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Moldable optical silicones
Dow Corning moldable optical silicone materials are distributed by this company to manufacturers and fabricators in the U.S., Canada and Mexico. MS-0002, MS-1001, MS-1002, MS-1003 and MS-2002 (white reflector) moldable optical silicone materials are said to offer cutting-edge benefits for commercial and residential lighting, automotive and consumer applications. Optical component designs have typically been limited to materials like glass, polycarbonate and PMMA, according to the company. But with the market demands for more efficient, safer, longer-lasting and durable lighting systems, optically clear LSR materials are said to be providing an innovative alternative. These flexible materials are said to offer excellent optical clarity, can withstand heat and resist yellowing better than plastic, and are lighter than glass, according to the company.

R.D. Abbott
www.rdabbott.com

Post date: 7/27/2016

 
Tire retreading principles
The Art of Retreading is a book written by Danilo Pasotti, who has more than 30 years of experience with tire retreading. The book is written to help retreaders understand basic principles, best operating practices and common pitfalls in the retreading process. ()

TechnoBiz
technobiz-asia.com

Post date: 7/27/2016

 
Lubricated TPVs
Lubricated TPVs A thermoplastic vulcanizate elastomer for pipe seals is said to exhibit the same processing and performance advantages over thermoset rubber as a well-established TPV, while providing enhanced lubricity for faster insertion of seals and more error-free assembly, according to the company. For use in seals for non-pressure water and drain pipe, Sarlink 9156-02 is said to provide physical properties nearly identical to those of Sarlink 9156B, a workhorse compound for pipe seals; but as a lubricated compound it is said to exhibit a coefficient of friction that is only 16% as high. The substanially greater lubricity of Sarlink 9156-02 is said to be a big advantage for inserting the seals into the fittings, a mechanical process in which lubrication increases speed and helps to prevent rejects, according to the manufacturer.

Teknor Apex
www.teknorapex.com

Post date: 7/27/2016

McLube
Liquid silicone rubber
A novel liquid silicone rubber grade is said to achieve an extremely high 90 durometer A hardness after curing. Elastosil LR 3003/90 is processed by injection molding and cures rapidly to form an exceptionally hard and high-modulus elastomer. This is said to make the material ideal for cost-effective, large-scale production of dimensionally stable silicone products. It can also be used as the hard component in hard/soft combinations. The Elastosil LR 3003 series is already said to offer a selection of liquid silicone rubber grades with durometer A hardness values ranging from 3 to 85. With the Elastosil LR 3003/90, the company is said to present a product that outperforms all other liquid silicone rubber in hardness and rigidity. The cured material almost falls into the transition zone between an elastomer and a thermoset. On the one hand, the cured rubber still possesses a certain degree of elasticity, while on the other hand, it features very high dimensional stability for an elastomer, according to the company. It has a hardness of 90 durometer A or, measured with a durometer D tester, 33 durometer D. Alongside this hardness, which was previously unattained with liquid silicone rubber, Elastosil LR 3003/90 is said to feature an exceptionally high modulus. It is thus more rigid than the cured products of all previous liquid silicone rubber grades, according to the manufacturer.

Wacker Chemie AG
www.wacker.com

Post date: 7/27/2016

 
Rubber transfer adhesive
In response to market demand for a pressure-sensitive adhesive designed to replace mechanical fasteners, reduce component weight and act as an assembly aid in manufacturing applications, a high strength rubber transfer adhesive has been developed. With a specially formulated, proprietary construction, the highly durable adhesive solution is designed to provide a secure bond to a wide variety of materials and surfaces, including low energy surfaces like polyethylene and polypropylene, as well as those that are uneven or irregular, according to the company. Unlike liquid alternatives, this rubber-based adhesive is said to deliver immediate bonding with less cleanup and waste. As an added benefit, the high strength adhesive can be applied without special equipment, reducing customer labor costs, increasing production assembly efficiency and delivering a notable return on investment, according to the manufacturer.

Mactac
www.mactac.com

Post date: 6/21/2016

 
Hydroxyl-terminated diols
Krasol hydroxyl-terminated diol resins are based on homopolymers of butadiene and are said to be characterized by low volatiles content, low glass transition temperatures, excellent hydrophobicity and a highly reactive functionality, according to the manufacturer. The company manufactures Wingtack and Cleartack hydrocarbon resins, Poly bd, Ricon and Krasol liquid polybutadiene resins, SMA copolymer resins and Dymalink monomers. These products are used as raw materials and additives for adhesives, rubber, electronics, thermoplastics, coatings and other applications.

Total Cray Valley
www.crayvalley.com

Post date: 6/21/2016

Struktol
Nitrile elastomer product
EnDura Z90LT is a hydrogenated nitrile elastomer compound specially developed for high pressure applications to reduce the risk of rapid gas decompression seal failure and maintain resilience at low temperatures. The EnDura range of elite elastomer materials has been developed specifically for use in downhole, surface and subsea oilfield equipment, offering excellent rapid gas decompression resistance, according to the manufacturer. The range includes material grades that are said to provide the ultimate in chemical resistance and low temperature performance for use in arctic conditions. EnDura is said to be the most technically advanced range of elastomer materials available, developed to deliver oilfield sealing technology to exceed oil and gas operators' performance requirements, according to the company. EnDura elastomers are said to have better chemical resistance than conventional explosive decompression grades, greater low temperature capabilities, and are compliant with many international explosive decompression standards. EnDura Z90LT is a low temperature HNBR which is said to meet the requirements of the industry standards ISO 23926-2 and Norsok M710, unlike conventional low temperature HNBR materials.

Precision Polymer Engineering
www.prepol.com

Post date: 6/21/2016

 
Engineering polymers
Axpoly high quality recycled engineering polymers are said to be suitable for injection molding. Created from a fully-integrated recycling process for end-of-life vehicles (ELV) and WEEE materials, all grades are said to be fully traceable from the end user polymer grade back to the origin of the source material. The company's control of the entire process is said to mean it can offer a consistent polymer supply and price stability because its cost of incoming raw material is not linked to volatile oil markets. Manufactured to strict quality standards, all Axpoly grades are REACH-ready and RoHS compliant. HIPS (high impact polystyrene), ABS, polypropylene (PP) and polystyrene (PS) grades can be customized to satisfy the demands of customers' application requirements, according to the company. They include Axpoly HIPS52 1009, suitable for a wide range of applications and recovered from automotive feedstocks, as is Axpoly ABS52 1000, a high-performance polymer said to be ideal for the specific needs of end-user applications, such as components for motor vehicles and other durable goods.

Axion Polymers
www.axionpolymers.com

Post date: 6/21/2016

 
Rubber carbon blacks
Three rubber carbon black products are said to create more fuel efficient tires in response to consumer demand and federal standards for vehicle fuel economy. These grades are said to offer reduction in rolling resistance via narrow particle size distributions and lower sidewall hysteresis, and lower air permeation through the inner liner for better tire inflation consistency. Compared to standard ASTM grades, a carbon black with narrow aggregate size distribution is said to feature better in-rubber properties. Depending on the dispersive mixing technology, tread wear is said to improve by up to 13% with narrow ASD carbon black technology as compared to the current state of the art. For sidewall applications, blending Ecorax S 204 combined with N300 series grades is said to reduce sidewall hysteresis significantly, and thus lower rolling resistance and improve fuel efficiency, while maintaining other key tire propeties. Each compound can be individually optimized to find the best compromise. Ecorax S 204 is said to achieve the lowest hysteresis of any furnace carbon black, something that cannot be achieved with silica, while providing good reinforcement for natural rubber based products, according to the company. Ecorax S 206 is said to reduce air permeation through the inner liner by up to 25%, maintaining tire air pressure critical for vehicle safety and tire life in addition to fuel efficiency, according to the company.

Orion Engineered Carbons LLC
www.orioncarbons.com

Post date: 6/21/2016

McLube
Surgical lighting polymers
Udel polysulfone and Radel polyphenylsulfone medical-grade polymers helped Medical Illumination International, a manufacturer of surgical systems and equipment, to design a more compact version of its MI-1000 surgical lighting unit. High-performance polymers form three injection molded components in the MI-750 LED lighting system, including a handle, a handle post and the lamp's yoke attachment. In addition to supporting stable placement of the lamp during surgery, Udel and Radel polymers are said to enable the molded components to deliver durable performance after frequent chemical disinfection and steam sterilization.

Solvay Specialty Polymers
www.solvayspecialtypolymers.com

Post date: 6/21/2016

 
Liquid injection molding
Liquid injection molding The KEG-2000-60 LIMS (liquid injection molding system) is used to manufacture silicone wrist bands. Offering dynamic viscosity, KEG-2000 products are said to exhibit higher viscosity under low shear stress (pumping and shut-off) and lower viscosity under high shear stress (injection). They are said to be engineered for outstanding performance in both open and closed-nozzle cold-runner systems. Additionally, the KEG-2000 series has consistent properties from batch to batch, excellent clarity, and ranges in durometer A hardness from 20 to 80, according to the manufacturer.

Shin-Etsu Silicones of America
www.shinetsusilicones.com

Post date: 6/21/2016

 
Medical TPEs receive USP Class VI approval
Medical TPEs receive USP Class VI approval USP Class VI approval has been announced for a thermoplastic elastomer material designed for use in medical and biopharmaceutical applications. MT-1205l was developed to address the increasing demand for medical TPE tubing applications. This transparent elastomer is a high-purity compound with low leachables and extractables required for ensuring patient safety. Due to the material's flexibility, durability, neutrality and recyclability, it is said to be a desirable alternative to PVC and thermoset rubber for medical tubing. It also provides less gas permeability and more design flexibility than silicone, at a lower cost. Polymax MT medical materials have already gained acceptance in medical applications, according to the manufacturer. They have been approved for medical use due to their tactile feel, high level of transparency, kink resistance and ability to withstand various sterilization methods like gamma, ethylene oxide and steam. The medical grade materials are elastic, flexible TPE compounds said to have a unique tactile feel available in a hardness range from 70 to 92 durometer A. They passed cytotoxicity tests according to ISO 10993-5 and GB 14233 for medical use by the China Food and Drug Administration. The addition of USP Class VI approval to the company's material certifications is said to allow it to offer alternative solutions to the U.S. medical market for a variety of tubing and non-tubing applications. The company's product line includes materials appropriate for additional medical applications, including tourniquets, medical films, syringe plunger seals, drip chambers, connectors and test tube plug caps. These materials range in durometer A hardness from 35 to 95 and cover a broad spectrum of physical properties.

Polymax
www.polymaxtpe.com

Post date: 6/21/2016

Struktol
Liquid silicone rubbers
Three advanced bio-medical grade liquid silicone rubber materials are available in durometer A hardnesses of 40, 50 and 70. These high-performance products comprise the Silastic Q7-78XX series of elastomers. In addition, the company has launched the C6-7XX liquid silicone rubber series of materials for short term or non-implant applications with three initial products. These additions are said to further expand the company's portfolio of silicone elastomers, offering customers new possibilities for designing innovative, next-generation medical device applications. The silicone elastomers solutions share a uniform chemistry optimized at the molecular level. This uniformity is said to help ensure highly reproducible processing and performance across medical device designs.

Dow Corning
www.dowcorning.com

Post date: 6/21/2016

 
LSR dispensing systems
The Fluid Automation F4-5 and F4-55 liquid silicone rubber (LSR) dispensing equipment is offered for wearables applications. The Fluid Automation F4 series systems are designed to keep the dispensing of two-component LSR consistently precise, with two flow meters ensuring the material remains on-ratio. The F4-5 and F4-55 dispensing equipment is said to help reduce costs by eliminating off-ratio dispensing and therefore waste caused by non-cured products. The system's two flow meters are said to allow for constant oversight of dispensing ratios. If the system encounters an issue and off-ratio conditions exist, it automatically shuts down to prevent wasted material and unusable products.

Graco
www.graco.com

Post date: 6/21/2016

 
Medical tubing polymers
Medical tubing polymers Medical-grade tubing compounds are offered, including Apex flexible PVC, Flexalloy PVC elastomers and Medalist thermoplastic elastomers. In addition, the company has developed Apex SCR stress crack resistant rigid PVC compounds for tubing connectors. Because its portfolio of medical tubing products is so diversified, the company can take a polymer-neutral approach to the support it offers customers, helping them to select exactly the right compound to meet a particular performance or regulatory requirement. The portfolio of Medalist elastomers was expanded to offer suitable alternatives to PVC, silicone and TPU for medical tubing. Thirteen standard and specialty compounds of varying hardnesses and offering a spectrum of physical properties are offered.

Teknor Apex
www.teknorapex.com

Post date: 6/21/2016

McLube
Silicone elastomer range
A wide range of silicone elastomers featuring outstanding properties that are used in many different applications in the energy sector, outperforming most other polymers through their high performance characteristics such as remarkable spreading capability coupled with outstanding resistance to extreme temperatures, UV and IR radiation, as well as many other external agents, is offered by the company. Bluesil products are said to be an adaptive toolbox with immense possibilities.

Bluestar Silicones
www.bluestarsilicones.com

Post date: 6/21/2016

 
Strong silicone elastomers
With a tensile strength up up to 50% greater than existing silicone elastomers on the market, and a combination of material properties that make it not only strong, but also uniquely soft and pliable, the company's high strength silicone is said to pave the way for significant advancements in medical device design and performance. The platinum-cure silicone elastomers are said to provide device and component manufacturers with a super strong, low durometer, high elongation material without compromising hysteresis or tensile set. Devices can be made thinner, stronger and more resilient.

NuSil Technology LLC
www.nusil.com

Post date: 6/21/2016

 
Liquid silicone rubber
Silopren LSR RSH (reduced self-healing) is said to be capable of providing significantly reduced self-healing of valve slits and offers potential benefits to a wide range of valve and fluid-flow products in the food, medical and infant care industries. Silicone slit valves often experience sticking or self-healing issues when subjected to harsh conditions. On medical devices such as needle-free infusion systems, a risk with valve healing is decreased dose precision of liquid or fluid. The slitting design in both medical and food applications presents a challenge for manufacturers who often have to add a non-stick surface treatment to facilitate separation of the slit surfaces or provide special handling and storage instructions for valve opening. The Silopren LSR RSH series is said to have improved material properties that can help solve the self-healing issue of slit valves.

Momentive Performance Materials
www.momentive.com

Post date: 6/21/2016

Struktol
Silicone gap filler for electronics applications
Silicone gap filler for electronics applications A heat-conducting silicone-based gap filler material has been introduced for the electronics industry. Available under the tradename Semicosil 961 TC, the silicone rubber is said to be ideal as an interface material for thermally connecting electronic circuits, ensuring effective heat management. The product is characterized by good flow and processing properties. Wear of the mixing and metering equipment used in its application is said to be low. With the silicone gap filler material, the company is expanding its portfolio of thermal interface materials. Semicosil 961 TC is a highly filled, two-part silicone rubber that cures at room temperature via a platinum-catalyzed addition reaction to form a soft silicone elastomer with a tacky surface. The cured rubber achieves a thermal conductivity of two watts per meter kelvin and, at the same time, is electrically insulating. Before it cures, Semicosil 961 TC is a non-sag material. However, its viscosity decreases with increased shearing, for example during mixing and metering. Its shear-thinning property is adjusted so that the silicone rubber can easily be fed by machine and applied as a bead. Processors can achieve a high metering rate and very high dosing accuracy, according to the company. Semicosil 961 TC is said to ensure optimum heat transfer from the electrical circuit to a heat sink. In practice, the gap filler is first applied to the heat sink. The circuit board is then pressed on or fitted by means of a vacuum process. During compression, a continuous film forms that conforms snugly to the surfaces of the two joining parts. In this way, surface irregularities and tolerances can be evened out perfectly, according to the company. Furthermore, the film maximizes the contact area and thus promotes heat transfer. The film cures to form a silicone layer between the joining parts. Thanks to its soft consistency, it ensures a reliable, tight fit, even if there are frequent temperature changes and vibrations.

Wacker Chemie AG
www.wacker.com

Post date: 6/21/2016

 
Water-based primers
Water-based primers for the Chemlease and Zyvax brands create a full water-based release system for composites manufacturers. Specially formulated to overcome challenges in wind, aerospace and fiber-reinforced plastics markets, the primer series is currently available in most countries. The series joins the company's existing water-based product portfolio, including Chemlease and Zyvax release agents, cleaners, sealers, topcoats and now primers. Available as a complete system for the composites industry, the water-based products are said to optimize new and used tool surfaces to enhance performance through increased release ease, extended tool life and reduced HSE (health, safety and environment) impact. Additional benefits are said to include imparting a high gloss on the tool surface for high-quality finished parts, lower VOCs, longer periods between top-coat touch-ups, and more.

Chem-Trend
www.chemtrend.com

Post date: 6/21/2016

 
Polymer additives
Additives are designed to provide greater processing and performance capabilities for compounders, processors and end users. TR 063A is a highly-efficient lubricant and viscosity reducer for nylon 6 and nylon 6,6 compounds. The product boasts a novel chemistry which makes it highly compatible with polyamides and is superior in performance to alternative lubricants such as Montan ester waxes, according to the company. TR 063A can be added directly at the compounding stage or by the processor during part manufacturing. In pellet form, it can be easily added to extrusion or injection molding machines. TR 044W provides a combination of viscosity reduction and mold release characteristics for polycarbonate resins and compounds. Loading levels as low as 0.2% result in increased melt flow and allow for significant improvements in mold filling and release, according to the company. Processors using TR 044W in clear applications will see minimal haze development even at higher loading levels. The improved processability can result in lower molded-in stress in injection molding applications that often are said to mean better part performance.

Struktol Company of America
www.struktol.com

Post date: 6/21/2016

McLube
Preform manufacturing
Products and manufacturing technologies are available for the large volume production of structural parts for the automotive industry. A CFRP reinforced body in white parts is made with HexPly M77 preforms from the company's automated process. The preforms' low tack allows for automated handling by the customer. They require no surface preparation and are designed for one-step bonding and curing in a press, requiring no finishing operations. Common BIW part joining technologies such as welding can be used, and the parts are said to be compatible with e-coating processes. The company's HexPly M77 resin cures in two minutes at 150C, or 1.5 minutes at 160C, and is available as HexPly M77 prepreg or as HexMC molding compound, which is said to be ideal for complex shapes. The gel time of M77 allows the resin to quickly flow into mold contours to achieve precise geometries, and the high Tg of 130C enables cured parts to be demolded while warm for faster production cycles. Building on the attributes of HexPly M77, the company has installed a fully automated production line in Austria that converts UD prepreg into 2D preforms in seconds.

Hexcel
www.hexcel.com

Post date: 4/13/2016

 

 
 
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