Background and composition of popularization of biodegradable gravure ink

2024-04-11 22:06:05

1. Background of popularization of biodegradable plastics

The degree of deterioration of the "global environment" has begun to threaten the living environment of human beings. Now we are faced with the problem of how to work hard in our lifetime, so that our children and grandchildren can live on a healthy earth.

"What can ink manufacturers do to reduce the burden on the earth?" One of the recommendations for this question is to use biodegradable gravure inks.

Disposal of plastics in the natural environment will cause them to accumulate in the natural world. When they are burned, they will be accompanied by the generation of carbon dioxide gas that causes global warming, which will cause certain environmental problems.

Second, the composition of biodegradable ink

At present, biodegradable plastics that can be degraded by the action of microorganisms and can be integrated into the natural material circulation system are receiving much attention and are about to enter the stage of popularization. The use of biodegradable plastics derived from plant raw materials has attracted attention as a sustainable recycling material because it can solve the problem of limited petroleum resources.

At present, the printing method used for printing on plastic films in Japan is mainly gravure printing. The gravure ink used in printing is widely used and basically consists of three components: colorant (pigment), color development material (color development material = tree month purpose + solvent) and additive (auxiliary).

Adding biodegradable resin to the above components is defined as biodegradable gravure ink.

The mechanism of biodegradation is affected by the environment. Although it cannot be described in a general way, it can be degraded by microbial enzymes. The degradable polymer (matrix) is not degraded by any microorganisms, it depends on the particularity of microorganisms.

3. Printing and biodegradability
The printed matter printed with bio-non-degradable gravure ink will not change shape and weight even if it is placed in an environment conducive to biodegradation, so it can be predicted that it will also be used in composting equipment under natural environment. It will not degrade, which becomes a big problem.

1. Pigments and biodegradability
The pigment used as the coloring agent is bio-non-degradable particles of 1 Î¼m or less. It has been confirmed that this pigment sometimes delays the biodegradability of the resin in the ink. It can be inferred that this is because the printed ink layer is formed by a dried resin polymer with pigment as the core to form a film, which hinders the movement of several "microorganisms, and has an antibacterial effect due to the pigment.

2. Polyisocyanate crosslinkability E and biodegradability

Polyisocyanate is used as an improver for ink adhesion and printing durability, but the biodegradability of printed products printed with polyisocyanate added to the ink will be delayed. If the amount is large, it is not biodegradable.

4. Ink design

The difference between the inks used for film printing trial-produced by Japan Nissei Industry Co., Ltd. is shown in Table 2.

V. Expansion of use scope and future development

The following are the properties obtained using biodegradable materials.

Biodegradable plastic film has been applied to many aspects such as packaging, labeling, agriculture and so on. In Japan, garbage bags and agricultural subsidies can be used in many ways, so they are widely used. Polylactic acid resin is a restricted item in health consultation meetings such as polyolefins. Therefore, it has been promoted and used in the field of food packaging with short shelf life such as vegetables, sandwiches, and rice balls (13 types of food) after registration through PL. Although the price of materials will increase, companies that are actively concerned about environmental protection have begun to use it, and it is expected that there will be a wide range of promotion and application.

In 13 books, the information about biodegradable plastics for end consumers is not enough, and there are still cases where household waste is not classified, so it has not been effectively used. These are the actual conditions. However, in the case where biodegradable plastics come from plants, carbon dioxide gas will be integrated into the continuous circulation system. Although carbon dioxide gas will not be reduced but will not increase, it is expected to be actively adopted.

Since this concept also applies to resins for printing inks, the ink industry is also seriously committed to taking on this important task. This does not refer to the fixed concept of using biodegradable inks in biodegradable plastics, but it actively promotes the use of biodegradable inks regardless of whether the printed material is â€œhasâ€ or â€œhas notâ€ biodegradability. . It can be predicted that in the near future, it will enter an era of using continuous recycling materials in inks.

Although the amount of carbon dioxide gas produced by the printing ink resin during combustion is very low, it still causes a burden on the environment, which requires us to make unremitting efforts to deal with all this.

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