WO2022247061A1 - 再生ps塑料薄膜、声磁防盗标签、标签外壳及其制备方法 - Google Patents

再生ps塑料薄膜、声磁防盗标签、标签外壳及其制备方法 Download PDF

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WO2022247061A1
WO2022247061A1 PCT/CN2021/117613 CN2021117613W WO2022247061A1 WO 2022247061 A1 WO2022247061 A1 WO 2022247061A1 CN 2021117613 W CN2021117613 W CN 2021117613W WO 2022247061 A1 WO2022247061 A1 WO 2022247061A1
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Prior art keywords
plastic film
plastic
regenerated
film
recycled
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PCT/CN2021/117613
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English (en)
French (fr)
Inventor
张曙
虞丽京
廖娜
杨梅
Original Assignee
宁波讯强电子科技有限公司
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Priority claimed from CN202110845386.6A external-priority patent/CN113698682A/zh
Application filed by 宁波讯强电子科技有限公司 filed Critical 宁波讯强电子科技有限公司
Publication of WO2022247061A1 publication Critical patent/WO2022247061A1/zh
Priority to US18/520,591 priority Critical patent/US20240093017A1/en

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/06—Polystyrene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • 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
    • B32B1/00—Layered products having a general shape other than plane
    • 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
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • C—CHEMISTRY; METALLURGY
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    • 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
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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    • C08K9/04—Ingredients treated with organic substances
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    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2422—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using acoustic or microwave tags
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
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    • G08B13/2428—Tag details
    • G08B13/2434—Tag housing and attachment details
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G08B13/2442—Tag materials and material properties thereof, e.g. magnetic material details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
    • B29K2025/04—Polymers of styrene
    • B29K2025/06—PS, i.e. polystyrene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0088—Blends of polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/26—Scrap or recycled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/744—Labels, badges, e.g. marker sleeves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/02—2 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/246—All polymers belonging to those covered by groups B32B27/32 and B32B27/30
    • 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
    • B32B2272/00—Resin or rubber layer comprising scrap, waste or recycling material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • 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
    • C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
    • C08J2325/02—Homopolymers or copolymers of hydrocarbons
    • C08J2325/04—Homopolymers or copolymers of styrene
    • C08J2325/06—Polystyrene
    • 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
    • C08J2409/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
    • C08J2409/06—Copolymers with styrene
    • 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
    • C08J2453/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • C08J2453/02—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers of vinyl aromatic monomers and conjugated dienes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/16—Applications used for films
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/20—Recycled plastic

Definitions

  • the invention relates to the field of material technology, in particular to a recycled PS plastic film, an acoustic-magnetic anti-theft label, a label shell and a preparation method thereof.
  • the acoustomagnetic anti-theft label is generally composed of plastic shell (mainly composed of polystyrene (Polystyrene, PS) film)/polyethylene (polyethylene, PE), non-wafer, semi-hard magnetic sheet, PE/polyethylene terephthalate Polyethyleneglycol Terephthalate (PET) sealing cover materials, self-adhesive stickers and other multi-layer structures, which are disposable consumables that are in great demand, are mainly used for anti-theft in retail supermarkets, shopping malls, chain stores and other places around the world. The annual consumption is as high as tens of billions of tablets.
  • the acousto-magnetic anti-theft label is mainly attached to the product packaging.
  • the customer After the customer selects the product, he can pay for degaussing at the cash register. If the thief does not pay and tries to take the product out of the store, the label will trigger an alarm when the product passes the door. Achieve anti-theft effect. After the customer pays, the cashier will demagnetize the label and decode it, and the alarm will no longer be triggered when the product is taken out of the store. This is an important anti-theft measure for open-shelf sales in the retail industry. The PS in the discarded label cannot be recycled, and it is easy to pollute the environment. With the introduction of "plastic restriction orders" in various countries, merchants need to have an acoustomagnetic label that uses a certain degree of recycled plastics to complete the ever-increasing environmental protection tasks.
  • the PS plastic shell of the acoustomagnetic anti-theft label has certain requirements for fluidity, bending strength, impact strength, elongation at break and other mechanical properties and stability.
  • some recycled PS masterbatches have appeared on the market, but most of these materials are recycled from rigid thick sheet products (originally high-impact polystyrene HIPS) (such as waste TV casings), due to its thick sheet It is easy to be brittle and broken, so ordinary technicians would not think of using it to make a non-brittle film roll with a thickness of 0.20-0.45mm.
  • the purpose of the embodiments of the present invention is to overcome the aforementioned technical pain points, and provide a recycled PS plastic film, an acoustic-magnetic anti-theft label, a label casing and a preparation method thereof, which can use waste PS plastics to prepare recycled PS plastic films to save resources and meet The majority of customers have an urgent need for environmentally friendly and green acoustomagnetic anti-theft labels.
  • an embodiment of the present invention provides a recycled PS plastic film, including waste PS plastic, and the content of the waste PS plastic is 100% based on the total weight of the recycled PS plastic film.
  • an embodiment of the present invention also provides a recycled PS plastic film, including waste PS plastic and modified materials, based on the total weight of the recycled PS plastic film, the content of the waste PS plastic is greater than or equal to 1% and less than 100%, the content of the modified material is greater than 0% and less than or equal to 99%.
  • the content of the waste PS plastic is 10-76%, and the content of the modified material is 24-90%.
  • the modified material includes at least one of virgin material PS and additives.
  • the auxiliary agent includes a toughening agent.
  • the toughening agent includes at least one of SBS and SBR.
  • the auxiliary agent also includes OMMT
  • the toughening agent is SBS; based on the total weight of the recycled PS plastic film, the content of SBS is greater than 0% and less than or equal to 25%, and the content of OMMT is greater than 0%. And less than or equal to 6%.
  • the content of SBS is 20%, and the content of OMMT is 4%.
  • the auxiliary agent also includes OMMT, and the toughening agent is SBR; based on the total weight of the recycled PS plastic film, the content of SBR is 25-35%, and the content of OMMT is 2-6%.
  • the content of SBR is 30%, and the content of OMMT is 4%.
  • the auxiliary agent also includes OMMT
  • the toughening agent includes SBS and SBR; based on the total weight of the regenerated PS plastic film, the content of SBS is greater than 0% and less than or equal to 25%, and the content of SBR is greater than 0% and less than or equal to 35%, the content of OMMT is greater than 0% and less than or equal to 6%, and the total content of the SBS, SBR and OMMT is less than or equal to 60%.
  • the recycled PS plastic is recycled HIPS plastic
  • the waste PS plastic is waste HIPS plastic
  • an embodiment of the present invention also provides a method for preparing the recycled PS plastic film, including:
  • the granulated waste PS plastic is made into a film to obtain a recycled PS plastic film; wherein, based on the total weight of the recycled PS plastic film, the content of the waste PS plastic is 100%.
  • the said granulated waste PS plastic is made into a film to obtain a recycled PS plastic film, which specifically includes:
  • the granulated waste PS plastic is made into a film by using an extrusion tape casting process or a blown film forming process to obtain a regenerated PS plastic film.
  • an embodiment of the present invention also provides a method for preparing the recycled PS plastic film, including:
  • the content of the waste PS plastic is greater than or equal to 1% and less than 100%, and the content of the modified material is greater than 0% and less than or equal to 99%.
  • the regenerated PS plastic is made into a film to obtain a regenerated PS plastic film, which specifically includes:
  • the regenerated PS plastic is made into a film by an extrusion casting process or a blown film forming process to obtain a regenerated PS plastic film.
  • At least one of antistatic agent, flame retardant and colorant is added.
  • an embodiment of the present invention also provides an acoustomagnetic anti-theft label housing, which includes a sealing layer and the regenerated PS plastic film, and the regenerated PS plastic film is laminated with the sealing layer.
  • the thickness of the recycled PS plastic film is 0.20-0.45mm.
  • the shell of the acoustic-magnetic anti-theft tag has a thickness of 0.23-0.45mm.
  • the sealing layer is a PE film or a PP film.
  • the material of the sealing layer includes 1-100% recycled PE film, or the material of the sealing layer includes 1-100% recycled PP film.
  • an embodiment of the present invention also provides a method for preparing the shell of the acoustomagnetic anti-theft tag, including:
  • a sealing layer is arranged on the regenerated PS plastic film to obtain an acoustic magnetic anti-theft label shell material; wherein, the regenerated PS plastic film is prepared by the method for preparing the regenerated PS plastic film;
  • the casing material of the acoustic-magnetic anti-theft tag is used to make the casing of the acoustic-magnetic anti-theft tag.
  • the sealing layer is a PE film; the sealing layer is set on the regenerated PS plastic film to obtain the shell material of the acoustic-magnetic anti-theft label, which specifically includes:
  • the composite film is made into the shell of the acoustic-magnetic anti-theft soft label by using a thermoforming process at 50-80°C; wherein, the thermoforming process is a blister forming process or a concave-convex upper and lower mold compression molding process.
  • an embodiment of the present invention also provides an acoustomagnetic anti-theft tag, including the casing of the acoustomagnetic anti-theft tag.
  • the acoustomagnetic anti-theft label also includes at least one resonant sheet, a sealing cover, a bias sheet, double-sided adhesive tape and a separation tape, and the sealing layer of the acoustomagnetic anti-theft label shell is connected to the sealing cover , there is a cavity between the sealing layer and the sealing cover, the resonant plate is accommodated in the cavity, and one side of the double-sided adhesive fixes the bias plate on the sealing On the cover, the other side of the double-sided adhesive is connected with the separation tape.
  • the notched impact strength of the recycled PS plastic is 5.7-17.0KJ/m 2
  • the thickness of the recycled PS plastic film is 0.20-0.38mm.
  • the film strip when cutting out a 2 mm wide film strip with the shell of the acoustic-magnetic anti-theft label, the film strip is completely folded in half along the length direction of the film strip and then unfolded without brittle fracture.
  • the beneficial effect of the embodiment of the present invention is that the embodiment of the present invention provides a recycled PS plastic film, which is made of 100% waste PS plastic, or made of waste PS plastic and modified materials. wherein, the content of waste PS plastics is greater than or equal to 1% and less than 100%, and the content of modified materials is greater than or equal to 0% and less than or equal to 99%.
  • Various embodiments of the present invention use waste and old PS plastics to prepare recycled PS plastic films, which can save resources, more environmentally friendly.
  • the modified materials are used to modify the waste PS plastic to improve the performance of the plastic, which is beneficial to the preparation of the shell of the acoustomagnetic anti-theft label with good performance.
  • the embodiments of the present invention also provide a method for preparing a recycled PS plastic film, an acoustomagnetic anti-theft label shell, a method for preparing an acoustomagnetic anti-theft label shell, and an acoustomagnetic anti-theft label.
  • Fig. 1 is a schematic structural view of an acoustomagnetic anti-theft tag in an embodiment of the present invention
  • Fig. 2 is the preparation process flowchart of the regenerated PS plastic film in the embodiment of the present invention
  • the recycled PS plastic film includes waste PS plastic, and the content of the waste PS plastic is 100% based on the total weight of the recycled PS plastic film.
  • the recycled PS plastic film is made of 100% waste PS plastic, and the waste PS plastic is used to the greatest extent to prepare the recycled PS plastic film, so as to save as much resources as possible, and can be used to prepare a sound-magnetic anti-theft label shell with good performance .
  • the recycled PS plastic is recycled HIPS plastic
  • the waste PS plastic is waste HIPS plastic
  • the inventors when the inventors used 100% rigid waste PS thick plate plastics to melt and form films, they found that flexible 0.20-0.45mm films could be successfully made without Brittle fracture occurs as in thick plates, so the 0.20-0.45mm regenerated PS of the present invention can be directly used as the shell of the acoustic magnetic anti-theft label without modification without brittle fracture, producing unexpected technical effects.
  • an embodiment of the present invention also provides a method for preparing a recycled PS plastic film, including:
  • the granulated waste PS plastic is made into a film to obtain a recycled PS plastic film; wherein, based on the total weight of the recycled PS plastic film, the content of the waste PS plastic is 100%.
  • PS can be separated from other materials by infrared or density separation , in order to obtain pure PS recycling, which is convenient for subsequent regeneration and modified regeneration.
  • the recovered waste TV casing plastics can be crushed, washed, separated, dried, etc. to obtain waste PS plastics.
  • the step of making the granulated waste PS plastic into a film to obtain the regenerated PS plastic film specifically includes: making the granulated waste PS plastic into a film by using an extrusion tape casting process or a blown film forming process, Get recycled PS plastic film.
  • the thickness of the recycled PS plastic film is 0.20-0.45mm.
  • the recycled PS plastic film includes waste PS plastic and modified materials, based on the total weight of the recycled PS plastic film, the content of the waste PS plastic is greater than or equal to 1% and less than 100%.
  • the content of the modified material is greater than 0% and less than or equal to 99%.
  • the recycled PS plastic film is made of waste PS plastics and modified materials, wherein the content of waste PS plastics is greater than or equal to 1% and less than 100%, and the content of modified materials is greater than or equal to 0% and less than or equal to 99%. %, making full use of waste PS plastics to prepare recycled PS plastic films, thereby saving more resources as much as possible.
  • the waste and old PS plastic can be modified by adding modified materials, which is conducive to the preparation of a sound-magnetic anti-theft label shell with good performance.
  • the content of waste PS plastics is greater than or equal to 1% and less than 100%, such as 1%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 41% %, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 60%, 65%, 70%, 73%, 76%, 80%, 82%, 85%, 88%, 90%, 92%, 95%, 99%, etc., the specific content can be based on actual requirements Set it up, so I won’t go into details here.
  • the content of the modified material is greater than 0% and less than or equal to 99%, for example, it can be 1%, 5%, 10%, 15%, 20%, 24%, 25%, 26%, 30%, 35%, 40% , 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 99%, etc.
  • the specific content can be set according to actual requirements, and will not be changed here Too much to repeat.
  • the content of the waste PS plastic is 10-76%, and the content of the modified material is 24-90%.
  • the modified material includes at least one of virgin PS and additives.
  • the auxiliary agent includes a toughening agent.
  • the toughening agent includes at least one of SBS and SBR.
  • SBS and SBR are good toughening agents, and because SBS, SBR and waste PS plastic molecular chains all contain styrene units, the toughening agent SBR and SBS have the same effect as waste PS plastics.
  • the additive can also include OMMT, use OMMT to modify waste PS plastics, improve the impact strength and tensile strength of plastics , bending strength and fluidity, which is conducive to the preparation of a sound-magnetic anti-theft label shell with good performance.
  • the toughening agent is SBS (ie styrene-butadiene-styrene block copolymer); based on the total weight of the regenerated PS plastic film, the content of SBS is greater than 0% and less than or equal to 25%, such as 1%, 3%, 5%, 7%, 9%, 10%, 13%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, etc.; the content of OMMT (that is, nano-organic montmorillonite) is greater than 0% and less than or equal to 6%, for example, it can be 1%, 2%, 3%, 4% %, 5%, 6%, etc.
  • SBS ie styrene-butadiene-styrene block copolymer
  • the content of SBS is 15-25%, and the content of OMMT is 2-6%.
  • the content of SBS is 20%, and the content of OMMT is 4%.
  • the toughening agent is SBR (i.e. styrene-butadiene rubber); based on the total weight of the regenerated PS plastic film, the content of SBR is 25-35%, for example, it can be 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, etc.; the content of OMMT is 2-6%, such as 2%, 3%, 4% %, 5%, 6%, etc. Exemplarily, based on the total weight of the recycled PS plastic film, the content of SBR is 30%, and the content of OMMT is 4%.
  • SBR i.e. styrene-butadiene rubber
  • the toughening agent includes SBS and SBR; based on the total weight of the recycled PS plastic film, the content of SBS is greater than 0% and less than or equal to 25%, for example, it can be 1%, 3%, 5%, 7%, 9%, 10%, 13%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25% etc.; the content of SBR is greater than 0% and less than or equal to 35%, such as 1%, 3%, 5%, 10%, 15%, 20%, 25%, 26%, 27%, 28%, 29% , 30%, 31%, 32%, 33%, 34%, 35%, etc.; the content of OMMT is greater than 0% and less than or equal to 6%, for example, it can be 1%, 2%, 3%, 4%, 5% , 6% and the like; and the total content of the SBS, SBR and OMMT is less than or equal to 60%, such as 32%, 35%
  • the toughening agent SBR or SBS has a great influence on the melt flow rate of the modified waste PS plastic.
  • the melt flow rate of the modified PS plastic increases and the uniformity becomes better.
  • the total amount of the three modified materials of SBS, SBR and OMMT in the embodiment of the present invention does not exceed 60%. This is mainly due to the fact that OMMT is equivalent to the "physical cross-linking point" in the toughened modified waste PS plastic matrix.
  • the content of OMMT is low, the intercalation process is easy to reach equilibrium, and it can be stripped or completely embedded.
  • the OMMT flakes Modified plastics can be reinforced in the two-dimensional direction, so the elastic modulus of the modified material increases significantly with the increase of its content; when the content of OMMT continues to increase, only a part of OMMT is stripped or intercalated by the modified plastic, while The other part of OMMT can only exist in the original particle state, and some of them are agglomerated at this time.
  • the effect of OMMT on the molecular chain of the modified plastic in the two-dimensional direction is weakened, which reduces the bending strength of the composite material. So adding a small amount of OMMT can improve the bending performance of the nanocomposite.
  • the elongation at break of modified waste PS plastics decreased slightly with the increase of nano-organic montmorillonite, but the decrease was not large.
  • an embodiment of the present invention also provides a method for preparing a recycled PS plastic film, comprising:
  • the content of the waste PS plastic is greater than or equal to 1% and less than 100%, and the content of the modified material is greater than 0% and less than or equal to 99%.
  • the raw materials from recycling channels have many different materials, for example, some TV casings are PC/ABS, so through infrared or density separation, PS can be separated from other materials to obtain pure PS regrind, which is convenient for subsequent modification.
  • the recycled waste TV casing plastics can be crushed, cleaned, separated, dried, etc. to obtain waste PS plastics, so that waste PS plastics can be further combined with new material PS , additives and other modified materials are mixed and granulated to obtain recycled PS plastics, and the recycled PS plastics can be made into required products according to actual use requirements.
  • the regenerated PS plastic is made into a film to obtain a regenerated PS plastic film, which specifically includes:
  • the regenerated PS plastic is made into a film by an extrusion casting process or a blown film forming process to obtain a regenerated PS plastic film.
  • At least one of an antistatic agent, a flame retardant and a colorant is added during the process of making a recycled PS plastic film from recycled PS plastic.
  • PS film can also be made by mixing new material PS into recycled PS plastic.
  • substances can also be added according to actual use requirements, and no more details will be given here.
  • an embodiment of the present invention also provides an acoustomagnetic anti-theft label casing, including a sealing layer and the recycled PS plastic film provided in any one of the above embodiments, and the recycled PS plastic film is laminated with the sealing layer.
  • the thickness of the recycled PS plastic film is 0.25-0.45 mm.
  • the shell of the acoustic-magnetic anti-theft tag has a thickness of 0.25-0.45mm.
  • the sealing layer is a PE film or a PP film.
  • the material of the sealing layer includes 1-100% recycled PE film, or the material of the sealing layer includes 1-100% recycled PP film.
  • the embodiment of the present invention also provides a method for preparing the shell of the acoustomagnetic anti-theft tag, including:
  • a sealing layer is arranged on the regenerated PS plastic film to obtain an acoustic magnetic anti-theft label shell material; wherein, the regenerated PS plastic film is prepared by the method for preparing the regenerated PS plastic film;
  • the casing material of the acoustic-magnetic anti-theft tag is used to make the casing of the acoustic-magnetic anti-theft tag.
  • the sealing layer is a PE film; the sealing layer is set on the recycled PS plastic film to obtain the shell material of the acoustic-magnetic anti-theft label, which specifically includes:
  • the composite film is made into the shell of the acoustic-magnetic anti-theft soft label by using a thermoforming process at 50-80°C; wherein, the thermoforming process is a blister forming process or a concave-convex upper and lower mold compression molding process.
  • an embodiment of the present invention also provides an acoustomagnetic anti-theft tag, including the casing of the acoustomagnetic anti-theft tag.
  • the acoustomagnetic anti-theft label also includes at least one resonant sheet 2, a sealing cover 3, a bias sheet 4, double-sided adhesive tape 5 and a separation tape 6, so
  • the sealing layer of the acoustomagnetic anti-theft tag shell 1 is connected to the sealing cover 3, a cavity is provided between the sealing layer and the sealing cover 3, and the resonant plate 2 is accommodated in the cavity Inside, one side of the double-sided adhesive 5 fixes the bias sheet 4 on the sealing cover 3, and the other side of the double-sided adhesive 5 is connected with the separation strip.
  • the sealing cover 3 that the acoustomagnetic anti-theft label housing 1 that does with PS/PE composite film and PE/PET composite film does, on PE/PE face (being the PE surface of acoustomagnetic anti-theft label housing 1 and sealing cover 3) Connect the PE surface of the cover 3) with heat sealing to package the resonant plate 2 into the resonant cavity of the plastic shell 1.
  • the shell 1 of the acoustic-magnetic anti-theft label is made of PS/PE composite film material, that is, the above-mentioned shell of the acoustic-magnetic anti-theft label whose sealing layer is PE film has a thickness of 0.23-0.45mm, and the sealing cover 3 is made of PE/PET composite film , the thickness is about 0.1mm
  • the double-sided adhesive tape 5 includes a double-sided adhesive base tape 51 and an adhesive layer 52 located on both sides of the double-sided adhesive base tape 51, the double-sided adhesive base tape 51 is PET, and the thickness is about 0.01mm.
  • the acoustomagnetic anti-theft tag can also be configured in other structures according to actual use requirements, and no more details are given here.
  • the notched impact strength of the recycled PS plastic is 5.7-17.0 KJ/m 2
  • the thickness of the recycled PS plastic film is 0.20-0.45 mm.
  • the film strip when the acoustomagnetic anti-theft label casing is cut into a 2 mm wide film strip, the film strip is completely folded in half along the length direction of the film strip, and then the film strip is unfolded without brittle fracture .
  • the label shell is a brittle or tough material.
  • the label shell is cut into a strip with a width of 2 mm. After the strip is completely folded in half along the length direction of the strip, the strip will not break when it is unfolded again, that is, the strip will not be completely brittle at the bend. If No breakage after bending, whitening or partial cracking and no breakage are considered as no brittle fracture.
  • Toughened and modified waste PS plastics with rubber elastomer SBS based on the total weight of recycled PS plastic films, the content of waste PS plastics is 76%, the amount of SBS added is 20%, the mass fraction of OMMT added is 4%, after modification
  • the notched impact strength of waste PS plastic reaches the maximum value of 12.96KJ/m 2 , which is 7.26KJ/m 2 higher than that of 5.7KJ/m 2 without toughening modification, and its tensile strength reaches a good performance, specifically 30.07MPa.
  • the recycled PS plastic film with a thickness of 0.25-0.38mm is produced by extrusion casting process, and antistatic agent, color masterbatch, etc. are added in the film-making process, and the recycled PS plastic film is compounded with PE film, and then used in a temperature of 50-80°C Thermoforming (blistering or compression molding of concave and convex upper and lower molds) is used to make the shell of the acoustic magnetic anti-theft soft label. At this time, cut the label shell into a strip with a width of 2 mm, fold it completely in half along the length direction, and then unfold it without brittle fracture.
  • a recycled PS plastic film with a thickness of 0.25-0.38mm is produced by a blown film forming process, antistatic agents, flame retardants, etc. are added during the film making process, and then the recycled PS plastic film is compounded with PE film, and then passed through 50 Thermoforming at -80°C (absorption or compression molding of concave and convex upper and lower molds) is used to make the shell of the acoustic magnetic anti-theft label. At this time, cut the label shell into a strip with a width of 2 mm, fold it completely in half along the length direction, and then unfold it without brittle fracture.
  • a recycled PS plastic film with a thickness of 0.25-0.38mm is produced by a blown film forming process, antistatic agents, flame retardants, etc. are added during the film making process, and then the recycled PS plastic film is compounded with PE film, and then passed through 50 Thermoforming at -80°C (absorption or compression molding of concave and convex upper and lower molds) is used to make the shell of the acoustic magnetic anti-theft label. At this time, cut the label shell into a strip with a width of 2 mm, fold it completely in half along the length direction, and then unfold it without brittle fracture.
  • Toughening and modifying waste PS plastics with rubber elastomer SBS based on the total weight of recycled PS plastic films, the content of waste PS plastics is 95%, the amount of SBS added is 5%, and the thickness is 0.25- 0.38mm recycled PS plastic film, antistatic agent, color masterbatch, etc. are added in the film making process, the recycled PS plastic film is compounded with PE film, and then thermoformed at 50-80°C (absorption or concave-convex upper and lower mold compression molding) The outer shell of the acoustic magnetic anti-theft soft label is made. At this time, cut the label shell into a strip with a width of 2 mm, fold it completely in half along the length direction, and then unfold it without brittle fracture.
  • the rubber elastomer SBS is used to toughen and modify the waste PS plastic: based on the total weight of the recycled PS plastic film, the content of the waste PS plastic is 90% %, the amount of SBS added is 10%, and the recycled PS plastic film with a thickness of 0.25-0.38mm is produced by extrusion tape casting process, antistatic agent, color masterbatch, etc. film, and then use thermoforming at 50-80°C (blistering or compression molding with concave and convex upper and lower molds) to make the shell of the acoustic magnetic anti-theft soft label. At this time, cut the label shell into a strip with a width of 2 mm, fold it completely in half along the length direction, and then unfold it without brittle fracture.
  • the rubber elastomer SBS is used to toughen and modify the waste PS plastic: based on the total weight of the recycled PS plastic film, the content of the waste PS plastic is 90% %, the amount of SBS added is 10%, and the recycled PS plastic film with a thickness
  • Toughening and modifying waste PS plastics with rubber elastomer SBS based on the total weight of recycled PS plastic films, the content of waste PS plastics is 82%, the addition of SBS is 10%, and the addition of new PS materials is 8%.
  • the regenerated PS plastic film with a thickness of 0.25-0.38mm is produced by the extension molding process. Antistatic agents, color masterbatches, etc. are added in the film-making process, and the regenerated PS plastic film is compounded with PE film, and then thermoformed at 50-80°C (absorbent Plastic or concave-convex upper and lower mold compression molding) to make the shell of the acoustic magnetic anti-theft soft label. At this time, cut the label shell into a strip with a width of 2 mm, fold it completely in half along the length direction, and then unfold it without brittle fracture.
  • 1% waste PS plastic and 99% virgin PS are used to prepare the PS film.
  • a recycled PS plastic film with a thickness of 0.25-0.38mm is produced by a blown film forming process, antistatic agents, flame retardants, etc. are added during the film making process, and then the recycled PS plastic film is compounded with PE film, and then passed through 50 Thermoforming at -80°C (absorption or compression molding of concave and convex upper and lower molds) is used to make the shell of the acoustic magnetic anti-theft label. At this time, cut the label shell into a strip with a width of 2 mm, fold it completely in half along the length direction, and then unfold it without brittle fracture.
  • the recycled PS plastic film Based on the total weight of the recycled PS plastic film, 100% waste PS plastic is used to prepare the recycled PS plastic film, but the recycled PS plastic film with a thickness of 0.31-0.45mm can be successfully produced through the extrusion tape casting process, and then the recycled PS plastic film
  • the PS plastic film is compounded with 100% recycled PE film (0.06mm), and then the shell of the acoustic magnetic anti-theft soft label is made by thermoforming at 50-80°C (absorption compression molding). At this time, cut a label shell into a strip with a width of 2 mm, fold it completely in half along the length direction, and then unfold it without brittle fracture.
  • the resonant film (1-5 pieces, 2 pieces in this example) into the cavity of the remaining label shell that has been made, heat seal the PE/PE surface with PE/PET (sealing cover material), and seal the partial
  • the film is fixed on the top of the cavity with glue, and then covered with double-sided adhesive tape and a separate bottom belt, and the acoustic-magnetic anti-theft label of the present invention is die-cut.
  • the resonant film (1-5 pieces, 4 pieces in this example) into the cavity of the remaining label shell, heat seal the PP/PP surface with PP/PET (sealing cover material), and seal the partial
  • the film is fixed on the top of the cavity with glue, and then covered with double-sided adhesive tape and a separate bottom belt, and the acoustic-magnetic anti-theft label of the present invention is die-cut.
  • the following steps can be used to determine whether the PS part of the acoustomagnetic label shell contains polystyrene plastic recycled materials: (1) Take the PS part of the acoustomagnetic label shell (2) Identify the sample by at least three methods of infrared spectroscopy, headspace gas chromatography, electron microscope analysis, and elemental distribution analysis; if at least three of the above methods are used for identification, at least three of the methods can It is judged that the sample contains 1-100% of recycled polystyrene plastic materials.
  • the beneficial effect of the embodiment of the present invention is that the embodiment of the present invention provides a recycled PS plastic film, which is made of 100% waste PS plastic, or made of waste PS plastic and modified materials. wherein, the content of waste PS plastics is greater than or equal to 1% and less than 100%, and the content of modified materials is greater than or equal to 0% and less than or equal to 99%.
  • the embodiment of the present invention uses waste and old PS plastics to prepare recycled PS plastic films, which can save resources , more green and environmentally friendly.
  • the modified materials are used to modify the waste PS plastic to improve the performance of the plastic, which is beneficial to the preparation of the shell of the acoustomagnetic anti-theft label with good performance.
  • the embodiments of the present invention also provide a method for preparing a recycled PS plastic film, an acoustomagnetic anti-theft label shell, a method for preparing an acoustomagnetic anti-theft label shell, and an acoustomagnetic anti-theft label.

Abstract

一种再生PS塑料薄膜，其通过100％的废旧PS塑料制成，或通过废旧PS塑料和改性材料混合制成，其中，废旧塑料的含量大于等于1％且小于100％，改性材料的含量为大于0％且小于等于99％。利用废旧PS塑料制备再生PS塑料薄膜，能够节约资源。此外，通过改性材料改性废旧PS塑料，以提高塑料的性能，有利于制备符合性能良好的声磁防盗标签外壳。同时，还相应地提供了一种再生PS塑料薄膜的制备方法、及用该薄膜制成的声磁防盗标签外壳及其制备方法和相应的声磁防盗标签。

Description

再生PS塑料薄膜、声磁防盗标签、标签外壳及其制备方法 技术领域
本发明涉及材料技术领域，特别是涉及一种再生PS塑料薄膜、声磁防盗标签、标签外壳及其制备方法。
背景技术
目前，声磁防盗标签一般由塑料外壳(主要由聚苯乙烯(Polystyrene，PS)薄膜构成)/聚乙烯(polyethylene，PE)、非晶片、半硬磁片、PE/聚对苯二甲酸乙二醇酯(Polyethyleneglycol Terephthalate，PET)封接盖材、不干胶粘贴纸等多层结构构成，其是大量需要的一次性使用耗品，主要用于全球零售超市、商场、连锁店等场所的防盗，每年用量高达几百亿片。声磁防盗标签主要附着在商品包装上，顾客挑选商品后可以在收银台付款消磁，假如偷盗者没有付款而试图将商品带出商店，则商品经过门口声磁报警天线时标签会触发报警，从而达到防盗效果。客户付款后收银员将标签退磁解码，该商品带出商店时就不再触发报警。这是目前零售业开架销售重要的防盗措施。使用后扔弃的标签中的PS无法回收，容易污染环境。随着各国推出“限塑令”，商家需要有一种声磁标签采用一定程度的再生塑料来完成不断增强的环保任务。
本领域技术人员一般认为声磁防盗标签的外壳PS塑料对流动性、弯曲强度、冲击强度、断裂伸长率等力学性能和稳定性等方面具有一定的要求。而目前市场上已出现一些再生PS母料，但这样的材料多数是从刚性的厚板材产品(原来是高抗冲击聚苯乙烯HIPS)回收来的(例如废旧电视机外壳)，由于其厚板材很容易脆断，导致一般技术人员并不会想到用其去制成0.20-0.45mm厚度的无脆性的薄膜卷。通过凝胶色谱法分析表明，市场上的这类回收的PS料的分子量变小，分子量分布变宽，分散度PD值变大，例如废旧PS塑料经过长时间使用后存在一定的降解，分解成小分子。虽然根据聚合物数均分子量的定义，计算出废旧PS塑料中84％以上的大分子没有发生断链降解，但通过对废旧HIPS塑料进行力学性能 测试，可知其抗冲强度与新料相比下降比较大，悬臂梁缺口冲击强度下降到5.7kJ/m2。这时的材料已经不属于高抗冲击的特性,已经变为一般的聚苯乙烯PS。上述数据使得本领域一般技术人员认为市场上的再生PS料的性能比较差，容易发生脆断，难以满足制造声磁防盗软标签外壳的要求。因此目前在市场上，仅有少数几款牌号的PS全新料制成声磁防盗标签的外壳,尚无采用再生PS料制成外壳的声磁防盗标签。
发明内容
本发明实施例的目的是克服前述的技术痛点，提供一种再生PS塑料薄膜、声磁防盗标签、标签外壳及其制备方法，其能够利用废旧PS塑料制备再生PS塑料薄膜，以节约资源，满足广大客户对于环保绿色的声磁防盗标签的迫切需求。
为了解决上述技术问题，本发明实施例提供一种再生PS塑料薄膜，包括废旧PS塑料，以所述再生PS塑料薄膜总重计，所述废旧PS塑料的含量为100％。
为了解决相同的技术问题，本发明实施例还提供一种再生PS塑料薄膜，包括废旧PS塑料和改性材料，以所述再生PS塑料薄膜总重计，所述废旧PS塑料的含量为大于等于1％且小于100％，所述改性材料的含量为大于0％且小于等于99％。
作为优选方案，以所述再生PS塑料薄膜总重计，所述废旧PS塑料的含量为10-76％，所述改性材料的含量为24-90％。
作为优选方案，所述改性材料包括新料PS和助剂中的至少一种。
作为优选方案，所述助剂包括增韧剂。
作为优选方案，所述增韧剂包括SBS和SBR中的至少一种。
作为优选方案，所述助剂还包括OMMT，所述增韧剂为SBS；以所述再生PS塑料薄膜总重计，SBS的含量为大于0％且小于等于25％，OMMT的含量大于0％且小于等于6％。
作为优选方案，以所述再生PS塑料薄膜总重计，SBS的含量为20％，OMMT的含量为4％。
作为优选方案，所述助剂还包括OMMT，所述增韧剂为SBR；以所述再生PS 塑料薄膜总重计，SBR的含量为25-35％，OMMT的含量为2-6％。
作为优选方案，以所述再生PS塑料薄膜总重计，SBR的含量为30％，OMMT的含量为4％。
作为优选方案，所述助剂还包括OMMT，所述增韧剂包括SBS和SBR；以所述再生PS塑料薄膜总重计，SBS的含量为大于0％且小于等于25％，SBR的含量为大于0％且小于等于35％，OMMT的含量为大于0％且小于等于6％，且所述SBS、SBR和OMMT的总含量小于或等于60％。
作为优选方案，再生PS塑料为再生HIPS塑料，废旧PS塑料为废旧HIPS塑料。
为了解决相同的技术问题，本发明实施例还提供一种制备所述的再生PS塑料薄膜的方法，包括：
将废旧PS塑料进行造粒；
将造粒后的废旧PS塑料制成薄膜，得到再生PS塑料薄膜；其中，以所述再生PS塑料薄膜总重计，所述废旧PS塑料的含量为100％。
作为优选方案，所述将造粒后的废旧PS塑料制成薄膜，得到再生PS塑料薄膜，具体包括：
采用挤出流延成型工艺或吹膜成型工艺将造粒后的废旧PS塑料制成薄膜，得到再生PS塑料薄膜。
为了解决相同的技术问题，本发明实施例还提供一种制备所述的再生PS塑料薄膜的方法，包括：
将废旧PS塑料和改性材料进行混合；
将混合后的废旧PS塑料和改性材料进行造粒，得到再生PS塑料；
将再生PS塑料制成薄膜，得到再生PS塑料薄膜；
其中，以所述再生PS塑料薄膜总重计，所述废旧PS塑料的含量为大于等于1％且小于100％，所述改性材料的含量为大于0％且小于等于99％。
作为优选方案，所述将再生PS塑料制成薄膜，得到再生PS塑料薄膜，具体包括：
采用挤出流延成型工艺或吹膜成型工艺将再生PS塑料制成薄膜，得到再生PS塑料薄膜。
作为优选方案，在所述采用再生PS塑料制成再生PS塑料薄膜的过程中，加入抗静电剂、阻燃剂和着色剂中的至少一种。
为了解决相同的技术问题，本发明实施例还提供一种声磁防盗标签外壳，包括封接层以及所述的再生PS塑料薄膜，所述再生PS塑料薄膜与所述封接层层叠设置。
作为优选方案，所述再生PS塑料薄膜的厚度为0.20-0.45mm。
作为优选方案，所述声磁防盗标签外壳的厚度为0.23-0.45mm。
作为优选方案，所述封接层为PE膜或PP膜。
作为优选方案，所述封接层的材质包括有1-100％再生的PE膜，或所述封接层的材质包括有1-100％再生的PP膜。
为了解决相同的技术问题，本发明实施例还提供一种制备所述的声磁防盗标签外壳的方法，包括：
在再生PS塑料薄膜上设置封接层，得到声磁防盗标签外壳材料；其中，所述再生PS塑料薄膜采用所述的再生PS塑料薄膜的制备方法制备得到；
采用所述声磁防盗标签外壳材料制成声磁防盗标签外壳。
作为优选方案，所述封接层为PE膜；所述在再生PS塑料薄膜上设置封接层，得到声磁防盗标签外壳材料，具体包括：
将所述再生PS塑料薄膜与PE膜进行复合，得到复合膜；
采用50-80℃的热成形工艺将所述复合膜制成声磁防盗软标签的外壳；其中，所述热成形工艺为吸塑成形工艺或凹凸上下模具压塑成形工艺。
为了解决相同的技术问题，本发明实施例还提供一种声磁防盗标签，包括所述的声磁防盗标签外壳。
作为优选方案，所述声磁防盗标签还包括至少一个共振片、封接盖、偏置片、双面胶和分离带，所述声磁防盗标签外壳的封接层与所述封接盖连接，所述封接层和所述封接盖之间设有空腔，所述共振片容纳于所述空腔内，所述双面胶的一 面将所述偏置片固定在所述封接盖上，所述双面胶的另一面与所述分离带连接。
作为优选方案，再生PS塑料的缺口冲击强度为5.7-17.0KJ/m 2，所述再生PS塑料薄膜的厚度为0.20-0.38mm。
作为优选方案，用所述声磁防盗标签外壳剪出2mm宽的薄膜长条时，沿所述薄膜长条的长度方向完全对折后再展开所述薄膜长条无脆性折断。
相比于现有技术，本发明实施例的有益效果在于：本发明实施例提供了一种再生PS塑料薄膜，其通过100％的废旧PS塑料制成，或通过废旧PS塑料和改性材料制成，其中，废旧PS塑料的含量大于等于1％且小于100％，改性材料的含量为大于0％且小于等于99％，本发明各实施例利用废旧PS塑料制备再生PS塑料薄膜，能够节约资源，更加绿色环保。此外，通过改性材料改性废旧PS塑料，以提高塑料的性能，有利于制备符合性能良好的声磁防盗标签外壳。同时，本发明实施例还相应地提供了一种再生PS塑料薄膜的制备方法、声磁防盗标签外壳、声磁防盗标签外壳的制备方法和声磁防盗标签。
附图说明
图1是本发明实施例中的声磁防盗标签的结构示意图；
图2是本发明实施例中的再生PS塑料薄膜的制备工艺流程图；
其中，1、声磁防盗标签外壳；2、共振片；3、封接盖；4、偏置片；5、双面胶；51、双面胶基带；52、胶层；6、分离带。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在本发明提供的一个实施例中，再生PS塑料薄膜包括废旧PS塑料，以所述再生PS塑料薄膜总重计，所述废旧PS塑料的含量为100％。再生PS塑料薄膜通过100％的废旧PS塑料制成，最大程度利用了废旧PS塑料制备再生PS塑料薄膜，从而尽可能节约更多的资源，同时能够用于制备符合性能良好的声磁防盗标签外 壳。
其中，作为本发明的一举例，再生PS塑料为再生HIPS塑料，废旧PS塑料为废旧HIPS塑料。
在一种可选的实施方式中,当本发明人采用了100％的刚性的废旧PS厚板塑料进行熔化制膜时,发现可以成功地制成柔性的0.20-0.45mm的薄膜，并且不会像在厚板时一样发生脆性断裂，这样本发明的0.20-0.45mm再生PS可以不用改性直接用来做声磁防盗标签的外壳而不会产生脆性断裂，产生了意想不到的技术效果。
相应地，本发明实施例还提供一种制备再生PS塑料薄膜的方法，包括：
将废旧PS塑料进行造粒；
将造粒后的废旧PS塑料制成薄膜，得到再生PS塑料薄膜；其中，以所述再生PS塑料薄膜总重计，所述废旧PS塑料的含量为100％。
在具体实施当中，由于回收渠道来的原料(例如废旧电视机外壳塑料)具有多种不同的材料，比如有些电视机外壳是PC/ABS，因此通过红外或者密度分离，可将PS与其它材料分开，以得到纯的PS回料，从而便于后续进行再生及改性再生。示例性地，可以先将回收到的废旧电视机外壳塑料进行破碎、清洗、分离、干燥等处理，以得到废旧PS塑料。
具体地，所述将造粒后的废旧PS塑料制成薄膜，得到再生PS塑料薄膜，具体包括：采用挤出流延成型工艺或吹膜成型工艺将造粒后的废旧PS塑料制成薄膜，得到再生PS塑料薄膜。
在本发明实施例中，实施再生PS塑料薄膜的厚度为0.20-0.45mm。
在另一个实施例中，再生PS塑料薄膜包括废旧PS塑料和改性材料，以所述再生PS塑料薄膜总重计，所述废旧PS塑料的含量为大于等于1％且小于100％，所述改性材料的含量为大于0％且小于等于99％。
在上述实施例中，再生PS塑料薄膜通过废旧PS塑料和改性材料制成，其中，废旧PS塑料的含量大于等于1％且小于100％，改性材料的含量为大于0％且小于等于99％，充分利用了废旧PS塑料制备再生PS塑料薄膜，从而尽可能节约更多的 资源。在具体应用中，当废旧PS回收料来源不够时或者为了进一步提高再生PS塑料薄膜的性能,可以通过添加改性材料改性废旧PS塑料，从而有利于制备符合性能良好的声磁防盗标签外壳。
具体地，通过使用废旧料及其改性再生利用技术应用于制造再生塑料声磁防盗标签,即“提倡绿色(Green Initiative)”声磁防盗软标签，不仅能缓解大量的废旧电气设备如废旧电视机外壳塑料对环境造成的污染，还能变废为宝、节约资源。此外，通过共混增韧改性废旧PS塑料，可以提高塑料的抗冲强度，并且保持拉伸和弯曲强度，同时保持良好流动性的情况下，可以制出0.20-0.45mm的再生PS薄膜，再采用该再生PS薄膜制造声磁标签外壳，以满足生产"提倡绿色(Green Initiative)"声磁防盗软标签的要求。
在具体实施当中，废旧PS塑料的含量大于等于1％且小于100％，例如可以是1％、5％、10％、15％、20％、25％、30％、35％、40％、41％、42％、43％、44％、45％、46％、47％、48％、49％、50％、51％、52％、53％、54％、55％、56％、57％、58％、60％、65％、70％、73％、76％、80％、82％、85％、88％、90％、92％、95％、99％等，其具体含量可根据实际要求进行设置，在此不做更多的赘述。改性材料的含量为大于0％且小于等于99％，例如可以是1％、5％、10％、15％、20％、24％、25％、26％、30％、35％、40％、45％、50％、55％、60％、65％、70％、75％、80％、85％、90％、99％等，其具体含量可根据实际要求进行设置，在此不做更多的赘述。优选地，以所述再生PS塑料薄膜总重计，所述废旧PS塑料的含量为10-76％，所述改性材料的含量为24-90％。
在一种可选的实施方式中，所述改性材料包括新料PS和助剂中的至少一种。示例性地，所述助剂包括增韧剂。所述增韧剂包括SBS和SBR中的至少一种。在本发明实施例中，由于SBS和SBR都是良好的增韧剂，同时由于SBS、SBR与废旧PS塑料分子链段中都含有苯乙烯单元，因而增韧剂SBR和SBS与废旧PS塑料有较好的相容性，并能在一定程度上增韧废旧PS塑料，可选地，所述助剂还可以包括OMMT，采用OMMT改性废旧PS塑料，提高塑料的抗冲强度、拉伸强度、弯曲强度和流动性，有利于制备符合性能良好的声磁防盗标签外壳。
在一种可选的实施方式中，所述增韧剂为SBS(即苯乙烯-丁二烯-苯乙烯嵌 段共聚物)；以所述再生PS塑料薄膜总重计，SBS的含量为大于0％且小于等于25％，例如可以是1％、3％、5％、7％、9％、10％、13％、15％、16％、17％、18％、19％、20％、21％、22％、23％、24％、25％等；OMMT(即纳米有机蒙脱土)的含量为大于0％且小于等于6％，例如可以是1％、2％、3％、4％、5％、6％等。优选地，以所述再生PS塑料薄膜总重计，SBS的含量为15-25％，OMMT的含量为2-6％。示例性地，以所述再生PS塑料薄膜总重计，SBS的含量为20％，OMMT的含量为4％。
在一种可选的实施方式中，所述增韧剂为SBR(即丁苯橡胶)；以所述再生PS塑料薄膜总重计，SBR的含量为25-35％，例如可以是25％、26％、27％、28％、29％、30％、31％、32％、33％、34％、35％等；OMMT的含量为2-6％，例如可以是2％、3％、4％、5％、6％等。示例性地，以所述再生PS塑料薄膜总重计，SBR的含量为30％，OMMT的含量为4％。
在一种可选的实施方式中，所述增韧剂包括SBS和SBR；以所述再生PS塑料薄膜总重计，SBS的含量为大于0％且小于等于25％，例如可以是1％、3％、5％、7％、9％、10％、13％、15％、16％、17％、18％、19％、20％、21％、22％、23％、24％、25％等；SBR的含量为大于0％且小于等于35％，例如可以是1％、3％、5％、10％、15％、20％、25％、26％、27％、28％、29％、30％、31％、32％、33％、34％、35％等；OMMT的含量为大于0％且小于等于6％，例如可以是1％、2％、3％、4％、5％、6％等；且所述SBS、SBR和OMMT的总含量小于或等于60％，例如可以是32％、35％、37％、39％、42％、43％、44％、45％、46％、47％、48％、49％、50％、51％、52％、53％、54％、55％、56％、57％、58％、59％、60％等。
需要说明的是，增韧剂SBR或SBS对改性废旧PS塑料熔体流动速率的影响很大，随着增韧剂的增加，改性PS塑料熔体流动速率增大，均匀度变好。本发明实施例的SBS、SBR和OMMT这三项改性材料总量不超过60％。这主要由于OMMT在增韧改性废旧PS塑料基体中相当于“物理交联点”，当OMMT含量较低时，插层过程容易达到平衡，它能被剥离或完全嵌入，此时的OMMT薄片可以在二维方向上对改性塑料增强，因此改性材料的弹性模量随着其含量的增加而显著提高；继续增加OMMT的含量时，只有一部分OMMT被改性塑料剥离或插层，而另一部分 OMMT只能以原始的颗粒状态存在，这时有部分还发生团聚，其结果是OMMT在二维方向上对改性塑料的分子链的作用减弱，使得复合材料的弯曲强度降低。所以添加少量的OMMT就能使纳米复合材料的弯曲性能得到改善。改性废旧PS塑料断裂伸长率随着纳米有机蒙脱土的增加略有较少，但降幅不大。
相应地，本发明实施例还提供一种制备再生PS塑料薄膜的方法，包括：
将废旧PS塑料和改性材料进行混合；
将混合后的材料进行造粒，得到再生PS塑料；
将再生PS塑料制成薄膜，得到再生PS塑料薄膜；
其中，以所述再生PS塑料薄膜总重计，所述废旧PS塑料的含量为大于等于1％且小于100％，所述改性材料的含量为大于0％且小于等于99％。
如图2所示的，在具体实施当中，由于回收渠道来的原料(例如废旧电视机外壳塑料)具有多种不同的材料，比如有些电视机外壳是PC/ABS，因此通过红外或者密度分离，可将PS与其它材料分开，以得到纯的PS回料，从而便于后续进行改性。示例性地，请参阅图2所示，可以先将回收到的废旧电视机外壳塑料进行破碎、清洗、分离、干燥等处理，以得到废旧PS塑料，从而可以进一步将废旧PS塑料与新料PS、助剂等改性材料进行混合、造粒，进而得到再生PS塑料，后续还可根据实际使用要求将再生PS塑料制成所需要的产品。
在一种可选的实施方式中，所述将再生PS塑料制成薄膜，得到再生PS塑料薄膜，具体包括：
采用挤出流延成型工艺或吹膜成型工艺将再生PS塑料制成薄膜，得到再生PS塑料薄膜。
在一种可选的实施方式中，在所述采用再生PS塑料制成再生PS塑料薄膜的过程中，加入抗静电剂、阻燃剂和着色剂中的至少一种。在具体实施当中，还可以通过在再生PS塑料中混入新料PS来制成PS膜，当然，还可以根据实际使用要求添加物质，在此不做更多的赘述。
相应地，本发明实施例还提供一种声磁防盗标签外壳，包括封接层以及上述任一个实施例提供的再生PS塑料薄膜，所述再生PS塑料薄膜与所述封接层层叠 设置。
在一种可选的实施方式中，所述再生PS塑料薄膜的厚度为0.25-0.45mm。
在一种可选的实施方式中，所述声磁防盗标签外壳的厚度为0.25-0.45mm。
在一种可选的实施方式中，所述封接层为PE膜或PP膜。
在一种可选的实施方式中，所述封接层的材质包括有1-100％再生的PE膜，或所述封接层的材质包括有1-100％再生的PP膜。
相对应地，本发明实施例还提供一种制备所述的声磁防盗标签外壳的方法，包括：
在再生PS塑料薄膜上设置封接层，得到声磁防盗标签外壳材料；其中，所述再生PS塑料薄膜采用所述的再生PS塑料薄膜的制备方法制备得到；
采用所述声磁防盗标签外壳材料制成声磁防盗标签外壳。
在一种可选的实施方式中，所述封接层为PE膜；所述在再生PS塑料薄膜上设置封接层，得到声磁防盗标签外壳材料，具体包括：
将所述再生PS塑料薄膜与PE膜进行复合，得到复合膜；
采用50-80℃的热成形工艺将所述复合膜制成声磁防盗软标签的外壳；其中，所述热成形工艺为吸塑成形工艺或凹凸上下模具压塑成形工艺。
相应地，本发明实施例还提供一种声磁防盗标签，包括所述的声磁防盗标签外壳。
如图1所示，在一种可选的实施方式中，所述声磁防盗标签还包括至少一个共振片2、封接盖3、偏置片4、双面胶5和分离带6，所述声磁防盗标签外壳1的封接层与所述封接盖3连接，所述封接层和所述封接盖3之间设有空腔，所述共振片2容纳于所述空腔内，所述双面胶5的一面将所述偏置片4固定在所述封接盖3上，所述双面胶5的另一面与所述分离带连接。
在具体实施当中，用PS/PE复合膜做的声磁防盗标签外壳1和PE/PET复合膜做的封接盖3，在PE/PE面(即声磁防盗标签外壳1的PE面和封接盖3的PE面)用热封将共振片2封装进塑料外壳1的共振腔内。然后用双面胶5将偏置片4固定在已经封装好的声磁防盗标签外壳1的PET面上,模切后将标签从分离带6 取下即可贴在商品表面使用。示例性地，声磁防盗标签外壳1为PS/PE复合膜材料，即封接层为PE膜的上述声磁防盗标签外壳，厚度为0.23-0.45mm，封接盖3为PE/PET复合膜，厚度大约为0.1mm，所述双面胶5包括双面胶基带51和设于所述双面胶基带51两面的胶层52，双面胶基带51为PET，厚度大约为0.01mm。当然，所述声磁防盗标签还可以根据实际使用要求设置为其他结构，在此不做更多的赘述。
在一种可选的实施方式中，再生PS塑料的缺口冲击强度为5.7-17.0KJ/m 2，所述再生PS塑料薄膜的厚度为0.20-0.45mm。
在一种可选的实施方式中，当所述声磁防盗标签外壳剪出2mm宽的薄膜长条时，沿所述薄膜长条的长度方向完全对折后再展开所述薄膜长条无脆性折断。
在具体实施当中，通过将声磁标签外壳剪出2mm宽的长条并通过全弯折对折再展开的方式可以检验标签外壳是脆性还是韧性的材料。示例性地，将标签外壳剪出2毫米宽的长条，沿该长条的长度方向完全对折后，该长条再展开时无折断，即该长条不在弯折处产生完全脆性折断，假如弯折后不折断，产生发白或者部分破裂并且不断开都视作没有脆性折断。
下面结合以下实施例对本发明提供的声磁防盗标签外壳的制备方法进行说明。
实施例1
以再生PS塑料薄膜总重计，采用100％废旧PS塑料来制备再生PS塑料薄膜，虽然此时材料缺口冲击强度只有5.7KJ/m 2，但是通过挤出流延成型工艺可以成功地制出厚度为0.25-0.38mm的再生PS塑料薄膜，接着将再生PS塑料薄膜复合PE膜，再用50-80℃的热成形(吸塑或凹凸上下模具压塑成形)制成声磁防盗软标签的外壳。此时将标签外壳剪出两毫米宽的长条，沿长度方向完全对折后再展开无脆性折断。
实施例2
用橡胶弹性体SBS增韧改性废旧PS塑料：以再生PS塑料薄膜总重计，废旧PS塑料含量为76％，SBS加入量为20％，OMMT的添加量质量分数为4％，改性后废 旧PS塑料缺口冲击强度达到最大值12.96KJ/m 2，比未增韧改性前5.7KJ/m 2提高了7.26KJ/m 2，其拉伸强度都达到较好性能，具体为30.07MPa。
通过挤出流延成型工艺制出厚度为0.25-0.38mm的再生PS塑料薄膜，在制膜过程加入抗静电剂、色母等，将再生PS塑料薄膜复合PE膜，再用50-80℃的热成形(吸塑或凹凸上下模具压塑成形)制成声磁防盗软标签的外壳。此时将标签外壳剪出两毫米宽的长条，沿长度方向完全对折后再展开无脆性折断。
实施例3
用橡胶弹性体SBR增韧改性废旧PS塑料：以再生PS塑料薄膜总重计，废旧PS塑料含量为66％，SBR加入量为30％，OMMT的添加量质量分数为4％，改性废旧PS塑料缺口冲击强度达到最大值11.86KJ/m 2，比未增韧改性前5.7KJ/m 2提高了6.16KJ/m 2，其拉伸强度都达到较好性能，具体为28.67MPa。此时将标签外壳剪出两毫米宽的长条，沿长度方向完全对折后再展开无脆性折断。
实施例4
以再生PS塑料薄膜总重计，用橡胶弹性体SBS和SBR增韧改性废旧PS塑料：以再生PS塑料薄膜总重计，废旧PS塑料含量为51％，SBS、SBR、OMMT三项改性材料总量为49％。此时将标签外壳剪出两毫米宽的长条，沿长度方向完全对折后再展开无脆性折断。
实施例5
以再生PS塑料薄膜总重计，采用51％再生PS塑料和49％新料PS来制备再生PS塑料薄膜。具体地，用吹膜成型工艺制出厚度为0.25-0.38mm的再生PS塑料薄膜，在制膜过程中加入抗静电剂、阻燃剂等，再将再生PS塑料薄膜复合PE膜，再通过50-80℃的热成形(吸塑或凹凸上下模具压塑成形)制成声磁防盗标签的外壳。此时将标签外壳剪出两毫米宽的长条，沿长度方向完全对折后再展开无脆性折断。
实施例6
以再生PS塑料薄膜总重计，采用10％再生PS塑料和90％新料PS来制备再生PS塑料薄膜。具体地，用吹膜成型工艺制出厚度为0.25-0.38mm的再生PS塑料 薄膜，在制膜过程中加入抗静电剂、阻燃剂等，再将再生PS塑料薄膜复合PE膜，再通过50-80℃的热成形(吸塑或凹凸上下模具压塑成形)制成声磁防盗标签的外壳。此时将标签外壳剪出两毫米宽的长条，沿长度方向完全对折后再展开无脆性折断。
实施例7
用橡胶弹性体SBS增韧改性废旧PS塑料：以再生PS塑料薄膜总重计，废旧PS塑料含量为95％，SBS加入量为5％，通过挤出流延成型工艺制出厚度为0.25-0.38mm的再生PS塑料薄膜，在制膜过程加入抗静电剂、色母等，将再生PS塑料薄膜复合PE膜，再用50-80℃的热成形(吸塑或凹凸上下模具压塑成形)制成声磁防盗软标签的外壳。此时将标签外壳剪出两毫米宽的长条，沿长度方向完全对折后再展开无脆性折断。
实施例8
以再生PS塑料薄膜总重计，采用100％再生PS塑料来制备PS膜，其中，用橡胶弹性体SBS增韧改性废旧PS塑料：以再生PS塑料薄膜总重计，废旧PS塑料含量为90％，SBS加入量为10％，通过挤出流延成型工艺制出厚度为0.25-0.38mm的再生PS塑料薄膜，在制膜过程加入抗静电剂、色母等，将再生PS塑料薄膜复合PE膜，再用50-80℃的热成形(吸塑或凹凸上下模具压塑成形)制成声磁防盗软标签的外壳。此时将标签外壳剪出两毫米宽的长条，沿长度方向完全对折后再展开无脆性折断。
实施例9
用橡胶弹性体SBS增韧改性废旧PS塑料：以再生PS塑料薄膜总重计，废旧PS塑料含量为82％，SBS加入量为10％，PS新料加入量为8％，通过挤出流延成型工艺制出厚度为0.25-0.38mm的再生PS塑料薄膜，在制膜过程加入抗静电剂、色母等，将再生PS塑料薄膜复合PE膜，再用50-80℃的热成形(吸塑或凹凸上下模具压塑成形)制成声磁防盗软标签的外壳。此时将标签外壳剪出两毫米宽的长条，沿长度方向完全对折后再展开无脆性折断。
实施例10
以再生PS塑料薄膜总重计，采用1％废旧PS塑料和99％新料PS来制备PS膜。具体地，用吹膜成型工艺制出厚度为0.25-0.38mm的再生PS塑料薄膜，在制膜过程中加入抗静电剂、阻燃剂等，再将再生PS塑料薄膜复合PE膜，再通过50-80℃的热成形(吸塑或凹凸上下模具压塑成形)制成声磁防盗标签的外壳。此时将标签外壳剪出两毫米宽的长条，沿长度方向完全对折后再展开无脆性折断。
实施例11
以再生PS塑料薄膜总重计，采用100％废旧PS塑料来制备再生PS塑料薄膜，但是通过挤出流延成型工艺可以成功地制出厚度为0.31-0.45mm的再生PS塑料薄膜，接着将再生PS塑料薄膜复合100％再生的PE膜(0.06mm)，再用50-80℃的热成形(吸塑压塑成形)制成声磁防盗软标签的外壳。此时将一个标签外壳剪出两毫米宽的长条，沿长度方向完全对折后再展开无脆性折断。将共振片(可以1-5片,本例为2片)放入已制好的其余标签外壳的空腔内,用PE/PET(封接盖材)将PE/PE面热封，将偏置片用胶固定在空腔上方再覆上双面胶及分离底带，模切出本发明的声磁防盗标签。
实施例12
以再生PS塑料薄膜总重计，采用100％废旧PS塑料来制备再生PS塑料薄膜，但是通过挤出流延成型工艺可以成功地制出厚度为0.20-0.32mm的再生PS塑料薄膜，接着将再生PS塑料薄膜复合1％再生的PP膜(0.03mm)，再用50-80℃的热成形(凹凸上下模具压塑成形)制成声磁防盗软标签的外壳。此时将一个标签外壳剪出两毫米宽的长条，沿长度方向完全对折后再展开无脆性折断。将共振片(可以1-5片,本例为4片)放入已制好的其余标签外壳的空腔内,用PP/PET(封接盖材)将PP/PP面热封，将偏置片用胶固定在空腔上方再覆上双面胶及分离底带，模切出本发明的声磁防盗标签。
需要说明的是，依据专利申请号为CN201711280664.8的中国专利，可以用 以下步骤判定声磁标签外壳PS部分样品中是否含有聚苯乙烯塑料再生回收料：(1)取声磁标签外壳PS部分的样品；(2)将样品采用红外光谱分析、顶空气相色谱分析、电镜分析、元素分布分析中的至少三种方法进行鉴别；若采用上述至少三种方法进行鉴别时，至少有三种方法可以判定出样品中含有聚苯乙烯塑料再生回收料1-100％。
相比于现有技术，本发明实施例的有益效果在于：本发明实施例提供了一种再生PS塑料薄膜，其通过100％的废旧PS塑料制成，或通过废旧PS塑料和改性材料制成，其中，废旧PS塑料的含量大于等于1％且小于100％，改性材料的含量为大于0％且小于等于99％，本发明实施例利用废旧PS塑料制备再生PS塑料薄膜，能够节约资源，更加绿色环保。此外，通过改性材料改性废旧PS塑料，以提高塑料的性能，有利于制备符合性能良好的声磁防盗标签外壳。同时，本发明实施例还相应地提供了一种再生PS塑料薄膜的制备方法、声磁防盗标签外壳、声磁防盗标签外壳的制备方法和声磁防盗标签。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以作出若干改进和替换，这些改进和替换也应视为本发明的保护范围。

Claims (28)

  1. 一种再生PS塑料薄膜，其特征在于，包括废旧PS塑料，以所述再生PS塑料薄膜总重计，所述废旧PS塑料的含量为100％。
  2. 一种再生PS塑料薄膜，其特征在于，包括废旧PS塑料和改性材料，以所述再生PS塑料薄膜总重计，所述废旧PS塑料的含量为大于等于1％且小于100％，所述改性材料的含量为大于0％且小于等于99％。
  3. 如权利要求2所述的再生PS塑料薄膜，其特征在于，以所述再生PS塑料薄膜总重计，所述废旧PS塑料的含量为10-76％，所述改性材料的含量为24-90％。
  4. 如权利要求2所述的再生PS塑料薄膜，其特征在于，所述改性材料包括新料PS和助剂中的至少一种。
  5. 如权利要求4所述的再生PS塑料薄膜，其特征在于，所述助剂包括增韧剂。
  6. 如权利要求5所述的再生PS塑料薄膜，其特征在于，所述增韧剂包括SBS和SBR中的至少一种。
  7. 如权利要求6所述的再生PS塑料薄膜，其特征在于，所述助剂还包括OMMT，所述增韧剂为SBS；以所述再生PS塑料薄膜总重计，SBS的含量为大于0％且小于等于25％，OMMT的含量大于0％且小于等于6％。
  8. 如权利要求7所述的再生PS塑料薄膜，其特征在于，以所述再生PS塑料薄膜总重计，SBS的含量为20％，OMMT的含量为4％。
  9. 如权利要求6所述的再生PS塑料薄膜，其特征在于，所述助剂还包括OMMT，所述增韧剂为SBR；以所述再生PS塑料薄膜总重计，SBR的含量为25-35％，OMMT的含量为2-6％。
  10. 如权利要求9所述的再生PS塑料薄膜，其特征在于，以所述再生PS塑料薄膜总重计，SBR的含量为30％，OMMT的含量为4％。
  11. 如权利要求6所述的再生PS塑料薄膜，其特征在于，所述助剂还包括OMMT，所述增韧剂包括SBS和SBR；以所述再生PS塑料薄膜总重计，SBS的含量 为大于0％且小于等于25％，SBR的含量为大于0％且小于等于35％，OMMT的含量为大于0％且小于等于6％，且所述SBS、SBR和OMMT的总含量小于或等于60％。
  12. 如权利要求2-11任一项所述的再生PS塑料薄膜，其特征在于，再生PS塑料为再生HIPS塑料，废旧PS塑料为废旧HIPS塑料。
  13. 一种制备如权利要求1所述的再生PS塑料薄膜的方法，其特征在于，包括：
    将废旧PS塑料进行造粒；
    将造粒后的废旧PS塑料制成薄膜，得到再生PS塑料薄膜；其中，以所述再生PS塑料薄膜总重计，所述废旧PS塑料的含量为100％。
  14. 如权利要求13所述的再生PS塑料薄膜的方法，其特征在于，所述将造粒后的废旧PS塑料制成薄膜，得到再生PS塑料薄膜，具体包括：
    采用挤出流延成型工艺或吹膜成型工艺将造粒后的废旧PS塑料制成薄膜，得到再生PS塑料薄膜。
  15. 一种制备如权利要求2-12任一项所述的再生PS塑料薄膜的方法，其特征在于，包括：
    将废旧PS塑料和改性材料进行混合；
    将混合后的废旧PS塑料和改性材料进行造粒，得到再生PS塑料；
    将再生PS塑料制成薄膜，得到再生PS塑料薄膜；
    其中，以所述再生PS塑料薄膜总重计，所述废旧PS塑料的含量为大于等于1％且小于100％，所述改性材料的含量为大于0％且小于等于99％。
  16. 如权利要求15所述的再生PS塑料薄膜的方法，其特征在于，所述将再生PS塑料制成薄膜，得到再生PS塑料薄膜，具体包括：
    采用挤出流延成型工艺或吹膜成型工艺将再生PS塑料制成薄膜，得到再生PS塑料薄膜。
  17. 如权利要求15或16所述的再生PS塑料薄膜的方法，其特征在于，在所述采用再生PS塑料制成再生PS塑料薄膜的过程中，加入抗静电剂、阻燃剂和着色剂中的至少一种。
  18. 一种声磁防盗标签外壳，其特征在于，包括封接层以及如权利要求1-12任一项所述的再生PS塑料薄膜，所述再生PS塑料薄膜与所述封接层层叠设置。
  19. 如权利要求18所述的声磁防盗标签外壳，其特征在于，所述再生PS塑料薄膜的厚度为0.20-0.45mm。
  20. 如权利要求18所述的声磁防盗标签外壳，其特征在于，所述声磁防盗标签外壳的厚度为0.23-0.45mm。
  21. 如权利要求18所述的声磁防盗标签外壳，其特征在于，所述封接层为PE膜或PP膜。
  22. 如权利要求18所述的声磁防盗标签外壳，其特征在于，所述封接层的材质包括有1-100％再生的PE膜，或所述封接层的材质包括有1-100％再生的PP膜。
  23. 一种制备如权利要求18-22任一项所述的声磁防盗标签外壳的方法，其特征在于，包括：
    在再生PS塑料薄膜上设置封接层，得到声磁防盗标签外壳材料；其中，所述再生PS塑料薄膜采用如权利要求13-17任一项所述的再生PS塑料薄膜的制备方法制备得到；
    采用所述声磁防盗标签外壳材料制成声磁防盗标签外壳。
  24. 如权利要求23所述的声磁防盗标签外壳的制备方法，其特征在于，所述封接层为PE膜；所述在再生PS塑料薄膜上设置封接层，得到声磁防盗标签外壳材料，具体包括：
    将所述再生PS塑料薄膜与PE膜进行复合，得到复合膜；
    采用50-80℃的热成形工艺将所述复合膜制成声磁防盗软标签的外壳；其中，所述热成形工艺为吸塑成形工艺或凹凸上下模具压塑成形工艺。
  25. 一种声磁防盗标签，其特征在于，包括如权利要求18-22任一项所述的声磁防盗标签外壳。
  26. 如权利要求25所述的声磁防盗标签，其特征在于，所述声磁防盗标签还包括至少一个共振片、封接盖、偏置片、双面胶和分离带，所述声磁防盗标签 外壳的封接层与所述封接盖连接，所述封接层和所述封接盖之间设有空腔，所述共振片容纳于所述空腔内，所述双面胶的一面将所述偏置片固定在所述封接盖上，所述双面胶的另一面与所述分离带连接。
  27. 如权利要求25所述的声磁防盗标签，其特征在于，再生PS塑料的缺口冲击强度为5.7-17.0KJ/m 2，所述再生PS塑料薄膜的厚度为0.20-0.45mm。
  28. 如权利要求25-27任一项所述的声磁防盗标签，其特征在于，用所述声磁防盗标签外壳剪出2mm宽的薄膜长条时，沿所述薄膜长条的长度方向完全对折后再展开所述薄膜长条无脆性折断。
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