CN102922850A - Biaxially-oriented polypropylene (BOPP) tangle membrane and preparation method thereof - Google Patents
Biaxially-oriented polypropylene (BOPP) tangle membrane and preparation method thereof Download PDFInfo
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- CN102922850A CN102922850A CN2012104448041A CN201210444804A CN102922850A CN 102922850 A CN102922850 A CN 102922850A CN 2012104448041 A CN2012104448041 A CN 2012104448041A CN 201210444804 A CN201210444804 A CN 201210444804A CN 102922850 A CN102922850 A CN 102922850A
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Abstract
The invention provides a biaxially-oriented polypropylene (BOPP) tangle membrane which comprises a core layer, a first surface layer and a second surface layer, wherein the first surface layer is positioned between the core layer and the second surface layer. Material of the core layer comprises, by weight percentage, 10-30% of low molecular weight hydrogenated petroleum resin, 2-4% of antistatic agents, 10-18% of atactic propene polymer (PP), and the balance homopolymerized propene polymer (PP). Material of the first surface layer comprises, by weight percentage, 2-4% of slipping agents, and the balance homopolymerized PP. Material of the second surface layer comprises, by weight percentage, 3-5% of anti-sticking agents, and the balance homopolymerized PP. The degree of crystallinity of the BOPP tangle membrane is lowered, low molecular material having good intermiscibility with the PP is added to the BOPP tangle membrane, the microstructure of the BOPP tangle membrane is more densified, macromolecules are easy to tangled up to achieve preferably tangling force during tangling, and vertical and horizontal mechanical properties are nearly consistent. The BOPP tangle membrane has the advantages of being light in weight, excellent in combination property, capable of achieving high-speed large-scale production and the like. The invention further provides a preparation method of the BOPP tangle membrane.
Description
Technical field
The invention belongs to the packaging material field, be specifically related to a kind of BOPP torsion film and preparation method thereof.
Background technology
Along with whom the BOPP technology becomes increasingly, each manufacturing enterprise strives increasing unexpectedly, and each functional form BOPP film becomes the emphasis that each large enterprises falls over each other to research and develop.Owing to various special-shaped candies, cold drink food increase the attraction for obtaining unique profile, its many employings are twisted together packing and are not adopted traditional heat sealed package.What be used in the market the kink packing mostly is the PVC torsion film, PE simple tension torsion film, because its not environmental protection of PVC, and the factor such as PE simple tension torsion film is expensive, its application is subject to many limitations.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, the BOPP torsion film of a kind of environmental protection, light weight is provided; The present invention provides the preparation method of this BOPP torsion film simultaneously.
The present invention is achieved through the following technical solutions:
A kind of BOPP torsion film comprises sandwich layer, the first top layer and the second top layer, and the first top layer is between sandwich layer and the second top layer;
The material of described sandwich layer comprises that percentage by weight is the low molecular weight hydrogenated Petropols of 10-30%, the antistatic additive that percentage by weight is 2-4%, the random PP that percentage by weight is 10-18%, remains to be homopolymerization PP;
The material on described the first top layer is weight percentage and is the slip agent of 2-4%, remains to be homopolymerization PP;
The material on described the second top layer is weight percentage and is the antitack agent of 3-5%, remains to be homopolymerization PP.
A kind of preparation method of BOPP torsion film may further comprise the steps:
(1) batching: the required each component raw material in sandwich layer, the first top layer and the second top layer is prepared burden by ratio requirement respectively, and fully mixes separately;
(2) extrude slab: each raw material that will mix is being extruded fusion plastification in the face separately, processing temperature is 240-270 ℃, core layer temperature will hang down 10-30 ℃ than the temperature on the first top layer or the second top layer, to guarantee its plasticizing quality, plasticizing resin well is by the mixing of materials of T-shaped die head with sandwich layer and the first top layer and the second top layer, be attached at cold roller surface after evenly distributing, form the uniform sheet material of thickness;
(3) biaxial tension: sheet material is through preheat stretch, and the typing cooling is finished one by one vertical, horizontal and stretched, and by adjusting the control of stretch rate and forming temperature in length and breadth to shrinkage factor, obtains the film after the moulding;
(4) traction, thickness measuring and rolling: the film after the moulding is first behind the PRS cooling and shaping, carry out thickness measuring, carry out thickness by the APC system and automatically control, improve the surface printing performance through sided corona treatment again, last film obtains semi-finished product by the double-position winding machine rolling at steel core.
(5) Ageing Treatment with cut: half to become to leave in temperature be 20-35 ℃, and humidity is on the timeliness frame of 45-70% 3-7 days, cuts by cutting machine by the customer requirement width to obtain corresponding finished product and roll up.
Common BOPP film is because the high isotactic homopolymerization PP that adopt more, adopt first vertically after laterally one by one pulling method moulding, degree of crystallinity is higher like this, lateral stiffness is larger, rear its confining force of kink is better, anti-solution is larger to power, can't reach the kink packing instructions.The present invention has reduced the degree of crystallinity of BOPP film, adds the low molecular material good with the PP blending to it simultaneously, makes its microstructure more " densification ", and macromolecule is twisted together easily to reach better kink power during kink; Thereby approach by vertical, cross directional stretch multiplying power simultaneously and obtain isotropic mechanical property, reduce like this disorientation power, thereby invest the force retaining of twisting together preferably.BOPP torsion film of the present invention has light weight, and excellent combination property can realize again the characteristics such as high speed large-scale production, so this BOPP torsion film has market prospects and economic worth.
The specific embodiment
The present invention will be further described in detail below in conjunction with the specific embodiment.
Embodiment one:
A kind of BOPP torsion film comprises sandwich layer, the first top layer and the second top layer, and the first top layer is between sandwich layer and the second top layer;
The material of described sandwich layer comprises that percentage by weight is that 10% low molecular weight hydrogenated Petropols, percentage by weight are that 2% antistatic additive, percentage by weight are that 10% random PP(is atactic copolymerized polypropene), remain and be homopolymerization PP (being that percentage by weight is 78%); Wherein antistatic additive is preferably single intoxicated fat and alkylamine, can certainly adopt other antistatic additive.
Be weight percentage 2% slip agent of the material on described the first top layer remains and is homopolymerization PP (being that percentage by weight is 98%); Wherein slip agent is preferably glass microballoon+lucite, and using of slip agent can so that film dividing is the lithographic plate film, can certainly be adopted other slip agent.
Be weight percentage 3% antitack agent of the material on described the second top layer remains and is homopolymerization PP (being that percentage by weight is 97%).Wherein antitack agent is preferably synthetic silica, and the use of antitack agent can prevent film blocking, can certainly adopt other antitack agent.
The preparation method of above-mentioned BOPP torsion film may further comprise the steps:
(1) batching: the required each component raw material in sandwich layer, the first top layer and the second top layer is prepared burden by ratio requirement respectively, and fully mixes separately;
(2) extrude slab: each raw material that will mix is being extruded fusion plastification in the face separately, processing temperature is 240 ℃, core layer temperature will hang down 10 ℃ than the temperature on the first top layer or the second top layer, to guarantee its plasticizing quality, plasticizing resin well is by the mixing of materials of T-shaped die head with sandwich layer and the first top layer and the second top layer, be attached at cold roller surface after evenly distributing, form the uniform sheet material of thickness;
(3) biaxial tension: sheet material is through preheat stretch, and the typing cooling is finished one by one vertical, horizontal and stretched, and by adjusting the control of stretch rate and forming temperature in length and breadth to shrinkage factor, obtains the film after the moulding;
(4) traction, thickness measuring and rolling: the film after the moulding is first behind the PRS cooling and shaping, carry out thickness measuring, carry out thickness by the APC system and automatically control, improve the surface printing performance through sided corona treatment again, last film obtains semi-finished product by the double-position winding machine rolling at steel core.
(5) Ageing Treatment with cut: half to become to leave in temperature be 20 ℃, and humidity is 45% upper 3 day of timeliness frame, cuts by cutting machine by the customer requirement width to obtain corresponding finished product and roll up.
Embodiment two:
A kind of BOPP torsion film comprises sandwich layer, the first top layer and the second top layer, and the first top layer is between sandwich layer and the second top layer;
The material of described sandwich layer comprises that percentage by weight is that 10% low molecular weight hydrogenated Petropols, percentage by weight are that 4% antistatic additive, percentage by weight are 18% random PP, remains to be homopolymerization PP (being that percentage by weight is 68%);
Be weight percentage 4% slip agent of the material on described the first top layer remains and is homopolymerization PP (being that percentage by weight is 96%);
Be weight percentage 5% antitack agent of the material on described the second top layer remains and is homopolymerization PP (being that percentage by weight is 95%).
The preparation method of above-mentioned BOPP torsion film may further comprise the steps:
(1) batching: the required each component raw material in sandwich layer, the first top layer and the second top layer is prepared burden by ratio requirement respectively, and fully mixes separately;
(2) extrude slab: each raw material that will mix is being extruded fusion plastification in the face separately, processing temperature is 270 ℃, core layer temperature will hang down 30 ℃ than the temperature on the first top layer or the second top layer, to guarantee its plasticizing quality, plasticizing resin well is by the mixing of materials of T-shaped die head with sandwich layer and the first top layer and the second top layer, be attached at cold roller surface after evenly distributing, form the uniform sheet material of thickness;
(3) biaxial tension: sheet material is through preheat stretch, and the typing cooling is finished one by one vertical, horizontal and stretched, and by adjusting the control of stretch rate and forming temperature in length and breadth to shrinkage factor, obtains the film after the moulding;
(4) traction, thickness measuring and rolling: the film after the moulding is first behind the PRS cooling and shaping, carry out thickness measuring, carry out thickness by the APC system and automatically control, improve the surface printing performance through sided corona treatment again, last film obtains semi-finished product by the double-position winding machine rolling at steel core.
(5) Ageing Treatment with cut: half to become to leave in temperature be 35 ℃, and humidity is 70% upper 7 day of timeliness frame, cuts by cutting machine by the customer requirement width to obtain corresponding finished product and roll up.
Embodiment three:
A kind of BOPP torsion film comprises sandwich layer, the first top layer and the second top layer, and the first top layer is between sandwich layer and the second top layer;
The material of described sandwich layer comprises that percentage by weight is that 20% low molecular weight hydrogenated Petropols, percentage by weight are that 3% antistatic additive, percentage by weight are 16% random PP, remains to be homopolymerization PP (being that percentage by weight is 61%);
Be weight percentage 3% slip agent of the material on described the first top layer remains and is homopolymerization PP (being that percentage by weight is 97%);
Be weight percentage 4% antitack agent of the material on described the second top layer remains and is homopolymerization PP (being that percentage by weight is 96%);
The preparation method of above-mentioned BOPP torsion film may further comprise the steps:
(1) batching: the required each component raw material in sandwich layer, the first top layer and the second top layer is prepared burden by ratio requirement respectively, and fully mixes separately;
(2) extrude slab: each raw material that will mix is being extruded fusion plastification in the face separately, processing temperature is 250 ℃, core layer temperature will hang down 20 ℃ than the temperature on the first top layer or the second top layer, to guarantee its plasticizing quality, plasticizing resin well is by the mixing of materials of T-shaped die head with sandwich layer and the first top layer and the second top layer, be attached at cold roller surface after evenly distributing, form the uniform sheet material of thickness;
(3) biaxial tension: sheet material is through preheat stretch, and the typing cooling is finished one by one vertical, horizontal and stretched, and by adjusting the control of stretch rate and forming temperature in length and breadth to shrinkage factor, obtains the film after the moulding;
(4) traction, thickness measuring and rolling: the film after the moulding is first behind the PRS cooling and shaping, carry out thickness measuring, carry out thickness by the APC system and automatically control, improve the surface printing performance through sided corona treatment again, last film obtains semi-finished product by the double-position winding machine rolling at steel core.
(5) Ageing Treatment with cut: half to become to leave in temperature be 25 ℃, and humidity is 60% upper 5 day of timeliness frame, cuts by cutting machine by the customer requirement width to obtain corresponding finished product and roll up.
Claims (2)
1. a BOPP torsion film is characterized in that, comprises sandwich layer, the first top layer and the second top layer, and the first top layer is between sandwich layer and the second top layer;
The material of described sandwich layer comprises that percentage by weight is the low molecular weight hydrogenated Petropols of 10-30%, the antistatic additive that percentage by weight is 2-4%, the random PP that percentage by weight is 10-18%, remains to be homopolymerization PP;
The material on described the first top layer is weight percentage and is the slip agent of 2-4%, remains to be homopolymerization PP;
The material on described the second top layer is weight percentage and is the antitack agent of 3-5%, remains to be homopolymerization PP.
2. the preparation method of a BOPP torsion film according to claim 1 is characterized in that, may further comprise the steps:
(1) batching: the required each component raw material in sandwich layer, the first top layer and the second top layer is prepared burden by ratio requirement respectively, and fully mixes separately;
(2) extrude slab: each raw material that will mix is being extruded fusion plastification in the face separately, processing temperature is 240-270 ℃, core layer temperature will hang down 10-30 ℃ than the temperature on the first top layer or the second top layer, to guarantee its plasticizing quality, plasticizing resin well is by the mixing of materials of T-shaped die head with sandwich layer and the first top layer and the second top layer, be attached at cold roller surface after evenly distributing, form the uniform sheet material of thickness;
(3) biaxial tension: sheet material is through preheat stretch, and the typing cooling is finished one by one vertical, horizontal and stretched, and by adjusting the control of stretch rate and forming temperature in length and breadth to shrinkage factor, obtains the film after the moulding;
(4) traction, thickness measuring and rolling: the film after the moulding is first behind the PRS cooling and shaping, carry out thickness measuring, carry out thickness by the APC system and automatically control, improve the surface printing performance through sided corona treatment again, last film obtains semi-finished product by the double-position winding machine rolling at steel core.
(5) Ageing Treatment with cut: half to become to leave in temperature be 20-35 ℃, and humidity is on the timeliness frame of 45-70% 3-7 days, cuts by cutting machine by the customer requirement width to obtain corresponding finished product and roll up.
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Cited By (5)
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| 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 |
| CN104672607A (en) * | 2014-12-30 | 2015-06-03 | 苏州度辰新材料有限公司 | Biaxially oriented polypropylene high-modulus film master batch and production process thereof |
| CN105881923A (en) * | 2016-05-04 | 2016-08-24 | 温州莎特塑胶科技有限公司 | PET (Polyethylene Terephthalate) sheet production technology |
| CN107554026A (en) * | 2017-10-13 | 2018-01-09 | 安徽省太湖泽泓塑业有限公司 | Colored Biaxially oriented polypropylene packaging bag and preparation method thereof |
| CN107901555A (en) * | 2017-11-22 | 2018-04-13 | 贵州金田新材料科技有限公司 | A kind of BOPP high temperature resistants protective film and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107554026A (en) * | 2017-10-13 | 2018-01-09 | 安徽省太湖泽泓塑业有限公司 | Colored Biaxially oriented polypropylene packaging bag and preparation method thereof |
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Application publication date: 20130213 |