Modification regeneration plastic grain granulation novel processTechnical field
The present invention relates to resource reutilization technical field, be specifically related to a kind of modification regeneration plastic grain granulation novel process.
Background technology
Polythene material is divided into PE and HDPE, PE and Low Density Polyethylene, its feature intensity and hardness better.HDPE and high density polyethylene(HDPE), its feature snappiness is good, and stretch strong, produce product not easy to crack, both all have good erosion resistance, and electrical insulating property is good, and performance variable range is wide, and are widely used in moulding wood, pipeline, the fields such as sheet material.Polyethylene industry fast development, goods are of a great variety, and output grows with each passing day, and simultaneously also create a large amount of wastes, and these wastes comprise scrap stock in production and the aging various polyethylene products scrapped.Polyethylene waste not only serious environment pollution, is also the significant wastage to resource, becomes problem demanding prompt solution to the recycling of these waste materials.
The recovery method of polyethylene waste material is divided into physiochemical mutagens method and chemical recycling.The main method that current polyethylene is recycled is chemical recycling, namely under the existent condition such as chemical reagent, catalyzer, heat, polyethylene degradation is become the oligopolymer that can re-use or micromolecular compound, thus realizes the recycle of waste.According to the kind of ethylene glycol and the difference of degradation condition, chemical recycling can be divided into hydrolysis method, alkaline hydrolysis, amine-decomposing method, alcoholysis method etc.
Summary of the invention
It is low that technical problem to be solved by this invention is to provide a kind of production cost, energy-conserving and environment-protective, and intensity is high, has certain elastic modification regeneration plastic grain granulation novel process.
Technical problem to be solved by this invention realizes by the following technical solutions:
A kind of modification regeneration plastic grain granulation novel process, comprises following processing step:
1) first PE waste material and HDPE waste material is collected, according to weight ratio, PE waste material: the ratio of HDPE waste material=10:5 is put in supersonic cleaning machine take dehydrated alcohol as dispersion medium, wherein the mass ratio of material and ethanol is 1:15, ultrasonic disperse 1 hour on supersonic cleaning machine; Take out airing, be then ground into sheet stock stand-by;
2) by step 1) in sheet stock send in reactor, heat to about 50 DEG C, add calcium stearate and calcium powder, continuously stirring about 30 minutes, carry out the preliminary modification of raw material, reduce the content of objectionable impurities, obtained modification compound; According to weight ratio, sheet stock: calcium stearate: calcium powder=10:1:1;
3) by step 2) in modification compound drop in roasting plant, shakeout, thickness is at 1-2cm, and low-temperature bake 1.5-3 hour under 40-50 DEG C of environment, adds ethylene glycol after taking-up and antioxidant is uniformly mixed in a kettle., obtained modifying material; According to weight ratio, modification compound: ethylene glycol: antioxidant=10:0.5:0.5;
4) enhancing material is put into nylon ball grinder, take agate ball as abrading-ball, ball material mass ratio is 7:1, is under the condition of 150 revs/min at rotating speed, continuous ball milling 2 hours in ball mill, powder complete for ball milling is poured in powder dish together with agate abrading-ball, toasts 10 minutes at 120 DEG C, the powder of drying is sieved, take out agate abrading-ball, then powder mix is ground, until without till larger reunion, obtain modification batching;
Wherein strengthen material to be made up of tungstate, silicon carbide, powdered iron ore, silicotungstic acid, boron nitride and rare earth, according to weight ratio be, tungstate: silicon carbide: powdered iron ore: silicotungstic acid: boron nitride: rare earth=1:1:1:1:1:1;
5) by step 3) in modifying material and step 4) in modification prepare burden and stir in stirrer, time controling is at 20-30 minute, and stirrer rotating speed is at 800-1200r/min; According to weight ratio be, modifying material: modification batching=10:2 allocates;
6) by step 5) in the material that is stirred melt when granulator heating to 200 DEG C, extrude block through bistrique, then broken, obtain modified plastic particles.
The invention has the beneficial effects as follows: the present invention utilizes advanced reduction technique, effectively decompose by ultrasonic cleaning and other auxiliary agent, to be added in the technique of PE+HDPE granulation after useful component reduction wherein, modified particles is made to have the qualities such as good suppleness, toughness and glossiness, by increasing the compositions such as tungstate, silicon carbide, powdered iron ore, silicotungstic acid, boron nitride, make product not fragile, intensity is high, good springiness.
Embodiment
The technique means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with specific embodiment, setting forth the present invention further.
A kind of modification regeneration plastic grain granulation novel process, comprises following processing step:
1) first PE waste material and HDPE waste material is collected, according to weight ratio, PE waste material: the ratio of HDPE waste material=10:5 is put in supersonic cleaning machine take dehydrated alcohol as dispersion medium, wherein the mass ratio of material and ethanol is 1:15, ultrasonic disperse 1 hour on supersonic cleaning machine; Take out airing, be then ground into sheet stock stand-by;
2) by step 1) in sheet stock send in reactor, heat to about 50 DEG C, add calcium stearate and calcium powder, continuously stirring about 30 minutes, carry out the preliminary modification of raw material, reduce the content of objectionable impurities, obtained modification compound; According to weight ratio, sheet stock: calcium stearate: calcium powder=10:1:1;
3) by step 2) in modification compound drop in roasting plant, shakeout, thickness is at 1-2cm, and low-temperature bake 1.5-3 hour under 40-50 DEG C of environment, adds ethylene glycol after taking-up and antioxidant is uniformly mixed in a kettle., obtained modifying material; According to weight ratio, modification compound: ethylene glycol: antioxidant=10:0.5:0.5;
4) enhancing material is put into nylon ball grinder, take agate ball as abrading-ball, ball material mass ratio is 7:1, is under the condition of 150 revs/min at rotating speed, continuous ball milling 2 hours in ball mill, powder complete for ball milling is poured in powder dish together with agate abrading-ball, toasts 10 minutes at 120 DEG C, the powder of drying is sieved, take out agate abrading-ball, then powder mix is ground, until without till larger reunion, obtain modification batching;
Wherein strengthen material to be made up of tungstate, silicon carbide, powdered iron ore, silicotungstic acid, boron nitride and rare earth, according to weight ratio be, tungstate: silicon carbide: powdered iron ore: silicotungstic acid: boron nitride: rare earth=1:1:1:1:1:1;
5) by step 3) in modifying material and step 4) in modification prepare burden and stir in stirrer, time controling is at 20-30 minute, and stirrer rotating speed is at 800-1200r/min; According to weight ratio be, modifying material: modification batching=10:2 allocates;
6) by step 5) in the material that is stirred melt when granulator heating to 200 DEG C, extrude block through bistrique, then broken, obtain modified plastic particles.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.