CN104005178B - A kind of polypropylene agricultural biological nonwoven and preparation method thereof - Google Patents
A kind of polypropylene agricultural biological nonwoven and preparation method thereof Download PDFInfo
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- CN104005178B CN104005178B CN201410235944.7A CN201410235944A CN104005178B CN 104005178 B CN104005178 B CN 104005178B CN 201410235944 A CN201410235944 A CN 201410235944A CN 104005178 B CN104005178 B CN 104005178B
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Abstract
The invention provides a kind of polypropylene agricultural biological nonwoven, described nonwoven is made up by meltblown of the raw material of following weight portion: polypropylene 71.90-78.15%; Pest repellant 2.15-3.95%; Degradation agent 1.30-2.15%; String 14.25-15.35%; Antioxidant 0-1.35%; Coupling agent 0-1.95%; Processing aid 0-3.65%; Its preparation method is: taking polypropylene PP as raw material, sneak into Vermins-proof and mosquito-driving master batch, through spray fusing technique, through steps such as cleaning, melting, filtration, one-tenth nets, obtain polypropylene agricultural biological nonwoven. The polypropylene agricultural biological nonwoven use cost of utilizing technology of the present invention to produce is low, has good expelling parasite and degradation function, can reduce the infringement of insect and the harm to environment, has and has wide range of applications, and market potential is huge, the advantage that economic benefit is good.
Description
Technical field
The present invention relates to agricultural nonwoven field, be specifically related to a kind of polypropylene agricultural biological nonwoven and preparation side thereofMethod.
Background technology
Plastics agricultural mulching has soil moisture conservation and heating effect to soil, thereupon for agricultural is brought volume increase good harvest, in ChinaBe described as agricultural upper collection chemical fertilizer and seed revolution for the third time afterwards. China is also that agricultural mulching is produced and used in the world at presentMeasure maximum countries, be 1.6 times of other All Countries use amount summations.
What agricultural mulching was good heat, and soil moisture conservation effect has been given birth to great, positive effect to Chinese Agricultural Production, but simultaneouslyAlong with popularizing of film-mulching technique, residual agricultural mulching has also brought a series of negative effect, a large amount of residual groundFilm destroy soil texture, damage to crops normal growth are grown and are caused crop production reduction, and then have influence on agricultural environment. This projectIntend a kind of polypropylene agricultural biological nonwoven of exploitation and substitute traditional mulch film and packaging material, to reduce in a large number soil and cropsEnvironmental pollution, there is expelling parasite simultaneously and keep away evil, improve crop yield and reduce agriculture production cost and alleviate peasant and work by forceDegree.
Summary of the invention
The object of the present invention is to provide a kind of polypropylene agricultural biological nonwoven, there is Degradable environment protection, to cropsHave heat, water conservation, insect protected, anti-grass, improve agricultural product quality and the low feature of price use cost.
For achieving the above object, the present invention has adopted following technical scheme:
A kind of polypropylene agricultural biological nonwoven, described nonwoven by the raw material of following weight portion by melt-blown legal systemBecome:
Polypropylene 71.90-78.15%;
Pest repellant 2.15-3.95%;
Degradation agent 1.30-2.15%;
String 14.25-15.35%;
Antioxidant 0-1.35%;
Coupling agent 0-1.95%;
Processing aid 0-3.65%;
Wherein: described antioxidant is selected from pentaerythritol resin, phosphite ester or thiodipropionate antioxidant extremelyFew a kind of, wherein, be preferably ditert-butylhydro quinone;
Described pest repellant is that plant extraction liquid and cordate telosma essential oil mix, described plant extraction liquid be lavender,A kind of or more than one extracts in matrine, Herba Andrographitis, peppermint extract;
Described degradation agent is light trigger or sensitising agent, is specially aromatic ketone, aromatic amine, ferric acetyl acetonade, 2-hydroxyl-4One or more of methyl acetophenone oxime iron, ferric stearate, wherein, are preferably 2-hydroxyl-4 methyl acetophenone oxime iron;
Described string is at least one in sugarcane, cornstalk, straw, rice straw, kaoliang stalk or reed stalk;
Described coupling agent is that aluminate coupling agent, silane coupler, maleic anhydride inoculated polypropylene coupling agent or rare earth are evenThe one of connection agent, wherein, is preferably VTES.
Further, described polypropylene for adopt polypropylene non-woven fabric reclaim powder, profax resin granular material, compatilizer andNucleator is prepared from, each part be in mass ratio: polypropylene non-woven fabric reclaims powder 5-50, profax resin granular material45-95, compatilizer 0.5-6, nucleator 0.2-2.0.
Further, described cordate telosma essential oil accounts for the 5-12% of pest repellant gross weight.
Further, described degradation agent is biodegradation agent, and wherein biomass content is more than 70%, and described living beings are beautifulOne or more of rice starch, potato starch or tapioca.
Further, described processing aid comprises bleeding agent and antistatic additive, and described antistatic additive is nonionic phosphoric acidEster class sylvite, solid content 35-45%, water 55-65%, described bleeding agent is non-ionic surface active agent.
Another object of the present invention is, a kind of preparation method of polypropylene agricultural biological nonwoven is provided, and it comprisesFollowing steps:
(1) pp material processing: the polypropylene masterbatch of carrying out after impurity separation is sent into stirring and washing in cleaning fluid, stirMix motor speed and be controlled at 35r/min, temperature remains on 30-35 DEG C, and masterbatch stops 10-15min in cleaning fluid;
Masterbatch after cleaning takes out from cleaning fluid, rinses well by deionized water, delivers to hopper-type by band conveyerAir drier carries out convection type and is dried, and dry temperature is 140～145 DEG C, and be 1～3h drying time;
(2) feed intake: by material according to formula: polypropylene 71.90-78.15%; Pest repellant 2.15-3.95%; Degradation agent1.30-2.15%; String 14.25-15.35%; Antioxidant 0-1.35%; Coupling agent 0-1.95%; Processing aidThe metering proportion of 0-3.65%, by suction system and injector, sends material formula to screw extruder, carries out preliminary mixingClose;
(3) melting: material enters into screw extruder from charge door, is pushed ahead material by screw rod; Material is frontEnter in process, temperature raises and melting gradually, makes fully to mix between material;
(4) filter: by fondant filter, the impurity in melt is filtered;
(5) become net: melt is measured accurately with measuring pump, and make operating pressure that melt produces 8-10MPa toFront propelling enters meltblown beam, distributes runner to be extruded by the spinneret orifice on die head through melt, and through the super times drawing-off of thermal current, fiber is coldBut solidify and be deposited on receiving system, be wound into net, obtain melt spraying non-woven fabrics.
Further, composition and the preparation method of described step (1) cleaning fluid are: water 89.4%, and tertiary sodium phosphate 0.6%,Laurate diethanol amine (87%) 3.0%, anhydrous sodium pyrophosphate 5.0%, first adds water in blending tank, then suitable by formulaOrder, adds each component successively, and limit edged stirs, until mix.
Further, the each district temperature control of described step (3) screw extruder 1-6 district is as follows:
1st district: 135-150 DEG C; 2nd district: 160-190 DEG C;
3rd district: 195-210 DEG C; 4th district: 210-220 DEG C;
5th district: 220-225 DEG C; 6th district: 220-225 DEG C;
Further, the temperature of described step (5) meltblown beam is controlled between 205 DEG C-225 DEG C.
Further, described step (5) hot gas pressure is controlled at 3-5MPa.
Further, described hot air temperature is controlled at 250-350 DEG C.
Compared with prior art, the polypropylene agricultural biological nonwoven use cost of utilizing technology of the present invention to produceLow, there is good degradation function, reduce the harm to environment, crops are had to the features such as insulation, damping, shading, expelling parasite, coverThe advantage such as Yield and quality and insect resistace of lid ensuing crop is fairly obvious, product can be widely used in raising rice seedlings, vegetable growing,Chinampa, soilless culture, fruit growing protective bag, agricultural base green material and looping material. Have and have wide range of applications, marketHave a high potential, the advantage that economic benefit is good.
Brief description of the drawings
Accompanying drawing 1 carries out insect esexpeling test figure for the present invention.
Test material, method and data statistics are as follows:
For having a try worm: trialeurodes vaporariorum, red spider, aphid, tree-of-heaven, locust, provide by Agricultural University Of South China.
Using method and statistics:
Adopt insect to force contact method test:
By the culture dish bottom at diameter 20cm for trial product, be respectively evenly laid in 2 fan-shaped regions, in culture dishWall coating tetrafluoroethylene, control examination worm escapes. Each input for 50 of a kind of insects of examination, timing does not have 4 hours and checks the examination of each regionBorer population amount (not containing dead examination worm) situation. Each examination worm respectively carries out 10 times repeats, and establishes contrast. Test statistics data are with manyGroup experimental data mean value calculation. The effect of sick borer population component analysis expelling parasite of the present invention on plant by experiment.
Experimental condition: 25 ± 1 DEG C of temperature, relative humidity 75 ± 5%.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described, should be understood that following examples are only for illustrating thisInvention but not for limiting scope of the present invention.
The experimental technique of unreceipted actual conditions in the following example, conventionally according to normal condition, or the bar that provides of manufacturerPart carries out.
The formula that table 1 is polypropylene agricultural biological nonwoven of the present invention:
Table 1:
| Embodiment | 1 | 2 | 3 | 4 | 5 | 6 |
| Polypropylene | 71.9 | 73.35 | 74.55 | 76.61 | 76.31 | 78.15 |
| Pest repellant | 3.85 | 3.72 | 3.55 | 3.95 | 2.75 | 2.15 |
| Degradation agent | 1.95 | 1.9 | 1.30 | 2.15 | 1.56 | 1.73 |
| String | 15.35 | 15.16 | 14.88 | 14.81 | 14.43 | 14.25 |
| Antioxidant | 1.35 | 0.92 | 0.98 | 0.95 | 0 | 1.32 |
| Coupling agent | 1.95 | 1.62 | 1.77 | 1.53 | 1.83 | 0 |
| Processing aid | 3.65 | 3.33 | 2.97 | 0 | 3.12 | 2.4 |
The preparation method of polypropylene agricultural biological nonwoven:
First to pp material processing: by carry out polypropylene masterbatch after impurity separation send in cleaning fluid, stir clearWash, mixer speed is controlled at 35r/min, and temperature remains on 30-35 DEG C, and masterbatch stops 10-15min in cleaning fluid;
Wherein said polypropylene masterbatch for adopt polypropylene non-woven fabric reclaim powder, profax resin granular material, compatilizer andNucleator is prepared from, each part be in mass ratio: polypropylene non-woven fabric reclaims powder 10-40, acrylic resin grainMaterial 60-77, compatilizer 1-3.
In above-mentioned steps, the composition of cleaning fluid and preparation method are: water 89.4%, tertiary sodium phosphate 0.6%, laurate twoMonoethanolamine (87%) 3.0%, anhydrous sodium pyrophosphate 5.0%, first adds water in blending tank, then presses formula order, by each groupDivide and add successively, limit edged stirs, until mix.
Polypropylene after cleaning takes out from cleaning fluid, rinses well by deionized water, delivers to hopper by band conveyerFormula air drier carries out convection type and is dried, and dry temperature is 140～145 DEG C, and be 1～3h drying time.
Described polypropylene is the polypropylene of melt index 180～350g/10min.
The melt-blown step of nonwoven is:
1, after each raw material is mixed in the ratio described in table 1, composite material is sent screw extruder to, carries out preliminary mixingClose;
Wherein, described pest repellant is that plant extraction liquid and cordate telosma essential oil mix, and described plant extraction liquid is to smokeA kind of or more than one extracts in clothing grass, matrine, Herba Andrographitis, peppermint extract;
Described degradation agent is light trigger or sensitising agent, is specially aromatic ketone, aromatic amine, ferric acetyl acetonade, 2-hydroxyl-4One or more of methyl acetophenone oxime iron, ferric stearate, wherein, are preferably 2-hydroxyl-4 methyl acetophenone oxime iron; Or, fallSeparate agent and adopt biodegradation agent, wherein biomass content is more than 70%, and living beings are cornstarch, potato starch or tapiocaOne or more.
Described string is at least one in sugarcane, cornstalk, straw, rice straw, kaoliang stalk or reed stalk;
Described coupling agent is that aluminate coupling agent, silane coupler, maleic anhydride inoculated polypropylene coupling agent or rare earth are evenThe one of connection agent, wherein, is preferably VTES;
Described processing aid comprises bleeding agent and antistatic additive, and described antistatic additive is nonionic phosphoric acid ester sylvite,Solid content 35-45%, water 55-65%, described bleeding agent is non-ionic surface active agent.
2, material enters into the screw channel of screw extruder from charge door, due to the rotation of screw rod, material is pushed ahead.Material is in the process of advancing, and temperature raises and melting gradually, makes fully to mix between material. Then distribute runner to arrive through meltThe spinneret orifice that reaches die head front end is extruded. The temperature control of each district of screw extruder 1-6 district is as follows:
1st district: 135-1150 DEG C; 2nd district: 100-190 DEG C;
3rd district: 195-210 DEG C; 4th district: 210-220 DEG C;
5th district: 220-225 DEG C; 6th district: 220-225 DEG C;
3, filter: by fondant filter, the impurity in melt is filtered;
4, become net: melt is measured accurately with measuring pump, and make operating pressure that melt produces 8-10MPa forwardPropelling enters meltblown beam, distributes runner to be extruded by the spinneret orifice on die head through melt, and through the super times drawing-off of thermal current, fiber is coolingSolidify and be deposited on receiving system, be wound into net, obtain melt spraying non-woven fabrics.
Gas jet pressure, gas temperature are listed in table 2.
Table 2:
| Embodiment | 1 | 2 | 3 | 4 | 5 | 6 |
| Die head temperature (DEG C) | 235 | 237 | 238 | 240 | 242 | 245 |
| Extruder temperature (DEG C) | 211 | 214 | 220 | 225 | 230 | 235 |
| Hot gas pressure (MPa) | 0.65 | 0.62 | 0.60 | 0.55 | 0.54 | 0.51 |
| Hot air temperature (DEG C) | 250 | 270 | 285 | 290 | 310 | 330 |
Expelling parasite experiment: various hexapeopoda pest sense of touch glands have very strong smell feeling ability to external world, and insect fears mostSmell is " cordate telosma ", " peppermint " " camphor " etc., and they have obvious repellent action to insect, avoids insect to cropsInfringement. In this non-woven fabrics fiber, the content of " cordate telosma essential oil " and other plant extraction liquids is very low, but owing to being deep into fibreAmong dimension, form a positive negative fluxfield that contains slight peat-reek in a big way, played a kind of work of pest repellingWith.
The nonwoven sample obtaining with embodiment 1 carries out insect and forces contact method test, and result is referring to Fig. 1:
As shown in Figure 1, the abscissa of Fig. 1 is the title of the sick worm of crop to result, and ordinate is that the quantity of the sick worm of crop is (singlePosition: only), can be as seen from Figure 1, use on the experimental plant of non-textile mulch of the present invention sick borer population amount obviously lower.
Growth experiment: the nonwoven sample obtaining with embodiment 1 carries out field planting contrast test, result is as table 3 and table4：
Table 3:
Table 4:
Known by table 3 and table 4, use the present invention and common agricultural nonwoven to the growing state of crop almost without shadowRing, on the contrary, because the present invention has effect of expelling parasite, can effectively reduce the impact of disease and pest, contribute to increase output.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention, everyly utilize thisThe equivalent structure that bright description is done or the conversion of equivalent flow process, or be directly or indirectly used in other relevant technology necksTerritory, is all in like manner included in scope of patent protection of the present invention.
Claims (8)
1. a polypropylene agricultural biological nonwoven, is characterized in that: described nonwoven is passed through by the raw material of following weight portionMeltblown is made:
Polypropylene 71.90-78.15%;
Pest repellant 2.15-3.95%;
Degradation agent 1.30-2.15%;
String 14.25-15.35%;
Antioxidant 0-1.35%;
Coupling agent 0-1.95%;
Processing aid 0-3.65%;
Wherein:
Described antioxidant is selected from least one in pentaerythritol resin, phosphite ester or thiodipropionate antioxidant;
Described pest repellant is that plant extraction liquid and cordate telosma essential oil mix, and described plant extraction liquid is lavender, kuh-sengA kind of or more than one extracts in alkali, Herba Andrographitis, peppermint extract;
Described degradation agent is light trigger or sensitising agent, is specially aromatic ketone, aromatic amine, ferric acetyl acetonade, 2-hydroxy-4-methylOne or more of acetophenone oxime iron, ferric stearate;
Described string is at least one in sugarcane, cornstalk, straw, rice straw, kaoliang stalk or reed stalk;
Described coupling agent is aluminate coupling agent, silane coupler, maleic anhydride inoculated polypropylene coupling agent or rare-earth coupling agentOne.
2. polypropylene agricultural biological nonwoven according to claim 1, is characterized in that: described polypropylene is for adopting poly-thirdAlkene nonwoven reclaims powder, profax resin granular material, compatilizer and nucleator and is prepared from, and each part in mass ratioFor: polypropylene non-woven fabric reclaims powder 10-40, profax resin granular material 60-75, compatilizer 1.5-3.
3. polypropylene agricultural biological nonwoven according to claim 1, is characterized in that: described cordate telosma essential oil accounts for and drivesThe 5-12% of worm agent gross weight.
4. polypropylene agricultural biological nonwoven according to claim 1, is characterized in that: described degradation agent is biodegradationAgent, wherein biomass content is more than 70%, and described living beings are a kind of or several of cornstarch, potato starch or tapiocaKind.
5. a polypropylene agricultural biological nonwoven, is characterized in that: described nonwoven is passed through by the raw material of following weight portionMeltblown is made:
Polypropylene 71.90-77.10%;
Pest repellant 2.22-3.95%;
Degradation agent 1.53-2.15%;
String 14.33-15.35%;
Antioxidant 0.85-1.35%;
Coupling agent 1.57-1.95%;
Processing aid 2.40-3.65%;
Wherein: described antioxidant is ditert-butylhydro quinone;
Described pest repellant is for to be mixed by plant extraction liquid and cordate telosma essential oil, and described plant extraction liquid is peppermint extractionLiquid, described cordate telosma essential oil accounts for the 5-12% of pest repellant gross weight;
Described degradation agent is 2-hydroxyl-4 methyl acetophenone oxime iron;
Described string is reed stalk;
Described coupling agent is maleic anhydride inoculated polypropylene coupling agent.
6. prepare a preparation method for the polypropylene agricultural biological nonwoven described in any one in claim 1-4, its spyLevy and be: comprise the steps:
(1) pp material processing: the polypropylene masterbatch of carrying out after impurity separation is sent into stirring and washing in cleaning fluid, mixerSpeed is controlled at 35r/min, and temperature remains on 30-35 DEG C, and masterbatch stops 10-15min in cleaning fluid;
Masterbatch after cleaning takes out from cleaning fluid, rinses well by deionized water, delivers to hopper-type hot blast by band conveyerDrying machine carries out convection type and is dried, and dry temperature is 140～145 DEG C, and be 1～3h drying time;
(2) feed intake: by material according to formula: polypropylene 71.90-78.15%; Pest repellant 2.15-3.95%; Degradation agent 1.30-2.15%; String 14.25-15.35%; Antioxidant 0-1.35%; Coupling agent 0-1.95%; Processing aid 0-3.65%Metering proportion, by suction system and injector, send material formula to screw extruder, carry out preliminary mixing;
(3) melting: material enters into screw extruder from charge door, is pushed ahead material by screw rod; Material was advancingCheng Zhong, temperature raises and melting gradually, makes fully to mix between material;
(4) filter: by fondant filter, the impurity in melt is filtered;
(5) become net: melt is measured accurately with measuring pump, and the operating pressure that makes melt produce 8-10MPa pushes away forwardEnter meltblown beam, distribute runner to be extruded by the spinneret orifice on die head through melt, through the super times drawing-off of thermal current, fiber is cooling solidChange and be deposited on receiving system, be wound into net, obtain melt spraying non-woven fabrics.
7. the preparation method of polypropylene agricultural biological nonwoven according to claim 6, is characterized in that: described melt blown dieThe temperature of head is controlled between 205 DEG C-225 DEG C; Described hot gas pressure is controlled at 3-5MPa.
8. the preparation method of polypropylene agricultural biological nonwoven according to claim 6, is characterized in that: described step(3) the temperature control of each district of screw extruder 1-6 district is as follows:
1st district: 135-150 DEG C; 2nd district: 160-190 DEG C;
3rd district: 195-210 DEG C; 4th district: 210-220 DEG C;
5th district: 220-225 DEG C; 6th district: 220-225 DEG C.
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| CN1966582A (en) * | 2006-10-10 | 2007-05-23 | 新疆屯河型材有限公司 | Wood-plastic composite section bar |
| CN102560891A (en) * | 2011-12-19 | 2012-07-11 | 安吉振兴布业有限公司 | Method for preparing degradable hemp agricultural mulching material |
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