CN102248728A - Uvioresistant BOPP (Biaxially Oriented Polypropylene) film and preparation process thereof - Google Patents
Uvioresistant BOPP (Biaxially Oriented Polypropylene) film and preparation process thereof Download PDFInfo
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- CN102248728A CN102248728A CN2011101446726A CN201110144672A CN102248728A CN 102248728 A CN102248728 A CN 102248728A CN 2011101446726 A CN2011101446726 A CN 2011101446726A CN 201110144672 A CN201110144672 A CN 201110144672A CN 102248728 A CN102248728 A CN 102248728A
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Abstract
The invention discloses an uvioresistant BOPP (Biaxially Oriented Polypropylene) film and a preparation process thereof. The uvioresistant BOPP film consists of a middle layer, an inner surface layer and an outer surface layer, the middle layer is an ultraviolet absorbing layer, the inner surface layer is a heat-sealing layer and the outer surface layer is a common printing layer, wherein the ultraviolet absorbing layer comprises the following components in percentage by weight: 1-3% of ultraviolet absorption master batch, 2-3% of antistatic agent and 94-97% of homopolymer polypropylene; the common printing layer comprises the following components in percentage by weight: 3% of antiblocking agent and 97% of homopolymer polypropylene; and the heat-sealing layer comprises the following components in percentage by weight: 3% of antiblocking agent, 97% of binary homopolymer polypropylene or ternary homopolymer polypropylene. The uvioresistant BOPP film disclosed by the invention has the advantages of uvioresistant performance, high transparency, simple processing technique and the like.
Description
Technical field
The present invention relates to plastic film for wrapping and manufacture craft thereof, more particularly relate to a kind of have as packing appliance isolate ultraviolet bidirectional stretching polypropylene film.
Background technology
Bidirectional stretching polypropylene film of the prior art is a kind of common packing film; it can not produce iris action to ultraviolet ray; can be aging gradually under ultraviolet ray irradiation, also can not the protective film goods in article printed article etc. avoid ultraviolet ray and destroy, can't be in outdoor long-term use.
The uvioresistant film is generally by being coated with the uvioresistant coating or using silane-group containing crosslinking copolymerization manufacture of polyolefins uvioresistant film in the prior art on the film top layer, this technology is comparatively complicated, the cost height, and film clarity is not high, has limited it in the application that needs high grade of transparency field.
Summary of the invention
For avoiding above-mentioned existing in prior technology weak point, the object of the present invention is to provide a kind of bidirectional stretching polypropylene film with anti-ultraviolet function, it can prevent that inner package from degrading, fading because of ultraviolet irradiation.
The present invention is for realizing that its purpose adopts following technical scheme: a kind of uvioresistant bidirectional stretching polypropylene film, constitute by intermediate layer, endosexine and extexine, described intermediate layer is a UV-absorbing layer, and described endosexine is a hot sealing layer, and described extexine is common printed layer; The components based on weight percentage of described UV-absorbing layer is 1% ~ 3% UV absorption masterbatch, 2% ~ 3% antistatic master batch and 94% ~ 97% HOPP; The components based on weight percentage of described common printed layer is 3% anti-stick masterbatch and 97% HOPP of connecting, and the components based on weight percentage of described hot sealing layer is 3% anti-stick masterbatch and 97% binary copolymerization polypropylene or the ternary polymerized polypropylene of connecting.
Described UV absorption masterbatch is 2-(2 '-hydroxyl-3 ', 5 '-two uncle's phenyl)-5-chlorination BTA and the mixing thing of COPP, the ratio of the two weight is 3.5-4.0 ︰ 6.5-6.0.
Described UV absorption masterbatch contains ultra-violet stabilizer, and described ultra-violet stabilizer is hindered amine as light stabilizer (HALS), and its 4-5% by the UV absorption master batch weight adds.
The thickness of described UV-absorbing layer is 18～22 μ m, and the thickness of described hot sealing layer is 1～3 μ m, and described common printed layer thickness is 0.8～1.5 μ m.
Another object of the present invention provides the manufacturing process of this film, and it adopts following step as follows:
A, the stacked raw material HOPP of ultraviolet radiation absorption, antistatic master batch and ultraviolet radiation absorption masterbatch are delivered to and are heated into molten condition in the main extruder after super-dry and components by weight percentage; Hot sealing layer raw material binary copolymerization polypropylene and the anti-stick masterbatch and common printed layer material copolymerization polypropylene and additive of connecting are through after the components by weight percentage, fusion in two auxiliary extruders respectively, above-mentioned melt is respectively through filtering, converge coextrusion in three layers of die head, die head temperature is 240 ℃;
B, the melt extruded from die head attach on 20～30 ℃ of sharp cooling rolls by air knife that Quench forms the casting sheet 20～30 ℃ of water-baths;
C, casting sheet enter longitudinal stretching after dewatering through compressed air, and the casting sheet is through 120 ℃～129 ℃ preheatings, and at 109 ℃～125 ℃ following longitudinal stretchings, stretching ratio is 4.0～5.2;
D, draw rear film to carry out cross directional stretch again, before cross directional stretch, carry out preheating, under 150～160 ℃, stretch with 174 ℃～180 ℃ vertical, 150 ℃～155 ℃ thermal finalizations, stretching ratio is 6.0～7.0;
E, film enter trailer system flattening carrying out thickness measuring feedback, sided corona treatment and rolling through supercooling;
After f, the process Ageing Treatment, cut, pack and make finished product.
Beneficial effect of the present invention: film possesses the isolation action of ultraviolet radiation, reduces the damage of ultraviolet ray to inner package greatly, prevents that inner package from degrading, fading because of ultraviolet irradiation.Technology of the present invention is comparatively simple, and cost is low, and the film clarity height.
Description of drawings
Below in conjunction with drawings and Examples the present invention is described in further detail, does not therefore limit the present invention in the described scope of embodiments.
Fig. 1 isolates the three-layer structure schematic diagram of ultraviolet film for the present invention.
Among the figure 1, be common printed layer, 2, be UV-absorbing layer, 3, be hot sealing layer.
Specific implementation method
Hot sealing layer and common printed layer add additive by existing prescription, the components based on weight percentage that is common printed layer is 3% anti-stick masterbatch and 97% HOPP of connecting, and the components based on weight percentage of described hot sealing layer is 3% anti-stick masterbatch and 97% binary copolymerization polypropylene or the ternary polymerized polypropylene of connecting.
The prescription of UV-absorbing layer is 1% UV absorption masterbatch by weight percentage, 2% antistatic master batch, 97% HOPP.
The UV absorption masterbatch is 2-(2 '-hydroxyl-3 ', 5 '-two uncle's phenyl)-5-chlorination BTA and the polyacrylic mixing thing of copolymerization, the two weight ratio is 3.5-4.0 ︰ 6.5-6.0.
Produce by following production technology:
A, the stacked raw material HOPP of ultraviolet radiation absorption, antistatic master batch, ultraviolet radiation absorption masterbatch deliver to through super-dry and proportioning and are heated into molten condition in the main extruder; Hot sealing layer raw material 97% binary copolymerization polypropylene and the 3% anti-stick masterbatch and common printed layer raw material 97% COPP and the 3% anti-stick masterbatch that connects of connecting are through proportioning fusion in two auxiliary extruders respectively, above-mentioned melt is respectively through filtering, converge coextrusion in three layers of die head, die head temperature is 240 ℃;
B, the melt extruded from die head attach on 20～30 ℃ of sharp cooling rolls by air knife that Quench forms the casting sheet 20～30 ℃ of water-baths;
C, casting sheet enter longitudinal stretching after dewatering through compressed air, and the casting sheet is through 120 ℃～129 ℃ preheatings, and at 109 ℃～125 ℃ following longitudinal stretchings, stretching ratio is 4.0～5.2;
D, draw rear film to carry out cross directional stretch, before cross directional stretch, carry out preheating, under 150～160 ℃, stretch with 174 ℃～180 ℃ vertical, 150 ℃～155 ℃ thermal finalizations, stretching ratio is 6.0～7.0;
E, film enter trailer system flattening carrying out thickness measuring feedback, sided corona treatment and rolling through supercooling; After propylene Sf, the process Ageing Treatment, cut, pack and make finished product.
Hot sealing layer and common printed layer add additive by existing prescription, and the prescription of UV-absorbing layer is 2% UV absorption masterbatch, 3% antistatic master batch, 95% HOPP.
The UV absorption masterbatch is 2-(2 '-hydroxyl-3 ', 5 '-two uncle's phenyl)-5-chlorination BTA and the polyacrylic mixing thing of copolymerization, the two weight ratio is 3.5 ︰ 6.0; Add ultra-violet stabilizer, i.e. hindered amine as light stabilizer by 4% of UV absorption master batch weight.
Produce by following production technology:
A, the stacked raw material HOPP of ultraviolet radiation absorption, antistatic master batch, ultraviolet radiation absorption masterbatch deliver to through super-dry and proportioning and are heated into molten condition in the main extruder; Hot sealing layer raw material binary copolymerization polypropylene and the anti-stick masterbatch and common printed layer material copolymerization polypropylene and additive of connecting are through proportioning fusion in two auxiliary extruders respectively, above-mentioned melt is respectively through filtering, converge coextrusion in three layers of die head, die head temperature is 240 ℃;
B, the melt extruded from die head attach on 20～30 ℃ of sharp cooling rolls by air knife that Quench forms the casting sheet 20～30 ℃ of water-baths;
C, casting sheet enter longitudinal stretching after dewatering through compressed air, and the casting sheet is through 120 ℃～129 ℃ preheatings, and at 109 ℃～125 ℃ following longitudinal stretchings, stretching ratio is 4.0～5.2;
D, draw rear film to carry out cross directional stretch, before cross directional stretch, carry out preheating, under 150～160 ℃, stretch with 174 ℃～180 ℃ vertical, 150 ℃～155 ℃ thermal finalizations, stretching ratio is 6.0～7.0;
E, film enter trailer system flattening carrying out thickness measuring feedback, sided corona treatment and rolling through supercooling;
After propylene Sf, the process Ageing Treatment, cut, pack and make finished product.
Hot sealing layer and common printed layer add additive by existing prescription, and the prescription of UV-absorbing layer is 3% UV absorption masterbatch, 2% antistatic master batch, 95% HOPP.The UV absorption masterbatch is 2-(2 '-hydroxyl-3 ', 5 '-two uncle's phenyl)-5-chlorination BTA and the polyacrylic mixing thing of copolymerization, the two weight ratio is 4.0 ︰ 6.5; Add ultra-violet stabilizer, i.e. hindered amine as light stabilizer by 5% of UV absorption master batch weight.
Produce by following production technology:
A, the stacked raw material HOPP of ultraviolet radiation absorption, antistatic master batch, ultraviolet radiation absorption masterbatch deliver to through super-dry and proportioning and are heated into molten condition in the main extruder; Hot sealing layer raw material binary copolymerization polypropylene and the anti-stick masterbatch and common printed layer material copolymerization polypropylene and additive of connecting are through proportioning fusion in two auxiliary extruders respectively, above-mentioned melt is respectively through filtering, converge in three layers of die head and extrude, die head temperature is 240 ℃;
B, the melt extruded from die head attach on 20～30 ℃ of sharp cooling rolls by air knife that Quench forms the casting sheet 20～30 ℃ of water-baths;
C, casting sheet enter longitudinal stretching after dewatering through compressed air, and the casting sheet is through 120 ℃～129 ℃ preheatings, and at 109 ℃～125 ℃ following longitudinal stretchings, stretching ratio is 4.0～5.2;
D, draw rear film to carry out cross directional stretch, before cross directional stretch, carry out preheating, under 150～160 ℃, stretch with 174 ℃～180 ℃ vertical, 150 ℃～155 ℃ thermal finalizations, stretching ratio is 6.0～7.0;
E, film enter trailer system flattening carrying out thickness measuring feedback, sided corona treatment and rolling through supercooling;
After propylene Sf, the process Ageing Treatment, cut, pack and make finished product.
Claims (5)
1. a uvioresistant bidirectional stretching polypropylene film is made of intermediate layer, endosexine and extexine, it is characterized in that: described intermediate layer is a UV-absorbing layer, and described endosexine is a hot sealing layer, and described extexine is common printed layer; The components based on weight percentage of described UV-absorbing layer is 1% ~ 3% UV absorption masterbatch, 2%-3% antistatic master batch and 94% ~ 96% HOPP; The components based on weight percentage of described common printed layer is 3% anti-stick masterbatch and 97% HOPP of connecting, and the components based on weight percentage of described hot sealing layer is 3% anti-stick masterbatch and 97% binary copolymerization polypropylene or the ternary polymerized polypropylene of connecting.
2. uvioresistant bidirectional stretching polypropylene film according to claim 1, it is characterized in that: described UV absorption masterbatch is 2-(2 '-hydroxyl-3 ', 5 '-two uncle's phenyl)-and 5-chlorination BTA and the polyacrylic mixing thing of copolymerization, the ratio of the two weight is 3.5-4.0 ︰ 6.5-6.0.
3. uvioresistant bidirectional stretching polypropylene film according to claim 2 is characterized in that: described UV absorption masterbatch contains ultra-violet stabilizer, and described ultra-violet stabilizer is a hindered amine as light stabilizer, and its 4-5% by the UV absorption master batch weight adds.
4. uvioresistant bidirectional stretching polypropylene film according to claim 1 is characterized in that: the thickness in described intermediate layer is 18～22 μ m; The thickness of described internal layer is 1～3 μ m, and described outer layer thickness is 0.8～1.5 μ m.
5. the manufacture craft of uvioresistant bidirectional stretching polypropylene film according to claim 1 is characterized in that adopting following step as follows:
A, the stacked raw material HOPP of ultraviolet radiation absorption, antistatic master batch and ultraviolet radiation absorption masterbatch are delivered to and are heated into molten condition in the main extruder after super-dry and components by weight percentage; Hot sealing layer raw material binary copolymerization polypropylene and the anti-stick masterbatch and common printed layer material copolymerization polypropylene and additive of connecting are through after the components by weight percentage, fusion in two auxiliary extruders respectively, above-mentioned melt is respectively through filtering, converge coextrusion in three layers of die head, die head temperature is 240 ℃;
B, the melt of extruding from die head attach on 20～30 ℃ of sharp cooling rolls by air knife, and Quench forms the casting sheet in 20～30 ℃ of water-baths;
C, casting sheet enter longitudinal stretching after dewatering through compressed air, and the casting sheet is through 120 ℃～129 ℃ preheatings, and at 109 ℃～125 ℃ following longitudinal stretchings, stretching ratio is 4.0～5.2;
D, draw rear film to carry out cross directional stretch again, before cross directional stretch, carry out preheating with 174 ℃～180 ℃, under 150～160 ℃, stretch vertical, 150 ℃～155 ℃ thermal finalizations, stretching ratio is 6.0～7.0;
E, film enter trailer system flattening carrying out thickness measuring feedback, sided corona treatment and rolling through supercooling;
After f, the process Ageing Treatment, cut, pack and make finished product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101446726A CN102248728A (en) | 2011-06-01 | 2011-06-01 | Uvioresistant BOPP (Biaxially Oriented Polypropylene) film and preparation process thereof |
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| CN2011101446726A CN102248728A (en) | 2011-06-01 | 2011-06-01 | Uvioresistant BOPP (Biaxially Oriented Polypropylene) film and preparation process thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105235336A (en) * | 2015-09-06 | 2016-01-13 | 安徽国风塑业股份有限公司 | Low-temperature-resistant bidirectionally-stretched polypropylene thin film and preparation method of same |
| CN105500869A (en) * | 2016-01-12 | 2016-04-20 | 东莞市华宇包装有限公司 | Anti-static film and preparation technology thereof |
| CN107215054A (en) * | 2017-05-17 | 2017-09-29 | 纳琳威纳米科技（上海）有限公司 | A kind of method that three-layer co-extruded stretching prepares the wear-resisting and high ultraviolet-resistant optical thin film of hardening |
| CN109080103A (en) * | 2018-08-01 | 2018-12-25 | 宁波瑞成包装材料有限公司 | The anti-stripping film of the heatproof that metallizes and its production method |
| CN112721373A (en) * | 2020-12-28 | 2021-04-30 | 安徽省长荣新材料科技有限公司 | Anti-ultraviolet polypropylene film and manufacturing process thereof |
| CN112721374A (en) * | 2020-12-28 | 2021-04-30 | 安徽省长荣新材料科技有限公司 | Low-temperature-resistant polypropylene film for protecting photovoltaic backboard substrate and manufacturing process thereof |
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| CN201304750Y (en) * | 2008-11-28 | 2009-09-09 | 安徽国风塑业股份有限公司 | Heat-sealing BOPP film capable of direct shallow lattice printing |
| CN101633261A (en) * | 2008-07-21 | 2010-01-27 | 泉州利昌塑胶有限公司 | Biaxially-oriented polyethylene synthetic paper |
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| CN102049861A (en) * | 2010-12-14 | 2011-05-11 | 安徽国风塑业股份有限公司 | Preparation method of BOPP film with high thermal shrinkage rate |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105235336A (en) * | 2015-09-06 | 2016-01-13 | 安徽国风塑业股份有限公司 | Low-temperature-resistant bidirectionally-stretched polypropylene thin film and preparation method of same |
| CN105500869A (en) * | 2016-01-12 | 2016-04-20 | 东莞市华宇包装有限公司 | Anti-static film and preparation technology thereof |
| CN107215054A (en) * | 2017-05-17 | 2017-09-29 | 纳琳威纳米科技（上海）有限公司 | A kind of method that three-layer co-extruded stretching prepares the wear-resisting and high ultraviolet-resistant optical thin film of hardening |
| CN109080103A (en) * | 2018-08-01 | 2018-12-25 | 宁波瑞成包装材料有限公司 | The anti-stripping film of the heatproof that metallizes and its production method |
| CN112721373A (en) * | 2020-12-28 | 2021-04-30 | 安徽省长荣新材料科技有限公司 | Anti-ultraviolet polypropylene film and manufacturing process thereof |
| CN112721374A (en) * | 2020-12-28 | 2021-04-30 | 安徽省长荣新材料科技有限公司 | Low-temperature-resistant polypropylene film for protecting photovoltaic backboard substrate and manufacturing process thereof |
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