JPS5940952B2 - printing paste - Google Patents

Description

[Detailed description of the invention] The present invention relates to a printing paste.

More specifically, Na in sodium alginate is 1.5~
A continuous high-temperature steamer characterized in that a material substituted with an alkaline earth metal at a ratio of 15% (by weight, hereinafter the same) is used alone or in combination with other pastes as a base paste for printing. This invention relates to a printing paste for polyester that is subjected to steam heat treatment.

Sodium alginate (contains 8.0-9.5% Na) is extracted from brown algae and is widely used as a stabilizer for viscous foods such as ice cream, cheese, and syrup. There is.

Sodium alginate is also used as a base size for printing, and this size liquid is stable against the reactive dyes used in printing cellulose fibers, and the size liquid has excellent fluidity. It has advantages such as good permeability and excellent adhesive removal properties in the washing process after steam treatment.

In recent years, continuous high-temperature steamers [for example, Universal Loop Steamer (manufactured by Jukin Industries, Ltd.
Universal loopsteam+ e r
), but when printing fabrics printed with a printing paste using sodium alginate as the base paste is steam-treated in a continuous high-temperature steamer, satisfactory color development (i.e. Color value) has the disadvantage that it cannot be changed.

In general, when a continuous high-temperature steamer is used to heat printed fabrics printed with disperse dyes on polyester fiber fabrics, the resulting printed fabrics are generally lower than when steam-heated using a conventional batch-type high-pressure steamer. It is known that the color development of

On the other hand, it is also generally recognized that the extent to which the color development is reduced varies depending on the type of base paste used in the printing paste.

In other words, when printed fabrics are steam-treated with a continuous high-temperature steamer, for example, printed fabrics printed with printing pastes using starch-based pastes (mainly carboxymethylated starch), crude carboxymethyl cellulose, etc. as base pastes. Compared to those obtained using a batch-type high-pressure steamer, the degree of deterioration in color development is small, whereas sodium alginate, vegetable gums (derivatives such as guar gum and locust bean gum), and highly substituted refined carboxylic acid Printed fabrics printed with printing pastes such as methylcellulose used as the base glue have a much more significant decrease in color development than the former.

However, when a printed fabric printed with a printing paste using sodium alginate as the base paste is steam-treated in a continuous high-temperature steamer (e.g. 180° x 8 minutes), printing pastes using other pastes cannot be used. The advantage of this method is that it has extremely good desizing properties, whereas all printed fabrics that are steam-treated in the same manner as described above have poor desizing properties in the washing process.

Therefore, the inventors of the present invention have worked hard to eliminate the drawback of sloping, and to provide a printing paste for polyester that uses sodium alginate as the base paste for printing and has good color development even when heated in a continuous high-temperature steamer. conducted research.

According to the research results of the present inventors, printed fabric obtained by printing a printing paste using sodium alginate as a printing paste and a disperse dye on a polyester fiber fabric is steam-treated in a continuous high-temperature steamer. The degree of decrease in color development is greater when compared to those treated by steaming using a batch-type high-pressure steamer, and those using sodium alginate as the base size for printing are better than those using starch-based pastes as the base size for printing. It is not clear why the degree of decrease in color development is greater than those using starch-based pastes, but the fluidity of printing pastes using sodium alginate or starch-based pastes as the base paste for printing, The following differences were observed from the observation of the size, the size liquid of sodium alginate and the starch-based size liquid under a microscope, and the state of the film obtained from these size liquids.

That is, (1) In the steaming process using a continuous high-temperature steamer, printing pastes using starch-based pastes, crude carboxymethyl cellulose, etc. as base pastes with relatively good color-forming properties and base pastes with relatively poor color-forming properties are used. Comparing printing pastes that use sodium alginate, highly substituted purified carboxymethyl cellulose, vegetable gummy pastes, etc., the former lacks fluidity and is plastic; While a yield value is clearly seen in the flow curve, in the latter case the fluidity is smooth, and if there is a yield value in the flow curve, it is extremely small. (2) Printing amount in screen printing (i.e. , the amount of printing paste that adheres to the fabric during one scaging), printing pastes that use starch-based pastes, crude carboxymethyl cellulose, etc. as base pastes with more plastic fluidity are more effective in Newtonian The amount of adhesion is larger than that of printing pastes using sodium alginate, highly substituted refined carboxymethyl cellulose, plant-based ThI gummy pastes, etc. as base pastes that have good fluidity close to fluidity.

In addition, regarding the adhesion state of the printing paste on the fabric to be printed, in the case of printing pastes that use starch-based pastes as base pastes with plastic fluidity, the printing paste stays relatively on the surface of the fabric, while the fluidity is low. With printing pastes that use sodium alginate as the base glue, which is good and shows almost no yield value, it can be seen that the printing paste flows and penetrates into the interior of the fabric from the surface. (3) Starch-based pastes, According to microscopic observation of the size solution of crude carboxymethyl cellulose and sodium alginate, many starch granules were significantly swollen and partially destroyed in the size solution of starch-based glue, and swelled and swollen in the size solution of crude carboxymethyl cellulose. It can be seen that many pieces of cellulose are contained.

On the other hand, the size liquid of sodium alginate is uniform, with no particles that can be seen in starch-based pastes or the size liquid of crude carboxymethyl cellulose.

In addition, the appearance of the film obtained by pouring these size liquids in a thin film form on a glass plate and drying them is uniform and nearly transparent when the size liquid is made from sodium alginate, but on the other hand, when the size liquid is made from starch-based Differences were observed in the thickening material obtained from the thickening liquid, such as roughness and discontinuity.

Considering these differences, we found that when printed fabrics printed on polyester fiber fabric using a printing paste using disperse dyes are steam-treated in a continuous high-temperature steamer, printing exhibits good color development. The appearance of the paste is that its fluidity is plastic, the printing paste stays relatively on the surface of the printing fabric, and the size liquid has a microgel-like structure (sodium alginate paste). The liquid can be said to have a glass-like structure)
It can be said that it has the following.

However, based on the above findings, the present inventors conducted further studies in order to obtain sodium alginate modified to have lower fluidity as a base paste for textile printing, and as a result, they were able to complete the present invention. .

That is, in the present invention, Na in sodium alginate is 1.5
A polyester that is steam-treated in a continuous high-temperature steamer, characterized in that a polyester substituted with an alkaline earth metal at a rate of ~15% is used alone or in combination with other pastes as a base paste for printing. It relates to printing paste,
By using sodium alginate in which Na in the sodium alginate has been replaced with an alkaline earth metal within the above-mentioned specific range as a base paste for printing, it is possible to create a slanted surface like that in a printing paste using a conventional base size for textile printing. The drawbacks have been completely eliminated, and it has the extremely remarkable effect that it can be used as a printing paste with significantly improved color development, not only in conventional batch-type high-pressure steamer steaming treatment, but even in continuous-type high-temperature steamer steaming treatment. be done.

As mentioned above, the sodium alginate in which Na in the sodium alginate is replaced with an alkaline earth metal (hereinafter referred to as modified sodium alginate) used in the present invention is 1.5 to 15% Na in the sodium alginate. , preferably sodium alginate substituted with an alkaline earth metal such as calcium, barium, or magnesium in a proportion (i.e., substitution ratio) of 5 to 12%; One species, two or more species, or a mixture of substituted species may be used as appropriate.

When using sodium alginate in which the Na in the sodium alginate has been replaced with an alkaline earth metal at a substitution ratio of less than 1.5%, the effect of the sodium alginate modified to reduce fluidity cannot be changed, and therefore this is not used. When the printed fabric printed with the printing paste was steam-treated in a continuous high-temperature steamer, good color development was not achieved, and the Na in the sodium alginate was replaced by an alkaline earth metal at a substitution ratio of more than 15%.

When using modified sodium alginate, the modified sodium alginate itself is only dispersed and swollen in water, but is not completely dissolved, and therefore cannot be used as a glue, which is not preferable.

The method for producing the modified sodium alginate used in the present invention includes, for example, a concentration at which Na in the sodium alginate is replaced with the alkaline earth metal at the specific substitution ratio (almost quantitatively replaced). Disperse, swell, and dissolve sodium alginate powder in an aqueous alkaline earth metal solution.
This solution is left to stand for a day and night, and then poured into aqueous methanol to precipitate modified sodium alginate. The modified sodium alginate is washed with isopropyl alcohol and then dried to produce the solution.

It is well known that sodium alginate easily gels when calcium chloride is added to its paste solution, and it also often reacts with not only calcium ions but also other polyvalent metal ions to form gels. It is a well-known place.

However, in the present invention, as described above, a trace amount of alkaline earth metal ion is reacted with sodium alginate, and the appearance of the sodium alginate paste is reduced to such an extent that the paste solution of sodium alginate does not gel, that is, to the extent that it can be used as a base paste for printing. It was completed by modifying it with an alkaline earth metal.

In the present invention, the modified sodium alginate is one in which a part of Na in one molecule of sodium alginate is replaced with an alkaline earth metal, and is a mixture of sodium alginate and an alkaline earth metal salt of alginic acid. That's not the point.

The modified sodium alginate used in the present invention is sodium alginate in which Na in the sodium alginate is replaced with an alkaline earth metal such as calcium, barium, or magnesium at the specific substitution ratio as described above. The most preferable base paste is calcium-substituted sodium alginate, and when printed fabrics printed with a printing paste using this are steam-treated in a continuous high-temperature steamer, the color development is significantly improved. Vine.

Among the modified sodium alginate, sodium alginate substituted with magnesium can withstand use as a base paste for printing without gelling in water, even if all the Na in the sodium alginate has been replaced with magnesium. sell.

The modified sodium alginate used in the present invention includes:
As mentioned above, sodium alginate is a sodium alginate in which Na is substituted with an alkaline earth metal at a specific substitution ratio, but the printing paste of the present invention can be modified depending on the molecular weight of the modified sodium alginate used or the viscosity of the paste liquid. For example, without limitation, sodium alginate modified at the specific substitution ratio is reduced in molecular weight by an oxidation reaction, such as hydrogen peroxide, or commercially available sodium alginate is reduced in molecular weight by the oxidation reaction,
This was then modified with an alkaline earth metal at the specified substitution ratio, that is, commercially available sodium alginate was modified after lowering its molecular weight, and the viscosity of the paste was made different. However, this does not change the effect of the present invention.

The modified sodium alginate used in the present invention has a viscosity of 20 to 1,500 cp as measured by a B-type viscometer at 25° C. at an aqueous solution concentration of 1 subtract.

Other thickeners used in the present invention include guar gum, locust bean gum, crystal gum, starch, carboxymethylcellulose, hydroxyethylcellulose, coumarind gum, and water-soluble synthetic polymers (such as inbutene-sodium maleate copolymer). Typical base pastes for textile printing are listed.

When the modified sodium alginate paste and other glue are used in combination, it is preferable that the ratio of the modified sodium alginate glue to the entire base glue is at least 20%. When the modified sodium alginate paste was used in combination as the base paste, improvements in adhesive removal and color development were observed, especially when a high-temperature steamer was used as the steamer. It has great meaning.

In the printing paste of the present invention, the concentration of the size liquid of the original size for printing is 3 to 30%, preferably 6 to 20%, and the size liquid contains direct dyes, acid dyes, disperse dyes, and reactive dyes. Glycerin, acetin, etc. are used as printing agents.
Printing components such as dye-dissolving agents such as diethylene glycol, cellosolve, resorcinol, and urea, and preservatives such as carbolic acid, salicylic acid, and formalin are blended in normally used amounts.

As mentioned above, the printing paste of the present invention can significantly improve color development not only in conventional batch-type high-pressure steamer steaming treatment, but also in continuous high-temperature steamer steaming treatment, which normally reduces color development. Moreover, the adhesive removal property of the printed fabric by washing with water after steaming treatment is also very good, which is satisfactory.

Note that the sodium alginate modified with the above-mentioned specific substitution ratio used in the present invention can be used not only as a base paste for textile printing or as an aqueous paste, but also as a turpentine solution in 60 parts of a 3.5% aqueous solution of the modified sodium alginate. 70 parts and 5 parts of emulsifier (nonionic or anionic surfactant) in 2 parts of water.
5 parts and 40 parts of emulsified liquid are added, and it is effectively used for half emulsion paste.

Next, the printing paste of the present invention will be specifically explained with reference to Examples, Reference Examples, and Comparative Examples, but the present invention is not limited only to these Examples.

Reference Examples 1 to 9 Commercially available sodium alginate [manufactured by Kamogawa Kasei Kogyo ■, Duck Algin N5PH, Na content: 9.5%, Ca content: 0.042%] was added to a calcium chloride aqueous solution with the concentration shown in Table 1. After standing for a day and night, this solution was poured into 70% water-containing methanol to precipitate the modified sodium alginate, and the modified sodium alginate was washed with isopropyl alcohol, and then dried. Calcium-modified sodium alginate was produced respectively.

Table 1 shows the viscosity of the modified sodium alginate paste.

The concentration of the glue solution is 2.5% of the modified sodium alginate.
% aqueous solution, and the viscosity of the paste liquid is a value measured at 25° C. using a B-type viscometer (manufactured by Tokyo Keiki ■) (the same applies hereinafter).

For comparison, the viscosity of commercially available sodium alginate paste (mentioned above) was measured in the same manner as above, and is shown in Table 1.

Reference Examples 10 to 16 Commercially available sodium alginate (mentioned above) was dissolved in a barium chloride aqueous solution with the concentration shown in Table 2, and sodium ginate was added to Al* modified with barium in the same manner as in Reference Examples 1 to 8. Then, the viscosity of these paste solutions was measured.

The results are shown in Table 2.

Reference Examples 17 to 23 Commercially available sodium alginate (mentioned above) was dissolved in an aqueous magnesium chloride solution having the concentration shown in Table 3, and sodium alginate modified with magnesium was prepared in the same manner as in Reference Examples 1 to 8. The viscosity of these glue solutions was measured.

The results are shown in Table 3.

From Tables 1 to 3, the modified sodium alginate used in the present invention, that is, the sodium alginate in which Na is replaced with an alkaline earth metal at a substitution ratio of 1.5 to 15%, is It is clear that it is more preferable as a base paste for textile printing because its fluidity is more plastic than that of sodium alginate paste, and it is suitable for surface printing and is expected to produce sharp edges.

Example 1 (A) Sodium alginate modified with calcium (Ca content = 1.05%,
Substitution ratio (Ca/Na+Ca): 9.1%) was used as the base paste (paste solution concentration = 4-coupled aqueous solution), and a printing paste (color paste) prepared with the following formulation was used in a test autoscreen textile printing machine [
Printed using a mesh size #: 100 screen (scaling speed: 11.
The mixture was dried for 0 m7 minutes at a squage pressure of 0.2 to 2/CrfL) to produce a printed fabric.

The printed fabric was then heated at 130°C for 30 minutes and 18 minutes using a batch-type high-pressure steamer [manufactured by Tsujii Senki Kogyo ■] and a continuous high-temperature steamer [manufactured by Showa Kikai Kogyo ■].
It was steamed at 0° C. for 6 minutes, washed with water and dried in a conventional manner to obtain a printed cloth.

For comparison, (B) commercially available sodium alginate [(
(mentioned above), size liquid i degree = 5% aqueous solution], (Q crude carboxymethyl cellulose [manufactured by Nippon Chemical Industry ■, Chiracolate P
-200OA, size solution concentration: 10% aqueous solution], (D) purified carboxymethyl cellulose [manufactured by Daiichi Kogyo Seiyaku ■, Fine Gum HE, size solution concentration near % aqueous solution], (scented guar gum-based glue [manufactured by Mayhall Chemical Co., Ltd.] , Maypro Gum NP, size solution concentration: 12% aqueous solution] and (F'') starch ether [manufactured by Abebe, Sorbitose C-5, size solution concentration: 10% aqueous solution] were used as base glues, and prepared according to the following formulation. Each of the printing pastes was printed on a polyester fiber fabric in the same manner as described above and subjected to steam heat treatment to obtain a printed fabric.

The formulation of the printing paste is as follows.

Disperse dye (manufactured by Bayer AG, Resolin Red FB) 2.0 rooms Base (wetting agent) 2.0 parts Ammonium tartrate (acid generator) 1.0 part Water
35.0 parts Motonori
Table 4 shows the coloring properties of the printed fabric obtained in a total of 100 copies.

The color development was evaluated using a reflective color difference meter [■Takasu Seisakusho,
RC-I type] was used to measure the surface concentration of the dye on the printed fabric, and the surface concentration of the dye on the printed fabric obtained by steaming using a commercially available sodium alginate as the base paste and a batch-type high-pressure steamer was determined to be 100%. Each is shown as a relative value (the same applies below).

/ From Table 4, the printing paste of the present invention obtained using sodium alginate modified with calcium as the printing paste is:
It is clear that, compared to the printing pastes of Comparative Examples 1 to 4, extremely good coloring properties can be obtained not only in the steaming treatment using a batch-type high-pressure steamer but also in the steaming treatment using a continuous-type high-temperature steamer.

Furthermore, the printing paste of the present invention has extremely good adhesive removal properties when washed with water after steam treatment, and the texture of the obtained printed fabric is soft, compared to the printing pastes of Comparative Examples 2 to 5. Ta.

Examples 2 to 4 Disperse dye [manufactured by Sumitomo Chemical Co., Ltd., Sumikalon Turquis]
Blue 5-GL, contains 2% of acid generator [Mitejima Chemical Industry Co., Ltd., Ultra MTN-2,1, 1% of sodium alginate modified with calcium as base glue (Ca content: 0) .55%, substitution ratio (Ca/Na+Ca
): 4.8%), sodium alginate modified with magnesia lamuti (Mg content 20, 60%, substitution ratio (Mg/Na
+Mg): 5.5%) or sodium alginate modified with barium (Ba content: 0.44%, substitution ratio (Ba
/Na+Ba): 4%)), printing pastes prepared from 6-di aqueous solution, 6-chi aqueous solution and 5% aqueous solution of size solution, polyester satin fabric and mesh size≠1
Printing and steaming were carried out in the same manner as in Example 1, except that a No. 20 screen was used.

Next, the fabric after steaming was washed with water for 5 minutes, and then subjected to alkaline reduction washing [washing bath composition: caustic soda (38° Baume) 29/l, hydrosulfide 29/l, detergent (
Daiichi Kogyo Seiyaku ■, Tryball TK) 2 g/l, washing conditions: 85° C. for 5 minutes], then washed with water and dried to obtain printed fabrics.

For comparison, a printed fabric was obtained in the same manner as above except that a 3.5% aqueous size solution containing commercially available sodium alginate (described above) was used as the base size.

Table 5 shows the color development of the printed fabric obtained.

From Table 5, it can be seen that the degree of decrease in color development when the printing paste obtained using the printing paste of the present invention is changed from steaming treatment using a batch-type high-pressure steamer to steaming treatment using a continuous-type high-temperature steamer is as follows: It is clear that this is significantly improved compared to Comparative Example 6.

Furthermore, all of the printed fabrics obtained using the printing paste of the present invention had good texture, and no dullness or discoloration was observed.

Example 5 2 parts of disperse dye [manufactured by BAZUF Co., Ltd., Varanilb IJ IJ Antred BEL], ammonium sulfate (acid generator)
Contains 1% of sodium metanitrobenzene sulfonate (reduction inhibitor), 0.2% of sodium metanitrobenzene sulfonate (reduction inhibitor), and an antifoaming penetrant (manufactured by Yokohama Polymer ■, Impulver 800) in one part, each differs depending on the base glue of calcium, magnesium, or barium. Each printing paste prepared from a size solution using sodium alginate modified with a substitution ratio was used to print on a polyester tricot fabric in the same manner as in Example 1, and after drying, it was heated using a continuous high-temperature steamer (described above). They were each subjected to steam heat treatment (at 180° C. for 6 minutes).

The fabric after the steam treatment was then washed with water and dried in a conventional manner to obtain a printed fabric.

For comparison, a printed fabric was prepared in the same manner as above except that commercially available sodium alginate (described above) was used as the base paste.

Figure 1 shows the color development of the printed fabric obtained.

In Fig. 1, the numbers on the vertical axis (color development ratio) are expressed using commercially available sodium alginate as the base glue and the color development of the product steam-treated with a continuous high-temperature steamer as 100. It is shown as a relative value of color development using sodium alginate.

In addition, in the curves in Figure 1, those marked with ○ are sodium alginate modified with calcium, those marked with Δ are sodium alginate modified with barium, and those marked with X are sodium alginate modified with magnesium. The color development ratios of the products using sodium alginate modified with are shown below.

From Figure 1, it can be seen that the modified sodium alginate has a substitution ratio of 2% (2%) with calcium, barium or magnesium.
In other words, from a content of about 0.2%, an improvement in color development was observed in the steaming process using a continuous high-temperature steamer.
Substitution ratio is 13-14% (i.e. content: approximately 1.5%)
), it is clear that the rate of improvement in color development as the substitution ratio by these alkaline earth metals increases does not improve much.

In addition, sodium alginate modified with calcium or barium has a substitution ratio of 1 with calcium or barium.
If the content exceeds 3 to 14% (i.e., content: about 1.5%), the modified sodium alginate will have a reduced solubility or gelation, and will therefore become unsuitable as a base paste for textile printing. Undesirable.

However, sodium alginate modified with magnesium can withstand use as a base paste for printing even if the substitution ratio by magnesium exceeds 13 to 14% (i.e. content: about 1.5%); Further improvement in color development cannot be expected.

Example 6 0.2% of disperse dye (manufactured by Nippon Kayaku, Kayalon Polyester Blue T-8), 0.2% of disperse dye [manufactured by Eastman Chemical Co., Ltd., Eastman Polyester Yellow]
40 parts of a dye solution containing 1.5% of 6GLSW), 2.0% of urea (wetting agent) and 0.2% of sodium metanitrobenzenesulfonate (antireduction agent) and modified with calcium as base paste. Sodium alginate (Ca content: 1.
2%, substitution ratio (Ca/Na+Ca): 10.5%) dissolved in water at a concentration of 5% and 35 parts of a size solution and starch ether [
Printing paste obtained by mixing Sorbitose C-5 (manufactured by Abebe) with 25 parts of a paste prepared by dissolving 10% concentration in water, polyester suede fabric, and mesh size 4F.
A steam treatment was carried out in the same manner as in Example 1, except that a No. 135 screen was used, using a batch-type high-pressure steamer and a continuous-type high-temperature steamer to obtain printed fabrics.

By using starch ether as a base glue, the color development of the printed fabric obtained is almost between that of the one steam-treated with a batch-type high-pressure steamer and the one steam-treated with a continuous-type high-temperature steamer. No differences were observed, and the result was extremely good.

In addition, steam treatment using a continuous high-temperature steamer (180°C
After 6 minutes), the adhesiveness of the fabric is further improved,
Furthermore, no deterioration in texture was observed due to the combined use of starch ether.

Example 7 A printing paste was prepared with the following blending ratio.

Reactive dye [Imperyl Chemical 3.0 parts manufactured by Industries (ICI), Prodione Black HN, 1 Urea 10.0 parts Sodium metanitrobenzenesulfonate 0.2 parts
Sodium hydrogen carbonate 2.5 parts water
24.3 parts Alginic acid modified with barium 60.0 parts Soda (Ba content: 20.42%, substitution ratio (Ba/Na+Ba): 3.8%, 5% aqueous solution) Total of 100 parts This printing paste Print on broad cotton fabric using a hand screen (printing conditions: Niclean mesh: #: 100),
After drying, it was steamed at normal pressure (100° C. for 10 minutes), then washed with water and soaped in a conventional manner to obtain a printed cloth.

For comparison, a printed fabric was prepared in the same manner as above except that commercially available sodium alginate was used as the base paste.

The color development of the printed fabric obtained using the printing paste of the present invention (measured with a reflection color difference meter) is about 2 times higher than that of the printed fabric obtained using commercially available sodium alginate as the base paste.
This was an improvement of about 0%.

Furthermore, the printing paste of the present invention has a short fluidity compared to the printing paste obtained using commercially available sodium alginate, and therefore the printing paste can adhere to the surface of the fabric to be printed. .

Comparative Example Water-insoluble calcium alginate was prepared by adding an excess of calcium chloride to a commercially available aqueous solution of sodium alginate (manufactured by Kibun Food ■, Duck Algin N5PN).

1 part of the obtained calcium alginate and sodium alginate I
Add 9 parts of Jum to 190 parts of water and stir and mix uniformly.
A glue solution containing about 10% calcium alginate (concentration 5
%) was obtained.

Using this paste solution, a printing paste was prepared with the following blending ratio.

Disperse dye (manufactured by Mitsubishi Chemical Industries, Ltd., 1.0 part Dianics Bron 3BFS) Reduction inhibitor (manufactured by Nippon Senka ■, 1.0 part Distosalt MNBS) Ammonium tartrate 0.5 part Size liquid
60.0 parts water 37.5 parts 1
00 parts of the printing paste was used to print on polyester Amundsen raw cloth, and then steamed using a continuous high temperature steamer (1
80° C. for 6 minutes) to develop color, and the surface concentration of the dye was measured in the same manner as in Example 1.

The degree of color development of this product is 100 when the surface concentration is 100 when using only sodium alginate as a glue (concentration 5), while on the other hand, sodium alginate modified with calcium (calcium content 0) .7
5%, substitution ratio 6.5%) printed with the printing paste of the present invention using the printing paste of the present invention (concentration 5%), the color development was significantly improved to 155.

[Brief explanation of drawings]

Figure 1 shows the color development ratio, which shows the color development of a printing paste obtained using modified sodium alginate as the base paste, relative to the color development of a printing paste obtained using commercially available sodium alginate. FIG. 3 is a relationship diagram showing the relationship between the substitution ratio of alkaline earth metal in the modified sodium alginate and the substitution ratio of alkaline earth metal in the modified sodium alginate.

Claims (1)

[Claims] 1. Sodium alginate in which Na is replaced by an alkaline earth metal at a weight ratio of 1.5 to 15 is used alone or in combination with other pastes as a base paste for printing. A printing paste for polyester that is steam-treated in a continuous high-temperature steamer.