CN112549572A

CN112549572A - Novel XPS (extruded polystyrene) heat insulation board and preparation process thereof

Info

Publication number: CN112549572A
Application number: CN202011317956.6A
Authority: CN
Inventors: 周祥
Original assignee: Taichunneng New Materials Suzhou Co ltd
Current assignee: Taichunneng New Materials Suzhou Co ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-03-26

Abstract

A novel XPS extrusion molding insulation board and a preparation process thereof comprise the following steps: (1) keeping flushing cold water at the packing position, and heating the furnace body; (2) adding raw materials of polystyrene resin, auxiliary foaming agent, other products, a gain material and catalyst carbon dioxide, keeping heating to over 180 ℃, and keeping the temperature of a machine head at 160 ℃; (3) the inside is electrified, the current and the temperature are detected until no sound is produced when the inside is electrified, and the device adjusts the inside air pressure to 10 kPa; (4) slowly spraying and cooling; (5) extruding the plate into a forming machine, and drawing the plate twice to a proper thickness; (6) cutting by secondary traction; (7) embossing and napping are carried out according to actual production requirements; the novel XPS extrusion molding insulation board and the extrusion molding board manufactured by the preparation process of the novel XPS extrusion molding insulation board are extremely low in water absorption, good in pressure resistance and ageing resistance, clear in structure and higher in yield compared with a common extruding machine.

Description

Novel XPS (extruded polystyrene) heat insulation board and preparation process thereof

Technical Field

The invention belongs to the field of extruded sheet production, and particularly relates to a novel XPS extruded insulation board and a preparation process thereof.

Background

XPS extruded sheet full-name extrusion molding polystyrene foam is with polystyrene resin as raw materials plus other raw and auxiliary materials and polymer, injects the catalyst simultaneously through heating mixing, then extrusion molding extrusion moulding and the rigid foam board of manufacturing, XPS has perfect closed cell honeycomb structure, and its advantage compared in other foam still includes:

1. excellent heat insulating property

The foamed polyurethane heat insulation material has the characteristics of high thermal resistance, low linearity and low expansion ratio, the closed pore rate of the structure reaches more than 99%, a vacuum layer is formed, air flow heat dissipation is avoided, the heat insulation performance is ensured to be lasting and stable, and the foamed polyurethane heat insulation material has the advantages of being superior to the foamed polyurethane 80% closed pore rate. Practice proves that the XPS extruded insulation board with the thickness of 20mm has the insulation effect equivalent to foamed polystyrene with the thickness of 50mm and cement perlite with the thickness of 120 mm. Therefore, the material is the best choice for building heat preservation at present;

2. excellent high-strength compression resistance

Due to the special structure of the XPS plate, the XPS plate has extremely high compressive strength and extremely high impact resistance, can bear the ground load of each system when the compressive strength reaches more than 150-700 Kpa according to different models and thicknesses of the XPS, and is widely applied to the fields of geothermal engineering, highways, airport runways, square grounds, large-scale cold storages, interior decoration and heat preservation of vehicles and the like;

3. high hydrophobic and moisture-proof performance

The water absorption rate is an important parameter for measuring the thermal insulation material. The heat insulation material absorbs water, then the heat insulation performance is reduced, and the absorbed water is easy to freeze at low temperature, so that the structure of the heat insulation material is damaged, and the compression resistance and the heat insulation performance of the plate are reduced. Because the polystyrene molecular structure does not absorb water, the plate molecular structure is stable and gapless, and the problems of water leakage, permeation, frosting, condensation and the like of other materials are solved;

4. light weight and convenient use

The XPS board has a completely closed-cell foaming chemical structure and a cellular physical structure, so that the XPS board has the characteristics of light weight and high strength, is convenient to cut and transport, is not easy to damage and is convenient to install;

5. good stability and corrosion resistance

The XPS extrusion molding insulation board is not aged, not decomposed and not generating harmful substances after being used for a long time, has extremely stable chemical properties, can not be degraded due to water absorption, corrosion and the like, so that the performance of the XPS extrusion molding insulation board is reduced, and can still keep excellent performance under a high-temperature environment, and according to the introduction of related information, the XPS extrusion molding insulation board produced by domestic factories can still keep the service life of about 60 years, can not be decomposed or mildewed, and has no volatilization of toxic substances;

6. environmental protection performance of products

The environmental protection performance of the XPS plate mainly depends on a foaming agent, most of domestic manufacturers use CO2 as a catalyst at present, but part of manufacturers use Freon all the time, the chemical performance is stable through detection of relevant national departments, harmful substances are not volatilized, the XPS plate is harmless to human bodies, production raw materials are environment-friendly materials, and no industrial pollution is generated. The product belongs to an environment-friendly building material.

The Chinese patent application No. CN201710458226.X discloses an opaque XPS extruded sheet, which is prepared by a proper proportion of polystyrene, a nucleating agent, calcium stearate and blue masterbatch to form an extruded sheet with strong light-blocking capability, but compared with the traditional XPS extruded sheet, the method only limits the selection of the nucleating agent and a foaming agent, and appoints a single-color masterbatch to be the blue masterbatch, so that the preparation method and related equipment are lacked, the setting of the preparation raw materials is limited, the production cost is high, and the method is not suitable for large-scale production of enterprises.

Disclosure of Invention

In order to overcome the defects, the invention aims to provide the novel XPS extrusion molding insulation board and the preparation process thereof, wherein the raw materials are easy to obtain, are beneficial to garbage recovery and meet the requirement of environmental protection; on the other hand, the board body prepared after full foaming has better toughness and smooth surface, and can greatly improve the product quality;

the invention comprises the following contents:

a novel XPS extrusion molding insulation board and a preparation process thereof are characterized by comprising the following steps:

(1) heating and preheating: fixing polystyrene resin or white foam in the mesh; keeping flushing cold water to the packing, and keeping the packing at a low temperature; preheating an extruder to 170 ℃ and keeping the temperature of a machine head at 160 ℃;

(2) feeding: feeding polystyrene resin and color master batch from a hopper, fully mixing and heating to over 180 ℃, and simultaneously keeping the temperature of a machine head unchanged;

(3) electrolytic melting: introducing 20A current into the extrusion molding cavity, and adjusting according to the internal actual condition; no internal noise is required; if the inside still has the abnormal sound, continue to heat up the extrusion molding cavity inside; adjusting the internal air pressure to 10 kPa;

(4) and (3) spraying and cooling: adding enough foaming agent into the extrusion molding cavity 6, stirring the inside of the extrusion molding cavity for acceleration, keeping the internal air pressure at 10kPa, and turning off a motor to stop heating; spraying and cooling the plastic extrusion cavity, and keeping slow spraying to prevent sudden increase of current; wherein, when the foaming agent is put into the foaming agent, more foaming agent residues are remained after the foaming agent is fully stirred so as to ensure full foaming;

(5) extruding: after fully cooling to a fluid state, slowly extruding the mixture to a prepared tray by an extrusion molding pipe;

(6) traction: extruding the fluid semi-finished product into a forming machine, adjusting the thickness of the product through primary traction, adjusting the area of the plate through secondary traction, and standing and cooling to a solid state;

(7) embossing and napping: and embossing and napping the solid semi-finished product according to the actual production requirement of a manufacturer.

Further, the volume ratio of the polystyrene resin to other waste products used as raw materials, including white foam, plastic plates and the like, is 3: 1.

as a preferred choice of the invention, the white foam can be from a cake box bottom cushion, the plastic plate can be from a packaging appliance and the like, the source is wide, the waste utilization can be realized, the environment-friendly production principle is met, the raw material forming speed obtained by mixing the white foam with polystyrene resin is higher, the surface filling of the finished product is fuller, and no pits and the like are generated.

Further, the hopper is sprayed with aerogel and fixed seal circle with extrusion molding chamber junction.

Preferably, the present invention can effectively prevent leakage during injection, and can prevent internal heat leakage and reduce energy waste when melting is performed after the injection is completed.

Furthermore, in the electrolytic melting process, the temperature in the extrusion molding cavity is fully raised, and then the internal air pressure is adjusted.

As a preferable aspect of the present invention, the device is prevented from being damaged by collision of the internal gas due to heating after the internal gas pressure is adjusted to be stable.

Further, the length of each color master batch is 3-4 cm.

As a preference of the present invention, the color concentrate dissolution temperature is about 160 ℃, while the internal heating temperature is typically about 200 ℃, allowing complete dissolution of the color concentrate; smaller color concentrates are more inconvenient to process; because raw materials are processed in a pipeline mode, the residence time of each part is short, the color master batch can be incompletely dissolved due to too long color master batch, the raw materials can be wasted, and hard foreign matters exist in finished products due to undissolved parts, so that the product quality is influenced.

Further, the traction process is as follows:

(1) primary traction: cutting the extruded plasticized material to a required thickness;

(2) and (3) secondary traction: cutting the extruded plasticized material to a proper size;

(3) fine cutting: and (5) finishing the appearance of the plate according to the required requirements.

Preferably, the drawing is more effective in cutting a plasticized material solidified by a high-temperature liquid, and more accurate limitation can be made on the specification of the sheet material.

Further, the embossing and napping process comprises the following steps:

(1) coating a layer of embossing silica gel on the cloth, pressing and fixing the embossing silica gel by using a top and bottom die, and pressing and ironing the embossing silica gel by using a hot press;

(2) in order to avoid the discomfort of a producer in the production process, the producer should use sticky cloth to cover and fold when pressing;

(3) the surface of the heat preservation plate is coated by a roller with a napping roller to generate three-dimensional sense.

As a preference of the present invention, it is advantageous to improve the visual effect of the present invention.

Compared with the prior art, the invention has the following beneficial effects:

the novel XPS extrusion molding insulation board and the preparation process thereof are simple and have strong operability, and the polystyrene resin and part of plastic waste are adopted, so that the waste can be recycled and reused, and the environmental protection requirement is met;

according to the novel XPS extrusion molding insulation board and the preparation process thereof, the melting link is more sufficient, the flatness of the product can be effectively improved, the surface of the product is smooth, and the subsequent galling treatment is facilitated;

according to the novel XPS extrusion molding insulation board and the preparation process thereof, pressure maintaining treatment is performed during spraying, so that the phenomenon that the board body is too brittle and the product quality is influenced due to the fact that the internal air pressure suddenly drops when the board body is sprayed after melting can be prevented;

the novel XPS extrusion molding insulation board and the preparation process thereof have the advantages that the embossing process is more humanized, and discomfort of production personnel in template rolling can be prevented.

Drawings

FIG. 1 is a schematic diagram of the structure of the novel XPS extruded insulation board and the preparation process thereof;

in the figure: motor cabinet 1, motor 2, pan feeding governing valve 3, hopper 4, extrusion molding pipe 5, extrusion molding chamber 6, fan 7, electric heater 81, mesh 82, packing 83.

Detailed Description

In the following, fig. 1 is described in detail with reference to specific embodiments of the invention, and it is obvious that the described embodiments are only a part of the embodiments of the invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The following examples 1 and 2 provide a method for preparing an easily-formed ultra-thin insulated magnet wire for a high-power generator,

example 1

A novel XPS extrusion molding insulation board and a preparation process thereof comprise the following steps:

(1) heating and preheating: fixing polystyrene resin or white foam in the mesh 82; cold water is kept to be flushed into the packing 83, and the packing is kept at a low temperature; preheating an extruder to 170 ℃ and keeping the temperature of a machine head at 160 ℃;

(2) feeding: the polystyrene resin and the color master batch are put into the hopper 4, fully mixed and heated to over 180 ℃, and meanwhile, the temperature of the machine head is kept unchanged;

(3) electrolytic melting: 20A current is introduced into the extrusion molding cavity 6, and the adjustment is carried out according to the internal actual condition; no internal noise is required; if the inside still has the abnormal sound, the temperature of the inside of the extrusion molding cavity 6 is continuously increased; adjusting the internal air pressure to 10 kPa;

(4) and (3) spraying and cooling: adding enough foaming agent into the extrusion molding cavity 6, stirring the inside of the extrusion molding cavity for acceleration, keeping the internal air pressure at 10kPa, and turning off the motor 2 to stop heating; spraying and cooling the plastic extrusion cavity 6, and keeping slow spraying to prevent sudden increase of current; wherein, when the foaming agent is put into the foaming agent, more foaming agent residues are remained after the foaming agent is fully stirred so as to ensure full foaming;

(5) extruding: after fully cooling to a fluid state, slowly extruding the mixture to a prepared tray by an extrusion pipe 5;

Example 2

Preferably, the volume ratio of the polystyrene resin to other waste products used as raw materials, including white foam, plastic plates and the like, is 3: 1.

preferably, the joint of the hopper 4 and the extrusion molding cavity 6 is sprayed with aerogel and fixed with a sealing ring.

Preferably, during the electrolytic melting process, the temperature in the extrusion cavity 6 should be sufficiently raised, and then the internal air pressure should be adjusted.

Preferably, the length of each color masterbatch is 3-4 cm.

Preferably, the traction process is as follows:

Preferably, the embossing and napping process is as follows:

The invention has many applications, and the above description is only a preferred embodiment of the invention. It should be noted that the above examples are only for illustrating the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications can be made without departing from the principles of the invention and these modifications are to be considered within the scope of the invention.

Claims

1. A novel XPS extrusion molding insulation board and a preparation process thereof are characterized by comprising the following steps:

(1) heating and preheating: fixing polystyrene resin or white foam in the mesh (82); cold water is kept to be flushed into the packing (83) to keep the packing at a low temperature; preheating an extruder to 170 ℃ and keeping the temperature of a machine head at 160 ℃;

(2) feeding: polystyrene resin and color master batch are put into the hopper (4), fully mixed and heated to over 180 ℃, and meanwhile, the temperature of the machine head is kept unchanged;

(3) electrolytic melting: 20A current is introduced into the extrusion molding cavity (6), and the adjustment is carried out according to the internal actual condition; no internal noise is required; if the inside has abnormal sound, the temperature inside the extrusion molding cavity (6) is continuously increased; adjusting the internal air pressure to 10 kPa;

(4) and (3) spraying and cooling: adding enough foaming agent into the extrusion molding cavity 6, stirring the inside of the extrusion molding cavity for acceleration, keeping the internal air pressure at 10kPa, and turning off the motor (2) to stop heating; spraying and cooling the extruded plastic cavity (6), and keeping slow spraying to prevent sudden increase of current; wherein, when the foaming agent is put into the foaming agent, more foaming agent residues are remained after the foaming agent is fully stirred so as to ensure full foaming;

(5) extruding: after fully cooling to a fluid state, slowly extruding the mixture to a prepared tray by an extrusion pipe (5);

2. A novel XPS extruded insulation board and process of manufacture according to claim 1, wherein the volume ratio of polystyrene resin to other waste products used as raw materials, including white foam, plastic boards, etc. is 3: 1.

3. a novel XPS extruded insulation board and process of manufacture according to claim 1 wherein the hopper (4) and extrusion cavity (6) junction is sprayed with aerogel and secured sealing ring.

4. A novel XPS extruded insulation board and process according to claim 1 wherein the internal pressure is adjusted after the temperature in the extrusion chamber (6) has been sufficiently raised during the electrolytic melting process.

5. The novel XPS extruded insulation board and process of manufacture of claim 1 wherein each colour masterbatch is 3-4cm in length.

6. The novel XPS extruded insulation board and the process for making the same as claimed in claim 1, wherein the draw process is as follows:

7. The novel XPS extruded insulation board and the process for making the same as claimed in claim 1, wherein the embossing and roughening process is as follows: