Development Direction of China's Flexible Packaging Adhesives

At present, the adhesives used in the flexible packaging industry include one-component polyurethane adhesives, two-component polyurethane adhesives, acrylic adhesives, solvent-free adhesives, alcohol-soluble, water-soluble polyurethanes.

Ester adhesives, etc. The development of China's flexible packaging industry is closely linked with the technological progress of domestic two-component polyurethane adhesives. At present, domestic two-component polyurethane adhesives for flexible packaging

With a production capacity of nearly 50,000 tons, ordinary adhesives and some functional adhesives can be fully domesticated. 75% solids two-component polyurethane adhesives occupy 60% market share, 50% solids

The market for the content of two-component polyurethane adhesives is shrinking, but it still occupies more than 30% of the market. In the market of special adhesives less than 10%, imported adhesives still have an advantage. Domestic adhesive

The company has matured, its technology development capabilities have been greatly enhanced, and its products have become more functional, accounting for more than 80% of the domestic market share. Competition in the market has also shifted to a meager and orderly stage.

Such as Beijing Gaomeng Chemical Co., Ltd., Beijing Chemical Industry Research Institute, Zhejiang New Oriental Ink Group Co., Ltd., Guangdong Kangshan Chemical Co., Ltd., Jiangsu Jintan City Adhesive Factory and other cities.

Leading companies on the field, these companies have the ability to develop and produce functional adhesives on their own and have been validated in the market. China's flexible packaging materials mainly dry compound, dry compound

The rapid development of materials has brought about tremendous changes in the packaging industry and has gained enormous economic and social effects. The two-component polyurethane adhesive used in this composite process is mature and the price

The disadvantage is its low cost, which is caused by the emission of a large amount of solvent to pollute the environment. In addition, during the compounding process, trace amount of residual solvent remains in the substrate, and in severe cases, an odor is generated in the package. Environment and hair

The exhibition has become a major concern in the world today. Countries have set off a revolution in protecting the environment and reducing pollution. In this context, traditional polyurethane adhesives have been unprecedentedly

The challenge is that foreign companies have also introduced environmentally friendly adhesives to the Chinese market, and domestic forward companies have also conducted extremely meaningful explorations of environmentally friendly adhesives. In a long period of time, polyurethane

Adhesives will still occupy most of the market share in China, and the amount of solvent-free adhesives will increase significantly in the short term, but it will not have much development. The reason, in addition to the current solvent-free adhesive

The performance, price, or equipment investment cost of the mixture, alcohol-soluble, water-soluble, etc. are not as good as those of the existing two-component polyurethane adhesives. The base film materials and equipment conditions for domestic production cannot be completed yet.

In addition to meeting the coating requirements and drying requirements for alcohols and water-based adhesives, the actual national conditions in China are a reason that cannot be ignored. At present, China has introduced more than 30 solvent-free production lines.

Most companies are in production and semi-discontinued state, and companies with solvent-free production lines are working hard to transfer some products to solvent-free equipment, which will expand the application of solvent-free adhesives, but

Expensive equipment investment has become overwhelming for companies. In recent years, the introduction of domestic solvent-free production lines has significantly weakened. Soft packaging companies and adhesive manufacturers cannot blindly catch up with the new wave.

We must establish a new way to ensure the smooth and healthy development of China's flexible packaging industry based on our national conditions and seeking truth from facts, so that environmental resources can be effectively protected. Effective solution

Some environmental issues that are urgently needed to be resolved and that are capable of solving, such as: Do not use one-component polyurethane adhesives, eliminate the emission of toluene, reduce the use of 50% of the binder, and improve the coating work.

Degree, to further reduce the volatilization of ethyl esters. Domestic high-concentration working concentration coating technology is not very good, general companies are best to only 35% coating, in addition to high transparency requirements

Products, polyurethane adhesives can generally increase the working concentration to 40% to 45%, which is very significant for reducing the volatilization of ethyl ester, protecting the environment and reducing costs. Adhesive company must

Must cooperate closely with equipment manufacturers and roller manufacturers to help composite companies improve coating technology. Adhesive companies should focus on the development of water-based, solvent-free adhesives, alcohol-soluble adhesives

The agent is just an over-the-piece product. It is not an environmentally friendly product in the true sense. Its application is limited, and its application volume in the foreign flexible packaging market is also very small. Domestic adhesive production companies should use

Advantages of two-component polyurethane adhesives, focused efforts on the development of functional blends, and expansion of greater market space.
The most recent functional adhesives that have been successfully introduced on the market today are: 1. Fast-curing adhesives. After the general two-component adhesive is compounded, it should be placed in an environment of about 50 degrees.

More than 48 hours, then can be taken out to cut bags, reduce production efficiency, and can not meet the fierce market competition requirements. Fast-curing adhesives only need to be placed in a 50-degree environment

4-8 hours can be cut, but due to the presence of the intensity of aging, the composite film becomes brittle shortcomings, has not yet entered the market, rapid curing station mixture from the 2000 truly took the market. 2

, Anti-chemical media erosion adhesive. In this regard, Henkel Corporation still occupies a large advantage, especially in the packaging of liquid pesticides, it is understood that in the food and cosmetics, domestic adhesives have been able to

Provides acid-resistant, alkali-resistant, salt-resistant, anti-pungent, oil-resistant, perfume-resistant, surfactant-resistant adhesives. 3. Adhesive with high additive content film composite. With the wide application of composite flexible packaging

The requirements for packaging materials have become more and more diversified. A variety of functional auxiliaries have been added to the manufacture of thin films, but the addition of a large number of functional auxiliaries has brought new problems.

The method satisfies the requirement of composite strength. After aging with an ordinary adhesive, the drop in strength is very obvious and even cannot be used. In addition, the development of dry compound radiation or UV curing polyurethane batch

It is also a hot spot for future development.