CN114984781B - Composite film for grain storage and packaging and preparation method thereof - Google Patents
Composite film for grain storage and packaging and preparation method thereof Download PDFInfo
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- CN114984781B CN114984781B CN202210489060.9A CN202210489060A CN114984781B CN 114984781 B CN114984781 B CN 114984781B CN 202210489060 A CN202210489060 A CN 202210489060A CN 114984781 B CN114984781 B CN 114984781B
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- 239000002131 composite material Substances 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 51
- 238000003860 storage Methods 0.000 title claims abstract description 35
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 29
- -1 polyethylene Polymers 0.000 claims abstract description 114
- 239000000835 fiber Substances 0.000 claims abstract description 103
- 239000004698 Polyethylene Substances 0.000 claims abstract description 87
- 229920000573 polyethylene Polymers 0.000 claims abstract description 87
- 239000000077 insect repellent Substances 0.000 claims abstract description 58
- 238000002791 soaking Methods 0.000 claims abstract description 30
- 239000004743 Polypropylene Substances 0.000 claims abstract description 27
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 27
- 229920001155 polypropylene Polymers 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 24
- 230000002745 absorbent Effects 0.000 claims abstract description 8
- 239000002250 absorbent Substances 0.000 claims abstract description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 48
- 238000005098 hot rolling Methods 0.000 claims description 46
- LLLVZDVNHNWSDS-UHFFFAOYSA-N 4-methylidene-3,5-dioxabicyclo[5.2.2]undeca-1(9),7,10-triene-2,6-dione Chemical compound C1(C2=CC=C(C(=O)OC(=C)O1)C=C2)=O LLLVZDVNHNWSDS-UHFFFAOYSA-N 0.000 claims description 42
- 238000003825 pressing Methods 0.000 claims description 35
- 239000012528 membrane Substances 0.000 claims description 25
- 239000012752 auxiliary agent Substances 0.000 claims description 24
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 24
- 238000010096 film blowing Methods 0.000 claims description 24
- 238000005303 weighing Methods 0.000 claims description 24
- 238000010521 absorption reaction Methods 0.000 claims description 21
- 238000001035 drying Methods 0.000 claims description 18
- 238000004026 adhesive bonding Methods 0.000 claims description 14
- 238000007664 blowing Methods 0.000 claims description 12
- 238000009960 carding Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 235000002566 Capsicum Nutrition 0.000 claims description 9
- 239000006002 Pepper Substances 0.000 claims description 9
- 241000722363 Piper Species 0.000 claims description 9
- 235000016761 Piper aduncum Nutrition 0.000 claims description 9
- 235000017804 Piper guineense Nutrition 0.000 claims description 9
- 235000008184 Piper nigrum Nutrition 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000011259 mixed solution Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 238000004513 sizing Methods 0.000 claims description 7
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 6
- 235000003092 Artemisia dracunculus Nutrition 0.000 claims description 6
- 240000001851 Artemisia dracunculus Species 0.000 claims description 6
- 235000003261 Artemisia vulgaris Nutrition 0.000 claims description 6
- 240000006891 Artemisia vulgaris Species 0.000 claims description 6
- 235000008495 Chrysanthemum leucanthemum Nutrition 0.000 claims description 6
- 244000035851 Chrysanthemum leucanthemum Species 0.000 claims description 6
- 240000006927 Foeniculum vulgare Species 0.000 claims description 6
- 235000004204 Foeniculum vulgare Nutrition 0.000 claims description 6
- 240000007232 Illicium verum Species 0.000 claims description 6
- 235000008227 Illicium verum Nutrition 0.000 claims description 6
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 6
- 241000124033 Salix Species 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 6
- 238000003851 corona treatment Methods 0.000 claims description 6
- FYIBGDKNYYMMAG-UHFFFAOYSA-N ethane-1,2-diol;terephthalic acid Chemical compound OCCO.OC(=O)C1=CC=C(C(O)=O)C=C1 FYIBGDKNYYMMAG-UHFFFAOYSA-N 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 239000002562 thickening agent Substances 0.000 claims description 6
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 17
- 230000035699 permeability Effects 0.000 abstract description 11
- 239000002994 raw material Substances 0.000 abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 abstract description 7
- 239000001301 oxygen Substances 0.000 abstract description 7
- 231100000252 nontoxic Toxicity 0.000 abstract description 5
- 230000003000 nontoxic effect Effects 0.000 abstract description 5
- 241000411851 herbal medicine Species 0.000 abstract description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 240000004160 Capsicum annuum Species 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/48—Polyesters
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
- A01N25/10—Macromolecular compounds
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
- A01N65/06—Coniferophyta [gymnosperms], e.g. cypress
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
- A01N65/08—Magnoliopsida [dicotyledons]
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
- A01N65/08—Magnoliopsida [dicotyledons]
- A01N65/12—Asteraceae or Compositae [Aster or Sunflower family], e.g. daisy, pyrethrum, artichoke, lettuce, sunflower, wormwood or tarragon
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
- A01N65/08—Magnoliopsida [dicotyledons]
- A01N65/36—Rutaceae [Rue family], e.g. lime, orange, lemon, corktree or pricklyash
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
- A01N65/08—Magnoliopsida [dicotyledons]
- A01N65/38—Solanaceae [Potato family], e.g. nightshade, tomato, tobacco or chilli pepper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Natural Medicines & Medicinal Plants (AREA)
- Plant Pathology (AREA)
- Environmental Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Dentistry (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Microbiology (AREA)
- Mycology (AREA)
- Biotechnology (AREA)
- Botany (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Pest Control & Pesticides (AREA)
- Toxicology (AREA)
- Laminated Bodies (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention discloses a composite film for grain storage and packaging and a preparation method thereof, belonging to the technical field of composite films, wherein the composite film for grain storage and packaging comprises PET non-woven fabrics, a high-strength breathable film, a waterproof film and an insect-repellent film; in the preparation process of the high-strength breathable film, raw materials and proportions of the high-strength breathable film are changed, so that the prepared high-strength breathable film has the effects of high strength and high oxygen permeability, in the preparation process of the waterproof film, the raw materials for preparing the film are polyethylene fibers, polypropylene fibers and super absorbent fibers, moisture in air can be absorbed through the super absorbent fibers, the probability of grain mildew is further reduced, in the preparation process of the insect repellent film, the prepared base film is placed in a soaking processing barrel to be soaked, insect repellent materials in the soaking processing barrel can be soaked into the base film, the insect repellent film has the insect repellent effect, and the materials in the soaking processing barrel are all nontoxic medicinal materials or herbal medicines, so that the insect repellent film can be used safely.
Description
Technical Field
The invention relates to the technical field of composite films, in particular to a composite film for grain storage and packaging and a preparation method thereof.
Background
The method for storing the grains in China is conventional, low-temperature, chemical, underground and pneumatic control storage.
The common conventional storage method is to store grains in a storage bag and a storage bin, but the storage bag in the prior art is formed by weaving single-layer plastic fibers, has single performance, cannot ensure normal storage of grains, and is formed by spunbonding and hot rolling of countless continuous polyester filaments along with the improvement of scientific technology, wherein the PET plastic and PET non-woven fabric synthetic packaging bags are formed by PET plastic, and the PET plastic is nontoxic and odorless and high in transparency, has excellent air resistance, water, oil and peculiar smell performance, and is formed by weaving 100% polyester chips.
The PET synthetic packaging bag in the prior art has the characteristic of good air permeability, but the strength of the PET synthetic packaging bag in the prior art is not high, the packaging task with a large weight cannot be born, and the PET synthetic packaging bag in the prior art can only bear the storage task, cannot achieve the insect-repellent effect, and further is particularly important for the grain storage packaging composite film capable of achieving the insect-repellent effect.
Disclosure of Invention
The invention aims to solve the problems that the packaging composite film in the prior art is low in strength and cannot achieve the insect-repellent effect, and provides a composite film for grain storage packaging and a preparation method thereof.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a composite film for grain storage and package comprises PET non-woven fabric, high strength ventilated membrane, waterproof membrane and insect-repellent membrane.
Preferably, the high strength breathable film comprises the following components in equal parts by mass: 50-60 parts of ethylene terephthalate, 15-20 parts of polyethylene, 10-20 parts of calcium carbonate and 0.01-0.02 part of auxiliary agent, and the preparation steps of the high-strength breathable film are as follows:
a1, taking ethylene terephthalate and polyethylene, and putting the polyethylene into a dryer for drying for 3-5 hours;
a2, placing the dried ethylene terephthalate, polyethylene, calcium carbonate and auxiliary agent into an automatic weighing proportioning machine for weighing proportioning;
a3, starting a vacuum suction pump to inject ethylene terephthalate, polyethylene materials and additives into a processing bin, and starting an extruder;
a4, feeding the base film extruded from the extruder into a film blowing machine, and adjusting the extrusion amount of the extruder and the blowing air quantity of the film blowing machine;
a5, stretching the obtained base film to obtain a stretched base film;
and A6, carrying out corona treatment on the stretched base film to obtain the high-strength breathable film.
Preferably, the waterproof membrane comprises the following components in equal parts by mass: polyethylene fibers, polypropylene fibers, and superabsorbent fibers;
the preparation method of the waterproof film comprises the following steps:
b1, placing polyethylene fibers and polypropylene fibers in a lapping machine for lapping;
b2, spraying the super absorbent fibers on the polyethylene fibers and the polypropylene fibers to obtain a fiber web in the lapping process;
b3, placing the fiber web into a hot rolling mill for preliminary hot rolling to obtain a non-woven fabric;
b4, carding the non-woven fabric obtained by preliminary hot rolling to obtain a waterproof base film;
and B5, taking the waterproof base film obtained after carding, and putting the waterproof base film into a hot rolling mill for secondary hot rolling to obtain the waterproof film.
Preferably, the insect repellent film comprises the following components in equal parts by mass: 50-60 parts of ethylene terephthalate, 15-20 parts of polyethylene, 10-20 parts of calcium carbonate and 0.01-0.02 part of auxiliary agent;
the specific preparation steps of the insect repellent film are as follows:
c1, taking ethylene glycol terephthalate and polyethylene, and putting the polyethylene into a dryer for drying for 2-3 hours;
c2, placing the dried ethylene terephthalate, polyethylene, calcium carbonate and auxiliary agent into an automatic weighing proportioning machine for weighing proportioning;
c3, starting a vacuum suction pump to inject ethylene terephthalate, polyethylene materials and auxiliaries into a processing bin, and starting an extruder;
c4, conveying the base film extruded in the extruder into a soaking processing barrel for soaking for 7-9h;
c5, sending the soaked base film into a dryer for drying for 50-60min;
c6, taking out the dried base film, feeding the base film into a film blowing machine, and adjusting the blowing air quantity of the film blowing machine;
and C7, stretching the obtained base film to obtain the insect-repellent film.
Preferably, the lapping speed of the lapping machine in the step B1 is 40-60m/min.
Preferably, the hot roll temperature in the hot rolling mill of step B3 is 140-145 ℃.
Preferably, in the step B5 of the secondary hot rolling, the pressure between hot rolls in the hot rolling mill is 4-5Mpa.
Preferably, the stretching comprises transverse stretching and longitudinal stretching, and the ratio of transverse stretching to longitudinal stretching is 2:3.
Preferably, the insect-repellent mixed liquid is arranged in the soaking processing barrel, and comprises the following components: 5-8 parts of star anise, 6-7 parts of fennel, 6-8 parts of pepper, 8-10 parts of mugwort leaf, 6-8 parts of rosin, 5-7 parts of willow leaf, 6-8 parts of dried pepper, 5-8 parts of wild chrysanthemum, 8-9 parts of tarragon, 30-40 parts of water and 1-2 parts of thickener.
A preparation method of a composite film for grain storage and packaging comprises the following steps:
s1, sequentially stacking the prepared high-strength breathable film, waterproof film, insect-repellent film and PET non-woven fabric into a pressing machine for preliminary pressing;
s2, taking out the composite base film obtained by preliminary pressing, and putting the composite base film into a gluing machine for gluing;
s3, taking the composite base film subjected to the sizing treatment, and airing for 3-4 hours;
s4, after the airing is finished, putting the mixture into a pressing machine for secondary pressing;
s5, detecting to obtain the composite film.
Compared with the prior art, the invention provides a composite film for grain storage and packaging and a preparation method thereof, and the composite film has the following beneficial effects:
1. in the preparation process of the high-strength breathable film, the raw materials and the proportion of the high-strength breathable film are changed, so that the prepared high-strength breathable film has the effects of high strength and high oxygen permeability, and the high-strength breathable film further improves the oxygen permeability of the high-strength breathable film through the bidirectional stretching of the high-strength breathable film in the preparation process, so that the effect of high air permeability is achieved.
2. In the preparation process of the waterproof membrane, the preparation raw materials of the membrane are changed into polyethylene fibers, polypropylene fibers and high-water-absorption fibers, the high-water-absorption fibers can effectively absorb moisture in air, the probability of mildew caused by the moisture during grain storage is further reduced, and in the preparation process, the high-water-absorption fibers are sprayed onto the fiber webs of the polyethylene fibers and the polypropylene fibers, so that the high-water-absorption fibers are more easily combined with the fiber web, and the water absorption effect of the waterproof membrane is further improved.
3. In the preparation process of the insect-repellent film, the prepared base film is soaked in a soaking processing barrel, so that insect-repellent materials in the soaking processing barrel can be soaked in the base film, the insect-repellent film has an insect-repellent effect, and the materials in the soaking processing barrel are nontoxic medicinal materials or herbal medicines and can be used with confidence.
Detailed Description
Example 1:
a composite film for grain storage and package comprises PET non-woven fabric, high strength ventilated membrane, waterproof membrane and insect-repellent membrane.
The high-strength breathable film comprises the following components in equal parts by mass: 55 parts of ethylene terephthalate, 18 parts of polyethylene, 15 parts of calcium carbonate and 0.01 part of auxiliary agent, and the preparation steps of the high-strength breathable film are as follows:
a1, taking ethylene terephthalate and polyethylene, and putting the polyethylene into a dryer for drying for 4 hours;
a2, placing the dried ethylene terephthalate, polyethylene, calcium carbonate and auxiliary agent into an automatic weighing proportioning machine for weighing proportioning;
a3, starting a vacuum suction pump to inject ethylene terephthalate, polyethylene materials and additives into a processing bin, and starting an extruder;
a4, feeding the base film extruded from the extruder into a film blowing machine, and adjusting the extrusion amount of the extruder and the blowing air quantity of the film blowing machine;
a5, stretching the obtained base film to obtain a stretched base film;
and A6, carrying out corona treatment on the stretched base film to obtain the high-strength breathable film.
The waterproof membrane comprises the following components in equal parts by mass: polyethylene fibers, polypropylene fibers, and superabsorbent fibers;
the preparation method of the waterproof film comprises the following steps:
b1, placing polyethylene fibers and polypropylene fibers in a lapping machine for lapping;
b2, spraying the super absorbent fibers on the polyethylene fibers and the polypropylene fibers to obtain a fiber web in the lapping process;
b3, placing the fiber web into a hot rolling mill for preliminary hot rolling to obtain a non-woven fabric;
b4, carding the non-woven fabric obtained by preliminary hot rolling to obtain a waterproof base film;
and B5, taking the waterproof base film obtained after carding, and putting the waterproof base film into a hot rolling mill for secondary hot rolling to obtain the waterproof film.
The insect repellent film comprises the following components in equal parts by mass: 55 parts of ethylene terephthalate, 18 parts of polyethylene, 15 parts of calcium carbonate and 0.02 part of auxiliary agent;
the specific preparation steps of the insect repellent film are as follows:
c1, taking ethylene glycol terephthalate and polyethylene, and putting the polyethylene into a dryer for drying for 3 hours;
c2, placing the dried ethylene terephthalate, polyethylene, calcium carbonate and auxiliary agent into an automatic weighing proportioning machine for weighing proportioning;
c3, starting a vacuum suction pump to inject ethylene terephthalate, polyethylene materials and auxiliaries into a processing bin, and starting an extruder;
c4, conveying the base film extruded in the extruder into a soaking processing barrel for soaking for 8 hours;
c5, sending the soaked base film into a dryer for drying for 55min;
c6, taking out the dried base film, feeding the base film into a film blowing machine, and adjusting the blowing air quantity of the film blowing machine;
and C7, stretching the obtained base film to obtain the insect-repellent film.
The lapping speed of the lapping machine in the step B1 is 50m/min.
The hot roll temperature in the hot rolling mill of step B3 was 143 ℃.
And B5, during the secondary hot rolling, the pressure between hot rolls in the hot rolling mill is 4Mpa.
Stretching includes transverse stretching and longitudinal stretching, and the ratio of transverse stretching to longitudinal stretching is 2:3.
The soaking processing barrel is internally provided with an insect-repellent mixed solution which comprises the following components: 6 parts of star anise, 6 parts of fennel, 8 parts of pepper, 10 parts of mugwort leaf, 7 parts of rosin, 6 parts of willow leaf, 7 parts of dried chilli, 6 parts of wild chrysanthemum, 8 parts of tarragon, 35 parts of water and 2 parts of thickener.
A preparation method of a composite film for grain storage and packaging comprises the following steps:
s1, sequentially stacking the prepared high-strength breathable film, waterproof film, insect-repellent film and PET non-woven fabric into a pressing machine for preliminary pressing;
s2, taking out the composite base film obtained by preliminary pressing, and putting the composite base film into a gluing machine for gluing;
s3, taking the composite base film subjected to the sizing treatment, and airing for 4 hours;
s4, after the airing is finished, putting the mixture into a pressing machine for secondary pressing;
s5, detecting to obtain the composite film.
In the preparation process of the high-strength breathable film, the raw materials and the proportion of the high-strength breathable film are changed, so that the prepared high-strength breathable film has the effects of high strength and high oxygen permeability, and the high-strength breathable film further improves the oxygen permeability of the high-strength breathable film through the bidirectional stretching of the high-strength breathable film in the preparation process, so that the effect of high air permeability is achieved.
In the preparation process of the waterproof membrane, the preparation raw materials of the membrane are changed into polyethylene fibers, polypropylene fibers and high-water-absorption fibers, the high-water-absorption fibers can effectively absorb moisture in air, the probability of mildew caused by the moisture during grain storage is further reduced, and in the preparation process, the high-water-absorption fibers are sprayed onto the fiber webs of the polyethylene fibers and the polypropylene fibers, so that the high-water-absorption fibers are more easily combined with the fiber web, and the water absorption effect of the waterproof membrane is further improved.
In the preparation process of the insect-repellent film, the prepared base film is soaked in a soaking processing barrel, so that insect-repellent materials in the soaking processing barrel can be soaked in the base film, the insect-repellent film has an insect-repellent effect, and the materials in the soaking processing barrel are nontoxic medicinal materials or herbal medicines and can be used with confidence.
Example 2:
a composite film for grain storage and package comprises PET non-woven fabrics, waterproof film and insect-repellent film.
The waterproof membrane comprises the following components in equal parts by mass: polyethylene fibers, polypropylene fibers, and superabsorbent fibers;
the preparation method of the waterproof film comprises the following steps:
b1, placing polyethylene fibers and polypropylene fibers in a lapping machine for lapping;
b2, spraying the super absorbent fibers on the polyethylene fibers and the polypropylene fibers to obtain a fiber web in the lapping process;
b3, placing the fiber web into a hot rolling mill for preliminary hot rolling to obtain a non-woven fabric;
b4, carding the non-woven fabric obtained by preliminary hot rolling to obtain a waterproof base film;
and B5, taking the waterproof base film obtained after carding, and putting the waterproof base film into a hot rolling mill for secondary hot rolling to obtain the waterproof film.
The insect repellent film comprises the following components in equal parts by mass: 55 parts of ethylene terephthalate, 18 parts of polyethylene, 15 parts of calcium carbonate and 0.02 part of auxiliary agent;
the specific preparation steps of the insect repellent film are as follows:
c1, taking ethylene glycol terephthalate and polyethylene, and putting the polyethylene into a dryer for drying for 3 hours;
c2, placing the dried ethylene terephthalate, polyethylene, calcium carbonate and auxiliary agent into an automatic weighing proportioning machine for weighing proportioning;
c3, starting a vacuum suction pump to inject ethylene terephthalate, polyethylene materials and auxiliaries into a processing bin, and starting an extruder;
c4, conveying the base film extruded in the extruder into a soaking processing barrel for soaking for 8 hours;
c5, sending the soaked base film into a dryer for drying for 55min;
c6, taking out the dried base film, feeding the base film into a film blowing machine, and adjusting the blowing air quantity of the film blowing machine;
and C7, stretching the obtained base film to obtain the insect-repellent film.
The lapping speed of the lapping machine in the step B1 is 50m/min.
The hot roll temperature in the hot rolling mill of step B3 was 143 ℃.
And B5, during the secondary hot rolling, the pressure between hot rolls in the hot rolling mill is 4Mpa.
Stretching includes transverse stretching and longitudinal stretching, and the ratio of transverse stretching to longitudinal stretching is 2:3.
The soaking processing barrel is internally provided with an insect-repellent mixed solution which comprises the following components: 6 parts of star anise, 6 parts of fennel, 8 parts of pepper, 10 parts of mugwort leaf, 7 parts of rosin, 6 parts of willow leaf, 7 parts of dried chilli, 6 parts of wild chrysanthemum, 8 parts of tarragon, 35 parts of water and 2 parts of thickener.
A preparation method of a composite film for grain storage and packaging comprises the following steps:
s1, sequentially stacking the prepared waterproof film, the insect-repellent film and the PET non-woven fabric into a pressing machine for preliminary pressing;
s2, taking out the composite base film obtained by preliminary pressing, and putting the composite base film into a gluing machine for gluing;
s3, taking the composite base film subjected to the sizing treatment, and airing for 4 hours;
s4, after the airing is finished, putting the mixture into a pressing machine for secondary pressing;
s5, detecting to obtain the composite film.
Example 3:
a composite film for grain storage and package comprises PET non-woven fabric, high strength ventilated membrane and waterproof membrane.
The high-strength breathable film comprises the following components in equal parts by mass: 55 parts of ethylene terephthalate, 18 parts of polyethylene, 15 parts of calcium carbonate and 0.01 part of auxiliary agent, and the preparation steps of the high-strength breathable film are as follows:
a1, taking ethylene terephthalate and polyethylene, and putting the polyethylene into a dryer for drying for 4 hours;
a2, placing the dried ethylene terephthalate, polyethylene, calcium carbonate and auxiliary agent into an automatic weighing proportioning machine for weighing proportioning;
a3, starting a vacuum suction pump to inject ethylene terephthalate, polyethylene materials and additives into a processing bin, and starting an extruder;
a4, feeding the base film extruded from the extruder into a film blowing machine, and adjusting the extrusion amount of the extruder and the blowing air quantity of the film blowing machine;
a5, stretching the obtained base film to obtain a stretched base film;
and A6, carrying out corona treatment on the stretched base film to obtain the high-strength breathable film.
The waterproof membrane comprises the following components in equal parts by mass: polyethylene fibers, polypropylene fibers, and superabsorbent fibers;
the preparation method of the waterproof film comprises the following steps:
b1, placing polyethylene fibers and polypropylene fibers in a lapping machine for lapping;
b2, spraying the super absorbent fibers on the polyethylene fibers and the polypropylene fibers to obtain a fiber web in the lapping process;
b3, placing the fiber web into a hot rolling mill for preliminary hot rolling to obtain a non-woven fabric;
b4, carding the non-woven fabric obtained by preliminary hot rolling to obtain a waterproof base film;
and B5, taking the waterproof base film obtained after carding, and putting the waterproof base film into a hot rolling mill for secondary hot rolling to obtain the waterproof film.
The lapping speed of the lapping machine in the step B1 is 50m/min.
The hot roll temperature in the hot rolling mill of step B3 was 143 ℃.
And B5, during the secondary hot rolling, the pressure between hot rolls in the hot rolling mill is 4Mpa.
Stretching includes transverse stretching and longitudinal stretching, and the ratio of transverse stretching to longitudinal stretching is 2:3.
A preparation method of a composite film for grain storage and packaging comprises the following steps:
s1, sequentially stacking the prepared high-strength breathable film, waterproof film and PET non-woven fabric into a pressing machine for preliminary pressing;
s2, taking out the composite base film obtained by preliminary pressing, and putting the composite base film into a gluing machine for gluing;
s3, taking the composite base film subjected to the sizing treatment, and airing for 4 hours;
s4, after the airing is finished, putting the mixture into a pressing machine for secondary pressing;
s5, detecting to obtain the composite film.
Example 4:
a composite film for grain storage and package comprises PET non-woven fabric, high strength ventilated membrane and insect-repellent membrane.
The high-strength breathable film comprises the following components in equal parts by mass: 55 parts of ethylene terephthalate, 18 parts of polyethylene, 15 parts of calcium carbonate and 0.01 part of auxiliary agent, and the preparation steps of the high-strength breathable film are as follows:
a1, taking ethylene terephthalate and polyethylene, and putting the polyethylene into a dryer for drying for 4 hours;
a2, placing the dried ethylene terephthalate, polyethylene, calcium carbonate and auxiliary agent into an automatic weighing proportioning machine for weighing proportioning;
a3, starting a vacuum suction pump to inject ethylene terephthalate, polyethylene materials and additives into a processing bin, and starting an extruder;
a4, feeding the base film extruded from the extruder into a film blowing machine, and adjusting the extrusion amount of the extruder and the blowing air quantity of the film blowing machine;
a5, stretching the obtained base film to obtain a stretched base film;
and A6, carrying out corona treatment on the stretched base film to obtain the high-strength breathable film.
The insect repellent film comprises the following components in equal parts by mass: 55 parts of ethylene terephthalate, 18 parts of polyethylene, 15 parts of calcium carbonate and 0.02 part of auxiliary agent;
the specific preparation steps of the insect repellent film are as follows:
c1, taking ethylene glycol terephthalate and polyethylene, and putting the polyethylene into a dryer for drying for 3 hours;
c2, placing the dried ethylene terephthalate, polyethylene, calcium carbonate and auxiliary agent into an automatic weighing proportioning machine for weighing proportioning;
c3, starting a vacuum suction pump to inject ethylene terephthalate, polyethylene materials and auxiliaries into a processing bin, and starting an extruder;
c4, conveying the base film extruded in the extruder into a soaking processing barrel for soaking for 8 hours;
c5, sending the soaked base film into a dryer for drying for 55min;
c6, taking out the dried base film, feeding the base film into a film blowing machine, and adjusting the blowing air quantity of the film blowing machine;
and C7, stretching the obtained base film to obtain the insect-repellent film.
Stretching includes transverse stretching and longitudinal stretching, and the ratio of transverse stretching to longitudinal stretching is 2:3.
The soaking processing barrel is internally provided with an insect-repellent mixed solution which comprises the following components: 6 parts of star anise, 6 parts of fennel, 8 parts of pepper, 10 parts of mugwort leaf, 7 parts of rosin, 6 parts of willow leaf, 7 parts of dried chilli, 6 parts of wild chrysanthemum, 8 parts of tarragon, 35 parts of water and 2 parts of thickener.
A preparation method of a composite film for grain storage and packaging comprises the following steps:
s1, sequentially stacking the prepared high-strength breathable film, the insect-repellent film and the PET non-woven fabric into a pressing machine for preliminary pressing;
s2, taking out the composite base film obtained by preliminary pressing, and putting the composite base film into a gluing machine for gluing;
s3, taking the composite base film subjected to the sizing treatment, and airing for 4 hours;
s4, after the airing is finished, putting the mixture into a pressing machine for secondary pressing;
s5, detecting to obtain the composite film.
Cutting the composite film in the above examples 1-4 into strip films with the same size and shape, and carrying out tension test on the composite film by using YG026C type tension machine, wherein the test result and performance parameters are as follows;
taking the strip-shaped films obtained by cutting in the embodiments 1-4, sewing into storage packaging bags with the same size and shape, putting 1000 full healthy grain seeds with the same specification into each group of packaging bags, fastening, putting the packaging bags into the same place, detecting the seeds in each group of packaging bags after 30 days, and testing the following data:
TABLE 1
As can be seen from Table 1 and examples 1 to 4, in the preparation process of the high-strength breathable film, the raw materials and the proportion of the high-strength breathable film are changed, so that the prepared high-strength breathable film has the effects of high strength and high oxygen permeability, and in the preparation process, the oxygen permeability of the high-strength breathable film is further improved through the bidirectional stretching of the high-strength breathable film, and the effect of high air permeability is further achieved.
In the preparation process of the waterproof membrane, the preparation raw materials of the membrane are changed into polyethylene fibers, polypropylene fibers and high-water-absorption fibers, the high-water-absorption fibers can effectively absorb moisture in air, the probability of mildew caused by the moisture during grain storage is further reduced, and in the preparation process, the high-water-absorption fibers are sprayed onto the fiber webs of the polyethylene fibers and the polypropylene fibers, so that the high-water-absorption fibers are more easily combined with the fiber web, and the water absorption effect of the waterproof membrane is further improved.
In the preparation process of the insect-repellent film, the prepared base film is soaked in a soaking processing barrel, so that insect-repellent materials in the soaking processing barrel can be soaked in the base film, the insect-repellent film has an insect-repellent effect, and the materials in the soaking processing barrel are nontoxic medicinal materials or herbal medicines and can be used with confidence.
The present invention is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present invention and the inventive concept thereof, can be replaced or changed within the scope of the present invention.
Claims (6)
1. The composite film for grain storage and packaging is characterized by comprising PET non-woven fabrics, a high-strength breathable film, a waterproof film and an insect-repellent film;
the high-strength breathable film comprises the following components in parts by mass: 50-60 parts of ethylene terephthalate, 15-20 parts of polyethylene, 10-20 parts of calcium carbonate and 0.01-0.02 part of auxiliary agent, wherein the preparation steps of the high-strength breathable film are as follows:
a1, taking ethylene terephthalate and polyethylene, and putting the polyethylene into a dryer for drying for 3-5 hours;
a2, placing the dried ethylene terephthalate, polyethylene, calcium carbonate and auxiliary agent into an automatic weighing proportioning machine for weighing proportioning;
a3, starting a vacuum suction pump to inject ethylene terephthalate, polyethylene materials and additives into a processing bin, and starting an extruder;
a4, feeding the base film extruded from the extruder into a film blowing machine, and adjusting the extrusion amount of the extruder and the blowing air quantity of the film blowing machine;
a5, stretching the obtained base film to obtain a stretched base film;
a6, carrying out corona treatment on the stretched base film to obtain a high-strength breathable film;
the waterproof membrane comprises the following components: the high-water-absorption fiber comprises polyethylene fibers, polypropylene fibers and high-water-absorption fibers, wherein the polyethylene fibers, the polypropylene fibers and the high-water-absorption fibers are equal in mass parts;
the preparation method of the waterproof film comprises the following steps:
b1, placing polyethylene fibers and polypropylene fibers in a lapping machine for lapping;
b2, spraying the super absorbent fibers on the polyethylene fibers and the polypropylene fibers to obtain a fiber web in the lapping process;
b3, placing the fiber web into a hot rolling mill for preliminary hot rolling to obtain a non-woven fabric;
b4, carding the non-woven fabric obtained by preliminary hot rolling to obtain a waterproof base film;
b5, taking the waterproof base film obtained after carding, and putting the waterproof base film into a hot rolling mill for secondary hot rolling to obtain a waterproof film;
the insect repellent film comprises the following components in parts by mass: 50-60 parts of ethylene terephthalate, 15-20 parts of polyethylene, 10-20 parts of calcium carbonate and 0.01-0.02 part of auxiliary agent;
the specific preparation steps of the insect repellent film are as follows:
c1, taking ethylene glycol terephthalate and polyethylene, and putting the polyethylene into a dryer for drying for 2-3 hours;
c2, placing the dried ethylene terephthalate, polyethylene, calcium carbonate and auxiliary agent into an automatic weighing proportioning machine for weighing proportioning;
c3, starting a vacuum suction pump to inject ethylene terephthalate, polyethylene materials and auxiliaries into a processing bin, and starting an extruder;
c4, conveying the base film extruded in the extruder into a soaking processing barrel for soaking for 7-9h;
c5, sending the soaked base film into a dryer for drying for 50-60min;
c6, taking out the dried base film, feeding the base film into a film blowing machine, and adjusting the blowing air quantity of the film blowing machine;
c7, stretching the obtained base film to obtain an insect-repellent film;
the soaking processing barrel is internally provided with an insect-repellent mixed solution, and the insect-repellent mixed solution comprises the following components: 5-8 parts of star anise, 6-7 parts of fennel, 6-8 parts of pepper, 8-10 parts of mugwort leaf, 6-8 parts of rosin, 5-7 parts of willow leaf, 6-8 parts of dried pepper, 5-8 parts of wild chrysanthemum, 8-9 parts of tarragon, 30-40 parts of water and 1-2 parts of thickener;
s1, sequentially stacking the prepared high-strength breathable film, waterproof film, insect-repellent film and PET non-woven fabric into a pressing machine for preliminary pressing;
s2, taking out the composite base film obtained by preliminary pressing, and putting the composite base film into a gluing machine for gluing;
s3, taking the composite base film subjected to the sizing treatment, and airing for 3-4 hours;
s4, after the airing is finished, putting the mixture into a pressing machine for secondary pressing;
s5, detecting to obtain the composite film.
2. The composite film for grain storage packaging of claim 1, wherein: and B1, the lapping speed of the lapping machine is 40-60m/min.
3. The composite film for grain storage packaging of claim 1, wherein the hot roll temperature in the hot rolling mill of step B3 is 140-145 ℃.
4. The composite film for grain storage packaging according to claim 1, wherein the pressure between hot rolls in the hot rolling mill is 4-5Mpa during the secondary hot rolling in step B5.
5. The composite film for grain storage packaging of claim 1 wherein the stretching comprises transverse stretching and longitudinal stretching and the ratio of transverse stretching to longitudinal stretching is 2:3.
6. A preparation method of a composite film for grain storage and packaging comprises the following steps:
the high-strength breathable film comprises the following components in parts by weight: 50-60 parts of ethylene terephthalate, 15-20 parts of polyethylene, 10-20 parts of calcium carbonate and 0.01-0.02 part of auxiliary agent, wherein the preparation steps of the high-strength breathable film are as follows:
a1, taking ethylene terephthalate and polyethylene, and putting the polyethylene into a dryer for drying for 3-5 hours;
a2, placing the dried ethylene terephthalate, polyethylene, calcium carbonate and auxiliary agent into an automatic weighing proportioning machine for weighing proportioning;
a3, starting a vacuum suction pump to inject ethylene terephthalate, polyethylene materials and additives into a processing bin, and starting an extruder;
a4, feeding the base film extruded from the extruder into a film blowing machine, and adjusting the extrusion amount of the extruder and the blowing air quantity of the film blowing machine;
a5, stretching the obtained base film to obtain a stretched base film;
a6, carrying out corona treatment on the stretched base film to obtain a high-strength breathable film;
the waterproof membrane comprises the following components: the high-water-absorption fiber comprises polyethylene fibers, polypropylene fibers and high-water-absorption fibers, wherein the polyethylene fibers, the polypropylene fibers and the high-water-absorption fibers are equal in mass parts;
the preparation method of the waterproof film comprises the following steps:
b1, placing polyethylene fibers and polypropylene fibers in a lapping machine for lapping;
b2, spraying the super absorbent fibers on the polyethylene fibers and the polypropylene fibers to obtain a fiber web in the lapping process;
b3, placing the fiber web into a hot rolling mill for preliminary hot rolling to obtain a non-woven fabric;
b4, carding the non-woven fabric obtained by preliminary hot rolling to obtain a waterproof base film;
b5, taking the waterproof base film obtained after carding, and putting the waterproof base film into a hot rolling mill for secondary hot rolling to obtain a waterproof film;
the insect repellent film comprises the following components in parts by mass: 50-60 parts of ethylene terephthalate, 15-20 parts of polyethylene, 10-20 parts of calcium carbonate and 0.01-0.02 part of auxiliary agent;
the specific preparation steps of the insect repellent film are as follows:
c1, taking ethylene glycol terephthalate and polyethylene, and putting the polyethylene into a dryer for drying for 2-3 hours;
c2, placing the dried ethylene terephthalate, polyethylene, calcium carbonate and auxiliary agent into an automatic weighing proportioning machine for weighing proportioning;
c3, starting a vacuum suction pump to inject ethylene terephthalate, polyethylene materials and auxiliaries into a processing bin, and starting an extruder;
c4, conveying the base film extruded in the extruder into a soaking processing barrel for soaking for 7-9h;
c5, sending the soaked base film into a dryer for drying for 50-60min;
c6, taking out the dried base film, feeding the base film into a film blowing machine, and adjusting the blowing air quantity of the film blowing machine;
c7, stretching the obtained base film to obtain an insect-repellent film;
the soaking processing barrel is internally provided with an insect-repellent mixed solution, and the insect-repellent mixed solution comprises the following components: 5-8 parts of star anise, 6-7 parts of fennel, 6-8 parts of pepper, 8-10 parts of mugwort leaf, 6-8 parts of rosin, 5-7 parts of willow leaf, 6-8 parts of dried pepper, 5-8 parts of wild chrysanthemum, 8-9 parts of tarragon, 30-40 parts of water and 1-2 parts of thickener;
s1, sequentially stacking the prepared high-strength breathable film, waterproof film, insect-repellent film and PET non-woven fabric into a pressing machine for preliminary pressing;
s2, taking out the composite base film obtained by preliminary pressing, and putting the composite base film into a gluing machine for gluing;
s3, taking the composite base film subjected to the sizing treatment, and airing for 3-4 hours;
s4, after the airing is finished, putting the mixture into a pressing machine for secondary pressing;
s5, detecting to obtain the composite film.
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