CN107652521A - A kind of film formula of special material and its film blowing method - Google Patents

A kind of film formula of special material and its film blowing method Download PDF

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Publication number
CN107652521A
CN107652521A CN201610596370.5A CN201610596370A CN107652521A CN 107652521 A CN107652521 A CN 107652521A CN 201610596370 A CN201610596370 A CN 201610596370A CN 107652521 A CN107652521 A CN 107652521A
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CN
China
Prior art keywords
film
temperature
ldpe
lldpe
formula
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610596370.5A
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Chinese (zh)
Inventor
袁小亮
左胜武
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Petroleum and Chemical Corp
Sinopec Yangzi Petrochemical Co Ltd
Original Assignee
China Petroleum and Chemical Corp
Sinopec Yangzi Petrochemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Petroleum and Chemical Corp, Sinopec Yangzi Petrochemical Co Ltd filed Critical China Petroleum and Chemical Corp
Priority to CN201610596370.5A priority Critical patent/CN107652521A/en
Publication of CN107652521A publication Critical patent/CN107652521A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/066—LDPE (radical process)

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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)

Abstract

The invention discloses a kind of film formula of special material and its film blowing method, belong to plastic packing product technical field.The present invention using the PP Pipe Compound preparation for the LDPE and 70% 90%LLDPE blends for including 10% 30% film.It mainly comprises the following steps 1）, prepare before blown film：LDPE and LLDPE are well mixed, and are added to double screw extruder granulation, and film PP Pipe Compound is used as after drying；2）, blown film：Main technologic parameters include：a）The transportation section temperature for controlling inflation film manufacturing machine is 130 160 DEG C, and melt zone temperature is 180 185 DEG C, and the temperature of homogenizing zone is 185 DEG C, and the temperature of die head section is set as 185 DEG C；b）The screw slenderness ratio L/D of inflation film manufacturing machine is 25:1‑40:1, blow-up ratio is 1:2 to 1:3, the height 2.5m 3.0m from film mouth to carry-over pinch rolls；c）Screw speed is 10 20 turns/min in starting, then gradually accelerates screw speed according to film take-up speed.The present invention has excellent shock resistance, and the pliability of film is good, and broken bag is not susceptible to when hitting.

Description

A kind of film formula of special material and its film blowing method
Technical field
The present invention relates to a kind of plastic membrane product technical field, and in particular to a kind of film formula of special material and its blown film Method.
Background technology
With economic and society fast development, people are to the demand using polyethylene as plastic packing product made of raw material Demand that is increasing, while being directed to different field is measured, higher requirement it is also proposed to the performance of film.For this feelings Condition, film PP Pipe Compound is prepared using blending and modifying, be allowed to possess more preferable shock resistance and toughness, can prevent from rushing in external force The phenomenon of lower generation broken bag is hit, while is also equipped with the condition of good blown film.
The content of the invention
It is an object of the invention to provide a kind of simple film PP Pipe Compound of preparation technology and the method for its blown film.The present invention Film PP Pipe Compound there is more preferable shock resistance and toughness.
Technical scheme is as follows：
A kind of film formula of special material, described formula are 10%-30% LDPE (low density polyethylenes by weight percentage Alkene) and 70%-90% LLDPE (linear low density polyethylene (LLDPE)).
Preferable formula is 20% LDPE and 80% LLDPE by weight percentage.
Wherein, LDPE density is 0.918g/cm3, melt flow rate (MFR) 2g/10min；And LLDPE density is 0.918g/cm3, melt flow rate (MFR) 0.96g/10min.
A kind of film blowing method of film PP Pipe Compound, is carried out using following steps：
1), prepare before blown film：
LDPE and LLDPE are proportionally well mixed in high-speed mixer, and are added to double screw extruder granulation, And film PP Pipe Compound is used as after drying.
2), blown film：
Main technologic parameters include：
A) the transportation section temperature for controlling inflation film manufacturing machine is 130-160 DEG C, and melt zone temperature is 180-185 DEG C, the temperature of homogenizing zone Degree is 185 DEG C, and the temperature of die head section is set as 185 DEG C.
B) the screw slenderness ratio L/D of inflation film manufacturing machine is 25: 1-40: 1, and blow-up ratio is 1: 2 to 1: 3, from film mouth to carry-over pinch rolls Highly it is 2.5m-3.0m.
C) screw speed turns/min in starting for 10-20, then gradually accelerates screw speed according to film take-up speed.
Beneficial effect：
The present invention's prepares film PP Pipe Compound by the way of LLDPE and LDPE blendings, is prepared using this raw material thin Film has more preferable shock resistance and toughness, can prevent from occurring under external impacts the phenomenon of broken bag, while is also equipped with good The condition of good blown film.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below Specific embodiment is closed, the present invention is expanded on further.
Embodiment 1 is used for the formula for preparing the PP Pipe Compound of film
The component of the packaging film of table 1 and the parts by weight of each component
Wherein, preferably it is formulated the LLDPE for the LDPE and 80% that proportion is 20%.
The film blowing method of the film PP Pipe Compound of embodiment 2
The film blowing method of film PP Pipe Compound, comprises the following steps：
1), prepare before blown film：
Ratios of the LDPE and LLDPE more than is added in high-speed mixer first and is well mixed, and is added to double Screw extruder is granulated, and film PP Pipe Compound is used as after drying.
2), blown film：
Main technologic parameters include：
A) the transportation section temperature for controlling inflation film manufacturing machine is 130 DEG C, and melt zone temperature is 180 DEG C, and the temperature of homogenizing zone is 185 DEG C, the temperature of die head section is set as 185 DEG C.
B) the screw slenderness ratio L/D of inflation film manufacturing machine is 25, and blow-up ratio is 1: 2.4, and the height from film mouth to carry-over pinch rolls is 2.5m.
C) screw speed is 10 turns/min in starting, then gradually accelerates screw speed according to film take-up speed.
The film blowing method of the film PP Pipe Compound of embodiment 3
1), prepare before blown film：
Ratios of the LDPE and LLDPE more than is added in high-speed mixer first and is well mixed, and is added to double Screw extruder is granulated, and film PP Pipe Compound is used as after drying.
2), blown film：
Main technologic parameters include：
A) the transportation section temperature for controlling inflation film manufacturing machine is 140 DEG C, and melt zone temperature is 182 DEG C, and the temperature of homogenizing zone is 185 DEG C, the temperature of die head section is set as 185 DEG C.
B) the screw slenderness ratio L/D of inflation film manufacturing machine is 40, and blow-up ratio is 1: 2, and the height from film mouth to carry-over pinch rolls is 3m.
C) screw speed is 15 turns/min in starting, then gradually accelerates screw speed according to film take-up speed.
The film blowing method of the film PP Pipe Compound of embodiment 4
1), prepare before blown film：
Ratios of the LDPE and LLDPE more than is added in high-speed mixer first and is well mixed, and is added to double Screw extruder is granulated, and film PP Pipe Compound is used as after drying.
2), blown film：
Main technologic parameters include：
A) the transportation section temperature for controlling inflation film manufacturing machine is 160 DEG C, and melt zone temperature is 185 DEG C, and the temperature of homogenizing zone is 185 DEG C, the temperature of die head section is set as 185 DEG C.
B) the screw slenderness ratio L/D of inflation film manufacturing machine is 40, and blow-up ratio is 1: 3, and the height from film mouth to carry-over pinch rolls is 2.7m.
C) screw speed is 20 turns/min in starting, then gradually accelerates screw speed according to film take-up speed.
The film stretchability of table 2 can be with the experimental data of shock resistance
Above-mentioned as shown by data is preparing film using LLDPE and LDPE blends, can be obviously improved the impact resistance of film Can, reduce and broken bag occurs when being hit.

Claims (4)

  1. A kind of 1. film formula of special material, it is characterised in that：LDPE of the described formula by weight percentage for 10%-30% and 70%-90% LLDPE.
  2. 2. according to the film formula of special material described in claim 1, it is characterised in that：Described formula is by weight percentage 20% LDPE and 80% LLDPE.
  3. 3. according to the film formula of special material described in claim 1 and 2, it is characterised in that：Described LDPE density is 0.918g/cm3, melt flow rate (MFR) 2g/10min；Described LLDPE density is 0.918g/cm3, melt flow rate (MFR) is 0.96g/10min。
  4. A kind of 4. film blowing method of film PP Pipe Compound, it is characterised in that：Key step includes：
    1), prepare before blown film：LDPE and LLDPE are proportionally well mixed in high-speed mixer, and are added to twin-screw Extruder is granulated, and film PP Pipe Compound is used as after drying；
    2), blown film：Main technologic parameters include：
    A) the transportation section temperature for controlling inflation film manufacturing machine is 130-160 DEG C, and melt zone temperature is 180-185 DEG C, and the temperature of homogenizing zone is 185 DEG C, the temperature of die head section is set as 185 DEG C；
    B) the screw slenderness ratio L/D of inflation film manufacturing machine is 25: 1-40: 1, and blow-up ratio is 1: 2 to 1: 3, the height from film mouth to carry-over pinch rolls 2.5m-3.0m；
    C) screw speed turns/min in starting for 10-20, then gradually accelerates screw speed according to film take-up speed.
CN201610596370.5A 2016-07-26 2016-07-26 A kind of film formula of special material and its film blowing method Pending CN107652521A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610596370.5A CN107652521A (en) 2016-07-26 2016-07-26 A kind of film formula of special material and its film blowing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610596370.5A CN107652521A (en) 2016-07-26 2016-07-26 A kind of film formula of special material and its film blowing method

Publications (1)

Publication Number Publication Date
CN107652521A true CN107652521A (en) 2018-02-02

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Application Number Title Priority Date Filing Date
CN201610596370.5A Pending CN107652521A (en) 2016-07-26 2016-07-26 A kind of film formula of special material and its film blowing method

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101318392A (en) * 2008-07-03 2008-12-10 大连华诺塑料科技有限公司 Trilaminar co-extrusion thermal contraction resin film, manufacturing method and application method thereof
CN102452204A (en) * 2010-10-22 2012-05-16 中国石油化工股份有限公司 FFS film for heavy packaging
CN103625052A (en) * 2013-08-02 2014-03-12 苏州艾兴无纺布制品有限公司 Ultrathin film with high barrier properties and preparation process thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101318392A (en) * 2008-07-03 2008-12-10 大连华诺塑料科技有限公司 Trilaminar co-extrusion thermal contraction resin film, manufacturing method and application method thereof
CN102452204A (en) * 2010-10-22 2012-05-16 中国石油化工股份有限公司 FFS film for heavy packaging
CN103625052A (en) * 2013-08-02 2014-03-12 苏州艾兴无纺布制品有限公司 Ultrathin film with high barrier properties and preparation process thereof

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Application publication date: 20180202