WO2021243883A1 - 一种除湿袋及其制备方法 - Google Patents

一种除湿袋及其制备方法 Download PDF

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Publication number
WO2021243883A1
WO2021243883A1 PCT/CN2020/115569 CN2020115569W WO2021243883A1 WO 2021243883 A1 WO2021243883 A1 WO 2021243883A1 CN 2020115569 W CN2020115569 W CN 2020115569W WO 2021243883 A1 WO2021243883 A1 WO 2021243883A1
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WO
WIPO (PCT)
Prior art keywords
layer
moisture
heat
film
sealing
Prior art date
Application number
PCT/CN2020/115569
Other languages
English (en)
French (fr)
Inventor
孙国锦
陈灿
曾文明
谢志岗
任苗
Original Assignee
浙江金石包装有限公司
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Filing date
Publication date
Application filed by 浙江金石包装有限公司 filed Critical 浙江金石包装有限公司
Priority to US17/057,312 priority Critical patent/US20230081227A1/en
Publication of WO2021243883A1 publication Critical patent/WO2021243883A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/01—Ventilation or drainage of bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B61/00—Wardrobes
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
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Definitions

  • This application relates to the technical field of dehumidification packaging, and in particular to a dehumidification bag and a preparation method thereof.
  • the most widely used dehumidification packaging on the market is a composite packaging bag with a hook, which is generally composed of an outer bag, an inner bag body, a hook and a fixed clip.
  • the fixed clip is used to clamp the bag desiccant inlet
  • the inner bag is made of the upper desiccant bag (usually non-woven fabric Material) and the lower layer of moisture-absorbing water bag are combined into one body by sealing
  • the bottom of the upper layer of desiccant bag is provided with a number of penetration holes
  • the ventilating through holes are arranged on both sides of the surface of the bag body, and the bag body is hung in the wardrobe.
  • the above-mentioned dehumidification bag has a certain dehumidification effect
  • the upper desiccant bag made of non-woven fabric has only one outer bag during storage.
  • the protective layer, and the non-woven fabric is breathable.
  • the desiccant can absorb the moisture in the air in the outer bag through the breathable non-woven fabric, causing the effect of the dehumidifier to deteriorate or become invalid.
  • the technical problem to be solved by this application is to overcome the defect that the dehumidifier bag containing the dehumidifier in the prior art absorbs moisture in the air in the outer bag during storage and transportation, which will cause the effect of the dehumidifier to deteriorate or fail.
  • a dehumidification bag and a preparation method thereof are provided.
  • a dehumidification bag including:
  • the bag body includes a first side panel and a second side panel, the side panel includes a breathable film and/or a composite film, wherein all or part of at least one side sheet is a breathable film;
  • the accommodating cavity is formed by heat sealing the first side piece and the second side piece;
  • the moisture-proof layer covers the outside of the breathable film.
  • the moisture barrier is tearable.
  • the bag body further includes a bottom sheet, which is heat-sealed together with the first side sheet and the second side sheet to form an accommodating cavity.
  • a dehumidification bag includes a backsheet, it can be self-standing, and is also called a dehumidification stand-up bag.
  • the openable and closable sealing structure may be a zipper or a sealing strip.
  • the moisture-proof layer includes a reinforcement layer and a barrier layer
  • the barrier layer is a polyethylene terephthalate film layer
  • the reinforcement layer is an aluminum foil layer, a polyester aluminized film layer or a thin film layer formed of aluminum foil and polyethylene terephthalate;
  • the breathable membrane is non-woven fabric or Tyvek.
  • a pattern layer can be provided on one or both sides of the barrier layer; some text or pattern descriptions related to the product can be displayed on the pattern layer, which is convenient for consumers to understand.
  • the thickness of the barrier layer is 12-50 ⁇ m.
  • the composite film may be a conventional composite film, such as a polyethylene film and the like. Further preferably, the composite film includes a heat-sealing layer, an adhesive layer, an ink layer and a printing layer in order from the inside to the outside;
  • the heat-sealing layer is a polyethylene layer or a cast polypropylene layer
  • the printing layer is a polyethylene terephthalate film layer and/or a polyamide layer.
  • the thickness of the adhesive layer is 1-3 ⁇ m
  • the thickness of the ink layer is less than 3 ⁇ m
  • the thickness of the heat sealing layer is 30-150 ⁇ m
  • the thickness of the printing layer is 12-50 ⁇ m.
  • an easy-pull structure is provided on the moisture-proof layer.
  • the easy-pull structure extends out of the heat-sealed end, and can be square, rectangular, arc-shaped, elliptical, or the like.
  • This application also provides a method for preparing a dehumidification bag, which includes the following steps:
  • the side sheet is composed of a breathable film and/or a composite film, and all or part of at least one side sheet is a breathable film;
  • the moisture-proof layer is located on the outer side of the breathable film.
  • the two breathable films are placed between the two moisture-proof layers, and then heat-sealed to obtain the dehumidification bag.
  • the dehumidification bag is formed between the two breathable films. A containing cavity for dehumidifying agent.
  • the breathable film overlaps the composite film to form a composite side sheet (that is, a side sheet composed of a breathable film and a composite film), and the breathable film of the overlapped part is located on the inner side of the composite film; Then heat-sealed it with the other side sheet and the moisture-proof layer to obtain the dehumidification bag.
  • the moisture-proof layer is located on the side of the breathable film away from the other side sheet.
  • the side sheets of the composite film form a containing cavity for containing the desiccant.
  • the breathable film overlaps with the composite film to form a composite side sheet (that is, a side sheet composed of a breathable film and a composite film), and the breathable film of the overlapping part is located on the inner side of the composite film ; Then the two composite side sheets and the moisture-proof layer are heat sealed, and the moisture-proof layer is located on the side of the breathable film away from the other composite side sheet; that is, the dehumidification bag is formed between the two composite side sheets In the containing cavity containing the dehumidifier.
  • the transverse heat-sealing is performed first, and then the longitudinal heat-sealing is performed to form two side heat-sealed edges.
  • the backsheet can be any shape that can support the bag body to stand up on its own, such as an oval shape, a circular shape, and the like.
  • the heat sealing temperature is 130-220°C, and the time is 0.5-1s.
  • the step of coating a heat-sealing glue on the moisture-proof layer is further included; wherein the speed of the heat-sealing glue coating is less than or equal to 200m/min;
  • the drying temperature of the first drying tunnel is 70-90°C
  • the drying temperature of the second drying tunnel is 80-120°C
  • the drying temperature of the third drying tunnel is 90-150°C
  • the coating amount of the heat sealant after drying is 3-6g/m 2 .
  • the moisture-proof layer is a reinforcement layer and a barrier layer in order from the inside to the outside;
  • the composite film is a heat seal layer, an adhesive layer, an ink layer and a printing layer in order from the inside to the outside;
  • the preparation step of the moisture-proof layer is: compounding and curing the barrier layer after printing the ink pattern with the reinforcing layer to obtain the moisture-proof layer;
  • the preparation method of the composite layer is that the printing layer, the adhesive layer and the heat-sealing layer are composited and cured to obtain a composite layer.
  • the speed of said compounding is less than or equal to 200m/min;
  • the temperature of one-stage drying is 50-60°C
  • the temperature of second-stage drying is 65-85°C
  • the temperature of three-stage drying is 75-90°C
  • the bonding temperature is 50-70°C; after compounding is completed , Curing at 40-50°C, curing time ⁇ 48h.
  • the dehumidification bag provided by the present application includes: a bag body, including a first side sheet and a second side sheet, the side sheet includes a breathable film and/or a composite film, wherein all or part of at least one side sheet is breathable Membrane; moisture-proof layer, covering the outside of the breathable film.
  • the dehumidification bag provided by the present application is provided with a breathable film on the bag body, and the outer surface of the layer is covered with a moisture-proof layer and heat-sealed, so that the breathable film and the moisture-proof layer are in close contact without moisture absorption, which effectively prevents transportation and
  • the air-permeable membrane is in contact with the air in the outer bag and the effect of the dehumidifier becomes poor or invalid; and the moisture-proof layer is tearable.
  • the moisture-proof layer is tearable.
  • the humidity is heavier than air, the humidity will move downwards, so the bottom of the wardrobe or cabinet is the gathering point of moisture.
  • the existing dehumidification bag is hung on the clothes rail in the closet by hooks, which is the top of the closet. , Resulting in poor dehumidification effect; the dehumidification bag provided in this application can be placed at the bottom of a wardrobe or cabinet without a hook, and the dehumidification effect is good.
  • the dehumidification bag provided by this application can be self-supporting by providing a backsheet.
  • the bottom sheet can be a horizontal support structure of any shape at the bottom of the existing self-supporting bag, so that the bag can stand on its own without relying on any support.
  • the dehumidification bag provided in this application is provided with an openable and closable sealing structure. After the dehumidifier in the dehumidification bag expires, the purchaser can open it and replace it with a new dehumidifier, and then close the self-sealing structure and continue to use it. The effect of reuse, saving cost and energy.
  • the dehumidification bag provided by this application restricts the breathable membrane to be non-woven fabric or Tyvek; both non-woven fabric and Tyvek have good air permeability, but they do not leak water and can let water in the air The vapor passes through, and the dehumidifier in the bag is absorbed to achieve the purpose of dehumidification.
  • the moisture-proof layer includes a barrier layer and a reinforcing layer
  • the barrier layer is a polyethylene terephthalate film layer
  • the reinforcement layer is an aluminum foil layer, a polyester aluminized film layer, or a film layer formed of aluminum foil and polyethylene terephthalate
  • the heat-sealing strength of the moisture-proof layer and the air-permeable and water-impermeable layer can be maintained at 5-20N/15mm; the moisture-proof layer not only has good contact with the air-permeable membrane, but also is easy to tear off and convenient to use.
  • the dehumidification bag provided by the present application can improve the moisture-proof effect during transportation or storage, that is, improve the sealing effect of the moisture-proof layer and the air-permeable layer.
  • the dehumidification bag provided by the present application can further improve the sealing effect of the moisture-proof layer and the air-permeable layer by limiting the layer structure of the composite film and the thickness of each layer.
  • a structure that is easy to tear the moisture-proof layer is arranged on the heat-sealed portion of the moisture-proof layer, which is more convenient for the purchaser to tear the moisture-proof layer.
  • the preparation method of the dehumidification bag includes the following steps: heat-sealing the moisture-proof layer with the first side sheet and the second side sheet to obtain the dehumidification bag, wherein the side sheet is made of a breathable film and/or
  • the composite film is composed of, at least one side sheet is a breathable film in whole or in part; the moisture-proof layer is located on the outside of the breathable film.
  • the breathable membrane in the dehumidification bag made is in close contact with the moisture-proof layer, and does not absorb moisture, which effectively prevents the breathable membrane from contacting the outside air during transportation and storage to cause dehumidification
  • the effect of the agent becomes poor or invalid; and the moisture-proof layer can be torn off.
  • the moisture-proof layer can be used only by tearing it off, which is convenient and fast.
  • the humidity is heavier than air, the humidity will move downwards, so the bottom of the wardrobe or cabinet is the gathering point of moisture.
  • the existing dehumidification bag is hung on the clothes rail in the closet by hooks, which is the top of the closet.
  • the dehumidification bag provided in the present application can be placed at the bottom of a wardrobe or cabinet without hooks, and has a good dehumidification effect; and the preparation method of the dehumidification bag provided in the present application is simple and convenient, and can be heat-sealed, saving materials.
  • the method for preparing the dehumidification bag provided in the present application can realize self-standing by heat-sealing the moisture-proof layer, the bottom sheet, the first side sheet and the second side sheet to form a bag body with a containing cavity.
  • the preparation method of the dehumidification bag limits the temperature and time of heat sealing to prevent wrinkles, small bubbles or delamination in the heat-sealed place after heat sealing, which can improve the dehumidification of the prepared
  • the sealing effect of the moisture-proof layer and the breathable film in the bag while balancing the tear-off effect of the moisture-proof layer, makes the breathable film and the moisture-proof layer in close contact, and does not absorb moisture, which effectively prevents the breathable film from contacting the outside world during transportation and storage. Air contact causes the effect of the dehumidifier to deteriorate or become invalid; when the buyer uses it, it can be used simply by tearing off the moisture-proof layer, which is convenient and fast.
  • the dehumidification bag prepared by the above method can be placed at the bottom of a wardrobe or cabinet without a hook, and the dehumidification effect is good.
  • the preparation method of the dehumidification bag provided in this application limits the coating speed and temperature of the heat sealant and the coating amount of the heat sealant after drying, which can improve the uniformity of coating and further optimize the moisture-proof layer and The air-tightness and tearability of the breathable film.
  • the preparation method of the dehumidifying bag provided in this application limits the printing speed and drying temperature, so that the printing of graphics and text is accurate, the printing ink is uniform, and the color has no obvious color difference.
  • the preparation method of the dehumidification bag provided in this application can improve the firmness and strength of the composite and prevent the solvent residue from exceeding the standard and Peculiar smell, environmental protection and health.
  • Figure 1 is a front view of the dehumidification bag in Example 1 of the present application.
  • FIG. 2 is a schematic diagram of the structure of the second side panel in Embodiment 1 of the present application.
  • Figure 3 is a rear view of the dehumidifying bag in Example 1 of the present application.
  • Figure 4 is a cross-sectional view of the A-A plane in Figure 1;
  • Figure 5 is a bottom view of the dehumidification bag in Example 1 of the present application.
  • Example 6 is a schematic diagram of the three-dimensional structure of the dehumidification bag in Example 1 of the present application.
  • Example 7 is a schematic diagram of the structure of the moisture-proof layer in Example 1 of the present application.
  • Example 8 is a schematic diagram of the structure of the second composite membrane in Example 1 of the present application.
  • Figure 9 is a front view of the dehumidification bag in Example 3 of the present application.
  • a dehumidification bag as shown in Figure 1-8, includes:
  • the bag body includes a first side sheet 7, a second side sheet 10 and a bottom sheet 9, the first side sheet 7 is composed of a first composite film, and the second side sheet 10 includes a breathable film 8 and a second side sheet.
  • the second composite film 11; the backsheet 9 is composed of a third composite film; and the first composite film, the second composite film 11 and the third composite film have the same structure and composition;
  • the containing cavity is formed by heat sealing the first side sheet 7, the second side sheet 10 and the bottom sheet 9;
  • the moisture-proof layer 12 covers the side of the breathable membrane 8 away from the containing cavity.
  • the breathable film and the moisture-proof layer are in close contact with each other without moisture absorption, which effectively prevents the breathable film and the moisture-proof layer during transportation and storage.
  • the effect of the dehumidifier becomes poor or ineffective due to contact with the outside air; and the moisture-proof layer can be torn off.
  • the moisture-proof layer can be used only by tearing off it, which is convenient and fast.
  • the dehumidification bag is hung on the clothes rail in the closet by hooks, which is the top of the closet. , Resulting in poor dehumidification effect; the dehumidification bag provided in this application can be placed at the bottom of a wardrobe or cabinet without a hook, and the dehumidification effect is good.
  • the moisture-proof layer 12 includes a barrier layer 1 (a polyethylene terephthalate film layer is used in this embodiment) and a reinforcing layer 2 (an aluminum foil layer is used in this embodiment);
  • the air-permeable membrane 8 is a non-woven fabric that is air-permeable and water-impermeable. Even if the dehumidification bag is inverted, since the air-permeable membrane is water-impermeable, the water in the bag will not flow out;
  • the first composite film, the second composite film 11, and the third composite film are all composed of the following composite layers: from the inside to the outside, the heat-sealing layer 3 (polyethylene layer is used in this embodiment) , Adhesive layer 4, ink layer 5, and printing layer 6 (polyethylene terephthalate film layer is used in this embodiment);
  • the moisture-proof layer not only has good contact with the breathable film, but also is easy to tear off and convenient to use.
  • the thickness of the barrier layer 1 is 12-50 ⁇ m (30 ⁇ m is used in this embodiment); by limiting the thickness of the barrier layer, the sealing effect of the moisture barrier layer and the breathable film can be improved.
  • the thickness of the adhesive layer 4 is 1-3 ⁇ m (3 ⁇ m is used in this embodiment);
  • the thickness of the ink layer 5 is less than 3 ⁇ m (2 ⁇ m is used in this embodiment);
  • the thickness of the heat-sealing layer 3 is 30-150 ⁇ m (55 ⁇ m is used in this embodiment);
  • the thickness of the printing layer 6 is 12-50 ⁇ m (30 ⁇ m is used in this embodiment).
  • the number of times of recycling the dehumidification bag can be increased, and energy can be saved.
  • the breathable film 8 and the second composite film 11 are heat-sealed together by overlapping;
  • the reinforcement layer 2 may also be a polyester aluminum-plated film layer, or a thin film layer formed of aluminum foil and polyethylene terephthalate.
  • the breathable membrane 8 may be Tyvek.
  • the heat-sealing layer 3 may be a cast polypropylene layer.
  • the printing layer 6 may be a polyamide layer or a polyethylene terephthalate film layer and a polyamide layer.
  • the preparation method of the above-mentioned dehumidification bag includes the following steps:
  • a gravure printing machine is used to print the text pattern (that is, the ink layer 5) on the inner side of the printing layer 6, the printing speed is 100m/min, and the drying temperature is 80°C;
  • the polyurethane adhesive that is, the adhesive layer 4
  • the speed of coating the polyurethane adhesive is 160m/min
  • the side of the printing layer 6 coated with polyurethane adhesive is compounded with the heat-sealing layer 3 at a compounding speed of 160m/min; during compounding, the temperature of the first drying tunnel is 50°C, and the temperature of the second drying tunnel is 65°C. The temperature of the three-stage drying tunnel is 75°C, and the bonding temperature is 50°C;
  • the compound film is obtained by curing at 45°C in the curing room for 48 hours.
  • a gravure printing machine is used to print text patterns on the inner side of the barrier layer 1, the printing speed is 100m/min, and the drying temperature is 80°C;
  • the side of the barrier layer 1 printed with the text pattern is compounded with the reinforcing layer 2 at a compounding speed of 160m/min; during compounding, the temperature of the first drying tunnel is 50°C, the temperature of the second drying tunnel is 65°C, and the three drying tunnels The temperature is 75°C, and the bonding temperature is 50°C;
  • the coating speed of the heat-sealing glue is 160m/min; when the heat-sealing glue is coated, the drying temperature of the first drying tunnel is 70°C, and the second drying The drying temperature of the tunnel is 80°C, and the drying temperature of the three-stage drying tunnel is 90°C; the coating amount of the heat sealant after drying is 3g/m 2 .
  • the composite film 11 Separate the composite film 11, the coated moisture-proof layer 12 and the breathable film 8 according to the specifications to obtain the required width roll materials: the first side sheet 7, the second composite film 11, the moisture-proof layer 12, the breathable film 8 and the back sheet 9 .
  • the split breathable film 8 and the second composite film 11 are partially overlapped to form the second side sheet 10, and the overlapping portion of the breathable film 8 is located on the inner side of the second composite film 11; then the moisture-proof layer 12 is coated with heat One side of the sealant is covered with a breathable film 8; and the moisture-proof layer 12 at the overlapping part of the breathable film 8 and the second composite film 11 is located on the outside of the second composite film 11, and then the moisture-proof layer 12, the breathable film 8 and the second
  • the lap joints of the composite film 11 are heat-sealed transversely, the heat-sealing temperature is 180°C, and the time is 0.5s;
  • the bottom sheet 9 is heat-sealed transversely with the first side sheet 7 and the second composite film 11 respectively; the heat-sealing temperature is 150°C, and the time is 0.8s;
  • the second side sheet 10 and the first side sheet 7, the moisture-proof layer 12 and the back sheet 9 are longitudinally heat-sealed on two sides to form two side heat-sealed sides to obtain a bag with a containing cavity.
  • the temperature of the heat-sealing is The temperature is 220° C., and the time is 0.5 s; and when longitudinally heat-sealing, the moisture-proof layer 12 is located on the side of the breathable film 8 away from the first side sheet 7.
  • the bottom sheet 9 is fixed between the first side sheet 7 and the second side sheet 10 to form the bottom of the dehumidification bag; a receiving cavity for containing the dehumidifier is formed between the first side sheet 7, the second side sheet 10 and the back sheet 9 ;
  • the dehumidification bag is obtained by cutting.
  • the ends of the first side sheet 7 and the second side sheet 10 away from the bottom sheet 9 can be heat sealed.
  • the heat-sealing strength of the moisture-proof layer and the breathable film of the prepared dehumidification bag was tested, and the heat-sealing strength was 18N/15mm.
  • a dehumidification bag as shown in Figure 7, includes:
  • the bag body includes a first side sheet 7, a second side sheet 10 and a bottom sheet 9.
  • the first side sheet 7 is composed of a first composite film;
  • the bottom sheet 9 is composed of a third composite film.
  • the second side sheet 10 is a breathable film 8; and the structure and composition of the first composite film and the third composite film are the same;
  • the containing cavity is formed by heat sealing the first side sheet 7, the second side sheet 10 and the bottom sheet 9;
  • the moisture-proof layer 12 covers the side of the air-permeable membrane 8 away from the containing cavity, and the moisture-proof layer 12 is provided with a structure that is easy to tear off the moisture-proof layer at the place where the moisture-proof layer 12 extends out of the heat seal.
  • the structure can be square, rectangular, or arc-shaped. , Ellipse, etc. (in this embodiment, a circular arc is used).
  • the breathable film and the moisture-proof layer are in close contact without moisture absorption, which effectively prevents air permeability during transportation and storage.
  • the membrane When the membrane is in contact with the outside air, the effect of the dehumidifier becomes poor or ineffective; by setting the moisture-proof layer to be tearable, when the buyer uses it, the moisture-proof layer can be used simply by tearing it off, which is convenient and fast.
  • the humidity since the humidity is heavier than air, the humidity will move downwards, so the bottom of the wardrobe or cabinet is the gathering point of moisture.
  • the existing dehumidification bag is hung on the clothes rail in the closet by hooks, which is the top of the closet. , Resulting in poor dehumidification effect; the dehumidification bag provided in this application can be placed at the bottom of a wardrobe or cabinet without a hook, and the dehumidification effect is good.
  • the moisture-proof layer 12 includes a barrier layer 1 (a polyethylene terephthalate film layer is used in this embodiment) and a reinforcing layer 2 (a polyester aluminized film layer is used in this embodiment);
  • the breathable membrane 8 is made of Tyvek that is breathable and impermeable. Even if the dehumidification bag is inverted, since the breathable membrane is impermeable, the water in the bag will not flow out;
  • the first composite film and the third composite film are composed of the following composite layers: from the inside to the outside, the heat-sealing layer 3 (polyethylene layer is used in this embodiment), the adhesive layer 4, the ink layer 5, and the printing layer 6 (This embodiment uses a polyethylene terephthalate film layer);
  • the moisture-proof layer is not only in close contact with the breathable membrane, but also easy to tear off and convenient to use.
  • the thickness of the barrier layer 1 is 12-50 ⁇ m (50 ⁇ m is used in this embodiment); by limiting the thickness of the barrier layer, the sealing effect of the moisture barrier layer and the breathable film can be improved.
  • the thickness of the adhesive layer is 1-3 ⁇ m (2 ⁇ m is used in this embodiment);
  • the thickness of the ink layer is less than 3 ⁇ m (3 ⁇ m is used in this embodiment);
  • the thickness of the heat-sealing layer 3 is 30-150 ⁇ m (150 ⁇ m is used in this embodiment);
  • the thickness of the printing layer 6 is 12-50 ⁇ m (12 ⁇ m is used in this embodiment).
  • the number of times of recycling the dehumidification bag can be increased, and energy can be saved.
  • the reinforcing layer 2 may also be an aluminum foil layer, or a film layer formed of aluminum foil and polyethylene terephthalate.
  • the breathable membrane 8 may be a non-woven fabric.
  • the heat-sealing layer 3 may be a cast polypropylene layer.
  • the printing layer 6 may be a polyamide layer or a polyethylene terephthalate film layer and a polyamide layer.
  • the preparation method of the above-mentioned dehumidification bag includes the following steps:
  • a gravure printing machine is used to print the text pattern (that is, the ink layer 5) on the inner side of the printing layer 6, the printing speed is 300m/min, and the drying temperature is 40°C;
  • the polyurethane adhesive that is, the adhesive layer 4
  • the speed of coating the polyurethane adhesive is 180m/min
  • the side of the printing layer 6 coated with polyurethane adhesive is compounded with the heat-sealing layer 3 at a compounding speed of 180m/min; during compounding, the temperature of the first drying tunnel is 60°C, and the temperature of the second drying tunnel is 85°C. The temperature of the three-stage drying tunnel is 90°C, and the bonding temperature is 70°C;
  • a gravure printing machine is used to print text patterns on the inner side of the barrier layer 1, the printing speed is 300m/min, and the drying temperature is 40°C;
  • the side of the barrier layer 1 printed with the text pattern is compounded with the reinforcing layer 2 at a compounding speed of 180m/min; during compounding, the temperature of the first drying tunnel is 60°C, the temperature of the second drying tunnel is 85°C, and the temperature of the third drying tunnel is It is 90°C, and the bonding temperature is 70°C;
  • the compounding After the compounding is completed, it is cured in the curing room at 50°C for 60 hours; the moisture-proof layer is obtained.
  • the speed of coating the heat sealant is 200m/min; when the heat sealant is applied, the drying temperature of the first drying tunnel is 90°C, and the second drying tunnel The drying temperature is 120°C, and the drying temperature of the three-stage drying tunnel is 150°C; the coating amount of the heat sealant after drying is 6g/m 2 .
  • the composite film 11, the coated moisture-proof layer 12, and the breathable film 8 according to the specifications to obtain the required width roll material: the first side sheet 7, the second side sheet 10 (the breathable film 8), the moisture-proof layer 12 and the back sheet 9.
  • the first side sheet 7 and the bottom sheet 9 after the slitting are heat-sealed transversely, the heat-sealing temperature is 220°C, and the time is 0.5s;
  • the moisture-proof layer 12, the second side sheet 10 (breathable film 8) and the back sheet 9 are heat-sealed transversely, the heat-sealing temperature is 140°C, and the time is 1s; One side is covered on the second side sheet 10 (breathable film 8);
  • the first side sheet 7, the second side sheet 10 (the breathable film 8), the moisture-proof layer 12 and the back sheet 9 are longitudinally heat-sealed to form two side heat-sealed edges to obtain a bag with a containing cavity.
  • the temperature of the heat-sealing is The temperature is 150°C, and the time is 1s; and when longitudinally heat-sealing, the side of the second side sheet 10 (breathable film 8) away from the containing cavity is covered with the moisture-proof layer 12; the bottom sheet 9 is fixed on the first side sheet 7 and the second side sheet
  • the bottom of the desiccant bag is formed between 10; the first side sheet 7, the second side sheet 10 and the bottom sheet 9 form a containing cavity for containing the dehumidifying agent.
  • the dehumidification bag is finally cut to obtain the dehumidification bag; during cutting, the moisture-proof layer 12 in the dehumidification bag is provided with a structure that is easy to tear off the moisture-proof layer on the heat-sealed area.
  • the structure can be square, rectangular, or arc-shaped. , Ellipse, etc. (in this embodiment, a circular arc is used).
  • the ends of the first side sheet 7 and the second side sheet 10 away from the bottom sheet 9 can be heat sealed.
  • the heat-sealing strength of the moisture-proof layer and the breathable film of the prepared dehumidifying bag was tested, and the heat-sealing strength was 12N/15mm.
  • a dehumidification bag including:
  • a bag body the bag body includes a first side panel 7 and a second side panel 10, the first side panel 7 is composed of a first composite film, and the second side panel 10 is composed of a breathable film 8;
  • the accommodating cavity is formed by heat sealing the first side sheet 7 and the second side sheet 10;
  • the moisture-proof layer 12 covers the side of the second side sheet 10 (the breathable film 8) away from the containing cavity;
  • the lower end of the bag body is provided with a zipper 13 that can be opened and closed, and the length of the zipper is not less than the width of the upper end opening of the bag body (the length of the zipper in this embodiment is the same as the width of the upper end opening of the bag body), as shown in Figure 9 Shown.
  • the breathable film and the moisture-proof layer are in close contact without moisture absorption, which effectively prevents ventilation during transportation and storage.
  • the membrane When the membrane is in contact with the outside air, the effect of the dehumidifier becomes poor or ineffective; by setting the moisture-proof layer to be tearable, when the buyer uses it, the moisture-proof layer can be used only by tearing it off, which is convenient and fast.
  • the humidity because the humidity is heavier than air, the humidity will move downwards, so the bottom of the wardrobe or cabinet is the gathering point of moisture.
  • the existing dehumidification bag is hung on the clothes rail in the closet by hooks, which is the top of the closet. , Resulting in poor dehumidification effect; the dehumidification bag provided in this application can be placed at the bottom of a wardrobe or cabinet without a hook, and the dehumidification effect is good.
  • the moisture-proof layer 12 includes a barrier layer 1 (a polyethylene terephthalate film layer is used in this embodiment) and a reinforcing layer 2 (an aluminum foil layer is used in this embodiment);
  • the air-permeable membrane 8 is a non-woven fabric that is air-permeable and water-impermeable. Even if the dehumidification bag is inverted, since the air-permeable membrane is water-impermeable, the water in the bag will not flow out;
  • the first composite film is composed of heat-sealing layer 3 (polyethylene layer in this embodiment), adhesive layer 4, ink layer 5, and printing layer 6 (polyethylene terephthalate is used in this embodiment) in order from the inside to the outside.
  • Heat-sealing layer 3 polyethylene layer in this embodiment
  • adhesive layer 4 adhesive layer 4
  • ink layer 5 printing layer 6 (polyethylene terephthalate is used in this embodiment) in order from the inside to the outside.
  • Alcohol ester film layer) polyethylene terephthalate is used in this embodiment
  • the moisture-proof layer is not only in close contact with the breathable membrane, but also easy to tear off and convenient to use.
  • the thickness of the barrier layer 1 is 12-50 ⁇ m (12 ⁇ m is used in this embodiment); by limiting the thickness of the barrier layer, the sealing effect of the moisture barrier layer and the breathable film can be improved.
  • the thickness of the adhesive layer is 1-3 ⁇ m (3 ⁇ m is used in this embodiment);
  • the thickness of the ink layer is less than 3 ⁇ m (1 ⁇ m is used in this embodiment);
  • the thickness of the heat-sealing layer 3 is 30-150 ⁇ m (30 ⁇ m is used in this embodiment);
  • the thickness of the printing layer 6 is 12-50 ⁇ m (50 ⁇ m is used in this embodiment).
  • the number of times of recycling the dehumidification bag can be increased, and energy can be saved.
  • the end of the bag body is provided with a zipper seal that can be opened and closed.
  • the reinforcement layer 2 may also be a polyester aluminum-plated film layer, or a thin film layer formed of aluminum foil and polyethylene terephthalate.
  • the breathable membrane 8 may be Tyvek.
  • the heat-sealing layer 3 may be a cast polypropylene layer.
  • the printing layer 6 may be a polyamide layer or a polyethylene terephthalate film layer and a polyamide layer.
  • the preparation method of the above-mentioned dehumidification bag includes the following steps:
  • a gravure printing machine is used to print the text pattern (that is, the ink layer 5) on the inner side of the printing layer 6, the printing speed is 200m/min, and the drying temperature is 60°C;
  • the polyurethane adhesive that is, the adhesive layer 4
  • the speed of coating the polyurethane adhesive is 200m/min
  • the side of the printing layer 6 coated with polyurethane adhesive is compounded with the heat-sealing layer 3 at a compounding speed of 200m/min; during compounding, the temperature of the first drying tunnel is 60°C, and the temperature of the second drying tunnel is 75°C. The temperature of the three-stage drying tunnel is 80°C, and the bonding temperature is 60°C;
  • a gravure printing machine is used to print text patterns on the inner side of the barrier layer 1, the printing speed is 200m/min, and the drying temperature is 60°C;
  • the side of the barrier layer 1 printed with the text pattern is compounded with the reinforcing layer 2 at a compounding speed of 200m/min; during compounding, the temperature of the first drying tunnel is 60°C, the temperature of the second drying tunnel is 75°C, and the three drying tunnels The temperature is 80°C, and the bonding temperature is 60°C;
  • the compounding After the compounding is completed, it is cured in the curing room at 40°C for 48 hours; the moisture-proof layer is obtained.
  • the coating speed of the heat-sealing glue is 180m/min; when the heat-sealing glue is applied, the drying temperature of the first drying tunnel is 80°C, and the second drying The drying temperature of the tunnel is 100°C, and the drying temperature of the three-stage drying tunnel is 120°C; the coating amount of the heat sealant after drying is 5g/m 2 .
  • the composite film 11, the coated moisture-proof layer 12 and the air-permeable film 8 are respectively cut according to the specifications to obtain the required width roll materials: the first side sheet 7, the second side sheet 10 (air-permeable film) and the moisture-proof layer 12.
  • the lower ends of the first side panel 7, the second side panel 10, and the moisture-proof layer 12 after being cut are transversely heat-sealed to form an openable and closeable sealing structure (this embodiment uses an openable and closeable zipper 13), and the The length of the zipper is the same as the opening at the upper end of the bag; the heat-sealing temperature is 130°C, and the time is 1s; and the second side sheet 10 (breathable film) is located between the moisture-proof layer 12 and the first side sheet 7 when heat-sealing in the transverse direction.
  • the side of the moisture-proof layer 12 coated with the heat sealant is in contact with the second side sheet 10 (breathable film);
  • first side sheet 7, the second side sheet 10 and the moisture-proof layer 12 are longitudinally heat-sealed on two sides to form two side heat-sealed sides to obtain a bag with a containing cavity.
  • the heat-sealing temperature is 180°C.
  • the time is 0.8s; between the first side panel 7 and the second side panel 10, a containing cavity for holding the dehumidifier is formed;
  • the heat-sealing strength of the moisture-proof layer and the breathable film of the prepared dehumidifying bag was tested, and the heat-sealing strength was 10N/15mm.
  • the difference from Example 1 is only the heat-sealing temperature.
  • the specific heat-sealing temperature is as follows: firstly, the cut air-permeable film 8 and the second composite film 11 are partially overlapped to form the second side sheet 10, and the overlapped part of the air-permeable film 8 is located on the inner side of the second composite film 11; then the side coated with the heat sealant on the moisture-proof layer 12 is covered with the breathable film 8; and the moisture-proof layer 12 on the overlapping part of the breathable film 8 and the second composite film 11 is located The outer side of the second composite film 11, and then the lap joints of the moisture-proof layer 12, the breathable film 8 and the second composite film 11 are heat-sealed transversely, the heat-sealing temperature is 110°C, and the time is 0.5s;
  • the bottom sheet 9 is heat-sealed transversely with the first side sheet 7 and the second composite film 11 respectively; the heat-sealing temperature is 150°C, and the time is 0.8s;
  • the second side sheet 10 and the first side sheet 7, the moisture-proof layer 12 and the back sheet 9 are longitudinally heat-sealed on two sides to form two side heat-sealed sides to obtain a bag with a containing cavity.
  • the temperature of the heat-sealing is The temperature is 110° C., and the time is 0.5 s; and when longitudinally heat-sealing, the moisture-proof layer 12 is located on the side of the breathable film 8 away from the first side sheet 7.
  • the bottom sheet 9 is fixed between the first side sheet 7 and the second side sheet 10 to form the bottom of the dehumidification bag; a containing cavity for containing the dehumidifier is formed between the first side sheet 7, the second side sheet 10 and the back sheet 9 .
  • the heat-sealing strength of the moisture-proof layer and the breathable film of the prepared dehumidifying bag was tested, and the heat-sealing strength was 3N/15mm.
  • the difference from Example 1 is only the heat-sealing temperature.
  • the specific heat-sealing temperature is as follows: firstly, the cut breathable film 8 and the second composite film 11 are partially overlapped to form the second side sheet 10, and the overlapped portion of the breathable film 8 is located on the inner side of the second composite film 11; then the side coated with the heat sealant on the moisture-proof layer 12 is covered with the breathable film 8; and the moisture-proof layer 12 on the overlapping part of the breathable film 8 and the second composite film 11 is located The outer side of the second composite film 11, and then the lap joints of the moisture-proof layer 12, the breathable film 8 and the second composite film 11 are heat-sealed transversely, the heat-sealing temperature is 250°C, and the time is 0.5s;
  • the bottom sheet 9 is heat-sealed transversely with the first side sheet 7 and the second composite film 11 respectively; the heat-sealing temperature is 150°C, and the time is 0.8s;
  • the second side sheet 10 and the first side sheet 7, the moisture-proof layer 12 and the back sheet 9 are longitudinally heat-sealed on two sides to form two side heat-sealed sides to obtain a bag with a containing cavity.
  • the temperature of the heat-sealing is The temperature is 250° C., and the time is 0.5 s; and when longitudinally heat-sealing, the moisture-proof layer 12 is located on the side of the breathable film 8 away from the first side sheet 7.
  • the bottom sheet 9 is fixed between the first side sheet 7 and the second side sheet 10 to form the bottom of the dehumidification bag; a containing cavity for containing the dehumidifier is formed between the first side sheet 7, the second side sheet 10 and the back sheet 9 .
  • the heat-sealing strength of the moisture-proof layer and the breathable film of the prepared dehumidification bag was tested, and the heat-sealing strength was 30N/15mm.

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Abstract

一种除湿袋及其制备方法，除湿袋包括：袋体，包括第一侧片（7）和第二侧片（10），侧片（7，10）包括透气膜（8）和/或复合膜（11），其中，至少一个侧片（7，10）的全部或部分为透气膜（8）；防潮层（12），覆盖于透气膜（8）外侧。该除湿袋通过在袋体上设置透气膜（8），并将其外表面与防潮层（12）热封合，使得透气膜（8）与防潮层（12）紧密接触，且不吸湿，有效地防止在运输和储存的过程中，透气膜（8）与外袋中空气接触导致除湿剂效果变差或者是失效；通过将防潮层（12）设置成可撕掉的，当购买者使用时，只需将防潮层（12）撕掉就可以使用，方便、快捷。

Description

一种除湿袋及其制备方法
交叉引用
本申请要求在2020年6月3日提交中国专利局、申请号为202010497330.1、发明名称为“一种除湿袋及其制备方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及除湿包装技术领域，具体涉及一种除湿袋及其制备方法。
背景技术
每年的6-7月份是我国中南部地区的梅雨季节，由于降雨丰沛，地面蒸发能力加强，空气湿度大，气温高，使得霉菌的繁殖生长速度显著提升，导致衣柜里的衣物特别容易发霉，不但味道难闻而且还会有霉斑。
为防止衣物发霉，人们往往会在衣柜内放置除湿剂，目前市场上的除湿包装应用最为广泛的是带有挂钩的复合包装袋，一般是由外袋、内袋体、挂钩和固定夹扣构成，其中，挂钩位于固定夹扣的上部，挂钩与固定夹扣采用的材质是塑料，固定夹扣用于夹住袋体干燥剂装入口，内袋体由上层干燥剂袋(一般是无纺布材质)与下层吸湿水袋通过封合组合为一体，上层干燥剂袋底部设有若干个渗透孔，透气通孔设置在袋体的表面两侧上，袋体悬挂在衣柜内。
上述除湿袋虽然具有一定的除湿功效，但是，内袋、外袋这种双层结构设计在装入除湿剂后，由无纺布制成的上层干燥剂袋在储存的过程中只有外袋一个保护层，而且无纺布具有透气性，装入除湿剂后，干燥剂可以通过透气的无纺布吸收外袋内空气中的水分，导致除湿剂的效果变差或失效。
发明内容
因此，本申请要解决的技术问题在于克服现有技术中装有除湿剂的除湿袋在储存和运输过程中吸收外袋内空气中的水分、会导致除湿剂的效果变差或失效的缺陷，从而提供一种除湿袋及其制备方法。
为此，本申请提供如下技术方案：
一种除湿袋，包括：
袋体，包括第一侧片和第二侧片，所述侧片包括透气膜和/或复合膜，其中，至少一个侧片的全部或部分为透气膜；
容纳腔，由所述第一侧片和第二侧片热封形成；
防潮层，覆盖于所述透气膜的外侧。该防潮层是可撕掉的。
进一步地，所述袋体还包括底片，与所述第一侧片和第二侧片共同热封形成容纳腔。当所述除湿袋包括底片时，其可实现自立，也称为除湿自立袋。
进一步地，所述袋体上设置有可开合的密封结构。所述可开合的密封结构可以是拉链或者密封条等。
进一步地，所述防潮层包括增强层和阻隔层；
所述阻隔层为聚对苯二甲酸乙二醇酯薄膜层；
所述增强层为铝箔层，聚酯镀铝膜层或铝箔和聚对苯二甲酸乙二醇酯形成的薄膜层；
所述透气膜为无纺布或特卫强。
所述阻隔层的一面或者双面可设置图案层；图案层上可显示与产品相关的一些文字或者是图案的说明，便于消费者了解。
进一步地，所述阻隔层的厚度为12-50μm。
所述复合膜可以为常规的复合膜，例如聚乙烯膜等。进一步地优选的，所述复合膜由内到外依次为热封层、粘合层、油墨层和承印层；
所述热封层为聚乙烯层或流延聚丙烯层；
所述承印层为聚对苯二甲酸乙二醇酯薄膜层和/或聚酰胺层。
进一步地，所述粘合层的厚度为1-3μm；
所述油墨层的厚度小于3μm；
所述热封层的厚度为30-150μm；
所述承印层的厚度为12-50μm。
进一步地，所述防潮层上设置易拉结构。该易拉结构伸出热封端，且可以是是正方形、长方形、圆弧形、椭圆形等。
本申请还提供了一种除湿袋的制备方法，包括如下步骤：
将防潮层与第一侧片和第二侧片热封，得所述除湿袋，其中，所述侧片由透气膜和/或复合膜组成，至少一个侧片的全部或部分为透气膜；所述防潮层位于所述透气膜的外侧。
当有一个侧片的全部为透气膜时，将全部为透气膜的侧片置于复合膜侧片和防潮层之间，然后进行热封，即得所述除湿袋，该除湿袋在透气膜和复合膜之间形成用于盛放除湿剂的容纳腔。
当两个侧片全部为透气膜时，将两个透气膜置于两个防潮层之间，然后进行热封，即得所述除湿袋，该除湿袋在两个透气膜之间形成用于盛放除湿剂的容纳腔。
当有一个侧片的部分为透气膜时，透气膜与复合膜搭接形成复合侧片(即由透气膜与复合膜组成的侧片)，且搭接部分的透气膜位于复合膜的内侧；然后将其与另一个侧片和防潮层热封，即得所述除湿袋，热封时，防潮层位于透气膜上远离另一侧片的一侧，该除湿袋在复合侧片和全部为复合膜的侧片之间形成用于盛放除湿剂的容纳腔。
当有两个侧片的部分为透气膜时，透气膜与复合膜搭接形成复合侧片(即由透气膜与复合膜组成的侧片)，且搭接部分的透气膜位于复合膜的内侧；然后两个复合侧片和防潮层热封，且防潮层位于透气膜上远离另一复合侧片的一侧；即得所述除湿袋，该除湿袋在两个复合侧片之间形成用于盛放除湿剂的容纳腔。
进一步地，在进行热封时，先进行横向热封，再进行纵向热封形成两个侧热封边。
进一步地，还包括底片，将防潮层与底片、第一侧片和第二侧片热封，得所述除湿袋。所述底片可以是能够支撑袋体自立的任何形状，例如椭圆形，圆形等。
进一步地，所述热封温度为130-220℃，时间为0.5-1s。
进一步地，热封之前还包括在所述防潮层上涂布热封胶的步骤；其中，所述涂布热封胶的速度≤200m/min；
涂布热封胶时，一段烘道的烘干温度为70-90℃，二段烘道的烘干温度为80-120℃，三段烘道的烘干温度为90-150℃；
烘干后热封胶的涂布量为3-6g/m 2。
进一步地，所述防潮层由内到外依次为增强层和阻隔层；所述复合膜由内到外依次为热封层、粘合层、油墨层和承印层；
还包括在所述阻隔层和/或所述承印层印刷油墨图案的步骤，其中，印刷的速度为100-300m/min，烘干温度为40-80℃。
进一步地，所述防潮层的制备步骤为，将印刷油墨图案后的阻隔层与增强层复合、熟化得防潮层；
所述复合层的制备方法为，将承印层与粘合层和热封层复合、熟化得复合层。
进一步地，所述复合的速度≤200m/min；
复合时，一段烘干的温度为50-60℃，二段烘干的温度为65-85℃，三段烘干的温度为75-90℃，贴合温度为50-70℃；复合完成后，在40-50℃熟化，熟化时间≥48h。
本申请技术方案，具有如下优点：
1.本申请提供的除湿袋，包括：袋体，包括第一侧片和第二侧片，所述侧片包括透气膜和/或复合膜，其中，至少一个侧片的全部或部分为透气膜；防潮层，覆盖于所述透气膜外侧。本申请提供的除湿袋通过在袋体上设置透气膜，并将该层的外表面用防潮层覆盖并热封合，使得透气膜与防潮层紧密接触，且不吸湿，有效地防止在运输和储存的过程中，透气膜与外袋中空气接触导致除湿剂效果变差或者是失效；而且该防潮层是可撕掉的，当购买者使用时，只需将防潮层撕掉就可以使用，方便、快捷。此外，由于湿气比空气重，湿气会向下方活动，所以衣柜或橱柜的底部是湿气的聚集点，现有的除湿袋通过挂钩悬挂在衣柜内的挂衣杆上也就是衣柜的上方，导致除湿效果差；本申请提供的除湿袋可放置于衣柜或橱柜的底部，无需挂钩，除湿效果好。
2.本申请提供的除湿袋，通过设置底片，可实现自立。所述底片可以为现有的自立袋底部的任何形状的水平支撑结构，使得袋子不依靠任何支撑，即可自行站立。
3.本申请提供的除湿袋，通过设置可开合的密封结构，待除湿袋内的除湿剂失效后，购买者可自行打开更换新的除湿剂，然后将闭合自密封结构，继续使用，达到重复利用的效果，节约成本和能源。
4.本申请提供的除湿袋，通过限定所述透气膜为无纺布或特卫强；不管是无纺布还是特卫强都具有透气性好，但是不漏水，均可让空气中的水蒸气透过，然后让袋内的除湿剂吸附，达到除湿目的，即使除湿袋倒了，由于透气膜不透水，袋内的水也不会流出；通过限定所述 防潮层包括阻隔层和增强层；所述阻隔层为聚对苯二甲酸乙二醇酯薄膜层，所述增强层为铝箔层，聚酯镀铝膜层，或者是铝箔和聚对苯二甲酸乙二醇酯形成的薄膜层；使得防潮层和透气不透水层的热封强度可保持在5-20N/15mm；使得防潮层不仅与透气膜的接触性好，而且易于撕掉，使用方便。
5.本申请提供的除湿袋，通过限定阻隔层的厚度，可提高运输或者是储存过程中的防潮效果，也就是提高防潮层与透气层的密封性效果。
6.本申请提供的除湿袋，通过限定复合膜的层结构及每一层的厚度，可进一步提高防潮层与透气层的密封性效果。
7.本申请提供的除湿袋，通过在所述防潮层上伸出热封处设置易于撕开防潮层的结构，更方便购买者对防潮层的撕开。
8.本申请提供的除湿袋的制备方法，包括如下步骤：将防潮层与第一侧片和第二侧片热封，得所述除湿袋，其中，所述侧片由透气膜和/或复合膜组成，至少一个侧片的全部或部分为透气膜；所述防潮层位于所述透气膜的外侧。
通过将防潮层覆盖于所述透气膜的外侧，制得的除湿袋中透气膜与防潮层紧密接触，且不吸湿，有效地防止在运输和储存的过程中，透气膜与外界空气接触导致除湿剂效果变差或者是失效；且防潮层是可撕掉的，当购买者使用时，只需将防潮层撕掉就可以使用，方便、快捷。此外，由于湿气比空气重，湿气会向下方活动，所以衣柜或橱柜的底部是湿气的聚集点，现有的除湿袋通过挂钩悬挂在衣柜内的挂衣杆上也就是衣柜的上方，导致除湿效果差；本申请提供的除湿袋可放置于衣柜或橱柜的底部，无需挂钩，除湿效果好；而且本申请提供的除湿袋的制备方法，简单方便，热封即可，节省材料。
9.本申请提供的除湿袋的制备方法，通过将防潮层、底片、第一侧片和第二侧片热封，形成具有容纳腔的袋体，可实现自立。
10.本申请提供的除湿袋的制备方法，通过对热封的温度和时间进行限定，防止热封后在热封的地方出现褶皱、小气泡或者是脱层的现象，可提高制得的除湿袋中防潮层与透气膜的密封效果，同时平衡防潮层的可撕开的效果，使得透气膜与防潮层紧密接触，且不吸湿，有效地防止在运输和储存的过程中，透气膜与外界空气接触导致除湿剂效果变差或者是失效；当购买者使用时，只需将防潮层撕掉就可以使用，方便、快捷。此外，由于湿气比空气重，湿气会向下方活动，所以衣柜或橱柜的底部是湿气的聚集点，现有的除湿袋通过挂钩悬挂在衣柜内的挂衣杆上也就是衣柜的上方，导致除湿效果差；上述方法制得的除湿袋可放置于衣柜或橱柜的底部，无需挂钩，除湿效果好。
11.本申请提供的除湿袋的制备方法，通过对涂布热封胶的速度和温度及烘干后热封胶的涂布量进行限定，可提高涂布的均匀性，进一步优化防潮层与透气膜的密封性及可撕开性能。
12.本申请提供的除湿袋的制备方法，通过对印刷的速度及烘干的温度进行限定，使得印刷图文套印准确，印刷油墨均匀，而且颜色无明显色差。
13.本申请提供的除湿袋的制备方法，通过对复合的速度、复合温度、贴合温度以及复合后熟化的温度和时间进行限定，可提高复合的牢固性和强度，并防止溶剂残留超标和异味，环保健康。
附图说明
为了更清楚地说明本申请具体实施方式或现有技术中的技术方案，下面将对具体实施方式或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例1中除湿袋的主视图；
图2是本申请实施例1中第二侧片的结构示意图；
图3是本申请实施例1中除湿袋的后视图；
图4是图1中A-A面的剖视图；
图5是本申请实施例1中除湿袋的仰视图；
图6是本申请实施例1中除湿袋的立体结构示意图；
图7是本申请实施例1中防潮层的结构示意图；
图8是本申请中实施例1中第二复合膜的结构示意图；
图9是本申请中实施例3中除湿袋的主视图。
附图标记：
1-阻隔层；2-增强层；3-热封层；4-粘合层；5-油墨层；6-承印层；7-第一侧片；8-透气膜；9-底片；10-第二侧片；11-第二复合膜；12-防潮层；13-可开合的拉链。
具体实施方式
提供下述实施例是为了更好地进一步理解本申请，并不局限于所述最佳实施方式，不对本申请的内容和保护范围构成限制，任何人在本申请的启示下或是将本申请与其他现有技术的特征进行组合而得出的任何与本申请相同或相近似的产品，均落在本申请的保护范围之内。
实施例中未注明具体实验步骤或条件者，按照本领域内的文献所描述的常规实验步骤的操作或条件即可进行。所用试剂或仪器未注明生产厂商者，均为可以通过市购获得的常规试剂产品。
实施例1
一种除湿袋，如图1-8所示，包括：
袋体，所述袋体包括第一侧片7、第二侧片10和底片9，所述第一侧片7由第一复合膜构成，所述第二侧片10包括透气膜8和第二复合膜11；所述底片9由第三复合膜构成；且第一复合膜、第二复合膜11和第三复合膜结构和组成相同；
容纳腔，由所述第一侧片7、第二侧片10和底片9热封形成；
防潮层12，覆盖于所述透气膜8远离所述容纳腔的一侧。
通过在袋体上设置透气膜，并将该层的外表面用防潮层热封合，使得透气膜与防潮层紧密接触，且不吸湿，有效地防止在运输和储存的过程中，透气膜与外界空气接触导致除湿剂效果变差或者是失效；且防潮层是可撕掉的，当购买者使用时，只需将防潮层撕掉就可以使用，方便、快捷。通过设置底片，使得除湿袋不依靠任何支撑，只通过底片即可自行站立。此外，由于湿气比空气重，湿气会向下方活动，所以衣柜或橱柜的底部是湿气的聚集点，现有的除湿袋通过挂钩悬挂在衣柜内的挂衣杆上也就是衣柜的上方，导致除湿效果差；本申请提供的除湿袋可放置于衣柜或橱柜的底部，无需挂钩，除湿效果好。
如图7所示，所述防潮层12包括阻隔层1(本实施例采用聚对苯二甲酸乙二醇酯薄膜层)和增强层2(本实施例采用铝箔层)；
所述透气膜8为透气不透水的无纺布，即使除湿袋倒了，由于透气膜不透水，袋内的水也不会流出；
如图8所示，所述第一复合膜、第二复合膜11和第三复合膜均由以下的复合层构成：由内到外依次为热封层3(本实施例采用聚乙烯层)、粘合层4、油墨层5和承印层6(本实施例采用聚对苯二甲酸乙二醇酯薄膜层)；
通过采用上述的材质使得防潮层不仅与透气膜的接触性好，而且易于撕掉，使用方便。
所述阻隔层1的厚度为12-50μm(本实施例采用30μm)；通过限定阻隔层的厚度可提高防潮层与透气膜的密封效果。
所述粘合层4的厚度为1-3μm(本实施例采用3μm)；
所述油墨层5的厚度小于3μm(本实施例采用2μm)；
所述热封层3的厚度为30-150μm(本实施例采用55μm)；
所述承印层6的厚度为12-50μm(本实施例采用30μm)。
通过限定复合膜的层结构及每一层的厚度，可提高除湿袋的回收利用的次数，节约能源。
所述透气膜8和第二复合膜11通过搭接热封在一起；
作为一种可替换的实施方式，所述增强层2还可以为聚酯镀铝膜层，或者是铝箔和聚对苯二甲酸乙二醇酯形成的薄膜层。
作为另一种可替换的实施方式，所述透气膜8可以为特卫强。
作为再另一种可替换的实施方式，所述热封层3可以为流延聚丙烯层。
作为再另一种可替换的实施方式，所述承印层6可以为聚酰胺层或者是聚对苯二甲酸乙二醇酯薄膜层和聚酰胺层。
上述除湿袋的制备方法包括如下步骤：
复合膜的制备：
首先采用凹版印刷机在承印层6的内侧印刷文字图案(也就是油墨层5)，印刷的速度为100m/min，烘干温度为80℃；
然后在承印层6印刷文字图案的一侧涂覆聚氨酯胶黏剂(也就是粘合层4)，涂覆聚氨酯胶黏剂的速度160m/min；
之后将承印层6涂覆聚氨酯胶黏剂的一侧与热封层3的复合，复合速度160m/min；复合时，一段烘道的温度为50℃，二段烘道的温度为65℃，三段烘道的温度为75℃，贴合温度为50℃；
复合完成后，在熟化室于45℃的熟化，熟化时间48h，即得复合膜。
防潮层的制备：
首先，采用凹版印刷机在阻隔层1的内侧印刷文字图案，印刷的速度为100m/min，烘干温度为80℃；
然后将阻隔层1印刷有文字图案的一侧与增强层2复合，复合速度160m/min；复合时，一段烘道的温度为50℃，二段烘道的温度为65℃，三段烘道的温度为75℃，贴合温度为50℃；
复合完成后，在熟化室于45℃熟化，熟化时间48h，即得防潮层。
涂布：
在防潮层12的增强层2一侧涂布热封胶；其中，涂布热封胶的速度160m/min；涂布热封胶时，一段烘道的烘干温度为70℃，二段烘道的烘干温度为80℃，三段烘道的烘干温度为90℃；烘干后热封胶的涂布量为3g/m 2。
分切：
按照规格分别分切复合膜11、涂布后的防潮层12和透气膜8，得到所需宽度卷材：第一侧片7、第二复合膜11、防潮层12、透气膜8和底片9。
热封：
首先将分切后的透气膜8与第二复合膜11部分搭接形成第二侧片10，且搭接部分透气膜8位于第二复合膜11的内侧；然后将防潮层12上涂布热封胶的一侧覆盖透气膜8；且在透气膜8与第二复合膜11的搭接部分的防潮层12位于第二复合膜11的外侧，然后将防潮层12、透气膜8和第二复合膜11的搭接处进行横向热封，热封温度为180℃，时间为0.5s；
之后将底片9分别与第一侧片7和第二复合膜11进行横向热封；热封温度为150℃，时间为0.8s；
最后将第二侧片10与第一侧片7、防潮层12和底片9进行两个侧边的纵向热封形成两个侧热封边，得到具有容纳腔体的袋体，热封的温度为220℃，时间为0.5s；且纵向热封时，防潮层12位于透气膜8上远离第一侧片7的一侧。底片9固定在第一侧片7和第二侧片10之间形成除湿袋的底部；在第一侧片7、第二侧片10和底片9之间形成用于盛放除湿剂的容纳腔；
最后裁剪即得所述除湿袋。
待除湿袋内装入防湿剂后，可将第一侧片7和第二侧片10远离底片9的一端热封。
将制得除湿袋的防潮层和透气膜热封强度进行测试，其热封强度为18N/15mm。
实施例2
一种除湿袋，如图7所示，包括：
袋体，所述袋体包括第一侧片7、第二侧片10和底片9，所述第一侧片7由第一复合膜构成；所述底片9由第三复合膜构成，所述第二侧片10为透气膜8；且第一复合膜和第三复合膜的结构和组成相同；
容纳腔，由所述第一侧片7、第二侧片10和底片9热封形成；
防潮层12，覆盖于所述透气膜8远离所述容纳腔的一侧，且防潮层12伸出热封处设置易于撕开防潮层的结构，该结构可以是是正方形、长方形、圆弧形、椭圆形等(本实施例采用圆弧形)。
通过在袋体上设置透气膜，并将该层的外表面用防潮层覆盖并热封合，使得透气膜与防潮层紧密接触，且不吸湿，有效地防止在运输和储存的过程中，透气膜与外界空气接触导致除湿剂效果变差或者是失效；通过将防潮层设置成可撕掉的，当购买者使用时，只需将防潮层撕掉就可以使用，方便、快捷。此外，由于湿气比空气重，湿气会向下方活动，所以衣柜或橱柜的底部是湿气的聚集点，现有的除湿袋通过挂钩悬挂在衣柜内的挂衣杆上也就是衣柜的上方，导致除湿效果差；本申请提供的除湿袋可放置于衣柜或橱柜的底部，无需挂钩，除湿效果好。
所述防潮层12包括阻隔层1(本实施例采用聚对苯二甲酸乙二醇酯薄膜层)和增强层2(本实施例采用聚酯镀铝膜层)；
所述透气膜8为透气不透水的特卫强，即使除湿袋倒了，由于透气膜不透水，袋内的水也不会流出；
所述第一复合膜和第三复合膜均由以下的复合层构成：由内到外依次为热封层3(本实施例采用聚乙烯层)、粘合层4、油墨层5和承印层6(本实施例采用聚对苯二甲酸乙二醇酯薄膜层)；
通过采用上述的材质使得防潮层不仅与透气膜的紧密接触，而且易于撕掉，使用方便。
所述阻隔层1的厚度为12-50μm(本实施例采用50μm)；通过限定阻隔层的厚度可提高防潮层与透气膜的密封效果。
所述粘合层的厚度为1-3μm(本实施例采用2μm)；
所述油墨层的厚度小于3μm(本实施例采用3μm)；
所述热封层3的厚度为30-150μm(本实施例采用150μm)；
所述承印层6的厚度为12-50μm(本实施例采用12μm)。
通过限定复合膜的层结构及每一层的厚度，可提高除湿袋的回收利用的次数，节约能源。
作为一种可替换的实施方式，所述增强层2还可以为铝箔层，或者是铝箔和聚对苯二甲酸乙二醇酯形成的薄膜层。
作为另一种可替换的实施方式，所述透气膜8可以为无纺布。
作为再另一种可替换的实施方式，所述热封层3可以为流延聚丙烯层。
作为再另一种可替换的实施方式，所述承印层6可以为聚酰胺层或者是聚对苯二甲酸乙二醇酯薄膜层和聚酰胺层。
上述除湿袋的制备方法包括如下步骤：
复合膜的制备：
首先采用凹版印刷机在承印层6的内侧印刷文字图案(也就是油墨层5)，印刷的速度为300m/min，烘干温度为40℃；
然后在承印层6印刷文字图案的一侧涂覆聚氨酯胶黏剂(也就是粘合层4)，涂覆聚氨酯胶黏剂的速度180m/min；
之后将承印层6涂覆聚氨酯胶黏剂的一侧与热封层3的复合，复合速度180m/min；复合时，一段烘道的温度为60℃，二段烘道的温度为85℃，三段烘道的温度为90℃，贴合温度为70℃；
复合完成后，在熟化室于50℃的熟化，熟化时间60h；即得复合膜。
防潮层的制备：
首先，采用凹版印刷机在阻隔层1的内侧印刷文字图案，印刷的速度为300m/min，烘干温度为40℃；
阻隔层1印刷有文字图案的一侧与增强层2复合，复合速度180m/min；复合时，一段烘道的温度为60℃，二段烘道的温度为85℃，三段烘道的温度为90℃，贴合温度为70℃；
复合完成后，在熟化室于50℃熟化，熟化时间60h；即得防潮层。
涂布：
在防潮层12的增强层2一侧涂布热封胶；其中涂布热封胶的速度200m/min；涂布热封胶时，一段烘道的烘干温度为90℃，二段烘道的烘干温度为120℃，三段烘道的烘干温度为150℃；烘干后热封胶的涂布量为6g/m 2。
分切：
按照规格分别分切复合膜11、涂布后的防潮层12和透气膜8，得到所需宽度卷材：第一侧片7、第二侧片10(透气膜8)、防潮层12和底片9。
热封：
首先将分切后的第一侧片7与底片9进行横向热封，热封温度为220℃，时间为0.5s；
然后将防潮层12和第二侧片10(透气膜8)和底片9进行横向热封，热封温度为140℃，时间为1s；且热封时，防潮层12中涂布热封胶的一侧覆盖于第二侧片10(透气膜8)上；
之后将第一侧片7、第二侧片10(透气膜8)、防潮层12和底片9进行纵向热封形成两个侧热封边，得到具有容纳腔体的袋体，热封的温度为150℃，时间为1s；且纵向热封时，第二侧片10(透气膜8)远离容纳腔体的一侧覆盖防潮层12；底片9固定在第一侧片7和第二侧片10之间形成除湿袋的底部；第一侧片7、第二侧片10和底片9之间形成用于盛放除湿剂的容纳腔。
最后裁剪即得所述除湿袋；在裁剪时，所述除湿袋中的防潮层12上伸出热封处设置有易于撕开防潮层的结构，该结构可以是是正方形、长方形、圆弧形、椭圆形等(本实施例采用圆弧形)。
待除湿袋内装入防湿剂后，可将第一侧片7和第二侧片10远离底片9的一端热封。
将制得除湿袋的防潮层和透气膜热封强度进行测试，其热封强度为12N/15mm。
实施例3
一种除湿袋，包括：
袋体，所述袋体包括第一侧片7、第二侧片10，所述第一侧片7由第一复合膜构成，所述第二侧片10由透气膜8构成；
容纳腔，由所述第一侧片7和第二侧片10热封形成；
防潮层12，覆盖于所述第二侧片10(透气膜8)远离所述容纳腔的一侧；
所述袋体的下端设置有可开合的拉链13，且所述拉链的长度不小于袋体上端开口的宽度(本实施例中拉链的长度与袋体上端开口的宽度一致)，如图9所示。
通过在袋体上设置透气膜，并将该层的外表面用防潮层覆盖并热封合，使得透气膜与防潮层紧密接触，且不吸湿，有效地防止在运输和储存的过程中，透气膜与外界空气接触导致除湿剂效果变差或者是失效；通过将防潮层设置成可撕掉的，当购买者使用时，只需将防潮层撕掉就可以使用，方便、快捷。此外，由于湿气比空气重，湿气会向下方活动，所以衣柜或橱柜的底部是湿气的聚集点，现有的除湿袋通过挂钩悬挂在衣柜内的挂衣杆上也就是衣柜的上方，导致除湿效果差；本申请提供的除湿袋可放置于衣柜或橱柜的底部，无需挂钩，除湿效果好。
所述防潮层12包括阻隔层1(本实施例采用聚对苯二甲酸乙二醇酯薄膜层)和增强层2(本实施例采用铝箔层)；
所述透气膜8为透气不透水的无纺布，即使除湿袋倒了，由于透气膜不透水，袋内的水也不会流出；
所述第一复合膜由内到外依次为热封层3(本实施例采用聚乙烯层)、粘合层4、油墨层5和承印层6(本实施例采用聚对苯二甲酸乙二醇酯薄膜层)；
通过采用上述的材质使得防潮层不仅与透气膜的紧密接触，而且易于撕掉，使用方便。
所述阻隔层1的厚度为12-50μm(本实施例采用12μm)；通过限定阻隔层的厚度可提高防潮层与透气膜的密封效果。
所述粘合层的厚度为1-3μm(本实施例采用3μm)；
所述油墨层的厚度小于3μm(本实施例采用1μm)；
所述热封层3的厚度为30-150μm(本实施例采用30μm)；
所述承印层6的厚度为12-50μm(本实施例采用50μm)。
通过限定复合膜的层结构及每一层厚度，可提高除湿袋的回收利用的次数，节约能源。
所述袋体的端部设置有可开合拉链密封。
作为一种可替换的实施方式，所述增强层2还可以为聚酯镀铝膜层，或者是铝箔和聚对苯二甲酸乙二醇酯形成的薄膜层。
作为另一种可替换的实施方式，所述透气膜8可以为特卫强。
作为再另一种可替换的实施方式，所述热封层3可以为流延聚丙烯层。
作为再另一种可替换的实施方式，所述承印层6可以为聚酰胺层或者是聚对苯二甲酸乙二醇酯薄膜层和聚酰胺层。
上述除湿袋的制备方法包括如下步骤：
复合膜的制备：
首先采用凹版印刷机在承印层6的内侧印刷文字图案(也就是油墨层5)，印刷的速度为200m/min，烘干温度为60℃；
然后在承印层6印刷文字图案的一侧涂覆聚氨酯胶黏剂(也就是粘合层4)，涂覆聚氨酯胶黏剂的速度200m/min；
之后将承印层6涂覆聚氨酯胶黏剂的一侧与热封层3的复合，复合速度200m/min；复合时，一段烘道的温度为60℃，二段烘道的温度为75℃，三段烘道的温度为80℃，贴合温度为60℃；
复合完成后，在熟化室于40℃的熟化，熟化时间48h；即得复合膜。
防潮层的制备：
首先，采用凹版印刷机在阻隔层1的内侧印刷文字图案，印刷的速度为200m/min，烘干温度为60℃；
然后将阻隔层1印刷有文字图案的一侧与增强层2复合，复合速度200m/min；复合时，一段烘道的温度为60℃，二段烘道的温度为75℃，三段烘道的温度为80℃，贴合温度为60℃；
复合完成后，在熟化室于40℃熟化，熟化时间48h；即得防潮层。
涂布：
在防潮层12的增强层2一侧涂布热封胶；其中，涂布热封胶的速度180m/min；涂布热封胶时，一段烘道的烘干温度为80℃，二段烘道的烘干温度为100℃，三段烘道的烘干温度为120℃；烘干后热封胶的涂布量为5g/m 2。
分切：
按照规格分别分切复合膜11、涂布后的防潮层12和透气膜8，得到所需宽度卷材：第一侧片7、第二侧片10(透气膜)和防潮层12。
热封：
首先将分切后的第一侧片7、第二侧片10和防潮层12的下端进行横向热封形成可开合的密封结构(本实施例采用可开合的拉链13)，且所述拉链的长度与袋体上端开口的一致；热封温度为130℃，时间为1s；且横向热封时，第二侧片10(透气膜)位于防潮层12和第一侧片7之间，防潮层12中涂布热封胶的一侧与第二侧片10(透气膜)接触；
然后将第一侧片7、第二侧片10和防潮层12进行两个侧边的纵向热封形成两个侧热封边，得到具有容纳腔体的袋体，热封的温度为180℃，时间为0.8s；在第一侧片7和第二侧片10之间形成用于盛放除湿剂的容纳腔；
待除湿袋内装入防湿剂后，在第一侧片7、第二侧片10和防潮层12的另一端进行热封。
将制得除湿袋的防潮层和透气膜热封强度进行测试，其热封强度为10N/15mm。
对比例1
与实施例1的区别仅在于热封温度不同，具体热封温度为：首先将分切后的透气膜8与第二复合膜11部分搭接形成第二侧片10，且搭接部分透气膜8位于第二复合膜11的内侧；然后将防潮层12上涂布热封胶的一侧覆盖透气膜8；且在透气膜8与第二复合膜11的搭接部分的防潮层12位于第二复合膜11的外侧，然后将防潮层12、透气膜8和第二复合膜11的搭接处进行横向热封，热封温度为110℃，时间为0.5s；
之后将底片9分别与第一侧片7和第二复合膜11进行横向热封；热封温度为150℃，时间为0.8s；
最后将第二侧片10与第一侧片7、防潮层12和底片9进行两个侧边的纵向热封形成两个侧热封边，得到具有容纳腔体的袋体，热封的温度为110℃，时间为0.5s；且纵向热封时，防潮层12位于透气膜8上远离第一侧片7的一侧。底片9固定在第一侧片7和第二侧片10之间形成除湿袋的底部；在第一侧片7、第二侧片10和底片9之间形成用于盛放除湿剂的容纳腔。
将制得除湿袋的防潮层和透气膜热封强度进行测试，其热封强度为3N/15mm。
对比例2
与实施例1的区别仅在于热封温度不同，具体热封温度为：首先将分切后的透气膜8与第二复合膜11部分搭接形成第二侧片10，且搭接部分透气膜8位于第二复合膜11的内侧；然后将防潮层12上涂布热封胶的一侧覆盖透气膜8；且在透气膜8与第二复合膜11的搭接部分的防潮层12位于第二复合膜11的外侧，然后将防潮层12、透气膜8和第二复合膜11的搭接处进行横向热封，热封温度为250℃，时间为0.5s；
之后将底片9分别与第一侧片7和第二复合膜11进行横向热封；热封温度为150℃，时间为0.8s；
最后将第二侧片10与第一侧片7、防潮层12和底片9进行两个侧边的纵向热封形成两个侧热封边，得到具有容纳腔体的袋体，热封的温度为250℃，时间为0.5s；且纵向热封时，防潮层12位于透气膜8上远离第一侧片7的一侧。底片9固定在第一侧片7和第二侧片10之间形成除湿袋的底部；在第一侧片7、第二侧片10和底片9之间形成用于盛放除湿剂的容纳腔。
将制得除湿袋的防潮层和透气膜热封强度进行测试，其热封强度为30N/15mm。
显然，上述实施例仅仅是为清楚地说明所作的举例，而并非对实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引申出的显而易见的变化或变动仍处于本申请创造的保护范围之中。

Claims (15)

  1. 一种除湿袋，其特征在于，包括：
    袋体，包括第一侧片和第二侧片，所述侧片包括透气膜和/或复合膜，其中，至少一个侧片的全部或部分为透气膜；
    防潮层，覆盖于所述透气膜外侧。
  2. 根据权利要求1所述的除湿袋，其特征在于，所述袋体还包括底片。
  3. 根据权利要求1所述的除湿袋，其特征在于，所述袋体上设置有可开合的密封结构。
  4. 根据权利要求1-3任一项所述的除湿袋，其特征在于，所述防潮层包括增强层和阻隔层；
    优选的，所述阻隔层为聚对苯二甲酸乙二醇酯薄膜层；
    所述增强层为铝箔层，聚酯镀铝膜层或铝箔和聚对苯二甲酸乙二醇酯形成的薄膜层；
    所述透气膜为无纺布或特卫强。
  5. 根据权利要求4所述的除湿袋，其特征在于，所述阻隔层的厚度为12-50μm。
  6. 根据权利要求1-3任一项所述的除湿袋，其特征在于，所述复合膜由内到外依次为热封层、粘合层、油墨层和承印层；
    优选的，所述热封层为聚乙烯层或流延聚丙烯层；
    所述承印层为聚对苯二甲酸乙二醇酯薄膜层和/或聚酰胺层。
  7. 根据权利要求6所述的除湿袋，其特征在于，所述粘合层的厚度为1-3μm；
    所述油墨层的厚度小于3μm；
    所述热封层的厚度为30-150μm；
    所述承印层的厚度为12-50μm。
  8. 根据权利要求1-3任一项所述的除湿袋，其特征在于，所述防潮层上设置易拉结构。
  9. 一种除湿袋的制备方法，其特征在于，包括如下步骤：
    将防潮层与第一侧片和第二侧片热封，得所述除湿袋，其中，所述侧片由透气膜和/或复合膜组成，至少一个侧片的全部或部分为透气膜；所述防潮层位于所述透气膜的外侧。
  10. 根据权利要求9所述的除湿袋的制备方法，其特征在于，还包括底片，将防潮层与底片、第一侧片和第二侧片热封，得所述除湿袋。
  11. 根据权利要求9或10所述的除湿袋的制备方法，其特征在于，所述热封温度为130-220℃，时间为0.5-1s。
  12. 根据权利要求9-11任一项所述的除湿袋的制备方法，其特征在于，热封之前还包括在所述防潮层上涂布热封胶的步骤；
    其中，所述涂布热封胶的速度≤200m/min；
    涂布热封胶时，一段烘道的烘干温度为70-90℃，二段烘道的烘干温度为80-120℃，三段烘道的烘干温度为90-150℃；
    烘干后热封胶的涂布量为3-6g/m 2。
  13. 根据权利要求10或11所述的除湿袋的制备方法，其特征在于，所述防潮层由内到外依次为增强层和阻隔层；所述复合膜由内到外依次为热封层、粘合层、油墨层和承印层；
    还包括在所述阻隔层和/或所述承印层印刷油墨图案的步骤，其中，印刷的速度为100-300m/min，烘干温度为40-80℃。
  14. 根据权利要求13所述的除湿袋的制备方法，其特征在于，所述防潮层的制备步骤为，将印刷油墨图案后的阻隔层与增强层复合、熟化得防潮层；
    所述复合层的制备方法为，将印刷烘干后的承印层与粘合层和热封层复合、熟化得复合层。
  15. 根据权利要求14所述的除湿袋的制备方法，其特征在于，所述复合的速度≤200m/min；
    复合时，一段烘干的温度为50-60℃，二段烘干的温度为65-85℃，三段烘干的温度为75-90℃，贴合温度为50-70℃；复合完成后，在40-50℃熟化，熟化时间≥48h。
PCT/CN2020/115569 2020-06-03 2020-09-16 一种除湿袋及其制备方法 WO2021243883A1 (zh)

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