CN113789007A

CN113789007A - Antibacterial and deodorant polypropylene material and preparation method and application thereof

Info

Publication number: CN113789007A
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: 2021-12-14
Anticipated expiration: 2041-09-02
Also published as: CN113789007B

Abstract

The application relates to the technical field of cooked food packaging raw materials, in particular to an antibacterial and deodorant polypropylene material as well as a preparation method and application thereof. The antibacterial and deodorant polypropylene material is prepared from the following raw materials in parts by weight: 40-90 parts of polypropylene resin, 4-16 parts of a compatilizer and 4-16 parts of a 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 and deodorant polypropylene material comprises the following steps: (1) preparing a polypropylene mixed raw material; (2) preparing antibacterial deodorizing polypropylene master batches; (3) preparing the 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 and deodorant 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 and deodorant polypropylene material as well as a preparation method and application thereof.

Background

Polypropylene is a colorless, odorless, non-toxic, translucent solid substance. Polypropylene is a thermoplastic synthetic resin with excellent performance, has the properties of chemical resistance, heat resistance, electrical insulation, high-strength mechanical property, high wear resistance and the like, and is further widely applied to a plurality of fields of machinery, automobiles, electronic and electric appliances, buildings, textiles, packaging, agriculture, forestry, fishery, food industry and the like.

In the related art, the preparation method of the traditional disposable polypropylene packing box comprises the following steps: (1) drying the polypropylene resin; (2) mixing polypropylene resin and color master batch to obtain a mixed material; (3) extruding and granulating the mixed material to obtain mixed granules; (4) and carrying out injection molding on the mixed granules to obtain the polypropylene packing box.

In view of the above-mentioned related art, the inventors considered that although polypropylene has advantages of being colorless, odorless and nontoxic, when a polypropylene packaging box stores cooked food for a long time, the rotten smell of the cooked food and irritant gas emitted from polypropylene resin due to heating are easily mixed in the packaging box, and there is a drawback that the above-mentioned polypropylene packaging box easily affects the taste of the cooked food.

Disclosure of Invention

In order to solve the problem that the taste of cooked food is easily affected by the disposable polypropylene packing box, the application provides an antibacterial and deodorant polypropylene material and a preparation method and application thereof.

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

an antibacterial and deodorant polypropylene material is prepared from the following raw materials in parts by weight: 40-90 parts of polypropylene resin, 4-16 parts of a compatilizer and 4-16 parts of a 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 in the proportion is adopted 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 through 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 the cooked food is effectively reduced.

In addition, as the fiber materials such as the activated carbon fiber, the chitin fiber, the bamboo fiber and the like are all fibrous, the fiber materials can also provide toughening effect to the antibacterial deodorizing polypropylene material, so that the possibility of breakage and breakage of the antibacterial deodorizing polypropylene material is reduced, and the service life of the antibacterial deodorizing polypropylene material is effectively prolonged.

Preferably, the feed additive 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, the fiber material and the polypropylene resin are mixed according to the proportion, so that the fiber material can be uniformly distributed in the polypropylene resin through the compatilizer, the antibacterial and odor-removing effects of the antibacterial and odor-removing polypropylene material are further improved, 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 fibers and chitin fibers, and the weight ratio of the activated carbon fibers to the chitin fibers is 3: 1.

By adopting the technical scheme, the fiber material is composed of the activated carbon fiber and the chitin fiber according to the proportion, so that the antibacterial and odor-removing effects of the antibacterial and odor-removing polypropylene material are further improved through the synergistic effect of the activated 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 and health-care food further comprises 4-16 parts by weight of an antibacterial additive, wherein the antibacterial additive is one or a mixture of more of honeysuckle powder, dandelion powder and purslane powder.

By adopting the technical scheme, because the honeysuckle powder, the dandelion powder and the purslane powder in the proportion are adopted as the antibacterial additives to be added into the antibacterial deodorizing polypropylene material, the antibacterial and bactericidal effects of the honeysuckle powder, the dandelion powder and the purslane powder are utilized to further improve the antibacterial and deodorizing polypropylene material 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 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 is composed of the honeysuckle powder and the purslane powder in the proportion, so that the antibacterial and deodorizing effect of the antibacterial and deodorizing polypropylene material is further improved 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 200-400 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 the 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 application provides a preparation method of an antibacterial and deodorant polypropylene material, which adopts the following technical scheme:

a preparation method of an antibacterial and deodorant 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, carrying out extrusion molding on the polypropylene mixed raw material to obtain the antibacterial and deodorant polypropylene material.

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

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

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

By adopting the technical scheme, because the annealing treatment is carried out in the third step, incomplete microcrystals in the antibacterial deodorizing polypropylene material are further promoted to be melted at a low temperature and then cooled again, so that the chain segment arrangement is adjusted to enable the crystal structure to tend to be uniform, and the orientation distribution of an amorphous area and a crystal area of the material is effectively controlled in the crystallization-orientation-recrystallization process, so that 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 and deodorant polypropylene material, which adopts the following technical scheme:

an antibacterial and deodorant polypropylene material which can be applied to cooked food packaging.

By adopting the technical scheme, because the antibacterial deodorizing polypropylene material is adopted to prepare the cooked food package, the influence of the cooked food package on the taste of the cooked food is effectively reduced through the antibacterial and deodorizing effects of 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 adopted as the fiber material to be added into the polyethylene, the antibacterial and deodorizing polypropylene material is promoted to obtain the antibacterial and deodorizing effects, and the influence of the polypropylene resin on the taste of the cooked food is effectively reduced;

2. in the application, because the fiber materials such as the activated carbon fiber, the chitin fiber, the bamboo fiber and the like are fibrous, the fiber materials can also have a toughening effect on the antibacterial deodorizing polypropylene material, and the service life of the antibacterial deodorizing polypropylene material is effectively prolonged;

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

Drawings

Fig. 1 is a schematic structural diagram of one of the packaging boxes 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 will be described in further detail below with reference to fig. 1, fig. 2, examples, and comparative examples.

Referring to fig. 1 and 2, two types of packing boxes disclosed in the present application are the same in material and manufacturing method, and thus only the manufacturing method of the packing box of fig. 1 will be described below.

Raw materials and raw material preparation examples

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

TABLE 1 sources of the raw material components

Raw materials	Manufacturer of the product	Specification of
			Polypropylene resin	Shanghai Ian Chemical Technology Co.,Ltd.	Product numbering: r033079
Maleic anhydride grafted polypropylene	Sigma Aldrich trade, Inc	Product numbering: 427845
			Activated carbon fiber	Nantong Senyou carbon fiber efficient Co Ltd	The model is as follows: SY-ACF-1001
Chitin fiber	Jinjinle chemical Co Ltd	CAS：52519-63-8
			Bamboo fiber	Weifang City Yubang textile Limited	The model is as follows: yubang B16S
Dandelion	Bozhou city hundred million Hongtong pharmaceutical Co Ltd	/
			Honeysuckle	Sanjiang flower and plant cooperative society in Qingzhou city	/
Herba Portulacae	Chenfeng Chinese medicinal plant cooperative in Bozhou city	/

Preparation example 1

A dandelion powder material adopts the following preparation method:

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

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

AS3 parching the herba Taraxaci pre-treated 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 herb pre-treated 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

A honeysuckle powder is prepared by the following steps:

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

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

BS3 parching flos Lonicerae pretreated powder at 900 deg.C for 15min, and cooling to obtain flos Lonicerae powder.

Preparation example 5

The purslane powder adopts the following preparation method:

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

CS2, placing the dry purslane material in a steamer to steam for 15min, then taking out and naturally cooling, and then crushing and sieving the dry purslane material by a crusher to obtain 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 step two, placing the polypropylene mixed raw material in an extruder for extrusion granulation to obtain the antibacterial and deodorant polypropylene material.

Examples 2 to 5

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

TABLE 2 weight table (kg) of activated carbon fibers 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 differences from example 1 are in the weight differences between the polypropylenes of examples 6-9 and the maleic anhydride grafted polypropylenes, as shown in Table 3.

TABLE 3 composition of each raw material and weight table (kg) in example 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 is replaced with chitin fiber of the same weight.

Example 11

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

Example 12

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

Example 14

The difference from the example 1 is that the activated carbon fiber is replaced by a composition of the activated carbon fiber, the chitin fiber and the bamboo fiber with the same weight, 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 was 3: 1.

Example 17

The difference from example 1 is that 10kg of dandelion powder of preparation example 1 was added in step one.

Examples 18 to 19

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

TABLE 4 weight table (kg) of dandelion powder of 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 was that the dandelion powder of preparation example 1 was replaced by the same weight of dandelion powder of preparation example 2.

Example 21

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

Example 22

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

Example 23

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

Example 24

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

Example 25

The difference from example 17 is that the dandelion powder of preparation example 1 was replaced with the same weight of the mixture of the honeysuckle powder of preparation example 4 and the purslane powder of preparation example 5, and the weight ratio of the honeysuckle powder of preparation example 4 to the purslane powder of 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 4 to the purslane powder in preparation 5 is 3: 1.

Example 28

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

Example 29

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

Example 30

The difference from example 1 is that in the second step, after the antibacterial and deodorant polypropylene material is extruded and pelletized, annealing treatment is further performed at 140 ℃.

Comparative example

Comparative example 1

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

Comparative example 2

The difference from example 1 is that maleic anhydride grafted polypropylene, a compatibilizer, was not included.

Comparative example 3

The difference from example 1 is that activated carbon fibers are not included.

Performance test

Test method

Three parts of samples were taken out 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 closed, and finally the package box with the sweet potatoes was left for 720 hours at a temperature of 40 ℃ and a humidity of 50%, and finally the following tests were performed, and the average value was taken.

First, testing of microbial colonies in food

According to the method of 6.3 colony counting in GB4789.2-2016 (determination of total number of food microbial colonies), the samples are directly detected by a colony counter to obtain the total number of colonies, and the average value is taken.

Test two, food odor test

The odor of the above samples was evaluated by fifty evaluators after placing the above samples at the same position, and the odor degree of the above samples was expressed as "Sa" according to the minority-compliant principle.

Sa0, no peculiar smell;

sa 1: slightly peculiar smell;

sa 2: has large peculiar smell;

sa 3: intolerable off-flavors.

And (3) detection results: the results of the tests of examples 1 to 30 and comparative examples 1 to 3 are shown in Table 5.

TABLE 5 test results of examples 1 to 30 and comparative examples 1 to 3

	Total number of Colonies (CFU)	Degree of odor		Total number of Colonies (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 by combining examples 1-5, comparative example 1 and comparative example 3, and by combining Table 5, the total number of colonies and the odor degree of examples 1-5 are greatly reduced compared to comparative example 1 and comparative example 3, thereby showing that the activated carbon fiber can effectively improve the antibacterial and odor-removing effects of the antibacterial and odor-removing polypropylene material within the range of examples 1-5.

However, as can be seen from examples 1 and 3 to 4, when the amount of the activated carbon fiber added 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 in view of cost.

As can be seen by combining examples 1, 6-9, comparative examples 1 and 2 and Table 5, the total number of colonies and the degree of odor of examples 1 and 6-9 were greatly reduced, thus demonstrating that the specific gravity of the maleic anhydride grafted polypropylene within the ranges of examples 1 and 6-9 can indirectly improve the antibacterial and odor-removing effects of the antibacterial and odor-removing polypropylene material.

However, it can be seen from examples 1 and 7 to 8 that, when the amount of the maleic anhydride-grafted polypropylene added 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 maleic anhydride-grafted polypropylene is further added, and the specific gravity of example 1 is still superior for cost reasons.

It can be seen by combining example 1, examples 10 to 16 and comparative example 1 that the total number of colonies and the odor degree of examples 10 to 16 are significantly reduced compared to comparative example 1, thereby indicating that the chitin fiber and the bamboo fiber can also improve the antibacterial and odor removing effects of the antibacterial and odor removing polypropylene material, and when the activated carbon fiber and the chitin fiber are synergistically used at a ratio of 3:1, the antibacterial and odor removing effects of the antibacterial and odor removing polypropylene material are improved most obviously.

As can be seen by combining examples 17-19 and comparative example 1 with comparative example 1, the total number of colonies and the odor degree of examples 17-19 are significantly reduced compared to comparative example 1, thereby demonstrating that the antibacterial and odor-removing effects of the antibacterial and odor-removing polypropylene material can be improved by the dandelion powder under the specific gravity of examples 17-19.

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

As can be seen by combining example 17, examples 20-21 and comparative example 1 with Table 5, the total number of colonies and the degree of odor of example 17 and examples 20-21 are significantly reduced compared to comparative example 1, thus 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 size of example 17 and examples 20-21.

However, as can be seen from examples 20 to 21, when the particle size of the dandelion powder reached the particle size of example 20, the total number of bacterial colonies and the degree of odor of the antibacterial deodorizing polypropylene material did not decrease significantly even if the particle size of the dandelion powder was further decreased, and the specific gravity of example 17 was still superior for cost reasons.

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

As can be seen from example 1 and example 29 in combination with table 5, the total number of colonies and the degree of odor in example 29 are significantly increased compared to example 1, and thus it is demonstrated that the mixing operation before extrusion granulation can indirectly improve the antibacterial and odor removing effects of the antibacterial and odor removing polypropylene material.

As can be seen from example 1 and example 30 in combination with table 5, the total number of colonies and the odor degree of example 30 are significantly reduced compared to example 1, and thus it is demonstrated that the antibacterial and odor removing effects of the antibacterial and odor removing polypropylene material can be indirectly improved by performing the annealing treatment after the injection molding granulation.

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

1. The antibacterial and deodorant 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 a compatilizer and 4-16 parts of a fiber material, wherein the fiber material is one or a mixture of more of activated carbon fiber, chitin fiber and bamboo fiber.

2. The antibacterial and deodorant polypropylene material according to claim 1, wherein: the feed 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.

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

4. The antibacterial and deodorant polypropylene material according to claim 1, wherein: the antibacterial and antibacterial composite material also comprises 4-16 parts by weight of an antibacterial additive, wherein the antibacterial additive is one or a mixture of more of honeysuckle powder, dandelion powder and purslane powder.

5. The antibacterial and deodorant polypropylene material according to claim 4, wherein: 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.

6. The antibacterial and deodorant polypropylene material according to claim 4, wherein: the particle size of the antibacterial additive is between 200-400 meshes.

7. A method for preparing the antibacterial deodorizing polypropylene material according to any one of claims 1 to 6, characterized by comprising the steps of:

8. The method for preparing the antibacterial deodorizing polypropylene material according to claim 7, characterized in that: and in the second step, after the antibacterial deodorizing polypropylene master batch is extruded and formed, annealing the formed product at the melting point.

9. The application of the antibacterial and deodorant polypropylene material is characterized in that the antibacterial and deodorant polypropylene material can be applied to cooked food packaging.