Welding methods for joining thermoplastic polymers for the hermetic enclosure of medical devices

Amanat, Negin; James, Natalie L.; McKenzie, David R.

doi:10.1016/j.medengphy.2010.04.011

Cited by 171 publications

(103 citation statements)

References 99 publications

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“…For example, the system can be used for additive manufacturing of vehicle heat recovery ventilators for the automotive industry [36], industrial heat exchangers [6,37], heat exchangers for solar water pasteurization [38], hermetic thermoplastic medical device encapsulation [39], bio-microfluidic channels in transparent polymer materials [40], and consumer goods packaging [41]. The polymer laser welder described is ideal for rapid prototyping.…”

Section: Discussionmentioning

confidence: 99%

Open Source Laser Polymer Welding System: Design and Characterization of Linear Low-Density Polyethylene Multilayer Welds

et al. 2016

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Abstract:The use of lasers to weld polymer sheets provides a means of highly-adaptive and custom additive manufacturing for a wide array of industrial, medical, and end user/consumer applications. This paper provides an open source design for a laser polymer welding system, which can be fabricated with low-cost fused filament fabrication and off-the-shelf mechanical and electrical parts. The system is controlled with free and open source software and firmware. The operation of the machine is validated and the performance of the system is quantified for the mechanical properties (peak load) and weld width of linear low density polyethylene (LLDPE) lap welds manufactured with the system as a function of linear energy density. The results provide incident laser power and machine parameters that enable both dual (two layers) and multilayer (three layers while welding only two sheets) polymer welded systems. The application of these parameter sets provides users of the open source laser polymer welder with the fundamental requirements to produce mechanically stable LLDPE multi-layer welded products, such as heat exchangers.

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Section: Discussionmentioning

confidence: 99%

Open Source Laser Polymer Welding System: Design and Characterization of Linear Low-Density Polyethylene Multilayer Welds

et al. 2016

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“…).With use of polymers has resulted in remarkable cost efficiency increases for the industries. Besides production cost, polymeric materials present many advantages such as weight saving, flexibility and thermal insulation [1][2][3][4]. Also, in the aerospace and automotive industries, the use of polymers and polymer matrix composites [3] has recently increased for fuel efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…Also, in the aerospace and automotive industries, the use of polymers and polymer matrix composites [3] has recently increased for fuel efficiency. For other consumer products, such as mobile phones [1], various electrical devices [4], computers, building and household appliances [3], the rapid spreading of polymer materials has provided many advantages [1,2,6]. …”

Section: Introductionmentioning

confidence: 99%

The Effects Of Critical Welding Parameters On Tensile-Shear Properties Of Friction Stir Spot Welded Polyethylene

Çevik¹,

Gülenç²,

Durgutlu³

2017

Journal of Polytechnic

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Bu makaleye şu şekilde atıfta bulunabilirsiniz(To cite to this article): Çevik B., Gülenç B. and Durgutlu A., "The effects of critical welding parameters on tensile-shear properties of friction stir spot welded polyethylene", Politeknik Dergisi, 20(4): 945-951, (2017). Politeknik Dergisi, 2017; 20 (4) : 945-951 Journal of Polytechnic, 2017; 20 (4) ABSTRACTThe aim of this study was to investigate the weldability of high density polyethylene via friction stir spot welding method. Polyethylene sheets were joined with dwell times of 60 to 100 s, three different pin profiles (M6×1, M6×1.25, M6×1.5) and pin lengths of 3.75 to 4.75 mm by using rotational speed of 900 rpm and delay time of 45 s. During welding processes, the temperatures were measured under the welding centers. The tensile-shear tests were performed to welded samples. Also, macrostructures of welding nuggets were examined. The small welding nuggets were formed by using the lower dwell time. The melting in welding nugget occurred in the all dwell times during the welding. The dwell time affected on the friction temperature. The key (pin) hole closed when sufficient friction temperature (dwell times of 80 and 100 s). The pin profiles directly affected the welding quality. Large screw pitch range of the pin and the small pin length from 4.5 mm negatively affected the weld fracture load. Pin length of the stirring tool directly affected the quality of welding.Keywords: FSSW, polyethylene, welding parameters, tensile-shear properties. ÖZBu çalışmanın amacı, sürtünme karıştırma nokta kaynak yöntemi ile yüksek yoğunluklu polietilen malzemelerin kaynaklanabilirliğini araştırmaktır. Polietilen levhalar, 900 dev/dak devir sayısı ve 45 s bekleme süresi kullanılarak, 60-100 s karıştırma süresi, üç farklı pim profile (M6×1, M6×1.25, M6×1.5) ve 3.75-4.75 mm pim uzunluklarında birleştirilmiştir. Kaynak işlemi esnasında kaynak merkezinin altından sıcaklık ölçümleri yapılmıştır. Kaynaklı numunelere çekmek-kayma testleri uygulanmıştır. Ayrıca kaynak çekirdeklerinin makro görüntüleri incelenmiştir. Düşük karıştırma süreleri kullanıldığında küçük kaynak çekirdekleri oluşmuştur. Tüm karıştırma sürelerinde kaynak çekirdeğinde ergime meydana gelmiştir. Karıştırma süresi sürtünme sıcaklığına etki etmiştir. Yeterli sürtünme sıcaklığı (80 ve 100 s) oluştuğunda kaynak çekirdeğindeki anahtar (pim) değili kapanmıştır. Pim profili kaynak kalitesine doğrudan etki etmiştir. Büyük adımlı vidalı olan pim ve 4.5 mm'den küçük pim boyları kaynak kopma mukavemetini olumsuz etkilemiştir. Karıştırıcı takımın pim boyunun kaynak kalitesine doğrudan etki ettiği belirlenmiştir.Anahtar Kelimeler: SKNK, polietilen, kaynak parametreleri, çekme-kayma özellikleri.

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“…Laser transmission welding of polymeric materials is in widespread use in many industries including automobile manufacture and food and medical packaging [13]. It involves localized heating at the interface of the two materials to be joined, one of which must be optically transparent to the laser beam and the other highly absorbent.…”

Section: Introductionmentioning

confidence: 99%

Non-contact laser sealing of thin polyester food packaging films

Brown

Kerr

Parkin

et al. 2012

Optics and Lasers in Engineering

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We describe a laser-based, non-contact sealing technique for thin, polyester-based lidding films, used in PET containers for food packaging. The method uses a beam-steered laser to seal the container, thereby enabling virtually instant changeover from one product line to another. Unlike conventional sealing PET film processes, no bespoke tooling is required to hold the package components in close proximity and under pressure whilst the seal is formed.This greatly reduces sealing machine tooling costs and potential downtime at product changeovers. Results are presented that show that the process is able to produce seals of higher strength using thin (26µm) polyester film than those from the conventional thermal/mechanical process. This provides a potential for increased production flexibility, reduction in product wastage, and for reducing the cost and embodied energy in construction of a less massive sealing machine.

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Welding methods for joining thermoplastic polymers for the hermetic enclosure of medical devices

Cited by 171 publications

References 99 publications

Open Source Laser Polymer Welding System: Design and Characterization of Linear Low-Density Polyethylene Multilayer Welds

Open Source Laser Polymer Welding System: Design and Characterization of Linear Low-Density Polyethylene Multilayer Welds

The Effects Of Critical Welding Parameters On Tensile-Shear Properties Of Friction Stir Spot Welded Polyethylene

Non-contact laser sealing of thin polyester food packaging films

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