SU598998A1 - Substrate paper coating composition for carrier of transferable image - Google Patents

Description

.one. The invention relates to a coating composition of a substrate paper of a temporary carrier of a decal image and is intended for use in pulp and paper industry in the manufacture of special purpose paper used as a single use paper form for transferring an image to finished synthetic fiber piece goods. A known substrate paper of a temporary carrier of a decal with a coating of alginate. Ij. However, when using paper with such a coating, there is insufficient transfer of ink to the receiving surface, which affects the quality of the print. A laminated transfer paper of a temporary carrier of a decal coated with polyvinyl alcohol is known. Polyvinyl alcohol (PVO) coated paper provides a higher transfer of paint on the surface to be treated (86%) compared to coated paper and sodium alginate (82%). The fact that not all paint passes from the coating to the sensing surface is due to the diffusion of paint into the coating. Since the color intensity of the image transferred to the fabric is directly dependent on the amount of ink transferred from the coating, it is necessary to strive for the maximum transfer of ink to the perceiving surface. The aim of the invention is to determine the intensity of the color of the image on the perceiving surface. This is achieved by the fact that the known coating composition of the substrate paper of the temporary carrier of the decal image based on (ADR) additionally contains sodium alginate in the following ratio of components, wt.%: PVA70–90 sodium alginate 10-30 Content of sodium alginate together with polyvinyl alcohol in the specified ratio - contributes to the reduction of paint diffusion, as a result of which, during the transfer process, the separation of paint-to-paint seam is improved and the maximum transfer of paint to the absorbent surface is achieved.

The substrate paper of the temporary transfer media with the coating of the composition proposed is prepared as follows: water is poured into a container equipped with a stirrer. With constant j} OM mixing load PVA. The temperature of the solution is adjusted to 80-90 ° C. Stirring is continued for 1-1.5 hours. Solution concentration 2%. To another tank; equipped with a stirrer and filled with water, sodium alginate is charged. The temperature of the solution is adjusted to 60-7 ° C. Mixing is continued for 1-2 hours. Solution concentration 1.0%. Prepared solutions are poured into the composite container in a certain ratio (according to examples 1,2,3).

Example 1. Pa-based base paper (70% sulphate softwood pulp and 30% sulphate hardwood pulp) applied a coating of 90 wt.% PVA, 10 wt.% Sodium alginate. Coverage weight 5 g / m

Example 2. A coating of the following composition was applied to the base paper: 80% by weight of PVA: 20% by weight of sodium alginate. Coverage weight 2 g / m. EXAMPLE 3. A coating of the following composition is applied onto the base paper; 70 wt.% PVA, 30 wt.% Sodium analginate.

Physico-mechanical properties of papers with the proposed coating are given in table. 1 (wt.%).

Table.

The amount of paint transferred to the sensing surface

As can be seen from the above data, the presence of sodium alginate in the amount of 10-30% in the coating increases the amount of KpaiCKK transferred to the fabric, while other ratios of PVA and alginate in the coating do not only increase the amount of dye.

Absorbability at one-sided 2 wetting -, g / m12

Breaking length, mZZOO

88

89

86

88

transferred to the fabric, but even reduce it.

At the same time, we tested the substrate paper with the proposed composition of the coating for absorbency upon one-sided wetting and breaking length (see Table 2).

Table 2.

14

Claims (2)

11 4100 3400 As can be seen from the above data, the substrate paper with the proposed coating has a one-sided wetting rate less than that of the substrate paper according to the prototype, which means that the ink on the paper1 / substrate with the proposed coating absorbs less (diffuses into coverage) and more fully will move to the sensing surface. In addition, the strength of the substrate paper with the proposed coating is higher than that of the paper in accordance with the prototype. The proposed coating composition of the paper BEDS1 of the temporary carrier of the transfer image will make it possible to obtain an intensive coloring of the resulting image, which will significantly improve the appearance of the products. The composition of the coating of the substrate paper of the temporary carrier of the decal based on polyvinyl alcohol, characterized in that, in order to increase the intensity of the image color, the coating further contains sodium alginate in the following ratio of components, wt.%: Polyvinyl alcohol 70-90 Sodium alginate 10 -thirty. Sources of information taken into account during the examination: 1. USSR author's certificate 357311, cl. D21 H 1/10, 1971. 2. The patent of the USSR 500248, cl. KOB R 3/00, 1971.