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Pressure strip is an uncured modified butyl rubber designed to be placed in corners where pressure is difficult to apply with only a vacuum bag. Pressure strip will cure on a 250 °F (120 °C) or a 350°F (176°C) lay-up in autoclave or oven. Maximum use temperature is 450 °F (230 °C). Pressure strip is used as an expendable item and discarded after each cure. Pressure strip is applied on top of the release film in the corner of the lay-up prior to vacuum bagging. Pressure strip is a compound of butyl rubber, resin plasticizers, and fillers. There are no silicones used in the manufacture of this product.
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S/PVC WATERPROOFING MEMBRANES TANDEM EXTRUSION LINE
2 layers + carrier membranes
Capacity up to 4000 kg/h
Width 2100 mm
Thickness range 0,6 – 2,5 mm
Speed up to 25 m/min
In-line custom rolls winding and palletizing unit
Following the recent market trend that is gradually more in favour of synthetic components than bituminous ones, AMUT manufactures extrusion lines producing waterproofing membranes capable to treat different thermoplastic materials, such as F/PVC, TPO, TPE. The use of these materials definitely improves the technical performances and the physical features of the membrane, complying with the specific exigencies required by the civil works sector.
AMUT technology allows to:
1-produce the membrane in one-step, without getting back the roll twice or three times as was used to do, using a sole calender properly designed. This process reduces the costs and simplifies the management operations to the operator;
2- guarantee a flexible production to permit the processing of different materials on the same line;
3- produce multi-layer products extruding reinforcing elements among the layers to enhance the mechanical resistance of the finished product;
4- laminate a support base, usually on the lower side of the membrane, as protection.
AMUT has currently started the build of a line, addressed to a large German customer, to produce TPO membrane, with a length of 2.120 mm, two layers of plastic material and with a thickness range from 0,6 to 2,5 mm.
Among the possible structures of the membrane, it is intended an inner reinforcing scrim, a bottom protective/supportive fleece – fleece-back – and an upper coating with signal layer.
The total capacity is around 2400 kg/h and giving an annual membrane production of more than 5 Million m².
A double-entrance calender consents to obtain the two external layers “sandwich” geometry, which keep the reinforcement in polyester or in fibre glass, and the coating of the signal film with the fleece-back.
The line is also equipped with a thickness gauge system, an automatic winder group to produce jumbo and custom roll and a control system PC/PLC.