阅读说明：本技术 一种用于数码转移印花纸的涂层组合物及数码转移印花纸 (coating composition for digital transfer printing paper and digital transfer printing paper ) 是由 李建方 李鑫 涂玲敏 于 2019-07-24 设计创作，主要内容包括：本发明涉及一种用于数码转移印花纸的涂层组合物及数码转移印花纸。所述涂层组合物包含滑石粉和阳离子瓜尔胶。在一个实施方案中,所述涂层组合物包含羧甲基纤维素、淀粉、氯化钠、高岭土、二氧化硅、膨润土粉末、海藻酸钠、羧甲基淀粉、滑石粉和瓜尔胶。利用同时含有滑石粉和瓜尔胶的数码转移印花纸涂层组合物,能够制造出粗糙(例如,平滑度小于10)的数码印花纸,以用于提高数码转移印花的印刷质量和成品率。(The invention relates to a coating composition for digital transfer printing paper and the digital transfer printing paper. The coating composition comprises talc and cationic guar. In one embodiment, the coating composition comprises carboxymethylcellulose, starch, sodium chloride, kaolin, silica, bentonite powder, sodium alginate, carboxymethyl starch, talc and guar gum. By using the digital transfer printing paper coating composition containing both talcum powder and guar gum, rough (for example, smoothness is less than 10) digital printing paper can be manufactured so as to improve the printing quality and yield of digital transfer printing.)

1. A coating composition for digital transfer printing paper, wherein the coating composition comprises talc and cationic guar.

2. A coating composition according to claim 1, wherein the weight ratio of talc to cationic guar is from 7:1 to 1: 7.

3. The coating composition of claim 1, further comprising one or more of the following components: carboxymethyl cellulose, starch, sodium chloride, kaolin, silicon dioxide, bentonite powder, sodium alginate and carboxymethyl starch.

4. A coating composition according to claim 1, wherein the coating composition comprises one or more of the following components by weight: 5-50 parts of carboxymethyl cellulose, 5-20 parts of starch, 5-20 parts of sodium chloride, 2-20 parts of kaolin, 1-15 parts of silicon dioxide, 4-10 parts of bentonite powder, 4-20 parts of sodium alginate, 1-15 parts of talcum powder, 1-15 parts of high-substitution-degree carboxymethyl starch and 1-15 parts of cationic guar gum.

5. the coating composition of claim 4, wherein the coating composition comprises 20 parts by weight of carboxymethyl cellulose, 20 parts by weight of starch, 5 parts by weight of sodium chloride, 2 parts by weight of kaolin, 10 parts by weight of silicon dioxide, 8 parts by weight of bentonite powder, 10 parts by weight of sodium alginate, 10 parts by weight of talc, 10 parts by weight of high-substitution carboxymethyl starch and 5 parts by weight of cationic guar gum.

6. The coating composition of claim 4, wherein the coating composition comprises, by weight, 30 parts of carboxymethyl cellulose, 10 parts of starch, 5 parts of sodium chloride, 2 parts of kaolin, 10 parts of silicon dioxide, 8 parts of bentonite powder, 10 parts of sodium alginate, 10 parts of talcum powder, 10 parts of high-substitution carboxymethyl starch and 5 parts of cationic guar gum.

7. The coating composition of claim 4, wherein the coating composition comprises 10 parts by weight of carboxymethyl cellulose, 30 parts by weight of starch, 5 parts by weight of sodium chloride, 2 parts by weight of kaolin, 10 parts by weight of silicon dioxide, 8 parts by weight of bentonite powder, 10 parts by weight of sodium alginate, 10 parts by weight of talc, 10 parts by weight of high-substitution carboxymethyl starch and 5 parts by weight of cationic guar gum.

8. The coating composition for the digital transfer printing paper is characterized by comprising, by weight, 5-50 parts of carboxymethyl cellulose, 5-20 parts of starch, 5-20 parts of sodium chloride, 2-20 parts of kaolin, 1-15 parts of silicon dioxide, 4-10 parts of bentonite powder, 4-20 parts of sodium alginate, 1-15 parts of talcum powder, 1-15 parts of high-substitution-degree carboxymethyl starch and 1-15 parts of cationic guar gum.

9. A digital transfer printing paper comprising the coating composition according to any one of the preceding claims 1-8.

10. The digital transfer printing paper according to claim 9, wherein the smoothness of the digital transfer printing paper is 10s or less.

Technical Field

The invention belongs to the field of thermal sublimation transfer printing, and particularly relates to a coating composition for digital transfer printing paper and the digital transfer printing paper containing the coating composition.

Background

The thermal sublimation transfer printing is an anhydrous printing and dyeing process and has higher environmental protection effect. The method has important value on energy-saving emission-reduction transformation projects of high-energy-consumption industries advocated by the state at present, and becomes a research hotspot at present. The principle of thermal sublimation transfer printing is that at high temperature (usually more than 200 ℃), the disperse dye on the thermal sublimation transfer printing medium is sublimated to the chemical fiber fabric and is directly fixed by fabric fibers, and the printed chemical fiber fabric can be free from washing. It is believed that the thermal sublimation transfer printing process, particularly the digital thermal sublimation transfer printing process, is a highly environmentally friendly, practical and reliable process, and is a promising alternative to conventional printing and dyeing processes.

However, in the conventional thermal sublimation transfer process, due to the fact that smoothness of the used paper is high, some silky fabrics are deviated in the production process, and unnecessary inferior-quality products are caused.

therefore, there remains a need in the art for a rough thermal sublimation transfer paper having a low smoothness.

Disclosure of Invention

In view of the disadvantages of the prior art, it is an object of the present invention to provide a coating composition for producing a digital transfer printing paper, by which a thermal sublimation transfer printing finished paper having a low smoothness (e.g., less than 10) can be produced.

Another object of the present invention is to provide a thermal sublimation transfer finished paper having a low smoothness (e.g., less than 10). In the thermal sublimation rendition in-process, because the smoothness degree of used paper is lower, consequently, use smooth surface fabric immediately, the condition of paper off tracking can not appear yet in process of production to promote the printing quality and the yield of thermal sublimation rendition by a wide margin.

The above object is achieved by the following scheme:

In one aspect, the present invention provides a coating composition for use in the manufacture of digital transfer printing paper, the coating composition comprising talc and guar gum. Preferably, the guar is a cationic guar.

Talcum powder is commonly used in paper making industry, and has the characteristics of high whiteness, stable granularity, low abrasion degree and the like. The paper manufactured by the powder can achieve the effects of smoothness and fineness of paper, raw material saving and paper service life prolonging. Guar gum has fiber affinity and can improve paper retention and drainage while maintaining or even improving paper uniformity. In addition, guar gum has good film forming properties which maintain good mobility of the resulting paper.

By using the digital transfer printing paper coating composition containing both talcum powder and guar gum, rough (for example, smoothness is less than 10) digital printing paper can be manufactured so as to improve the printing quality and yield of digital transfer printing.

Further preferably, the coating composition further comprises one or more of the following components: carboxymethyl cellulose, starch, sodium chloride, kaolin, silicon dioxide, bentonite powder, sodium alginate and carboxymethyl starch. In some specific embodiments, the coating composition comprises, by weight: 5-50 parts of carboxymethyl cellulose, 5-20 parts of starch, 5-20 parts of sodium chloride, 2-20 parts of kaolin, 1-15 parts of silicon dioxide, 4-10 parts of bentonite powder, 4-20 parts of sodium alginate, 1-15 parts of talcum powder, 1-15 parts of high-substitution-degree carboxymethyl starch and 1-15 parts of cationic guar gum.

In the technical scheme, the carboxymethyl cellulose has short molecular chain, stable molecular structure, good salt resistance, acid resistance, calcium resistance, high temperature resistance and the like, and good solubility. The starch is used as sizing material, so that the paper has the properties of smoothness, easy printing, wear resistance and grease resistance, and has certain dry strength. The sodium chloride has the functions of moisture absorption and solubilization. The kaolin is used as a filler, has stronger plasticity and high fire resistance, and simultaneously has good insulativity and chemical stability. The silicon dioxide can enhance the strength, toughness and folding resistance of paper, and can increase the processing operation process during paper forming and the stability of paper pulp, so that the paper pulp has more excellent processability. The bentonite is used as a retention aid, has excellent retention effects on fine fibers, fillers and wet-end chemical auxiliaries, can keep stable wet-end conditions, and improves the evenness and the physical properties of paper. Sodium alginate can improve the mechanical strength indexes of paper, such as tensile strength, bursting strength, napping strength and abrasion resistance, so that the surface of the obtained paper is softer and more uniform. Meanwhile, sodium alginate can also improve the retention rate of mineral fillers and fine fibers, increase the dimensional stability of paper and reduce the absorbability of the paper to ink, dye and paint. Carboxymethyl starch can be used as a sizing material to improve fiber retention and paper strength.

further preferably, the coating composition comprises 20 parts of carboxymethyl cellulose, 20 parts of starch, 5 parts of sodium chloride, 2 parts of kaolin, 10 parts of silicon dioxide, 8 parts of bentonite powder, 10 parts of sodium alginate, 10 parts of talcum powder, 10 parts of high-substitution-degree carboxymethyl starch and 5 parts of cationic guar gum, or the coating group consists of the same. Further preferably, the coating composition comprises or consists of 30 parts of carboxymethyl cellulose, 10 parts of starch, 5 parts of sodium chloride, 2 parts of kaolin, 10 parts of silicon dioxide, 8 parts of bentonite powder, 10 parts of sodium alginate, 10 parts of talcum powder, 10 parts of high-substitution carboxymethyl starch and 5 parts of cationic guar gum. Further preferably, the coating composition comprises or consists of 10 parts of carboxymethyl cellulose, 30 parts of starch, 5 parts of sodium chloride, 2 parts of kaolin, 10 parts of silicon dioxide, 8 parts of bentonite powder, 10 parts of sodium alginate, 10 parts of talcum powder, 10 parts of high-substitution carboxymethyl starch and 15 parts of cationic guar gum.

By adopting the technical scheme, the digital transfer printing paper with low surface smoothness, high strength and toughness and good wear resistance can be obtained.

In a second aspect, the present invention provides a digital transfer printing paper comprising a coating composition according to the preceding first aspect. Further preferably, the smoothness of the digital transfer printing paper is less than 10 s.

Through utilizing digital transfer printing paper that has rough surface uses the smooth surface fabric immediately, the condition of paper off tracking can not appear in the production process yet to promote the printing quality and the yield of thermal sublimation rendition by a wide margin.

In summary, according to the technical scheme, the invention can achieve the following excellent technical effects:

(1) With the coating composition according to the present invention, a thermal sublimation transfer finished paper having a low smoothness (e.g., less than 10) can be manufactured; meanwhile, the finished paper has higher strength and toughness and better wear resistance performance, and keeps good mobility;

(2) by using the thermal sublimation transfer printing paper provided by the invention, even if silky fabric is used, the paper can not deviate in the production process, so that the printing quality of thermal sublimation transfer printing is greatly improved;

(3) By using the thermal sublimation transfer printing paper, the loss of the high-slip fabric in the digital transfer printing process is reduced, the yield is improved, and the fineness and the transfer rate of digital printing are kept.

Detailed Description

Some specific embodiments of the present invention will be described below with reference to examples. Those of ordinary skill in the art will appreciate that these examples are provided merely to illustrate how the invention can be practiced and are not intended to limit the scope of the invention in any way.

in conventional digital transfer printing paper, talc powder is usually added to the coating to improve the smoothness of the finished paper. However, in a great deal of practice, the inventors have unexpectedly found that the use of talc and guar gum at the same time, on the contrary, results in a paper with greatly reduced smoothness, even as low as around 1S, thus obtaining a rough digital printing paper, while maintaining good mobility. Based on this unexpected finding, the present inventors have completed the present invention.

the kit according to the invention will be described and illustrated in more detail below with reference to examples. Those of ordinary skill in the art will appreciate that these examples are provided for illustrative purposes only, and that those of ordinary skill in the art will better understand how to implement the present invention and will not set forth any limitations on the scope of the present invention.