A composite film for liquid medicine packaging and its dry composite process

Abstract

The invention discloses a liquid medicine packaging composite film and its dry composite process, which solves the problem that in the existing dry composite process, due to incomplete solvent removal or moisture entering during the solvent removal process, the composite film is easily caused to foam and affect The binding force between the composite films and the problem of increasing solvent residues, the present invention includes: (1) open the dry composite machine and the induced draft fan, the movement of the guide roller drives the operation of the flow aid in the drying tunnel, and preheats the drying tunnel to make it reach Preset temperature; (2) Glue coating of the outer layer film; (3) After the glue coating is completed, the outer layer film enters the drying tunnel for solvent volatilization; (4) The outer layer film and the barrier layer film are combined to obtain the outer layer-barrier film intermediate product (5) heat-sealing layer film gluing; (6) after the gluing is completed, enter the drying tunnel for solvent volatilization; (7) compound the outer layer-barrier film intermediate product and the heat-sealing layer film to obtain a liquid drug packaging composite film . The invention has the advantages of fast solvent volatilization, good water removal in the drying tunnel and the like.

Description

technical field

[0001] The invention relates to the technical field of liquid medicine packaging composite films, in particular to a liquid medicine packaging composite film and a dry compounding process thereof. Background technique

[0002] Due to the higher requirements on barrier properties of liquid medicines, the main packaging currently used is still thicker glass bottles, plastic bottles or plastic tubes made of composite hard sheets with better barrier properties.

[0003] For the composite film, due to the thin film layer, to meet the use of liquid medicine packaging, the requirements for the composite process are higher.

[0004] First, for the structure of the composite film, it is required that the outer layer has good weather resistance, the middle layer has good barrier properties, and the inner layer has good heat sealing performance, and the bonding force between the film layer and the film layer is large.

[0005] In the compounding process, in order to ob...

Examples

Embodiment 1

[0069] Adopt the technology of the present invention to prepare PET-AL-CPP, and the technological process is as follows figure 1 shown, including the following specific steps:

[0070] 1. Printing:

[0071] Turn on the printing machine, place the corona-treated PET substrate on the inner layer in the unwinding section of the gravure printing machine, control the unwinding tension to 100N, and then enter the printing section, control the speed of the printing machine to 130m / min, and control the drying temperature at 60℃, control the printing roller pressure to 0.2Mpa and the printing blade pressure to 0.2Mpa, and print the outer layer of the PET substrate. Before printing, use ethyl acetate to adjust the ink viscosity to 13S. After printing, control the winding tension to 60N for winding. .

[0072] 2. Aluminum foil composite:

[0073] Transfer the PET base material printed on the outer layer to the unwinding part of the dry laminating machine, control the unwinding tension...

Embodiment 2

[0079] Example 2

[0080] It is investigated that the temperature of the drying tunnel and the compounding speed are both at the upper limit, that is, the temperature of the first drying tunnel 1 is 72-75 °C; the temperature of the second drying tunnel 2 is 78-80 °C, and the temperature of the third drying tunnel 3 is 88-90 ℃, when the compounding speed is also at the upper limit, that is, the compounding speed of PET and AL is adjusted to 150m / min, and the compounding speed of PET-AL and CPP is adjusted to 200m / min, the performance of the compound film.

Embodiment 3

[0082] Compared with Example 2, the third gear 7 is removed, so that the power drive of the flow aid guide roller 11 to the flow aid 4 is released, that is, the flow aid stops working, and the PET-AL-CPP composite film is obtained.

technical field

[0001] The invention relates to the technical field of liquid medicine packaging composite films, in particular to a liquid medicine packaging composite film and a dry compounding process thereof. Background technique

[0002] Due to the higher requirements on barrier properties of liquid medicines, the main packaging currently used is still thicker glass bottles, plastic bottles or plastic tubes made of composite hard sheets with better barrier properties.

[0003] For the composite film, due to the thin film layer, to meet the use of liquid medicine packaging, the requirements for the composite process are higher.

[0004] First, for the structure of the composite film, it is required that the outer layer has good weather resistance, the middle layer has good barrier properties, and the inner layer has good heat sealing performance, and the bonding force between the film layer and the film layer is large.

[0005] In the compounding process, in order to ob...

Examples

Embodiment 1

[0069] Adopt the technology of the present invention to prepare PET-AL-CPP, and the technological process is as follows figure 1 shown, including the following specific steps:

[0070] 1. Printing:

[0071] Turn on the printing machine, place the corona-treated PET substrate on the inner layer in the unwinding section of the gravure printing machine, control the unwinding tension to 100N, and then enter the printing section, control the speed of the printing machine to 130m / min, and control the drying temperature at 60℃, control the printing roller pressure to 0.2Mpa and the printing blade pressure to 0.2Mpa, and print the outer layer of the PET substrate. Before printing, use ethyl acetate to adjust the ink viscosity to 13S. After printing, control the winding tension to 60N for winding. .

[0072] 2. Aluminum foil composite:

[0073] Transfer the PET base material printed on the outer layer to the unwinding part of the dry laminating machine, control the unwinding tension...

Embodiment 2

[0079] Example 2

[0080] It is investigated that the temperature of the drying tunnel and the compounding speed are both at the upper limit, that is, the temperature of the first drying tunnel 1 is 72-75 °C; the temperature of the second drying tunnel 2 is 78-80 °C, and the temperature of the third drying tunnel 3 is 88-90 ℃, when the compounding speed is also at the upper limit, that is, the compounding speed of PET and AL is adjusted to 150m / min, and the compounding speed of PET-AL and CPP is adjusted to 200m / min, the performance of the compound film.

Embodiment 3

[0082] Compared with Example 2, the third gear 7 is removed, so that the power drive of the flow aid guide roller 11 to the flow aid 4 is released, that is, the flow aid stops working, and the PET-AL-CPP composite film is obtained.

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