First, the background of the popularity of biodegradable plastics
The degree of deterioration of the "Earth Environment" has already begun to threaten the living environment of human beings. Now we are faced with the question of how we can work hard in our lifetime so that our children and grandchildren can live on a healthy planet.
“What can ink manufacturers do to reduce the global environmental burden?†One of the recommendations for this issue is to use biodegradable gravure inks.
Disposing of plastics in the natural environment will cause them to accumulate in the natural world. If they are burned, carbon dioxide gas that causes global warming will be accompanied by environmental problems.
Second, the composition of biodegradable ink
At present, biodegradable plastics that can be degraded by the action of microorganisms and can be incorporated into the natural material circulation system are receiving attention and are about to enter the popularization stage. The use of biodegradable plastics derived from plant raw materials has attracted attention because it can solve the problem of limited oil resources and is used as a recycling material for sustainable use.
At present, the printing method adopted by Japan for printing on plastic films is mainly gravure printing. Gravure inks used in printing are widely used, and basically consist of three components: a colorant (pigment), a color-developing material (a color-developing material = a decanter + a solvent), and an additive (auxiliary agent).
A biodegradable resin is added to the above composition, which is defined as a biodegradable gravure ink.
The mechanism of biodegradation is influenced by the environment. Although it cannot be summarized in one case, it can be degraded by the enzyme of the microorganism. Degradable polymer (matrix) is not degraded by any microorganism, it depends on the particularity of the microorganism.
Third, printing and biodegradability
Prints printed with non-biodegradable gravure inks do not suffer from shape changes, weight loss, etc., even when placed in a biodegradable environment. Therefore, they can be predicted to be used in composting equipment in a natural environment. It does not degrade and becomes a big problem.
1. Pigments and Biodegradability
The pigment used as a colorant is a non-biodegradable particle of 1 μm or less. It has now 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 a film formed of a dried polymer of a resin polymer centered on a pigment, thereby impairing the number of "microbial movements" and the antibacterial effect due to the pigment.
2. Polyisocyanate crosslinking E and biodegradability
Polyisocyanate is used as an improver for adhesion, print resistance, etc. of inks, but the biodegradability of prints printed with the addition of polyisocyanate to the ink may be postponed. If it is more, it will not have biodegradability.
Fourth, the design of ink
The general distinction of the inks for thin-film printing produced by Japan Dainichi Seiki Co., Ltd. is shown in Table 2.
V. Expansion of use and future development
The following are properties obtained using biodegradable materials.
Biodegradable plastic films have been applied to packaging, labels, agriculture and many other aspects. In Japan, it is widely used because it can be used for many purposes such as garbage bags and agriculture. Polylactic acid resin is a product that is restricted in hygiene consultations such as polyolefins. Therefore, it is used in the food packaging field where vegetables, sandwiches, and rice balls (13 types of foods) have a short shelf life after PL registration. Although the price of materials will increase, enterprises that actively pay attention to environmental protection have begun to use it, and it is expected that there will be a wide range of applications.
In 13 books, information on biodegradable plastics for end consumers is not enough. There are still cases of unclassified household wastes, and thus they have not yet been effectively used. These are actual situations. However, in the case of biodegradable plastics derived from plants, carbon dioxide gas will be incorporated into the continuous circulatory system. Although carbon dioxide gas will not be reduced, it will not be increased. Therefore, it is expected to be actively adopted.
Since this idea also applies to printing ink resins, the ink industry is also seriously committed to shoulder this responsibility. This does not refer to the fixed concept of using biodegradable inks in biodegradable plastics. Instead, it actively promotes the use of biodegradable inks, regardless of whether the printed materials are “having†or “not possessing†biodegradability. . It can be predicted that in the near future, we will enter into an era of continuous recycling materials in inks.
Although the amount of carbonated gas produced during the combustion process of printing ink resins is very low, it will still impose a burden on the environment. This requires us to make meticulous and meticulous efforts to cope with all this.
The degree of deterioration of the "Earth Environment" has already begun to threaten the living environment of human beings. Now we are faced with the question of how we can work hard in our lifetime so that our children and grandchildren can live on a healthy planet.
“What can ink manufacturers do to reduce the global environmental burden?†One of the recommendations for this issue is to use biodegradable gravure inks.
Disposing of plastics in the natural environment will cause them to accumulate in the natural world. If they are burned, carbon dioxide gas that causes global warming will be accompanied by environmental problems.
Second, the composition of biodegradable ink
At present, biodegradable plastics that can be degraded by the action of microorganisms and can be incorporated into the natural material circulation system are receiving attention and are about to enter the popularization stage. The use of biodegradable plastics derived from plant raw materials has attracted attention because it can solve the problem of limited oil resources and is used as a recycling material for sustainable use.
At present, the printing method adopted by Japan for printing on plastic films is mainly gravure printing. Gravure inks used in printing are widely used, and basically consist of three components: a colorant (pigment), a color-developing material (a color-developing material = a decanter + a solvent), and an additive (auxiliary agent).
A biodegradable resin is added to the above composition, which is defined as a biodegradable gravure ink.
The mechanism of biodegradation is influenced by the environment. Although it cannot be summarized in one case, it can be degraded by the enzyme of the microorganism. Degradable polymer (matrix) is not degraded by any microorganism, it depends on the particularity of the microorganism.
Third, printing and biodegradability
Prints printed with non-biodegradable gravure inks do not suffer from shape changes, weight loss, etc., even when placed in a biodegradable environment. Therefore, they can be predicted to be used in composting equipment in a natural environment. It does not degrade and becomes a big problem.
1. Pigments and Biodegradability
The pigment used as a colorant is a non-biodegradable particle of 1 μm or less. It has now 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 a film formed of a dried polymer of a resin polymer centered on a pigment, thereby impairing the number of "microbial movements" and the antibacterial effect due to the pigment.
2. Polyisocyanate crosslinking E and biodegradability
Polyisocyanate is used as an improver for adhesion, print resistance, etc. of inks, but the biodegradability of prints printed with the addition of polyisocyanate to the ink may be postponed. If it is more, it will not have biodegradability.
Fourth, the design of ink
The general distinction of the inks for thin-film printing produced by Japan Dainichi Seiki Co., Ltd. is shown in Table 2.
V. Expansion of use and future development
The following are properties obtained using biodegradable materials.
Biodegradable plastic films have been applied to packaging, labels, agriculture and many other aspects. In Japan, it is widely used because it can be used for many purposes such as garbage bags and agriculture. Polylactic acid resin is a product that is restricted in hygiene consultations such as polyolefins. Therefore, it is used in the food packaging field where vegetables, sandwiches, and rice balls (13 types of foods) have a short shelf life after PL registration. Although the price of materials will increase, enterprises that actively pay attention to environmental protection have begun to use it, and it is expected that there will be a wide range of applications.
In 13 books, information on biodegradable plastics for end consumers is not enough. There are still cases of unclassified household wastes, and thus they have not yet been effectively used. These are actual situations. However, in the case of biodegradable plastics derived from plants, carbon dioxide gas will be incorporated into the continuous circulatory system. Although carbon dioxide gas will not be reduced, it will not be increased. Therefore, it is expected to be actively adopted.
Since this idea also applies to printing ink resins, the ink industry is also seriously committed to shoulder this responsibility. This does not refer to the fixed concept of using biodegradable inks in biodegradable plastics. Instead, it actively promotes the use of biodegradable inks, regardless of whether the printed materials are “having†or “not possessing†biodegradability. . It can be predicted that in the near future, we will enter into an era of continuous recycling materials in inks.
Although the amount of carbonated gas produced during the combustion process of printing ink resins is very low, it will still impose a burden on the environment. This requires us to make meticulous and meticulous efforts to cope with all this.
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