CN110343310A - The high-strength drip irrigation zone of nanometer - Google Patents
The high-strength drip irrigation zone of nanometer Download PDFInfo
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- CN110343310A CN110343310A CN201810298727.0A CN201810298727A CN110343310A CN 110343310 A CN110343310 A CN 110343310A CN 201810298727 A CN201810298727 A CN 201810298727A CN 110343310 A CN110343310 A CN 110343310A
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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
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- 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
- C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
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- C08L2201/00—Properties
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- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2314/06—Metallocene or single site catalysts
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Abstract
The present invention relates to water-saving drip irrigation technical fields, disclose a kind of high-strength drip irrigation zone of nanometer, the component including containing following mass fraction: 10~90 parts of polyvinyl resin, 10~90 parts of recycled polyethylene, 0.3-10 parts of nanometer of masterbatch, 0.1-6 parts of auxiliary agent.The present invention have the characteristics that tensile strength is high, ageing-resistant performance is good, anti-blockage capability is strong, it is resistance to burn, low cost, long-life.It is widely used in the use of the industries such as agricultural, industry of planting forest or fruit tress, greening, lawn.
Description
Technical field
The present invention relates to the high-strength drip irrigation zones of water-saving drip irrigation equipment, especially nanometer.
Background technique
China is the country of serious water shortage, and in total water consumption, irrigation water accounts for 70%, realizes that agriculture irrigation water saving is provided in water
Very important status is accounted in the saving of source, and Xinjiang is typical arid oasis irrigated agricultural area, construction Water-saving Agriculture is agriculture
The key of industry sustainable development.More than 4,000 ten thousand mu of developing agricultural high-efficiency water-saving trickle irrigation area of full boundary 2017, drip irrigation economize skill
Art is the agricultural irrigation technology that Xinjiang is widely used to promote, and is the fourth-largest agricultural production after pesticide, chemical fertilizer, mulch
Data.Trickle irrigation has an actual water-saving and yield-increasing effect, and drip irrigation zone drips pipeline as important in system and is exposed to earth's surface, grows
Time is exposed to the sun by the sun, the aging of rainwater weather, high temperature, is asked since drip irrigation zone labyrinth face is relatively thin and water pressure resistance performance is poor
Topic causes drip irrigation zone booster cracking and labyrinth thorn water phenomenon often occur, affects normal irrigation, the expense to repair or replacing
Work and delay farming season, especially long in the Xinjiang summer high-temperature weather duration, Xinjiang is intensive multi-form agriculture production in addition,
The above problem is especially prominent.Traditional processing technology must reduce polyethylene regeneration in the formula of drip irrigation zone to solve the above problems
The adding proportion of material must not even use, this results in the raising of drip irrigation zone production cost, so that drip irrigation zone performance and cost are not
It can get both.Secondly with the increase for using the trickle irrigation time limit, the recycling and reusing repeatedly of drip irrigation zone, and the negative effect generated is increasingly
Obviously, lead to that existing drip irrigation zone tensile strength is low, water pressure resistance performance is poor, anti-aging property is low, anti-blockage capability is weak, at high cost
Problem.
Summary of the invention
The purpose of the present invention is to provide one kind under conditions of meeting use, at low cost, tensile strength is high, pressure resistance is resistance to old
Change performance is good, and anti-blockage capability is strong, the high-strength drip irrigation zone of the nanometer of stable production process.
The component including containing following mass fraction: a kind of high-strength drip irrigation zone of nanometer 10~90 parts of polyvinyl resin, is gathered
10~90 parts of ethylene reworked material, 0.3-10 parts of nanometer of masterbatch, 0.1-6 parts of auxiliary agent.Because nano-scale particle intensity is good, increase compatible
Property, the characteristics of improving processing performance, so that the high-strength drip irrigation zone tensile strength of nanometer improves 20% or more, oxidation induction time is improved
2 times or more, wall thickness are down to 0.12mm hereinafter, solving that drip irrigation zone is at high cost, pressure-resistant performance is poor, production process is unstable asks
Topic.It is widely used in the use of the industries such as agricultural, industry of planting forest or fruit tress, greening, lawn, there is good Social Ecology and economic benefit；
The high-strength drip irrigation zone of above-mentioned nanometer, it is characterised in that auxiliary agent is 0.1~2 part of lubricant and compound black masterbatch 2
~3 parts, 0.1~2 part of defoaming mother material；Purpose is extension drip irrigation zone using the time, comprehensively considers drip irrigation zone and wants resistance to photooxidation resistance
And thermo-oxidative ageing；
Above-mentioned lubricant is fluoropolymer process aid；
The high-strength drip irrigation zone of above-mentioned nanometer of masterbatch, polyvinyl resin be high density polyethylene (HDPE), linear low density polyethylene (LLDPE) or
The composition of one or more of low density polyethylene (LDPE)；PE100 level high-density polyethylene resin is water-fast because tensile strength is high
Pressure, wear-resisting property are good, so dosage is larger；Strand has been of a straight line type less branch to metallocene linear low density polyethylene again,
Narrow molecular weight distribution, mechanical property are compared with low density polyethylene (LDPE) height；And melt viscosity is low again, processing performance is good for low density polyethylene (LDPE),
Three reaches the perfect combination of performance and cost price according to appropriate proportion；
The high-strength drip irrigation zone of above-mentioned nanometer, polyvinyl resin are 4~45 parts of PE100 level high-density polyethylene and metallocene line
Type low density polyethylene (LDPE) or 3~45 parts of low density polyethylene (LDPE) of mixture, it is therefore an objective to make full use of the poly- second of PE100 level high-density
Alkene tensile strength is high, and water pressure resistance performance is good, and cooperation metallocene linear low density polyethylene elongation at break is high, and puncture resistance is excellent
With viscosity is low, processing performance is good after low density polyethylene (LDPE) fusing so that the elongation at break of the high-strength drip irrigation zone of nanometer is high；
The high-strength drip irrigation zone of above-mentioned nanometer, recycled polyethylene are 4~45 parts of PE100 level high-density polyethylene and metallocene
The mixture that 3~45 parts of linear low density polyethylene (LLDPE), it is therefore an objective to make full use of PE100 level high-density polyethylene tensile strength high,
Water pressure resistance performance is good, and cooperation metallocene linear low density polyethylene elongation at break is high, and puncture resistance is excellent and low density polyethylene
Viscosity is low, processing performance is good after alkene fusing, and the elongation at break of drip irrigation zone is high；
The high-strength drip irrigation zone of above-mentioned nanometer, recycled polyethylene are 5~45 parts of high density polyethylene (HDPE) reworked material and low-density
The mixture that 5~45 parts of recycled polyethylene, it is therefore an objective to make full use of high density polyethylene (HDPE) reworked material tensile strength high, water pressure resistance
Performance is good, and viscosity is low, processing performance is good, the extension at break for the uniform drip irrigation zone that discharges after cooperation low density polyethylene (LDPE) reworked material fusing
Rate is high；
The high-strength drip irrigation zone of above-mentioned nanometer, recycled polyethylene is 5~45 parts of high density polyethylene (HDPE) reworked material, line style is low close
Spend 5~25 parts and 5~20 parts of low density polyethylene (LDPE) reworked material of recycled polyethylene of mixture, it is therefore an objective to make full use of high density
Recycled polyethylene tensile strength is high, and water pressure resistance performance is good, cooperates linear low density polyethylene (LLDPE) reworked material or low density polyethylene (LDPE)
Viscosity is low after reworked material fusing, discharges uniformly, and processing performance is good, and the elongation at break of drip irrigation zone is high.It can also expand simultaneously poly-
The use scope of ethylene reworked material.
Realize that the technical solution of goal of the invention solves in this way: the high-strength drip irrigation zone of nanometer is with nanometer of masterbatch, polyethylene
Resin and recycled polyethylene and its other aid master batches are raw material, are mixed in a certain ratio, through single screw extrusion machine according to one
After fixed technological temperature squeezes out, blow molding, mould wheel shaping, segmentation, cooling, traction, note rice, that finally winding is prepared into nanometer is high-strength
Drip irrigation zone.
The utility model has the advantages that because present invention adds nano-scale particle masterbatch, with the increase of nano-scale particle masterbatch ratio, drop
Band tensile strength values are filled to gradually increase.The addition of certain auxiliary agent plays improvement performance, mainly conducive to processing, but price
Valuableness, adding proportion is high, and the addition of nano-scale particle masterbatch has activeness and quietness performance, is more favorable for processing and forming, causes
The reductions of other auxiliary dosages, while nano-scale particle masterbatch is cheap, additive amount is few, simple production process, comprehensive life
Can be reduced by producing cost by 200-500 yuan/ton, secondly used nano-scale particle masterbatch, do not influenced original processing conditions (such as work not only
Skill temperature), and, small particle in used nano-scale particle masterbatch good with polyvinyl resin and recycled polyethylene compatibility
Inorganic ions few surface defects, non-matching atom is more, large specific surface area, with polymeric material occur physically or chemically
In conjunction with a possibility that it is big, preferably, anti-aging property is excellent, the interfacial adhesion between nano inoganic particle and matrix for dispersibility, can be with
Bear bigger load.To have the function of not only enhancing but also toughening so that the tensile strength of the high-strength drip irrigation zone of nanometer and it is resistance to always
It is higher by 20% than technical indicator difference and 3 times to change performance, while being also used in the stability formula in order to guarantee production process
The use of fluoropolymer process aid and defoaming mother material and the compound above-mentioned auxiliary agent of black masterbatch solves traditional drip irrigation zone and produced
Cheng Zhongyi goes out wet feed bubble, ossify block, sharkskin shape ripple the problems such as, easily rupturable in use process, silt blocking, resistance to ag(e)ing
The problem of energy difference and the sun are burnt, PE100 level high-density polyethylene resin is because tensile strength is high, water pressure resistance.Wear-resisting property is good,
So dosage is larger；Strand has been of a straight line type less branch, narrow molecular weight distribution, power to metallocene linear low density polyethylene again
Performance is learned compared with low density polyethylene (LDPE) height；And melt viscosity is low again, processing performance is good for low density polyethylene (LDPE), three is according to appropriate proportion
Reach the perfect combination of performance and cost price.
Subordinate list explanation:
Table 1 is performance detection table of the invention
Table 2 is the high-strength drip irrigation zone of nanometer and the ordinary drip irrigation tape performance table of comparisons:
Table 3 is the high-strength drip irrigation zone of nanometer and the ordinary drip irrigation tape performance table of comparisons:
Specific embodiment
Embodiment 1
The present invention is made of the raw material containing following mass fraction component: 45 parts of PE100 level high-density polyethylene,
22.5 parts of metallocene linear low density polyethylene, 22.5 parts of low density polyethylene (LDPE), 10 parts of recycled polyethylene, nanometer of masterbatch 10
Part, 0.1 part of defoaming mother material, 0.1 part of fluoropolymer process aid and 3 parts of compound black masterbatch.
Embodiment 2
The present invention is made of the raw material containing following mass fraction component: 4 parts of PE100 level high-density polyethylene, cyclopentadienyl
3 parts of wire-form low density polyethylene (LDPE), 3 parts of low density polyethylene (LDPE), 90 parts of recycled polyethylene, 0.3 part of nanometer of masterbatch, defoaming are female
2 parts of 2 parts of material, 2 parts of fluoropolymer process aid and compound black masterbatch.
Embodiment 3
The present invention is made of the raw material containing following mass fraction component: PE100 level high-density polyethylene 22.5
Part, 11.25 parts of metallocene linear low density polyethylene, 11.25 parts of low density polyethylene (LDPE), 45 part, nanometer mother of recycled polyethylene
2 parts of 5 parts of material, 1.0 parts of defoaming mother material, 1.0 parts of fluoropolymer process aid and compound black masterbatch.
Embodiment 4
The present invention is made of the raw material containing following mass fraction component: 40 parts of PE100 level high-density polyethylene,
20 parts of metallocene linear low density polyethylene, 20 parts of low density polyethylene (LDPE), 20 parts of recycled polyethylene, 9 parts of nanometer of masterbatch, defoaming
2 parts of 0.4 part of masterbatch, 0.4 part of fluoropolymer process aid and compound black masterbatch.
Embodiment 5
The present invention is made of the raw material containing following mass fraction component: 35 parts of PE100 level high-density polyethylene,
17.5 parts of metallocene linear low density polyethylene, 17.5 parts of low density polyethylene (LDPE), 30 parts of recycled polyethylene, nanometer of masterbatch 8
Part, 0.6 part of defoaming mother material, 0.6 part of fluoropolymer process aid and 2 parts of compound black masterbatch.
Embodiment 6
The present invention is made of the raw material containing following mass fraction component: 30 parts of PE100 level high-density polyethylene,
15 parts of metallocene linear low density polyethylene, 15 parts of low density polyethylene (LDPE), 40 parts of recycled polyethylene, 7 parts of nanometer of masterbatch, defoaming
2 parts of 0.8 part of masterbatch, 0.8 part of fluoropolymer process aid and compound black masterbatch.
Embodiment 7
The present invention is made of the raw material containing following mass fraction component: 25 parts of PE100 level high-density polyethylene,
12.5 parts of metallocene linear low density polyethylene, 12.5 parts of low density polyethylene (LDPE), 50 parts of recycled polyethylene, nanometer of masterbatch 6
Part, 1.1 parts of defoaming mother material, 1.1 parts of fluoropolymer process aid and 2 parts of compound black masterbatch.
Embodiment 8
The present invention is made of the raw material containing following mass fraction component: 20 parts of PE100 level high-density polyethylene,
10 parts of metallocene linear low density polyethylene, 10 parts of low density polyethylene (LDPE), 60 parts of recycled polyethylene, 4 parts of nanometer of masterbatch, defoaming
2 parts of 1.3 parts of masterbatch, 1.3 parts of fluoropolymer process aid and compound black masterbatch.
Embodiment 9
The present invention is made of the raw material containing following mass fraction component: 15 parts of PE100 level high-density polyethylene,
7.5 parts of metallocene linear low density polyethylene, 7.5 parts of low density polyethylene (LDPE), 70 parts of recycled polyethylene, 3 parts of nanometer of masterbatch,
2 parts of 1.5 parts of defoaming mother material, 1.5 parts of fluoropolymer process aid and compound black masterbatch.
Embodiment 10
The present invention is made of the raw material containing following mass fraction component: 10 parts of PE100 level high-density polyethylene,
5 parts of metallocene linear low density polyethylene, 5 parts of low density polyethylene (LDPE), 80 parts of recycled polyethylene, 2 parts of nanometer of masterbatch, defoaming are female
2 parts of 1.7 parts of material, 1.7 parts of fluoropolymer process aid and compound black masterbatch.
In conclusion the performance of each composition is as follows:
Nanometer of masterbatch (nano-scale particle): the inorganic ions few surface defects of the small particle in masterbatch, non-matching atom is more,
Large specific surface area, a possibility that physically or chemically being combined with the generation of polymeric material, are big, and dispersibility is preferable, ageing resistance
Can be excellent, the interfacial adhesion between nano inoganic particle and matrix can bear bigger load.Not only enhance but also toughening to have
Function
Fluoropolymer process aid: the peptizaiton of carbon black and inorganic filler in polyvinyl resin is improved, poly- second is reduced
The oxidation gel and cross-linked gel phenomenon of olefine resin and recycled polyethylene in extrusion process improve the mobility of melt and take off
Fruit is imitated, polythene working property is improved.
Compound black masterbatch: a kind of effective ingredient is carbon black, has extraordinary light shield to act on, ultraviolet-resistant aging performance
It is good.Another effective ingredient is mainly prolonged based on antioxidant (1010) and antioxidant (168) and light stabilizer (GW622)
The oxidation induction time (OIT) of long product make the high-strength drip irrigation zone of nanometer existing for the temperature and oxygen under the conditions of extend product and use
Service life.
Defoaming mother material: its principle is that effective component calcium oxide water absorption reaction generates calcium hydroxide (CaO+H2O=Ca (OH) 2
By the water of physical aspect, it is converted into combined form water, will not be volatilized with the raising of temperature, with the increasing of defoaming mother material dosage
Add, recycled polyethylene adding proportion steps up, and the addition of defoaming mother material has the function of the moisture absorption, is more favorable for molding and adds
Work saves the drying electricity charge and labour cost, while the price of defoaming mother material, simple production process.
PE100 level high-density polyethylene (HDPE): average molecular weight is big, narrow molecular weight distribution, and produced product stretches strong
The mechanical properties such as degree, hardness are good.
Metallocene linear low density polyethylene (LLDPE): strand is of a straight line type less branch, molecular weight distribution
Narrow, product puncture resistance is good, and mechanical property wants high compared with low density polyethylene (LDPE).
Low density polyethylene (LDPE) (LDPE): strand be in branched chain type, the low product transparency height of crystallinity, flexibility, caking property,
Processing performance is good.
Claims (6)
1. a kind of high-strength drip irrigation zone of nanometer, feature include the component containing following mass fraction: 10~90 parts of polyvinyl resin,
10~90 parts of recycled polyethylene, 0.3-10 parts of nanometer of masterbatch, 0.1-6 parts of auxiliary agent.
2. the high-strength drip irrigation zone of nanometer as described in claim 1, it is characterised in that nanometer of masterbatch are nanoscale barium sulfate masterbatch, sulphur
Sour barium content is 20~90 parts.
3. the high-strength drip irrigation zone of nanometer as claimed in claim 1 or 2, it is characterised in that polyvinyl resin is PE100 level high-density
One or more of mixtures of polyethylene, metallocene linear low density polyethylene or low density polyethylene (LDPE).
4. the high-strength drip irrigation zone of nanometer as described in claim 1, it is characterised in that auxiliary agent be fluoropolymer lubricant 0.1~
2 parts and 2~3 parts of compound black masterbatch, 0.1~2 part of defoaming mother material.
5. the high-strength drip irrigation zone of nanometer as described in claim 1, it is characterised in that polyvinyl resin is the poly- second of PE100 level high-density
4~45 parts of alkene reworked material and metallocene linear low density polyethylene and 3~45 parts of low density polyethylene (LDPE) of mixture.
6. the high-strength drip irrigation zone of nanometer as claimed in claim 5, it is characterised in that recycled polyethylene be high density polyethylene (HDPE) again
The monomer or mixture that raw material, linear low density polyethylene (LLDPE) reworked material and low density polyethylene (LDPE) reworked material number are 10~90 parts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810298727.0A CN110343310A (en) | 2018-04-04 | 2018-04-04 | The high-strength drip irrigation zone of nanometer |
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| CN201810298727.0A CN110343310A (en) | 2018-04-04 | 2018-04-04 | The high-strength drip irrigation zone of nanometer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113845713A (en) * | 2021-10-18 | 2021-12-28 | 甘肃青龙管业有限责任公司 | Puncture-resistant inlaid patch type drip irrigation tape and preparation method thereof |
| CN113980376A (en) * | 2021-11-04 | 2022-01-28 | 河北乙木源节水科技有限公司 | Novel drip irrigation tape and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502653A (en) * | 2002-11-26 | 2004-06-09 | 新疆天业（集团）有限公司 | Nano material modified drop irrigation band |
| CN102746551A (en) * | 2012-06-18 | 2012-10-24 | 新疆天业（集团）有限公司 | Fluoropolymer processing aid modified drip irrigation belt |
| CN104130495A (en) * | 2014-08-12 | 2014-11-05 | 廊坊华博环保材料有限公司 | Water removal master batch for plastic drip irrigation pipe or drip irrigation zone and preparation method of water removal master batch |
-
2018
- 2018-04-04 CN CN201810298727.0A patent/CN110343310A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502653A (en) * | 2002-11-26 | 2004-06-09 | 新疆天业（集团）有限公司 | Nano material modified drop irrigation band |
| CN102746551A (en) * | 2012-06-18 | 2012-10-24 | 新疆天业（集团）有限公司 | Fluoropolymer processing aid modified drip irrigation belt |
| CN104130495A (en) * | 2014-08-12 | 2014-11-05 | 廊坊华博环保材料有限公司 | Water removal master batch for plastic drip irrigation pipe or drip irrigation zone and preparation method of water removal master batch |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113845713A (en) * | 2021-10-18 | 2021-12-28 | 甘肃青龙管业有限责任公司 | Puncture-resistant inlaid patch type drip irrigation tape and preparation method thereof |
| CN113980376A (en) * | 2021-11-04 | 2022-01-28 | 河北乙木源节水科技有限公司 | Novel drip irrigation tape and preparation method thereof |
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Application publication date: 20191018 |