1 DuPont Performance Materials a broad range of advanced solutions for healthcare components DuPont Performance Materials delivers science-based, high quality thermoplastics to the healthcare industry. 1. These thermoplastics are used in the manufacture of demanding components across many different healthcare segments. DuPont Performance Materials a broad range of advanced solutions for healthcare components DuPont draws on its long experience in Materials research, application development, technology, safety and regulatory compliance to provide expert support to healthcare product manufacturers, backed by its Global manufacturing and supply strength.
2 The Key Properties Our Materials Can Offer Your Products Depending on the specific High Strength First and foremost, designers are looking for an optimum application, DuPont can deliver an balance of strength, stiffness and toughness with excellent molding characteristics. The right balance of appropriate solution from its broad these properties is the key to designing components for maximum reliability, safety and manufacturability. range of standard products, or from DuPont Delrin POM, having the most metal-like behavior of any unreinforced plastic due to its very high crystallinity, its portfolio of Special Control (SC) is often the first choice for designers.
3 And Premium Control (PC) grades, DuPont also offers a wide range of reinforced engineering plastics for applications requiring even higher stiffness, strength and creep resistance (See Figure 1). which are differentiated by a greater degree of testing, manufacturing Figure 1: Strength and Stiffness*. control and regulatory support. 250 Zytel HTN [PPA, GR50]. Zytel [PPA, LG50]. 200. Yield Stress/Tensile Strength, MPa 150 Rynite [PET, GR30]. Crastin [PBT, GR30]. Zytel [PA66, GR30]. Zytel [PA6, GR30]. 100 Delrin . [POM] PP GR30. Zytel Zytel . [PA6] [PA66] PC. Crastin [PBT]. 50 PS. ABS Reinforced resins PP. Unreinforced resins 0.
4 0 10. Tensile Modulus, GPa *Zytel conditioned to 50% RH. 2. DuPont Performance Materials a broad range of advanced solutions for healthcare components Low Friction Flexibility The selection of appropriate Materials in a tribological For applications requiring maximum flexibility DuPont . system (whenever two surfaces rub against each other) Hytrel , a plasticizer-free thermoplastic polyester elastomer is vital to ensure predictable Performance and to avoid (TPC-ET) is an innovative solution. excessive or variable friction, stick-slip effects, squeaking or Hytrel is super-resilient, providing excellent flex fatigue eventual total failure.
5 Resistance and spring-like properties, and can be used Secondary lubricants can address these issues over a wide range of temperatures while still retaining its but generally tend to be avoided by medical device flexibility and mechanical properties. It enables the design manufacturers as they require added controls for quantity of a variety of parts and products that combine the best and placement, contamination control and add one more features of both high- Performance rubbers and flexible variable in manufacturing. plastic Materials . DuPont Performance Materials has extensive experience in Available in the range of 30 to 82 Shore D hardnesses, product development and testing for low wear and friction Hytrel is also economical to process, using a variety of applications across many industries and offers several molding or extruding technologies (See Figure 3).
6 Grades for medical device manufacturers (See Figure 2). Figure 2: Typical Dynamic Coefficient of Friction* Figure 3: Flexibility Hytrel . 30 D 82 D. Plastics Rubber Delrin SC655.. Zytel SC310. Against Steel 50 60 70 80 90 100 110 120 130 140 150. 20 30 40 50 60 70 80 90 100. Rubber Shoe Rockwell R. Delrin SC652 Crastin SC164 band Shore A soles Delrin SC 699 NC10. 30 40 50 60 70 80. Shore D. 10 100 1000. 0. 0 Against Self Flex Modulus (MPa). *Dynamic coefficient of friction values can be impacted by load, speed, surface roughness, etc. 3. DuPont Performance Materials a broad range of advanced solutions for healthcare components Chemical Inertness and Resistance One of the outstanding properties of semi-crystalline versus amorphous plastics is their resistance to many chemicals, which provides a major benefit in today's healthcare industry where a wide range of substances is used for analysis, cleaning and disinfection, or as a drug carrier or conserving agent.
7 Since factors such as temperature, chemical concentration, exposure time, part surface to weight ratio and the plastic component's stress level can all affect Performance , it is highly recommended that a realistic end-use test be run to determine the suitability of a polymer grade in a particular application (See Figure 4). Barrier Properties Figure 4: Chemical Resistance Hospital Environment The ability of a package to protect its contents (whether in liquid, powder or gel form) against intrusion or loss of Solvents 3. O2, H2O or any other relevant molecule, directly affects the product's shelf life. A common way for packaging products Strong Oxidants 2 Chlorinated Solvents to obtain the right barrier behavior balance is to use a multi-layer structure.
8 However this solution is not always an 1. option for injection molded products. 0. DuPont Performance Materials resins offer excellent barrier Strong Bases Weak Acids properties, demonstrating a unique combination of very low POM water vapor transmission and O2 permeation. PA. TPC-ET Customers have sought solutions which protect healthcare Weak Bases Strong Acids PBT. personnel from patients' viruses and projections of bodily 100 Hours total exposure time. fluids (blood). They require Materials that provide protection TPC-ET Solvent resistance is highly dependent on type of solvent and grade of Hytrel . Chemical Resistance Ranking: but should not prevent the evaporation and evacuation of 0: Not resistant 2: Good resistance, either slight swell or limited to ambient temperature sweat moisture.
9 Unlike microporous structures, polymeric 1: Only very short term (5-10 min) resistance 3: Excellent resistance, no swell, also at elevated temperature monolithic membranes made in Hytrel specialty resins have no pores that can become clogged, and can provide excellent water vapor transmission for increased comfort. 4. DuPont Performance Materials a broad range of advanced solutions for healthcare components Sterilization Resistance Sterilization is a vital day-to-day procedure in the Healthcare sector, both for single-use and multiple-use devices, so it is important that Materials used in medical components are not affected by this process.
10 The broad range of Materials offered by DuPont Performance Materials provides a suitable solution for nearly every sterilization approach as noted in the table below. This allows manufacturers to select the best material for their specific application requirements (See Table 1). Table 1: DuPont Performance Materials Resistance to Sterilization Sterilization Process*. Product Autoclave <25 Cycles Autoclave 25 100 Cycles Gamma 1 Cycle E-Beam 1 Cycle EtO 1 Cycle DuPont Zytel PA66 1 1 1 1. DuPont Zytel PA612 1 1 1. DuPont Delrin POM. DuPont Hytrel TPC-ET. 2 2. (from 30 to 82 Shore D). DuPont Crastin PBT. Appropriate Limited Not Recommended 1 Yellowing 2 Softer Grades * Steam: Ultrasonic wash at 87 C + 3 min at 134 C, Gamma: 40 kGy, E-Beam: 50 kGy, ETO: 50 C, 2 hr exp.