CN110903615A - Agricultural black full-biological controllable degradable plastic lifting rope and preparation method thereof - Google Patents
Agricultural black full-biological controllable degradable plastic lifting rope and preparation method thereof Download PDFInfo
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- CN110903615A CN110903615A CN201911189398.7A CN201911189398A CN110903615A CN 110903615 A CN110903615 A CN 110903615A CN 201911189398 A CN201911189398 A CN 201911189398A CN 110903615 A CN110903615 A CN 110903615A
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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
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention belongs to the field of agricultural biodegradable high polymer materials, and particularly relates to an agricultural black full-biological controllable degradable plastic lifting rope and a preparation method thereof, wherein the lifting rope consists of full-biological degradable resin, an easy-processing auxiliary agent, a reinforcing and toughening auxiliary agent and carbon black, and the problems of poor mechanical strength, easy breakage and overhigh elongation at break of the agricultural full-biological controllable degradable lifting rope are solved by adding the reinforcing and toughening auxiliary agent; the easy processing auxiliary agent solves the problems that the reinforcing and toughening auxiliary agent is difficult to disperse and the rope belt is difficult to cut and strip; the carbon black and the stability auxiliary agent solve the problem of poor weather resistance of the agricultural full-biological controllable degradable plastic lifting rope; the variety and the proportion of the full-biodegradable resin are optimized, the functional auxiliary agent is combined to develop the agricultural black full-biodegradable controllable degradable lifting rope with the gram weight of 1-2m and the adjustable function duration of 6-12 months, the minimum breaking strength of the agricultural full-biodegradable controllable degradable lifting rope is more than 20daN, the breaking elongation is less than 20%, and the degradation performance meets the national standard requirements of agricultural full-biodegradable products.
Description
Technical Field
The invention belongs to the field of agricultural biodegradable high polymer materials, and particularly relates to an agricultural black full-biological controllable degradable plastic lifting rope and a preparation method thereof.
Background
The lifting rope plays an important auxiliary role in the production of crops such as vegetables, is hung on a vegetable cultivation frame or a lifting rope hanging rod (rope) to help vegetable stems (seedling vines) to grow upwards and bear load, and therefore the effects of ventilation, light transmission, yield increase and convenience in picking are achieved, however, the common plastic lifting rope adopted at present is a polyolefin lifting rope which is difficult to degrade. After the lifting rope materials are used, the lifting rope materials are mixed with stems (seedling vines) of crops such as vegetables and the like and are difficult to separate, so that the stems and the seedlings cannot be recycled, the agricultural sustainable development is directly influenced, and the agricultural environment plastic pollution and ecological hidden danger are caused. The agricultural black full-biological controllable degradable plastic lifting rope is formed by extruding, stretching and processing full-biological degradable plastics, the full-biological degradable plastics can be completely decomposed by microorganisms, and the final products of the degradation are carbon dioxide, water, harmless inorganic materials and trace carbon black, and can be completely absorbed by the natural world.
However, the existing degradation special material encounters a plurality of problems when preparing the lifting rope, the mechanical strength of the lifting rope prepared by the degradation special material is difficult to meet the requirement and continuous processing production is difficult due to the particularity of the degradation material, and the prior art only has precedent of preparing the degradation material into various film materials but never has precedent of preparing the degradation material into a crop stem (seedling vine) lifting rope, so that technical personnel in the field lack corresponding technical bases, are difficult to obtain the degradable plastic lifting rope meeting the agricultural production requirement, are difficult to directly obtain corresponding technical inspiration from the degradable film materials, and the development of the technology is in a blank state in the world, and is one of the problems to be solved in the field.
Disclosure of Invention
Aiming at various defects in the prior art, the invention provides an agricultural black full-biological controllable degradable plastic lifting rope and a preparation method thereof, wherein the agricultural black full-biological controllable degradable plastic lifting rope consists of full-biological degradable resin, easy-to-process auxiliary agent, reinforcing and toughening auxiliary agent and carbon black, and the problems of poor mechanical strength, easy breakage and overhigh elongation at break of the agricultural full-biological controllable degradable lifting rope are solved by adding the reinforcing and toughening auxiliary agent; the easy processing auxiliary agent solves the problems that the reinforcing and toughening auxiliary agent is difficult to disperse and the rope belt is difficult to cut and strip; the carbon black and the stability auxiliary agent solve the problem of poor weather resistance of the agricultural full-biological controllable degradable plastic lifting rope; and by optimizing the type and the proportion of the full-biodegradable resin, the agricultural black full-biodegradable controllable degradable lifting rope with the gram weight of 1-2m and the adjustable function duration of 6-12 months is developed by combining the functional additives, the minimum breaking strength of the agricultural black full-biodegradable controllable degradable lifting rope is more than 20daN, the breaking elongation is less than 20%, and the degradation performance meets the national standard requirements of agricultural full-biodegradable products.
The applicant of the present invention has previously filed several patent applications of biodegradable mulch films, wherein degradable film-forming materials are mainly used as raw materials for preparation, the effect is excellent, and the obtained film materials meet the requirements of the existing agricultural production in various properties, but the inventor finds that the degradable property is well preserved when the technical scheme is used for directly preparing the degradable lifting rope based on the degradable film-forming materials, but other problems also follow in the practical application process. In the prior application of the applicant, the degradable material used as the film material is required to have higher breaking elongation rate and better breaking elongation rate, so that the requirement of the mulching film can be met, and the performance of the mechanical film can be improved, so that the requirement of agricultural mechanization is met, and the inventor finds that the rope is easy to break when the rope is directly applied to the invention purpose of the application, and the production efficiency is directly influenced when the rope is wound at a high winding speed in the secondary hot stretching and winding process in the lifting rope processing process; under the condition of reducing the rolling speed, the obtained lifting rope has larger elongation at break and larger elastic deformation, and can be elongated along with the growth of crops and the weight increment of fruits in the using process, so that the lifting rope cannot play a role in helping vegetable stems (seedling vines) to bear the fruits, and the lifting and binding characteristics of the lifting rope are lost; the breaking strength and the breaking elongation of the plastic product are directly related to the formula composition, the processing process conditions and the product specification. The specifications of processing equipment, processes and products of the degradable agricultural plastic lifting rope and the degradable mulching film are different, so that the related defects of production and processing of the existing degradable plastic lifting rope and products cannot be solved only by matching the technical scheme of the film material applied by the inventor in the prior art with the processing process of the existing agricultural lifting rope, and the invention is a feasible technical scheme obtained by redesigning the technical scheme by the inventor, so that the requirements of processing, application and the like of the controllable degradable plastic lifting rope can be met.
The specific technical scheme of the invention is as follows:
an agricultural black full-biological controllable degradation lifting rope comprises the following main raw material components in parts by weight:
80-91 parts of full biodegradable resin, 5-20 parts of reinforcing and toughening auxiliary agent and 0.5-2 parts of easy processing auxiliary agent; 0.5-2.5 parts of carbon black; 0-1 part of a stability auxiliary agent;
wherein the fully biodegradable resin is one or more of polybutylene terephthalate-adipate, polylactic acid, polypropylene carbonate and polycaprolactone; wherein 50-85 parts of polybutylene terephthalate-adipate is required to be added, and one or two or no other resins are selected to ensure that the total amount of the full-biodegradable resin is 80-91 parts.
The reinforcing and toughening auxiliary agent is one or more of reinforcing and toughening auxiliary agents such as talcum powder, hydrotalcite, flaky quartz, silicon dioxide and the like; the particle size is 1-10 μm;
the inventor finds through a large number of experiments during production that if the reinforcing and toughening auxiliary agent is not added, the rolling rate can be seriously influenced when the thin sheet extruded by the T-shaped die head is stretched for the second time, and the lifting rope is easy to break in the rolling process because the higher the rolling rate is, the greater the force is in the second stretching process; meanwhile, under the condition that the elongation at break of the product is high, if the reinforcing and toughening auxiliary agent is not added, the deformation ratio of the lifting rope is larger, the weight which needs to be borne by the lifting rope is larger and larger along with the passage of time, the deformation is larger and larger, and the rope is continuously aged in the process, so that the performance of the lifting rope cannot meet the use requirement, and therefore the inventor determines the reinforcing and toughening auxiliary agent and the addition amount thereof;
the easy processing auxiliary agent is one or two of organic dispersants erucamide, oleamide and EBS;
compared with the prior art, the easy-processing auxiliary agent can make the obtained lifting rope smoother, easy to cut and strip, convenient to process, and can be better adapted to the purpose of the invention of the application in a way that the easy-processing auxiliary agent is obviously different from the easy-processing auxiliary agent in the previous application of the inventor in terms of purpose and alternative substances.
The stability auxiliary agent is an ultraviolet stabilizer.
The carbon black is spinning-grade carbon black, and the ultraviolet stabilizer is steric hindrance amine stabilizer
5050H、
2020；
Meanwhile, the carbon black or the carbon black and the ultraviolet light stabilizer are independently used and compounded, so that the effective duration of the function of the degradable lifting rope can be adjusted to 6-12 months; the method is realized by the following specific steps:
the carbon black can be singly added or compounded with an ultraviolet light stabilizer, the aim of the carbon black is to weaken the aging effect of ultraviolet rays on the degradation rope and prolong the function duration of the degradation lifting rope, and through the long-term test of an inventor, if the carbon black is singly added, the function duration can be kept for about 6-8 months; if the carbon black and the ultraviolet light stabilizer are added in a compounding way, the functional lasting period can be kept for about 9-12 months; therefore, the controllable functional duration can be realized by adjusting the components according to specific needs;
the particle size of the talc powder, hydrotalcite, quartz flakes and silica is 1 to 10 μm, the reinforcing and toughening aid is not easy to process due to too large addition amount, the screw slips, and the effect is not obvious due to too small addition amount, while the smaller the size of the aid is, the better the effect is, the smaller the size is, the higher the price is, and therefore the balance between the overall cost and the effect is preferred.
In addition, the existing sling rope preparation method is not suitable for the purpose of the application, so the inventor provides a brand-new sling rope preparation process which is adaptive to the component proportion, and the concrete steps are as follows:
(1) uniformly mixing the full-biodegradable resin, the reinforcing and toughening auxiliary agent, the easy-processing auxiliary agent, the carbon black and the stability auxiliary agent according to the weight part ratio in a high-speed stirrer, then putting the mixture into a double-screw extruder, extruding the mixture at the temperature of 135-plus 170 ℃, and carrying out air cooling granulation to obtain the special material for processing the agricultural full-biological controllable degradable lifting rope;
(2) putting the special material for processing the agricultural black full-biological controllable degradable lifting rope into a T-shaped die head extruder for plasticizing extrusion, cutting, hot stretching, wherein the stretching ratio is 3-6, and the agricultural black full-biological controllable degradable plastic lifting rope with the weight of 1-2/m can be obtained;
wherein the die gap of the T-shaped die head extruder is 1-2mm, the plasticizing extrusion temperature is 150-175 ℃, and the hot stretching temperature is 70-110 ℃.
The process is obviously different from the membrane material process in the prior application of the inventor, and in order to be matched with the purpose of controllably degrading the plastic lifting rope, the inventor redefines the parameters in the process, and fills the blank of the prior art.
Compared with the prior art for manufacturing ropes by using polyethylene materials and polypropylene materials, the formula and the process have the advantages that:
1. the process method can produce the degradable lifting rope with the film thickness of 0.3-1.0mm and the width of 1-3cm at relatively low melting temperature, mainly under the condition that the temperature of each section of the screw is relatively low, can directly use conventional equipment for processing the plastic lifting rope, can normally produce the biodegradable lifting rope provided by the application only by changing the processing conditions according to the method, and greatly reduces the processing cost of the lifting rope and the universality of processing equipment.
2. The reinforcing and toughening auxiliary agent is adopted, so that the mechanical property is improved (the minimum breaking strength is more than 20daN, the functional effective period strength meets the requirement of a lifting rope for crop production), the breaking elongation is less than 20%, and the stability of the product performance is improved.
3. The technological method adopts the easily-processed auxiliary agent, so that the auxiliary agents are uniformly dispersed in the plasticizing processing process of the special material for the degradable lifting rope, the extrusion stretching or film blowing processability is stable, and the opening of the membrane is smooth and easy to cut.
4. The degradable lifting rope is compounded by adopting carbon black and a stability auxiliary agent, so that the weather resistance of the degradable lifting rope is improved, and the functional duration of the degradable lifting rope is adjustable within 6-12 months.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but it should not be construed that the scope of the above subject matter is limited to the following examples. All the technologies realized based on the above contents of the present invention belong to the scope of the present invention, and the following embodiments are all completed by adopting the conventional prior art except for the specific description.
Example 1
An agricultural full-biological controllable degradation lifting rope comprises the following raw materials in parts by weight:
the preparation method comprises the following steps:
step 1, putting the components into a high-speed stirrer for stirring and mixing, wherein the components are not required to be heated and mixed for 5-8 minutes;
step 2, extruding the mixed material obtained in the step l at the temperature of 135-170 ℃ through a double-screw granulator, and performing air cooling granulation to obtain the special material for the fully biodegradable lifting rope;
step 3, putting the special material in the step 2 into a T-shaped die head plasticizing extruder for plasticizing and extruding, wherein the plasticizing temperature is 150-; the die gap is 1.5 mm; cutting the cut materials with the same size (3cm) by plasticizing extrusion, and performing hot stretch forming by hot stretch equipment with the stretch ratio of 4.6 to obtain the black full-biodegradable lifting rope with the thickness of 0.65mm and the width of 1.5 cm.
Example 2
An agricultural full-biological controllable degradation lifting rope comprises the following raw materials in parts by weight:
the preparation method comprises the following steps:
step 1, putting the components into a high-speed stirrer for stirring and mixing, wherein the components are not required to be heated and mixed for 2-8 minutes;
step 2, extruding the mixed material obtained in the step 1 at the temperature of 135-170 ℃ through a double-screw granulator, and performing air cooling granulation to obtain the special material for the fully biodegradable lifting rope;
step 3, the special material for the lifting rope is put into a plasticizing extruder for plasticizing, extruding and blow molding, wherein the plasticizing temperature is 150-175 ℃, and the gap of a mold opening is 1.8 mm; the thickness of the formed film is 1.5mm, the film is cut in equal size (3cm), and then the cut film is subjected to hot stretch forming by hot stretch equipment, the stretch ratio is 4.0, and the black full-biodegradable lifting rope with the thickness of 0.75mm and the width of 1.5cm is obtained.
Example 3
An agricultural full-biological controllable degradation lifting rope comprises the following raw materials in parts by weight:
the preparation method comprises the following steps:
step 1, putting the components into a high-speed stirrer for stirring and mixing, wherein the components are not required to be heated and mixed for 2-8 minutes;
step 2, extruding the mixed material obtained in the step l at the temperature of 135-170 ℃ through a double-screw granulator, and performing air cooling granulation to obtain the special material for the fully biodegradable lifting rope;
step 3, the special material for the lifting rope is put into a plasticizing extruder for plasticizing, extruding and blow molding, wherein the plasticizing temperature is 150-175 ℃, and the gap of a mold opening is 1.8 mm; the thickness of the formed film is 1.5mm, the film is cut in equal size (3cm), and then the cut film is subjected to hot stretch forming by hot stretch equipment, the stretch ratio is 4.0, and the black full-biodegradable lifting rope with the thickness of 0.75mm and the width of 1.5cm is obtained.
Examples of the experiments
According to the measurement of the tensile property of the plastic, the tensile rate is 200mm/min, the agricultural black full-biological controllable degradable lifting rope obtained by the invention, the degradable lifting rope prepared by adopting the formula of the degradable mulching film material previously applied by the inventor of the invention and the conventional polyethylene and polypropylene lifting ropes are subjected to relevant detection and performance experiments, and the performances are shown in table 1.
According to the above table, the breaking strength and the breaking elongation of the agricultural black full-biological controllable degradable lifting rope provided by the application are better than those of a degradable lifting rope prepared by a degradable mulching film material formula previously applied by the inventor, the standard of the existing polyethylene and polypropylene lifting rope can be basically achieved, the controllability on the function duration is realized, the function duration time of the degradable lifting rope prepared by the degradable mulching film material formula previously applied by the inventor is obviously prolonged, the degradable lifting rope can be completely degraded, and the degradable lifting rope is better than that of a non-degradable lifting rope of polyethylene and polypropylene, so that the blank in the field is filled.
Claims (6)
1. An agricultural black full-biological controllable degradable plastic lifting rope is characterized in that: the main components are as follows by weight:
80-91 parts of full biodegradable resin, 5-20 parts of reinforcing and toughening auxiliary agent and 0.5-2 parts of easy processing auxiliary agent; 0.5-2.5 parts of carbon black; 0-1 part of a stability auxiliary agent;
wherein the fully biodegradable resin is one or more of polybutylene terephthalate-adipate, polylactic acid, polypropylene carbonate and polycaprolactone;
the reinforcing and toughening auxiliary agent is one or more of reinforcing and toughening auxiliary agents such as talcum powder, hydrotalcite, flaky quartz, silicon dioxide and the like;
the stability auxiliary agent is an ultraviolet light stabilizer.
2. The agricultural black full-biological controllable degradable plastic lifting rope according to claim 1, characterized in that:
the grain size of the reinforcing and toughening auxiliary agent is 1-10 mu m.
3. The agricultural black full-biological controllable degradable plastic lifting rope according to claim 1, characterized in that:
the easy processing auxiliary agent is one or two of organic dispersants erucamide, oleamide and EBS.
4. The agricultural black full-biological controllable degradable plastic lifting rope according to claim 1, characterized in that:
the carbon black is spinning-grade carbon black, and the ultraviolet stabilizer is steric hindrance amine stabilizer
5050H or
2020。
5. The preparation method of the agricultural black full-biological controllable degradable plastic lifting rope of claim 1 is characterized by comprising the following steps: the method comprises the following specific steps:
(1) uniformly mixing the full-biodegradable resin, the reinforcing and toughening auxiliary agent, the easy-processing auxiliary agent, the carbon black and the stability auxiliary agent according to the weight part ratio in a high-speed stirrer, then putting the mixture into a double-screw extruder, extruding the mixture at the temperature of 135-plus 170 ℃, and performing air cooling granulation to obtain the special material for processing the agricultural black full-biological controllable degradable lifting rope;
(2) the special material for processing the agricultural black full-biological controllable degradable lifting rope is put into a T-shaped die head extruder for plasticizing extrusion, cutting and hot stretching, and the stretching ratio is 3-6, so that the agricultural black full-biological controllable degradable plastic lifting rope with the weight of 1-2/m can be obtained.
6. The agricultural black full-biological controllable degradable plastic lifting rope according to claim 5, characterized in that: the die gap of the T-type die head extruder is 1-2mm, the plasticizing extrusion temperature is 150-175 ℃, and the hot stretching temperature is 70-110 ℃.
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| CN201911189398.7A CN110903615A (en) | 2019-11-27 | 2019-11-27 | Agricultural black full-biological controllable degradable plastic lifting rope and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114015203A (en) * | 2021-10-14 | 2022-02-08 | 寿光金远东变性淀粉有限公司 | Preparation method of starch-based full-biodegradable plastic lifting rope for greenhouse vegetable cultivation |
| CN114539736A (en) * | 2022-03-23 | 2022-05-27 | 浙江家乐蜜园艺科技有限公司 | Full-biodegradable vine climbing rope based on straw returning and preparation method thereof |
-
2019
- 2019-11-27 CN CN201911189398.7A patent/CN110903615A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114015203A (en) * | 2021-10-14 | 2022-02-08 | 寿光金远东变性淀粉有限公司 | Preparation method of starch-based full-biodegradable plastic lifting rope for greenhouse vegetable cultivation |
| CN114015203B (en) * | 2021-10-14 | 2023-08-18 | 寿光金远东变性淀粉有限公司 | Preparation method of starch-based full-biodegradable plastic lifting rope for greenhouse vegetable cultivation |
| CN114539736A (en) * | 2022-03-23 | 2022-05-27 | 浙江家乐蜜园艺科技有限公司 | Full-biodegradable vine climbing rope based on straw returning and preparation method thereof |
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