Graphite EPS bead and production technology thereof

A production process and bead technology, which is applied in the field of graphite EPS beads and its production process, can solve the problems of long production cycle, lower product quality and raw material utilization rate, and increase production cost.

Inactive Publication Date: 2014-12-24
南京法宁格节能科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if more than ten kinds of raw materials are added into the reactor at one time, a large amount of impurities will be produced in the reaction process, and the existence of other raw materials will also affect the polymerization of styrene monomer, thereby greatly reducing the quality of the product and the utilization rate of raw materials. The cycle is longer, which increases the production cost

Method used

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  • Graphite EPS bead and production technology thereof
  • Graphite EPS bead and production technology thereof
  • Graphite EPS bead and production technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Material preparation: According to technical requirements, weigh 100 parts of polystyrene particles with a melting index of 12g / 10min, 6 parts of pentane, and 3 parts of surface-modified 200-mesh flake graphite powder;

[0030] 2) Feeding: Heat the co-rotating twin-screw extruder and keep it between 190 and 200°C, then put polystyrene particles, surface-modified graphite powder and flame retardant into the co-rotating twin-screw extruder through the metering device In the extruder, when the raw materials put into the co-rotating twin-screw extruder are melted and melted to a certain viscosity, the prepared foaming agent is injected into the middle section of the co-rotating twin-screw extruder, and then extruded through the co-rotating twin-screw extruder The shearing effect of the machine makes the components and materials mixed and homogenized;

[0031] 3) Cooling and plasticizing: Extrude the mixed melt into a hydraulic screen changer to filter, then inject the me...

Embodiment 2

[0039] 1) Material preparation: According to technical requirements, weigh 100 parts of polystyrene particles with a melting index of 2g / 10min, 15 parts of dichloromethane, 15 parts of surface-modified 600-mesh expandable graphite powder and 2 parts of hexabromocyclododecane share;

[0040] 2) Feeding: Heat the co-rotating twin-screw extruder and keep it between 190 and 200°C, then put polystyrene particles, surface-modified graphite powder and flame retardant into the co-rotating twin-screw extruder through the metering device In the extruder, when the raw materials put into the co-rotating twin-screw extruder are melted and melted to a certain viscosity, the prepared foaming agent is injected into the middle section of the co-rotating twin-screw extruder, and then extruded through the co-rotating twin-screw extruder The shearing effect of the machine makes the components and materials mixed and homogenized;

[0041] 3) Cooling and plasticizing: Extrude the mixed melt into a...

Embodiment 3

[0049] 1) Material preparation: according to technical requirements, weigh 100 parts of polystyrene particles with a melting index of 7g / 10min, 12 parts of R152a, 6 parts of surface-modified 400-mesh expanded graphite powder and 3 parts of hexabromocyclododecane;

[0050] 2) Feeding: Heat the co-rotating twin-screw extruder and keep it between 190 and 200°C, then put polystyrene particles, surface-modified graphite powder and flame retardant into the co-rotating twin-screw extruder through the metering device In the extruder, when the raw materials put into the co-rotating twin-screw extruder are melted and melted to a certain viscosity, the prepared foaming agent is injected into the middle section of the co-rotating twin-screw extruder, and then extruded through the co-rotating twin-screw extruder The shearing effect of the machine makes the components and materials mixed and homogenized;

[0051] 3) Cooling and plasticizing: Extrude the mixed melt into a hydraulic screen ch...

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Abstract

The invention relates to a graphite EPS bead and a production technology thereof. Through the steps of preparing materials, feeding, cooling and plastifying, voltage stabilization and transportation, shaping and bead cutting, dehydrating, sieving, packaging and the like, polystyrene granules, foaming agents, graphite powder with modified surfaces, and fire retardants are mixed to obtain the graphite EPS bead. The polystyrene and other raw materials are directly selected for reaction, the time of the polymerization reaction is shortened, the impurities generated by the incomplete polymerization reaction are reduced, and the quality of products is improved. For the production technology disclosed by the invention, the raw materials of the polystyrene, the graphite powder, the fire retardants and the like are firstly melt, then the liquid foaming agents are added, and the foaming agents and melt bodies are uniformly mixed, so that the quality of the products is ensured, the quality of the products is stable, the granularity is uniform, the foaming rate of the products is ensured, and the production cost is reduced. The production technology is suitable for popularization and usage.

Description

technical field [0001] The invention relates to a graphite EPS bead and a production process thereof. Background technique [0002] At present, the commonly used method for producing graphite EPS (EPS or expandable polystyrene) beads is suspension polymerization. The method of polymerization is called suspension polymerization. The production of graphite EPS beads by the suspension polymerization process is to add styrene monomer, foaming agent, graphite powder and other additives into the reactor for polymerization, that is, polymerization and impregnation are carried out in the same reactor at the same time, and then proceed after the reaction. After centrifugation and drying, graphite EPS beads are finally obtained. However, if more than ten kinds of raw materials are added into the reactor at one time, a large amount of impurities will be produced during the reaction process, and the existence of other raw materials will also affect the polymerization of styrene monome...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08K9/00C08K3/04C08K7/24C08J9/14B29B9/06
Inventor 郭鑫齐张光宇恽晨
Owner 南京法宁格节能科技股份有限公司
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