CN113291016A - Special packaging film of ultra-thin BOPP cigarette - Google Patents

Special packaging film of ultra-thin BOPP cigarette Download PDF

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Publication number
CN113291016A
CN113291016A CN202110485793.0A CN202110485793A CN113291016A CN 113291016 A CN113291016 A CN 113291016A CN 202110485793 A CN202110485793 A CN 202110485793A CN 113291016 A CN113291016 A CN 113291016A
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titanium dioxide
nano titanium
surface layer
packaging film
bopp
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CN202110485793.0A
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CN113291016B (en
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曾向阳
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Jiangsu Jingerun Technology Co ltd
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Jiangsu Jingerun Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/08—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the cooling method
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0036—Heat treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/46—Applications of disintegrable, dissolvable or edible materials
    • B65D65/466—Bio- or photodegradable packaging materials
    • 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
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • B32B2038/0028—Stretching, elongating
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/406—Bright, glossy, shiny surface
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/554—Wear resistance
    • 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
    • B32B2307/70—Other properties
    • B32B2307/716—Degradable
    • 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
    • B32B2307/70—Other properties
    • B32B2307/716—Degradable
    • B32B2307/7163—Biodegradable
    • 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
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/12—Polypropene
    • 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
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/14—Copolymers of propene
    • 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
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/10—Esters; Ether-esters
    • C08K5/101—Esters; Ether-esters of monocarboxylic 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
    • C08K9/00—Use of pretreated ingredients
    • C08K9/10—Encapsulated ingredients
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
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  • Physics & Mathematics (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The invention discloses an ultrathin BOPP cigarette special packaging film, which comprises an upper surface layer, a core layer and a lower surface layer; the core layer comprises the following raw materials: homo-polypropylene, a stiffening agent and a dispersing agent; the raw materials of the upper surface layer comprise: copolymer polypropylene, 3-hydroxybutyrate, a nano titanium dioxide compound, an initiator, a surfactant, an antistatic agent and a dispersant; the raw materials of the lower surface layer comprise: copolymer polypropylene, 3-hydroxybutyrate, nano titanium dioxide compound, initiator, surfactant and dispersant. The BOPP film obtained by the invention has the advantages of high degradation speed, high degradation degree, illumination and biological dual degradation, the degradation rate of 90 days is more than 90%, the improvement of the thermal shrinkage is also beneficial to improving the packaging speed of a cigarette packaging machine, the surface of the film also has a certain degree of wear resistance, and the phenomenon of film surface scratching caused by the mutual friction of the film and equipment parts is effectively reduced.

Description

Special packaging film of ultra-thin BOPP cigarette
Technical Field
The invention relates to the technical field of packaging films, in particular to an ultrathin BOPP packaging film special for cigarettes.
Background
At present, the annual dosage of various common plastic BOPP films in China is about 130-135 ten thousand tons. Mainly comprises various common BOPP films, such as BOPP printing films, paper-plastic composite films, viscose tape films and the like. Wherein the high-transparency, heat-sealable and heat-shrinkable BOPP film used for packaging small goods such as food, cigarettes, beverages, stationery and the like accounts for about 13.5-14 ten thousand tons.
The existing various BOPP films with high transparency, high gloss, heat sealability and heat shrinkage and the films for cigarette packaging have high requirements. The BOPP heat-shrinkable film has high transparency and high glossiness, can keep the fragrance of cigarettes, ensures the quality of the cigarettes, and can meet the requirements on heat sealability and the like.
However, the current packaging films for cigarettes and the like cannot be effectively degraded, the existing BOPP heat shrinkable films become discarded waste films after being unpacked, the discarded waste films are common polypropylene plastic films, and the discarded waste films are difficult to degrade and recycle in natural environment or garbage places.
The method solves the problem of treatment of the waste polypropylene plastic film, and can not destroy the ecological environment and improve the biological activity of the land after the waste polypropylene plastic film is changed into garbage, but the prior degradable plastic has the problem of slow degradation, and the resin molecular skeleton can not be decomposed for a long time, so that the difficulty is increased for the recovery treatment of the waste plastic.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides an ultrathin BOPP cigarette special packaging film.
An ultrathin BOPP cigarette-dedicated packaging film is characterized by comprising an upper surface layer, a core layer and a lower surface layer;
the raw materials of the upper surface layer comprise: copolymer polypropylene, 3-hydroxybutyrate, a nano titanium dioxide compound, an initiator, a surfactant, an antistatic agent and a dispersant;
the core layer comprises the following raw materials: homo-polypropylene, a stiffening agent and a dispersing agent;
the raw materials of the lower surface layer comprise: copolymer polypropylene, 3-hydroxybutyrate, nano titanium dioxide compound, initiator, surfactant and dispersant.
Preferably, the nano titanium dioxide compound is in a core-shell structure, the nano titanium dioxide is taken as a core, and the surface of the nano titanium dioxide is coated with the 4-vinyl guaiacol compound.
Preferably, the nano titanium dioxide composite is prepared by the following steps: adding polyvinyl alcohol and ethylene glycol into water, and stirring for 1-2h at 60-80 ℃ to obtain a mixed solution; mixing nano titanium dioxide and 4-vinyl guaiacol, adding an initiator, and uniformly stirring to obtain a mixed material; and slowly stirring the mixed solution, then dropwise adding the mixed material, continuously stirring, slowly cooling to room temperature at the stirring temperature of 60-70 ℃, filtering, washing, and drying in vacuum to obtain the nano titanium dioxide compound.
Preferably, in the step of preparing the nano titanium dioxide composite, the mass ratio of the polyvinyl alcohol to the ethylene glycol to the nano titanium dioxide to the 4-vinyl guaiacol is 2-5: 1-2: 1-5: 5-15.
Preferably, in the step of preparing the nano titanium dioxide composite, the initiator is benzoyl peroxide.
Preferably, in the raw materials of the upper surface layer, the mass ratio of the copolymer polypropylene, the 3-hydroxybutyrate, the nano titanium dioxide compound, the initiator, the surfactant, the antistatic agent and the dispersant is 100: 10-20: 5-15: 0.1-1: 1-2: 1-2: 1-2.
Preferably, in the raw materials of the lower surface layer, the mass ratio of the copolymer polypropylene, the 3-hydroxybutyrate, the nano titanium dioxide compound, the initiator, the surfactant and the dispersant is 100: 10-20: 5-15: 0.1-1: 1-2: 1-2.
Preferably, in the raw materials of the core layer, the mass ratio of the homopolymerized polypropylene to the stiffening agent to the dispersing agent is 70-80: 15-30: 2-4.
Preferably, the stiffening agent is high density polyethylene.
Preferably, the initiator is dibenzoyl peroxide.
Preferably, the surfactant is xylene.
Preferably, the thickness ratio of the upper skin layer, the core layer and the lower skin layer is 0.4 to 0.8: 14-16: 0.1-0.5.
The preparation method of the ultrathin BOPP cigarette special packaging film comprises the following steps:
s1, adding the copolymer polypropylene and the 3-hydroxybutyrate into a double-screw extruder for melting, extruding and granulating, wherein the melting temperature is 120-140 ℃, adding the granules and the residual materials into a single-screw extruder for melting and plasticizing, and the melting temperature is 180-190 ℃ to obtain an upper surface layer;
s2, adding the copolymer polypropylene and the 3-hydroxybutyrate into a double-screw extruder for melting, extruding and granulating, wherein the melting temperature is 120-140 ℃, adding the granules and the residual materials into a single-screw extruder for melting and plasticizing, and the melting temperature is 180-190 ℃ to obtain an upper surface layer;
s3, uniformly mixing the raw materials of the core layer, drying, adding the mixture into a single-screw extruder for melting and plasticizing, wherein the melting temperature is 200-220 ℃, and obtaining the core layer;
and S4, mixing and flowing out the melts of the upper surface layer, the core layer and the lower surface layer in a die head, attaching the melts to the surface of a chill roll under the action of an air knife sheet attaching device, cooling to form a solid cast sheet, and then sequentially stretching longitudinally and transversely and cooling to obtain the ultrathin BOPP cigarette special packaging film.
Preferably, the longitudinal pre-heating temperature is 95-125 ℃, the stretching temperature is 70-100 ℃, the setting temperature is 55-85 ℃ and the longitudinal stretching ratio is 4.5-7.5 in the longitudinal stretching process.
Preferably, in the transverse stretching process, the transverse preheating temperature is 170-.
The technical effects of the invention are as follows:
1. in the melt co-extrusion process of the polypropylene on the upper surface layer and the lower surface layer, 3-hydroxybutyrate is assembled on the polypropylene molecular chain, so that the polypropylene has certain biodegradability, the requirement of stretch forming can be met, the defect that other chemical modifications are easy to reduce the thermal stability is overcome, and the requirement of BOPP on biaxial stretching is met.
2. The nanometer titanium dioxide is used as a photocatalyst, has strong stability, and is easy to agglomerate; according to the invention, 4-vinyl guaiacol is used as a monomer, nano titanium dioxide particles are uniformly dispersed into the 4-vinyl guaiacol through high-speed stirring and shearing, and a carrier of nano titanium dioxide is generated by adopting an in-situ-suspension polymerization method to obtain the polymer microsphere with special degradation activity, so that the photodegradation effect is obvious, the compatibility of the nano titanium dioxide in polypropylene is enhanced, and the amplification effect on the mechanical property of the polypropylene is achieved;
however, in the polymerization reaction process, the nano effect of the nano titanium dioxide promotes the initiator to be decomposed, the reaction is accelerated and the heat is rapidly released, so that the droplets collide with each other to be bonded, the particle size is increased and the bonding phenomenon is generated, therefore, in the water phase of the system, the polyvinyl alcohol forms a monomolecular layer on the surface of the 4-vinyl guaiacol monomer droplets, the liquid is effectively prevented from being bonded, the effective collision probability in the reaction process is promoted to be increased, the balling rate is high, and the average particle size is small.
3. The nano titanium dioxide compound obtained by the invention has good compatibility with polypropylene for assembling 3-hydroxybutyrate, good film forming property of the product and good mechanical property, and after being discarded, the polypropylene for assembling 3-hydroxybutyrate is decomposed by microorganisms, macromolecular chains are broken, and the nano titanium dioxide compound absorbs ultraviolet rays, has photodegradability, promotes molecular chains to be further quickly broken and degraded, and finally is degraded, packaged and filmed into powder under the comprehensive conditions of water, oxygen, microorganisms, illumination and the like.
4. The nano titanium dioxide composite obtained by the invention has good compatibility with polypropylene for assembling 3-hydroxybutyrate, and the product has good film forming property, and the packaging film obtained by the invention can meet the performance requirements on cigarette packaging in the aspects of mechanical performance, optical performance and the like, particularly the requirements of high transparency, high gloss and the like, can replace the original BOPP packaging film, and fundamentally solves the problem that the BOPP packaging film in China can be naturally degraded.
5. The BOPP film obtained by the invention has the advantages of high degradation speed, high degradation degree, illumination and biological dual degradation, the degradation rate of 90 days is more than 90%, the improvement of the thermal shrinkage is also beneficial to improving the packaging speed of a cigarette packaging machine, the surface of the film also has a certain degree of wear resistance, and the phenomenon of film surface scratching caused by the mutual friction of the film and equipment parts is effectively reduced.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Example 1
An ultrathin BOPP cigarette-dedicated packaging film comprises an upper surface layer with the thickness of 0.4 mu m, a core layer with the thickness of 16 mu m and a lower surface layer with the thickness of 0.1 mu m;
the raw materials of the upper surface layer comprise: 100kg of copolymer polypropylene, 20kg of 3-hydroxybutyrate, 5kg of nano titanium dioxide compound, 1kg of dibenzoyl peroxide, 1kg of dimethylbenzene, 2kg of antistatic agent and 1kg of dispersing agent;
the core layer comprises the following raw materials: 80kg of homopolymerized polypropylene, 15kg of high-density polyethylene and 4kg of dispersing agent;
the raw materials of the lower surface layer comprise: 100kg of copolymer polypropylene, 10kg of 3-hydroxybutyrate, 15kg of nano titanium dioxide compound, 0.1kg of dibenzoyl peroxide, 2kg of dimethylbenzene and 1kg of dispersant;
the nano titanium dioxide compound is prepared by the following steps: adding 5kg of polyvinyl alcohol and 1kg of ethylene glycol into 50kg of water, and stirring for 2 hours at 60 ℃ to obtain a mixed solution; mixing 1kg of nano titanium dioxide and 15kg of 4-vinyl guaiacol, stirring at a high speed of 6000r/min for 10min, and adding 0.1kg of benzoyl peroxide to obtain a mixed material; slowly stirring the mixed solution, then dropwise adding the mixed material, continuously stirring for 10h at the stirring speed of 50r/min and the stirring temperature of 70 ℃, slowly cooling to room temperature, filtering, washing the solid with deionized water for 1 time, and drying in vacuum to obtain the nano titanium dioxide compound.
The preparation method of the ultrathin BOPP cigarette special packaging film comprises the following steps:
s1, adding the copolymer polypropylene and the 3-hydroxybutyrate into a double-screw extruder for melting, extruding and granulating, wherein the melting temperature is 140 ℃, adding the granules and the rest materials into a single-screw extruder for melting and plasticizing, and the melting temperature is 180 ℃ to obtain an upper surface layer;
s2, adding the copolymer polypropylene and the 3-hydroxybutyrate into a double-screw extruder for melting, extruding and granulating, wherein the melting temperature is 140 ℃, adding the granules and the rest materials into a single-screw extruder for melting and plasticizing, and the melting temperature is 180 ℃ to obtain an upper surface layer;
s3, uniformly mixing the core layer raw materials, drying, adding into a single-screw extruder, and performing melt plasticizing at the melting temperature of 220 ℃ to obtain a core layer;
s4, mixing and flowing out the melts of the upper surface layer, the core layer and the lower surface layer in a die head, attaching the melts to the surface of a chill roll under the action of an air knife attaching device, cooling to form a solid cast sheet, and then sequentially stretching longitudinally and transversely, wherein in the longitudinal stretching process, the longitudinal preheating temperature is 95 ℃, the stretching temperature is 100 ℃, the setting temperature is 55 ℃, and the longitudinal stretching ratio is 7.5; in the transverse stretching process, the transverse preheating temperature is 170 ℃, the stretching temperature is 160 ℃, the setting temperature is 125 ℃, and the transverse stretching ratio is 10; and then cooling to obtain the ultrathin BOPP cigarette special packaging film.
Example 2
An ultrathin BOPP cigarette-dedicated packaging film comprises an upper surface layer with the thickness of 0.8 mu m, a core layer with the thickness of 14 mu m and a lower surface layer with the thickness of 0.5 mu m;
the raw materials of the upper surface layer comprise: 100kg of copolymer polypropylene, 10kg of 3-hydroxybutyrate, 15kg of nano titanium dioxide compound, 0.1kg of dibenzoyl peroxide, 2kg of dimethylbenzene, 1kg of antistatic agent and 2kg of dispersing agent;
the core layer comprises the following raw materials: 70kg of homopolymerized polypropylene, 30kg of high-density polyethylene and 2kg of dispersing agent;
the raw materials of the lower surface layer comprise: 100kg of copolymer polypropylene, 20kg of 3-hydroxybutyrate, 5kg of nano titanium dioxide compound, 1kg of dibenzoyl peroxide, 1kg of dimethylbenzene and 2kg of dispersant;
the nano titanium dioxide compound is prepared by the following steps: adding 2kg of polyvinyl alcohol and 2kg of ethylene glycol into 20kg of water, and stirring for 1h at 80 ℃ to obtain a mixed solution; mixing 5kg of nano titanium dioxide and 5kg of 4-vinyl guaiacol, stirring at a high speed of 4000r/min for 20min, and adding 1kg of benzoyl peroxide to obtain a mixed material; slowly stirring the mixed solution, then dropwise adding the mixed material, continuously stirring for 5h at the stirring speed of 150r/min and the stirring temperature of 60 ℃, slowly cooling to room temperature, filtering, washing the solid with deionized water for 3 times, and drying in vacuum to obtain the nano titanium dioxide compound.
The preparation method of the ultrathin BOPP cigarette special packaging film comprises the following steps:
s1, adding the copolymer polypropylene and the 3-hydroxybutyrate into a double-screw extruder for melting, extruding and granulating, wherein the melting temperature is 120 ℃, adding the granules and the rest material into a single-screw extruder for melting and plasticizing, and the melting temperature is 190 ℃ to obtain an upper surface layer;
s2, adding the copolymer polypropylene and the 3-hydroxybutyrate into a double-screw extruder for melting, extruding and granulating, wherein the melting temperature is 120 ℃, adding the granules and the rest material into a single-screw extruder for melting and plasticizing, and the melting temperature is 190 ℃ to obtain an upper surface layer;
s3, uniformly mixing the core layer raw materials, drying, adding into a single-screw extruder, and performing melt plasticizing at the melting temperature of 200 ℃ to obtain a core layer;
s4, mixing and flowing out the melts of the upper surface layer, the core layer and the lower surface layer in a die head, attaching the melts to the surface of a chill roll under the action of an air knife attaching device, cooling to form a solid cast sheet, and then sequentially stretching longitudinally and transversely, wherein in the longitudinal stretching process, the longitudinal preheating temperature is 125 ℃, the stretching temperature is 70 ℃, the setting temperature is 85 ℃, and the longitudinal stretching ratio is 4.5; in the transverse stretching process, the transverse preheating temperature is 200 ℃, the stretching temperature is 130 ℃, the setting temperature is 155 ℃, and the transverse stretching ratio is 8; and then cooling to obtain the ultrathin BOPP cigarette special packaging film.
Example 3
An ultrathin BOPP cigarette-dedicated packaging film comprises an upper surface layer with the thickness of 0.5 mu m, a core layer with the thickness of 15.5 mu m and a lower surface layer with the thickness of 0.2 mu m;
the raw materials of the upper surface layer comprise: 100kg of copolymer polypropylene, 18kg of 3-hydroxybutyrate, 8kg of nano titanium dioxide compound, 0.8kg of dibenzoyl peroxide, 1.3kg of dimethylbenzene, 1.8kg of antistatic agent and 1.3kg of dispersing agent;
the core layer comprises the following raw materials: 77kg of homopolymerized polypropylene, 20kg of high-density polyethylene and 3.5kg of dispersing agent;
the raw materials of the lower surface layer comprise: 100kg of copolymer polypropylene, 12kg of 3-hydroxybutyrate, 12kg of nano titanium dioxide compound, 0.3kg of dibenzoyl peroxide, 1.7kg of dimethylbenzene and 1.2kg of dispersant;
the nano titanium dioxide compound is prepared by the following steps: adding 4kg of polyvinyl alcohol and 1.3kg of ethylene glycol into 40kg of water, and stirring for 1.7h at 65 ℃ to obtain a mixed solution; mixing 2kg of nano titanium dioxide and 12kg of 4-vinyl guaiacol, stirring at a high speed of 5500r/min for 13min, and adding 0.3kg of benzoyl peroxide to obtain a mixed material; slowly stirring the mixed solution, then dropwise adding the mixed material, continuously stirring for 8h at the stirring speed of 80r/min and the stirring temperature of 66 ℃, slowly cooling to room temperature, filtering, washing the solid with deionized water for 2 times, and drying in vacuum to obtain the nano titanium dioxide compound.
The preparation method of the ultrathin BOPP cigarette special packaging film comprises the following steps:
s1, adding the copolymer polypropylene and the 3-hydroxybutyrate into a double-screw extruder for melting, extruding and granulating, wherein the melting temperature is 125 ℃, adding the granules and the rest material into a single-screw extruder for melting and plasticizing, and the melting temperature is 188 ℃ to obtain an upper surface layer;
s2, adding the copolymer polypropylene and the 3-hydroxybutyrate into a double-screw extruder for melting, extruding and granulating, wherein the melting temperature is 125 ℃, adding the granules and the rest material into a single-screw extruder for melting and plasticizing, and the melting temperature is 188 ℃ to obtain an upper surface layer;
s3, uniformly mixing the core layer raw materials, drying, adding the mixture into a single-screw extruder, and performing melt plasticizing at the melting temperature of 205 ℃ to obtain a core layer;
s4, mixing and flowing out the melts of the upper surface layer, the core layer and the lower surface layer in a die head, attaching the melts to the surface of a chill roll under the action of an air knife sheet attaching device, cooling to form a solid cast sheet, and then sequentially stretching longitudinally and transversely, wherein in the longitudinal stretching process, the longitudinal preheating temperature is 120 ℃, the stretching temperature is 80 ℃, the setting temperature is 75 ℃, and the longitudinal stretching ratio is 5.5; in the transverse stretching process, the transverse preheating temperature is 195 ℃, the stretching temperature is 140 ℃, the setting temperature is 145 ℃, and the transverse stretching ratio is 8.5; and then cooling to obtain the ultrathin BOPP cigarette special packaging film.
Example 4
An ultrathin BOPP cigarette-dedicated packaging film comprises an upper surface layer with the thickness of 0.7 mu m, a core layer with the thickness of 14.5 mu m and a lower surface layer with the thickness of 0.4 mu m;
the raw materials of the upper surface layer comprise: 100kg of copolymer polypropylene, 12kg of 3-hydroxybutyrate, 12kg of nano titanium dioxide compound, 0.2kg of dibenzoyl peroxide, 1.7kg of dimethylbenzene, 1.2kg of antistatic agent and 1.7kg of dispersing agent;
the core layer comprises the following raw materials: 73kg of homopolymerized polypropylene, 25kg of high-density polyethylene and 2.5kg of dispersing agent;
the raw materials of the lower surface layer comprise: 100kg of copolymer polypropylene, 18kg of 3-hydroxybutyrate, 8kg of nano titanium dioxide compound, 0.7kg of dibenzoyl peroxide, 1.3kg of dimethylbenzene and 1.8kg of dispersant;
the nano titanium dioxide compound is prepared by the following steps: adding 3kg of polyvinyl alcohol and 1.7kg of ethylene glycol into 30kg of water, and stirring for 1.3h at 75 ℃ to obtain a mixed solution; mixing 4kg of nano titanium dioxide and 8kg of 4-vinyl guaiacol, stirring at a high speed of 4500r/min for 17min, and adding 0.7kg of benzoyl peroxide to obtain a mixture; slowly stirring the mixed solution, then dropwise adding the mixed material, continuously stirring for 6h at the stirring speed of 120r/min and the stirring temperature of 64 ℃, slowly cooling to room temperature, filtering, washing the solid with deionized water for 2 times, and drying in vacuum to obtain the nano titanium dioxide compound.
The preparation method of the ultrathin BOPP cigarette special packaging film comprises the following steps:
s1, adding the copolymer polypropylene and the 3-hydroxybutyrate into a double-screw extruder for melting, extruding and granulating, wherein the melting temperature is 135 ℃, adding the granules and the rest materials into a single-screw extruder for melting and plasticizing, and the melting temperature is 182 ℃ to obtain an upper surface layer;
s2, adding the copolymer polypropylene and the 3-hydroxybutyrate into a double-screw extruder for melting, extruding and granulating, wherein the melting temperature is 135 ℃, adding the granules and the rest materials into a single-screw extruder for melting and plasticizing, and the melting temperature is 182 ℃ to obtain an upper surface layer;
s3, uniformly mixing the core layer raw materials, drying, adding the mixture into a single-screw extruder for melting and plasticizing, wherein the melting temperature is 215 ℃, and obtaining a core layer;
s4, mixing and flowing out the melts of the upper surface layer, the core layer and the lower surface layer in a die head, attaching the melts to the surface of a chill roll under the action of an air knife attaching device, cooling to form a solid cast sheet, and then sequentially stretching longitudinally and transversely, wherein in the longitudinal stretching process, the longitudinal preheating temperature is 100 ℃, the stretching temperature is 90 ℃, the setting temperature is 65 ℃, and the longitudinal stretching ratio is 6.5; in the transverse stretching process, the transverse preheating temperature is 175 ℃, the stretching temperature is 150 ℃, the setting temperature is 135 ℃, and the transverse stretching ratio is 9.5; and then cooling to obtain the ultrathin BOPP cigarette special packaging film.
Example 5
An ultrathin BOPP cigarette-dedicated packaging film comprises an upper surface layer with the thickness of 0.6 mu m, a core layer with the thickness of 15 mu m and a lower surface layer with the thickness of 0.3 mu m;
the raw materials of the upper surface layer comprise: 100kg of copolymer polypropylene, 15kg of 3-hydroxybutyrate, 10kg of nano titanium dioxide compound, 0.5kg of dibenzoyl peroxide, 1.5kg of dimethylbenzene, 1.5kg of antistatic agent and 1.5kg of dispersing agent;
the core layer comprises the following raw materials: 75kg of homopolymerized polypropylene, 23kg of high-density polyethylene and 3kg of dispersing agent;
the raw materials of the lower surface layer comprise: 100kg of copolymer polypropylene, 15kg of 3-hydroxybutyrate, 10kg of nano titanium dioxide compound, 0.5kg of dibenzoyl peroxide, 1.5kg of dimethylbenzene and 1.5kg of dispersant;
the nano titanium dioxide compound is prepared by the following steps: adding 3.5kg of polyvinyl alcohol and 1.5kg of ethylene glycol into 35kg of water, and stirring for 1.5h at 70 ℃ to obtain a mixed solution; mixing 3kg of nano titanium dioxide and 10kg of 4-vinyl guaiacol, stirring at a high speed of 5000r/min for 15min, and adding 0.5kg of benzoyl peroxide to obtain a mixture; slowly stirring the mixed solution, then dropwise adding the mixed material, continuously stirring for 7h at the stirring speed of 100r/min and the stirring temperature of 65 ℃, slowly cooling to room temperature, filtering, washing the solid with deionized water for 2 times, and drying in vacuum to obtain the nano titanium dioxide compound.
The preparation method of the ultrathin BOPP cigarette special packaging film comprises the following steps:
s1, adding the copolymer polypropylene and the 3-hydroxybutyrate into a double-screw extruder for melting, extruding and granulating, wherein the melting temperature is 130 ℃, adding the granules and the rest material into a single-screw extruder for melting and plasticizing, and the melting temperature is 185 ℃ to obtain an upper surface layer;
s2, adding the copolymer polypropylene and the 3-hydroxybutyrate into a double-screw extruder for melting, extruding and granulating, wherein the melting temperature is 130 ℃, adding the granules and the rest material into a single-screw extruder for melting and plasticizing, and the melting temperature is 185 ℃ to obtain an upper surface layer;
s3, uniformly mixing the raw materials of the core layer, drying, adding the mixture into a single-screw extruder, and performing melt plasticizing at the melting temperature of 210 ℃ to obtain the core layer;
s4, mixing and flowing out the melts of the upper surface layer, the core layer and the lower surface layer in a die head, attaching the melts to the surface of a chill roll under the action of an air knife sheet attaching device, cooling to form a solid cast sheet, and then sequentially stretching longitudinally and transversely, wherein in the longitudinal stretching process, the longitudinal preheating temperature is 110 ℃, the stretching temperature is 85 ℃, the setting temperature is 70 ℃, and the longitudinal stretching ratio is 6; in the transverse stretching process, the transverse preheating temperature is 185 ℃, the stretching temperature is 145 ℃, the setting temperature is 140 ℃ and the transverse stretching ratio is 9; and then cooling to obtain the ultrathin BOPP cigarette special packaging film.
The ultra-thin BOPP cigarette packaging films obtained in examples 3 to 5 were subjected to mechanical property tests, and the results were as follows:
example 3 Example 4 Example 5
Tensile Strength (longitudinal), N/mm2 193.38 186.52 198.47
Tensile Strength (transverse), N/mm2 290.12 285.37 294.55
Elongation at break (longitudinal direction)% 126.57 133.41 137.42
Elongation at break (transverse)% 60.31 65.44 62.39
Thermal shrinkage (longitudinal direction)% 10.1 10.3 9.2
Thermal shrinkage (transverse direction)% 9.6 9.2 9.4
Gloss,% of 0.7 0.7 0.8
Coefficient of friction 0.163 0.159 0.171
Heat seal Strength, N/15mm 3.66 3.92 3.75
Because the BOPP film obtained by the invention is of a three-layer co-extrusion composite structure, the upper surface layer mainly shows the functions of smoothness, adhesion resistance and heat sealing, the core layer mainly shows the characteristics of the film, and the lower surface layer mainly shows the heat sealing function. The thickness of the upper surface layer and the lower surface layer is correspondingly increased and decreased along with the thickness change of the film, so that the heat sealing effect of the film in the cigarette packaging machine during quick heat sealing is favorably ensured.
The property of a plastic film that changes its mechanical properties (especially the retention of elongation at break) with the time of illumination under light is often used to characterize the photodegradation properties of the film, and when the retention of elongation at break of the film is less than 5%, the film is considered to have completely degraded.
The ultra-thin BOPP cigarette packaging films obtained in the examples 3 to 5 are placed in an indoor accelerated degradation experimental device (meeting the requirements of GB/T16422.2-2014) for accelerated test, and the results are as follows:
example 3 Example 4 Example 5
20h elongation at break retention% 41.36 42.57 44.92
Retention of elongation at break of 40 h% 27.64 29.35 25.41
Retention of elongation at break for 60 h% 12.48 11.37 10.26
80h elongation at break retention% 4.92 4.36 3.95
The above table confirms that: the ultrathin BOPP cigarette special packaging film obtained by the invention is completely degraded after being irradiated for 80 h.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (10)

1. An ultrathin BOPP cigarette-dedicated packaging film is characterized by comprising an upper surface layer, a core layer and a lower surface layer;
the core layer comprises the following raw materials: homo-polypropylene, a stiffening agent and a dispersing agent;
the raw materials of the upper surface layer comprise: copolymer polypropylene, 3-hydroxybutyrate, a nano titanium dioxide compound, an initiator, a surfactant, an antistatic agent and a dispersant;
the raw materials of the lower surface layer comprise: copolymer polypropylene, 3-hydroxybutyrate, nano titanium dioxide compound, initiator, surfactant and dispersant.
2. The ultra-thin BOPP cigarette-dedicated packaging film of claim 1, wherein the nano titanium dioxide compound is of a core-shell structure, the nano titanium dioxide is used as a core, and the surface of the nano titanium dioxide is coated with the 4-vinyl guaiacol compound.
3. The ultra-thin BOPP packaging film for cigarettes according to claim 2, wherein the nano titanium dioxide composite is prepared by the following steps: adding polyvinyl alcohol and ethylene glycol into water, and stirring for 1-2h at 60-80 ℃ to obtain a mixed solution; mixing nano titanium dioxide and 4-vinyl guaiacol, adding an initiator, and uniformly stirring to obtain a mixed material; and slowly stirring the mixed solution, then dropwise adding the mixed material, continuously stirring, slowly cooling to room temperature at the stirring temperature of 60-70 ℃, filtering, washing, and drying in vacuum to obtain the nano titanium dioxide compound.
4. The ultrathin BOPP packaging film special for cigarettes as claimed in claim 3, wherein in the preparation step of the nano titanium dioxide composite, the mass ratio of polyvinyl alcohol, ethylene glycol, nano titanium dioxide and 4-vinyl guaiacol is 2-5: 1-2: 1-5: 5-15.
5. The ultra-thin BOPP cigarette-dedicated packaging film of claim 3, wherein in the step of preparing the nano titanium dioxide composite, the initiator is benzoyl peroxide.
6. The ultrathin BOPP packaging film special for cigarettes as claimed in claim 1, wherein the raw materials of the upper surface layer comprise copolymer polypropylene, 3-hydroxybutyrate, nano titanium dioxide compound, initiator, surfactant, antistatic agent and dispersant in a mass ratio of 100: 10-20: 5-15: 0.1-1: 1-2: 1-2: 1-2.
7. The ultrathin BOPP packaging film special for cigarettes as claimed in claim 1, wherein the raw materials of the lower surface layer comprise copolymer polypropylene, 3-hydroxybutyrate, nano titanium dioxide compound, initiator, surfactant and dispersant in a mass ratio of 100: 10-20: 5-15: 0.1-1: 1-2: 1-2.
8. The ultrathin BOPP packaging film special for cigarettes as claimed in claim 1, wherein the raw materials of the core layer comprise homopolypropylene, a stiffening agent and a dispersing agent in a mass ratio of 70-80: 15-30: 2-4.
9. The ultra-thin BOPP cigarette-specific packaging film according to claim 1, wherein the initiator is dibenzoyl peroxide; preferably, the surfactant is xylene; preferably, the stiffening agent is high density polyethylene.
10. The ultra-thin BOPP packaging film for cigarettes according to claim 1, wherein the thickness ratio of the upper surface layer, the core layer and the lower surface layer is 0.4 to 0.8: 14-16: 0.1-0.5.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101885669A (en) * 2010-07-17 2010-11-17 天津市化学试剂研究所 Preparation method of 4-vinyl guaiacol
CN102079155A (en) * 2010-08-26 2011-06-01 湛江包装材料企业有限公司 BOPP thin film of hard-box cigarette package special for super-high speed cigarette packer
CN104212059A (en) * 2014-08-27 2014-12-17 安徽国风塑业股份有限公司 Biodegradable master batch and biodegradable BOPP (Biaxially Oriented Polypropylene) film containing biodegradable master batch
CN110305258A (en) * 2019-07-10 2019-10-08 浙江理工大学 A kind of diluent and unsaturated polyester composite based on ferulic acid derivative

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101885669A (en) * 2010-07-17 2010-11-17 天津市化学试剂研究所 Preparation method of 4-vinyl guaiacol
CN102079155A (en) * 2010-08-26 2011-06-01 湛江包装材料企业有限公司 BOPP thin film of hard-box cigarette package special for super-high speed cigarette packer
CN104212059A (en) * 2014-08-27 2014-12-17 安徽国风塑业股份有限公司 Biodegradable master batch and biodegradable BOPP (Biaxially Oriented Polypropylene) film containing biodegradable master batch
CN110305258A (en) * 2019-07-10 2019-10-08 浙江理工大学 A kind of diluent and unsaturated polyester composite based on ferulic acid derivative

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