Core layer pulp for packaging paperboard, and packaging paperboard

A packaging cardboard and core layer technology, applied in the field of papermaking, can solve problems such as poor strength, and achieve the effects of high strength, high stiffness, and improved interweaving ability

Inactive Publication Date: 2020-05-12
NINGBO ASIA PULP & PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The selection of BCTMP pulp is based on the characteristics of different cardboard products, and BCTMP pulp with different bulk and tensile strength is selected as raw material, but the higher the bulk of BCTMP pulp, the worse the strength must be, which limits the use of BCTMP in cardboard. Unlimited high percentage applications

Method used

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  • Core layer pulp for packaging paperboard, and packaging paperboard
  • Core layer pulp for packaging paperboard, and packaging paperboard
  • Core layer pulp for packaging paperboard, and packaging paperboard

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Embodiment Construction

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0018] An embodiment of the present application provides a core layer pulp for packaging cardboard, the core layer pulp includes bleached chemical thermomechanical pulp (BCTMP), and the bleached chemical thermomechanical pulp includes coniferous mechanical pulp. The dry mass percentage of the chemithermomechanical pulp is 25%-30%.

[0019] The core layer slurry of the present application is added with coniferous mechanical pulp. The fiber length o...

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Abstract

The invention discloses a core layer pulp for a packaging paperboard. The core layer pulp comprises a bleached chemical thermo-mechanical pulp which comprises a needle leaf mechanical pulp with an absolute dry mass accounting for 25%-30% of the absolute dry mass of the bleached chemical thermo-mechanical pulp. The core layer pump provided by the invention has the following advantages: through addition of the needle leaf mechanical pulp which has long fiber length and good tensile strength, the needle leaf mechanical pulp has the characteristics of high bulk and high stiffness; the bleached chemical thermo-mechanical pulp added with 25%-30% of the needle leaf mechanical pulp has high bulk and strength; meanwhile, the core layer pulp containing the bleached chemical thermo-mechanical pulp improves the interweaving capability of core layer fibers and increases the Z-direction (thickness direction) strength of a core layer; a paperboard prepared from the core layer pump has the characteristics of high bulk, high strength and stiffness; and thus, the core layer pulp provided by the invention can be used for manufacturing core layers of packaging paperboards like ivory boards and food paperboards, and is specifically applicable to the field of middle-grade and high-grade food packaging paperboards.

Description

technical field [0001] The application belongs to the technical field of papermaking, and in particular relates to the core layer slurry for packaging cardboard and the packaging cardboard. Background technique [0002] In the production process of the existing ordinary white cardboard, food cardboard and other packaging boards, a large amount of bleached chemical thermomechanical pulp (BCTMP) will be used to ensure the high bulk and high stiffness of the paper. The selection of BCTMP pulp is based on the characteristics of different cardboard products, and BCTMP pulp with different bulk and tensile strength is selected as raw material, but the higher the bulk of BCTMP pulp, the worse the strength must be, which limits the use of BCTMP in cardboard. Unlimited high percentage applications. Therefore, how to develop high-strength, high-bulk pulp will be a revolutionary technological innovation in terms of cost and quality advantages for the production of ordinary white cardbo...

Claims

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Application Information

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IPC IPC(8): D21H27/10D21H11/02D21H21/18D21H17/29D21H11/14D21H11/04B65D65/38
CPCB65D65/38B65D2565/384D21H11/02D21H11/04D21H11/14D21H17/29D21H21/18D21H27/10Y02W90/10Y02A40/90
Inventor 朱国忠田维实王俊明周雪林仇如全刘继春
Owner NINGBO ASIA PULP & PAPER
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