Preparation method of dark-streak anti-counterfeiting paperboard

A dark-grain, paperboard technology, applied in the field of preparation of dark-grain anti-counterfeit paperboard, can solve problems such as poor dispersion, adverse effects on production, and huge equipment investment, and achieve the effects of high strength, increased production costs, and concealed distinguishability

Active Publication Date: 2020-03-24
ASIA SYMBOL SHANDONG PULP & PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, fluorescent fibers or colored fibers are mostly synthetic fibers, which have poor dispersion and are likely to have an adverse effect on production; while the addition of unbleached fibers requires a long time in the production of switching between conventional paper types, resulting

Method used

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  • Preparation method of dark-streak anti-counterfeiting paperboard
  • Preparation method of dark-streak anti-counterfeiting paperboard
  • Preparation method of dark-streak anti-counterfeiting paperboard

Examples

Experimental program
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Example Embodiment

[0025] The invention provides a method for preparing an obscured anti-counterfeiting paperboard, which comprises: preliminary dehydration of the slurry through a forming plate, and then dehydration treatment through a forming net under vacuum, and then pressing and drying to obtain an obscured anti-counterfeiting paperboard; During the dehydration treatment of the forming wire, the speed difference of the bottom slurry web is -5-20m / min; and the forming wire is provided with an obscure structure.

[0026] See figure 1 versus figure 2 , figure 1 It is a schematic diagram of the structure of the dark-grain anti-counterfeiting cardboard prepared by the present invention; figure 2 It is a schematic diagram of the preparation process of the obscured anti-counterfeiting cardboard provided by the present invention.

[0027] The present invention has no special restrictions on the source of all raw materials, as long as they are commercially available.

[0028] Wherein, the pulp preferably...

Example Embodiment

[0038] Example 1

[0039] Such as figure 2 As shown in the schematic diagram of the cardboard preparation process, softwood bleached chemical pulp, hardwood bleached chemical pulp, softwood bleached thermomechanical pulp, and hardwood bleached thermomechanical pulp are respectively processed for pulping, refining and pulping. Among them, the proportion of softwood bleached chemical pulp is 8%, the proportion of hardwood bleached chemical pulp is 55%, the proportion of softwood bleached thermomechanical pulp is 9%, and the proportion of hardwood bleached thermomechanical pulp is 28%.

[0040] The mixed slurry is screened, slagging, degassed, diluted, and then pumped to the headbox on the surface and the bottom of the core. The mass concentration of the three layers of slurry after dilution is 0.3% and 1.0% respectively. , 0.3%; the natural dehydration effect formed at the forming plate due to its own speed and downward gravity after the slurry is sprayed through the headbox. At thi...

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Abstract

The invention provides a preparation method of a dark-streak anti-counterfeiting paperboard. The preparation method comprises the following steps: primarily dehydrating pulp through a forming plate, then performing dehydrating through a forming net under vacuum, and carrying out squeezing and drying to obtain the dark-streak anti-counterfeiting paperboard, wherein a bottom-layer pulp net speed difference is in a range of -5 to -20 m/min during dehydration treatment of the forming net, and the forming net is provided with a dark streak structure. Compared with the prior art, the invention has the following advantages: in the dehydration forming process, the forming net provided with dark streaks is adopted for dehydration treatment, so fibers are regularly distributed according to the darkstreaks, and therefore, the surface of a paper web has a partly-hidden and partly-visible dark streak effect; an anti-counterfeiting mark is high in concealment and distinguishability, and additionalequipment is not needed for identification; the preparation method only needs to adopt conventional processes and equipment, so production cost is not increased, paper is not damaged at all, and continuous use is not affected; and the dark-streak anti-counterfeiting paperboard has the same advantages of high strength, easy degradability, repeated usability and the like as common paper.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to a preparation method of dark pattern anti-counterfeiting cardboard. Background technique [0002] With the adjustment of the economic structure at the national level, the extensive business model of my country's manufacturing industry has come to an inflection point, and various industries have been under the pressure of "transformation and upgrading" to varying degrees. As one of the traditional pillar industries, the paper industry is also facing the pressure of improvement, perfection and continuous innovation. At the same time, the personalized demand of downstream customers for raw paper has also forced the paper industry to transform and upgrade, including the realization of personalized production for different customers. [0003] Adding personalized anti-counterfeiting marks on ordinary paper products is a development direction with great potential. At p...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21H11/02D21H11/08D21H19/84D21H19/38D21H19/40D21H19/44D21H19/54D21H19/10D21H17/28B42D25/40
CPCB42D25/40D21H11/02D21H11/08D21H17/28D21H17/38D21H19/10D21H19/385D21H19/40D21H19/44D21H19/54D21H19/84D21H27/00
Inventor 钱凯锋张克庆王晶晶丁鹏翔
Owner ASIA SYMBOL SHANDONG PULP & PAPER
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