CN101691044A - Method for preparing maize straw board - Google Patents
Method for preparing maize straw board Download PDFInfo
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- CN101691044A CN101691044A CN200910308325A CN200910308325A CN101691044A CN 101691044 A CN101691044 A CN 101691044A CN 200910308325 A CN200910308325 A CN 200910308325A CN 200910308325 A CN200910308325 A CN 200910308325A CN 101691044 A CN101691044 A CN 101691044A
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Abstract
The invention discloses a method for preparing a maize straw board, which comprises the steps of dehydrating maize straws, cutting off the maize straws, compressing the maize straws into an isopycnic straw board-preparation raw material, drying the raw material, sieving the raw material into a coarse material and a fine material, spraying an adhesive, and performing hot press molding, wherein the weight percentage of the straws and the adhesive is 85-90: 10-15. The adhesive for preparing the board consists of 75 to 90 percent of urea-formaldehyde resin, 5 to 8 percent of ammonia water, 0.5 to 1 percent of polyvinyl alcohol, 6 to 12 percent of melamine, and 0.5 to 1 percent of ammonium chloride (weight proportion). The method is characterized by utilizing all components (peels, pulp and leaves) of the maize straws, adopting special equipment to directly compress the cut straws into the board-preparation raw material with the equidensity of between 0.8 and 1.0g/cm3, ensuring the same density of the raw material in sizing and pressing links of the board, improving the internal bonding strength of products, and also improving the utilization rate of the raw material and simplifying production technology so as to reduce production cost at the same time. The maize straw board has the advantages of adequate raw materials, low cost, high board quality, good biological degradability, and no pollution to the environment.
Description
Technical field
The present invention relates to a kind of preparation method who utilizes agricultural crop straw to prepare maize straw board.
Background technology
The early existing product of artificial board of straw comes out, for example compressed straw slab, wheat straw board etc., and maize straw board has product to release too.Chinese patent, the patent No.: 87103594, notification number: CN87103594, a kind of method with producing corn-stalk plate, the present invention relates to the production technology and the technology of maize straw board, be characterized in maize straw carry out broken and selection by winnowing, select fibre length 25mm with interior material drying, send in the glue mixer with binding agent stirring, paving prefabricating, to advance hot press then hot-forming.This invention directly bonds after with the maize straw fragmentation, hot pressing, because maize straw is made up of skin, flesh and leaf, the density of the cellulose that wherein contains, hemicellulose and lignin is different, so because density unevenness is even, make the internal bond strength of sheet material not enough after this sheet material hot pressing, the compressive resistance of sheet material is low, nail-holding ability is relatively poor, intensity is lower, and board quality is relatively poor, is difficult to form suitability for industrialized production.
In order to improve the quality of maize straw sheet material, the Britain Kang Bai company of international market, only utilize the skin of cornstalk to produce the homogeneous straw board, other parts can be used anything but, its material treatment process is after at first whole maize straw being removed leaf, use again machinery " strip off the skin ", remove the flesh of the inside after, pulverize oven dry making sheet again.The utilization rate of stalk is lower than 60%, has wasted a large amount of stalk resources.Present stage, the domestic market also had the maize straw panel products to come out, the material treatment process of these products is at first whole hand hay cutter of maize straw to be cut or pulverized, after the oven dry, the method of utilizing selection by winnowing to separate, remove the part of all leaves and earth then, the remaining skin that just utilizes maize straw too that can be used for making sheet, i.e. lignocellulosic.As the patent No.: 200710056086.X, the present invention relates to a kind of method of utilizing maize straw fiber and crosslinked starch adhesive to prepare sheet material.Be characterized in: with the stalk crust of maize straw after the skin stalks of rice, wheat, etc. is handled, being cut into length is 3～8cm segment, through the pulverizer pulverization process, the preparation stalk fibre, the stalk fibre and the agent of homemade crosslinked cornstarch gluing of preparation are stirred by a certain percentage, utilize the hot-press method preparation to have the biological degradation corn stalk sheet material of certain biomimetic features.
The maize straw board production technology that the comprehensive world at present, domestic market are released; in the utilization to the maize straw raw material, it is too high all to exist cost, complex manufacturing; the drawback that raw material availability is lower makes maize straw board be difficult to form industrialization, large-scale production.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of maize straw board, improve the maize straw utilization rate, reduce production costs, guarantee product quality.
Maize straw is by cellulose (skin); hemicellulose (flesh) and leaf (lignin) are formed; its density each other differs greatly, and the present invention is pressed into the isodensity raw material for standby with the integral body of its maize straw in the raw material processing links, can realize the maize straw board large-scale production.
Concrete preparation method of the present invention is: maize straw is dewatered, cuts off, is compressed into isopycnic stalk making sheet raw material, oven dry, sub-sieve become coarse fodder and fines, spray binding agent, hot-forming, the percentage by weight of described stalk and adhesive is: 85-90: 10-15.
Described maize straw is cut to 10-15mm, and being compressed into density is 0.8-1.0g/cm
3Stalk making sheet raw material.
Described sub-sieve is to be panel fines and central layer coarse fodder with the making sheet material screening, and coarse fodder length is 6-10mm, and fines length is 0.5-1mm.
The weight proportion of described adhesive is made up of Lauxite 75-90%, ammoniacal liquor 5-8%, polyvinyl alcohol 0.5-1%, melamine 6-12% and ammonium chloride 0.5-1%.
Described hot-forming temperature is 140-180 ℃, and hot pressing time is 15-35s/mm, and hot pressing pressure is 2.0-38mpa.
Maize straw board preparation method's of the present invention characteristics are to utilize whole composition Zhao skins, flesh and the leaf of maize straw, utilize that special equipment is disposable to cut off stalk, be compressed into isopycnic making sheet raw material synchronously, guarantee that sheet material spray glue is identical with material density in the compacting link, improve the internal bond strength of product, every index is equal to or is better than the timber wood-based plate, simultaneously also improve utilization ratio of raw materials, simplified production technology, thereby reduced production cost.Raw material of the present invention is sufficient and cheap, the board quality height, and have favorable biological degradability, environmentally safe.
The specific embodiment
The applicant again the utility model patent of first to file (patent No. is: 200620020997.8); this novel ring mould granulator cuts off whole maize straw by the cut-off blade on the cutterhead; when the diameter in the hole on the particle mould was 6-7mm, the maize straw of cut-out pushed granulating under squeezing roll and the effect of particle mould.
Among the preparation method of corn stalk of the present invention, cut off and be compressed into isopycnic stalk making sheet material process and adopt this novel ring mould granulator once to finish.Getting percentage by weight is: 90: 10 stalk and adhesive.Maize straw is dewatered naturally; to water content 15-30%; ring mould granulator at first is cut to 10-15mm by the cut-off blade on the cutterhead with whole maize straw; enter extrusion system synchronously; when the diameter in the hole on the particle mould is adjusted to 8-10mm; the raw material of extruding is loose shape, and promptly being compressed into density is 0.8-1.0g/cm
3Isodensity making sheet raw material; With isopycnic stalk making sheet raw material stoving, to water content be 4-6%; Remove the impurity of carrying secretly in the production process, as iron filings or foreign matter; With the raw material sub-sieve is the coarse fodder of making the fines of panel and making central layer, and coarse fodder length is 6-10mm, and fines length is 0.5-1mm; The spray adhesive, adhesive is pressed column weight amount proportioning: Lauxite 83%, ammoniacal liquor 7.2%, polyvinyl alcohol 0.6%, melamine 8.6%, ammonium chloride 0.6% are sprayed on the straw raw material after mixing.Mat formation, adopt the stagewise spreading machine to mat formation, pavement thickness is 8-35mm, spray remover when mating formation; Hot pressing: but individual layer machine direct heat is molded, multidaylight press needs precompressed, temperature 140-180 ℃ of adopting of hot pressing, and hot pressing time is 15-35s/mm, hot pressing pressure is 2.0-38mpa.Sawing and sanding: sawing is according to book size 1220 * 2440mm saw limit scale with the iron saw.Use abrasive finishing machine abrasive finishing at last, remove surperficial unconsolidated formation, finish the whole production link.
Claims (5)
1. the preparation method of a maize straw board, it is characterized in that: maize straw is dewatered, cuts off, is compressed into isopycnic stalk making sheet raw material, oven dry, sub-sieve, spray adhesive, hot-forming, and the percentage by weight of described stalk and adhesive is: 85-90: 10-15.
2. the preparation method of maize straw board according to claim 1, it is characterized in that: described maize straw is cut to 10-15mm, and being compressed into density is the stalk making sheet raw material of 0.8-1.0g/cm3.
3. the preparation method of maize straw board according to claim 1 is characterized in that: described sub-sieve is to be panel fines and central layer coarse fodder with the making sheet material screening, and coarse fodder length is 6-10mm, and fines length is 0.5-1mm.
4. the preparation method of maize straw board according to claim 1, it is characterized in that: the weight proportion of the adhesive of described manufacturing sheet material is made up of Lauxite 75-90%, ammoniacal liquor 5-8%, polyvinyl alcohol 0.5-1%, melamine 6-12% and ammonium chloride 0.5-1%.
5. the preparation method of maize straw board according to claim 1, it is characterized in that: described hot-forming temperature is 140-180 ℃, and hot pressing time is 15-35s/mm, and hot pressing pressure is 2.0-38mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910308325A CN101691044A (en) | 2009-10-16 | 2009-10-16 | Method for preparing maize straw board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910308325A CN101691044A (en) | 2009-10-16 | 2009-10-16 | Method for preparing maize straw board |
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| CN101691044A true CN101691044A (en) | 2010-04-07 |
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| CN200910308325A Pending CN101691044A (en) | 2009-10-16 | 2009-10-16 | Method for preparing maize straw board |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101898382A (en) * | 2010-05-07 | 2010-12-01 | 宋庆华 | Production method and manufacturing technology for corn stalk moulded board |
| CN102704590A (en) * | 2012-06-01 | 2012-10-03 | 秦皇岛裕源木业有限公司 | Wall board and processing technology thereof |
| CN103978537A (en) * | 2013-02-07 | 2014-08-13 | 富朗投资管理集团(香港)有限公司 | One-time formed methanal-free compound panel and processing technique |
| CN104070591A (en) * | 2014-07-09 | 2014-10-01 | 万华生态板业研究设计（烟台）有限公司 | Artificial board made of crop straw and method for manufacturing artificial board made of crop straw |
| CN105363762A (en) * | 2015-11-28 | 2016-03-02 | 武汉精英聚园科技有限公司 | Method for making plates by using waste corn stalks |
| CN106508486A (en) * | 2016-12-30 | 2017-03-22 | 黑龙江彤洲生物肥制造有限公司 | Pressing system and technique for pressing stalk powder into plate culture media |
| CN107415021A (en) * | 2017-06-28 | 2017-12-01 | 北京林业大学 | One kind sound absorption, insulation wood-based plate and preparation method thereof |
| CN112659304A (en) * | 2021-01-29 | 2021-04-16 | 云南省烟草公司文山州公司 | Preparation method of composite board taking flue-cured tobacco straw as raw material and board |
-
2009
- 2009-10-16 CN CN200910308325A patent/CN101691044A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101898382A (en) * | 2010-05-07 | 2010-12-01 | 宋庆华 | Production method and manufacturing technology for corn stalk moulded board |
| CN102704590A (en) * | 2012-06-01 | 2012-10-03 | 秦皇岛裕源木业有限公司 | Wall board and processing technology thereof |
| CN103978537A (en) * | 2013-02-07 | 2014-08-13 | 富朗投资管理集团(香港)有限公司 | One-time formed methanal-free compound panel and processing technique |
| CN104070591A (en) * | 2014-07-09 | 2014-10-01 | 万华生态板业研究设计（烟台）有限公司 | Artificial board made of crop straw and method for manufacturing artificial board made of crop straw |
| CN105363762A (en) * | 2015-11-28 | 2016-03-02 | 武汉精英聚园科技有限公司 | Method for making plates by using waste corn stalks |
| CN106508486A (en) * | 2016-12-30 | 2017-03-22 | 黑龙江彤洲生物肥制造有限公司 | Pressing system and technique for pressing stalk powder into plate culture media |
| CN107415021A (en) * | 2017-06-28 | 2017-12-01 | 北京林业大学 | One kind sound absorption, insulation wood-based plate and preparation method thereof |
| CN112659304A (en) * | 2021-01-29 | 2021-04-16 | 云南省烟草公司文山州公司 | Preparation method of composite board taking flue-cured tobacco straw as raw material and board |
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Open date: 20100407 |