Green and environment-friendly recycling method for thermosetting plastic waste

Abstract

The invention discloses a green and environment-friendly recycling method of thermosetting plastic waste, which comprises the following steps of: 1, carrying out physical and chemical pretreatment by using a physical method, namely firstly separating waste and waste thermosetting plastic, cleaning, airing and then coarsely crushing; further superfine crushing is carried out according to the optimal grain size ratio determined by repeated tests, and internal stress is generated under the action of a strong shear knife of a high-speed crusher, so that part of cross-linked bonds are partially damaged; 2, adding a proper amount of adaptive chemical additive and strong-activity resin into the obtained pretreated powder, selectively adding a catalyst for promoting the pretreated powder to carry out optimal bonding reaction according to the strong polarity characteristic of MF, and adding a certain amount of cellulose subjected to surface treatment; all active bonds are further subjected to intermolecular bonding reaction or physical winding through the aid medium under temperature and pressure, so that the mechanical strength, rigidity and toughness are improved, and the usability of the environment-friendly reclaimed material is finally improved.

Description

technical field [0001] The invention relates to the technical field of recycling of thermosetting plastics, in particular to a green and environmentally friendly recycling method of thermosetting plastic wastes. Background technique [0002] Melamine-formaldehyde molding compound is a kind of thermosetting plastic, which is not melted (insoluble and insoluble) after one-time molding, also known as melamine molding compound and amino molding compound (also known as melamine). Due to the unique rigidity of its highly cross-linked network molecular structure, it surpasses ceramics in some aspects and becomes the ideal mainstream material for tableware in our lives. It can be made into any color, style, and durable and durable. All kinds of daily necessities at the same time rejected possible heavy metal pollution. [0003] However, in the production of these kitchen utensils, tableware and various kinds of daily necessities, it cannot be recycled and reused like thermoplastics...

AI Technical Summary

Problems solved by technology

Because its rigidity may also cause animal scratches, and incineration also pollutes the environment and wastes resources, because it is a polymer that is artificially synthesized from resource materials such as melamine (nearly 60% nitrogen content) and raw wood pulp fibers. In view of the increasingly tense global resources, the intensification of environmental pollution and the strengthening of environmental protection in my country has become a national policy, it is urgent to increase the scientific and technological treatment of thermosetting plastic waste