Raw paper for thermal transfer paper and preparation process thereof

Abstract

The invention provides raw paper for thermal transfer paper and a preparation process thereof. The raw paper for the thermal transfer paper has grammage of 70 to 95 g / m2, cross file grammage tolerance of no more than 5 g / m2, apparent density of 0.8 to 0.85 g / cm3, smoothness of 45 / 36S, transverse tearability of no less than 600 mN, vertical dry tensile strength of no less than 70 N / 15mm, vertical wet tensile strength of no less than 12 N / 15 mm, air permeability of no less than 60 S, a water absorption value of 30 to 50 g / m2, a deformation rate of no more than 1.5% and dust of no more than 10 / m2. The preparation process for the raw paper for the thermal transfer paper comprises the steps consisting of pulping, mixing, beating and rewinding so as to prepare the raw paper for the thermal transfer paper, and then packaging is carried out, wherein a surface sizing solution and a filling material are added during beating. The raw paper for the thermal transfer paper prepared in the invention has the advantages of low cost, good paper formation, great apparent density, small air permeability, high tensile strength, high heat resistance, etc.

Description

Technical field [0001] The invention relates to the technical field of papermaking, in particular to a thermal transfer paper base paper and a preparation process thereof. Background technique [0002] Thermal transfer is an emerging printing process, imported from abroad. Thermal transfer is also called sublimation. It uses thermal transfer ink to print any pictures of portraits, landscapes, etc. on thermal transfer paper, and then heat the paper to a certain temperature within a few minutes by the corresponding thermal transfer equipment. A special process in which the color of the image on it is realistically transferred to porcelain cups, porcelain plates, porcelain plates, clothes, metals and other materials. Thermal transfer paper is the carrier of transferring images, and it is very important for the vividness and vividness of the image after transfer. [0003] According to different transfer objects, the requirements for transfer paper are also different, which can be rou...

AI Technical Summary

Problems solved by technology

[0006] However, the quality of the current thermal transfer paper base paper is poor, which mainly reflects the following points: low tensile strength and heat resistance; large "three differences" and poor uniformity; the base paper cannot meet the requirements of thermal transfer paper. Coating requirements, batch to batch, the quality of the base paper produced between the same batch varies greatly, the quality is uneven, and the stability is poor; the base paper needs to be coated with a special coating, and the ink absorption of the coating is not good 1. The ink drop absorption speed is slow, and the image has obvious ink accumulation and color bleeding after printing; the produced base paper has small tightness and high air permeability, and the absorption of paint is not uniform enough, and the paper surface is wrinkled during printing.

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