact strength of the cantilever beam is low, so that the middle hole of the injection-molded sealing ring is easy to crack.
Disclosure of Invention
The invention aims at solving the problems in the prior art and provides a nylon 612 composite material with high bending resistance and moderate toughness for an alkali-manganese cell sealing ring.
The aim of the invention can be achieved by the following technical scheme: a nylon 612 composite material for an alkali-manganese cell sealing ring, which comprises the following raw materials in percentage by mass: 0.5-1.0% of rheological agent, 0.5-1.5% of siloxane, 0.2-0.5% of stearic acid zinc, 0.1-0.5% of nucleating agent, 0.2-0.5% of antioxidant, 0.01-0.05% of polytetrafluoroethylene powder and 96-98% of nylon 612.
In the nylon 612 composite material for the alkali-manganese cell sealing ring, the particle size of polytetrafluoroethylene powder is 1-2 mu m. The polytetrafluoroethylene powder has the characteristics of low friction coefficient, high lubrication, low surface tension, no adhesion and the like, the polytetrafluoroethylene powder with the micro particle size of 1-2 mu m can have good matching effect with the rest raw materials by adding 0.01-0.05%, the high lubrication characteristic of the polytetrafluoroethylene powder plays a role of an internal lubricant in material modification, and the C-F bond of the polytetrafluoroethylene is very stable and cannot react with nylon macromolecules to generate hydrogen bonds, so that the polytetrafluoroethylene powder exists among the nylon macromolecules in a physically doped form, and when the nylon materials are extruded by external force, nylon macromolecule particles release stress through intermolecular movement, so that the bending resistance of the materials is improved, the bursting pressure of an injection molding sealing ring is reduced, and meanwhile, the polytetrafluoroethylene has better toughness, the impact strength of the nylon materials is improved, and the problem of hole cracking in the sealing ring is effectively improved.
In the nylon 612 composite material for the alkali-manganese cell sealing ring, the rheological agent is prepared from the following components in percentage by mass: the mixture of higher fatty alcohol and fatty acid ester of (1-2).
In the nylon 612 composite material for the alkali-manganese cell sealing ring, the nucleating agent is prepared from the following components in percentage by mass: (0.3-0.8) a mixture of sorbitol organics 3988 and a long carbon chain calcium carboxylate salt Cav 102.
In the nylon 612 composite material for the alkali-manganese cell sealing ring, the antioxidant is prepared from the following components in percentage by mass: (1.5-2.5) a mixture of basf 1098 and basf 1076.
The invention also provides a preparation method of the nylon 612 composite material for the alkali-manganese cell sealing ring, which comprises the following steps: the raw materials are uniformly mixed, then put into a double-screw extruder for plasticizing and mixing, and finally extruded and pelletized to obtain the nylon 612 composite material.
In the preparation method of the nylon 612 composite material for the alkali-manganese cell sealing ring, the temperature of the first two sections of the double-screw extruder is 80-160 ℃, the temperature of the second two sections of the double-screw extruder is 235-240 ℃, and the temperature of the second four sections of the double-screw extruder is 160-220 ℃ for mixing. The melting point of nylon 612 is about 220 ℃, the first two sections play a role of uniformly mixing materials, so the temperature is lower, the middle two sections of nylon begin to plasticize, the last four sections of nylon 612 are in a molten state and chemically react with an auxiliary agent, and the nylon is easy to age at high temperature, so the modification temperature is controlled at 230-240 ℃.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, 0.01-0.05% of polytetrafluoroethylene powder is added on the basis of nylon 612, and the nylon 612 composite material for the alkali-manganese battery sealing ring, which is prepared by optimizing the content of the whole components, has higher bending resistance and moderate toughness; the whole preparation method is simple, has high efficiency and is suitable for large-scale industrial production.
Detailed Description
The following are specific examples of the present invention, and the technical solutions of the present invention are further described, but the present invention is not limited to these examples.
Example 1:
s1, preparing the following raw materials in percentage by mass: 0.8% of rheological agent, 1.0% of silicone, 0.3% of zinc stearate, 0.4% of nucleating agent, 0.35% of antioxidant, 0.02% of polytetrafluoroethylene powder with average particle size of 2 mu m and the balance of nylon 612; the rheological agent is 818 and 816A rheological agent of Shandong morning source with the mass ratio of 1:1; the nucleating agent is sorbitol organic matter 3988 and long carbon chain carboxylic acid calcium salt Cav102 with the mass ratio of 1:0.5; the antioxidant is prepared from the following components in percentage by mass: 2 and basf 1098 and basf 1076.
S2, uniformly mixing the raw materials, then putting the raw materials into a double-screw extruder for plasticizing and mixing, and finally extruding and granulating to obtain a nylon 612 composite material;
wherein, the temperature of the first two sections of the double-screw extruder is 100 ℃, the temperature of the middle two ends is 240 ℃, and the temperature of the second four sections is 180 ℃ for mixing.
Example 2:
s1, preparing the following raw materials in percentage by mass: 0.5% of rheological agent, 0.5% of silicone, 0.2% of zinc stearate, 0.2% of nucleating agent, 0.2% of antioxidant, 0.01% of polytetrafluoroethylene powder with average particle size of 2 mu m and the balance of nylon 612; the rheological agent is 818 and 816A rheological agent of Shandong morning source with the mass ratio of 1:2; the nucleating agent is sorbitol organic matter 3988 and long carbon chain carboxylic acid calcium salt Cav102 with the mass ratio of 1:0.8; the antioxidant is prepared from the following components in percentage by mass: 2.5 and basf 1098 and basf 1076.
S2, uniformly mixing the raw materials, then putting the raw materials into a double-screw extruder for plasticizing and mixing, and finally extruding and granulating to obtain a nylon 612 composite material;
wherein, the temperature of the first two sections of the double-screw extruder is 80 ℃, the temperature of the middle two ends is 230 ℃, and the temperature of the second four sections is 160 ℃ for mixing.
Example 3:
s1, preparing the following raw materials in percentage by mass: 1.0% of rheological agent, 1.5% of silicone, 0.5% of zinc stearate, 0.5% of nucleating agent, 0.5% of antioxidant, 0.05% of polytetrafluoroethylene powder with average particle size of 1 mu m and the balance of nylon 612; the rheological agent is 818 and 816A rheological agent of Shandong morning source with the mass ratio of 1:1; the nucleating agent is sorbitol organic matter 3988 and long carbon chain carboxylic acid calcium salt Cav102 with the mass ratio of 1:0.3; the antioxidant is prepared from the following components in percentage by mass: 1.5 and basf 1098 and basf 1076.
S2, uniformly mixing the raw materials, then putting the raw materials into a double-screw extruder for plasticizing and mixing, and finally extruding and granulating to obtain a nylon 612 composite material;
wherein, the temperature of the first two sections of the double-screw extruder is 160 ℃, the temperature of the middle two ends is 240 ℃, and the temperature of the second four sections is 220 ℃ for mixing.
Example 4:
s1, preparing the following raw materials in percentage by mass: 0.8% of rheological agent, 1.0% of silicone, 0.3% of zinc stearate, 0.4% of nucleating agent, 0.35% of antioxidant, 0.02% of polytetrafluoroethylene powder with average particle size of 2 mu m and the balance of nylon 612; the rheological agent is 818 and 816A rheological agent of Shandong morning source with the mass ratio of 1:1; the nucleating agent is sorbitol organic matter 3988 and long carbon chain carboxylic acid calcium salt Cav102 with the mass ratio of 1:0.5; the antioxidant is prepared from the following components in percentage by mass: 2 and basf 1098 and basf 1076.
S2, uniformly mixing the raw materials, then putting the raw materials into a double-screw extruder for plasticizing and mixing, and finally extruding and granulating to obtain a nylon 612 composite material;
wherein, the temperature of the first two sections of the double-screw extruder is 50 ℃, the temperature of the middle two sections is 180 ℃, and the temperature of the second four sections is 130 ℃ for mixing.
Example 5:
s1, preparing the following raw materials in percentage by mass: 0.8% of rheological agent, 1.0% of silicone, 0.3% of zinc stearate, 0.4% of nucleating agent 3988, 0.35% of antioxidant 1098, 0.02% of polytetrafluoroethylene powder and the balance of nylon 612; the rheological agent is 818 and 816A rheological agent of Shandong morning source with the mass ratio of 1:1; the nucleating agent is sorbitol organic matter 3988 and long carbon chain carboxylic acid calcium salt Cav102 with the mass ratio of 1:0.5; the antioxidant is prepared from the following components in percentage by mass: 2 and basf 1098 and basf 1076.
S2, uniformly mixing the raw materials, then putting the raw materials into a double-screw extruder for plasticizing and mixing, and finally extruding and granulating to obtain a nylon 612 composite material;
wherein, the temperature of the first two sections of the twin-screw extruder is 180 ℃, the temperature of the middle two ends is 280 ℃, and the temperature of the second four sections is 250 ℃ for mixing.
Comparative example 1:
the difference from example 1 is that polytetrafluoroethylene powder was not added to the raw material.
Comparative example 2:
the difference from example 1 was that the polytetrafluoroethylene powder was added to the raw material in an amount of 0.1%.
Comparative example 3:
the difference from example 1 was that the amount of polytetrafluoroethylene powder added to the raw material was 1.0%.
Comparative example 4:
the difference from example 1 is only that the polytetrafluoroethylene powder in the raw material had a particle size of 10. Mu.m.
Table 1: nylon 612 composite material performance test results prepared in examples 1-5 and comparative examples 1-3
From the above results, it can be seen that when the addition amount of polytetrafluoroethylene is increased, the hardness of the material is reduced, and the toughness is increased, so that the rigidity of the sealing ring is reduced, and when the gas pressure in the battery is increased, the explosion-proof groove is deformed under stress and cannot be opened in time, so that explosion occurs. And when the grain diameter of polytetrafluoroethylene is enlarged, a good compounding effect cannot be achieved, and the mechanical properties of the modified material are not obviously changed.
In conclusion, the nylon 612 composite material for the alkali-manganese battery sealing ring prepared by adding 0.01-0.05% of polytetrafluoroethylene micropowder based on nylon 612 and optimizing the content of the whole components has higher bending resistance and moderate toughness; the whole preparation method is simple, has high efficiency and is suitable for large-scale industrial production.
The point values in the technical scope of the present invention are not exhaustive, and the new technical solutions formed by equivalent substitution of single or multiple technical features in the technical solutions of the embodiments are also within the scope of the present invention; meanwhile, in all the listed or unrecited embodiments of the present invention, each parameter in the same embodiment represents only one example of the technical scheme (i.e. a feasibility scheme), and no strict coordination and limitation relation exists between each parameter, wherein each parameter can be replaced with each other without violating axiom and the requirement of the present invention, except what is specifically stated.
The technical means disclosed by the scheme of the invention is not limited to the technical means disclosed by the technical means, and also comprises the technical scheme formed by any combination of the technical features. While the foregoing is directed to embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, and such changes and modifications are intended to be included within the scope of the invention.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (4)
1. The nylon 612 composite material for the alkali-manganese cell sealing ring is characterized by comprising the following raw materials in percentage by mass: 0.5-1.0% of rheological agent, 0.5-1.5% of siloxane, 0.2-0.5% of zinc stearate, 0.1-0.5% of nucleating agent, 0.2-0.5% of antioxidant, 0.01-0.05% of polytetrafluoroethylene powder and 96-98% of nylon 612;
the grain diameter of the polytetrafluoroethylene powder is 1-2 mu m;
the rheological agent is prepared from the following components in percentage by mass: a mixture of the higher fatty alcohol and the fatty acid ester of (1-2);
the nucleating agent is prepared from the following components in percentage by mass: (0.3-0.8) a mixture of sorbitol organics 3988 and a long carbon chain calcium carboxylate salt Cav 102.
2. The nylon 612 composite for the alkali-manganese cell sealing ring of claim 1, wherein the antioxidant is prepared from the following components in mass ratio 1: (1.5-2.5) a mixture of basf 1098 and basf 1076.
3. A method of preparing a nylon 612 composite for alkaline manganese cell seal rings as claimed in claim 1, comprising the steps of: the raw materials are uniformly mixed, then put into a double-screw extruder for plasticizing and mixing, and finally extruded and pelletized to obtain the nylon 612 composite material.
4. The method for preparing nylon 612 composite material for alkali-manganese cell sealing rings according to claim 3, wherein the two front sections of the twin-screw extruder are mixed at 80-160 ℃, the two middle sections are mixed at 235-240 ℃ and the four rear sections are mixed at 160-220 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210155161.2A CN114437542B (en) | 2022-02-21 | 2022-02-21 | Nylon 612 composite material for alkali-manganese battery sealing ring and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210155161.2A CN114437542B (en) | 2022-02-21 | 2022-02-21 | Nylon 612 composite material for alkali-manganese battery sealing ring and preparation method thereof |
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| CN114437542B true CN114437542B (en) | 2023-10-17 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09221566A (en) * | 1996-02-16 | 1997-08-26 | Kyoeisha Chem Co Ltd | Heat-resistant lubricant for thermoplastic resin |
| JP2007070538A (en) * | 2005-09-08 | 2007-03-22 | Unitika Ltd | Thermoplastic resin composition for sliding member |
| CN104140671A (en) * | 2014-06-26 | 2014-11-12 | 浙江野马电池有限公司 | Modified nylon 610 material special for alkaline zinc-manganese battery sealing ring |
| CN104788950A (en) * | 2015-04-30 | 2015-07-22 | 长沙五犇新材料科技有限公司 | Wear-resistant self-lubricating nylon composite material, and preparation method and application thereof |
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2022
- 2022-02-21 CN CN202210155161.2A patent/CN114437542B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09221566A (en) * | 1996-02-16 | 1997-08-26 | Kyoeisha Chem Co Ltd | Heat-resistant lubricant for thermoplastic resin |
| JP2007070538A (en) * | 2005-09-08 | 2007-03-22 | Unitika Ltd | Thermoplastic resin composition for sliding member |
| CN104140671A (en) * | 2014-06-26 | 2014-11-12 | 浙江野马电池有限公司 | Modified nylon 610 material special for alkaline zinc-manganese battery sealing ring |
| CN104788950A (en) * | 2015-04-30 | 2015-07-22 | 长沙五犇新材料科技有限公司 | Wear-resistant self-lubricating nylon composite material, and preparation method and application thereof |
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| CN114437542A (en) | 2022-05-06 |
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