JPS6028954B2 - Printing base agent - Google Patents

Description

[Detailed description of the invention] TECHNICAL FIELD The present invention relates to a textile printing adhesive.

For example, in screen printing, the fabric to be printed is generally fixed on a printing table, a screen frame with a desired pattern etc. is placed on top of it, printing paste is printed on top of this, and then the fabric to be printed is placed on the printing table. This process involves a series of steps in which the fabric is peeled off from the fabric, then dyed by heat treatment in a steamer or the like, and after dyeing, the fabric is washed with water to remove printing paste, unfixed dye, etc.

Among these series of steps, the work of fixing the cloth to be printed on the printing stand, the so-called grounding work, is particularly important. In other words, in order to properly dye the desired pattern on the fabric to be printed, a screen frame is placed on the printing table as described above, so the grain of the fabric to be printed on the printing table is bent in the vertical direction. This is because if a partial chick occurs in a part of the cloth, it will immediately lead to a defective product. However, on the other hand, due to dyeing costs, the fabrics to be printed are generally quite wide and long, and in recent years, the fabrics to be printed have become extremely thin. Therefore, laying the ground has become even more difficult. Under these circumstances, the following are the methods of laying the ground provided by the subordinates.

{11 starch glue, polyvinyl alcohol (PVA),
Carboxymethyl cellulose (CMC), guar gum,
A method of using water-soluble glue such as gum arabic as a temporary adhesive.

'2} A method using a permanent adhesive mainly consisting of an acrylic resin polymer and a plasticizer.

'3' A method of fixing both sides of the fabric to be printed on the printing stand with adhesive tape.

'4' A method of fixing both sides of the fabric to be printed on the printing stand with pushpins, etc.

Among the conventionally used methods, the first method using a temporary adhesive has the following drawbacks.

If the fabric to be printed is thin, the water-repellent adhesive will penetrate the surface of the fabric and come out, which will worsen the staining of the dye in the color paste to the penetrated area, causing This causes uneven color development. This phenomenon is generally called ``Yuki Gaeshi'', and the occurrence of defective products due to this ``Yuki Gaeshi'' is the most difficult problem when printing patterns, etc. on thin fabrics using water-soluble glue, and is currently not considered a problem. There is no solution.'o
} In the case of water-soluble adhesives, the fabric to be printed must be stretched immediately after it is applied on the printing table but before it has dried, so the fabric to be printed is wound up in a crooked manner and cannot be stretched as it is. Even if it happens, it cannot be corrected later. The only way to fix it is to start over. For this reason, in the case of a panel pattern, a check pattern, a straight pattern, etc., the print is printed in a bent state, resulting in a defective product in which the pattern and the grain do not match. This phenomenon is generally called "grain bending" and is a major factor in the occurrence of defective products in the case of adhesives using water-soluble adhesives, similar to the above-mentioned "Yuki Gaeshiichi". When pasting, at least five steps are required: a water-soluble glue application process, a printing fabric stretching process, a printing paste stamping process using colored starch, a printing fabric winding process, and a printing stand cleaning process. The workability is poor compared to other methods because the printing process and printing table washing process are repeated every time.W The water-soluble sizing agent is removed each time and a new one is used each time as mentioned above, resulting in high costs. The next method is {2}, which uses a permanent adhesive, but compared to the temporary adhesive described above, this method has the following advantages:
Although it has the advantages of being relatively easy to correct even if "fabric warping" occurs, requiring fewer processes, and being low cost as it can be used many times with a single adhesive, it has the following advantages: There are drawbacks such as.

{i' In the case of acrylic resin-based polymers used as permanent adhesives, the adhesive force is too strong, and when the fabric to be printed is wound up, the color paste that has penetrated to the back side of the fabric and reached the adhesive side may Due to the adhesive action of the adhesive, some of it becomes powder and scatters, adhering to other parts of the pattern and contaminating the fabric. This phenomenon is generally called "glue flying" and is a major factor in the occurrence of defective products. 'o｝ When the fabric to be printed is a silk fabric, the colored paste easily penetrates especially to the back side, and when the fabric to be printed is rolled up, the colored starch that has penetrated to the back side is attached to the fabric side and to the printing table side. This causes unevenness in the adhesion of colored paste to the printed fabric, which appears as uneven coloring after heat treatment such as steaming, and becomes a factor in the generation of defective products. Therefore, it is extremely difficult to print on extremely thin fabrics using this method. The problem is that dust and lint floating in the air tend to adhere to the fabric, and once it adheres, it is difficult to remove even when washed with water due to its strong adhesive strength.
In other words, the work environment must be maintained in a clean state, which increases costs. If the fabric to be printed is wool and has long hair, the hair will strongly adhere to the adhesive and the adhesion will be significantly reduced the next time. Unsuitable for use with similar fibers. ■When laying the resin on the printing table, it is generally done with a spatula called a squeegee, but during the work, you can change the speed by temporarily stopping the squeegee as it moves from one side to the other. , minute irregularities were formed in that part, and it was almost impossible to correct these irregularities. For this reason, applying adhesive requires many years of experience and great skill. Next '3
',■ is a method of fixing both sides of the printed fabric with adhesive tape or thumbtacks, but with this method, the unfixed center part shifts slightly each time it marks the color lake and moves. However, in the case of patterns of two or more colors, the patterns often do not match, making it unsuitable for actual use.

The present invention has been made in view of such conventional circumstances.

In other words, as mentioned above, the present inventor focused on the acrylic resin-based permanent adhesive, which is superior in various respects to the water-soluble adhesive temporary adhesive, and reexamined this permanent adhesive, and found that: We discovered that many of the drawbacks were due to the excessive adhesive strength of the acrylic resin polymer.
This seems to be because up until now, the main focus has been on how strongly to stick the printed fabric to the printing table, which is a matter of course when talking about adhesives, and researchers have not paid much attention to them. From this point of view, the present invention uses silicone resin with excellent releasability as the main adhesive as a adhesive, and uses a material with good adhesiveness to supplement or add adhesiveness to the silicone resin. This is a mixture of resins.

This makes it possible to provide an ideal permanent adhesive that overcomes not only the shortcomings of water-soluble adhesive temporary adhesives but also the drawbacks of acrylic resin polymers. The silicone resin used in the present invention is not particularly limited, but silicone rubber is preferred.

For example, silicone rubber SH- manufactured by Toray Silicone Co., Ltd.
4280, Sealand SH-792, ADDIT・EZ
-1 etc. are mentioned. As the resin having good adhesive properties used in the present invention, a wide variety of known adhesive resins can be used, except that the resin is limited in terms of compatibility with silicone resins.

For example, the above-mentioned acrylic resin polymer can be mentioned. This resin is a polymer of various acrylic acids or a polymer of methacrylic acid ester such as methyl, ethyl, isobutyl, n-butyl methacrylate, etc., and has strong adhesive properties and has good adhesion to rubber. show. In addition, when directly applied to a metal printing table, adhesion to metal is very good. Specific examples include PT-Wax EM, PT-Wax ES, and the like manufactured by Sanyo Color Co., Ltd. In the present invention, the blending ratio of silicone resin and adhesive resin varies depending on the type of adhesive resin (adhesive strength), but preferably 5 to 300 parts by weight of adhesive resin to 100 parts by weight of silicone resin. is 30
~300 parts by weight is preferable. The reason for this is that if the amount is 5 parts by weight, the adhesive strength as a adhesive will be too weak, causing problems.
On the other hand, if it exceeds 300 parts by weight, the adhesive force is too strong, causing problems similar to those of conventional adhesives made of acrylic resin polymers, which is undesirable. When blending, it is advisable to add an appropriate solvent to adjust the viscosity and other properties to facilitate the coating operation.

Examples of solvents include trichloroethane, tetrachloroethane, trichloroethane, methylene chloride, ethylene chloride, chloroform, methyl formate, ethyl acetate, butyl acetate, acetic acid, methanol, ethanol, ethylene glycol, diethyl ethanol, dioxane. , toluene, xylene, hexane, V・M・Sp・naphtha, mineral spirit, white mineral oil, acetone, methyl ethyl ketone,
Trichloromonochloromethane, trichlorotrichloroethane, etc. can be used. Other additives such as plasticizers, fillers, and hardening agents may be added as necessary. Examples of plasticizers for acrylic resins include dimethyl phthalate, diethyl phthalate, dibutyl phthalate, butylbenzyl phthalate, and polypropylene adipate. As the filler, powdered silica, poppy seeds, algae, calcium carbonate, clay, graphite, antimony oxide, titanium oxide, etc. may be used. As curing agents for silicone resins, conventionally known curing agents may be used, such as organic metal salts, etc., and the amount used is not particularly limited, as long as it gives the resin desirable properties as a adhesive. Bye. The specific method of blending each component in the present invention is not particularly limited, but for example, silicone resin, adhesive resin, solvent, curing agent, etc. may be kneaded together to obtain the desired adhesive; A mixture of silicone resin and a solvent, etc., and a mixture of adhesive resin and the like are made separately in advance, and both are mixed together before use.
The desired adhesive may be obtained.

Next, examples of the present invention will be shown. Example 1 First, a silicone resin mixture is prepared according to the following formulation.

Silicone rubber (manufactured by Toray Silicone)...
...10 parts by weight 1,1,1 trichlorethane
...10 parts by weight hardening agent (manufactured by Torre Silicone).・・・．・・0. Next, an adhesive resin mixture is prepared using the following formulation.

Butyl methacrylate polymer (degree of polymerization 5,000 to 10,000) 94 parts by weight 1,1,1-tric.

Ruethane.・・・． ...21 parts by weight By putting both of the above-obtained mixtures into a mixer equipped with a rotary blade, a drum lo-fu, a shaking mixer, etc., and turning or shaking them to make hawk bran. , a permanent adhesive which is the object of the present invention was obtained.

Example 2 Silicone rubber (manufactured by Toray Silicone) 10 parts by weight Curing agent (manufactured by Toray Silicone) 0.75
Part by weight Butyl methacrylate 1':mer (degree of polymerization 500
0-10000). ．．・．． ．．・5 parts by weight of 1,1,1-trichloroethane.・・・． ...20 parts by weight of the above formulations were combined, and in the same manner as in the above example,
For example, by putting it into a mixer equipped with a rotary blade, a drum loaf, a shaking mixer, etc., and kneading it by rotating or shaking it, the permanent adhesive that is the object of the present invention can be obtained. I got it.

In order to compare the adhesive of the present invention obtained as described above with a conventional acrylic resin adhesive (New Dyn T, manufactured by Yokohama Polymer), a printing test was conducted under the following conditions.

Printing conditions Printing table: Hand screen inclined iron plate printing table Surface temperature: Printing fabric for 4y0 test: Polyester crepe georgette, wool, and other various fabrics Mixture of base paste for testing CMC (Sanyo Pulp) Manufactured by Sunrose PNo. 9...7 parts by weight Sodium chlorate...1 Malic acid
...0.3 Water ...91
．． 7〃Colored glue combination The above base glue...
70 weight part disperse dye (DianixBI Crotch BGFS)
・・・20″ water ・・・2
80〃Color glue viscosity...2000 ps (2pm, 2
5qo) Under the above conditions, firstly, the hand screen was installed separately on a steel plate stand, and the adhesive of the present invention and the adhesive adhesive of the present invention, Nudyn T, were applied, and then polyester crepe georgette and wool were applied. etc. were grounded.

After this, a screen frame with an appropriate pattern was placed on top of crepe georgette, wool, etc., and colored paste was printed on top of it. After drying the colored paste, crepe georgette, wool, etc. were rolled up, steamed, and dyed. After this dyeing, it was washed with water to remove color paste, unfixed dye, etc. The following results were obtained from this printing test.

[A] Even if the color paste that has penetrated to the back side of the fabric to be printed comes into contact with the adhesive, the adhesive strength of the adhesive is properly adjusted by kneading the silicone resin, and the silicone resin itself has good releasability. Therefore, when the fabric to be printed is peeled off, the color paste does not adhere to the adhesive and is almost completely peeled off together with the fabric to be printed.

In other words, there were almost no occurrences of defective products due to "glue flying". Even for ultra-thin fabrics with a large amount of colored glue penetrating into the back side,
There was no occurrence of "glue flying". On the other hand, in the case of conventional acrylic resin-based adhesives, "glue skipping" occurred quite frequently. {o- Because the colored paste was completely attached to the fabric to be printed and then peeled off, the amount of colored paste adhered to the fabric to be printed was maintained uniformly, and no uneven color development appeared. Therefore, it is easy to obtain even beams even for large designs, which have been considered difficult in the past, and printing is easy. On the other hand, in the case of conventional acrylic resin-based adhesives, a considerable portion of the color paste adheres to the adhesive and is removed to the adhesive, resulting in an uneven amount of color paste adhering to the fabric being printed. The coloring was uniform and the coloring was extremely uneven. Since the colored paste was completely attached to the cloth to be printed and then wound up, there was naturally no contamination due to adhesion of the colored paste on the printing stand.

For this reason, if the prints were of the same pattern, the trouble of cleaning the printing table was saved, and the workability was extremely good. On the other hand, in the case of conventional acrylic resin-based adhesives, it was difficult to clean the adhered colored paste, and the workability was extremely poor because it was necessary to wait for drying after cleaning. W Even if dust or threads floating in the air adhere to the adhesive, they can be easily and completely removed by washing with water, so the product has a long service life.

On the other hand, in the case of conventional acrylic resin-based adhesives, the adhesive force is strong and it is difficult to completely remove them by washing with water, resulting in a short service life. Target: Even if the fabric to be printed is hairy, such as wool, it can be reused by simply cleaning the printing table after each printing, and it can be used many times without applying a new adhesive.

On the other hand, in the case of conventional acrylic resin-based adhesives, hairs adhered so strongly that they became unusable after approximately one use. N
When spreading the adhesive on the printing table with a squeegee, etc., even if the squeegee's movement is temporarily stopped and some unevenness is created in that area, it is extremely easy to apply another coat on top of it. I was able to get a smooth surface.

This makes it extremely easy to apply the adhesive, which conventionally required many years of experience and great skill. On the other hand, in the case of conventional acrylic resin-based adhesives, once irregularities were formed, it was impossible to correct them no matter how many times they were applied.
Kawa: Once the fabric to be printed is stretched with its grain curved, the adhesive strength is weak due to the kneading of the silicone resin, and the peeling is good, so it is easy to tear off and re-stretch.

In other words, it was easy to correct the "curved grain" and prevent the occurrence of defective products. In contrast, in the case of conventional acrylic resin,
Although it can be said to be easier to repair than water-soluble glue, it was quite difficult due to its strong adhesive properties. This was especially difficult with thin fabrics that were wide, long and stiff. Of course, since the adhesive does not penetrate into the fabric to be printed like water-soluble glue does, there was no such thing as ``Yuki Gaeshiichi''.

Regarding this point, the same applies to conventional acrylic resin adhesives. Skin Even in the case of different patterns, the printing machine can be used repeatedly for about 1 to 6 months, depending on the frequency and various conditions, by simply washing with water and using the same printing table, making it extremely economical.

On the other hand, in the case of conventional acrylic resin-based adhesives, they can of course be used many times as a permanent adhesive, but as mentioned above, due to their strong adhesive strength, dust in the air, thread shoulders, etc.
Because it is susceptible to the effects of hair on the fabric being printed, it could not be used for as long as the adhesive of the present invention. As is clear from the above description, according to the present invention, a silicone resin with excellent releasability is used as the main ingredient, and a resin with good adhesive properties, such as a resin with good adhesive properties, is added to the silicone resin to supplement the adhesive properties of the silicone resin or to provide adhesive properties. Because it is a mixture of acrylic resin polymers, it has good releasability and moderate adhesion, as well as the shortcomings such as the temporary adhesive of water-soluble glue and the method of fixing both edges of the printed fabric. Moreover, it is possible to provide an ideal permanent adhesive that also improves the drawbacks of conventional permanent adhesives made of synthetic resin polymers.

Claims (1)

[Claims] 1. A textile printing base agent, characterized in that it is made by mixing and kneading 5 to 3,000 parts by weight of an adhesive acrylic resin polymer with 100 parts by weight of a silicone resin rubber.