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Tape casting machine, and method for producing ventilating waterproofing membrane using same

A casting machine and screw technology, which is applied in the field of plastic processing, can solve the problems of large air permeability deviation and uneven film thickness, and achieve the effects of improving thickness uniformity, improving performance, and uniform air permeability.

Active Publication Date: 2014-06-18
合诚技术股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current production method and production equipment of waterproof and breathable membranes have the technical problem of uneven thickness of the film produced by the casting machine, resulting in a large deviation in the vertical and horizontal air permeability of the produced waterproof and breathable membrane products, which is difficult to apply to the required air permeability deviation smaller field use

Method used

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  • Tape casting machine, and method for producing ventilating waterproofing membrane using same
  • Tape casting machine, and method for producing ventilating waterproofing membrane using same
  • Tape casting machine, and method for producing ventilating waterproofing membrane using same

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Embodiment Construction

[0032] see figure 1 , the tape casting machine of the present invention is arranged on the machine base, mainly consists of a feeding device, a screw and barrel extrusion device 2, a driving device, a heating device, a die head 3, a melt pressure control device, a melt density control device and a film lip The gap control device consists of a driving device and a feeding device at one end of the screw-and-screw extrusion device 2, a die head 3 at the other end of the screw-and-screw extrusion device 2, and a heating device at the screw-and-screw extrusion device 2 on. The feeding device includes a metering feeding device and a storage hopper 5, the metering feeding device is composed of 2 weighing scales 4, the storage hopper 5 is sealed and connected to the bottom of the weighing scale 4, and the storage hopper 5 is connected with a vacuum device 8, The vacuuming device 8 is a single-stage water ring vacuum pump, and the vacuuming device 8 is also connected to the end of the...

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Abstract

The invention discloses a tape casting machine, and a method for producing ventilating waterproofing membrane using the same. The tape casting machine comprises a feeding device, a screw-screw cylinder extrusion device, a heating device, a driving device for the screw, a die head, a melt pressure control device, a melt density control device, and a membrane-lip gap control device, wherein the melt pressure control device controls the heating device and the driving device according to the detected melt pressure signals to maintain the melt pressure stable; the melt density control device controls the feeding device according to the detected melt density signals to maintain the melt density stable; and the membrane-lip gap control device controls a membrane-lip gap regulating device according to the detected membrane-lip gap signals to maintain the membrane-lip gap stable. Combining the stable melt pressure, melt density and membrane-lip gap, thin membrane with even thickness extruded by the tape casting machine is ensured.

Description

technical field [0001] The invention relates to the technical field of plastic processing, in particular to a casting machine and a method for producing waterproof and breathable membranes. Background technique [0002] The waterproof and breathable membrane is mainly based on thermoplastics, added inorganic mineral fillers, extruded by casting cold roll forming method, and then stretched longitudinally to make it have a unique microporous structure. These micropores with a special structure distributed on the surface of the film with high density make the film not only block the leakage of liquid water, but also allow gas molecules such as water vapor to pass through. At present, the main application fields of waterproof and breathable membranes include personal hygiene care products, medical protective products (such as medical mattresses, protective clothing, surgical gowns, surgical sheets, hot compresses, medical pillowcases, etc.), personal protective products for spec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C41/24B29C41/52
Inventor 徐伟谢怀兴周开德莫兹冠诸泉蒋文真
Owner 合诚技术股份有限公司
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