Liquid packaging body paper board and preparation method thereof

A liquid and cardboard technology, applied in the field of liquid packaging raw cardboard and its preparation, can solve the problems of poor fiber bonding strength, high basis weight, and high pressure on fiber environmental protection.

Inactive Publication Date: 2014-05-21
ASIA SYMBOL SHANDONG PULP & PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Since the pulp of the original paperboard of the existing packaging materials is mostly composed of dried chemical-mechanical wood pulp and bleached chemical wood pulp, and the fiber bonding strength after drying is not good, in order to maintain the stiffness and strength of the orig

Method used

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preparation example Construction

[0042] The present invention also provides a preparation method of the above-mentioned liquid packaging raw cardboard, comprising the following steps:

[0043] After mixing 80-100wt% of unbleached kraft pulp and 0-20wt% of undried chemical broad-leaved fresh pulp, it is passed into the bottom headbox of the stacked wire paper machine;

[0044] After mixing 10-20wt% of undried chemical broad-leaved fresh pulp, 50-80wt% of unbleached kraft pulp and 5-30wt% of mechanical pulp, it is passed into the core layer headbox of the stacked wire paper machine;

[0045] After mixing 20-80wt% of undried chemical broad-leaved fresh pulp and 20-80wt% of chemical soft-leaved pulp, it is passed into the surface headbox of the stacked wire paper machine;

[0046] The base paper with the bottom paper layer, the core paper layer and the face paper layer is obtained by forming the three layers of the web by the stacking paper machine;

[0047] After drying the base paper for the first time, coatin...

Embodiment 1

[0053] The basis weight of the face paper layer is 42g / m 2 , using 50wt% undried chemically bleached broadleaf fresh pulp and 50wt% chemically bleached softwood pulp board; the basis weight of the core paper layer is 115g / m 2 , using 10wt% undried chemically bleached broadleaf fresh pulp, 70wt% unbleached kraft softwood pulp board and 20wt% chemical mechanical pulp board; the basis weight of the bottom paper layer is 21g / m 2 , using 100wt% unbleached sulphate soft-leaf pulp; the above-mentioned pulp sheets are respectively disintegrated by a pulper, mixed with the above-mentioned components, screened, and beaten by a refiner, and mixed with the fresh pulp from the pulping line in the mixing tank. After mixing, it enters the surface layer headbox, core layer headbox and bottom headbox of the stacking paper machine respectively, and then is formed by three layers of the stacking paper machine to obtain a surface paper layer, a core paper layer and a bottom layer. The base paper...

Embodiment 2

[0057] The basis weight of the face paper layer is 42g / m 2 , using 50wt% undried chemically bleached broadleaf fresh pulp and 50wt% chemically bleached softwood pulp board; the basis weight of the core paper layer is 115g / m 2 , using 10wt% undried chemically bleached broadleaf fresh pulp, 70wt% unbleached kraft softwood pulp board and 20wt% chemical mechanical pulp board; the basis weight of the bottom paper layer is 21g / m 2 , using 100wt% unbleached sulphate soft-leaf pulp; the above-mentioned pulp sheets are respectively disintegrated by a pulper, mixed with the above-mentioned components, screened, and beaten by a refiner, and mixed with the fresh pulp from the pulping line in the mixing tank. After mixing, it enters the surface layer headbox, core layer headbox and bottom headbox of the stacking paper machine respectively, and then is formed by three layers of the stacking paper machine to obtain a surface paper layer, a core paper layer and a bottom layer. The base paper...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention provides a liquid packaging body paper board and a preparation method thereof. The liquid packaging body paper board consists of a backing paper layer, a core paper layer, a surface paper layer and a coating layer which are stacked in sequence, wherein the backing paper layer is prepared from the following raw materials in percentage by weight: 80-100 percent of unbleached sulfate pulp and 0-20 percent of non-dried chemical broad-leaf fresh pulp; the core paper layer is prepared from the following raw materials in percentage by weight: 10-20 percent of non-dried chemical broad-leaf fresh pulp, 50-80 percent of unbleached sulfate pulp and 5-30 percent of mechanical pulp; the surface paper layer is prepared from the following raw materials in percentage by weight: 20-80 percent of non-dried chemical broad-leaf fresh pulp and 20-80 percent of chemical needle-leaf pulp. Compared with the prior art, the liquid packaging body paper board has the advantages that the non-dried chemical broad-leaf fresh pulp is added into paper pulp of the backing paper layer, the core paper layer and the surface paper layer, and due to the specific high intensity and high stiffness as well as the high fiber bonding strength of the non-dried fresh pulp, the stiffness and the intensity of the liquid packaging body paper board are improved under a condition that the amount is fixed and is not increased; the liquid packaging body paper board has less-damage performance.

Description

technical field [0001] The invention belongs to the technical field of flexible packaging paper, and in particular relates to a liquid packaging raw cardboard and a preparation method thereof. Background technique [0002] With the progress of society, the continuous improvement of people's living standards, the continuous updating of the consumption concept of the masses, and the massive environmental protection movement on a global scale, the demand for flexible packaging with less materials, low waste, and easy recycling is increasing. , The development of the flexible packaging industry will inevitably demand more packaging raw cardboard. At present, most of my country's liquid packaging raw cardboard still relies on imports. Therefore, further research and exploration of the production of liquid packaging raw cardboard will enable my country to produce its own liquid packaging raw cardboard. It is an important issue faced by the domestic paper industry. [0003] The liqu...

Claims

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Application Information

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IPC IPC(8): D21H11/10D21H27/30B32B29/00D21F11/00
Inventor 周雪林汤惠民张瑞铧邱福泰
Owner ASIA SYMBOL SHANDONG PULP & PAPER
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