Updating robust reliability
Both types of specimens can be used for the estimation of fracture toughness and the R curve of the inner layer material.The application of a protecting pipe with a higher value of the Young modulus (E1/E2 A PE80-based composite pipe was fabricated.
In certain cases however, incold climates, for pressure or thin-walled pipes, high impact strength is essential.The generalunderstanding of impact improvement of thermoplastics is that the presence of a second –elastomeric – phase is essential to absorb the mechanical energy of the impact stress.However, it is also known that certain inorganic particles can have a positive influence on impactstrength, like nanoclays or fine talc in PP or ultrafine-coated precipitate calciumcarbonate in PVC.Lacking an ASTM requirement to be in a specific area of color space, the organic pigment formulas are seen to reach the same area of color space as current commercial pipe with no economic penalty.Organic pigments broaden possible application areas for rework and reduce disposal issues as well.One of the last domains reserved for traditional materials, high pressure applications are opened for plastics by using intelligent reinforcements with highly oriented polymer fibres like Kevlar.
Certainly, a lot of new reinforced thermoplastic pipes (RTP) are in development.
To improve the interfacial interaction between the reinforcement and the pipe, polyethylene yarns were fabricated by a micro-braiding technique for use as the reinforcement.
This pipe showed excellent long-term creep strength compared with the PE80 gas pipe or pipes reinforced with other kinds of resin.
We have developed an inorganic material based on synthetic amorphous silicon dioxide withan average primary particle size of 150 nm and a specific surface area of 20 m2/g, called SIDISTAR Every one knows that plastic is a fantastic material in a fault and rain water application field.
There are lots of advantages in use of plastics: very good hydraulics (low material roughness), no incrustation (no sediment / sludge influence on a pipe surface), tightness of connections, durable materials / long life of a system, chemical resistance, light weight, ease of installation.
Several new applications are imaginable in the future.