CN114030258A - Ultralow-strength easy-tear PE film and preparation process thereof - Google Patents

Ultralow-strength easy-tear PE film and preparation process thereof Download PDF

Info

Publication number
CN114030258A
CN114030258A CN202111370409.9A CN202111370409A CN114030258A CN 114030258 A CN114030258 A CN 114030258A CN 202111370409 A CN202111370409 A CN 202111370409A CN 114030258 A CN114030258 A CN 114030258A
Authority
CN
China
Prior art keywords
parts
zone
film
tear
master batch
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.)
Granted
Application number
CN202111370409.9A
Other languages
Chinese (zh)
Other versions
CN114030258B (en
Inventor
吴伟
张贵金
王茂强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Donghai Packaging Industry Co ltd
Original Assignee
Qingdao Donghai Packaging Industry Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Qingdao Donghai Packaging Industry Co ltd filed Critical Qingdao Donghai Packaging Industry Co ltd
Priority to CN202111370409.9A priority Critical patent/CN114030258B/en
Publication of CN114030258A publication Critical patent/CN114030258A/en
Application granted granted Critical
Publication of CN114030258B publication Critical patent/CN114030258B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B32B27/32—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
    • 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
    • B32B27/06—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
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
    • C08J2477/06—Polyamides derived from polyamines and polycarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/20—Carboxylic acid amides

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)

Abstract

The application relates to the field of high polymer materials, and particularly discloses an ultra-low-strength easy-tear PE film and a preparation process thereof. The ultralow-strength easy-tear PE film comprises an inner layer, a middle layer and an outer layer which are sequentially stacked, wherein the inner layer comprises the following components in parts by weight: 20-40 parts of nano filling master batch, 30-60 parts of LDPE, 15-20 parts of m-LLDPE, 0.4-1.0 part of PPA auxiliary agent, 1-3 parts of slipping agent master batch, 1-3 parts of opening agent and 0.1-0.7 part of antioxidant; the middle layer and the outer layer are made of the same raw materials and comprise the following components in parts by weight: 50-80 parts of nano filling master batch, 20-50 parts of LDPE, 0.4-1.0 part of PPA auxiliary agent and 0.1-0.7 part of antioxidant. The ultra-low strength easy-to-tear PE film has the advantages of being low in cost, easy to tear in the transverse direction and the longitudinal direction.

Description

Ultralow-strength easy-tear PE film and preparation process thereof
Technical Field
The application relates to the technical field of high polymer materials, in particular to an ultralow-strength easy-tear PE film and a preparation process thereof.
Background
Polyethylene is a thermoplastic resin prepared by polymerizing ethylene, and has wide application in the field of plastics, such as PE packaging materials, and the traditional PE packaging materials generally have certain strength based on the requirement of protecting products, are difficult to open by hands when being used by consumers, often need other sharp tools, and are inconvenient to use. In addition, the easy-to-tear opening or the easy-to-tear line is processed on the small commodity packaging bag, the processing position is easy to deviate, a large amount of waste products are generated, and the production cost is increased.
In the prior art, chinese patent application No. CN110157074A discloses an easily-torn PE film material, which has a layered structure and comprises a film composed of the following components in percentage by weight: 55-70% of polyethylene, 30-40% of ethylene cycloolefin copolymer and 0-5% of processing aid.
Aiming at the related technologies, the inventor thinks that the conventional PE film uses HDPE and ethylene cycloolefin copolymer to realize easy tearing of the packaging film, but most packaging material manufacturers are difficult to bear due to the high cost of the ethylene cycloolefin copolymer, and the HDPE is easy to tear longitudinally (the advancing direction after being blown out by a film blowing machine) after being blown, so that the application requirement of low transverse (the advancing direction after being blown out by a touch machine) tearing strength required by a client product cannot be met.
Disclosure of Invention
In order to enable the PE film to be easily torn in the transverse and longitudinal directions, the application provides the ultra-low-strength easily-torn PE film and the preparation process thereof.
In a first aspect, the application provides an ultra-low strength easy-tear PE film, which adopts the following technical scheme:
the ultra-low strength easy-tear PE film comprises an inner layer, a middle layer and an outer layer which are sequentially stacked, wherein the inner layer comprises the following components in parts by weight: 20-40 parts of nano filling master batch, 30-60 parts of LDPE, 15-20 parts of m-LLDPE, 0.4-1.0 part of PPA auxiliary agent, 1-3 parts of slipping agent master batch, 1-3 parts of opening agent and 0.1-0.7 part of antioxidant;
the middle layer comprises the following components in parts by weight: 50-80 parts of nano filling master batch, 20-50 parts of LDPE, 0.4-1.0 part of PPA auxiliary agent and 0.1-0.7 part of antioxidant;
the outer layer comprises the following components in parts by weight: 50-80 parts of nano filling master batch, 20-50 parts of LDPE, 0.4-1.0 part of PPA auxiliary agent and 0.1-0.7 part of antioxidant;
the nano filling master batch contains 70-80% by mass of calcium carbonate and 20-30% by mass of LLDPE;
the LDPE has a melt index of 4-7g/10min and a density of 0.915-0.926g/cm3。
By adopting the technical scheme, the three-layer bidirectional easy-to-tear film is prepared by using the outer layer, the middle layer and the inner layer which are mutually overlapped, wherein the inner layer, the outer layer and the middle layer are all filled with the nano filling master batch which accounts for 50-80% of the total amount of the nano filling master batch and the LDPE, the nano filling master batch in the inner layer accounts for 20-40% of the total amount of the LDPE, the nano filling master batch and the m-LLDPE, and the nano filling master batch contains 70-80% of calcium carbonate by mass percentage so as to improve the bidirectional easy-to-tear effect of the PE film, in order to improve the dispersibility of the calcium carbonate in each layer, the LLDPE is used as the box volume of the calcium carbonate and each layer of raw materials, the calcium carbonate and the LLDPE are made into the master batch, the dispersibility of the calcium carbonate in each layer of raw materials is improved, the cost of the film can be reduced, the rheological property and the processability of the film can be improved, so that each layer of raw materials can obtain molecular chains which are arranged in parallel, and the directions of the molecules are the same, so that the elongation at break is reduced, and the PE film can be easily torn along a straight line when being subjected to external force.
The slow-migration slipping agent master batch is adopted, the adverse effect of the slipping agent on the composite fastness is reduced, and in order to ensure the slipping property and the opening property of the PE film, the non-migration opening agent is adopted, so that a better opening effect and surface slipping degree are achieved.
The LDPE in the inner layer, the outer layer and the middle layer is preferably produced by Kataler petrochemical FD0474 with a melt index of 4g/10min,the density is 0.923g/cm3, the workability and ductility are excellent, and the transparency is high; the PPA auxiliary agent is used in the inner layer, so that melt fracture can be eliminated, the yield is improved, material accumulation on a die is eliminated, a lubricating layer is formed between resin and a metal die during extrusion, the friction force during extrusion of the PE film is reduced, and the surface smoothness and the flatness of the PE film are enhanced; the m-LLDPE used in the inner layer preferably has a melt index of 0.5g/10min and a density of 0.92g/cm3The Exxon 2010MA has excellent anti-pollution performance, hot adhesion strength and heat sealing strength, and can prevent the PE film from being attached to the surface of an inner layer to influence the heat sealing strength and the sealing performance when a product is filled into a packaging bag after the PE film is prepared into the packaging bag;
wherein the inner layer comprises the following components in parts by weight: 30-40 parts of nano filling master batch, 30-55 parts of LDPE (low-density polyethylene), 15-20 parts of m-LLDPE (linear low-density polyethylene), 0.6-1.0 part of PPA (poly-p-phenylene-acrylate) auxiliary agent, 2-3 parts of slipping agent master batch, 2-3 parts of opening agent and 0.3-0.5 part of antioxidant;
the middle layer comprises the following components in parts by weight: 70-80 parts of nano filling master batch, 20-30 parts of LDPE, 0.6-1.0 part of PPA auxiliary agent and 0.3-0.5 part of antioxidant;
the outer layer comprises the following components in parts by weight: 70-80 parts of nano filling master batch, 20-30 parts of LDPE, 0.6-1.0 part of PPA auxiliary agent and 0.3-0.5 part of antioxidant;
the nano filling master batch contains 80 mass percent of calcium carbonate and 20 mass percent of LLDPE;
the LDPE has a melt index of 4g/10min and a density of 0.923g/cm3。
By adopting the technical scheme, the PE film prepared by selecting a better ratio can achieve a better bidirectional easy-tearing effect, the nano filling master batch accounts for 70-80% of the total weight of the nano filling master batch and the LDPE in the outer layer and the middle layer, the nano filling master batch accounts for 30-40% of the total weight of the nano filling master batch, the LDPE and the m-LLDPE in the inner layer, and the nano filling master batch in the middle layer, the inner layer and the outer layer consists of 80% of calcium carbonate and 20% of LLDPE in mass percentage, so that the better bidirectional easy-tearing effect can be provided.
Preferably, the ultralow-strength easy-to-tear PE film comprises an inner layer, a middle layer and an outer layer which are sequentially stacked;
wherein the inner layer comprises the following components in parts by weight: 40 parts of nano filling master batch, 40 parts of LDPE, 20 parts of m-LLDPE, 0.8 part of PPA auxiliary agent, 2 parts of slipping agent master batch, 2 parts of opening agent and 0.4 part of antioxidant;
the middle layer comprises the following components in parts by weight: 60 parts of nano filling master batch, 40 parts of LDPE, 0.8 part of PPA auxiliary agent and 0.4 part of antioxidant;
the outer layer comprises the following components in parts by weight: 60 parts of nano filling master batch, 40 parts of LDPE, 0.8 part of PPA auxiliary agent and 0.4 part of antioxidant;
the nano filling master batch contains 80 mass percent of calcium carbonate and 20 mass percent of LLDPE;
the LDPE has a melt index of 4g/10min and a density of 0.923g/cm3。
By adopting the technical scheme, the PE film prepared by selecting a better proportion can achieve a better easy-tearing effect, the dosage of the nano filling master batch in the inner layer is 40 percent of the total amount of the nano filling master batch, the m-LLDPE and the LDPE, the dosage of the nano filling master batch in the middle layer and the outer layer is 60 percent of the total amount of the nano filling master batch and the LDPE, wherein the melt index of the LDPE is 4g/10min, and the density is 0.923g/cm3The nano filling master batch contains 80 mass percent of nano calcium carbonate and 20 mass percent of LLDPE, and can provide a good bidirectional easy-tearing effect.
Preferably, the calcium carbonate has a particle size of 2 to 5 μm.
By adopting the technical scheme, the particle size of the calcium carbonate is controlled to be 2-5 mu m, so that the lubricating property of the PE film can be enhanced, the friction coefficient can be reduced, and the haze and the barrier property can be increased.
Preferably, the thickness ratio of the inner layer, the middle layer and the outer layer is 1:2-3: 1-2.
Through adopting above-mentioned technical scheme, because of outer and medial raw materials intensity is low, so with middle level and outer raw materials proportion increase, enable PE membrane to have better heat sealability, guarantee that it easily tears the effect.
Preferably, the slip agent master batch comprises 10-15% by weight of erucamide, 10-15% by weight of silica and 70-80% by weight of high-melting LDPE.
By adopting the technical scheme, because the common slipping agent is added into the film, the slipping agent of the film can be reduced along with the lapse of time and the rise of temperature, in the application, erucamide is taken as the slipping agent, silicon dioxide is taken as the opening agent, and high-melting LDPE is taken as the slipping agent, the compatilizer between the opening agent and the inner layer material, so that the migration speed of the erucamide can be reduced, the effective time of the erucamide can be prolonged, the loss amount of the erucamide can be reduced, the erucamide can be prevented from being rapidly separated out of the film, the friction coefficient can be reduced, the production efficiency and the appearance quality of the film can be improved, and the high-melting LDPE is more easily dispersed, the low strength can be maintained, and the film is easy to tear; the opening agent can effectively improve the opening performance of the PE film, prevent the PE film from adhesion, has little influence on haze by silicon dioxide, and can improve the terminal yellowing phenomenon.
In a second aspect, the application provides a preparation process of an ultra-low strength easy-tear PE film, which adopts the following technical scheme: a preparation process of an ultralow-strength easy-tear PE film comprises the following steps:
preparing materials: preparing raw materials of an inner layer, a middle layer and an outer layer according to a proportion for later use;
and (3) heating: carrying out zoned continuous heating on the film blowing unit, wherein the die head temperature is 140-150 ℃, the outer layer host temperature is 120-160 ℃, the middle layer host temperature is 120-160 ℃, and the inner layer host temperature is 120-160 ℃;
blow molding: mixing the raw materials of each layer after matching, respectively placing the raw materials into corresponding main machines, starting an air cooler, keeping the air inlet temperature at 20 +/-2 ℃ and the fan frequency at 40-50Hz, drawing upwards, rapidly kneading melt adhesive, injecting compressed air into a die head, controlling the blow-up ratio to be 2-3, then drawing up the bubble at a constant speed, wherein the drawing speed is 19-19.5m/min, and the drawing ratio is 4-10;
winding: and cutting the film bubble into two pieces after corona treatment, rolling and packaging.
By adopting the technical scheme, the extrusion temperature of each layer is 20-30 ℃ lower than the traditional plasticizing temperature, the flatness of the PE film can be improved, the PE film is prevented from being denatured, in addition, the blowing ratio is controlled to be 2-3, the traction ratio is 4-10, the traction is prevented from being too fast, the longitudinal tensile strength of the PE film is increased, the thickness is reduced, the traction is prevented from being too slow, the longitudinal tensile strength of the PE film is reduced, the thickness is increased, the increase of the blowing ratio can improve the transverse tensile strength of the PE film, the film bubble can be further unstable, and wrinkles appear on the surface of the film.
Preferably, in the temperature rising step, after the temperature rising is finished, the computer is started after the temperature is kept for 20-30min, the starting sequence is an outer layer host, a middle layer host and an inner layer host, and the starting time interval is 2-4 min.
By adopting the technical scheme, the temperature of each layer of host machine can be more uniform by keeping the temperature for 20-30min, each zone can be completely heated, and the poor product quality caused by nonuniform heating of the three-layer coextrusion film blowing unit in the production process can be prevented; because the temperature of the outer layer host computer is slightly higher than that of the middle layer host computer, and the temperature of the middle layer host computer is slightly higher than that of the inner layer host computer, the outer layer host computer, the middle layer host computer and the inner layer host computer are sequentially started when the computer is started, and the processing performance of the product is improved.
Preferably, in the blow molding step, the rotating speed of the outer layer main machine is 80-120r/min, the rotating speed of the middle layer main machine is 80-120r/min, and the rotating speed of the inner layer main machine is 40-60 r/min.
By adopting the technical scheme, the rotating speeds of the outer layer and the middle layer are higher than that of the inner layer, the mixing state of the raw materials in the outer layer and the middle layer can be enhanced, the rotating speed of the inner layer is slightly lower, the plasticizing time of the inner layer can be prolonged, the detention time of the material in the inner layer is prolonged, and the reaction degree is improved.
Preferably, in the temperature raising step, the set temperatures of the first zone, the second zone, the third zone, the fourth zone, the fifth zone and the sixth zone of the inner-layer host are respectively: 120-125 ℃, 130-135 ℃, 140-145 ℃, 150-155 ℃, 155-160 ℃ and 150-155 ℃;
the set temperatures of the first zone, the second zone, the third zone, the fourth zone, the fifth zone and the sixth zone of the outer layer host machine are respectively as follows: 120-125 ℃, 130-135 ℃, 140-145 ℃, 150-155 ℃, 155-160 ℃ and 150-155 ℃;
the set temperatures of the first zone, the second zone, the third zone, the fourth zone, the fifth zone and the sixth zone of the middle layer host machine are respectively as follows: 120-125 ℃, 130-135 ℃, 140-145 ℃, 150-155 ℃, 155-160 ℃ and 150-155 ℃;
the set temperatures of the first zone, the second zone, the third zone, the fourth zone, the fifth zone and the sixth zone of the die head are respectively as follows: 145-150 ℃, 145-150 ℃ and 140-145 ℃.
By adopting the technical scheme, the temperature of each layer of host machine is 20-30 ℃ lower than that of the conventional blow molding process, and the plasticization of the LDPE resin is improved to the greatest extent by accurately controlling the stability of the temperature of each region, so that the resin is prevented from being decomposed at a higher temperature, the phenomenon that the resin is not well plasticized due to too low temperature, the surface glossiness and transparency of the PE film are reduced, and the processability is improved.
In summary, the present application has the following beneficial effects:
1. because the nano filling master batch is added into each layer of raw materials, the dosage ratio of the nano filling master batch to the LDPE is controlled, the nano filling master batch contains 70-80% of calcium carbonate by mass percent, the bidirectional easy-tearing effect can be achieved, the COD (chemical oxygen demand) is not used, the cost is reduced, the tensile breaking strength of the manufactured bidirectional easy-tearing PE film is 30-50% of that of the conventional PE film, the tensile breaking force of the whole material after compounding and the low-strength tearing after the tearing line are formed can be well realized, the stable processing of the product is realized, no fold or rupture occurs, and the stable production is realized.
2. In the application, the appropriate blow-up ratio and traction ratio are preferably adopted, so that a better transverse linear tearing effect can be realized, and the flatness and the smoothness of the PE film are improved; and the blow molding temperature of 20-30 ℃ compared with the conventional blow molding process is used, so that the decomposition and poor plasticization of raw materials of each layer can be prevented, and the glossiness and transparency of the easily-torn film are improved.
3. Erucamide, silicon dioxide and LDPE are preferably adopted as a slipping agent master batch in the application, a conventional slipping agent is not added or used, a slow-migration slipping agent is used, the adverse effect of the slipping agent on the composite fastness is reduced, and in addition, a non-migration nano opening agent is added for the slip property and the opening property of a PE (polyethylene) film, so that the good opening property and the surface slip degree can be achieved.
Detailed Description
The sources of the raw materials in example 1 are shown in table 1:
TABLE 1
Figure BDA0003362173190000051
Figure BDA0003362173190000061
Examples
Example 1: an ultra-low strength easy-tear PE film comprises an inner layer, a middle layer and an outer layer which are mutually overlapped, wherein the thickness ratio of the inner layer to the middle layer to the outer layer is 1:2:2, the raw material ratio of the inner layer is shown in a table 2, the raw material ratio of the outer layer to the middle layer is the same, as shown in a table 3, in the table 2 and the table 3, a nano filling master batch comprises 80% by mass of calcium carbonate and 20% by mass of LLDPE, the particle size of the calcium carbonate is 5 mu m, a slip agent master batch comprises 10% by weight of erucamide, 10% by weight of silicon dioxide and 80% by weight of high-melting index LDPE, and an antioxidant is 1010.
The preparation method of the ultralow-strength easy-tear PE film comprises the following steps:
s1, batching: preparing raw materials of an inner layer, a middle layer and an outer layer according to a proportion for later use;
s2, heating: and (3) carrying out zone continuous heating on the film blowing unit, wherein the temperature of each zone of the die head is as follows: 150 ℃ in the first area, 150 ℃ in the second area, 150 ℃ in the third area and 140 ℃ in the fourth area; the temperature of each zone of the outer layer host machine is as follows: 120 ℃ in the first area, 130 ℃ in the second area, 140 ℃ in the third area, 150 ℃ in the fourth area, 160 ℃ in the fifth area, three, four and six areas and 150 ℃ in the sixth area; the temperature is 160 ℃ plus 120 ℃, the temperature of the middle layer host is 160 ℃ plus 120 ℃, the temperature of the inner layer host is 160 ℃ plus 120 ℃, the temperature is kept for 20min after the temperature rise is finished, then the computer is started, the starting sequence comprises the outer layer host, the middle layer host and the inner layer host, and the starting time interval is 2 min;
s3, blow molding: mixing the raw materials of each layer after completing the matching, respectively placing the mixed raw materials in corresponding hosts, wherein the rotating speed of an outer layer host is 100r/min, the rotating speed of a middle layer host is 100r/min, the rotating speed of an inner layer host is 50r/min, starting an air cooler, keeping the air inlet temperature at 20 ℃ and the fan frequency at 40Hz, drawing upwards and rapidly kneading molten rubber, injecting compressed air into a die head, controlling the blowing ratio to be 2.5, then drawing up the film bubble at a constant speed, controlling the drawing speed to be 19.3m/min and the drawing ratio to be 6;
s4, rolling: and (3) carrying out corona treatment on the film bubble to enable the surface tension of the PE film to be 40mN/M, cutting into two pieces, rolling and packaging.
TABLE 2 raw material ratios of inner layers in examples 1 to 8
Figure BDA0003362173190000062
Figure BDA0003362173190000071
Table 3 amounts of raw materials for outer and intermediate layers in example 1 and examples 9-16
Figure BDA0003362173190000072
Examples 2 to 8: the raw material ratio of the outer layer and the middle layer of the ultra-low strength easy-tearing PE film is the same as that of the example 1, and the dosage of each raw material in the inner layer is shown in the table 2.
Examples 9 to 12: the raw material ratio of the inner layer and the outer layer of the ultra-low strength easy-tearing PE film is the same as that of the example 1, and the raw material dosage of the middle layer is shown in the table 3.
Examples 13 to 16: the raw material ratio of the inner layer and the middle layer of the ultra-low strength easy-tearing PE film is the same as that of the example 1, and the raw material dosage of the outer layer is shown in the table 3.
Example 17: an ultra-low strength easy-tear PE film differs from example 1 in that the LDPE in the outer layer has a melt index of 7g/10min and a density of 0.9182(2.3 g/m)3) Selected from Yanshan petrochemical, model number 1C 7A.
Comparative example
Comparative example 1: an ultra-low strength easy-tear PE film is different from the PE film in the embodiment 1 in that LDPE in the inner layer has a melt index of 3g/10min and a density of 0.921g/cm3Is selected from Taiwan polymerization, type is NA112-27。
Comparative example 2: an ultra-low strength easy-tear PE film, which is different from that of example 1 in that a melt index of 10g/10min and a density of 0.917(2.3 g/cm) are adopted in the inner layer3) Selected from the famous petrochemicals with model number 868- & 000.
Comparative example 3: an ultra-low strength easy-tear PE film differed from example 1 in that the amount of calcium carbonate incorporated in the nano-filler masterbatch in the inner layer was 20%.
Comparative example 4: an ultra-low strength easy-tear PE film is different from the PE film in the embodiment 1 in that the dosage of nano filling master batch in the inner layer is 60kg, the dosage of LDPE is 40kg, and the dosage of m-LLDPE is 20 kg.
Comparative example 5: an ultra-low strength easy-tear PE film, which is different from example 1, has a blow-up ratio of 6 in step S3.
Comparative example 6: an ultra-low strength easy-tear PE film, which is different from example 1, has a draw ratio of 21.4 in step S3.
Comparative example 7: an ultra-low strength easy-tear PE film is different from the PE film in the embodiment 1 in that LDPE in the outer layer is selected to have the melt index of 2g/10min and the density of 0.924g/cm3The LDPE of (1) is selected from the famous petrochemicals, and the model number is 2436H.
Comparative example 8: an ultra-low strength easy-tear PE film, which is different from that of example 1 in that a melt index of 10g/10min and a density of 0.917(2.3 g/cm) are adopted in the outer layer3) Selected from the famous petrochemicals with model number 868- & 000.
Comparative example 9: an ultra-low strength easy-tear PE film is different from the PE film in the embodiment 1 in that LDPE in the outer layer and the middle layer has a melt index of 2g/10min and a density of 0.924g/cm3The LDPE of (1) is selected from the famous petrochemicals, and the model number is 2436H.
Comparative example 10: an ultra-low strength easy-tear PE film differed from example 1 in that the amount of calcium carbonate incorporated in the nano-filler masterbatch in the outer layer was 20%.
Comparative example 11: an ultra-low strength easy-tear PE film differed from example 1 in that the amount of calcium carbonate incorporated in the nano-filler masterbatch in the outer and middle layers was 20%.
Comparative example 12: an ultra-low strength easy-tear PE film is different from the PE film in example 1 in that the amount of nano filling master batch in the outer layer is 90kg, and the amount of LDPE in the outer layer is 10 kg.
Comparative example 13: an ultra-low strength easy-tear PE film, which is different from example 1 in that the amount of nano-filler masterbatch in the outer layer and the middle layer is 90Kg, and the amount of LDPE is 10 Kg.
Comparative example 14: a bidirectional easy-to-tear film has a three-layer structure comprising an outer layer, a middle layer and an inner layer, wherein the weight percentages of the three layers of materials are respectively as follows: 30% of an outer layer, 40% of a middle layer and 30% of an inner layer; each layer consists of the following components: the outer layer comprises the following components in percentage by weight: 55% of high-pressure low-density polyethylene, 22% of high-density polyethylene, 15% of linear low-density polyethylene and 8% of ethylene-acrylic acid copolymer (EAA); the middle layer comprises the following components in percentage by weight: 20% of high-pressure low-density polyethylene, 15% of metallocene high-density polyethylene, 20% of ethylene-methacrylic acid polymer and 45% of ionomer; the inner layer comprises the following components in percentage by weight: 40% of high-pressure low-density polyethylene, 15% of metallocene low-density polyethylene, 26.5% of linear low-density polyethylene, 1% of opening agent (silicon dioxide), 2% of antistatic agent and 0.5% of fluorine-containing polymer (PPA). The method for preparing the bidirectional easy-to-tear film comprises the following steps: respectively mixing the raw materials of the outer layer, the middle layer and the inner layer according to the weight percentage by an automatic mixing system, putting the raw materials of each layer into an outer layer extruder, a middle layer extruder and an inner layer extruder for melting and plasticizing, then sending the mixture into a die head for co-extrusion to form film bubbles, and rolling the film bubbles after automatic air ring cooling and corona treatment to obtain the bidirectional easily-torn film; wherein the temperature of the outer layer extruder is 180 ℃, and the extrusion pressure is 200 bar; the temperature of the middle layer extruder is 170 ℃, and the extrusion pressure is 250 bar; the temperature of the inner extruder was 175 ℃, the extrusion pressure was 220bar and the die temperature was 180 ℃.
Performance test
Ultra-low strength tear-off PE films were prepared according to the methods of the examples and comparative examples, and the mechanical properties of the tear-off PE films were measured according to the following methods, with the test results of examples 1 to 8 being reported in table 4, the test results of comparative examples 1 to 6 being reported in table 5, the test results of examples 9 to 18 being reported in table 6, and the test results of comparative examples 7 to 14 being reported in table 7.
1. Tensile strength at break and elongation at break: detecting according to GB/T13022-1991 'Plastic film tensile property test method';
2. tear strength: detecting according to GB/T16578-1996 tear resistance test method for plastic films and sheets;
3. coefficient of friction: detecting according to GB/T1006 friction coefficient determination method for plastic film and sheet;
4. impact strength: according to GB9639.1-2008, test method for impact resistance of plastic films and sheets, part 1 of free dart method: relevant Standard of Cascade method
5. Light transmittance and haze: detecting according to GB/T2410-2008 'determination of transparent plastic light transmittance and haze';
6 Heat seal Strength (0.2MPa, 1 s): the detection was carried out according to QB/T2358-1998 test method for heat seal strength of Plastic film packaging bags.
Table 4 test results of ultra-low strength easy-to-tear PE films in examples 1-8
Figure BDA0003362173190000091
Figure BDA0003362173190000101
As can be seen from the data in Table 4, in example 1, the amount ratio of the nano filling masterbatch to the LDPE in the outer layer and the intermediate layer was controlled to be 3:2, and the amount ratio of the LDEP, the nano filling masterbatch and the m-LDPE in the heat seal layer was controlled to be 4:4:2, wherein the content of calcium carbonate in the nano filling masterbatch was 80%, the content of LLDPE was 20%, the melt index of LDPE was 4g/10min, and the density was 0.923g/cm3And the easy-to-tear PE film is prepared by a process with a blow-up ratio of 2.5 and a migration ratio of 6, and the detection data in the table 4 show that the easy-to-tear PE film has low tensile strength at break, low elongation at break, extremely low tearing strength in both transverse direction and longitudinal direction, and better performance of easy tearing in both transverse direction and longitudinal direction.
In the examples 2 to 3, the content of calcium carbonate in the nano-filler masterbatch is reduced compared with that in the example 1, and table 4 shows that the elongation at break, the transverse strength, the longitudinal strength and the like of the PE film are not much different from those in the example 1, and still have a good two-way easy-tear effect, but the friction coefficient of the PE film is increased due to the reduction of the content of calcium carbonate.
Examples 4-5 reduced the amount of nano-filler concentrate compared to example 1, but the calcium carbonate content in the nano-filler concentrate was considered to be 80%, as can be seen from the data in table 4, the tensile strength at break and the elongation at break increased to some extent, but the increase was not significant, and still had a better easy-tear effect.
Example 6 differs from example 1 in that the amount of slip agent concentrate and the ratio of the amount of erucamide in the slip agent concentrate were varied, as shown in table 4, the tensile strength at break and elongation at break of the PE film in example 6 were compromised, and the tear strength was low in both the cross and machine directions, with good ease of tearing in both the cross and machine directions.
Examples 7-8 compared to example 1, the lubricating agent concentrate of example 7 had no erucamide added thereto, and the lubricating agent concentrate of example 8 had an increased erucamide content ratio, and the results in table 4 show that the mechanical properties such as tear strength increased, the tearability decreased, and the coefficient of friction increased in examples 7 and 8, and the coefficient of friction decreased in example 7 and the heat seal strength decreased, although the coefficient of friction decreased in example 8.
TABLE 5 test results of ultra-low strength easy-to-tear PE films in comparative examples 1 to 6
Figure BDA0003362173190000102
Figure BDA0003362173190000111
Comparative example 1 compared with example 1, LDPE with a melt index of 3g/10min was used in the heat seal layer, and as can be seen from the data in Table 5, the PE film prepared in comparative example 1 has increased tensile strength at break, elongation at break and tear strength, and the friction coefficient is not much different from that of example 1, but the heat seal strength is reduced, which shows that the use of LDPE with a smaller melt index can reduce the easy-tear effect of the PE film and increase the haze.
Comparative document 2 uses LDPE having a melt index of 10g/10min as compared to example 1, and the melt index is increased as compared to example 1, and the data in Table 5 shows that the heat seal strength is reduced.
Compared with the example 1, the content of calcium carbonate in the nano filling master batch is reduced to 20%, and the PE film prepared by the comparative example 3 has the advantages of increased mechanical properties such as tearing strength, weakened easy tearing effect, increased friction coefficient, reduced haze and heat sealing strength.
Comparative example 4 in comparison with example 1, in comparative example 4 in which the amount of the nano-filler master batch was increased, tensile strength at break, elongation at break and tear strength of the PE film produced in comparative example 4 were not much different from those of example 1, but the friction coefficient was decreased, haze was increased and heat seal strength was decreased.
Comparative example 5 compared with example 1, the blow-up ratio of the prepared PE film was reduced, the tensile strength at break in the transverse direction of the PE film in comparative example 5 was increased, the change in the tensile strength at break in the longitudinal direction was small, and the effect of easy tearing in the transverse direction was reduced.
Comparative example 6 reduced the draw ratio at the time of producing the PE film as compared with example 1, and table 5 shows that the tensile strength at break in the transverse direction and the elongation at break in the transverse direction of the PE film in comparative example 6 are reduced, the tensile strength at break in the machine direction and the elongation at break in the machine direction are increased, and the effect of easy tearing in the machine direction of the PE film is weakened as compared with example 1.
TABLE 6 Performance testing of ultra-low Strength easy-tear PE films in examples 9-18
Figure BDA0003362173190000112
Figure BDA0003362173190000121
As can be seen from the data in table 6, the amount of calcium carbonate in the nano filler masterbatch in the intermediate layer is changed in examples 9 and 10 compared to example 1, and as can be seen from the data in table 6, the detection results of the PE films prepared in examples 9 and 10 are similar to those of example 1, and the PE film has lower tensile strength at break, elongation at break and tear strength, better two-way easy-tear effect, small surface friction coefficient and good heat sealing performance.
The amount of the nano-filler masterbatch is increased in examples 11 and 12 compared with example 1, and the data in table 6 shows that the mechanical properties such as tensile strength at break of the PE film in examples 11 and 12 are increased compared with example 1, but the increase is not significant, which indicates that examples 11 and 12 still have better easy-tear effect.
Compared with example 1, the amount of calcium carbonate in the nano-filler masterbatch in the outer layer is changed in examples 13 and 14, and the amount of nano-filler masterbatch in examples 15 and 16 is changed, and it can be seen from the data in table 6 that the mechanical properties such as tensile strength at break, elongation at break, and the like of the PE films prepared in examples 13 to 16 are still lower, which indicates that the PE films in examples 13 to 16 have better two-way easy-tear effect.
Example 17 compared to example 11, the outer layer used a LDPE with a melt index of 7g/10min,
table 7 test results of the bi-directional easy-tear PE films in comparative examples 7 to 14
Figure BDA0003362173190000122
Figure BDA0003362173190000131
Comparative example 7 and comparative example 8 in comparison with example 1, LDPE having a melt index of 2g/10min and LDPE having a melt index of 10g/10min were added respectively, and as can be seen from the data in Table 7, the tensile strength at break, elongation at break and tear strength of the PE film in comparative example 7 are greater than those in example 1, and the coefficient of friction is increased and the heat seal strength is decreased; comparative example 8 shows little change in mechanical properties such as elongation at break, but shows a decrease in coefficient of friction and a decrease in heat seal strength.
Comparative example 9 Using LDPE having a melt index of 2g/10min in the middle and outer layers as compared with example 1, the PE film in example 9 has increased tensile strength at break and the like as compared with example 1 and comparative example 7, indicating decreased tearability, and the PE film has higher haze, increased coefficient of friction, and decreased heat seal strength.
Comparative example 10 the calcium carbonate content in the nano-filler masterbatch in the outer layer was 20% as compared to example 1, and comparative example 11 the calcium carbonate content in both the outer layer and the middle layer was 20% as compared to example 1. from the data in table 7, it can be seen that the tensile strength at break of the PE film made in comparative example 11 was greater than that of comparative example 10 with respect to the rate of increase in example 1, and the easy tear properties of the PE films made in comparative example 10 and comparative example 11 were both decreased, and were significantly decreased in comparative example 11.
Comparative example 12 is compared with example 1, the amount of the nano filling master batch in the outer layer is increased to 90kg, comparative example 13 is compared with example 1, the amount of the nano filling master batch in the outer layer and the nano filling master batch in the middle layer are both increased to 90kg, the impact strength of the PE film in comparative example 13 is increased, the mechanical properties such as elongation at break and the like are obviously enhanced, and the increase rate of the mechanical properties of comparative example 13 is larger than that of comparative example 12 in example 1, which shows that the increase of the amount of the nano filling master batch causes the PE film to obtain a weakened tearing effect.
Comparative example 14 is a conventional biaxially oriented, easy-tear PE film having greater tensile strength at break in both the transverse and longitudinal directions than in example 1, and greater elongation at break in both the transverse and longitudinal directions than in example 1, and having a less biaxially oriented effect than in example 1.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims (10)

1. The ultra-low strength easy-tear PE film is characterized by comprising an inner layer, a middle layer and an outer layer which are sequentially stacked, wherein the inner layer comprises the following components in parts by weight: 20-40 parts of nano filling master batch, 30-60 parts of LDPE, 15-20 parts of m-LLDPE, 0.4-1.0 part of PPA auxiliary agent, 1-3 parts of slipping agent master batch, 1-3 parts of opening agent and 0.1-0.7 part of antioxidant;
the middle layer comprises the following components in parts by weight: 50-80 parts of nano filling master batch, 20-50 parts of LDPE, 0.4-1.0 part of PPA auxiliary agent and 0.1-0.7 part of antioxidant;
the outer layer comprises the following components in parts by weight: 50-80 parts of nano filling master batch, 20-50 parts of LDPE, 0.4-1.0 part of PPA auxiliary agent and 0.1-0.7 part of antioxidant;
the nano filling master batch comprises 70-80% of calcium carbonate and 20-30% of LLDPE by mass percent;
the LDPE has a melt index of 4-7g/10min and a density of 0.915-0.926g/cm3。
2. The ultra-low strength easy tear PE film of claim 1, wherein: the ultra-low strength easy-to-tear PE film comprises an inner layer, a middle layer and an outer layer which are sequentially stacked;
wherein the inner layer comprises the following components in parts by weight: 30-40 parts of nano filling master batch, 30-55 parts of LDPE (low-density polyethylene), 15-20 parts of m-LLDPE (linear low-density polyethylene), 0.6-1.0 part of PPA (poly-p-phenylene-acrylate) auxiliary agent, 2-3 parts of slipping agent master batch, 2-3 parts of opening agent and 0.3-0.5 part of antioxidant;
the middle layer comprises the following components in parts by weight: 70-80 parts of nano filling master batch, 20-30 parts of LDPE, 0.6-1.0 part of PPA auxiliary agent and 0.3-0.5 part of antioxidant;
the outer layer comprises the following components in parts by weight: 70-80 parts of nano filling master batch, 20-30 parts of LDPE, 0.6-1.0 part of PPA auxiliary agent and 0.3-0.5 part of antioxidant;
the nano filling master batch contains 80 mass percent of calcium carbonate and 20 mass percent of LLDPE;
the LDPE has a melt index of 4g/10min and a density of 0.923g/cm3。
3. The ultra-low strength easy-tear PE film according to claim 1, wherein the ultra-low strength easy-tear PE film comprises an inner layer, a middle layer and an outer layer which are sequentially stacked;
wherein the inner layer comprises the following components in parts by weight: 40 parts of nano filling master batch, 40 parts of LDPE, 20 parts of m-LLDPE, 0.8 part of PPA auxiliary agent, 2 parts of slipping agent master batch, 2 parts of opening agent and 0.4 part of antioxidant;
the middle layer comprises the following components in parts by weight: 60 parts of nano filling master batch, 40 parts of LDPE, 0.8 part of PPA auxiliary agent and 0.4 part of antioxidant;
the outer layer comprises the following components in parts by weight: 60 parts of nano filling master batch, 40 parts of LDPE, 0.8 part of PPA auxiliary agent and 0.4 part of antioxidant;
the nano filling master batch contains 80 mass percent of calcium carbonate and 20 mass percent of LLDPE;
the LDPE has a melt index of 4g/10min and a density of 0.923g/cm3。
4. An ultra-low strength easy tear PE film according to any of claims 1-3 wherein the calcium carbonate has a particle size of 2-5 μm.
5. The ultra-low strength easy-tear PE film according to any of claims 1-3, characterized in that the thickness ratio of the inner layer, the intermediate layer and the outer layer is 1:2-3: 1-2.
6. The ultra low strength easy tear PE film of any of claims 1-3 wherein the slip agent masterbatch comprises 10-15% by weight erucamide, 10-15% silica and 70-80% high melt index LDPE.
7. The process for preparing an ultra-low strength easy-to-tear PE film according to any one of claims 1 to 6, comprising the steps of:
preparing materials: preparing raw materials of an inner layer, a middle layer and an outer layer according to a proportion for later use;
and (3) heating: carrying out zoned continuous heating on the film blowing unit, wherein the die head temperature is 140-150 ℃, the outer layer host temperature is 120-160 ℃, the middle layer host temperature is 120-160 ℃, and the inner layer host temperature is 120-160 ℃;
blow molding: mixing the raw materials of each layer after matching, respectively placing the raw materials into corresponding main machines, starting an air cooler, keeping the air inlet temperature at 20 +/-2 ℃ and the fan frequency at 40-50Hz, drawing upwards, rapidly kneading melt adhesive, injecting compressed air into a die head, controlling the blow-up ratio to be 2-3, then drawing up the bubble at a constant speed, wherein the drawing speed is 19-19.5m/min, and the drawing ratio is 4-10;
winding: and cutting the film bubble into two pieces after corona treatment, rolling and packaging.
8. The process for preparing the ultra-low strength easy-to-tear PE film according to claim 7, wherein in the heating step, after the heating is completed, the film is started after heat preservation is carried out for 20-30min, the starting sequence comprises an outer layer host, a middle layer host and an inner layer host, and the starting time interval is 2-4 min.
9. The preparation process of the ultra-low strength easy-tear PE film according to claim 7, wherein in the blow molding step, the rotation speed of the outer layer main machine is 80-120r/min, the rotation speed of the middle layer main machine is 80-120r/min, and the rotation speed of the inner layer main machine is 40-60 r/min.
10. The preparation process of the ultra-low strength easy-to-tear PE film according to claim 7, wherein in the temperature raising step, the set temperatures of the first zone, the second zone, the third zone, the fourth zone, the fifth zone and the sixth zone of the inner layer host machine are respectively as follows: 120-125 ℃, 130-135 ℃, 140-145 ℃, 150-155 ℃, 155-160 ℃ and 150-155 ℃;
the set temperatures of the first zone, the second zone, the third zone, the fourth zone, the fifth zone and the sixth zone of the outer layer host machine are respectively as follows: 120-125 ℃, 130-135 ℃, 140-145 ℃, 150-155 ℃, 155-160 ℃ and 150-155 ℃;
the set temperatures of the first zone, the second zone, the third zone, the fourth zone, the fifth zone and the sixth zone of the middle layer host machine are respectively as follows: 120-125 ℃, 130-135 ℃, 140-145 ℃, 150-155 ℃, 155-160 ℃ and 150-155 ℃;
the set temperatures of the first zone, the second zone, the third zone, the fourth zone, the fifth zone and the sixth zone of the die head are respectively as follows: 145-150 ℃, 145-150 ℃ and 140-145 ℃.
CN202111370409.9A 2021-11-18 2021-11-18 Ultralow-strength easy-to-tear PE film and preparation process thereof Active CN114030258B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111370409.9A CN114030258B (en) 2021-11-18 2021-11-18 Ultralow-strength easy-to-tear PE film and preparation process thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111370409.9A CN114030258B (en) 2021-11-18 2021-11-18 Ultralow-strength easy-to-tear PE film and preparation process thereof

Publications (2)

Publication Number Publication Date
CN114030258A true CN114030258A (en) 2022-02-11
CN114030258B CN114030258B (en) 2024-02-06

Family

ID=80144999

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111370409.9A Active CN114030258B (en) 2021-11-18 2021-11-18 Ultralow-strength easy-to-tear PE film and preparation process thereof

Country Status (1)

Country Link
CN (1) CN114030258B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114752134A (en) * 2022-06-15 2022-07-15 河北上东包装科技有限公司 Polyethylene easily-torn film

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012000885A (en) * 2010-06-17 2012-01-05 Japan Polyethylene Corp Easily tearable multilayered film and packaging material
US20130245201A1 (en) * 2012-03-16 2013-09-19 King Abdulaziz City For Science And Technology Lldpe-ldpe blown film blend
CN104015439A (en) * 2014-06-05 2014-09-03 成都五牛壮达新材料有限公司 Bidirectional CPP (casting polypropylene) film easy to tear out and preparation method thereof
JP2015182378A (en) * 2014-03-25 2015-10-22 日本ポリエチレン株式会社 Easily tearable multilayer film and packaging material, and liquid product packaging bag
CA3031311A1 (en) * 2016-07-20 2018-01-25 Toyo Seikan Group Holdings, Ltd. Easy-to-tear, unstretched resin film and laminate film for packaging material using the same
CN108189506A (en) * 2018-01-16 2018-06-22 青岛东海包装产业有限公司 PE films and preparation method thereof are easily taken off in heat-sealing repeatedly
CN108276640A (en) * 2018-01-19 2018-07-13 四川厚诚新材料有限公司 One kind is two-way easily to tear curtain coating PE films and preparation method thereof
CN108773137A (en) * 2018-06-25 2018-11-09 青岛东海包装产业有限公司 Automatically it is packed for polyethylene film and preparation method thereof
CN109263200A (en) * 2018-09-30 2019-01-25 黄山永新股份有限公司 A kind of two-way linear easily tears polyethylene film and its production technology
CN109648968A (en) * 2018-12-18 2019-04-19 江门市蓬江区华龙包装材料有限公司 A kind of two-way easily tore film
CN109705446A (en) * 2018-12-27 2019-05-03 佛山佛塑科技集团股份有限公司 A kind of modified polyolefin mother material and its preparation method and application
CN110157074A (en) * 2019-05-30 2019-08-23 厦门市杏林意美包装有限公司 It is a kind of easily to tear PE membrane material and its preparation method and application
CN110281621A (en) * 2019-07-19 2019-09-27 河南省银丰塑料有限公司 A kind of polyethylene is two-way easily to tear packaging film
CN112848588A (en) * 2021-01-04 2021-05-28 浙江海顺新材料有限公司 Medium-resistant low-migration easy-to-tear polyolefin film, preparation method and easy-to-tear packaging structure
CN112895650A (en) * 2021-02-23 2021-06-04 青岛东海包装产业有限公司 Polyethylene film for surface printing and compounding and preparation method thereof

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012000885A (en) * 2010-06-17 2012-01-05 Japan Polyethylene Corp Easily tearable multilayered film and packaging material
US20130245201A1 (en) * 2012-03-16 2013-09-19 King Abdulaziz City For Science And Technology Lldpe-ldpe blown film blend
JP2015182378A (en) * 2014-03-25 2015-10-22 日本ポリエチレン株式会社 Easily tearable multilayer film and packaging material, and liquid product packaging bag
CN104015439A (en) * 2014-06-05 2014-09-03 成都五牛壮达新材料有限公司 Bidirectional CPP (casting polypropylene) film easy to tear out and preparation method thereof
CA3031311A1 (en) * 2016-07-20 2018-01-25 Toyo Seikan Group Holdings, Ltd. Easy-to-tear, unstretched resin film and laminate film for packaging material using the same
CN108189506A (en) * 2018-01-16 2018-06-22 青岛东海包装产业有限公司 PE films and preparation method thereof are easily taken off in heat-sealing repeatedly
CN108276640A (en) * 2018-01-19 2018-07-13 四川厚诚新材料有限公司 One kind is two-way easily to tear curtain coating PE films and preparation method thereof
CN108773137A (en) * 2018-06-25 2018-11-09 青岛东海包装产业有限公司 Automatically it is packed for polyethylene film and preparation method thereof
CN109263200A (en) * 2018-09-30 2019-01-25 黄山永新股份有限公司 A kind of two-way linear easily tears polyethylene film and its production technology
CN109648968A (en) * 2018-12-18 2019-04-19 江门市蓬江区华龙包装材料有限公司 A kind of two-way easily tore film
CN109705446A (en) * 2018-12-27 2019-05-03 佛山佛塑科技集团股份有限公司 A kind of modified polyolefin mother material and its preparation method and application
CN110157074A (en) * 2019-05-30 2019-08-23 厦门市杏林意美包装有限公司 It is a kind of easily to tear PE membrane material and its preparation method and application
CN110281621A (en) * 2019-07-19 2019-09-27 河南省银丰塑料有限公司 A kind of polyethylene is two-way easily to tear packaging film
CN112848588A (en) * 2021-01-04 2021-05-28 浙江海顺新材料有限公司 Medium-resistant low-migration easy-to-tear polyolefin film, preparation method and easy-to-tear packaging structure
CN112895650A (en) * 2021-02-23 2021-06-04 青岛东海包装产业有限公司 Polyethylene film for surface printing and compounding and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114752134A (en) * 2022-06-15 2022-07-15 河北上东包装科技有限公司 Polyethylene easily-torn film
CN114752134B (en) * 2022-06-15 2022-09-09 河北上东包装科技有限公司 Polyethylene easily-torn film

Also Published As

Publication number Publication date
CN114030258B (en) 2024-02-06

Similar Documents

Publication Publication Date Title
CN107652670B (en) Toughened biaxially oriented polyamide film and preparation method thereof
CN110733218A (en) polyethylene film with high puncture strength and preparation method thereof
CN103879112B (en) Plastic compound flexible packaging polyethylene film and blow moiding method thereof
JP6350276B2 (en) Biaxially oriented polyamide resin film
CN111231470A (en) Multilayer co-extruded polyethylene heat shrinkable film and preparation method thereof
CN113969007B (en) Raw material for biaxially oriented high-density polyethylene film, biaxially oriented film, preparation method and application thereof
CN104608443A (en) Processing technology for heat shrinkable film
CN105172291B (en) Polyethylene film with easy straight-line tearing and preparation method for polyethylene film
CN110303748B (en) Thinner polyolefin shrink film and production process thereof
JP7372129B2 (en) Polypropylene multilayer sheet and its manufacturing method
CN109734989A (en) A kind of film and its preparation method and application
CN114030258A (en) Ultralow-strength easy-tear PE film and preparation process thereof
WO2005028553A1 (en) Resin composition and stretched film obtained by using the same
CN112356543A (en) High-gloss and high-transparency polyethylene cast film and preparation method thereof
JP4970872B2 (en) Biaxially stretched nylon film, laminate packaging material, method for producing biaxially stretched nylon film, and method for producing laminate packaging material
CN112940383A (en) Barrier material, preparation method thereof, barrier heat-resistant 180 ℃ film and composite film
CN115847976A (en) Ultrahigh-gloss ultralow-haze blow molding PE film and preparation process thereof
CN115674838A (en) Stiffness-enhanced temperature-resistant polyethylene film and preparation method and application thereof
JP6098221B2 (en) Multi-layer hollow container
WO2013099698A1 (en) Easy-to-tear laminated film and easy-to-tear packaging bag
CN112895650B (en) Polyethylene film for surface printing and compounding and preparation method thereof
JP2023044724A (en) Biaxially-oriented polyethylene thin films for thermoforming, method for producing the same, method for using the same, thermoforming method, and products
US20060135698A1 (en) Blends of medium density polyethylene with other polyolefins
CN114228288A (en) High-oxygen-resistance biaxially oriented high-density polyethylene film and preparation method thereof
KR101812888B1 (en) Resin composition of sealant film with good mechanical properties and film having the same composition

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
GR01 Patent grant
GR01 Patent grant