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Film preparation method of low-viscosity thermocuring glue

A heat-curing, low-viscosity technology, applied in the direction of films/sheets, adhesives, adhesive types, etc. Adjustable thickness and uniform film thickness

Pending Publication Date: 2021-12-31
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The goal of laboratory coating is fast and experimental, which is much more affected by process, equipment, and raw materials than industrial coating equipment. Therefore, the prepared film cannot reach industrial quality in terms of appearance and test performance. It is even impossible to achieve a more accurate measurement of its performance, so as to obtain data with large errors, which affects the results and progress of the experiment
In particular, for glues with low solid content and low viscosity, the thickness and performance of the film prepared in the traditional way cannot reflect its true value, which will easily lead to excessive errors in experimental data and waste of experiments.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Design and prepare glue, which is self-prepared and synthesized heat-curing TPU glue, 20% solid content, 800CP@25℃.

[0034] 2. The chassis is circulated with cold water (10°C), a glass plate is placed on the chassis, and the scraper is cooled to 10°C.

[0035] 3. Cover the glass plate with a release film with a release force of 0.5N / 25mm, pour the glue on the release film, and cool for 2 minutes; adjust the scraper to 800μm, and then apply it with a scraper.

[0036] 4. Put the glass plate together with the film into the oven to bake, the temperature setting range is: room temperature ~ 75°C ~ 95°C ~ 175°C, the heating rate is: 3°C / min ~ 5°C / min ~ 8°C / min, The holding time is: 0min~7min~7min~8min.

[0037] 5. After the baking is completed, place the film in a 10°C environment to cool for 20 minutes.

[0038] 6. Sample cutting and testing, the results are shown in Table 1.

Embodiment 2

[0040] 1. Use 20% solid content, 500CP@25℃ heat-curable TPU glue.

[0041] 2. The chassis is circulated with cold water (8°C), a glass plate is placed on the chassis, and the scraper is cooled to 8°C.

[0042] 3. Cover the glass plate with a release film with a release force of 0.3N / 25mm, pour the glue on the release film, and cool for 2 minutes; adjust the scraper to 800 μm, and then apply it with a scraper.

[0043] 4. Put the glass plate together with the film into the oven to bake, the temperature setting range is: room temperature ~ 65°C ~ 85°C ~ 165°C, the heating rate is: 2°C / min ~ 4°C / min ~ 6°C / min, The holding time is: 0min~5min~5min~5min.

[0044] 5. After the baking is completed, place the film in a 10°C environment to cool for 20 minutes.

[0045] 6. Sample cutting and testing, the results are shown in Table 1.

Embodiment 3

[0047] 1. Use 20% solid heat-curable TPU glue with a viscosity of 400CP@25°C.

[0048] 2. The chassis is circulated with cold water at a temperature of 5°C, a glass plate is placed on the chassis, and the scraper is cooled to 5°C.

[0049] 3. Place a release film with a release force of 0.4N / 25mm on the glass plate, pour the glue on the release film, cool for 2 minutes, adjust the scraper to 800μm, and then apply it with a scraper.

[0050] 4. Put the glass plate together with the film into the oven to bake, the temperature setting range is: 10°C ~ 70°C ~ 80°C ~ 170°C, the heating rate is: 3°C / min ~ 5°C / min ~ 8°C / min , The holding time is: 0min~5min~6min~6min.

[0051] 5. After the baking is completed, the film is cooled at room temperature.

[0052] 6. Sample cutting and testing, the results are shown in Table 1.

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PUM

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Abstract

The invention discloses a film preparation method of low-viscosity thermocuring glue, and belongs to the field of functional film preparation. The low-viscosity thermocuring glue is adopted, coating is conducted under the low-temperature condition, baking and film forming are conducted under the gradient heating condition, then rapid cooling is conducted at the low temperature, and the thin film is obtained. The film preparation method is low in cost and simple to operate, the film forming stability of the low-viscosity glue is improved, and the prepared film has excellent mechanical properties.

Description

technical field [0001] The invention relates to the field of functional film preparation, in particular to a film-making method of low-viscosity thermosetting glue. Background technique [0002] At present, manual or semi-automatic coating is mostly used in laboratory coating, and the main equipment is wire bar coater, scraper, etc. The goal of laboratory coating is fast and experimental, which is much more affected by process, equipment, and raw materials than industrial coating equipment. Therefore, the prepared film cannot reach industrial quality in terms of appearance and test performance. Even more accurate measurement of its performance cannot be realized, so that data with large errors can be obtained, which will affect the results and progress of the experiment. In particular, for glues with low solid content and low viscosity, the thickness and performance of films prepared in traditional ways cannot reflect their true values, which may easily lead to excessive er...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/10C09J175/04
CPCC09J7/10C09J175/04
Inventor 王亮裘旭挺曹慧杰李冠毅周玉波金亚东
Owner NINGBO CHANGYANG TECH