Difference between EPP & EPS foam

EPP is different from EPS. EPS cost is less, will break easily, but have good protecting features. EPP foam cost is higher, The biggest feature of EPP foam is its super toughness and continuous folding. In addition to the new environmentally friendly packaging materials. EPP foam is composed of countless independent bubbles produced by physical foaming of low-density polyethylene fat. The cushioning performance is average. Also known as polyvinyl acetate. It is a polymer of vinyl acetate. The English abbreviation is polyvinyl chloride. The polymer is made of vinyl acetate. EPP foam is an amorphous polymer with a transparent appearance and is soluble in benzene, acetone and chloroform. 

EPP materials have many advantages and characteristics, so they are also widely used in several industries. Let's talk about the organic chemical structure type of EPP materials and the advantages of EPP materials over ordinary plastic foams.

When we study organic chemistry, we all know that based on the analysis of the chemical structure of certain objects, we can understand whether its characteristics are stable and whether it is easy to produce chemical reactions.

Let's talk about the organic chemical structure type of EPP materials.

Scientific research on the organic chemical structure type of EPP packaging materials (polyurethane foam polypropylene):

According to DSC detection (heating rate of 5℃/min), the melting point of PP used in this laboratory is 169.94℃. The base above the carbon chain of the PP molecular structure will make the uncle oxygen atom active, endangering the organic chemical properties of PP. For example, it is more sensitive to oxygen, more unstable, and heat and radiation sources cause the PP chain to break instead of chemical cross-linking. The C-H bond on the uncle oxygen atom is a weak bond. When the medium and short-wave ultraviolet rays in the R light affect it, it is easy to produce unstable dispersed bases with electronic devices. The destructive kinetic energy of this dispersed base is high. The chain reaction of the biomacromolecule chain shrinkage is carried out strongly, resulting in severe dissolution of PP and deterioration of properties. PP without light stabilizer becomes brittle after 12 days of exposure and moldy after being placed in the room for 4 months. Similarly, similar thermal dissolution and air oxidation dissolution will occur under the standard of high temperature aerobic exercise or gas presence. At this time, the EPP foam dissolves and transforms into low-content substances, reducing the melt viscosity of the raw materials and reducing the compressive strength of the structure.

In summary, eps and epp foam material have following three differences:

1.different component。

EPS foam: also known as polystyrene foam, is a lightweight polymer.

EPP foam: also known as expanded polypropylene foam, is the abbreviation of a new type of foam.

2.Different applied industry

EPS foam: used in packaging industry and exterior wall insulation industry。

EPP foam: used in the automotive and packaging industries.

3.different characteristics:

EPS foam: It has the characteristics of light weight, heat insulation, sound absorption, shock absorption, etc.

EPP foam: EPP foam has light proportion, good elasticity, strong anti-seismic and anti-compression ability, high deformation recovery rate, good absorption performance, oil resistance, acid resistance, alkali resistance, resistance to various chemical solvents, non-absorbent, insulation, and heat resistance.