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Insulating paperboard production method capable of improving interlayer bonding capacity

An insulating paperboard and bonding ability technology, applied in pulp beating/refining methods, insulators, organic insulators, etc., can solve problems such as interlayer or end cracking, and achieve improved wire separation, good dispersion, and stable product quality Effect

Active Publication Date: 2021-11-09
WEIFANG HUISHENG INSULATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to provide a production method of insulating cardboard that improves the bonding ability between layers, effectively solving the problem of interlayer or end commonly existing in current products. The problem of internal cracking is improved, and the processing performance of the product is improved, thereby stabilizing the product quality

Method used

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  • Insulating paperboard production method capable of improving interlayer bonding capacity
  • Insulating paperboard production method capable of improving interlayer bonding capacity
  • Insulating paperboard production method capable of improving interlayer bonding capacity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment one: Production of 3.0mm insulating cardboard

[0058] a. Beating: use imported unbleached kraft softwood pulp (70% Swedish Asba electronic-grade wood pulp+30% Canadian Prince George electronic-grade wood pulp) as raw material, then add white water (the weight percentage added is 94.5% for crushing) Pulp, the rest of the water is added during refining) for beating, disintegrate with a pulper, and form a slurry suitable for papermaking through the cutting, extrusion, rubbing and friction of the refiner;

[0059] b. Paper forming: transport the prepared pulp in step a to the wet-sheet forming process for paper forming, adjust the appropriate pulp-to-net speed ratio (1.02~1.08), and the vertical and horizontal tension difference is small (≤1.5:1); adjust Wet paper page banner hanging amount, the deviation of the banner hanging amount is controlled at ±1.5%, and the banner hanging amount on both sides is a positive deviation, the paper thickness deviation mm (m...

Embodiment 2

[0063] Embodiment two: Production of 4.0mm insulating cardboard

[0064] a. Beating: use imported unbleached kraft softwood pulp (70% Swedish Asba electronic-grade wood pulp+30% Canadian Prince George electronic-grade wood pulp) as raw material, then add white water (the weight percentage added is 94.5% for crushing) Pulp, the rest of the water is added during refining) for beating, disintegrate with a pulper, and form a slurry suitable for papermaking through the cutting, extrusion, rubbing and friction of the refiner;

[0065] b. Paper molding: transport the pulp prepared in step a to the wet sheet forming process for paper molding, adjust the appropriate pulp-to-net speed ratio (1.02~1.08), and the vertical and horizontal tension difference is small (≤1.4:1); adjust Wet paper page banner hanging amount, the deviation of banner hanging amount is controlled at ±1.5%, and the banner hanging amount on both sides is a positive deviation, the paper thickness deviation mm (maxim...

Embodiment 3

[0069] Embodiment three: Production of 5.0mm insulating cardboard

[0070] a. Beating: use imported unbleached kraft softwood pulp (70% Swedish Asba electronic-grade wood pulp+30% Canadian Prince George electronic-grade wood pulp) as raw material, then add white water (the weight percentage added is 94.5% for crushing) Pulp, the rest of the water is added during refining) for beating, disintegrate with a pulper, and form a slurry suitable for papermaking through the cutting, extrusion, rubbing and friction of the refiner;

[0071] b. Paper forming: transport the pulp prepared in step a to the wet-sheet forming process for paper forming, adjust the appropriate pulp-net speed ratio (1.02~1.08), and the vertical and horizontal tension difference is small (≤1.3:1); adjust Wet paper page banner hanging amount, the deviation of the banner hanging amount is controlled at ± 1.5%, and the banner hanging amount on both sides is a positive deviation, the paper thickness deviation mm (m...

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Abstract

The invention discloses an insulating paperboard production method capable of improving interlayer bonding capacity; which comprises the following steps: by adopting a one-time pulping mode, cutting, extruding, rubbing and rubbing by a pulping machine provided with a double-blocking abrasive disc to obtain pulp, and then dewatering on a net on a super-forming part to obtain a wet paperboard with uniform banner pulp hanging amount; and then allowing the wet paperboard to be subjected to first-stage pressurization and third-stage depressurization, cooling and standing, and finally obtaining the productthrough slitting according to requirements. According to the production method, the problem that in the prior art, interlayer or end cracking is generated when an insulating part product is processed by an insulating paperboard with the thickness of 3.0 mm or above can be solved, the processing performance of the product is improved, and therefore the quality of the product is stabilized.

Description

technical field [0001] The invention belongs to the technical field of insulating cardboard production, and in particular relates to an insulating cardboard production method for improving interlayer bonding ability. Background technique [0002] Insulating paperboard has the characteristics of high density, good mechanical strength, high electrical strength and small compression coefficient. It is an excellent solid insulating material and is widely used in transformers, reactors, transformers and other power transmission and transformation equipment, especially UHV Insulating parts of type transformers, such as paper tubes, screens, pads, stays, end rings and other insulating materials. [0003] At present, the production of insulating paperboard is to use imported unbleached kraft softwood pulp as raw material, disintegrate it with a pulper, and undergo repeated cutting, extrusion, kneading and friction of the refiner to form a pulp suitable for papermaking. material; th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F11/00D21H27/12D21H11/04D21D1/30H01B3/52
CPCD21F11/00D21H11/04D21D1/30D21D1/306H01B3/52
Inventor 朱军李逢祥
Owner WEIFANG HUISHENG INSULATION TECH
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