CN110816004A - Ultralow-temperature PE (polyethylene) membrane and raw material process thereof - Google Patents
Ultralow-temperature PE (polyethylene) membrane and raw material process thereof Download PDFInfo
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- CN110816004A CN110816004A CN201911131861.2A CN201911131861A CN110816004A CN 110816004 A CN110816004 A CN 110816004A CN 201911131861 A CN201911131861 A CN 201911131861A CN 110816004 A CN110816004 A CN 110816004A
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- film
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- parts
- middle layer
- outer layer
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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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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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
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
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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
- B29C48/16—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
- B32B27/06—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
-
- 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- 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
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/242—All polymers belonging to those covered by group B32B27/32
-
- 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
- B32B2439/70—Food packaging
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses an ultra-low temperature PE film and a raw material process thereof, which comprises a film outer layer, a film middle layer and a film inner layer, wherein the film middle layer is arranged on one side of the film inner layer, the film inner layer and the film middle layer are fused together through three-layer co-extrusion, the film outer layer is arranged on one side of the film middle layer, and the film middle layer and the film outer layer are fused together through three-layer co-extrusion.
Description
Technical Field
The invention relates to the technical field of plastic packaging bags, in particular to an ultralow-temperature PE film and a raw material process thereof.
Background
The plastic packing bag is a kind of packing bag which uses plastic as raw material and is used for producing various articles in daily life, and is widely used in daily life and industrial production, the common plastic packing bag is mostly a film which is made by using polyethylene as inner layer material and compounding PET, PET aluminizing, aluminum foil, PA and other materials, the film is nontoxic, so it can be used for containing food, the other film is made of polyvinyl chloride, the polyvinyl chloride itself is also nontoxic, but the additive added according to the purpose of the film is harmful to human body, and has a certain toxicity, so the film and the plastic bag made of the film are not suitable for containing food.
The plastic packaging bag is a common packaging bag on the market at present, the plastic packaging bag generally needs to be subjected to an inner layer heat sealing process to form a sealed packaging bag, the heat sealing temperature of PE is generally about 120 ℃, the plastic packaging bag is generally made of a multilayer composite material, when the plastic packaging bag is subjected to heat sealing, a film contacted with equipment is always an outermost film, at the temperature above 120 ℃, the outermost film is often folded and the like when contacting with an appearance defect caused by overlong high-temperature time, the inner layer is not heated to a temperature enough for heat sealing, the product after heat sealing is finished, the appearance defect is generated when the product is subjected to heat sealing, the product is not attractive enough, and even the waste product is generated because the outer layer heat sealing time is overlong.
Therefore, the problem to be solved by the inventor is to design a packaging film and a raw material process thereof, wherein the packaging film is used for reducing the heat sealing temperature of a plastic film, reducing the heat sealing time, ensuring the appearance quality of the film and improving the yield.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an ultralow temperature PE film and a raw material process thereof, which can realize the functions of reducing the heat sealing temperature of a plastic film, reducing the heat sealing time, ensuring the appearance quality of the film and improving the yield.
The technical scheme adopted by the invention for solving the technical problems is as follows: the ultra-low temperature PE film comprises a film outer layer, a film middle layer and a film inner layer, wherein the film middle layer is arranged on one side of the film inner layer, the film inner layer and the film middle layer are fused together through three-layer co-extrusion, the film outer layer is arranged on one side of the film middle layer, and the film middle layer and the film outer layer are fused together through three-layer co-extrusion.
A raw material process of an ultralow-temperature PE film comprises the following steps:
(1) the PE film comprises three components which are named as a film outer layer, a film middle layer and a film inner layer respectively;
(2) the raw materials required by the outer layer, the middle layer and the inner layer of the film are fully prepared;
(3) the outer layer of the film comprises 60 parts of linear low-density polyethylene and 40 parts of high-density polyethylene according to mass fraction, raw materials are prepared according to the proportion and are placed in a raw material cabin corresponding to the outer layer of the film;
(4) the film comprises a film middle layer, a film outer layer and a film inner layer, wherein the film middle layer comprises 60 parts of linear low-density polyethylene and 40 parts of high-density polyethylene according to mass fraction, raw materials are prepared according to the proportion and are placed in a raw material cabin corresponding to the film middle layer;
(5) the film comprises 65-76 parts of metallocene, 20 parts of high-density polyethylene, 0-7 parts of linear low-density polyethylene and 4-8 parts of an opening agent according to mass fraction, and raw materials are prepared according to a proportion and are placed in a raw material cabin corresponding to the film inner layer.
(6) The materials of the outer layer of the film, the middle layer of the film and the inner layer of the film are fused together by a three-layer co-extrusion process.
The invention has the beneficial effects that:
1. according to the invention, by adjusting the formula of the inner layer of the film and adding a large amount of metallocene, the heat sealing temperature of the packaging bag is reduced, and the functions of reducing the heat sealing temperature of the plastic film, reducing the heat sealing time, ensuring the appearance quality of the film and improving the yield are realized.
Drawings
FIG. 1 is a schematic diagram of the present invention.
FIG. 2 is a schematic view showing a heat-sealed state of the present invention.
Description of reference numerals: 1-a film outer layer; 2-film middle layer; 3-inner layer of film; 4-heat sealing; 5-outer layer of packaging bag; 6-PE film.
Detailed Description
The invention will now be further described with reference to specific examples, which are intended to be illustrative only and not to limit the scope of the invention. Further, it should be understood that various changes and modifications of the invention may be made by those skilled in the art after reading the teachings herein, and such equivalents may fall within the scope of the invention as defined in the appended claims.
The first embodiment is as follows:
referring to fig. 1 to 2, which are schematic structural diagrams and schematic heat-sealing state diagrams of the present invention, an ultra-low temperature PE film includes a film outer layer 1, a film middle layer 2, and a film inner layer 3, wherein the film middle layer 2 is disposed on one side of the film inner layer 3, the film inner layer 3 and the film middle layer 2 are co-extruded and fused together through three layers, the film outer layer 1 is disposed on one side of the film middle layer 2, and the film middle layer 2 and the film outer layer 1 are co-extruded and fused together through three layers.
A raw material process of an ultralow-temperature PE film comprises the following steps:
(1) the PE film comprises three components which are named as a film outer layer 1, a film middle layer 2 and a film inner layer 3 respectively;
(2) the raw materials needed by the outer film layer 1, the middle film layer 2 and the inner film layer 3 are prepared completely;
(3) the film outer layer 1 comprises 60 parts of linear low-density polyethylene and 40 parts of high-density polyethylene according to mass fraction, and raw materials are prepared according to the proportion and are placed in a raw material cabin corresponding to the film outer layer 1;
(4) the components of the film middle layer 2 are respectively 60 parts of linear low-density polyethylene and 40 parts of high-density polyethylene according to the mass fraction, and raw materials are prepared according to the proportion and are placed in a raw material cabin corresponding to the film middle layer 2;
(5) the film inner layer 3 comprises 65-76 parts of metallocene, 20 parts of high-density polyethylene, 0-7 parts of linear low-density polyethylene and 4-8 parts of an opening agent according to mass fraction, and raw materials are prepared according to a proportion and placed in a raw material cabin corresponding to the film inner layer 3.
(6) The materials of the three components of the film outer layer 1, the film middle layer 2 and the film inner layer 3 are fused together by a three-layer co-extrusion process.
Taking 20 parts of high-density polyethylene, 4 parts of an opening agent and 76 parts of metallocene which are ingredients of the inner layer 3 of the film mentioned in the step (5) as an example, the PE film 6 is produced by a blow molding processing technology through the formula, the thickness of the PE film is 6 threads, namely 0.06mm, and a plastic packaging bag is produced by the film, heat sealing is carried out under the pressure of 0.3MPa, the plastic packaging bag produced by the common PE plastic film is heat sealed under the same condition, the heat sealing temperature is required to be 120 ℃, and the heat sealing time is more than 2s, the heat sealing time of the invention is 1s, and the heat sealing temperature is only 80 ℃ to 90 ℃, the melting point of the inner layer 3 of the film is reduced by changing the raw material proportion of the inner layer 3 of the PE film 6, a large amount of metallocene is added, so that the melting point of the inner layer 3 of the film is reduced from about 120 ℃ to between 80 ℃ and 90 ℃, the melting point of the inner layer, the heating time is reduced, so that when the heat-sealing head 4 contacts the outer layer 5 of the plastic packaging bag, the time required for the inner layer 3 of the film to heat to 80 ℃ is obviously shorter than the time required for the inner layer 3 of the film to heat to 120 ℃, and the visual effect brought by the shortened heating time is that the direct contact time of the outer layer 1 of the film and the heat-sealing head 4 is reduced, so that the outer layer 1 of the film cannot be in thermal contact with the heat-sealing head 4 for a long time to cause the appearance change of the outer layer 1 of the film or even be scrapped.
According to the invention, by adjusting the formula of the inner layer 3 of the film and adding a large amount of metallocene, the heat sealing temperature of the packaging bag is reduced, the functions of reducing the heat sealing temperature of the plastic film, reducing the heat sealing time, ensuring the appearance quality of the film and improving the yield are realized.
Claims (2)
1. An ultra-low temperature PE membrane, characterized in that: the novel plastic film comprises a film outer layer, a film middle layer and a film inner layer, wherein the film middle layer is arranged on one side of the film inner layer, the film inner layer and the film middle layer are fused together through three-layer co-extrusion, the film outer layer is arranged on one side of the film middle layer, and the film middle layer and the film outer layer are fused together through three-layer co-extrusion.
2. A raw material process of an ultralow-temperature PE film comprises the following steps:
(1) the PE film comprises three components which are named as a film outer layer, a film middle layer and a film inner layer respectively;
(2) the raw materials required by the outer layer, the middle layer and the inner layer of the film are fully prepared;
(3) the outer layer of the film comprises 60 parts of linear low-density polyethylene and 40 parts of high-density polyethylene according to mass fraction, raw materials are prepared according to the proportion and are placed in a raw material cabin corresponding to the outer layer of the film;
(4) the film comprises a film middle layer, a film outer layer and a film inner layer, wherein the film middle layer comprises 60 parts of linear low-density polyethylene and 40 parts of high-density polyethylene according to mass fraction, raw materials are prepared according to the proportion and are placed in a raw material cabin corresponding to the film middle layer;
(5) the film comprises 65 to 76 parts of metallocene, 20 parts of high-density polyethylene, 0 to 7 parts of linear low-density polyethylene and 4 to 8 parts of an opening agent according to mass fraction, and raw materials are prepared according to the proportion and are placed in a raw material cabin corresponding to the film inner layer;
(6) the materials of the outer layer of the film, the middle layer of the film and the inner layer of the film are fused together by a three-layer co-extrusion process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911131861.2A CN110816004A (en) | 2019-11-19 | 2019-11-19 | Ultralow-temperature PE (polyethylene) membrane and raw material process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911131861.2A CN110816004A (en) | 2019-11-19 | 2019-11-19 | Ultralow-temperature PE (polyethylene) membrane and raw material process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN110816004A true CN110816004A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911131861.2A Pending CN110816004A (en) | 2019-11-19 | 2019-11-19 | Ultralow-temperature PE (polyethylene) membrane and raw material process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111572861A (en) * | 2020-05-15 | 2020-08-25 | 北京爱蜂科技有限公司 | Method for packaging collection |
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| CN102416746A (en) * | 2011-08-05 | 2012-04-18 | 大连方盛塑料有限公司 | Plastic substrate film for food packaging and processing technology thereof |
| CN102719200A (en) * | 2012-06-21 | 2012-10-10 | 佛山新长盛塑料薄膜有限公司 | High-stiffness high-strength heat-sealing embossed film and preparation method thereof |
| CN104191766A (en) * | 2014-09-03 | 2014-12-10 | 黄山永新股份有限公司 | Polyethylene film, packaging composite film and preparation method thereof |
| CN104477509A (en) * | 2014-11-21 | 2015-04-01 | 宿州市紫金塑业有限公司 | Black and white preservative film composite package |
| CN109291592A (en) * | 2018-11-09 | 2019-02-01 | 江苏科默斯包装材料有限公司 | A kind of packaging film and thereon blowing production technique |
| CN110370765A (en) * | 2019-08-09 | 2019-10-25 | 黄山永新股份有限公司 | A kind of resistance to boiling freeze-resistant curtain coating polyethylene film and its production method |
-
2019
- 2019-11-19 CN CN201911131861.2A patent/CN110816004A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416746A (en) * | 2011-08-05 | 2012-04-18 | 大连方盛塑料有限公司 | Plastic substrate film for food packaging and processing technology thereof |
| CN102719200A (en) * | 2012-06-21 | 2012-10-10 | 佛山新长盛塑料薄膜有限公司 | High-stiffness high-strength heat-sealing embossed film and preparation method thereof |
| CN104191766A (en) * | 2014-09-03 | 2014-12-10 | 黄山永新股份有限公司 | Polyethylene film, packaging composite film and preparation method thereof |
| CN104477509A (en) * | 2014-11-21 | 2015-04-01 | 宿州市紫金塑业有限公司 | Black and white preservative film composite package |
| CN109291592A (en) * | 2018-11-09 | 2019-02-01 | 江苏科默斯包装材料有限公司 | A kind of packaging film and thereon blowing production technique |
| CN110370765A (en) * | 2019-08-09 | 2019-10-25 | 黄山永新股份有限公司 | A kind of resistance to boiling freeze-resistant curtain coating polyethylene film and its production method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111572861A (en) * | 2020-05-15 | 2020-08-25 | 北京爱蜂科技有限公司 | Method for packaging collection |
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Application publication date: 20200221 |