CN1095388A - Method of production of agriculture film with corn stalk - Google Patents
Method of production of agriculture film with corn stalk Download PDFInfo
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- CN1095388A CN1095388A CN 93105075 CN93105075A CN1095388A CN 1095388 A CN1095388 A CN 1095388A CN 93105075 CN93105075 CN 93105075 CN 93105075 A CN93105075 A CN 93105075A CN 1095388 A CN1095388 A CN 1095388A
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Abstract
The present invention relates to a kind ofly make raw material with cornstalk and make straw fiber mulch film and plastic sheeting for farm use, its technical process: cornstalk (go root, slightly and leaf), broken, whirlwind takes off marrow, hydrolysis (its waste liquid can extract Xylitol) is given in preheating, acid.Boiling, bleaching, concentrate, dissolving, gel, deaeration, membrane, desulfurization, bleaching, modification, oven dry, coiling.In order to cornstalk is on the basis of raw material production man-made fiber pulp, making it to reduce cost is fit to produce the raw material of mulch film, and does not reduce its quality, makes it to manufacture (is standard with the polyethylene ground film standard) agricultural mulching of satisfying the criteria, reach the comprehensive utilization cornstalk, improve the purpose of farmers' income.
Description
The present invention relates to a kind of is the technique manufacturing method that raw material is made agricultural mulching with corn stalk.
From sixties end, the agricultural polyethylene film soverlay technique makes the agriculture production of scientific and technological developed countries such as Japan, the U.S. obtain revolutionary development in the world.China promoted the use of the vinyl polymer agricultural mulching since 87 years.Area coverage had reached 40% in 89 years, and about 500,000 tons of year consumption agricultural mulching has played very big effect to increasing crop yield.But polyethylene ground film remains in the soil, is difficult for being destroyed Soil structure by microbiological degradation and absorption, and agriculture production is descended, and the soil is contaminated, makes originally to be referred to as " White Revolution ", has become " white disaster ".
Even so, because there is not substitute, still use.But because polyethylene raw material sources shortage and price rises significantly causes agricultural mulching to appreciate significantly.Country is for supporting agriculture production, stable prod price, and the protection peasant benefit is just had to employ state fund or with the way of reducing or remiting the taxes, given the factory that produces agricultural polyethylene film with subsidy, and this just causes country to fiscal huge burden.Therefore agricultural polyethylene film production is many more, and the fund of state revenue and expenditure subsidy is just many more; Bear also big more.The rising of agriculture production cost makes peasant's decline of making a profit, and it is unfavorable that developing agricultural is produced, and the rising of agricultural product price has great effect to entire society.
For this reason, develop a kind of novelly rapidly, it is abundant to have raw material resources, and cheap, the agricultural mulching that soil is damaged and pollutes will not have great economic implications and social effect.
It is that the raw material production agricultural mulching also has breakthrough development that Haidian, 92 years Beijing film institute releases with the wheat straw bar, but the straw on China's agricultural, straw and rice bar all are fabulous paper making raw materials, and corn stalk is not sent and gone up big purposes only.Most places all receiving corn later on for kind of a wheat, whole ground, have to be burnt on the spot, and are unfortunately tangible.For this reason, we make on the basis of regenerated fiber, glassine paper pulp, Xylitol at the research corn stalk, and researching and developing out corn stalk is the raw material production agricultural mulching.The acidproof rain of this novel plastic sheeting for farm use, corrosion, be difficult for being damaged by worms, sunlight penetrate by force with low-temperature condition under, performance does not change, without any toxic substance, tension intensity and transmittance are close with polyethylene ground film, can be decomposed into organic matter (after 6～8 months) in the soil, particularly have aboundresources, advantage such as cheap.
The key problem in technology of producd fibers mulch film is cellulosic dissolving, purification, the prescription that condenses and solidify and technology.In recent years, we have done the inferior test of hundreds of, made corn stalk make man-made fiber pulp, and spin the silk and glassine paper all succeed, quality product all reaches the short silk of viscose fiber promulgated by the ministries or commissions of the Central Government wood pulp (FJ518-82) standard, and prepared Xylitol is also more advanced than the crystalline xyhose alcohol index of corn cob system.
Corn stalk is the annual herb plant, cellulose about 40%, pentosan 25～26% lignins 18～19%, protein 3～4%, pectin 0.5%, ash 4～5%.The objective of the invention is to make the high molecular cellulose film with its Mierocrystalline cellulose, be exactly on the basis of mature technology that utilizes production regenerated fiber and glassine paper and technology, give necessary improvement and raising, to reduce cost is main purpose, and ensure the quality of products and do not reduce, content of cellulose is improved relatively, dissolve full and uniform, improve viscosity and extensibility and reduce shrinking percentage, improve other physicochemical characteristics, utilize present glassine paper standard equipment again, improved, the raising of extending gets final product film forming (standard is pressed the polyethylene ground film standard) with this improved novel appts processing.
Manufacture method of the present invention:
1, cellulosic extraction (and extracting Xylitol) is purified and is congealed into pulp.
2, make Mierocrystalline cellulose become cellulose xanthate, and become viscose glue.
3, Mierocrystalline cellulose solidifies, the denaturing treatment film forming.
Technical process:
Corn stalk (go root, slightly, leaf) fragmentation-cyclonic separation takes off marrow-give heat-acid and gives hydrolysis-boiling-bleaching-concentrate-dissolving-gel-deaeration-membrane-desulfurization-bleaching-modification-oven dry-coiling
1, slurrying part:
Hydrolysis is given in acid:
Hydrolytic reagent is a hydrochloric acid:
Acid is given hydrolyzed solution than 1: 4～6
Hydrolysis acid concentration 0.18～0.27%
60～68 minutes heating-up times
Soaking time 100～110 minutes
120～140 ℃ of holding temperatures
Little venting is three times in heating-up time, and its waste water was reusable in each 10 minutes ± 2 minutes.
Cooking process:
A: the hydrolysis sulphate process is given in acid:
With cash amount 16～20%
Sulfuration cash 10～18%
Liquor ratio 1: 4～6
90～110 minutes heating-up times
Soaking time 140～180 minutes
145～165 ℃ of holding temperatures
Auxiliary agent: tertiary sodium phosphate 1～2%
The medium and small venting twice of temperature-rise period, each 10 ± 2 minutes.
B: can adopt the organic solvent method boiling:
Liquor ratio 1: 4～6
NaOH consumption 14～20%
Ethanol consumption 10～18%
Sodium peroxoborate (or Sodium Nitrite) 1.4%～2%
90～110 minutes heating-up times
Soaking time 120～160 minutes
120～145 ℃ of holding temperatures.
The medium and small venting of temperature-rise period once.
C: also can adopt the ammonium salt process boiling:
Liquor ratio 1: 4～6
(NH
4)
2SO
3Concentration 5～10%
(NH
4)
HCO
3Concentration 2～4%
90～110 minutes heating-up times
Soaking time 120～160 minutes
160～180 ℃ of holding temperatures
Auxiliary agent: tripoly phosphate sodium STPP 1～2%
Little venting twice in the temperature-rise period, each 10 ± 2 minutes
Bleaching, chlorine dosage 1.4～2.5%
40～45 ℃ of temperature
The 120 minutes time (it is fixed to look DP)
PH value 9.5～10
Do not having to adopt the boiling of cash method under the cash recvery facility situation.
The boiling of organic solvent method is to add NaOH and alcoholic acid mixing solutions when boiling, and this method can effectively solve problem of environmental pollution, and the cost inferior quality is good, and ethanol is added by evaporation, collection, cold doubting.
The boiling of ammonium salt process can solve traditional cash and boil black liquor and be difficult to handle a difficult problem that causes environmental pollution, and have the certain significance to alleviating current cash liquid situation in short supply.Imonium wide material sources, price have only and burn 1/4 of cash, the rate of recovery height of slurry, and cost is low than the cash method, and its black digestion liquid can partly recycle, and its black digestion liquid do not need any processing directly be used as agriculture compound manure, turns harm into good, and reduces pollution.
In order to last method boiling, can go out the fiber separation in the corn stalk as the raw material of producing mulch film.Its marrow of removing can be made into feed or starch.Acid is given in the waste water in the hydrolyzing process and is contained a large amount of pentosan, wood sugar is made in its extraction and then made Xylitol (in the corn stalk be 6% content (to the over dry speech)), purifies moisture content with this, so both decontaminations, making the best use of everything simultaneously, really is that " that abandons causes harm, and what use is precious.”
The quality of its mulch film pulp:
The polymerization degree 800～900 alpha celluloses 88～89%
Ash 0.17% iron-holder 50P.P.M
Pentose 4% whiteness 75～80%
2, glue part:
Technical process: cashization-yellow-dissolving-Tuo light (maturation)
(1), cashization:
First fibre 24～26% contains cash 14～16%
40～50 ℃ of cash time 1:30～1:50 cash temperature
(2) yellow:
Dithiocarbonic anhydride consumption 10～20%
1: 40～2: 10 yellow time
23～29 ℃ of yellow temperature
(3), dissolving:
Viscose glue contains cash amount 6% viscose glue and contains first fibre 8%
Dissolution time 2: 30～3: 00
10 ℃ of solvent temperatures
(4), maturation (deaeration)
20 ℃ of deaeration temperature
2: 40～3: 00 deaeration time
3, system membrane portions:
(1), technical process:
System film groove-washing-desulfurization-washing-bleaching-washing-modification-plasticizing-oven dry-reel-one-tenth dress.
(2), processing condition:
1, system film:
H
2SO
4100～135g/l
Na
2SO
41SO～2SOg/l
40～46 ℃ of temperature
Drop＜13g/l
Spray lip thickness 0.12～0.16mm
6～10 in spray lip slit
Spray chamber pressure 0.12～0.16mPA
2, desulfurization:
NaOH 1.5～2.5g/l
90 ℃ of temperature
3, bleaching:
Naclo 1.0～1.7g/l
Temperature normal temperature
4, modification:
Formaldehyde 2～3%
5, plasticizing:
Glycerine 30g/l
Silicon sol 0.1%
Corn stalk mulch film quality standard:
1, longitudinal tensile strength 17.5 megabars
2, transverse tensile strength 12 megabars
3, transmittance 84～86%
4, infrared ray absorption is greater than polyethylene
5, degraded situation is placed into the soil in 15 centimeters wet soils and to be begun degraded in about 30 days, transfers organic fertilizer to about 90 days.
6, film weighs 19～23g/m
2
7, breathe freely, preserve soil moisture, protect fertile
8, temperature-30-+50 ℃
Claims (7)
1, with the plain agricultural mulching of making of straw fiber, be to be the mulch film that raw material is made with the polyethylene at present, the present invention is characterised in that: make mulching film raw material with cornstalk fiber.
2, make mulching film raw material according to claim 1 is described with corn stalk, it is characterized in that: technical process in the mill is:
Corn stalk (go root, slightly, leaf) fragmentation-cyclonic separation takes off marrow-give heat-acid and gives hydrolysis-boiling-bleaching-concentrate-dissolving-gel-deaeration-membrane-desulfurization-bleaching-modification-oven dry-coiling-packing.
3, according to claim 1,2 described cornstalk fibers, it is characterized in that: with corn stalk go root, slightly, leaf, cut off, make the corn stalk fragmentation, and leaf part and marrow branch removed with cyclonic separator.
4, according to the described cornstalk fiber of claim 1, it is characterized in that: it is hydrochloric acid that hydrolytic reagent is given in said acid.
Acid is given hydrolyzed solution than 1: 4～6
Hydrolysis acid concentration 0.18～0.27%
60～68 minutes heating-up times
Soaking time 100～110 minutes
120～140 ℃ of holding temperatures
Little venting is three times in heating-up time, and each 10 minutes ± 2 minutes, its waste water reusable (extraction Xylitol).
5, described according to claim 1, it is characterized in that: said cooking process has following method respectively:
The hydrolysis sulphate process is given in A, acid:
With cash amount 16～20%
Sulfuration cash 10～18%
Liquor ratio 1: 4～6
90～110 minutes heating-up times
Soaking time 142～180 minutes
143～165 ℃ of holding temperatures
Auxiliary agent: tertiary sodium phosphate 1～2%
The medium and small venting twice of temperature-rise period, each 10 minutes ± 2 minutes.
B, also can adopt the organic solvent method boiling:
Liquor ratio 1: 4～6
NaOH consumption 14～20%
Ethanol consumption 10～18%
Sodium peroxoborate (or Sodium Nitrite) 1.4～2%
90～110 minutes heating-up times
Soaking time 120～160 minutes
120～145 ℃ of holding temperatures
The medium and small venting of temperature-rise period once.
C, also can adopt the ammonium salt process boiling:
Liquor ratio 1: 4～6
(NH
4) HCO
3Concentration 2～4%
(NH
4)
2SO
3Concentration 5～10%
Auxiliary agent: tripoly phosphate sodium STPP 1～2%
The medium and small venting twice of temperature-rise period, each 10 ± 2 minutes.
Bleaching work:
Chlorine dosage 1.4～2.5%
40～45 ℃ of temperature
The 120 minutes time (it is fixed to look DP)
PH value 9.5～10
6, according to claim 1,2 described cornstalk fibers, it is characterized in that said: the technical process of glue part is:
Cashization-yellow-dissolving-deaeration (maturation)
Its all operation is:
A, cashization: first fibre 24～26% contains cash 14～16%(NaOH)
The cash time: 1: 30～1: 50
Cash temperature: 40～50 ℃
B, yellow:
Dithiocarbonic anhydride consumption: 10～20%
1: 40～2: 10 yellow time
23～29 ℃ of yellow temperature
C, dissolving:
Viscose glue contains cash amount 6%
Viscose glue contains first fibre 8%
Dissolution time 2: 50～3: 00
10 ℃ of solvent temperatures
D, deaeration (maturation)
20 ℃ of deaeration temperature
2: 40～3: 00 deaeration time
7, according to claim 1,2 described cornstalk fibers, it is characterized in that said:
The system membrane portions: its technical process is:
System film-washing-desulfurization-washing-bleaching-washing-modification-plasticizing-oven dry-reel-one-tenth dress
Its all procedure technology condition is:
The system film:
H
2SO
4100～135g/l
Na
2SO
4150～250g/l
40～46 ℃ of temperature
Drop＜13g/l
Spray lip thickness 0.12～0.16mm
6～10 in spray lip slit
Spray chamber pressure 0.12～0.16mPA
Desulfurization:
NaOH 1.5～2.5g/l
90 ℃ of temperature
Bleaching:
NaCLO 1.0～1.7g/l
Temperature normal temperature
Modification:
Formaldehyde 2～3%
Plasticizing:
Glycerine 30g/l
Silicon sol 0.1%
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93105075 CN1095388A (en) | 1993-05-20 | 1993-05-20 | Method of production of agriculture film with corn stalk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93105075 CN1095388A (en) | 1993-05-20 | 1993-05-20 | Method of production of agriculture film with corn stalk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1095388A true CN1095388A (en) | 1994-11-23 |
Family
ID=4985530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93105075 Pending CN1095388A (en) | 1993-05-20 | 1993-05-20 | Method of production of agriculture film with corn stalk |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1095388A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1092219C (en) * | 1998-01-16 | 2002-10-09 | 田应官 | Farm land mulch filma nd preparation process thereof |
| CN101333774B (en) * | 2007-06-29 | 2011-02-09 | 褚全慧 | Process for making full-degradable paper mulching film for agricultural use from agronomic crop stalks |
| CN101245565B (en) * | 2006-11-16 | 2011-10-26 | 褚全慧 | Zero discharge clean method for producing corn cane man-made fiber pulp, xylitol |
-
1993
- 1993-05-20 CN CN 93105075 patent/CN1095388A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1092219C (en) * | 1998-01-16 | 2002-10-09 | 田应官 | Farm land mulch filma nd preparation process thereof |
| CN101245565B (en) * | 2006-11-16 | 2011-10-26 | 褚全慧 | Zero discharge clean method for producing corn cane man-made fiber pulp, xylitol |
| CN101333774B (en) * | 2007-06-29 | 2011-02-09 | 褚全慧 | Process for making full-degradable paper mulching film for agricultural use from agronomic crop stalks |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |