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Method of separating colouring agents from recycled fibre material

A technology for recycling fibers and colorants, which is applied in the fields of raw material separation, fiber raw material processing, paper recycling, etc. It can solve the problems of loss of fiber materials, reduction of pulp whiteness, difficult separation of colorants, etc., and achieve the effect of avoiding excessive decomposition

Inactive Publication Date: 2006-12-13
MEGATREX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem with the prior art is that the colorants are very difficult to separate from the fibers, which makes the resulting pulp less white in fiber disintegration
[0005] Another disadvantage of the prior art is that there is considerable loss of fibrous material in the flotation process in which printing inks and other impurities are removed from the actual pulp

Method used

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  • Method of separating colouring agents from recycled fibre material
  • Method of separating colouring agents from recycled fibre material
  • Method of separating colouring agents from recycled fibre material

Examples

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Embodiment Construction

[0012] figure 1 is a longitudinal section of a double-acting impact mill 20 used in the method of the invention, comprising a housing 10 in which is arranged a rotor 11 having impact surfaces 1a, 1b..., 3a, 3b...etc. figure 2 The individual impact surfaces are given in detail. A second rotor 12 coaxial with the first rotor 11 is also arranged in the casing. The second rotor 12 also has impact surfaces 2a, 2b..., 4a, 4b...etc. The impact surfaces 1a, 1b, . . . , 2a, 2b, . The rings 1 , 3 , 5 of the first rotor 11 and the rings 2 , 4 of the second rotor 12 overlap each other. This enables the rotors 11 and 12 and their impact surfaces to freely rotate coaxially in different directions.

[0013] The housing ends with a hole 14 leading to the center of the rotors 11 and 12, the hole 14 being the feed port for the pre-shredded recycled fibrous material. The wall of the housing has an opening 15, which is the discharge opening, tangentially towards the outermost impact surface...

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Abstract

The invention relates to a method of separating colouring agents, particularly printing ink, from recycled fibre material, in which method the recycled fibre material is defibered using a liquid, so that colouring agent is separated from the recycled fibre during the defibration. In the method, the pre-kneaded recycled fibre is applied to a double-action impact mill, where it is subjected to successive impacts, so that the treatment time is at most some seconds.

Description

technical field [0001] The present invention relates to a method for separating colorant, especially printing ink, from recycled fiber material, wherein the recycled fiber material containing colorant is dissociated into fibers with a liquid, especially water containing chemical additives, so that the recycled fiber material contained in the recycled fiber The colorants in the material are separated from the recycled fibers during the fiber disintegration process. Background technique [0002] Recycled fiber materials often contain various prints and other materials that contain colorants (printing inks or toners) that are attached to the recycled fiber materials. When processing these recycled fiber materials, on the one hand they must be dissociated into fibers, and on the other hand, colorants, various fillers, waxes and adhesives which prevent the recycled fibers from being reused must be separated from them in order to be removed later. These colorants are added to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21B1/32D21B1/34D21C5/02D21D1/34
CPCD21D1/34D21B1/32Y02W30/64
Inventor C-O·帕尔姆H·维尔塔恩E·皮尔蒂宁
Owner MEGATREX
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