Thermoforming Quarterly is a journal published quarterly by the Thermoforming Division of the Society of Plastics Engineers. The magazine is a great way to keep up with industry trends and developments. SPE Thermoforming Division members receive the magazine by mail four times a year. Non-members can access old issues here via PDF file. If you are not an SPE member this is a great reason to join! Become a member today to start receiving this valuable information in your mailbox.
We welcome objective, technical and related articles that provide valuable information to our community of thermoformers, toolmakers, material suppliers and OEMs. Articles are typically 1500-2000 words. We recommend viewing past articles for further guidance. All submissions should be in MS Word, 12-pt Times New Roman.
Artwork, illustrations, photos and graphics should be 300 dpi. We prefer .eps .jpeg and .pdf files
Deadlines for copy and artwork– 1st Quarter: February 15; 2nd Quarter: May 15; 3rd Quarter: August 1; 4th Quarter: November 15
All submissions can be sent to Conor Carlin, Editor, at email@example.com
Thermoforming Quarterly Sponsorship Sales Contact: Lesley Kyle, +1 914-671-9524 or firstname.lastname@example.org
Third Quarter 2016
In-House Recycling of Polypropylene Films with an Oxygen Scavenger Layer and Their Oxygen Absorption Capacity after Extrusion
Influence of extrusion temperature and multiple extrusions
By Sven Sängerlaub, Daniel Schlemmer & Norbert Rodler, Fraunhofer Institute for Process Engineering and Packaging IVV
Packaging material producers are constantly faced with ever increasing demands for cost reduction and higher sustainability. To reach these goals they are supported by the service offer and expertise of the Fraunhofer Institute for Process Engineering and Packaging IVV as a “external research department” of companies. This article deals with a study which was conducted for an industrial consortium. Fraunhofer IVV did extrusion trials and made films for the consortium as a service on its pilot lines. The films were tested (DSC, MFF, color values, oxygen absorption) and suitable methods were developed and provided to them.
Oxygen scavenger additives, which are blended with polymers, are a commonly established product on the market. The oxygen scavengers protect packaged foods from the reaction with oxygen. An important group are iron based oxygen scavengers. They are a mixture of iron powder and additives, which are dispersed in a polymer matrix. The oxygen scavenger is market available as a masterbatch that is applied as an additive for extrusion. It is often used in combination with polypropylene (PP). The material is extruded to a separate oxygen scavenger layer within a multilayer film structure. Such films are thermoformed to trays. The production scrap is grinded and reused as blend partner for new film extrusion. Such recycling avoids waste, increases the material efficiency and reduces the environmental impact. Not much was known about how iron based oxygen scavengers influence the recyclability of polypropylene. This question was answered in this study.
Innovation Brief: Rim Rolling in Thermoforming
Dexter Mould Technology, Doetinchem, The Netherlands
Rim rolling of thermoformed cups is usually performed in a secondary operation with equipment that is physically located behind the forming and cutting of the cups. To eliminate this secondary stage, dexter Mould Technology has developed a new thermoforming principle to perform the rim rolling action inside the forming mold during the forming cycle. This allows processors to produce rim-rolled cups inside the forming/cutting station of a tilt-mold machine. Each product that is ejected from the cavity is finished and can be stacked and packed. The invention is patented and named as RRIM® – ‘Rim-Rolling-In-Mold’. Due to the nature of the RRIM process, almost any shape (square, oval, triangular) can be produced in addition to standard round products.
RRIM works for all common thermoforming materials such as PP, PET, PLA and PS and does not deform the cup itself. Because the rim rolling is done during the forming cycle, the forming and rim rolling processes are separate and they do not affect one another. The shape of the rim itself can be varied depending on the desired end result.
Full articles appears in print magazine mailed to members.