CN101096129B - Method for manufacturing polystyrene torsion film - Google Patents
Method for manufacturing polystyrene torsion film Download PDFInfo
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- CN101096129B CN101096129B CN200710028808A CN200710028808A CN101096129B CN 101096129 B CN101096129 B CN 101096129B CN 200710028808 A CN200710028808 A CN 200710028808A CN 200710028808 A CN200710028808 A CN 200710028808A CN 101096129 B CN101096129 B CN 101096129B
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- styrene
- polystyrene
- butadiene
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- diaphragm
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
- B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
- B29C55/14—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively
- B29C55/143—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively firstly parallel to the direction of feed and then transversely thereto
-
- 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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- 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
- 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
-
- 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
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0089—Impact strength or toughness
-
- 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
-
- 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
- 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
- C08L25/08—Copolymers of styrene
- C08L25/12—Copolymers of styrene with unsaturated nitriles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
- C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Laminated Bodies (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a producing method for no-rebound polystyrene torsion film used for food package. Polystyrene resin, high impact polystyrene resin or modified polystyrene resin is mixed with toughening agent and so on in plasticization. The mixture is melted and extruded out to form single-layer or multiple-layer film. The film is drawn in horizontal and vertical direction to become finished product. The torsion film is provided with better mechanical characteristic, high intensity, big rigidity, no rebound elasticity. The torsion film is a better torsion film and can take the place of PVC torsion film, glass paper or PET torsion film as packaging material.
Description
Technical field
The present invention relates to a kind of manufacture method of packaging material, specifically is the manufacture method that is used for the no resilience polystyrene torsion film of packaging for foodstuff.
Background technology
The torsion film that packaging for foodstuff is at present used is PVC torsion film, glassine paper and PET torsion film.The PVC torsion film has good chemical stability, is not easy by acid and alkali corrosion, but to light, thermally labile, be subjected to easily light, heat particularly action of ultraviolet radiation emit hydrogen chloride and separate out plasticizer, pollute packed article; In addition, the PVC material is difficult to recycle, and burns also can't convert to and can utilize thermal source, contaminated soil and underground water when handling as garbage loading embeading, burning disposal then produces the dioxin carcinogen, and human body and environment are caused adverse effect, so the use of PVC film is subjected to worldwide criticism.Though glassine paper itself does not have toxicity, its production process is the same with papermaking a large amount of runoff water can to occur, and environment is caused great influence, and the glassine paper price is also higher.The PET torsion film is better than PVC torsion film and glassine paper aspect environmental protection, but density of material is big, price height, and kink poor performance.
Polystyrene material is tasteless nontoxic, and price is low, and it is simple to reclaim technology, and used goods can recycling use, does not produce harmful material in the recycling burning process, is the preferred material that replaces PVC torsion film, glassine paper and PET torsion film.But because the production technology of polystyrene torsion film is difficult to grasp, the production method of polystyrene torsion film is not appeared in the newspapers so far yet.Though the polystyrene heat shrink films that is used to pack is a kind of known product,, can not use as torsion film because resilience is excessive.
Summary of the invention
The purpose of this invention is to provide a kind of manufacture method of not having elastic polystyrene torsion film, thus realize with nontoxic, polystyrene torsion film substitutes PVC torsion film, glassine paper or PET torsion film as packaging material cheaply.
The present invention includes the following step:
A. prepare material by weight percentage: 60～97% melt index, 0.6～5g/10min, one or more of the polystyrene resin that Vicat softening point is 102～108 ℃, high-impact polystyrene resin or modified polystyrene resin, 1～10% flexibilizer, 0～30% reclaimed materials, material evenly mixes, at one or an above extruder plastifying fusion, extrude at T shape die head by the flow of setting then and form the superimposed co-extrusion diaphragm of single or multiple lift of setting thickness, diaphragm is the chilling typing on 45～90 ℃ chill roll;
B. the diaphragm after 100～140 ℃ of preheat roll preheatings carries out 1: 1.5～5 times longitudinal stretching, with 60～95 ℃ chill roll cooling and shaping;
C. the diaphragm behind the longitudinal stretching carries out 1: 3～6 times cross directional stretch after the preheating in 110～140 ℃ baking oven, again at 70～90 ℃ of following cooling and shapings, cuts edge, and carries out sided corona treatment, and rolling becomes finished product.
Among the present invention, polystyrene comprises the homopolymers or the copolymer of styrene, methyl styrene, styrene derivative.
High impact polystyrene is that one or more that add butadiene rubber, butadiene-styrene rubber or acrylonitrile-butadiene rubber in polystyrene carry out the blend graft modification, the polystyrene continuous phase of formation and the blend composition of rubber decentralized photo.The blend composition of weight ratio 90～95% General Purpose Polystyrenres and 5～10% butadiene rubbers preferably.
MPS is styrene and butadiene, isoprene, acrylonitrile, maleic anhydride, methacrylate, the homopolymerization of one or more formation in the maleimide, block or graft copolymer, preferably: BS, isoprene-styrol copolymer, acrylonitritrile-styrene resin, methacrylate butadi ene styrene copolymer, methacrylate-styrol copolymer, styrene-maleic anhydride copolymer, styrene-maleimide copolymer, MABS, acrylonitrile-butadiene-styrene copolymer.
Flexibilizer comprises styrene-suitable butadiene copolymer, the styrene-isoprene copolymer, and styrene-along hycar, polystyrene-poly is along the butadiene blend composition.Preferably: the copolymer of the degree of polymerization 1000～3000 that the suitable butadiene copolymer of 40～85wt% styrene and 15～60wt% forms; Perhaps the degree of polymerization that forms along butadiene and 10～20wt% acrylonitrile compolymer of 60～80wt% styrene, 10～25wt% is 500～1500 copolymer; Perhaps 40～85wt% polystyrene and 15～60wt% gather the blend along butadiene, and wherein the polystyrene degree of polymerization 500～2500, and the poly-degree of polymerization along butadiene is 200～1500.Be more preferably the copolymer that weight ratio 70～80wt% styrene and 20～30wt% butadiene copolymer form.
Polystyrene resin of the present invention, high-impact polystyrene resin or modified polystyrene resin, and flexibilizer preferably uses transparent material and is easy to the transparent membrane accepted by people so that form.The melt index of the preferred styrene resin of the present invention, high-impact polystyrene resin or modified polystyrene resin is 1.2～2.5g/10min, and Vicat softening point is 104～106 ℃.
Reclaimed materials is the leftover pieces of diaphragm through cutting edge and occurring after the biaxial tension, through pulverizing, filters the cleaning PS particle that granulation is made.Add a certain amount of reclaimed materials, can reduce production costs.
Among the present invention, diaphragm preferably by constituting more than three layers or three layers, correspondingly needs the extruder more than two or two, and wherein two superficial layers can use an extruder to finish the plastifying fusion of material up and down.The lubricant that can also add 0.05～1% (weight) in the material of top layer, the middle one or more layers antistatic additive that can also add 1～5% (weight).Lubricant can use the lubricant of the commercially available PS of being used for plastic processing, as C
12～C
20Higher aliphatic, to reduce film friction coefficient.Antistatic additive also can use the antistatic additive of the commercially available PS of being used for plastic processing, as polyoxyethylene groups quaternary ammonium second inner salt oxide, ionic surfactant, can improve the film antistatic property after the adding.
Among the present invention, preferred 125～135 ℃ of the preheat temperature of longitudinal stretching and cross directional stretch, preferably 1: 1.5～3 times of longitudinal stretching multiplying powers, preferably 1: 4～5 times of cross directional stretch multiplying powers.
In described steps A, preferred 65～75 ℃ of chill-roll temperature.Among the step B, preferred 65～75 ℃ of cooling and shaping temperature.Among the step C, preferred 70～80 ℃ of cooling and shaping temperature.
The present invention makes polymer molecular chain elongate at this both direction at the vertical and horizontal drawing process, directed, obtain mechanical property preferably, the intensity height, rigidity is big, no resilience, hot strength height (vertical MD 〉=35MPa, horizontal TD 〉=50MPa), elastic modelling quantity big (vertical MD 〉=1800MPa, horizontal TD 〉=1800MPa), mist degree little (≤2.9%), glossiness height (45 °) (〉=121%), be a kind of torsion film preferably, film thickness 15～50 μ m, wherein superficial layer 3～10 μ m, compare with the PVC torsion film, avirulence of the present invention, easily degraded, kink property is strong, it is effective to aluminize, good glossiness and transparency are arranged, and compare price with glassine paper low approximately by 1/3, can substitute the PVC torsion film, glassine paper or PET torsion film use as packaging material.
The specific embodiment
Embodiment 1
Material therefor:
High impact polystyrene: transparent, melt index 1.5g/10min, 105 ℃ of Vicat softening points are by weight 92% polystyrene and 8% butadiene rubber blend composition;
Flexibilizer: the K resin of the Dutch KR-03 of PHILIPS Co. model, transparent, be the mean molecule quantity about 1.8 * 10 that forms by 75% styrene and 25% butadiene copolymer
5Product;
Antistatic additive: the model that Chinese Shantou Supreme Being Wei Si company produces is the AMS-576 product;
Lubricant: the model that Exxon Neftegas Limited produces is the CASS112 product.
Above-mentioned material is prepared the intermediate layer material by weight: 92% high impact polystyrene, 5% flexibilizer, 3% antistatic additive; Superficial layer material: 94.5% high impact polystyrene, 5% flexibilizer, 0.5% lubricant.
After each layer material evenly mixes, pass through apparatus for separating metals respectively, the metal fillings or the particle separation of carrying secretly in the material are come out, deliver to two double screw extruders (also can be single screw extrusion machine) plastifying fusion respectively then, the evenly mixing and conveying of 210 ℃ of melt temperatures, melt quilt under screw rod rotates at a high speed.At course of conveying, the gas that lower-molecular substance that gasifies in the melt and decomposition are come out is pumped into condenser system by the steam vent of extruder by vavuum pump, and lower-molecular substance is separated.Refilter and remove plasticizing bad material and impurity, guarantee that the height of melt is pure.Melt closes by the flow of each layer setting typing surface layer by die lip in T shape die head and extrudes, and becomes the even diaphragm that constitutes by three layers, and again through highly bright and clean, temperature is that 70 ℃ chill roll chilling typing becomes diaphragm and carries out thickness measuring.Diaphragm thickness is regulated by die head and is determined.
Diaphragm after the chilling typing is through 130 ℃ multiple tracks preheat roll preheating, and the speed difference of utilizing roller and quick roll at a slow speed through 70 ℃ of chill roll cooling and shapings, is finished longitudinal stretching by 1: 2.5 stretching ratio one-off drawing moulding.
Diaphragm behind the longitudinal stretching is preheated to 130 ℃, utilizes adjustable track by chain folder traction diaphragm, finishes cross directional stretch by 1: 4.5 stretching ratio, then at 75 ℃ of following cooling and shapings.The cross directional stretch process will be controlled the thickness of the diaphragm after the stretching, and is underproof through thickness measurement online instrument mensuration, as waste disposal.
Stretched film excises its both sides with bead cutter earlier, carries out high-frequency corona with corona machine then and handles, to increase the adhesive force and the frictional force of printing-ink.Bundled through the rolling on winder of the film after the sided corona treatment, place a period of time naturally then, carry out Ageing Treatment, make the performance trend of product stable.
Biaxially oriented polystyrene film after Ageing Treatment utilizes cutting machine to cut into the specification of customer requirements, packs then, promptly obtains biaxially oriented polystyrene torsion film finished product.
Above-mentioned torsion film thickness 40 μ m, each 5 μ m of two surface layer thicknesses wherein, finished product after testing, the vertical MD:56.3MPa of hot strength, laterally TD:77.1MPa, the vertical MD:2899MPa of elastic modelling quantity, horizontal TD:3439MPa, mist degree: 2.9%, glossiness (45 °): 121%, not having resilience, is the torsion film of better performances.
Embodiment 2
Material therefor:
MPS: transparent, melt index 2.5g/10min, 105 ℃ of Vicat softening points are by weight the copolymer of 70% styrene, 20% butadiene and 10% acrylonitrile;
Reclaimed materials: the product after the stretching is remaining leftover pieces after side cut obtains finished product, through pulverizing the cleaning PS particle that fusion, filtration, granulation are made;
Flexibilizer, antiblocking agent, antistatic additive, lubricant are identical with embodiment 1.
Above-mentioned material is prepared the intermediate layer material by weight: 75% MPS, 8% flexibilizer, 15% reclaimed materials, 2% antistatic additive; Superficial layer material: 91.5% MPS, 8% flexibilizer, 0.5% lubricant.
Processing step is identical with embodiment 1, stretching condition:
70 ℃ of chill-roll temperature after T shape die head is extruded;
135 ℃ of longitudinal stretching preheat roll temperature, stretching ratio 1: 2.0,70 ℃ of longitudinal stretching cooling and shaping temperature;
135 ℃ of cross directional stretch preheat temperatures, stretching ratio 1: 4.5,75 ℃ of cross directional stretch cooling and shaping temperature.
The torsion film thickness 28 μ m that make, each 5 μ m of two surface layer thicknesses up and down wherein, finished product is after testing, the vertical MD:52.8MPa of hot strength, horizontal TD:75.2MPa, the vertical MD:2853MPa of elastic modelling quantity, horizontal TD:3408MPa, mist degree: 2.8%, glossiness (45 °): 122.5%.
Embodiment 3
Material therefor:
High impact polystyrene: transparent, melt index 2.5g/10min, 105 ℃ of Vicat softening points are by weight 90% styrene and 10% copolymer along butadiene, the degree of polymerization 1500.
Reclaimed materials, flexibilizer, antiblocking agent, antistatic additive, lubricant are identical with embodiment 2.
Above-mentioned material is prepared the intermediate layer material by weight: 75.5% high impact polystyrene, 8% flexibilizer, 10% reclaimed materials, 4% antistatic additive, 0.5% lubricant.
Extruded by a double screw extruder plastifying fusion and to form the individual layer diaphragm, other processing step is identical with embodiment 1, stretching condition:
70 ℃ of chill-roll temperature after T shape die head is extruded;
135 ℃ of longitudinal stretching preheat roll temperature, stretching ratio 1: 2.0,70 ℃ of longitudinal stretching cooling and shaping temperature;
135 ℃ of cross directional stretch preheat temperatures, stretching ratio 1: 4.5,75 ℃ of cross directional stretch cooling and shaping temperature.
The torsion film thickness 30 μ m that make, finished product after testing, the vertical MD:53.5MPa of hot strength, horizontal TD:74.3MPa, the vertical MD:2898MPa of elastic modelling quantity, horizontal TD:3512MPa, mist degree: 2.9%, glossiness (45 °): 122%.
Embodiment 4
Material therefor:
Polystyrene: transparent, melt index 2g/10min, 105 ℃ of Vicat softening points.
Reclaimed materials, flexibilizer, antiblocking agent, antistatic additive, lubricant are identical with embodiment 2.
Above-mentioned material is prepared the intermediate layer material by weight: 75% high impact polystyrene, 10% flexibilizer, 10% reclaimed materials, 5% antistatic additive.Superficial layer material: 89.5% embodiment, 1 described high impact polystyrene, 10% flexibilizer, 0.5% lubricant.
Processing step is identical with embodiment 1, stretching condition:
70 ℃ of chill-roll temperature after T shape die head is extruded;
135 ℃ of longitudinal stretching preheat roll temperature, stretching ratio 1: 2.0,70 ℃ of longitudinal stretching cooling and shaping temperature:
135 ℃ of cross directional stretch preheat temperatures, stretching ratio 1: 4.5,75 ℃ of cross directional stretch cooling and shaping temperature.
The torsion film thickness 20 μ m that make, each 3 μ m of two surface layer thicknesses up and down wherein, finished product is after testing, the vertical MD:52MPa of hot strength, horizontal TD:77.8MPa, the vertical MD:2931MPa of elastic modelling quantity, horizontal TD:3388MPa, mist degree: 2.7%, glossiness (45 °): 123%.
Claims (10)
1. the manufacture method of a polystyrene torsion film is characterized in that, comprises the following steps:
A. prepare material by weight percentage: 60～97% melt index, 0.6～5g/10min, the polystyrene resin that Vicat softening point is 102～108 ℃, 1～10% flexibilizer, 0～30% reclaimed materials, material evenly mixes, at one or an above extruder plastifying fusion, to extrude at T shape die head by the flow of setting then and form the superimposed co-extrusion diaphragm of single or multiple lift of setting thickness, diaphragm is the chilling typing on 45～90 ℃ chill roll;
B. the diaphragm after 100～140 ℃ of preheat roll preheatings carries out 1: 1.5～5 times longitudinal stretching, with 60～95 ℃ chill roll cooling and shaping;
C. the diaphragm behind the longitudinal stretching carries out 1: 3～6 times cross directional stretch after the preheating in 110～140 ℃ baking oven, again at 70～90 ℃ of following cooling and shapings, cuts edge, and carries out sided corona treatment, and rolling becomes finished product;
Described polystyrene resin is the homopolymers or the copolymer of styrene, methyl styrene, styrene derivative, or in polystyrene, add butadiene rubber, butadiene-styrene rubber or acrylonitrile-butadiene rubber one or more carry out the blend graft modification, the polystyrene continuous phase that forms and the blend composition of rubber decentralized photo, or homopolymerization, block or the graft copolymer of one or more formation in styrene and butadiene, isoprene, acrylonitrile, maleic anhydride, methacrylate, the maleimide, or multiple composition in the listed material;
Described flexibilizer is to be selected from one or more of following material: styrene-and along butadiene copolymer, the styrene-isoprene copolymer, styrene-along hycar, polystyrene-poly is along the butadiene blend composition.
2. according to the described method of claim 1, it is characterized in that the melt index 1.2～2.5g/10min of described polystyrene resin, 104～106 ℃ of Vicat softening points.
3. according to the described method of claim 1, it is characterized in that described polystyrene resin is a transparent material.
4. according to the described method of claim 1, it is characterized in that described flexibilizer is the copolymer of the degree of polymerization 1000～3000 that forms along butadiene or isoprene copolymer by weight 40～85% styrene and 15～60%; Perhaps the degree of polymerization that forms along butadiene and 10～20% acrylonitrile compolymers of 60～80% styrene, 10～25% is 500～1500 copolymer.
5. according to the described method of claim 1, it is characterized in that, described flexibilizer is that wherein the polystyrene degree of polymerization 500～2500 by weight 40～85% polystyrene and 15～60% poly-blend compositions along butadiene, and the poly-degree of polymerization along butadiene is 200～1500.
6. according to the described method of claim 4, it is characterized in that described flexibilizer is by weight 70～80% styrene and 20～30% copolymers along butadiene copolymer formation.
7. according to the described method of claim 1, it is characterized in that, described diaphragm is by constituting more than three layers or three layers, wherein also contains percentage by weight in two superficial layer materials and be 0.05～1% lubricant, and the middle one or more layers percentage by weight that also contains is 1～5% antistatic additive.
8. according to the described method of claim 1, it is characterized in that 1: 1.5～3 times of the longitudinal stretching multiplying powers of described diaphragm, 1: 4～5 times of cross directional stretch multiplying powers.
9. according to the described method of claim 1, it is characterized in that described longitudinal stretching and cross directional stretch preheat temperature are 125～135 ℃.
10. according to the described method of claim 1, it is characterized in that 65～75 ℃ of the chill-roll temperature of described steps A, 65～75 ℃ of the cooling and shaping temperature of step B, 70～80 ℃ of the cooling and shaping temperature of step C.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710028808A CN101096129B (en) | 2007-06-19 | 2007-06-19 | Method for manufacturing polystyrene torsion film |
| PCT/CN2007/002217 WO2008154777A1 (en) | 2007-06-19 | 2007-07-20 | A method for preparing a torsion film of polystyrene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710028808A CN101096129B (en) | 2007-06-19 | 2007-06-19 | Method for manufacturing polystyrene torsion film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101096129A CN101096129A (en) | 2008-01-02 |
| CN101096129B true CN101096129B (en) | 2010-05-19 |
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ID=39010304
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710028808A Expired - Fee Related CN101096129B (en) | 2007-06-19 | 2007-06-19 | Method for manufacturing polystyrene torsion film |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101096129B (en) |
| WO (1) | WO2008154777A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101096129B (en) * | 2007-06-19 | 2010-05-19 | 广东华业包装材料有限公司 | Method for manufacturing polystyrene torsion film |
| CN102218869B (en) * | 2011-03-23 | 2016-04-13 | 河北洋浦包装材料有限公司 | A kind of packaging film |
| CN102848569B (en) * | 2012-10-03 | 2014-12-10 | 广东华业包装材料有限公司 | Production method of two-way stretched thin film made of 3-hydroxybutyrate-4-hydroxybutyrate copolymer |
| CN103044797A (en) * | 2013-01-22 | 2013-04-17 | 贵州省复合改性聚合物材料工程技术研究中心 | Transparent K glue composite AS (Acrylonitrile-Styrene Copolymers) alloy material and preparation method thereof |
| CN103642142A (en) * | 2013-09-29 | 2014-03-19 | 桐城市福润包装材料有限公司 | Production technology for polystyrene film for packaging food |
| CN104191633B (en) * | 2014-08-27 | 2017-02-15 | 桂林电器科学研究院有限公司 | Cold processing process and polyimide film production line for manufacturing polyimide film |
| CN104527101A (en) * | 2014-11-26 | 2015-04-22 | 界首市天鸿包装材料有限公司 | Production technology for R-PVC tangle film |
| CN108044919B (en) * | 2017-12-08 | 2022-08-12 | 无锡宏义高分子材料科技有限公司 | Secondary extension process of PVC (polyvinyl chloride) adhesive tape and application thereof |
| CN113121924A (en) * | 2021-04-13 | 2021-07-16 | 安徽瑞诺包装有限公司 | High-strength plastic bag processing technology |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2585971A1 (en) * | 2004-11-01 | 2006-05-11 | Asahi Kasei Chemicals Corporation | Easy-to-open bag |
| CN101096129B (en) * | 2007-06-19 | 2010-05-19 | 广东华业包装材料有限公司 | Method for manufacturing polystyrene torsion film |
-
2007
- 2007-06-19 CN CN200710028808A patent/CN101096129B/en not_active Expired - Fee Related
- 2007-07-20 WO PCT/CN2007/002217 patent/WO2008154777A1/en active Application Filing
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| WO2008154777A1 (en) | 2008-12-24 |
| CN101096129A (en) | 2008-01-02 |
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