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HIGHLIGHTED PRODUCTS
 
HOME PAGE » PRODUCTS » ADDITIVES » EXPANDING AGENTS

EXPANDING AGENTS

Their purpose is to lighten the molded parts and/or reduce the density of the extruded product.
Density is the ratio between mass and volume; keeping volume constant, the higher the density, the greater the weight of the manufactured product.
In this case, expanding additives help keep density low with the aim of obtaining lighter finished products.

Expanding additives improve effects such as sink marks and voids in moldings.
When a mold is not completely filled, local depressions and/or internal empty bubbles may form, and result in final products that appear to have been “hollowed out.”
To solve problems of this kind, we use expanding additives that release gas inside the mold in order to compress the molten material homogeneously, thereby facilitating the thorough filling of the mold.
Using such masters reduces the mechanical characteristics of the manufactured product.

Possible processing problems
Incorrect temperature management can lead to a reflux of material during the extrusion or molding, with the possible formation of gas.
In this case, percentage and temperature settings must be calibrated for the machine and the process involved.

PRODUCT LIST
Code Commercial description Support base Compatibility Application Goods sectors
1009002 Rifrachem PE Expor AZ/B5
Specific product for applications in EVA, footwear sector. Lowers density and lightens part weight. It produces a foam effect. Ignition temperature exceeding 100° C.
LDPE 
EVA, LDPE, LLDPE, PP Copo, PP Omo Foam extrusion, Injection Molding Clothing and Fashion, Sports equipment, Toys
1009004 Rifrachem PE Expor AZ/40
Ideal product for polyolefin, to be used when a "foam" effect is required. Lowers density and lightens part weight. Ignition temperature exceeding 200° C / 210° C
LDPE 
HDPE, LDPE, LLDPE, PP Copo, PP Omo Foam extrusion, Injection Molding Automotive, Clothing and Fashion, Construction, Furnishings , Sports equipment, Toys
1009006 Rifrachem PS Expor AZ/40
Specific product for PS, to be used when a "foam" effect is required. Lowers density and lightens part weight. Ignition temperature exceeding 200° C / 210° C.
PS 
ABS, PS, PSA, PSC, SAN Foam extrusion, Injection Molding Automotive, Construction, Furnishings
1009801 Rifrachem PE Expor APF/D 004
Product for use in polyolefin, ideal to solve problems of shrinkage. Endothermic expanding agent with good nucleating action. Ignition temperature exceeding 180° C.
LDPE 
HDPE, LDPE, LLDPE, PP Copo, PP Omo Cast film extrusion, Foam extrusion, Injection Molding Electrical/Electronic , Furnishings , Home appliances, Household products
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