CN103331973A - Low temperature resistant and impact resistant casting polypropylene steaming and boiling resistant film - Google Patents
Low temperature resistant and impact resistant casting polypropylene steaming and boiling resistant film Download PDFInfo
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- CN103331973A CN103331973A CN2013102092893A CN201310209289A CN103331973A CN 103331973 A CN103331973 A CN 103331973A CN 2013102092893 A CN2013102092893 A CN 2013102092893A CN 201310209289 A CN201310209289 A CN 201310209289A CN 103331973 A CN103331973 A CN 103331973A
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Abstract
The invention relates to a low temperature resistant and impact resistant casting polypropylene steaming and boiling resistant film. The film is compounded by a corona layer, a core layer and a heat sealing layer, wherein the core layer is disposed between the corona layer and the heat sealing layer. The corona layer is prepared by a propylene block copolymer resin; the core layer is composed of 70-90% of a propylene block copolymer resin, 10-30% of a of a thermoplastic elastomer and 0.2% of a mustard acyl amine slip agent; and the heat sealing layer us composed of 89.7% of a polypropylene block copolymer, 10% of a ethylene-alpha olefin copolymer, 0.15% of a synthetic wollastonite anti-sticking agent and 0.15% of the mustard acyl amine slip agent. The film has the advantages of excellent low temperature resistant performance, large impact strength, good penetration resistant performance, steaming and boiling resistance and the like, and can be sterilized by a pasteuring or boiling method. The film is mainly used for packaging products needed cold storage, and has the characteristics of cold and refrigeration resistance, penetration resistance, impact resistance and the like, so that the film can be widely applied in plastic soft packages in need of cold storage and sterilization.
Description
Technical field
The present invention relates to a kind of polypropylene film of anti-the boiling, especially a kind of low temperature resistant anti-impact type cast polypropylene film of anti-the boiling.
Background technology
In the plastic flexible package application, because some packing articles will carry out deepfreeze, some is packaged in and can runs into different environment temperature situations in the application process in addition, especially winter temperature difference can be very big, temperature as the north is reduced to about-30 ℃ sometimes, in this case, some packing articles will be because of black brittleness the shock resistance variation.Various problems will appear in this moment: 1, the impact resistance of sack is poor, transportation, loading and unloading, shelf are put the destruction that is subjected to external power in the process easily, broken bag very easily occurs, open a bag phenomenon, not only influence the outward appearance of packaging product, can not play the due effect of packing itself simultaneously.2, the cold resistance of frozen food does not reach requirement, under the lower situation of temperature, can not keep the original performance of material, and packaging material are more crisp, and the packaging material mechanical strength is descended, and causes packaging bag to break and ftracture, and more can not satisfy the protective effect to content.3, the puncture resistance of packaging bag, generally be harder after frozen food is freezing, particularly fish, meat products, contain bone and hard objects, the product extruding is easy to make packaging bag to wear out in transportation and the stacking, the packaging bag sealing is damaged, so frozen food is very high to the puncture requirement of packaging bag.
Common this constructed products performance of the many employings of Frozen Food Packaging composite membrane following structure: OPP/LLDPE can reach moistureproof, cold-resistant on the market now, the low-temperature heat-sealing pulling force is strong etc., and cost is relatively economical; The packaging character of this structure of NY/LLDPE can cold-resistantly freeze, shock-resistant, puncture, and cost is higher relatively, packing of product better performances; And the PET/LLDPE structure also has use in freezing series products, but utilization rate is relatively low; Also having a kind of in addition is simple PE bag, for example vegetables packing etc.; Above several prods structure is that the structure of relatively concentrating is used in the cryogenic freezing packing of product of present domestic market.
In above-mentioned packing, employing be LLDPE as the hot sealing layer material, but because the transparency of LLDPE is relatively poor, and because the low boiling resistance of fusing point and Vicat softening point can be also relatively poor.Therefore pack and need the packaging for foodstuff of water boiling resistance or anti-boiling sterilization at visual demanding goods, adopt the LLDPE film will have certain limitation.
Summary of the invention
Technical problems such as the object of the invention provides a kind of low temperature resistant anti-impact type cast polypropylene film of anti-the boiling, adopts LLDPE as the hot sealing layer material to solve existing Frozen Food Packaging composite membrane, and fusing point and Vicat softening point are lower, and the boiling resistance energy is relatively poor.
The present invention is mainly solved the problems of the technologies described above by following technical proposals: a kind of low temperature resistant anti-impact type cast polypropylene film of anti-the boiling, be composited by corona layer, sandwich layer and hot sealing layer, and described sandwich layer is between corona layer, hot sealing layer; Described corona layer is made by the propylene block copolymerized resin, and described sandwich layer is made up of propylene block copolymerized resin 70-90%, thermoplastic elastomer (TPE) 10-30% and mustard acyl acid amide slipping agent 0.2%; Described hot sealing layer material is made up of polypropylene block copolymer 89.7%, ethylene-alpha-olefin copolymer 10%, synthetic wollastonite antitack agent 0.15% and mustard acyl acid amide slipping agent 0.15%.
As preferably, described corona layer, sandwich layer and hot sealing layer three thickness rate layer by layer are 1:3:1.
As preferably, described thermoplastic elastomer (TPE) is the mixture that polyethylene-octene elastomer, ethene and 2-butylene copolymer elastomer constitute by mass ratio 2:1.
As preferably, described polypropylene block copolymer can be one or more combinations of HOPP resin, COPP resin, copolymerization and HOPP resin.
As preferably, described synthetic wollastonite antitack agent is made by 90% polypropylene, 10% wollastonite blend granulation.
As preferably, described mustard acyl acid amide slipping agent is made by 95% polypropylene, high-purity mustard acyl acid amide blend granulation of 5%.
As preferably, described corona laminar surface obtains moistened surface tension force greater than the sided corona treatment value of 38 dyne after high-frequency discharge is handled.
The mixed elastomer that gets of polyethylene-octene elastomer and ethene-2 butylene copolymer elastomers is bigger to the low-temperature impact performance contribution of material among the present invention, this is because play connection, cushioning effect between each composition of elastomer, make system when being subjected to impacting, play dispersion, shock absorbing energy, reduce crazing because of the stressed chance that develops into crackle, thereby improved the impact strength of system.When system was subjected to tension force, because bigger deformation can take place the formed network-like structure of these tie-points, so the elongation at break of system has significant increase, shock resistance strengthened.
Anti-blocking agent can form the concavo-convex of many projections or different lax shapes on the surface of finished films, make the surface of finished films reach certain roughness, stack or roll up when putting together in finished films like this, can allow and retain air in certain amount between each thin layer, thereby effective contact area has reached the effect that prevents film blocking between the minimizing film.
Slipping agent is dispersed in the plastic sheeting by melt extruding, and can migrate to film surface fast at last in producing and using, and forms a smooth layer, reduce the coefficient of friction of film surface, make it not adhesion mutually, order unreels and cuts more smooth and easy, and has good opening.
Patent of the present invention has that resistance to low temperature is good, impact strength is big, puncture resistance is good, also has the advantage of anti-boiling simultaneously, can carry out sterilization treatment by the mode of pasteurization or poach.This film is primarily aimed at the packing of the goods that need refrigeration, has characteristics such as cold-resistant freezing, anti-puncture, shock resistance.Therefore needing can be widely used in the plastic flexible package of deepfreeze and sterilization treatment.
Description of drawings
Fig. 1 is structural representation of the present invention.
The specific embodiment
Below by embodiment, technical scheme of the present invention is described in further detail.Fig. 1 is structural representation of the present invention, as shown in the figure, this low temperature resistant anti-impact type cast polypropylene film of anti-the boiling is composited by corona layer 1, sandwich layer 2 and hot sealing layer 3, its sandwich layer 2 is between corona layer 1, hot sealing layer 3, and corona layer, sandwich layer and hot sealing layer three thickness rate layer by layer are 1:3:1.
Embodiment 1:This low temperature resistant anti-impact type cast polypropylene film of anti-the boiling, its corona layer is made up of the polypropylene block copolymerized resin; Sandwich layer is by the poly-resin 70% of polypropylene block copolymerization, thermoplastic elastomer (TPE) (mixture that polyethylene-octene elastomer, ethene and 2-butylene copolymer elastomer constitute by mass ratio 2:1) 29.8% and mustard acyl acid amide slipping agent (95% polypropylene, high-purity mustard acyl acid amide blend granulation of 5% are made, down together) 0.2% composition; Hot sealing layer is made up of polypropylene block copolymer 89.7%, ethylene-alpha-olefin copolymer 10%, synthetic wollastonite antitack agent (90% polypropylene, 10% wollastonite blend granulation are made, down with) 0.15%, mustard acyl acid amide slipping agent 0.15%.Above-mentioned trilaminate material carries out fusion through three single screw extrusion machines respectively, carries out film forming through block of ingredient connector, T pattern coextrusion head and curtain coating cooling again.Product follow-up through cooling and shaping, thickness detection, sided corona treatment, rolling, Ageing Treatment, cut and pack, obtain final products.Among the above embodiment, the corona laminar surface obtains moistened surface tension force greater than the sided corona treatment value of 38 dyne after high-frequency discharge is handled.
Embodiment 2:This low temperature resistant anti-impact type cast polypropylene film of anti-the boiling, its corona layer is made up of boiling level propylene binary random vinyl chloride; Sandwich layer is made up of polypropylene homo resin 79.8%, thermoplastic elastomer (TPE) (mixture that polyethylene-octene elastomer, ethene and 2-butylene copolymer elastomer constitute by mass ratio 2:1) 20% and mustard acyl acid amide slipping agent 0.2%; Hot sealing layer is made up of polypropylene binary random copolymer 89.7%, ethylene-alpha-olefin copolymer 10%, synthetic wollastonite antitack agent 0.15%, mustard acyl acid amide slipping agent 0.15%.Above-mentioned trilaminate material carries out fusion through three single screw extrusion machines respectively, carries out film forming through block of ingredient connector, T pattern coextrusion head and curtain coating cooling again.Product follow-up through cooling and shaping, thickness detection, sided corona treatment, rolling, Ageing Treatment, cut and pack, obtain final products.Among the above embodiment, the corona laminar surface obtains moistened surface tension force greater than the sided corona treatment value of 38 dyne after high-frequency discharge is handled.
Embodiment 3:This low temperature resistant anti-impact type cast polypropylene film of anti-the boiling, its corona layer is made up of boiling level propylene binary random vinyl chloride; Sandwich layer is made up of polypropylene homo resin 89.8%, thermoplastic elastomer (TPE) (mixture that polyethylene-octene elastomer, ethene and 2-butylene copolymer elastomer constitute by mass ratio 2:1) 10% and mustard acyl acid amide slipping agent 0.2%; Hot sealing layer is made up of polypropylene terpolymer 89.7%, ethylene-alpha-olefin copolymer 10%, synthetic wollastonite antitack agent 0.15%, mustard acyl acid amide slipping agent 0.15%.Above-mentioned trilaminate material carries out fusion through three single screw extrusion machines respectively, carries out film forming through block of ingredient connector, T pattern coextrusion head and curtain coating cooling again.Product follow-up through cooling and shaping, thickness detection, sided corona treatment, rolling, Ageing Treatment, cut and pack, obtain final products.Among the above embodiment, the corona laminar surface obtains moistened surface tension force greater than the sided corona treatment value of 38 dyne after high-frequency discharge is handled.
Embodiment 4:This low temperature resistant anti-impact type cast polypropylene film of anti-the boiling, its corona layer is made up of boiling level propylene binary random vinyl chloride; Sandwich layer is made up of polypropylene binary copolymerization resin 80%, thermoplastic elastomer (TPE) (mixture that polyethylene-octene elastomer, ethene and 2-butylene copolymer elastomer constitute by mass ratio 2:1) 19.8% and mustard acyl acid amide slipping agent 0.2%; Hot sealing layer is made up of polypropylene terpolymer 89.7%, ethylene-alpha-olefin copolymer 10%, synthetic wollastonite antitack agent 0.15%, mustard acyl acid amide slipping agent (95% polypropylene, high-purity mustard acyl acid amide blend granulation of 5% are made) 0.15%.Above-mentioned trilaminate material carries out fusion through three single screw extrusion machines respectively, carries out film forming through block of ingredient connector, T pattern coextrusion head and curtain coating cooling again.Product follow-up through cooling and shaping, thickness detection, sided corona treatment, rolling, Ageing Treatment, cut and pack, obtain final products.Among the above embodiment, the corona laminar surface obtains moistened surface tension force greater than the sided corona treatment value of 38 dyne after high-frequency discharge is handled.
Raw material of the present invention all is to buy on the market, mainly is selected from DOW Chemical (DOW), E.I.Du Pont Company (DUPONT), Basel (BASELL), Mitsui Chemicals (MITSUI CHEMICALS), section and rises (KRATON), Samsung Dao Daer (SUMSUNG TOTAL), Exxon (EXXON), the general renowned companies such as (CONSTAB) of Constant.The twin-screw granulating extruder that relates among the embodiment adopts the equipment of Nanjing Jie Ente company, and coextrusion casting equipment adopts the three-layer co-extruded curtain coating production line of Austrian Lenzin company (being SML company).
Comparative Examples:This low temperature resistant anti-impact type cast polypropylene film of anti-the boiling, its corona layer is made up of boiling level propylene binary random vinyl chloride; Sandwich layer is made up of polypropylene homo resin 99.8% and mustard acyl acid amide slipping agent 0.2%; Hot sealing layer is made up of polypropylene terpolymer 89.7%, ethylene-alpha-olefin copolymer 10%, synthetic wollastonite antitack agent 0.15%, mustard acyl acid amide slipping agent 0.15%.Above-mentioned trilaminate material carries out fusion through three single screw extrusion machines respectively, carries out film forming through block of ingredient connector, T pattern coextrusion head and curtain coating cooling again.Product follow-up through cooling and shaping, thickness detection, sided corona treatment, rolling, Ageing Treatment, cut and pack, obtain final products.
The item following points that production process of the present invention pays particular attention to: one, the dust Control of Impurities of raw material: raw material is from the spice to the conveying, requirement is carried out under air-proof condition, the curtain coating workshop of extruding with film between raw material storage workshop and spice skip car isolates, and avoids the dust of raw material to enter casting unit; Two, melt extrude crystalline substance point and the charing point control of process: every extruder and die head connector have filter, filter is the best in the mode that adopts cascade filtration, filter divides coarse filtration and smart filters two sections, thereby avoids impurity such as brilliant some charing point to enter die head to greatest extent; Three, deflector roll requires: the casting unit deflector roll all to the rolling unit need pass through special surface treatment; Four, workshop environmental requirement: production process requires to carry out in dust-free workshop inside, the workshop degree of purification requires more than 1000 grades, wherein require from the curtain coating cooling unit to the rolling unit to adopt poly (methyl methacrylate) plate to isolate, the production operation personnel need dress special garment for clean room, headgear and mouth mask as far as possible; Five, divided thin film butt formula: the mode of cutting is taked online cutting, and unreels process to the infringement of film when avoiding the film secondary to cut.Six, the crystallization process of heating again of film: before rolling, need have a heating and cooling device that film is heated again, 50 ℃-100 ℃ of heating-up temperatures, its objective is in order to accelerate the film recrystallization, reduce the film curing time, thereby make the polymer molecular chain typing of fully being extended, avoid the rolling rear film to shrink distortion.
In order to verify effect of the present invention, the finished product that each embodiment and Comparative Examples are made compares test, its result such as following table:
Result of the test shows: the low temperature resistant anti-impact type cast polypropylene of the present invention film of anti-the boiling mainly contains following characteristics: 1. elastic modelling quantity is big, the deflection height, and its elastic modelling quantity and hot strength are all greater than general thin; 2. initial heat-sealing temperature is low; 3. glossiness is fine, and mist degree is excellent, and the properties of transparency of product is better; 4. low temperature impact strength height, the scope of application is wide.
Claims (7)
1. a low temperature resistant anti-impact type cast polypropylene film is composited by corona layer, sandwich layer and hot sealing layer, it is characterized in that described sandwich layer is between corona layer, hot sealing layer; Described corona layer is made by the propylene block copolymerized resin, and described sandwich layer is made up of propylene block copolymerized resin 70-90%, thermoplastic elastomer (TPE) 10-30% and mustard acyl acid amide slipping agent 0.2%; Described hot sealing layer material is polypropylene block copolymer 89.7%, ethylene-alpha-olefin copolymer 10%, synthetic silica antitack agent 0.15% and mustard acyl acid amide slipping agent 0.15%.
2. low temperature resistant anti-impact type cast polypropylene film according to claim 1, it is characterized in that described corona layer, sandwich layer and hot sealing layer three layer by layer thickness rate be 1:3:1.
3. low temperature resistant anti-impact type cast polypropylene film according to claim 1 and 2 is characterized in that described thermoplastic elastomer (TPE) is the mixture that polyethylene-octene elastomer, ethene and 2-butylene copolymer elastomer constitute by mass ratio 2:1.
4. low temperature resistant anti-impact type cast polypropylene film according to claim 1 and 2 is characterized in that described polypropylene block copolymer can be a kind of or several mixtures of HOPP resin, the copolymerization of COPP resin and HOPP resin.
5. low temperature resistant anti-impact type cast polypropylene film according to claim 1 and 2 is characterized in that described synthetic wollastonite antitack agent made by 90% polypropylene, 10% wollastonite blend granulation.
6. low temperature resistant anti-impact type cast polypropylene film according to claim 1 and 2 is characterized in that described mustard acyl acid amide slipping agent made by 95% polypropylene, 5% mustard acyl acid amide blend granulation.
7. low temperature resistant anti-impact type cast polypropylene film according to claim 1 is characterized in that described corona laminar surface after high-frequency discharge is handled, obtains moistened surface tension force greater than the sided corona treatment value of 38 dyne.
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| CN201310014062.3 | 2013-01-15 | ||
| CN2013100140623 | 2013-01-15 | ||
| CN201310209289.3A CN103331973B (en) | 2013-01-15 | 2013-05-31 | The low temperature resistant anti-impact type cast polypropylene film of resistance to boiling |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103203933A (en) * | 2013-03-23 | 2013-07-17 | 湖北慧狮塑业股份有限公司 | Low-temperature-resistant impact-resistant CPP (cast polypropylene) cooking-resistant film |
| CN107757032A (en) * | 2017-11-02 | 2018-03-06 | 上海紫江新材料科技有限公司 | A kind of ultrathin aluminum plastic film polypropylene screen and preparation method thereof |
| CN109466147A (en) * | 2018-12-28 | 2019-03-15 | 大连盛林薄膜新材料有限公司 | A kind of thermophilic digestion type cast polypropylene film |
| CN110948986A (en) * | 2019-12-16 | 2020-04-03 | 嘉兴鹏翔包装材料有限公司 | Agricultural high-toughness VMCPP aluminum-plated film and preparation method thereof |
| CN111361255A (en) * | 2020-04-07 | 2020-07-03 | 深圳日高胶带新材料有限公司 | Environment-friendly automotive interior adhesive tape |
| CN113752599A (en) * | 2021-06-21 | 2021-12-07 | 徐州宏恩包装新材料有限公司 | High-temperature cooking film for food packaging and preparation method thereof |
| CN115139615A (en) * | 2022-08-25 | 2022-10-04 | 河北泰达包装材料有限公司 | Flexible package modified CPP film and production method thereof |
| CN115991033A (en) * | 2021-10-20 | 2023-04-21 | 中国石油化工股份有限公司 | High-adhesion high-impact polypropylene composite film and preparation method and application thereof |
| CN115991041A (en) * | 2021-10-20 | 2023-04-21 | 中国石油化工股份有限公司 | Electromagnetic shielding polypropylene composite film and preparation method and application thereof |
| CN115991034A (en) * | 2021-10-20 | 2023-04-21 | 中国石油化工股份有限公司 | Polypropylene composite film and preparation method and application thereof |
| CN115991042A (en) * | 2021-10-20 | 2023-04-21 | 中国石油化工股份有限公司 | High-adhesion high-impact polypropylene composite film and preparation method and application thereof |
| CN115991040A (en) * | 2021-10-20 | 2023-04-21 | 中国石油化工股份有限公司 | Low-haze high-impact-resistance coloring heat-sealing polypropylene composite film and preparation method and application thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203933A (en) * | 2013-03-23 | 2013-07-17 | 湖北慧狮塑业股份有限公司 | Low-temperature-resistant impact-resistant CPP (cast polypropylene) cooking-resistant film |
| CN107757032A (en) * | 2017-11-02 | 2018-03-06 | 上海紫江新材料科技有限公司 | A kind of ultrathin aluminum plastic film polypropylene screen and preparation method thereof |
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| CN110948986A (en) * | 2019-12-16 | 2020-04-03 | 嘉兴鹏翔包装材料有限公司 | Agricultural high-toughness VMCPP aluminum-plated film and preparation method thereof |
| CN111361255A (en) * | 2020-04-07 | 2020-07-03 | 深圳日高胶带新材料有限公司 | Environment-friendly automotive interior adhesive tape |
| CN113752599A (en) * | 2021-06-21 | 2021-12-07 | 徐州宏恩包装新材料有限公司 | High-temperature cooking film for food packaging and preparation method thereof |
| CN115991034A (en) * | 2021-10-20 | 2023-04-21 | 中国石油化工股份有限公司 | Polypropylene composite film and preparation method and application thereof |
| CN115991033A (en) * | 2021-10-20 | 2023-04-21 | 中国石油化工股份有限公司 | High-adhesion high-impact polypropylene composite film and preparation method and application thereof |
| CN115991041A (en) * | 2021-10-20 | 2023-04-21 | 中国石油化工股份有限公司 | Electromagnetic shielding polypropylene composite film and preparation method and application thereof |
| CN115991042A (en) * | 2021-10-20 | 2023-04-21 | 中国石油化工股份有限公司 | High-adhesion high-impact polypropylene composite film and preparation method and application thereof |
| CN115991040A (en) * | 2021-10-20 | 2023-04-21 | 中国石油化工股份有限公司 | Low-haze high-impact-resistance coloring heat-sealing polypropylene composite film and preparation method and application thereof |
| CN115991034B (en) * | 2021-10-20 | 2024-08-06 | 中国石油化工股份有限公司 | Polypropylene composite film and preparation method and application thereof |
| CN115991033B (en) * | 2021-10-20 | 2024-09-17 | 中国石油化工股份有限公司 | High-adhesion high-impact polypropylene composite film and preparation method and application thereof |
| CN115991042B (en) * | 2021-10-20 | 2024-09-17 | 中国石油化工股份有限公司 | High-adhesion high-impact polypropylene composite film and preparation method and application thereof |
| CN115139615A (en) * | 2022-08-25 | 2022-10-04 | 河北泰达包装材料有限公司 | Flexible package modified CPP film and production method thereof |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Low temperature and impact resistant cast polypropylene cooking resistant film Effective date of registration: 20220119 Granted publication date: 20160427 Pledgee: Bank of China Limited Xiantao branch Pledgor: Hubei Huishi Plastics Industry Co.,Ltd. Registration number: Y2022420000019 |