Solid elastomer content of natural rubber latexes rapidly-measuring method by hat-radiation pneumatic method
A technology of natural rubber latex and thermal radiation pneumatic method, which can solve the problems of high product price, high failure rate and large sampling volume by removing certain components and weighing, and achieve less sampling volume and low failure rate , the effect of less interference
Inactive Publication Date: 2010-12-08
ANALYSIS & TESTING CENT CHINESE ACADEMY OF TROPICAL AGRI SCI
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Problems solved by technology
The disadvantages are that the sampling volume is large (30-40ml), the interference is more than the drying method, the failure rate is high, frequent maintenance is required, special personnel must be trained to operate, and the product price is high (about 10,000 yuan per unit), so it is difficult to popularize it. Households of growers, only concentrated use in rubber factories and latex purchase stations
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[0012] The present invention will be further described below with non-limiting examples.
[0013] 1. Sample determination
[0014] Receive about 200mL of fresh latex (as it is) from the rubber tree; first weigh and record the weight of the 50ml small beaker with an electronic balance (m 1 ), then weigh 5.00 grams of latex sample (M) in a beaker. Put the weighed sample on the heater for thermal radiation air drying (i.e. put the sample on the heater while thermal radiation and blowing pressure thermal air drying), and then carry out constant weight (m 2 ) calculation, that is, to obtain the content of dry glue, the calculation formula is as follows:
[0015]
[0016] Part of the latex is diluted into 2 parts of diluted latex samples of about 2 times (No. 1 sample) and 5 times (No. 2 sample), and it is carried out to heat radiation pneumatic drying (being about to put the sample on the heater while heat radiation and blowing pressure Thermo-pneumatic drying), and then the ...
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The invention relates to a thermal radiation pneumatic method for fast measuring the dry glue content of natural rubber latex. The method comprises the following steps: thermal radiation is carried out to the weighted latex sample with constant quantity arranged on heat sources; the latex sample is fast heated to more than 300 DEG C, simultaneously, dry hot air with continuous blowing and pressure is introduced to the surface above the latex sample so as to carry out pneumatic drying; the dried sample is calculated by constant weight, namely the content of dry glue is obtained. The thermal radiation pneumatic method has simple technique process, simple operation, little sample quantity, fast measuring speed and small size of the detecting equipment, can accurately measure the latex with various dry glue content, has little interference, low fault rate and accuracy and reliability of measuring results, and not only can be used as accurate rating pricing basis of trade fields of supply and marketing for latex, but also can be popularized to families such as farmers.
Description
technical field [0001] The invention relates to a method for measuring the dry rubber content of natural rubber latex, in particular to a thermal radiation pneumatic method for quickly measuring the dry rubber content of natural rubber latex. Background technique [0002] Natural rubber is an indispensable strategic material for the development of my country's national economy and society. Since its introduction and cultivation, it has been cultivated and planted in many provinces including Hainan, Yunnan, Guangdong, Guangxi, Sichuan, and Fujian. It is a pillar industry for many local people to make a fortune. For a long time, during the rapid development of the natural rubber industry, the rapid and accurate determination of latex dry rubber content has been one of the key issues of the industry. [0003] There are two methods for determining the content of dry glue currently being used in production. One is the drying method, which is an international standard method and ...
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IPC IPC(8): G01N5/04
Inventor 周聪
Owner ANALYSIS & TESTING CENT CHINESE ACADEMY OF TROPICAL AGRI SCI