CN101898399B - Technology for preparing composite package cushioning material from rice straw fibers - Google Patents
Technology for preparing composite package cushioning material from rice straw fibers Download PDFInfo
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- CN101898399B CN101898399B CN 201010235939 CN201010235939A CN101898399B CN 101898399 B CN101898399 B CN 101898399B CN 201010235939 CN201010235939 CN 201010235939 CN 201010235939 A CN201010235939 A CN 201010235939A CN 101898399 B CN101898399 B CN 101898399B
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Abstract
The invention discloses technology for preparing a composite package cushioning material from rice straw fibers. The technology comprises the following technological steps of: (1) pretreating, namely drying and removing impurities; (2) cutting up, namely cutting the rice straw obtained in the step (1) into straw particles with the diameter of 5 to 8mm, and mixing with partial fine rice straw fibers which are cut into the diameter of around 0.1mm and the length of 5mm; (3) performing surface pretreatment, namely soaking for 10 minutes by using aqueous solution of NaOH, filtering and drying for later use; (4) mixing, namely adding polymer into the mixed fibers subjected to surface treatment according to a mass ratio of 2-5:6-9, and adding a proper amount of mildew preventive and foaming agent for uniformly mixing; (5) molding, namely adding the uniformly mixed mixture into a mold, molding and demolding; and (6) drying. The invention also discloses a formula and technology for preparing 35 percent urea resin. The urea resin is a raw material for preparing the polymer in the composite package cushioning material prepared from the rice straw fibers. The technology for preparing the composite package cushioning material has the advantages of simple process flow and no side products. The produced finished product has the advantages of good degradation performance, good elastic resilience, high unit density and compression strength, and low density.
Description
Technical field
The present invention relates to the preparation technology of blister pack padded coaming, especially relate to a kind of technique of utilizing preparing composite package cushioning material from rice straw fibers.
Background technology
The characteristics such as matter is hard, transparent because having for polystyrene (PS), rigidity, electrical insulating property, agent of low hygroscopicity, cheap, easy dyeing, one of current four large general-purpose plastics have been become, be mainly used in the industries such as packing, building, medicine, electronics, automobile, household electrical appliances, instrument, footwear, commodity, furniture, toy, output and consumption figure are year by year ascendant trend.At present, raising along with people's living standard, the waste old polystyrene foamed plastic that produces is increasing, so that " white pollution " is more and more serious, these class plastic products with after namely abandon and become rubbish, this garbage weight is light, volume is large, ageing-resistant, anticorrosive, stable chemical nature is difficult for being degraded by microorganisms, enter soil after, soil property is degenerated, method with burning is processed, and burning can produce carbon dioxide and other pernicious gas, also can cause disadvantageous room temperature effect, also contaminated air has caused very large pollution to environment.
Summary of the invention
Problem for above-mentioned proposition, the objective of the invention is the package buffer material that rice-straw fibre is lightweight as main raw material(s) prepares, resilience is good take easy degraded, the day by day serious foamed plastics of alternative pollution is as the shockproof cushioning packaging material of the products such as household electrical appliances, not only eliminate the waste plastic foam pollution on the environment, can take full advantage of simultaneously the discarded resource of agricultural, reach the purpose of " making a silk purse out of a sow's ear ", improve the utilization rate of agricultural and sideline product, promoted the development of rural economy.
The present invention is achieved in that a kind of technique with preparing composite package cushioning material from rice straw fibers, and its processing step is:
(1), pre-treatment: at first with straw drying under the condition of nature or heating, the impurity in the dried straw is removed clean;
(2), chopping: previous step gained straw 5/8 stalk particle that is cut into 5～8mm by weight, 3/8 part by weight is ground into about diameter 0.1mm, the thin rice-straw fibre of length 5mm, and the gained stalk particle evenly is mixed to get composite fibre with thin rice-straw fibre again;
(3), surface preparation: filtering drying was for subsequent use after previous step gained composite fibre at room temperature used NaOH aqueous solution soaking 10min;
(4), mix: add polymer by weight 2～5: 6～9 in the composite fibre after surface treatment, and add an amount of mould inhibitor, blowing agent mixing;
(5), moulding: join mould, shaping and demoulding after the previous step gained mixed;
(6), drying: dry 60min under 110 ℃ of conditions, or 48h under the natural conditions;
(7), finished product: the dry product of previous step gained moulding is detected and be packaged into finished product.
The preferred 3%NaOH aqueous solution of the NaOH aqueous solution in the above-mentioned steps (3).
Preferred 4: 7 of composite fibre in the above-mentioned steps (4) and the weight ratio of polymer.
Above-mentioned steps can also add an amount of plasticizer in (4).
The polyvinyl alcohol water solution of the polymer preferred 12% in the above-mentioned steps (4) mixes with solid content 35% Lauxite, and weight proportion is 3: 1.
Wherein the weight ratio of each formula constituent of 35% Lauxite is, urea: 37% formalin: hexamethylenetetramine: ethylene glycol: cornstarch=50～180: 150～280: 1～8: 10～30: 10～30.
The weight ratio of each formula constituent of above-mentioned 35% Lauxite is preferred, urea: 37% formalin: hexamethylenetetramine: ethylene glycol: cornstarch=100: 217: 4: 20: 20.
The invention also discloses a kind of technique for preparing 35% Lauxite:
(a), mix: 65% and six methines, four ammoniums of formalin, urea gross weight are added in the there-necked flask stir, transfer pH to 7.8 with 30%NaOH, in 40min, be warming up to 90 ℃, and isothermal reaction 20min;
(b), addition reaction: it is constant to keep 90 ℃ of temperature of reaction system, add urea gross weight for the second time 35% after, continue isothermal reaction 20min;
(c), polycondensation reaction: keep 90 ℃ of reaction temperatures constant, transfer pH to 5.0 with 20% formic acid, behind the isothermal reaction 10min, add ethylene glycol, continue isothermal reaction 10min;
(d), transfer pH value: transfer about pH to 8.5 with 30%NaOH solution again, add cornstarch when being cooled to 70 ℃, be cooled to the normal temperature discharging behind the insulation 20min.
The technological process that the present invention adopts is simple, does not produce accessory substance, and finished product has the environmental-protecting performance of good easy degraded.Utilize simultaneously straw particle and long fine fibre well to arrange in pairs or groups, not only fully kept the advantage that straw hollow structure resilience is good, density is little, utilize simultaneously the collocation of fine fibre, further improve the intensity of rice-straw fibre material, make the density for preparing the fibrous material of producing low, intensity is large, and the compression strength of the unit intensity when adopting fibrous material 10% deformation of this technical recipe production can reach 1526KPacm
3/ g.By process of surface treatment of the present invention, can improve the compatibility of fiber and polymer and polymer to intrastitial infiltration, thereby can improve compression strength and the bonding strength of composite;
The invention discloses a kind of technical recipe and synthesis technique of Lauxite, synthetic Lauxite molecular weight is moderate, simultaneously has good intermiscibility with polyvinyl alcohol and auxiliary agent, fiber surface had good permeability, and the polyvinyl alcohol compound use can increase substantially the bonding strength between rice-straw fibre, fibrous material kept under the less density conditions, have larger compression strength, namely the compression strength of unit intensity be maximum; The proportioning of polymer disclosed by the invention and fiber is the best proportioning of the polymer of fibrous composite, and polymerization amount is crossed conference and caused density to increase, and too small meeting causes compression strength to descend, and adopts this proportioning, and the compression strength of its unit intensity is maximum.
Description of drawings
Fig. 1 is process chart of the present invention;
Fig. 2 is the process chart of Lauxite of the present invention.
The specific embodiment
Below in conjunction with embodiment and contrast accompanying drawing the present invention is described in further detail.
A kind of technique with preparing composite package cushioning material from rice straw fibers,
One, at first prepare a kind of 35% special Lauxite:
(a), mix: with stirring in 217g formalin (37%) and 65g urea and the 4g six methines four ammoniums adding there-necked flask, transfer pH7.8 with 30%NaOH, in 40min, be warming up to 90 ℃, and isothermal reaction 20min;
(b), addition reaction: it is constant to keep 90 ℃ of temperature of reaction system, behind the adding urea 35g second time, continues isothermal reaction 20min;
(c), polycondensation reaction: keep 90 ℃ of reaction temperatures constant, transferring pH with 20% formic acid is 5.0, behind the isothermal reaction 10min, adds ethylene glycol 20g, continues isothermal reaction 10min;
(d), transfer pH value: transfer about pH=8.5 with 30%NaOH solution, add cornstarch 20g when being cooled to 70 ℃, it is stand-by to be cooled to the normal temperature discharging behind the insulation 20min.
Two, be to be mixed into polymer at 3: 1 more by weight ratio with 35% Lauxite of 12% polyvinyl alcohol water solution and above-mentioned preparation.
Three, with the technique of preparing composite package cushioning material from rice straw fibers, its processing step is:
(1), pre-treatment: at first straw is dried under field conditions (factors), the impurity in the dried straw is removed clean;
(2), chopping: the stalk particle that previous step gained straw is cut into 5～8mm by 5/8 of gross weight, 3/8 part by gross weight is ground into about diameter 0.1mm, the thin rice-straw fibre of length 5mm, again gained stalk particle and thin rice-straw fibre evenly is mixed to get composite fibre;
(3), surface preparation: filtering drying was for subsequent use after previous step gained composite fibre at room temperature used 3%NaOH aqueous solution soaking 10min;
(4), mix: in the composite fibre after surface treatment, added polymer by weight 4: 7, and add an amount of mould inhibitor, blowing agent, plasticizer mixing;
(5), moulding: join mould after the previous step gained mixed, the 10min aftershaping demoulding under 0.2MPa and 120 ℃ of conditions;
(6), drying: or dry 48h under the natural conditions;
(7), finished product: the dry product of previous step gained moulding is detected and be packaged into finished product.
The rice straw fibreboard density 190Kg/m of preparation
3, compression strength (during 10% deformation) is 290KPa, the compression strength 1526KPacm of unit intensity
3/ g.
More than be to the present invention a kind of with preparing composite package cushioning material from rice straw fibers technique and the composition and engineering for preparing a kind of 35% Lauxite set forth; be used for helping to understand the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under the principle of the invention, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (7)
1. technique with preparing composite package cushioning material from rice straw fibers is characterized in that processing step is:
(1), pre-treatment: at first with straw drying under the condition of nature or heating, the impurity in the dried straw is removed clean;
(2), chopping: previous step gained straw 5/8 stalk particle that is cut into 5～8mm by weight, 3/8 part by weight is ground into about diameter 0.1mm, the thin rice-straw fibre of length 5mm, again gained stalk particle and thin rice-straw fibre evenly is mixed to get composite fibre;
(3), surface preparation: filtering drying was for subsequent use after previous step gained composite fibre at room temperature used NaOH aqueous solution soaking 10min;
(4), mix: in the composite fibre after surface preparation, add polymer by weight 2～5: 6～9, and add an amount of mould inhibitor, blowing agent mixing, described polymer is that 12% polyvinyl alcohol water solution mixes with solid content 35% Lauxite, and weight proportion is 3: 1;
(5), moulding: join mould, shaping and demoulding after the previous step gained mixed;
(6), drying: dry 60min under 110 ℃ of conditions, or dry 48h under the natural conditions;
(7), finished product: the dry product of previous step gained moulding is detected and be packaged into finished product.
2. a kind of technique with preparing composite package cushioning material from rice straw fibers according to claim 1, it is characterized in that: the NaOH aqueous solution in the described step (3) is the 3%NaOH aqueous solution.
3. a kind of technique with preparing composite package cushioning material from rice straw fibers according to claim 1, it is characterized in that: the composite fibre in the described step (4) and the weight ratio of polymer are 4: 7.
4. a kind of technique with preparing composite package cushioning material from rice straw fibers according to claim 1, it is characterized in that: also adding in the described step (4) has an amount of plasticizer.
5. a kind of technique with preparing composite package cushioning material from rice straw fibers according to claim 1, it is characterized in that: the weight ratio of each formula constituent of described 35% Lauxite is urea: 37% formalin: hexamethylenetetramine: ethylene glycol: cornstarch=50～180: 150～280: 1～8: 10～30: 10～30.
6. a kind of technique with preparing composite package cushioning material from rice straw fibers according to claim 1, it is characterized in that: the weight ratio of each formula constituent of described 35% Lauxite is urea: 37% formalin: hexamethylenetetramine: ethylene glycol: cornstarch=100: 217: 4: 20: 20.
7. according to claim 1 or 5 or 6 described a kind of techniques with preparing composite package cushioning material from rice straw fibers, it is characterized in that the technique for preparing 35% Lauxite is:
(a), mix: 65% and hexamethylenetetramine of formalin, urea gross weight added in the there-necked flask stir, transfer pH to 7.8 with 30%NaOH, in 40min, be warming up to 90 ℃, and isothermal reaction 20min;
(b), addition reaction: it is constant to keep 90 ℃ of temperature of reaction system, add urea gross weight for the second time 35% after, continue isothermal reaction 20min;
(c), polycondensation reaction: keep 90 ℃ of reaction temperatures constant, transfer pH to 5.0 with 20% formic acid, behind the isothermal reaction 10min, add ethylene glycol, continue isothermal reaction 10min;
(d), transfer pH value: transfer about pH to 8.5 with 30%NaOH solution again, add cornstarch when being cooled to 70 ℃, be cooled to the normal temperature discharging behind the insulation 20min.
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| CN 201010235939 CN101898399B (en) | 2010-07-23 | 2010-07-23 | Technology for preparing composite package cushioning material from rice straw fibers |
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| CN 201010235939 CN101898399B (en) | 2010-07-23 | 2010-07-23 | Technology for preparing composite package cushioning material from rice straw fibers |
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| CN101898399A CN101898399A (en) | 2010-12-01 |
| CN101898399B true CN101898399B (en) | 2013-10-23 |
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| CN103865282A (en) * | 2014-01-20 | 2014-06-18 | 南通天合包装有限公司 | Preparation method of degradable foamed plastic |
| CN104369250B (en) * | 2014-11-06 | 2018-05-11 | 安徽鸿路钢结构(集团)股份有限公司 | Double veneer composite boards of a kind of degumming preventing and preparation method thereof |
| CN105564821A (en) * | 2015-12-29 | 2016-05-11 | 吴任平 | Packaging pad grass sphere and making method thereof |
| CN110183201A (en) * | 2019-05-06 | 2019-08-30 | 浙江大东吴集团建设有限公司 | A kind of green cement composite material |
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| US5656129A (en) * | 1995-05-31 | 1997-08-12 | Masonite Corporation | Method of producing fibers from a straw and board products made therefrom |
| CN1200750A (en) * | 1995-09-12 | 1998-12-02 | Fvp股份有限公司 | Process for producing mouldings with a barrier layer made of biodegradable material, and mouldings produced according to this process |
| CN1111568C (en) * | 1999-10-08 | 2003-06-18 | 西安建筑科技大学 | Foamed damping, buffering and packing straw fiber material and production method thereof |
| CN1389517A (en) * | 2001-06-05 | 2003-01-08 | 段若新 | Plant fiber material product capable of being biodegraded completely and its making process |
| CN1366005A (en) * | 2001-12-10 | 2002-08-28 | 仪征市地板厂 | Technology for making composite board with rice straw and wheat stalk |
| EP1561733A1 (en) * | 2004-02-06 | 2005-08-10 | Stichting Geodelft | Construction material based upon a sludge or sludged waste material |
| CN101037522A (en) * | 2006-03-16 | 2007-09-19 | 上海奔奔门业有限公司 | Plant fibre/PVC composite material and manufacturing technique thereof |
| CN101250329A (en) * | 2008-04-14 | 2008-08-27 | 东北林业大学 | Crop straw-polyurethane foam composite material and method for preparing same |
| CN101654890A (en) * | 2008-08-19 | 2010-02-24 | 李小龙 | Environmentally-friendly plant fiber packing material |
| CN101747638A (en) * | 2008-12-02 | 2010-06-23 | 王志军 | Light vegetable fiber foaming and buffering package material and preparation method thereof |
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Address after: 518000 Guangdong city of Shenzhen province Baoan District Guangming New the village beauty forebest factory building A Patentee after: MYS GROUP CO., LTD. Address before: 518000 Guangdong City, Baoan District Province, the new Green Po Po village, the United States and the United States A plant Patentee before: Shenzhen MYS Environmental Protection & Technology Co., Ltd. |
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Granted publication date: 20131023 Termination date: 20190723 |
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