Method for measuring water resistance and water permeability of latex film

A technology of latex film and water permeability, applied in the field of pesticides, can solve the problems of difficult target judgment, cumbersome experimental steps, and insufficient expression, and achieve the effects of easy judgment and calculation, accurate measurement, and reduced impact

Inactive Publication Date: 2009-09-02
北京农产品质量检测与农田环境监测技术研究中心
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  • Abstract
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  • Application Information

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Problems solved by technology

This method has high requirements for experimental materials and latex film testing. The latex film made by the film-forming agent is relatively fragile and is easily broken by the gravity of water in this method, and the ex

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  • Method for measuring water resistance and water permeability of latex film
  • Method for measuring water resistance and water permeability of latex film
  • Method for measuring water resistance and water permeability of latex film

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Embodiment Construction

[0018] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0019] Such as figure 1 Shown, the present invention provides a kind of method for measuring latex film water resistance and water permeability, described method comprises the steps: the latex film to be measured is wrapped on a port of the open glass tube at both ends; Predetermined water volume W; record the moment t when water starts to contact the latex film 1 , the time t when the latex membrane starts to seep 3 , the time t when the latex film dissolves 2 And the remaining water volume W at the time of the latex film melting 1 ;Use T1=t 3 -t 1 Calculate the water penetration time T1 of the latex film, using T2=t 2 -t 3 Calculate the dissolution time T2 of the latex film, and use the sum of T1 and T2 as t 2 -t 1 Calculate the water resistance of latex film; S6, utilize P=[(W-W 1 ) / W]×100% to calculate the water permeabil...

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Abstract

The invention relates to a method for measuring the water resistance and the water permeability of a latex film. The method utilizes an L-shaped glass tube with a scale and both open ends as a measuring instrument; the latex film to be measured is wrapped by one end of the glass tube, water is injected into the glass tube from the other end, and the water resistance and the water permeability of the latex film are calculated by the water-permeability time, the meltdown time, and the like of the latex film. With the design of the L-shaped glass tube, the method can measure the two indexes of the water resistance and the water permeability of the latex film simultaneously, rapidly, simply, conveniently and accurately.

Description

technical field [0001] The invention relates to the technical field of pesticides, in particular to a method for measuring the water resistance and water permeability of latex films. Background technique [0002] Film-forming agent is one of the auxiliaries of pesticide seed coating agents, and is the key functional component of seed coating. The introduction of the film-forming agent enables the seed coating agent to form a film on the surface of the seed, thereby distinguishing it from seed treatment dry powder, dispersible powder, liquid and other dosage forms. The main function of the film-forming agent in the seed coating agent is to adhere its active ingredients to the surface of the seed and form a uniform and smooth drug film. For film-forming agents, on the one hand, it is required to have strong water resistance and not be dissolved by water in soil with high moisture content; on the other hand, it must allow the water required for seed germination to pass through...

Claims

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Application Information

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IPC IPC(8): G01N15/08
Inventor 潘立刚韩平王纪华平华
Owner 北京农产品质量检测与农田环境监测技术研究中心
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