CN106700134B - Degradable casting films of starch-based bio and preparation method thereof - Google Patents

Degradable casting films of starch-based bio and preparation method thereof Download PDF

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CN106700134B
CN106700134B CN201611052653.XA CN201611052653A CN106700134B CN 106700134 B CN106700134 B CN 106700134B CN 201611052653 A CN201611052653 A CN 201611052653A CN 106700134 B CN106700134 B CN 106700134B
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starch
degradable
based bio
casting films
speed
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CN106700134A (en
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郑航
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Guangdong chengyuechengyuan Biotechnology Co.,Ltd.
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Guangdong Jiayuan Biological Polytron Technologies Inc
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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
    • 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
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
    • B29B13/065—Conditioning or physical treatment of the material to be shaped by drying of powder or pellets
    • 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
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2303/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
    • C08J2303/02—Starch; Degradation products thereof, e.g. dextrin
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/08—Copolymers of ethene
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/16—Applications used for films
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/062—HDPE
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/066—LDPE (radical process)

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Biological Depolymerization Polymers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention discloses degradable casting films of a kind of starch-based bio and preparation method thereof, it includes mass percent component: starch 40-50%, polyethylene 15-25%, polyvinyl alcohol 10-13%, polydactyl acid 5-10%, plasticizer 6-12%, cellulose 1-2%, crosslinking agent 1-2%, auxiliary agent 2.1-4.5%.The degradable casting films film of the present invention, water-fast, oil resistant, resistance to leakage, tensile strength is big, and flexibility is high, can apply in -25 DEG C~70 DEG C temperature ranges.Product of the present invention is free of any toxic additive, and ingredient science, process drum list, low energy consumption, is applicable in automated machine production, especially nontoxic, harmless, degradable is the rare substitute products of petroleum-based plastics.The present invention is main substrate using cheap starch, and the film has good degradability, meets national standard, and have good physics service performance.

Description

Degradable casting films of starch-based bio and preparation method thereof
[technical field]
The present invention relates to a kind of degradable casting films and preparation method thereof more particularly to a kind of degradable streams of starch-based bio Prolong film and preparation method thereof, belongs to waterproof material technical field.
[background technique]
Casting films are normally used in various disposable commodities, such as: sanitary napkin, diaper, bandage, however, city Most of on field are the outer cover films of petroleum-based plastics or product packaging film is nondegradable, even if such film is raw Biodegradable, but the biomaterial and auxiliary agent of their a large amount of valuableness, these high costs limit them one Being widely used in secondary property commodity.
[summary of the invention]
Object of the present invention is to overcome the deficiencies of the prior art and provide a kind of main substrate to be easy to get, starch base at low cost is raw Biodegradable casting films.
It is a further object of the present invention to provide a kind of preparation methods of above-mentioned degradable casting films.
The present invention is achieved by the following technical solutions:
The degradable casting films of starch-based bio, it is characterised in that including following mass percent component:
Further, the degradable casting films of starch-based bio of the present invention, it is characterised in that including following mass percent group Point:
Said components are major ingredient starch-based bio pellet raw material used in preparation casting films.
Polyethylene in the present invention is carried out by LLDPE, LDPE and HDPE by common PE curtain coating membrane fluidity and viscosity criterion Proportion, preferred mass ratio 2:1:1 mixing composition.
Polydactyl acid in the present invention is embedding total using ethylene, acrylic acid N-butyl, metering system glycidic acid three PLA and PBAT is carried out gained after grafting granulation as toughener by polymers.Modified polylactic acid impact and compatibility improve Significantly.
Plasticizer in the present invention is selected from one or more of glycerine, citric acid, sorbierite, polypropylene glycol, plasticising Agent can also be the composite elasticizer of polyalcohol or its ester type compound composition.
Cellulose preferably carboxymethyl cellulose sodium in the present invention.
Crosslinking agent in the present invention uses at least one of unsaturated carboxylic acid or anhydride compound, such as: octadecenic acid, The graft copolymer of hendecene base succinic anhydride, dodecenylsuccinic acid acid anhydride etc. or biodegradable aliphatic polyester, such as: Pla-pcl (PCL), polyglycolic acid (PGA), polyhydroxybutyrate rouge (PHB) etc., preferably octadecenic acid.
Auxiliary agent in the present invention includes lubricant, hydrophobicity agent and flexibility agent, wherein lubricant 1-2%, preferably 1.6%, Hydrophobicity agent (PHB) 0.8-1.6%, preferably 1.2%, flexibility agent 0.3-0.9%, preferably 0.6%.
The preferred stearic acid acyl of lubricant in the present invention can also use methylene bis-stearamides, ethylene bis stearamide Deng.
Preferably poly--β-hydroxybutyric acid the rouge (PHB) of hydrophobicity agent in the present invention, can also use polyethylene glycol oxide (PEO)。
The preferred polyethylene glycol of flexibility agent (PEG) in the present invention can also use polyethylene glycol oxide (PEO).
A kind of preparation method of the degradable casting films of above-mentioned starch-based bio, it is characterised in that the following steps are included:
A, starch, polyvinyl alcohol and plasticizer are inputted in high-speed mixer and is uniformly mixed；
B, it is uniformly mixed again by polyethylene and polydactyl acid input high-speed mixer；
C, finally cellulose, crosslinking agent and all auxiliary agents are sequentially input in high-speed mixer and is uniformly mixed, will mixed Good material is after supercooling by extrusion molding in double screw extruder, underwater cutpellet；
D, molding particle is dehydrated, screened up to starch-based bio pellet；
E, it after the starch-based bio pellet after screening being expected that distinguishing extrusion calendaring by cast film machine is cooled and shaped with PE, cuts Side winding.
Wherein 65 DEG C~70 DEG C of the mixing temperature in step a incorporation time 4~6 minutes, mix 220 revs/min of revolving speed； 85 DEG C~90 DEG C of mixing temperature in step b incorporation time 8~10 minutes, mixes 350 revs/min of revolving speed；It is mixed in step c 145 DEG C~150 DEG C of temperature are closed, incorporation time 5~8 minutes, mixes 150 revs/min of revolving speed.
Wherein in step c double screw extruder screw slenderness ratio are as follows: L/D=52:1；2 × 3500Nm of output torque；It is defeated Enter revolving speed: 1500rpm；Export revolving speed: 400rpm；Transmission speed ratio: i=3:1, the processing conditions of the double screw extruder are as follows: It is set as 165 DEG C~185 DEG C below one area, 165 DEG C: four of area, 150 DEG C: two of area, 160 DEG C: three of area；Pressure is set as 10MPa；Speed Degree is 45 revs/min, and melting, plasticizing, squeezes out vacuum evacuation.
Wherein in step e, cast film machine is three-layer co-extruded machine A/B/A, and squeezing out ratio (weight ratio) is 1:3:1, screw rod Draw ratio L/D is 42:1, and the host hopper of cast film machine is added in starch-based bio pellet, and slave hopper is added in PE, and slave is each Area's processing temperature is 150 DEG C~240 DEG C, specifically: head section processing temperature is 180~240 DEG C, and pressure is set as 30Mpa. 120 DEG C~160 DEG C of each area's processing temperature of host B；150 DEG C~160 DEG C of head section processing temperature, head pressure is set as 10Mpa。
In preparation method of the present invention, underwater cutpellet uses west gate sub-motor, pneumatic feed, and maximum speed is 2840 revs/min Clock, can be with the cooperation of the amount of extruder.
The degradable casting films of starch-based bio of the present invention successively pass through in casting machine according to actual needs and the market demand Melting, plasticizing, metering distribution, cooling, traction, winding are crossed, the film of 0.002~0.08mm of thickness can be made.
The present invention in terms of existing technologies, has the advantage that
In the present invention, the degradable casting films film article of starch-based bio pellet and its preparation, water-fast, oil resistant, resistance to infiltration Leakage, tensile strength is big, and flexibility is high, can apply in -25 DEG C~70 DEG C temperature ranges.Product of the present invention toxic adds without any Add agent, ingredient science, process drum list, low energy consumption, is applicable in automated machine production, especially nontoxic, harmless, degradable is petroleum The rare substitute products of base plastics.
The present invention is main substrate using cheap starch, and the film has good degradability, meets national mark Standard, and there is good physics service performance.
[specific embodiment]
The degradable casting films of starch-based bio of the present invention, main pellet are made up of following mass percent component:
Prepare biology base pellet method the following steps are included:
A, it is uniformly mixed in ative starch, polyvinyl alcohol and plasticizer input high-speed mixer；
B, it is uniformly mixed again by polyethylene and polydactyl acid input high-speed mixer；
C, finally all auxiliary agents are sequentially input in high-speed mixer and is uniformly mixed, by the material mixed after supercooling By extrusion molding in double screw extruder, underwater cutpellet；
D, molding particle is dehydrated, screened up to starch-based bio pellet；
Wherein 65 DEG C~70 DEG C of the mixing temperature in step a incorporation time 4~6 minutes, mix 220 revs/min of revolving speed； 85 DEG C~90 DEG C of mixing temperature in step b incorporation time 8~10 minutes, mixes 350 revs/min of revolving speed；It is mixed in step c 145 DEG C~150 DEG C of temperature are closed, incorporation time 5~8 minutes, mixes 150 revs/min of revolving speed.
It by biology base pellet and PE by screw slenderness ratio L/D is 42:1 when preparing casting films, output torque 2 × 3500Nm；Input speed: 1500rpm；Export revolving speed: 400rpm；Transmission speed ratio: the three-layer co-extruded cast film machine A/B/ of i=3:1 Respectively after extrusion calendaring cooling and shaping, trimming is wound A (weight ratio 1:3:1), specifically includes the following steps:
Starch-based bio pellet is added in the host hopper B of cast film machine, and PE is added in slave hopper A, head section Processing temperature is 180~240 DEG C, and pressure is set as 30Mpa.120 DEG C~160 DEG C of each area's processing temperature of host B；Head section adds 150 DEG C~160 DEG C of work temperature, head pressure is set as 10Mpa, receives by distributor extrusion, three-roller calendaring cooling forming, trimming Volume, packaging.
Invention is further described in detail combined with specific embodiments below:
Embodiment 1:
Biology base pellet is prepared by following mass percent component:
Preparation curtain coating film method is as follows:
A, starch, polyvinyl alcohol and plasticizer are inputted in high-speed mixer with 65 DEG C of mixing temperature, mixes revolving speed 220 Rev/min mixing 4 minutes be uniformly mixed；
B, again will polyethylene and polydactyl acid input high-speed mixer in 90 DEG C of mixing temperature, mixing 350 turns of revolving speed/ Minute mixing is uniformly mixed for 8 minutes；
C, finally cellulose, crosslinking agent and all auxiliary agents are sequentially input with 150 DEG C of mixing temperature in high-speed mixer, 150 revs/min of revolving speed of mixing mixing 5 minutes is uniformly mixed, by the material mixed by screw slenderness ratio diameter ratio after supercooling are as follows: L/D=52:1；2 × 3500Nm of output torque；Input speed: 1500rpm；Export revolving speed: 400rpm；Transmission speed ratio: i=3:1 Double screw extruder, with processing conditions: being set as 165 DEG C below an area, 165 DEG C: four of area, 150 DEG C: two of area, 160 DEG C: three of area ~185 DEG C；Pressure is set as 10MPa；Speed is 45 revs/min, melting, vacuum evacuation, plasticizing, extrusion molding, underwater cutpellet；
D, molding particle is dehydrated, screened up to starch-based bio pellet；
E, the three-layer co-extruded curtain coating for being 42:1 by screw slenderness ratio L/D with PE material by the starch-based bio pellet after screening Film machine A/B/A (weight ratio 1:3:1) is after 150~240 DEG C of difference extrusion calendarings are cooled and shaped, to cut with each area's processing temperature of slave Side winding.
Embodiment 2:
Biology base pellet is prepared by following mass percent component:
Preparation curtain coating film method is as follows:
A, starch, polyvinyl alcohol and plasticizer are inputted in high-speed mixer and is uniformly mixed；
B, it is uniformly mixed again by polyethylene and polydactyl acid input high-speed mixer；
C, finally cellulose, crosslinking agent and all auxiliary agents are sequentially input in high-speed mixer and is uniformly mixed, will mixed Good material is after supercooling by extrusion molding in double screw extruder, underwater cutpellet；
D, molding particle is dehydrated, screened up to starch-based bio pellet；
E, it after the starch-based bio pellet after screening being expected that distinguishing extrusion calendaring by cast film machine is cooled and shaped with PE, cuts Side winding.
Embodiment 3:
Biology base pellet is prepared by following mass percent component:
Preparation curtain coating film method is the same as embodiment 1, in which: 70 DEG C of the mixing temperature in step a, incorporation time 5 minutes, and mixing 220 revs/min of revolving speed；85 DEG C of mixing temperature in step b incorporation time 10 minutes, mixes 350 revs/min of revolving speed；Step c In 145 DEG C of mixing temperature, incorporation time 8 minutes, mix 150 revs/min of revolving speed.
Embodiment 4:
Biology base pellet is prepared by following mass percent component:
Preparation curtain coating film method is with embodiment 1, and 68 DEG C of mixing temperature in step a incorporation time 5 minutes, mix revolving speed 220 revs/min；88 DEG C of mixing temperature in step b incorporation time 9 minutes, mixes 350 revs/min of revolving speed；It is mixed in step c 148 DEG C of temperature are closed, incorporation time 7 minutes, mixes 150 revs/min of revolving speed.
Embodiment 5:
Biology base pellet is prepared by following mass percent component:
Preparation curtain coating film method is the same as embodiment 1.
Embodiment 6:
Biology base pellet is prepared by following mass percent component:
Starch-based bio curtain coating film method is prepared with embodiment 1.
The degradable casting films of embodiment 1-5 preparation are as shown in table 1 with starch-based bio granule performance:
Table 1:
The degradable cast film performance of embodiment 1-5 preparation is as shown in table 2:
Table 2:
The present invention presses standard GB/T/T29646-2013 and biodegradable starch-resin GB/T27868-2011 standard It executes.

Claims (4)

1. the degradable casting films of starch-based bio, it is characterised in that including following mass percent component:
The polyethylene is made of LLDPE, LDPE and HDPE 2:1:1 in mass ratio mixing；The cellulose is carboxymethyl Sodium cellulosate, the crosslinking agent are at least one of unsaturated carboxylic acid or anhydride compound；
The preparation methods of the degradable casting films of starch-based bio the following steps are included:
A, starch, polyvinyl alcohol and plasticizer are inputted in high-speed mixer and is uniformly mixed；
B, it is uniformly mixed again by polyethylene and polydactyl acid input high-speed mixer；
C, finally cellulose, crosslinking agent and all auxiliary agents are sequentially input in high-speed mixer and is uniformly mixed, by what is mixed Material is after supercooling by extrusion molding in double screw extruder, underwater cutpellet；
D, molding particle is dehydrated, screened up to starch-based bio pellet；
E, after the starch-based bio pellet after screening being expected that distinguishing extrusion calendaring by cast film machine is cooled and shaped with PE, trimming is received Volume；
65 DEG C~70 DEG C of mixing temperature in the step a incorporation time 4~6 minutes, mixes 220 revs/min of revolving speed；Step b In 85 DEG C~90 DEG C of mixing temperature, incorporation time 8~10 minutes, mix 350 revs/min of revolving speed；Mixing temperature in step c 145 DEG C~150 DEG C, incorporation time 5~8 minutes, mix 150 revs/min of revolving speed；The spiral shell of double screw extruder in the step c Bar draw ratio are as follows: L/D=52:1；2 × 3500Nm of output torque；Input speed: 1500rpm；Export revolving speed: 400rpm；It passes Dynamic speed ratio: i=3:1, the processing conditions of the double screw extruder are as follows: an area, 165 DEG C: four of area, 150 DEG C: two of area, 160 DEG C: three of area It is set as 165 DEG C~185 DEG C below；Pressure is set as 10MPa；Speed is 45 revs/min, melt, vacuum evacuation, be plasticized, It squeezes out；In the step e, cast film machine is three-layer co-extruded machine A/B/A, and extrusion weight ratio is 1:3:1, screw slenderness ratio L/ D is 42:1, and the host hopper of cast film machine is added in starch-based bio pellet, and slave hopper, each area's processing temperature of slave is added in PE Degree is 150 DEG C~240 DEG C.
2. the degradable casting films of starch-based bio according to claim 1, it is characterised in that the polydactyl acid is PLA and PBAT are connect as toughener using ethylene, n-butyl acrylate, the embedding copolymer of metering system ethylene oxidic ester three Gained after branch is granulated.
3. the degradable casting films of starch-based bio according to claim 1, it is characterised in that the plasticizer is selected from third One or more of triol, citric acid, sorbierite, polypropylene glycol.
4. the degradable casting films of starch-based bio according to claim 1, it is characterised in that the auxiliary agent includes lubrication Agent, hydrophobicity agent and flexibility agent.
CN201611052653.XA 2016-11-24 2016-11-24 Degradable casting films of starch-based bio and preparation method thereof Active CN106700134B (en)

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CN107082945A (en) * 2017-06-12 2017-08-22 太仓雅奥塑业有限公司 A kind of environmentally-friendly plastic film
CN107471694A (en) * 2017-09-13 2017-12-15 安徽鼎正包装材料有限公司 A kind of film forming preparation technology of PVA film
CN108102191A (en) * 2017-12-22 2018-06-01 浙江惠普科技发展有限公司 A kind of degradable sweet potato starch environment-friendlythin thin film and preparation method thereof
CN108774373A (en) * 2018-06-25 2018-11-09 安徽鼎正包装材料有限公司 A kind of express delivery packaging film of PVA bases controlled degradation and Fertilizer Transformed
CN109867819A (en) * 2019-01-11 2019-06-11 安徽鼎正包装材料有限公司 Polylactic acid-starch-PVA composite degradable packaging film and preparation method thereof
CN110655686A (en) * 2019-11-13 2020-01-07 浙江华发生态科技有限公司 High-starch-content film blowing composite material and preparation method thereof
CN111471293A (en) * 2020-04-27 2020-07-31 温州优创新型材料有限公司 Film and processing method thereof
CN111574796A (en) * 2020-05-28 2020-08-25 佛山市爱地球环保新材料科技有限公司 Novel material capable of being dissolved after damp-heat sterilization for protective clothing and preparation method
CN112480481A (en) * 2020-11-24 2021-03-12 杭州金焱包装彩印有限公司 Pressure-resistant food packaging composite film for plateau environment and preparation method thereof
CN112550930A (en) * 2021-01-04 2021-03-26 安徽沪通环保包装科技有限公司 Convenient square-bottom bag and manufacturing method thereof

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