阅读说明：本技术 一种可降解再生包装材料、制备方法及设备 (Degradable regenerated packaging material, preparation method and equipment ) 是由 陈之善 刘林羊 马晓阳 叶锦强 汤汉良 于 2019-11-23 设计创作，主要内容包括：本发明公开了一种可降解再生包装材料,其特征在于,其由以下重量比的组分制备而成：热塑性淀粉22～35份,木质纤维15～20份,竹纤维10～14份,聚乳酸纤维6～11份,PVA18～24份,纳米二氧化硅3～6份,相容剂2～3份,润滑剂1～3份,抗氧剂0.6～1.2份,增塑剂1～5份,聚己内酯6～12份。本发明还公开了其制备方法及设备。本发明重点通过同时改进可降解再生包装材料、制备方法及设备,使其达到在具有高可降解性的同时,综合理化性能好,使其具有高拉伸性和扩展性,从而可适用多种环境下,且成本低、易于产业化。(The invention discloses a degradable regenerated packaging material which is characterized by being prepared from the following components in parts by weight: 22-35 parts of thermoplastic starch, 15-20 parts of wood fiber, 10-14 parts of bamboo fiber, 6-11 parts of polylactic acid fiber, 18-24 parts of PVA, 3-6 parts of nano silicon dioxide, 2-3 parts of compatilizer, 1-3 parts of lubricant, 0.6-1.2 parts of antioxidant, 1-5 parts of plasticizer and 6-12 parts of polycaprolactone. The invention also discloses a preparation method and equipment thereof. The invention focuses on simultaneously improving the degradable regenerated packaging material, the preparation method and the equipment, so that the degradable regenerated packaging material has high degradability, good comprehensive rationalization performance and high stretchability and expansibility, thereby being applicable to various environments, having low cost and being easy to industrialize.)

1. The degradable regenerated packaging material is characterized by being prepared from the following components in parts by weight:

22-35 parts of thermoplastic starch, 15-20 parts of wood fiber, 10-14 parts of bamboo fiber, 6-11 parts of polylactic acid fiber, 18-24 parts of PVA, 3-6 parts of nano silicon dioxide, 2-3 parts of compatilizer, 1-3 parts of lubricant, 0.6-1.2 parts of antioxidant, 1-5 parts of plasticizer and 6-12 parts of polycaprolactone.

2. The preparation method of the degradable regenerated packaging material is characterized by comprising the following steps:

preparing 22-35 parts of thermoplastic starch, 15-20 parts of wood fiber, 10-14 parts of bamboo fiber, 6-11 parts of polylactic acid fiber, 18-24 parts of PVA, 3-6 parts of nano silicon dioxide, 2-3 parts of a compatilizer, 1-3 parts of a lubricant, 0.6-1.2 parts of an antioxidant, 1-5 parts of a plasticizer and 6-12 parts of polycaprolactone;

adding 15-20 parts of wood fiber, 10-14 parts of bamboo fiber and 18-24 parts of PVA into a high-speed stirrer (1), and stirring for 15-25 min at a stirring speed of 650-900 r/min to obtain a mixture A;

adding 22-35 parts of thermoplastic starch, 6-11 parts of polylactic acid fiber, 3-6 parts of nano silicon dioxide and 0.6-1.2 parts of antioxidant into a reaction kettle (2), controlling the temperature of the reaction kettle (2) at 220-240 ℃, and stirring for 20-30 min at a stirring speed of 400-550 r/min to obtain a mixture B;

adding the mixture A obtained in the step (II) into the reaction kettle (2) obtained in the step (III) to be mixed and stirred with the mixture B, and simultaneously adding 2-3 parts of a compatilizer, wherein the stirring temperature is 80-120 ℃, the stirring speed is 300-350 r/min, and the stirring time is 15-25 min to obtain a mixture C;

fifthly, adding the mixture C obtained in the step four into an internal mixer (3), simultaneously adding 1-3 parts of a lubricant and 1-5 parts of a plasticizer, and mixing for 2-3 hours at 200-240 ℃ to obtain a mixture D;

sixthly, putting the mixture D obtained in the step five into a double-screw extruder (4) for extrusion granulation, wherein the temperature in the extrusion treatment process is divided into three parts, the first part is 180-195 ℃, the second part is 200-210 ℃, the third part is 190-200 ℃, the head temperature is 190-205 ℃, and the screw rotation speed is 20-35 r/min, so that a material E is obtained;

and (seventhly), performing film blowing treatment on the material E through a film blowing machine (5) to obtain the degradable regenerated packaging film.

3. The method for preparing degradable regenerated packaging material according to claim 2, characterized in that the thermoplastic starch is thermoplastic corn starch and thermoplastic sweet potato starch.

4. The preparation method of the degradable regenerated packaging material as claimed in claim 2, wherein the wood fiber and the bamboo fiber are both sieved by a 200-260 mesh sieve.

5. The method for preparing the degradable and renewable packaging material of claim 2, wherein the compatilizer is polypropylene grafted maleic anhydride or polysorbate.

6. The method of preparing a degradable and recyclable packaging material as described in claim 2, wherein the lubricant is one or more of ethylene bis-oleic acid amide, stearic acid, and calcium stearate.

7. The method for preparing the degradable and renewable packaging material of claim 2, wherein the antioxidant is antioxidant 1010.

8. The method for preparing the degradable renewable packaging material of claim 2, wherein the plasticizer is one of epoxidized soybean oil, citric acid or glycerol.

9. A device for preparing degradable regenerated packaging materials for implementing the method of any one of claims 2 to 8, which comprises a high-speed stirrer (1), a reaction kettle (2), an internal mixer (3), a double-screw extruder (4) and a film blowing machine (5) which are connected in sequence, wherein the high-speed stirrer (1) is communicated with the inside of the reaction kettle (2) through a pump pipeline, the reaction kettle (2) is communicated with the inside of the internal mixer (3) through a pump pipeline, the internal mixer (3) is communicated with a feed inlet of the double-screw extruder (4) through a material channel, and the double-screw extruder (4) is communicated with the inside of the film blowing machine (5) through a pipeline.

Technical Field

The invention relates to the technical field of packaging materials, in particular to a degradable regenerated packaging material, a preparation method and equipment.

Background

With the increase of the use of plastic film products, a great deal of pollution is brought to the natural environment, the conventional plastic film products, such as plastic films made of polypropylene, polyvinyl chloride, polyethylene and the like, cannot be naturally degraded in the natural environment, and still exist in the natural environment after being placed for many years, and the plastic films which cannot be degraded increase the environmental pollution.

With the enhancement of environmental awareness in various industries, degradable film plastics gradually become a mainstream development trend, and with the continuous deepening of scientific research, various novel degradable film plastics are also generated.

Chinese patent (CN201611075267.2) discloses an antibacterial degradable food packaging material and a preparation method thereof, essential oil and starch are used as main materials, and the antibacterial degradable food packaging material is prepared by matching a lubricant, a coupling agent and a plasticizer and extruding and blowing a film.

In the prior art, degradable regenerated packaging materials, preparation methods and equipment are often not adaptive to each other, the comprehensive physical and chemical properties of the materials are poor, the stretchability and expansibility are low, the applicable environment is less, the cost is high, and the industrialization is not easy to realize.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a degradable regenerated packaging material, a preparation method and equipment, which are improved simultaneously, so that the degradable regenerated packaging material, the preparation method and the equipment have high degradability, good comprehensive and reasonable performance and high stretchability and expansibility, are suitable for various environments, have low cost and are easy to industrialize, and the problems in the background art are solved.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme:

the degradable regenerated packaging material is characterized by being prepared from the following components in parts by weight: 22-35 parts of thermoplastic starch, 15-20 parts of wood fiber, 10-14 parts of bamboo fiber, 6-11 parts of polylactic acid fiber, 18-24 parts of PVA, 3-6 parts of nano silicon dioxide, 2-3 parts of compatilizer, 1-3 parts of lubricant, 0.6-1.2 parts of antioxidant, 1-5 parts of plasticizer and 6-12 parts of polycaprolactone.

A preparation method of a degradable regenerated packaging material comprises the following steps:

preparing 22-35 parts of thermoplastic starch, 15-20 parts of wood fiber, 10-14 parts of bamboo fiber, 6-11 parts of polylactic acid fiber, 18-24 parts of PVA, 3-6 parts of nano silicon dioxide, 2-3 parts of a compatilizer, 1-3 parts of a lubricant, 0.6-1.2 parts of an antioxidant, 1-5 parts of a plasticizer and 6-12 parts of polycaprolactone;

adding 15-20 parts of wood fiber, 10-14 parts of bamboo fiber and 18-24 parts of PVA into a high-speed stirrer, and stirring for 15-25 min at the stirring speed of 650-900 r/min to obtain a mixture A;

adding 22-35 parts of thermoplastic starch, 6-11 parts of polylactic acid fiber, 3-6 parts of nano silicon dioxide and 0.6-1.2 parts of antioxidant into a reaction kettle, controlling the temperature of the reaction kettle at 220-240 ℃, and stirring for 20-30 min at the stirring speed of 400-550 r/min to obtain a mixture B;

adding the mixture A obtained in the step (II) into the reaction kettle obtained in the step (III) to be mixed and stirred with the mixture B, and simultaneously adding 2-3 parts of a compatilizer, wherein the stirring temperature is 80-120 ℃, the stirring speed is 300-350 r/min, and the stirring time is 15-25 min to obtain a mixture C;

fifthly, adding the mixture C obtained in the step four into an internal mixer, simultaneously adding 1-3 parts of lubricant and 1-5 parts of plasticizer, and mixing for 2-3 hours at 200-240 ℃ to obtain a mixture D;

putting the mixture D obtained in the step (five) into a double-screw extruder for extrusion granulation, wherein the temperature in the extrusion treatment process is divided into three parts, the first part is 180-195 ℃, the second part is 200-210 ℃, the third part is 190-200 ℃, the head temperature is 190-205 ℃, and the screw rotation speed is 20-35 r/min, so as to obtain a material E;

and (seventhly), performing film blowing treatment on the material E through a film blowing machine to obtain the degradable regenerated packaging film.

Preferably, the thermoplastic starch is thermoplastic corn starch and thermoplastic sweet potato starch.

Preferably, the wood fibers and the bamboo fibers are sieved by a sieve of 200-260 meshes.

Preferably, the compatilizer is polypropylene grafted maleic anhydride or polysorbate.

Preferably, the lubricant is one or more of ethylene bis-oleic acid amide, stearic acid and calcium stearate.

Preferably, the antioxidant is antioxidant 1010.

Preferably, the plasticizer is one of epoxidized soybean oil, citric acid or glycerol.

The utility model provides a preparation equipment of degradable regeneration packaging material, includes high speed mixer, reation kettle, banbury mixer, double screw extruder and inflation film manufacturing machine that links up in proper order, high speed mixer is linked together through pump line and reation kettle's inside, reation kettle is linked together through pump line and banbury mixer's inside, the banbury mixer is linked together through the feed inlet of material way with double screw extruder, double screw extruder is linked together through the inside of pipeline with the inflation film manufacturing machine.

(III) advantageous effects

Compared with the prior art, the invention provides a degradable regenerated packaging material, a preparation method and equipment, which have the following beneficial effects:

1. the degradable regenerated packaging material, the preparation method and the equipment are improved simultaneously, so that the degradable regenerated packaging material has high degradability, good comprehensive rationalization performance and high stretchability and expansibility, is suitable for various environments, and has low cost and easy industrialization.

2. The packaging material prepared by the invention adopts degradable thermoplastic starch, wood fiber, bamboo fiber and polylactic acid fiber as main materials, has high degradability and good mechanical property, and further improves the comprehensive physical and chemical properties of the packaging material by adding nano silicon dioxide and polycaprolactone, so that the packaging material has high stretchability and expansibility, and can be suitable for various environments.

3. The preparation method and the equipment provided by the invention have the advantages that the preparation process is scientific, the process flow is compact, and the steps are closely linked, so that an efficient preparation scheme is formed; in the preparation process, the wood fiber and the bamboo fiber are mixed with PVA (medical grade polyvinyl alcohol) by stirring, and the bamboo fiber and the wood fiber can be compounded, so that the mechanical property of the packaging material is improved, and the heat insulation performance and the heat preservation performance are improved to a certain extent.

4. The preparation equipment provided by the invention performs optimal arrangement design aiming at material component formula and process flow, and has the advantages of high production efficiency, low cost and easy industrialization.

Drawings

Fig. 1 is a block diagram showing the structural arrangement of the equipment for preparing the degradable regenerated packaging material of the invention.

In the figure: 1. a high-speed stirrer; 2. a reaction kettle; 3. an internal mixer; 4. a twin-screw extruder; 5. a film blowing machine.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the invention serve to explain the principles of the invention.

Example 1

Referring to fig. 1, the degradable and renewable packaging material provided by the invention is prepared from the following components in parts by weight: 22-35 parts of thermoplastic starch, 15-20 parts of wood fiber, 10-14 parts of bamboo fiber, 6-11 parts of polylactic acid fiber, 18-24 parts of PVA, 3-6 parts of nano silicon dioxide, 2-3 parts of compatilizer, 1-3 parts of lubricant, 0.6-1.2 parts of antioxidant, 1-5 parts of plasticizer and 6-12 parts of polycaprolactone.

In the embodiment, the weight ratio of the specific components is as follows: 26 parts of thermoplastic starch, 16 parts of wood fiber, 13 parts of bamboo fiber, 7 parts of polylactic acid fiber, 22 parts of PVA, 3 parts of nano silicon dioxide, 2 parts of compatilizer, 1 part of lubricant, 0.7 part of antioxidant, 2 parts of plasticizer and 7 parts of polycaprolactone.

A preparation method of a degradable regenerated packaging material comprises the following steps:

preparing 26 parts of thermoplastic starch, 16 parts of wood fiber, 13 parts of bamboo fiber, 7 parts of polylactic acid fiber, 22 parts of PVA, 3 parts of nano silicon dioxide, 2 parts of compatilizer, 1 part of lubricant, 0.7 part of antioxidant, 2 parts of plasticizer and 7 parts of polycaprolactone;

secondly, adding 16 parts of wood fiber, 13 parts of bamboo fiber and 22 parts of PVA into a high-speed stirrer 1, and stirring for 20min at the stirring speed of 800r/min to obtain a mixture A;

adding 26 parts of thermoplastic starch, 7 parts of polylactic acid fiber, 3 parts of nano silicon dioxide and 0.7 part of antioxidant into a reaction kettle 2, controlling the temperature of the reaction kettle 2 at 225 ℃, and stirring for 25min at the stirring speed of 430r/min to obtain a mixture B;

fourthly, adding the mixture A obtained in the second step into the reaction kettle 2 obtained in the step 3, mixing and stirring the mixture A and the mixture B, and simultaneously adding 2 parts of compatilizer, wherein the stirring temperature is 100 ℃, the stirring speed is 320r/min, and the stirring time is 20min, so that a mixture C is obtained;

fifthly, adding the mixture C obtained in the step (four) into an internal mixer 3, simultaneously adding 1 part of lubricant and 2 parts of plasticizer, and mixing for 2 hours at 230 ℃ to obtain a mixture D;

sixthly, putting the mixture D obtained in the step five into a double-screw extruder 4 for extrusion granulation, wherein the temperature in the extrusion treatment process is divided into three parts, the first part is 190 ℃, the second part is 205 ℃, the third part is 195 ℃, the head temperature is 195 ℃, and the screw rotation speed is 25r/min, so as to obtain a material E;

and (seventhly), performing film blowing treatment on the material E through a film blowing machine 5 to obtain the degradable regenerated packaging film.

Specifically, the thermoplastic starch is thermoplastic corn starch.

Specifically, both the wood fibers and the bamboo fibers are sieved by a 240-mesh sieve.

Specifically, the compatilizer is polypropylene grafted maleic anhydride.

Specifically, the lubricant is ethylene bisoleic acid amide.

Specifically, the antioxidant is antioxidant 1010.

Specifically, the plasticizer is epoxidized soybean oil.

The utility model provides a preparation equipment of degradable regeneration packaging material, its includes high-speed mixer, reation kettle, banbury mixer, double screw extruder and inflation film manufacturing machine that links up in proper order, high-speed mixer is linked together through pump line and reation kettle's inside, reation kettle is linked together through pump line and banbury mixer's inside, the banbury mixer is linked together through the feed inlet of material way with double screw extruder, double screw extruder is linked together through the inside of pipeline with the inflation film manufacturing machine.

The invention focuses on simultaneously improving the degradable regenerated packaging material, the preparation method and the equipment, so that the degradable regenerated packaging material has high degradability, good comprehensive rationalization performance and high stretchability and expansibility, thereby being applicable to various environments, having low cost and being easy to industrialize.

Example 2

The degradable regenerated packaging material, the preparation method and the equipment provided by the embodiment of the invention are basically the same as the embodiment 1, and the difference is that:

the degradable regenerated packaging material is prepared from the following components in parts by weight: 30 parts of thermoplastic starch, 18 parts of wood fiber, 13 parts of bamboo fiber, 8 parts of polylactic acid fiber, 20 parts of PVA, 4 parts of nano silicon dioxide, 3 parts of compatilizer, 2 parts of lubricant, 1.2 parts of antioxidant, 3 parts of plasticizer and 8 parts of polycaprolactone.

The preparation method of the degradable regenerated packaging material comprises the following steps:

preparing 30 parts of thermoplastic starch, 18 parts of wood fiber, 13 parts of bamboo fiber, 8 parts of polylactic acid fiber, 20 parts of PVA, 4 parts of nano silicon dioxide, 3 parts of compatilizer, 2 parts of lubricant, 1.2 parts of antioxidant, 3 parts of plasticizer and 8 parts of polycaprolactone;

(II) adding 18 parts of wood fiber, 13 parts of bamboo fiber and 20 parts of PVA into a high-speed stirrer 1, and stirring for 20min at the stirring speed of 800r/min to obtain a mixture A;

adding 30 parts of thermoplastic starch, 8 parts of polylactic acid fiber, 4 parts of nano silicon dioxide and 0.9 part of antioxidant into a reaction kettle 2, controlling the temperature of the reaction kettle 2 at 240 ℃, and stirring for 30min at the stirring speed of 500r/min to obtain a mixture B;

fourthly, adding the mixture A obtained in the second step into the reaction kettle 2 obtained in the third step, mixing and stirring the mixture A and the mixture B, and simultaneously adding 3 parts of compatilizer, wherein the stirring temperature is 105 ℃, the stirring speed is 350r/min, and the stirring time is 17min, so that a mixture C is obtained;

fifthly, adding the mixture C obtained in the step (four) into an internal mixer 3, simultaneously adding 2 parts of lubricant and 3 parts of plasticizer, and mixing for 3 hours at 230 ℃ to obtain a mixture D;

sixthly, putting the mixture D obtained in the step five into a double-screw extruder 4 for extrusion granulation, wherein the temperature in the extrusion treatment process is divided into three parts, namely 195 ℃ in the first part, 210 ℃ in the second part, 195 ℃ in the third part, 205 ℃ in the head and 32r/min in the screw rotation speed, so as to obtain a material E;

and (seventhly), performing film blowing treatment on the material E through a film blowing machine 5 to obtain the degradable regenerated packaging film.

Specifically, the thermoplastic starch is thermoplastic sweet potato starch.

Specifically, both the wood fibers and the bamboo fibers are sieved by a 230-mesh sieve.

Specifically, the compatilizer is polysorbate.

Specifically, the lubricant is stearic acid.

Specifically, the antioxidant is antioxidant 1010.

Specifically, the plasticizer is citric acid.

Example 3

The degradable regenerated packaging material, the preparation method and the equipment provided by the embodiment of the invention are basically the same as those of the embodiments 1 and 2, and the differences are as follows:

the degradable regenerated packaging material is prepared from the following components in parts by weight: 32 parts of thermoplastic starch, 18 parts of wood fiber, 12 parts of bamboo fiber, 9 parts of polylactic acid fiber, 22 parts of PVA, 3 parts of nano silicon dioxide, 2 parts of compatilizer, 2 parts of lubricant, 0.8 part of antioxidant, 2 parts of plasticizer and 10 parts of polycaprolactone.

The preparation method of the degradable regenerated packaging material comprises the following steps:

preparing 32 parts of thermoplastic starch, 18 parts of wood fiber, 12 parts of bamboo fiber, 9 parts of polylactic acid fiber, 22 parts of PVA, 3 parts of nano silicon dioxide, 2 parts of compatilizer, 2 parts of lubricant, 0.8 part of antioxidant, 2 parts of plasticizer and 10 parts of polycaprolactone;

secondly, adding 18 parts of wood fiber, 12 parts of bamboo fiber and 22 parts of PVA into a high-speed stirrer 1, and stirring for 23min at the stirring speed of 850r/min to obtain a mixture A;

adding 32 parts of thermoplastic starch, 9 parts of polylactic acid fiber, 3 parts of nano silicon dioxide and 0.8 part of antioxidant into a reaction kettle 2, controlling the temperature of the reaction kettle 2 at 235 ℃, and stirring for 30min at the stirring speed of 480r/min to obtain a mixture B;

fourthly, adding the mixture A obtained in the second step into the reaction kettle 2 obtained in the third step, mixing and stirring the mixture A and the mixture B, and simultaneously adding 2 parts of compatilizer, wherein the stirring temperature is 110 ℃, the stirring speed is 330r/min, and the stirring time is 25min, so that a mixture C is obtained;

fifthly, adding the mixture C obtained in the step (four) into an internal mixer 3, simultaneously adding 2 parts of lubricant and 2 parts of plasticizer, and mixing 2 at 240 ℃ to obtain a mixture D;

sixthly, putting the mixture D obtained in the step five into a double-screw extruder 4 for extrusion granulation, wherein the temperature in the extrusion treatment process is divided into three parts, the first part is 190 ℃, the second part is 200 ℃, the third part is 195 ℃, the head temperature is 200 ℃, and the screw rotation speed is 27r/min, so as to obtain a material E;

and (seventhly), performing film blowing treatment on the material E through a film blowing machine 5 to obtain the degradable regenerated packaging film.

Specifically, the thermoplastic starch is a mixture of thermoplastic corn starch and thermoplastic sweet potato starch.

Specifically, the wood fiber and the bamboo fiber are sieved by a 260-mesh sieve.

Specifically, the compatilizer is a mixture of polypropylene grafted maleic anhydride and polysorbate.

Specifically, the lubricant is calcium stearate, or a mixture of ethylene bis-oleic acid amide, stearic acid and calcium stearate.

Specifically, the antioxidant is antioxidant 1010.

Specifically, the plasticizer is glycerin.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, but any modifications or equivalent variations made according to the technical spirit of the present invention are within the scope of the present invention as claimed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.