CN109721863A - Application of the fire-retardant reclaimed rubber in fire retarding conveying band - Google Patents
Application of the fire-retardant reclaimed rubber in fire retarding conveying band Download PDFInfo
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Abstract
The present invention discloses a kind of application of fire-retardant reclaimed rubber in fire retarding conveying band, the fire-retardant reclaimed rubber, in parts by weight, raw material includes following component: discarded fire retardant trielement ethylene-propylene rubber, polypropylene, inorganic fire retardants, softening agent, cumyl peroxide, initiator, plasticizer, dispersing agent, antioxidant and high electric conductivity carbon black.Fire-retardant reclaimed rubber is made by carrying out regeneration to discarded fire retardant trielement ethylene-propylene rubber in the present invention, it is applied in fire retarding conveying band, the usage amount of raw rubber can be greatly reduced, reduce production cost, simultaneously, fire-retardant reclaimed rubber is had excellent performance, and has excellent processing performance, and cost only has the one third or so of raw rubber price.
Description
Technical field
The present invention relates to rubber regeneration fields, more particularly to a kind of application of fire-retardant reclaimed rubber in fire retarding conveying band.
Background technique
With the continuous development of society, everybody is also higher and higher to the performance requirement of product used, wants to meet these
It asks, rubber product slowly develops towards high intensity, high abrasion, high stable, high flame retardant and ageing-resistant direction, in these high property
After capable of reaching, the recycling of waste rubber goods also becomes a very big problem.Scrap rubber, especially used conveyor belt
Component it is sufficiently complex, be unable to natural degradation for a long time, cause " black more intractable than white pollution (plastic pollution)
Pollution ".Using waste tire come " oil refining ", this " oil refining " not only wastes valuable rubber money for many illegal underground factories
Source, and serious pollution is also produced to environment.The whole world generates millions of scrap rubbers daily, how to these scrap rubbers
It carries out effective processing and has become whole society's question of common concern.For time order and function, every country experienced burial,
The stages such as burning, heat utilization, ground rubber.But burning, pyrolysis etc. can generate serious secondary pollution, by reclaiming etc.
The properties of rubber of technology is poor, secondary pollution, regrown material product properties it is bad the problems such as annoying related fields always
Researcher.By crushing, heating, the physical and chemical processes such as mechanical treatment become waste old from circular elastic stage
Reclaimed rubber with plasticity and stickiness, can utilizing after curing.Part raw rubber is replaced to be used to produce various rubbers reclaimed rubber
Glue product produces the rubber product to shelves using 100% reclaimed rubber, since reclaimed rubber has excellent processing performance, and
And it is cheap, its price only has the one third or so of raw rubber price.Therefore, the extensive use of reclaimed rubber can not only make
The cost of rubber product reduces, moreover it is possible to improve the production technology of rubber product.
The utility value of scrap rubber especially used conveyor belt is higher, and a large amount of production-goods again can be provided for social production
Source.Carry out scrap rubber recycling be ensure economic growth, adhere to one of vital measure of sustainable development, be turn harm into good,
The important channel turning waste into wealth, prevent and treat black pollution, protecting environment, is Developing Circulation Economy, makes scrap rubber minimizing, nothing
Evilization, recycling, the means of recycling.
Summary of the invention
The object of the present invention is to provide a kind of application of fire-retardant reclaimed rubber in fire retarding conveying band, to solve above-mentioned existing skill
Art there are the problem of, make fire-retardant reclaimed rubber have good processing performance, be used to prepare fire retarding conveying band, substantially reduce cost.
To achieve the above object, the present invention provides following schemes:
The present invention provides a kind of application of fire-retardant reclaimed rubber in fire retarding conveying band, the fire-retardant reclaimed rubber, with parts by weight
Meter, raw material includes following component: discarding fire retardant trielement ethylene-propylene rubber 80-100 parts, 3-5 parts of polypropylene, inorganic fire retardants 30-
44 parts, 30-35 parts of softening agent, 15-22 parts of cumyl peroxide, 1.6-2.5 parts of initiator, 9-11 parts of plasticizer, dispersing agent
10-18 parts, 4-5 parts of antioxidant and 35-40 parts of high electric conductivity carbon black；
The inorganic fire retardants is the mixture of phosphorus flame retardant and nitrogenated flame retardant；The initiator be ammonium persulfate/
Sodium hydrogensulfite initiator；
The plasticizer is at least one of phosphate, alkyl sulfonic acid rouge, epoxide；
The dispersing agent is at least one in gelatin, mosanom, polyacrylate or maleic anhydride-styrene copolymers
Kind；
The antioxidant be zinc dialkyl dithiophosphate, dialkyl dithiophosphoric acid copper, in carbamic acid molybdenum at least
Two kinds；
The preparation of the fire-retardant reclaimed rubber the following steps are included:
(1) discarded fire retardant trielement ethylene-propylene rubber is broken into pellet, is cleaned by ultrasonic, is then dried in dustfree environment；
(2) pellet and polypropylene are added in just mixing device and are sufficiently mixed；The just preferred ribbon mixer of mixing device；
(3) plasticizer is divided into two parts, is uniformly sprayed with injector after a plasticizer preheating to above-mentioned and polypropylene
In mixed pellet；
(4) dispersing agent and another plasticizer are tuned into slurry, are added in said mixture；It is sequentially added after 15min surplus
Remaining raw material, discharging after being mixed completely in first mixing device；
(5) said mixture is added in open mill and is plasticated, two roller speed ratios are 1.1, and roll temperature is 92-98 at a slow speed
DEG C, quick roll temperature is 85-90 DEG C；
(6) above-mentioned product of plasticating is put into stainless steel closed container, kept the temperature in an oven, 170-190 DEG C of holding temperature, protected
Warm time 60-80min；
(7) then discharging is kneaded into mixer, and heating makes temperature of charge be maintained at 175-190 DEG C, makes mixture
Melt to discharge after liquid；
(8) said mixture is added in heat insulating conductive equipment, both ends are powered, and make it under 170-185 DEG C of keeping warm mode
Stand energization 1-1.5h；Positive and negative anodes voltage strength is 100-130V.
Preferably, ultrasonic time is 30-40min in the step (1).Discarded fire retardant trielement ethylene-propylene rubber pellet is first used
Alcohol dilute solution is cleaned, and is then added in ultrasonic device, ultrasonic 30-40min, to remove polyvinyl resin pellet surface oil
Dirty and other impurities avoid the quality and apparent property that influence product.
Preferably, the softening agent is the combination of one or both of rosin, pine tar.
Preferably, described plasticate is plasticated for segmented, and the first stage plasticates 15min, and roll temperature is 92-93 DEG C at a slow speed, fastly
Fast roll temperature is 85-87 DEG C, and cooling simultaneously parks 4-6h；Second stage is plasticated 12min, and roll temperature is 93-95 DEG C at a slow speed, quick roll
Temperature is 87-89 DEG C, and cooling simultaneously parks 2-3h；Phase III plasticates 10min, and roll temperature is 95-98 DEG C at a slow speed, quick roll temperature
Be 89-98 DEG C, it is cooling simultaneously to park 1-1.5h, wherein each stage plasticates the pressure of process and other parameters according to mixer performance and
Feedstock property and dosage are adjusted.
The phosphorus flame retardant and nitrogenated flame retardant press (0.5-1.5): the mass ratio mixing of (4-8).Nitrogenated flame retardant
In the case of fire, CO is released vulnerable to heat2、N2、NH3、NO2And H2The non-combustible gas such as O have taken away a part of heat, these are not
The property of fuel gas is stablized, and energy storage is more, therefore causes the heat released less, and these non-combustible gas are coated on
Around combustion things, the concentration of the imflammable gas such as oxygen is diluted, while nitrogen can capture free radical, inhibit high polymer
Chain reaction, but it is bad at charcoal effect to be single use nitrogenated flame retardant, therefore the present invention makes it in conjunction with phosphorus flame retardant
With by a large amount of Experimental comparison discovery, since additive component of the invention is numerous, phosphorus flame retardant and nitrogenated flame retardant are pressed
(0.5-1.5): when the mass ratio mixing of (4-8), flame retardant effect in the present invention is best.
The invention discloses following technical effects:
Plasticate and mixing process be related to heating and powerful shearing force, ethylene propylene diene rubber plasticate in mixing process
It also added multiple additives, to enhance the performances such as fire-retardant of subsequent products, this is easy for that subsequent products crystal inside is caused to be arranged
Column are chaotic, and lattice is low with tropism degree, and the performance of high molecular material will receive the influence of material internal lattice, when lattice arrangement is mixed
When random, the performance of high molecular material is caused to decline, the present invention at the high molecular material both ends of melting by being powered, since inside is deposited
Carbon black is led in spy, high electric conductivity carbon black is formed with the high chain structure of ghost, specially treated product primary structure partial size 30nm,
Large specific surface area, dispersibility is high, since the reticular structure that wadding aggregation is constituted makes itself have extra-high electric conductivity, than
0.35 Ω CM of resistance；Spy leads carbon black and starts slowly to move along straight line under voltage effect, drives while linear motion high
The ordered arrangement of molecule, so that the lattice linear array after crystallizing it is more orderly, to improve high score to a certain extent
The performance of sub- material also improves its linear intensity simultaneously because lattice is more neat in linear direction arrangement.
Fire-retardant reclaimed rubber is made by carrying out regeneration to discarded fire retardant trielement ethylene-propylene rubber in the present invention, is used for manufacture resistance
Flame resistant conveying belt can greatly reduce the usage amount of raw rubber or only use fire-retardant reclaimed rubber completely, reduce production cost, meanwhile, resistance
Combustion reclaimed rubber is had excellent performance, and has excellent processing performance, and cost only has the one third or so of raw rubber price.Therefore, it hinders
The application of combustion reclaimed rubber can not only be such that the cost of fire retarding conveying band reduces, moreover it is possible to improve the production technology of fire retarding conveying band product.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
The inorganic fire retardants is the mixture of phosphorus flame retardant and nitrogenated flame retardant；The phosphorus flame retardant and the resistance of nitrogen system
Agent is fired to mix by the mass ratio of 1:4；The initiator is ammonium persulfate/sodium hydrogensulfite initiator；The plasticizer is alkane
The mixture that base sulfonic acid rouge and epoxide are mixed with equal quality；The dispersing agent is mosanom and polyacrylate with 1:
The mixture of 2 ratio mixing；The antioxidant is zinc dialkyl dithiophosphate, dialkyl dithiophosphoric acid copper and amino first
The mixture that sour molybdenum is mixed with equal quality ratio；The softening agent of stating is the mixing that rosin and pine tar are mixed with equal quality
Object.
Embodiment 1
A kind of application of fire-retardant reclaimed rubber in fire retarding conveying band, the fire-retardant reclaimed rubber, in parts by weight, raw material packet
Include following component: discarded 80 parts of fire retardant trielement ethylene-propylene rubber, 3 parts of polypropylene, 30 parts of inorganic fire retardants, 30 parts of softening agent, peroxide
15 parts of diisopropylbenzene (DIPB) of change, 1.6 parts of initiator, 9 parts of plasticizer, 10 parts of dispersing agent, 4 parts of antioxidant and 35 parts of high electric conductivity carbon black；
The preparation of the fire-retardant reclaimed rubber the following steps are included:
(1) discarded fire retardant trielement ethylene-propylene rubber is broken into pellet, is cleaned with alcohol dilute solution, ultrasound is then added
In equipment, then ultrasonic 30min is dried in dustfree environment；
(2) pellet and polypropylene are added in just mixing device and are sufficiently mixed；The just preferred ribbon mixer of mixing device；
(3) plasticizer is divided into two parts, is uniformly sprayed with injector after a plasticizer preheating to above-mentioned and polypropylene
In mixed pellet；
(4) dispersing agent and another plasticizer are tuned into slurry, are added in said mixture；It is sequentially added after 15min surplus
Remaining raw material, discharging after being mixed completely in first mixing device；
(5) said mixture being added in open mill and is plasticated, two roller speed ratios are 1.1, and roll temperature is 92 DEG C at a slow speed,
Quick roll temperature is 85 DEG C, and described plasticate is plasticated for segmented, and the first stage plasticates 15min, and roll temperature is 92 DEG C at a slow speed, quickly
Roll temperature is 85 DEG C, and cooling simultaneously parks 4h；Second stage is plasticated 12min, and roll temperature is 93 DEG C at a slow speed, and quick roll temperature is 87
DEG C, cooling simultaneously parks 2-3h；Phase III plasticates 10min, and roll temperature is 95 DEG C at a slow speed, and quick roll temperature is 89 DEG C, it is cooling simultaneously
1h is parked, the pressure of process and other parameters are adjusted according to mixer performance and feedstock property and dosage wherein each stage plasticates
Section；
(6) above-mentioned product of plasticating is put into stainless steel closed container, kept the temperature in an oven, 170 DEG C of holding temperature, when heat preservation
Between 60min；
(7) then discharging be kneaded into mixer, heating so that temperature of charge is maintained at 175 DEG C, melt mixture for
It discharges after liquid；
(8) said mixture is added in heat insulating conductive equipment, both ends are powered, and stand it under 170 DEG C of keeping warm modes
Energization 1h；Positive and negative anodes voltage strength is 100V.
Embodiment 2
A kind of application of fire-retardant reclaimed rubber in fire retarding conveying band, the fire-retardant reclaimed rubber, in parts by weight, raw material packet
Include following component: discarded 90 parts of fire retardant trielement ethylene-propylene rubber, 4 parts of polypropylene, 38 parts of inorganic fire retardants, 33 parts of softening agent, peroxide
18 parts of diisopropylbenzene (DIPB) of change, 2 parts of initiator, 10 parts of plasticizer, 14 parts of dispersing agent, 5 parts of antioxidant and 38 parts of high electric conductivity carbon black；
The preparation of the fire-retardant reclaimed rubber the following steps are included:
(1) discarded fire retardant trielement ethylene-propylene rubber is broken into pellet, is cleaned with alcohol dilute solution, ultrasound is then added
In equipment, then ultrasonic 35min is dried in dustfree environment；
(2) pellet and polypropylene are added in just mixing device and are sufficiently mixed；The just preferred ribbon mixer of mixing device；
(3) plasticizer is divided into two parts, is uniformly sprayed with injector after a plasticizer preheating to above-mentioned and polypropylene
In mixed pellet；
(4) dispersing agent and another plasticizer are tuned into slurry, are added in said mixture；It is sequentially added after 15min surplus
Remaining raw material, discharging after being mixed completely in first mixing device；
(5) said mixture being added in open mill and is plasticated, two roller speed ratios are 1.1, and roll temperature is 95 DEG C at a slow speed,
Quick roll temperature is 87 DEG C, and described plasticate is plasticated for segmented, and the first stage plasticates 15min, and roll temperature is 92 DEG C at a slow speed, quickly
Roll temperature is 86 DEG C, and cooling simultaneously parks 5h；Second stage is plasticated 12min, and roll temperature is 94 DEG C at a slow speed, and quick roll temperature is 88
DEG C, cooling simultaneously parks 2.5h；Phase III plasticates 10min, and roll temperature is 97 DEG C at a slow speed, and quick roll temperature is 94 DEG C, it is cooling simultaneously
1.2h is parked, the pressure of process and other parameters are carried out according to mixer performance and feedstock property and dosage wherein each stage plasticates
It adjusts；
(6) above-mentioned product of plasticating is put into stainless steel closed container, kept the temperature in an oven, 180 DEG C of holding temperature, when heat preservation
Between 70min；
(7) then discharging be kneaded into mixer, heating so that temperature of charge is maintained at 183 DEG C, melt mixture for
It discharges after liquid；
(8) said mixture is added in heat insulating conductive equipment, both ends are powered, and stand it under 178 DEG C of keeping warm modes
Energization 1.3h；Positive and negative anodes voltage strength is 115V.
Embodiment 3
A kind of application of fire-retardant reclaimed rubber in fire retarding conveying band, the fire-retardant reclaimed rubber, in parts by weight, raw material packet
Include following component: discarded 100 parts of fire retardant trielement ethylene-propylene rubber, 5 parts of polypropylene, 44 parts of inorganic fire retardants, 35 parts of softening agent, peroxide
22 parts of diisopropylbenzene (DIPB) of change, 2.5 parts of initiator, 11 parts of plasticizer, 18 parts of dispersing agent, 5 parts of antioxidant and 40 parts of high electric conductivity carbon black；
The preparation of the fire-retardant reclaimed rubber the following steps are included:
(1) discarded fire retardant trielement ethylene-propylene rubber is broken into pellet, is cleaned with alcohol dilute solution, ultrasound is then added
In equipment, then ultrasonic 40min is dried in dustfree environment；
(2) pellet and polypropylene are added in just mixing device and are sufficiently mixed；The just preferred ribbon mixer of mixing device；
(3) plasticizer is divided into two parts, is uniformly sprayed with injector after a plasticizer preheating to above-mentioned and polypropylene
In mixed pellet；
(4) dispersing agent and another plasticizer are tuned into slurry, are added in said mixture；It is sequentially added after 15min surplus
Remaining raw material, discharging after being mixed completely in first mixing device；
(5) said mixture being added in open mill and is plasticated, two roller speed ratios are 1.1, and roll temperature is 98 DEG C at a slow speed,
Quick roll temperature is 90 DEG C, and described plasticate is plasticated for segmented, and the first stage plasticates 15min, and roll temperature is 93 DEG C at a slow speed, quickly
Roll temperature is 87 DEG C, and cooling simultaneously parks 6h；Second stage is plasticated 12min, and roll temperature is 95 DEG C at a slow speed, and quick roll temperature is 89
DEG C, cooling simultaneously parks 3h；Phase III plasticates 10min, and roll temperature is 98 DEG C at a slow speed, and quick roll temperature is 98 DEG C, cooling simultaneously to stop
1.5h is put, the pressure of process and other parameters are adjusted according to mixer performance and feedstock property and dosage wherein each stage plasticates
Section；
(6) above-mentioned product of plasticating is put into stainless steel closed container, kept the temperature in an oven, 190 DEG C of holding temperature, when heat preservation
Between 80min；
(7) then discharging be kneaded into mixer, heating so that temperature of charge is maintained at 190 DEG C, melt mixture for
It discharges after liquid；
(8) said mixture is added in heat insulating conductive equipment, both ends are powered, and stand it under 185 DEG C of keeping warm modes
Energization 1.5h；Positive and negative anodes voltage strength is 130V.
Above-described embodiment 1~3 is prepared into obtained flame-retardant reclaimed rubber steel wire fire retarding conveying band is made and be tested for the property, simultaneously
Fire-retardant reclaimed rubber is replaced to prepare steel wire fire retarding conveying band as a comparison case with same process with ethylene propylene diene rubber, it can be seen that
The steel wire fire retarding conveying band prepared with fire-retardant reclaimed rubber of the invention and the fire-retardant conveying of steel wire prepared using ethylene propylene diene rubber
Band performance is close, illustrates completely may be used with the production that this fire-retardant reclaimed rubber replaces ethylene propylene diene rubber to carry out steel wire fire retarding conveying band
Row, and production cost can be substantially reduced；
The properties test result of its fire retarding conveying band, as shown in table 1,
Table 1
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example | |
| Shao Boer abrasion loss (mm3) | 58 | 65 | 60 | 69 |
| Tensile strength (MPa) | 16.1 | 16.9 | 16.5 | 16.9 |
| Elongation rate of tensile failure (%) | 480 | 524 | 508 | 533 |
| Hardness (SH) | 45 | 52 | 48 | 52 |
| Adhesive strength (N/mm) between coating and belt carcass | 5.0 | 5.0 | 5.1 | 5.0 |
| Smoke density grade (SDR) | 30.8 | 32.5 | 31.5 | 32.5 |
| Oxygen index (OI) | 38.5 | 40.2 | 39.3 | 40.2 |
Embodiment described above is only that preferred embodiment of the invention is described, and is not carried out to the scope of the present invention
It limits, without departing from the spirit of the design of the present invention, those of ordinary skill in the art make technical solution of the present invention
Various changes and improvements, should all fall into claims of the present invention determine protection scope in.
Claims (4)
1. a kind of application of fire-retardant reclaimed rubber in fire retarding conveying band, which is characterized in that the fire-retardant reclaimed rubber, with parts by weight
Meter, raw material includes following component: discarding fire retardant trielement ethylene-propylene rubber 80-100 parts, 3-5 parts of polypropylene, inorganic fire retardants 30-
44 parts, 30-35 parts of softening agent, 15-22 parts of cumyl peroxide, 1.6-2.5 parts of initiator, 9-11 parts of plasticizer, dispersing agent
10-18 parts, 4-5 parts of antioxidant and 35-40 parts of high electric conductivity carbon black；
The inorganic fire retardants is the mixture of phosphorus flame retardant and nitrogenated flame retardant；The initiator is ammonium persulfate/sulfurous
Sour hydrogen sodium initiator；
The preparation of the fire-retardant reclaimed rubber the following steps are included:
(1) discarded fire retardant trielement ethylene-propylene rubber is broken into pellet, is cleaned by ultrasonic, is then dried in dustfree environment；
(2) pellet and polypropylene are added in just mixing device and are sufficiently mixed；
(3) plasticizer is divided into two parts, is uniformly sprayed with injector to above-mentioned after a plasticizer preheating and is mixed with polypropylene
In pellet afterwards；
(4) dispersing agent and another plasticizer are tuned into slurry, are added in said mixture；Remaining original is sequentially added after 15min
Material, discharging after being mixed completely in first mixing device；
(5) said mixture being added in open mill and is plasticated, two roller speed ratios are 1.1, and roll temperature is 92-98 DEG C at a slow speed,
Quick roll temperature is 85-90 DEG C；
(6) above-mentioned product of plasticating is put into stainless steel closed container, kept the temperature in an oven, 170-190 DEG C of holding temperature, when heat preservation
Between 60-80min；
(7) then discharging be kneaded into mixer, heating so that temperature of charge is maintained at 175-190 DEG C, melt mixture for
It discharges after liquid；
(8) said mixture is added in heat insulating conductive equipment, both ends are powered, and stand it under 170-185 DEG C of keeping warm mode
Energization 1-1.5h；Positive and negative anodes voltage strength is 100-130V.
2. a kind of application of the fire-retardant reclaimed rubber according to claim 1 in fire retarding conveying band, which is characterized in that the step
Suddenly ultrasonic time is 30-40min in (1).
3. a kind of application of the fire-retardant reclaimed rubber according to claim 1 in fire retarding conveying band, which is characterized in that described soft
Agent is the combination of one or both of rosin, pine tar.
4. a kind of application of the fire-retardant reclaimed rubber according to claim 1 in fire retarding conveying band, which is characterized in that the modeling
Refining is plasticated for segmented, and the first stage plasticates 15min, and roll temperature is 92-93 DEG C at a slow speed, and quick roll temperature is 85-87 DEG C, cooling
And park 4-6h；Second stage is plasticated 12min, and roll temperature is 93-95 DEG C at a slow speed, and quick roll temperature is 87-89 DEG C, cooling simultaneously to stop
Put 2-3h；Phase III plasticates 10min, and roll temperature is 95-98 DEG C at a slow speed, and quick roll temperature is 89-98 DEG C, cooling simultaneously to park 1-
1.5h。
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|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114921104A (en) * | 2022-07-06 | 2022-08-19 | 广东圆融新材料有限公司 | Polypropylene composite material and preparation method thereof |
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| CN104650469A (en) * | 2015-02-15 | 2015-05-27 | 浙江三佳胶带有限公司 | High-temperature-resistant flame-retardant conveying belt |
| CN106459540A (en) * | 2014-06-25 | 2017-02-22 | 阪东化学株式会社 | Regenerated rubber, process for producing same, and transmission belt including same |
| CN109422963A (en) * | 2017-08-29 | 2019-03-05 | 梁爽 | Mechanical equipment conveyer belt |
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| EP0535849A2 (en) * | 1991-09-30 | 1993-04-07 | General Electric Company | Thermoplastic elastomers based on polyester and EPDM rubber |
| CN103254462A (en) * | 2012-02-21 | 2013-08-21 | 康国冲 | Preparation method of ethylene propylene diene monomer reclaimed rubber |
| CN103435920A (en) * | 2013-09-06 | 2013-12-11 | 威县亚泰密封件有限公司 | Method for producing recycled-ethylene-propylene-terpolymer-rubber seal strip |
| CN106459540A (en) * | 2014-06-25 | 2017-02-22 | 阪东化学株式会社 | Regenerated rubber, process for producing same, and transmission belt including same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114921104A (en) * | 2022-07-06 | 2022-08-19 | 广东圆融新材料有限公司 | Polypropylene composite material and preparation method thereof |
| CN114921104B (en) * | 2022-07-06 | 2023-10-20 | 广东圆融新材料有限公司 | Polypropylene composite material and preparation method thereof |
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