CN114230837A - Preparation method of FRPE buried sewage pipe - Google Patents

Preparation method of FRPE buried sewage pipe Download PDF

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Publication number
CN114230837A
CN114230837A CN202111629553.XA CN202111629553A CN114230837A CN 114230837 A CN114230837 A CN 114230837A CN 202111629553 A CN202111629553 A CN 202111629553A CN 114230837 A CN114230837 A CN 114230837A
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Prior art keywords
pipe
frpe
parts
flame
buried
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CN202111629553.XA
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郭宗智
王则川
龙鹏飞
邹祖兴
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Guizhou Gs Technology Plastic Pipe Co ltd
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Guizhou Gs Technology Plastic Pipe Co ltd
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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
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
    • 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
    • C08J2323/02—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
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/12—Polypropene
    • 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
    • C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2433/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C08J2433/10—Homopolymers or copolymers of methacrylic acid esters
    • C08J2433/12—Homopolymers or copolymers of methyl methacrylate
    • 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
    • C08J2435/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Derivatives of such polymers
    • C08J2435/06—Copolymers with vinyl aromatic monomers
    • 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
    • C08J2455/00—Characterised by the use of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08J2423/00 - C08J2453/00
    • C08J2455/02—Acrylonitrile-Butadiene-Styrene [ABS] polymers
    • 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
    • C08J2479/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2461/00 - C08J2477/00
    • C08J2479/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2296—Oxides; Hydroxides of metals of zinc
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/32—Phosphorus-containing compounds
    • C08K2003/329—Phosphorus containing acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/34—Heterocyclic compounds having nitrogen in the ring
    • C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
    • C08K5/3477—Six-membered rings
    • C08K5/3492—Triazines
    • C08K5/34922—Melamine; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/10—Encapsulated ingredients

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

The invention discloses a method for preparing an FRPE buried blow-off pipe, which comprises the following steps: preparing raw materials, wherein the raw materials comprise the following components in percentage by weight: 100 parts of PE resin, 20-30 parts of flame-retardant master batch, 1-3 parts of compatilizer and 2-4 parts of anti-aging agent; adding the raw materials into a high-speed mixer, uniformly mixing, adding the mixture into a double-screw extruder, extruding to obtain a pipe blank, and cooling and forming the pipe blank under cooling water; and coating hot melt adhesive on the surface of the formed pipe blank, then coating high-molecular water-absorbent resin powder coating, and finally wrapping the surface of the pipe by adopting flame-retardant non-woven fabric to finish the preparation of the FRPE buried blow-off pipe. The preparation method can improve the flame retardant property of the FRPE buried drain pipe and keep excellent mechanical property.

Description

Preparation method of FRPE buried sewage pipe
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of blow-off pipes, in particular to a preparation method of an FRPE buried blow-off pipe.
[ background of the invention ]
PE (polyethylene) is a thermoplastic resin obtained by polymerizing ethylene, and has excellent properties, thereby being widely used in various fields. When the PE material is manufactured into the sewage supply and discharge pipe for use, the PE material has excellent corrosion resistance, wear resistance, flexibility and low temperature resistance, and simultaneously has the advantages of long service life, low production energy consumption, small water flow resistance and easy installation and disassembly, thereby being an ideal substitute of the traditional water supply and discharge steel pipe. However, the PE pipe also has certain defects when being used as a sewage supply and discharge pipe, and the pipe made of the PE material generally has the defect of poor flame retardant property because the PE material is a flammable polymer. In order to ensure the use safety, a flame retardant is usually added into the PE pipe to improve the flame retardant property of the PE pipe, the existing commonly used halogen flame retardant is gradually stopped being used due to the problem of environmental pollution, and the PE pipe added with the halogen-free flame retardant has the defects of poor flame retardant effect and easy reduction of the mechanical property of the PE pipe. Therefore, it is necessary to provide a method for preparing FRPE buried sewage pipes to solve the above problems.
[ summary of the invention ]
The invention aims to solve the technical problem of providing a preparation method of an FRPE buried blow-off pipe, which can improve the flame retardant property of the FRPE buried blow-off pipe and keep excellent mechanical property.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a preparation method of an FRPE buried sewage pipe comprises the following steps:
s1: preparing raw materials, wherein the raw materials comprise the following components in percentage by weight: 100 parts of PE resin, 20-30 parts of flame-retardant master batch, 1-3 parts of compatilizer and 2-4 parts of anti-aging agent;
s2: adding the raw materials into a high-speed mixer, uniformly mixing, adding the mixture into a double-screw extruder, extruding to obtain a pipe blank, and cooling and forming the pipe blank under cooling water;
s3: and coating hot melt adhesive on the surface of the formed pipe blank, then coating high-molecular water-absorbent resin powder coating, and finally wrapping the surface of the pipe by adopting flame-retardant non-woven fabric to finish the preparation of the FRPE buried blow-off pipe.
Preferably, the flame-retardant master batch is a phosphorus-nitrogen compound type expansion flame-retardant master batch with the mass ratio of a carbon source to an acid source of 1: 1-1: 2, the carbon source is a macromolecular hyperbranched triazine charring agent, and the acid source is selected from one or a combination of microencapsulated polyphosphoric acid and microencapsulated melamine ammonium polyphosphate.
Preferably, the compatilizer is selected from one or more of methyl methacrylate-glycidyl methacrylate-ethyl acrylate terpolymer, maleic anhydride grafted acrylonitrile-butadiene-styrene terpolymer, styrene-maleic anhydride random copolymer and styrene-maleic anhydride copolymer.
Preferably, the aging inhibitor is nanoscale zinc oxide.
Preferably, the high molecular water-absorbing resin is polyacrylate high molecular water-absorbing resin, polyamide high molecular water-absorbing resin or a mixed resin of the polyacrylate high molecular water-absorbing resin and the polyamide high molecular water-absorbing resin.
Preferably, the flame-retardant non-woven fabric is made of PP materials.
Preferably, the hot melt adhesive is an EVA hot melt adhesive.
Compared with the prior art, in the preparation method of the FRPE buried blow-off pipe, the surface of the pipe blank is coated with the high-molecular water-absorbent resin, the water in the soil can be absorbed by utilizing the strong water absorption capacity of the high-molecular water-absorbent resin and is enriched on the surface of the pipe, and when a fire disaster occurs, the high-molecular water-absorbent resin is hydrolyzed under the high-temperature condition to generate a large amount of water, so that a good flame-retardant effect is achieved.
[ detailed description ] embodiments
The following description of the present invention is provided to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention and to make the above objects, features and advantages of the present invention more comprehensible.
The invention provides a method for preparing an FRPE (flame retardant polyethylene) buried sewage pipe, which comprises the following steps:
s1: preparing raw materials, wherein the raw materials comprise the following components in percentage by weight: 100 parts of PE resin, 20-30 parts of flame-retardant master batch, 1-3 parts of compatilizer and 2-4 parts of anti-aging agent.
Preferably, the flame-retardant master batch is a phosphorus-nitrogen compound type expansion flame-retardant master batch with the mass ratio of a carbon source to an acid source of 1: 1-1: 2, the carbon source is a macromolecular hyperbranched triazine charring agent, and the acid source is selected from one or a combination of microencapsulated polyphosphoric acid and microencapsulated melamine ammonium polyphosphate; the compatilizer is selected from one or more of methyl methacrylate-glycidyl methacrylate-ethyl acrylate terpolymer, maleic anhydride grafted acrylonitrile-butadiene-styrene terpolymer, styrene-maleic anhydride random copolymer and styrene-maleic anhydride copolymer; the anti-aging agent is nano-grade zinc oxide.
The flame-retardant master batch can be used for well modifying PE, so that the flame retardant property is greatly improved.
S2: adding the raw materials into a high-speed mixer, uniformly mixing, adding the mixture into a double-screw extruder, extruding to obtain a pipe blank, and cooling and forming the pipe blank under cooling water;
the extrusion temperature of the double-screw extruder is 180-220 ℃, and the temperature of the cooling water is 20-25 ℃.
S3: and coating hot melt adhesive on the surface of the formed pipe blank, then coating high-molecular water-absorbent resin powder coating, and finally wrapping the surface of the pipe by adopting flame-retardant non-woven fabric to finish the preparation of the FRPE buried blow-off pipe.
Preferably, the high molecular water-absorbing resin is polyacrylate high molecular water-absorbing resin, polyamide high molecular water-absorbing resin or a mixed resin of the polyacrylate high molecular water-absorbing resin and the polyamide high molecular water-absorbing resin; the flame-retardant non-woven fabric is made of a PP material; the hot melt adhesive is EVA hot melt adhesive.
The polymer resin is a low-crosslinking degree or partially crystalline polymer having many hydrophilic groups, absorbs hundreds or even thousands of times of its own weight of water, and has a strong water-retaining ability. After the pipe is buried underground in the stratum soil, the polymer resin can adsorb the moisture in the soil and enrich on the surface of the pipe, when a fire disaster occurs, the polymer resin can be hydrolyzed to generate a large amount of moisture under the high-temperature condition, on one hand, the hydrolysis can absorb heat, on the other hand, the generated water vapor can well extinguish the flame, and then a good flame-retardant effect is achieved.
The PP (polypropylene) material has the characteristic of high burning point, and the PP material is adopted to carry out directional or random arrangement on textile short fibers or filaments to form a fiber web structure. Utilize the PP non-woven fabrics to carry out the cladding to polymer resin, can avoid polymer resin's the droing, moisture can permeate through the PP non-woven fabrics simultaneously and be adsorbed by polymer resin.
Example one
S1: preparing raw materials, wherein the raw materials comprise the following components in percentage by weight: 100 parts of PE resin, 20 parts of flame-retardant master batch, 1 part of compatilizer and 2 parts of anti-aging agent; the flame-retardant master batch is a phosphorus-nitrogen compound type expansion flame-retardant master batch with the mass ratio of a carbon source to an acid source being 1:1, the carbon source is a macromolecular hyperbranched triazine series carbon forming agent, and the acid source is selected from microencapsulated polyphosphoric acid; the compatilizer is selected from methyl methacrylate-glycidyl methacrylate-ethyl acrylate terpolymer; the anti-aging agent is nano-grade zinc oxide.
S2: adding the raw materials into a high-speed mixer, uniformly mixing, adding the mixture into a double-screw extruder, extruding to obtain a pipe blank, and cooling and forming the pipe blank under cooling water; the extrusion temperature of the twin-screw extruder was 180 ℃ and the temperature of the cooling water was 20 ℃.
S3: and coating hot melt adhesive on the surface of the formed pipe blank, then coating high-molecular water-absorbent resin powder coating, and finally wrapping the surface of the pipe by adopting flame-retardant non-woven fabric to finish the preparation of the FRPE buried blow-off pipe.
Example two
S1: preparing raw materials, wherein the raw materials comprise the following components in percentage by weight: 100 parts of PE resin, 27 parts of flame-retardant master batch, 2.4 parts of compatilizer and 3 parts of anti-aging agent; the flame-retardant master batch is a phosphorus-nitrogen compound type expansion flame-retardant master batch with the mass ratio of a carbon source to an acid source being 1:1.5, the carbon source is a macromolecular hyperbranched triazine series charring agent, and the acid source is selected from microencapsulated melamine ammonium polyphosphate; the compatilizer is selected from maleic anhydride grafted acrylonitrile-butadiene-styrene terpolymer; the anti-aging agent is nano-grade zinc oxide.
S2: adding the raw materials into a high-speed mixer, uniformly mixing, adding the mixture into a double-screw extruder, extruding to obtain a pipe blank, and cooling and forming the pipe blank under cooling water; the extrusion temperature of the twin-screw extruder was 200 ℃ and the temperature of the cooling water was 22 ℃.
S3: and coating hot melt adhesive on the surface of the formed pipe blank, then coating high-molecular water-absorbent resin powder coating, and finally wrapping the surface of the pipe by adopting flame-retardant non-woven fabric to finish the preparation of the FRPE buried blow-off pipe.
EXAMPLE III
S1: preparing raw materials, wherein the raw materials comprise the following components in percentage by weight: 100 parts of PE resin, 30 parts of flame-retardant master batch, 3 parts of compatilizer and 4 parts of ageing resistance; the flame-retardant master batch is a phosphorus-nitrogen compound type expansion flame-retardant master batch with the mass ratio of a carbon source to an acid source being 1:2, the carbon source is a macromolecular hyperbranched triazine series carbon forming agent, and the acid source is selected from the combination of microencapsulated polyphosphoric acid and microencapsulated melamine ammonium polyphosphate; the compatilizer is selected from styrene-maleic anhydride random copolymer; the anti-aging agent is nano-grade zinc oxide.
S2: adding the raw materials into a high-speed mixer, uniformly mixing, adding the mixture into a double-screw extruder, extruding to obtain a pipe blank, and cooling and forming the pipe blank under cooling water;
the extrusion temperature of the twin-screw extruder was 220 ℃ and the temperature of the cooling water was 25 ℃.
S3: and coating hot melt adhesive on the surface of the formed pipe blank, then coating high-molecular water-absorbent resin powder coating, and finally wrapping the surface of the pipe by adopting flame-retardant non-woven fabric to finish the preparation of the FRPE buried blow-off pipe.
The FRPE buried sewage pipes prepared in the first, second and third embodiments are respectively subjected to the following experiments: the tensile strength, elongation at break tests were carried out with reference to the standard ASTM D412; the oxygen index is tested with reference to the standard ASTM D2863; the vertical burning test was carried out with reference to the standard ASTM D3801; the hot elongation and permanent set tests were carried out with reference to the standard IEC60811 and the resulting pipes have the properties shown in table 1:
TABLE 1 pipe Property Table
Figure BDA0003439841030000041
Figure BDA0003439841030000051
As can be seen from Table 1, the pipe material prepared by the preparation method of the FRPE buried sewage pipe provided by the invention has good flame retardant property and can keep excellent mechanical property.
Compared with the prior art, in the preparation method of the FRPE buried blow-off pipe, the surface of the pipe blank is coated with the high-molecular water-absorbent resin, the water in the soil can be absorbed by utilizing the strong water absorption capacity of the high-molecular water-absorbent resin and is enriched on the surface of the pipe, and when a fire disaster occurs, the high-molecular water-absorbent resin is hydrolyzed under the high-temperature condition to generate a large amount of water, so that a good flame-retardant effect is achieved.
The embodiments described above are intended to facilitate one of ordinary skill in the art in understanding and using the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims (7)

1. A preparation method of an FRPE buried sewage pipe is characterized by comprising the following steps:
s1: preparing raw materials, wherein the raw materials comprise the following components in percentage by weight: 100 parts of PE resin, 20-30 parts of flame-retardant master batch, 1-3 parts of compatilizer and 2-4 parts of anti-aging agent;
s2: adding the raw materials into a high-speed mixer, uniformly mixing, adding the mixture into a double-screw extruder, extruding to obtain a pipe blank, and cooling and forming the pipe blank under cooling water;
s3: and coating hot melt adhesive on the surface of the formed pipe blank, then coating high-molecular water-absorbent resin powder coating, and finally wrapping the surface of the pipe by adopting flame-retardant non-woven fabric to finish the preparation of the FRPE buried blow-off pipe.
2. The FRPE buried sewage pipe preparation method according to claim 1, wherein the flame retardant master batch is a phosphorus-nitrogen compound type expanded flame retardant master batch with a mass ratio of a carbon source to an acid source of 1: 1-1: 2, the carbon source is a macromolecular hyperbranched triazine char forming agent, and the acid source is selected from one or a combination of microencapsulated polyphosphoric acid and microencapsulated melamine ammonium polyphosphate.
3. The method of making an FRPE buried drain of claim 1 wherein the compatibilizer is selected from one or more of a methyl methacrylate-glycidyl methacrylate-ethyl acrylate terpolymer, a maleic anhydride grafted acrylonitrile-butadiene-styrene terpolymer, a styrene-maleic anhydride random copolymer, and a styrene-maleic anhydride copolymer.
4. The method of preparing an FRPE buried sewage pipe of claim 1 wherein the anti-aging agent is nano zinc oxide.
5. The method for preparing the FRPE buried sewage pipe according to claim 1, wherein the high molecular water absorbent resin is polyacrylate type high molecular water absorbent resin, polyamide type high molecular water absorbent resin or a mixed resin of the polyacrylate type high molecular water absorbent resin and the polyamide type high molecular water absorbent resin.
6. The method for preparing the FRPE buried sewage pipe according to claim 1, wherein the flame retardant non-woven fabric is made of PP.
7. The method for preparing the FRPE buried sewage pipe according to claim 1, wherein the hot melt adhesive is an EVA hot melt adhesive.
CN202111629553.XA 2021-12-28 2021-12-28 Preparation method of FRPE buried sewage pipe Pending CN114230837A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1557516A (en) * 2004-01-14 2004-12-29 浙江大学 High water absorption resin water suction gel fire extinguisher and its application
CN101402759A (en) * 2008-11-14 2009-04-08 江苏常盛管业有限公司 Modified polythene tube for buried pollution discharge
CN104250391A (en) * 2014-09-26 2014-12-31 安徽合聚阻燃新材料股份有限公司 Silane crosslinking halogen-free flame retardant polyolefin composite material and preparation method thereof
CN210919074U (en) * 2019-10-09 2020-07-03 湖北木之君工程材料有限公司 Flame-retardant concrete maintenance film for tunnel engineering
CN112080057A (en) * 2020-09-17 2020-12-15 江西龙正科技发展有限公司 Polyethylene sewage discharge pipe and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1557516A (en) * 2004-01-14 2004-12-29 浙江大学 High water absorption resin water suction gel fire extinguisher and its application
CN101402759A (en) * 2008-11-14 2009-04-08 江苏常盛管业有限公司 Modified polythene tube for buried pollution discharge
CN104250391A (en) * 2014-09-26 2014-12-31 安徽合聚阻燃新材料股份有限公司 Silane crosslinking halogen-free flame retardant polyolefin composite material and preparation method thereof
CN210919074U (en) * 2019-10-09 2020-07-03 湖北木之君工程材料有限公司 Flame-retardant concrete maintenance film for tunnel engineering
CN112080057A (en) * 2020-09-17 2020-12-15 江西龙正科技发展有限公司 Polyethylene sewage discharge pipe and preparation method thereof

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