CN103756113A - Agricultural mulch film formula and film blowing bag-making method - Google Patents

Agricultural mulch film formula and film blowing bag-making method Download PDF

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Publication number
CN103756113A
CN103756113A CN201310697687.4A CN201310697687A CN103756113A CN 103756113 A CN103756113 A CN 103756113A CN 201310697687 A CN201310697687 A CN 201310697687A CN 103756113 A CN103756113 A CN 103756113A
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CN
China
Prior art keywords
film
bag
lldpe
manufacturing machine
mdpe
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Pending
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CN201310697687.4A
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Chinese (zh)
Inventor
戴骏超
戴胜兰
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Individual
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Individual
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Priority to CN201310697687.4A priority Critical patent/CN103756113A/en
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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
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
    • 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
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
    • 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
    • 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
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—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
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/08—Copolymers of ethene
    • 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
    • C08J2403/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
    • C08J2403/02—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
    • 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
    • C08L2203/162—Applications used for films sealable 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
    • C08L2205/03—Polymer mixtures characterised by other features containing three 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Wrappers (AREA)

Abstract

Relating to the technical field of plastic packaging products, the invention provides an agricultural mulch film formula. The formula involves: 230% of thermoplastic starch TPS, 50% of LLDPE and 20% of MDPE, wherein the LLDPE has density of 0.9185g/cm<3>, tensile strength of 8.3Mpa, breaking elongation of 500%, and a melt flow rate of 2g/10min, and the MDPE has density of 0.9185g/cm<3>, tensile strength of 62.78.3Mpa, breaking elongation of 700%, and a melt flow rate of 1g/10min. According to the invention, the thermoplastic starch plastic with corn starch, tapioca starch and the like as the main raw materials is mixed with LLDPE, LDPE and HDPE, etc., and the product containing the main raw materials has a very good environmental protection benefit, i.e. the raw material thermoplastic starch polymer is recyclable, renewable and sustainable. Compared with traditional petroleum polymers, thermoplastic starch greatly reduces carbon emissions.

Description

Agricultural mulching formula and blown film bag-making method thereof
Technical field:
The present invention relates to plastic packing product technical field, be specifically related to agricultural mulching formula and blown film bag-making method thereof.
Background technology:
A large amount of use such as people's daily life and Industrial products outsourcing and retail trade etc., take the plastic packing product that polyethylene makes as raw material; these plastic packaging bags (film) are cannot degradable material; harmful to environment; be unfavorable for protection of the environment; for this situation, biodegradable plastic is more and more to be used.Biological degradation sill mainly contains thermoplastic starch (TPS), aliphatic polyester (AP) and natural softening agent (glycerine and sorbyl alcohol) blend and supports Biodegradable material, and makes it to have possessed the condition of certain blown film bag.
Summary of the invention:
Technical problem to be solved by this invention is to overcome the defect of prior art, and a kind of agricultural mulching formula and blown film bag-making method thereof that biodegradable material is base-material of take is provided.
Technical problem to be solved by this invention realizes by the following technical solutions.
Agricultural mulching formula, is characterized in that: comprise 29%-31% thermoplastic starch TPS, 49%-51%LLDPE and 19%-21%MDPE, wherein LLDPE density is 0.9185g/cm 3, tensile strength is that 8.3Mpa, fracture extensibility are 500%, melt flow rate (MFR) is 2g/10min, described MDPE density is 0.9185g/cm 3, tensile strength is that 62.78.3Mpa, fracture extensibility are 700%, melt flow rate (MFR) is 1g/10min.
Described further formula proportion is 30% thermoplastic starch TPS, 50%LLDPE and 20%MDPE.
Agricultural mulching blown film bag-making method, is characterized in that: key step comprises:
One, operation is prepared:
Before blown film, must clear up the machine barrel of inflation film manufacturing machine, screw rod, die head, the inflation film manufacturing machine section thermometer of heating checks;
Base-material is tested, detect, base-material water ratio≤1% must carry out drying treatment at water content > 1% to base-material before blown film, and drying temperature must not be higher than 60 ℃, and must be controlled in 1 hour time of drying.
Two, blown film:
In inflation film manufacturing machine, add biological degradation base-material to carry out blown film, main technologic parameters comprises:
A) the fluxing zone temperature of control inflation film manufacturing machine is 125-140 ℃, and homogenizing zone temperature is 140-150, and extruding zone temperature is 140-145, is provided with filtering net after homogenizing zone, and the order number of filtering net is not less than 80 orders, and filtering net has three layers;
B) the screw slenderness ratio L/D of inflation film manufacturing machine is greater than 28:1, and blown film ratio is 1:25 to 1:3, and the height from film mouth to take off roll is greater than 2.5m.
C) screw speed time is 12-35 rev/min in starting, subsequently gradually pick up speed to the rolling speed of catching up with film.
D) control corona treatment, make the surface tension of film at 28 dyne ± 10%.
Three, bag:
Film is carried out to heat seal, sealing, bag with bag machine corresponding to required finished product and obtain finished bag, processing requirement is heat seal, and banding temperature is 140 ℃-180 ℃, and bag rate-controlling is at 40-80/minute.
The invention has the advantages that: W-Gum, tapioca (flour) etc. are the thermoplastic starch plastic of main raw material, mix with LLDPE, LDPE, HDPE etc., the product that contains this main raw material has very high environmental benefit, this environmental benefit shows with his products material thermoplastic starch powder polymer and can circulate, renewable, Sustainable development, compare with traditional petroleum polymer, thermoplastic starch greatly reduces the quantity discharged of carbon.
Embodiment:
For technique means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with specific embodiment, further set forth the present invention.
Agricultural mulching formula, comprises 30% thermoplastic starch TPS, 50%LLDPE and 20%MDPE, and wherein LLDPE density is 0.9185g/cm 3, tensile strength is that 8.3Mpa, fracture extensibility are 500%, melt flow rate (MFR) is 2g/10min, described MDPE density is 0.9185g/cm 3, tensile strength is that 62.78.3Mpa, fracture extensibility are 700%, melt flow rate (MFR) is 1g/10min.
Agricultural mulching blown film bag-making method, key step comprises:
One, operation is prepared:
Before blown film, must clear up the machine barrel of inflation film manufacturing machine, screw rod, die head, the inflation film manufacturing machine section thermometer of heating checks;
Base-material is tested, detect, base-material water ratio≤1% must carry out drying treatment at water content > 1% to base-material before blown film, and drying temperature must not be higher than 60 ℃, and must be controlled in 1 hour time of drying.
Two, blown film:
In inflation film manufacturing machine, add biological degradation base-material to carry out blown film, main technologic parameters comprises:
A) the fluxing zone temperature of control inflation film manufacturing machine is 125-140 ℃, and homogenizing zone temperature is 140-150, and extruding zone temperature is 140-145, is provided with filtering net after homogenizing zone, and the order number of filtering net is not less than 80 orders, and filtering net has three layers;
B) the screw slenderness ratio L/D of inflation film manufacturing machine is greater than 28:1, and blown film ratio is 1:25 to 1:3, and the height from film mouth to take off roll is greater than 2.5m.
C) screw speed time is 12-35 rev/min in starting, subsequently gradually pick up speed to the rolling speed of catching up with film.
D) control corona treatment, make the surface tension of film at 28 dyne ± 10%.
Three, bag:
Film is carried out to heat seal, sealing, bag with bag machine corresponding to required finished product and obtain finished bag, processing requirement is heat seal, and banding temperature is 140 ℃-180 ℃, and bag rate-controlling is at 40-80/minute.
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.

Claims (3)

1. agricultural mulching formula, is characterized in that: comprise 29%-31% thermoplastic starch TPS, 49%-51%LLDPE and 19%-21%MDPE, wherein LLDPE density is 0.9185g/cm 3, tensile strength is that 8.3Mpa, fracture extensibility are 500%, melt flow rate (MFR) is 2g/10min, described MDPE density is 0.9185g/cm 3, tensile strength is that 62.78.3Mpa, fracture extensibility are 700%, melt flow rate (MFR) is 1g/10min.
2. according to the agricultural mulching formula described in claim 1, it is characterized in that: described further formula proportion is 30% thermoplastic starch TPS, 50%LLDPE and 20%MDPE.
3. agricultural mulching blown film bag-making method, is characterized in that: key step comprises:
One, operation is prepared:
Before blown film, must clear up the machine barrel of inflation film manufacturing machine, screw rod, die head, the inflation film manufacturing machine section thermometer of heating checks;
Base-material is tested, detect, base-material water ratio≤1% must carry out drying treatment at water content > 1% to base-material before blown film, and drying temperature must not be higher than 60 ℃, and must be controlled in 1 hour time of drying.
Two, blown film:
In inflation film manufacturing machine, add biological degradation base-material to carry out blown film, main technologic parameters comprises:
A) the fluxing zone temperature of control inflation film manufacturing machine is 125-140 ℃, and homogenizing zone temperature is 140-150, and extruding zone temperature is 140-145, is provided with filtering net after homogenizing zone, and the order number of filtering net is not less than 80 orders, and filtering net has three layers;
B) the screw slenderness ratio L/D of inflation film manufacturing machine is greater than 28:1, and blown film ratio is 1:25 to 1:3, and the height from film mouth to take off roll is greater than 2.5m.
C) screw speed time is 12-35 rev/min in starting, subsequently gradually pick up speed to the rolling speed of catching up with film.
D) control corona treatment, make the surface tension of film at 28 dyne ± 10%.
Three, bag:
Film is carried out to heat seal, sealing, bag with bag machine corresponding to required finished product and obtain finished bag, processing requirement is heat seal, and banding temperature is 140 ℃-180 ℃, and bag rate-controlling is at 40-80/minute.
CN201310697687.4A 2013-12-18 2013-12-18 Agricultural mulch film formula and film blowing bag-making method Pending CN103756113A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310697687.4A CN103756113A (en) 2013-12-18 2013-12-18 Agricultural mulch film formula and film blowing bag-making method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310697687.4A CN103756113A (en) 2013-12-18 2013-12-18 Agricultural mulch film formula and film blowing bag-making method

Publications (1)

Publication Number Publication Date
CN103756113A true CN103756113A (en) 2014-04-30

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101171292A (en) * 2005-04-29 2008-04-30 蒙特利尔巴黎高等理工大学公司 Thermoplastic starch and synthetic polymer blends and method of making
CN101624103A (en) * 2009-07-17 2010-01-13 盖勇 Method for blowing film and making bag by using full biodegradable material as base material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101171292A (en) * 2005-04-29 2008-04-30 蒙特利尔巴黎高等理工大学公司 Thermoplastic starch and synthetic polymer blends and method of making
CN101624103A (en) * 2009-07-17 2010-01-13 盖勇 Method for blowing film and making bag by using full biodegradable material as base material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
江谷: "《复合软包装材料与工艺》", 28 February 2003, article "复合软包装材料与工艺", pages: 169-179,773-775 *

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Application publication date: 20140430