CN213108479U - Moisture permeable packing material for packing water aqua - Google Patents
Moisture permeable packing material for packing water aqua Download PDFInfo
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- CN213108479U CN213108479U CN202021803291.5U CN202021803291U CN213108479U CN 213108479 U CN213108479 U CN 213108479U CN 202021803291 U CN202021803291 U CN 202021803291U CN 213108479 U CN213108479 U CN 213108479U
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Abstract
The utility model discloses an aqueous agent packing is with penetrating wet wrapping material relates to packaging film technical field, include: the film comprises a straight hole PET film layer, a breathable PE film layer, a waterproof nylon paper layer and a straight hole PE film layer; the breathable PE film layer is pasted between the straight hole PET film layer and the waterproof nylon paper layer, the straight hole PE film layer is pasted below the waterproof nylon paper layer, or the waterproof nylon paper layer is pasted between the straight hole PET film layer and the breathable PE film layer; the breathable PE film layer is attached between the waterproof nylon paper layer and the straight-hole PE film layer. The utility model provides an aqueous agent packing is with penetrating wet wrapping material, moisture permeability is in 100 to 1000 grams per square meter 24h (RH ═ 90%) stable adjustable, and the involution intensity is 35-47 ox/15 millimeters after the banding fuses, and horizontal tear strength 15 ox, vertical tear strength 17 ox have the involution intensity height, easily involution, and is tear-resistant, and banding and surface do not have liquid to ooze, advantage such as to food pollution-free.
Description
Technical Field
The utility model belongs to the technical field of the packaging film, concretely relates to water agent packing for packing pure water or aqueous solution is with penetrating wet wrapping material.
Background
During the storage and transportation of foods with high water content such as fruits, vegetables, areca nuts and the like, the moisture in the foods is lost due to the change of temperature and humidity, so that the taste of the foods is influenced. If the humidity of the storage environment is controlled within a certain range, the loss of water in the food can be effectively prevented, and the taste of the food is prevented from being poor.
The method in the prior art is to seal the super absorbent resin and water with a packaging film to prepare a moisturizing bag, and then seal the moisturizing bag and food in a food package. The packaging film structure that current bag of moisturizing used does: straight hole PET (polyethyleneterephthalate)/nylon paper/straight hole PE (Polyethylene), or straight hole PET/nylon paper/breathable PE. The structure of the straight-hole PET/Nike paper/breathable PE has large moisture permeability, the breathable PE is used as a heat sealing layer, the edge sealing fusion sealing strength is 5-7N/15 mm, the edge sealing is extremely easy to melt or is infirm to seal, liquid water or colloid high-molecular water-absorbing resin seeps at the edge sealing position, the food is easy to pollute, and in addition, the moisture is released too fast, so that the effect of continuously moisturizing the food cannot be achieved. The structural edge sealing, fusing and sealing strength of the straight-hole PET/Niccher paper/straight-hole PE is 35-47 Nm/15 mm, and the sealing effect is good. However, the moisture permeability of the structure is too large, the moisture release speed cannot be controlled, and liquid water and colloidal polymer resin seep out from the surface of the moisture-keeping bag, so that the food is easily polluted.
SUMMERY OF THE UTILITY MODEL
The utility model provides a water agent packing is with penetrating wet wrapping material has solved above technical problem.
The utility model provides a water agent packing is with penetrating wet wrapping material, include: the film comprises a straight hole PET film layer, a breathable PE film layer, a waterproof nylon paper layer and a straight hole PE film layer;
the breathable PE film layer is attached between the straight hole PET film layer and the waterproof nylon paper layer, and the straight hole PE film layer is attached below the waterproof nylon paper layer.
Optionally, a straight hole of the PET film layer is formed on the straight hole PET film layer; the straight hole PE film layer is provided with a PE film layer straight hole;
the waterproof nylon paper layer comprises: a nylon paper layer and a water-blocking glue layer; the water-blocking adhesive layer is attached to the upper surface and/or the lower surface of the nylon paper layer.
Optionally, the aperture of the straight through hole of the PET film layer is 0.38-0.45 mm, and the pitch between any two adjacent straight through holes of the PET film layer is 1-2 mm; the aperture of the straight through hole of the PE film layer is 0.38-0.45 mm, and the pitch between any two adjacent straight through holes of the PE film layer is 1-5 mm.
Optionally, still include between straight hole PET rete and the ventilative PE rete: a first glue layer; still include between ventilative PE rete and the waterproof nylon paper layer: a second adhesive layer; still include between waterproof nylon paper layer and the straight hole PE rete: and a third adhesive layer.
Optionally, a printing layer is arranged on the bottom layer of the straight hole PET film layer; the printing layer is attached to the breathable PE film layer.
The utility model also provides a moisture permeable packing material for water agent packaging, include: the film comprises a straight hole PET film layer, a breathable PE film layer, a waterproof nylon paper layer and a straight hole PE film layer;
the waterproof nylon paper layer is pasted and covered between the straight hole PET film layer and the breathable PE film layer; the breathable PE film layer is attached between the waterproof nylon paper layer and the straight-hole PE film layer.
Optionally, a straight hole of the PET film layer is formed on the straight hole PET film layer; the straight hole PE film layer is provided with a PE film layer straight hole;
the waterproof nylon paper layer comprises: a nylon paper layer and a water-blocking glue layer; the water-blocking adhesive layer is attached to the upper surface and/or the lower surface of the nylon paper layer.
Optionally, the aperture of the straight through hole of the PET film layer is 0.38-0.45 mm, and the pitch between any two adjacent straight through holes of the PET film layer is 1-2 mm; the aperture of the straight through hole of the PE film layer is 0.38-0.45 mm, and the pitch between any two adjacent straight through holes of the PE film layer is 1-5 mm.
Optionally, still include between straight hole PET rete and the waterproof nylon paper layer: a fourth adhesive layer; still include between waterproof nylon paper layer and the ventilative PE rete: a fifth glue layer; still include between ventilative PE rete and the straight hole PE rete: and a sixth glue layer.
Optionally, a printing layer is arranged on the bottom layer of the straight hole PET film layer; the printing layer is attached on the waterproof nylon paper layer.
The utility model has the advantages that: the utility model provides a water aqua packing is with penetrating wet wrapping material, specifically be used for packing the moisture permeability packaging material of pure water or aqueous solution, moisture permeability is at 100 to 1000 grams per square meter 24h (RH (Relative Humidity, Humidity temperature Relative degree) ═ 90%) stable adjustable, the banding fuses back involution intensity and is 35-47 ox/15 millimeter, horizontal tear strength 15 ox, vertical tear strength 17 ox, it is high to have involution intensity, easily the involution, tear-resistant, banding and surperficial no liquid ooze, advantage such as to food pollution-free.
Drawings
Fig. 1 is a structural diagram of a moisture permeable packaging material for aqueous solution packaging provided in embodiment 2 of the present invention;
fig. 2 is a structural view of a moisture permeable packaging material for aqueous solution packaging according to embodiment 3 of the present invention;
fig. 3 is a structural view of a moisture permeable packaging material for aqueous solution packaging according to embodiment 4 of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
The test methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are conventionally obtained commercially or prepared by conventional methods.
In the utility model, the pitch refers to the distance between the centers of two holes; "Aperture" refers to the diameter of a circular hole; the PET film (or PET film) is a poly-p-phthalic plastic film. The breathable PE film is a breathable plastic film obtained by mixing polyethylene and nano calcium carbonate and stretching the mixture transversely and longitudinally. Straight hole PE films are polyethylene films with straight through holes. The nylon paper is PET hot-pressed polyester non-woven fabric.
Example 1
The embodiment provides a moisture permeable packing material for water aqua packaging, which is structurally arranged from outside to inside at one time: a straight hole PET film layer, a breathable PE film layer, a waterproof nylon paper layer, a straight hole PE film layer,
in the embodiment, the straight hole PET film layer is provided with a straight hole of the PET film layer; the straight hole PE film layer is provided with a PE film layer straight hole;
the waterproof nylon paper layer comprises: a nylon paper layer and a water-blocking glue layer; the water-blocking glue layer is stuck on the upper surface and/or the lower surface of the nylon paper layer.
Furthermore, the aperture of the straight through holes of the PET film layer is 0.38-0.45 mm, and the pitch between any two adjacent straight through holes of the PET film layer is 1-2 mm; the aperture of the straight through hole of the PE film layer is 0.38-0.45 mm, and the pitch between any two adjacent straight through holes of the PE film layer is 1-5 mm.
Further, still include between straight hole PET rete and the ventilative PE rete: a first glue layer; still include between ventilative PE rete and the waterproof damping can ply: a second adhesive layer; still include between waterproof nylon paper layer and the straight hole PE rete: and a third adhesive layer.
Preferably, the first adhesive layer, the second adhesive layer and the third adhesive layer are single-component polyurethane adhesive layers.
Further, a printing layer is arranged on the bottom layer of the straight hole PET film layer; the printing layer is pasted on the breathable PE film layer.
The embodiment also provides a moisture permeable packing material for aqueous agent packaging, and the preparation method comprises the following steps:
s1: preparing a straight-hole PET film layer:
the method comprises the steps of adopting a PET film as a surface high-temperature layer and a printing layer, enabling the thickness of the PET film layer to be 10-14 microns, adopting packaging film punching equipment to punch straight through holes in the PET film, enabling the hole diameter to be 0.38-0.45 mm, enabling the hole distance between any two adjacent straight through holes in the PET film layer to be 1-2 mm, enabling the air permeability to be 2-10 seconds (100 ml gas passing time), obtaining the straight through holes after detection is qualified, and rolling up for later use.
S2: preparing a waterproof nylon paper layer:
selecting materials as follows:
nicote paper: commercially available products are used, having a thickness of 30-50 microns and a weight of 15-30 grams per square meter.
Water-blocking glue: the water-resistant adhesive is prepared by mixing the single-component water-based polyurethane adhesive and an acrylate cationic oil-resistant waterproof agent. The mixing proportion is single-component water-based polyurethane adhesive: 20-25 parts of acrylate cationic oil-proof and water-proof agent: 0.1, mixing the two uniformly and then using.
The method for preparing the waterproof nylon paper layer comprises the following steps: and (3) uniformly coating the water-blocking glue on one surface or two surfaces of the nylon paper by adopting a solvent-free dry compounding machine, finishing gluing, drying to obtain the waterproof nylon paper layer, testing the air permeability for 1-500S, and rolling up for later use.
In the embodiment, after the nikker paper is treated by the method, the liquid water can be reduced to pass through, the required sizing amount during the next compounding can be reduced, and the influence of sizing on moisture permeability is reduced.
S3, preparing a straight-hole PE film layer:
and step S31, adopting a three-layer co-extrusion up-blowing method, wherein the blown PE film is used as a heat sealing layer.
Outer layer: basf chemical 2045PE particles 60%: 2426HPE particle 40%
Middle layer: basf chemistry 1520PE particles 60%: 2426HPE particle 40%
Inner layer: basf chemistry 1520PE particles 40%: 60 percent of Dow EVA particles
And a three-layer co-extrusion upper traction rotary film blowing machine is adopted, particles are respectively added into the three groups of main machines according to the proportion, and the setting corresponds to the outer layer 165 and 175 ℃ of the main machine group, the middle layer 165 and 175 ℃ and the outer layer 160 and 170 ℃. After the three groups of main machines are heated to a set temperature, the three-layer co-extrusion die head opening reaches 1: after the blow-up ratio of 3 proportions, the longitudinal direction and the transverse direction are uniformly stretched, and the material is cooled and formed by a machine cooling system and then is rolled for standby. The thickness of the blown PE film is 20-30 microns, the thickness is uniform, the blown PE film is used on a packaging machine, the machine speed is 100-.
Step S32, perforating PE film
And (4) pricking a straight hole of the PE film layer on the PE film blown in the step S31 by using a packaging film pricking device to obtain the straight hole PE film layer, wherein the hole diameter of the straight hole of the PE film layer is 0.38-0.45 mm, the hole distance between any two adjacent straight holes of the PE film layer is 1-5 mm, the air permeability is 2-10 seconds (100 ml gas passing time), and the PE film layer is rolled for later use after being detected to be qualified.
S4: moisture permeable packing material for composite preparation of aqueous agent package
Step S41, compounding the waterproof nylon paper layer and the straight-hole PE film layer to obtain the nylon paper/straight-hole PE composite film
And (4) arranging the waterproof nylon paper layer obtained in the step (S2) into a dry-type compounding machine, and adopting a 130-mesh roller to dry glue on one surface of the waterproof nylon paper layer with the water-blocking glue, so that the waterproof nylon paper layer is compounded with the straight-hole PE film layer obtained in the step (S3).
The solvent-free dry compounding machine is provided with a rubber mixing device at 80-100 ℃, a sizing roller at 80-100 ℃, a vehicle speed of 150- & lt 300 & gt/min, a sizing amount of 2-4 g/square meter, and curing for 24 hours at 50 ℃ after compounding. The permeability of the Nike paper/straight hole PE composite membrane is 100-500 seconds (100 ml gas passing time), and the membrane is reserved after passing detection.
S42, compounding the Nike paper/straight hole PE composite film and the breathable PE film layer to obtain the breathable PE/Nike paper/straight hole PE composite film
The permeable PE film selected in the example is a commercial product, the thickness is 20-30 microns, and the air permeability is 100-400 seconds (100 ml gas passing time).
And (4) arranging the nylon paper/straight-hole PE composite film obtained in the step (S41) into a solvent-free compounding machine, and coating the nylon paper side of the nylon paper/straight-hole PE composite film with single-component polyurethane glue by using a solvent-free compounding machine to compound with the breathable PE film.
The solvent-free compound machine is provided with a rubber mixing device at 80-100 ℃, a sizing roller at 80-100 ℃, a vehicle speed of 150- & lt 300 & gt/min, a sizing amount of 2-4 g/square meter, and curing for 24 hours at 40-70 ℃ after compounding. The air permeability of the obtained PE/Nike paper/straight-hole PE composite membrane is 600-1000 seconds (100 ml gas passing time), and the PE/Nike paper/straight-hole PE composite membrane is reserved after passing detection.
S43, compounding the straight-hole PET film layer with the breathable PE/Nike paper/straight-hole PE composite film
And (4) arranging the straight-hole PET film layer obtained in the step (S1) and the air-permeable PE/nylon paper/straight-hole PE composite film obtained in the step (S4) into a dry compounding machine, coating one surface of the straight-hole PET film printed with single-component polyurethane adhesive by using the compounding machine, and compounding the one surface of the straight-hole PET film with the air-permeable PE film of the air-permeable PE/nylon paper/straight-hole PE composite film to obtain the moisture-permeable packing material for water aqua packaging. The dry compounding machine is provided with 130 mesh rollers, a rubber mixing device is 80-100 ℃, a sizing roller is 80-100 ℃, the speed is 150- & lt 300 & gt/min, the sizing amount is 2-4 g/square meter, and after compounding, curing is carried out for 24 hours at the temperature of 50 ℃. The obtained PET/breathable PE/nylon paper/straight-hole PE composite membrane has the air permeability of 800-3000 seconds (100 ml of gas passing time), the moisture permeability of 100-1000 g/square meter 24h (RH is 90 percent), and the PET/breathable PE/nylon paper/straight-hole PE composite membrane is detected to be qualified as a moisture permeable packing material for water aqua packaging.
The utility model has the advantages that: the utility model provides an aqueous agent packing is with penetrating wet wrapping material, moisture permeability is in 100 to 1000 g/square meter 24h (RH ═ 90%) stable adjustable, and the involution intensity is 35-47 ox/15 millimeters after the banding fuses, and horizontal tear strength 15 ox, vertical tear strength 17 ox have the involution intensity height, easily involution, and is tear-resistant, and banding and surface do not have liquid to ooze, advantage such as to food pollution-free.
Example 2
This embodiment provides a moisture permeable packing material for aqueous solution package, as shown in fig. 1, the structure of which is once set from outside to inside as follows: the anti-corrosion coating comprises, by weight, 1-1 parts of a straight-hole PET film layer, 1-2 parts of a first single-component polyurethane adhesive layer, 1-3 parts of a breathable PE film layer, 1-4 parts of a second single-component polyurethane adhesive layer, 1-5 parts of a nylon paper layer, 1-6 parts of a water-blocking adhesive layer, 1-7 parts of a third single-component polyurethane adhesive layer and 1-8 parts of a straight-hole PE film layer. The preparation method comprises the following steps:
s1: preparing a straight-hole PET film layer 1-1:
the PET film is used as a surface layer high-temperature layer and a printing layer, the thickness of the PET film layer is 12 micrometers, a straight-through hole of the PET film layer is punched on the PET film by a packaging film punching device, the aperture is 0.38 millimeter, the hole distance between any two adjacent straight-through holes of the PET film layer is 1 millimeter, the air permeability is 2 seconds (100 milliliter of gas passing time), and after the detection is qualified, the straight-through hole PET film layer 1-1 is obtained and rolled up for standby.
S2: carrying out waterproof treatment on the nylon paper layer:
selecting materials as follows:
nicote paper: commercially available, 45 micron thick and 20 grams per square meter weight were used.
Water-blocking glue: the water-resistant adhesive is prepared by mixing the single-component water-based polyurethane adhesive and an acrylate cationic oil-resistant waterproof agent. The mixing proportion is single-component water-based polyurethane adhesive: 20 percent of acrylate cationic oil-proof and water-proof agent: 0.1, mixing the two uniformly and then using.
The waterproof treatment method of the Nicote paper comprises the following steps: and (3) uniformly coating the water-blocking glue on one surface of the nylon paper by adopting a solvent-free dry compounding machine, finishing gluing, drying to obtain a waterproof nylon paper layer comprising nylon paper layers 1-5 and water-blocking glue layers 1-6, testing the air permeability for 5S, and rolling for later use.
After the nico paper is treated by the method, the liquid water can be reduced, the needed sizing amount during the next compounding can be reduced, and the influence of sizing on the moisture permeability is reduced.
S3, preparing a straight-hole PE film layer 1-8:
and step S31, adopting a three-layer co-extrusion up-blowing method, wherein the blown PE film is used as a heat sealing layer.
Outer layer: basf chemical 2045PE particles 60%: 2426HPE particle 40%
Middle layer: basf chemistry 1520PE particles 60%: 2426HPE particle 40%
Inner layer: basf chemistry 1520PE particles 40%: 60 percent of Dow EVA particles
And a three-layer co-extrusion upper traction rotary film blowing machine is adopted, particles are respectively added into the three groups of main machines according to the proportion, and the setting corresponds to the outer layer 165 and 175 ℃ of the main machine group, the middle layer 165 and 175 ℃ and the outer layer 160 and 170 ℃. After the three groups of main machines are heated to a set temperature, the three-layer co-extrusion die head opening reaches 1: after the blow-up ratio of 3 proportions, the longitudinal direction and the transverse direction are uniformly stretched, and the material is cooled and formed by a machine cooling system and then is rolled for standby. The thickness of the blown PE film is 25 mu m, the thickness is uniform, and the sealing strength of the edge sealing after hot-press fusion reaches 47N/15 MM.
Step S32, perforating the PE film:
and (3) pricking a straight through hole of the PE film layer on the PE film blown in the previous step by using a packaging film pricking device to obtain 1-8 straight hole PE film layers, wherein the hole diameter of the straight through hole of the PE film layer is 0.38 mm, the hole distance between any two adjacent straight through holes of the PE film layer is 1 mm, the air permeability is 5 seconds (100 ml gas passing time), and the PE film is rolled for later use after the PE film is qualified.
S4: moisture permeable packing material for composite preparation of aqueous agent package
Step S41, compounding the waterproof nylon paper layer with the straight-hole PE film layer 1-8 to obtain the nylon paper/straight-hole PE composite film
The waterproof nylon paper layer obtained in step S2 of this embodiment is placed in a dry laminator, and the one side of the waterproof nylon paper layer with the water-blocking glue is coated with a single component polyurethane glue by a mesh roller of the dry laminator 130 to be compounded with the straight hole PE film layer obtained in step S3 of this embodiment.
The solvent-free dry compound machine is provided with a rubber mixing device of 95 ℃, a gluing roller of 85 ℃, a vehicle speed of 200 m/min, a gluing amount of 2.5 g/square meter, and is cured for 24 hours at the temperature of 40-70 ℃ after compounding. The obtained nylon paper/straight-hole PE composite membrane has the air permeability of 200 seconds (100 ml of gas passing time), and is detected to be qualified and reserved.
S42, compounding the Nike paper/straight hole PE composite film and the breathable PE film layer to obtain the breathable PE/Nike paper/straight hole PE composite film
The breathable PE film selected was a commercial product having a thickness of 25 microns and a gas permeability of 300 seconds (100 ml gas transit time).
And (4) arranging the nylon paper/straight-hole PE composite film obtained in the step (S41) into a solvent-free compounding machine, and compounding the nylon paper side of the nylon paper/straight-hole PE composite film with the breathable PE film by using the single-component polyurethane adhesive on the solvent-free compounding machine.
The solvent-free compound machine is provided with a rubber mixing device at 95 ℃, a gluing roller at 85 ℃, a vehicle speed of 200 m/min, a gluing amount of 2.5 g/square meter, and curing for 24 hours at 40-70 ℃ after compounding. The air permeability of the obtained air permeable PE/Nike paper/straight hole PE composite membrane is 800 seconds (100 ml gas passing time), and the obtained membrane is detected to be qualified and is reserved.
S43, compounding the straight-hole PET film layer 1-1 with the breathable PE/Nicote paper/straight-hole PE composite film
The straight hole PET film layer 1-1 obtained in step S1 and the air-permeable PE/nico paper/straight hole PE composite film obtained in step S4 of this example were placed in a dry laminator, and a one-pack polyurethane adhesive was coated on the printed side of the straight hole PET film layer by the laminator to be combined with the air-permeable PE film side of the air-permeable PE/nico paper/straight hole PE composite film. The dry compound machine is provided with a rubber mixer 95 ℃, a gluing roller 85 ℃, a vehicle speed of 200 m/min, a gluing amount of 3 g/square meter, and is cured for 24 hours at 50 ℃ after compounding to obtain the moisture permeable packing material for the water aqua packaging (PET/breathable PE/Nikepaper/straight-hole PE composite membrane), the air permeability is 1000 seconds (100 ml of gas passing time), the moisture permeability is 310 g/square meter 24 hours (RH is 90%), the sealing strength is 47N/15mm after edge sealing and fusion, the transverse tearing strength is 15N, the longitudinal tearing strength is 17N, and the dry compound machine has the advantages of high sealing strength, easy sealing, tearing resistance, no liquid seepage on the edge sealing and the surface, and no pollution to food.
Example 3
This embodiment provides a moisture permeable packing material for aqueous solution package, as shown in fig. 2, the structure of which is once set from outside to inside as follows: 2-1 parts of a straight-hole PET film layer, 2-2 parts of a first single-component polyurethane adhesive layer, 2-3 parts of a breathable PE film layer, 2-4 parts of a second single-component polyurethane adhesive layer, 2-5 parts of a first water-blocking adhesive layer, 2-6 parts of a nylon paper layer, 2-7 parts of a second water-blocking adhesive layer, 2-8 parts of a third single-component polyurethane adhesive layer and 2-9 parts of a straight-hole PE film layer.
The preparation method comprises the following steps:
the first difference from example 2 is that in step S1, through holes are punched in the PET film, the hole diameter is 0.38 mm, the pitch between any two adjacent through holes is 2 mm, the air permeability is 80 seconds (100 ml gas passing time), and the PET film is rolled up for use after passing the test.
A second difference from example 2 is that: step S2, in the waterproof treatment of the nylon paper, a solvent-free compound machine is adopted to uniformly coat the water-blocking glue on one surface of the nylon paper, the glue application amount is 3 g/sq m, the glue application is completed, the water-blocking glue is coated on the other surface of the nylon paper according to the same method after drying, the glue application amount is 3 g/sq m, the drying is carried out, finally, the waterproof nylon paper layer with the water-blocking glue coated on the two surfaces is obtained, the tested air permeability is 300S, and the waterproof nylon paper layer is rolled up for standby.
The third difference from the example 2 is that a hole is punched in the PE film, a straight hole of the PE film layer is punched on the PE film blown in the previous step by using a packaging film punching device, so that a straight hole PE film layer 2-9 is obtained, the hole diameter is 0.38 mm, the hole distance between any two adjacent straight holes of the PE film layer is 2 mm, the air permeability is 50 seconds (100 ml gas passing time), and the PE film layer is rolled up for use after passing the detection.
The final composition of the straight-hole PET film layer 2-1 and the air-permeable PE/nico paper/straight-hole PE composite film was the same as in example 2, and the moisture-permeable wrapping material for aqueous solution packaging (PET/air-permeable PE/nico paper/straight-hole PE composite film) had a gas permeability of 2000 seconds (100 ml gas passage time), a moisture permeability of 120 g/m 24h (RH ═ 90%), a sealing strength of 41 n/15mm after edge sealing and fusion, a transverse tear strength of 15.5 n, and a longitudinal tear strength of 17 n. From the test data, the obtained composite membrane has reduced moisture permeability and reduced air permeability. Therefore, the water-blocking glue amount is increased on the nylon paper, the hole distance between the straight hole PET film layer and the straight hole PE film layer is increased, and the ventilation amount and the moisture permeation amount can be reduced.
Example 4
The embodiment provides a moisture permeable packing material for water aqua packaging, which is structurally arranged from outside to inside at one time: the waterproof nylon paper comprises a straight hole PET film layer, a waterproof nylon paper layer, a breathable PE film layer and a straight hole PE film layer;
the waterproof nylon paper layer is pasted between the straight hole PET film layer and the breathable PE film layer; the breathable PE film layer is attached between the waterproof nylon paper layer and the straight-hole PE film layer.
Further, a straight hole of the PET film layer is arranged on the straight hole PET film layer; the straight hole PE film layer is provided with a PE film layer straight hole;
the waterproof nylon paper layer comprises: a nylon paper layer and a water-blocking glue layer; the water-blocking glue layer is stuck on the upper surface and/or the lower surface of the nylon paper layer.
Furthermore, the aperture of the straight through holes of the PET film layer is 0.38-0.45 mm, and the pitch between any two adjacent straight through holes of the PET film layer is 1-2 mm; the aperture of the straight through hole of the PE film layer is 0.38-0.45 mm, and the pitch between any two adjacent straight through holes of the PE film layer is 1-5 mm.
Specifically, still include between straight hole PET rete and the waterproof nylon paper layer: a fourth adhesive layer; still include between waterproof nylon paper layer and the ventilative PE rete: a fifth glue layer; still include between ventilative PE rete and the straight hole PE rete: and a sixth glue layer.
Preferably, the fourth adhesive layer, the fifth adhesive layer and the sixth adhesive layer are single-component polyurethane adhesive layers.
In the embodiment, the printing layer is arranged on the bottom layer of the straight hole PET film layer; the printing layer is adhered on the waterproof nylon paper layer.
In this embodiment, a moisture permeable packing material for aqueous solution packaging and a preparation method thereof are further specifically provided, and as shown in fig. 3, a moisture permeable packing material for aqueous solution packaging includes: 3-1 of a straight hole PET film layer, 3-2 of a fourth single-component polyurethane adhesive layer, 3-3 of a nylon paper layer, 3-4 of a water-blocking adhesive layer, 3-5 of a fifth single-component polyurethane adhesive layer, 3-6 of a breathable PE film layer, 3-7 of a sixth single-component polyurethane adhesive layer and 3-8 of a straight hole PE film layer;
compared with the embodiment 2, the preparation method mainly has the difference that the moisture permeable packing material for the aqueous packaging is prepared, and the compounding sequence is changed.
The first difference is that: and (3) compounding the waterproof nylon paper layer with the breathable PE film layer 3-6 to obtain the nylon paper/breathable PE composite film. The waterproof nylon paper layer obtained in step S2 in example 2 was placed in a solvent-free dry laminator, and the side of the waterproof nylon paper layer having the water-blocking adhesive was laminated with the breathable PE film layer by using the single-component polyurethane adhesive of the dry laminator. Thus obtaining the nylon paper/breathable PE composite film.
The second difference is that: the nylon paper/breathable PE composite film is compounded with the straight hole PE film layer 3-8 to obtain the nylon paper/breathable PE/straight hole PE composite film
And arranging the nylon paper/breathable PE composite film obtained in the previous step into a solvent-free compounding machine, and compounding the breathable PE film layer side of the nylon paper/breathable PE composite film with the straight-hole PE film layer by utilizing the single-component polyurethane adhesive on the solvent-free compounding machine. Compounding conditions and sizing amounts were the same as in example 2. The air permeability of the obtained Nike paper/air permeable PE/straight hole PE composite membrane is 2000 seconds (100 ml gas passing time), and the obtained Nike paper/air permeable PE/straight hole PE composite membrane is detected to be qualified and reserved.
The third difference is that: the straight hole PET film layer 3-1 is compounded with the Nicotiana paper/breathable PE/straight hole PE composite film. The straight hole PET film layer obtained in step S1 in example 2 and the nylon paper/air permeable PE/straight hole PE composite film obtained in the previous step were placed in a dry laminator, and a one-component polyurethane adhesive was coated on the printed side of the straight hole PET film layer 3-1 by a laminator to be composited with the nylon paper side of the nylon paper/air permeable PE/straight hole PE composite film, under the same compositing conditions as in example 2. And obtaining the moisture permeable packaging material (straight hole PET/nylon paper/breathable PE/straight hole PE composite film) for packaging the aqueous solution, wherein the air permeability is 5000 seconds (100 ml of air passing time), the moisture permeability is 10 g/square meter by 24h (RH is 90%), the sealing strength is 47N/15mm after edge sealing and fusion, the transverse tearing strength is 15N, and the longitudinal tearing strength is 17N. Compared with the embodiment 2, the embodiment 4 changes the compounding sequence, the gluing of the air-permeable PE film layer is compounded with the straight-hole PE film layer, and the glue blocks the holes of the straight-hole PE film layer and the air-permeable PE film layer to a certain extent through hot pressing, so that the air permeability and the moisture permeability are obviously reduced.
To the utility model discloses embodiment 2 to embodiment 4 make the aqueous agent packaging material carry out performance test, the test result is shown as table 1:
1. air permeability is measured according to JISP 8117-2009.
2. The moisture permeability is determined according to the GBT 1037-.
3. Sealing strength test method, and the sealing edge pulling force is measured according to the GB/T1040-1992 standard.
4. Tear resistance test method, transverse and longitudinal tear strength was determined according to GB/T1130-1991.
TABLE 1
The above description is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A moisture permeable packing material for packing water aqua is characterized by comprising: the film comprises a straight hole PET film layer, a breathable PE film layer, a waterproof nylon paper layer and a straight hole PE film layer;
the breathable PE film layer is attached between the straight hole PET film layer and the waterproof nylon paper layer, and the straight hole PE film layer is attached below the waterproof nylon paper layer.
2. The moisture permeable packing material for aqueous agent packaging according to claim 1, wherein the straight hole PET film layer is provided with a straight hole of the PET film layer; the straight hole PE film layer is provided with a PE film layer straight hole;
the waterproof nylon paper layer comprises: a nylon paper layer and a water-blocking glue layer; the water-blocking adhesive layer is attached to the upper surface and/or the lower surface of the nylon paper layer.
3. The moisture permeable packing material for aqueous agent packaging according to claim 2, wherein the through holes of the PET film layer have a hole diameter of 0.38-0.45 mm, and the pitch between any two adjacent through holes of the PET film layer is 1-2 mm; the aperture of the straight through hole of the PE film layer is 0.38-0.45 mm, and the pitch between any two adjacent straight through holes of the PE film layer is 1-5 mm.
4. The moisture permeable packing material for aqueous agent packaging according to claim 1, further comprising, between the straight hole PET film layer and the air permeable PE film layer: a first glue layer; still include between ventilative PE rete and the waterproof nylon paper layer: a second adhesive layer; still include between waterproof nylon paper layer and the straight hole PE rete: and a third adhesive layer.
5. The moisture permeable packing material for the aqueous agent package according to claim 1, wherein a printing layer is provided on the bottom layer of the straight hole PET film layer; the printing layer is attached to the breathable PE film layer.
6. A moisture permeable packing material for packing water aqua is characterized by comprising: the film comprises a straight hole PET film layer, a breathable PE film layer, a waterproof nylon paper layer and a straight hole PE film layer;
the waterproof nylon paper layer is pasted and covered between the straight hole PET film layer and the breathable PE film layer; the breathable PE film layer is attached between the waterproof nylon paper layer and the straight-hole PE film layer.
7. The moisture permeable packing material for aqueous agent packaging according to claim 6, wherein the straight hole PET film layer is provided with a straight hole of the PET film layer; the straight hole PE film layer is provided with a PE film layer straight hole;
the waterproof nylon paper layer comprises: a nylon paper layer and a water-blocking glue layer; the water-blocking adhesive layer is attached to the upper surface and/or the lower surface of the nylon paper layer.
8. The moisture permeable packing material for aqueous agent packaging according to claim 7, wherein the through holes of the PET film layer have a hole diameter of 0.38-0.45 mm, and the pitch between any two adjacent through holes of the PET film layer is 1-2 mm; the aperture of the straight through hole of the PE film layer is 0.38-0.45 mm, and the pitch between any two adjacent straight through holes of the PE film layer is 1-5 mm.
9. The moisture permeable packaging material for aqueous agent packaging according to claim 7, further comprising, between the straight hole PET film layer and the waterproof nylon paper layer: a fourth adhesive layer; still include between waterproof nylon paper layer and the ventilative PE rete: a fifth glue layer; still include between ventilative PE rete and the straight hole PE rete: and a sixth glue layer.
10. The moisture permeable packing material for aqueous agent packaging according to claim 6, wherein a printing layer is provided on the bottom layer of the straight hole PET film layer; the printing layer is attached on the waterproof nylon paper layer.
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Address after: 211301 Dongba Town Industrial Park, Gaochun County, Nanjing City, Jiangsu Province Patentee after: Nanjing Huafeng wonderful packaging material Co.,Ltd. Address before: 211301 Dongba Town Industrial Park, Gaochun County, Nanjing City, Jiangsu Province Patentee before: Gaochun Huafeng Plastic Co.,Ltd. |