CN108586934B - Biodegradable PP woven bag material and preparation method thereof - Google Patents
Biodegradable PP woven bag material and preparation method thereof Download PDFInfo
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- CN108586934B CN108586934B CN201810453130.9A CN201810453130A CN108586934B CN 108586934 B CN108586934 B CN 108586934B CN 201810453130 A CN201810453130 A CN 201810453130A CN 108586934 B CN108586934 B CN 108586934B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention discloses a biodegradable PP woven bag material which comprises the following components in parts by weight: polypropylene: 100-200 parts of bacillus natto: 0.1-0.5 parts of corn starch: 1-10 parts of a compatilizer: 0.5-1 part. Add bacillus natto powder and corn starch, can have the bacillus natto in the bacillus natto powder, bacillus natto can secrete a material to decompose corn starch itself, and in whole material preparation process, corn starch at first takes place the polymerization with polypropylene, as the bridge connection polypropylene molecule, bacillus natto powder also can polymerize wherein simultaneously, bury the in-process of soil, because the existence of bacillus natto powder, can play an effect that induces the degradation of corn starch molecule, thereby make whole molecular chain break, decompose macromolecule polypropylene into micromolecular polypropylene, help the degradation of whole macromolecule more.
Description
Technical Field
The invention relates to the field of woven bags, in particular to a biodegradable PP woven bag material and a preparation method thereof.
Background
Woven bags are also known as snakeskin bags. Is one kind of plastic bag for packing and is produced with polyethylene, polypropylene and other plastic material. The weaving density refers to the number of warp and weft yarns in a 100mm multiplied by 100mm woven fabric.
The woven bag is made of polypropylene (pp) as main raw material, through extrusion, stretching into flat filament, weaving and bag making.
The biodegradable PP woven bag is applied to packaging under many conditions, and the high polymer material is not degradable in the nature and can cause a large amount of pollution, so that the biodegradable PP woven bag is urgently needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a biodegradable PP woven bag material.
In order to achieve the purpose, the invention provides the following technical scheme:
a biodegradable PP woven bag material,
comprises the following components in parts by weight:
polypropylene: 100 to 200 parts of
The bacillus natto comprises the following components in parts by weight: 0.1 to 0.5 portion
Corn starch: 1 to 10 parts of
A compatilizer: 0.5-1 part.
As a further improvement of the invention:
the compatilizer is glycidyl methacrylate.
As a further improvement of the invention: the polypropylene comprises the following components in parts by weight:
PP powder material: 20 portions of
PP granules: 80 parts of the raw materials.
As a further improvement of the invention: also comprises a reinforcing agent: 2 parts of reinforcing agent, wherein the reinforcing agent is a mixture of acrylic acid-2, 3-epoxypropyl ester, 3- (trimethylsilyl) propyl acrylate and 2- (allyloxy) -N, N-dimethyl-2-propylene-1-amine.
As a further improvement of the invention: the mass ratio of acrylic acid-2, 3-epoxypropyl ester, 3- (trimethylsilyl) propyl acrylate and 2- (allyloxy) -N, N-dimethyl-2-propylene-1-amine in the reinforcing agent is 1: 2.
As another object of the present invention:
a preparation method of a biodegradable PP woven bag material comprises the following steps: weighing bacillus natto powder and corn starch according to a proportion, and putting the bacillus natto powder and the corn starch into a stirrer for mixing;
step two: stopping the machine after the mixing is finished, and weighing the compatilizer to be added into the machine for mixing;
step three: weighing polypropylene, adding the polypropylene into the polypropylene and mixing the polypropylene and the polypropylene;
step four: and adding the mixed raw materials into a granulator for granulation to obtain the woven bag material.
As a further improvement of the invention: in the fourth step, the temperature of the charging barrel of the granulator is set to 190 ℃ in the first zone, 200 ℃ in the second zone, 210 ℃ in the third zone, 220 ℃ in the third zone, 230 ℃ in the fourth zone and 240 ℃ in the fifth zone.
As a further improvement of the invention: and in the third step, the PP powder is firstly added and mixed for 10min, the PP granules are added and mixed for 5min, and the rotating speed in the stirrer is 1000 r/min.
As a further improvement of the invention: the stirring rotating speed in the first step and the second step is 1000 r/min. As a further improvement of the invention: in the third step, the reinforcing agent is added and mixed at the same time of adding the polypropylene and mixing.
Firstly, polypropylene is used as a raw material, a woven bag material is prepared, in the process, bacillus natto powder and corn starch are added, bacillus natto exists in the bacillus natto powder, the bacillus natto secretes a substance to decompose the corn starch, in the whole material preparation process, the corn starch is polymerized with the polypropylene at first and serves as a bridge to connect polypropylene molecules, meanwhile, the bacillus natto powder is polymerized in the bacillus natto, in the process of being buried in soil, due to the existence of the bacillus natto powder, the effect of inducing the corn starch molecules to degrade can be achieved, therefore, the whole molecular chain is broken, macromolecular polypropylene is decomposed into micromolecular polypropylene, and the degradation of the whole macromolecule is facilitated.
In the specific mixing process, the polypropylene adopts the common use of powder and granules, the powder, the bacillus natto powder and the corn starch are mixed firstly, and then the mixture is mixed with the granules, so that the mixing effect is more uniform. As the conditions for sufficient degradation, one of the conditions is that the distribution of corn starch molecules is uniform, so that the step is helpful for improving the degradation capability of the high molecules.
In the using process, a certain amount of compatilizer is added, so that the raw materials of the whole material are uniformly mixed, and the degradation effect can be further improved by selectively using glycidyl methacrylate to a certain extent.
Detailed Description
The first embodiment is as follows:
a biodegradable PP woven bag material,
comprises the following components in parts by weight:
polypropylene: 100 portions of
The bacillus natto comprises the following components in parts by weight: 0.3 part
Corn starch: 8 portions of
A compatilizer: 0.5 portion
Reinforcing agent: and 2 parts.
The compatilizer is glycidyl methacrylate.
The polypropylene comprises the following components in parts by weight:
PP powder material: 20 portions of
PP granules: 80 parts of the raw materials.
The reinforcing agent is a mixture of acrylic acid-2, 3-epoxypropyl ester, 3- (trimethylsilyl) propyl acrylate and 2- (allyloxy) -N, N-dimethyl-2-propylene-1-amine.
The mass ratio of acrylic acid-2, 3-epoxypropyl ester, 3- (trimethylsilyl) propyl acrylate and 2- (allyloxy) -N, N-dimethyl-2-propylene-1-amine in the reinforcing agent is 1: 2.
A method for preparing a biodegradable PP braided bag material,
the method comprises the following steps: weighing bacillus natto powder and corn starch according to a proportion, and putting the bacillus natto powder and the corn starch into a stirrer for mixing;
step two: stopping the machine after the mixing is finished, and weighing the compatilizer to be added into the machine for mixing;
step three: weighing polypropylene, adding the polypropylene into the polypropylene and mixing the polypropylene and the polypropylene;
step four: and adding the mixed raw materials into a granulator for granulation to obtain the woven bag material.
In the fourth step, the temperature of the charging barrel of the granulator is set to 190 ℃ in the first zone, 200 ℃ in the second zone, 210 ℃ in the third zone, 220 ℃ in the third zone, 230 ℃ in the fourth zone and 240 ℃ in the fifth zone.
And in the third step, the PP powder is firstly added and mixed for 10min, the PP granules are added and mixed for 5min, and the rotating speed in the stirrer is 1000 r/min.
The stirring rotating speed in the first step and the second step is 1000 r/min.
In the third step, the reinforcing agent is added and mixed at the same time of adding the polypropylene and mixing.
Example two:
a biodegradable PP woven bag material,
comprises the following components in parts by weight:
polypropylene: 150 portions of
The bacillus natto comprises the following components in parts by weight: 0.5 portion
Corn starch: 2 portions of
A compatilizer: 0.8 part.
The compatilizer is glycidyl methacrylate.
The polypropylene comprises the following components in parts by weight:
PP powder material: 20 portions of
PP granules: 80 parts of the raw materials.
Also comprises a reinforcing agent: 2 parts of reinforcing agent, wherein the reinforcing agent is a mixture of acrylic acid-2, 3-epoxypropyl ester and 3- (trimethylsilyl) propyl acrylate.
The mass ratio of acrylic acid-2, 3-epoxypropyl ester and 3- (trimethylsilyl) propyl acrylate in the reinforcing agent is 1: 1.
A method for preparing a biodegradable PP braided bag material,
the method comprises the following steps: weighing bacillus natto powder and corn starch according to a proportion, and putting the bacillus natto powder and the corn starch into a stirrer for mixing;
step two: stopping the machine after the mixing is finished, and weighing the compatilizer to be added into the machine for mixing;
step three: weighing polypropylene, adding the polypropylene into the polypropylene and mixing the polypropylene and the polypropylene;
step four: and adding the mixed raw materials into a granulator for granulation to obtain the woven bag material.
In the fourth step, the temperature of the charging barrel of the granulator is set to 190 ℃ in the first zone, 200 ℃ in the second zone, 210 ℃ in the third zone, 220 ℃ in the third zone, 230 ℃ in the fourth zone and 240 ℃ in the fifth zone.
And in the third step, the PP powder is firstly added and mixed for 10min, the PP granules are added and mixed for 5min, and the rotating speed in the stirrer is 1000 r/min.
The stirring rotating speed in the first step and the second step is 1000 r/min.
In the third step, the reinforcing agent is added and mixed at the same time of adding the polypropylene and mixing.
Example three:
a biodegradable PP woven bag material,
comprises the following components in parts by weight:
polypropylene: 200 portions of
The bacillus natto comprises the following components in parts by weight: 0.1 part
Corn starch: 5 portions of
A compatilizer: 1 part.
The compatilizer is glycidyl methacrylate.
The polypropylene comprises the following components in parts by weight:
PP powder material: 20 portions of
PP granules: 80 parts of the raw materials.
Also comprises a reinforcing agent: 2 parts of reinforcing agent, wherein the reinforcing agent is a mixture of 3- (trimethylsilyl) propyl acrylate and 2- (allyloxy) -N, N-dimethyl-2-propylene-1-amine.
The mass ratio of 3- (trimethylsilyl) propyl acrylate to 2- (allyloxy) -N, N-dimethyl-2-propylene-1-amine in the reinforcing agent is 1: 2.
A method for preparing a biodegradable PP braided bag material,
the method comprises the following steps: weighing bacillus natto powder and corn starch according to a proportion, and putting the bacillus natto powder and the corn starch into a stirrer for mixing;
step two: stopping the machine after the mixing is finished, and weighing the compatilizer to be added into the machine for mixing;
step three: weighing polypropylene, adding the polypropylene into the polypropylene and mixing the polypropylene and the polypropylene;
step four: and adding the mixed raw materials into a granulator for granulation to obtain the woven bag material.
In the fourth step, the temperature of the charging barrel of the granulator is set to 190 ℃ in the first zone, 200 ℃ in the second zone, 210 ℃ in the third zone, 220 ℃ in the third zone, 230 ℃ in the fourth zone and 240 ℃ in the fifth zone.
And in the third step, the PP powder is firstly added and mixed for 10min, the PP granules are added and mixed for 5min, and the rotating speed in the stirrer is 1000 r/min.
The stirring rotating speed in the first step and the second step is 1000 r/min.
In the third step, the reinforcing agent is added and mixed at the same time of adding the polypropylene and mixing.
Example four
A biodegradable PP woven bag material,
comprises the following components in parts by weight:
polypropylene: 100 portions of
The bacillus natto comprises the following components in parts by weight: 0.3 part
Corn starch: 8 portions of
A compatilizer: 0.5 part.
The compatilizer is glycidyl methacrylate.
The polypropylene comprises the following components in parts by weight:
PP powder material: 20 portions of
PP granules: 80 parts of the raw materials.
A method for preparing a biodegradable PP braided bag material,
the method comprises the following steps: weighing bacillus natto powder and corn starch according to a proportion, and putting the bacillus natto powder and the corn starch into a stirrer for mixing;
step two: stopping the machine after the mixing is finished, and weighing the compatilizer to be added into the machine for mixing;
step three: weighing polypropylene, adding the polypropylene into the polypropylene and mixing the polypropylene and the polypropylene;
step four: and adding the mixed raw materials into a granulator for granulation to obtain the woven bag material.
In the fourth step, the temperature of the charging barrel of the granulator is set to 190 ℃ in the first zone, 200 ℃ in the second zone, 210 ℃ in the third zone, 220 ℃ in the third zone, 230 ℃ in the fourth zone and 240 ℃ in the fifth zone.
And in the third step, the PP powder is firstly added and mixed for 10min, the PP granules are added and mixed for 5min, and the rotating speed in the stirrer is 1000 r/min.
The stirring rotating speed in the first step and the second step is 1000 r/min.
Comparative example one:
a biodegradable PP woven bag material,
comprises the following components in parts by weight:
polypropylene: 100 portions of
Corn starch: 8 portions of
A compatilizer: 0.5 part.
The compatilizer is glycidyl methacrylate.
The polypropylene comprises the following components in parts by weight:
PP powder material: 20 portions of
PP granules: 80 parts of the raw materials.
A method for preparing a biodegradable PP braided bag material,
the method comprises the following steps: weighing corn starch according to a proportion, and putting the corn starch into a stirrer for mixing;
step two: stopping the machine after the mixing is finished, and weighing the compatilizer to be added into the machine for mixing;
step three: weighing polypropylene, adding the polypropylene into the polypropylene and mixing the polypropylene and the polypropylene;
step four: and adding the mixed raw materials into a granulator for granulation to obtain the woven bag material.
In the fourth step, the temperature of the charging barrel of the granulator is set to 190 ℃ in the first zone, 200 ℃ in the second zone, 210 ℃ in the third zone, 220 ℃ in the third zone, 230 ℃ in the fourth zone and 240 ℃ in the fifth zone.
And in the third step, the PP powder is firstly added and mixed for 10min, the PP granules are added and mixed for 5min, and the rotating speed in the stirrer is 1000 r/min.
The stirring rotating speed in the first step and the second step is 1000 r/min.
Comparative example two:
a biodegradable PP woven bag material,
comprises the following components in parts by weight:
polypropylene: 100 portions of
The bacillus natto comprises the following components in parts by weight: 0.3 part
A compatilizer: 0.5 part.
The compatilizer is glycidyl methacrylate.
The polypropylene comprises the following components in parts by weight:
PP powder material: 20 portions of
PP granules: 80 parts of the raw materials.
A method for preparing a biodegradable PP braided bag material,
the method comprises the following steps: weighing natto powder according to a proportion, and mixing the natto powder in a stirrer;
step two: stopping the machine after the mixing is finished, and weighing the compatilizer to be added into the machine for mixing;
step three: weighing polypropylene, adding the polypropylene into the polypropylene and mixing the polypropylene and the polypropylene;
step four: and adding the mixed raw materials into a granulator for granulation to obtain the woven bag material.
In the fourth step, the temperature of the charging barrel of the granulator is set to 190 ℃ in the first zone, 200 ℃ in the second zone, 210 ℃ in the third zone, 220 ℃ in the third zone, 230 ℃ in the fourth zone and 240 ℃ in the fifth zone.
And in the third step, the PP powder is firstly added and mixed for 10min, the PP granules are added and mixed for 5min, and the rotating speed in the stirrer is 1000 r/min.
The stirring rotating speed in the first step and the second step is 1000 r/min.
Comparative example three:
a biodegradable PP woven bag material,
comprises the following components in parts by weight:
polypropylene: 100 portions of
The bacillus natto comprises the following components in parts by weight: 0.3 part
Corn starch: 8 parts.
The polypropylene comprises the following components in parts by weight:
PP powder material: 20 portions of
PP granules: 80 parts of the raw materials.
A method for preparing a biodegradable PP braided bag material,
the method comprises the following steps: weighing natto powder and corn starch in proportion, and mixing in a stirrer;
step two: weighing polypropylene, adding the polypropylene into the polypropylene and mixing the polypropylene and the polypropylene;
step three: and adding the mixed raw materials into a granulator for granulation to obtain the woven bag material.
The temperature of the charging barrel of the granulator in the third step is set to 190 ℃ in the first zone, 200 ℃ in the second zone, 210 ℃ in the third zone, 220 ℃ in the third zone, 230 ℃ in the fourth zone and 240 ℃ in the fifth zone.
And in the second step, the PP powder is firstly added and mixed for 10min, the PP granules are added and mixed for 5min, and the rotating speed in a stirrer is 1000 r/min.
The stirring rotating speed in the first step and the second step is 1000 r/min.
And (3) testing: the materials of the examples and comparative examples were each made into a plastic sheet-like material, and the properties were tested by sampling.
Degradation degree test method: taking a rectangular piece of the prepared PP sheet membrane material with the thickness of 0.08mm and the thickness of 200mmx300mm, flattening and burying the rectangular piece in a corn seedling field for 60 days, taking out the rectangular piece, washing, drying and weighing the rectangular piece, calculating the weight loss percentage, and recording the weight loss percentage as the degradation degree.
Table one: testing under normal conditions:
table two: the test was carried out after 10 hours of irradiation with an ultraviolet lamp:
according to the technical scheme, the woven bag material is prepared by taking polypropylene as a raw material, bacillus natto powder and corn starch are added in the process, bacillus natto exists in the bacillus natto powder, the bacillus natto secretes a substance to decompose the corn starch, and in the whole material preparation process, the corn starch is polymerized with the polypropylene at first and serves as a bridge to connect polypropylene molecules, and meanwhile, the bacillus natto also polymerizes in the polypropylene molecules.
In the specific mixing process, the polypropylene adopts the common use of powder and granules, the powder, the bacillus natto powder and the corn starch are mixed firstly, and then the mixture is mixed with the granules, so that the mixing effect is more uniform. As the conditions for sufficient degradation, one of the conditions is that the distribution of corn starch molecules is uniform, so that the step is helpful for improving the degradation capability of the high molecules.
In the using process, a certain amount of compatilizer is added, so that the raw materials of the whole material are uniformly mixed, and the degradation effect can be further improved by selectively using glycidyl methacrylate to a certain extent.
In addition, in the prior art, the mechanical property of the degradable material is reduced after the degradable material is irradiated by sunlight for a long time, and the mechanical strength of the degradable material after the sunlight irradiation is improved on the premise of ensuring the degradability of the whole material by adding acrylic acid-2, 3-epoxypropyl ester, 3- (trimethylsilyl) propyl acrylate and 2- (allyloxy) -N, N-dimethyl-2-propylene-1-amine as a reinforcing agent.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (2)
1. A biodegradable PP woven bag material is characterized by comprising the following components in parts by weight: polypropylene: 100 parts of (A); and (3) bacillus natto powder: 0.3 part; corn starch: 8 parts of a mixture; a compatilizer: 0.5 part; reinforcing agent: 2 parts of (1); the compatilizer is glycidyl methacrylate; the polypropylene comprises the following components in parts by weight: PP powder material: 20 parts of (1); PP granules: 80 parts of a mixture; the reinforcing agent is a mixture of acrylic acid-2, 3-epoxypropyl ester, 3- (trimethylsilyl) propyl acrylate and 2- (allyloxy) -N, N-dimethyl-2-propylene-1-amine; the mass ratio of acrylic acid-2, 3-epoxypropyl ester, 3- (trimethylsilyl) propyl acrylate and 2- (allyloxy) -N, N-dimethyl-2-propylene-1-amine in the reinforcing agent is 1: 2.
2. The method for preparing biodegradable PP woven bag material according to claim 1,
the method comprises the following steps: weighing bacillus natto powder and corn starch according to a proportion, and putting the bacillus natto powder and the corn starch into a stirrer for mixing;
step two: stopping the machine after the mixing is finished, and weighing the compatilizer to be added into the machine for mixing;
step three: weighing polypropylene, adding the polypropylene into the polypropylene and mixing the polypropylene and the polypropylene;
step four: adding the mixed raw materials into a granulator for granulation to obtain a woven bag material;
in the fourth step, the temperature of a charging barrel of the granulator is set to 190 ℃ in the first zone, 200 ℃ in the second zone, 210 ℃ in the third zone, 230 ℃ in the fourth zone and 240 ℃ in the fifth zone;
in the third step, the PP powder is firstly added and mixed for 10min, then the PP granules are added and mixed for 5min, and the rotating speed in a stirrer is 1000 r/min;
the stirring rotating speed in the first step and the second step is 1000 r/min;
in the third step, the reinforcing agent is added and mixed at the same time of adding the polypropylene and mixing.
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| CN114540969B (en) * | 2022-02-25 | 2023-01-24 | 连云港正凯塑料制品有限公司 | Degradable light non-combustion-supporting plastic mesh bag processing technology and device |
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