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Method for recycling waste artificial turf based on solid-phase mechanochemistry technology and material recycled by same

A technology of artificial turf and chemical technology, applied in the field of a method and its recycled materials, can solve problems such as poor compatibility, achieve stable performance, high added value, and solve the effects of poor component compatibility

Active Publication Date: 2016-06-29
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems existing in the prior art. First, it provides a method for reclaiming waste artificial turf based on solid-phase force chemistry technology. This method can fully utilize thermoplastic components and thermosetting adhesives without separation and classification. Can solve the problem of poor compatibility between components

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The discarded artificial turf with a polyolefin content of 84wt%, a polyester content of 14wt%, and a sediment content of 2wt% is directly cut into pieces of about 10cm*10cm, and then crushed into broken materials with a powerful crusher; The waste artificial turf crushed material is ground three times in a conventional high-speed mill to obtain the primary powder of the artificial turf; the primary powder is put into a solid-phase force chemical reactor for grinding, and cooling circulating water is introduced during the grinding process. Control the surface temperature of the grinding disc in the solid-phase mechanochemical reactor to 15°C, the pressure to 18KN, the rotation speed to 200 rpm, and 10 cycles of grinding to obtain the waste artificial turf powder material.

[0025] The obtained waste artificial turf powder material has an average particle diameter of 52um and a melt index of 1.8g / 10min.

Embodiment 2

[0027] The waste artificial turf with a polyolefin content of 65wt%, a polyester content of 28wt%, and a silt content of 7wt% is directly cut into pieces of about 10cm*10cm, and then crushed into broken materials with a powerful crusher; the above The waste artificial turf crushed material is ground 5 times in a conventional high-speed mill to obtain the primary powder of the artificial turf; the primary powder is put into a solid-phase force chemical reactor for grinding, and cooling circulating water is introduced during the grinding process. Control the surface temperature of the grinding disc in the solid-phase force chemical reactor to 40°C, the pressure to 30KN, the rotation speed to 400 rpm, and cycle grinding for 20 times to obtain the waste artificial turf powder material.

[0028] The obtained waste artificial turf powder material has an average particle diameter of 127um and a melt index of 1.3g / 10min.

Embodiment 3

[0030] The waste artificial turf with polyolefin content of 65wt%, polyester content of 28wt%, and sediment content of 7wt% is directly cut into long strips with a width of about 3 cm, and then pelletized into pellets by single-screw melt extrusion; The pellets are ground twice in a conventional high-speed mill to obtain the primary powder of artificial turf; the primary powder is put into a solid-phase force chemical reactor for grinding, and cooling circulating water is introduced during the grinding process to control the solid phase. Phase chemical reactor milling disc surface temperature 10 ℃, pressure 15KN, rotation speed 150 rpm, cyclic grinding 5 times, that is, the waste artificial turf powder material.

[0031] The obtained waste artificial turf powder material has an average particle diameter of 189um and a melt index of 0.9g / 10min.

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Abstract

The invention discloses a method for recycling waste artificial turf based on solid-phase mechanochemistry technology and a material recycled by the same. The method comprises the following steps: directly putting the broken waste artificial turf or extruded aggregates into a high-speed pulverizer for circularly pulverizing for 1-5 times; putting the obtained primary powder into a solid-phase mechanochemical reactor for circularly grinding for 3-20 times; or continuously performing melt extrusion of the powder material to obtain a powder material containing 65-84wt% of polyolefin, 14-28wt% of polyester and 2-7wt% of silt and with the melt index of 0.9-1.8g / 10min and the average particle size of 52-283mu m or an aggregate material with the melt index of 1.2-1.8g / 10min, the tensile strength of 7.4-11.2Mpa and the breaking elongation of 237-336%. In the invention, the desire of no separation or classification or much washing can be truly realized in a process of recycling waste artificial turf, and the recycling technology is simple and efficient and is low in cost; and meanwhile, the high-performance high-value recycled waste artificial turf material enabling direct blending and melting processing and having good compatibility can be obtained.

Description

technical field [0001] The invention belongs to the technical field of recycling methods and materials for waste artificial turf, and in particular relates to a method for recycling waste artificial turf based on solid-phase force chemistry technology and the recovered materials. Background technique [0002] In recent years, artificial turf has greatly enriched the national fitness movement, with an annual growth rate of about 20-25%, and the worldwide usage has reached more than 200 million square meters. Generally, the service life of artificial turf is 5-10 years. The artificial turf with high requirements must be replaced even after one use. If the replaced artificial turf cannot be recycled, it will cause huge environmental pollution and waste of resources: for example, replacing The artificial turf polymer material produced by a standard football field is as high as 10-12 tons (Xu Li, Research on the design and preparation process of adhesive materials for recyclable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/10C08L23/00C08L67/00
CPCC08J11/10C08J2323/00C08J2467/00C08L23/00C08L67/00Y02W30/62
Inventor 王琪白时兵贺攀杨双桥陈英红
Owner SICHUAN UNIV
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