CN115368647B - Acid-resistant natural rubber and preparation process and application thereof - Google Patents
Acid-resistant natural rubber and preparation process and application thereof Download PDFInfo
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- CN115368647B CN115368647B CN202211082050.XA CN202211082050A CN115368647B CN 115368647 B CN115368647 B CN 115368647B CN 202211082050 A CN202211082050 A CN 202211082050A CN 115368647 B CN115368647 B CN 115368647B
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- 239000002253 acid Substances 0.000 title claims abstract description 25
- 244000043261 Hevea brasiliensis Species 0.000 title claims abstract description 17
- 229920003052 natural elastomer Polymers 0.000 title claims abstract description 17
- 229920001194 natural rubber Polymers 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 229920001971 elastomer Polymers 0.000 claims abstract description 67
- 238000000034 method Methods 0.000 claims abstract description 31
- 238000005303 weighing Methods 0.000 claims abstract description 27
- 238000003756 stirring Methods 0.000 claims abstract description 26
- 102100034088 40S ribosomal protein S4, X isoform Human genes 0.000 claims abstract description 20
- 101000732165 Homo sapiens 40S ribosomal protein S4, X isoform Proteins 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 238000004806 packaging method and process Methods 0.000 claims abstract description 9
- 239000000853 adhesive Substances 0.000 claims abstract description 3
- 230000001070 adhesive effect Effects 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 31
- 238000004513 sizing Methods 0.000 claims description 29
- 239000003292 glue Substances 0.000 claims description 28
- 238000007689 inspection Methods 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 14
- 239000004033 plastic Substances 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 11
- 238000001125 extrusion Methods 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 230000014759 maintenance of location Effects 0.000 claims description 8
- 241000519995 Stachys sylvatica Species 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 2
- 230000036314 physical performance Effects 0.000 abstract description 2
- 238000012372 quality testing Methods 0.000 abstract 1
- 241000208125 Nicotiana Species 0.000 description 4
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003958 fumigation Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000779 smoke Substances 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
- C08L7/00—Compositions of natural rubber
-
- 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
- B29B7/00—Mixing; Kneading
- B29B7/002—Methods
- B29B7/005—Methods for mixing in batches
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The application discloses acid-resistant natural rubber and a preparation process and application thereof, wherein the process comprises the following operation processes: proportioning WF, SCR10 and RSS, wherein the WF accounts for 20-35 parts by weight, the SCR10 accounts for 35-55 parts by weight and the RSS accounts for 20-35 parts by weight; and sawing the three raw material adhesives, feeding, dry stirring, cooling, weighing, packaging, quality testing and warehousing to obtain the acid-resistant rubber product. The rubber product prepared by the method has the advantages of consistent appearance, no clamping and physical performance index meeting the requirements of aerospace tires; has particular advantages in strong acid resistance compared with other products.
Description
Technical Field
The application relates to the field of natural rubber, in particular to acid-resistant natural rubber and a preparation process and application thereof.
Background
At present, domestic rubber raw materials and technology are difficult to meet the requirements of military industry and aerospace tires.
In addition, few factories produce the products in China, mainly the production of tobacco flakes is low, the technological process adopts fumigation, the current state is strict in forest deforestation management, available firewood for combustion is limited, the required processing time is long, the production efficiency is low, and therefore, enterprises for producing the tobacco flakes in China are few, and the production is low and cannot meet the requirements.
Disclosure of Invention
Aiming at the defects of the prior art, the application provides acid-resistant natural rubber and a preparation process and application thereof. Meanwhile, the production efficiency is improved, the processing time is shortened, and the prepared natural rubber has high acid resistance and high extensibility.
In order to solve the technical problems, the technical scheme of the application is as follows: the preparation process of the acid-resistant natural rubber comprises the following operation processes: mixing WF (full emulsion), SCR10 (No. 10 standard rubber) and primary RSS (primary smoke film) according to the weight parts, wherein the WF accounts for 20-35 parts, the SCR10 accounts for 35-55 parts and the RSS accounts for 20-35 parts; and sawing the three raw material adhesives, feeding, stirring, cooling and entering the next working procedure.
Preferably, WF is 25-30 parts, SCR10 is 40-50 parts, RSS is 25-30 parts, within which the performance is more likely to meet the criteria of high acid resistance and high elongation.
Preferably, the WF, SCR10 and RSS feed stock glue meet the following requirements: p0-50%, PRI 75-90%, mooney viscosity 80-100%, and impurity content 0.01-0.05%.
Preferably, the dry stirring is carried out in two times, the dry stirring extrusion temperature is not more than 130 ℃, and the cooling temperature is not more than 60 ℃.
Preferably, the preparation process further comprises: weighing and packing procedures and quality inspection procedures;
weighing and packaging: weighing the dry stirred and cooled sizing material, wherein the weight of the sizing material is controlled to be 35.00+/-0.05 kg, pressing the weighed sizing material into a cuboid rubber bag, and then re-weighing, wherein the weight of the rubber bag is controlled to be 35.00+/-0.05 kg;
quality inspection procedure: diagonally sampling the rubber bags for spot inspection, wherein the sampling amount is 150+/-5 g, detecting the quality of rubber temperature, foreign matters, white spots, appearance, plastic initial value, plastic retention rate and Mooney viscosity, detecting the metal of all the rubber bags, and removing unqualified products.
Preferably, the RSS is treated by the following method: adding RSS raw material glue into a feeding pool, picking out visible foreign matters, then putting glue blocks, which are crushed to be less than 20cm, of the raw material glue into a mixing pool for foreign matter sorting, putting the glue blocks into a wet stirring machine from the mixing pool for extrusion washing to glue blocks within 15cm, mixing, and after mixing, singly rolling and kneading, wherein the diameter of the extrusion washing glue stock is controlled within 5cm, and then mixing; mixing, pressing for three times, tearing to 0.7cm, packaging, dripping water, drying at 70-90deg.C for 460-500s, controlling the temperature of the discharged glue within 50deg.C, weighing, packaging, controlling the weight of the packaged glue bag at 35.00+ -0.05 kg, removing impurities, and improving RSS uniformity.
The three crepe control parameters are as follows: the thickness of the first press-crepe is not more than 2cm, and the thickness of the second press-crepe is not more than 1.5cm; the thickness of the third press crepe is not more than 1.2cm.
The WF is treated by the following method: after sawing WF, feeding, cooling after secondary dry stirring, weighing the cooled rubber, controlling the weight of the rubber to be 35.00+/-0.05 kg, pressing the weighed rubber into a hexahedral rubber bag, and then re-weighing, wherein the weight of the rubber bag is controlled to be 35.00+/-0.05 kg.
In a second aspect, the application also provides the acid-resistant natural rubber obtained by the preparation process, and the acid-resistant natural rubber has the following parameters: the tensile strength of the sulfuric acid solution after acidification treatment is more than or equal to 10MPa, the elongation is more than or equal to 600%, the permanent deformation is less than or equal to 10%, and the acid resistance is high.
In a third aspect, the application also provides application of the natural rubber in manufacturing rubber products for aerospace.
The application is characterized in that: the application mainly adopts three raw materials of WF, SCR10 and RSS (first grade tobacco flake) to prepare the product with high acid resistance, and the advantages of the raw materials are as follows: the WF has the advantages of low impurity content, good plasticity retention rate, good elongation at break and scorching time, good SCR No. 10 dominant stretching and permanent deformation, and good RSS (tobacco flake) dominant in plastic initial value, high plasticity retention rate and good tensile strength; finally, the advantages of each raw material are utilized by optimizing the proportion and controlling the operation process, and the aviation tire product meeting the high requirement of comprehensive performance is produced after mixing.
Compared with the prior art, the application has the following beneficial effects: the rubber product prepared by the method has the advantages of consistent appearance, no clamping and physical performance index meeting the requirements of aerospace tires; has particular advantages in strong acid resistance compared with other products.
Detailed Description
The following describes the technical scheme of the present application in further detail with reference to specific examples, but the present application is not limited to the following technical scheme. The rubber materials SCR10, RSS and WF used in the following examples were all derived from Xishuangbanna middling rubber Co.
Example 1
Proportioning SCR10 and RSS, wherein the SCR10 accounts for 65 parts by weight and the RSS accounts for 35 parts by weight; sawing the two raw materials, feeding, stirring, cooling, and entering the next procedure. The dry stirring is carried out in two times, the dry stirring extrusion temperature is not more than 130 ℃, and the cooling temperature is not more than 60 ℃. Weighing the dry stirred and cooled sizing material, wherein the weight of the sizing material is controlled to be 35.00+/-0.05 kg, pressing the weighed sizing material into a cuboid rubber bag, and then re-weighing, wherein the weight of the rubber bag is controlled to be 35.00+/-0.05 kg;
quality inspection procedure: diagonally sampling the rubber bags for spot inspection, wherein the sampling amount is 150+/-5 g, detecting the quality of rubber temperature, foreign matters, white spots, appearance, plastic initial value, plastic retention rate and Mooney viscosity, detecting the metal of all the rubber bags, and removing unqualified products.
Example 2
Proportioning SCR10, RSS and WF, wherein the SCR10 accounts for 50 parts, the RSS accounts for 30 parts and the WF20 parts; the three raw material glue is sawed and then fed, and the next procedure is carried out after dry stirring and cooling, wherein the dry stirring is carried out twice, the dry stirring extrusion temperature is not more than 130 ℃, and the cooling temperature is not more than 60 ℃. Weighing the dry stirred and cooled sizing material, wherein the weight of the sizing material is controlled to be 35.00+/-0.05 kg, pressing the weighed sizing material into a cuboid rubber bag, and then re-weighing, wherein the weight of the rubber bag is controlled to be 35.00+/-0.05 kg;
quality inspection procedure: diagonally sampling the rubber bags for spot inspection, wherein the sampling amount is 150+/-5 g, detecting the quality of rubber temperature, foreign matters, white spots, appearance, plastic initial value, plastic retention rate and Mooney viscosity, detecting the metal of all the rubber bags, and removing unqualified products.
The rubber products obtained in example 1 and example 2 were subjected to performance tests, and the test criteria are shown in Table 1.
Table 1 technical requirement parameters
Since elongation, tensile strength and permanent set are three important indexes of acid-resistant rubber, and other indexes can be generally satisfied, the examples only give data of the three indexes, and the results are shown in table 2.
Tensile strength detection: according to concentrated sulfuric acid: water = 2500ml:700ml of sulfuric acid solution is prepared, and the obtained rubber product is soaked at 60-70 ℃ for 7-9min, and the tensile strength, the elongation and the permanent deformation are detected according to a standard and specified method after acid treatment.
Table 2 results of the tests of example 1 and example 2
The physical property index of the rubber product for preparing the aerospace tire requires that the extensibility is more than or equal to 600 percent; the tensile strength is more than or equal to 10MPa; permanent deformation is less than or equal to 10 percent. As is clear from Table 1, the rubber products obtained in example 1 and example 2 were unsatisfactory. The insufficient ratio of WF and RSS formulations when the formulation design is not in line with the main reasons leads to the elongation rate not reaching the index requirement of 600%.
Example 3
WF is pretreated and then is fed, and the pretreatment method is as follows: after sawing, feeding, cooling after secondary dry stirring, weighing the cooled sizing material, controlling the weight of the sizing material to be 35.00+/-0.05 kg, pressing the weighed sizing material into a hexahedral glue bag, and then re-weighing, wherein the weight of the glue bag is controlled to be 35.00+/-0.05 kg. The two dry stirring extrusion temperature is not more than 130 ℃, the cooling temperature is not more than 60 ℃, the WF P after treatment is 40-50%, PRI is 75-90%, mooney viscosity is 80-100%, and impurity content is 0.01-0.05%.
Proportioning 40 parts of SCR10, 30 parts of RSS and 30 parts of WF (WF) in parts by weight; the three raw material glue is sawed and then fed, and the next procedure is carried out after dry stirring and cooling, wherein the dry stirring is carried out twice, the dry stirring extrusion temperature is not more than 130 ℃, and the cooling temperature is not more than 60 ℃. Weighing the dry stirred and cooled sizing material, wherein the weight of the sizing material is controlled to be 35.00+/-0.05 kg, pressing the weighed sizing material into a cuboid rubber bag, and then re-weighing, wherein the weight of the rubber bag is controlled to be 35.00+/-0.05 kg;
quality inspection procedure: diagonally sampling the rubber bags for spot inspection, wherein the sampling amount is 150+/-5 g, detecting the quality of rubber temperature, foreign matters, white spots, appearance, plastic initial value, plastic retention rate and Mooney viscosity, detecting the metal of all the rubber bags, and removing unqualified products.
Example 4
WF is pretreated and then is fed, and the pretreatment method is as follows: after sawing, feeding, cooling after secondary dry stirring, weighing the cooled sizing material, controlling the weight of the sizing material to be 35.00+/-0.05 kg, pressing the weighed sizing material into a hexahedral glue bag, and then re-weighing, wherein the weight of the glue bag is controlled to be 35.00+/-0.05 kg. The two dry stirring extrusion temperatures are not more than 130 ℃, and the cooling temperature is not more than 60 ℃.
The RSS is preprocessed by the following method: adding RSS raw material glue into a feeding pool, picking out visible foreign matters, then crushing the raw material glue in a glue crusher until glue blocks with the diameters below 20cm enter a mixing pool for foreign matter sorting, feeding the glue blocks from the mixing pool into a wet stirrer for squeezing and washing the glue blocks with the diameters below 15cm, mixing, and controlling the diameters of the squeezed and washed glue materials within 5cm by single rolling and kneading; the mixture is creped for three times, wherein the thickness of the first crepe is not more than 2cm, and the thickness of the second crepe is not more than 1.5cm; the thickness of the third press crepe is not more than 1.2cm. After crumpling, tearing the grains to 0.7cm, filling the grains into a box, dripping water, drying at 70-90 ℃ for 460-500s, controlling the dripping time within 15-120 min, controlling the discharging glue temperature within 50 ℃, weighing and packaging, and controlling the weight of the box filling glue bag to 35.00+/-0.05 kg.
The SCR10, RSS and WF employed in this embodiment all meet the following requirements: p0-50%, PRI 75-90%, mooney viscosity 80-100%, and impurity content 0.01-0.05%.
Proportioning and preparing the treated SCR10, the RSS and the treated WF, wherein the SCR10 accounts for 45 parts, the RSS accounts for 25 parts and the WF accounts for 30 parts by weight; the three raw material glue is sawed and then fed, and the next procedure is carried out after dry stirring and cooling, wherein the dry stirring is carried out twice, the dry stirring extrusion temperature is not more than 130 ℃, and the cooling temperature is not more than 60 ℃. Weighing the dry stirred and cooled sizing material, wherein the weight of the sizing material is controlled to be 35.00+/-0.05 kg, pressing the weighed sizing material into a cuboid rubber bag, and then re-weighing, wherein the weight of the rubber bag is controlled to be 35.00+/-0.05 kg;
quality inspection procedure: diagonally sampling the rubber bags for spot inspection, wherein the sampling amount is 150+/-5 g, detecting the quality of rubber temperature, foreign matters, white spots, appearance, plastic initial value, plastic retention rate and Mooney viscosity, detecting the metal of all the rubber bags, and removing unqualified products.
The rubber products obtained in example 3 and example 4 were examined, and the results are shown in Table 3.
Table 3 results of the tests of example 3 and example 4
As can be seen from Table 3, the various indices of example 4 meet the requirements of the aerospace tire for rubber products. As all performance indexes meet the requirements after the sulfuric acid solution is treated, the rubber product has special advantages in the aspect of strong acid resistance. Example 3, although the median was satisfactory, the elongation was measured three times and was found to be less than 600% at a time during the test, which was not satisfactory. In the embodiment 3, the elongation rate is detected to be fluctuated, the condition of substandard occurrence is considered, the quality of the RSS of the raw materials of different batches is different in consideration of different production batches, and the specific treatment is needed to improve the quality uniformity so as to ensure that the elongation rate meets the requirement.
Example 5
Based on example 4, the ratio of the raw rubber was further optimized, SCR10 was 43 parts, RSS was 27.5 parts, and WF was 29.5 parts, and the obtained rubber products were examined, and the results are shown in Table 4.
TABLE 4 example 5 detection results
As can be seen from Table 4, the indexes of the rubber product meet the requirements of the aerospace tire on the rubber product, and the rubber product prepared by the method has special advantages in the aspect of strong acid resistance because the performance of the rubber product is detected after being treated by strong acid and the performance of the rubber product reaches the standard, and the rubber product can be used for preparing the aerospace rubber product.
The foregoing disclosure is merely illustrative of the preferred embodiments of the present application and is not intended to limit the scope of the claims herein, as equivalent variations of the claims herein will fall within the scope of the application.
Claims (4)
1. The preparation process of the acid-resistant natural rubber is characterized in that the acid-resistant natural rubber is used for manufacturing rubber products for aerospace;
the technological operation process is as follows: matching the WF, the SCR10 and the primary RSS, wherein the WF accounts for 25-30 parts by weight, the SCR10 accounts for 40-45 parts by weight, and the primary RSS accounts for 25-30 parts by weight; sawing the three raw material adhesives, feeding the materials according to a proportion, and entering the next working procedure after dry stirring and cooling;
the dry stirring is carried out twice, the dry stirring extrusion temperature is not more than 130 ℃, and the cooling temperature is not more than 60 ℃;
the primary RSS is preprocessed by the following method: adding primary RSS raw material glue into a feeding pool, picking out visible foreign matters, then crushing the raw material glue in a rubber crusher until rubber blocks with the diameters below 20cm enter a mixing pool for foreign matter sorting, feeding the rubber blocks from the mixing pool into a wet stirrer for squeezing and washing until the rubber blocks with the diameters below 15cm are mixed, and controlling the diameters of the squeezed and washed rubber materials to be within 5cm for remixing; mixing, pressing for three times, tearing to 0.7cm, packaging, dripping, drying at 70-90deg.C for 460-500s, controlling the temperature of the discharged glue to be within 50deg.C, weighing, packaging, and packaging with weight of 35.00+ -0.05 kg;
the thickness of the first press-crepe is not more than 2cm, and the thickness of the second press-crepe is not more than 1.5cm; the thickness of the third press crepe is not more than 1.2cm;
the WF is pretreated by the following method: WF is subjected to sawing, then charging, secondary dry stirring and cooling, the cooled sizing material is weighed, the weight of the sizing material is controlled to be 35.00+/-0.05 kg, the weighed sizing material is pressed into a hexahedral sizing bag, and then re-weighing is performed, wherein the weight of the sizing bag is controlled to be 35.00+/-0.05 kg; the WF, SCR10 and primary RSS meet the following requirements: p0-50%, PRI 75-90%, mooney viscosity 80-100%, and impurity content 0.01-0.05%.
2. The process for preparing an acid-resistant natural rubber according to claim 1, further comprising: weighing and packing procedures and quality inspection procedures;
weighing and packaging: weighing the dry stirred and cooled sizing material, wherein the weight of the sizing material is controlled to be 35.00+/-0.05 kg, pressing the weighed sizing material into a cuboid rubber bag, and then re-weighing, wherein the weight of the rubber bag is controlled to be 35.00+/-0.05 kg;
quality inspection procedure: diagonally sampling the rubber bags for spot inspection, wherein the sampling amount is 150+/-5 g, detecting the quality of rubber temperature, foreign matters, white spots, appearance, plastic initial value, plastic retention rate and Mooney viscosity, detecting the metal of all the rubber bags, and removing unqualified products.
3. An acid-resistant natural rubber obtained by the preparation process according to claim 1, wherein the parameters of the acid-resistant natural rubber are as follows: the tensile strength is more than or equal to 10MPa, the elongation is more than or equal to 600 percent, and the permanent deformation is less than or equal to 10 percent after the sulfuric acid solution is acidified.
4. Use of the acid-resistant natural rubber of claim 3 in the manufacture of rubber products for aerospace.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106514901A (en) * | 2016-11-08 | 2017-03-22 | 湛江市伟达机械实业有限公司 | Natural rubber primary machining process |
| CN108586638A (en) * | 2018-03-30 | 2018-09-28 | 云南滇源橡胶有限公司 | A kind of smoked sheet grade rubber |
| CN109867735A (en) * | 2017-12-05 | 2019-06-11 | 西双版纳中化橡胶有限公司 | It is a kind of to prepare follow-on waterline natural rubber with constant viscosity processing technology and system |
| CN114773694A (en) * | 2022-04-21 | 2022-07-22 | 西双版纳曼列橡胶有限公司 | Preparation method of TSR9710 modified rubber |
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- 2022-09-06 CN CN202211082050.XA patent/CN115368647B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106514901A (en) * | 2016-11-08 | 2017-03-22 | 湛江市伟达机械实业有限公司 | Natural rubber primary machining process |
| CN109867735A (en) * | 2017-12-05 | 2019-06-11 | 西双版纳中化橡胶有限公司 | It is a kind of to prepare follow-on waterline natural rubber with constant viscosity processing technology and system |
| CN108586638A (en) * | 2018-03-30 | 2018-09-28 | 云南滇源橡胶有限公司 | A kind of smoked sheet grade rubber |
| CN114773694A (en) * | 2022-04-21 | 2022-07-22 | 西双版纳曼列橡胶有限公司 | Preparation method of TSR9710 modified rubber |
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