CN104910431A - Anti-aging agricultural full-degradable plastic film and preparation method thereof - Google Patents
Anti-aging agricultural full-degradable plastic film and preparation method thereof Download PDFInfo
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- CN104910431A CN104910431A CN201510273939.XA CN201510273939A CN104910431A CN 104910431 A CN104910431 A CN 104910431A CN 201510273939 A CN201510273939 A CN 201510273939A CN 104910431 A CN104910431 A CN 104910431A
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Abstract
The invention discloses an anti-aging agricultural full-degradable plastic film. The anti-aging agricultural full-degradable plastic film is prepared from following raw materials, by weight, 60 to 65 parts of corn starch, 7 to 9 parts of nano montmorillonite, 0.6 to 0.7 part of peanut oil, 1.2 to 1.4 parts of tetrabutyl titanate, 12 to 14 parts of ramie straw, 30 to 35 parts of polyvinyl alcohol, 13 to 16 parts of epoxidized soybean oil, 1 to 1.2 parts of xylitol ester, 2 to 3 parts of polyvinyl acetate, 3 to 4 parts of urea, and 1 to 2 parts of triglycidyl isocyanurate. Mechanical properties and aging resistance of starch-based thin film are poor, so that thin film strength and aging resistance are improved by adjusting raw material ratio, adding starch-based reinforcing materials such as polyvinyl acetate, and triglycidyl isocyanurate, and via combination with polyvinyl alcohol; the obtained anti-aging agricultural full-degradable plastic film can be taken as agricultural thin film or made into fruit and vegetable bagging materials; easily caused aging of plastic film caused by expose to the sun and rain is avoided preferably; natural degradation can be realized; and no environmental burden is caused.
Description
Technical field
The present invention relates to plastics film technical field, particularly a kind of anti-aging fully degradable agricultural plastics film and preparation method thereof.
Background technology
In recent years, because waste plastic " white pollution " brought that be difficult to degrade is on the rise, cause global extensive concern, countries in the world have been put into effect restriction successively or have been prohibitted the use the relevant laws and regulations of non-degradable plastic packing article.On the other hand, be Nonrenewable resources owing to manufacturing the raw material oil of conventional plastic, along with a large amount of uses of the mankind will be exhausted, thus developing with renewable resources is that raw material, degradable environmental friendliness plastic are extremely urgent.Utilize biodegradable starch material to prepare the focus that degradable packaging film has become countries in the world research.But starch is while raising plastics degradability, the decline of its physical and mechanical properties can be caused on the one hand, make its processing difficulties, also there is wetting ability on the other hand too strong, and the consistency between most of resins for universal use is very poor, cause the thin film mechanical performance made to decline to a great extent, block-water performance is poor, ageing resistance is poor, thus hinders the widespread use of starch plastic in industrialization promotion process.
Polyvinyl alcohol is a kind of broad-spectrum high molecular polymer, performance is between plastics and rubber, containing a large amount of polar group hydroxyls, toxicity is very low, molecular chain structure symmetry is regular, there is unique strong adherence, epithelium snappiness, smoothness, oil-proofness, solvent resistance, protective colloid, gas barrier performance and the water tolerance had through special processing, also there is certain biological degradability simultaneously, have in wet environment under bacterium existent condition and can resolve into water and carbonic acid gas completely in 6 months, it is Biodegradable Materials, but it is higher to degraded environmental requirement in degradation process, degradation speed is made still to seem relatively slow.
Ramie is the traditional fibre crop having distinct Chinese characteristics, and the long-term ramie planting area of China reaches about 200,000 hectares, and except ramie phloem extracts as except textile product, ramie boon is seldom utilized.The problems such as ramie boon utilization ratio is low, and process is difficult are governments at all levels and relevant department's question of common concern always, are also the problems that peasant is extremely concerned about.The by product that ramie core is processed as the large-scale production of ramie industry; important Biological resources; wherein rich cellulose, hemicellulose; its content of cellulose and the similar deciduous species of fibre shape; be the raw materials of desirable plant fiber tableware in theory, and it is rationally developed for raising ramie comprehensive value efficiently, promotes that ramie industry development is all significant.
Summary of the invention
The object of this invention is to provide a kind of anti-aging fully degradable agricultural plastics film and preparation method thereof.The mechanical property that the present invention is directed to starch-based film is not enough, the shortcoming of resistance to deterioration difference, the proportioning of adjustment raw material, adds Vinyl Acetate Copolymer, isocyanuric acid three-glycidyl ester etc. and strengthens starch-based material, coordinate polyvinyl alcohol, thin film strength and resistance to deterioration can be increased.
In order to realize object of the present invention, the present invention is by following scheme implementation:
A kind of anti-aging fully degradable agricultural plastics film, is made up of the raw material of following weight part: W-Gum 60-65, nano imvite 7-9, peanut oil 0.6-0.7, tetrabutyl titanate 1.2-1.4, ramie boon 12-14, polyvinyl alcohol 30-35, epoxy soybean oil 13-16, xylitol ester 1-1.2, Vinyl Acetate Copolymer 2-3, urea 3-4, isocyanuric acid three-glycidyl ester 1-2;
The anti-aging fully degradable agricultural plastics film of one of the present invention, be made up of following concrete steps:
(1) baking oven is put into after being mixed with nano imvite by W-Gum, take out after dry 120 minutes under the condition of 130 DEG C, (controlling bath temperature is 30 DEG C after being cooled to room temperature, mixed powder to be utilized sonic oscillation 30-40 minute, ultrasonic power is 100W), then mixed powder is transferred in stirring tank, add tetrabutyl titanate, control temperature is 75 DEG C, after stirring 15 minutes with the speed of 1500 revs/min, continue to add peanut oil, stir 15 minutes, finally take out and put into baking oven, the dry mixed powder namely obtaining surface hydrophobicity process for 60 minutes under the condition of 120 DEG C,
(2) 80-100 object powder is made after the drying of ramie boon through corase grind, fine grinding, then put into nano grinder and be ground into nanoscale powder, mix with Vinyl Acetate Copolymer again, kneader is put into after mixing, temperature control 120 DEG C, mediate 10 minutes, release cooling, obtain ramie boon and strengthen material;
(3) mixed powder of surface hydrophobicity modification step (1) obtained mixes with isocyanuric acid three-glycidyl ester, by colloidal mill dispersion 60-90 minute, then the ramie boon enhancing material that step (2) obtains is added, by in dual-screw pelletizer, melt extrude granulation under the condition of control temperature 170-180 DEG C, obtain the starch masterbatch that diameter is 6mm;
(4) after starch masterbatch, polyvinyl alcohol, epoxy soybean oil, urea and all the other remaining components that step (3) obtains being mixed at normal temperatures, join in single screw extrusion machine, control temperature carries out hot-melt extruded Blown Film under the processing temperature of 170-180 DEG C, last qualitative rolling, packs and get final product.
The invention has the beneficial effects as follows: first the present invention carries out hydrophobizing surface process to starch, nano imvite, sonic oscillation makes the particle diameter of starch decline, specific surface area increases, and tetrabutyl titanate and hydrophobizing agent peanut oil effectively shield starch surface hydroxyl, form high hydrophobic layer; Simultaneously nano imvite has good gas barrier property and good far-infrared reflection, anti-aging, simultaneously heat-resisting, wear-resisting, intensity is high; Next utilizes Vinyl Acetate Copolymer to strengthen the strongthener of ramie boon as Based Full-degradable Plastics Film, and have good water-fast, oil resistant, ageing resistance, intensity is high, improve thin film strength, can be dissolved by environment after use, and cost is low, turn waste into wealth, can not pollution be produced.
The mechanical property that the present invention is directed to starch-based film is not enough, the shortcoming of resistance to deterioration difference, the proportioning of adjustment raw material, add Vinyl Acetate Copolymer, isocyanuric acid three-glycidyl ester etc. and strengthen starch-based material cooperation polyvinyl alcohol, can increase thin film strength and resistance to deterioration, product may be used for agricultural film or manufactures fruit-vegetable covering bag, solves plastics film well due to long-term outside by the problem of very easily aged deterioration of exposing to the sun and rain, can natural degradation after discarded, environment zero is born.
Specific embodiments
Below by specific examples, the present invention is described in detail.
A kind of anti-aging fully degradable agricultural plastics film, is made up of the raw material of following weight part (kilogram): W-Gum 60, nano imvite 7, peanut oil 0.6, tetrabutyl titanate 1.2, ramie boon 12, polyvinyl alcohol 30, epoxy soybean oil 13, xylitol ester 1, Vinyl Acetate Copolymer 2, urea 3, isocyanuric acid three-glycidyl ester 1;
The anti-aging fully degradable agricultural plastics film of one of the present invention, be made up of following concrete steps:
(1) baking oven is put into after being mixed with nano imvite by W-Gum, take out after dry 120 minutes under the condition of 130 DEG C, (controlling bath temperature is 30 DEG C after being cooled to room temperature, mixed powder to be utilized sonic oscillation 40 minutes, ultrasonic power is 100W), then mixed powder is transferred in stirring tank, add tetrabutyl titanate, control temperature is 75 DEG C, after stirring 15 minutes with the speed of 1500 revs/min, continue to add peanut oil, stir 15 minutes, finally take out and put into baking oven, the dry mixed powder namely obtaining surface hydrophobicity process for 60 minutes under the condition of 120 DEG C,
(2) make 80 object powder by after the drying of ramie boon through corase grind, fine grinding, then put into nano grinder and be ground into nanoscale powder, then mix with Vinyl Acetate Copolymer, put into kneader after mixing, temperature control 120 DEG C, mediate 10 minutes, release cooling, obtain ramie boon and strengthen material;
(3) mixed powder of surface hydrophobicity modification step (1) obtained mixes with isocyanuric acid three-glycidyl ester, 60 minutes are disperseed by colloidal mill, then the ramie boon enhancing material that step (2) obtains is added, by in dual-screw pelletizer, melt extrude granulation under the condition of control temperature 170-180 DEG C, obtain the starch masterbatch that diameter is 6mm;
(4) after starch masterbatch, polyvinyl alcohol, epoxy soybean oil, urea and all the other remaining components that step (3) obtains being mixed at normal temperatures, join in single screw extrusion machine, control temperature carries out hot-melt extruded Blown Film under the processing temperature of 170-180 DEG C, last qualitative rolling, packs and get final product.
Product of the present invention is carried out explanation test according to the standard of GB/T 20197-2006, and the soil through 4 months buries experiment, and biological degradation rate can reach 63.1%.Carry out Mechanics Performance Testing according to GB/T 1040.3-2006, transverse tensile strength is 25.9MPa, and elongation at break is 669.75%; Longitudinal tensile strength is 23.8MPa, and elongation at break is 449.35%, conformance with standard.
Claims (2)
1. an anti-aging fully degradable agricultural plastics film, it is characterized in that, be made up of the raw material of following weight part: W-Gum 60-65, nano imvite 7-9, peanut oil 0.6-0.7, tetrabutyl titanate 1.2-1.4, ramie boon 12-14, polyvinyl alcohol 30-35, epoxy soybean oil 13-16, xylitol ester 1-1.2, Vinyl Acetate Copolymer 2-3, urea 3-4, isocyanuric acid three-glycidyl ester 1-2.
2. a kind of anti-aging fully degradable agricultural plastics film according to claim 1, is characterized in that, be made up of following concrete steps:
(1) baking oven is put into after being mixed with nano imvite by W-Gum, take out after dry 120 minutes under the condition of 130 DEG C, (controlling bath temperature is 30 DEG C after being cooled to room temperature, mixed powder to be utilized sonic oscillation 30-40 minute, ultrasonic power is 100W), then mixed powder is transferred in stirring tank, add tetrabutyl titanate, control temperature is 75 DEG C, after stirring 15 minutes with the speed of 1500 revs/min, continue to add peanut oil, stir 15 minutes, finally take out and put into baking oven, the dry mixed powder namely obtaining surface hydrophobicity process for 60 minutes under the condition of 120 DEG C,
(2) 80-100 object powder is made after the drying of ramie boon through corase grind, fine grinding, then put into nano grinder and be ground into nanoscale powder, mix with Vinyl Acetate Copolymer again, kneader is put into after mixing, temperature control 120 DEG C, mediate 10 minutes, release cooling, obtain ramie boon and strengthen material;
(3) mixed powder of surface hydrophobicity modification step (1) obtained mixes with isocyanuric acid three-glycidyl ester, by colloidal mill dispersion 60-90 minute, then the ramie boon enhancing material that step (2) obtains is added, by in dual-screw pelletizer, melt extrude granulation under the condition of control temperature 170-180 DEG C, obtain the starch masterbatch that diameter is 6mm;
(4) after starch masterbatch, polyvinyl alcohol, epoxy soybean oil, urea and all the other remaining components that step (3) obtains being mixed at normal temperatures, join in single screw extrusion machine, control temperature carries out hot-melt extruded Blown Film under the processing temperature of 170-180 DEG C, last qualitative rolling, packs and get final product.
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Citations (6)
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| CN101914223A (en) * | 2010-08-06 | 2010-12-15 | 西北师范大学 | Preparation method of modified starch-polyvinyl alcohol-based composite plastic film |
| CN101993558A (en) * | 2009-08-09 | 2011-03-30 | 陈天云 | Thin film produced by using starch fiber waste plastic |
| CN102372858A (en) * | 2010-08-18 | 2012-03-14 | 陈天云 | Preparation method for starch-based biodegradable plastic |
| CN103435981A (en) * | 2013-08-06 | 2013-12-11 | 东莞市鑫海环保材料有限公司 | Preparation method of full biodegradation film |
| CN104098791A (en) * | 2014-06-30 | 2014-10-15 | 安徽巢湖南方膜业有限责任公司 | Biodegradable thermoplastic starch-polyethylene film |
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- 2015-05-27 CN CN201510273939.XA patent/CN104910431A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1640928A (en) * | 2004-01-02 | 2005-07-20 | 王光明 | full-degradable environment-friendly film material |
| CN101993558A (en) * | 2009-08-09 | 2011-03-30 | 陈天云 | Thin film produced by using starch fiber waste plastic |
| CN101914223A (en) * | 2010-08-06 | 2010-12-15 | 西北师范大学 | Preparation method of modified starch-polyvinyl alcohol-based composite plastic film |
| CN102372858A (en) * | 2010-08-18 | 2012-03-14 | 陈天云 | Preparation method for starch-based biodegradable plastic |
| CN103435981A (en) * | 2013-08-06 | 2013-12-11 | 东莞市鑫海环保材料有限公司 | Preparation method of full biodegradation film |
| CN104098791A (en) * | 2014-06-30 | 2014-10-15 | 安徽巢湖南方膜业有限责任公司 | Biodegradable thermoplastic starch-polyethylene film |
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