Exxonmobil Chemical Patents Inc.

Reifenhäuser Gmbh & Co. Maschinenfabrik

Reifenhaeuser Gmbh & Co Kg Maschinenfabrik

Reifenhauser Gmbh & Co Kg Maschinenfabrik

Refenhaeuser Gmbh & Co. Kg Maschinenfabrik

Peter Schlag

Detlef Frey

Hans-Georg Geus

Claudio Cinquemani

Antonios K Doufas

Derek Wade Thurman

William Michael Ferry

Cynthia Ann Mitchell

Jeanne Marie MacDonald

Jerome Sarrazin

Rahul Ravindra Kulkarni

Hans Georg Geus

An apparatus for continuously making a spunbond web of filaments comprises a spinneret, a cooling chamber into which process air for can be introduced for the purpose of cooling the filaments, a monomer suction device between a spinneret and cooling chamber, a stretcher and a deposition device for depositing the filaments of the spunbond web. The cooling chamber is divided into two cooling compartments, and process air can be suctioned out from a first upper cooling compartment at a volumetric flow rate (V) to a monomer suction device. Process air exits from the first upper cooling compartment at a volumetric flow rate (V) into a second lower cooling compartment and from the first upper cooling compartment at a volumetric flow rate (V) into a second lower cooling compartment. A ratio (V/V) is 0.1 to 0.35.

Apparatus for making a spunbond web from filaments

The invention relates to a device for producing a spun-bonded web from filaments, comprising spinnerets, a cooling chamber into which process air can be introduced in order to cool the filaments, a monomer suction device arranged between the spinnerets and the cooling chamber, a stretching unit, and a placing device for placing the filaments so as to form the spun-bonded web. The cooling chamber is divided into two cooling chamber portions. Process air can be suctioned out of a first upper cooling chamber portion to the monomer suction device with a volumetric flow rate V, and process air exits the first upper cooling chamber portion into a second lower cooling chamber portion with a volumetric flow rate V. The volumetric flow rate ratio V/Vis 0.1 to 0.3.

Method of making a spunbond from filaments

This invention relates to polypropylene fibers and fabrics containing polypropylene fibers, the fibers comprising propylene polymers comprising at least 50 mol % propylene, said polymers having: a) a melt flow rate (MFR, ASTM 1238, 230&#xb0; C., 2.16 kg) of about 10 dg/min to about 25 dg/min; b) a dimensionless Stress Ratio/Loss Tangent Index R[defined by Eq. (8)] at 190&#xb0; C. from about 1.5 to about 30; c) an onset temperature of crystallization under flow, T, (as determined by SAOS rheology, 190&#xb0; C., 1&#xb0; C./min, where said polymer has 0 wt % nucleating agent present), of at least about 123&#xb0; C.; d) an average meso run length determined byC NMR of at least about 55 or higher; and e) optionally, a loss tangent, tan &#x3b4;, [defined by Eq. (2)] at an angular frequency of 0.1 rad/s at 190&#xb0; C. from about 14 to about 70.

Polypropylene fibers and fabrics

A method of conveying and treating a web, wherein the web is first conveyed over a transport surface and then over a rotating transfer roller at the end of the transport surface. The web is transferred from the transfer roller to a treatment roller at a spacing from the transfer roller. The conveying of the web is performed with the proviso and particularly a spacing a between the transfer roller and the treatment roller is set such that the web wraps around the treatment roller over a wrap angle &#x3b1; from 15&#xb0; to 90&#xb0;.

Method and apparatus for conveying and treating a web

An apparatus for producing spun-bond webs has, beneath the receiving belt, a suction unit having at least two suction zones including a primary suction zone and at least one other suction zone, the primary suction zone receiving most of the filaments from an aerodynamic stretching unit below a spinneret. The suction speeds in the two zones can be adjusted independently of one another. Preferably three such zones are provided in succession in the direction of displacement of the perforated belt.

Apparatus for the continuous production of spun-bond web

A spun-bond web-making apparatus has the cooling passage below the spinneret provided with a plurality of air chamber sections which are supplied with air at different temperatures, the cooling passage being connected to the drawing unit for aerodynamic stretching of the filaments without a gap through which external air can be supplied.

Growing community of inventors

Troisdorf, Germany

Peter Schlag