CN1257936C - Polymeric composite and preparation process and application thereof - Google Patents
Polymeric composite and preparation process and application thereof Download PDFInfo
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- CN1257936C CN1257936C CN 200410008422 CN200410008422A CN1257936C CN 1257936 C CN1257936 C CN 1257936C CN 200410008422 CN200410008422 CN 200410008422 CN 200410008422 A CN200410008422 A CN 200410008422A CN 1257936 C CN1257936 C CN 1257936C
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Abstract
The present invention discloses a polymerization compound having a micropore leakage function, a preparation method and the application thereof in the preparation of micropore leakage pipes. The polymerization compound has the technical scheme that the polymerization compound comprises 40 to 60 wt% of polyvinyl chloride, 15 to 30 wt% of butadiene acrylonitrile rubber, 6 to 10 wt% of thermal stabilizer, 16 to 24 wt% of plasticizer and 1 to 4 wt% of foaming agent. The polymerization compound can be prepared by a physical foaming or chemical foaming method. Irregular micropores are formed on a pipe wall of a product obtained from the polymerization compound. The polymerization compound is suitable for preparing a common micropore leakage pipe on irrigation industry. The irregular micropores are closed under the condition that the irregular micropores are free from pressure. The irregular micropores are opened under certain outer pressure. When pressure in the common micropore leakage pipe is reduced, or does not exist, the irregular micropores are automatically closed, and thus, matter outside the pipe wall is effectively prevented from flowing into the common micropore leakage pipe. The defect that micropores are easy to block in the prior art is solved. The waterproof coiled material can be widely applied to various kinds of forestry and fishery engineering of water saving irrigation, pipeline fertilization, medicine application, pipeline oxygen leakage, etc.
Description
Technical field
The present invention relates to the polymer composites of chemical field, especially a kind of polymer composites and preparation method thereof with micropore seepage function, with and application in preparation micropore leaky pipe.
Background technology
Polyvinyl chloride is owing to have good physicals such as shock-resistance and thermotolerance, and good chemical property, as solvent resistance, acid resistance and alkali resistance, therefore be widely used in the preparation of pipes field, relate to urban water supply and sewerage pipework, farmland water conservancy irrigation conduit engineering, aquaculture water conveyance pipeline project etc.Existing industrial pvc pipe commonly used (Poly Vinyl Chloride) is exactly to be main raw material with the polyvinyl chloride (PVC) RESINS, add various stablizers, protective agent, impact modifier and other auxiliary agent, through extruding the hard polyethylene pipe that machine-shaping forms all size model of different pressures grade, has superperformance.And, can carry out seepage because pvc pipe has micropore, aspect agricultural irrigation, especially for water saving technology application facet such as sprinkling irrigation, drip irrigation and infiltrating irrigations, tool has certain effect.With the agricultural irrigation is example, and water pipe commonly used has the rubber watering pipe with small holes, the anti-stifled single wall face porous slight irrigation pipe of plastics pipe for infiltrating irrigation, eremophyte water, fertile slight irrigation pipe and low pressure.
The little pipe that oozes of rubber is the rubber perforated tube that utilizes elastomeric material to process, a large amount of shape differences of its uniform distribution on tube wall, the indefinite micropore of direction, and it is simple in structure, and cost is lower, and long service life is easy to install and maintenance.But, since the single foaming of rubber, the open-shaped always attitude of the micropore after the formed product.When using for the first time, hydraulic pressure is arranged in the pipe, the tube wall aperture is outer will to produce eddy current, and eddy current makes and produce tiny silt that when the pipe internal pressure reduced, tiny silt just flowed in the aperture of open configuration, with its obstruction.After aperture stopped up, little use value of oozing pipe reduced greatly, and often causing burying water pipe under whole can not use.
The plastics pipe for infiltrating irrigation is made of plastics, and is equipped with the infiltration hole of rule on the body, and permeable corrosion resistant again cloth in shutoff on the infiltration hole, and this cloth decides with the sealing of adhesive tape bundle or the hoop part is fixed.Use the plastics pipe for infiltrating irrigation, can water saving and chemical fertilizer, cost and investment are low, and each infiltrating irrigation point has all even stabilizing water quantity in the whole irrigation district.But, the pipe for infiltrating irrigation that this plastics are made, installation procedure is many, and construction inconvenience pollutes easily, and can only be used for ground surface.Simultaneously, artificial punching can destroy the intensity of pipeline on pipeline, in case be squeezed, from the tapping distortion, water flowing in the influence pipe, and may cause burying water pipe integral body under whole and can not use.
What eremophyte water, fertile micro-irrigation device were mainly used in eremophyte executes water, fertilising, and it is made up of storage liquid container or liquid storing pool, pipeline, imbibition device, imbibition material.Storage liquid container or liquid storing pool link to each other with imbibition device by pipeline, and imbibition material one end enters in the imbibition device, the other end be distributed in roots of plants around; Imbibition device buries near plant root, and imbibition material then buries around roots of plants; Be provided with the float plug in the imbibition device, can control the maximum height of aqueous solution liquid level in imbibition device of water or fertilizer automatically.This micro-irrigation device is not because the home and abroad produces, so use less.
Also have the anti-stifled single wall face porous slight irrigation pipe of a kind of low pressure, tubing also is that plastics are made, and the water outlet of pipe all is arranged in the one-sided of plastics tubing axial plane, and upwards spray in the aperture, forms 15～45 degree angles with horizontal plane, and the slight irrigation pipe is worked under the low pressure head.Equally, because punching can to a certain degree destroy the intensity of plastics tubing on the plastics tubing, when being squeezed, tapping at first is out of shape, water flowing in the influence pipe.
But because micropore is in open state always, be easy to be stopped up, and cause the infiltration function forfeiture by silt, and the pvc pipe insufficient strength, crush easily.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of polymer composites, it utilizes plastic cement and rubber to obtain for raw material foams, can carry out the micropore seepage, and micropore is opened automatically under certain pressure, micropore is closed automatically when not being stressed, and can avoid the silt blockage problem, and has enough the intensity opposing external world and internal pressure.
Polymer composites of the present invention, its technical scheme is: this polymer composites comprises 40～60% polyvinyl chloride, 15～30% paracril, 6～10% thermo-stabilizers, 16～24% softening agent and 1～4% whipping agent (% is weight ratio).
Wherein, the preferred group of described polymer composites becomes: comprise 45～50% polyvinyl chloride, 20～25% paracril, 7～9% thermo-stabilizers, 19～22% softening agent and 1～2% whipping agent (% is weight ratio).
The most preferred group of described polymer composites becomes: comprise 50% polyvinyl chloride, 20% paracril, 8% thermo-stabilizer, 20% softening agent and 2% whipping agent (% is weight ratio).
Because the thermo-sensitivity of polyvinyl chloride is outstanding, must add thermo-stabilizer in polymer composites, claims thermal stabilizer again, is used for stoping building-up process that Degradation takes place because of being heated.Can adopt among the present invention polyvinyl chloride synthetic in normally used thermo-stabilizer.As the Compositional type metallic salt, it is a most general type thermal stabilizing agent.Often sell with the prewired form of liquid, paste or powder.Kind commonly used has the higher fatty acid salt of barium-cadmium, barium-calcium-zinc, barium-zinc, calcium-zinc and calcium-magnesium-Ya tin-zinc.This type thermal stabilizing agent normal and organic auxiliary (as phosphorous acid esters, epoxy compounds, polyvalent alcohol and phenolic antioxidant etc.) and usefulness are formed the double matching type heat stabilizer that adapts to different complete processings and goods application requiring.
The softening agent that uses in the polymer composites can be a softening agent arbitrarily in the prior art, for example can be DOP (dioctyl phthalate (DOP)).
Whipping agent among the present invention can be pneumatogen or chemical foaming agent.
Whipping agent is to produce a large amount of gases under given conditions, makes product form the additive of continuous or discontinuous microporous type structure.According to the mode that produces gas, whipping agent can be divided into pneumatogen and chemical foaming agent two big classes.
Pneumatogen generally is tasteless, nontoxic rare gas element, or have good stability, low-boiling uninflammability liquid.Rare gas element commonly used has nitrogen, carbonic acid gas and air, and low-boiling point liquid commonly used has tetrachloroethane, methyl chloride and pentane etc.In addition, leachability solid chemical compound (as salt) also is the pneumatogen of using always.Pneumatogen is applicable to the foaming of polystyrene, polyethylene, polypropylene, polyvinyl chloride etc.Preferred gas whipping agent of the present invention.
Chemical foaming agent is at room temperature stable, and can decompose the compound that discharges a large amount of gases under the Rubber processing temperature, is widely used in the manufacturing of porous plastics.Industrial common chemical whipping agent is that liberating nitrogen is the organic compound of main gas phase composition and the bicarbonate of ammonia and the sodium bicarbonate that can decompose and discharge respectively ammonia or carbonic acid gas mostly.Chemical foaming agent is applicable to the foaming of various thermoplasticss more.
In order to reduce the decomposition temperature of chemical foaming agent, improve its dispersiveness and improve gas release, the also normal foamed promoter that uses a kind of energy activating chemical whipping agent, or claim blowing promotor, as Whitfield's ointment, urea etc.Also can use blowing promotor in the present invention.
The present invention provides the preparation method of this polymer composites on the other hand, this method comprises foams following component, described polymer composites component comprises: 40～60% polyvinyl chloride, 15～30% paracril, 6～10% thermo-stabilizers, 16～24% softening agent and 1～4% whipping agent (% is weight ratio).
Preparation method with polymer composites of preferred composition, comprise following component is foamed, described polymer composites component comprises: 45～50% polyvinyl chloride, 20～25% paracril, 7～9% thermo-stabilizers, 19～22% softening agent and 1～2% whipping agent (% is weight ratio).
The preparation method of polymer composites of the present invention mainly is foaming, can adopt general foaming method to carry out.According to the difference of whipping agent, adopt different foaming methods, as physical blowing method and chemical blowing process.Also can comprehensively use two kinds of methods.
In actually operating of the present invention, the physical blowing method is that the polymer composites component of the present invention except that whipping agent is carried out thorough mixing, insert in the forcing machine, it is temperature required that adjusting reaches this mixture dissolving, add pneumatogen in forcing machine, carry out physical blowing, the polymer composites after will foaming is then extruded, through the mold cools down moulding, can obtain finished product.
In actually operating of the present invention, chemical blowing process is that the polymer composites component of the present invention that comprises whipping agent is carried out thorough mixing, after making that mixing material is stirred to 80～100 ℃ uniformly softening point, insert in the forcing machine, it is temperature required that adjusting reaches this mixture melt, carries out chemical foaming, and the polymer composites after will foaming is then extruded, through the mold cools down moulding, can obtain finished product.
In aforesaid operations, can use common forcing machine, for example single screw extrusion machine or twin screw extruder.
Polymer composites of the present invention can be pressed into sheet as required, tubulose, or the shape of any needs.
Polymer composites of the present invention is particularly suited for preparing the micropore leaky pipe that is used to irrigate.
Polymer composites of the present invention has following advantage:
Plastic cement (polyethylene) and two kinds of components of rubber (paracril) have been added in the polymer composites of the present invention, because foamed plastic is functional, uniform in foaming, and the rub resistance of rubber is relatively good, so polymer composites of the present invention is an advantage of having concentrated both, has certain resistance to pressure, anti acid alkali performance, antifungal corrodibility, and the preparation product have irregular micropore, can be widely used in the preparation of agricultural fishery tubing.
Because polymer composites of the present invention itself possesses, form irregular micropore on the resulting product pipe walls, be suitable for preparing irrigating and already go up micropore leaky pipe commonly used.Not closed by (being normal temperature and pressure) micropore, when being subjected to certain ambient pressure, liquid in pipe or gas produce bulging force, bulging force makes liquid or gas expand outwardly by micropore, originally closed micropore can be opened in the time of expansion, liquid in pipe or gas flow out automatically, and can be along with the increase of pressure, and micropore diameter increases; The pipe internal pressure reduces or when not having, closes automatically under the characteristic that micropore expands, shrinks at material self, thereby stop effectively in the outer material inflow pipe of tube wall, has solved that micropore is easy to blocked shortcoming in the prior art.Make the micropore leaky pipe of polymer composites preparation of the present invention go for water saving irrigation, perhaps carry out pipeline fertilising, dispenser, pipeline oozes multiple farming, forestry, fishing industrial engineering (IE)s such as oxygen.
Be compared to prior art,, can not make product, and the micropore on it can coupler lock, is easy to be stopped up by silt, causes discarding of whole prod with irregular micropore if single use rubber pange.
And the product that is prepared by polymer composites of the present invention has certain resistance to pressure, anti acid alkali performance and mildew resistance, has good permeability under pressure, and therefore, polymer composites of the present invention has important application value.
Embodiment
In following examples, will further illustrate content of the present invention, but not limit the present invention with this.
The preparation of embodiment 1, polymer composites (1)
Raw material: polyvinyl chloride (tight type 3 types, the preparation of chemical plant, Liaoning)
Paracril (preparation of chemical plant, Maoming)
Barium-calcium-zinc type thermo-stabilizer (Beijing Chemical Plant's preparation)
DOP softening agent (Beijing Chemical Plant's preparation)
AC whipping agent (preparation of Jiangxi electrochemical factory)
With the 25kg polyvinyl chloride, the 10kg paracril, 4kg metallic soap type stablizer, 10kg oiliness softening agent and 2kgAC whipping agent are inserted in the homogenizer, fully mix 5 hours.Put into the constant temperature Banbury mixer then and continue to stir 50 minutes, 100 ℃ of whipping temps reach uniform softening temperature and powdering until mixing material, then mixing material are inserted in the forcing machine, and attemperation carries out chemical foaming about 160 ℃.After 2 hours, foam material is extruded, can be obtained polymer composites of the present invention.Through the tubular die moulding, can obtain wall thickness 2mm, the micropore leaky pipe finished product of caliber 1.2mm.
Can set different moulds as required, obtain the finished product of different size.Polymer composites of the present invention is mainly used in preparation micropore leaky pipe, thus set the tubular die of different wall, caliber, and then intercept different lengths, can obtain the micropore leaky pipe of different size.
The preparation of embodiment 2, polymer composites (2)
Raw material: polyvinyl chloride (tight type 5 types, the preparation of chemical plant, Liaoning)
Paracril (preparation of chemical plant, Maoming)
Calcium-zinc type stablizer (Beijing Chemical Plant's preparation)
DOA softening agent (Beijing Chemical Plant's preparation)
With the 20kg polyvinyl chloride, the 12kg paracril, 4kg metallic soap type stablizer, 9kg oiliness softening agent is inserted in the homogenizer, fully mixes 4 hours.Put into the constant temperature Banbury mixer then and continue to stir 40 minutes, 90 ℃ of whipping temps reach uniform softening temperature and powdering until mixing material, then mixing material is inserted in the forcing machine, attemperation charges into air in forcing machine about 150 ℃, carry out physical blowing.After 1 hour, foam material is extruded, can be obtained polymer composites of the present invention.Be pressed into sheet through mill, can obtain the micelle finished product.
Test example 1～5 all adopts the micropore leaky pipe of embodiment 1 preparation, thereby its every performance is detected.
Test example 1, resistance to pressure detect
Micropore leaky pipe sample is 6.0 salt acid soak 2 hours with the pH value, applies the pressure of 0.5Mpa then, observes sample and does not have breakage.
Therefore, the micropore leaky pipe of using polymer composites preparation of the present invention can bear the effect of elevated pressures under acidic conditions.
Test example 2, acid resistance, alkali resistance detect
Use the hydrochloric acid of pH=5.0 and pH=10.0NaOH solution soaking micropore leaky pipe sample 5 hours respectively.Observation sample outward appearance no change, microscopic examination sample structure no change.
Therefore, the micropore leaky pipe of application polymer composites preparation of the present invention has stronger resistance to acids and bases.
Test example 3, mildew resistance detect
Detection method: GB/T2423.16-1999 mildew
Test conditions: 32 ℃, 68%RH
Bacterial classification: aspergillus niger, terreus, Aureobasidium pullulans, paecilomyces varioti, light spore short handle broom is mould, conspicuous look mould, penicillium funiculosum, viride.
Test period: 28 days.
Sample through mould growth test in 28 days after the mildew degree be 2 utmost points, promptly naked eyes are obviously seen mildew, but at the coverage rate of sample surfaces less than 25%.
This test is the conclusion that draws as test with extreme conditions under emulation mode.Test in surroundings shows that the micropore leaky pipe of using polymer composites preparation of the present invention has extremely strong mildew resistance.
Test example 4, temperature are to the influence of micropore leaky pipe water percolating capacity
Test pressure (0.5 ± 0.07) MPa, sample length 300mm, 5 minutes time
The sample preparation condition: 80 ℃ * 120h ,-40 ℃ * 72h
The water percolating capacity detected result: 1.7g/minmm before handling, handle back 1.7g/minmm
Therefore, temperature seeps water for the micropore leaky pipe of using polymer composites preparation of the present invention and has no significant effect.
Test example 5, under simulated conditions to the influence of drug effect
Soup is selected the clear diluent of termite for use.The test insect is Taiwan formosanes (picking up from Guangzhou Zhongshan University campus).Testing tool is a gas chromatograph.Pressure: 0.5MPa.
Detect the termite soup through pressurization and the infiltration of micropore leaky pipe, the changing conditions of soup effective constituent and drug effect.
Test result:
Analysis of effective component (%): filter preceding 0.4303; Filter back 0.3944, difference is not remarkable.
Biological assay (KT50, minute): filter precedingly 29.5, filter back 31.5, difference is not remarkable.
Therefore, after the termite soup permeates through the micropore leaky pipe of using polymer composites preparation of the present invention, medicament effective constituent and drug effect no significant difference.
Claims (8)
1, a kind of polymer composites is characterized in that: comprise 40～60% polyvinyl chloride, and 15～30% paracril, 6～10% thermo-stabilizers, 16～24% softening agent and 1～4% whipping agent, wherein % is weight ratio.
2, the described polymer composites of claim 1 is characterized in that, comprises 45～50% polyvinyl chloride, 20～25% paracril, and 7～9% thermo-stabilizers, 19～22% softening agent and 1～2% whipping agent, wherein % is weight ratio.
3, the described polymer composites of claim 1 is characterized in that, comprises 50% polyvinyl chloride, 20% paracril, and 8% thermo-stabilizer, 20% softening agent and 2% whipping agent, wherein % is weight ratio.
4, claim 1,2 or 3 described polymer composites is characterized in that, described whipping agent is pneumatogen or chemical foaming agent.
5, the preparation method of the described polymer composites of claim 1, comprise following component is foamed, described polymer composites component comprises: 40～60% polyvinyl chloride, 15～30% paracril, 6～10% thermo-stabilizers, 16～24% softening agent and 1～4% whipping agent, wherein % is weight ratio.
6, the preparation method of the described polymer composites of claim 5 comprises following component is foamed that described polymer composites component comprises: 50% polyvinyl chloride, 20% paracril, 8% thermo-stabilizer, 20% softening agent, with 2% whipping agent, wherein % is weight ratio.
7, the preparation method of claim 5 or 6 described polymer composites, described foaming can be physical blowing or chemical foaming.
8, the micropore leaky pipe for preparing by any one described polymer composites of claim 1～4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410008422 CN1257936C (en) | 2004-03-10 | 2004-03-10 | Polymeric composite and preparation process and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410008422 CN1257936C (en) | 2004-03-10 | 2004-03-10 | Polymeric composite and preparation process and application thereof |
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| Publication Number | Publication Date |
|---|---|
| CN1560126A CN1560126A (en) | 2005-01-05 |
| CN1257936C true CN1257936C (en) | 2006-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410008422 Expired - Fee Related CN1257936C (en) | 2004-03-10 | 2004-03-10 | Polymeric composite and preparation process and application thereof |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295289C (en) * | 2005-03-30 | 2007-01-17 | 上海永利带业制造有限公司 | Priming sticking material for conveyer belt, preparation method and application thereof |
| CN102634131B (en) * | 2012-04-11 | 2014-06-18 | 深圳市新纶科技股份有限公司 | Low-density PVC (Poly Vinyl Chloride) injection-molded shoe material and preparation method thereof |
| CN102907294B (en) * | 2012-04-23 | 2014-10-29 | 深圳市鑫康沃科技开发有限公司 | Infiltrating micro-irrigation system |
| CN103804816A (en) * | 2012-11-13 | 2014-05-21 | 翁柳杰 | Seepage irrigation pipe and production method thereof |
| CN104844966B (en) * | 2015-05-14 | 2017-07-11 | 淮安市绿泉工贸有限公司 | A kind of special Self-sinking type sebific duct of aeration oxygen replenishing and its manufacture method |
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2004
- 2004-03-10 CN CN 200410008422 patent/CN1257936C/en not_active Expired - Fee Related
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| CN1560126A (en) | 2005-01-05 |
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Effective date of registration: 20091120 Address after: Guangdong province Foshan city Shunde District Daliang Lvtian thirteen Street eight Lane 1, room 1701, zip code: 528000 Patentee after: Xie Zhiwei Address before: Guangdong province Foshan city Shunde District Daliang Lvtian thirteen Street eight Lane 1, room 1701, zip code: 528000 Co-patentee before: Chen Guangping Patentee before: Xie Zhi Wei Co-patentee before: Zhu Weihua Co-patentee before: Zeng Zheng |
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