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Medical TPVs replace rubber in o-rings
Medical TPVs replace rubber in o-rings Medical-grade thermoplastic vulcanizate (TPV) elastomers for injection molded o-rings, gaskets and diaphragms are said to exhibit excellent long-term sealing performance, cost less to process than thermoset rubber, and provide manufacturing advantages over standard TPVs and styrenic TPEs, according to the company. Medalist MD-23100 compounds are said to provide rubber-like elasticity, superior long-term compression set and chemical resistance. Unlike some standard TPVs, compounds in the Medalist series are non-hygroscopic, rendering pre-drying unnecessary, and their lighter natural hue makes them easy to color, according to the manufacturer. Medalist MD-23100 Series compounds are also said to exhibit better high-temperature stability than styrenic TPEs. Medalist MD-23100 Series TPVs are available with durometer A hardness levels from a soft 15 to a semi-hard 73. With melt flow rates ranging as high as 24 g/10 minutes, the TPVs are suitable for molding small, high-precision parts in complex, multi-cavity tools. The compounds are suitable for overmolding onto polypropylene. The manufacturer recommends the compounds for sealing components used in devices for drug delivery, fluid transfer, dialysis, endoscopy and other procedures, and in such equipment as feeding devices and pumps. The company produces Medalist MD-23100 Series compounds in ISO-13485 certified facilities in the United States and Singapore.

Teknor Apex
www.teknorapex.com

Post date: 6/26/2018

 
Lubricious silicones
NuSil high-purity biomaterials offered by the company include lubricious silicone solutions and in-situ cure technology for liquid silicone rubber. Medical devices are said to benefit from high-performance, biocompatible silicone lubricants to reduce friction. Other desirable properties of lubricious silicones for medical devices include oxidative resistance, chemical inertness and hydrophobicity. NuSil lubricious silicones are available in a broad portfolio of off-the-shelf solutions, including self-lubricating elastomers, as well as dispersions, fluids and greases, according to the company. In addition, NuSil applications experts can work with medical instrument and device manufacturers to customize products.

Avantor
www.nusil.com

Post date: 6/26/2018

 
Biocompatible epoxy
Formulated for medical electronic applications, EP62-1LPSPMed is a biocompatible two-part epoxy that has a mixed viscosity of 150-300 cps. Its ultra low viscosity is said to make it ideal for use in underfill, impregnation and porosity sealing applications, while it also performs well in bonding, coating or encapsulation, according to the company. This product is said to exhibit excellent wetting properties and can readily flow by capillary action in tight clearances.

Master Bond
www.masterbond.com

Post date: 6/26/2018

 
Liquid silicone rubber
Elastosil LR 5040 grades are said to feature excellent mechanical properties after curing, even without post-cure treatment. The Elastosil LR 5040 series products contain reduced volatile content with recommendations for sensitive applications in the baby care, healthcare and automotive industries. In many cases, fabricators do not need to post-cure the elastomers following vulcanization, according to the company. Silicone parts intended for use in sensitive applications are subject to rigorous regulations and are limited to no more than 0.5% volatile substances. Ensuring compliance with this limit, thermal post-cure treatment is often necessary. This requires heating the cured parts to temperatures of 200C for several hours in a ventilated oven. Elastosil LR 5040 is designed in such a way that this silicone rubber already complies with current regulatory requirements governing applications in the baby care and healthcare and automotive industries, without post-cure. In many cases, customers may be able to eliminate the post-curing of the silicone parts for these sensitive applications, according to the manufacturer. Rubber parts made with Elastosil LR 5040 are translucent.

Wacker Chemical
www.wacker.com

Post date: 6/26/2018

 
Medical use compounds
Thermolast M compounds are approved for use in direct contact with blood and medications. These materials can be colored in conformity with medical compliance requirements and open up new potential fields of application, according to the manufacturer. TPE compounds of the Thermolast M portfolio can be used for medical and pharmaceutical applications such as primary medical packagings, hospital care applications and resealing membranes. Thermolast M compounds have passed standard biocompatibility certifications. These portfolio materials are certified according to DIN ISO 10993-5 (cytotoxicity), 10 (intracutaneous irritation), 11 (acute system toxicity), USP Class VI and DIN ISO 10993-4.

Kraiburg TPE
www.kraiburg-tpe.com

Post date: 6/26/2018

 
Medical TPEs for face masks and cushions
Medical TPEs for face masks and cushions Two lines of medical-grade thermoplastic elastomers for injection molded face masks include a deformation-resistant series of flexible masks and a series of gels that provide a gas-tight cushion for rigid ones molded from polypropylene. Medalist 50100 Series TPEs for flexible masks are said to be more deformation-resistant than PVC and, as thermoplastics, provide a more economical alternative to silicones, according to the company. In respiratory therapy oxygen masks, the Medalist TPEs are flexible enough to provide a comfortable fit on the face, yet retain their shape during packaging and storage, without need for inserts. Their PVC-like transparency facilitates patient monitoring. Medalist 50100 Series compounds are available in durometer A hardnesses of 58, 68 and 73. Medalist 10100 Series TPE gels for rigid-mask cushions bond to polypropylene in insert or two-shot molding, providing a less expensive alternative to the traditional air-filled PVC balloon cushions that must be glued onto the rigid component. The super-soft cushion conforms to the patient's face to ensure a gas-tight fit that is more secure than the PVC cushion and has a lower profile on the face. Grades in the series include a clear 8 durometer A compound and a transulucent one with 18 durometer A hardness. Pre-colored compounds are available to enable device manufacturers to differentiate their product offerings. Medalist compounds are produced in ISO-13485 certified facilities in the USA and Singapore.

Teknor Apex
www.teknorapex.com

Post date: 6/26/2018

 
Adhesives for disposable medical devices
Adhesives for disposable medical devices Adhesives offered for use in disposable medical devices are LED-curable at either 385 nm or 405 nm. The 215-CTH-UR-SC line of products is said to be ideal for fast bonding of difficult to bond plastic substrates typically used in specialty catheter devices, allowing manufacturers to enjoy the benefits of LED curing without sacrificing speed or cured mechanical properties. This adhesive line is available in multiple viscosity grades to fit a variety of application designs. Featuring the company's Encompass technology, they are said to provide visual cure confirmation through the firm's See-Cure and Ultra-Red fluorescing technologies. The company's adhesive solutions can be cured with the BlueWave LED Flood curing unit and the MX-250 high-intensity LED spot-curing system. The company is said to develop innovative oligomer, adhesive, coating, dispensing and light-curing systems for applications in a wide range of markets. The company's products are said to be perfectly matched to work seamlessly with each other, providing design engineers with tools to dramatically improve manufacturing efficiency and reduce costs. Major markets for the company's adhesive products are said to include medical device, aerospace, appliance, automotive, electronics, industrial and metal finishing.

Dymax
www.dymax.com

Post date: 6/26/2018

 
High viscosity silicone fluid
SFR100 silicone fluid is a high viscosity silicone containing a combination of a linear silicone fluid and a silicone resin that is soluble in the fluid. The resulting mixture is clear and colorless. SFR100 silicone fluid can be considered for polyolefins and thermoplastics used to help impart flame retardancy. When compounded properly with known organophosphous flame retardants, or Group II A metal organic salts and other ingredients, varying degrees of flame retardancy enhancement can be obtained.

Momentive Performance Materials
www.momentive.com

Post date: 6/26/2018

 
HCR and LSR products
High consistency rubber and liquid silicone rubber products are supplied by the company for electrical and hybrid vehicles as solutions for batteries and cables; in construction to assist with ash cohesion or fire resistance; and for regulated markets such as food contact and medical grade requirements. The company, which operates nine multifunctional manufacturing sites and research and development centers around the globe, offers a full range of silicone technologies for such markets as aerospace, automotive, energy, healthcare, personal care, textile, construction, consumer goods, and more.

Elkem Silicones
www.elkem.com

Post date: 6/26/2018

 
Nickel-aluminum silicone
The company's nickel-aluminum silicone is said to provide EMI shielding, resist galvanic corrosion and offer an offset to Chomerics 6502. SSP-2529 is said to be ideal for marine environments and is available in molded sheets and extruded profiles. The dark gray, 68 durometer shielding silicone also has shorter lead times and lower minimum order quantities than the competition, according to the manufacturer. The shielding effectiveness for SSP-2529 was tested at over 100 dB between 20 MHz and 2,000 MHz per MIL-DTL-83528F. Test results from an independent, third party laboratory report a minimum attenuation level of 93 dB at 10 GHz, and a best case attenuation level of 135 dB at 80 MHz. SSP-2529 was also tested according to ASTM B117, which defines a standard practice for operating a salt spray apparatus. Galvanic corrosion testing involved 168 hours of salt spray exposure at 95F. The weight loss of the aluminum sample was only 0.08%. SSP-2529 is filled with nickel-coated aluminum particles that provide EMI shielding and electrical conductivity.

Specialty Silicone Products
www.sspinc.com

Post date: 6/26/2018

 
Pre-cured, single-component silicone solution
Pre-cured, single-component silicone solution CLG Series materials are said to be ideal for a broad base of general electronics cooling applications, offering a wide range of thermal conductivity. The one-component CLG gap filler greases are said to be simpler to use, requiring no mixing or use of a two-part meter-mix equipment system. Notably, the material does not need to cure after it is dispensed, so there is no time-consuming waiting or heating involved to cure after dispensing, and no resulting curing process by-products, according to the company. The materials are said to offer a low volatile content with excellent resistance to pump-out and creeping. Featuring a gel-like consistency, the material is applicable on a myriad of surface shapes, easily filling voids between heat sources and heat sinks, according to the manufacturer. By displacing the air from these nooks and crannies, a lower themal resistance is achieved. Notably, the CLG gap filler material can be applied only where it is needed, thereby minimizing waste. The materials can also be reworked, because they do not adhere to substrates. The soft material's low hardness is said to minimize stress on delicate electronic components. Additionally, the viscosity is said to allow for ease of dispensing, reduced process times, and there are no unique storage requirements, according to the company. (Shin-Etsu Silicones of America)

Shin-Etsu Silicones of America
www.shinetsusilicones.com

Post date: 6/26/2018

 
LSR for LAM 3D printing
Silastic LC 3335 is a 50 durometer A hardness, one to one mix (parts A and B) liquid silicone rubber designed for liquid additive manufacturing (LAM) 3D printing. Silastic LC 3335 is said to combine the performance benefits of silicone rubber with the design and processing advantages of additive manufacturing. Applications include preparation of silicone rubber prototypes with properties that are comparable to injection molded components; low volume or highly customized manufacturing of complex parts; and new design options in automotive, consumer care, cookware, lighting and other applications where traditional LSRs are used. Silastic LC 3335 is said to give excellent process performance due to its improved rheology.

Dow Corning
www.dowcorning.com

Post date: 6/26/2018

 
Solid silicone rubber
Elastosil R plus 4350/55 solid silicone rubber, an extrudable addition-curing silicone grade, is said to offer high resistance to heat. Heat stabilizers enable the solid silicone to withstand temperatures up to 300C in continuous service without any substantial effect to its elasticity or mechanical properties. The Elastosil R plus 4350/55 silicone rubber can be exposed to 400C for brief periods of time without issue. The silicone rubber is therefore said to be suitable for components that are repeatedly exposed to heat over lengthy periods. Elastosil R plus 4350/55 is a silicone rubber for formulating heat-resistant, addition-curing silicone elastomers. The silicone grade is said to be easy to process in extruders.

Wacker Chemical
www.wacker.com

Post date: 6/26/2018

 
Medical TPEs used for plunger stoppers
Medical TPEs used for plunger stoppers Medical grade thermoplastic elastomers for injection molded plunger stoppers are said to provide improved syringe performance, are less costly and easier to mold than natural and isoprene rubber, and are said to provide processing advantages over thermoplastic vulcanizate elastomers. Stoppers molded from Medalist TPEs are said to perform well in both glass and plastic syringe barrels, achieving a consistent piston release and travel force due to a low coefficient of friction. The compounds can be overmolded onto plungers, eliminating an assembly step. In addition to grades for overmolding onto polypropylene, specialty grades are available that, unlike TPVs, can be overmolded onto engineering resins like polycarbonate, ABS, PC/ABS, acrylic, acetal, PBT and COPE. Also, unlike most TPVs, the Medalist TPEs do not require pre-drying, according to the company. Medalist TPEs are said to exhibit improved compression set in comparison with competing TPEs, making possible a more secure seal. The compounds can be molded in high-cavitation tooling. All grades are sterilizable and are available in natural or black colors. The Medalist compounds are said to provide substantial advantages over rubber, which has been the predominant material for use in syringe stoppers. TPEs avoid the curing step required in rubber processing, eliminating concerns about extractables and leachables, and unlike rubber, their scrap can be recycled.

Teknor Apex
www.teknorapex.com

Post date: 6/26/2018

 
Rubber process oil
A high-performance grade has been added to the company's process oil line, designed to meet the demands of the market and help customers tackle challenges such as reducing rolling resistance, boosting fuel economy and sourcing reliable supply. The Nytex 846 process oil is said to provide all of the advantages of pure naphthenic oils, such as high compatibility with polar and non-polar rubber, ease of processing and excellent low-temperature properties. The product's low color allows for its use in the formulation of innovative end products within the full color range. Nytex 846 is produced using state-of-the-art hydrotreating technology, and its polarity is designed to ensure it performs will in conjunction with a wide range of polymers, including natural rubber, SBR, polybutadiene rubber and halobutyl rubber, as well as EPDM.

Nynas Naphthenics
www.nynas.com

Post date: 6/26/2018

 
Recycling additives
An expanded line of additives for reuse/recycled plastics and for polymer compounds that contain recycled content is available from the company. The products are said to be useful in a variety of different resin systems, from polyolefins to engineered plastics, offering greater processing efficiency and enhanced performance, according to the company. They are targeted at compounds containing 100% recycled material or materials with varying levels of post-consumer or post-industrial recycled content. www.struktol.com

Struktol Company of America
www.struktol.com

Post date: 6/26/2018

 
Masterbatch additive
Genioplast PP50S12 is a novel all-around masterbatch additive for polypropylene compounds. Genioplast PP50S12 is an ultra-high molecular weight silicone gum additive which is said to improve scratch and mar performance, reduce the coefficient of friction and provide a soft and non-tacky surface. Genioplast PP50S12 is a pelletized masterbatch formulation containing 50% of a non-reactive, ultra-high molecular weight silicone gum. Dispersed in a polypropylene homopolymer, Genioplast PP50S12 has been specifically developed as an indispensable additive to improve scratch and mar resistance in polypropylene-based compounds, especially for automotive interior applications, according to the company. Unlike amides and fatty acids typically used to obtain surface effects for automotive interior parts, Genioplast PP50S12 does not migrate and bloom on the surface, and therefore provides reduced fogging effects and offers other enhanced characteristics, such as smoothness and improved appearance. (Wacker Chemical)

Wacker Chemical
www.wacker.com

Post date: 6/26/2018

 
Naphthenic oil products
Compatible with all sorts of rubber, naphthenic oil is said to facilitate the dispersion of insoluble sulfur, the vulcanizing agent used in the production of tire rubber. Sulfur is used as a crosslinking agent during the vulcanization of rubber, and although ordinary sulfur is the most commonly used vulcanizing agent, many producers, especially those that make tire rubber, prefer to use insoluble sulfur, according to the company. Insoluble sulfur is said to avoid issues related to migration. Migration, or sulfur bloom, refers to the crystallization of sulfur on the surface of rubber. This occurs because normal sulfur is soluble and will dissolve within the rubber. When the rubber is heated during the vulcanization process, the sulfur can migrate to the surface, where it will crystallize as the rubber cools. For tire rubber and other high-end rubber products, sulfur bloom will cause problems in subsequent processing steps, according to the company. Naphthenic oil is said to be particularly suitable because it efficiently prevents reversion back to the soluble form. At the same time, it also enables the curing agent, in this case insoluble sulfur, to be properly incorporated into a wide selection of rubber.

Nynas Naphthenics
www.nynas.com

Post date: 4/16/2018

 
Fluoroelastomer coating
PLV2020 is a Viton (Chemours) fluoroelastomer-based formulation in an aerosol spray can. The product is said to provide superior performance characteristics compared to other aerosol spray coatings. PLV2020 is a black, one-part coating available in a 12 ounce aerosol spray can, said to provide ease and speed of application, a smoother finish with no brush streaks, and no post-application brush clean-up. PLV2020 enables the quick application of a thin, chemically resistant, rubbery coating of Viton fluoroelastomer, according to the company. It has a higher solids content compared to other aerosol coatings for better deposition and thickness, so fewer coats are said to be required. As a Viton formulation, PLV2020 is said to provide resistance to corrosive liquids, including sulfuric, nitric and hydrochloric acids; oil and fuel; and hydrocarbons and chlorinated solvents.

Pelseal Technologies
www.pelseal.com

Post date: 4/16/2018

 
Electrically conductive and ESD compounds
Electrically conductive and ESD compounds The E-TEC range of electrically conductive and ESD compounds is said to offer surface resistivities from 1 x 109 to less than 103 ohms square (according to ASTM D257 and IEC61340-2-3), providing solutions to key market sectors, in particular for electrical and electronics, automotive, consumer and industrial products, and ESD packaging, storage and distribution applications. These E-TEC grades are said to offer customers enhanced electrical performance for film and sheet, profile extrusion, injection molding, vacuum forming and closed cell foams. E-TEC grades have been formulated to offer superior mechanical properties, along with the added benefits of enhanced process capability, excellent weldability and good aesthetics, according to the comapny. In addition to the standard range, the firm also provides customer specific E-TEC products. The company offers specialty additive products which are said to provide end use application performance attributes, including anti-fog, anti-static, anti-block, anti-slip, anti-stick, antibacterial, fire retardancy, UV protection for film packaging, as well as biodegradable, fully recyclable grades. All of the company's products aim to provide both added value processing benefits, such as higher throughput rates, as well as improved quality and functional performance, according to the firm. The company offers global service for high quality black, white and color masterbatches, compounds and performance enhancing additive masterbatches. All of the firm's manufacturing sites meet ISO 9001 quality standards.

Colloids Plastic (Suzhou) Ltd.
www.colloids.com

Post date: 4/16/2018

 
Automotive composites
Lightweight automotive composite products are based on the company's Araldite, Rimline and Vitrox technologies. These solutions are said to effectively enable automotive original equipment manufacturers to reduce vehicle weight, speed production of parts and increase fuel efficiency in vehicles where they are used. Low viscosity, fast cure Vitrox and Rimline resins are used for automotive parts requiring high strength and toughness. The Araldite liquid compression molding system is used to reduce part processing times and production cycles.

Huntsman
www.huntsman.com

Post date: 4/16/2018

 
Thermoplastic polyolefins
Adopted as a replacement for more traditional materials like metal, thermplastic polyolefins (TPOs) are said to help deliver improved fuel economy and the protection of important car features, along with premium and durable interior and exterior aesthetics. Engage polyolefin elastomers are said to enable compounders to develop high flow, low density TPO materials to produce durable and lighter weight parts, helping reduce vehicle weight. The company works with customers around the world to help them transition from metal to lighter weight materials, like TPO, as well as to discover new TPO applications, like fenders and hatchback rear lift gates. The company's TPOs are said to provide improved stiffness/toughness/flow balance to ensure protection of important car features; improved aesthetics for exceptional interior part design; enabling proliferation of TPO in new components in the automobile to further reduce vehicle weight; and a global supply chain that is said to ensure customers with a reliable supply when they need it and in the quantity they need, from bags to bulk.

Dow
www.dow.com

Post date: 4/16/2018

 

 
 
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