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Method for separating resin

A resin separation and resin technology, applied in the field of resin separation, can solve the problems of difficulty in dealing with specific gravity separation and inability to separate

Inactive Publication Date: 2011-05-04
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the wet specific gravity separation, a large amount of drainage occurs and polystyrene (hereinafter referred to as PS) and acrylonitrile-butadiene-styrene (hereinafter referred to as ABS) with similar specific gravity cannot be separated have become major problems.
In addition, in recent years, the demand for filler-filled polypropylene composites with high specific gravity is also expanding, which is difficult to cope with the conventional specific gravity separation

Method used

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  • Method for separating resin
  • Method for separating resin
  • Method for separating resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0047] Figure 1 ~ Figure 1 4 represents Embodiment 1 of the present invention.

[0048] figure 1 (a)~ figure 1 (f) shows the step of separating the resin from the object to be separated, which is a mixture of two kinds of resins, the first resin 1 and the second resin 2 having different glass transition temperatures and yield stresses.

[0049] figure 1 In (a), the object to be separated is placed on the separation member 3 . Here, the glass transition temperature of the first resin 1 is lower than the glass transition temperature of the second resin 2 .

[0050] figure 1 In (b), the 1st heating is performed. The heating temperature at this time is a temperature between the glass transition temperatures of the first resin 1 and the second resin 2 .

[0051] At this time, the first resin 1 and the second resin 2 are pressed against the separation member 3 by the flat plate 4 . The magnitude of the pressurized force is the same as or above the compressive yield stress o...

Embodiment 1

[0066] The method of separating the desired resin from the separation object containing PP and PS will be described.

[0067] Here, the first resin 1 is PP, and the second resin 2 is PS.

[0068] The separation part 3 and the object to be separated are loaded on the pressure plate of the plate press, and a 3.0mm spacer is sandwiched to achieve a predetermined thickness, and the pressure is applied for 60 seconds to further remove the resin below 1.0mm. The thickness in the pressing direction is made uniform within the range of not less than 1.0 mm and not more than 3.0 mm.

[0069] In addition, the compression method of using a roller press instead of a flat press can also homogenize the resin to the desired thickness. When using a roller press, regardless of the vertical or horizontal type, the thickness of the resin can be continuously uniformed. At this time, by optimizing and optimizing the roll gap (roll gap), the diameter of the roll, the number of rotations of the roll...

Embodiment approach 2

[0119] Figure 15 ~ Figure 17 Embodiment 2 of this invention is shown.

[0120] Figure 15 (a)~ Figure 15 (f) shows a step of separating resins from a separation target object in which three kinds of resins, the first resin 6 , the second resin 7 , and the third resin 8 having different glass transition temperatures and yield stresses, are mixed.

[0121] Figure 15 In (a), the object to be separated is placed on the separation member 3 . Here, the glass transition temperature of the first resin 6 is lower than the glass transition temperature of the second resin 7 . The glass transition temperature of the second resin 7 is lower than the glass transition temperature of the third resin 8 .

[0122] Figure 15 In (b), the 1st heating is performed. The heating temperature at this time is not less than the glass transition temperature of the first resin 6 and lower than the glass transition temperatures of the second resin 7 and the third resin 8 .

[0123] At this time,...

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Abstract

To provide a high purity separation method of resin materials, which method does not produce waste water and is not affected by the specific gravities and dielectric characteristics of resin materials, in recycling of resin materials as resources. A separation object including at least two types of resins with different glass transition temperatures (glass transition temperature of a first resin 1 < glass transition temperature of a second resin 2) is placed on a separating member 3. Next, primary heating is applied at a temperature between the glass transition temperatures of the first resin 1 and the second resin 2, and pressurization is additionally performed to cause the first resin 1 to adhere to the separating member 3. Subsequently, a heat history of secondary heating at a temperature higher than the primary heating temperature is applied to detach and recover the second resin 2 by restoring the shape of the second resin 2, while the first resin 1 adhering to and retained by the separating member 3 is detached by a blade 5 and the like for recovery.

Description

technical field [0001] The present invention relates to a technique for separating resin from a separation object mixed with resin chips for recycling waste household electrical appliances. Background technique [0002] In recent years, mass production, mass consumption, and mass waste economic activities have caused global environmental problems such as the greenhouse effect and resource depletion. Under such circumstances, in order to build a recycling-oriented society, the Home Appliance Recycling Law was implemented in April 2013, and the recycling of waste air conditioners (air conditioners), TV tubes, refrigerators, freezers, and washing machines has been made compulsory. [0003] In the past, after useless home appliances were broken in home appliance recycling factories, different materials were separated and recovered by using magnetism, wind, vibration, etc., for recycling. Especially for metal materials, various materials such as iron, copper, and aluminum can be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B17/02
CPCB29B17/02B29B2017/0203B29B2017/0258Y02W30/62
Inventor 宫坂将稔小岛环生矶见晃田端大助中裕之酒井弥彦
Owner PANASONIC CORP