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Method for testing chemical stability of latex and application of method

A chemical stability and testing method technology, applied in the direction of measuring devices, scientific instruments, instruments, etc., can solve problems such as glue blocking, affecting product quality and cost, gel, etc., to ensure accuracy, prolong heating and stirring time, increase Judging the effect of the difficulty of the gel

Active Publication Date: 2021-07-02
GUIZHOU DAZIRAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the production and use of actual plant fiber products (such as: mattresses, cushions, carpets, etc.), even if the latex that passes the current standard is used, there will still be glue blocking and gelation, which will affect product quality and cost.

Method used

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  • Method for testing chemical stability of latex and application of method
  • Method for testing chemical stability of latex and application of method
  • Method for testing chemical stability of latex and application of method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1. A kind of test method of latex chemical stability, test method is: at 25 ℃ of temperature, under the laboratory environment of relative humidity 75, accurately take by weighing concentration respectively with the beaker of 250mL that concentration is 30% ammonium sulfate (analytical grade) solution 50g and Total alkalinity is 0.70%, total solid content 61.5%, the latex 50g that filters through 60 order stainless steel screens, the method for the ammonium sulfate solution after weighing and latex temperature water bath is adjusted to 25 ℃ respectively. Add the ammonium sulfate solution to the latex, stir with a glass rod at a speed of 3 rpm for 3 seconds, then quickly transfer the beaker containing the latex to an electric heating constant temperature magnetic stirring water bath set at 75°C, and continue stirring , the stirring frequency is 180 rev / min (the constant temperature water surface height is about 1.5 times of the latex liquid level height in the be...

Embodiment 2

[0029] Example 2. A kind of test method of latex chemical stability, test method is: under 24 ℃ of temperature, under the laboratory environment of relative humidity 73.5, be that the ammonium sulfate (analytical grade) solution 49.99g of 30% is accurately weighed respectively with the beaker of 250mL concentration And total alkalinity is 0.70 ± 0.02%, total solid content 61.5 ± 0.3%, latex 49.99g filtered through 60 mesh stainless steel wire mesh, the method for the ammonium sulfate solution after weighing and latex temperature is adjusted to 25 ℃ with water bath . Add the ammonium sulfate solution into the latex, stir with a glass rod at a speed of 3 revolutions per second for 3 seconds, then quickly transfer the beaker containing the latex to an electric heating constant temperature magnetic stirring water bath set at 70°C, and continue stirring , the stirring frequency is 160 rev / min (the height of the constant temperature water surface is about 1.5 times of the latex liq...

Embodiment 3

[0032] Example 3. A kind of test method of latex chemical stability, test method is: under 26 ℃ of temperature, under the laboratory environment of relative humidity 76.5, be that the ammonium sulfate (analytical grade) solution 50.01g of 30% is accurately taken by weighing concentration respectively with the beaker of 250mL And the total alkalinity is 0.70 ± 0.02%, the total solid content is 61.5 ± 0.3%, and the latex 50.01g filtered through 60 mesh stainless steel wire mesh is adjusted to 25 ℃ by the method of water bath of ammonium sulfate solution after weighing and latex temperature . Add the ammonium sulfate solution into the latex, stir with a glass rod at a speed of 3 revolutions per second for 3 seconds, then quickly transfer the beaker containing the latex to an electric heating constant temperature magnetic stirring water bath set at 80°C, and continue stirring , the stirring frequency is 200 rev / min (the constant temperature water surface height is about 1.5 times...

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Abstract

The invention discloses a method for testing the chemical stability of latex and application of the method. According to the testing method, an ammonium sulfate solution and latex are mixed and stirred, timing is started, timing is stopped when gel appears through stirring, and the chemical stability of the latex is judged according to the deadline. The method is applied to plant fiber product production to detect whether the chemical stability of latex is qualified or not. The method overcomes the defect that the chemical stability of the latex cannot be judged according to the current standard, and the latex which is tested to be qualified by the method does not have the phenomena of latex blocking and gelling when being used for producing plant fiber products.

Description

technical field [0001] The invention relates to the technical field of testing the chemical stability of latex, in particular to a method for testing the chemical stability of latex and an application thereof. Background technique [0002] Natural rubber latex belongs to the thermoplastic synthetic resin of rubber, which is characterized by high elasticity, good film-forming performance during bonding, and high flexibility of the film, so that the film has excellent flex resistance, shock resistance and creep resistance. , suitable for the bonding of components under dynamic conditions and the bonding between materials with different thermal expansion coefficients. At present, natural rubber latex is the most widely used adhesive for plant fibers in furniture. [0003] In the production and use of actual plant fiber products (such as: mattresses, cushions, carpets, etc.), even if the latex that passes the current standard is used, glue blocking and gelation often occur, aff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/44
CPCG01N33/445
Inventor 陈宗勇黄照伟刘显科周孝菊
Owner GUIZHOU DAZIRAN TECH
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