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Carding roller used for machining Teflon ultra thin and short fiber

A polytetrafluoroethylene and short fiber technology, which is applied in fiber processing, textile and papermaking, filament/thread forming, etc., can solve the problems of uneven fineness, long preparation process, coarse fiber fineness, etc. The effect of reducing requirements

Active Publication Date: 2015-04-22
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These preparation methods have problems such as long preparation process, coarse fiber fineness or insufficient uniform fineness.

Method used

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  • Carding roller used for machining Teflon ultra thin and short fiber
  • Carding roller used for machining Teflon ultra thin and short fiber
  • Carding roller used for machining Teflon ultra thin and short fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as Figure 5 As shown, the unwinding machine is used to feed the PTFE uniaxially stretched film into the starting position of the carding roller through the front guide roller, through the carding roller slitting blade, and after slitting, it is introduced into the winding through the rear guide roller machine and rewind.

[0025] The carding roller adopts a slitting blade with a thickness of 0.1mm, and 16 rows of slitting blades are arranged in each cycle on the surface of the carding roller. The PTFE uniaxially stretched film passes through the carding roller to form a polytetrafluoroethylene with a fineness of 0.6dtex. Vinyl fluoride staple fiber.

Embodiment 2

[0027] Such as Figure 5 As shown, the unwinding machine is used to feed the PTFE uniaxially stretched film into the starting position of the carding roller through the front guide roller, through the carding roller slitting blade, and after slitting, it is introduced into the winding through the rear guide roller machine and rewind.

[0028] The carding roller adopts a slitting blade with a thickness of 0.2 mm, and 32 rows of slitting blades are arranged in each cycle on the surface of the carding roller. The polytetrafluoroethylene uniaxially stretched film passes through the carding roller to form a polytetrafluoroethylene with a fineness of 0.6dtex. Vinyl fluoride staple fiber.

Embodiment 3

[0030] Such as Figure 5 As shown, the unwinding machine is used to feed the PTFE uniaxially stretched film into the starting position of the carding roller through the front guide roller, through the carding roller slitting blade, and after slitting, it is introduced into the winding through the rear guide roller machine and rewind.

[0031] The carding roller adopts a slitting blade with a thickness of 0.1 mm, and 32 rows of slitting blades are arranged in each cycle on the surface of the carding roller. The PTFE unidirectional stretch film forms a polytetrafluoroethylene film with a fineness of 0.3 dtex after passing through the carding roller. Vinyl fluoride staple fiber.

[0032] In the three embodiments, the polytetrafluoroethylene uniaxially stretched film must pass through more than one slitting blades arranged in a cycle to ensure the uniformity of the polytetrafluoroethylene short fibers.

[0033] The fineness of the PTFE staple fiber can be controlled by the thick...

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Abstract

The invention discloses a carding roller used for machining Teflon ultra thin and short fiber. A plurality of cutting blades are distributed on the cylindrical surface of the carding roller, the blades are arranged in the whole cylindrical face in the peripheral direction of the carding roller to form m circulations, m is a positive integer larger than or equal to two, in each circulation, the cutting blades are linearly arranged in the axis direction of the carding roller to form 2n rows, n is a positive integer larger than or equal to one, the thickness of the blades is X, the multiple cutting blades are arranged according to the rule that the multiple cutting blades in the second row are shifted to the left by X / 2 in the axis direction relative to the multiple cutting blades in the first row and the multiple cutting blades in the 2nth row are shifted to the left by (2n-1)*X / 2n in the axis direction relative to the multiple cutting blades in the first row, and therefore it is guaranteed that the tracks of all the cutting blades in the peripheral direction in each circulation do not coincide with one another. It is avoided that the cutting blades are influenced by the thickness of the cutting blades when being mounted through the cutting blade distribution mode, and the Teflon short fiber with the fineness smaller than 1dtex can be made.

Description

technical field [0001] The invention relates to a carding roller, in particular to a carding roller for processing polytetrafluoroethylene ultrafine short fibers. Background technique [0002] PTFE fiber has many advantages such as high temperature resistance, corrosion resistance and oxidation resistance, and is widely used in high temperature dust removal and filtration fields such as power plants, cement plants and waste incineration plants. Its preparation methods include paste extrusion, film cracking and emulsion spinning Silk and other methods (PTFE fiber processing technology, Polymer Bulletin, 2013, Issue 10, 80-88). PTFE short fibers are widely used in the preparation of air filter materials. The fineness of fibers affects the filtration efficiency of filter materials. How to prepare finer PTFE short fibers is an important way to improve the filtration efficiency of filter materials. Existing patents disclose some preparation methods of polytetrafluoroethylene sho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/42
Inventor 张华鹏郭玉海王峰来侃陈美玉
Owner ZHEJIANG SCI-TECH UNIV
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