The PE film blown with SF solvent-free special smooth opening masterbatch is suitable for the solventless composite products to be aged at relatively high temperature (such as 40 ℃), which effectively solves the problem of the increase of PE solventless composite friction coefficient in the industry. The test data are as follows:
[a number of solventless adhesives in the industry are used to test under different coating amounts and relatively high aging conditions, and the results show that the friction coefficient effect is ideal, which is enough to cover different use conditions, which shows the technical versatility of the case. ]
Test data 1
Blowing film: pe28 μ, corona layer and intermediate layer are low smoothness granular materials, hot seal formula: cartel 0274, SECCO 0220kj, Dow 5401j each 1 / 3, + 3.0sf open smooth masterbatch.
Solvent free composite: vmppet / pe28 μ, a domestic solvent-free adhesive 1 ?, glue amount 1.8g/m2, aging at 40 ℃ for 24h. The friction coefficient of the composite film is shown in Table 1.
Table 1 friction coefficient data of composite membrane
VMPPET/PE28μ
Solvent free special formula
Common PE
PE base film, US / UD
0.2/0.193
0.175/0.163
After ripening, US / UD
0.279/0.232
0.567/0.509
Change to a domestic solvent-free adhesive 2 ?, the coating amount is 1.5 g / m2, and the curing time is 24 h at 40 ℃. The friction coefficient of the composite film is shown in Table 2.
Table 2 friction coefficient data of composite membrane
VMPPET/PE28μ
Friction coefficient, US / UD
PE base film (18 days after blowing)
0.175/0.164
24 hours after ripening
0.258/0.224
Test after one day
0.237/0.229
Seven days later, the test was carried out
0.181/0.175
The friction coefficient data of a solvent-free adhesive with the largest market share in China is shown in Table 3 and table 4 after being aged at 40 ℃ for 24h and 48h with the adhesive amount of 1.65g/m2.
Table 3 friction coefficient data of composite membrane
Composite structure: pa15 μ / pe28 μ
Friction coefficient, US / UD
Pe28 μ substrate film
0.175∕0.177
The solvent-free composite membrane (PA ／ pe28 μ) was aged at 40 ℃ for 25 H (room temperature was 25 ℃)
Storage for 0 days
0.225∕0.236
Place for 1 day
0.213/0.216、0.216/0.217
Place for 2 days
0.249/0.227、0.224/0.225
Table 4 friction coefficient data of composite membrane
Composite structure: pa15 μ / pe28 μ
Friction coefficient, US / UD
Pe28 μ substrate film
0.175∕0.177
The solvent-free composite membrane (PA ／ pe28 μ) was aged at 40 ℃ for 48 h
(room temperature 25 ℃)
Storage for 0 days
0.266∕0.247
Place for 1 day
0.230/0.219、0.243/0.215
Place for 2 days
0.231/0.216、0.230/0.220
Place for 20 days
0.215/0.210、0.213/0.208
It can be seen that this product has better effect in solvent-free compounding of ultra-thin PE even under strict technological conditions.
Test data 2
Blowing film: pe45 μ, corona layer and intermediate layer are low smoothness granular materials, and heat sealing layer is medium smoothness granule + 2.5% SF solvent-free special smooth opening masterbatch.
Solvent free composite: pet12 μ / pe45 μ, a foreign brand solvent-free adhesive 4 ?, glue loading amount of 1.2g/m2 (estimated according to the cot speed of 55%), aged at 40 ℃ for 24 hours, the friction coefficient of composite film is shown in 5.
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