CN1058028A - A kind of straw fiber agricultural film and manufacture method thereof - Google Patents
A kind of straw fiber agricultural film and manufacture method thereof Download PDFInfo
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- CN1058028A CN1058028A CN 90103061 CN90103061A CN1058028A CN 1058028 A CN1058028 A CN 1058028A CN 90103061 CN90103061 CN 90103061 CN 90103061 A CN90103061 A CN 90103061A CN 1058028 A CN1058028 A CN 1058028A
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- straw fiber
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Abstract
The present invention is straw fiber agricultural film and manufacture method thereof, adopt straw fiber such as straw, wheat straw or other Gramineae wild plants cheap and extensively source to make diffusing wet pulp (paper pulp), make viscose glue and also further make film with special processing unit and the method wet pulp of will loosing as raw material.
This film not only have use strong multiple and anti-folding, anti-Japanese solarization to drench with rain, not have residual hazard pollution-free, performances such as insulation soil moisture conservation, and fragment stay in the soil can be by soil microorganisms-fall and can absorb, increase soil fertility, solved with artificial synthetic macromolecule plastics film covering farm land, not being decomposed in the fragment satholith absorbs and causes the destroyed difficult problem that influences crop growth of Soil structure.
Description
Insulation soil moisture conservation for the soil plantation strengthens fertility, shortens the crop growth ripening stage, just applies the synthetic macromolecule plastic film in the topped farmland of low temperature season as far back as the 60-70 age abroad, reaches effect of increasing production.China began to adopt this modern technique in 1978, large scale application agricultural mulching technology on agricultural has particularly become a vital measure of China's agricultural produce.From China's practice situation, be used for the plastics film in the agricultural, comprise various farm crop awning films, the hut film of seedling, the usefulness that plants vegetables, film that fruit tree is used or the like, having subject matter is all to have every year film to use the film fragments of 1/3rd quantity of total amount to remain in the soil approximately, and these plastics film fragments are difficult for being decomposed absorption by soil bacteria, have destroyed Soil structure, the wicking action of cutting off soil moisture has had a strong impact on the normal growth of farm-forestry crop.The end of the seventies, abroad succeeded in developing with starch etc. do raw material film of new generation, solved and be difficult for the problem that absorbed by soil and bacterium in the fragment satholith, but these films are raw materials used is not to use straw fiber, but does raw material with grain or wood pulp, short velveteen, applies being restricted.
Purpose of the present invention adopts straw fiber (as straw, wheat straw or other Gramineae wild plants etc.) to do raw material exactly, use special processing method to produce the novel thin film that can be absorbed and have certain use properties by soil microbial degradation, specific practice is that the alpha-cellulose in the straw fiber is made viscose glue by certain method, then viscose glue is sprayed into film, and makes it reach the performance requriements of use by special art breading film.
Summary of the invention is as follows:
(1) preparation of viscose glue:
(1) straw fiber is made diffusing wet pulp.
(2) wet pulp of will loosing is dewatered with centrigugal swing dryer or extrusion machine, and the water content of the wet pulp of loosing is controlled in the 50-80% scope.
(3) caustic dip: the diffusing wet pulp after the dehydration is the caustic soda soln of 18-24% with concentration, adds a spot of polyoxy ethane (as 0.05-0.30%) immersion and stirring 1-1.5 hour, makes it become alkali fiber, carries out the caustic dip second time again after extruding or the drying.The caustic dip strength of solution is controlled in the 11-14% scope for the second time, soaks 2-10 minute.
(4) squeezing: when entering squeezing process through the soda cellulose behind twice caustic dip, press ratio is controlled at 2-3 and is advisable, and the method for squeezing can hand, also can mechanical oil-pressure.
(5) pulverize: soda cellulose is pulverized with pulverizer, and it is 3-4 that degree of grinding is controlled at granularity
Mm
(6) experienced: the soda cellulose after will pulverizing was deposited in room temperature environment 12-20 hour, and often stirred, and its cellulosic degree of polymerization is reduced and distributes moderately, was beneficial to and improved the quality.
(7) sulfonation and dissolving:
Under the situation that soda cellulose after experienced constantly stirs in room temperature environment and vacuum tightness under the condition of mercury column more than 600 millimeters, add proper C S
2Carried out sulfonation 1.5-2.5 hour, and formed cellulose sulfonate, dissolve then.
Dissolving divides two stages to carry out.Alkaline solution with 10% left and right sides concentration carries out dissolving just earlier, stirs simultaneously, and dilute with water after 2 hours makes rare the amassing of cellulose ester contain alpha-cellulose below 10% to alkalinity 4-8.5%, then carries out the back dissolving.Back its method of dissolving is to add softening agent such as 3-C in the dissolver of back
8The ester class stirred 3-4 hour, and the alpha-cellulose viscose glue is fully dissolved, and obtained faint yellow thickness body, reached fall-ball type viscosity for to get final product less than 98 seconds.
(8) filter: the viscose glue after the sulfonation dissolving is carried out coarse filtration with nylon cloth, with rich smart filtration of double-sided plush, remove impurity then.
(9) deaeration maturation: the viscose glue after the filtration contains a large amount of bubbles, carries out deaeration with the method that vacuumizes.Carry out maturation after the deaeration, make rubber age glue.Maturation time GPRS is good, 14-20 ℃ of temperature, generally is controlled between 30-48 hour.
Enter film formation process after the maturation at once.
The process flow sheet of viscose glue preparation is shown in accompanying drawing one.
Required drier or extrusion machine in each operation of viscose glue preparation, caustic dip machine, pulverizer, experienced sulfonation machine, back dissolver, filter, equipment such as deaeration ripening machine can be selected existing installation for use, also can manufacture and design viscose glue of specific equipment composition and prepare movement system.
(2) film forming: the film-forming process flow process is shown in accompanying drawing two.
(1) spray lip: the spray lip is the critical process that controlling diaphragm thickness, amplitude and face have or not fault and streak.Narrow slit is controlled at 0.15-0.25
MmBetween.
(2) precipitation bath: form solution by sulfuric acid and sodium sulfate, sulfuric acid content 80-140 grams per liter, sodium sulfate 160-240 grams per liter gets final product.Temperature is controlled in 40 ℃ of-50 ℃ of scopes.
(3) regeneration is bathed: body lotion is a sulphuric acid soln, and content is the 60-100 grams per liter, and temperature is in 40 ℃ of-70 ℃ of scopes.
(4) washing: wash with clear water, water temperature is controlled in 50 ℃ of-60 ℃ of scopes.
(5) desulfurization: put into 0.15-1.5 grams per liter NaOH and 0.2-0.4%C in the desulfurizer
3-C
8Solution such as ester class, temperature is controlled in the 70-80 ℃ of scope.
(6) washing: about 40 ℃ of water temperatures.
(7) bleaching: the chlorine bleach liquor with chlorosity 1-1.5 grams per liter bleaches, and water temperature is no more than 30 ℃.
(8) washing: water temperature is no more than 40 ℃.
(9) plasticizing: plastify through two plasticizing grooves, first road plasticizing groove is stearic acid (lipid acid) alkali aluminate solution, and alkali concn is 1.5-2.0%.Second road plasticizing groove solution is made up of phosphorus benzene bis-acid potassium dioctyl ester (or two esters of phosphorus benzene bis-acid potassium) and silicon solution (2%).
(10) oven dry: front setting cylinder temperature is about 45 ℃-50 ℃, and the centre can reach 60-70 ℃, and back cylinder temperature is 40-50 ℃, and the cylinder film that formalizes at last returns gradually, and room temperature gets final product.
Above-mentioned film forming each procedure can be selected existing film-forming apparatus for use, also can manufacture and design special-purpose film-forming apparatus, forms a film shaping movement system and finishes the film forming task.
The film that manufacturing of the present invention is come out not only have the required every use properties of agricultural film, and it is pollution-free not have residual hazard, fragment can be absorbed by soil and bacterial degradation, increased the fertility of soil, simultaneously since film to become part hydrophobic by hydrophilic, improved film insulation soil moisture conservation.Straw fiber starting material wide material sources required for the present invention, cheap, the returns of investment height.
Claims (5)
1, a kind of straw fiber agricultural comprise preparation and film forming two portions of viscose glue with film and manufacture method thereof.The preparation of viscose glue is begun by diffusing wet pulp, through dehydration → caustic dip → squeezing pulverizing → experienced sulfonation → dissolving → filtration → deaeration → operations such as maturation, film forming is made up of spray lip → precipitation bath → regeneration desire → washing → desulfurization → washing → bleaching → washing → plasticizing → operations such as oven dry, and technical characteristic of the present invention is: wet pulp raw material selection straw fiber looses.
2, straw fiber agricultural according to claim 1 is characterized in that wet pulp raw material selection straw, wheat straw or other Gramineae wild plants with film and manufacture method thereof.
3, according to claim 1 and 2 described straw fiber agricultural film and manufacture method thereof, it is characterized in that: caustic dip adds a spot of polyoxy ethane in alkaline solution for the first time, and caustic dip carried out stir about 1-1.5 hour simultaneously.The used alkaline concentration of caustic dip is than for the first time little for the second time, and the caustic dip time is short.
4, according to claim 1 and 2 described straw fiber agricultural film and manufacture method thereof, it is characterized in that:
When dissolving after the experienced sulfonation, be that about 10% alkaline solution carries out dissolving just with concentration earlier, dissolving is just stirred simultaneously, and dilute with water after 2 hours carries out the back then and dissolves.When dissolving, the back adds softening agent such as C
3-C
8Ester class and toughener such as formaldehyde etc. stirred 3-4 hour, formed faint yellow thickness body, entered operations such as filtering deaeration and maturation then.
5, according to claim 1 and 2 described straw fiber agricultural film and manufacture method thereof, it is characterized in that:
Viscose glue prepares each operation finish after, enter film forming at once.When in film process, entering desulfurization process, add 0.5-1.5%, NaOH, 0.2-0.4%C
3-C
8Solution such as ester class and 0.5-2.0% metallic soap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90103061 CN1021116C (en) | 1990-06-26 | 1990-06-26 | Grass-fibre film used in agriculture and forestry and making method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90103061 CN1021116C (en) | 1990-06-26 | 1990-06-26 | Grass-fibre film used in agriculture and forestry and making method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1058028A true CN1058028A (en) | 1992-01-22 |
| CN1021116C CN1021116C (en) | 1993-06-09 |
Family
ID=4877893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90103061 Expired - Fee Related CN1021116C (en) | 1990-06-26 | 1990-06-26 | Grass-fibre film used in agriculture and forestry and making method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1021116C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001072131A1 (en) * | 2000-03-31 | 2001-10-04 | Yuen Foong Yu Paper Mfg Co., Ltd. | A method for preventing plant disease |
| CN1302160C (en) * | 2005-01-04 | 2007-02-28 | 陈建旭 | Production of fibre from plant stem |
| CN101153207B (en) * | 2007-09-17 | 2010-05-19 | 潍坊恒联玻璃纸有限公司 | Method for manufacturing film special for rubber belt |
| CN104072810A (en) * | 2014-04-30 | 2014-10-01 | 新疆元泰新材料有限公司 | Production process of photoelectric biomass cellulose membrane |
-
1990
- 1990-06-26 CN CN 90103061 patent/CN1021116C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001072131A1 (en) * | 2000-03-31 | 2001-10-04 | Yuen Foong Yu Paper Mfg Co., Ltd. | A method for preventing plant disease |
| CN1302160C (en) * | 2005-01-04 | 2007-02-28 | 陈建旭 | Production of fibre from plant stem |
| CN101153207B (en) * | 2007-09-17 | 2010-05-19 | 潍坊恒联玻璃纸有限公司 | Method for manufacturing film special for rubber belt |
| CN104072810A (en) * | 2014-04-30 | 2014-10-01 | 新疆元泰新材料有限公司 | Production process of photoelectric biomass cellulose membrane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1021116C (en) | 1993-06-09 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |