Method of producing composite articles from lignocellulose materials containing sugar

专利摘要:
A low cost process of making composite products from sugar containing lignocellulosic materials, such as sugarcane bagasse and stalks of sorghum, corn, sunflower, flax, and the like, utilizing the residual sugars as bonding and strengthening agent. Comminuted sugar containing lignocellulosic material wholly composed of or partially in combination with other lignocellulosic materials, in the absence of adhesive binders or bonding agents. is molded at a temperature of at least 180 DEG C and a pressure and for a time sufficient to compound the material into a composite product. The free sugars in lignocellulosic materials act as a thermosetting adhesive binder, and provide both bonding and strengthening effect. The composite thus products possess great strength and excellent dimensional stability. These results are obtained to the greatest extent when the lignocellulosic materials contain higher proportion of sugars.
公开号:SU1212318A3
申请号:SU833656698
申请日:1983-10-28
公开日:1986-02-15
发明作者:Сен Куо-Ченг
申请人:Содзи Охота (Фирма)；
IPC主号:

专利说明:

"
The invention relates to the production of composite products from sugarcane marc, sorghum stalks, corn stalks, sunflower stalks, flax stalks and other lignocellulose materials, especially non-wood plants, containing sugars, carbohydrates or sugars, which are soluble in water and easily extracted.
The purpose of the invention is to simplify the process by eliminating the processing of particles of a material by a binder.
The invention is illustrated by the following examples.
Example 1. Dried squeeze of sugar cane with a moisture content of 3.8% is obtained at a standard processing plant. You have a fat content of 7.2% by weight of water-soluble substances, of which 4.7% comes from low molecular weight sugars (e.g. glucose). In addition, the squeeze contains about 70% genuine fiber and 30% of the core.
The squeeze is crushed with a hammer mill to produce two particle fractions. The particles passing through the 16th mesh sieve are used for the front layer, and the particles larger than 16th mesh are used as the central layer of the material dp of the three-layer mat. Attitudes of the front and central layers calculated on a dry weight of 1: 1. From the mat get a board size
Content, based on the weight of dry fiber marc.
50
Each batch of marc is made with boards of 500 x X 500 x 11.1 mm and density of 0.70 using three different pressing temperatures (l80, 210 and 240 s), two different pressing times (10 and 20 minutes, and at pressing 3.4 MPa.
ten
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500x500x11.1 mm by hot pressing for 12 minutes to a specific weight of 0.72 at 235 ° C and a increase of 2.8 MPa. In the process of hot pressing, apart from moisture, a certain amount of substances in the form of steam and various foams occurs (the weight loss is 8.4%, which is significantly more than the moisture content in the mat). The modulus of elasticity of the finished product is MOR 16.3 MPa and the modulus of elasticity MY 3.8 GPa.
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sugar cane, obtained from a sugar cane separator, is treated to remove the sugars by boiling in water. Three batches of marc are subjected to boiling for 5, 10 and
 30 minutes, respectively, the fourth batch is not boiled (control). After boiling, the squeeze is dried to a moisture content of 8% and then crushed out with a hammer mill into fractions of ± 20 mesh, obtained using a sieve. Chemical analysis indicates that the content of residual sugars is inversely proportional to the boiling time of the sample. The results also show an almost linear relationship between the amount of water-soluble substances and the residual. sugars.
Table 1 presents the results of boiling treatment.
Table 1
The moisture content in the front layer of the board is 9, at the core of the board - 3.0%. The ratio of the dry weight of the front part and the core of the mat is 55 lts 1: 1.

The properties of the boards are presented in table 2.
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From the results shown in Table 2, it can be seen that the properties of the boards improve when the sugar content of the squeeze increases. Increasing the pressing temperature and increasing the pressing time also improves the quality of the board. Furniture squeeze board has a dense smooth surface and dark brown color mainly due to very fine particles and high sugar and moisture content in the front layer of the mat.
Froze Sweet weed stalks, which contain about 18% low molecular weight sugars, are dried to a moisture content of 3%, crushed with a hammer mill and passed through a 20 mesh sieve. From this base, a board is sized 500x500 x X 11.1 mm, density 0.74 at 235 C and a pressure of 2.8 MPa for 10 minutes.
Tests show that the MOR dry board is 18.5 MPa wet
88
9.2 MPa, internal bond strength 480 kPa.
PRI me R 4. Corn stalks containing 12% soluble substances or about 7% low molecular weight sugar, dried to a moisture content of 3%, crushed with a hammer mill and passed through a 20 mesh sieve. From this base is made
board size 500x500x11.1 mm, density 0.82.
The tests show that the MOR of a dry board is 14.3 MPa, a wet one is 7.4 MPa, and the internal bond strength is 320 kPa.
Thus, the invention makes it possible to manufacture composite products with a significant simplification of the technological process by eliminating the processing of particles of material by the binder.

权利要求:
Claims (1)
[1]
METHOD FOR PRODUCING COMPOSITE PRODUCTS FROM LIGNO CELLULAR MATERIALS CONTAINING SUGAR, including grinding material into particles and drying, particle fractionation, molding into a mat and hot pressing, characterized in that, in order to simplify the technological process by excluding the processing of material particles with a binder, fibers, and hot pressing is carried out at 180-240 C for 10-20 minutes.
>

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同族专利:

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公开号 | 公开日

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GB8323003D0|1983-09-28|

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DK554583D0|1983-12-01|

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MX172616B|1994-01-03|

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BR8306450A|1985-03-12|

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GB2142943B|1987-03-25|

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IT1169684B|1987-06-03|

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FR2549768A1|1985-02-01|

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JPS6030309A|1985-02-15|

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ZA838301B|1984-07-25|

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DK554583A|1985-01-08|

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PH19188A|1986-01-23|

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DE3333032A1|1985-01-24|

引用文献:

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RU2458148C2|2010-09-21|2012-08-10|Российская академия сельскохозяйственных наук Государственное научное учреждение Всероссийский научно-исследовательский институт электрификации селького хозяйства Российской академии сельскохозяйственных наук |Method for production of cow parsnip white sugar|LU30302A1|

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FR1460600A|1965-07-19|1966-03-04|Processing of sugar cane to obtain construction materials as by-products|

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JPH11318669A|1997-12-16|1999-11-24|Changrong Wang|Manufacturing of packaging material and sheet from stem of plant|

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法律状态:

优先权:

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申请号 | 申请日 | 专利标题

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JP58124224A|JPS6030309A|1983-07-07|1983-07-07|Manufacture of composite product from lignocellulose material|

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