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Adhesive tape processing method in film production of slobbering machine

A disposal method and salivating machine technology, applied in the direction of coating, etc., can solve problems such as waste of materials, broken edges, and sticky tapes, and achieve the effects of improving operating efficiency, reducing commissioning costs, and eliminating sticky tapes

Active Publication Date: 2012-04-18
GUILIN ELECTRICAL EQUIP SCI RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the film production process of the salivating machine, the problem of liquid film sticking to the tape often occurs. Although the surface cleanliness of the steel strip is in the best state, the viscosity of the polyamic acid resin solution and the temperature of the drying tunnel are also in the optimal range, and the speed of the steel strip is in the best range. Within the normal range, it is still difficult to avoid the appearance of sticky tape
Especially when the extrusion die is used to directly form the resin solution on the steel belt to form a salivating liquid film, when the semi-finished film is peeled off, there may be sticky bands on the edges of both sides of the steel band. To a certain extent, it affects the continuous production and application of the dried film semi-finished products in the subsequent section
If the sticky tape cannot be resolved as soon as possible, the width and thickness of the sticky tape will accumulate every time the steel belt runs, resulting in broken edges on both sides or one side, which not only wastes materials, but also prevents the subsequent sections from entering normal production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Before driving in this example, clean the surface of the steel strip with tools such as copper shovel, copper ball, acetone, alcohol, and silk cloth, so that the surface of the steel strip (especially at the edge of both sides of the steel strip at about 100mm) is free of foreign matter such as solidified resin particles and impurities , adjust the viscosity of the polyamic acid resin solution to 51,800 centipoise, adjust the temperature in the drying tunnel to 200.0°C±2.0°C, and the hot air velocity to 35.0m / s±2.0m / s. 30~75μm, adjust the lip opening to 60μm when driving, the steel belt running speed adjustment range is 3.5~8.0m / min, set the steel belt speed to 5.0m / min when driving, start to salivate, the steel belt runs for a week, The peeling of the film was detected at the position of the steel belt of the front drum, and it was found that the width of the adhesive tape on both sides of the steel belt was 5.5mm, and the opening of the lips on both sides of the drool ...

Embodiment 2

[0014] The relevant parameters of the salivating machine in this example are the same as in Example 1. Before starting the machine, adjust the opening of the mouth of the mouth of the salivating die on both sides to 55 μm and set the speed of the steel strip to 5.0 m / min. The width of the adhesive tape on one side is 2.7mm, and the width of the adhesive tape on the other side is 2.6mm. The lip opening on both sides of the drool die is increased from 55 μm to 65 μm. Increase from 35.0m / s±2.0m / s to 37.0m / s±1.5m / s; after the steel belt runs for a week, it is found that the width of the adhesive tape on one side of the steel belt is reduced to 0.3mm, and there is no adhesive tape on the other side. The lip opening on the side still with adhesive tape is increased to 75 μm, and then the wind speed at the outlet of the static pressure box nozzle in the drool drying channel is increased to 43.0m / s±1.5m / s; again, there is no adhesive tape on both sides; Keep the speed of the steel str...

Embodiment 3

[0016] The relevant parameters of the salivating machine in this example are the same as in Example 1. Before starting the machine, adjust the opening of the mouth of the mouth of the salivating die on both sides to 65 μm and set the speed of the steel strip to 5.0 m / min. The width of the adhesive tape on one side is 8.2mm, and the width of the adhesive tape on the other side is 7.6mm. The lip opening on both sides of the drool die is reduced from 65μm to 55μm. At the same time, the temperature of the drool drying tunnel is changed from 200℃±2.0℃ Reduced to 197°C±2°C; after running the steel strip for a week, it was found that the width of the adhesive tape on one side of the steel strip was reduced to 5.6mm, and the width of the adhesive tape on the other side was reduced to 5.4mm, and the running speed of the steel strip was reduced from 5.0m / min to 4.2m / min, and at the same time, the wind speed at the nozzle outlet of the static pressure box in the drool drying channel is re...

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Abstract

The invention discloses an adhesive tape processing method in film production of a slobbering machine. The surface of a steel tape, the viscosity of polyamic acid resin solution, temperature in a drying tunnel and air velocity at a nozzle outlet are all adjusted to the best state; the film stripping condition is detected; if the width of the adhesive tape on one side or two sides of the steel tape is greater than 5.0 mm, the current lip opening of the side or two sides of a die head is reduced; if the width of the adhesive tape on one side or two sides of the steel tape is less than or equal to 3.0 mm, the current lip opening of the side or two sides of the die head is increased; and if the width of the adhesive tape on one side or two sides of the steel tape is 3.0-5.0 mm, the current lip opening of the side or two sides of the die head is reduced or increased. The lip opening is adjusted for multiple times, and the amplitude of each adjustment is 5-12 microns, within an adjustment range of the lip opening. In order to keep the solvent content of a semi-finished product of the film unchanged, the temperature of the drying tunnel and / or the air velocity at the nozzle outlet of a static pressure box are adjusted when the lip opening is adjusted. In the speed adjustment of the steel tape, the moving speed of the steel tape also can be adjusted to eliminate the adhesive tape. Themethod can quickly eliminate the adhesive tape so that the slobbering machine operates normally.

Description

(1) Technical field [0001] The invention relates to a film production technology of a salivating machine, in particular to a method for disposing adhesive tape produced by a salivating machine film. (2) Background technology [0002] During the film production process of the salivating machine, the problem of liquid film sticking to the tape often occurs. Although the surface cleanliness of the steel strip is in the best state, the viscosity of the polyamic acid resin solution and the temperature of the drying tunnel are also in the optimal range, and the speed of the steel strip is in the best range. Within the normal range, it is still difficult to avoid the appearance of sticky tape. Especially when the extrusion die is used to directly form the resin solution on the steel belt to form a salivating liquid film, when the semi-finished film is peeled off, there may be sticky bands on the edges of both sides of the steel band. To a certain extent, it affects the continuous ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C41/52
Inventor 董占林任小龙张俊丽
Owner GUILIN ELECTRICAL EQUIP SCI RES INST
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