CN107880411B - Micro-foaming environment-friendly lawn particles - Google Patents
Micro-foaming environment-friendly lawn particles Download PDFInfo
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- CN107880411B CN107880411B CN201610861860.3A CN201610861860A CN107880411B CN 107880411 B CN107880411 B CN 107880411B CN 201610861860 A CN201610861860 A CN 201610861860A CN 107880411 B CN107880411 B CN 107880411B
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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
- 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
- C08L23/26—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment
- C08L23/28—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment by reaction with halogens or compounds containing halogen
- C08L23/286—Chlorinated polyethylene
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- 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
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- 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
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
- C08J3/246—Intercrosslinking of at least two polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/28—Treatment by wave energy or particle radiation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/06—CO2, N2 or noble gases
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/26—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment
- C08J2323/28—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment by reaction with halogens or halogen-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/16—Ethene-propene or ethene-propene-diene copolymers
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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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
- C08L2312/00—Crosslinking
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Abstract
The invention provides a preparation method of micro-foaming lawn particles, which comprises the following formula of 100 parts of raw rubber, 20-150 parts of filler, 0-20 parts of plasticizer, 0-6 parts of activator, 1-5 parts of anti-aging agent, 0-5 parts of vulcanizing agent, 0-6 parts of accelerator and 1-8 parts of coloring agent. The preparation method comprises the following production steps: (1) putting raw rubber into an internal mixer according to the proportion, sequentially adding a filler, a plasticizer, an anti-aging agent and the like, uniformly mixing, discharging, and discharging to obtain master batch; (2) putting the slices into an extruder to be extruded into strips, vulcanizing the strips in a high-temperature drying tunnel or performing radiation crosslinking, then granulating the strips, and putting the granules into a foaming device to perform supercritical foaming to prepare the micro-foaming environment-friendly lawn granules. The lawn particles provided by the invention are light in weight, high in strength, non-toxic and environment-friendly, and have the characteristics of being not easy to fall off and long in service life.
Description
Technical Field
The invention belongs to the field of high polymer materials, and particularly relates to a formula and a preparation method of micro-foaming environment-friendly lawn particles filled in an artificial lawn.
Background
The artificial lawn is a simulated lawn made of non-living plastic chemical fiber products by an artificial method. The artificial turf is widely used in the fields of special games of hockey, baseball and rugby, public practice grounds for sports such as football, tennis and golf, and as a ground pavement for beautifying the indoor environment. The rubber particles are positioned under the artificial turf to serve as a stress layer, so that the impact of the field on knees of people when the people move on the field is buffered, the granular rubber can increase the friction of the turf, and in addition, the maximum performance characteristic of the rubber particle material is good in water seepage performance and free from the limitation of weather, so that the full utilization of the turf is facilitated. At present, rubber particles for artificial lawns at home and abroad, especially black waste tire particles, are mainly used at home, and along with the improvement of living standard and the enhancement of environmental awareness of people, the development of an anti-aging and environmental-friendly lawn particle is a development trend of the future market.
The artificial turf particles are mostly chemically crosslinked in a vulcanization mode, and the invention continuously develops a vulcanization method using irradiation crosslinking besides a crosslinking mode using a non-toxic environment-friendly vulcanization system. Compared with chemical crosslinking, the irradiation crosslinking generally does not use catalysts, accelerators, vulcanizing agents and the like, has simple post-treatment, can react at normal temperature and normal pressure, has no pollution, and does not need special equipment except an irradiation source. Are superior to chemical crosslinking in many respects.
Aiming at the future development trend, a method for carrying out microcellular foaming on the lawn particles by taking gases such as nitrogen or carbon dioxide as a physical foaming agent is continuously developed on the basis of the non-toxic environment-friendly rubber particles, so that the micro-foamed environment-friendly artificial lawn particles which are light in weight, high in strength, non-toxic and environment-friendly are prepared.
Disclosure of Invention
The invention aims to provide a micro-foaming environment-friendly artificial turf particle and a preparation method thereof, aiming at the defects of the existing turf particle. The invention takes CM, EPDM, NBR, NR, BR, PE, PVC, EVA, SBS, POE and the like as raw materials, one or more of the raw materials are blended to obtain a novel blend, then proper filler, environment-friendly plasticizer, vulcanizing agent, accelerator, activator, anti-aging agent and the like are added, and after extrusion, vulcanization and granulation, micropore foaming is carried out to obtain the light, high-elastic and environment-friendly artificial lawn particles, which can be widely applied to artificial lawns of gymnasiums, school playgrounds and the like.
In order to achieve the purpose, the invention provides a micro-foaming environment-friendly artificial turf particle and a preparation method thereof.
The artificial turf particles are micro-foaming particles, and a chemical crosslinking-foaming method or an irradiation crosslinking-foaming method is adopted.
Wherein, the formula of the chemical crosslinking-foaming comprises the following components: 100 parts of raw rubber, 30-150 parts of filler, 5-50 parts of plasticizer, 0.1-5 parts of anti-aging agent, 0-5 parts of vulcanizing agent, 0-6 parts of accelerator and 1-6 parts of colorant; wherein the crude rubber is a blend of chlorinated polyethylene rubber (CM) and other rubbers (such as EPDM, NBR, NR, BR), a blend of chlorinated polyethylene rubber and thermoplastics (such as polyethylene, PVC, EVA, SBS, POE, etc.), wherein the CM is 50-100 parts, and the other rubber blends or thermoplastics are 0-50 parts; the filler is one or more of calcium carbonate, kaolin and talcum powder; the plasticizer is any one of paraffin oil and environment-friendly naphthenic oil; the anti-aging agent is one or more of an anti-aging agent Alba, an anti-aging agent BBM and an anti-aging agent W-300; the active agent is one or more of zinc oxide, stearic acid, zinc stearate and polyethylene glycol; the vulcanizing agent is any one of sulfur S or dicumyl peroxide (DCP); the vulcanization accelerator is one or more of DM, TMTD, TAIC, DPTT and BZ; the colorant is one or more of cyanine green G, 5952 pigment green B, 5001 rubber green 2B and 5229 basic piny green lake.
The preparation process comprises the following steps:
(1) setting the temperature of an internal mixer to be 80-120 ℃, setting the rotating speed to be 40-70rpm, putting raw rubber into the internal mixer according to the proportion, sequentially adding filler, plasticizer, anti-aging agent and the like, uniformly discharging after mixing for 5-7min, placing on an open mill, uniformly mixing, feeding slices, standing for 24h, and standing for later use.
(2) Setting the temperature of an extruder to be 70-170 ℃, putting the rubber compound slices into the extruder to extrude rubber strips, then carrying out chemical crosslinking on the rubber strips through a high-temperature drying tunnel, and finally granulating by using a granulator; or after the rubber strip is granulated, the rubber strip is chemically crosslinked through a high-temperature drying tunnel.
(3) And (3) putting the pre-vulcanized particles into a high-pressure reaction kettle, heating, introducing a physical foaming agent to a certain pressure, and quickly releasing pressure after the physical foaming agent is saturated in the pre-vulcanized particles to prepare the non-toxic environment-friendly foamed lawn particles.
(4) And putting the foamed lawn particles into another drying tunnel for secondary vulcanization and shaping.
Wherein, the formula of irradiation crosslinking-foaming is as follows: 100 parts of raw rubber, 30-150 parts of filler, 5-50 parts of plasticizer, 0.1-5 parts of anti-aging agent and 0-6 parts of colorant. Wherein the filler is one or more of calcium carbonate, kaolin and talcum powder; the plasticizer is any one of paraffin oil and naphthenic oil; the anti-aging agent is one or more of an anti-aging agent Alba, an anti-aging agent BBM and an anti-aging agent W-300; the colorant is one or more of cyanine green G, 5952 pigment green B, 5001 rubber green 2B and 5229 basic piny green lake.
The preparation process comprises the following steps:
(1) setting the temperature of an internal mixer to be 80-170 ℃, setting the rotating speed to be 40-70rpm, putting raw rubber into the internal mixer according to the proportion, sequentially adding filler, plasticizer, anti-aging agent and the like, mixing for 5-7min, uniformly discharging, feeding slices, standing for 24h, and standing for later use.
(2) Setting the temperature of an extruder to be 70-170 ℃, putting the rubber compound slices into the extruder to extrude rubber strips, then enabling the rubber strips to pass through an electronic irradiation chamber for irradiation crosslinking, and finally granulating by using a granulator; or granulating the adhesive tape, and performing irradiation crosslinking on the adhesive tape by an electron accelerator irradiator or a cobalt 60 irradiator, wherein the irradiation dose is 5-100 kGy.
(3) And (3) placing the irradiated particles into a high-pressure reaction kettle, heating, introducing a physical foaming agent to a certain pressure, and quickly relieving pressure after the physical foaming agent is saturated in the particles to obtain the micro-foaming lawn particles.
Wherein the crude rubber is a blend of chlorinated polyethylene rubber (CM) and other rubbers (such as EPDM, NBR, NR, BR), and a blend of chlorinated polyethylene rubber and thermoplastics (such as polyethylene, PVC, EVA, SBS, POE, etc.), wherein CM is 50-100 parts, and other rubber blends or thermoplastics are 0-50 parts.
Wherein, in the micropore foaming process in the preparation step (3), the temperature of the reaction kettle is set to be 40-130 ℃, the pressure is 5-30Mpa, the saturation time is 0.5-10h, and the pressure relief time is 10-200 s.
Wherein the physical foaming agent is any one or a mixture of CO2, N2, butane and pentane.
Compared with the prior art, the invention has the following excellent effects:
1. the artificial turf particles have excellent oil resistance, heat resistance, ozone resistance, ultraviolet aging resistance, weather resistance and colorability;
2. the micro-foaming artificial turf particles prepared by the formula and the process have the characteristics of light weight, high strength, no toxicity, environmental protection, no pollution and the like;
3. compared with the existing products, the product has the advantages of light weight, good elasticity, good aging resistance, no toxicity, environmental protection and the like;
4. the artificial turf particles prepared by the formula and the process are not easy to fade.
Detailed Description
Example 1
100 parts of rubber, 50 parts of filler, 5 parts of plasticizer, 1 part of anti-aging agent, 0.7 part of vulcanizing agent, 0.2 part of accelerator, 1.2 parts of activator and 3 parts of colorant; wherein the rubber material is chlorinated polyethylene rubber (CM)/ethylene propylene diene monomer rubber with the ratio of 60/40; the filler is calcium carbonate; the plasticizer is paraffin oil; the anti-aging agent is Alba; the vulcanizing agent is dicumyl peroxide (DCP); the vulcanization accelerator is DM; the activating agent is zinc oxide; the colorant is phthalocyanine green G.
Setting the temperature of an internal mixer to be 90 ℃, putting the chlorinated polyethylene rubber/ethylene propylene diene monomer rubber into the internal mixer according to the proportion, sequentially adding the filler, the plasticizer, the anti-aging agent, the vulcanizing agent, the accelerator, the activator, the colorant and the like, uniformly discharging after mixing for 8min, discharging sheets, and standing for 24h to obtain the rubber compound. And (3) putting the mixed rubber sheet into an extruder, extruding the rubber strip at the temperature of 100 ℃, setting the temperature of a drying tunnel to be 170 ℃ so that the rubber strip is vulcanized in the drying tunnel, cooling and granulating. And then placing the particles into a high-pressure reaction kettle, introducing N2, heating to 70 ℃, pressurizing to 18MPa, after saturation for 3 hours, relieving the pressure, placing the prepared micro-foamed environment-friendly lawn particles into a drying tunnel at 170 ℃ for post vulcanization, finally preparing the micro-foamed particles with the foaming density of 1.05g/cm3, and inspecting and packaging the micro-foamed particles.
Example 2
100 parts of rubber, 80 parts of filler, 10 parts of plasticizer, 1 part of anti-aging agent, 1 part of vulcanizing agent, 1 part of accelerator, 1.2 parts of activator and 6 parts of colorant; wherein the rubber material is chlorinated polyethylene (CM) and the ratio of the chlorinated polyethylene (CM) to the polyethylene is 60/40; the filler is kaolin; the plasticizer is paraffin oil; the anti-aging agent is an anti-aging agent BBM; the vulcanizing agent is dicumyl peroxide (DCP); the vulcanization accelerator is TMTD; the activating agent is zinc oxide; the colorant is 5952 pigment green B.
Setting the temperature of an internal mixer to be 110 ℃, putting chlorinated polyethylene/ethylene vinyl acetate into the internal mixer according to the proportion, sequentially adding filler, plasticizer, anti-aging agent, vulcanizing agent, accelerator, activator, colorant and the like, mixing for 8min, uniformly discharging, discharging sheets, and standing for 24h to obtain the rubber compound. And (2) putting the mixed rubber sheet into an extruder, extruding the rubber strip at the temperature of 120 ℃, setting the temperature of a drying tunnel to be 170 ℃ to vulcanize the rubber strip in the drying tunnel for 10min, cooling at room temperature and granulating, putting the granules into a high-pressure reaction kettle, introducing N2, heating to 100 ℃, pressurizing to 20MPa, saturating for 2h, relieving pressure, putting the prepared micro-foaming lawn granules into a drying tunnel at the temperature of 160 ℃ to vulcanize for 5min, and preparing the micro-foaming lawn granules with the foaming density of 1.09g/cm 3.
Example 3
100 parts of rubber material, 100 parts of filler, 10 parts of plasticizer, 1 part of anti-aging agent and 1.5 parts of dye.
Wherein the rubber material is chlorinated polyethylene/polyethylene, and the mixture ratio is 80/20; the filler is calcium carbonate and kaolin which are used together; the plasticizer is environment-friendly naphthenic oil; the anti-aging agent is anti-aging agent W-300; the colorant was 5001 rubber green 2B.
Setting the temperature of an internal mixer to 130 ℃, putting the chlorinated polyethylene/polyethylene elastomer into the internal mixer, sequentially adding the filler, the plasticizer, the anti-aging agent and the like, controlling the rubber discharge temperature to be lower than 120 ℃, mixing for 8min, discharging and discharging to obtain the rubber compound. And (3) placing the mixed rubber sheet into an extruder, extruding adhesive tapes, performing irradiation crosslinking through an electron accelerator irradiator at the temperature of 120 ℃, cooling at room temperature, granulating, then placing the particles into a high-pressure reaction kettle, introducing N2, heating to 120 ℃, pressurizing to 20MPa, saturating for 2 hours, and relieving pressure to obtain the micro-foaming lawn particles with the foaming density of 1.25g/cm 3.
Example 4
100 parts of rubber material, 80 parts of filler, 7 parts of plasticizer, 1 part of anti-aging agent and 1.5 parts of colorant.
Wherein the rubber material is chlorinated polyethylene/natural rubber, and the mixture ratio is 60/40; the filler is talcum powder; the plasticizer is environment-friendly naphthenic oil; the anti-aging agent is Alba; the colorant was 5229 basic pinkish green lake.
Setting the temperature of an internal mixer to be 90 ℃, putting the chlorinated polyethylene/natural rubber into the internal mixer according to the proportion, sequentially adding the filler, the plasticizer, the anti-aging agent and the like, controlling the rubber discharge temperature to be lower than 120 ℃, mixing for 8min, discharging and discharging to obtain the rubber compound. And (3) placing the mixed rubber sheet into an extruder, extruding a rubber strip at the temperature of 100 ℃, performing irradiation crosslinking on the mixed rubber sheet through an electron accelerator irradiator, wherein the irradiation dose is 50kGy, cooling at room temperature, granulating, then placing the granules into a high-pressure reaction kettle, introducing N2, heating to 80 ℃, pressurizing to 16MPa, saturating for 3 hours, and relieving the pressure to obtain 3 micro-foaming lawn granules with the foaming density of 1.15 g/cm.
The above description is only an embodiment of the present invention, and is not intended to limit the present invention, and all technical solutions obtained by using equivalent substitutions or equivalent transformations fall within the protection scope of the present invention.
Claims (5)
1. A preparation method of micro-foaming environment-friendly lawn particles is characterized in that the micro-foaming environment-friendly lawn particles adopt a chemical crosslinking-foaming method or an irradiation crosslinking-foaming method; the formula of irradiation crosslinking-foaming is as follows: 100 parts of raw rubber, 30-150 parts of filler, 5-50 parts of plasticizer, 0.1-5 parts of anti-aging agent and 0-6 parts of colorant; wherein the filler is one or more of calcium carbonate, kaolin and talcum powder; the plasticizer is any one of paraffin oil and naphthenic oil; the anti-aging agent is one or more of an anti-aging agent Alba, an anti-aging agent BBM and an anti-aging agent W-300; the colorant is one or more of cyanine green G, 5952 pigment green B, 5001 rubber green 2B and 5229 basic piny green lake; wherein the crude rubber is a blend of chlorinated polyethylene rubber and other rubbers, and a blend of chlorinated polyethylene rubber and thermoplastic plastics, wherein 50-100 parts of chlorinated polyethylene rubber and 0-50 parts of other rubber blends or thermoplastic plastics are used as raw rubber;
the preparation process comprises the following steps:
(1) setting the temperature of an internal mixer to be 80-170 ℃, setting the rotating speed to be 40-70rpm, putting raw rubber into the internal mixer according to the proportion, sequentially adding a filler, a plasticizer and an anti-aging agent, mixing for 5-7min, uniformly discharging, feeding slices, and standing for 24h for later use;
(2) setting the temperature of an extruder to be 70-170 ℃, putting the rubber compound slices into the extruder to extrude rubber strips, then carrying out irradiation crosslinking on the rubber strips through an electron accelerator irradiator or a cobalt 60 irradiator, and finally granulating by using a granulator; or granulating the adhesive tape, and performing irradiation crosslinking on the adhesive tape by an electron accelerator irradiator or a cobalt 60 irradiator, wherein the irradiation dose is 5-100 kGy;
(3) and (3) placing the irradiated particles into a high-pressure reaction kettle, heating, introducing a physical foaming agent to a certain pressure, and quickly relieving pressure after the physical foaming agent is saturated in the particles to obtain the micro-foaming lawn particles.
2. The method for preparing micro-foamed environmental-friendly lawn particles as claimed in claim 1, wherein the formulation of the chemical cross-linking-foaming is as follows: 100 parts of raw rubber, 30-150 parts of filler, 5-50 parts of plasticizer, 0.1-5 parts of anti-aging agent, 0-5 parts of vulcanizing agent, 0-6 parts of accelerator and 0-6 parts of activator; wherein the filler is one or more of calcium carbonate, kaolin and talcum powder; the plasticizer is any one of paraffin oil and environment-friendly naphthenic oil; the anti-aging agent is one or more of an anti-aging agent Alba, an anti-aging agent BBM and an anti-aging agent W-300; the active agent is one or more of zinc oxide, stearic acid, zinc stearate and polyethylene glycol; the vulcanizing agent is any one of sulfur or dicumyl peroxide; the vulcanization accelerator is one or more of DM, TMTD, TAIC, DPTT and BZ; the colorant is one or more of cyanine green G, 5952 pigment green B, 5001 rubber green 2B and 5229 basic piny green lake; the raw rubber is a blend of chlorinated polyethylene rubber and other rubbers, and a blend of chlorinated polyethylene rubber and thermoplastic plastics, wherein 50-100 parts of chlorinated polyethylene rubber and 0-50 parts of other rubber blends or thermoplastic plastics are used as raw rubber;
the preparation process comprises the following steps:
(1) setting the temperature of an internal mixer to be 80-120 ℃, setting the rotating speed to be 40-70rpm, putting raw rubber into the internal mixer according to the proportion, sequentially adding a filler, a plasticizer, an anti-aging agent and the like, uniformly discharging after mixing for 5-7min, placing on an open mill, uniformly mixing, feeding slices, standing for 24h for later use;
(2) setting the temperature of an extruder to be 70-170 ℃, putting the rubber compound slices into the extruder to extrude rubber strips, then carrying out chemical crosslinking on the rubber strips through a high-temperature drying tunnel, and finally granulating by using a granulator; or after the adhesive tape is granulated, the adhesive tape passes through a high-temperature drying tunnel to be chemically crosslinked;
(3) putting the pre-vulcanized particles into a high-pressure reaction kettle, heating, introducing a physical foaming agent to a certain pressure, and quickly releasing pressure after the physical foaming agent is saturated in the pre-vulcanized particles to prepare non-toxic environment-friendly foamed lawn particles;
(4) and putting the foamed lawn particles into another channel for secondary vulcanization and shaping.
3. The method for preparing micro-foamed environmental-friendly lawn particles as claimed in claim 1 or 2, wherein in the micro-foamed process in the preparation step (3), the temperature of the reaction kettle is set to be 40-130 ℃, the pressure is 5-30Mpa, the saturation time is 0.5-10h, and the pressure relief time is 10-200 s.
4. The method for preparing micro-foaming environmental-friendly lawn particles as claimed in claim 1 or 2, wherein the physical foaming agent is any one or a mixture of CO2, N2, butane and pentane.
5. The method as claimed in claim 1 or 2, wherein the other rubber is EPDM, NBR, NR or BR, and the thermoplastic is polyethylene, PVC, EVA, SBS or POE.
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| CN109971046A (en) * | 2019-04-07 | 2019-07-05 | 常州劲友新材料科技有限公司 | A kind of lawn filler particles |
| CN110157105A (en) * | 2019-05-20 | 2019-08-23 | 广东川奥高新科技有限公司 | A kind of chinampa filling EP rubbers particle and preparation method thereof |
| CN115304840A (en) * | 2022-08-19 | 2022-11-08 | 福建佰易科技有限公司 | Preparation method of supercritical foaming hydrogenated nitrile rubber |
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| CN104130511A (en) * | 2013-05-02 | 2014-11-05 | 天津市技术物理研究所 | Method for preparing chlorinated polyethylene foam material through irradiating vulcanization |
| CN105694248A (en) * | 2016-03-18 | 2016-06-22 | 淄博世纪联合新型建筑材料有限公司 | TPE (thermal plastic elastomer) and application thereof |
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Effective date of registration: 20210818 Address after: No.19, Qinhuai North Road, Lishui Economic Development Zone, Nanjing, Jiangsu, 210000 Patentee after: Jiangsu Da Mao Niu New Material Co.,Ltd. Address before: 266000 Qingdao University of Science & Technology, 99 Songling Road, Laoshan District, Qingdao, Shandong Patentee before: Qingdao University Of Science And Technology |