A method and device for identifying whether sanitary paper is mixed with recycled fibers
A technology of toilet paper and recycled fiber, which is applied in the field of papermaking industry, can solve the problems of misjudgment, time-consuming, and difficulty in identifying toilet paper, etc., and achieve the effect of simple operation, objective and accurate results, and small size
Inactive Publication Date: 2017-02-08
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
This method is not only time-consuming, but also prone to misjudgment, it is difficult to distinguish the difference between toilet paper mixed with a small part of recycled fiber and toilet paper produced from virgin pulp
Method used
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[0033] Such as figure 1 --9 shown. The device of the present invention for identifying whether sanitary paper is mixed with recycled fibers includes a shell 1, a glass sheet 5 embedded at the bottom of the shell, a diffuse reflection optical fiber device 4 placed close to the glass sheet 5, a near-infrared light source 2, a near-infrared detection 器8, incident fiber 3, reflection fiber 7;
[0034] The near-infrared detector 8 is connected to the diffuse emission fiber device 4 through the reflective fiber 7, and the near-infrared light source is connected to the diffuse emission fiber device 4 through the incident fiber 3. Its function is to project the light emitted by the near-infrared light source 2 onto the sample 6, and then The diffusely reflected light after radiation on the sample 6 is sent to the near-infrared detector 8.
[0035] The device also includes: an analog-to-digital converter 9 and a microprocessor 10; the analog-to-digital converter 9 is connected to the near-i...
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The invention discloses a method and a device for identifying whether toilet paper is mixed with reclaimed fiber or not. The device comprises a diffuse reflection optical fiber device, a near infrared light source and a near infrared detector, wherein the diffuse reflection optical fiber device clings to a glass sheet; the near infrared light source and the near infrared detector are connected with the diffuse reflection optical fiber device; the diffuse reflection optical fiber device is connected with the near infrared light source by an incident optical fiber, and is connected with the near infrared detector by a reflective optical fiber; the device also comprises an analog-digital converter and a microprocessor; the analog-digital converter is closely connected with the near infrared detector; the microprocessor comprises a data processing module and a display recording device. The method comprises the steps of carrying out multipoint spectrum scanning on a sample to be tested by using the device, sequentially carrying out wavelet transformation denoising, first-order derivative processing, characteristic wave band extraction and mean centering processing on the scanned spectral data, and then inputting the processed data into a classification and discrimination model; analyzing the data by classification and discrimination model to obtain the judgment result. According to the method and the device, the operation is rapid, simple and convenient, sample treatment does not need to be carried out, and the detection result can be obtained on site, and is objective and accurate.
Description
Technical field [0001] The invention relates to the field of papermaking industry, in particular to a method and a device for identifying whether sanitary paper is mixed with recycled fibers. Background technique [0002] Sanitary paper (referring to facial tissues, napkins, toilet paper towels, etc.) is one of the consumer goods that people use in daily life. Since it is in contact with the human body during use, it is directly related to human health. In view of the fact that some residual chemical substances (such as fluorescent brighteners, heavy metals, mineral oil, deinking agents, bleaching agents, etc.) in recycled fibers from waste paper are very harmful to the human body, some countries and regions have legislated to prohibit them here Used or mixed with recycled fiber (recycled fiber) in the production of sanitary paper. Therefore, an effective and reliable method for identifying recycled fibers is an important prerequisite for the implementation of the quality and s...
Claims
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IPC IPC(8): G01N21/359
Inventor 辛丽平柴欣生
Owner SOUTH CHINA UNIV OF TECH