CN111320820A - High-expansion-multiple wire harness sheath material and preparation method thereof - Google Patents
High-expansion-multiple wire harness sheath material and preparation method thereof Download PDFInfo
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- CN111320820A CN111320820A CN202010153110.7A CN202010153110A CN111320820A CN 111320820 A CN111320820 A CN 111320820A CN 202010153110 A CN202010153110 A CN 202010153110A CN 111320820 A CN111320820 A CN 111320820A
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- 239000000463 material Substances 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 229920002943 EPDM rubber Polymers 0.000 claims abstract description 38
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 13
- 239000006229 carbon black Substances 0.000 claims abstract description 12
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 8
- 239000000314 lubricant Substances 0.000 claims abstract description 8
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 8
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000008117 stearic acid Substances 0.000 claims abstract description 8
- 239000011787 zinc oxide Substances 0.000 claims abstract description 8
- DUEPRVBVGDRKAG-UHFFFAOYSA-N carbofuran Chemical compound CNC(=O)OC1=CC=CC2=C1OC(C)(C)C2 DUEPRVBVGDRKAG-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000004014 plasticizer Substances 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 5
- 229920003051 synthetic elastomer Polymers 0.000 claims description 29
- 239000005061 synthetic rubber Substances 0.000 claims description 29
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 9
- 229910052717 sulfur Inorganic materials 0.000 claims description 9
- 239000011593 sulfur Substances 0.000 claims description 9
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 8
- 239000005977 Ethylene Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 7
- 239000005060 rubber Substances 0.000 claims description 7
- 238000004073 vulcanization Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 description 8
- 238000004806 packaging method and process Methods 0.000 description 5
- 238000009966 trimming Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000005662 Paraffin oil Substances 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- 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
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/0207—Wire harnesses
- B60R16/0215—Protecting, fastening and routing means therefor
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a high-expansion-multiple wire harness sheath material which comprises the following raw materials in parts by weight: 100-150 parts of ethylene propylene diene monomer, 40-60 parts of carbon black, 20-40 parts of carbofuran powder, 40-65 parts of plasticizer, 3-7 parts of indirect zinc oxide, 0.5-1.5 parts of stearic acid, 1.5-3 parts of lubricant, 2.5-3.5 parts of accelerator and 0.5-1.5 parts of vulcanizing agent. The invention also discloses a preparation method of the high-expansion-factor wire harness sheath material. The invention has high strength, high filling performance and high expansion multiple.
Description
Technical Field
The invention relates to the technical field of wire harness sheaths, in particular to a wire harness sheath material with high expansion multiple and a preparation method thereof.
Background
The automobile wire harness sheath is a network main body of a circuit on an automobile and plays roles of wire harness waterproofing, shock absorption, protection and the like. In order to facilitate automobile assembly and reduce installation resistance, the hardness of a common wire harness sheath product is 40-50 Shore A, and meanwhile, the product needs to be expanded by at least 3-5 times, and partially or even more than 5 times in the assembly process, so that very high requirements on the strength and the elongation at break of the material are met. Since EPDM rubber is not a self-reinforcing rubber unlike natural rubber, the low hardness material tends to be not strong and may cause product breakage during assembly and use due to high expansion. Therefore, the development of a high-expansion-factor wire harness sheath product has great application prospect.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a high-expansion-factor wire harness sheath material and a preparation method thereof.
The invention provides a high expansion multiple wire harness sheath material which comprises the following raw materials in parts by weight: 100-150 parts of ethylene propylene diene monomer, 40-60 parts of carbon black, 20-40 parts of carbofuran powder, 40-65 parts of plasticizer, 3-7 parts of indirect zinc oxide, 0.5-1.5 parts of stearic acid, 1.5-3 parts of lubricant, 2.5-3.5 parts of accelerator and 0.5-1.5 parts of vulcanizing agent.
The Qiangwei powder is artificially synthesized nano flaky filler, has high flaky structure and superfine granularity, and can be purchased from the market.
Preferably, the ethylene propylene diene monomer rubber is oil-filled ethylene propylene diene monomer rubber and non-oil-filled ethylene propylene diene monomer rubber, wherein the weight ratio of the oil-filled ethylene propylene diene monomer rubber to the non-oil-filled ethylene propylene diene monomer rubber is 1-2: 1.
Preferably, the ethylene-propylene-diene monomer has an ethylene content of 65 to 75 wt.% and a Mooney viscosity ML1+4The temperature (100 ℃) is 60-70.
Preferably, the plasticizer is a naphthenic oil.
Preferably, the naphthenic oil has a flash point of 210 ℃ or more and a kinematic viscosity of 8 to 12mm at 100 DEG C2/s。
Preferably, the vulcanizing agent is sulfur.
The invention also provides a preparation method of the high expansion multiple wire harness sheath material, which comprises the following steps: mixing the raw materials, smashing the rubber, and discharging the rubber to obtain synthetic rubber; heating, molding and cutting the synthetic rubber to obtain a molded part; and vulcanizing the formed part, and then preserving heat to obtain the high-expansion-multiple wire harness sheath material.
Preferably, the vulcanization pressure is 170-2The temperature is 170-180 ℃, and the time is 250-350 s.
Preferably, the temperature is maintained at 150 ℃ and 180 ℃ for 2-4 h.
Compared with the prior art, the wire harness sheath product has the advantages of low hardness, high strength, high elongation and the like, and can meet the requirement of high expansion multiple required to be ensured in the assembly process of the wire harness sheath products.
The oil-filled ethylene propylene diene monomer rubber and the non-oil-filled ethylene propylene diene monomer rubber are used together in a proper proportion, and the ethylene content and the Mooney viscosity of the oil-filled ethylene propylene diene monomer rubber are limited, so that the high strength and the high filling performance of the oil-filled ethylene propylene diene monomer rubber are improved, and simultaneously, the carbon black with high structure and easy dispersion is matched with the Qiangwei powder for use, so that the effect of reinforcing the rubber by 1+1 > 2 is achieved; the plasticizer uses naphthenic oil with high flash point and high viscosity to endow the rubber material with excellent mechanical property; in the selection of a vulcanization system, a traditional system combining sulfur and an accelerator is selected, the polysulfide bond and the monosulfur bond formed by sulfur in vulcanization are low in energy, and can play a role in releasing stress in a stress state to relieve stress concentration, so that a cross-linked network can uniformly bear larger stress and has higher tensile strength; through the mutual matching of all the substances, the invention has high strength, high filling performance and high expansion times.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
A high expansion multiple wire harness sheath material comprises the following raw materials in parts by weight: 100 parts of oil-extended ethylene propylene diene monomer, 50 parts of non-oil-extended ethylene propylene diene monomer, N-55055 parts of carbon black, 20 parts of carbofuran powder, 40 parts of naphthenic oil, 5 parts of indirect zinc oxide, 1 part of stearic acid, 2122 parts of lubricant WB, 3 parts of accelerator and 800.8 parts of sulfur;
wherein the ethylene content of the ethylene propylene diene monomer is 70 wt%, and the Mooney viscosity ML1+465 ℃ at 100 ℃, the flash point of the naphthenic oil is more than or equal to 210 ℃, and the kinematic viscosity of the naphthenic oil is 10mm at 100 DEG C2/s。
The preparation method of the high expansion multiple wire harness sheath material comprises the following steps:
adding the raw materials into an internal mixer for mixing, smashing the materials by an open mill, and discharging the materials to obtain synthetic rubber, wherein the hardness of the synthetic rubber is 41 ℃, the strength of the synthetic rubber is 17.2MPa, and the elongation of the synthetic rubber is 853%;
uniformly heating synthetic rubber through an open mill, then molding in a preforming machine, and cutting to obtain a molded part; taking a formed part, putting the formed part into a mold cavity, and adjusting the pressure to 180Kgf/cm2Vulcanizing at 175 ℃ for 300 s;
and then trimming the vulcanized product, preserving heat for 3 hours in a high-temperature oven at 165 ℃, finally inspecting the size and the appearance, packaging and warehousing to obtain the high-expansion-multiple wire harness sheath material.
Example 2
A high expansion multiple wire harness sheath material comprises the following raw materials in parts by weight: 87.5 parts of oil-extended ethylene propylene diene monomer, 50 parts of non-oil-extended ethylene propylene diene monomer, N-55045 parts of carbon black, 30 parts of carbofuran powder, 45 parts of naphthenic oil, 5 parts of indirect zinc oxide, 1 part of stearic acid, 2122 parts of lubricant WB, 3 parts of accelerator and 800.8 parts of sulfur;
wherein the ethylene content of the ethylene propylene diene monomer is 70 wt%, and the Mooney viscosity ML1+465 ℃ at 100 ℃, the flash point of the naphthenic oil is more than or equal to 210 ℃, and the kinematic viscosity of the naphthenic oil is 10mm at 100 DEG C2/s。
The preparation method of the high expansion multiple wire harness sheath material comprises the following steps:
mixing the raw materials in an internal mixer, smashing the mixture by an open mill, and discharging the mixture to obtain synthetic rubber, wherein the hardness of the synthetic rubber is 43 degrees, the strength of the synthetic rubber is 16.8MPa, and the elongation of the synthetic rubber is 826%;
uniformly heating synthetic rubber through an open mill, then molding in a preforming machine, and cutting to obtain a molded part; taking a formed part, putting the formed part into a mold cavity, and adjusting the pressure to 180Kgf/cm2Vulcanizing at 175 ℃ for 300 s;
and then trimming the vulcanized product, preserving heat for 3 hours in a high-temperature oven at 165 ℃, finally inspecting the size and the appearance, packaging and warehousing to obtain the high-expansion-multiple wire harness sheath material.
Example 3
A high expansion multiple wire harness sheath material comprises the following raw materials in parts by weight: 75 parts of oil-extended ethylene propylene diene monomer, 50 parts of non-oil-extended ethylene propylene diene monomer, N-55050 parts of carbon black, 25 parts of carbofuran powder, 65 parts of paraffin oil, 5 parts of indirect zinc oxide, 1 part of stearic acid, 2122 parts of lubricant WB, 3 parts of accelerator and 800.8 parts of sulfur;
wherein the ethylene content of the ethylene propylene diene monomer is 70 wt%, and the Mooney viscosity ML1+465 ℃ at 100 ℃, the flash point of the naphthenic oil is more than or equal to 210 ℃, and the kinematic viscosity of the naphthenic oil is 10mm at 100 DEG C2/s。
The preparation method of the high expansion multiple wire harness sheath material comprises the following steps:
mixing the raw materials in an internal mixer, smashing the mixture by an open mill, and discharging the mixture to obtain synthetic rubber, wherein the hardness of the synthetic rubber is 40 ℃, the strength of the synthetic rubber is 16.2MPa, and the elongation of the synthetic rubber is 804%;
uniformly heating synthetic rubber through an open mill, then molding in a preforming machine, and cutting to obtain a molded part; taking a formed part, putting the formed part into a mold cavity, and adjusting the pressure to 180Kgf/cm2Vulcanizing at 175 ℃ for 300 s;
and then trimming the vulcanized product, preserving heat for 3 hours in a high-temperature oven at 165 ℃, finally inspecting the size and the appearance, packaging and warehousing to obtain the high-expansion-multiple wire harness sheath material.
Example 4
A high expansion multiple wire harness sheath material comprises the following raw materials in parts by weight: 100 parts of oil-extended ethylene propylene diene monomer, 50 parts of non-oil-extended ethylene propylene diene monomer, N-55060 parts of carbon black, 40 parts of Qiangwei powder, 45 parts of naphthenic oil, 7 parts of indirect zinc oxide, 0.5 part of stearic acid, 2123 parts of lubricant WB, 2.5 parts of accelerator and 801.5 parts of sulfur;
wherein the ethylene content of the ethylene propylene diene monomer is 65 wt%, and the Mooney viscosity ML1+4The temperature of the mixture is 70 ℃ at 100 ℃, the flash point of the naphthenic oil is more than or equal to 210 ℃, and the kinematic viscosity of the naphthenic oil is 8mm at 100 DEG C2/s。
The preparation method of the high expansion multiple wire harness sheath material comprises the following steps:
mixing the raw materials in an internal mixer, smashing the mixture by an open mill, and discharging the mixture to obtain synthetic rubber, wherein the hardness of the synthetic rubber is 44 ℃, the strength of the synthetic rubber is 18.4MPa, and the elongation of the synthetic rubber is 902%;
uniformly heating synthetic rubber through an open mill, then molding in a preforming machine, and cutting to obtain a molded part; taking a formed part, putting the formed part into a mold cavity, and adjusting the pressure to 170Kgf/cm2Vulcanizing at 180 ℃ for 250 s;
and then trimming the vulcanized product, preserving heat for 2 hours in a high-temperature oven at 170 ℃, finally inspecting the size and the appearance, packaging and warehousing to obtain the high-expansion-multiple wire harness sheath material.
Example 5
A high expansion multiple wire harness sheath material comprises the following raw materials in parts by weight: 70 parts of oil-extended ethylene propylene diene monomer, 50 parts of non-oil-extended ethylene propylene diene monomer, N-55040 parts of carbon black, 40 parts of Qiangwei powder, 60 parts of naphthenic oil, 3 parts of indirect zinc oxide, 1.5 parts of stearic acid, 2121.5 parts of lubricant WB, 3.5 parts of accelerator and S-800.5 parts of sulfur;
wherein the ethylene content of the ethylene propylene diene monomer is 75 wt%, and the Mooney viscosity ML1+4The temperature of the mixture is 60 ℃ at 100 ℃, the flash point of the naphthenic oil is more than or equal to 210 ℃, and the kinematic viscosity of the naphthenic oil is 12mm at 100 DEG C2/s。
The preparation method of the high expansion multiple wire harness sheath material comprises the following steps:
adding the raw materials into an internal mixer for mixing, smashing the materials by an open mill, and discharging the materials to obtain synthetic rubber, wherein the hardness of the synthetic rubber is 44 ℃, the strength of the synthetic rubber is 17.6MPa, and the elongation of the synthetic rubber is 882%;
uniformly heating synthetic rubber through an open mill, then molding in a preforming machine, and cutting to obtain a molded part; taking a formed part, putting the formed part into a mold cavity, and adjusting the pressure to 190Kgf/cm2Vulcanizing at 170 ℃ for 350 s;
and then trimming the vulcanized product, preserving heat for 4 hours in a high-temperature oven at 150 ℃, finally inspecting the size and the appearance, packaging and warehousing to obtain the high-expansion-multiple wire harness sheath material.
Comparative example 1
The procedure of example 1 was repeated, except that 100 parts of the oil-free EPDM and 90 parts of the naphthenic oil were used.
Comparative example 2
The procedure of example 1 was repeated except that the carbon black N-550 was used instead of the Qiangwei powder.
Comparative example 3
Carbon black N-550 was replaced by Qianwei powder, and the procedure was otherwise the same as in example 1.
The properties of examples 1 to 5 and comparative examples 1 to 3 were measured, and the results are shown in the following table:
it can be seen from the above table that the mechanical properties of the invention are good and the expansion times are high by the mutual matching of the oil-extended EPDM, the non-oil-extended EPDM, the Qiangwei powder and the carbon black N-550.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The high-expansion-factor wire harness sheath material is characterized by comprising the following raw materials in parts by weight: 100-150 parts of ethylene propylene diene monomer, 40-60 parts of carbon black, 20-40 parts of carbofuran powder, 40-65 parts of plasticizer, 3-7 parts of indirect zinc oxide, 0.5-1.5 parts of stearic acid, 1.5-3 parts of lubricant, 2.5-3.5 parts of accelerator and 0.5-1.5 parts of vulcanizing agent.
2. The high expansion factor wire harness sheath material of claim 1, wherein the ethylene propylene diene monomer rubber is oil-filled ethylene propylene diene monomer rubber and non-oil-filled ethylene propylene diene monomer rubber, wherein the weight ratio of the oil-filled ethylene propylene diene monomer rubber to the non-oil-filled ethylene propylene diene monomer rubber is 1-2: 1.
3. The high expansion factor wire harness sheath material according to claim 1 or 2, wherein the ethylene content of the ethylene propylene diene monomer is 65 to 75 wt%, and the Mooney viscosity ML is1+4The temperature (100 ℃) is 60-70.
4. The high expansion factor wire harness sheath material according to any one of claims 1 to 3, wherein the plasticizer is naphthenic oil.
5. The wire harness sheath material with high expansion factor of claim 4, wherein the naphthenic oil has a flash point of 210 ℃ or higher and a kinematic viscosity of 8-12mm at 100 ℃2/s。
6. The high expansion factor strand sheath material of any one of claims 1 to 5, wherein the vulcanizing agent is sulfur.
7. A method for preparing a high expansion factor wire harness sheath material according to any one of claims 1 to 6, characterized by comprising the steps of: mixing the raw materials, smashing the rubber, and discharging the rubber to obtain synthetic rubber; heating, molding and cutting the synthetic rubber to obtain a molded part; and vulcanizing the formed part, and then preserving heat to obtain the high-expansion-multiple wire harness sheath material.
8. The method for preparing a wire harness sheath material with high expansion factor as claimed in claim 7, wherein the vulcanization pressure is 170-2The temperature is 170-180 ℃, and the time is 250-350 s.
9. The method for preparing the harness sheath material with high expansion ratio as claimed in claim 7 or 8, wherein the temperature is maintained at 150 ℃ and 180 ℃ for 2-4 h.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010153110.7A CN111320820A (en) | 2020-03-06 | 2020-03-06 | High-expansion-multiple wire harness sheath material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010153110.7A CN111320820A (en) | 2020-03-06 | 2020-03-06 | High-expansion-multiple wire harness sheath material and preparation method thereof |
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| CN111320820A true CN111320820A (en) | 2020-06-23 |
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Citations (5)
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|---|---|---|---|---|
| CN101824189A (en) * | 2010-04-21 | 2010-09-08 | 北京市射线应用研究中心 | Preparation process of ethylene propylene diene rubber foaming materials |
| CN103694579A (en) * | 2013-12-31 | 2014-04-02 | 长园电子（集团）有限公司 | Electric stress-controlled ethylene propylene diene monomer cold-contraction pipe and preparation method thereof |
| CN104650766A (en) * | 2014-12-17 | 2015-05-27 | 浙江科达利实业有限公司 | Reactive adhesive sizing material and preparation process thereof |
| CN104861314A (en) * | 2015-06-12 | 2015-08-26 | 衡水中铁建工程橡胶有限责任公司 | Microporous rubber base plate and preparation process thereof |
| CN106633435A (en) * | 2016-12-28 | 2017-05-10 | 长园电子（东莞）有限公司 | Ethylene-propylene-diene-terpolymer rubber cold-contraction pipe suitable for high-temperature storage and low-temperature installation and preparation method |
-
2020
- 2020-03-06 CN CN202010153110.7A patent/CN111320820A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824189A (en) * | 2010-04-21 | 2010-09-08 | 北京市射线应用研究中心 | Preparation process of ethylene propylene diene rubber foaming materials |
| CN103694579A (en) * | 2013-12-31 | 2014-04-02 | 长园电子（集团）有限公司 | Electric stress-controlled ethylene propylene diene monomer cold-contraction pipe and preparation method thereof |
| CN104650766A (en) * | 2014-12-17 | 2015-05-27 | 浙江科达利实业有限公司 | Reactive adhesive sizing material and preparation process thereof |
| CN104861314A (en) * | 2015-06-12 | 2015-08-26 | 衡水中铁建工程橡胶有限责任公司 | Microporous rubber base plate and preparation process thereof |
| CN106633435A (en) * | 2016-12-28 | 2017-05-10 | 长园电子（东莞）有限公司 | Ethylene-propylene-diene-terpolymer rubber cold-contraction pipe suitable for high-temperature storage and low-temperature installation and preparation method |
Non-Patent Citations (1)
| Title |
|---|
| 吴宏富著: "《中国粉体工业通鉴：第4卷：2008版》", 30 September 2008, 中国建材工业出版社 * |
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Application publication date: 20200623 |
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| RJ01 | Rejection of invention patent application after publication |