industrial pipes

Dow adhesives - an ideal choice
AMPLIFY™ GR 380, a functional polymer, is the latest version of Dow's advanced adhesives. It has been designed to combine superb processing characteristics with the excellent adhesion properties that are required for multilayered pipes and steel pipe coating.

The main application of this grade is for bonding polar layers such as EVOH, PET and Epoxy, which are necessary to incorporate a barrier layer or protect steel pipe against corrosion with the nonpolar polyethylene layer. The adhesion to the polar layers is obtained by a chemical reaction between the reactive groups of the adhesive and the polar components of the barrier or protection layer.

The adhesive grade AMPLIFY GR 380 has been designed with the long term temperature requirements of domestic pipe applications in mind. It has been tested to resist thermal oxidation according to EN ISO 2578 at the malfunction temperature of 100 C as specified in ISO 10508 in classes 4/5.

After a test time of almost 90 x the required malfunction condition, only insignificant decrease of the elongation at break were shown, which is significantly higher than the maximum permitted reduction of the original elongation at break of 75% as defined by EDIN 16837. According to the requirements in various standards (ISO DIS 21003, DVGW guidelines etc.) the peak crystallite melting point is >120 C. The peel strength exceeds the performance of competitor resins by up to 150%

It can be extruded using conventional techniques with melt temperatures between 180 and 230 degrees Celsius. In addition, when properly fabricated, the adhesive is expected to meet pipe coating specifications DIN 30670 and prEN 10285.

Detlef Schramm, Dow's Plastic Application technology leader Pipe for Europe, agrees that the adhesives is important: "a good quality adhesive is not an optional extra - it is essential to the performance of the whole multilayer pipe."

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