CN104512080B - Low temperature resistant fall film and application thereof - Google Patents
Low temperature resistant fall film and application thereof Download PDFInfo
- Publication number
- CN104512080B CN104512080B CN201410768811.6A CN201410768811A CN104512080B CN 104512080 B CN104512080 B CN 104512080B CN 201410768811 A CN201410768811 A CN 201410768811A CN 104512080 B CN104512080 B CN 104512080B
- Authority
- CN
- China
- Prior art keywords
- density polyethylene
- low density
- mlldpe
- film
- temperature drop
- 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.)
- Active
Links
- 239000002994 raw material Substances 0.000 claims abstract description 59
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 36
- 229920001526 metallocene linear low density polyethylene Polymers 0.000 claims abstract description 33
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 24
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 24
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 24
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 24
- 238000004806 packaging method and process Methods 0.000 claims description 34
- 239000004595 color masterbatch Substances 0.000 claims description 5
- 239000012141 concentrate Substances 0.000 claims description 4
- 239000012748 slip agent Substances 0.000 claims description 4
- 239000010408 film Substances 0.000 abstract description 82
- 239000004594 Masterbatch (MB) Substances 0.000 abstract description 8
- 239000010409 thin film Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 30
- 238000000034 method Methods 0.000 description 17
- 230000008569 process Effects 0.000 description 11
- 239000004698 Polyethylene Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000011552 falling film Substances 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 238000000071 blow moulding Methods 0.000 description 7
- 238000013329 compounding Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 7
- 238000003851 corona treatment Methods 0.000 description 7
- 238000001125 extrusion Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 238000005406 washing Methods 0.000 description 7
- 238000004804 winding Methods 0.000 description 7
- 238000010101 extrusion blow moulding Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 229920006267 polyester film Polymers 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 239000003599 detergent Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010096 film blowing Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 101000983338 Solanum commersonii Osmotin-like protein OSML15 Proteins 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
Landscapes
- Wrappers (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides and a kind of low temperature resistant fall film and application thereof.Film includes outer layer, intermediate layer and internal layer successively；Wherein, the raw materials by weight meter forming outer layer includes: 50～first low density polyethylene (LDPE) of the first LLDPE, 15～25% of 70% and 15～first metallocene linear-low density polyethylene of 25%；The raw materials by weight meter forming intermediate layer includes: 15～second metallocene linear-low density polyethylene of the second low density polyethylene (LDPE), 30～50% of the second LLDPE, 15～25% of 25% and 15～the Masterbatch of 25%；The raw materials by weight meter forming internal layer includes: 95～the 3rd metallocene linear-low density polyethylene, 1～the opening agent of 2.5% of 98% and 1～the slipping agent of 2.5%.This thin film strength and anti-puncture performance are high, and its intermediate layer is good with the caking property of ectonexine, has the higher low temperature resistant property fallen simultaneously.
Description
Technical Field
The invention relates to the field of film production and processing, in particular to a low-temperature-drop-resistant film and application thereof.
Background
Along with the increasing importance of people on health and hygiene in recent years, the types of washing liquid are not short, the demand is increasing, and washing products become necessary for people to live. Compared with solid washing liquid articles, the washing liquid has good water solubility, does not need manual dissolution, is more convenient to use, and is particularly suitable for frequent washing needs of urban people. However, since the washing liquid has high fluidity and certain chemical corrosiveness, the washing liquid must be packaged before being sold.
In the existing standing type packaging bag for packaging the laundry detergent in the market, the material structure of the packaging bag film is usually PET12/PA15/PE milky white 100-200 μm (meaning: PET thickness is 12 μm, dry type composite PA thickness is 15 μm, and then dry type composite PE milky white film (PE milky white film thickness is 100 μm-200 μm).
The partial standing type packaging bag is made of PET12/PE milk with the particle size of 120-150 mu m. However, the packaging bag made of the film material is easy to break when falling, and particularly, the packaging bag is crisp under the condition that the temperature is lower than zero in winter in the north, so that the breaking rate of the product is higher. The main reason is that the performance of the PE film can not meet the requirement, and the PE film can become hard and brittle at low temperature, so that the probability of bag breakage of the produced product when the product falls off at low temperature is high. And currently, no low-temperature drop resistant film product capable of being produced in batches is available in the field temporarily.
In order to solve the problem that a standing type packaging bag in the prior art is high in bag breaking rate when falling at low temperature, a low-temperature-resistant falling film is required to be provided.
Disclosure of Invention
The invention mainly aims to provide a low-temperature-drop-resistant film and application thereof, and aims to solve the problem that a standing packaging bag in the prior art is poor in low-temperature-drop-resistant performance.
In order to achieve the above object, according to one aspect of the present invention, there is provided a low temperature drop resistant film comprising an outer layer, an intermediate layer, and an inner layer in this order; wherein, the raw materials for forming the outer layer comprise the following components in percentage by weight: 50-70% of a first linear low density polyethylene, 15-25% of a first low density polyethylene and 15-25% of a first metallocene linear low density polyethylene; the raw materials for forming the middle layer comprise the following components in percentage by weight: 15-25% of second linear low density polyethylene, 15-25% of second low density polyethylene, 30-50% of second metallocene linear low density polyethylene and 15-25% of color master batch; the raw materials for forming the inner layer comprise the following components in percentage by weight: 95-98% of third metallocene linear low density polyethylene, 1-2.5% of an opening agent and 1-2.5% of a slipping agent.
Further, the low temperature drop resistant film has a 1.5m drop breakage rate of less than 10% at the temperature of-18 ℃.
Further, in the inner layer, the third metallocene linear low density polyethylene is selected from one or more of MLLDPE-SP2020, MLLDPE-SP0510 and MLLDPE-SP 0540.
Further, the raw materials for forming the inner layer comprise the following components in percentage by weight: 70-85% of MLLDPE-SP2020, 13-25% of MLLDPE-SP0510, 1-2.5% of a mouth-opening agent and 1-2.5% of a slipping agent.
Further, in the above outer layer, the first linear low density polyethylene is selected from LLDPE-7042 and/or 201 XV; the first low density polyethylene is selected from LDPE-2420H and/or LDPE-2420D; the first metallocene linear low density polyethylene is selected from one or more of MLLDPE-SP1520, MLLDPE-SP0510 and MLLDPE-SP 0540.
Further, in the intermediate layer, the second linear low density polyethylene is selected from one or more of LLDPE-2045, LLDPE-7042 and 201 XV; the second low density polyethylene is selected from LDPE-2426H and/or LDPE-2426D; the second metallocene linear low density polyethylene is selected from MLLDPE-SP0510 and/or MLLDPE-SP 0540.
Further, in the low-temperature drop resistant film, the weight percentage of the outer layer is 20-30%, the weight percentage of the middle layer is 40-60%, and the weight percentage of the inner layer is 20-30%.
Furthermore, in the low-temperature drop resistant film, the thickness ratio of the outer layer to the middle layer to the inner layer is 1: 1-2.
Further, the color master batch is selected from white master batch 58890.
Further, the opening agent is selected from an opening agent EAZ-10, and the slipping agent is selected from a slipping agent ESQ-4.
According to another aspect of the present invention, there is provided a use of a low temperature drop resistant film in a stand-up packaging bag.
The invention provides a low-temperature drop resistant film and application thereof. Wherein the outer layer comprises a first linear low density polyethylene, a first low density polyethylene and a first metallocene linear low density polyethylene. The outer layer has high strength and puncture resistance due to the fact that the polyethylene containing the different types is adopted. The color master is adopted in the middle layer, so that the film has different colors, and meanwhile, the middle layer contains second linear low-density polyethylene, second low-density polyethylene and second metallocene linear low-density polyethylene, so that the bonding strength of the layer and the inner and outer layers can be improved. More importantly, the third metallocene linear low-density polyethylene is used in the inner layer, so that the overall toughness of the film can be effectively improved, and the film can keep better toughness at a low temperature. Therefore, the low-temperature drop resistance of the film can be effectively improved, and the film is more suitable for being applied in a standing type packaging bag.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
As described in the background section, the conventional standing type packaging bag is prone to breakage when falling at low temperature. In order to solve the problem, the invention provides a low-temperature drop resistant film which sequentially comprises an outer layer, a middle layer and an inner layer; wherein, the raw materials for forming the outer layer comprise the following components in percentage by weight: 50-70% of a first linear low density polyethylene, 15-25% of a first low density polyethylene and 15-25% of a first metallocene linear low density polyethylene; the raw materials for forming the middle layer comprise the following components in percentage by weight: 15-25% of second linear low density polyethylene, 15-25% of second low density polyethylene, 30-50% of second metallocene linear low density polyethylene and 15-25% of color master batch; the raw materials for forming the inner layer comprise the following components in percentage by weight: 95-98% of third metallocene linear low density polyethylene, 1-2.5% of an opening agent and 1-2.5% of a slipping agent.
The low-temperature drop resistant film provided by the invention adopts a three-layer structure. Wherein the outer layer comprises a first linear low density polyethylene, a first low density polyethylene and a first metallocene linear low density polyethylene. The outer layer has high strength and puncture resistance due to the fact that the polyethylene containing the different types is adopted. The color master batch adopted in the middle layer can enable the film to have different colors, and meanwhile, the middle layer contains second linear low-density polyethylene, second low-density polyethylene and second metallocene linear low-density polyethylene, so that the bonding strength of the layer and the inner and outer layers can be improved. More importantly, the third metallocene linear low-density polyethylene is used in the inner layer, so that the overall toughness of the film can be effectively improved, and the film can keep better toughness at a low temperature. Therefore, the low-temperature drop resistance of the film can be effectively improved, and the film is more suitable for being applied in a standing type packaging bag.
Preferably, the low-temperature drop resistant film has a 1.5m drop breakage rate of less than 10% at the temperature of-18 ℃.
In the low temperature drop resistant film provided by the present invention, the third metallocene linear low density polyethylene used in the inner layer may be a metal linear low density polyethylene commonly used in the art. In a preferred embodiment, in the above inner layer, the third metallocene linear low density polyethylene is selected from one or more of MLLDPE-SP2020, MLLDPE-SP0510 and MLLDPE-SP 0540. The linear low-density polyethylene of the metals is used as the material of the inner layer of the film, so that the toughness of the film can be further improved, and the film has higher drop resistance in a low-temperature state.
In a more preferred embodiment, the raw materials of the inner layer of the low temperature drop resistant film comprise, by weight: 70-85% of MLLDPE-SP2020, 13-25% of MLLDPE-SP0510, 1-2.5% of a mouth-opening agent and 1-2.5% of a slipping agent. The MLLDPE-SP2020 adopted in the invention is an aging-resistant, high-toughness and high-strength metallocene linear low-density polyethylene material, and has good toughness and tensile strength at low temperature. According to the invention, the ratio of MLLDPE-SP2020 to other materials is controlled within the range, so that the toughness of the film in a low-temperature state can be effectively improved, and the low-temperature drop resistance of the film is improved.
In the low temperature drop resistant film provided by the present invention, the first linear low density polyethylene, the first low density polyethylene and the first metallocene linear low density polyethylene used in the outer layer may be of the types conventionally used in the art. In a preferred embodiment, the first linear low density polyethylene in the outer layer is selected from LLDPE-7042 and/or 201 XV; the first low density polyethylene is selected from LDPE-2420H and/or LDPE-2420D; the first metallocene linear low density polyethylene is selected from one or more of MLLDPE-SP1520, MLLDPE-SP0510 and MLLDPE-SP 0540. After the polyethylene materials with the types are added according to the proportion, the obtained outer layer has higher strength and puncture resistance, and the comprehensive use performance of the film can be further improved, so that the film is more suitable for being applied in a standing type packaging bag. More preferably, the first linear low density polyethylene is LLDPE-7042, the first low density polyethylene is LDPE-2420H, and the first metallocene linear low density polyethylene is MLLDPE-SP 1520.
In the low temperature drop resistant film provided by the invention, the second linear low density polyethylene, the second low density polyethylene and the second metallocene linear low density polyethylene used in the middle layer can be made of the types of materials commonly used in the field. In a preferred embodiment, the second linear low density polyethylene in the intermediate layer is selected from one or more of LLDPE-2045, LLDPE-7042 and 201 XV; the second low density polyethylene is selected from LDPE-2426H and/or 2426D; the second metallocene linear low density polyethylene is selected from MLLDPE-SP0510 and/or MLLDPE-SP 0540. After the polyethylene materials with the types are added according to the proportion, the obtained middle layer has more excellent strength and better cohesiveness with the inner layer and the outer layer. More preferably, the second linear low density polyethylene is LLDPE-2045, the second low density polyethylene is LDPE-2426H, and the second metallocene linear low density polyethylene is MLLDPE-SP 0510.
In the low temperature drop resistant film provided by the invention, the dosage relationship among three layers can be selected by a person skilled in the art. In a preferred embodiment, in the low temperature drop resistant film, the weight percentage of the outer layer is 20 to 30%, the weight percentage of the middle layer is 40 to 60%, and the weight percentage of the inner layer is 20 to 30%. The dosage relation of the three layers is controlled within the range, which is beneficial to integrating various properties of the film and ensuring that the film has better service performance. Preferably, in the low-temperature drop resistant film, the thickness ratio of the outer layer, the middle layer and the inner layer is 1: 1-2. Likewise, controlling the thickness ratio of each layer within the above ranges is beneficial to further enhance the overall performance of the film, making it more suitable for use in stand-up pouches. More preferably, the thickness ratio of the outer layer, the intermediate layer and the inner layer is 1:2: 1.
In the low-temperature drop resistant film provided by the invention, the color master used in the intermediate layer can be a color master commonly used in the field. Preferably, the color concentrates include, but are not limited to, white color concentrate 58890.
In the low temperature drop resistant film provided by the invention, the opening agent and the slipping agent can be prepared from materials which are commonly used in the field. In a preferred embodiment, the opening agent includes, but is not limited to, opening agent EAZ-10 and the slip agent includes, but is not limited to, slip agent ESQ-4.
In addition, the invention also provides a preparation method of the low-temperature drop resistant film, which comprises the following steps: the raw materials of the outer layer, the middle layer and the inner layer are co-extruded and blow molded. Specifically, the preparation process comprises the following steps:
step one, mixing materials, namely respectively stirring the raw materials of the outer layer, the middle layer and the inner layer into mixed materials for later use according to the dosage proportion of the raw materials of each layer;
step two, batching, namely batching the mixture of the outer layer, the middle layer and the inner layer according to the weight percentage between the layers;
and step three, co-extruding and blowing the film, and performing blow molding by using a film blowing machine to obtain the low-temperature drop resistant film.
The preparation process comprises a material mixing process, a feeding process, a plasticizing extrusion process, a blowing traction process, an air ring cooling process, a herringbone clamping plate process, a traction roller traction process, a corona treatment process and a film winding process. The skilled person can select specific process parameters in each process, and details are not repeated herein.
According to another aspect of the invention, there is also provided a use of the above low temperature drop resistant film in a stand-up type packaging bag.
The low-temperature-resistant falling film provided by the invention is applied to a standing type packaging bag, so that the low-temperature toughness of the packaging bag can be obviously improved, and meanwhile, the packaging bag has higher strength and puncture resistance. In addition, the low-temperature drop-resistant film provided by the invention also has the advantages of low production cost and good corrosion resistance, and can be widely applied to liquid detergent standing type packaging bags.
The present invention is described in further detail below with reference to specific examples, which are not to be construed as limiting the scope of the invention as claimed.
Example 1
(1) Preparing materials:
the outer layer comprises the following raw materials in percentage by weight: 60% of LLDPE-7042; 20% LDPE-2420H; and 20% MLLDPE-SP 1520;
the intermediate layer comprises the following raw materials in percentage by weight: 20% of LLDPE-2045; 20% LDPE-2426H; and 40% MLLDPE-SP 0510; 20% of white master batch 58890;
the inner layer comprises the following raw materials in percentage by weight: 72% of MLLDPE-SP 2020; 24% of MLLDPE-SP 0510; 2% of an opening agent EAZ-10; and 2% of a slipping agent ESQ-4;
wherein, the raw material for the outer layer, the raw material for the middle layer and the raw material for the inner layer respectively account for 25 percent, 50 percent and 25 percent of the total mass of the raw materials.
(2) Blow molding:
the materials with the mixture ratio are processed in multilayer co-extrusion blow molding equipment, and the method comprises the following steps: the production process comprises the steps of material mixing, feeding, plasticizing extrusion, inflation traction, air ring cooling, herringbone clamping plate, traction roller traction, corona treatment and film winding. The low temperature drop resistant film is obtained, the total thickness of the film is 130 mu m, and the thickness ratio of the outer layer, the middle layer and the inner layer is 1:2: 1.
(3) Preparing a standing type packaging bag:
and (3) performing dry compounding on the low-temperature-resistant falling film prepared in the step (2) and a polyester film, and preparing the stand-type packaging bag.
Example 2
(1) Preparing materials:
the outer layer comprises the following raw materials in percentage by weight: 50% of 201 XV; 25% LDPE-2420D; and 25% MLLDPE-SP 0510;
the intermediate layer comprises the following raw materials in percentage by weight: 25% of LLDPE-7042; 15% LDPE-2426D; and 45% MLLDPE-SP 0540; 15% of white master batch 58890;
the inner layer comprises the following raw materials in percentage by weight: 96% of MLLDPE-SP 0510; 2% of an opening agent EAZ-10; and 2% of a slipping agent ESQ-4;
wherein, the raw materials for the outer layer, the middle layer and the inner layer respectively account for 25 percent, 50 percent and 25 percent of the total mass of the raw materials.
(2) Blow molding:
the materials with the mixture ratio are processed in multilayer co-extrusion blow molding equipment, and the method comprises the following steps: the production process comprises the steps of material mixing, feeding, plasticizing extrusion, inflation traction, air ring cooling, herringbone clamping plate, traction roller traction, corona treatment and film winding. The low temperature drop resistant film is obtained, the total thickness of the film is 130 mu m, and the thickness ratio of the outer layer, the middle layer and the inner layer is 1:2: 1.
(3) Preparing a standing type packaging bag:
and (3) performing dry compounding on the low-temperature-resistant falling film prepared in the step (2) and a polyester film, and preparing the stand-type packaging bag.
Example 3
(1) Preparing materials:
the outer layer comprises the following raw materials in percentage by weight: 70% LLDPE-7042; 15% LDPE-2420H; and 15% MLLDPE-SP 0540;
the intermediate layer comprises the following raw materials in percentage by weight: 20% of 201 XV; 25% LDPE-2426H; and 30% MLLDPE-SP 0510; 25% of white master batch 58890;
the inner layer comprises the following raw materials in percentage by weight: 65% of MLLDPE-SP 2020; 33% of MLLDPE-SP 0510; 1% of an opening agent EAZ-10; and 1% of slipping agent ESQ-4;
wherein, the raw material for the outer layer, the raw material for the middle layer and the raw material for the inner layer respectively account for 20 percent, 60 percent and 20 percent of the total mass of the raw materials.
(2) Blow molding:
the materials with the mixture ratio are processed in multilayer co-extrusion blow molding equipment, and the method comprises the following steps: the production process comprises the steps of material mixing, feeding, plasticizing extrusion, inflation traction, air ring cooling, herringbone clamping plate, traction roller traction, corona treatment and film winding. The low temperature drop resistant film is obtained, the total thickness of the film is 130 mu m, and the thickness ratio of the outer layer, the middle layer and the inner layer is 1:3: 1.
(3) Preparing a standing type packaging bag:
and (3) performing dry compounding on the low-temperature-resistant falling film prepared in the step (2) and a polyester film, and preparing the stand-type packaging bag.
Example 4
(1) Preparing materials:
the outer layer comprises the following raw materials in percentage by weight: 60% of LLDPE-7042; 20% LDPE-2420H; and 20% MLLDPE-SP 1520;
the intermediate layer comprises the following raw materials in percentage by weight: 15% of LLDPE-2045; 20% LDPE-2426H; and 50% MLLDPE-SP 0510; 15% of white master batch 58890;
the inner layer comprises the following raw materials in percentage by weight: 70% of MLLDPE-SP 2020; 25% of MLLDPE-SP 0510; 2.5 percent of an opening agent EAZ-10; and 2.5% of a slipping agent ESQ-4;
wherein, the raw material for the outer layer, the raw material for the middle layer and the raw material for the inner layer respectively account for 30 percent, 40 percent and 30 percent of the total mass of the raw materials.
(2) Blow molding:
the materials with the mixture ratio are processed in multilayer co-extrusion blow molding equipment, and the method comprises the following steps: the production process comprises the steps of material mixing, feeding, plasticizing extrusion, inflation traction, air ring cooling, herringbone clamping plate, traction roller traction, corona treatment and film winding. The low temperature drop resistant film is obtained, the total thickness of the film is 130 mu m, and the thickness ratio of the outer layer, the middle layer and the inner layer is 1:1.33: 1.
(3) Preparing a standing type packaging bag:
and (3) performing dry compounding on the low-temperature-resistant falling film prepared in the step (2) and a polyester film, and preparing the stand-type packaging bag.
Example 5
(1) Preparing materials:
the outer layer comprises the following raw materials in percentage by weight: 60% of LLDPE-7042; 20% LDPE-2420H; and 20% MLLDPE-SP 1520;
the intermediate layer comprises the following raw materials in percentage by weight: 15% of LLDPE-2045; 20% LDPE-2426H; and 50% MLLDPE-SP 0510; 15% of white master batch 58890;
the inner layer comprises the following raw materials in percentage by weight: 85% of MLLDPE-SP 2020; 13% of MLLDPE-SP 0510; 1% of an opening agent EAZ-10; and 1% of slipping agent ESQ-4;
wherein, the raw material for the outer layer, the raw material for the middle layer and the raw material for the inner layer respectively account for 25 percent, 50 percent and 25 percent of the total mass of the raw materials.
(2) Blow molding:
the materials with the mixture ratio are processed in multilayer co-extrusion blow molding equipment, and the method comprises the following steps: the production process comprises the steps of material mixing, feeding, plasticizing extrusion, inflation traction, air ring cooling, herringbone clamping plate, traction roller traction, corona treatment and film winding. The low temperature drop resistant film is obtained, the total thickness of the film is 130 mu m, and the thickness ratio of the outer layer, the middle layer and the inner layer is 1:2: 1.
(3) Preparing a standing type packaging bag:
and (3) performing dry compounding on the low-temperature-resistant falling film prepared in the step (2) and a polyester film, and preparing the stand-type packaging bag.
Comparative example 1
(1) Preparing materials:
the outer layer comprises the following raw materials in percentage by weight: 40% LLDPE-7042; 30% LDPE-2420H; and 30% MLLDPE-SP 1520;
the intermediate layer comprises the following raw materials in percentage by weight: 30% of LLDPE-2045; 10% LDPE-2426H; and 55% of MLLDPE-SP 0510; 5% of white master batch 58890;
the inner layer comprises the following raw materials in percentage by weight: 90% of MLLDPE-SP 0510; 5% of an opening agent EAZ-10; and 5% of slipping agent ESQ-4;
wherein, the raw material for the outer layer, the raw material for the middle layer and the raw material for the inner layer respectively account for 25 percent, 50 percent and 25 percent of the total mass of the raw materials.
(2) Blow molding:
the materials with the mixture ratio are processed in multilayer co-extrusion blow molding equipment, and the method comprises the following steps: the production process comprises the steps of material mixing, feeding, plasticizing extrusion, inflation traction, air ring cooling, herringbone clamping plate, traction roller traction, corona treatment and film winding. The low temperature drop resistant film is obtained, the total thickness of the film is 130 mu m, and the thickness ratio of the outer layer, the middle layer and the inner layer is 1:2: 1.
(3) Preparing a standing type packaging bag:
and (3) performing dry compounding on the low-temperature-resistant falling film prepared in the step (2) and a polyester film, and preparing the stand-type packaging bag.
The low temperature drop resistant films and the stand-up type packaging bags prepared in examples 1 to 5 and comparative example 1 were subjected to characterization test.
The characterization method comprises the following steps:
(1) tensile strength of the film: measuring the transverse tensile strength and the longitudinal tensile strength of the low temperature drop resistant films prepared in examples 1 to 5 and comparative example 1 by using an electronic tensile tester;
(2) the low temperature drop resistance of the standing type packaging bag is as follows: the stand-up packaging bags prepared in examples 1 to 5 and comparative example 1 were filled with 500ml of laundry detergent, sealed and then frozen at-18 ℃ for 24 hours. And taking out and placing for 1h, then performing a drop test, and inspecting the bag breaking rate after the bag falls, wherein the drop operation is 1.5m in height, and the vertical drop, the horizontal drop and the lateral drop are performed 3 times respectively.
The measurement results are shown in table 1:
TABLE 1
From the above data, it can be seen that the above embodiments of the present invention achieve the following technical effects:
after the film prepared in the embodiment of the invention is subjected to dry compounding, the film has high tensile strength and excellent freezing and falling resistance. In addition, the film provided by the invention has simple production process, and only needs to be combined with batching equipment to realize continuous production through a film blowing machine. More particularly, the raw material components of the above examples 1, 4 and 5 are used in specific types and amounts, and the obtained film has more excellent low temperature drop resistance.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A low-temperature drop-resistant film is characterized by sequentially comprising an outer layer, a middle layer and an inner layer; wherein,
the raw materials for forming the outer layer comprise the following components in percentage by weight: 50-70% of a first linear low density polyethylene, 15-25% of a first low density polyethylene and 15-25% of a first metallocene linear low density polyethylene;
the raw materials for forming the intermediate layer comprise the following components in percentage by weight: 15-25% of second linear low density polyethylene, 15-25% of second low density polyethylene, 30-50% of second metallocene linear low density polyethylene and 15-25% of color master batch;
the raw materials for forming the inner layer comprise the following components in percentage by weight: 95-98% of third metallocene linear low density polyethylene, 1-2.5% of an opening agent and 1-2.5% of a slipping agent.
2. The low temperature drop resistant film of claim 1, wherein in the inner layer, the third metallocene linear low density polyethylene is selected from one or more of MLLDPE-SP2020, MLLDPE-SP0510 and MLLDPE-SP 0540.
3. The low temperature drop resistant film of claim 2, wherein the raw materials forming the inner layer comprise, in weight percent: 70-85% of MLLDPE-SP2020, 13-25% of MLLDPE-SP0510, 1-2.5% of a mouth-opening agent and 1-2.5% of a slipping agent.
4. A low temperature drop resistant film according to any of claims 1 to 3, wherein in the outer layer the first linear low density polyethylene is selected from LLDPE-7042 and/or 201 XV; the first low density polyethylene is selected from LDPE-2420H and/or LDPE-2420D; the first metallocene linear low density polyethylene is selected from one or more of MLLDPE-SP1520, MLLDPE-SP0510 and MLLDPE-SP 0540.
5. The low temperature drop resistant film of claim 4, wherein in the intermediate layer, the second linear low density polyethylene is selected from one or more of LLDPE-2045, LLDPE-7042 and 201 XV; the second low density polyethylene is selected from LDPE-2426H and/or LDPE-2426D; the second metallocene linear low density polyethylene is selected from MLLDPE-SP0510 and/or MLLDPE-SP 0540.
6. The low-temperature drop resistant film according to claim 1, wherein the weight percentage of the outer layer is 20-30%, the weight percentage of the middle layer is 40-60%, and the weight percentage of the inner layer is 20-30%.
7. The low-temperature drop resistant film according to claim 6, wherein the thickness ratio of the outer layer, the middle layer and the inner layer in the low-temperature drop resistant film is 1: 1-2.
8. The low temperature drop resistant film of claim 1, wherein the color concentrate is selected from the group consisting of white concentrate 58890.
9. The low temperature drop resistant film of claim 1, wherein the opening agent is selected from the group consisting of opening agent EAZ-10 and the slip agent is selected from the group consisting of slip agent ESQ-4.
10. Use of a low temperature drop resistant film according to any one of claims 1 to 9 in a stand-up packaging bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410768811.6A CN104512080B (en) | 2014-12-12 | 2014-12-12 | Low temperature resistant fall film and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410768811.6A CN104512080B (en) | 2014-12-12 | 2014-12-12 | Low temperature resistant fall film and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104512080A CN104512080A (en) | 2015-04-15 |
| CN104512080B true CN104512080B (en) | 2016-09-07 |
Family
ID=52788220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410768811.6A Active CN104512080B (en) | 2014-12-12 | 2014-12-12 | Low temperature resistant fall film and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104512080B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105172299B (en) * | 2015-09-24 | 2017-12-22 | 重庆松尚久德新材料有限公司 | Boiling film production method |
| CN106243707B (en) * | 2016-07-29 | 2018-08-21 | 诚德科技股份有限公司 | The solvent-free compound PA/PA/PE flexible packing materials of one kind and its preparation process and application |
| CN106867081A (en) * | 2017-03-30 | 2017-06-20 | 昆山金盟塑料薄膜有限公司 | A kind of liquid packaging film and preparation method thereof |
| CN107323053B (en) * | 2017-06-30 | 2018-11-13 | 黄山永新股份有限公司 | A kind of tear-resistant polyethylene film, composite membrane and preparation method thereof |
| CN108394156B (en) * | 2018-02-15 | 2021-03-23 | 东莞市富默克化工有限公司 | Liquid chemical packaging film and preparation method and application thereof |
| CN109177398A (en) * | 2018-09-11 | 2019-01-11 | 上海福助工业有限公司 | Three layers of Coloured film with delustring sense |
| CN111070838A (en) * | 2019-12-31 | 2020-04-28 | 诚德科技股份有限公司 | Recyclable multilayer PE composite film and preparation method thereof |
| CN111532011A (en) * | 2020-04-11 | 2020-08-14 | 上海紫泉标签有限公司 | Puncture-resistant high-strength film and preparation method thereof |
| CN117283955A (en) * | 2023-10-26 | 2023-12-26 | 四川省新都永志印务有限公司 | PE film for low-temperature anti-breaking flexible package inner layer and preparation method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101480861B (en) * | 2009-01-23 | 2011-03-16 | 石狮市新光塑料包装有限公司 | Novel PE film |
| CN101531264A (en) * | 2009-04-20 | 2009-09-16 | 黄山永新股份有限公司 | Milk powder packing bag and preparing method thereof |
| CN102001207A (en) * | 2010-08-30 | 2011-04-06 | 天津精华石化有限公司 | Novel FFS heavy packaging film |
| CN102179985B (en) * | 2011-03-18 | 2014-04-30 | 黄山永新股份有限公司 | Polyethylene (PE) film and preparation method thereof |
-
2014
- 2014-12-12 CN CN201410768811.6A patent/CN104512080B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104512080A (en) | 2015-04-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104512080B (en) | Low temperature resistant fall film and application thereof | |
| CN104691071B (en) | A kind of packaging film of puncture-resistant and preparation method thereof | |
| TWI508844B (en) | Biaxially-oriented nylon film, laminated packing material and manufacturing method for biaxially-oriented nylon film | |
| CN103879112B (en) | Plastic compound flexible packaging polyethylene film and blow moiding method thereof | |
| CN107746499A (en) | A kind of biaxial tension ventilated membrane and preparation method thereof | |
| CN102991074A (en) | Thin film and production method thereof | |
| CN109648899B (en) | Special film for packing polyethylene flour bags | |
| WO2005118262A1 (en) | Polyamide resin film roll, and production method therefor | |
| CN108359170A (en) | A kind of multi-layer co-extruded polyethylene film and preparation method thereof | |
| WO2006112090A1 (en) | Film roll of polyamide-based blend resin and process for producing the same | |
| CN101723132B (en) | Release BOPP thin film and preparation method thereof | |
| CN104354415B (en) | A kind of puncture-resistant oil resistivity heat-sealing compound counterdie and preparation method thereof | |
| CN201769424U (en) | Release BOPP thin film | |
| CN103009761B (en) | Polyolefin heat-shrinkable film with high shrinking percentage and manufacturing method thereof | |
| KR20080022113A (en) | Polyamide mixed resin laminated film roll and process for producing the same | |
| CN102152584B (en) | Nano fluorescent invisible anti-counterfeit polyester film with high permeability and preparation method thereof | |
| CN103481621B (en) | A kind of low-temperature polyethylene shrink film and film-blowing process thereof | |
| CN103568425B (en) | Stretch hood film with weight capacity and preparation method thereof | |
| CN103665662A (en) | Heat-shrinkable PVC film and making method thereof | |
| CN100506660C (en) | Polyamide resin film roll, and production method thereof | |
| CN106550800B (en) | Polyolefin greenhouse film and preparation method thereof | |
| CN103881228B (en) | The CPE decorative pattern barrier film of glass sandwich PVB film and production method thereof | |
| CN112172290B (en) | Film, production method thereof, packaging bag containing film and application of packaging bag | |
| CN109679194A (en) | Puncture-resistant polyethylene composition and its film | |
| CN109094162B (en) | High-strength cold-stretched film and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 325000, No. 1983-2033, seaport Road, Longgang Town, Cangnan County, Zhejiang, Wenzhou Applicant after: CHENGDE TECHNOLOGY Co.,Ltd. Address before: Lake Road Longgang Cangnan County town of Wenzhou City, Zhejiang province 325000 (Jintian Industrial Zone West) Applicant before: Zhejiang Prudential packaging Polytron Technologies Inc. Address after: Lake Road Longgang Cangnan County town of Wenzhou City, Zhejiang province 325000 (Jintian Industrial Zone West) Applicant after: Zhejiang Prudential packaging Polytron Technologies Inc. Address before: Lake Road Longgang Cangnan County town of Wenzhou City, Zhejiang Province, No. 88 325000 Applicant before: ZHEJIANG CHENGDE PACKAGING Co.,Ltd. |
|
| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 325000 Century Avenue 888-1088, Longgang Town, Cangnan County, Wenzhou City, Zhejiang Province Patentee after: CHENGDE TECHNOLOGY Co.,Ltd. Address before: 325000 Haigang Road, Longgang Town, Cangnan County, Wenzhou City, Zhejiang Province, 1983-2033 Patentee before: CHENGDE TECHNOLOGY Co.,Ltd. |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Low temperature drop resistant film and its application Effective date of registration: 20210929 Granted publication date: 20160907 Pledgee: China Minsheng Banking Corp Wenzhou branch Pledgor: CHENGDE TECHNOLOGY Co.,Ltd. Registration number: Y2021980010043 |