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Planar elements incorporating basalt fibers for use in papermaking apparatus

A technology of basalt fiber and planar components, which is applied in the direction of papermaking, paper machine, textile and papermaking, etc., and can solve the problems of roller damage, erosiveness of the roller surface, etc.

Inactive Publication Date: 2008-09-10
卡当特网络系统股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However experiments have shown that the glass reinforcement can be too aggressive for some roller surfaces and can lead to roller damage
Also, doctor blades with glass fabric run at a higher frictional resistance, resulting in more energy being required to maintain a constant roll speed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0013] A fabric of type BSL220 from the Basaltex division of Group Masureel, Wevelgem, Belgium, was chosen for incorporation into the synthetic doctor blade. This fabric is made from 100% BCF (Basalt Continuous Filament) fibers woven into a 220 gsm flat weave construction with 10 threads per cm in the warp and 9.6 threads per cm in the weft.

[0014] Sizing BSL200 fabric with aminosilane (P8) for compatibility with epoxy resins. The sized fabric was then coated with an epoxy-type resin, bisphenol A epoxy resin supplied by Vantico Ltd. of Duxford, Cambridge, UK, and resin impregnated / Pre-dipping process to B-stage the sized fabric. Ten layers of the resin-impregnated fabric were then laminated together to form a doctor blade having a thickness of 1.66 mm and a glass transition temperature of 160°C.

example 2

[0016] The doctor blades were produced as described in Example 1 with the only difference that an epoxy novolac resin obtained from Vyduit Ltd. was used as the binder resin, thus resulting in a glass transition temperature of 180°C for the resulting doctor blades. In various embodiments, the doctor blade may have a glass transition temperature between about 120°C and about 350°C, and preferably between about 160°C and about 180°C. In further embodiments, the doctor blade may have a thickness of between about 0.8 mm to about 3.0 mm, and preferably from about 1.0 mm to about 2.0 mm.

[0017] In laboratory tests, the basalt fabric reinforced polymers of Examples 1 and 2 showed similar mechanical wear / abrasion resistance, generally 15% less frictional resistance when compared to comparable glass blades used as doctor blades %, the doctor blade runs on a dry steel roll, rotating at a speed of 1000 m / min or 668 rpm, set at an angle of 25° under a load of 0.178 kg / cm (1 pli).

[001...

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PUM

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Abstract

A planar element is disclosed for use in a papermaking machine. The planar element includes a composite of multiple layers, with at least some of the layers including resin impregnated fabrics including basalt fibers.

Description

[0001] priority [0002] This application claims priority to US Provisional Patent Application Serial No. 60 / 715,309, filed September 8,2005. technical field [0003] The present invention generally relates to planar elements used in papermaking machines. As used herein, the term "planar element" is intended to include doctor blades, creping blades, top plates in blade holders, and wear surfaces on thin blades. Background technique [0004] To clean or remove sheets, doctor blades are brought into contact with the surface of rolls on papermaking and web processing machines. [0005] Composite doctor blades consist of a fabric substrate held together with a polymeric resin, and the combination of substrate and resin provides the desired scraping properties. Synthetic doctor blades are usually made of glass, cotton or carbon reinforced fabrics held together with thermoplastic or thermosetting resins. Different reinforcing fabrics impart different performance properties to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21G3/00
CPCB29C70/12B29K2709/00D21G3/005B29C70/228
Inventor M·德拉伯J·詹姆斯J·罗泽哈姆
Owner 卡当特网络系统股份有限公司