CN113817249A - Plastic packaging bag and preparation method thereof - Google Patents
Plastic packaging bag and preparation method thereof Download PDFInfo
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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- C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
- C08J2405/04—Alginic acid; Derivatives thereof
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/12—Polypropene
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- C08J2425/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2425/02—Homopolymers or copolymers of hydrocarbons
- C08J2425/04—Homopolymers or copolymers of styrene
- C08J2425/06—Polystyrene
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
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- C08K5/14—Peroxides
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/08—Ingredients agglomerated by treatment with a binding agent
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Abstract
The application relates to the field of plastic packaging, and particularly discloses a plastic packaging bag and a preparation method thereof. A plastic packaging bag is prepared from the following raw materials in parts by weight: 60-80 parts of low-density polyethylene; 10-20 parts of polystyrene; 5-9 parts of polypropylene; 0.5-1.5 parts of dicumyl peroxide; 2-3 parts of bamboo charcoal fiber; 1.5-3.5 parts of a dispersant; 1.8-2.6 parts of a compatilizer; 3-7 parts of a functional assistant; the functional assistant consists of calcium alginate and nano silicon dioxide, and the mass mixing ratio of the calcium alginate to the nano silicon dioxide is (2-5) to 1. The plastic packaging bag has excellent structural strength and good and stable air permeability.
Description
Technical Field
The application relates to the field of plastic packaging, in particular to a plastic packaging bag and a preparation method thereof.
Background
The plastic packaging bag is a packaging bag which takes plastic as a raw material and is used for producing various articles in daily life, and is widely used in daily life and industrial production.
The invention discloses a tear-resistant food packaging bag film and a preparation method thereof in a Chinese invention patent application with the publication number of CN111777813A, wherein the tear-resistant food packaging bag film is prepared from the following raw materials in parts by mass: 45-65 parts of linear high-density polyethylene, 15-25 parts of polybutadiene rubber, 10-15 parts of polypropylene glycol, 7-15 parts of cellulose acetate, 2-3 parts of bamboo charcoal fiber particles, 5-12 parts of bacteriostatic agent, 2-4 parts of anti-aging agent, 2-3 parts of ionic surfactant, 2-3 parts of toughening agent, 1-2 parts of coupling agent, 2-3 parts of polyethylene wax, 1-2 parts of propylene glycol alginate, 1-3 parts of ammonium persulfate and 1-2 parts of glycerol monostearate, and the whole has excellent tear resistance.
In view of the above-mentioned related technologies, the inventor believes that the obtained food packaging bag film needs to exchange air between the inside and the outside of the packaging bag to maintain respiration during the storage process of fruits and vegetables, so as to prolong the storage period of fruits and vegetables, but in the actual development and application process, in order to provide structural strength, it is difficult to ensure the air permeability of the film, and the improvement of the air permeability of the film leads to poor structural strength, so a new scheme needs to be proposed to solve the above-mentioned problems.
Disclosure of Invention
In order to maintain excellent air permeability while ensuring that the packaging bag has good structural strength, the present application provides a plastic packaging bag and a method of manufacturing the same.
In a first aspect, the present application provides a plastic packaging bag, which adopts the following technical scheme:
a plastic packaging bag is prepared from the following raw materials in parts by weight:
60-80 parts of low-density polyethylene;
10-20 parts of polystyrene;
5-9 parts of polypropylene;
0.5-1.5 parts of dicumyl peroxide;
2-3 parts of bamboo charcoal fiber;
1.5-3.5 parts of a dispersant;
1.8-2.6 parts of a compatilizer;
3-7 parts of a functional assistant;
the functional assistant consists of calcium alginate and nano silicon dioxide, and the mass mixing ratio of the calcium alginate to the nano silicon dioxide is (2-5) to 1.
By adopting the technical scheme, the low-density polyethylene, the polystyrene and the polypropylene can form a mixed matrix with stable chemical properties under the action of dicumyl peroxide, and have good bonding property with other components. Calcium alginate in the functional auxiliary agent is a loose three-dimensional porous structure, communicated pores are distributed on the pore wall, when the functional auxiliary agent is mixed with nano silicon dioxide for use, on one hand, adverse effects caused by more pore diameters of the calcium alginate on the whole structure of the plastic packaging bag can be reduced, the tightness of combination among raw materials of each component can be ensured, on the other hand, the calcium alginate can interact with the microporous structure on the surface of the bamboo charcoal fiber, the integral structural strength of the plastic packaging bag can be ensured, and the plastic packaging bag has good and stable air permeability.
Preferably, the mass mixing ratio of the calcium alginate to the nano silicon dioxide is 3: 1.
By adopting the technical scheme, the calcium alginate and the nano silicon dioxide in the proportion are favorable for ensuring that the plastic packaging bag keeps excellent structural strength and air permeability after the functional auxiliary agent is applied.
Preferably, 2-3 parts of synergistic auxiliary is added into the raw materials of the plastic packaging bag, the synergistic auxiliary is composed of bentonite and montmorillonite, and the mass mixing ratio of the bentonite and the montmorillonite is (1.3-1.7): 1.
By adopting the technical scheme, the synergistic additive consisting of bentonite and montmorillonite can utilize the adsorbability of the synergistic additive to improve the binding force among the components, further improve the integral structural strength of the plastic packaging bag, and simultaneously utilize the microporous structure of the synergistic additive to improve the integral air permeability of the plastic packaging bag. Meanwhile, in the mixed use process, part of the synergistic auxiliary agent can be filled in the aperture of the calcium alginate, and then the synergistic auxiliary agent absorbs the moisture generated by the respiration of the fruits and vegetables, so that the air permeability of the plastic packaging bag is gradually reduced along with the attenuation of the respiration of the fruits and vegetables, the preservation period of the fruits and vegetables in the plastic packaging bag is not influenced, the plastic packaging bag can be prevented from accumulating to generate more water drops, and the plastic packaging bag has excellent use effect as a whole.
Preferably, the mass mixing ratio of the bentonite and the montmorillonite is 1.5: 1.
By adopting the technical scheme, the synergistic additive formed by mixing the bentonite and the montmorillonite in the proportion has the most excellent application effect.
Preferably, the bentonite is modified, and the method specifically comprises the following steps:
(1) preparing a modifier: taking the components in a mass ratio of (1.1-1.5): (0.1-0.3): 1, adding water to the vinyltrimethoxysilane, the sodium dodecyl sulfate and the polyhydroxyalkanoate, and fully mixing to obtain a modifier;
(2) mixing modification: the modifier and the bentonite in the step (1) are mixed according to the mass ratio of (0.5-0.8): 1, fully mixing, and then drying to obtain the modified bentonite.
By adopting the technical scheme, the modifier obtained by mixing the vinyltrimethoxysilane, the lauryl sodium sulfate and the polyhydroxyalkanoate can play a good role in modifying the surface of the bentonite, and is favorable for improving the bonding strength between the bentonite and the mixed matrix. However, the conventional surface modification can block micropores on the surface of the bentonite, but gas molecules are not easy to permeate, and the applicant finds that the integral air permeability of the plastic packaging bag can be effectively ensured by introducing the sodium dodecyl sulfate and the polyhydroxyalkanoate in the application process of the vinyltrimethoxysilane, and probably the modifier is difficult to form a film at the micropores of the bentonite and is difficult to fill the micropores due to capillary action.
Preferably, in the step (1), the mass ratio of the vinyltrimethoxysilane to the sodium dodecyl sulfate to the polyhydroxyalkanoate is 1.2: 0.2: 1.
by adopting the technical scheme, the modifier consisting of the vinyltrimethoxysilane, the sodium dodecyl sulfate and the polyhydroxyalkanoate in the proportion can keep the most excellent application effect of the modified bentonite.
Preferably, in the step (2), the modifier and the bentonite are mixed according to a mass ratio of 0.7: 1.
through adopting above-mentioned technical scheme, modifier and bentonite of above-mentioned mass ratio mix more evenly each other, not only make the bentonite surface can contact the modifier completely and fully function, can also reduce and lead to bringing adverse effect for follow-up plastic packaging bag's performance because of the modifier is excessive, and then make the modifier can play excellent modification effect to the bentonite surface.
In a second aspect, the present application provides a method for preparing a plastic packaging bag, which adopts the following technical scheme:
a preparation method of a plastic packaging bag comprises the following steps:
(1) preparing raw materials comprising low-density polyethylene, polystyrene, polypropylene, dicumyl peroxide, bamboo charcoal fiber, a dispersing agent, a compatilizer and a functional auxiliary agent according to a ratio;
(2) mixing the low-density polyethylene, the polystyrene, the polypropylene, the dicumyl peroxide, the bamboo charcoal fiber, the dispersing agent, the compatilizer and the functional auxiliary agent in the step (1), drying, and performing blow molding on the mixed raw materials to form a film material;
(3) and (3) cooling and pressing the film material in the step (2), and then placing the film material in a bag making machine for making a bag to obtain the plastic packaging bag.
Through adopting above-mentioned technical scheme, mix each component raw materials and dry, can get rid of moisture on the one hand, be that the raw materials keeps dry, on the other hand can make the raw materials have higher initial temperature before being blown the film, and then can be in the mutual sufficient effect of blowing in-process, obtain the membrane material that the quality is stable excellent, and then guaranteed the whole quality of plastic packaging bag.
In a third aspect, the present application provides a plastic packaging bag, which adopts the following technical scheme:
a preparation method of a plastic packaging bag comprises the following steps:
(1) preparing raw materials comprising low-density polyethylene, polystyrene, polypropylene, dicumyl peroxide, bamboo charcoal fiber, a dispersing agent, a compatilizer, a functional assistant and a synergistic assistant according to a ratio;
(2) mixing the low-density polyethylene, the polystyrene, the polypropylene, the dicumyl peroxide, the bamboo charcoal fiber, the dispersing agent, the compatilizer, the functional additive and the synergistic additive in the step (1), drying, and performing blow molding on the mixed raw materials to form a film material;
(3) and (3) cooling and pressing the film material in the step (2), and then placing the film material in a bag making machine for making a bag to obtain the plastic packaging bag.
By adopting the technical scheme, the synergistic auxiliary is mixed with other raw materials, then the mixture is dried, blown into a film and processed to obtain the plastic packaging bag, so that the synergistic auxiliary is simple and convenient to apply, plays a stable role and effect, and the plastic packaging bag with excellent and stable quality is obtained.
In summary, the present application has the following beneficial effects:
1. due to the adoption of the functional auxiliary agent comprising the calcium alginate and the nano silicon dioxide, the tightness of combination of raw materials of all components can be ensured, the integral structural strength of the plastic packaging bag is improved, and the plastic packaging bag has good and stable air permeability;
2. the synergistic auxiliary agent consisting of bentonite and montmorillonite is preferably adopted in the application, so that the integral structural strength and air permeability of the plastic packaging bag can be improved, meanwhile, the air permeability of the plastic packaging bag is gradually reduced along with the attenuation of the respiration of fruits and vegetables, the preservation period of the fruits and vegetables in the plastic packaging bag is not influenced, the plastic packaging bag is not easy to accumulate to generate more water drops, and the integral plastic packaging bag has an excellent use effect;
3. the modifier obtained by mixing the alkenyl trimethoxy silane, the lauryl sodium sulfate and the polyhydroxyalkanoate is used for modifying the bentonite, so that the bonding strength between the bentonite and the mixed matrix is improved, and the integral air permeability of the plastic packaging bag can be effectively ensured.
Detailed Description
The present application will be described in further detail with reference to examples.
The starting materials and equipment used in the examples of the present application are commercially available, except as specifically described below:
examples of preparation of raw materials and/or intermediates
Preparation example 1
(1) Preparing a modifier: taking the mass ratio of 1.2: 0.2: 1, adding 5 times of water into vinyltrimethoxysilane, sodium dodecyl sulfate and polyhydroxyalkanoate, and fully mixing to obtain a modifier;
(2) mixing modification: and (2) mixing the modifier and bentonite in the step (1) according to a mass ratio of 0.7: 1, fully mixing, and then drying to obtain the modified bentonite.
Preparation example 2
The modified bentonite is different from the bentonite prepared in the preparation example 1 in that in the step (1), the mass ratio of the vinyl trimethoxy silane to the sodium dodecyl sulfate to the polyhydroxyalkanoate is 1.1: 0.1: 1.
preparation example 3
The modified bentonite is different from the bentonite prepared in the preparation example 1 in that in the step (1), the mass ratio of the vinyl trimethoxy silane to the sodium dodecyl sulfate to the polyhydroxyalkanoate is 1.5: 0.3: 1.
preparation example 4
The modified bentonite is different from the bentonite prepared in the preparation example 1 in that in the step (1), the mass ratio of the vinyl trimethoxy silane to the sodium dodecyl sulfate to the polyhydroxyalkanoate is 1.3: 0.2: 1.
preparation example 5
The modified bentonite is different from the bentonite prepared in preparation example 1 in that in the step (2), the mass ratio of the modifier to the bentonite is 0.5: 1.
preparation example 6
The modified bentonite is different from the bentonite prepared in preparation example 1 in that in the step (2), the mass ratio of the modifier to the bentonite is 0.8: 1.
preparation example 7
The modified bentonite is different from the bentonite prepared in preparation example 1 in that in the step (2), the mass ratio of the modifier to the bentonite is 0.65: 1.
examples
Example 1
The plastic packaging bag comprises the following components in parts by weight as shown in Table 1, and is prepared by the following steps:
(1) preparing raw materials comprising low-density polyethylene, polystyrene, polypropylene, dicumyl peroxide, bamboo charcoal fiber, a dispersing agent, a compatilizer and a functional auxiliary agent according to a ratio;
(2) mixing the low-density polyethylene, the polystyrene, the polypropylene, the dicumyl peroxide, the bamboo charcoal fiber, the dispersing agent, the compatilizer and the functional auxiliary agent in the step (1), drying, and blow-molding the mixed raw materials into a film, wherein the film blowing temperature is 170 ℃, so as to obtain a film material;
(3) and (3) cooling and edge pressing the film material in the step (2) by using a film press, and then placing the film material in a bag making machine for making a bag to obtain the plastic packaging bag.
Note: the functional assistant consists of calcium alginate and nano silicon dioxide, and the mass mixing ratio of the calcium alginate to the nano silicon dioxide is 3.5: 1.
Examples 2 to 3
A plastic packaging bag, which is different from example 1 in that each component and corresponding parts by weight thereof are shown in table 1.
TABLE 1 Components and parts by weight (kg/part) of the components of examples 1-3
| Components | Example 1 | Example 2 | Example 3 |
| Low density polyethylene | 60 | 70 | 80 |
| Polystyrene | 10 | 15 | 20 |
| Polypropylene | 5 | 7 | 9 |
| Dicumyl peroxide | 0.5 | 1.0 | 1.5 |
| Bamboo charcoal fiber | 2 | 2.5 | 3 |
| Dispersing agent | 1.5 | 2.5 | 3.5 |
| Compatilizer | 1.8 | 2.2 | 2.6 |
| Functional auxiliary agent | 3 | 5 | 7 |
Example 4
A plastic packaging bag is different from the plastic packaging bag in the embodiment 1 in that a functional auxiliary agent is composed of calcium alginate and nano-silica, and the mass mixing ratio of the calcium alginate to the nano-silica is 2: 1.
Example 5
A plastic packaging bag is different from the plastic packaging bag in the embodiment 1 in that a functional auxiliary agent is composed of calcium alginate and nano-silica, and the mass mixing ratio of the calcium alginate to the nano-silica is 5: 1.
Example 6
A plastic packaging bag is different from the plastic packaging bag in the embodiment 1 in that a functional auxiliary agent is composed of calcium alginate and nano-silica, and the mass mixing ratio of the calcium alginate to the nano-silica is 3: 1.
Example 7
A plastic packaging bag is different from the plastic packaging bag in the embodiment 1 in that 2.5 parts of synergistic auxiliary agent is added into the raw materials of the plastic packaging bag and is mixed with the raw materials in the step (2) for use, wherein the synergistic auxiliary agent is composed of bentonite and montmorillonite, and the mass mixing ratio of the bentonite and the montmorillonite is 1.5: 1.
Example 8
A plastic packaging bag is different from that of example 1 in that 2 parts of a synergist is added.
Example 9
A plastic packaging bag is different from that of example 1 in that the amount of the synergist is 3 parts.
Example 10
A plastic packaging bag is different from the plastic packaging bag in the embodiment 1 in that the mass mixing ratio of bentonite and montmorillonite in a synergistic agent is 1.3: 1.
Example 11
A plastic packaging bag is different from the plastic packaging bag in the embodiment 1 in that the mass mixing ratio of bentonite and montmorillonite in a synergistic agent is 1.7: 1.
Example 12
A plastic packaging bag is different from the plastic packaging bag in example 7 in that the bentonite and the like in the synergistic agent are replaced by the modified bentonite in preparation example 1.
Example 13
A plastic packaging bag is different from the plastic packaging bag in example 7 in that the bentonite and the like in the synergistic agent are replaced by the modified bentonite in preparation example 2.
Example 14
A plastic packaging bag is different from example 7 in that the bentonite and the like in the synergistic agent are replaced by the modified bentonite in preparation example 3.
Example 15
A plastic packaging bag is different from example 7 in that the bentonite and the like in the synergistic agent are replaced by the modified bentonite in preparation example 4.
Example 16
A plastic packaging bag is different from example 7 in that the bentonite and the like in the synergistic agent are replaced by the modified bentonite in preparation example 5.
Example 17
A plastic packaging bag, which is different from example 7 in that the bentonite and the like in the synergistic agent are replaced by the modified bentonite in preparation example 6.
Example 18
A plastic packaging bag is different from example 7 in that the bentonite and the like in the synergistic agent are replaced by the modified bentonite in preparation example 7.
Comparative example
Comparative example 1
A plastic packaging bag, which is different from the plastic packaging bag in the embodiment 1 in that the functional auxiliary agent is calcium alginate.
Comparative example 2
The plastic packaging bag is different from the plastic packaging bag in the embodiment 1 in that the functional auxiliary agent is nano silicon dioxide.
Comparative example 3
A plastic packaging bag is different from the plastic packaging bag in the embodiment 1 in that functional additives are not added in the raw materials of the plastic packaging bag.
Comparative example 4
A plastic packaging bag, which differs from example 7 in that the synergist is bentonite.
Comparative example 5
A plastic packaging bag, which differs from example 7 in that the builder is montmorillonite.
Performance testing test samples: the plastic packaging bags obtained in examples 1 to 18 were used as test samples 1 to 18, the plastic packaging bags obtained in comparative examples 1 to 5 were used as control samples 1 to 5, and the bag thickness was 0.06 mm.
The test method comprises the following steps: (1) and (3) testing tensile strength: cutting the plastic packaging bag into strips of 15mm multiplied by 120mm, setting the clamping distance of a computer measurement and control tensile testing machine to be 50mm according to the content in ASTM D882-2009, setting the tensile rate to be 300mm/min, the ambient temperature to be 25 ℃, the relative humidity to be 60%, testing each sample for eight times, and taking an average value.
(2) Oxygen transmission performance test: the oxygen permeability of the films was determined according to GB/T1038-3/cm2·24h·0.1Mpa)。
(3) Testing the preservation performance: loading mango (seventy percent mature) growing at the same age into plastic packaging bags in a test sample 1-18 and a control sample 1-5 every 0.5 jin respectively, simultaneously putting 3 g of potassium permanganate packaged by a paper bag as an ethylene absorbent, sealing the bag opening, placing in a thermostatic chamber at 25 ℃, controlling the relative humidity to be 50% until black spots appear on the surfaces of the mangoes, recording the corresponding time length, testing each sample for 3 times, and averaging; and collecting and weighing the water drops attached in the bag, and correspondingly recording.
TABLE 2 test results of test samples 1-18 and control samples 1-5
It can be seen from the combination of examples 1-6 and comparative examples 1-3 and table 2 that the use of functional additives comprising calcium alginate and nano-silica, which are compounded with each other, can improve the overall structural strength of the plastic packaging bag, can also make the plastic packaging bag have good and stable air permeability, and can prolong the preservation period of fruits and vegetables, wherein the calcium alginate and the nano-silica have the most excellent effect when the mass mixing ratio is 3:1,
it can be seen from the combination of examples 7-11 and table 2 that the synergistic additive comprising bentonite and montmorillonite can not only improve the structural strength and air permeability of the whole plastic packaging bag, but also prevent the plastic packaging bag from accumulating and generating more water drops, so that the whole plastic packaging bag has excellent use effect. Further combining with comparative examples 4-5 and combining with table 2, it can be seen that when bentonite or montmorillonite is used alone as a functional aid, the effect is much better than the effect of the two when they are used in combination.
It can be seen from the combination of examples 12-18 and table 2 that the modification of bentonite with the modifier obtained by mixing the alkenyltrimethoxysilane, the sodium dodecyl sulfate and the polyhydroxyalkanoate is not only beneficial to improving the bonding strength between the bentonite and the mixed matrix, but also can effectively ensure the integral air permeability of the plastic packaging bag; wherein the mass ratio of the vinyltrimethoxysilane to the sodium dodecyl sulfate to the polyhydroxyalkanoate is controlled to be 1.2: 0.2: 1, and enabling the modifier and bentonite to be mixed according to a mass ratio of 0.7: 1, the modification efficiency as a whole is most excellent.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The plastic packaging bag is characterized by being prepared from the following raw materials in parts by weight:
60-80 parts of low-density polyethylene;
10-20 parts of polystyrene;
5-9 parts of polypropylene;
0.5-1.5 parts of dicumyl peroxide;
2-3 parts of bamboo charcoal fiber;
1.5-3.5 parts of a dispersant;
1.8-2.6 parts of a compatilizer;
3-7 parts of a functional assistant;
the functional assistant consists of calcium alginate and nano silicon dioxide, and the mass mixing ratio of the calcium alginate to the nano silicon dioxide is (2-5) to 1.
2. A plastic package according to claim 1 wherein: the mass mixing ratio of the calcium alginate to the nano silicon dioxide is 3: 1.
3. A plastic package according to claim 1 wherein: 2-3 parts of synergistic auxiliary agent is also added into the raw materials of the plastic packaging bag, the synergistic auxiliary agent is composed of bentonite and montmorillonite, and the mass mixing ratio of the bentonite and the montmorillonite is (1.3-1.7): 1.
4. A plastic packing bag according to claim 3, wherein: the mass mixing ratio of the bentonite to the montmorillonite is 1.5: 1.
5. A plastic packing bag according to claim 3, wherein: the bentonite is subjected to modification treatment, and the method specifically comprises the following steps:
(1) preparing a modifier: taking the components in a mass ratio of (1.1-1.5): (0.1-0.3): 1, adding water to the vinyltrimethoxysilane, the sodium dodecyl sulfate and the polyhydroxyalkanoate, and fully mixing to obtain a modifier;
(2) mixing modification: the modifier and the bentonite in the step (1) are mixed according to the mass ratio of (0.5-0.8): 1, fully mixing, and then drying to obtain the modified bentonite.
6. The plastic packing bag as claimed in claim 5, wherein: in the step (1), the mass ratio of the vinyltrimethoxysilane to the sodium dodecyl sulfate to the polyhydroxyalkanoate is 1.2: 0.2: 1.
7. the plastic packing bag as claimed in claim 5, wherein: in the step (2), the modifier and the bentonite are mixed according to a mass ratio of 0.7: 1.
8. the method for preparing a plastic packing bag according to any one of claims 1-2, comprising the steps of:
(1) preparing raw materials comprising low-density polyethylene, polystyrene, polypropylene, dicumyl peroxide, bamboo charcoal fiber, a dispersing agent, a compatilizer and a functional auxiliary agent according to a ratio;
(2) mixing the low-density polyethylene, the polystyrene, the polypropylene, the dicumyl peroxide, the bamboo charcoal fiber, the dispersing agent, the compatilizer and the functional auxiliary agent in the step (1), drying, and performing blow molding on the mixed raw materials to form a film material;
(3) and (3) cooling and pressing the film material in the step (2), and then placing the film material in a bag making machine for making a bag to obtain the plastic packaging bag.
9. The method for preparing a plastic packing bag according to any one of claims 3 to 7, comprising the steps of:
(1) preparing raw materials comprising low-density polyethylene, polystyrene, polypropylene, dicumyl peroxide, bamboo charcoal fiber, a dispersing agent, a compatilizer, a functional assistant and a synergistic assistant according to a ratio;
(2) mixing the low-density polyethylene, the polystyrene, the polypropylene, the dicumyl peroxide, the bamboo charcoal fiber, the dispersing agent, the compatilizer, the functional additive and the synergistic additive in the step (1), drying, and performing blow molding on the mixed raw materials to form a film material;
(3) and (3) cooling and pressing the film material in the step (2), and then placing the film material in a bag making machine for making a bag to obtain the plastic packaging bag.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101228900A (en) * | 2008-01-22 | 2008-07-30 | 浙江省农业科学院 | Fresh-keeping bag specially for white mushroom |
| CN107446208A (en) * | 2017-07-03 | 2017-12-08 | 中传联合（北京）国际传媒有限公司 | Antibacterial food packaging film |
| CN107778606A (en) * | 2017-11-10 | 2018-03-09 | 桐城市强峰包装有限公司 | A kind of high tenacity decomposable asymmetric choice net environmentally-friendly plastic packaging bag |
| CN109081991A (en) * | 2018-08-10 | 2018-12-25 | 安徽国泰印务有限公司 | A kind of fresh-keeping plastic packaging bag of food-level antibacterial |
| CN109264167A (en) * | 2018-09-14 | 2019-01-25 | 安徽同利塑胶彩印有限公司 | A kind of freshness protection package being exclusively used in fruit refrigeration |
| CN109867849A (en) * | 2019-02-15 | 2019-06-11 | 江苏莱顿博瑞生物科技有限公司 | A kind of air-adjustable fresh-keeping bag and preparation method thereof for dragon fruit |
| CN111944220A (en) * | 2020-07-20 | 2020-11-17 | 西安海宏保鲜科技有限责任公司 | Breathable waterproof plastic film and application thereof |
-
2021
- 2021-09-18 CN CN202111113282.2A patent/CN113817249A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101228900A (en) * | 2008-01-22 | 2008-07-30 | 浙江省农业科学院 | Fresh-keeping bag specially for white mushroom |
| CN107446208A (en) * | 2017-07-03 | 2017-12-08 | 中传联合（北京）国际传媒有限公司 | Antibacterial food packaging film |
| CN107778606A (en) * | 2017-11-10 | 2018-03-09 | 桐城市强峰包装有限公司 | A kind of high tenacity decomposable asymmetric choice net environmentally-friendly plastic packaging bag |
| CN109081991A (en) * | 2018-08-10 | 2018-12-25 | 安徽国泰印务有限公司 | A kind of fresh-keeping plastic packaging bag of food-level antibacterial |
| CN109264167A (en) * | 2018-09-14 | 2019-01-25 | 安徽同利塑胶彩印有限公司 | A kind of freshness protection package being exclusively used in fruit refrigeration |
| CN109867849A (en) * | 2019-02-15 | 2019-06-11 | 江苏莱顿博瑞生物科技有限公司 | A kind of air-adjustable fresh-keeping bag and preparation method thereof for dragon fruit |
| CN111944220A (en) * | 2020-07-20 | 2020-11-17 | 西安海宏保鲜科技有限责任公司 | Breathable waterproof plastic film and application thereof |
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