CN111231462A - Easy-to-open transparent polyethylene blown film with thickness of less than 45 micrometers and preparation method thereof - Google Patents
Easy-to-open transparent polyethylene blown film with thickness of less than 45 micrometers and preparation method thereof Download PDFInfo
- Publication number
- CN111231462A CN111231462A CN201910223925.5A CN201910223925A CN111231462A CN 111231462 A CN111231462 A CN 111231462A CN 201910223925 A CN201910223925 A CN 201910223925A CN 111231462 A CN111231462 A CN 111231462A
- Authority
- CN
- China
- Prior art keywords
- microns
- polyethylene
- density polyethylene
- opening
- easy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 88
- -1 polyethylene Polymers 0.000 title claims abstract description 87
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 87
- 238000002360 preparation method Methods 0.000 title abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 124
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 62
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 57
- 239000012793 heat-sealing layer Substances 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 238000010096 film blowing Methods 0.000 claims abstract description 11
- 239000010410 layer Substances 0.000 claims description 65
- 229920001684 low density polyethylene Polymers 0.000 claims description 53
- 239000004702 low-density polyethylene Substances 0.000 claims description 53
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 52
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 52
- 239000002994 raw material Substances 0.000 claims description 39
- 239000002245 particle Substances 0.000 claims description 32
- 239000000203 mixture Substances 0.000 claims description 22
- 239000002356 single layer Substances 0.000 claims description 4
- 238000000071 blow moulding Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 14
- 238000002834 transmittance Methods 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 5
- 239000005022 packaging material Substances 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 description 10
- 238000001125 extrusion Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 6
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 6
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 229920006257 Heat-shrinkable film Polymers 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 239000000758 substrate Substances 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
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
-
- 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
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
-
- 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
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- 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
- B32B2439/02—Open containers
Abstract
The invention relates to the technical field of packaging materials and preparation thereof, in particular to an easy-opening transparent polyethylene blown film with the thickness of below 45 micrometers and a preparation method thereof. The easy-opening transparent polyethylene blown film with the thickness of less than 45 micrometers comprises a heat sealing layer, wherein the heat sealing layer is a polyethylene film containing an opening agent, the opening agent is silicon dioxide, and the addition concentration of the silicon dioxide is 1300-3300 ppm. The method for preparing the transparent polyethylene blown film with the easy opening of less than 45 microns comprises the step of preparing the transparent polyethylene blown film with the easy opening of less than 45 microns through a film blowing machine. The invention solves the problem of poor opening property of the polyethylene blown film material with the thickness of below 45 microns after being compounded with other base materials in the prior art. The easy-opening transparent polyethylene blow-molded film with the thickness of less than 45 microns has good tensile property, light transmittance and heat-sealing strength, and has the advantages of good bag opening performance, high transparency and no need of reworking after bag opening when being compounded and used as a heat-sealing layer for bag making.
Description
Technical Field
The invention relates to the technical field of packaging materials and preparation thereof, in particular to an easy-opening transparent polyethylene blown film with the thickness of below 45 micrometers and a preparation method thereof.
Background
The technological process of polyethylene blown film includes plasticizing and extruding material to form blown pipe; cooling, drawing and coiling. In the blown film forming process, according to different extrusion and drawing directions, the method can be divided into three types of flat blowing, upward blowing and downward blowing, and the main forming process also has a special blow molding method, such as an upward extrusion blowing method.
The flat extrusion up-blowing method is characterized by that it uses right-angle machine head, i.e. the discharge direction of machine head is perpendicular to extruder, and the extruded tube is upwards drawn to a certain distance, and then is clamped by herringbone plate, and the extruded tube is blown into foamed tube by the compressed air introduced from bottom portion, and its transverse size is controlled by the quantity of compressed air, and its longitudinal size is controlled by drawing speed, and the foamed tube can be cooled and formed so as to obtain the blown film. The main plastic varieties suitable for the up-blowing method are PVC, PE, PS and HDPE. The flat extrusion blow-down method is called flat extrusion blow-down method, and is especially suitable for raw material with low viscosity and plastic film with high transparency. Such as PP, PA, PVDC (vinylidene chloride). The flat extrusion and flat blowing method is a process that a flat machine head concentric with a screw rod of an extruder is used, a bubble tube and the central line of the machine head are positioned on the same horizontal plane, and the process is called as the flat extrusion and flat blowing method, is only suitable for blowing products with small-caliber films, such as LDPE, PVC and PS films, and is also suitable for blowing the production of heat shrinkable films.
When the thickness of the polyethylene blown film material is below 45 microns and is compounded with other base materials, the requirement of easy opening of a composite film bag is difficult to solve by the conventional polyethylene blown film formula.
Due to the high hygienic requirements of the end consumer market for finished bag making products, some customers do not agree to improve opening performance by applying powder prior to bag making. In addition, some product customers require packaging garments, and the bags do not have significant powder inside to prevent the surfaces of the garments in the bags from soiling, which can affect the consumer's interest in purchasing.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention provides an easy-open transparent polyethylene blown film with a thickness of 45 micrometers or less, which is used to solve the problem of poor opening performance existing after the polyethylene blown film material with a thickness of 45 micrometers or less is compounded with other substrates in the prior art, and also provides a method for preparing the easy-open transparent polyethylene blown film with a thickness of 45 micrometers or less, wherein the easy-open transparent polyethylene blown film with a thickness of 45 micrometers or less has good tensile property, light transmittance and heat-seal strength, and the easy-open transparent polyethylene blown film with a thickness of 45 micrometers or less has the advantages of good bag opening performance, high transparency and no need of rework after opening bags when compounded with other materials.
In order to attain the above and other related objects,
the invention provides a 45-micron or less easy-opening transparent polyethylene blown film, which comprises a heat sealing layer, wherein the heat sealing layer is a polyethylene film containing an opening agent, the opening agent is silicon dioxide, the addition concentration of the silicon dioxide is 1300-3300 ppm, and the concentration of the silicon dioxide opening agent is based on the total extrusion processing weight.
By adding the opening agent into the heat seal layer, after the easily-opened transparent polyethylene blown film with the opening size of less than 45 micrometers is compounded with other base materials, the opening performance is good; when the silicon dioxide with different grain diameters is selected as the opening agent, the opening agent has opening performance which can be maintained at the level of easy opening and no need of rework by adopting different adding concentrations.
In an embodiment of the present invention, the polyethylene raw material of the heat-sealing layer is a mixture of low-density polyethylene and linear low-density polyethylene, and the weight ratio of the low-density polyethylene to the linear low-density polyethylene is (65-75): (25-35). Wherein the raw material grades of the linear low-density polyethylene are SP1520, POE1881.G and 2038.68G, and the raw material grades of the low-density polyethylene are Q281 and 165BW 1.
In an embodiment of the invention, the easy-opening transparent polyethylene blown film with a thickness of less than 45 micrometers further includes a corona layer and an intermediate layer, and the intermediate layer is disposed between the corona layer and the heat-sealing layer.
In an embodiment of the invention, the polyethylene raw material of the corona layer is a mixture of low density polyethylene and linear low density polyethylene, and the weight ratio of the low density polyethylene to the linear low density polyethylene is (65-75): (25-35); the polyethylene raw material of the middle layer is a mixture of low-density polyethylene and linear low-density polyethylene, and the weight ratio of the low-density polyethylene to the linear low-density polyethylene is (65-75): (25-35); the polyethylene raw material of the heat sealing layer is a mixture of low-density polyethylene and linear low-density polyethylene, and the weight ratio of the low-density polyethylene to the linear low-density polyethylene is (65-75): (25-35). Wherein the raw material grades of the linear low-density polyethylene are SP1520, POE1881.G and 2038.68G, and the raw material grades of the low-density polyethylene are Q281 and 165BW 1.
In one embodiment of the present invention, the thickness of the corona layer is 4.5 to 5.0 μm; the thickness of the intermediate layer is less than 35 microns; the thickness of the heat sealing layer is 4.5-5.0 microns.
In an embodiment of the present invention, in the silicon dioxide used in the heat-sealing layer, the content of silicon dioxide with a particle size of 5 microns is 70% to 90%, and the content of silicon dioxide with a particle size of 7 microns is 30% to 10%.
In an embodiment of the present invention, the concentration of the silicon dioxide with a particle size of 5 μm is 1000 to 2500 ppm; the silicon dioxide with the particle size of 7 microns is added in a concentration of 300-800ppm, and the concentration of the silicon dioxide opening agent is based on the total extrusion processing weight.
In an embodiment of the present invention, the silica content of the silica with a particle size of 7 μm is 30-10%, the silica addition concentration is 300-800ppm, and the silica opening agent concentration is based on the total extrusion processing weight.
A method for preparing the easy-opening transparent polyethylene blown film with the diameter of below 45 microns comprises the following steps: the transparent polyethylene blow-molded film with the easy opening of less than 45 micrometers is prepared through a film blowing machine.
In an embodiment of the present invention, the die head of the film blowing machine is a single layer, three layers or more than three layers.
As mentioned above, the easy-opening transparent polyethylene blown film with the thickness of 45 microns or less and the preparation method have the following beneficial effects: by adding the opening agent into the heat seal layer, after the easily-opened transparent polyethylene blown film with the opening size of less than 45 micrometers is compounded with other base materials, the opening performance is good; when the silicon dioxide with different grain diameters is selected as the opening agent, the opening agent has opening performance which can be maintained at the degree of easy opening and no need of rework by adopting different adding concentrations; the easy-opening transparent polyethylene blown film with the thickness of less than 45 micrometers prepared by the invention has the advantages of longitudinal tensile strength of 18-45Mpa, transverse tensile strength of 15-40Mpa, longitudinal elongation at break of 550-850%, transverse elongation at break of 600-900%, light transmittance of 93-97%, heat sealing strength of 13-18 (N/15mm), and excellent tensile property, light transmittance and heat sealing strength.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Example 1
The transparent polyethylene blown film with the opening degree of below 45 microns comprises a heat sealing layer, wherein the heat sealing layer is a polyethylene film containing an opening agent, and the opening agent is silicon dioxide; the polyethylene raw material of the heat sealing layer is a mixture of low-density polyethylene and linear low-density polyethylene, and the weight ratio of the low-density polyethylene to the linear low-density polyethylene is 65: 35, wherein the linear low density polyethylene has a raw material grade of SP1520 and the low density polyethylene has a raw material grade of Q281;
the content of the silicon dioxide with the particle size of 5 microns in the silicon dioxide is 90%, and the content of the silicon dioxide with the particle size of 7 microns in the silicon dioxide is 10%. The addition concentration of silicon dioxide with the particle size of 5 microns is 1000 ppm; the silica having a particle size of 7 μm was added at a concentration of 300 ppm. The method for preparing the easy-opening transparent polyethylene blown film with the diameter of below 45 microns comprises the following steps: the transparent polyethylene blown film with the easy opening of below 45 micrometers is prepared by a film blowing machine with a single-layer die head.
Example 2
The transparent polyethylene blown film with the opening degree of below 45 microns comprises a heat sealing layer, wherein the heat sealing layer is a polyethylene film containing an opening agent, and the opening agent is silicon dioxide; the polyethylene raw material of the heat sealing layer is a mixture of low-density polyethylene and linear low-density polyethylene, and the weight ratio of the low-density polyethylene to the linear low-density polyethylene is 75: 25, wherein the linear low density polyethylene has a raw material designation of poe1881.g and the low density polyethylene has a raw material designation of 165BW 1;
the content of silicon dioxide with the particle size of 7 microns in the silicon dioxide is 10%, the content of silicon dioxide with the particle size of 5 microns in the silicon dioxide is 90%, the adding concentration of the silicon dioxide with the particle size of 5 microns is 1500ppm, and the adding concentration of the silicon dioxide with the particle size of 7 microns is 500 ppm. .
The method for preparing the easy-opening transparent polyethylene blown film with the diameter of below 45 microns comprises the following steps: the transparent polyethylene blown film with the easy opening of below 45 micrometers is prepared by a film blowing machine with a single-layer die head.
Example 3
The transparent polyethylene blown film with the easy opening being less than 45 micrometers comprises a heat sealing layer, a corona layer and an intermediate layer, wherein the intermediate layer is arranged between the corona layer and the heat sealing layer; the polyethylene raw material of the corona layer is a mixture of low-density polyethylene and linear low-density polyethylene, and the weight ratio of the low-density polyethylene to the linear low-density polyethylene is 70: 30, of a nitrogen-containing gas; the polyethylene raw material of the middle layer is a mixture of low density polyethylene and linear low density polyethylene, and the weight ratio of the low density polyethylene to the linear low density polyethylene is 70: 30, of a nitrogen-containing gas; the polyethylene raw material of the heat sealing layer is a mixture of low-density polyethylene and linear low-density polyethylene, and the weight ratio of the low-density polyethylene to the linear low-density polyethylene is 70: 30, of a nitrogen-containing gas; the thickness of the corona layer is 4.5 microns; the thickness of the intermediate layer is 30 microns; the thickness of the heat-seal layer was 4.5 microns. Wherein the raw material grade of the linear low-density polyethylene is 2038.68G, and the raw material grade of the low-density polyethylene is 165BW 1;
the content of silicon dioxide with the particle size of 5 microns in the silicon dioxide is 90%, and the content of silicon dioxide with the particle size of 7 microns in the silicon dioxide is 10%; the adding concentration of the silicon dioxide with the particle size of 5 microns is 2000ppm, and the adding concentration of the silicon dioxide with the particle size of 7 microns is 500 ppm.
The method for preparing the easy-opening transparent polyethylene blown film with the diameter of below 45 microns comprises the following steps: the transparent polyethylene blown film with the easy opening of below 45 micrometers is prepared by a film blowing machine with a three-layer die head.
Example 4
The transparent polyethylene blown film with the easy opening being less than 45 micrometers comprises a heat sealing layer, a corona layer and an intermediate layer, wherein the intermediate layer is arranged between the corona layer and the heat sealing layer; the polyethylene raw material of the corona layer is a mixture of low-density polyethylene and linear low-density polyethylene, and the weight ratio of the low-density polyethylene to the linear low-density polyethylene is 75: 25; the polyethylene raw material of the middle layer is a mixture of low density polyethylene and linear low density polyethylene, and the weight ratio of the low density polyethylene to the linear low density polyethylene is 75: 25; the polyethylene raw material of the heat sealing layer is a mixture of low-density polyethylene and linear low-density polyethylene, and the weight ratio of the low-density polyethylene to the linear low-density polyethylene is 75: 25; the thickness of the corona layer is 5.0 microns; the thickness of the intermediate layer is 30 microns; the thickness of the heat-seal layer was 5.0 microns. Wherein the raw material grade of the linear low-density polyethylene is SP1520, and the raw material grade of the low-density polyethylene is 165BW 1;
the content of the silicon dioxide with the particle size of 5 microns in the silicon dioxide is 90%, and the adding concentration of the silicon dioxide with the particle size of 5 microns is 2500 ppm.
The content of the silicon dioxide with the particle size of 7 microns in the silicon dioxide is 10%, and the adding concentration of the silicon dioxide with the particle size of 7 microns is 800 ppm.
The method for preparing the easy-opening transparent polyethylene blown film with the diameter of below 45 microns comprises the following steps: the transparent polyethylene blown film with the easy opening of below 45 micrometers is prepared by a film blowing machine with a three-layer die head.
Example 5
The transparent polyethylene blown film with the easy opening being less than 45 micrometers comprises a heat sealing layer, a corona layer and an intermediate layer, wherein the intermediate layer is arranged between the corona layer and the heat sealing layer; the polyethylene raw material of the corona layer is a mixture of low density polyethylene and linear low density polyethylene, and the weight ratio of the low density polyethylene to the linear low density polyethylene is 70: 25; the polyethylene raw material of the middle layer is a mixture of low density polyethylene and linear low density polyethylene, and the weight ratio of the low density polyethylene to the linear low density polyethylene is 70: 25; the polyethylene raw material of the heat sealing layer is a mixture of low-density polyethylene and linear low-density polyethylene, and the weight ratio of the low-density polyethylene to the linear low-density polyethylene is 70: 25; the thickness of the corona layer is 5.0 microns; the thickness of the intermediate layer is 25 microns; the thickness of the heat-seal layer was 5.0 microns. Wherein the raw material of the linear low-density polyethylene is 2038.68G, and the raw material of the low-density polyethylene is Q281;
the content of the silicon dioxide with the particle size of 5 microns in the silicon dioxide is 80%, and the adding concentration of the silicon dioxide with the particle size of 5 microns is 1500 ppm. The content of the silicon dioxide with the particle size of 7 microns in the silicon dioxide is 20%, and the adding concentration of the silicon dioxide with the particle size of 7 microns is 500 ppm.
The method for preparing the easy-opening transparent polyethylene blown film with the diameter of below 45 microns comprises the following steps: the transparent polyethylene blown film with the easy opening of below 45 micrometers is prepared by a film blowing machine with a three-layer die head.
Example 6
The transparent polyethylene blown film with the easy opening being less than 45 micrometers comprises a heat sealing layer, a corona layer and an intermediate layer, wherein the intermediate layer is arranged between the corona layer and the heat sealing layer; the polyethylene raw material of the corona layer is a mixture of low density polyethylene and linear low density polyethylene, and the weight ratio of the low density polyethylene to the linear low density polyethylene is 70: 30, of a nitrogen-containing gas; the polyethylene raw material of the middle layer is a mixture of low density polyethylene and linear low density polyethylene, and the weight ratio of the low density polyethylene to the linear low density polyethylene is 70: 30, of a nitrogen-containing gas; the polyethylene raw material of the heat sealing layer is a mixture of low-density polyethylene and linear low-density polyethylene, and the weight ratio of the low-density polyethylene to the linear low-density polyethylene is 70: 30, of a nitrogen-containing gas; the thickness of the corona layer is 5.0 microns; the thickness of the intermediate layer is 30 microns; the thickness of the heat-seal layer was 5.0 microns. Wherein the raw material grade of the linear low-density polyethylene is 2038.68G, and the raw material grade of the low-density polyethylene is 165BW 1;
the content of the silicon dioxide with the particle size of 5 micrometers in the silicon dioxide is 70%, and the adding concentration of the silicon dioxide with the particle size of 5 micrometers is 1000 ppm. The content of silicon dioxide with the particle size of 7 microns in the silicon dioxide is 30%, and the adding concentration of the silicon dioxide is 800 ppm.
The method for preparing the easy-opening transparent polyethylene blown film with the diameter of below 45 microns comprises the following steps: the transparent polyethylene blown film with the easy opening of below 45 micrometers is prepared by a film blowing machine with a three-layer die head.
The basic physical property indexes of the finished products of the easy-opening transparent polyethylene blown films with the diameters of less than 45 micrometers prepared in the examples 1 to 6 are shown in the table 1:
table 1
Examples 1 to 6 the properties of the easy-open transparent polyethylene blown film of 45 μm or less obtained by compounding with other materials for making a heat-seal layer bag are shown in table 2, wherein the comparative example is a general blown polyethylene material which is generally used in the market and compounded with other materials for making a heat-seal layer bag:
table 2
In summary, the easy-opening transparent polyethylene blown film with the thickness of less than 45 microns is compounded with other materials to be used as a heat sealing layer for bag making, and the packaging bag is adopted as a small garment bag of Japan Youkasu company, the dosage is about 30 ten thousand per month, and the customer satisfaction is high. By adding the opening agent into the heat seal layer, after the easily-opened transparent polyethylene blown film with the opening size of less than 45 micrometers is compounded with other base materials, the opening performance is good, and bag opening rework is not needed in the subsequent use process; the easy-opening transparent polyethylene blown film with the thickness of less than 45 microns prepared by the invention has the advantages of longitudinal tensile strength of 18-45Mpa, transverse tensile strength of 15-40Mpa, longitudinal elongation at break of 550-750%, transverse elongation at break of 600-900%, light transmittance of 93-97%, heat sealing strength of 13-18 (N/15mm), and excellent tensile property, light transmittance and heat sealing strength. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. The easy-opening transparent polyethylene blown film with the thickness of less than 45 micrometers is characterized by comprising a heat sealing layer, wherein the heat sealing layer is a polyethylene film containing an opening agent, the opening agent is silicon dioxide, and the addition concentration of the silicon dioxide is 1300-3300 ppm.
2. The easy-open transparent polyethylene blown film of 45 microns or less according to claim 1, wherein: the polyethylene raw material of the heat sealing layer is a mixture of low-density polyethylene and linear low-density polyethylene, and the weight ratio of the low-density polyethylene to the linear low-density polyethylene is (65-75): (25-35).
3. The easy-open transparent polyethylene blown film of 45 microns or less according to claim 1, wherein: the transparent polyethylene blow molding film with the easy opening and the thickness below 45 micrometers further comprises a corona layer and a middle layer, wherein the middle layer is arranged between the corona layer and the heat sealing layer.
4. The easy-open transparent polyethylene blown film of 45 microns or less according to claim 3, wherein: the polyethylene raw material of the corona layer is a mixture of low-density polyethylene and linear low-density polyethylene, and the weight ratio of the low-density polyethylene to the linear low-density polyethylene is (65-75): (25-35); the polyethylene raw material of the middle layer is a mixture of low-density polyethylene and linear low-density polyethylene, and the weight ratio of the low-density polyethylene to the linear low-density polyethylene is (65-75): (25-35); the polyethylene raw material of the heat sealing layer is a mixture of low-density polyethylene and linear low-density polyethylene, and the weight ratio of the low-density polyethylene to the linear low-density polyethylene is (65-75): (25-35).
5. The easy-opening transparent polyethylene blown film with the thickness of 45 microns below according to the claim 3 or 4, which is characterized in that: the thickness of the corona layer is 4.5-5.0 microns; the thickness of the intermediate layer is less than 35 microns; the thickness of the heat sealing layer is 4.5-5.0 microns.
6. The easy-opening transparent polyethylene blown film with the thickness of 45 microns or less according to any one of claims 1 to 3, wherein: the silicon dioxide used in the heat sealing layer contains 70-90% of silicon dioxide with the particle size of 5 microns and 30-10% of silicon dioxide with the particle size of 7 microns.
7. The easy-opening transparent polyethylene blown film with the thickness of 45 microns below according to any one of the claim 6, wherein: the adding concentration of the silicon dioxide with the particle size of 5 microns is 1000-2500 ppm; the adding concentration of the silicon dioxide with the particle size of 7 microns is 300-800 ppm.
8. A method for preparing the transparent polyethylene blown film with the opening degree of 45 microns or less according to any one of claims 1 to 7, which is characterized by comprising the following steps: the transparent polyethylene blow-molded film with the easy opening of less than 45 micrometers is prepared through a film blowing machine.
9. The method for preparing the transparent polyethylene blown film with the easy opening of 45 microns below according to claim 8, is characterized in that: the die head of the film blowing machine is a single layer, three layers or more than three layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910223925.5A CN111231462A (en) | 2019-03-22 | 2019-03-22 | Easy-to-open transparent polyethylene blown film with thickness of less than 45 micrometers and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910223925.5A CN111231462A (en) | 2019-03-22 | 2019-03-22 | Easy-to-open transparent polyethylene blown film with thickness of less than 45 micrometers and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111231462A true CN111231462A (en) | 2020-06-05 |
Family
ID=70870243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910223925.5A Pending CN111231462A (en) | 2019-03-22 | 2019-03-22 | Easy-to-open transparent polyethylene blown film with thickness of less than 45 micrometers and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111231462A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114805975A (en) * | 2022-03-30 | 2022-07-29 | 联想(北京)有限公司 | Composition of blow molding film for packaging, preparation method of blow molding film and blow molding film |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265349A (en) * | 2008-04-10 | 2008-09-17 | 王锦江 | Inorganic anti-sticking master batch used for BOPP thin film and producing technique thereof |
| CN101927590A (en) * | 2010-02-26 | 2010-12-29 | 成都思雅科高分子材料有限公司 | Multilayer coextruded polyethylene film processed in down-blowing water-cooling ring film method |
| CN103171223A (en) * | 2013-03-11 | 2013-06-26 | 常州百佳薄膜科技有限公司 | Bidirectional-stretching online-coating optical base film and its making method |
| CN106313827A (en) * | 2015-07-01 | 2017-01-11 | 江苏裕兴薄膜科技股份有限公司 | Impact-resistant modified polyester film and preparation method thereof |
| CN109278389A (en) * | 2018-09-30 | 2019-01-29 | 安徽国风塑业股份有限公司 | One kind is exempted to be coated with Biaxially oriented polypropylene cold seal basement membrane and preparation method thereof |
-
2019
- 2019-03-22 CN CN201910223925.5A patent/CN111231462A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265349A (en) * | 2008-04-10 | 2008-09-17 | 王锦江 | Inorganic anti-sticking master batch used for BOPP thin film and producing technique thereof |
| CN101927590A (en) * | 2010-02-26 | 2010-12-29 | 成都思雅科高分子材料有限公司 | Multilayer coextruded polyethylene film processed in down-blowing water-cooling ring film method |
| CN103171223A (en) * | 2013-03-11 | 2013-06-26 | 常州百佳薄膜科技有限公司 | Bidirectional-stretching online-coating optical base film and its making method |
| CN106313827A (en) * | 2015-07-01 | 2017-01-11 | 江苏裕兴薄膜科技股份有限公司 | Impact-resistant modified polyester film and preparation method thereof |
| CN109278389A (en) * | 2018-09-30 | 2019-01-29 | 安徽国风塑业股份有限公司 | One kind is exempted to be coated with Biaxially oriented polypropylene cold seal basement membrane and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114805975A (en) * | 2022-03-30 | 2022-07-29 | 联想(北京)有限公司 | Composition of blow molding film for packaging, preparation method of blow molding film and blow molding film |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4399173A (en) | Multilayer films comprising low pressure, low density polyethylene | |
| CN104691071B (en) | A kind of packaging film of puncture-resistant and preparation method thereof | |
| US8637607B2 (en) | Polyethylene blends and films | |
| CN103009738B (en) | A kind of FFS bis-layers of co-extrusion multilayer packing membrane and preparation method thereof | |
| CA2557712A1 (en) | Machine-direction oriented multilayer films | |
| CN109648899B (en) | Special film for packing polyethylene flour bags | |
| CN108359170A (en) | A kind of multi-layer co-extruded polyethylene film and preparation method thereof | |
| CN103879112A (en) | Polyethylene film for plastic compound flexible package and blow molding method thereof | |
| CN110733218A (en) | polyethylene film with high puncture strength and preparation method thereof | |
| CN112644128B (en) | FFS heavy packaging film and preparation method thereof | |
| CN105922699A (en) | High-strength plastic thin film and preparation method thereof | |
| CN102673060A (en) | Highly-smooth polyethylene film and manufacturing method thereof | |
| CN110216960A (en) | A kind of bloom low haze PE heat shrink films and preparation method thereof | |
| CN103009761B (en) | Polyolefin heat-shrinkable film with high shrinking percentage and manufacturing method thereof | |
| CN102765190B (en) | Method for producing biaxially oriented multilayer co-extruded polyolefin shrink film by flat film process | |
| JPH0371465B2 (en) | ||
| CN110303748B (en) | Thinner polyolefin shrink film and production process thereof | |
| CN111231462A (en) | Easy-to-open transparent polyethylene blown film with thickness of less than 45 micrometers and preparation method thereof | |
| CN103358560B (en) | A kind of production method of multi-layer co-extruded low-temperature shrink Polyolefin Heat Shrinkable Film | |
| EP1147877A2 (en) | Production of stretch plastic film | |
| CN115635750A (en) | Low-temperature-resistant three-layer co-extrusion heavy packaging film | |
| CN110281621A (en) | A kind of polyethylene is two-way easily to tear packaging film | |
| CN103029396B (en) | Biaxially oriented polypropylene shrink film for cigarette packages and manufacturing method and application of shrink film | |
| JP2018154803A (en) | Polyethylene film | |
| CN114030258B (en) | Ultralow-strength easy-to-tear PE film and preparation process thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200605 |