CN112477340A - High-low temperature PE film and preparation method thereof - Google Patents
High-low temperature PE film and preparation method thereof Download PDFInfo
- Publication number
- CN112477340A CN112477340A CN201910864250.2A CN201910864250A CN112477340A CN 112477340 A CN112477340 A CN 112477340A CN 201910864250 A CN201910864250 A CN 201910864250A CN 112477340 A CN112477340 A CN 112477340A
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- CN
- China
- Prior art keywords
- layer
- film
- polyethylene
- temperature
- metallocene
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- 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
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- 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
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
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- 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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- 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
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a high-low temperature PE film and a preparation method thereof, which consists of an outer layer, a middle layer and an inner layer which are sequentially compounded together; the outer layer is as follows: 10% -20% of polyethylene and 80% -90% of polypropylene metallocene; the middle layer is: 20% -30% of linear polyethylene, 30% of polyethylene metallocene, 30% of polyolefin elastomer and 10% -20% of polypropylene metallocene; the inner layer is: 20-30% of low-density polyethylene, 30% of linear polyethylene and 40-50% of polyethylene metallocene. Because the heat sealing temperature difference of the inner layer and the outer layer of the PE film reaches 40 ℃, the outer layer formula realizes that the outer layer of the PE film can resist the temperature of 120 ℃ at most, namely the heat sealing temperature is 120 ℃, and the inner layer formula realizes that the inner layer of the PE film can be heat sealed at 80 ℃, thereby realizing that the single-layer PE film can be made into the wide-edge sealing bag, realizing the 100% recoverable requirement of the single-layer composite self-supporting zipper bag and having better environmental protection.
Description
Technical Field
The invention relates to a packaging film, in particular to a high-low temperature PE film and a preparation method thereof.
Background
The packaging film is mainly formed by the resin mixture extrusion of several kinds of different brands, has anti puncture, and super strength high performance twines the packing to the goods of stacking on the layer board, makes the packing material more firm clean and tidy, and superstrong waterproof effect is widely used, at foreign trade export, papermaking, five metals, plastics chemical industry, building materials, food and medicine trade. The heat-sealing temperature of the inner layer and the outer layer of the existing PE film is basically not deviated or slightly deviated, a single-layer PE film cannot be used for sealing a bag on a wide edge, and a multi-layer composite bag can meet the performance requirement, the outer layer mostly adopts PET, NY and other temperature-resistant materials, the bag forming requirement can be realized, but the environment-friendly recycling cannot be realized. The same material has high and low temperature, and the industry needs to break through urgently, particularly, the self-supporting zipper bag is beneficial to 100 percent recovery and regeneration.
Disclosure of Invention
The invention aims to provide a high-low temperature PE film which has good environmental protection and can be used for preparing wide-edge sealing bags from a single-layer PE film.
The invention also aims to provide a preparation method of the high-low temperature PE film.
In order to achieve the purpose, the technical solution of the invention is as follows:
the invention relates to a high-low temperature PE film, which consists of an outer layer, a middle layer and an inner layer which are co-extruded together in multiple layers;
the outer layer comprises the following components in percentage by mass: 10% -20% of polyethylene and 80% -90% of polypropylene metallocene;
the middle layer comprises the following components in percentage by mass: 20% -30% of linear polyethylene, 30% of polyethylene metallocene, 30% of polyolefin elastomer and 10% -20% of polypropylene metallocene;
the inner layer comprises the following components in percentage by mass: 20-30% of low-density polyethylene, 30% of linear polyethylene and 40-50% of polyethylene metallocene.
The invention relates to a preparation method of a high-low temperature PE film, which comprises the following steps: (1) fully mixing materials for preparing the outer layer, the middle layer and the inner layer respectively through a high-speed kneader, and respectively placing the materials in different material storage devices in equipment for standing for later use; (2) respectively setting the temperature of each section in the equipment and the temperature of an annular die orifice on three-layer co-extrusion equipment, wherein the temperature of each section is 170-198 ℃; (3) when the temperature reaches, the mixture is extruded by three extruder devices at the same time and mixed in a mixer to be blown and molded at the same annular die orifice, and the high-low temperature PE film is prepared.
After the scheme is adopted, compared with the conventional PE film, the PE film disclosed by the invention has the advantages that the outer layer and the outer layer are subjected to heat sealing by using an automatic temperature control sealing tester, the inner layer and the outer layer are subjected to heat sealing comparison, the outer layer of the PE film can resist the temperature of 120 ℃ at most by using the outer layer formula, namely the heat sealing temperature is 120 ℃, the inner layer of the PE film can be subjected to heat sealing at 80 ℃ by using the inner layer formula, the heat sealing temperature difference between the inner layer and the outer layer reaches 40 ℃, and the single-layer PE film can be manufactured into a wide-edge sealing bag (a composite self-supporting zipper bag), so that a composite bag with a partial composite structure is replaced to a great extent, the 100% recoverable requirement of the single-layer composite self-supporting zipper bag.
The present invention will be further described with reference to the following examples.
Detailed Description
The invention relates to a high-low temperature PE film, which consists of an outer layer, a middle layer and an inner layer which are sequentially compounded together;
the outer layer comprises the following components in percentage by mass: 10% -20% of polyethylene (model LD-Q281), 80% -90% of polypropylene metallocene (model W5 t);
the middle layer comprises the following components in percentage by mass: 20% -30% of linear polyethylene (model LLD 7042), 30% of polyethylene metallocene (model SP 1520), 30% of polyolefin elastomer (model A1085S) and 10% -20% of polypropylene metallocene (model W5 t);
the inner layer comprises the following components in percentage by mass: 20% -30% of low-density polyethylene (model LD 2420K), 30% of linear polyethylene (model LLD 7042) and 40% -50% of polyethylene metallocene (model 0510H).
The invention relates to a method for preparing a high-low temperature PE film, which comprises the following steps:
(1) fully mixing materials for preparing the outer layer, the middle layer and the inner layer respectively through a high-speed kneader, and respectively placing the materials in different material storage devices in equipment for standing for later use;
(2) respectively setting the temperature of each section of annular die orifice in the three-layer co-extrusion equipment, wherein the temperature of each section is 170-198 ℃;
(3) and when the temperature reaches, extruding by three extruding devices, mixing in a mixer, and performing inflation molding at the same annular die to obtain the high-low temperature PE film.
The working principle of the invention is as follows:
the premise of a broadside envelope is that the inner and outer layer temperatures must be sufficiently different to achieve a sufficient heat seal temperature differential, which is typically achieved by compounding at least two layers of different materials (different materials having different heat seal temperatures). The invention realizes the heat sealing temperature difference between the inner surface and the outer surface of a single-layer material, utilizes the molecular weight of the same material to carry out reasonable mixing configuration, obtains different density values, further changes the temperature resistance performance, has no heat sealing requirement on the middle layer, and is mainly used for improving the mechanical performance of the material and improving the tensile strength and the puncture resistance of the film. The wide-edge bag making requirement can be met without compounding other materials due to large internal and external temperature difference, so that 100% recovery can be realized (the traditional compound bag cannot be realized).
The detection method comprises the following steps:
the sealing strength and the tensile strength of the invention are tested by an automatic tensile testing machine to check whether the mechanical property requirement is met, and the puncture resistance effect of the film is tested by a pendulum testing instrument to verify whether the film reaches the standard.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents and modifications within the scope of the description.
Claims (2)
1. A high and low temperature PE film is characterized in that: consists of an outer layer, a middle layer and an inner layer which are co-extruded together;
the outer layer comprises the following components in percentage by mass: 10% -20% of polyethylene and 80% -90% of polypropylene metallocene;
the middle layer comprises the following components in percentage by mass: 20% -30% of linear polyethylene, 30% of polyethylene metallocene, 30% of polyolefin elastomer and 10% -20% of polypropylene metallocene;
the inner layer comprises the following components in percentage by mass: 20-30% of low-density polyethylene, 30% of linear polyethylene and 40-50% of polyethylene metallocene.
2. A method for preparing a high and low temperature PE film according to claim 1, characterized in that: the method comprises the following steps: (1) fully mixing materials for preparing the outer layer, the middle layer and the inner layer respectively through a high-speed kneader, and respectively placing the materials in different material storage devices in equipment for standing for later use; (2) respectively setting the temperature of each section in the equipment and the temperature of an annular die orifice on three-layer co-extrusion equipment, wherein the temperature of each section is 170-198 ℃; (3) when the temperature reaches, the mixture is extruded by three extruder devices at the same time and mixed in a mixer to be blown and molded at the same annular die orifice, and the high-low temperature PE film is prepared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910864250.2A CN112477340A (en) | 2019-09-12 | 2019-09-12 | High-low temperature PE film and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910864250.2A CN112477340A (en) | 2019-09-12 | 2019-09-12 | High-low temperature PE film and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112477340A true CN112477340A (en) | 2021-03-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910864250.2A Pending CN112477340A (en) | 2019-09-12 | 2019-09-12 | High-low temperature PE film and preparation method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN112477340A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102225644A (en) * | 2011-04-02 | 2011-10-26 | 黄山永新股份有限公司 | Heat sealing film and preparation method thereof |
| CN109605890A (en) * | 2019-01-21 | 2019-04-12 | 河南省银丰塑料有限公司 | Three-layer co-extruded ultra-low temperature heat sealing packing film |
| CN109648899A (en) * | 2019-01-21 | 2019-04-19 | 河南省银丰塑料有限公司 | A kind of polyethylene flour bag packaging dedicated film |
| JP2019107848A (en) * | 2017-12-20 | 2019-07-04 | 三菱ケミカル株式会社 | Polyolefin resin laminate film and medical package |
| CN109968772A (en) * | 2019-04-16 | 2019-07-05 | 安徽双津实业有限公司 | A kind of PP/PE co-extrusion high-isolation film and preparation method thereof |
| CN110202886A (en) * | 2019-07-04 | 2019-09-06 | 河南耐可达彩色印刷有限公司 | A kind of low-temperature polyethylene film |
-
2019
- 2019-09-12 CN CN201910864250.2A patent/CN112477340A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102225644A (en) * | 2011-04-02 | 2011-10-26 | 黄山永新股份有限公司 | Heat sealing film and preparation method thereof |
| JP2019107848A (en) * | 2017-12-20 | 2019-07-04 | 三菱ケミカル株式会社 | Polyolefin resin laminate film and medical package |
| CN109605890A (en) * | 2019-01-21 | 2019-04-12 | 河南省银丰塑料有限公司 | Three-layer co-extruded ultra-low temperature heat sealing packing film |
| CN109648899A (en) * | 2019-01-21 | 2019-04-19 | 河南省银丰塑料有限公司 | A kind of polyethylene flour bag packaging dedicated film |
| CN109968772A (en) * | 2019-04-16 | 2019-07-05 | 安徽双津实业有限公司 | A kind of PP/PE co-extrusion high-isolation film and preparation method thereof |
| CN110202886A (en) * | 2019-07-04 | 2019-09-06 | 河南耐可达彩色印刷有限公司 | A kind of low-temperature polyethylene film |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210312 |
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