Views:250 Author:Site Editor Publish Time: 2020-08-10 Origin:Site
Table of Contents:
High molecular polymer foam material (10 questions)
A gas-solid two-phase composite material composed of polymer and gas molecules. The bubbles may be the dispersed phase, the polymer may be the continuous phase, or both may be the continuous phase. The extruded board is a kind of polymer foam material.
It can be divided into high, medium, and low-density foam materials. It can also be divided into open-cell and closed-cell foam materials. It can also be divided into hard and soft foam materials. It can also be divided into physical foaming, chemical foaming or free foaming, and structural foaming foam materials. It can also be divided into thermoplastic and thermosetting foamed materials.
The most important methods at this stage are extrusion, injection molding, blow molding, and rotational molding. Extrusion production efficiency is high, accounting for the largest proportion. Injection molding focuses on the production of high-density materials. Blow molding and rotational molding account for a relatively small proportion.
|An Important Turning Point in The Development of Polymer Foam Materials|
|Years||Polymer Foam Materials||Inventor|
|1931||PU foam||Munters & Tandberg|
|1937||PS foam||Otto Bayer|
|1941||PE foam||Johnson F L|
|1944||Extruded PS foam||Dow Chemical|
|1945||Hard PU foam||Germany|
|1952||Soft PU foam||Germany|
|1954||Expandable beads||Stastney & Goeth|
|1959||Hard PU foam Products||ICI|
|1962||PS foam injection molding||Rubens|
|1967||Twin screw foaming||Spa L M P|
|1968||Rigid isocyanate foam||ICI|
|1972||Extruded PP foam||Parrish R G|
|1982||Extrusion foaming of storage tank||Collins F|
|1984||PP molded foam products||Japan Styrene Paper|
|1990||Extruded PET foam||Shell|
The extruded board was invented by Dow Chemical in 1944.
The insulation material is a general term for heat preservation material and heat insulation material. Common materials are:
Asbestos and its products
Glass wool and its products
Inorganic bubble insulation material
Aluminum silicate cotton and its products
Mineral wool, rock wool and their products
Inorganic microporous materials
Common compression performance, bending performance, impact performance, and dynamic vibration buffer performance and their relative density follow the square law.
Fast gas exchange; low foaming agent residue; good silencing performance; good adhesion and coating performance; enhanced liquid adsorption and desorption performance.
Disadvantages of openings: lower role performance; lower mechanical properties; poor dimensional stability; poor floating performance; lower energy absorption performance.
The greater the closed-cell rate in the extruded board, the lower the water absorption and thermal conductivity of the board, and the better the heat preservation and long-term heat preservation.
During World War II, polymer foaming technology developed rapidly in Europe and North America. Japan began research in the 1960s, and China began research in the 1970s.
a: open-cell foam
b: closed-cell foam
c: Extrusion of foam plastic at one time, the temperature and pressure of the skin layer and the core are different, so the skin is formed.
d: Foam extruded board of other materials combined up and down
e: Add fibrous foam
f: Use hollow spherical filler to make foam
Feininger (Nanjing) Energy Saving Technology Co., Ltd (shortened as Feininger) is established in the year 2001 and covers an area of 70 acres. Feininger is the first professional manufacturer of XPS Extrusion Line and XPS Foam Board in China. At the same time we are the unique enterprise specializing in XPS Foam as well as developing, manufacturing and selling of XPS extrusion line.