Solvent separation method for coating and soft rubber

A technology of solvent separation and soft glue, which is applied in the preparation of test samples, etc., to achieve the effect of convenient operation, simple process and avoiding secondary pollution

Inactive Publication Date: 2017-02-22
东莞出入境检验检疫局检验检疫综合技术中心 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the prior art, there is no method for completely separating the paint coating and the soft glue on the soft glue substrate according to the diffe

Method used

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  • Solvent separation method for coating and soft rubber
  • Solvent separation method for coating and soft rubber
  • Solvent separation method for coating and soft rubber

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[0029] In order to facilitate the understanding of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments of the specification, but the protection scope of the present invention is not limited to the following specific embodiments.

[0030] The method for separating coating and soft glue solvent of the present invention includes the following steps:

[0031] (1) Cut the soft rubber material coated with paint standard material into a block soft rubber sample with each side less than 20mm, and weigh it to the nearest 0.001g;

[0032] (2) Prepare a paint coating dissolving and extracting device including a glass barrel screen 3 (with a uniformly distributed screen hole diameter of 1-2mm) and a glass digestion tank 4 (such as figure 1 - image 3 As shown), put the small piece of soft rubber sample obtained in step (1) into the glass barrel sieve, and then put the glass barrel sieve into the gla...

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Abstract

The invention discloses a solvent separation method for a coating and soft rubber. The method comprises steps as follows: (1) a soft rubber sample sheared into a piece is weighed; (2) the sample is placed in a paint coating dissolution extraction device and an extracting agent is added for dissolution; (3) the paint coating dissolution extraction device is placed in an ultrasonic water bath for ultrasonic treatment, and an extracted sample and an extracting agent solution with paint dissolved are obtained; (4) the extracted sample is weighed; (5) the extracting agent solution is evaporated to dryness and placed in a graphite digester, aqua regia is added and evaporated to dryness, and separated paint is obtained; (6) the paint is cooled to the room temperature to be measured after volume metering. With the adoption of the method, solvent extraction separation can be performed on the paint coating and the soft rubber effectively, independence of the two different substances, namely, the paint coating and the soft rubber, can be guaranteed, and the detection requirement for plastic toys at home and abroad can be met completely. The method has the advantages that the process is simple, the operation is convenient, secondary pollution can be avoided and the like.

Description

technical field [0001] The invention relates to the field of toy safety detection, in particular to a method capable of separating a paint coating on a soft rubber substrate. Background technique [0002] Currently, the toys sold on the market, according to the CPSIA H.R. 4040 Act of the Consumer Product Safety Commission (CPSC), the 91 / 338 / EEC Directive issued by the European Union and the Restriction of the use of certain Hazardous Substances (RoHS) Directive, as well as the national toy safety standard GB6675 .4-2014, the content of toxic and harmful elements in the accessible paint coating attached to the surface of the toy must be limited. The aforementioned standard-related methods only refer to the appropriate method for obtaining paint coatings from sample substrates. For hard substrates that are easier to scrape off, the general conventional method is to directly scrape the paint coating on the surface with a blade; but for soft rubber substrates that are difficult...

Claims

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Application Information

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IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 黄伟王斌黄雪琳林涛蒋小良温健昌方成杨添旺
Owner 东莞出入境检验检疫局检验检疫综合技术中心
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