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Curing method for reducing peculiar smell of food packaging bag

A technology for packaging bags and food, which is applied in the field of curing, and can solve the problems that the heating adhesive does not stick to the composite film, the curing tank has a strong odor, and the curing effect is poor.

Inactive Publication Date: 2022-06-24
武汉环泰包装印务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Before the base film of the food packaging bag is ripened, due to air flow and bubbling or during the processing of the food packaging bag, it is very easy to cause the composite film of the food packaging bag to have poor flatness and wrinkle voids or convex round voids, which make The cured heating adhesive cannot stick to the composite film, so the curing effect is poor. Secondly, the residual solvent with a low boiling point is removed without pre-heating, resulting in a strong odor in the curing tank during the curing process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A curing method for reducing the peculiar smell of a food packaging bag, comprising the following method steps;

[0017] S1. Use a tetrafluoroethylene polymer as a binder, and secondly select a nylon film to form the base film of the food packaging bag by evenly brushing the tetrafluoroethylene polymer between the food packaging bag and the nylon film.

[0018] S2. Roll the base film of the food packaging bag through the roller to extrude and level it, and then let it stand for 4-5 minutes. After confirming that there is no gap, put it into the curing tank, otherwise continue to extrude and level it through the roller until The volume of a single void is less than 3 cubic millimeters, and the number of voids is less than 5.

[0019] S3. Adjust the preheating temperature in the curing tank to 45-65 degrees Celsius and heat for 30-35 minutes, open the vent, remove the residual solvent with low boiling point, and distribute the generated gas to the outside of the curing ta...

Embodiment 2

[0026] A curing method for reducing the peculiar smell of a food packaging bag, comprising the following method steps;

[0027] S1. Use a tetrafluoroethylene polymer as a binder, and secondly select a PET film. The base film of the food packaging bag is formed by evenly brushing the tetrafluoroethylene polymer between the food packaging bag and the PET film.

[0028] S2. Roll the base film of the food packaging bag through the roller to extrude and level it, and then let it stand for 3-4 minutes. After confirming that there is no gap, put it into the curing tank, otherwise continue to extrude and level it through the roller until The volume of a single void is less than 3 cubic millimeters, and the number of voids is less than 5.

[0029] S3. Adjust the preheating temperature in the curing tank to 40-50 degrees Celsius and heat for 20-25 minutes, open the vent hole, remove the residual solvent with low boiling point, and emit the generated gas to the outside of the curing tank...

Embodiment 3

[0036] A curing method for reducing the peculiar smell of a food packaging bag, comprising the following method steps;

[0037] S1. Use polyurethane as the adhesive, and then select the CPP film, and form the base film of the food packaging bag by evenly brushing the tetrafluoroethylene polymer between the food packaging bag and the CPP film.

[0038] S2. Roll the base film of the food packaging bag through the roller to extrude and level it, and then let it stand for 3-5 minutes. After confirming that there is no gap, put it into the curing tank, otherwise continue to extrude and level it through the roller until The volume of a single void is less than 3 cubic millimeters, and the number of voids is less than 5.

[0039] S3. Adjust the preheating temperature in the curing tank to 45-55 degrees Celsius and heat for 10-15 minutes, open the vent hole, remove the residual solvent with low boiling point, and emit the generated gas to the outside of the curing tank until there is ...

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PUM

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Abstract

The invention discloses a curing method for reducing peculiar smell of a food packaging bag, which comprises the following steps: using tetrafluoroethylene polymer as an adhesive, then selecting a nylon film, and uniformly brushing the tetrafluoroethylene polymer between the food packaging bag and the nylon film to form a base film of the food packaging bag; the curing method for reducing the peculiar smell of the food packaging bag has the beneficial effects that the problem that the curing effect is affected due to the fact that an adhesive cannot adhere to a composite film due to wrinkled gaps or convex circular gaps generated by air flow and bubbling before curing in the prior art is solved.

Description

technical field [0001] The invention relates to the field of curing methods, in particular to a curing method for reducing the peculiar smell of food packaging bags. Background technique [0002] Curing refers to the semi-finished product after compounding of food packaging bags. After a certain temperature and time, it is fully cross-linked under specific conditions to achieve the optimal compounding temperature. Curing is also called curing. The main purpose of curing is to bond the main agent and cure. The agent fully reacts within a certain time to make the cured film firm, remove the residual solvent with low boiling point, and reduce odor. [0003] Before the base film of the food packaging bag is cured, due to air flow and bubbling or during the processing of the food packaging bag, it is very easy to cause the poor flatness of the composite film of the food packaging bag to have wrinkle or convex gaps, so that the The cured heating adhesive cannot stick to the compo...

Claims

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Application Information

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IPC IPC(8): B29C71/00B29C37/00
CPCB29C71/00B29C37/00B29C2071/0027
Inventor 谢涛冯长发徐胜国
Owner 武汉环泰包装印务有限公司