Hard Foam Board can be used as thermal insulation material, interlayer material, packaging material, sound and shockproof material, building material, etc. Next, let's take a look at the performance characteristics and foaming methods of Hard Foam Board.

Here is the content list:

• Performance characteristics

• Chemical foaming method

Performance characteristics

(1) Hard Foam Board has a very low bulk density, which can reduce packaging weight and transportation costs;

(2) Hard Foam Board has excellent shock and vibration energy absorption, which can greatly reduce product damage when used for buffering and shock-proof packaging;

(3) Hard Foam Board has strong adaptability to changes in temperature and humidity, and can meet the requirements of general packaging conditions;

(4) Low water absorption, low hygroscopicity, good chemical stability, will not corrode the contents, and have strong resistance to chemicals such as acid and alkali;

(5) Hard Foam Board has low thermal conductivity and can be used for thermal insulation packaging, such as ice cream cups, fast food containers, and thermal insulation fish boxes;

(6) Hard Foam Board is easy to form and process and can be made into various foam pads, foam blocks, sheets, etc. by molding, extrusion, injection, and other molding methods.

Chemical foaming method

①     Adopt chemical foaming agent

Commonly used chemical foaming agents, such as azodicarbonamide, sodium bicarbonate, etc. Many thermoplastics can be made into Hard Foam Boards by this method. For example, polyvinyl chloride foam shoes are made of resins, plasticizers, foaming agents, and other additives, and put into an injection molding machine. The foaming agent is decomposed in the barrel, and the material is foamed in the mold. Foam artificial leather is to mix the foaming agent into the PVC paste, smear, or calendar on the fabric, and continuously passes through the tunnel heating furnace. Get foam artificial leather. The rigid PVC low-foaming sheet, pipe, or profile is formed by extrusion. The foaming agent is decomposed in the barrel. When the material leaves the machine head, the pressure drops to normal pressure, and the gas is dissolved to expand and foam. When the foaming process and the cooling and setting process are properly coordinated, structural foam products can be obtained.

②    Using the by-product gas in the polymerization process

When isocyanate and polyester or polyether undergo a polycondensation reaction, some isocyanates will react with water, hydroxyl, or carboxyl groups to generate carbon dioxide. As long as the gas evolution rate and the polycondensation reaction rate are properly adjusted, a highly foamed product with very uniform cells can be produced. There are two types of Hard Foam Boards. The soft open-cell type is like a sponge and is widely used as seat cushions for various seats and sofas, as well as sound-absorbing and filtering materials. The hard closed-cell type is ideal for heat preservation, insulation, and shock absorption and floating material.

The above is about the performance characteristics and foaming methods of Hard Foam Board. If you are interested in the Rigid Foam Board and Hard Foam Board, you can contact us. Our website is https://www.hzpvcboard.com/.