Hoechst Trevira Gmbh & Co Kg

Johns Manville

Teijin Monofilament Germany Gmbh

Nextrusion Gmbh

Rex Delker

Kurt-Günter Berndt

Peter Klein

Hans Wagner

Dipl-Ing Hans-Joachim Bruning

Hubert Rathay

Joachim Stiller

Ralph Thielemann

Kurt-Günther Berndt

Reinhardt Schenzinger

Andreas Dirr

Described are antimicrobial strands comprising a) thermoplastic elastomer, b) polymer having a melting point of at least 10&#xb0; C. below the melting point of the thermoplastic elastomer and c) halogenated phenol. These strands are notable for an excellent antimicrobial effect, which survives repeated washing.

Antimicrobial strands, their production and their use

Described are melt-spun strands having a modulus of elasticity of from 8 to 14 GPa and an elastic extension of up to 1.5%, comprising a) a thermoplastic polyester, b) a thermoplastic elastomeric block copolymer, and c) carbon black and/or graphite particles in the form of aggregates aligned along the longitudinal axis of the strand which form electrically conductive paths along the longitudinal axis of the strand. The strands exhibit very high electrical conductivity and are useful for forming screens, wires, sieves or other technical/industrial wovens.

Electrically conductive strands, fabrics produced therefrom and use thereof

The invention is directed to a sheath core monofilament which displays enhance abrasion resistance. The core is a liquid crystalline polyester and the sheath is a blend of 1-5 percent by weight polycarbonate and a polyester.

Monofil bicomponent fibres of the sheath/core type

Monofils based on polyethylene-2,6-naphthalate are described containing 60 to 99.9 wt-percent polyethylene-2,6-naphthalate, 0.1 to 10 wt-percent of one or more liquid crystalline polymers, 0 to 15 wt-percent polybutylene terephthalate and 0 to 3 wt-percent of an inhibitor, as well as optionally additional additives, as is a melt-spinning process for producing the same. The filaments are characterized by good mechanical properties, in particular improved knot strength and resistance to hydrolysis. They are suited primarily for making screens, filters and reinforcing inlays.

Monofilaments based on polyethylene-2,6-naphthalate

Papermaking machine fabrics, filters and reinforcing layers for elastomers, comprise monofilaments of copolymers containing 85 to 99 mol % of the structural repeat unit of the formula I ##STR1## 1 to 15 mol % of the structural repeat unit of the formula II

Papermaking machine fabrics

Described are monofilaments with a core-sheath structure comprising a core of a thermoplastic polyester or copolyester and a sheath comprising a thermoplastic polyester, wherein the polyester or copolyester of the core has a melting point of 165.degree. to 290.degree. C., preferably of 220.degree. to 240.degree. C., and includes at least 70 mol %, based on the totality of all polyester structural units, of structural units derived from aromatic dicarboxylic acids and from aliphatic diols, and not more than 30 mol %, based on the totality of all polyester structural units, of dicarboxylic acid units which differ from the aromatic dicarboxylic acid units which form the predominant portion of the dicarboxylic acid units, and diol units derived from aliphatic diols and which differ from the diol units which form the predominant portion of the diol units, and the sheath comprises a polyester mixture comprising a thermoplastic polyester whose melting point is between 165.degree. and 240.degree. C., preferably 220.degree. and 240.degree. C., and a thermoplastic, elastomeric polyurethane with or without customary nonpolymeric additives. Also described are a process for producing the core-sheath monofilaments and their use in or for making textile sheet materials of high mechanical and chemical resistance.

High strength core-sheath monofilaments for technical applications

Described are monofilaments with a core-sheath structure comprising a core of a thermoplastic polyester or copolyester and a sheath comprising a thermoplastic polyester, wherein the polyester or copolyester of the core has a melting point of 200.degree. to 300.degree. C., preferably of 220.degree. to 285.degree. C., and includes at least 70 mol %, based on the totality of all polyester structural units, of structural units derived from aromatic dicarboxylic acids and from aliphatic diols, and not more than 30 mol %, based on the totality of all polyester structural units, of dicarboxylic acid units which differ from the aromatic dicarboxylic acid units which form the predominant portion of the dicarboxylic acid units, and diol units derived from aliphatic diols and which differ from the diol units which form the predominant portion of the diol units, and the sheath comprises a polyester mixture comprising a thermoplastic polyester whose melting point is between 200.degree. and 300.degree. C., preferably 220.degree. and 285.degree. C., and a thermoplastic, elastomeric copolyether-ester with or without customary nonpolymeric additives. Also described are a process for producing the core-sheath monofilaments and their use in or for making textile sheet materials of high mechanical and chemical resistance.

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Wehringen, Germany

Rex Delker