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A weekly look at new products, innovations
Dow Corning has introduced two silicone-based adhesive and sealant products that the company said can provide appliance manufacturers higher productivity, enhanced design options and savings.
Dow Corning said its 750 plastic surface adhesive sealant offers adhesion to low-surface-energy plastic substrates that are typically difficult to bond to. Dow Corning's HM-2600 silicone assembly sealant is an RTV silicone hot-melt adhesive that offers instant green strength for high-speed assembly, according to the company.
Dow Corning said low-surface-energy polymers such as polypropylene, polyethylene and fluoropolymers have traditionally been difficult substrates for adhesion, but its 750 plastic surface adhesive sealant is designed specifically to adhere to hard-to-bond surfaces. According to the firm, the product is suitable for bonding mechanical enclosures, sealing penetrations for plumbing, electrical lines or ducts, or adhering functional or decorative components to surfaces.
Dow Corning said its 750 plastic surface adhesive sealant shows superior adhesion on a variety of substrates and can be used in a wide range of temperatures. The firm said it offers excellent UV resistance and durability and does not become brittle or crack.
Dow Corning claims that its HM-2600 silicone assembly sealant offers excellent clarity, adhesion to many substrates (metals and various plastics including low surface energy types) as well as instant green strength to enable high assembly throughput. The adhesive is suitable for use with XY tables, robots and other automatic dispensing and assembly methods, the company said.
The product is certified to UL94 HB and is being tested for food contact and drinking water contact, the company said.
Dow Corning said the products offer stability over a wide temperature range, resistance to UV, weather and radiation, chemical stability, excellent electrical properties and low flammability.
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Davis-Standard L.L.C. exhibited a 3.5 inch extruder at the recent K Show in Duesseldorft, Germany, showcasing engineering updates such as a new extruder frame, feedscrew design and quick screw exchange technology. This extruder is designed for high temperature processes up to 300°C and those requiring specialty copolymer resins for film, coating, adhesion and molding applications.
The standardized extruder frame is built with additional space to simplify maintenance and improve heater access, the company said, and computer designed stainless steel feedscrews provide reliable melt homogeneity for resins such as acid copolymers, which the company maintains improves bond performance to materials such as aluminum foil.
Other extruder advantages include electrical barrel heating with air-cooled blowers for each zone; temperature controlled water cooling for gearbox oil cooler, water cooled screw and feed section; and fixed die support and thermal expansion capability, Davis-Standard said.
The QSE adapter enables processors to change the screw without dismantling the melt pipes, feed block and other components, according to the company. An extraction tool is included to change the breaker plate melt-filtering inserts manually. The adapter has an electrical pressure gauge, manual or motorized pressure spindle, double thermocouple for every heating zone, and breaker plate with two-screen pack, the company claimed.
For more information, visit this website.
AdvantaPure, a division of NewAge Industries, is offering a high purity silicone suction hose with a National Sanitation Foundation listing (NSF-51). Applications for the hose include ultrapure water transfer, food processing, beverage conveyance, washdown stations, skid systems, and other suction and discharge uses in the food, dairy, beverage, pharmaceutical, biopharmaceutical, chemical and cosmetics industries, the company said.
Called APSW, the hose begins with a liner of low volatile grade, platinum-cured silicone. The liner is slipped onto a mandrel and wrapped with four plies of polyester mesh fabric, 316 stainless steel reinforcing wire and additional silicone, according to the company, and it is then cured into a smooth, uniform hose.
APSW's new NSF listing assures the hose is made to carry a variety of food and beverage ingredients, the company said. The hose imparts no taste or odor to fluids flowing within it and is crush and kink resistant, according to AdvantaPure. Two styles are offered: smooth O.D. or, for an improved range of flexibility, convoluted, the company said, and both handle pressure and vacuum usage.
PSW has undergone extensive physical, chemical, and biological testing and meets USP Class VI, FDA CFR 177.2600, ISO 1099 and European Pharmacopoeia 3.1.9 standards, according to AdvantaPure. APSW handles temperatures from -100°F to 350°F (-73.3°C to 176.6°C) and is certified free of animal-derived ingredients.
The company said APSW silicone suction hose is sterilizable by autoclave, CIP, SIP and gamma irradiation processes. AdvantaPure stocks the hose in sizes ranging from one-half inch through 2-inch I.D., and larger sizes are in development.