CN1114607A - Antistatic flame-retardant polyethylene tubing and making method thereof - Google Patents
Antistatic flame-retardant polyethylene tubing and making method thereof Download PDFInfo
- Publication number
- CN1114607A CN1114607A CN 94107357 CN94107357A CN1114607A CN 1114607 A CN1114607 A CN 1114607A CN 94107357 CN94107357 CN 94107357 CN 94107357 A CN94107357 A CN 94107357A CN 1114607 A CN1114607 A CN 1114607A
- Authority
- CN
- China
- Prior art keywords
- antistatic
- flame
- pipe
- polyethylene
- retardant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The present invention relates to an antistatic flame-retardant polyethylene tube material. It is made up by using high-density polyethylene as base material, adding fire retardant, antistatic material, coupling agent and blending modifier and making them pass through suck processes of antistatic, flame-retardant, pressure-resistant and impact-resistant modification treatments. Its main technological steps are: additives mixing, coupling, blending modifying, covering high-density polyethylene granulates, granulating, tube extrusion, cooling, drawing and finished product. Said tube material has the advantages of permanent antistatic performance, good antistatic and flame-resisting synergistic effect, good toughness, flexible quality and high mechanical strength.
Description
The invention relates to a polyethylene pipe with flame-retardant and antistatic properties and a manufacturing method thereof.
It has long been attempted to replace, partially or totally, the steel pipes currently used downhole with plastic tubing. The plastic pipe has the advantages of good corrosion resistance, low cost, low weight and long service life, but also has the defects of easy generation of static electricity, difficult leakage, flammability, low pressure resistance, poor impact resistance and the like. In order to safely and reliably replace steel pipes with plastic pipes downhole, a series of improvements in antistatic, flame retardant, pressure and impact resistance must be made to the plastic. In general, the flame retardant modification is carried out by adding an additive flame retardant to the resin, and various types of flame retardants are selected, and the flame retardant modification may be carried out by selecting … … which is phosphorus-based, halogen-based or antimony-based. One type of flame retardant may be used alone, or several flame retardants may be used in combination. Several antistatic modification methods are available, one is to mix conductive material powder such as carbon black, graphite, metal powder and the like into plastic, but the mechanical strength of the pipe is often greatly reduced by doing so, the formed antistatic index is qualified, and the pressure resistance and impact resistance strength are not qualified; also a method for antistatic modification in HDPEAn organic antistatic agent belonging to a surfactant is added to form a water film on the surface of the plastic, and static electricity can leak to the ground along the water film. However, organic antistatics have hitherto only reduced the surface resistivity of plastics to 108Omega, only water supply and drainage pipes with the caliber of more than 12 inches can be prepared by using the organic antistatic agent, and the pipe cannot be used as a positive pressure air pipe, a negative pressure air pipe, a slurry spraying pipe and a gas drainage pipe.
The invention discloses a polyethylene hose and a manufacturing method thereof (application number: 90106274.X) in plastic product factories of Laiwu, Shandong province, wherein the hose takes polyethylene as a base material and is added with a bromine-containing flame retardant for flame retardant modification; conducting carbon black or antistatic agent is adopted for antistatic modification; and adding a stabilizer, a cross-linking agent, a coupling agent and a blending modifier to perform cross-linking modification, blending modification and inorganic activation treatment. The process flow comprises the following steps: activation → blending → extrusion → pelletizing → mixing → extrusion → traction → cutting → product. Compared with common polyethylene pipes, the invention has the advantages of flame retardance, static resistance, good toughness, soft texture, high mechanical strength and the like. The disadvantages are that the antistatic modification is realized by coating carbon black on the surface of the pipe, and when the pipe is rubbed (such as dragged on the ground) or beaten and smashed, the carbon black on the surface of the pipe can fall off, so the antistatic property is short. If the antistatic modification is carried out by using an organic antistatic agent which belongs to a surfactant, a layer of water film which is invisible to the naked eye is formed on the surface of the plastic due to the hygroscopicity of the antistatic agent, static electricity leaks to the ground through the layer of water film, but the layer of water film is easy to fall off due to dry friction and the like, although the internal antistatic agent migrates to the surface of the plastic due to micro Brownian motion after a long period of time, the water film can be formed, and the electrostatic discharge can be generated in the long period of time, so that serious harm is brought, and even serious flood or explosion accidents are caused.
The invention aims to improve the defects of the prior art and provides an antistatic flame-retardant polyethylene pipe which has good antistatic and flame-retardant synergistic effect, excellent performance, good toughness, soft texture and high mechanical strength.
The object of the invention can be achieved by the following measures:
the antistatic modification of antistatic flame-retardant polyethylene pipe adopts a method of using organic antistatic agentin combination with electrolyte (inorganic salt), inorganic salt and antistatic agent are mixed and added into polyethylene, and a layer of electrolytic solution film with positive and negative ions is formed on the surface of the pipe, so that the surface resistance of the plastic can be greatly reduced.
The object of the invention is also achieved by the following measures:
the composite flame retardant of the antistatic flame-retardant polyethylene pipe is added with the hydrated zinc borate of the boron flame retardant, so that a carbonization layer and a glassy coating are formed on the surface of the pipe, and the pipe can insulate heat and isolate air.
The pipe material proportion (weight ratio) suitable for underground coal mine water supply, drainage, slurry spraying and gas guiding is as follows:
high Density Polyethylene (HDPE): 100
Decabromodiphenyl ether (DBDPO)1.5-20
Antimony trioxide (Sb)2O3)8.0-10.0
Water containing zinc borate (2ZnO 3B)2O3·3.5H2O)10-12
Chlorinated Polyethylene (CPE)17-23
Antistatic agent (HKD-500)8-10
Antistatic adjuvant (HK-1)8-10
Calcium carbonate (CaCO)3)10-15
Talc powder: 10-15
Coupling agent: (NZD-311W)1-3
The manufacturing process of the antistatic flame-retardant polyethylene pipe comprises the following steps:
1. the flame retardant, the antistatic agent, the antistatic auxiliary agent and the filler in the additive are proportioned according to the formula and then put into ahigh-speed mixer, so that the additives are fully and uniformly mixed and dried.
2. And spraying the coupling agent diluted by acetone into a high-speed mixer to ensure that the coupling agent is fully coupled with inorganic matters.
3. The oxidized polyethylene and the antistatic agent are put into a high-speed mixer and are uniformly mixed into other additives.
4. High-density polyethylene pellets are put in, and the surface of the pellets is gradually coated with the additive under high-mixing and low-speed stirring until all the additive is completely coated.
5. And granulating the material from the high-speed mixer by a mixing type double-screw extruder.
The mixture is put into a single-screw extruder, and the length-diameter ratio of the extruder is 25 and the compression ratio is 6 when the pipe is drawn.
The extruded pipe is shaped by a mould, and is drawn and cut off after being cooled to form the antistatic flame-retardant polyethylene pipe meeting the requirements of the dimension specification.
The pipe adopts a method that an organic antistatic agent is matched with an inorganic salt, the inorganic salt and the antistatic agent are mixed and then added into polyethylene, because of the hygroscopicity of the antistatic agent, a layer of extremely thin water film is formed on the surface of the pipe, the water film and the antistatic agent which migrates to the surface form a solution thin layer of the antistatic agent, and according to the theory of colloid chemistry, when the concentration of the solution reaches a certain value, the solution is polymerized into micelles because the hydrophobic group interface of the antistatic agent is reduced. The concentration at which the antistatic agent begins to form micelles is referred to as the critical micelle concentration. The shape of the micelle is spherical, plate-like and rod-like, and the size of the micelle is about several tens of angstroms in diameter. In addition, on the surface of the pipe, inorganic salt is added together with the antistatic agent, and the inorganic salt is ionized into positive and negative ions in a water film on the surface of the pipe, so that water, micelles, and positive and negative ions generated by the ionization of the inorganic salt exist in the thin water film layer on the surface of the pipe. The micelle selectively adsorbs a certain charge, and the micelle adsorbs a certain polarity ion to form a charge, so that inorganic salt ions with opposite charges surround the charged micelle to form a neutral liquid film on the surface of the polyethylene pipe. Therefore, the antistatic agent is essentially different from a water film formed by mixing an inorganic salt with a polyethylene pipe to form a water film on the surface of the pipe, the former is a solution having positive and negative charges, and the latter is conductivity in which some impurities are present. Due to the change on the surface of the pipe, compared with the single use of the antistatic modification, the antistatic modification by adopting the method has the advantage that the surface resistance is reduced by about 3 orders of magnitude. If a large amount of inorganic salt is added to the polyethylene, the amount per unit area on the surface is large, and when this amount reaches a certain level, the solution on the surface of the pipe becomes a non-flowing jelly called a gel. This layer of gel formed on the surface of the pipe is very advantageous for the antistatic modification of the pipe, since it is less likely to be run off and wiped off by water than a water film. Experiments prove that the surface resistance of a polyethylene test piece only added with the antistatic agent is reduced by 3 orders of magnitude after being washed, and the surface resistance of atest piece used by matching the antistatic agent and inorganic salt is reduced by 1 order of magnitude after being washed. Therefore, the invention develops a new way in the aspect of antistatic modification and has unexpected good effect.
The invention relates to an antistatic flame-retardant polyethylene pipe flame-retardant modification system, which is hydrated zinc borate (2 ZnO.3B) added with boron flame retardant in composite flame retardant2O3·3.5H2O) partially replaces antimony trioxide, the price of zinc borate is only half of that of the antimony trioxide, the cost of the pipe can be reduced, and the water-containing zinc borate is white powdery substance with the grain diameter of 2-10 um and the relative density of 2.69. The flame retardant can replace two thirds of the using amount of antimony trioxide, can effectively shorten the flameless combustion time of a pipe and eliminate smoke, and has the flame retardant mechanism of zinc borate, wherein when the flame retardant is used together with a bromine-containing flame retardant to connect a fire source, gaseous boron bromide and zinc bromide are generated, crystal water is released, and the reaction is as follows:
The boron bromide and zinc bromide produced during combustion promote the formation of a dense, strong and carbonized layer in the solid phase, while the zinc bromide and zinc borate form a glassy coating on the combustible surface at elevated temperatures. The charring layer and the glassy coating layer cover the surface of the pipe, so that the pipe can insulate heat and isolate air, and has aflame-retardant effect; the zinc bromide and the boron bromide can capture OH free radicals and H with strong reactivity in a gas phase, and interfere with the chain reaction of combustion interruption; continuously releases a large amount of crystal water at the temperature of more than 300 ℃, and plays the roles of heat absorption, temperature reduction and smoke elimination.
Tubing for downhole use, due to the relatively high pressure of the material being conveyed, is required to withstand the pressure of the material being conveyed against the wall of the pipe without fracturing. In addition, the underground environment is bad, the tubular product can often be impacted by gangue or coal blocks, therefore, the tubular product must have sufficient modification in the aspect of impact resistance, the chlorinated polyethylene is mixed into the high-density polyethylene, the chlorinated polyethylene not only has good toughness, but also has good flame retardance, the dosage of other flame retardants can be reduced by selecting the chlorinated polyethylene, the cost of the product is reduced, the chlorinated polyethylene is a copolymer of ethylene, chloroethylene and dichloroethylene, the chlorinated polyethylene is an elastomer when the chlorine content is 30-40%, and the chlorinated polyethylene has good weather resistance, flame retardance and impact resistance. The impact resistance based on toughening also improves the pressure resistance of the pipe.
Drawings
FIG. 1 is a process flow chart of the antistatic flame-retardant polyethylene pipe of the present invention.
The following describes the antistatic flame-retardant polyethylene pipe and the manufacturing method thereof in detail with reference to the accompanying drawings:
the first scheme is as follows:
the antistatic flame-retardant polyethylene pipe is prepared by adding 17 parts of flame retardant decabromodiphenyl oxide (DBDPO) and antimony trioxide (Sb) into additive2O3)8 parts of hydrated zinc borate (2ZnO 3B)2O3·3.5H2O)11 parts, and antistatic agent (HKD-500)8 parts12 portions of antistatic auxiliary agent (HK-1) and calcium carbonate (CaCO) as filler3)12 portions of talcum powder and 15 portions of talcum powder are put into a high-speed mixer and stirred for 10 to 15 minutes at the temperature of 110 ℃ (the stirring time can be properly prolonged when the materials are wet, all the additives are fully and uniformly mixed and dried, and then the coupling agent diluted by acetone is coupled1.5 parts of the agent (NZD-311W) was sprayed into the high-speed mixer and high-speed stirring was continued for about 25 to 30 minutes to effect sufficient coupling with the above additives. Next, 17 parts of Chlorinated Polyethylene (CPE) was charged into the mixer. 8 parts of antistatic agent (HKD-500). Stirring for 5-10 min to mix the additive, adding 100 portions of high density polyethylene pellet and raising the temperature of the high mixer gradually to obtain 100 portions of pellet, coating the additive on the pellet while stirring at high temperature and low speed until all the additive is coated, and pelletizing the mixture in the high mixer in a mixing double screw extruder at the temperature of 160 deg.c in the first area, 175 deg.c in the second area, 210 deg.c in the third area, 160 deg.c in the fourth area and 150 deg.c in the fifth area. The screw speed was 40 r/min. Then putting the antistatic flame-retardant granules after drying treatment into a single-screw extruder, wherein the length-diameter ratio of the extruder is 25, the compression ratio is 6, and the temperature of each area of the extruder is as follows:160 ℃ in the first zone, 180 ℃ in the second zone, 185 ℃ in the third zone, 170 ℃ in the fourth zone, 160 ℃ in the fifth zone, 20r/min of motor speed and 15-20m/n of traction speed. And (3) shaping the extruded pipe through a mould, cooling, and then drawing and cutting to form the antistatic flame-retardant polyethylene pipe meeting the requirements of size and specification.
Scheme II:
the antistatic flame-retardant polyethylene pipe is prepared by the following materials in parts by weight: high density polyethylene 9HDPE)100, Chlorinated Polyethylene (CPE)19, decabromodiphenyl oxide (DBDPO)15, antimony trioxide (Sb)2O3)10 portions of hydrated zinc borate (2 ZnO.3B)2O3·3.5H2O)12 parts, antistatic agent (HKD-500)9 parts, antistatic auxiliary agent (HK-1)8 parts, and filler calcium carbonate (CaCO)3)10 parts of talcum powder, 12 powder and a coupling agent (NZD-311W) by the same manufacturing process as the scheme I.
The third scheme is as follows:
the antistatic flame-retardant polyethylene pipe is prepared by the following materials in parts by weight: high density polyethylene 9HDPE)100, Chlorinated Polyethylene (CPE)29, decabromodiphenyl oxide (DBDPO)20, antimony trioxide (Sb)2O3)9 parts of hydrated zinc borate (2ZnO 3B)2O3·3.5H210 portions of O), 9 portions of antistatic agent (HKD-500), 15 portions of antistatic auxiliary agent (HK-1), calcium carbonate (CaCO)3)15 parts of talcum powder and 2.5 parts of coupling agent (NZD-311W).
The invention has good practical effect, the antistatic index of the invention is tested by the national coal quality testing center, and the surface resistance of each m length of the pipe is less than 2.6 multiplied by 106Omega, 1 × 10 from the standard specification8Ω/m, about two orders of magnitude smaller; the flame-retardant index was an average value of the flaming combustion time (a set of 6 specimens) of 1.95S (specified as 3S), with the longest flaming combustion time being 2.75S (specified as 10S); tensile strength of 140Kgf/cm2Elongation at break of 50%; the pressure resistance is 50 engineering atmospheric pressures.
The pipe is industrially tested in two coal mines for more than 3 months, the reflection of the two mines is basically the same, and the following is extracted:
1. the specific gravity is small, the weight is light, and the transportation and the installation (relative to steel pipes) are convenient.
2. The price is lower, and the unit price per meter is less than that of a steel pipe, so that cost reduction and efficiency improvement are facilitated.
3. Corrosion resistance and difficult aging; is suitable for special underground coal mine environment.
4. The water leakage and the air leakage do not occur at the joint and outside the joint, and the fracture does not occur in the using process; the joint is not easy to fall off; the coal gangue crushed by the large coal gangue has a small amount of deformation but does not influence the continuous use. Sometimes the tubular product is squeezed flat in the trolley pair, but can basically recover after being flattened and can be continuously used, which shows that the rigidity and the plasticity of the product are all needed underground. The hands feel but are not painful when being touched during the use process; no sparking of the tube was observed. The above shows that the product basically meets the requirement of the assessment outline.
5. Can be used again after being dismantled, even can be used for many times.
Claims (5)
1. An antistatic flame-retarding polyethylene pipe is prepared from high-density polyethylene as basic raw material, flame-retarding agent, antistatic substance, coupling agent, toughening agent and filler through adding flame-retarding agent, antistatic, flame-retarding, pressure-resisting and impact-resisting modification, and features that the antistatic modification is carried out by mixing inorganic salt with antistatic agent and adding them to high-pressure polyethylene to form an electrolyte film containing positive and negative ions on its surface.
2. The antistatic flame-retardant polyethylene pipe as claimed in claim 1, wherein the water containing zinc borate as the boron flame retardant is added to the composite flame retardant to form a carbonized layer and a glassy coating on the surface of the pipe, thereby insulating heat and air.
3. The antistatic flame-retardant polyethylene pipe as claimed in claims 1 to 2, characterized in that the compounding ratio (by weight) is as follows:
high Density Polyethylene (HDPE): 100
Decabromodiphenyl ether (DBDPO): 15-20
Antimony trioxide (Sb)2O3)：8—10
Water containing zinc borate (2ZnO 3B)2O3·3.5H2O)：10—12
Chlorinated Polyethylene (CPE): 17-23
Antistatic agent (HKD-500): 8-10
Antistatic aid (HK-1): 8-15 of
Calcium carbonate (CaCo)3)：10—15
10-15 of talcum powder
Coupling agent (NZD-311W): 1-3
4. The method for manufacturing the flame-retardant antistatic polyethylene pipe is characterized by comprising the following steps:
step A: adding bromodiphenyl ether as fire retardant15-20 parts of (D BDPO) and antimony trioxide (Sb)2O3)8-10 portions of water-containing zinc borate (2ZnO 3B)2O3·3.5H210-12 parts of O), 8-10 parts of antistatic agent (HKD-500), 8-15 parts of antistatic auxiliary agent (HK-1), and calcium carbonate (CaCO) as filler3)10-15 parts of talcum powder and 10-15 parts of additive are put into a high-speed mixer to fully and uniformly mix and dry the additives;
and B: diluting the coupling agent (N) with acetone2D-311W)1-3 parts of the raw materials are sprayed into a high-speed mixer to be fully coupled with inorganic substances;
and C: adding 17-23 parts of Chlorinated Polyethylene (CPE) and 8-15 parts of antistatic agent (HKD-500) into a high-speed mixer, and uniformly mixing the Chlorinated Polyethylene (CPE) and the antistatic agent into other additives;
step D: 100 parts of high-density polyethylene (HDPE) granules are put into a high-speed mixer, and the additives are gradually coated on the surfaces of the granules in high-temperature low-speed stirring until all the additives are coated;
step E: granulating the material discharged from the high-speed mixer through a mixing type double-screw extruder, putting the granulated material into a single-screw extruder, drawing the pipe with the length-diameter ratio of 25 and the die head compression ratio of 6, shaping the extruded pipe through a die, cooling, and then drawing and cutting to form the antistatic flame-retardant polyethylene pipe meeting the requirements of the size specification.
5. The method for manufacturing antistatic flame-retardant polyethylene pipe according to claim 4, wherein in step A, the temperature of the high-speed mixer is controlled at 110 ℃, and stirring is required for 25-30 minutes; step C, stirring for 5-10 minutes; step D, gradually raising the temperature of the high-mixing machine (about 110 ℃) until the surface of the high-density polyethylene (HDPE) granules is softened; and E, during granulation, the first zone of the machine body of the mixing type double-screw extruder is 160 ℃, the second zone is 175 ℃, the third zone is 210 ℃, the fourth zone is 160 ℃, the fifth zone is 150 ℃, the screw rotating speed is 40r/min, the first zone of the machine body of the single-screw extruder is 160 ℃, the second zone is 180 ℃, the third zone is 185 ℃, the fourth zone is 170 ℃, the fifth zone is 180 ℃, the motor rotating speed is 20r/min, and the traction speed is 15-20 m/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94107357 CN1114607A (en) | 1994-07-08 | 1994-07-08 | Antistatic flame-retardant polyethylene tubing and making method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94107357 CN1114607A (en) | 1994-07-08 | 1994-07-08 | Antistatic flame-retardant polyethylene tubing and making method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1114607A true CN1114607A (en) | 1996-01-10 |
Family
ID=5032976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94107357 Pending CN1114607A (en) | 1994-07-08 | 1994-07-08 | Antistatic flame-retardant polyethylene tubing and making method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1114607A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304475C (en) * | 2005-03-11 | 2007-03-14 | 煤炭科学研究总院重庆分院 | Material for drawing out methane polyethylene pipe for mining |
| CN101921424A (en) * | 2010-08-23 | 2010-12-22 | 河北颐通管业有限公司 | Raw material for manufacturing pipe for transporting combustible gases |
| CN102173006A (en) * | 2011-03-14 | 2011-09-07 | 镇国广 | Production method of ultra-clean dustless non-static polyethylene insulating material |
| CN102359668A (en) * | 2011-09-29 | 2012-02-22 | 广东东方管业有限公司 | Flame retardant and antistatic steel mesh skeleton polyethylene composite pipe for mining and manufacturing method thereof |
| CN102504389A (en) * | 2011-10-21 | 2012-06-20 | 浙江师范大学 | Heat insulating and flame retardant felt |
| CN102757590A (en) * | 2012-07-31 | 2012-10-31 | 王鸿 | Floor, manufacture method and application thereof |
| CN102850623A (en) * | 2012-08-21 | 2013-01-02 | 天津军星管业集团有限公司 | Whisker-reinforced polyethylene pipe used in coal mine and preparation method thereof |
| CN103524832A (en) * | 2013-09-25 | 2014-01-22 | 吴江市天源塑胶有限公司 | Anti-static flame retardant plastic |
| CN103589034A (en) * | 2012-08-17 | 2014-02-19 | 吉林喜丰节水科技股份有限公司 | Special material for water supply pipe used in mine |
| CN103992553A (en) * | 2014-04-30 | 2014-08-20 | 安徽省宁国市明浩包装材料有限公司 | Antistatic gas discharge tube and production method thereof |
| CN105218931A (en) * | 2015-11-02 | 2016-01-06 | 苏州新区佳合塑胶有限公司 | A kind of mining high density polyethylene(HDPE) fire retardant material formula |
| CN109249606A (en) * | 2018-09-12 | 2019-01-22 | 东港市远东节水灌溉设备有限公司 | A kind of fire retardant, antistatic polyethylene pipe material and preparation method thereof |
| CN112574490A (en) * | 2020-12-11 | 2021-03-30 | 苏州市皓月管业有限公司 | High-density polyethylene flame-retardant sub-pipe and preparation method thereof |
-
1994
- 1994-07-08 CN CN 94107357 patent/CN1114607A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304475C (en) * | 2005-03-11 | 2007-03-14 | 煤炭科学研究总院重庆分院 | Material for drawing out methane polyethylene pipe for mining |
| CN101921424A (en) * | 2010-08-23 | 2010-12-22 | 河北颐通管业有限公司 | Raw material for manufacturing pipe for transporting combustible gases |
| CN101921424B (en) * | 2010-08-23 | 2011-12-07 | 河北颐通管业有限公司 | Raw material for manufacturing pipe for transporting combustible gases |
| CN102173006A (en) * | 2011-03-14 | 2011-09-07 | 镇国广 | Production method of ultra-clean dustless non-static polyethylene insulating material |
| CN102359668A (en) * | 2011-09-29 | 2012-02-22 | 广东东方管业有限公司 | Flame retardant and antistatic steel mesh skeleton polyethylene composite pipe for mining and manufacturing method thereof |
| CN102504389A (en) * | 2011-10-21 | 2012-06-20 | 浙江师范大学 | Heat insulating and flame retardant felt |
| CN102757590A (en) * | 2012-07-31 | 2012-10-31 | 王鸿 | Floor, manufacture method and application thereof |
| CN103589034A (en) * | 2012-08-17 | 2014-02-19 | 吉林喜丰节水科技股份有限公司 | Special material for water supply pipe used in mine |
| CN103589034B (en) * | 2012-08-17 | 2015-07-15 | 吉林喜丰节水科技股份有限公司 | Special material for water supply pipe used in mine |
| CN102850623A (en) * | 2012-08-21 | 2013-01-02 | 天津军星管业集团有限公司 | Whisker-reinforced polyethylene pipe used in coal mine and preparation method thereof |
| CN103524832A (en) * | 2013-09-25 | 2014-01-22 | 吴江市天源塑胶有限公司 | Anti-static flame retardant plastic |
| CN103992553A (en) * | 2014-04-30 | 2014-08-20 | 安徽省宁国市明浩包装材料有限公司 | Antistatic gas discharge tube and production method thereof |
| CN105218931A (en) * | 2015-11-02 | 2016-01-06 | 苏州新区佳合塑胶有限公司 | A kind of mining high density polyethylene(HDPE) fire retardant material formula |
| CN109249606A (en) * | 2018-09-12 | 2019-01-22 | 东港市远东节水灌溉设备有限公司 | A kind of fire retardant, antistatic polyethylene pipe material and preparation method thereof |
| CN112574490A (en) * | 2020-12-11 | 2021-03-30 | 苏州市皓月管业有限公司 | High-density polyethylene flame-retardant sub-pipe and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1114607A (en) | Antistatic flame-retardant polyethylene tubing and making method thereof | |
| US8912243B2 (en) | Compositions, additives, and compounds for melt processable, foamable, and cellular fluoroploymers | |
| CN1304475C (en) | Material for drawing out methane polyethylene pipe for mining | |
| CN100412124C (en) | Flame-proof polyethylene material and its preparation method | |
| CN101029160A (en) | Formula for producing polyvinyl chloride double-wall corrugated pipe | |
| CN1803907A (en) | Radiation cross-linked low-smoke halogen-free phosphor-free nanometer flame retardant thermal shrinkage material and method for preparing the same | |
| CN102002198A (en) | Titanate coupling agent modified polyvinyl chloride pipe material and manufacturing method thereof | |
| CN114864161A (en) | Fire-resistant cable with cross-linked polyethylene insulating flame-retardant polyvinyl chloride sheath | |
| CN103172920A (en) | Environment-friendly flame-retardant anti-static polyethylene mining tube | |
| CN108485092A (en) | Flame-retardant and anti-static CPE Composites and preparation method thereof applied to gas drainage pipeline | |
| CN109942890B (en) | Graphene-based antistatic agent with smoke suppression function and preparation method thereof | |
| CN1500828A (en) | Polyethylene (PE) plastic-wood panel | |
| CN1752132A (en) | 90 degree C butyronitrile composite extra soft protective layer grade polyvinyl chloride plastic | |
| CN1676546A (en) | Polyvinyl chloride elastomer formula for flame-retarded mining flexible cable and its processing method | |
| CN1125956A (en) | Compatibilized blends containing halogenated copolymers of isobutylene and paramethyl styrene and carboxy modified elastomers | |
| CN107556650A (en) | A kind of environmental protection polyvinyl chloride waterproof roll | |
| CN1221604C (en) | Antistatic fireproof composite polyethylene pipe and its production process | |
| CN109280259B (en) | EVA/PA6 flame-retardant composite material added with OMMT in distribution regulation and control mode and preparation method | |
| CN105237892A (en) | Cold-resistance flame-retardant cable sheath material and preparation method thereof | |
| CN1058033C (en) | Anti-electrostatic fire retardant low-density polyethylene hose | |
| CN114672102A (en) | Hydrogen sulfide corrosion resistant rubber waterstop and preparation method thereof | |
| CN1807499A (en) | Halogen-free combustion-proof polypropylene high-speed abrasion-proof insulating material for auto initial line | |
| CN115612214A (en) | Low-Mooney high-hardness ethylene propylene diene monomer composite material and preparation method thereof | |
| CN115490975A (en) | Modified polyvinyl chloride automobile cable material resistant to high and low temperatures of-40 ℃ and 125 ℃ and preparation method thereof | |
| CN1408755A (en) | Flame-retardant anti-static boots material formulation and its prepducing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |