CN101928408B - Composite anti-blocking agent for linear low-density polyethylene film and using method thereof - Google Patents
Composite anti-blocking agent for linear low-density polyethylene film and using method thereof Download PDFInfo
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- CN101928408B CN101928408B CN2009101486317A CN200910148631A CN101928408B CN 101928408 B CN101928408 B CN 101928408B CN 2009101486317 A CN2009101486317 A CN 2009101486317A CN 200910148631 A CN200910148631 A CN 200910148631A CN 101928408 B CN101928408 B CN 101928408B
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- sodium benzoate
- density polyethylene
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Abstract
The invention discloses a composite anti-blocking agent for a linear low-density polyethylene film. The composite anti-blocking agent comprises silicon dioxide and sodium benzoate. A method for using the composite anti-blocking agent comprises the following steps of: dissolving the sodium benzoate in deionized water; uniformly stirring silicasol and solution of sodium benzoate; then spray-drying the mixed solution; adding the anti-blocking agent and an antioxidant into linear low-density polyethylene; and performing extrusion and granulation on the mixture and adding into a film blowing machine to blow the film. Due to the adoption of the anti-blocking agent, the anti-blocking performance of a film blowing product is obviously improved, the longitudinal and transverse tensile strength is improved to a certain extent, and the comprehensive performance is high.
Description
[technical field]
The present invention relates to the linear low-density polyethylene film field, particularly a kind of opening agent that is used to solve film blocking.
[background technology]
Linear low density polyethylene (LLDPE) film is the aspect such as packing and agriculture prodn of applicable industry article and daily necessities widely; But film can be sticked together because of pressurized in production and storage process; Promptly produce " adhesion " phenomenon, in people's daily life, reach the use in the industriallization automatic packaging production line thereby influence it.
It mainly is because smooth surface makes between the film forms due to the vacuum that the LLDPE film sticks together.The method that solves film blocking is to add the opening agent, and the opening agent can form many fine and hard projections on the surface of film, makes extraneous air be easy to enter between the double-layer films, avoids forming vacuum between the two-layer film that fits together.Reduced the contact area between the film, will reduce the film surface frictional coefficient simultaneously, made film be easy to opening, thereby play the effect that prevents film blocking.The opening agent refers generally to silica-based inorganic powder, like synthetic silica, zeyssatite etc., inorganic powders such as adopting lime carbonate, talcum powder is also arranged as the agent of polyolefin film opening.
USP 6,066, the mixture of 691 employing silicon-dioxide or silicon-dioxide and silicate is as the opening agent; Obtain the film of opening excellent property; When silica gel content was 2000ppm, the stiction force of film surface can be reduced to 0.3N from 0.8N, and because the silica nanometer aperture of adopting is littler; Absorption to lubricant reduces, thereby reduces the consumption of lubricant.
USP 6,465 then is the method for selecting multi-layer compound film in 266, introduces one deck ethylene-propylene copolymer at least on the surface, thereby without additive opening agent, just can reach the purpose that film is easy to opening, reduction skin friction coefficient.
In composite assistant, add 0.05～0.2% lightweight synthetic silica in the Chinese patent 200610097861.1 as the opening agent; The end of LLDPE molecular chain is sucked by the space of silica dioxide granule in the course of processing; This particle becomes nucleation centre simultaneously makes its crystallization, has so just significantly reduced the molecular chain that exposes, the winding of molecular chain when having reduced the double-layer films contact; Thereby the solution adhesion problems, the LLDPE of gained has opening performance preferably.
Gonda van Essche [Gonda van Essche; Thomas Kromminga; AndreasSchmidt.JOURNAL OF PLASTIC FILM & SHEETING, VOL.16-APRIL2000,155-168] a kind of silicon-dioxide with large pore volume of synthetic can effectively improve its tissue adhesion effect in polyolefin film; Even under the low like this content of 1000-1500ppm, can the stiction force of film be reduced to 0.4N, can improve the material scratch resistance simultaneously.
[summary of the invention]
The purpose of this invention is to provide a kind of new composite anti-blocking agent that is applied to the LLDPE film and method of use thereof.
The object of the invention realizes through following technical scheme.
Opening agent according to the invention comprises following component: silicon-dioxide, Sodium Benzoate, wherein the mass ratio of silicon-dioxide and Sodium Benzoate was generally 25: 75 to 90: 10, preferred 50: 50 to 80: 20.
The preparation method of opening agent of the present invention is: at first Sodium Benzoate is dissolved in the deionized water, and silicon sol and Sodium Benzoate solution stirring is even, again the solution that mixes is carried out spraying drying, obtain the mixture of silicon-dioxide and Sodium Benzoate.
The present invention also provides a kind of method of use of said opening agent; Comprise the steps: to add said opening agent and oxidation inhibitor in the linear low density polyethylene together; Through adding blown film in the inflation film manufacturing machine, the consumption 0.1-1phr of its split shed agent (every hectogram umber, i.e. the linear low density polyethylene matrix of each hundred umber behind the extruding pelletization; The consumption of opening agent is 0.1-1 part), preferred 0.2-0.5phr; The present invention does not have particular requirement to oxidation inhibitor and the processing aid that is adopted, and is the general oxidation inhibitor and the processing aid of polyolefin resin processing, and its addition is difference with the difference of end article purposes, generally is 0.01～1phr of polyvinyl resin matrix.For example, oxidation inhibitor can be following one or more mixture: four [β-(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester (being antioxidant 1010); (2, the 4-di-tert-butyl-phenyl) tris phosphite (being oxidation inhibitor 168); Processing aid is like Zinic stearas.
Composite anti-blocking agent of the present invention is applied in the LLDPE blown film goods, and the film opening excellent property, the frictional coefficient that obtain are low, and film stretching intensity obviously improves, and over-all properties is good.
[embodiment]
The raw material that adopts in the embodiment is the linear low density polyethylene powder.
Spraying drying is equipped for spray drying experiment device (QP-3X model, Beijing northization are ground petrochemical industry designing institute and produced), 140～170 ℃ of processing inlet TRs, 40～70 ℃ of temperature outs.
The equipment of extruding pelletization can be twin screw extruder, single screw extrusion machine.
165～220 ℃ of the TRs of blown film equipment processing.
Testing standard
Film blocking property TP GB/T 16276-1996
Film friction coefficient is measured GB/T 10006-88
Film resistance to tearing TP Ai Laimenduofufa GB 11999-89
Film stretching TP GB/T 1040.3-2006
The free dart method of film shock resistance TP GB 9639-1988A method
Embodiment 1 8404
50 gram Sodium Benzoates (Wuhan flourishing age Fine Chemical Works) are dissolved in the 150 gram deionized waters, add 200 gram silicon sol (ZA-25, SiO again
2Concentration 25%; The chemical plant, Qingdao, pH value about 7), with laboratory high-shearing dispersion emulsifying machine (FA25; FLUKO produces) stirred 30 minutes with 10000 rpms; In spray drying experiment device (QP-3X model, Beijing northization are ground petrochemical industry designing institute and produced), spray, obtain the mixture of Sodium Benzoate and silicon-dioxide.With 12.5 gram said mixtures and antioxidant 1010 (0.5 gram), 168 (2 grams), Zinic stearas (2.5 gram) join 2500 gram linear low density polyethylene powder (melting index 1-1.2g/10min, density 0.917-0.919g/cm simultaneously
3) in, height is mixed and is closed even back with twin screw (model C TE35, the mechanical ltd of times Long Keya of section (Nanjing)) granulation; Temperature 160-195 ℃; Add blown film in the inflation film manufacturing machine (Lvshun, Dalian forcing machine factory) again, temperature 165-200 ℃, film thickness 28-32 micron; 27 centimetres of flat widths, 17 centimetres of frost line height.The dependence test result of sample sees table 1.
Comparative example 1:8400
Except that the mixture that does not use Sodium Benzoate and silicon-dioxide, all the other are identical with embodiment 1.The dependence test result who makes sample sees table 1.
Embodiment 2:8403
The mixture of Sodium Benzoate that uses among the embodiment 1 and silicon-dioxide is got 5 grams, and all the other are identical with embodiment 1.The dependence test result who makes sample sees table 1.
Embodiment 3:8402
20 gram Sodium Benzoates (Wuhan flourishing age Fine Chemical Works) are dissolved in the 60 gram deionized waters, add 320 gram silicon sol (ZA-25, SiO again
2Concentration 25%; The chemical plant, Qingdao, pH value about 7), with laboratory high-shearing dispersion emulsifying machine (FA25; FLUKO produces) stirred 30 minutes with 10000 rpms; In spray drying experiment device (QP-3X model, Beijing northization are ground petrochemical industry designing institute and produced), spray, obtain the mixture of Sodium Benzoate and silicon-dioxide.With 12.5 gram said mixtures and antioxidant 1010 (0.5 gram), 168 (2 grams), Zinic stearas (2.5 gram) join 2500 gram linear low density polyethylene powder (melting index 1-1.2g/10min, density 0.917-0.919g/cm simultaneously
3) in, height is mixed and is closed even back with twin screw (model C TE35, the mechanical ltd of times Long Keya of section (Nanjing)) granulation; Temperature 160-195 ℃; Add blown film in the inflation film manufacturing machine (Lvshun, Dalian forcing machine factory) again, temperature 165-200 ℃, film thickness 28-32 micron; 27 centimetres of flat widths, 17 centimetres of frost line height.The dependence test result of sample sees table 1.
Embodiment 4:8401
The mixture of Sodium Benzoate that uses among the embodiment 3 and silicon-dioxide is got 5 grams, and all the other are identical with embodiment 3.The dependence test result who makes sample sees table 1.
Comparative example 2:8405
With 100 gram silicon sol (ZA-25, SiO
2Concentration 25%, chemical plant, Qingdao, pH value about 7), spraying in spray drying experiment device (QP-3X model, Beijing northization are ground petrochemical industry designing institute and produced) obtains silicon-dioxide.With 12.5 above-mentioned silicon-dioxide of gram and antioxidant 1010 (0.5 gram), 168 (2 grams), Zinic stearas (2.5 gram) join 2500 gram linear low density polyethylene powder (melting index 1-1.2g/10min, density 0.917-0.919g/cm simultaneously
3) in, height is mixed and is closed even back with twin screw (model C TE35, the mechanical ltd of times Long Keya of section (Nanjing)) granulation; Temperature 160-195 ℃; Add blown film in the inflation film manufacturing machine (Lvshun, Dalian forcing machine factory) again, temperature 165-200 ℃, film thickness 28-32 micron; 27 centimetres of flat widths, 17 centimetres of frost line height.The dependence test result of sample sees table 1.
Comparative example 3:8406
The silicon-dioxide that uses in the comparative example 2 is got 5 grams, and all the other are identical with comparative example 2.The dependence test result who makes sample sees table 1.
The mixture that in LLDPE, adds silicon-dioxide and Sodium Benzoate; Sodium Benzoate content is 20～50%, and the stiction force of LLDPE film all has obvious decline, does not more add the comparative example 1 of opening agent like embodiment 1; Stiction force is reduced to 0.06 newton from 0.82 newton, and the opening performance obviously improves.The tensile strength of the vertical and horizontal of film all has raising after having added the opening agent; For example compare the comparative example 1 that does not add the opening agent among the embodiment 4; Longitudinal tensile strength has been brought up to 29MPa from 20.9MPa; Transverse tensile strength is brought up to 24.4MPa from 22.9MPa, and dart impact strength also increases.And do not add Sodium Benzoate, directly use SiO
2As the comparative example 3 of opening agent, tensile strength has small size raising, but not as the effect of the mixture that adds silicon-dioxide and Sodium Benzoate obvious.
The mixture that spraying drying makes after adopting Sodium Benzoate to mix with silicon-dioxide adds the blown film product that makes among the LLDPE; The opening performance obviously improves; And the tensile strength at vertical and horizontal all improves to some extent, and obtains the LLDPE film article of high comprehensive performance.
Table 1.LLDPE prescription
*And the film of preparation
*Each item performance
*During above LLDPE film granulation, oxidation inhibitor is 0.02phr1010,0.08phr168,0.1phr Zinic stearas.
*30 microns of film thickness average out to.
Claims (4)
1. composite anti-blocking agent that is used for linear low-density polyethylene film comprises following component: silicon-dioxide, Sodium Benzoate, and wherein the mass ratio of silicon-dioxide and Sodium Benzoate is 25: 75 to 90: 10,
And adopt following method preparation: at first Sodium Benzoate is dissolved in the deionized water, silicon sol and Sodium Benzoate solution stirring is even, again the solution that mixes is carried out spraying drying, obtain the mixture of silicon-dioxide and Sodium Benzoate.
2. opening agent according to claim 1, wherein the mass ratio of silicon-dioxide and Sodium Benzoate is 50: 50 to 80: 20.
3. claim 1 or 2 described opening agent are in the method for use of preparation in the linear low-density polyethylene film; Comprise the steps: to add said opening agent and oxidation inhibitor in the linear low density polyethylene together; Through adding blown film in the inflation film manufacturing machine behind the extruding pelletization; With respect to the linear low density polyethylene matrix of each hundred umber, the consumption of opening agent is 0.1-1 part.
4. method of use according to claim 3, with respect to the linear low density polyethylene matrix of each hundred umber, the consumption of opening agent is 0.2-0.5 part.
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| CN2009101486317A CN101928408B (en) | 2009-06-25 | 2009-06-25 | Composite anti-blocking agent for linear low-density polyethylene film and using method thereof |
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| CN2009101486317A CN101928408B (en) | 2009-06-25 | 2009-06-25 | Composite anti-blocking agent for linear low-density polyethylene film and using method thereof |
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| CN101928408B true CN101928408B (en) | 2012-01-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108219204A (en) * | 2017-12-18 | 2018-06-29 | 孙祎 | A kind of polyethylene film dedicated openings agent |
| CN110092946B (en) * | 2019-05-22 | 2022-02-08 | 湖南工学院 | Non-migration type anti-aging agent and preparation method and application thereof |
Citations (2)
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| CN101255249A (en) * | 2008-02-19 | 2008-09-03 | 中国石化扬子石油化工有限公司 | Polyethylene repackaging film material composition |
| CN101316579A (en) * | 2005-09-09 | 2008-12-03 | 莫诺索尔克斯有限公司 | Uniform films for rapid-dissolve dosage form incorporating anti-tacking compositions |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101316579A (en) * | 2005-09-09 | 2008-12-03 | 莫诺索尔克斯有限公司 | Uniform films for rapid-dissolve dosage form incorporating anti-tacking compositions |
| CN101255249A (en) * | 2008-02-19 | 2008-09-03 | 中国石化扬子石油化工有限公司 | Polyethylene repackaging film material composition |
Non-Patent Citations (4)
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| 侯雅丽等.聚乙烯含开口剂母粒的研制与应用.《塑料科技》.2002,(第3期),第29页左栏倒数第2段～右栏第1段. * |
| 姚小利.聚烯烃工业生产装置添加剂进展.《现代塑料加工应用》.2003,第15卷(第3期),第3页右栏倒数第1段～第4页左栏第2段. * |
| 常旭升.聚烯烃薄膜抗粘连母料的研制及应用.《齐鲁石油化工》.2003,第31卷(第2期),第87页左栏第3段～第88页左栏第2段. * |
| 曹胜先等.新型开口爽滑剂母料在聚烯烃薄膜中的应用.《塑料科技》.2009,第37卷(第3期),第60页右栏倒数第3段～第61页左栏第2段. * |
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