CN103254535A - Agricultural weeding film and preparation method thereof - Google Patents
Agricultural weeding film and preparation method thereof Download PDFInfo
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- CN103254535A CN103254535A CN2013102127248A CN201310212724A CN103254535A CN 103254535 A CN103254535 A CN 103254535A CN 2013102127248 A CN2013102127248 A CN 2013102127248A CN 201310212724 A CN201310212724 A CN 201310212724A CN 103254535 A CN103254535 A CN 103254535A
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- polyvinyl alcohol
- weeding film
- film
- farm weeding
- weedicide
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Abstract
The invention relates to an agricultural weeding film which is made of polyvinyl alcohol. The agricultural weeding film further comprises a weed killer, a plasticizer, an active agent and a cross-linking agent, wherein the weed killer is evenly distributed in the agricultural weeding film; glycerin or ethylene glycol serves as the plasticizer; washing powder or a detergent serves as the active agent; and Tween 80 serves as the cross-linking agent. The agricultural weeding film comprises the following materials by weight percent: 60% to 90% of polyvinyl alcohol, 4% to 23% of weed killer, 0.3% to 0.9% of cross-linking agent, 0.5% to 1.4% of plasticizer and 1% to 3% of active agent. After the agricultural weeding film is paved, the weed killer is evenly dissolved on the leaf surfaces of weeds under the action of rain water, so that the weed killer and the rain water are dissolved and transferred into the bud tips, the stems, the leaves and the rootstocks of the weeds together; and thus the weed killer and the rain water enter the bodies of the weeds in an inner-absorption conducting manner. Therefore, plant cells are killed due to the occurrence of physiological and morphologic changes. As a result, the weeding purpose is realized. In addition, the weed killer cannot splash onto food crops, i.e., the pesticide residue is avoided.
Description
Technical field
The present invention relates to a kind of farm weeding film and preparation method thereof.
Background technology
Development along with economic society, industrial or agricultural " price scissors " is dwindled gradually, but in the agriculture production in recent years of many rural areas, begun to experience the pressure of " young labor force " shortage, and agricultural is the basic industry of China, China has become weedicide first big producing country, and 2011 (1-12) month former drug prods of national weedicide has reached 117.47 ten thousand tons.Yet in use, need convert water dissolution and just can carry out weed sprays or spraying soil treatment after evenly.Both time-consuming, effort along with people engaged in agriculture's aging continues to increase, to improving the demand that China's weedicide kind and structure adapt to agriculture production, has caused the attention of national departments concerned again.At present, the weed removal mulch film that has been applied in the agriculture production mainly contains two types, the first kind is: with high pressure polyethylene resin, linear low density polyethylene resin is that base-material adds black agglomerate and oxidation inhibitor, UV light absorber through inflation film manufacturing machine production and black polyethylene film, (cover on soil or the weeds, make weeds carry out photosynthesis and death).Widespread use in high-efficiency agriculture is produced owing to do not contain weedicide, is not therefore discussed in the present invention.Second type is: based on water-fast polyethylene, weedicide, auxiliary agent and resin are made master batch blowing film forming.This ground film production process is simple, and facility investment is few, produces the equipment of common ground film and all can produce.As: the patent No. is [90105349], and multifunctional membrane and preparation method are exactly this type of weeding film.Its advantage is because water insoluble, has water conservation, protects fertilizer, the effect of insulation.Shortcoming is just because of it is water insoluble, just cause the increasing formation of remaining plastics film " white pollution ", the Cotton Production district per hectare " white pollution " that has is up to more than 794 kilograms, and a century is not changed, and the trend that rises is year by year arranged, become environmental issue anxious to be solved.But existing above-mentioned two kinds of weed removal mulch films to the mode that " white pollution " problem of environment solves are: a kind of is to carry out on-site incineration, and another kind is handled when natural force (illumination, rainwater, microorganism) and artificial machinery arable land.According to pertinent data statistics, China's plastic agricultural film output and usage quantity two worlds the first, roughly be equivalent to 1.6 times of other national summation of the world.There is every year up to a million tons plastic garbage to produce.
Summary of the invention
The object of the present invention is to provide a kind of water-soluble farm weeding film with weeding function, it comprises,
A kind of farm weeding film, its material are polyvinyl alcohol, and the material of described farm weeding film also comprises weedicide.
On the basis of technique scheme, described weedicide is uniformly distributed in the described farm weeding film.
On the basis of technique scheme, the material of described farm weeding film also comprises softening agent, and promoting agent, linking agent, described softening agent are glycerine or ethylene glycol, and described promoting agent is washing powder or washing composition, and described linking agent is tween 80.
On the basis of technique scheme, the material of described farm weeding film comprises the polyvinyl alcohol of 60-90% weight percent, the weedicide of 4-23% weight percent, the linking agent of 0.3-0.9% weight percent, the softening agent of 0.5-1.4% weight percent, the promoting agent of 1-3% weight percent.
On the basis of technique scheme, described polyvinyl alcohol is that the polymerization degree is 1700, and alcoholysis degree is one or both combinations wherein of 88%-99% polyvinyl alcohol.
On the basis of technique scheme, described polyvinyl alcohol is the mixture of polyvinyl alcohol 1788 and polyvinyl alcohol 1799, and adjusts the water-soluble speed of described farm weeding film by the ratio of adjusting polyvinyl alcohol 1788 and polyvinyl alcohol 1799.
On the basis of technique scheme, described weedicide is made up of in different ratios one or both of interior absorption conduction weedicide or the compound weedicide of tagging.
On the basis of technique scheme, described farm weeding film contains weedicide 0.13-0.47 gram for every square metre.
The present invention also provides a kind of preparation method of farm weeding film, described method comprises the polyvinyl alcohol 1788 and polyvinyl alcohol 1799 mixtures with 60-90 part, carry out water-bath and put into homogenizer, be warmed up to 70-80 ℃ simultaneously during stirring, the ethylene glycol or the glycerine that slowly add 0.5-1.4 part again, stirring at low speed 10min-120min, temperature control is between 80-110 ℃, treat to add 0.3-0.9 part tween again after softening agent is fully absorbed, 1-3 part washing powder or washing composition, mix, add again and make master batch after 4-23 part weedicide part mixes, by forcing machine the master batch blow molding is prepared into the farm weeding film at last.
Compared with prior art, the present invention is durable, and the safe and reliable user of allowing causes polluting the weedicide of poisoning away from meeting, and save time, laborsaving, work easily, can attract the youngster to participate in work.A kind of weed removal mulch film of water-soluble degraded voluntarily after the purpose that reaches weeding simultaneously.At the bottom of the weed removal mulch film cost of the present invention, herbicidal effect is good, and technical requirements is low, and noiselessness pollutes, and is little to secondary environmental pollution, to the healthy almost harmless advantage of user, can not splash on the alimentary crop body but also have, causes pesticide residue.Therefore the present invention is at present efficient weeding, low cost, and few environmental pollution provides new weeding kind and a structure.
[embodiment]
A kind of farm weeding film, its material are polyvinyl alcohol, and the material of described farm weeding film also comprises weedicide.Weedicide is uniformly distributed in the described farm weeding film.The material of farm weeding film also comprises softening agent, and promoting agent, linking agent, described softening agent are glycerine or ethylene glycol, and described promoting agent is washing powder or washing composition, and described linking agent is tween 80.The material of farm weeding film comprises the polyvinyl alcohol of 60-90% weight percent, the weedicide of 4-23% weight percent, the linking agent of 0.3-0.9% weight percent, the softening agent of 0.5-1.4% weight percent, the promoting agent of 1-3% weight percent.Polyvinyl alcohol is that the polymerization degree is 1700, and alcoholysis degree is one or both combinations wherein of 88%-99% polyvinyl alcohol.Polyvinyl alcohol is the mixture of polyvinyl alcohol 1788 and polyvinyl alcohol 1799, and adjusts the water-soluble speed of described farm weeding film by the ratio of adjusting polyvinyl alcohol 1788 and polyvinyl alcohol 1799.Weedicide is made up of in different ratios one or both of interior absorption conduction weedicide or the compound weedicide of tagging.The binary preparation or the ternary preparation that make by different proportionings are used for film and cover weeds and meet the purpose that rainwater reaches weeding after instant, enlarge and kill the grass spectrum.And the farm weeding film contains weedicide 0.13-0.47 gram for every square metre.
Introduce the preparation method of farm weeding film of the present invention below, method comprises the polyvinyl alcohol 1788 and polyvinyl alcohol 1799 mixtures with 60-90 part, carry out water-bath and put into homogenizer, be warmed up to 70-80 ℃ simultaneously during stirring, the ethylene glycol or the glycerine that slowly add 0.5-1.4 part again, stirring at low speed 10min-120min, temperature control is between 80-110 ℃, treat to add 0.3-0.9 part tween again after softening agent is fully absorbed, 1-3 part washing powder or washing composition, mix, add again and make master batch after 4-23 part weedicide part mixes, by forcing machine the master batch blow molding is prepared into the farm weeding film at last.
Because the polyvinyl alcohol water soluble, and the polyvinyl alcohol molecular weight is greater than the herbicide molecular amount, and herbicide molecular is uniformly distributed between the polyvinyl alcohol molecule, forms the herbicide molecular layer.After the farm weeding film is laid, by means of the even action of rainwater weedicide is dissolved on the weeds blade face.Make weedicide with the bud point of rainwater solution transfer to weeds, cauline leaf, positions such as rhizome enter in the weeds body by interior suction conduction, make vegetable cell generation physiological change and metamorphosis and death, reach the order of weeding.Simultaneously, farm weeding film of the present invention need not be regained after using, and it is easy to use, and because drug distribution is even, with the rainwater dissolving, can not cause the weedicide poisoning.
By test, the weeding ratio that uses weeding film of the present invention is about 3 times of the traditional spray weeding ratio, and cost reduction 130%-180%.
Claims (9)
1. farm weeding film, its material is polyvinyl alcohol, it is characterized in that: the material of described farm weeding film also comprises weedicide.
2. a kind of farm weeding film as claimed in claim 1, it is characterized in that: described weedicide is uniformly distributed in the described farm weeding film.
3. a kind of farm weeding film as claimed in claim 1, it is characterized in that: the material of described farm weeding film also comprises softening agent, and promoting agent, linking agent, described softening agent are glycerine or ethylene glycol, described promoting agent is washing powder or washing composition, and described linking agent is tween 80.
4. a kind of farm weeding film as claimed in claim 3, it is characterized in that: the material of described farm weeding film comprises the polyvinyl alcohol of 60-90% weight percent, the weedicide of 4-23% weight percent, the linking agent of 0.3-0.9% weight percent, the softening agent of 0.5-1.4% weight percent, the promoting agent of 1-3% weight percent.
5. a kind of farm weeding film as claimed in claim 1, it is characterized in that: described polyvinyl alcohol is that the polymerization degree is 1700, alcoholysis degree is one or both combinations wherein of 88%-99% polyvinyl alcohol.
6. a kind of farm weeding film as claimed in claim 5, it is characterized in that: described polyvinyl alcohol is the mixture of polyvinyl alcohol 1788 and polyvinyl alcohol 1799, and adjusts the water-soluble speed of described farm weeding film by the ratio of adjusting polyvinyl alcohol 1788 and polyvinyl alcohol 1799.
7. a kind of farm weeding film as claimed in claim 1 is characterized in that: described weedicide is made up of in different ratios one or both of interior absorption conduction weedicide or the compound weedicide of tagging.
8. a kind of farm weeding film as claimed in claim 1 is characterized in that: described farm weeding film contains weedicide 0.13-0.47 gram for every square metre.
9. the preparation method of a farm weeding film, it is characterized in that: described method comprises the polyvinyl alcohol 1788 and polyvinyl alcohol 1799 mixtures with 60-90 part, carry out water-bath and put into homogenizer, be warmed up to 70-80 ℃ simultaneously during stirring, the ethylene glycol or the glycerine that slowly add 0.5-1.4 part again, stirring at low speed 10min-120min, temperature control is between 80-110 ℃, treat to add 0.3-0.9 part tween again after softening agent is fully absorbed, 1-3 part washing powder or washing composition, mix, add again and make master batch after 4-23 part weedicide part mixes, by forcing machine the master batch blow molding is prepared into the farm weeding film at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102127248A CN103254535A (en) | 2013-06-01 | 2013-06-01 | Agricultural weeding film and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102127248A CN103254535A (en) | 2013-06-01 | 2013-06-01 | Agricultural weeding film and preparation method thereof |
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| CN103254535A true CN103254535A (en) | 2013-08-21 |
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| CN2013102127248A Pending CN103254535A (en) | 2013-06-01 | 2013-06-01 | Agricultural weeding film and preparation method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1155557A (en) * | 1996-10-30 | 1997-07-30 | 甘肃省兰州市农业科学研究所 | Herbicide plastic film covered on field |
| CN102391530A (en) * | 2011-06-29 | 2012-03-28 | 郝喜海 | Method for manufacturing polyvinyl alcohol slow/controlled release film |
-
2013
- 2013-06-01 CN CN2013102127248A patent/CN103254535A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1155557A (en) * | 1996-10-30 | 1997-07-30 | 甘肃省兰州市农业科学研究所 | Herbicide plastic film covered on field |
| CN102391530A (en) * | 2011-06-29 | 2012-03-28 | 郝喜海 | Method for manufacturing polyvinyl alcohol slow/controlled release film |
Non-Patent Citations (3)
| Title |
|---|
| 王化冰主编: "《济青高速公路绿化手册》", 31 August 2010, article "除草剂的分类及使用方法", pages: 314 * |
| 苑会林: "聚乙烯醇吹膜加工性能研究", 《塑料工业》, vol. 31, no. 9, 30 September 2003 (2003-09-30), pages 23 * |
| 陈志周，等: "聚乙烯醇水溶性薄膜生产工艺研究", 《农业工程学报》, vol. 24, no. 7, 31 July 2008 (2008-07-31), pages 247 - 250 * |
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Application publication date: 20130821 |