CN112169556B - Method for producing drying sheet - Google Patents
Method for producing drying sheet Download PDFInfo
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- CN112169556B CN112169556B CN202011063595.7A CN202011063595A CN112169556B CN 112169556 B CN112169556 B CN 112169556B CN 202011063595 A CN202011063595 A CN 202011063595A CN 112169556 B CN112169556 B CN 112169556B
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- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/28—Selection of materials for use as drying agents
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Abstract
The invention provides a manufacturing method of a drying sheet, belonging to the technical field of drying and being characterized by comprising the following steps: step S1, heating and drying the drying layer until the water content is 15% -20%; step S2, adhering the first paper film and the second paper film on both sides of the drying layer through a first adhesive layer and a second adhesive layer respectively to obtain a drying sheet; step S3, cutting the drying sheet into a preset shape; and step S4, reheating and drying the cut dry piece until the water content is less than 10%. The first paper film and the second paper film are air-permeable and can allow water vapor to permeate, the drying layer is used for absorbing moisture, and the first bonding layer and the second bonding layer are used for connecting the first paper film, the drying layer and the second paper film. The present invention also provides a drying sheet manufactured by the drying sheet manufacturing method of any one of the above items, for absorbing moisture, characterized by comprising: the paper film drying device comprises a first paper film, a first bonding layer, a drying layer, a second bonding layer and a second paper film which are sequentially arranged from top to bottom.
Description
Technical Field
The invention belongs to the technical field of drying, and particularly relates to a manufacturing method of a drying sheet.
Background
Moisture management is closely related to the yield of the product. The drying agent is used for avoiding the generation of defective products caused by excessive moisture. Many products in the industry require high relative humidity in the storage environment and require a relatively constant humidity level. At present, the humidity of environment is regulated and controlled mostly by utilizing the moisture absorption and release characteristics of certain materials, and the mode has the advantages of energy conservation, stable control, safety and the like, and is suitable for stable control of the humidity in a relatively closed small environment.
At present, most humidity control materials belong to the category of drying agents, mainly have a drying function, and can continuously absorb redundant water vapor in the environment. The drying tablet is one kind of drying agent, and the product is mostly in a tablet form, and can be applied to various industries, such as food, furniture, clothing and other industrial fields.
In the prior art, most of drying sheets are processed by covering a plastic film on the surface of a drying layer, the drying layer is in a wet state after being produced, and the drying sheet can be used after being dried until the water content is below 10 percent, but when the area of the plastic film is more than 3cm 2 In the process, the plastic film is tilted and falls off due to heating, so that the processing of the drying sheet is generally carried out after one-time drying and film coating and cutting. But when the dry piece is dried to the moisture content is less than 10%, cut and lead to the dry layer to produce a lot of dust to pollute the dry piece and lead to product quality to descend, and also can influence the processing personnel.
Disclosure of Invention
In order to solve the problems, the invention provides a manufacturing method of a drying sheet, which adopts the following technical scheme:
the invention provides a method for manufacturing a drying sheet, which is characterized by comprising the following steps: step S1, heating and drying the drying layer until the water content is 15-20%; step S2, adhering the first paper film and the second paper film on two sides of the drying layer through a first adhesive layer and a second adhesive layer respectively to obtain a drying sheet; step S3, cutting the dried sheet into a predetermined shape; and step S4, heating and drying the cut dry piece again until the water content is less than 10%.
The method for manufacturing a drying sheet according to the present invention may further include a feature in that the first paper film and the second paper film are air-permeable and permeable to water vapor, the drying layer is configured to absorb water, the first adhesive layer is configured to connect the first paper film and the drying layer, and the second adhesive layer is configured to connect the second paper film and the drying layer.
The method for manufacturing a dry sheet according to the present invention may further include the steps of, between step S1 and step S2: and printing characters or patterns on the opposite side of the first paper film or the second paper film and the drying layer.
The method for manufacturing a drying sheet according to the present invention may further include a step of printing a food-grade ink on the printing ink for printing characters or patterns.
The method for manufacturing the drying sheet according to the present invention may further include a step of forming the first paper film and the second paper film from dupont paper, spunlace, mesh paper, warpont paper, composite paper, or nonwoven fabric.
The method for manufacturing a drying sheet according to the present invention may further include a step of forming a second adhesive layer on the second adhesive layer.
The method for manufacturing a drying sheet according to the present invention may further include a step of forming the first adhesive layer and the second adhesive layer to have an adhesive net structure.
The present invention provides a drying sheet manufactured by any one of the above-described drying sheet manufacturing methods for absorbing moisture, characterized by comprising: the paper film drying device comprises a first paper film, a first bonding layer, a drying layer, a second bonding layer and a second paper film which are sequentially arranged from top to bottom.
Action and Effect of the invention
According to the manufacturing method of the dry sheet provided by the invention, a method for simultaneously processing and coating films on all layer structures and performing secondary drying is used, and specifically, the dry layer is dried to the water content of 15% -20%, then the film is simultaneously processed, the finished dry sheet is obtained by cutting, and then the finished dry sheet is dried until the water content is less than 10%. The secondary drying method of drying the dry layer of the drying sheet to the water content of 15% -20% and then drying the dry layer to the water content of less than 10% can cut the dry layer when the water content is higher, and compared with the primary drying method of drying the dry layer to the water content of less than 10%, the dust amount generated in the processing process is obviously reduced. The secondary drying method for manufacturing the drying sheet not only improves the product quality, but also protects the production environment and the health of manufacturing and processing personnel. In addition, the plastic film is easy to warp after being heated in the processing process, so the material for covering the drying layer in the manufacturing method of the drying sheet in the embodiment is the paper film, and the processing of secondary drying can be carried out.
Drawings
FIG. 1 is a schematic diagram of a dryer sheet according to an embodiment of the present invention;
FIG. 2 is a dust comparison graph of primary and secondary dried sheets of an embodiment of the present invention;
FIG. 3 is a chart comparing the air permeability of various wrappers according to the embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.
< example >
The present embodiment provides a drying sheet for absorbing moisture.
Fig. 1 is a schematic structural view of a drying sheet according to an embodiment of the present invention.
As shown in fig. 1, the drying sheet 100 of the present embodiment has a multilayer structure, and a first paper film 1, a first adhesive layer 2, a drying layer 3, a second adhesive layer 4, and a second paper film 5 are arranged in this order from top to bottom.
The shapes and areas of the surfaces of the first paper film 1, the first adhesive layer 2, the drying layer 3, the second adhesive layer 4, and the second paper film 5 that are connected to each other are equal.
The first paper film 1 and the second paper film 5 have air permeability and can allow water vapor to permeate through, and the first paper film 1 and the second paper film 5 are matched with each other to fix internal materials. In this embodiment, the material of the first paper film 1 and the second paper film 2 is C-type mesh paper.
Labels are printed on the other surfaces of the first paper film 1 and the second paper film 5 opposite to the dry layer 3, and the ink used for printing is food-grade ink. In other embodiments, other patterns and text may be printed.
The drying layer 3 is used to absorb moisture and release moisture to adjust humidity.
The first adhesive layer 2 and the second adhesive layer 4 are used to connect the first paper film 1, the dry layer 3, and the second paper film 5. In this embodiment, the first adhesive layer 2 and the second adhesive layer 4 are degradable adhesive net adhesives and are in a liquid glue state after being heated.
The embodiment also provides a manufacturing method of the drying sheet, which comprises the following steps:
step S1, the drying layer 3 is heated and dried until the water content is 15-20%.
In step S2, a label is printed on one side of the first paper film 1 or the second paper film 5 using food grade ink.
In step S3, the first paper film 1, the first adhesive layer 2, the dry layer 3, the second adhesive layer 4, and the second paper film 5 are sequentially arranged (the label-printed side of the first paper film 1 or the second paper film 5 faces the dry layer 3), and the first paper film 1 and the second paper film 5 are simultaneously processed so as to be adhered to both sides of the dry layer 3 by the first adhesive layer 2 and the second adhesive layer 4, respectively.
In this embodiment, the film was coated by a five-in-one film coating apparatus. The method specifically comprises the following steps: the C-type corrugated paper as the first paper film 1 and the second paper film 5 and the adhesive net as the first adhesive layer 2 and the second adhesive layer 3 are in the form of two-roll films, respectively. A plurality of rectangular drying layers 3 are placed on the surface of a conveyor belt and conveyed to a roller; the roll film of the first paper film 1 and the roll film of the first adhesive layer 2 are arranged above the conveyor belt, and the two roll films simultaneously convey the first paper film 1 and the first adhesive layer 2 to be attached to each other and then conveyed to the roller wheel from the upper part of the conveyor belt; the roll films of the second paper film 5 and the second adhesive layer 2 are disposed below the conveyor belt, the first paper film 1 and the first adhesive layer 2 are simultaneously conveyed from the lower side to the roll, and the dry layer 3 is roll-coated with the first paper film 1 and the second paper film 5 simultaneously through the first adhesive layer 2 and the second adhesive layer 4, so that the C-type corrugated paper is adhered and fixed to both sides of the dry layer 3.
In this embodiment, the drying layers 3 are not connected to each other, the C-type mesh paper and the adhesive net are continuous roll films, and the drying sheets after film coating are folded in a Z-shape.
In step S4, the coated dry sheet is cut into a predetermined shape to obtain a dry sheet 100.
Step S5, the cut dry sheet 100 is heated and dried until the water content is less than 10%.
In this embodiment, the cut dry piece 100 is dried for the second time by the rotary oven, that is, the dry piece 100 is put into the rotary oven to be dried evenly and then taken out.
Experiment one
In this embodiment, the drying sheet 100 is processed in a secondary drying manner to reduce dust generated during cutting. The experiment of this example compares the amount of dust during cutting of the drying sheet manufactured by the secondary drying method and the drying sheet manufactured by the primary drying method.
The specific process of the drying sheet 200 manufactured using the one-time drying method is as follows:
step S1, heating and drying the drying layer 3 until the water content is less than 10%;
step S2, adhering the first paper film 1 and the second paper film 5 to the drying layer 3 through the first adhesive layer 1 and the second adhesive layer 4 to form a drying sheet;
step S3, the obtained dried sheet is cut to obtain the dried sheet 200 manufactured by the primary drying method.
The experimental steps are as follows: and respectively observing the secondary drying method and the processing process of manufacturing the drying sheet by the primary drying method, observing the amount of dust generated in the processing process, respectively carrying out plastic package on a plurality of cut drying sheets 100 (secondary drying) and drying sheets 200 (primary drying) after processing, naturally shaking, standing and observing the phenomenon.
Fig. 2 is a dust comparison diagram of the drying sheets of the primary drying and the secondary drying of the embodiment of the invention.
The experimental results are as follows:
during the cutting process of the drying sheet manufactured by the primary drying method, a large amount of dust visible to the naked eye is generated, and during the cutting process of the drying sheet manufactured by the secondary drying method, compared with the cutting process of the drying sheet manufactured by the primary drying method, the amount of dust is obviously reduced, and the dust is hardly visible to the naked eye. Further, as shown in fig. 2, the bag bottom of the drying sheet 200 (right side of fig. 2) manufactured by the one-time drying method is obviously provided with visible fine dust after being packaged; the bottom of the packaged bag is almost dust free with the twice dried sheet 100 (left side of fig. 2).
The experimental result shows that a large amount of dust can be generated in the processing process of the product dried for the first time, a certain amount of dust can be attached to the obtained product, and the amount of the dust in the process of manufacturing the drying sheet by the secondary drying method is obviously reduced compared with that of the product dried for the first time, so that the obtained drying sheet product can not be influenced by the dust. Meanwhile, most of the drying sheets in the prior art are coated with plastic films, but when the plastic films are larger than 3cm 2 In the meantime, the plastic film is lifted and falls off due to heating, so that the processing of the drying sheet cannot use secondary drying. The embodiment of the invention uses the paper film, and simultaneously processes the film and uses secondary drying, thereby reducing dust, improving product quality and being more environment-friendly.
Experiment two
The wrapping materials used by the drying sheet 100 in this embodiment are the first paper film 1 and the second paper film 5, and the paper films have air permeability, so that water vapor can permeate through the paper films, and the moisture absorption effect of the drying sheet 100 is ensured. Experiment two of this embodiment provides the comparison of plastic film and paper membrane gas permeability, specifically is: and (3) comparing the standard value with the American DuPont paper which is most commonly used in the industry so as to determine the air permeability of other packing materials.
The experimental steps are as follows: for different desiccant packaging materials (DuPont paper, spunlace, N-type mesh paper, C-type mesh paper, HuaPont paper, composite paper, PE film, HuaPont non-woven fabric, OZO-10, OZO-5), a simple air permeability tester was used for comparison.
The experimental results are shown below:
TABLE 1 air permeability data of different packing materials
| Name of packing material | Time recording | Air permeability (min/100cc) |
| Dupont paper | 4’ | 4 |
| Water thorn cloth | 35” | 0.58 |
| N-type mesh paper | 30’ | 30 |
| C-type mesh paper | 3’ | 3 |
| Huabang paper | 1’44” | 1.73 |
| Composite paper | 2’11” | 2.18 |
| PE film | N/A | N/A |
| Huabang non-woven fabric | 1’50” | 1.83 |
| Japanese mesh paper OZO-10 | 13’38” | 13.63 |
| Japanese net-grain paper OZO-5 | 2’08” | 2.13 |
FIG. 3 is a chart comparing the air permeability of various wrappers according to the embodiment of the present invention.
As shown in table 1 and fig. 3, the air permeability of the spunlace fabric and the PE film is much smaller than that of other packing materials, while the air permeability of the N-type mesh paper is much larger than that of other packing materials. The other packing materials have a small difference with the permeability of the DuPont paper.
The experimental result shows that DuPont paper is used as a comparative standard value, and the DuPont paper with small difference can be used as a preferable packing material, so that spunlace, N-type mesh paper, C-type mesh paper, Hua Pont paper, composite paper, Hua Pont non-woven fabric, Nissan mesh paper OZO-10 and Nissan mesh paper OZO-5 can be used as the first paper film and the second paper film of the embodiment of the invention, and can be selected correspondingly according to different requirements of users on moisture absorption rates.
Examples effects and effects
According to the manufacturing method of the dry sheet provided by the embodiment, a method for simultaneously processing the coating film on all layer structures and performing secondary drying is used, specifically, the dry layer is dried to the water content of 15% -20%, then the coating film is simultaneously processed, the finished dry sheet is obtained by cutting, and then the finished dry sheet is dried to the water content of less than 10%. The secondary drying method of drying the dry layer of the drying sheet to the water content of 15% -20% and then drying the dry layer to the water content of less than 10% can cut the dry layer when the water content is still high, and compared with the primary drying method of drying the dry layer to the water content of less than 10% for cutting, the amount of dust generated in the processing process is obviously reduced. The secondary drying method for manufacturing the drying sheet not only improves the product quality, but also protects the production environment and the health of manufacturing and processing personnel. In addition, the plastic film is easy to warp after being heated in the processing process, so the material for covering the drying layer in the manufacturing method of the drying sheet in the embodiment is the paper film, and the processing of secondary drying can be carried out.
Further, the method for manufacturing the drying sheet provided by the embodiment prints characters or patterns on the surface of the first paper film or the second paper film opposite to the drying layer, and can select the printing content according to the requirements of a user, so that the drying sheet of the embodiment is more widely applied and can be used as a label or a drying sheet at the same time.
Furthermore, in the manufacturing method of the drying sheet provided by the embodiment, the used materials are degradable materials, and the used degradable paper film is more environment-friendly than a plastic film; the adhesive is degradable glue net; the printing ink for printing is food-grade ink. This makes the material of the dry piece of this embodiment can degrade completely after using, and is very environmental protection.
Further, the drying sheet provided by the embodiment has the first paper film, the first adhesive layer, the drying layer, the second adhesive layer and the second paper film sequentially arranged from top to bottom, wherein the paper film used as the packing material can be made of spunlace, N-type mesh paper, C-type mesh paper, Huabang paper, composite paper or Huabang non-woven fabric and the like, has good air permeability, can better allow water vapor to permeate through, enables the drying layer to fully absorb moisture, and can be correspondingly selected according to different requirements of a user on moisture absorption rate. Meanwhile, the paper film cannot be tilted in the heating and drying manufacturing process of the drying sheet, and the first bonding layer and the second bonding layer are used for adhering the paper film to the drying layer.
The above-described embodiments are merely illustrative of specific embodiments of the present invention, and the present invention is not limited to the description of the above-described embodiments.
In this embodiment, the material used for the first adhesive layer and the second adhesive layer is a degradable adhesive net, and in other embodiments, the first adhesive layer and the second adhesive layer can also be other degradable adhesives such as corn starch adhesive and starch paste.
In this embodiment, the material of the first paper film and the second paper film is C-type mesh paper. In other embodiments, different materials, such as spunlace, N-type mesh paper, and warbang paper, may be selected according to different requirements of the user on the moisture absorption rate.
Claims (8)
1. A method of making a dryer sheet comprising the steps of:
step S1, heating and drying the drying layer until the water content is 15% -20%;
step S2, adhering the first paper film and the second paper film on two sides of the drying layer through a first adhesive layer and a second adhesive layer respectively to obtain a drying sheet;
step S3, cutting the dried sheet into a predetermined shape;
step S4, the cut dry piece is heated and dried again until the water content is less than 10 percent,
the first paper film and the second paper film are air-permeable and can allow water vapor to permeate through.
2. The method of manufacturing a drying sheet according to claim 1, wherein:
wherein the content of the first and second substances,
the drying layer is used for absorbing moisture,
the first adhesive layer is for joining the first paper film and the drying layer,
the second adhesive layer is used to connect the second paper film and the drying layer.
3. The method of manufacturing a drying sheet according to claim 1, wherein:
wherein, the following steps are further included between the step S1 and the step S2:
and printing characters or patterns on the opposite surfaces of the first paper film or the second paper film and the drying layer.
4. The method of manufacturing a drying sheet according to claim 3, wherein:
wherein the printing ink for printing the characters or the patterns is food-grade printing ink.
5. The method of manufacturing a drying sheet according to claim 1, wherein:
the first paper film and the second paper film are made of DuPont paper, spunlace, net-grain paper, HuaPont paper, composite paper or non-woven fabric.
6. The method of manufacturing a drying sheet according to claim 1, wherein:
wherein the material of the first adhesive layer and the second adhesive layer is degradable paste.
7. The method of manufacturing a drying sheet according to claim 1, wherein:
wherein the first adhesive layer and the second adhesive layer are of an adhesive net structure.
8. A drying sheet manufactured by the drying sheet manufacturing method of any one of claims 1 to 7, for absorbing moisture, comprising:
the first paper film, the first adhesive layer, the drying layer, the second adhesive layer and the second paper film are sequentially arranged from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011063595.7A CN112169556B (en) | 2020-09-30 | 2020-09-30 | Method for producing drying sheet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011063595.7A CN112169556B (en) | 2020-09-30 | 2020-09-30 | Method for producing drying sheet |
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| CN112169556B true CN112169556B (en) | 2022-09-27 |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090038174A1 (en) * | 2007-08-07 | 2009-02-12 | Dar-Style Consultants & More Ltd. | Kitchen utensil dryer |
| CN201534049U (en) * | 2009-04-27 | 2010-07-28 | 上海富森实业有限公司 | Drying piece |
| JP2012167396A (en) * | 2011-02-14 | 2012-09-06 | Tanaka Seishi Kogyo Kk | Drying sheet |
| CN205087284U (en) * | 2015-10-14 | 2016-03-16 | 晋江拓普旺防霉材料有限公司 | Dry package of mould proof |
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