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A preparation method and device for microfluidic ultrafine fibers in a polymer melt film

A microfluidic and polymer technology, which is applied in fiber processing, stretch spinning, textiles and papermaking, etc., can solve the problems of low production efficiency, strong molecular curl, affecting fiber performance, etc., and achieve fast molding speed and reduced Flow resistance, effect of improving mechanical properties

Active Publication Date: 2020-01-03
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

[0003] Chinese patent (patent publication number CN102154725A) discloses a method for producing high flame-retardant polyvinyl chloride fiber by solution spinning, but the production efficiency of this method is not high, and the molecular curl of the ejected fiber microstructure is strong, which affects the fiber performance

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  • A preparation method and device for microfluidic ultrafine fibers in a polymer melt film
  • A preparation method and device for microfluidic ultrafine fibers in a polymer melt film
  • A preparation method and device for microfluidic ultrafine fibers in a polymer melt film

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Embodiment Construction

[0021] The invention provides a microfluidic superfine fiber manufacturing device in a polymer melt film, which is composed of a microfluidic extrusion unit and a traction stretching unit; wherein the microfluidic extrusion unit includes an upper die 33, a lower die Die 34, upper and lower die gap adjustment screw 35, microfluidic copper strip 36, such as Figure 4 Shown; Wherein the traction stretching unit comprises traction roll 1, transverse stretching nip roll 2, as figure 1 shown.

[0022] The invention discloses a method for manufacturing microfluidic superfine fibers in a polymer melt film. The molten PVC material extruded into the hanger-type sheet head by an extruder enters the flow channel between the upper die 33 and the lower die 34. , the molten PVC material flows from the middle to both sides along the hanger-shaped flow channel, passes through the microfluidic copper strip 36 installed at the upper and lower positions of the extrusion lip, extrudes a PVC film ...

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Abstract

The invention discloses a polymer melt intramembrane microfluidic superfine fiber preparation method and device. The polymer melt intramembrane microfluidic superfine fiber preparation device consists of a mircrofluidic extrusion unit and a drawing unit. The microfluidic extrusion unit includes a hanger type sheet extruded head and a microfluidic copper strip. The drawing unit comprises a traction roller and a transverse tensile roll. The hanger type sheet extruded head divides melt PVC material, the melt PVC material flows from center to both sides to flow though the microfluidic copper strip which is inset at the extruded head mouth and engraved with grooves along the traction direction so that the membrane section forms thick or thin sawteeth, and then the melt material flows into the traction unit. In the traction unit, the traction speed of the traction roller is higher than the extrusion speed of the head. The membrane is stretched and thinned and the micromolecular structure is drawn in the direction of traction. The transverse tensile roll draws the membrane transversely and tears the same into a large number of polyvinyl chloride fibers. The polyvinyl chloride fibers produced by the polymer melt membrane microfluidic superfine fiber preparation method has good mechanical properties of molecular micromolecular structure and stronger mechanical properties. The molding process is simple and has good application prospects.

Description

technical field [0001] The invention relates to a technology for manufacturing superfine fibers, in particular to a technology for manufacturing microfluidic superfine fibers in a polyvinyl chloride melt film. Background technique [0002] At present, the production technology and manufacturing process of ultrafine fibers mainly include direct spinning improvement method, polymer side-by-side spinning method, electrospinning method, stripping composite spinning method, multi-layer composite spinning method, blending and splitting method. and Sea Islands Act, etc. The production and preparation method of polyvinyl chloride fiber is mainly the solution spinning method. Solution spinning needs to use organic solvents such as acetone to make polyvinyl chloride into a solution, and then spray the solution through a spinneret to obtain polyvinyl chloride fiber. [0003] Chinese patent (patent publication number CN102154725A) discloses a method for producing high flame-retardant p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/42D01D5/16
CPCD01D5/16D01D5/426
Inventor 谭晶徐竞雯丁玉梅杨卫民
Owner BEIJING UNIV OF CHEM TECH
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