CN113789007B

CN113789007B - Antibacterial deodorizing polypropylene material and preparation method and application thereof

Info

Publication number: CN113789007B
Application number: CN202111029145.0A
Authority: CN
Inventors: 俞凌晨
Original assignee: Ningbo Jiangyong Plastic Technology Co ltd
Current assignee: Ningbo Jiangyong Plastic Technology Co ltd
Priority date: 2021-07-24
Filing date: 2021-09-02
Publication date: 2023-06-13
Anticipated expiration: 2041-09-02
Also published as: CN113789007A

Abstract

The application relates to the technical field of cooked food packaging raw materials, in particular to an antibacterial deodorizing polypropylene material and a preparation method and application thereof. The antibacterial deodorizing polypropylene material is prepared from the following raw materials in parts by weight: 40-90 parts of polypropylene resin, 4-16 parts of compatilizer and 4-16 parts of fiber material, wherein the fiber material is one or a mixture of more of activated carbon fiber, chitin fiber and bamboo fiber. The preparation method of the antibacterial deodorizing polypropylene material comprises the following steps: (1) preparing a polypropylene mixed raw material; (2) preparing antibacterial deodorizing polypropylene master batches; (3) preparing antibacterial deodorizing polypropylene. The antibacterial and deodorant polypropylene material and the preparation method thereof have the effect of reducing the influence on the taste of cooked food.

Description

Antibacterial deodorizing polypropylene material and preparation method and application thereof

Technical Field

The application relates to the technical field of cooked food packaging raw materials, in particular to an antibacterial deodorizing polypropylene material and a preparation method and application thereof.

Background

Polypropylene is a colorless, odorless, nontoxic, translucent solid substance. Polypropylene is a thermoplastic synthetic resin with excellent properties, such as chemical resistance, heat resistance, electrical insulation, high strength mechanical properties, high wear resistance, etc., and is widely used in various fields such as machinery, automobiles, electronic appliances, construction, textile, packaging, agriculture, forestry, fishery, food industry, etc.

In the related art, the conventional method for preparing the disposable polypropylene packaging box comprises the following steps: (1) drying the polypropylene resin; (2) Mixing polypropylene resin with color master batch to obtain a mixed material; (3) Extruding and granulating the mixed material to obtain mixed granules; (4) And (5) carrying out injection molding on the mixed granules to obtain the polypropylene packaging box.

In view of the above-mentioned related art, the inventors believe that although polypropylene has the advantages of being colorless, odorless and nontoxic, when the polypropylene packaging box stores cooked foods for a long period of time, the odor of the cooked foods spoiled and the irritating gas emitted from the polypropylene resin due to heating are liable to be mixed in the packaging box, and there is a disadvantage that the above-mentioned polypropylene packaging box is liable to affect the taste of the cooked foods.

Disclosure of Invention

In order to solve the problem that the disposable polypropylene packaging box is easy to influence the taste of cooked food, the application provides an antibacterial deodorizing polypropylene material, and a preparation method and application thereof.

In a first aspect, the present application provides an antibacterial deodorizing polypropylene material, which adopts the following technical scheme:

an antibacterial deodorizing polypropylene material is prepared from the following raw materials in parts by weight: 40-90 parts of polypropylene resin, 4-16 parts of compatilizer and 4-16 parts of fiber material, wherein the fiber material is one or a mixture of more of activated carbon fiber, chitin fiber and bamboo fiber.

By adopting the technical scheme, the activated carbon fiber, the chitin fiber or the bamboo fiber with the proportion is used as the fiber material to be added into the polypropylene, and the antibacterial and deodorizing polypropylene material is promoted to obtain the antibacterial and deodorizing effects by the antibacterial and adsorbing effects of the activated carbon fiber, the chitin fiber and the bamboo fiber, so that the influence of the polypropylene resin on the taste of cooked food is effectively reduced.

In addition, as the fiber materials such as the activated carbon fiber, the chitin fiber and the bamboo fiber are all fiber-shaped, the fiber materials can be further promoted to give the antibacterial and deodorant polypropylene material toughening effect, the possibility of breakage and damage of the antibacterial and deodorant polypropylene material is further reduced, and the service time of the antibacterial and deodorant polypropylene material is effectively prolonged.

Preferably, the material is prepared from the following raw materials in parts by weight: 55-75 parts of polypropylene resin, 8-16 parts of compatilizer and 8-12 parts of fiber material.

By adopting the technical scheme, the compatilizer and the fiber material with the proportion are mixed with the polypropylene resin, so that the fiber material can be more uniformly distributed into the polypropylene resin through the compatilizer, the antibacterial deodorizing polypropylene material is further improved to obtain the antibacterial and deodorizing effects, and the influence of the polypropylene resin on the taste of cooked food is effectively reduced.

Preferably, the fiber material is a mixture of activated carbon fiber and chitin fiber, and the weight ratio of the activated carbon fiber to the chitin fiber is 3:1.

By adopting the technical scheme, the fiber material is composed of the active carbon fiber and the chitin fiber in the proportion, so that the antibacterial deodorizing polypropylene material is further improved to obtain antibacterial and deodorizing effects by the synergistic effect of the active carbon fiber and the chitin fiber, and the influence of the polypropylene resin on the taste of cooked food is effectively reduced.

Preferably, the antibacterial additive comprises 4-16 parts by weight of antibacterial additives, wherein the antibacterial additives are one or a mixture of more of honeysuckle powder, dandelion powder and purslane powder.

By adopting the technical scheme, as the honeysuckle powder, the dandelion powder and the purslane powder with the proportion are used as antibacterial additives to be added into the antibacterial deodorizing polypropylene material, the antibacterial deodorizing polypropylene material is further improved in antibacterial and deodorizing effects by the antibacterial sterilizing effects of the honeysuckle powder, the dandelion powder and the purslane powder, and the influence of the polypropylene resin on the taste of cooked food is effectively reduced.

Preferably, the antibacterial additive is a mixture of honeysuckle powder and purslane powder, and the weight ratio of the honeysuckle powder to the purslane powder is 2:1.

By adopting the technical scheme, the antibacterial additive consists of the honeysuckle powder and the purslane powder in the proportion, so that the antibacterial deodorizing polypropylene material is further improved to obtain antibacterial and deodorizing effects through the synergistic effect of the honeysuckle powder and the purslane powder, and the influence of the polypropylene resin on the taste of cooked food is effectively reduced.

Preferably, the particle size of the antibacterial additive is between 200 and 400 meshes.

By adopting the technical scheme, the antibacterial additive with the particle size is mixed with the polypropylene resin, so that the antibacterial additive can be more uniformly distributed in the antibacterial deodorizing polypropylene material, the antibacterial deodorizing polypropylene material is promoted to obtain antibacterial and deodorizing effects, and the influence of the polypropylene resin on the taste of cooked food is effectively reduced.

In a second aspect, the present application provides a method for preparing an antibacterial and deodorant polypropylene material, which adopts the following technical scheme:

the preparation method of the antibacterial deodorizing polypropylene material comprises the following steps:

step one, mixing and drying polypropylene resin, a compatilizer and a fiber material to obtain a polypropylene mixed raw material;

and step two, extruding and molding the polypropylene mixed raw material to obtain the antibacterial deodorizing polypropylene material.

By adopting the technical scheme, in the first step, the polypropylene resin, the compatilizer and the fiber material are mixed, so that the fiber material can be more uniformly distributed in the antibacterial deodorizing polypropylene material, the antibacterial deodorizing polypropylene material is effectively improved to obtain antibacterial and deodorizing effects, and the influence of the polypropylene resin on the taste of cooked food is effectively reduced.

In addition, in the first step, the polypropylene resin, the compatilizer and the fiber material are dried, so that the influence of a small amount of water vapor entering the antibacterial deodorizing polypropylene material in the melting process on cooked food is reduced, and the antibacterial and deodorizing effects of the high antibacterial deodorizing polypropylene material are obtained indirectly.

Preferably, in the second step, after the antibacterial and deodorant polypropylene master batch is injection molded, the molded product is annealed at the melting point.

By adopting the technical scheme, the annealing treatment is further carried out in the third step, so that incomplete microcrystals in the antibacterial deodorizing polypropylene material are promoted to be melted at low temperature, and then the material is cooled again, so that the arrangement of chain segments is adjusted to lead the crystallization structure to be uniform, the orientation distribution of an amorphous region and a crystalline region of the material is effectively controlled in the crystallization-direction-recrystallization process, the antibacterial deodorizing polypropylene material is promoted to obtain a microporous structure, the air permeability of the antibacterial deodorizing polypropylene material is effectively improved, and the deodorizing effect of the antibacterial deodorizing polypropylene material is indirectly improved.

In a third aspect, the application provides an application of an antibacterial deodorizing polypropylene material, which adopts the following technical scheme:

an antibacterial deodorizing polypropylene material, which can be applied to cooked food packaging.

By adopting the technical scheme, the antibacterial deodorizing polypropylene material is adopted to prepare the cooked food package, so that the influence of the cooked food package on the taste of the cooked food is effectively reduced by the antibacterial deodorizing polypropylene material.

In summary, the present application has the following beneficial effects:

1. because the activated carbon fiber, the chitin fiber or the bamboo fiber is used as the fiber material to be added into the polyethylene, the antibacterial deodorizing polypropylene material is promoted to obtain antibacterial and deodorizing effects, and the influence of the polypropylene resin on the taste of cooked food is effectively reduced;

2. in the application, as the fiber materials such as the activated carbon fiber, the chitin fiber and the bamboo fiber are all fibrous, the fiber materials can be further promoted to give a toughening effect to the antibacterial deodorizing polypropylene material, and the service time of the antibacterial deodorizing polypropylene material is effectively prolonged;

3. according to the method, the antibacterial and deodorizing polypropylene material is promoted to obtain a microporous structure through annealing treatment, so that the air permeability of the antibacterial and deodorizing polypropylene material is effectively improved, and the deodorizing effect of the antibacterial and deodorizing polypropylene material is indirectly improved.

Drawings

Fig. 1 is a schematic structural view of one of the packages provided in the present application.

Fig. 2 is a schematic structural view of another package provided in the present application.

Detailed Description

The present application is described in further detail below in conjunction with fig. 1, 2, examples and comparative examples.

Referring to fig. 1 and 2, two types of packages disclosed in the present application are the same in material and manufacturing method, and therefore only the manufacturing method of the package of fig. 1 will be described below.

Raw materials and raw Material preparation examples

The raw material components in the application are shown in table 1:

TABLE 1 sources of the raw material components

Raw materials	Manufacturer' s	Specification of specification
			Polypropylene resin	Shanghai Ian Chemical Technology Co.,Ltd.	Product number: r033079
Maleic anhydride grafted polypropylene	Sigma Aldrich trade Co Ltd	Product number: 427845
			Activated carbon fiber	Nantongsen friend carbon fiber Co Ltd	Model: SY-ACF-1001
Chitin fiber	Jin Jinle chemical Co., ltd	CAS：52519-63-8
			Bamboo fiber	Yubang textile Co.Ltd in Fangfang City	Model: yubang B16S
Dandelion	Yihongtang pharmaceutical Co Ltd	/
			Honeysuckle	Qingzhou city Sanjiang flower and plant cooperation	/
Purslane (Portulaca oleracea L.) L	Chen Feng Chinese medicinal plant planting cooperation in Bozhou city	/

Preparation example 1

A dandelion powder is prepared by the following steps:

AS1, cleaning dandelion, cutting the dandelion into small sections with the length of about 5mm, and then placing the small sections in an oven at 300 ℃ for drying for 2 hours to obtain dandelion dry materials;

AS2, steaming the dandelion dried material in a steamer for 15min, taking out and naturally cooling, and crushing and sieving the dandelion dried material by a crusher to obtain dandelion pretreatment powder with the particle size of 200 meshes;

AS3, parching herba Taraxaci pretreatment powder at 900 deg.C for 15min, and cooling to obtain herba Taraxaci powder.

Preparation example 2

The difference from preparation example 1 is that the particle size of the dandelion pretreatment powder in S2 is 300 mesh.

Preparation example 3

The difference from preparation example 1 is that the particle size of the dandelion pretreatment powder in S2 is 400 mesh.

Preparation example 4

The honeysuckle powder adopts the following preparation method:

BS1, cleaning and cutting honeysuckle into small sections with the length of about 5mm, and then placing the small sections in an oven at 300 ℃ for drying for 2 hours to obtain a honeysuckle dry material;

BS2, placing the dried honeysuckle materials in a steamer for steaming for 15min, then taking out and naturally cooling, and then crushing and sieving the dried honeysuckle materials through a crusher to obtain pretreated honeysuckle powder with the particle size of 300 meshes;

BS3, parching the honeysuckle pretreatment powder at 900 ℃ for 15min, and then cooling to obtain the honeysuckle powder.

Preparation example 5

A purslane powder is prepared by the following steps:

CS1, cleaning purslane, cutting the purslane into small sections with the length of about 5mm, and then placing the sections in an oven at 300 ℃ for drying for 2 hours to obtain dry purslane;

CS2, steaming the dried purslane in a steamer for 15min, taking out and naturally cooling, and crushing and sieving the dried purslane by a crusher to obtain a purslane pretreatment powder with the particle size of 300 meshes;

CS3, parching herba Portulacae pretreated powder at 900 deg.C for 15min, and cooling to obtain herba Portulacae powder.

Examples

Example 1

An antibacterial deodorizing polypropylene material is prepared by the following steps:

step one, stirring 65kg of polypropylene resin, 10kg of compatilizer maleic anhydride grafted polypropylene and 10kg of activated carbon fiber for 30min at a stirring speed of 500r/min to obtain a polypropylene mixed raw material;

and secondly, placing the polypropylene mixed raw material into an extruder for extrusion granulation to obtain the antibacterial deodorizing polypropylene material.

Examples 2 to 5

The difference from example 1 is that the weight of the activated carbon fibers of examples 2-5 is different, as shown in Table 2.

TABLE 2 weight scale (kg) of activated carbon fiber in examples 1-5

Composition of raw materials	Example 1	Example 2	Example 3	Example 4	Example 5
						Activated carbon fiber	10	4	16	12	8

Examples 6 to 9

The difference from example 1 is that the polypropylene and maleic anhydride grafted polypropylene of examples 6-9 differ in weight, as shown in Table 3.

TABLE 3 compositions of raw materials and weight tables (kg) for examples 1 and examples 6 to 9

Composition of raw materials	Example 1	Example 6	Example 7	Example 8	Example 9
						Polypropylene resin	65	90	40	55	75
Maleic anhydride grafted polypropylene	10	4	16	12	8

Example 10

The difference from example 1 is that the activated carbon fiber was replaced with the same weight of chitin fiber.

Example 11

The difference from example 1 is that the activated carbon fiber was replaced with the same weight of bamboo fiber.

Example 12

The difference from example 1 is that the activated carbon fiber is replaced with a composition of the same weight of activated carbon fiber and chitin fiber, and the weight ratio of the activated carbon fiber to the chitin fiber is 1:1.

Example 13

The difference from example 1 is that the activated carbon fiber is replaced with a combination of activated carbon fiber and bamboo fiber of the same weight, and the weight ratio of the activated carbon fiber to the bamboo fiber is 1:1.

Example 14

The difference from example 1 is that the activated carbon fiber is replaced with a composition of the same weight of activated carbon fiber, chitin fiber and bamboo fiber, and the weight ratio of the activated carbon fiber, the chitin fiber and the bamboo fiber is 1:1:1.

Example 15

The difference from example 12 is that the weight ratio of the activated carbon fiber to the chitin fiber is 5:1.

Example 16

The difference from example 12 is that the ratio of the activated carbon fiber to the chitin fiber is 3:1.

Example 17

The difference from example 1 is that 10kg of dandelion powder in preparation example 1 is also added in the first step.

Examples 18 to 19

The difference from example 17 is that the dandelion powder in preparation example 1 is different in weight, as shown in Table 4.

Table 4 weight scale (kg) of dandelion powder in examples 17-19

Composition of raw materials	Example 17	Example 18	Example 19
				Dandelion powder	10	16	4

Example 20

The difference from example 17 is that the dandelion powder in preparation example 1 was replaced with the dandelion powder in preparation example 2 of the same weight.

Example 21

The difference from example 17 is that the dandelion powder in preparation example 1 was replaced with the dandelion powder in preparation example 3 of the same weight.

Example 22

The difference from example 17 is that the dandelion powder in preparation example 1 was replaced with the honeysuckle powder in preparation example 4 of the same weight.

Example 23

The difference from example 17 is that the dandelion powder in preparation example 1 was replaced with the purslane powder in preparation example 4 of the same weight.

Example 24

The difference from example 17 is that the dandelion powder in preparation example 1 was replaced with the same weight of the mixture of the dandelion powder in preparation example 1 and the honeysuckle powder in preparation example 4, and the weight ratio of the honeysuckle powder in preparation example 4 to the dandelion powder in preparation example 1 was 1:1.

Example 25

The difference from example 17 is that the dandelion powder in preparation example 1 was replaced with the mixture of the honeysuckle powder in preparation example 4 and the purslane powder in preparation example 5 in the same weight, and the weight ratio of the honeysuckle powder in preparation example 4 to the purslane powder in preparation example 5 was 1:1.

Example 26

The dandelion powder in preparation example 17 was replaced with the same weight of the mixture of the dandelion powder in preparation example 1, the honeysuckle powder in preparation example 4 and the purslane powder in preparation example 5, and the weight ratio of the dandelion powder in preparation example 1, the honeysuckle powder in preparation example 4 and the purslane powder in preparation example 5 was 1:1:1.

Example 27

The difference from example 24 is that the weight ratio of the honeysuckle powder in preparation example 4 to the purslane powder in preparation example 5 is 3:1.

Example 28

The difference from example 24 is that the weight ratio of the honeysuckle powder in preparation example 4 to the purslane powder in preparation example 5 is 2:1.

Example 29

The difference from example 1 is that in step one, the polypropylene resin, the compatibilizer maleic anhydride grafted polypropylene and the activated carbon fiber are directly extruded and pelletized.

Example 30

The difference from example 1 is that in the second step, after extrusion granulation of the antibacterial and deodorant polypropylene material, an annealing treatment is also performed at 140 ℃.

Comparative example

Comparative example 1

The difference from example 1 is that comparative example 1 is a disposable polypropylene packaging box in the background art.

Comparative example 2

The difference from example 1 is that the compatibilizer maleic anhydride grafted polypropylene is not included.

Comparative example 3

The difference from example 1 is that no activated carbon fiber is included.

Performance test

Test method

Three samples were taken from examples 1 to 30 and comparative examples 1 to 3, respectively, and then injection-molded into a package box shown in fig. 1, after which baked sweet potatoes were put in and covered, and finally the package box with sweet potatoes was left for 720 hours in an environment with a temperature of 40 ℃ and a humidity of 50%, and finally the following test was performed and an average value was taken.

Test one, food microbial colony test

According to the method of colony counting of 6.3 in GB4789.2-2016 "determination of total number of microbial colonies for food", the above-mentioned sample is directly detected by means of colony counter to obtain total number of colonies and average value is obtained.

Test two, food smell test

The samples were placed in the same location, and then the odor of the samples was evaluated by fifty panelists, and the degree of odor of the samples was expressed as "Sa" according to the principle of minority compliance.

Sa0, no peculiar smell;

sa1: slightly peculiar smell;

sa2: has larger peculiar smell;

sa3: intolerable off-flavors.

Detection result: the results of the tests of examples 1 to 30 and comparative examples 1 to 3 are shown in Table 5.

TABLE 5 Table of the results of the tests of examples 1 to 30 and comparative examples 1 to 3

	Colony Count (CFU)	Degree of odor		Colony Count (CFU)	Degree of odor
						Example 1	30	Sa1	Example 18	19	Sa0
Example 2	45	Sa2	Example 19	26	Sa1
						Example 3	28	Sa1	Example 20	17	Sa0
Example 4	29	Sa1	Example 21	17	Sa0
						Example 5	35	Sa1	Example 22	16	Sa0
Example 6	42	Sa2	Example 23	15	Sa0
						Example 7	29	Sa1	Example 24	17	Sa0
Example 8	31	Sa1	Example 25	13	Sa0
						Example 9	35	Sa2	Example 26	15	Sa0
Example 10	34	Sa1	Example 27	12	Sa0
						Example 11	39	Sa1	Example 28	10	Sa0
Example 12	22	Sa0	Example 29	39	Sa2
						Example 13	27	Sa1	Example 30	15	Sa0
Example 14	25	Sa0	Comparative example 1	80	Sa3
						Example 15	20	Sa0	Comparative example 2	47	Sa2
Example 16	18	Sa0	Comparative example 3	80	Sa3
						Example 17	20	Sa0

As can be seen from the combination of examples 1 to 5, comparative example 1 and comparative example 3 and Table 5, the total number of colonies and the degree of odor in examples 1 to 5 are greatly reduced as compared with those in comparative examples 1 and comparative example 3, thereby demonstrating that the activated carbon fibers can effectively improve the antibacterial and odor-removing effects of the antibacterial and odor-removing polypropylene materials within the range of examples 1 to 5.

However, as can be seen from examples 1 and examples 3 to 4, when the addition amount of the activated carbon fiber reaches the specific gravity of example 1, the total number of colonies and the degree of odor of the antibacterial and deodorant polypropylene material are not significantly reduced even if the activated carbon fiber is further added, and the specific gravity of example 1 is still preferable for cost consideration.

As can be seen from the combination of examples 1, 6-9, comparative examples 1 and 2 and the combination of Table 5, the total number of colonies and the degree of odor in examples 1 and 6-9 are greatly reduced, thereby indicating that the specific gravity of maleic anhydride-grafted polypropylene can indirectly improve the antibacterial and odor-removing effects of the antibacterial and odor-removing polypropylene material within the ranges of examples 1 and 6-9.

However, as can be seen from examples 1 and examples 7 to 8, when the addition amount of the maleic anhydride-grafted polypropylene reached the specific gravity of example 1, the total number of colonies and the degree of odor of the antibacterial and deodorant polypropylene material were not significantly reduced even if the maleic anhydride-grafted polypropylene was further added, and the specific gravity of example 1 was still preferable for cost consideration.

It can be seen from the combination of examples 1, examples 10 to 16 and comparative example 1 that the total number of colonies and the degree of odor in examples 10 to 16 are significantly reduced as compared with comparative example 1, thereby indicating that the chitin fiber and the bamboo fiber can also enhance the antibacterial and odor-removing effects of the antibacterial and odor-removing polypropylene material, and that the enhancement of the antibacterial and odor-removing effects of the antibacterial and odor-removing polypropylene material is most remarkable when the activated carbon fiber and the chitin fiber are cooperatively used at a ratio of 3:1.

As can be seen from the combination of examples 17 to 19 and comparative example 1, the total number of colonies and the degree of odor in examples 17 to 19 are significantly reduced as compared with comparative example 1, thereby indicating that the dandelion powder can improve the antibacterial and odor-removing effects of the antibacterial and odor-removing polypropylene material under the specific gravity of examples 17 to 19.

However, as can be seen from examples 17 to 18, when the specific gravity of dandelion powder reached that of example 17, the total number of colonies and the degree of odor of the antibacterial and deodorant polypropylene material were not significantly reduced even if dandelion powder was further added, and the specific gravity of example 17 was still superior for cost consideration.

As can be seen from the combination of examples 17, examples 20 to 21 and comparative example 1 and Table 5, the total number of colonies and the degree of odor in examples 17 and examples 20 to 21 are significantly reduced as compared with comparative example 1, thereby demonstrating that the dandelion powder can effectively improve the antibacterial and odor-removing effects of the antibacterial and odor-removing polypropylene material under the particle sizes of examples 17 and examples 20 to 21.

However, as can be seen from examples 20 to 21, when the particle size of the dandelion powder reached that of example 20, the total colony count and the degree of odor of the antibacterial and deodorant polypropylene material were not significantly reduced even if the particle size of the dandelion powder was further reduced, and the specific gravity of example 17 was still superior for cost reasons.

As can be seen from the combination of example 17, examples 22-28 and comparative example 1 and Table 5, the total number of colonies and the degree of odor in examples 22-28 are significantly reduced as compared with comparative example 1, thereby demonstrating that the antibacterial and odor-removing effects of the antibacterial and odor-removing polypropylene material can be effectively improved by the honeysuckle powder and the purslane powder. And when the ratio of the honeysuckle powder to the purslane powder is in the range of 2:1, the antibacterial and deodorizing effects of the antibacterial and deodorizing polypropylene material are improved most obviously.

As can be seen from examples 1 and 29 in combination with table 5, the total number of colonies and the degree of odor in example 29 are significantly increased as compared with example 1, thereby demonstrating that the stirring and mixing operation prior to extrusion granulation can indirectly enhance the antibacterial and odor-removing effects of the antibacterial and odor-removing polypropylene material.

As can be seen from the combination of examples 1 and 30 and Table 5, the total number of colonies and the degree of odor in example 30 are significantly reduced as compared with example 1, thereby demonstrating that the annealing treatment after the injection granulation can indirectly improve the antibacterial and odor-removing effects of the antibacterial and odor-removing polypropylene material.

The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.

Claims

1. An antibacterial deodorizing polypropylene material is characterized by being prepared from the following raw materials in parts by weight: 40-90 parts of polypropylene resin, 4-16 parts of compatilizer, 4-16 parts of fiber material and 4-16 parts of antibacterial additive, wherein the fiber material is one or a mixture of more of activated carbon fiber, chitin fiber and bamboo fiber, the antibacterial additive is a mixture of honeysuckle powder and purslane powder, and the weight ratio of the honeysuckle powder to the purslane powder is 2:1;

the honeysuckle powder adopts the following preparation method:

BS3, parching the honeysuckle pretreatment powder at 900 ℃ for 15min, and then cooling to obtain honeysuckle powder;

the purslane powder adopts the following preparation method:

2. The antimicrobial deodorizing polypropylene material according to claim 1, wherein: the material is prepared from the following raw materials in parts by weight: 55-75 parts of polypropylene resin, 8-16 parts of compatilizer, 8-12 parts of fiber material and 4-16 parts of antibacterial additive.

3. The antimicrobial deodorizing polypropylene material according to claim 1, wherein: the fiber material is a mixture of activated carbon fiber and chitin fiber, and the weight ratio of the activated carbon fiber to the chitin fiber is 3:1.

4. A process for preparing an antibacterial and deodorant polypropylene material according to any one of claims 1 to 3, comprising the steps of:

step one, mixing and drying polypropylene resin, a compatilizer, a fiber material and an antibacterial additive to obtain a polypropylene mixed raw material;

5. The method for preparing the antibacterial and deodorant polypropylene material according to claim 4, wherein: and step two, after extrusion molding is carried out on the polypropylene mixed raw material, annealing treatment is carried out on the molded product under the melting point.

6. An application of the antibacterial and deodorant polypropylene material, which is characterized in that the antibacterial and deodorant polypropylene material as claimed in any one of claims 1-3 is applied to cooked food packaging.