Bayer Aktiengesellschaft

Ul LLC

Underwriters Laboratories, Inc.

Bahman Sarabi

Burkhard Kohler

Martin Wanders

Thomas Mrziglod

Klaus Salewski

Roland Loosen

Herbert Eichenauer

Dieter Wittmann

Thomas Eckel

Heinrich Alberts

Klaus Reinking

Edgar Leitz

Klaus Kraft

Martin Behrendt

Wolfgang Ebert

Friedrich Jonas

Karsten-Josef Idel

Hans-Detlef Heinz

Udo Wolf

Klaus Zander

Jürgen Flecke

Eckhard Wendt

Andreas Wende

Sabine Dorf

Hans-Dieter Schmitz

Dietmar W&auml;chtler

Wilfried Teeting

Martin Meyer

Wilfried Teering

Dietmar Wächtler

Bernd Kunert

Wilfried Thieler

The invention relates to a method and a device for testing the fire hazard of a material. According to one embodiment of the method, a plane region of the surface of a specimen made of the material is brought in contact for at most a predetermined contact time with a glow wire, which has been heated to a predetermined temperature. Image data of the specimen are furthermore acquired by at least a first camera at least while the specimen is in contact with the glow wire. Image processing of the acquired image data of the specimen is furthermore carried out, preferably in realtime, ignition of the specimen by the glow wire being detected if applicable. A first duration is then determined, which corresponds to the length of time between the application of the tip of the glow wire on the specimen and the ignition of the specimen. Furthermore, according to one embodiment of the invention, a second duration may if applicable be determined by means of the image processing of the acquired image data of the specimen, the second duration corresponding to the length of time between the application of the tip of the glow wire on the specimen and the end of the ignition of the specimen. The method and the device are suitable in particular for carrying out tests to assess the fire hazard of materials according to the standards EN 60695-2-10, -12 and -13.

Method and device for testing the fire hazard of a material

The image data capture of a test piece is performed with at least one first camera. A reference point of the test piece is determined by processing the image data recorded with the at least one first camera. A burner is positioned at a prescribed first distance from the reference point for the flame exposure of the test piece. At least one second camera may also detect whether the test piece exposed to a flame is burning or incandescing. At least one third camera may be used for monitoring the burner flame and at least one fourth camera may be used for determining whether the test piece drips while burning. Furthermore, at least one detector may used for detecting whether the drips ignite a pad of wadding positioned under the test piece.

Method and apparatus for carrying out a burning test on a test piece

A stress/strain curve is established by means of neural networksto N andTo that end, parameters are input into the inputfrom which the neural networksto N respectively establish the principal components of characteristic points. The curve type is selected on the basis of the output of the neural networkThe principal components of the characteristic points of the corresponding curve type are then inverse-transformed. The stress/strain curve is then calculated by the generatoron the basis of the inverse transformation.

Method for establishing stress/strain curves by means of spline interpolation on the basis of characteristic points and with the use of neural networks

A method of determining properties relating to the manufacture of an injection-molded article is described. The method makes use of a hybrid model which includes at least one neural network and at least one rigorous model. In order to forecast (or predict) properties relating to the manufacture of a plastic molded part, a hybrid model is used which includes: one or more neural networks NN, NN, NN, NN, . . . , NN; and one or more rigorous models R, R, R, R, . . . , which are connected to one another. The rigorous models are used to map model elements which can be described in mathematical formulae. The neural model elements are used to map processes whose relationship is present only in the form of data, as it is typically impossible to model such processes rigorously. As a result, a forecast (or prediction) relating to properties including, for example, the mechanical, thermal and rheological processing properties and relating to the cycle time of a plastic molded part can be made.

Hybrid model and method for determining manufacturing properties of an injection-molded part

A method of predicting the properties (e.g., mechanical and/or processing properties) of an injection-molded article is disclosed. The method makes use of a hybrid model which includes at least one neural network. In order to forecast (or predict) properties with respect to the manufacture of a plastic molded article, a hybrid model is used in the present invention, which includes: one or more neural networks NN, NN, NN, NN, . . . , NN; and optionally one or more rigorous models R, R, R, R, . . . , which are connected to one another. The rigorous models are used to map model elements which can be described in mathematical formulae. The neural networks are used to map processes whose relationship is present only in the form of data, as it is in effect impossible to model such processes rigorously. As a result, a forecast relating to properties including the mechanical, thermal and rheological processing properties and relating to the process time of a plastic molded article is obtained.

Hybrid model and method for determining mechanical properties and processing properties of an injection-molded part

The relationship between the stress &sgr; and the strain &egr; is firstly established in step with short-term tests as a function of the temperature T. In steps to , a Findley model is extended in such a way as to obtain a relationship between the strain &egr; and the stress &sgr; as a function of the time t and the temperature T. The two models are combined in steps and , so as to obtain overall a relationship between the stress &sgr; and the strain &egr; as a function of the time t and the temperature T.

Method and computer system for establishing a relationship between a stress and a strain

The present invention relates to thermoplastic graft polymer moulding compositions for high-gloss applications, which exhibit a reduced tendency of the additives to exude out of the thermoplastic composition during processing, and which exhibit reduced deposit build-up in the mould.

Graft polymer moulding compositions with reduced deposit formation

Thermoplastic polycarbonate/graft polymer moulding compositions containing

Polycarbonate/graft polymer moulding compositions with reduced deposit

The invention relates to polyarylene sulfides (PAS), preferably polyphenylene sulfide (PPS), reduced in viscosity by aftertreatment of the PAS formed in the production process with disulfides in the melt.

Polyarylene sulfides reduced in viscosity by aftertreatment with

Thermoplastic polyalkyleneterephthalate moulding compounds prepared by blending

Thermoplastic polyalkyleneterephthalate moulding compounds

The invention relates to polyarylene sulfides (PAS), more particularly polyphenylene sulfides (PPS), showing reduced flash formation.

Blends of PAS, nitroarylketo compounds and maleic imides

This is invention relates to thermoplastic compositions of polyphenylene sulphide with an addition of silver nitrate which have improved crystallization properties and to a process for their preparation.

Polyphenylene sulphide composition containing silver nitrate

This invention relates to polyarylene sulphides (PAS) containing certain nitro compounds with reduced flash formation.

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Krefeld, Germany

Bahman Sarabi