A kind of packaging paper for cold chain liquid and its production process

Abstract

The invention discloses a wrapping paper for cold chain liquids, which includes base paper and a water-resistant and lactic acid-resistant sizing material arranged on the base paper. The base paper includes a surface layer, a lining layer, a core layer and a bottom layer; the surface layer and The slurry ratio of the bottom layer is: 15~30% coniferous leaves and 85~70% broadleaf; the slurry ratio of the lining layer and core layer is 10~25% coniferous leaves and 90~75% self-made chemical mechanical pulp The water-resistant and lactic-acid-resistant sizing layer includes a sizing material in the pulp and a sizing material on the surface; the production process of the wrapping paper is: the base paper is produced by the paper machine, and the sizing material in the pulp is added during the production of the base paper. Internal sizing of the paddle; after the production of base paper is completed, double-sided sizing inside the machine and sizing outside the machine are carried out in sequence to complete the production of base paper. The cold chain liquid packaging paper and its production process of the present invention produce a cold chain liquid packaging paper with fine and smooth paper surface, comfortable hand feeling, clear and realistic printing pattern, thick paper, and the whole production process is safe, green and environmentally friendly.

Description

technical field [0001] The invention relates to a wrapping paper and its production process, in particular to a cold chain liquid wrapping paper and its production process, and belongs to the technical field of liquid wrapping paper. Background technique [0002] Domestic liquid-wrapped paper is mostly used for boxed yogurt. One side of the paper is tinned and the other side is printed. The tinned layer is dense and thick, so the requirements for water resistance and lactic acid resistance of the base paper are slightly lower; The index requirements are relatively low, and the requirements for the clarity of the printing surface are not high, so the requirements for the roughness of the printing surface of the base paper are low; It is stored at room temperature for several months, and the humidity of the storage environment changes greatly. This has extremely high requirements for the paper's ability to resist liquid penetration; The fidelity is higher, so the fineness of ...

AI Technical Summary

Problems solved by technology

[0002] Domestic liquid-wrapped paper is mostly used for boxed yogurt. One side of the paper is tinned and the other side is printed. The tinned layer is dense and thick, so the requirements for water resistance and lactic acid resistance of the base paper are slightly lower; The index requirements are relatively low, and the requirements for the clarity of the printing surface are not high, so the requirements for the roughness of the printing surface of the base paper are low; It is stored at room temperature for several months, and the humidity of the storage environment changes greatly. This has extremely high requirements for the paper's ability to resist liquid penetration; The fidelity is higher, so the fineness of the paper surface is extremely high, and the paper index is reflected in the smoothness as high as possible and the roughness as low as possible; the yogurt cup is thinner than the disposable water cup, and the cup body is straight Hard, which requires high paper bulk and stiffness; in the existing technology, domestic batch production is rarely possible, mainly relying on imports from the United States

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