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Device and process for preparation of melamine formaldehyde foam

A technology of melamine formaldehyde and melamine, which is used in household components, household appliances, other household appliances, etc., can solve the problems of large reaction heat, difficult to realize industrialized continuous reaction, and high viscosity of melamine formaldehyde reaction system, and can control the reaction time. Effect

Inactive Publication Date: 2015-02-04
TIANHUA INST OF CHEM MACHINERY & AUTOMATION
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  • Abstract
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Problems solved by technology

[0003] However, the viscosity of the melamine-formaldehyde reaction system is high, the heat of reaction is large, and the required reaction time is short, so it is difficult to realize industrial continuous reaction.

Method used

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  • Device and process for preparation of melamine formaldehyde foam

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Embodiment Construction

[0016] The present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present invention.

[0017] like figure 1 The shown device for preparing melamine formaldehyde foam includes two melamine reaction kettles 1, a single-screw extruder 2, a metering feeder 3, a reactive twin-screw extruder 4, a sheet head 5, a microwave generator Bubble device 6, melamine reactor 1 effective volume 1 m 3 ; single screw extruder 2 screw diameter 120mm; melamine reaction kettle (2 units) 1 connected in parallel with single screw extruder 2, and connected with metering feeder 3 through a hopper, the screw diameter of metering feeder 3 is 65 mm; the metering feeder 3 is connected to the reactive twin-screw extruder 4 with the motor, gear box, frame and body as a whole. Reaction type twin-screw extruder 4 has a screw diameter ...

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Abstract

The invention discloses a device and process for preparation of melamine formaldehyde foam, the device comprises melamine reactors, a single screw extruder, a metering feeder, a reaction type twin-screw extruder, a sheet machine head and a microwave foaming device, which are connected in sequence, the number of the melamine reactors is two, and the melamine reactors are arranged in parallel. The device can effectively and timely remove a large amount of heat of reaction when melamine and formaldehyde react, so that the reaction is performed in a smooth and controlled manner, and a melamine formaldehyde foam product with stable quality can be continuously produced.

Description

technical field [0001] The invention relates to the technical fields of reactive extrusion technology and plastic foaming, in particular to a device and a process for preparing melamine formaldehyde foam. Background technique [0002] Melamine is a basic organic chemical intermediate product with a wide range of uses. After mixing melamine and formaldehyde, it can be made into melamine formaldehyde foam through foaming reaction. This foam is non-flammable, water-resistant, heat-resistant, aging-resistant, arc-resistant, chemical-resistant, has good insulation properties, gloss and mechanical strength, and at the same time It also has excellent sound-absorbing effect. Therefore, it is widely used in sound absorption and flame retardant in buildings, automobiles and even aircraft carriers, submarines, etc. [0003] However, the melamine-formaldehyde reaction system has high viscosity, large reaction heat, and requires short reaction time, which makes it difficult to realize ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C69/02B29C47/40B29L31/60
Inventor 张国强龚少立何振鹏师燕燕曾天忠彭涛俞长庚马永金王英
Owner TIANHUA INST OF CHEM MACHINERY & AUTOMATION
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