Hose Manufacturing Baltimore MD

Smooth isn t smooth enough: This was the target set by the developers of the new PU hoses. Using a patented new process that combines the positive features of an extruded hose with the special properties of elastomers, seamless smooth-bore hoses can now be manufactured of polyurethane (PU). Developer of the process and the world s only manufacturer of the new hose class Master-PUR Inline is Masterflex AG, Gelsenkirchen, Germany.

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Smooth isn t smooth enough: This was the target set by the developers of the new PU hoses. Using a patented new process that combines the positive features of an extruded hose with the special properties of elastomers, seamless smooth-bore hoses can now be manufactured of polyurethane (PU). Developer of the process and the world s only manufacturer of the new hose class Master-PUR Inline is Masterflex AG, Gelsenkirchen, Germany.

Conventional smooth hoses are extruded items that are spirally wound and have a welded seam. However, it is precisely this welded seam that represents a constructional weak point. In general, this is where abrasion of the hose material due to conveyed material is highest, leading to increased wear.

Special material
Thermoplastic elastomers are mainly used for the extrusion of spiral hoses. This material class combines the elastic properties of elastomers with the processing advantages of thermoplastics. In principle, this unique material combination can be obtained by the following procedures:

  • During mixing of a thermoplastic with an elastomer, the thermoplastic forms a continuous phase, in which the elastomer constituents are finely distributed. Included in this material group are e. g. thermoplastic vulcanizates, thermoplastic olefin elastomers (TPO), etc.

  • If elastic and thermoplastic elements are combined in a molecular chain, the thermoplastic elements create physical linking points, which permit thermoplastic processing above their softening points. Included in this material class are e. g. thermoplastic polyurethanes (TPU), thermoplastic copolyesters (TPC, also TPEE), etc.

    When comparing the properties of the most important thermoplastic elastomers, it becomes clear that TPU is best suited for use in spiral hoses (Table 1).Thermoplastic polyurethanes belong to the block copolymers. Their molecular structures are formed by means of poly addition using long-chained dienes, diisocyanates, and short-chained dienes.Hard and soft segments are created, which consist of different chemical structures and must exhibit a certain incompatibility. In this way, TPUs combine high elasticity with low abrasion to provide outstanding mechanical strength in a wide temperature range.

    In-depth knowledge about the properties and the behavior of thermoplastic elastomers were the starting point for development of the new, seamless smooth hose class. During the patented manufacturing process, the individual components for the inner and outer wall layers combine permanently into a firm material. Suitable material combinations of the two components permit the hose to be adapted to the most varied application areas.

    To read the full article, visit Ringiertrade.com
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