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Macro Adds Individual Layer Foaming Option to Blown Film Coextrusion Lines




Film and sheet extrusion systems supplier Macro Engineering & Technology Inc. (Canada) has added the option of individual layer gas foaming to its barrier blown film coextrusion lines.


Macro’s blown film coextrusion systems are used to produce high barrier films up to 11-layers and up to 3 m wide using a variety of materials including PA, EVOH and PVdC. The films produced are most typically used in food and medical packaging applications. The individual layer foaming option allows processors to create a wider range of products by manipulating different foamed layer combinations within the coextruded film structures.


Foaming can reduce weight, leading to raw material savings and can also create favourable properties in the film, such as improving thermal and sound insulation, and opacity can be obtained without using fillers.


Earlier this year, Macro announced the addition of individual layer foaming technology to its cast barrier film lines along with news of a 7-layer cast line installation in Europe that produces high barrier films with layer foaming in two of the seven layers.

Similar to the cast technology, the blown system features individual layer foaming that is achieved with nitrogen gas injection through a proprietary feedblock. The configuration of the line allows it to be operated with or without foam injection, allowing the film producer to easily switch between foamed films and conventional multilayer film production without changing machinery.


The addition of individual layer foaming to Macro’s blown film coextrusion systems broadens the possibilities of end-use applications by producing barrier films that are stiffer and thicker without increasing materials costs. The rigidity of the foamed films makes them suitable for stand up pouches and thermoformed trays.


Macro is currently building a 9-layer blown film line with individual layer foam technology that will be delivered to an undisclosed film manufacturer in Europe. The line will produce high barrier films and can foam individual layers or several layers together, depending on the application.


For more information, please contact us.


Learn more about Macro's barrier blown film coextrusion lines.


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About Macro 

Macro Engineering & Technology is a global supplier of film and sheet extrusion systems that specializes in barrier film lines and custom engineered extrusion systems. Founded in 1978, Macro’s approach is to help film and sheet producers reach their production goals through a project-oriented philosophy and an uncompromising commitment to developing innovative technologies. 


Macro manufactures blown, cast and biaxially-oriented coextrusion lines for multilayer films up to 13-layers. The company also supplies sheet extrusion lines for specialty applications, along with extrusion coating and laminating lines. Macro also specializes in developing customized winding solutions and supplies winding equipment to meet the needs of complex requirements. 

Macro’s equipment is used throughout the world to manufacture value-added products in the food packaging, medical, and industrial markets. 


For more information about Macro Engineering & Technology Inc. contact us.