The multiple of the volume increase after foaming compared to before foaming

It is divided into two types: closed cell type and open cell type.PMI foam'>PMI foam plastic types: PMI foam plastic has two types: hard and soft. Third, semi-rigid (or semi-soft) foam is a foam between the above two types. Usually the foaming ratio is (The multiple of the volume increase after foaming compared to before foaming) is less than 5 is called low foaming, and greater than 5 is called high foaming. Its strength increases with the increase in density, and it has the ability to absorb impact loads. 

PMI foam, core material foam, China CASCELL® HF foam high temperature resistant foam Will PMI foam heating be toxic? The difference and connection between polyurethane core foam and TPU. Flexible foam has excellent elasticity and other properties. It is widely used as heat insulation. Foam plastic is also called porous plastic. The closed cell type The pores are isolated from each other and have floatability; the pores in the open-hole type are connected with each other and have no floatability. Molecular materials have the characteristics of light weight, heat insulation, sound absorption, shock absorption, etc. It is made by mechanical method (air or carbon dioxide is added to foam while mechanical stirring) or chemical method (adding foaming agent). 

Almost all kinds of plastics can be made into foam plastics, and foam molding has become an important part of plastic processing. Foams can also be divided into low foaming and high foaming. The texture is soft at room temperature. First, rigid foam means that at room temperature, the polymer constituting the foam is crystalline or amorphous, and their glass The melting temperature is higher than normal temperature, therefore, the texture of foam is harder at normal temperature. Foam plastic is a type of high foam formed by a large number of gas micropores dispersed in solid plastics. Plastic made of resin as the main raw material with numerous micropores inside. 

Sound insulation, packaging materials and car and ship shells, etc. Field. Second, the melting point of soft foam, that is, the polymer that constitutes the foam, is lower than normal temperature or the glass transition temperature of amorphous polymer is lower than normal temperature. It can be made of polystyrene, polyvinyl chloride, polyurethane and other resins. Compared with pure plastic, PMI foam has low density, light weight, and high specific strength. It can be divided into soft and hard.; (6) Convenient molding and processing, and can be made by molding, extrusion, injection and other molding methods It can be formed into various foam pads, foam blocks, sheets, etc. It is easy to carry out secondary molding processing, for example, foam sheets can be thermoformed into various fast food containers, etc. Buffer and shock absorption performance, sound insulation and sound absorption performance, low thermal conductivity, good heat insulation performance, excellent electrical insulation performance, corrosion resistance, mold resistance performance.

It can be used as heat insulation and sound insulation materials and has a wide range of uses : The bulk density is very low, which can reduce the weight of the packaging and reduce the transportation cost; (2) It has excellent shock and vibration energy absorption, and it can greatly reduce the damage of the product when used for cushioning and shockproof packaging; (3) Temperature and humidity It has strong adaptability to changes and can meet the requirements of general packaging conditions; (4) Low water absorption, low moisture absorption, good chemical stability, it will not corrode the contents, and is strong against acids, alkalis and other chemicals (5) Low thermal conductivity, can be used for thermal insulation packaging, such as ice cream cups, fast food containers and thermal insulation fish boxes, etc. In addition, foam blocks can also be self-bonded with adhesives Or bonding with other materials to make various cushioning pads, etc., and their dielectric properties are better than matrix resins, and have a wide range of uses. There are many tiny pores inside Plastic. It is lightweight, heat-insulating, sound-absorbing, shock-proof, and corrosion-resistant