Preparation method for improving ring pressure strength of low-gram-weight T paper board

A technology of ring crush strength and low gram weight, applied in the field of T cardboard, can solve the problems of lack of market competitiveness of products, increase of waste water pollution load, rising production cost, etc., to improve starch sizing effect, improve ring crush strength, improve The effect of strength indicators

Inactive Publication Date: 2019-06-04
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the above effects are not very satisfactory. Although the ring compressive strength of T cardboard has been improved, the production cost has increased, the waste water pollution load has increased, the enterprise benefit has decreased, and the product lacks market competitiveness.

Method used

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  • Preparation method for improving ring pressure strength of low-gram-weight T paper board
  • Preparation method for improving ring pressure strength of low-gram-weight T paper board
  • Preparation method for improving ring pressure strength of low-gram-weight T paper board

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Effect test

preparation example Construction

[0023] The preparation method of the present invention comprises the following steps:

[0024] Step 1, raw material selection: use corrugated paper and offset printing book paper as raw materials;

[0025] Step 2, slurry preparation: After weighing the corrugated paper and offset printing book paper in proportion, send them to a high-consistency hydraulic pulper, add water to dilute to a concentration of 8% to 12%, and disintegrate for 20min to 25min at a temperature of 60°C to 70°C, dilute the disintegrated fine pulp with water to a concentration of 3% to 5% and put it into the fine pulp tank. After the coarse pulp is removed by a hydraulic cleaning machine and a cylindrical sieve, it is sent to the good pulp tank for storage. ;After stirring the slurry in the good pulp tank, pump it to the high-concentration slag remover and coarse screen to remove light and heavy impurities of fiber, and classify the slurry into two types: long fiber pulp and short fiber pulp through the fi...

Embodiment 1

[0030] Embodiment 1, quantification is 80g / m 2 The product:

[0031] The first product A1, the raw material is corrugated paper and offset printing book paper, the ratio is 70%: 30%, after mixing, long fiber and short fiber pulp are obtained, and the ratio is 70%: 30%, and the surface sizing agent is tapioca starch 6%. , starch converting enzyme 0.1%;

[0032] The second product A2, the raw material is corrugated paper and offset printing book paper, the ratio is 75%: 25%, long fiber and short fiber pulp are obtained after mixing, the ratio is 70%: 30%, and the surface sizing agent tapioca starch is 8% , starch converting enzyme 0.2%;

[0033] The third product A3, the raw material is corrugated paper and offset printing book paper, the ratio is 78%: 22%, after mixing, long fiber and short fiber pulp are obtained, and the ratio is 80%: 20%, and the surface sizing agent tapioca starch is 6% , starch converting enzyme 0.1%;

[0034] The fourth product A4, the raw material is...

Embodiment 2

[0038] Embodiment 2, quantification is 90g / m 2 Products B1, B2, B3 and B4:

[0039] The first product B1, the raw material is corrugated paper and offset printing book paper, the ratio is 70%: 30%, after mixing, long fiber and short fiber pulp are obtained, and the ratio is 70%: 30%, and the surface sizing agent is 6% tapioca starch , starch converting enzyme 0.1%;

[0040] The second product B2, the raw material is corrugated paper and offset printing book paper, the ratio is 75%: 25%, after mixing, long fiber and short fiber pulp are obtained, and the ratio is 70%: 30%, and the surface sizing agent tapioca starch is 8% , starch converting enzyme 0.2%;

[0041] The third product B3, the raw material is corrugated paper and offset printing book paper, the ratio is 78%: 22%, after mixing, long fiber and short fiber pulp are obtained, and the ratio is 80%: 20%, and the surface sizing agent tapioca starch is 6% , starch converting enzyme 0.1%;

[0042] The fourth product B4, ...

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Abstract

The invention discloses a preparation method for improving the ring pressure strength of a low-gram-weight T paper board, and the preparation method comprises the following four steps: (1) selecting raw materials, namely taking corrugated paper and offset printing periodical paper as raw materials; (2) preparing slurry, to be more specific, mixing the two raw materials obtained in the step (1) according to a ratio, carrying out crushing, impurity removal, fiber grading, heat dispersion and concentration treatment, and respectively storing long fiber slurry and short fiber slurry in respectiveslurry pools for later use; (3) preparing pulp, to be more specific, preparing surface layer pulp and bottom-layer pulp according to the proportions from the long fiber slurry and the short fiber slurry obtained in the step (2); and (4) making the T paper board, to be more specific, respectively allowing the surface layer pulp and the bottom-layer pulp obtained in the step (3) to pass through a fan pump and a pressure screen, then be conveyed to a surface layer and bottom layer pulp box pulp feeding total pipe for being loaded onto a net for forming, then enter a pressing part, a front and a rear drying part, surface sizing, a calender and the like for treatment after vacuum dewatering by a net part, and enter a winding machine, a rewinding machine and a packaging machine to obtain the low-gram-weight T paper board.

Description

technical field [0001] The invention relates to T cardboard, in particular to a preparation method for improving the ring compressive strength of low-weight T cardboard. Background technique [0002] T cardboard is a kind of packaging paper between boxboard and corrugated base paper. It is used to manufacture various high-end cartons or cartons for packaging. Due to the light weight of the paper, low cost and good cushioning properties, Easy to pack for shipping and protect the contents inside. [0003] Ordinary corrugated base paper uses 100% corrugated carton as raw material. Although the cost is low, the fiber quality is poor; in order to save costs, fiber classification and thermal dispersion treatment technologies are rarely used, and only sizing agents and wet strength agents are added to the pulp. The bonding strength of the paper causes the tightness of the paper to be too large and the bulk to decrease, which has a great influence on the stiffness of the paper, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/14D21H21/16D21H17/00D21H17/28D21F11/12
Inventor 陈务平任浩
Owner NANJING FORESTRY UNIV
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