CN112375276A - High-resistance matte sealing strip and preparation method thereof - Google Patents
High-resistance matte sealing strip and preparation method thereof Download PDFInfo
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- 238000007789 sealing Methods 0.000 title claims abstract description 100
- 238000002360 preparation method Methods 0.000 title abstract description 34
- 229920001971 elastomer Polymers 0.000 claims abstract description 60
- 239000000463 material Substances 0.000 claims abstract description 45
- 239000006229 carbon black Substances 0.000 claims abstract description 40
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 27
- 239000005662 Paraffin oil Substances 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 18
- 239000011347 resin Substances 0.000 claims abstract description 18
- 239000002250 absorbent Substances 0.000 claims abstract description 16
- 230000002745 absorbent Effects 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 16
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 15
- 239000011593 sulfur Substances 0.000 claims abstract description 15
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 12
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 11
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 11
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 11
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 11
- 239000008117 stearic acid Substances 0.000 claims abstract description 11
- 238000004073 vulcanization Methods 0.000 claims description 22
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- 239000011787 zinc oxide Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 238000004513 sizing Methods 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 6
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical class [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 abstract 1
- 230000000704 physical effect Effects 0.000 description 10
- 229920002943 EPDM rubber Polymers 0.000 description 6
- 235000012438 extruded product Nutrition 0.000 description 5
- 230000004913 activation Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000004014 plasticizer Substances 0.000 description 3
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- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 230000036314 physical performance Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012767 functional filler Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010059 sulfur vulcanization Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 239000004636 vulcanized rubber Substances 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
- C08L21/00—Compositions of unspecified rubbers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0855—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using microwave
-
- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- 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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Chemical & Material Sciences (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Toxicology (AREA)
- Sealing Material Composition (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a high-resistance matte sealing strip, and a rubber material for preparing the sealing strip comprises the following raw material components: raw rubber 9097M, activated zinc oxide, stearic acid, polyethylene glycol, a silane coupling agent, resin, carbon black, paraffin oil, a nano reinforcing agent, sulfur, a moisture absorbent and an accelerator. Meanwhile, the invention also provides a preparation method of the high-resistance matte sealing strip. According to the high-resistance matte sealing strip, raw rubber 9097M, carbon black BC1004 and a nano reinforcing agent PF81 are used for carrying out formula design, and the high-resistance matte sealing strip is combined with other ingredients, so that the resistance performance of the sealing strip can be improved on the premise of meeting the material performance of the sealing strip, and the sealing strip has high resistance and matte properties.
Description
Technical Field
The invention relates to the technical field of preparation of sealing products, in particular to a high-resistance matte sealing strip, and meanwhile, the invention also relates to a preparation method of the sealing strip.
Background
The sealing strip is installed on door frame, window frame, cabin, wiper each position such as car, plays waterproof, dustproof and isolated air's sealed effect, is one of important sealed spare part in the car. The sealing strip is generally prepared by taking ethylene propylene diene monomer as a main material and adding materials such as a plasticizer, a filler and the like.
The ethylene propylene diene monomer rubber has the nonpolar characteristic, so that the ethylene propylene diene monomer rubber has good insulativity, but when the ethylene propylene diene monomer rubber is actually used for producing the sealing strip, in order to ensure the strength and other physical property requirements of the sealing strip product, a carbon black material with a large proportion is generally added into a formula, and carbon black aggregates are dispersed in a sizing material to form a conductive channel, so that the insulativity of the sizing material can be greatly reduced.
Due to the addition of the carbon black material in a large proportion, the volume resistivity of the conventional sizing material formula is generally 104-107 omega cm, and the requirement of a high-resistance sealing strip product cannot be met. At this time, if the amount of carbon black is reduced, the performance of the prepared product is at risk, and quality problems such as edge-drawing and hole-forming are easy to occur when the sealing strip product is extruded. Therefore, the current sealing strip rubber formula has the defect that the physical property, the resistance property and the extrusion property are difficult to be simultaneously considered.
Disclosure of Invention
In view of the above, the present invention is directed to a high resistance matte sealing tape, so as to at least improve the resistance performance of the sealing tape.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a high-resistance matt sealing strip is prepared from the following raw material components in parts by weight: raw rubber 9097M: 101-141 parts; active zinc oxide: 3-5 parts; stearic acid: 1-2 parts; polyethylene glycol: 0.5-1.5 parts; silane coupling agent: 1.5-2.5 parts; resin: 1-2 parts; carbon black BC 1004: 70-90 parts; paraffin oil: 40-60 parts; nano reinforcing agent PF 81: 60-80 parts; sulfur: 1-2 parts; moisture absorbent: 6-10 parts; accelerator (b): 2.2-6 parts.
Further, the resin is a resin ST 606.
Further, the paraffin oil is paraffin oil 25110.
Further, the sulfur is sulfur S-80.
Furthermore, the moisture absorbent is a moisture absorbent GR.
Further, the accelerant comprises the following raw materials in parts by weight: accelerator MBT-75: 1-2 parts; accelerator DPTT-70: 0.4-1 part; accelerator TMTD-75: 0.4-1 part; accelerator BZ-75: 0.4-1 part; accelerator ETU-80: 0.4-1 part.
Further, the rubber material comprises the following raw material components in parts by weight: raw rubber 9097M: 121 parts of (1); active zinc oxide: 4 parts of a mixture; stearic acid: 1.5 parts; polyethylene glycol: 1 part; silane coupling agent: 2 parts of (1); resin ST 606: 1.5 parts; carbon black BC 1004: 80 parts of a mixture; paraffin oil 25110: 50 parts of a mixture; nano reinforcing agent PF 81: 70 parts of (B); sulfur: 1.5 parts; moisture absorbent GR: 8 parts of a mixture; accelerator MBT-75: 1.5 parts; accelerator DPTT-70: 0.7 part; accelerator TMTD-75: 0.7 part; accelerator BZ-75: 0.7 part; accelerator ETU-80: 0.7 part.
Compared with the prior art, the invention has the following advantages:
according to the sealing strip, the raw rubber 9097M is adopted, and compared with the traditional EPDM raw rubber, the raw rubber 9097M can effectively improve the dispersion of carbon black, so that the surface of the carbon black is wrapped by rubber and resin to form a single dispersion phase, the resistance performance of the sealing strip can be improved, and the insulativity of the sealing strip can be improved.
Meanwhile, the sizing material of the sealing strip adopts the carbon black BC1004 as a reinforcing material, the carbon black BC1004 has a very low surface area and a medium structure, can be filled in a large amount and remarkably improves the volume resistivity so as to ensure the strength of the sealing strip and the physical performance of the product, is favorable for extruding the fineness and the matte characteristic of the surface of the product, and can improve the overall quality of the product.
In addition, the rubber material of the sealing strip adopts the surface activation treatment of the hydroxyl-free nano reinforcing agent PF81 for the filler system, and simultaneously improves the dispersibility of the nano reinforcing agent in the formula by using the silane coupling agent. The nano reinforcing agent PF81 has high purity and stable particle size distribution, and is subjected to surface activation treatment, so that the resistance performance of the sealing strip can be effectively improved.
In conclusion, the raw rubber 9097M, the carbon black BC1004 and the nano reinforcing agent PF81 are used for formulation design and combined with other ingredients, so that the resistance performance of the sealing strip can be improved on the premise of meeting the material performance of the sealing strip, and the sealing strip has the characteristics of high resistance and matte properties.
Meanwhile, the invention also provides a preparation method of the high-resistance matt sealing strip, which comprises the steps of preparing the rubber material by adopting a two-section mixing process, extruding the rubber material by adopting a screw extruder to form the sealing strip, vulcanizing the formed sealing strip by adopting microwave vulcanization and hot air vulcanization, and cooling and cutting the vulcanized sealing strip to obtain the sealing strip product.
Further, before the formed sealing strip is vulcanized, the surface of the sealing strip is subjected to spraying treatment.
Further, microwave vulcanization adopts two segmentation microwave vulcanization stoves, hot-blast vulcanization adopts four segmentation hot-blast vulcanization stoves, the cooling is including the water-cooling and the air-cooled cooling that carry out in proper order.
The sealing strip prepared by the preparation method can meet the material performance of the sealing strip, can improve the resistance performance of the sealing strip, has the matte property, and can ensure that the prepared sealing strip product has better service performance.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The embodiment firstly relates to a high-resistance matt sealing strip, and in the overall design, the sizing material for preparing the sealing strip comprises the following raw material components in parts by weight: raw rubber 9097M: 101-141 parts; active zinc oxide: 3-5 parts; stearic acid: 1-2 parts; polyethylene glycol: 0.5-1.5 parts; silane coupling agent: 1.5-2.5 parts; resin: 1-2 parts; carbon black BC 1004: 70-90 parts; paraffin oil: 40-60 parts; nano reinforcing agent PF 81: 60-80 parts; sulfur: 1-2 parts; moisture absorbent: 6-10 parts; accelerator (b): 2.2-6 parts.
In the raw material formula of the sealing strip rubber material, raw rubber 9097M adopts raw rubber raw materials purchased from Mitsui chemistry, and compared with the traditional EPDM raw rubber, the raw rubber 9097M is produced by adopting a blending technology and forms Eptalloy. The Eptalloy can effectively improve the dispersibility of raw rubber and the surface smoothness of an extruded product, and can also effectively improve the dispersibility of carbon black, so that the surface of the carbon black is wrapped by rubber and resin to form a single dispersed phase, thereby improving the insulativity of the prepared rubber material.
In specific implementation, the parts of the raw rubber 9097M can be, for example, 101 parts, 105 parts, 110 parts, 115 parts, 120 parts, 130 parts, 135 parts, 140 parts or 141 parts.
In the embodiment, carbon black BC1004 is used as a reinforcing agent, the particle size and the structure of the carbon black are key factors influencing the resistivity of the rubber compound in the rubber compound, and the carbon black BC1004 is used as high-resistance carbon black which has very low surface area and medium structure, can be filled in a large amount and remarkably improve the volume resistivity, ensures the strength of the rubber compound and the physical properties of the product, is beneficial to extruding the fineness and the sub-luminosity of the surface of the product, and can improve the integral taste of the product.
In particular, the carbon black BC1004 may be used in an amount of, for example, 70 parts, 72 parts, 75 parts, 78 parts, 80 parts, 85 parts, or 90 parts.
The plasticizer mainly plays a role in adjusting the viscosity of the rubber material in the formula of the rubber material and improves the processability of the rubber in the mixing process. The paraffin oil 25110 is specifically adopted as the paraffin oil, and the high-viscosity and high-flash-point paraffin oil is used as a plasticizer in the formula, so that the mixing processability of rubber materials can be improved, and meanwhile, the high-flash-point paraffin oil can also avoid the precipitation of low-molecular substances in the vulcanization process, and further, the generation of harmful substances can be effectively reduced.
In particular, the paraffin oil 25110 may be used in an amount of, for example, 40 parts, 42 parts, 45 parts, 50 parts, 55 parts, 57 parts, or 60 parts.
The embodiment adopts the nanometer reinforcing agent PF81 of desorption hydroxyl surface activation processing through making the filler system, and this nanometer reinforcing agent PF81 is refined by high whiteness natural composite mineral raw materials and is processed to form, and it has unified chemical purity and stable particle size distribution, and most particle size distribution is at the nanometer level, also passes through surface activation processing simultaneously, and it has the dispersion well as reinforcement height as reinforcement functional filler, and the insulation is good, and the resilience is good, characteristics such as whiteness degree height, can effectively promote the performance of sealing strip.
In specific implementation, the nano reinforcing agent PF81 may be, for example, 60 parts, 62 parts, 65 parts, 68 parts, 70 parts, 72 parts, 75 parts, or 80 parts.
The sealing strip of this embodiment is prepared by using a common sulfur vulcanization system, wherein sulfur is sulfur S-80, and the moisture absorbent is moisture absorbent GR. The accelerant also comprises the following raw materials in parts by weight: accelerator MBT-75: 1-2 parts; accelerator DPTT-70: 0.4-1 part; accelerator TMTD-75: 0.4-1 part; accelerator BZ-75: 0.4-1 part; accelerator ETU-80: 0.4-1 part.
In particular, the amount of sulfur S-80 may be, for example, 1 part, 1.2 parts, 1.5 parts, 1.8 parts or 2 parts. The amount of the moisture absorbent GR may be 6 parts, 7 parts, 8 parts, 9 parts, or 10 parts, for example.
The accelerator MBT-75 can be used, for example, in 1 part, 1.2 parts, 1.5 parts, 1.8 parts, or 2 parts. The accelerator DPTT-70 may be, for example, 0.4 parts, 0.5 parts, 0.6 parts, 0.8 parts, or 1 part. The portion of the accelerator TMTD-75 may be, for example, 0.4 part, 0.5 part, 0.6 part, 0.8 part or 1 part. The accelerator BZ-75 may be used in an amount of, for example, 0.4 part, 0.5 part, 0.6 part, 0.8 part or 1 part. The accelerator ETU-80 can be present in, for example, 0.4 part, 0.5 part, 0.6 part, 0.8 part, or 1 part.
In addition, in the embodiment, stearic acid and active zinc oxide are added in the formula as the active agents, so that the activity of the accelerator and the vulcanization speed of the rubber compound can be improved. By adding polyethylene glycol as a dispersing agent in the formula, the carbon black dispersibility of the rubber material in the mixing process can be well improved, and the uniformity of the rubber material is improved.
In particular, the stearic acid may be used in an amount of, for example, 1 part, 1.2 parts, 1.5 parts, 1.6 parts, 1.8 parts or 2 parts. The portion of the active zinc oxide may be, for example, 3 parts, 3.5 parts, 4 parts, 4.5 parts, or 5 parts. The part of polyethylene glycol may be, for example, 0.5 parts, 0.8 parts, 1 part, 1.2 parts, 1.3 parts, or 1.5 parts.
In addition, in the embodiment, by adding a certain part of silane coupling agent, the dispersibility of the adopted nano inorganic material can be effectively improved. In addition, the resin ST606 is specifically adopted in the resin of the embodiment, and the strength of the sizing material and the adhesion with the steel belt when the sealing strip is prepared by the sizing material ST606 can be effectively improved.
In particular, the silane coupling agent may be used in an amount of, for example, 1.5 parts, 1.8 parts, 2 parts, 2.2 parts, 2.4 parts, or 2.5 parts. The parts of the resin ST606 may be, for example, 1 part, 1.2 parts, 1.5 parts, 1.6 parts, 1.8 parts, or 2 parts.
Based on the above description, the rubber material of the sealing strip of the embodiment is formulated by using the raw rubber 9097M, the carbon black BC1004 and the nano reinforcing agent PF81, and is combined with other ingredients, so that the resistance performance of the sealing strip can be improved on the premise of meeting the material performance of the sealing strip, and the sealing strip has high resistance and sub-gloss characteristics.
The sealing strip of the embodiment can be applied to various waterproof and dustproof sealing products at positions such as door frames, window frames, engine rooms and windscreen wipers of automobiles, and meanwhile, besides being used on automobiles, the sealing strip of the embodiment can also be used for other related products in occasions needing sealing by adopting the sealing strip.
In addition, when the sealing strip of the embodiment is manufactured, the manufacturing method generally includes preparing the rubber material by a two-stage mixing process, extruding the rubber material into the sealing strip by using a screw extruder, vulcanizing the molded sealing strip by using microwave vulcanization and hot air vulcanization, and cutting the vulcanized sealing strip after cooling to obtain the sealing strip product.
The two-stage mixing process can be realized by adopting the conventional production process, and generally comprises the following process steps:
first-stage mixing: preparing small materials → preparing raw rubber and raw materials → banburying by an internal mixer → mixing by an open mill → discharging pieces → cooling → parking;
and (3) second-stage mixing: accelerator preparation → sizing material internal mixing → mixing of an open mill → strip discharging → cooling → inspection → parking.
The screw extruder can be realized by adopting the existing equipment meeting the design requirement of the product, and usually, when vulcanization is carried out, a two-section type microwave vulcanization furnace can be generally adopted for microwave vulcanization, and the microwave power can be respectively 3.5 +/-1.0 KW/3.0 +/-1.0 KW. The hot air vulcanization can adopt a four-section type hot air vulcanization furnace, and the vulcanization temperature can be respectively 250 +/-10 ℃/240 +/-10 ℃.
The cooling can be performed by using two modes of water cooling and air drying in sequence. The cutting machine is used for cutting the product according to the using size.
In addition, this embodiment still can set up before vulcanizing the fashioned sealing strip and carry out spray finishing to the sealing strip surface to make the sealing strip surface smooth and improve its wearability, the coating of spraying select according to the design demand alright.
The sealing tape of the present embodiment will be further described below by taking the preparation of the sealing tape as an example.
Preparation example 1
The rubber material adopted by the sealing strip of the preparation example comprises the following raw material components in parts by weight: raw rubber 9097M: 121 parts of (1); active zinc oxide: 4 parts of a mixture; stearic acid: 1.5 parts; polyethylene glycol: 1 part; silane coupling agent: 2 parts of (1); resin ST 606: 1.5 parts; carbon black BC 1004: 80 parts of a mixture; paraffin oil 25110: 50 parts of a mixture; nano reinforcing agent PF 81: 70 parts of (B); sulfur: 1.5 parts; moisture absorbent GR: 8 parts of a mixture; accelerator MBT-75: 1.5 parts; accelerator DPTT-70: 0.7 part; accelerator TMTD-75: 0.7 part; accelerator BZ-75: 0.7 part; accelerator ETU-80: 0.7 part.
The rubber material ingredient is used for preparing the sealing strip according to the preparation method, and the process parameters in the preparation are determined by referring to the conventional production process.
Preparation example 2
The rubber material adopted by the sealing strip of the preparation example comprises the following raw material components in parts by weight: raw rubber 9097M: 121 parts of (1); active zinc oxide: 3 parts of a mixture; stearic acid: 1 part; polyethylene glycol: 1 part; silane coupling agent: 2 parts of (1); resin ST 606: 1 part; carbon black BC 1004: 110 parts of (A); paraffin oil 25110: 60 parts; nano reinforcing agent PF 81: 60 parts; sulfur: 1.3 parts; moisture absorbent GR: 8 parts of a mixture; accelerator MBT-75: 1.5 parts; accelerator DPTT-70: 0.7 part; accelerator TMTD-75: 0.7 part; accelerator BZ-75: 0.7 part; accelerator ETU-80: 0.6 part.
The rubber material ingredient is used for preparing the sealing strip according to the preparation method, and the process parameters in the preparation are the same with the existing conventional production process.
Preparation example 3
The rubber material adopted by the sealing strip of the preparation example comprises the following raw material components in parts by weight: raw rubber 9097M: 121 parts of (1); active zinc oxide: 3 parts of a mixture; stearic acid: 1 part; polyethylene glycol: 1 part; silane coupling agent: 2 parts of (1); resin ST 606: 1 part; carbon black BC 1004: 70 parts of (B); paraffin oil 25110: 46 parts of (a); nano reinforcing agent PF 81: 90 parts of a mixture; sulfur: 1.3 parts; moisture absorbent GR: 8 parts of a mixture; accelerator MBT-75: 1.5 parts; accelerator DPTT-70: 0.7 part; accelerator TMTD-75: 0.7 part; accelerator BZ-75: 0.7 part; accelerator ETU-80: 0.6 part.
The rubber material ingredient is used for preparing the sealing strip according to the preparation method, and the process parameters in the preparation are the same with the existing conventional production process.
With respect to the sealing strip products prepared in the three preparation examples, the tensile strength, the elongation at break and the like in the physical properties of the material are evaluated according to GB/T528-2009 determination of tensile stress strain performance of vulcanized rubber or thermoplastic rubber. The resistance performance of the material is evaluated according to GB/T1410-2006 volume resistivity and surface resistivity test method of solid insulating materials. The gloss was evaluated using a gloss meter.
Wherein, in the evaluation, the standard tensile strength is required to be more than or equal to 7.0Mpa, the elongation at break is required to be more than or equal to 250 percent, and the volume resistivity is required to be more than or equal to 109Omega cm, the requirement of glossiness is less than or equal to 2.5 GU.
The performances of the sealing strips prepared in the three preparation examples are detected, and specific detection results are shown in the following table 1.
TABLE 1 test results of sealing strip Properties
| Test item | Preparation example 1 | Preparation example 2 | Preparation example 3 |
| hardness/A | 72 | 70 | 69 |
| Tensile strength/MPa | 8.72 | 9.58 | 7.36 |
| Elongation at break/%) | 379 | 386 | 362 |
| gloss/GU | 2.1 | 3.1 | 1.8 |
| Volume resistivity/Ω cm | 2.4*1013 | 3.6*108 | 7.3*1013 |
| Extrudability | OK | OK | NG |
As can be seen from the above table, for preparation example 1, 121 parts of raw rubber, 80 parts of carbon black, 52 parts of paraffin oil, and 80 parts of nano reinforcing agent. From the viewpoint of physical properties, the tensile strength and the elongation at break satisfy the target requirements at intermediate levels of production examples 2 and 3. From the viewpoint of resistance property and gloss, the volume resistivity was 2.4 x 1013Omega cm, meets the requirements, has the glossiness of 2.3GU, meets the target requirements, and has no problem in extruded products.
For preparation example 2, 121 parts of raw rubber, 110 parts of carbon black, 60 parts of paraffin oil and 60 parts of nano reinforcing agent. From the viewpoint of physical properties, tensile strength and elongation at break satisfy the target requirements. From the viewpoint of resistance property and gloss, the volume resistivity was 3.6 x 108Omega cm, can not meet the requirements, the glossiness is 3.1GU, and the target requirements can not be met.
For preparation example 3, 121 parts of raw rubber, 70 parts of carbon black, 46 parts of paraffin oil and 90 parts of nano reinforcing agent. From the viewpoint of physical properties, tensile strength and elongation at break satisfied the target requirements, but were significantly lower than those of preparation example 2. From the viewpoint of resistance property and gloss, the volume resistivity was 7.3 x 1013Omega cm, meets the requirement, has the glossiness of 1.8GU, and meets the target requirement. But the extrusion property is poor, and after the extrusion is actually carried out, the problems of edge drawing, hole forming and the like of the extruded product occur.
Therefore, on the basis of adopting raw rubber 9097M, the proportion of carbon black and inorganic filler which mainly influences the resistance and the matte performance in the formula of the sealing strip rubber material is adopted. The larger the proportion of carbon black, the smaller the electrical resistance, the brighter the appearance, the larger the gloss, the larger the proportion of filler, the larger the electrical resistance, and the smaller the matte gloss of the appearance.
In preparation example 3, the carbon black ratio was large, and the physical properties were optimum because of excellent reinforcing properties of the carbon black, but the electrical resistance and the gloss were not satisfactory. In preparation example 2, the amount of carbon black is reduced, the amount of the nano reinforcing agent is increased, the resistance performance is obviously improved, and the glossiness is obviously reduced, but the physical performance is reduced to some extent because the reinforcing performance of the nano reinforcing agent is lower than that of the carbon black, and the problem of edge-drawing and hole-forming of an extruded product is solved. The carbon black and the nano reinforcing agent in the preparation example 1 are used in the middle positions of the preparation examples 2 and 3, the physical properties, the resistance property, the glossiness and the like of the carbon black and the nano reinforcing agent meet the requirements, the extruded product has no problems, and the comprehensive performance is optimal.
In the embodiment, by using the raw rubber 9097M, the carbon black BC1004 and the nano reinforcing agent PF81 for formulation design and combining with other ingredients, on the premise of meeting the physical properties of the sealing strip, the resistance performance of the sealing strip can be improved, and the sealing strip has high resistance and matte properties, so that the use requirement of the high-resistance matte sealing strip can be met.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The high-resistance matte sealing strip is characterized in that a sizing material for preparing the sealing strip comprises the following raw material components in parts by weight: raw rubber 9097M: 101-141 parts; active zinc oxide: 3-5 parts; stearic acid: 1-2 parts; polyethylene glycol: 0.5-1.5 parts; silane coupling agent: 1.5-2.5 parts; resin: 1-2 parts; carbon black BC 1004: 70-90 parts; paraffin oil: 40-60 parts; nano reinforcing agent PF 81: 60-80 parts; sulfur: 1-2 parts; moisture absorbent: 6-10 parts; accelerator (b): 2.2-6 parts.
2. The high resistance matt sealing strip according to claim 1, wherein: the resin is a resin ST 606.
3. The high resistance matt sealing strip according to claim 2, wherein: the paraffin oil is paraffin oil 25110.
4. The high resistance matt sealing strip according to claim 3, wherein: the sulfur is S-80.
5. The high resistance matt sealing strip according to claim 4, wherein: the moisture absorbent is a moisture absorbent GR.
6. The high resistance matt sealing strip according to claim 5, wherein: the accelerant comprises the following raw materials in parts by weight: accelerator MBT-75: 1-2 parts; accelerator DPTT-70: 0.4-1 part; accelerator TMTD-75: 0.4-1 part; accelerator BZ-75: 0.4-1 part; accelerator ETU-80: 0.4-1 part.
7. The high resistance matt sealing strip according to claim 6, wherein: the rubber material comprises the following raw material components in parts by weight: raw rubber 9097M: 121 parts of (1); active zinc oxide: 4 parts of a mixture; stearic acid: 1.5 parts; polyethylene glycol: 1 part; silane coupling agent: 2 parts of (1); resin ST 606: 1.5 parts; carbon black BC 1004: 80 parts of a mixture; paraffin oil 25110: 50 parts of a mixture; nano reinforcing agent PF 81: 70 parts of (B); sulfur: 1.5 parts; moisture absorbent GR: 8 parts of a mixture; accelerator MBT-75: 1.5 parts; accelerator DPTT-70: 0.7 part; accelerator TMTD-75: 0.7 part; accelerator BZ-75: 0.7 part; accelerator ETU-80: 0.7 part.
8. The production method of the sealing tape according to any one of claims 1 to 7, wherein: the method comprises the steps of preparing the rubber material by adopting a two-stage mixing process, extruding the rubber material into a sealing strip by adopting a screw extruder, vulcanizing the molded sealing strip by adopting microwave vulcanization and hot air vulcanization, and cutting the vulcanized sealing strip after cooling to obtain a sealing strip product.
9. The method for producing a sealing tape according to claim 8, wherein: and before vulcanizing the formed sealing strip, spraying the surface of the sealing strip.
10. The method for producing a sealing tape according to claim 8, wherein: the microwave vulcanization adopts a two-section type microwave vulcanization furnace, the hot air vulcanization adopts a four-section type hot air vulcanization furnace, and the cooling comprises water cooling and air cooling which are sequentially carried out.
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Application publication date: 20210219 |