CN112848575A - Novel high-temperature-resistant creep-resistant blown film formula and processing technology thereof - Google Patents
Novel high-temperature-resistant creep-resistant blown film formula and processing technology thereof Download PDFInfo
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
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- 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
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
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- B32B2307/00—Properties of the layers or laminate
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- B32B2307/558—Impact strength, toughness
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/582—Tearability
- B32B2307/5825—Tear resistant
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- 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
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- 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
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- C08J2423/06—Polyethene
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- 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
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/12—Polypropene
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Abstract
The invention discloses a novel high-temperature-resistant creep-resistant blown film formula, which comprises the following components in percentage by mass: 5-10% of polypropylene, 40-50% of high-performance PE polymer, 20-30% of metallocene polyethylene A, 5-10% of low-fat-soluble polyethylene and 10-15% of high-density polyethylene; the invention also discloses a processing technology of the novel high-temperature-resistant creep-resistant blown film, which comprises the steps of outer-layer film blowing, middle-layer film blowing, inner-layer film blowing, total fusion and shaping cooling; according to the invention, by changing the formula of the film, the film has the advantages of appearance texture, strong tensile force, strong toughness and strong impact resistance; the film has better hardness and stiffness, and the tensile strength of the film is stronger; the film has better tear resistance, good toughness and excellent heat seal performance; the film has better transparency and smoothness; the processing technology of the invention is more scientific and reasonable, the processing efficiency is high, the practicability is strong, and the popularization is facilitated.
Description
Technical Field
The invention relates to the technical field of film production, in particular to a novel high-temperature-resistant creep-resistant blown film formula and a processing technology thereof.
Background
The PE film, namely the polyethylene film, is a film produced by using the PE film, and the PE film has moisture resistance and small moisture permeability; the polyethylene film (PE) can be used for manufacturing products with different properties such as low-density, medium-density and high-density polyethylene, crosslinked polyethylene and the like according to different manufacturing methods and control means; however, the conventional PE film generally has the following disadvantages: the sealing temperature is high and difficult to seal; no toughness, poor bag sealing effect, unattractive printed pattern and no barrier property; therefore, a novel high-temperature-resistant creep-resistant blown film formula and a processing technology thereof are provided.
Disclosure of Invention
The invention aims to provide a novel high-temperature-resistant creep-resistant blown film formula and a processing technology thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a novel high-temperature-resistant creep-resistant blown film formula comprises the following components in percentage by mass: 5-10% of polypropylene, 40-50% of high-performance PE polymer, 20-30% of metallocene polyethylene A, 5-10% of low-fat polyethylene and 10-15% of high-density polyethylene.
Preferably, the composition comprises the following components (by mass percent): 5% of polypropylene, 40% of high-performance PE polymer, 30% of metallocene polyethylene A, 10% of low-fat polyethylene and 15% of high-density polyethylene.
Preferably, the composition comprises the following components (by mass percent): 5% of polypropylene, 45% of high-performance PE polymer, 20% of metallocene polyethylene A, 10% of low-fat-soluble polyethylene and 15% of high-density polyethylene.
Preferably, the composition comprises the following components (by mass percent): 10% of polypropylene, 50% of high-performance PE polymer, 25% of metallocene polyethylene A, 5% of low-fat polyethylene and 10% of high-density polyethylene.
Preferably, the high performance PE polymer has a melt index of 26 g/10 min and a density of 0.910 to 0.9708 g/cm 3.
Preferably, the metallocene polyethylene A has a melt index of 13 g/10 min and a density of 0.93 g/cm 3.
Preferably, the low-fat polyethylene has a melt index of 0.5 g/10 min and a density of 0.91 g/cm 3.
Preferably, the polypropylene has a melt index of 9 g/10 min and a density of 0.851-0.935 g/cm 3.
The processing technology of the novel high-temperature-resistant and creep-resistant blown film comprises the following steps:
s1: and (3) outer layer film blowing: fusing 50% of polypropylene and metallocene polyethylene A to form an outer layer, heating the outer layer to the film blowing temperature of 130-150 ℃ to melt raw materials, and extruding;
s2: film blowing of the middle layer: fusing 70% of high-performance PE polymer and 50% of polypropylene to form a middle layer, heating the middle layer to 160-175 ℃ by film blowing, melting raw materials, and extruding;
s3: inner layer film blowing: taking low-soluble-fat polyethylene, high-density polyethylene and the rest 70% of high-performance PE polymer as inner layers, heating the inner layers to 160-165 ℃ for film blowing, melting raw materials, and extruding;
s4: total fusion: melting raw materials of each layer, and performing total fusion on the outer layer, the middle layer and the inner layer in an extrusion ratio of 3:5: 2;
s5: shaping and cooling: extruding the total fused raw materials into a film, controlling the total extrusion speed of the film at 16-18 m/min, and shaping and cooling.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, by changing the formula of the film, the added high-performance PE polymer can enable the film to have appearance texture, strong tensile force, strong toughness and strong impact resistance; the added metallocene polyethylene A can ensure that the film has better hardness and stiffness and the tensile strength of the film is stronger; the added low-fat polyethylene can ensure that the film has better tear resistance, good toughness and excellent heat seal performance; the added polypropylene can ensure that the film has better transparency and smoothness; the processing technology of the invention is more scientific and reasonable, the processing efficiency is high, the processed film can be widely applied to food packaging bags, garbage bags, shopping bags and the like, the practicability is strong, and the popularization is facilitated.
Drawings
FIG. 1 is a diagram showing the structure of the formulation of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Referring to fig. 1, the present invention provides a technical solution:
example 1:
a novel high-temperature-resistant creep-resistant blown film formula comprises the following components in percentage by mass: 5% of polypropylene, 40% of high-performance PE polymer, 30% of metallocene polyethylene A, 10% of low-fat polyethylene and 15% of high-density polyethylene.
Further, the high performance PE polymer has a melt index of 26 g/10 min and a density of 0.92 g/cm 3.
Further, metallocene polyethylene A had a melt index of 13 g/10 min and a density of 0.93 g/cm 3.
Further, the low-fat polyethylene had a melt index of 0.5 g/10 min and a density of 0.91 g/cm 3.
Further, the polypropylene has a melt index of 9 g/10 min and a density of 0.851 g/cm 3.
A processing technology of a novel high-temperature-resistant creep-resistant blown film comprises the following steps:
s1: and (3) outer layer film blowing: fusing 50% of polypropylene and metallocene polyethylene A to form an outer layer, heating the outer layer to 130 ℃ by film blowing, melting the raw materials, and extruding;
s2: film blowing of the middle layer: fusing 70% of high-performance PE polymer and 50% of polypropylene to form a middle layer, heating the middle layer to 160 ℃ by film blowing, melting the raw materials, and extruding;
s3: inner layer film blowing: taking low-fat polyethylene, high-density polyethylene and the rest 70% of high-performance PE polymer as inner layers, heating the inner layers to 160 ℃ for film blowing, melting the raw materials, and extruding;
s4: total fusion: melting raw materials of each layer, and performing total fusion on the outer layer, the middle layer and the inner layer in an extrusion ratio of 3:5: 2;
s5: shaping and cooling: extruding the total fused raw materials into a film, and controlling the total extrusion speed of the film at 16 m/min for shaping and cooling.
Example 2:
a novel high-temperature-resistant creep-resistant blown film formula comprises the following components in percentage by mass: 5% of polypropylene, 45% of high-performance PE polymer, 20% of metallocene polyethylene A, 10% of low-fat-soluble polyethylene and 15% of high-density polyethylene.
Further, the high performance PE polymer had a melt index of 26 g/10 min and a density of 0.956 g/cm 3.
Further, metallocene polyethylene A had a melt index of 13 g/10 min and a density of 0.93 g/cm 3.
Further, the low-fat polyethylene had a melt index of 0.5 g/10 min and a density of 0.91 g/cm 3.
Further, the polypropylene has a melt index of 9 g/10 min and a density of 0.878 g/cm 3.
A processing technology of a novel high-temperature-resistant creep-resistant blown film comprises the following steps:
s1: and (3) outer layer film blowing: fusing 50% of polypropylene and metallocene polyethylene A to form an outer layer, heating the outer layer to 140 ℃ by film blowing, melting the raw materials, and extruding;
s2: film blowing of the middle layer: fusing 70% of high-performance PE polymer and 50% of polypropylene to form a middle layer, heating the middle layer to 170 ℃ by film blowing, melting the raw materials, and extruding;
s3: inner layer film blowing: taking low-fat polyethylene, high-density polyethylene and the rest 70% of high-performance PE polymer as inner layers, heating the inner layers to 162 ℃ for film blowing, melting the raw materials, and extruding;
s4: total fusion: melting raw materials of each layer, and performing total fusion on the outer layer, the middle layer and the inner layer in an extrusion ratio of 3:5: 2;
s5: shaping and cooling: extruding the total fused raw materials into a film, and controlling the total extrusion speed of the film at 17 m/min for shaping and cooling.
Example 3:
a novel high-temperature-resistant creep-resistant blown film formula comprises the following components in percentage by mass: 10% of polypropylene, 50% of high-performance PE polymer, 25% of metallocene polyethylene A, 5% of low-fat polyethylene and 10% of high-density polyethylene.
Further, the high performance PE polymer has a melt index of 26 g/10 min and a density of 0.9708 g/cm 3.
Further, metallocene polyethylene A had a melt index of 13 g/10 min and a density of 0.93 g/cm 3.
Further, the low-fat polyethylene had a melt index of 0.5 g/10 min and a density of 0.91 g/cm 3.
Further, the polypropylene has a melt index of 9 g/10 min and a density of 0.935 g/cm 3.
A processing technology of a novel high-temperature-resistant creep-resistant blown film comprises the following steps:
s1: and (3) outer layer film blowing: fusing 50% of polypropylene and metallocene polyethylene A to form an outer layer, heating the outer layer to 150 ℃ by film blowing, melting the raw materials, and extruding;
s2: film blowing of the middle layer: fusing 70% of high-performance PE polymer and 50% of polypropylene to form a middle layer, heating the middle layer to 175 ℃ by film blowing, melting the raw materials, and extruding;
s3: inner layer film blowing: taking low-fat polyethylene, high-density polyethylene and the rest 70% of high-performance PE polymer as inner layers, heating the inner layers to 165 ℃ for film blowing, melting raw materials, and extruding;
s4: total fusion: melting raw materials of each layer, and performing total fusion on the outer layer, the middle layer and the inner layer in an extrusion ratio of 3:5: 2;
s5: shaping and cooling: extruding the total fused raw materials into a film, and controlling the total extrusion speed of the film at 18 m/min for shaping and cooling.
The three groups of embodiments can be taken as embodiments of the invention, wherein the embodiment 2 is most preferable, and the appearance texture, the tensile force and the toughness of the film are strong, and the impact resistance is strong by adding the high-performance PE polymer through changing the formula of the film; the added metallocene polyethylene A can ensure that the film has better hardness and stiffness and the tensile strength of the film is stronger; the added low-fat polyethylene can ensure that the film has better tear resistance, good toughness and excellent heat seal performance; the added polypropylene can ensure that the film has better transparency and smoothness; the processing technology of the invention is more scientific and reasonable, the processing efficiency is high, the processed film can be widely applied to food packaging bags, garbage bags, shopping bags and the like, the practicability is strong, and the popularization is facilitated.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The novel high-temperature-resistant creep-resistant blown film formula is characterized by comprising the following components in percentage by mass: 5-10% of polypropylene, 40-50% of high-performance PE polymer, 20-30% of metallocene polyethylene A, 5-10% of low-fat polyethylene and 10-15% of high-density polyethylene.
2. The novel high temperature and creep resistant blown film formulation of claim 1, comprising the following ingredients (in mass percent): 5% of polypropylene, 40% of high-performance PE polymer, 30% of metallocene polyethylene A, 10% of low-fat polyethylene and 15% of high-density polyethylene.
3. The novel high temperature and creep resistant blown film formulation of claim 1, comprising the following ingredients (in mass percent): 5% of polypropylene, 45% of high-performance PE polymer, 20% of metallocene polyethylene A, 10% of low-fat-soluble polyethylene and 15% of high-density polyethylene.
4. The novel high temperature and creep resistant blown film formulation of claim 1, comprising the following ingredients (in mass percent): 10% of polypropylene, 50% of high-performance PE polymer, 25% of metallocene polyethylene A, 5% of low-fat polyethylene and 10% of high-density polyethylene.
5. The novel high temperature and creep resistant blown film formulation of any one of claims 1-4, wherein: the high performance PE polymer has a melt index of 26 g/10 min and a density of 0.910 to 0.9708 g/cm 3.
6. The novel high temperature and creep resistant blown film formulation of any one of claims 1-4, wherein: the metallocene polyethylene A had a melt index of 13 g/10 min and a density of 0.93 g/cm 3.
7. The novel high temperature and creep resistant blown film formulation of any one of claims 1-4, wherein: the low-fat polyethylene has a melt index of 0.5 g/10 min and a density of 0.91 g/cm 3.
8. The novel high temperature and creep resistant blown film formulation of any one of claims 1-4, wherein: the polypropylene has a melt index of 9 g/10 min and a density of 0.851-0.935 g/cm 3.
9. A process for the production of a new high temperature resistant creep resistant blown film according to any one of claims 1 to 8, comprising the steps of:
s1: and (3) outer layer film blowing: fusing 50% of polypropylene and metallocene polyethylene A to form an outer layer, heating the outer layer to the film blowing temperature of 130-150 ℃ to melt raw materials, and extruding;
s2: film blowing of the middle layer: fusing 70% of high-performance PE polymer and 50% of polypropylene to form a middle layer, heating the middle layer to 160-175 ℃ by film blowing, melting raw materials, and extruding;
s3: inner layer film blowing: taking low-soluble-fat polyethylene, high-density polyethylene and the rest 70% of high-performance PE polymer as inner layers, heating the inner layers to 160-165 ℃ for film blowing, melting raw materials, and extruding;
s4: total fusion: melting raw materials of each layer, and performing total fusion on the outer layer, the middle layer and the inner layer in an extrusion ratio of 3:5: 2;
s5: shaping and cooling: extruding the total fused raw materials into a film, controlling the total extrusion speed of the film at 16-18 m/min, and shaping and cooling.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103421236A (en) * | 2012-05-23 | 2013-12-04 | 中国石油化工股份有限公司 | Polypropylene composition and polypropylene blown film |
| CN104311949A (en) * | 2014-10-11 | 2015-01-28 | 中国石油化工股份有限公司 | High-strength polyethylene material for preparing heat shrinkable film, and preparation method of high-strength polyethylene material |
| CN110154478A (en) * | 2019-06-11 | 2019-08-23 | 福建富一锦科技有限公司 | A kind of transparent milk packaging film and preparation method thereof |
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- 2019-11-26 CN CN201911170918.XA patent/CN112848575A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103421236A (en) * | 2012-05-23 | 2013-12-04 | 中国石油化工股份有限公司 | Polypropylene composition and polypropylene blown film |
| CN104311949A (en) * | 2014-10-11 | 2015-01-28 | 中国石油化工股份有限公司 | High-strength polyethylene material for preparing heat shrinkable film, and preparation method of high-strength polyethylene material |
| CN110154478A (en) * | 2019-06-11 | 2019-08-23 | 福建富一锦科技有限公司 | A kind of transparent milk packaging film and preparation method thereof |
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