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A method for adjusting the warpage of coated white cardboard

An adjustment method, the technology of cloth white cardboard, applied in the field of warpage adjustment of coated white cardboard, can solve the problems of paper and warpage that cannot be fundamentally solved, and achieve good economic benefits, good mechanical properties, and good film-forming performance Effect

Active Publication Date: 2016-04-06
ZHUHAI S E Z HONGTA RENHENG PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, various measures taken by various manufacturers to solve the warping problem, such as adjusting the degree of beating of the pulp, adjusting the tension of the dry net, and using a humidification box, etc., are all compensatory adjustments, which will not change the direction of the paper fiber arrangement, and cannot fundamentally solve the paper warping question

Method used

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  • A method for adjusting the warpage of coated white cardboard
  • A method for adjusting the warpage of coated white cardboard
  • A method for adjusting the warpage of coated white cardboard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Use the following steps for warpage adjustment and production of coated white cardboard:

[0046]1. Cut 10 A4 samples at average intervals on the paper machine banner paper, ensuring that the long side of the A4 samples is parallel to the direction of the paper machine, and then cut out a small cigarette label for each A4 sample, and press the 10 small cigarette labels Mark the sequence number from the operating side (TS) to the driving side (DS), put the reverse side up into the oven, put the 10 small cigarette labels after drying with the front side up, the paper machine direction of the cigarette labels is parallel to the visual direction, press the operation The side (TS) to the transmission side (DS) are arranged in sequence, and the fiber arrangement direction is drawn according to the principle that the fiber arrangement direction is perpendicular to the warping direction;

[0047] 2. It is found that the fiber arrangement directions drawn in step 1 are all in th...

Embodiment 2

[0051] Use the following steps for warpage adjustment and production of coated white cardboard:

[0052] 1. Cut 10 A4 samples at average intervals on the paper machine banner paper, ensuring that the long side of the A4 samples is parallel to the direction of the paper machine, and then cut out a small cigarette label for each A4 sample, and press the 10 small cigarette labels Mark the sequence number from the operating side (TS) to the driving side (DS), put the reverse side up into the oven, put the 10 small cigarette labels after drying with the front side up, the paper machine direction of the cigarette labels is parallel to the visual direction, press the operation The side (TS) to the transmission side (DS) are arranged in sequence, according to the principle that the fiber arrangement direction is perpendicular to the warping direction, such as image 3 Shown, draw the fiber arrangement direction, image 3 The oblique line of indicates the direction of fiber arrangemen...

Embodiment 3

[0059] Use the following steps for warpage adjustment and production of coated white cardboard:

[0060] 1. Cut 15 A4 samples at average intervals on the banner paper of the paper machine, make sure that the long side of the A4 samples is parallel to the direction of the paper machine, and then cut out 1 small cigarette label for each A4 sample, and press the Mark the sequence number from the operating side (TS) to the driving side (DS), put the reverse side up into the oven, put the 15 small cigarette labels after drying with the front side up, the paper machine direction of the cigarette labels is parallel to the visual direction, press the operation The side (TS) to the transmission side (DS) are arranged in sequence, according to the principle that the fiber arrangement direction is perpendicular to the warping direction, such as image 3 Shown, draw the fiber arrangement direction, image 3 The oblique line of indicates the direction of fiber arrangement, and the directi...

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Abstract

The invention discloses a method for adjusting the warpage of coated white cardboard, specifically: (1) determining the fiber arrangement direction; (2) adjusting the headbox according to the fiber arrangement direction: 1) if the fiber arrangement directions are all biased towards the same In one direction, adjust the balance pipe of the headbox; 2) If the fiber arrangement direction is splayed, adjust the headbox lip anti-deviation system; 3) If the fiber arrangement direction is not regular, adjust the headbox lip Fine-tuning mechanism; (3) Add PVA additives with 10-30% starch weight to the back-coated starch of coated white cardboard. The present invention analyzes the root causes of positive warping and diagonal warping in the production process of coated white cardboard, explores and summarizes the production practice, eliminates the main influencing factors of paper warping from the source, and obtains the most The method for directly and most effectively solving the adjustment method of straight warping and diagonal warping in the production process of white cardboard can directly improve the qualified rate of products and has good economic benefits.

Description

technical field [0001] The invention belongs to the technical field of coated white cardboard production, in particular to a method for adjusting the warpage of coated white cardboard. Background technique [0002] In the production process of coated white cardboard, paper warping is a common quality problem, and the most common ones are positive warping and diagonal warping, such as figure 1 As shown, from left to right are vertical warping, horizontal warping, and diagonal warping. Paper warping will cause the product to fail to meet customer needs and produce waste. [0003] Coated white cardboard is coated with a layer of paint on the surface layer. The main components of the paint are pigments and adhesives, which are well bonded to the fibers of the paper surface layer and have a curing effect. Therefore, the surface layer fibers change in humidity. At the same time, the coating layer also acts as a barrier to the surface layer fibers and ambient water vapor, reducing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21F1/36D21F11/04D21H19/14D21H19/84D21H19/20
CPCD21F1/36D21F11/04D21H19/14D21H19/20D21H19/84
Inventor 季向东吴义荣颜凌燕张东生杨正伟刘向前王小龙
Owner ZHUHAI S E Z HONGTA RENHENG PAPER
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