CN110757710A - Fresh-keeping packaging kit and preparation method thereof - Google Patents
Fresh-keeping packaging kit and preparation method thereof Download PDFInfo
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- CN110757710A CN110757710A CN201910921943.0A CN201910921943A CN110757710A CN 110757710 A CN110757710 A CN 110757710A CN 201910921943 A CN201910921943 A CN 201910921943A CN 110757710 A CN110757710 A CN 110757710A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/35—Component parts; Details or accessories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3442—Mixing, kneading or conveying the foamable material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/35—Component parts; Details or accessories
- B29C44/355—Characteristics of the foam, e.g. having particular surface properties or structure
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- Packages (AREA)
- Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
Abstract
The invention discloses a freshness protection package kit and a preparation method thereof, wherein the freshness protection package kit can treat fruits and vegetables wrapped in the freshness protection package kit through a resonance effect so as to slow down the respiration of the fruits and vegetables, thereby prolonging the freshness protection period of the fruits and vegetables, and the freshness protection package kit is provided with a plurality of air holes, so that ethylene, carbon dioxide and moisture generated by the respiration of the wrapped fruits and vegetables can be discharged, and the ripening of the fruits and vegetables can be slowed down. In addition, the freshness protection package kit is light, thin and breathable, has good elasticity, is convenient for wrapping fruits and vegetables, and can resist shock and collision in the transportation and storage processes of the fruits and vegetables so as to prolong the freshness period of the fruits and vegetables.
Description
Technical Field
The invention relates to the technical field of preservation, in particular to a preservative packaging kit and a preparation method thereof.
Background
The fresh food generally has a short storage period, and the fresh food can be shortened due to the influence of various organisms, microorganisms and environmental factors in the transportation and storage processes of the fresh food such as fruits, vegetables, fresh flowers, seafood and the like. Therefore, if fresh food is not preserved during transportation or storage, a large amount of fresh food is lost. Especially, in the process of transporting and storing the fruits and vegetables, the picked fresh fruits and vegetables still have life activity in the storage period, substances and heat released by respiration and transpiration have great influence on the quality of the fruits and vegetables, so that the weight of the fruits and vegetables is usually reduced, the nutrition is lost, the appearance and the color are damaged, the fruits and vegetables are seriously even rotted and deteriorated, and the edible value is finally lost.
Environmental factors such as temperature, humidity, gas concentration and the like have great influence on the respiration of fruits and vegetables and the evaporation rate of water, so at present, the fruits and vegetables are preserved by mainly using a refrigeration mode in the transportation and storage processes of the fruits and vegetables, the refrigeration needs a sealed space and has great dependence on electric energy, the long-distance transportation is not facilitated, the high transportation cost can be caused, and the loss caused by collision between the fruits and vegetables can not be avoided. Therefore, in the process of refrigerated transportation and storage, protective measures for external packaging of fruits and vegetables, such as wrapping of freshness protection bags, freshness protection covers and freshness protection nets, are also needed. In addition, the common freshness protection package bag cannot ventilate when used for packaging fruits and vegetables, so that the respiration of the fruits and vegetables can generate ethylene, carbon dioxide and water which are enriched on the surfaces of the fruits and vegetables, the maturity of the fruits and vegetables can be accelerated, and therefore the freshness protection package of the fruits and vegetables needs to ventilate and can discharge the ethylene, the carbon dioxide and the water generated by the respiration of the fruits and vegetables.
It is worth mentioning that the common fresh-keeping method for fruits and vegetables also comprises a chemical fresh-keeping method, and although the method can prolong the fresh-keeping period of the fruits and vegetables to a certain extent, the method has the problem of chemical reagent residue, and is not beneficial to human health and environmental protection.
Disclosure of Invention
An object of the present invention is to provide a freshness protection package kit and a method for preparing the same, wherein the freshness protection package kit can wrap fruits and vegetables to protect and keep the fruits and vegetables fresh during transportation and storage of the fruits and vegetables.
Another object of the present invention is to provide a freshness protection package kit and a method for preparing the same, wherein the freshness protection package kit is activated by an energy material, and the freshness protection package kit can have negative ions, far infrared rays and energy, so that the freshness protection package kit can perform freshness protection treatment on fruits and vegetables.
Another object of the present invention is to provide a freshness protection package kit and a method for manufacturing the same, in which the energy material can activate the freshness protection package kit through a resonance effect, so that the freshness protection package kit can have negative ions, far infrared rays and energy.
Another object of the present invention is to provide a freshness protection package kit and a method for preparing the same, wherein the freshness protection package kit can treat the wrapped fruits and vegetables through resonance effect, and can slow down respiration of the fruits and vegetables, so as to prolong the freshness protection period of the fruits and vegetables.
Another object of the present invention is to provide a freshness protection package kit and a method for preparing the same, wherein the freshness protection package kit can release negative ions and far infrared rays, and the negative ions released by the freshness protection package kit can destroy metabolic enzymes in fruits and vegetables, so as to reduce the respiration intensity of the fruits and vegetables, and prolong the freshness protection period of the fruits and vegetables.
Another objective of the present invention is to provide a freshness protection package kit and a preparation method thereof, wherein negative ions released by the freshness protection package kit can kill harmful microorganisms in the environment, prevent the harmful microorganisms from affecting fruits and vegetables, and delay the hydrolysis of organic substances of the fruits, thereby prolonging the freshness protection period of the fruits and vegetables.
Another object of the present invention is to provide a freshness protection package kit and a method for preparing the same, wherein the freshness protection package kit is configured as a net structure for fruits and vegetables enclosed therein to discharge ethylene, carbon dioxide and moisture generated by respiration, so as to slow down the ripening of the fruits and vegetables.
Another object of the present invention is to provide a freshness protection package kit and a method for manufacturing the same, wherein the freshness protection package kit is foamed by the method for manufacturing the freshness protection package kit, so that the freshness protection package kit has a plurality of ventilation holes, thereby facilitating ventilation of fruits and vegetables and reducing the weight of the packaged fruits and vegetables, and further preventing the wrapped fruits and vegetables from being shocked and collided.
The invention also aims to provide a fresh-keeping packaging kit and a preparation method thereof, wherein the fresh-keeping packaging kit is used for fresh-keeping packaging of fruits and vegetables, so that a fresh-keeping method with low transportation cost and good fresh-keeping effect can be provided.
In order to achieve at least one of the above objects, the present invention provides a method for preparing a fresh keeping package kit, comprising the steps of:
(a) mixing an energy material, a foaming agent and talcum powder into plastic to obtain a mixture;
(b) heating the mixture to melt to form a melt;
(c) increasing the heating temperature to vaporize the blowing agent in the melt, thereby generating gas-filled molecules in the melt to foam and expand the melt;
(d) reducing the temperature to cause partial shrinkage and hardening of the melt;
(e) introducing a gas into the melt to cause further foaming and expansion of the melt, thereby increasing the strength of the melt;
(g) heating the melt at room temperature and atmospheric pressure and allowing the melt to expand freely; and
(g) after the melt is free to expand, the melt is shaped to form the freshness packaging kit.
In one embodiment of the present invention, in the step (a), the energy material is a material prepared by the following steps:
(S1) generating energy by an energy generating device;
(S2) an energy mineral absorbs the energy generated by the energy generating means, releasing negative ions, far infrared rays and energy; and
(S3) an object is subjected to activation treatment of negative ions, far infrared rays and energy released from the energy ore to generate the energy material.
In one embodiment of the present invention, in the step (a), the energy material and the plastic generate a resonance effect to enable the mixture to be activated and have energy.
In one embodiment of the present invention, wherein in the step (a), the mixture consists of the following raw materials in parts by weight: 1-2 parts of the energy material, 10-12.5 parts of the foaming agent, 1-2 parts of the talcum powder and 500 parts of the plastic.
In an embodiment of the present invention, in the step (a), 0.2 to 0.6 parts of a cross-linking agent is mixed.
In one embodiment of the present invention, wherein in the step (a), the plastic is high pressure low density polyethylene.
In an embodiment of the present invention, in the step (a), the foaming agent is one of air, nitrogen and carbon dioxide.
In an embodiment of the present invention, in the step (a), the foaming agent is one of sodium bicarbonate, sodium carbonate, azodicarbonamide and azobisisobutyronitrile.
In an embodiment of the present invention, wherein in the step (e), the gas introduced is any one of butane and pentane, in terms of weight fraction, wherein 100 parts of the gas is introduced in the step (e).
In one embodiment of the present invention, wherein in the step (e), the gas is introduced into the melt by mechanical stirring, physical melting, or chemical reaction.
In one embodiment of the present invention, wherein in the step (b), the mixture is heated by an energy heater to impart energy to the melt.
In one embodiment of the present invention, the energy heater is a burner.
In one embodiment of the present invention, wherein in the step (b), the temperature range at which the mixture is melted to form the melt is 140 ℃ to 170 ℃.
In one embodiment of the present invention, wherein in the step (c), the temperature range in which the foaming agent in the melt is gasified is 180 ℃ to 200 ℃.
In an embodiment of the present invention, in the step (d), the melt is cooled by an energy fan, so that the melt has energy.
In one embodiment of the present invention, wherein in the step (d), the temperature is reduced to 150 ℃ to partially shrink and harden the melt.
In one embodiment of the present invention, wherein in the step (f), the melt is heated to 105 ℃ to facilitate setting of the melt.
In an embodiment of the present invention, wherein in the step (g), the melt is shaped by any one of extrusion, injection, molding, casting and calendering.
In one embodiment of the present invention, in the step (g), the melt is shaped into a net structure by extrusion or injection, so as to form a freshness-retaining packaging net.
In one embodiment of the present invention, in the step (g), the melt is shaped into a film structure by calendering, so as to form a freshness protection packaging film.
In one embodiment of the present invention, wherein in the step (g), the melt is shaped into a sleeve-like structure by casting or molding, thereby forming a freshness-retaining packaging sleeve.
In one embodiment of the present invention, in the step (g), the melt is shaped into a bag-shaped structure by calendering, so as to form a freshness protection package bag.
The invention also provides a preparation method of the fresh-keeping packaging kit in another aspect, which comprises the following steps:
(a) mixing a foaming agent and talcum powder into plastic to obtain a mixture;
(b) heating the mixture to melt to form a melt;
(c) increasing the heating temperature to vaporize the blowing agent in the melt, thereby generating gas-filled molecules in the melt to foam and expand the melt;
(d) reducing the temperature to cause partial shrinkage and hardening of the melt;
(e) introducing a gas into the melt to cause further foaming and expansion of the melt, thereby increasing the strength of the melt;
(f) heating the melt at room temperature and atmospheric pressure and allowing the melt to expand freely;
(g) after the melt has expanded freely, shaping the melt, and
(h) and carrying out activation treatment on the shaped melt, thereby generating the freshness-keeping packaging kit.
In one embodiment of the present invention, wherein in the step (h), the melt is activated in an energy bin, so that the freshness packaging kit has energy.
In one embodiment of the present invention, in the step (h), the melt is activated by an energy material in a resonance effect manner, so that the freshness protection package kit is provided with energy.
In one embodiment of the present invention, in the step (h), the energy material is a material prepared by the following steps:
(S1) generating energy by an energy generating device;
(S2) an energy mineral absorbs the energy generated by the energy generating means, releasing negative ions, far infrared rays and energy; and
(S3) an object is subjected to activation treatment of negative ions, far infrared rays and energy released from the energy ore to generate the energy material.
In one embodiment of the present invention, wherein in the step (a), the mixture consists of the following raw materials in parts by weight: 10-12.5 parts of the foaming agent, 1-2 parts of the talcum powder and 500 parts of the plastic.
In an embodiment of the present invention, in the step (a), 0.2 to 0.6 parts of a cross-linking agent is mixed.
In one embodiment of the present invention, wherein in the step (a), the plastic is high pressure low density polyethylene.
In an embodiment of the present invention, in the step (a), the foaming agent is one of air, nitrogen, carbon dioxide and carbon-oxygen compound.
In an embodiment of the present invention, in the step (a), the foaming agent is one of sodium bicarbonate, sodium carbonate, azodicarbonamide and azobisisobutyronitrile.
In an embodiment of the present invention, wherein in the step (e), the gas introduced is any one of butane, pentane and nitrogen, in terms of weight fraction, wherein 100 parts of the gas is introduced in the step (e).
In one embodiment of the present invention, wherein in the step (e), the gas is introduced into the melt by mechanical stirring, physical melting, or chemical reaction.
In one embodiment of the present invention, wherein in the step (b), the mixture is heated by an energy heater to impart energy to the melt.
In one embodiment of the present invention, the energy heater is a burner.
In one embodiment of the present invention, wherein in the step (b), the temperature range at which the mixture is melted to form the melt is 140 ℃ to 170 ℃.
In one embodiment of the present invention, wherein in the step (c), the temperature range in which the foaming agent in the melt is gasified is 180 ℃ to 200 ℃.
In an embodiment of the present invention, in the step (d), the melt is cooled by an energy fan, so that the melt has energy.
In one embodiment of the present invention, wherein in the step (d), the temperature is reduced to 150 ℃ to partially shrink and harden the melt.
In one embodiment of the present invention, wherein in the step (f), the melt is heated to 105 ℃ to facilitate setting of the melt.
In an embodiment of the present invention, wherein in the step (g), the melt is shaped by any one of extrusion, injection, molding, casting and calendering.
In one embodiment of the present invention, in the step (g), the melt is shaped into a net structure by extrusion or injection, so as to form a freshness-retaining packaging net.
In one embodiment of the present invention, in the step (g), the melt is shaped into a film structure by calendering, so as to form a freshness protection packaging film.
In one embodiment of the present invention, wherein in the step (g), the melt is shaped into a sleeve-like structure by casting or molding, thereby forming a freshness-retaining packaging sleeve.
In one embodiment of the present invention, in the step (g), the melt is shaped into a bag-shaped structure by calendering, so as to form a freshness protection package bag.
The invention also provides a freshness protection package kit, wherein the freshness protection package kit is prepared by the preparation method of the freshness protection package kit.
Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "vertical," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, the above terms should not be construed as limiting the present invention.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention provides a freshness protection package kit, wherein the freshness protection package kit can treat fruits and vegetables wrapped in the freshness protection package kit through a resonance effect so as to slow down the respiration of the fruits and vegetables, thereby prolonging the freshness protection period of the fruits and vegetables. In addition, the freshness protection package kit is light, thin and breathable, has good elasticity, is convenient for wrapping fruits and vegetables, and can resist shock and collision in the transportation and storage processes of the fruits and vegetables so as to prolong the freshness period of the fruits and vegetables. The freshness-retaining packaging kit is prepared by the following preparation method:
example 1:
the invention provides a preparation method of a fresh-keeping packaging kit, which comprises the following steps:
(a) mixing an energy material, a foaming agent and talcum powder into plastic to obtain a mixture;
(b) heating the mixture to melt to form a melt;
(c) increasing the heating temperature to vaporize the blowing agent in the melt, thereby generating gas-filled molecules in the melt to foam and expand the melt;
(d) reducing the temperature to cause partial shrinkage and hardening of the melt;
(e) introducing a gas into the melt to cause further foaming and expansion of the melt, thereby increasing the strength of the melt;
(f) heating the melt at room temperature and atmospheric pressure and allowing the melt to expand freely; and
(g) after the melt is free to expand, the melt is shaped to form the freshness packaging kit.
It is worth mentioning that, in the step (a), the mixture is composed of the following raw materials in terms of weight fraction: 1-2 parts of the energy material, 10-12.5 parts of the foaming agent, 1-2 parts of the talcum powder and 500 parts of the plastic. Specifically, when 1 ton of the plastic is used as a raw material, 2-4 kg of the energy material, 20-25 kg of the foaming agent and 2-4 kg of the talcum powder are required to be used for preparing the mixture.
In particular, wherein in the step (a), the energy material is an energy material prepared by the following steps:
(S1) generating energy by an energy generating device;
(S2) an energy mineral absorbs the energy generated by the energy generating means, releasing negative ions, far infrared rays and energy; and
(S3) an object is subjected to activation treatment of negative ions, far infrared rays and energy released from the energy ore to generate the energy material.
For example, the energy generating device may be, but not limited to, implemented as a burner for generating energy, far infrared rays and negative ions by means of combustion, for example, the burner disclosed in chinese patent application No. 200810065335.6 publication No. 101504140 may be used as the burner for mixing air and gas several times in a mixing device to form a swirl mixed gas flow and burning the swirl mixed gas flow outside a conical flame hole, and a large amount of energy, far infrared rays and negative ions are generated in the process of forming a flame by using rapid collision of the gas and the gas during combustion and the swirl mixed gas flow. The energy mineral may be embodied as, but not limited to, tourmaline or jade. The energy mineral material can release the absorbed energy in a far infrared ray and anion mode so as to activate the object to form the energy material, namely, the energy material can also release the energy in a far infrared ray and anion mode so as to activate the plastic through a resonance effect, so that the plastic has the far infrared ray, the anion and the energy, therefore, the preservation packaging kit prepared by the preparation method of the preservation packaging kit can release the far infrared ray, the anion and the energy, wherein the far infrared ray released by the preservation packaging kit can activate the fruits and vegetables wrapped in the preservation packaging kit through the resonance effect, and the released anion can kill harmful microorganisms in the environment and destroy metabolic enzymes in the fruits and vegetables, thereby slowing the respiration and curing of the fruits and vegetables and prolonging the fresh-keeping period of the fruits and vegetables.
Alternatively, in some embodiments of the present invention, the energy ore may also be implemented as a plant, wherein the plant is a plant grown in an energy magnetic field chamber, and the plant itself has far infrared rays, negative ions and energy due to the energy treatment of the energy magnetic field chamber.
It is worth mentioning that, in the step (a), the plastic is implemented as a high pressure low density polyethylene. The high-pressure low-density polyethylene has the advantages of sound insulation, heat insulation, shock resistance and the like, and can prevent the shock and heat insulation when the fruits and vegetables are wrapped by the preservation net so as to avoid collision damage between the fruits and vegetables and rapid curing of the fruits and vegetables at high temperature, thereby prolonging the preservation period of the fruits and vegetables.
It is also worth mentioning that, in the step (a), the foaming agent may be a physical foaming agent or a chemical foaming agent. For example, when a physical blowing agent is used, the blowing agent may be one of air, nitrogen, and carbon dioxide, which are colorless, odorless, nontoxic, and inexpensive, and facilitate the practical manufacture of the freshness packaging kit. When a chemical blowing agent is used, the blowing agent may be one of sodium bicarbonate, sodium carbonate, azodicarbonamide, azobisisobutyronitrile.
It is worth mentioning that in the step (a), 0.2-0.6 part of cross-linking agent can be added for enhancing the heat resistance, flame retardance, solvent resistance, mechanical strength, electrical property and the like of the freshness protection package kit.
Furthermore, it is worth mentioning that, in the step (a), the talc is mainly used as a flow aid, which can fill and level up the depressions on the surface of the melt, reduce the roughness of the surface of the melt, and thereby reduce the friction of the melt to improve the fluidity of the melt, thereby facilitating the extrusion and shaping of the melt in the steps (f) and (g).
Further, in the step (b), the mixture is heated by an energy heater so that the melt has energy. It is understood that the energy heater releases negative ions, far infrared rays and energy during heating for absorption by the melt, thereby injecting energy into the melt.
It is worth mentioning that the energy heater may be implemented as a burner.
Further wherein in step (b) the temperature at which the mixture melts to form the melt ranges from 140 ℃ to 170 ℃. Preferably, the mixture melts to form the melt when the mixture is heated to 170 ℃.
It should be noted that, in some embodiments of the present invention, the mixture may also be heated to form a liquid mixture, which is not limited by the present invention.
Still further wherein in said step (c) the temperature at which the blowing agent in the melt vaporizes ranges from 180 ℃ to 200 ℃. Preferably, when the heating temperature is increased to 200 ℃, the foaming agent in the melt vaporizes, thereby generating gas-filled molecules in the melt, causing the melt to foam and expand.
It is worth mentioning that in the step (d), the melt is cooled by an energy fan to make the melt have energy. Specifically, the energy fan may be provided with the energy material, when the energy fan is powered on, the energy material is excited to generate energy, negative ions, and far infrared rays, and in the process of cooling the melt by the energy fan, the energy, the negative ions, and the far infrared rays released by the energy fan are further injected into the melt, so that the melt has energy.
Further wherein in step (d) the temperature is reduced to 150 ℃ such that the melt is partially contracted and hardened, in particular, such that the gas-filled molecules of the melt are partially contracted and hardened.
Still further, wherein the gas cited in the step (e) may be, but is not limited to, butane, pentane or nitrogen, in terms of weight fraction, wherein 100 parts of the gas is introduced in the step (e), that is, 200 kg of the butane is introduced when the raw material is 1 ton of the plastic, for further foaming and expansion of the plastic, thereby increasing the strength of the gas-filled molecules in the plastic.
It is worth mentioning that in the step (e), the gas may be introduced into the melt by mechanical stirring, physical melting, or chemical reaction, which is not limited by the invention.
Further wherein in said step (f) said melt is heated to 105 ℃ at ambient temperature and pressure and said heated melt is extruded through an output device into a free expansion zone to facilitate free expansion of said melt in said free expansion zone. It will be appreciated that, due to the free expansion at room temperature and pressure, the melt does not expand explosively, so as to ensure safety during the production of the freshness protection package kit.
Still further, wherein in the step (g), the melt may be shaped by any one of extrusion, injection, molding, casting, and calendering. Preferably, in this embodiment of the present invention, the melt is shaped by means of extrusion to produce the freshness packaging kit.
Illustratively, in step (g), the melt is shaped into a net structure by extrusion or injection, thereby forming a freshness-retaining packaging net.
Illustratively, in the step (g), the melt is formed into a film structure by calendering, thereby producing a freshness-retaining packaging film.
Illustratively, wherein in step (g), the melt is shaped into a sleeve-like structure by casting or molding, thereby producing a freshness-retaining packaging sleeve.
Illustratively, in the step (g), the melt is shaped into a bag-shaped structure by calendering, so as to generate a freshness-retaining packaging bag.
That is, different freshness protection package products can be correspondingly produced by different shaping structures of the melt in the step (g), so that the freshness protection package kit can include, but is not limited to, a freshness protection package net, a freshness protection package film, a freshness protection package sleeve and a freshness protection package bag, which is not limited in this respect. It can be understood that, because the production process of the freshness protection package kit is in a foaming process, the freshness protection package kit is provided with a plurality of air holes, ethylene, carbon dioxide and moisture generated by the respiration of the fruits and vegetables wrapped in the freshness protection package kit are favorably discharged, so that the ripening of the fruits and vegetables can be slowed down, and the freshness protection period of the fruits and vegetables is prolonged.
It will also be appreciated that the freshness protection package kit is formed from low density polyethylene, which is lightweight, has good resiliency and flexibility to facilitate packaging of fruits and vegetables, and can be easily transported.
Example 2:
the invention provides a preparation method of a fresh-keeping packaging kit, which comprises the following steps:
(a) mixing a foaming agent and talcum powder into plastic to obtain a mixture;
(b) heating the mixture to melt to form a melt;
(c) increasing the heating temperature to vaporize the blowing agent in the melt, thereby generating gas-filled molecules in the melt to foam and expand the melt;
(d) reducing the temperature to cause partial shrinkage and hardening of the melt;
(e) introducing a gas into the melt to cause further foaming and expansion of the melt, thereby increasing the strength of the melt;
(f) heating the melt at room temperature and atmospheric pressure and allowing the melt to expand freely;
(g) after the melt has expanded freely, shaping the melt, and
(h) and carrying out activation treatment on the shaped melt, thereby generating the freshness-keeping packaging kit.
In one embodiment of the present invention, wherein in the step (h), the melt is activated in an energy bin, so that the freshness packaging kit has energy. In particular, where the energy compartment is an area where energy is generated by an energy generating device, for example, a space where energy can be released for tourmaline or an energy stone, when the melt is disposed in the energy compartment, the melt can absorb the energy of the energy compartment, so that the freshness packing kit can have energy.
In some embodiments of the present invention, in the step (h), the melt may also be activated by a resonance effect via an energy material, so that the freshness protection package has energy, negative ions and far infrared rays.
It is worth mentioning that, in the step (a), the mixture is composed of the following raw materials in terms of weight fraction: 10-12.5 parts of the foaming agent, 1-2 parts of the talcum powder and 500 parts of the plastic.
It is also worth mentioning that in the step (a), the plastic is implemented as a high pressure low density polyethylene. The blowing agent may be a physical blowing agent or a chemical blowing agent. For example, when a physical blowing agent is used, the blowing agent may be one of air, nitrogen, and carbon dioxide, which are colorless, odorless, nontoxic, and inexpensive, and facilitate the practical manufacture of the freshness packaging kit. When a chemical blowing agent is used, the blowing agent may be one of sodium bicarbonate, sodium carbonate, azodicarbonamide, azobisisobutyronitrile.
In some embodiments of the present invention, in the step (a), 0.2 to 0.6 part of a cross-linking agent may be further mixed for enhancing heat resistance, flame retardancy, solvent resistance, mechanical strength, electrical properties, and the like of the freshness protection package kit.
Further wherein in step (b) the mixture is heated by an energy heater to impart energy to the melt. It is understood that the energy heater releases negative ions, far infrared rays and energy during heating for absorption by the melt, thereby injecting energy into the melt.
It is worth mentioning that the energy heater is a burner.
Further wherein in step (b) the temperature at which the mixture melts to form the melt ranges from 140 ℃ to 170 ℃. Preferably, the mixture melts to form the melt when the mixture is heated to 170 ℃.
It should be noted that, in some embodiments of the present invention, the mixture may also be heated to form a liquid mixture, which is not limited by the present invention.
Still further wherein in said step (c) the temperature at which the blowing agent in the melt vaporizes ranges from 180 ℃ to 200 ℃. Preferably, when the heating temperature is increased to 200 ℃, the foaming agent in the melt vaporizes, thereby generating gas-filled molecules in the melt, causing the melt to foam and expand.
It is worth mentioning that in the step (d), the melt is cooled by an energy fan to make the melt have energy. Specifically, the energy fan may be provided with the energy material, when the energy fan is powered on, the energy material is excited to generate energy, negative ions, and far infrared rays, and in the process of cooling the melt by the energy fan, the energy, the negative ions, and the far infrared rays released by the energy fan are further injected into the melt, so that the melt has energy.
Further wherein in step (d) the temperature is reduced to 150 ℃ such that the melt is partially contracted and hardened, in particular, such that the gas-filled molecules of the melt are partially contracted and hardened.
Further, wherein in the step (e), the gas introduced is any one of butane, pentane and nitrogen, in terms of weight fraction, wherein 100 parts of butane is introduced in the step (e).
It is worth mentioning that in the step (e), the gas may be introduced into the melt by means of mechanical stirring, physical melting, or chemical reaction.
Further wherein in said step (f) said melt is heated to 105 ℃ at ambient temperature and pressure and said heated melt is extruded through an output device into a free expansion zone to facilitate free expansion of said melt in said free expansion zone. It will be appreciated that, due to the free expansion at room temperature and pressure, the melt does not expand explosively, so as to ensure safety during the production of the freshness protection package kit.
Still further, wherein in the step (g), the melt may be shaped by any one of extrusion, injection, molding, casting, and calendering. Preferably, in this embodiment of the invention, the melt is shaped into a tubular web by means of extrusion.
Finally, wherein in step (h), the freshness package kit is obtained by an activation treatment of the tubular web by the energy material.
It is understood that the freshness protection package kit is produced by using the energy material as a raw material in the embodiment 1 of the present invention, and the freshness protection package kit is produced by activating the shaped melt by using the energy material in the embodiment 2 of the present invention, that is, the steps of the embodiment 2 of the present invention are the same as those of the embodiment 1 of the present invention except for the step of adding the energy material.
It should be understood that the freshness protection package kit of the present invention can be used not only for freshness protection package of fruits and vegetables, but also for freshness protection package of fresh products such as fresh flowers, seafood, fresh meat, etc., and the application of the freshness protection package kit of the present invention is not limited.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.
Claims (46)
1. The preparation method of the freshness protection package kit is characterized by comprising the following steps of:
(a) mixing an energy material, a foaming agent and talcum powder into plastic to obtain a mixture;
(b) heating the mixture to melt to form a melt;
(c) increasing the heating temperature to vaporize the blowing agent in the melt, thereby generating gas-filled molecules in the melt to foam and expand the melt;
(d) reducing the temperature to cause partial shrinkage and hardening of the melt;
(e) introducing a gas into the melt to cause further foaming and expansion of the melt, thereby increasing the strength of the melt;
(f) heating the melt at room temperature and atmospheric pressure and allowing the melt to expand freely; and
(g) after the melt is free to expand, the melt is shaped to form the freshness packaging kit.
2. The method of making a freshness package kit according to claim 1, wherein in the step (a), the energy material is a material made by:
(S1) generating energy by an energy generating device;
(S2) an energy mineral absorbs the energy generated by the energy generating means, releasing negative ions, far infrared rays and energy; and
(S3) an object is subjected to activation treatment of negative ions, far infrared rays and energy released from the energy ore to generate the energy material.
3. The method of making a freshness package kit of claim 2, wherein in said step (a) said energetic material and said plastic produce a resonance effect such that said mixture is activated and energetic.
4. The method of manufacturing a freshness package kit according to claim 1, wherein in the step (a), the mixture is composed of the following raw materials in parts by weight: 1-2 parts of the energy material, 10-12.5 parts of the foaming agent, 1-2 parts of the talcum powder and 500 parts of the plastic.
5. The method for preparing a freshness protection package kit according to claim 1, wherein in the step (a), 0.2 to 0.6 part of a crosslinking agent is mixed.
6. The method of making a freshness package kit of claim 1, wherein in step (a) the plastic is high pressure low density polyethylene.
7. The method of making a freshness package kit of claim 1, wherein in step (a), the foaming agent is one of air, nitrogen, carbon dioxide.
8. The method of manufacturing a freshness packaging kit according to claim 1, wherein in the step (a), the foaming agent is one of sodium bicarbonate, sodium carbonate, azodicarbonamide, azobisisobutyronitrile.
9. The method of manufacturing a freshness packaging kit according to claim 1, wherein in the step (e), the gas is introduced as any one of butane and pentane in terms of weight fraction, wherein 100 parts of the gas is introduced in the step (e).
10. The method of making a freshness package kit of claim 9, wherein in step (e) the gas is introduced into the melt by means of mechanical agitation, physical melting, chemical reaction.
11. The method of making a freshness package kit according to any one of claims 2 to 10, wherein in said step (b), said mixture is heated by an energy heater to impart energy to said melt.
12. The method of making a freshness package kit of claim 11, wherein the energy heater is a burner.
13. The method of making a freshness package kit of claim 12, wherein in step (b) the temperature at which the mixture melts to form the melt ranges from 140 ℃ to 170 ℃.
14. The method of making a freshness package kit of claim 13, wherein in step (c) the temperature at which the foaming agent in the melt vaporizes ranges from 180 ℃ to 200 ℃.
15. The method of manufacturing a freshness packaging kit according to claim 14, wherein in said step (d), said melt is cooled by an energy fan to impart energy to said melt.
16. The method of making a freshness package kit of claim 15, wherein in said step (d), the temperature is reduced to 150 ℃ to cause the melt to partially shrink and harden.
17. The method of making a freshness package kit of claim 16, wherein in step (f), the melt is heated to 105 ℃ to facilitate setting of the melt.
18. The method of manufacturing a freshness package kit according to claim 17, wherein in the step (g), the melt is shaped by any one of extrusion, injection, molding, casting and calendering.
19. The method of making a freshness package kit of claim 18, wherein in step (g), the melt is shaped into a web structure by extrusion or injection to produce a freshness package web.
20. The method of making a freshness packaging kit according to claim 18, wherein in said step (g), said melt is shaped into a film structure by calendering to produce a freshness packaging film.
21. The method of making a freshness package kit of claim 18, wherein in step (g) said melt is shaped into a sleeve-like structure by casting or molding, thereby producing a freshness package.
22. The method of manufacturing a freshness packaging kit according to claim 18, wherein in the step (g), the melt is shaped into a bag-like structure by calendering, thereby producing a freshness packaging bag.
23. The preparation method of the freshness protection package kit is characterized by comprising the following steps of:
(a) mixing a foaming agent and talcum powder into plastic to obtain a mixture;
(b) heating the mixture to melt to form a melt;
(c) increasing the heating temperature to vaporize the blowing agent in the melt, thereby generating gas-filled molecules in the melt to foam and expand the melt;
(d) reducing the temperature to cause partial shrinkage and hardening of the melt;
(e) introducing a gas into the melt to cause further foaming and expansion of the melt, thereby increasing the strength of the melt;
(f) heating the melt at room temperature and atmospheric pressure and allowing the melt to expand freely;
(g) after the melt has expanded freely, shaping the melt, and
(h) and carrying out activation treatment on the shaped melt, thereby generating the freshness-keeping packaging kit.
24. The method of making a freshness package kit of claim 23, wherein in step (h) the melt is activated in an energy bin so that the freshness package kit has energy.
25. The method of claim 23 wherein in step (h) the melt is activated by a resonance effect via an energy material to energize the freshness package kit.
26. The method of making a freshness package kit of claim 25, wherein in step (h), the energy material is a material made by:
(S1) generating energy by an energy generating device;
(S2) an energy mineral absorbs the energy generated by the energy generating means, releasing negative ions, far infrared rays and energy; and
(S3) an object is subjected to activation treatment of negative ions, far infrared rays and energy released from the energy ore to generate the energy material.
27. The method of making a freshness package kit according to claim 23, wherein in said step (a), said mixture consists of the following raw materials in parts by weight: 10-12.5 parts of the foaming agent, 1-2 parts of the talcum powder and 500 parts of the plastic.
28. The method for preparing a freshness protection package kit according to claim 23, wherein in the step (a), 0.2 to 0.6 part of a cross-linking agent is mixed.
29. The method of making a freshness package kit of claim 23, wherein in step (a) the plastic is high pressure low density polyethylene.
30. The method of making a freshness package kit of claim 23, wherein in step (a) the foaming agent is one of air, nitrogen, carbon dioxide, carbon oxides.
31. The method of manufacturing a freshness packaging kit according to claim 23, wherein in the step (a), the foaming agent is one of sodium bicarbonate, sodium carbonate, azodicarbonamide, azobisisobutyronitrile.
32. The method of preparing a freshness package kit according to claim 23, wherein in the step (e), the gas is introduced as any one of butane, pentane, nitrogen, in parts by weight, wherein 100 parts of the gas is introduced in the step (e).
33. The method of making a freshness package kit of claim 32, wherein in step (e) the gas is introduced into the melt by means of mechanical agitation, physical melting, chemical reaction.
34. The method of making a freshness package kit of any one of claims 23 to 33 wherein in step (b) the mixture is heated by an energy heater to impart energy to the melt.
35. The method of making a freshness package kit of claim 34 wherein the energy heater is a burner.
36. The method of making a freshness package kit of claim 35, wherein in step (b) the temperature at which the mixture melts to form the melt ranges from 140 ℃ to 170 ℃.
37. The method of making a freshness package kit of claim 36, wherein in step (c) the temperature at which the foaming agent in the melt vaporizes ranges from 180 ℃ to 200 ℃.
38. The method of making a freshness package kit of claim 37, wherein in step (d) the melt is cooled by an energy fan to impart energy to the melt.
39. The method of making a freshness package kit of claim 38, wherein in step (d) the temperature is reduced to 150 ℃ to cause partial shrinkage and hardening of the melt.
40. The method of making a freshness package kit of claim 39 wherein in step (f) the melt is heated to 105 ℃ to facilitate setting of the melt.
41. The method of making a freshness package kit of claim 40, wherein in said step (g), said melt is shaped by any one of extrusion, injection, molding, casting and calendering.
42. The method of making a freshness package kit of claim 41, wherein in step (g), the melt is shaped into a web structure by extrusion or injection to produce a freshness package web.
43. The method of making a freshness package kit of claim 41, wherein in step (g), the melt is shaped into a film structure by calendering to produce a freshness packaging film.
44. The method of making a freshness package kit of claim 41, wherein in step (g) said melt is shaped into a sleeve-like structure by casting or molding, thereby producing a freshness package.
45. The method of making a freshness package kit of claim 41, wherein in step (g), the melt is shaped into a bag-like structure by calendering, thereby creating a freshness package.
46. A freshness package kit, wherein the freshness package kit is the freshness package kit produced by the method of manufacturing a freshness package kit according to any one of claims 1 to 45.
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| CN201910921943.0A CN110757710A (en) | 2019-09-27 | 2019-09-27 | Fresh-keeping packaging kit and preparation method thereof |
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| CN201910921943.0A CN110757710A (en) | 2019-09-27 | 2019-09-27 | Fresh-keeping packaging kit and preparation method thereof |
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