CN115491015A - Machine cleaning material for biodegradable material processing equipment and preparation method thereof - Google Patents

Machine cleaning material for biodegradable material processing equipment and preparation method thereof Download PDF

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Publication number
CN115491015A
CN115491015A CN202211202169.6A CN202211202169A CN115491015A CN 115491015 A CN115491015 A CN 115491015A CN 202211202169 A CN202211202169 A CN 202211202169A CN 115491015 A CN115491015 A CN 115491015A
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ppc
processing equipment
biodegradable
material processing
biodegradable material
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CN115491015B (en
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高凤翔
蔡毅
王献红
李琳
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Changchun Institute of Applied Chemistry of CAS
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Changchun Institute of Applied Chemistry of CAS
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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
    • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/002—Methods
    • B29B7/005—Methods for mixing in batches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Abstract

The invention provides a special cleaning material for biodegradable material processing equipment and a preparation method thereof, wherein the cleaning material comprises the following components in parts by weight: 100 parts of PPC; 0.15 to 0.2 portion of hydrolytic resistance agent; 0.4 to 0.8 portion of ethylene bis stearamide. In the invention, the PPC mainly plays a role in adhering other biodegradable materials and carbon deposition so as to achieve the effect of cleaning equipment; the hydrolysis resistant agent mainly plays a role in tackifying and also has a certain thermal stability; the ethylene bis stearamide mainly plays a role in compatibility and lubrication, can improve the compatibility of PPC and other biodegradable materials in equipment, and can properly adjust the viscosity of a melt to achieve the optimal cleaning effect. The machine cleaning material provided by the invention mainly aims at processing equipment such as a biodegradable double screw, a film blowing machine and the like, can quickly clean residual accumulated materials in the processing equipment, and effectively solves the problems of crystal points and black points when the biodegradable material is blown.

Description

Machine cleaning material for biodegradable material processing equipment and preparation method thereof
Technical Field
The invention belongs to the technical field of machine cleaning materials, and particularly relates to a machine cleaning material of biodegradable material processing equipment and a preparation method thereof.
Background
In recent years, biodegradable materials in China are developed vigorously, and with the scheme of plastic pollution treatment in China autonomous states of provinces and cities, a plurality of biodegradable material production lines are started and built, wherein the planned productivity of poly (butylene adipate/terephthalate) (PBAT) is over 1500 million tons, and the planned productivity of polylactic acid (PLA) is over 500 million tons. In addition, the biodegradable material has rapidly increased productivity and further enriched varieties, and the industrialization of materials such as carbon dioxide copolymer (PPC), polycaprolactone (PCL), polyhydroxyalkanoate (PHA) and the like is also realized.
However, most of the processing equipment adopted at present is designed according to the traditional non-biodegradable materials, and matched processing aids and cleaning materials are not available. Particularly, in the film products which are widely applied at the present stage, due to the lack of the cleaning materials, the switching between the cleaning materials and the processing processes between the non-biodegradable materials and the biodegradable materials is often encountered, on one hand, a large amount of materials are wasted, because the biodegradable materials and the non-biodegradable materials are basically incompatible, the non-biodegradable materials can be cleaned up, the non-biodegradable materials need to be cleaned out when the biodegradable materials are processed, and a large amount of raw materials need to be consumed when the cleaning machines are used. On the other hand, the biodegradable material and the non-biodegradable material are completely incompatible, so that the biodegradable material often has small crystal points and small black points when preparing products, and particularly, the problems of unstable film blowing bubble, air leakage and the like when blowing a film can be caused, the product quality is influenced, and the production efficiency is reduced. Therefore, a special cleaning material for biodegradable materials is needed to solve the above practical problems encountered in production.
Disclosure of Invention
In view of this, the invention aims to provide a cleaning material for biodegradable material processing equipment and a preparation method thereof.
The invention provides a special cleaning material for biodegradable material processing equipment, which is prepared from materials comprising PPC, an anti-hydrolysis agent and ethylene bis stearamide, and comprises the following components in parts by weight,
100 parts of PPC;
0.15 to 0.2 portion of hydrolytic resistance agent;
0.4 to 0.8 portion of ethylene bis stearamide.
Preferably, the PPC is a copolymer of carbon dioxide and propylene oxide;
the PPC has a catalyst residue of 1-100 ppm and a polycarbonate molar content of 90-99.9%.
Preferably, the weight average molecular weight of the PPC is 800-1200 kg/mol, and the molecular weight distribution is 2-3.
Preferably, the anti-hydrolysis agent is selected from carbodiimide and/or polymeric carbodiimide.
Preferably, the total amine value of the ethylene bis stearamide is less than 3.0mg KOH/g, the acid value is less than 7.0mg KOH/g, and the volatile matter is less than 0.5%.
The invention provides a preparation method of a special cleaning material for biodegradable material processing equipment, which comprises the following steps:
carrying out melt blending on PPC, an anti-hydrolysis agent and ethylene bis stearamide to obtain a blend;
and extruding and granulating the mixture to obtain the special cleaner material for the biodegradable material processing equipment.
Preferably, the melt blending temperature is 130 to 150 ℃.
Preferably, the melt blending is carried out under stirring conditions, and the stirring speed is 10 to 30 revolutions per minute.
Preferably, the time for melt blending is 7 to 13 minutes.
Preferably, the temperature zone setting of the extrusion granulation comprises:
the first area is 80-100 ℃;
the second area is 110-130 ℃;
a third area is 120-140 ℃;
the fourth area is 130-150 ℃;
the fifth area is 130-150 ℃;
the sixth area is 130-150 ℃;
the seventh area is 130-150 ℃;
the temperature of the machine head is 130-140 ℃.
The invention provides a special cleaning material for biodegradable material processing equipment, which is prepared by mixing PPC, an anti-hydrolysis agent and ethylene bis stearamide, and comprises the following raw materials: 100 parts by weight of PPC; 0.15 to 0.2 weight portion of hydrolytic resistance agent; 0.4 to 0.8 portion of ethylene bis stearamide. The special cleaning material for the biodegradable material processing equipment provided by the invention firstly utilizes the characteristics of high viscosity, iron non-sticking and good compatibility with other biodegradable materials of high molecular weight PPC, and plays a role in adhering other biodegradable materials and carbon deposition so as to achieve the effect of cleaning the equipment; the hydrolysis resistant agent plays a role of a heat stabilizer, so that the molecular weight of the PPC is kept in the melting process, and the high melt viscosity of the PPC is also guaranteed by the molecular weight maintenance. On the other hand, the anti-hydrolysis agent mainly plays a role in tackifying, can react with an active group at the tail end of the PPC, further increases the melt viscosity of the PPC and achieves a better cleaning effect; the ethylene bis stearamide mainly plays a role in compatibility and lubrication, can improve the compatibility of PPC and other biodegradable materials in equipment, and can properly adjust the viscosity of a melt to achieve the optimal cleaning effect.
The invention provides a preparation method of a special cleaner material for biodegradable material processing equipment, and most of biodegradable materials are sensitive to shearing, so that molecular chain breakage is easily caused by high shearing, and melt viscosity is reduced. In addition, the preparation method provided by the invention has the advantages of simple process and easy control of operation, and all the used equipment is universal equipment, thereby being beneficial to industrial application.
Experimental results show that the special machine cleaning material for the biodegradable material processing equipment has a good equipment cleaning effect, and is suitable for processing and film blowing equipment for biodegradable materials such as PPC, PBAT, PLA and the like.
Drawings
FIG. 1 shows the rotor condition after banburying of the cleaner material prepared in example 1 of the present invention;
in FIG. 2, A is the condition of the rotor after PBAT banburying processing, and B is the condition of the rotor after cleaning of the cleaning material prepared in example 1;
in fig. 3, a shows the condition of the rotor after the PLA banburying process, and B shows the condition of the rotor after the cleaning material prepared in example 1 is cleaned.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a special cleaning material for biodegradable material processing equipment, which is prepared from materials comprising PPC, an anti-hydrolysis agent and ethylene bis stearamide, and comprises the following components in parts by weight,
100 parts of PPC (polymethyl ethylene carbonate);
0.15 to 0.2 portion of hydrolytic resistance agent;
0.4 to 0.8 portion of ethylene bis stearamide.
In the present invention, the PPC is a copolymer of carbon dioxide and propylene oxide; the catalyst residue of the PPC is preferably 1-100 ppm; the polycarbonate molar content of the PPC is preferably 90-99.9%, more preferably 92-98%, and most preferably 94-96%; the weight average molecular weight of the PPC is preferably 800-1200 kg/mol, more preferably 1000-1100 kg/mol, and most preferably 1050kg/mol; the molecular weight distribution of the PPC is preferably 2 to 3, more preferably 2.5.
In the invention, the PPC is a main material, is synthesized by copolymerizing carbon dioxide and propylene oxide, and is an amorphous biodegradable plastic. The source of the PPC is not particularly limited in the present invention, and the PPC can be obtained from commercial sources or prepared according to a method for preparing PPC well known to those skilled in the art.
In the present invention, the hydrolysis resistance agent is preferably 0.16 to 0.19 parts by weight, more preferably 0.17 to 0.18 parts by weight.
In the present invention, the anti-hydrolysis agent is preferably selected from carbodiimides and/or polymeric carbodiimides; more preferably supplied by Shanghai Langyi functional materials Ltd
Figure BDA0003872827460000041
Model 210 product.
In the present invention, the weight part of the ethylene bis stearamide is preferably 0.5 to 0.7 part, and more preferably 0.6 part.
In the invention, the total amine value of the ethylene bis stearamide is preferably less than 3.0mg KOH/g, the acid value is preferably less than 7.0mg KOH/g, and the volatile component is preferably less than 0.5%.
In the invention, the preparation raw materials of the special cleaning material for the biodegradable material processing equipment preferably further comprise: and (4) an auxiliary agent.
The technical personnel in the field can select and add different types of additives according to the actual situation, so that the special cleaning material for the biodegradable material processing equipment provided by the invention has the required performance; for example, in the invention, the addition of the fluorine-containing polymer (the polymer of 1,2, 3-hexafluoro-1-propylene and 1, 1-difluoroethylene) can have stronger affinity with the metal mouth film wall and low surface energy, and form a dynamic coating to reduce the flow damping of the melt and improve the cleaning effect; the lubricant is added, so that the flowing property of the special cleaning material for the biodegradable material processing equipment can be improved, and the torque value is reduced; the color of the special cleaning material for the biodegradable material processing equipment provided by the invention can be changed by adding the pigment.
The invention provides a preparation method of a special cleaning material for biodegradable material processing equipment, which comprises the following steps:
carrying out melt blending on PPC, an anti-hydrolysis agent and ethylene bis stearamide to obtain a blend;
and extruding and granulating the mixture to obtain the special cleaner material for the biodegradable material processing equipment.
In the present invention, the melt blending is preferably carried out in an internal mixer; the melt blending temperature is preferably 130 to 150 ℃, more preferably 135 to 145 ℃, and most preferably 140 ℃; the rotation speed is preferably 10 to 30 revolutions per minute, more preferably 15 to 25 revolutions per minute, and most preferably 20 revolutions per minute; the time is preferably 7 to 13 minutes, more preferably 8 to 12 minutes, more preferably 9 to 11 minutes, and most preferably 10 minutes.
In the invention, the blend is preferably fed into a single screw through a double-cone screw, extruded through a conveyer belt, air-cooled and granulated to obtain the special cleaner material for the biodegradable material processing equipment.
In the present invention, the temperature zone setting for extrusion granulation preferably includes:
the first area is 80-100 ℃;
the second area is 110-130 ℃;
the three area is 120-140 ℃;
the fourth area is 130-150 ℃;
the fifth area is 130-150 ℃;
the sixth area is 130-150 ℃;
the seventh area is 130-150 ℃;
the temperature of the machine head is 130-140 ℃.
In the present invention, the temperature of the first zone is preferably 85 to 95 ℃, more preferably 90 ℃; the temperature of the second zone is preferably 115-125 ℃, and the most preferably 120 ℃; the temperature of the three zones is preferably 125-135 ℃, and more preferably 130 ℃; the temperature of the four zones is preferably 135-145 ℃, and most preferably 140 ℃; the temperature of the fifth area is preferably 135-145 ℃, and most preferably 140 ℃; the temperature of the sixth zone is preferably 135-145 ℃, and the most preferably 140 ℃; the temperature of the seventh zone is preferably 135-145 ℃, and the most preferably 140 ℃; the head temperature is preferably 135 ℃.
In the present invention, the method for using the special cleaning material for the biodegradable material processing equipment preferably comprises:
and continuously extruding the special cleaning material for the biodegradable material processing equipment in the processing equipment for more than 30 min.
The invention provides a special cleaning material for biodegradable material processing equipment, which is prepared by mixing PPC, an anti-hydrolysis agent and ethylene bis stearamide, and comprises the following raw materials: 100 parts by weight of PPC; 0.15 to 0.2 weight portion of anti-hydrolysis agent; 0.4 to 0.8 portion of ethylene bis stearamide. The special cleaning material for the biodegradable material processing equipment provided by the invention firstly utilizes the characteristics of high viscosity, iron non-sticking property and good compatibility with other biodegradable materials of the high molecular weight PPC to achieve the effect of adhering other biodegradable materials and carbon deposition so as to clean the equipment; the hydrolysis resistant agent plays a role of a heat stabilizer, so that the molecular weight of the PPC is kept in the melting process, and the high melt viscosity of the PPC is also guaranteed by keeping the molecular weight. On the other hand, the anti-hydrolysis agent mainly plays a role in tackifying, can react with an active group at the tail end of the PPC, further increases the melt viscosity of the PPC and achieves a better cleaning effect; the ethylene bis stearamide mainly plays a role in compatibility and lubrication, can improve the compatibility of PPC and other biodegradable materials in equipment, and can properly adjust the viscosity of a melt to achieve the optimal cleaning effect.
The PPC used in the following examples of the present invention was purchased from New materials Oriental, jilin Boda, inc.; the anti-hydrolysis agent is purchased from Shanghai Langyi functional materials Co., ltd; the ethylene bis stearamide used was purchased from Jiangxi Bell Gaokou New materials Co.
Example 1
25kg of PPC with the weight-average molecular weight of 1020kg/mol, the molecular weight distribution of 2.6, the content of polycarbonate in a molecular chain of 92.5 percent, the residual content of catalyst of 53ppm and 50g of hydrolysis resistant agent
Figure BDA0003872827460000061
210 and 150g of ethylene bisstearamide were melt blended in an internal mixer set at a temperature of: the rotational speed was set at 20 rpm at 140 ℃ and the processing time was set at 10 minutes.
Feeding the prepared material into a single screw through a double-cone screw, wherein the temperature of the single screw is set as follows: 90 ℃ in the first area, 120 ℃ in the second area, 130 ℃ in the third area, 140 ℃ in the fourth area, 140 ℃ in the fifth area, 140 ℃ in the sixth area, 140 ℃ in the seventh area and 135 ℃ in the machine head; extruding, passing through a conveyer belt, air cooling and granulating to obtain the special cleaner material for the biodegradable material processing equipment.
Example 2
25kg of PPC with the weight-average molecular weight of 1020kg/mol, the molecular weight distribution of 2.6, the content of polycarbonate in a molecular chain of 92.5 percent, the residual content of catalyst of 53ppm and 37.5g of hydrolysis resistant agent
Figure BDA0003872827460000062
210 and 200g of ethylene bisstearamide are melt-blended in an internal mixer set at the following temperatures: the rotation speed was set at 20 rpm at 140 ℃ and the processing time was set at 10 minutes.
Feeding the prepared material into a single screw through a double-cone screw, wherein the temperature of the single screw is set as follows: the temperature of the first area is 90 ℃, the temperature of the second area is 120 ℃, the temperature of the third area is 130 ℃, the temperature of the fourth area is 140 ℃, the temperature of the fifth area is 140 ℃, the temperature of the sixth area is 140 ℃, the temperature of the seventh area is 140 ℃, and the temperature of the machine head is 135 ℃; extruding, passing through a conveyer belt, air cooling and granulating to obtain the special cleaner material for the biodegradable material processing equipment.
Example 3
25kg of PPC with the weight-average molecular weight of 820kg/mol, the molecular weight distribution of 2.6, the polycarbonate content in a molecular chain of 95.1 percent, 53ppm of catalyst residue and 50g of hydrolysis resistant agent
Figure BDA0003872827460000063
210 and 200g of ethylene bisstearamide are melt blended in an internal mixer set to: the rotational speed was set at 20 rpm at 140 ℃ and the processing time was set at 10 minutes.
Feeding the prepared material into a single screw through a double-cone screw, wherein the temperature of the single screw is set as follows: the temperature of the first area is 90 ℃, the temperature of the second area is 120 ℃, the temperature of the third area is 130 ℃, the temperature of the fourth area is 140 ℃, the temperature of the fifth area is 140 ℃, the temperature of the sixth area is 140 ℃, the temperature of the seventh area is 140 ℃, and the temperature of the machine head is 135 ℃; extruding, passing through a conveyer belt, air cooling and granulating to obtain the special cleaner material for the biodegradable material processing equipment.
Performance detection
In order to test the cleaning effect of the cleaning material, PBAT and PLA are subjected to banburying melting processing respectively, and the condition of the bonding material on the rotor of the banbury mixer is checked to judge the cleaning effect.
The clear mill batch prepared in example 1 was melt processed in an internal mixer at 170 ℃ for 5min at 50rpm, the rotor of the internal mixer being as shown in FIG. 1 after the processing.
PBAT (a copolymer of butanediol adipate and butanediol terephthalate) is subjected to melt processing in an internal mixer at 170 ℃, internal mixing time of 5min and rotation speed of 50rpm; the starting materials prepared in example 1 were then used for starting-up, the process and conditions for starting-up were identical to those for PBAT, and the conditions for the rotors of the internal mixer at the various stages are shown in FIG. 2.
Melting PLA (polylactic acid) in an internal mixer at 180 ℃ for 5min at 50rpm, taking out after processing, and then cleaning the internal mixer with the cleaner material prepared in the embodiment 1 at 180 ℃ for 5min at 50rpm; the rotor of the mixer at each stage is shown in figure 3.
As can be seen from the figures 1 to 3, the prepared cleaning material has good cleaning effect and obvious cleaning effect on common biodegradable materials.
Extruding and blowing the melt-processed PBAT by using an extruder to obtain a PBAT film with the thickness of 20-25 microns, wherein the first zone temperature, the second zone temperature, the third zone temperature and the machine head temperature are 120 ℃, 155 ℃ and 160 ℃ respectively in the extrusion and blowing process; the extruder is cleaned by adopting the special cleaning machine material for the biodegradable material processing equipment prepared in the embodiment, the cleaning machine material is adopted for continuously extruding the material for more than 30min, the temperature in the first area is 120 ℃, the temperature in the second area is 155 ℃, the temperature in the third area is 165 ℃ and the temperature in the head is 160 ℃ in the extruding process, and the PBAT extrusion and film blowing are carried out according to the method again after the extruding is finished, so that the PBAT film with the thickness of 20-25 microns is obtained. Detecting the number of crystal points of the PBAT film prepared before and after the cleaning of the extruder, randomly selecting three sections of one-meter films, visually inspecting the films to show the number of the crystal points, and averaging; the detection results are as follows:
Figure BDA0003872827460000081
the invention provides a special cleaning material for biodegradable material processing equipment, which is prepared by mixing PPC, an anti-hydrolysis agent and ethylene bis stearamide, and comprises the following raw materials: 100 parts by weight of PPC; 0.15 to 0.2 weight portion of hydrolytic resistance agent; 0.4 to 0.8 portion of ethylene bis stearamide. The special cleaning material for the biodegradable material processing equipment provided by the invention firstly utilizes the characteristics of high viscosity, iron non-sticking and good compatibility with other biodegradable materials of high molecular weight PPC, and plays a role in adhering other biodegradable materials and carbon deposition so as to achieve the effect of cleaning the equipment; the hydrolysis resistant agent plays a role of a heat stabilizer, so that the molecular weight of the PPC is kept in the melting process, and the high melt viscosity of the PPC is also guaranteed by the molecular weight maintenance. On the other hand, the anti-hydrolysis agent mainly plays a role in tackifying, can react with an active group at the tail end of the PPC, further increases the melt viscosity of the PPC and achieves a better cleaning effect; the ethylene bis stearamide mainly plays a role in compatibility and lubrication, can improve the compatibility of PPC and other biodegradable materials in equipment, and can properly adjust the viscosity of a melt to achieve the optimal cleaning effect.
While the invention has been described and illustrated with reference to specific embodiments thereof, such description and illustration are not intended to limit the invention. It will be clearly understood by those skilled in the art that various changes may be made to adapt a particular situation, material, composition of matter, substance, method or process to the objective, spirit and scope of this application without departing from the true spirit and scope of the invention as defined by the appended claims. All such modifications are intended to be within the scope of the claims appended hereto. Although the methods disclosed herein have been described with reference to particular operations being performed in a particular order, it should be understood that these operations may be combined, sub-divided, or reordered to form equivalent methods without departing from the teachings of the present disclosure. Accordingly, unless specifically indicated herein, the order and grouping of the operations is not a limitation of the present application.

Claims (10)

1. A special cleaning material for biodegradable material processing equipment is prepared from materials including PPC, an anti-hydrolysis agent and ethylene bis stearamide, and comprises the following components in parts by weight,
100 parts of PPC;
0.15 to 0.2 portion of hydrolytic resistance agent;
0.4 to 0.8 portion of ethylene bis stearamide.
2. The special cleaning material for the biodegradable material processing equipment according to claim 1, wherein the PPC is a copolymer of carbon dioxide and propylene oxide;
the PPC has a catalyst residue of 1-100 ppm and a polycarbonate molar content of 90-99.9%.
3. The special cleaning material for biodegradable material processing equipment according to claim 1, wherein the weight average molecular weight of the PPC is 800-1200 kg/mol, and the molecular weight distribution is 2-3.
4. The special cleaning material for the biodegradable material processing equipment as set forth in claim 1, wherein the hydrolysis-resistant agent is selected from carbodiimide and/or polymeric carbodiimide.
5. The special cleaning material for biodegradable material processing equipment according to claim 1, wherein the total amine value of ethylene bis stearamide is less than 3.0mg KOH/g, the acid value is less than 7.0mg KOH/g, and the volatile matter is less than 0.5%.
6. A method for preparing the special cleaning material for the biodegradable material processing equipment, which comprises the following steps:
carrying out melt blending on PPC, an anti-hydrolysis agent and ethylene bis stearamide to obtain a blend;
and extruding and granulating the mixture to obtain the special cleaner material for the biodegradable material processing equipment.
7. The method of claim 6, wherein the melt blending temperature is 130 to 150 ℃.
8. The method of claim 6, wherein the melt blending is performed under stirring at a speed of 10 to 30 revolutions per minute.
9. The method of claim 6, wherein the melt blending time is 7 to 13 minutes.
10. The method of claim 6, wherein the temperature zone setting of the extrusion granulation comprises:
Figure FDA0003872827450000011
Figure FDA0003872827450000021
CN202211202169.6A 2022-09-29 2022-09-29 Biodegradable material processing equipment cleaning material and preparation method thereof Active CN115491015B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008024851A (en) * 2006-07-21 2008-02-07 Mitsui Chemicals Inc Biodegradable composition, and molded article and use of the same
CN105001481A (en) * 2015-03-31 2015-10-28 天津金发新材料有限公司 Special general polymer material for machine cleaning and preparation method thereof
CN108329575A (en) * 2017-01-19 2018-07-27 合肥杰事杰新材料股份有限公司 A kind of mixer cleaning material and preparation method thereof
CN109280351A (en) * 2018-08-10 2019-01-29 万华化学集团股份有限公司 A kind of extruder or screw in injection molding machine cleaning material and its preparation and application

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008024851A (en) * 2006-07-21 2008-02-07 Mitsui Chemicals Inc Biodegradable composition, and molded article and use of the same
CN105001481A (en) * 2015-03-31 2015-10-28 天津金发新材料有限公司 Special general polymer material for machine cleaning and preparation method thereof
CN108329575A (en) * 2017-01-19 2018-07-27 合肥杰事杰新材料股份有限公司 A kind of mixer cleaning material and preparation method thereof
CN109280351A (en) * 2018-08-10 2019-01-29 万华化学集团股份有限公司 A kind of extruder or screw in injection molding machine cleaning material and its preparation and application

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