CN105504742A - Method for preparing novel enhanced polycarbonate material by using waste/used compact discs and printed circuit boards - Google Patents

Abstract

The invention relates to recycling of nonmetallic granules resulting from waste compact discs and crushed printed circuit boards and belongs to the technical field of regeneration and utilization of wastes. The invention is based on two kinds of wastes, i.e., a polycarbonate material obtained through treating the waste compact discs and the nonmetallic granules resulting from the printed circuit boards, and a novel nonmetallic granule enhancing polycarbonate material is obtained through mixing the two kinds of wastes under the conditions of controlling the granularity of the nonmetallic granules to 50-200 meshes and controlling the added ratio of the nonmetallic granules to 10-15%. The mechanical strength of the polycarbonate material obtained through recycling the waste compact discs is greatly lowered and thus cannot meet the requirements of polycarbonate materials on application strength; the resource-converting of the two kinds of wastes is achieved, and the novel nonmetallic granule enhancing polycarbonate material, of which the mechanical strength reaches the use standard of the polycarbonate materials, is obtained.

Description

The method of novel enhanced polycarbonate material is prepared with waste disk and printed circuit board (PCB)

Technical field

The present invention relates to the recycling of the non-metallic particle of abandoned optical discs and the generation of broken printed circuit board (PCB), belong to the technical field of regenerated resource development and utilization and type material synthesis.

Background technology

Along with the fast development of Cd Industry, disc manufacturing yield and consumption, also in continuous increase, directly cause the accumulation year by year of waste disk.The composite prod that CD is made up of multilayer constituent materials, dish base adheres to record, reflection successively, prints the functional layers such as one-level protection, but the character of each functional layer differs greatly and the manufactured materials of different types of optical disks is also different.CD is divided by its function as not erasable optical disk, as CD-ROM, DVD-ROM and erasable optical disk, as CD-RW, DVD-RAM and write formula cd cd-R.With regard to CD, its basic structure by polycarbonate (PC) substrate, aluminium reflecting layer and ultraviolet curing glue (UV) three layers composition, have at least in material composition more than 93% be polycarbonate, also comprise a small amount of zinc, silicon, gold and the multiple useful element such as silver-colored.

At present Physical and chemical method are divided into waste disk resource technology.Physical method is mainly mechanical crushing method, and direct application machine device rubs to CD, upper layer and reflecting layer is ground off from CD.This kind of method choice face is wider, and raw material does not need classification, can realize full-automation.Shortcoming is that coefficient of losses is beaten, and cannot reclaim metal in reflecting layer.Chemical method is the metal reaction utilizing stripper and the reflecting layer such as alkali or acid, makes resultant can pass into solution, and protection glue-line and printed layers are stripped down these method wastage rate low, recoverable metal, priming cost is cheap simultaneously, but may cause the secondary pollution of stripper.Physical and chemical method finally all can obtain optical disk substrate polycarbonate material, are mainly divided into burning method, landfill method and melting method of reproduction to the process of PC.Although burning method has, treatment capacity is large, efficiency advantages of higher, can produce a large amount of obnoxious flavoures, comprise carcinogenic substance, work the mischief to air and environment, and facility investment maintenance cost is high after burning.And polycarbonate belongs to high molecular polymer, be difficult to degraded in the environment, landfill method is not a kind of reasonably treatment process.Melting regeneration polycarbonate is carried out broken dry extruding pelletization to carry out the new PC product of melting regeneration making.

Printed circuit board (PCB) is as the indispensable part of electronic product, its baseplate material is generally fiberglass reinforced phenolic resin or epoxy resin, it welds various component, wherein comprises a large amount of callable metal and nonmetal component, there is higher resource reclaim and be worth.At present three classes are mainly comprised to the recycling technology of abandoned printed circuit board:

Thermal treatment, comprises burning, pyrolysis, directly smelts, and the method process is relatively simple, and has some superiority subtracting to hold in decrement, treatment scale and efficiency, but environmental pollution is serious.Method of chemical treatment, mainly uses acid, and ionic liquid etc. process wiring board, but this method can not process the circuit card of structural constituent complexity and vat liquor and residue generally have corrodibility or toxicity, easily causes secondary pollution.Mechanical-physical facture is the method for current domestic topmost waste printed circuit board recycling, its flow process is mainly carries out one-level fragmentation, two-stage crushing to circuit card, then metallic substance and non-metallic material is separated by sorting modes such as electrostatic, magnetic force, gravity.Non-metal powder composition is wherein mainly glass fibre and thermosetting epoxy resin, and the method advantage is that technique is simple, and Financial cost is low, little to environmental influence.

Summary of the invention

For the large unmanageable feature of generation of the non-metallic particle that current abandoned optical discs and smashing waste printed circuit board (PCB) obtain, and the waste disk polycarbonate disc base physical strength reclaimed significantly declines and again cannot utilize the waste causing resource, carry out waste disk processing the polycarbonate disc base that obtains and non-metallic particle to carry out melting mixing granulation and obtain the polycarbonate material that novel non-metallic particle strengthens, thus achieve the resource utilization of two kinds of waste materials.

The non-metallic particle that waste disk and discarded printed circuit boards fragmentation produce prepares a method for novel enhanced polycarbonate material, it is characterized in that having following technological process and step:

A) sodium hydroxide solution of waste disk 1mol/L is soaked, obtain pure polycarbonate disc base after process 4h, cleaning, broken, dry;

B) non-metallic particle obtained by waste and old circuit board cracking and sorting mixes high-speed stirring 20min with silane coupling agent with 100:1 solid-to-liquid ratio and carries out modification to it, filters out the varigrained particle of 50 ~ 200 order after oven dry;

C) after modified varigrained non-metallic particle being passed through homogenizer stirring and evenly mixing with the mass ratio of 10% ~ 15% and the polycarbonate pellets of fragmentation, with twin screw extruder high-temperature fusion extruding pelletization, then obtain new reinforced polycarbonate material with injection moulding machine.

The recovery polycarbonate that the inventive method waste disk obtains and the non-metallic particle that waste printed circuit board obtains are mixed to get strongthener under certain condition, namely the problem that the process solving CD and non-metallic particle waste material is disposed, achieves again the resource utilization of two kinds of waste materials.In addition, waste circuit board non-metal particle is added recovery polycarbonate as toughener, make it all be significantly improved in physical strength, dimensional stability etc., become high potentiality type material.

Embodiment

After now embodiments of the invention being described in.

Embodiment 1

By the sodium hydroxide solution of waste disk 1mol/L soak 4h, obtain polycarbonate disc base, clean, drying, broken.The circuit board non-metal particle of fragmentation is mixed high-speed stirring 20min with silane coupling agent with 100:1 solid-to-liquid ratio and modification is carried out to it, dry for standby.The circuit board non-metal particle of fragmentation is mixed high-speed stirring 20min with silane coupling agent with 100:1 solid-to-liquid ratio and modification is carried out to it, dry for standby.It is the broken circuit board non-metal particles of 50 object modifications that the broken polycarbonate pellets prepared of the amount of taking fully adds granular size with 100:12 mass ratio, after mixing rear twin screw extruder extruding pelletization, injection moulding machine obtains standard test models, be recycled strongthener tensile strength be 35MPa, flexural strength is 78MPa, and heat-drawn wire is at 148 DEG C.

Embodiment 2

By the sodium hydroxide solution of waste disk 1mol/L soak 4h, obtain polycarbonate disc base, clean, drying, broken.The circuit board non-metal particle of fragmentation is mixed high-speed stirring 20min with silane coupling agent with 100:1 solid-to-liquid ratio and modification is carried out to it, dry for standby.It is the broken circuit board non-metal particles of 160 object modifications that the broken polycarbonate pellets prepared of the amount of taking fully adds granular size with 100:12 mass ratio, after mixing rear twin screw extruder extruding pelletization, injection moulding machine obtains standard test models, be recycled strongthener tensile strength be 55MPa, flexural strength is 80MPa, and heat-drawn wire is at 150 DEG C.

Claims (1)

1. prepare a method for novel enhanced polycarbonate material with the non-metallic particle that waste disk and discarded printed circuit boards fragmentation produce, it is characterized in that there is following technological process and step:

A) sodium hydroxide solution of waste disk 1mol/L is soaked, obtain pure polycarbonate disc base after process 4h, cleaning, broken, dry;

B) non-metallic particle obtained by waste and old circuit board cracking and sorting mixes high-speed stirring 20min with silane coupling agent with 100:1 solid-to-liquid ratio and carries out modification to it, filters out the varigrained particle of 50 ~ 200 order after oven dry;

C) after modified varigrained non-metallic particle being passed through homogenizer stirring and evenly mixing with the mass ratio of 10% ~ 15% and the polycarbonate pellets of fragmentation, with twin screw extruder high-temperature fusion extruding pelletization, then obtain new reinforced polycarbonate material with injection moulding machine.