CN111438910A - Environment-friendly straw and manufacturing method thereof - Google Patents
Environment-friendly straw and manufacturing method thereof Download PDFInfo
- Publication number
- CN111438910A CN111438910A CN201910040690.6A CN201910040690A CN111438910A CN 111438910 A CN111438910 A CN 111438910A CN 201910040690 A CN201910040690 A CN 201910040690A CN 111438910 A CN111438910 A CN 111438910A
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- Prior art keywords
- transparent
- polylactic acid
- starch
- particles
- strip
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G21/00—Table-ware
- A47G21/18—Drinking straws or the like
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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
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/02—Starch; Degradation products thereof, e.g. dextrin
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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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
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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
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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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
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
Abstract
The invention relates to a manufacturing method of an environment-friendly straw, which comprises the following steps: adding high-toughness polylactic acid particles and transparent starch particles into an internal mixer for high-temperature mixing to form transparent polylactic acid blocks; taking out the transparent polylactic acid block from the internal mixer, and putting the transparent polylactic acid block into a granulation screw machine to prepare a plurality of transparent polylactic acid particles; adding a plurality of transparent polylactic acid particles into a screw extruder for heating; extruding a strip-shaped transparent plastic pipe by a screw extruder, flushing the strip-shaped transparent plastic pipe by water flow at 60 +/-5 ℃ and water flow at 80 +/-5 ℃ at an extrusion opening, stretching and extending the strip-shaped transparent plastic pipe, and flushing the strip-shaped transparent plastic pipe by cold water at 5 +/-2 ℃ to shape the strip-shaped transparent plastic pipe; the pipe cutter is used for cutting the strip-shaped transparent plastic pipe to manufacture the environment-friendly suction pipe. The invention utilizes the transparent polylactic acid particles to manufacture the biodegradable environment-friendly straw so as to avoid environmental pollution.
Description
Technical Field
The invention relates to a straw for daily necessities, in particular to a biodegradable environment-friendly straw and a manufacturing method thereof.
Background
The plastic straw is very popular, at present, hand-operated beverage shops spread over Taiwan, particularly in summer of inflammation, people can go to buy beverages, and beverage shops and beverage packages can match one plastic straw for the people, so that the people can use the beverages.
Most of the traditional plastic straws are petrochemical industry products, the plastic straws do bring great convenience to human beings in the early coming out period, the plastic straws are insoluble in liquid, the beverage using concept of a user is overturned, complicated cleaning is omitted due to the fact that the plastic straws are used up and lost, and the convenience of drinking the beverage is greatly improved. The suction pipe on the market at present has three material types, polypropylene, polyethylene or polyvinyl chloride respectively, polypropylene can be softer than other two kinds of materials, can judge what kind of material the plastic suction pipe belongs to through the mode of burning or high temperature poaching, the polypropylene can appear the smell of a petroleum after burning, the polyethylene appears the smell of paraffin, and polyvinyl chloride burning can produce the poison gas, consequently can utilize polyvinyl chloride to contain the characteristic of halogen (chlorine), the copper wire end of burning red is stained with a bit and is surveyed the suction pipe sample, again with this copper wire end place on gas stove fire, if the material of this suction pipe sample contains chlorine, the colour of flame can turn into green.
For example, when a hot beverage is sucked, the plasticizer is easily released into the beverage due to the influence of high temperature, and when a user drinks the hot beverage, the plasticizer enters into the human body, which affects the health of the human body. In view of the fact that the ecological environment of the earth is seriously affected by the degree of using plastic products at present, plastic straws are scattered all over the world due to the characteristic of being nondegradable for ten thousand years, and particularly, the plastic straws falling into the ocean cause harm and influence on marine organisms, such as turtles or large mammals in the ocean, are common victims of the plastic straws and further influence the ecological balance of the ocean.
Disclosure of Invention
In view of the above, the present invention provides an environmental protection straw and a method for manufacturing the same.
In order to achieve the above object, the present invention provides a method for manufacturing an environmental protection straw, comprising the steps of:
s10, adding high-toughness polylactic acid particles and transparent starch particles into an internal mixer to be mixed at a high temperature of 110-170 ℃ to form transparent polylactic acid blocks;
s20, taking out the transparent polylactic acid block from the internal mixer, and putting the transparent polylactic acid block into a granulation screw machine to prepare a plurality of transparent polylactic acid particles;
s30, adding a plurality of transparent polylactic acid particles into a screw extruder to be heated and melted;
s40, extruding a strip-shaped transparent plastic pipe by using a screw extruder, arranging a first water outlet pipe, a second water outlet pipe and a third water outlet pipe at intervals around an extrusion port, flushing the strip-shaped transparent plastic pipe by using water flow with the water temperature of 60 +/-5 ℃ through the first water outlet pipe, flushing the strip-shaped transparent plastic pipe by using water flow with the water temperature of 80 +/-5 ℃ through the second water outlet pipe, stretching and extending the strip-shaped transparent plastic pipe, and flushing the third water outlet pipe by using cold water with the water temperature of 5 +/-2 ℃ to shape the strip-shaped transparent plastic pipe;
s50, cutting the strip-shaped transparent plastic pipe by using a pipe cutting machine to finish manufacturing the environment-friendly suction pipe.
Preferably, in step S10, the mass ratio of the high-toughness polylactic acid particles to the transparent starch particles is 3:7, 4:6 or 5: 5.
Preferably, in step S10, the method for preparing transparent starch granules includes the following steps:
S11A, cooking the plant fibers to form transparent blocks;
S12A, putting the transparent block into a mixing roll, adding 3-5 wt% of glycerate, and mixing to form a transparent starch block;
S13A, kneading and shearing the transparent starch blocks by using a screw extruder to prepare and form a plurality of transparent starch granules.
Preferably, in step S10, the method for preparing the high-toughness polylactic acid particles includes the following steps:
S11B, catalyzing high-molecular starch polylactic acid to change the high-molecular starch polylactic acid into a plastic starch polylactic acid master batch;
S12B, adding starch polylactic acid master batch and glycerol acetate accounting for 2-5 wt% of the mass ratio into a screw extruder;
S13B, heating the starch polylactic acid master batch which is dipped with 2 wt% -5 wt% of acetic acid glycerol at a high temperature of 180-220 ℃ in a screw extruder, kneading and shearing to prepare a plurality of high-toughness polylactic acid particles.
Preferably, in step S12A, the glycerate is used to crosslink the molecular structure of the transparent mass to form a transparent starch mass.
In order to achieve the above object, the present invention further provides an environment-friendly straw, which is made of a plurality of high-toughness polylactic acid particles and a plurality of transparent starch particles, wherein the mass ratio of the high-toughness polylactic acid particles to the transparent starch particles is 3:7, 4:6 or 5: 5; the plurality of high-toughness polylactic acid particles are prepared from starch polylactic acid master batch and glycerol acetate accounting for 2 wt% -5 wt% of the mass ratio; the plurality of transparent starch granules are prepared from transparent block-shaped substances of plant fibers and glycerate with the mass ratio of 3-5 wt%.
Preferably, the environment-friendly straw is a hollow long tube, and the opening part of the free end of the environment-friendly straw is in a flat shape, an inclined shape or a spoon shape.
Preferably, the environmental protection straw is provided with a telescopic section at the opening part adjacent to the other free end, and the telescopic section is opposite to the opening part of the free end in a flat shape, an inclined shape or a spoon shape.
The invention has the following beneficial effects:
adding high-toughness polylactic acid particles and transparent starch particles into an internal mixer according to a proper mass ratio for high-temperature mixing to form transparent polylactic acid blocks; the transparent polylactic acid block is put into a granulating screw machine to prepare a plurality of transparent polylactic acid particles, and the environment-friendly straw which can be biologically decomposed can be prepared by utilizing the plurality of transparent polylactic acid particles so as to avoid the pollution of environmental ecology, and the polylactic acid particles and the transparent starch particles are both natural materials and cannot be influenced by high temperature to release toxic substances, so that a user can use the environment-friendly straw without influencing the body;
the present invention utilizes the steps S11A to S13A to form a plurality of transparent starch granules with high light transmittance, and utilizes the steps S11B to S13B to form a plurality of high-toughness polylactic acid granules with high temperature resistance, and the light transmittance and the heat resistance of the environmental protection straw (which can resist up to 120 ℃) can be changed by adjusting the mass ratio of the high-toughness polylactic acid granules to the transparent starch granules.
The opening part of the free end of the environment-friendly straw can be flat, inclined or spoon-shaped, in other words, the environment-friendly straw can be applied in multiple ways, the inclined and flat opening parts can be applied to bottled drinks or sealed cup drinks, and the spoon-shaped opening part can be used for digging ice foods and the like.
Drawings
FIG. 1 is a block diagram of the manufacturing method of the environmental straw according to the present invention;
FIG. 2 is a schematic diagram of the internal mixer of the present invention mixing transparent polylactic acid blocks;
FIG. 3 is a schematic view of a pelletizing screw machine of the present invention for making transparent polylactic acid pellets;
FIG. 4 is a schematic view of the screw extruder of the present invention for making a straw for environmental protection;
FIG. 5 is a flow chart of a method of making transparent starch granules according to the present invention;
FIG. 6 is a schematic diagram of the mixer of the present invention mixing a transparent starch mass;
FIG. 7 is a schematic view of a screw extruder of the present invention for making transparent starch granules;
FIG. 8 is a flow chart of a method of making high tenacity polylactic acid particles in accordance with the present invention;
FIG. 9 is a schematic diagram of a screw extruder for producing high tenacity polylactic acid pellets in accordance with the present invention;
FIG. 10 is a schematic view showing various states of the eco-straw according to the present invention.
Wherein:
screw extruder-1; high-toughness polylactic acid particles-10; starch polylactic acid master batch-11; glycerol acetate-12;
an internal mixer-2; transparent starch granules-20; transparent starch block-21; transparent block-22; glycerate-23;
a pipe cutter-3; transparent polylactic acid particles-30; transparent polylactic acid block-31;
mixing roll-4; a strip-shaped transparent plastic pipe-40;
a granulation screw machine-5; an environment-friendly straw-50; a free end opening-51; a bending section-52;
a first outlet pipe-T1; a second outlet pipe-T2; and a third water outlet pipe-T3.
Detailed Description
In order to make the aforementioned and other objects, features and characteristics of the present invention comprehensible, embodiments accompanied with the figures are described in detail below.
Referring to fig. 1 to 4 and 10, the present invention provides an environmental protection straw and a method for manufacturing the same, which includes the following steps:
s10, adding the high-toughness polylactic acid particles 10 and the transparent starch particles 20 into an internal mixer 2, and mixing at a high temperature of 110-170 ℃ to form a transparent polylactic acid block 31;
s20, taking out the transparent polylactic acid block 31 from the internal mixer 2, and putting the transparent polylactic acid block into a granulation screw machine 5 to prepare a plurality of transparent polylactic acid particles 30;
s30, adding a plurality of transparent polylactic acid particles 30 into a screw extruder 1 for heating;
s40, extruding the strip-shaped transparent plastic pipe 40 by the screw extruder 1, arranging a first water outlet pipe T1, a second water outlet pipe T2 and a third water outlet pipe T3 at intervals around an extrusion port, flushing the strip-shaped transparent plastic pipe 40 by using water flow with the water temperature of 60 +/-5 ℃ through the first water outlet pipe T1, flushing the strip-shaped transparent plastic pipe 40 by using water flow with the water temperature of 80 +/-5 ℃ through the second water outlet pipe T2, stretching and extending the strip-shaped transparent plastic pipe 40, and flushing the third water outlet pipe T3 by using cold water with the temperature of 5 +/-2 ℃ to shape the strip-shaped transparent plastic pipe 40;
s50, cutting the strip-shaped transparent plastic pipe 40 by using a pipe cutting machine 3 to complete the manufacture of the environment-friendly suction pipe 50; further, in step S10, the mass ratio of the high-toughness polylactic acid particles 10 to the transparent starch particles 20 is 3:7, 4:6 or 5:5, and the eco-straw 50 is a hollow long tube, one free end opening 51 of the eco-straw can be in a flat mouth shape, an inclined mouth shape or a spoon shape, and the eco-straw can be provided with a bending section 52 adjacent to the other free end opening 51, opposite to the flat mouth shape, the inclined mouth shape or the spoon shape free end opening 51.
Referring to fig. 5 to 9, the method for manufacturing transparent starch granules in step S10 includes the following steps:
S11A, cooking the plant fibers at high temperature to form a transparent block 22;
S12A, putting the transparent block 22 into a mixing mill 4, adding 3-5% by mass of glycerate 23, and performing high-heat-pressure mixing to form a transparent starch block 21;
S13A, kneading and shearing the transparent starch block 21 at a high speed by using a screw extruder to prepare a plurality of transparent starch granules 20;
in addition, the method for manufacturing the high-toughness polylactic acid particles in step S10 includes the steps of:
S11B, catalyzing high-molecular starch polylactic acid at high temperature and high pressure to change the high-molecular starch polylactic acid into a plastic starch polylactic acid master batch;
S12B, adding a starch polylactic acid master batch 11 and acetic acid glycerol 12 accounting for 2-5% of the mass ratio into a screw extruder 1;
S13B, heating and dipping a starch polylactic acid master batch 11 attached with 2 wt% -5 wt% of acetin 12 at a high temperature of 180-220 ℃ in a screw extruder 1, kneading and shearing to prepare a plurality of high-toughness polylactic acid particles 10.
According to the starch polylactic acid master batch prepared through high-temperature and high-pressure catalysis in the upper section, the internal molecular chain structure of the starch polylactic acid master batch is damaged, so that the starch polylactic acid master batch is not tough and ductile and is difficult to utilize, and the molecular chain structure in the starch polylactic acid can be re-stretched and linked by adding 2-5 wt% of glycerol acetate and kneading and shearing of a screw extruder, so that the high-toughness polylactic acid master batch is formed, the original light transmission characteristic can be maintained, and the high-temperature 120-DEG C resistant characteristic is also achieved; in addition, through the manufacturing steps of the transparent starch granules and the manufacturing method of the high-toughness polylactic acid granules, the main materials of the environment-friendly straw provided by the invention are natural materials such as starch polylactic acid, plant fiber and the like, so that the biological decomposable effect can be achieved, and no toxic substance is released when the high-temperature beverage is drunk, so that the environmental safety and the human health are guaranteed.
With the structure of the above-described embodiment, the following effects can be obtained:
firstly, adding high-toughness polylactic acid particles and transparent starch particles into an internal mixer according to a proper mass ratio for high-temperature mixing to form a transparent polylactic acid block; the transparent polylactic acid block is put into a granulating screw machine to prepare a plurality of transparent polylactic acid particles, and the environment-friendly straw which can be biologically decomposed can be prepared by utilizing the plurality of transparent polylactic acid particles so as to avoid the pollution of environmental ecology, and the polylactic acid particles and the transparent starch particles are both natural materials and cannot be influenced by high temperature to release toxic substances, so that a user can safely use the environment-friendly straw without influencing the body;
secondly, the plurality of transparent starch granules prepared and formed by the steps S11A to S13A have the characteristic of high light transmission, while the plurality of high-toughness polylactic acid granules prepared and formed by the steps S11B to S13B have the characteristic of high temperature resistance, and the light transmission and the heat resistance degree (the highest resistance to 120 ℃) of the environment-friendly straw can be changed by adjusting the mass ratio of the high-toughness polylactic acid granules to the transparent starch granules;
the opening part of the free end of the environment-friendly straw can be flat mouth shape, bevel mouth shape or spoon shape, in other words, the environment-friendly straw can be applied in multiple ways, the bevel mouth shape and the bevel mouth shape opening part can be applied to bottled drinks or sealed cup drinks, and the spoon shape opening part can be used for digging ice food and the like.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; therefore, all the equivalent changes and modifications made according to the protection scope of the present patent application should fall within the protection scope covered by the present patent application.
Claims (8)
1. The manufacturing method of the environment-friendly straw is characterized by comprising the following steps of:
s10, adding high-toughness polylactic acid particles and transparent starch particles into an internal mixer to be mixed at a high temperature of 110-170 ℃ to form transparent polylactic acid blocks;
s20, taking out the transparent polylactic acid block from the internal mixer, and putting the transparent polylactic acid block into a granulation screw machine to prepare a plurality of transparent polylactic acid particles;
s30, adding a plurality of transparent polylactic acid particles into a screw extruder to be heated and melted;
s40, extruding a strip-shaped transparent plastic pipe by using a screw extruder, arranging a first water outlet pipe, a second water outlet pipe and a third water outlet pipe at intervals around an extrusion port, flushing the strip-shaped transparent plastic pipe by using water flow with the water temperature of 60 +/-5 ℃ through the first water outlet pipe, flushing the strip-shaped transparent plastic pipe by using water flow with the water temperature of 80 +/-5 ℃ through the second water outlet pipe, stretching and extending the strip-shaped transparent plastic pipe, and flushing the third water outlet pipe by using cold water with the water temperature of 5 +/-2 ℃ to shape the strip-shaped transparent plastic pipe;
s50, cutting the strip-shaped transparent plastic pipe by using a pipe cutting machine to finish manufacturing the environment-friendly suction pipe.
2. The method for manufacturing the environment-friendly straw according to claim 1, wherein in the step S10, the mass ratio of the high-toughness polylactic acid particles to the transparent starch particles is 3:7, 4:6 or 5: 5.
3. The method for manufacturing an environment-friendly straw as claimed in claim 2, wherein in step S10, the method for manufacturing the transparent starch granules comprises the following steps:
S11A, cooking the plant fibers to form transparent blocks;
S12A, putting the transparent block into a mixing roll, adding 3-5 wt% of glycerate, and mixing to form a transparent starch block;
S13A, kneading and shearing the transparent starch blocks by using a screw extruder to prepare and form a plurality of transparent starch granules.
4. The method for manufacturing an environmental friendly straw as claimed in claim 3, wherein the method for manufacturing the high tenacity polylactic acid granules in step S10 comprises the steps of:
S11B, catalyzing high-molecular starch polylactic acid to change the high-molecular starch polylactic acid into a plastic starch polylactic acid master batch;
S12B, adding starch polylactic acid master batch and glycerol acetate accounting for 2-5 wt% of the mass ratio into a screw extruder;
S13B, heating the starch polylactic acid master batch which is dipped with 2 wt% -5 wt% of acetic acid glycerol at a high temperature of 180-220 ℃ in a screw extruder, kneading and shearing to prepare a plurality of high-toughness polylactic acid particles.
5. The method for manufacturing the environmental friendly straw as claimed in claim 4, wherein in step S12A, the glycerate is used to crosslink the molecular structure of the transparent block to form a transparent starch block.
6. An environment-friendly straw is characterized by being prepared from a plurality of high-toughness polylactic acid particles and a plurality of transparent starch particles, wherein the mass ratio of the high-toughness polylactic acid particles to the transparent starch particles is 3:7, 4:6 or 5: 5; the plurality of high-toughness polylactic acid particles are prepared from starch polylactic acid master batch and glycerol acetate accounting for 2 wt% -5 wt% of the mass ratio; the plurality of transparent starch granules are prepared from transparent block-shaped substances of plant fibers and glycerate with the mass ratio of 3-5 wt%.
7. The environmentally friendly straw as claimed in claim 6, wherein the environmentally friendly straw is a hollow long tube, and the opening part of the free end of the environmentally friendly straw is in a shape of a flat mouth, an inclined mouth or a spoon.
8. The reusable straw as claimed in claim 7, wherein the reusable straw is provided with a retractable section adjacent to the other free end opening, the retractable section being opposite to the flat, beveled or spoon shaped free end opening.
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| CN201910040690.6A CN111438910A (en) | 2019-01-16 | 2019-01-16 | Environment-friendly straw and manufacturing method thereof |
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| CN201910040690.6A CN111438910A (en) | 2019-01-16 | 2019-01-16 | Environment-friendly straw and manufacturing method thereof |
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Cited By (1)
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| CN112778723A (en) * | 2020-12-31 | 2021-05-11 | 武汉华丽环保科技有限公司 | Starch-based degradable desorption tube material and preparation method thereof |
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Application publication date: 20200724 |
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