Production method of high-welding-performance expandable polystyrene (EPS)

Abstract

The invention discloses a production method of high-welding-performance expandable polystyrene (EPS). The production method includes the steps of firstly, adding styrene, DCP, flame retardant, white oil and sodium dodecyl benzene sulfonate in a reaction kettle; secondly, sequentially adding purified water, trisodium phosphate, active calcium phosphate, emulsifier SDBS and anhydrous sodium sulfate; thirdly, adding a low-temperature initiator, a high-temperature initiator, other initiators and nucleating agent polyethylene wax; fourthly, feeding steam into the jacket of the reaction kettle to heat the materials in the reaction kettle from room temperature to 88-91 DEG C, and performing constant-temperature granulation; fifthly, adding calcium phosphate and ash calcium powder; sixthly, adding a foaming agent, and feeding steam into the jacket of the reaction kettle to perform slow temperature rising; seventhly, heating to 123-127 DEG C, and performing constant-temperature reaction for 4.5-5.5 hours; eighthly, cooling to 45-50 DEG C, and discharging. The production method has the advantages that boards or module products can be produced by using the flame-retardant EPS particles produced by the method as the raw material through pre-expansion and forming, good welding performance among the EPS resin particles is achieved, and product fracture and bending load performance and product bending deformation performance can be increased evidently.

Description

technical field [0001] The invention relates to a production method of expandable polystyrene with high fusing performance, which is applied in the technical field of polystyrene production and processing. Background technique [0002] Polystyrene foam is used in the fields of cushioning packaging materials for electronic appliances, vegetable and fruit packaging boxes, and floating products on the sea. EPS particles can be pre-formed and formed to obtain sheet and module products. The fusion bondability between them is poor, and the products made of such EPS particles as raw materials have poor fracture bending load performance and bending deformation performance. Contents of the invention [0003] In order to solve the above-mentioned problems, the present invention discloses a production method of expandable polystyrene with high sinterability, which consists of the following steps: [0004] 1) Add 100 parts of styrene, 0.2--0.4 parts of DCP, 0.5--0.7 parts of flame re...

AI Technical Summary

Problems solved by technology

[0002] Polystyrene foam is used in the fields of cushioning packaging materials for electronic appliances, vegetable and fruit packaging boxes, and floating products on the sea. EPS particles can be pre-formed and formed to obtain sheet and module products. Poor inter-bondability, the products made of such EPS particles have poor fracture bending load performance and bending deformation performance.