Aluminized composite film adhesive research (2)

2.2 Effect of material properties and aging conditions on peel strength

Three different thicknesses of the film are compounded and cured under different conditions. The peel strength is shown in Table 1 (unit: N/15mm).

Note: In Table 1, aging 1 refers to the storage time at around 50°C. CPP pull-off 2 means that most of the tested samples are broken. The measured peel strength data is 3.5 to 6.4 N/mm.

It can be seen from the table that the YH501SL/VM10 adhesive has a higher initial tack; composite films with different thicknesses have slightly different peeling strengths; the film thickness is larger and the peeling strength is also slightly larger. After 24 hours aging, the peel strength was very high. The peeling strength reached its maximum after aging for 48 hours, and the aging strength continued to decrease, and the aluminum plating layer was partially transferred. It is recommended not to exceed 48h during aging at 50°C.

2.3 Effect of coating amount

The effect of composite film composites is not only influenced by the amount of adhesive applied, the aging temperature and the time, but also related to factors such as the temperature of the production environment, the composite temperature, and the tension control of the film. Effect of curing temperature and time As discussed above, the effect of coating weight on the peel strength of full-print BOPP/VMCPP is shown in Table 2.

It can be seen from the table that when the coating amount is more than 2.0 g/m2, the peel strength of YH501SL/VM10 composite full-print BOPP/VMCPP reaches and exceeds that of YH501S and imported glue D[1], but if the peel strength is maximized, The recommended coating amount is not less than 3.0g/m2.

2.4 Influence of the amount of curing agent

See Table 4 for the results of the peel strength of YH501SL and VM10 with different mass ratios (with different -OH/-NCO).

2.5 Water resistance

YH501S and imported rubber D are not resistant to boiling in 100°C [1]. The three composite films of YH501SL compounded were matured at 50° C. and boiled in 100° C. boiling water. The peel strength was measured immediately after boiling. The results are shown in Table 5.

According to the data in the table, the YH501SL/VM10 composite film adhesive has good boiled performance, but different films have different boiling resistance properties: the smaller the thickness of the film used, the better the resistance to boiled water.

According to the data in the table, the YH501SL/VM10 composite film adhesive has good boiled performance, but different films have the same boiled water resistance; the smaller the film thickness, the better the boiled water resistance effect.

2.6 Plastic-plastic compound

After YH501SL was used for compounding PET/PEP, PET/CPP and NNNY/PE composite films, the peel strength was measured after aging at 50°C for 48 hours. The results are shown in Table 6.

Table 6: YH501SL/VM10 also has strong composite strength for plastic composites. After aging for 48 hours, the composite strength of PET/PE can reach 4.58N/15mm; the composite strength of PET/CPPR can reach 4.78n/15mm; NY/ The composite strength of PE can reach 5.56N/15mm.

As can be seen from the table, YH501SL is used for plastic-plastic composites and has a high peel strength.

2.7 Performance Comparison

The performance comparison of YH501S, imported rubber D and YH501SL is shown in Table 7.

Table 7: From the experimental data, we can see that under normal conditions, the composite peel strength of YH501SL/VM10 is greater than 3N/15mm, YH501S is between 1.8-2.2N/15mm, and imported glue D is only 1.4-1.6N/15mm. Only YH501SL/VM10 can withstand boiling at 100°C, showing that YH501SL/VM10 performs better than YH501S and imported adhesive D.

As can be seen from the table, the YH501SL performs better than the YH501S and imported glue D.

2.8 Solvent Residue

According to the YY0236-1996 compound film for pharmaceutical packaging (General) 5.5 Solvent Residual Quantity Test Solvent Residual Quantity Test The remaining amounts of ethyl acetate and toluene and the solvent residuals calculated therefrom are shown in Table 8.

3 Conclusion

Through the adhesive composition, molecular structure, molecular weight distribution design and control, developed the excellent performance of aluminum alloy composite film adhesive YH501SL; the adhesive used in aluminum composite film has good initial tack, excellent peel strength and boiling resistance For plastic-plastic composite also has a high peel strength.




Jiang Qinjun Shen Feng 1,2 Wang Ziping Zhang Xudong 1 Yu Yuanyuan 1 Peng Yuhong 1 Deng Yudong 1

(1 Beijing Gaomeng Chemical Co., Ltd., Beijing Institute of Fine Chemicals, Beijing Academy of Modern Sciences