{"id":1110,"date":"2026-08-04T06:21:10","date_gmt":"2026-08-04T06:21:10","guid":{"rendered":"https:\/\/isbmblowmolding.com\/?p=1110"},"modified":"2026-08-12T09:53:45","modified_gmt":"2026-08-12T09:53:45","slug":"ps-pc-laboratory-container-injection-blow-molding","status":"publish","type":"post","link":"https:\/\/isbmblowmolding.com\/nl\/application\/ps-pc-laboratory-container-injection-blow-molding\/","title":{"rendered":"PS & PC Laboratory Containers Made with Injection Blow Molding Machines"},"content":{"rendered":"
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Industry Application \u2014 Laboratory & Medical Containers<\/p>\n

How IBM Machines Produce High-Clarity PS and PC Containers for Laboratory & Medical Use<\/h2>\n

A technical and application guide for laboratory supply manufacturers, medical device contract packagers, and scientific equipment producers evaluating injection blow molding machines for PS, PC, and high-clarity polymer container production.<\/p>\n<\/div>\n<\/div>\n

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Laboratory and medical-use containers represent a demanding and technically specialised segment of the IBM machine market. A sample collection bottle, a reagent container, a cell culture flask body, or a sterile specimen jar must meet requirements that consumer packaging never encounters: optical clarity that allows direct visual grading of the contents, dimensional consistency that ensures leak-free cap and septum sealing, chemical resistance to the broad spectrum of solvents and reagents encountered in laboratory use, and in some cases, autoclave sterilisation compatibility or gamma irradiation resistance.<\/p>\n

Polystyrene (PS) and polycarbonate (PC) are the two resins most associated with laboratory and medical container production \u2014 PS for its cost-effective glass-like clarity, PC for its exceptional impact resistance and high-temperature tolerance. Both run successfully on ZQ Series IBM machines, and both produce results that satisfy laboratory supply chain requirements for dimensional precision and optical quality. This article covers the production requirements, resin-specific processing considerations, and machine configuration guidance for PS and PC laboratory containers on IBM.<\/p>\n

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Why Laboratories and Medical Facilities Specify IBM Containers<\/h2>\n

Laboratory and medical containers are specified by procurement teams and quality assurance managers who evaluate containers against functional criteria that are different from consumer packaging:<\/p>\n

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  • Optical clarity for content assessment:<\/strong> In clinical, research, and diagnostic laboratory use, the ability to visually assess sample colour, turbidity, phase separation, or precipitate formation without opening the container is a fundamental workflow requirement. IBM-produced PS and PC containers achieve light transmittance of 85\u201392% in the visible spectrum \u2014 approaching glass \u2014 which no EBM process can match due to wall thickness variation and surface haze from parison contact.<\/li>\n
  • No weld line or pinch-off scar:<\/strong> Laboratory containers must not have internal projections, weld lines, or surface irregularities that could trap sample material, harbour microorganisms, or interfere with volumetric measurements. IBM produces bottles with no weld line at the base and no pinch-off scar \u2014 the interior is a smooth, continuous surface from neck to base, exactly as formed against the core rod.<\/li>\n
  • Cap and septum sealing integrity:<\/strong> Clinical specimens are sealed with screw caps or septum-fitted closures whose sealing performance depends on precise neck geometry. IBM’s injection-molded neck provides the dimensional consistency that ensures septa compress uniformly around the circumference, preventing micro-leakage that could compromise sample integrity or create biohazard exposure risk.<\/li>\n
  • Sterilisation compatibility:<\/strong> PC containers destined for reusable laboratory use must survive repeated autoclave cycles at 121\u00b0C without dimensional distortion or surface crazing. PC’s glass transition temperature of approximately 147\u00b0C provides the required thermal headroom. PS containers for single-use laboratory applications are compatible with EO (ethylene oxide) and gamma irradiation sterilisation \u2014 IBM’s zero-flash process produces containers with no surface stress concentrations from parison pinch-off that could initiate radiation-induced cracking.<\/li>\n<\/ul>\n

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    PS Containers: Glass-Like Clarity at Competitive Cost<\/h2>\n

    Crystal (general-purpose) polystyrene is the most cost-effective resin for high-clarity single-use laboratory containers. PS delivers light transmittance approaching that of optical glass in IBM-produced containers, combined with excellent surface gloss (60\u00b0 gloss values of 90\u201395 on mirror-polished IBM mold cavities) and consistent clarity from bottle to bottle. The absence of biaxial orientation in IBM-produced PS containers means that clarity is uniform across the entire bottle body \u2014 unlike ISBM-produced PET containers where stress birefringence can produce slight visual artifacts under polarised light.<\/p>\n

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    Typical PS Laboratory Container Applications<\/p>\n