Materials | technology TPE
New TPE grade developed for contact with drinking water
Hexpol TPE has launched Dryflex DW, a special range of TPE compounds for applica- tions that come into direct or indirect contact with drinking water.
The compounds have
passed German drinking water regulations, having been tested and approved according to ‘The Guideline for Hygienic Assessment of Organic Materials in Contact with Drinking Water’ (KTW Guideline) for cold and warm water (23°C/60°C). Dryflex DW TPE compounds
have no microbial growth without the use of biocides and have been approved according to DVGW Technical Standard W270.
This describes a test method to determine the STORM PIPE Storm water pipe has higher stiffness
Advanced Drainage Systems (ADS) has introduced a new type of storm water pipe called HPXR 75. The new technology provides higher
stiffness, is available in a range of sizes, and has significant cost benefits, says the company. ADS internally developed and designed HPXR 75. It incorporates a corrugated polypropylene (PP) pipe with a smooth outer wall that includes oriented fibreglass reinforcement – creating a pipe with increased stiffness and improved installa- tion performance. The product will be available in diam-
eters of 30-60in, and lengths of 13-20ft. HPXR 75 will allow for a broad range of
www.pipeandprofile.com
backfill materials and installation condi- tions, reducing costs while increasing installation speed with confidence of consistent line and grade, says ADS. The watertight bell and spigot exceeds ASTM D3212 and complies with ASTM F477. “HPXR 75 will enable us to make inroads
in the large and growing infrastructure and public construction markets for larger diameter storm pipe,” said Joe Chlapaty, chairman and CEO of ADS. “The construc- tion industry is seeking product options with improved service characteristics, installation durability and increased joint performance – and HPXR 75 will address those needs.” ❙
www.ads-pipe.com
May 2017 | PIPE & PROFILE EXTRUSION 43
microbial growth on non-me- tallic materials intended for use in drinking water systems, says Hexpol. They are available in
hardnesses from 50 to 90 Shore A, in natural and black – as well as custom colours with compliance certification. The raw materials used to
produce Dryflex DW TPEs are compliant with food contact regulation (EU) No 10/2011. They can be processed using injection moulding or extrusion, and bond to PP and PE in multi-component applications. Typical applications include both domestic and commercial applications such as plumbing seals, pipe fittings and shower heads, says the company. Philippe Julien-Labruyère,
sales director Hexpol TPE, said: “We don’t water quality to be impaired by unwanted odours, colours or flavours, or pick up any microbial contamination – and that is why we have developed the Dryflex DW range.” ❙
www.hexpoltpe.com
PVC
Bio-based PVC for flexibility
Sylvin Technologies has developed a series of bio-based flexible PVC compounds that use only FDA-sanctioned ingredients. Formulated from renew-
able feedstock, its new 39 series of compounds is formulated with a plant- based plasticiser rather than traditional plasticisers such as phthalates.
The series uses only
ingredients sanctioned for use by the FDA, though the compounds have the same feel, flexibility and ease of processing as traditional flexible vinyl products. The compounds are
suitable for processing by extrusion, and available in 55-95 Shore A hardness. ❙
www.sylvin.com
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