Alcohol-soluble two-component polyurethane adhesive (below)

Alcohol-soluble two-component polyurethane adhesive application test

Take alcohol-soluble two-component polyurethane adhesive produced by Huzhou Europe and the United States Chemical Co., Ltd. as an example, there are currently three varieties: high solid content, general-purpose adhesive AG-1070A/B; high solid content, high-strength adhesive AT- 6070A/B: High solid content, aluminized film adhesive AV-8070A/B. In addition, there is also a corresponding high initial viscosity adhesive. These adhesive products meet the requirements of customers for plastic/plastic, plastic/aluminum, paper/aluminum, and VMCPP, VMPET and other packaging structures. They have been widely used in the production of pharmaceuticals, biscuits, instant noodles, dried fruits, puffed foods, and tea products. Flexible packaging.

The following is a test of the application characteristics of these alcohol-soluble two-component polyurethane adhesives.

1. AG-1070A/B

The appearance of AG-1070A/B is light yellow or colorless and transparent, and the solid content is 70%±2%. The ratio of AG-1070A to AG-1070B=6:1.

Test conditions: 1 Adhesive: working concentration 25%, viscosity of 14.6s/25°C, sizing amount 2.1g/m2; 2 compound conditions: Japan Fuji composite machine, compound speed 100m/min, drying temperature 60°C, 70°C, 85°C, compound roll temperature 60°C; 8 curing conditions: aging temperature 40°C, aging time 24 hours.

Measure the peel strength of the composite film sample. The results are shown in Table 1.

2.AT-6070A/B

AT-6070A / B appearance was pale yellow or colorless, solid content of 70% ± 2%, the ratio of AT-6070A: AT-6070B = 6:1.

Test conditions: 1 Adhesive: working concentration 25%, viscosity 14.6s/25°C gluing amount 2.1g/m2; 2 compound conditions: Japan Fuji composite machine, compound speed 100m/min, drying temperature 60°C, 70°C, 85 °C, composite roll temperature 60 °C; 3 curing conditions: aging temperature 40 °C, aging time 24 hours.

The peel strength of the composite film sample was measured and the results are shown in Table 2.

3. AV-8070A/B

The appearance of AV-8070A/B is light yellow or colorless and transparent, and the solid content is 7D%±2%. The ratio is AV-8070A: AV-2070B=16:1

Test conditions: 1 Adhesive: Working concentration 25%, viscosity 15.4s/25°C, glue amount 1.9g/m2: 2 Compound conditions: Japanese Fuji composite machine, compound speed 100m/min, drying temperature 60°C, 70°C, 85 °C, composite roll temperature 60 °C; 2 curing conditions: aging temperature 40 °C, aging time 24 hours.

The peel strength of the composite film sample was measured and the results are shown in Table 3.

With the rapid development of China's economy and the continuous improvement of the people’s living standards, the environmental protection issues of composite film packaging have received increasing attention. With their own R&D efforts, European and American chemical companies have not only completely replaced the imported alcohol-soluble adhesives, but also have driven them. The industry’s emphasis on environmentally friendly products. In recent years, some domestic manufacturers have begun to produce alcohol-soluble adhesives, such as the Beijing Chemical Research Institute, Zhejiang New Oriental, etc. It has already formed a market scale of about 1,000 tons, and its market coverage will surely continue to increase in the future.

Author/Zhang Xiaotao Huzhou Europe and the United States Chemical Co., Ltd.

Source: Printing Technology