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Warping adjustment method adopted in cardboard coating

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

Active Publication Date: 2015-05-13
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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  • Warping adjustment method adopted in cardboard coating
  • Warping adjustment method adopted in cardboard coating
  • Warping adjustment method adopted in cardboard coating

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 warping adjustment method adopted in cardboard coating. The warping adjustment method adopted in cardboard coating specifically comprises the steps of 1 determining fiber arrangement direction; 2 adjusting a pulp fluid box according the fiber arrangement direction, wherein a balance pipe of the pulp fluid box is adjusted if the fiber arrangement direction deviates to the same direction, and a lip plate deviation-preventing system of the pulp fluid box is adjusted if the fiber arrangement direction is splayed; 3 adding 10%-30% by starch weight of PVA assistant into a back-coating starch for cardboard coating. According to the warping adjustment method adopted in cardboard coating, main factors influencing paper warping are thoroughly eliminated by groping and summarizing production practice after primary causes of forward warping and opposite-angle warping in the cardboard coating production process are analyzed, a most direct and effective method for adjusting forward warping and opposite-angle warping in the cardboard coating production process is obtained, the warping adjustment method can be directly used for improving pass rate of products and has good economic benefit.

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, reducin...

Claims

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Application Information

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Patent Type & Authority Applications(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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