CN100384919C - Use of crystal silicon-aluminium compound in plastic film open agent - Google Patents
Use of crystal silicon-aluminium compound in plastic film open agent Download PDFInfo
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- CN100384919C CN100384919C CNB2005100126867A CN200510012686A CN100384919C CN 100384919 C CN100384919 C CN 100384919C CN B2005100126867 A CNB2005100126867 A CN B2005100126867A CN 200510012686 A CN200510012686 A CN 200510012686A CN 100384919 C CN100384919 C CN 100384919C
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Abstract
The present invention relates to a use of a crystal silicon aluminium compound in a plastic film opening agent. Used as an inorganic opening agent, the crystal silicon aluminium compound is added in front of a single or double screw device before the addition of a material for producing a parent material in the production process of a plastic film; a crystal silicon aluminium compound has the following molecular formula: Na2O. Al2O3.2SiO2.4.5H2O and has the following structural formula: Na12[(AlO2)12. (SiO2)12]. 27H2O; a crystal is regular and porous and has gaps, the granularity is from 1 mum to 13 mum, the content of a solution is 1%, the pH value is at most 11 at 25 DEG C, and the cauterant lost amount is at most 22%; the crystal is composed of a core kernel and a reticulate composite layer compounded outside the core kernel, and the core kernel and the reticulate composite layer are tightly adsorbed and are integrally compounded, wherein the core kernel forms a regular cubic shape, a regular hexahedral shape or a regular octahedral shape, and the integrated body is regular and has pores mutually communicated; the number of the reticulate composite layer is one or more than one, and meshes of the reticulate composite layer form a regular or irregular geometric shape.
Description
Technical field
The invention belongs to the auxiliary agent that improves the plastic film open performance, be specifically related to the application of a kind of crystal silicon-aluminium compound in plastic film open agent.
Background technology
The plastics film product is mainly used in the plastic wrapping industry, and the output of plastics film is occupied quite great proportion in whole plastic prod, and plastics film is almost ubiquitous in industry and people's daily life.Along with the development of additives for plastics and the raising of modification technology, make the application performance of plastics film become better and better, Application Areas is also more and more wide in range.
China's plastic wrapping industry development situation turns for the better, but also is faced with some problems, causes on the low side all multifactor of plastics film product performance and state of the art at all. and the quality of its opening performance is one of main problem; The product of opening poor performance can't normally use on automatic packing machine, and its purposes is greatly limited.
Plastic film open poor (being adhesion) problem generally has the reason of two aspects:
A kind of is owing to form the vacuum closed state between the closed caudacoria of film, is difficult for separately; Another kind is that its surface has and a large amount of exposes branch in chain behind the film forming, in the mutual winding that has produced after two film closures between the macromolecular chain, it can't be opened; The reason that causes film opening difficulty is the two coexistence, and the latter is a major cause.
The opening agent that is used at present to improve the plastic film open performance both at home and abroad mainly contains two big series products, promptly inorganic opening agent and organic slipping agent two big classes.Natural mineral and synthetic sodium rice silicon-dioxide two classes are arranged again in inorganic opening agent.
In inorganic opening agent, silicon-dioxide is because production technology and dispersion technology mainly are external products.This product has simultaneously and improves film surface and reduce the function expose molecular chain, is a kind of good opening agent.But this valuable product has increased very big cost burden to film product in application.
Organic opening agent such as amine hydroxybenzene, erucicamide etc., its opening mechanism is after plastics film adds organic opening agent, can form one deck lubricant film at film surface, reduce intermembranous frictional coefficient, reduce mutual adhesion, so this class opening agent generally also is called antiblocking agent or slipping agent.But there is precipitate in it, influences color, heat sealability and the printing of film, exists to pollute packed article hidden danger;
Domestic commercially available inorganic opening agent such as diatomite, secondary calcium phosphate, calcium sulfate etc., be by natural mineral through a series of processing such as grinding, the particle form irregular, broad particle distribution, visible most particles are to exist with the needle-like form under Electronic Speculum.This series products taphole drilling machine reason mainly is to reach the opening purpose by the intermembranous negative pressure of uneven minimizing that increases film surface, and for the major cause that influences film opening performance, the winding problem that promptly exposes molecular chain almost can not get improving.Therefore the opening performance of film is still bad after a little while for this series products dosage, but add-on very easily has influence on Film Optics, heat sealability when big again.When film forming, produce a large amount of " flake " (hole of similar flake form or holes) simultaneously, influenced the quality of film.
Similar crystal silicon-aluminium compound product, there is commodity selling in market, but crystal habit is different with structure; it mainly is single regular polygon; usually mix other crystalline forms that 5～15% amounts are arranged or have gel about 5～10%, crystal atresia or space are few, do not have netted composite bed.The crystal silicon-aluminium compound product of prior art is mainly as sorbent material, water-softening chemicals and friction auxiliary agent.
Summary of the invention
The application's goal of the invention is researched and developed the application of crystal silicon-aluminium compound in plastic film open agent exactly.
The present invention implements by following technical solution:
Develop the application of a kind of crystal silicon-aluminium compound in plastic film open agent:
A kind of scheme is: as inorganic opening agent, before the production masterbatch in production of plastic film is reinforced, add before twin screw equipment;
Another kind of scheme is: as inorganic opening agent and be furnished with corresponding slipping agent, before the production masterbatch in production of plastic film is reinforced, add before twin screw equipment;
Described crystal silicon-aluminium compound as plastic film open agent is:
Molecular formula Na
2OAl
2O
32SiO
24.5H
2O;
Structural formula Na
12[(AlO
2)
12(SiO
2)
12] 27H
2O
Described crystal silicon-aluminium compound, porous is gapped, the crystallization of rule, granularity is 1 μ m～13 μ m, 1% solution, 25 ℃ of pH value≤11; 1000 ℃, 1h, loss on ignition≤22%;
Described crystal is by core and be compound in the outer field netted composite bed of core and constitute, and both adsorbed close are compound to be an integral body;
Described core be shaped as regular cube, regular hexahedron or regular octahedron, core entire body form rule, the hole of mutual perforation is arranged;
Described netted composite bed is one deck or more than one deck, and its mesh form is rule or irregular geometric form.
Add-on is 600ppm～1300ppm, 1000ppm～1200ppm or 0.6～1.3kg opening agent/ton plastics film.
The application of above-mentioned crystal silicon-aluminium compound in plastic film open agent is characterized in that described 1000ppm～1200ppm or 0.6～1.3kg opening agent/ton plastics film.
The size range of above-mentioned crystal silicon-aluminium compound is 1.5 μ m～5 μ m.
Advantage of the present invention is:
1. the xln silicoaluminate that contains a large amount of holes has solved vacuum seal state and the winding problem that exposes macromolecular chain between film simultaneously.
2. crystallization rule, size-grade distribution are concentrated, and have avoided in the film process because solid particulate adds the problem that produces " flake ".
3. performance can match in excellence or beauty with the silicon-dioxide of import, and the cheap suitable national conditions of cost.
Embodiment
Embodiment one
Crystal silicon-aluminium compound of the present invention is self-produced, by sodium aluminate solution and water glass reaction, forms through becoming glue, pulp, crystallization, liquid-solid separation, oven dry.
Molecular formula Na
2OAl
2O
32SiO
24.5H
2O;
Structural formula Na
12[(AlO
2)
12(SiO
2)
12] 27H
2O
Described crystal silicon-aluminium compound, porous is gapped, the crystallization of rule, granularity is 1 μ m～13 μ m, 1% solution, 25 ℃ of pH value≤11; 1000 ℃, 1h, loss on ignition≤22%;
Described crystal is by core and be compound in the outer field netted composite bed of core and constitute, and both adsorbed close are compound to be an integral body;
Described core be shaped as regular cube, regular hexahedron or regular octahedron, core entire body form rule, the hole of mutual perforation is arranged; Described netted composite bed is more than one deck, and its mesh form is rule or irregular geometric form.
Concrete operations:
1, the ratio in LDPE powder: crystal silicon-aluminium compound=100kg: 60kg adds the preceding premixed device (mixing of limit edged) of tablets press, makes the opening masterbatch that contains this opening agent about 37.5% through the double-screw extruding pelletizing machine;
2, by the LDPE powder: the carrying out in proportion of above-mentioned masterbatch=1000kg: 2.7kg enters inflation film manufacturing machine after banburying mixes and carries out blown film;
3, the plastics film that contains the opening agent that obtains, its performance is: mist degree 6.3, film stretching intensity (indulging) 23.5, film stretching intensity (horizontal stroke) 14.2, film elongation at break (indulging) 213, film elongation at break (horizontal stroke) 420, film friction coefficient quiet 0.223, moving 0.175, film blocking 0.642, comprehensive evaluation: top grade.
Crystal silicon-aluminium compound product of the present invention, the resin Applied Research Laboratory is applied to plastics film products such as PP, PE, PVC, PET and cigarette film, packing film, print film through Beijing swallowization limited-liability company of China Petrochemical Industry.Testing data shows, at opening agent add-on 600ppm～1300ppm, can make plastic film open agent separately and use; When being furnished with corresponding slipping agent, over-all properties is better.
Concrete service requirements: the reinforced last stage of the production masterbatch in production of plastic film adds, and adds before twin screw equipment.Through on probation, effect is satisfied, has reached the goal of the invention of expection.
Testing data: the mechanics of film and optical property
Annotate: 1 is blank in the table; 2 is the determination data of inorganic opening agent (as calcium sulfate); 3 is the determination data of organic opening agent (as erucicamide); 4,5 is the determination data of this crystal silicon-aluminium compound product; 6 is the determination data that adds the good industrialization LDPE product of superfine silicon dioxide and slipping agent.
Embodiment two
Crystal silicon-aluminium compound is self-produced, and the size range of crystal silicon-aluminium compound is 1.5 μ m～5 μ m; Its core be shaped as regular hexahedron, netted composite bed is more than one deck, its mesh form is the geometric form of rule; Addition is 600ppm～1300ppm, and all the other are with embodiment one.
Embodiment three
Crystal silicon-aluminium compound is self-produced, and the size range of crystal silicon-aluminium compound is 5 μ m～13 μ m; Its core be shaped as regular octahedron, netted composite bed one deck, its mesh form is rule or irregular geometric form; Addition is 1000ppm～1200, and all the other are with embodiment one.
Embodiment four
Crystal silicon-aluminium compound is self-produced, and the size range of crystal silicon-aluminium compound is 1.5 μ m～5 μ m; Its core be shaped as positive tetrahedron, netted composite bed is more than one deck, its mesh form is irregular geometric form; Addition is 0.6～1.3kg opening agent/ton plastics film, and all the other are with embodiment one.
Claims (6)
1. the application of crystal silicon-aluminium compound in plastic film open agent is characterized in that: before feeding in raw material as the production masterbatch of inorganic opening agent in production of plastic film, add before list or twin screw equipment;
Described crystal silicon-aluminium compound as plastic film open agent is:
Molecular formula Na
2OAl
2O
32SiO
24.5H
2O;
Structural formula Na
12[(AlO
2)
12(SiO
2)
12] 27H
2O
Described crystal silicon-aluminium compound, porous is gapped, the crystallization of rule, granularity is 1 μ m～13 μ m, 1% solution, 25 ℃ of pH value≤11; 1000 ℃, 1h, loss on ignition≤22%;
Described crystal is by core and be compound in the outer field netted composite bed of core and constitute, and both adsorbed close are compound to be an integral body;
Described core be shaped as regular cube, regular hexahedron or regular octahedron, core entire body form rule, the hole of mutual perforation is arranged;
Described netted composite bed is one deck or more than one deck, and its mesh form is rule or irregular geometric form.
2. the application of crystal silicon-aluminium compound in plastic film open agent is characterized in that: as inorganic opening agent and be furnished with corresponding slipping agent, before the production masterbatch in production of plastic film is reinforced, add before list or twin screw equipment.
3. according to claim 1 or 2 application of described crystal silicon-aluminium compound in plastic film open agent, it is characterized in that: addition is 600ppm～1300ppm.
4. according to claim 1 or 2 application of described crystal silicon-aluminium compound in plastic film open agent, it is characterized in that: addition is 1000ppm～1200ppm.
5. according to claim 1 or 2 application of described crystal silicon-aluminium compound in plastic film open agent, it is characterized in that: addition is 0.6～1.3kg opening agent/ton plastics film
6. according to claim 1 or 2 application of described crystal silicon-aluminium compound in plastic film open agent, the size range that it is characterized in that described crystal silicon-aluminium compound is 1.5 μ m～5 μ m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100126867A CN100384919C (en) | 2005-07-20 | 2005-07-20 | Use of crystal silicon-aluminium compound in plastic film open agent |
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|---|---|---|---|
| CNB2005100126867A CN100384919C (en) | 2005-07-20 | 2005-07-20 | Use of crystal silicon-aluminium compound in plastic film open agent |
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|---|---|
| CN1709950A CN1709950A (en) | 2005-12-21 |
| CN100384919C true CN100384919C (en) | 2008-04-30 |
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| CN112147727B (en) * | 2020-08-19 | 2022-11-18 | 广州凌玮科技股份有限公司 | Reflecting film with higher reflectivity |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994003534A1 (en) * | 1992-07-31 | 1994-02-17 | Joo Gabor | Synthetic resin (plastic) compositions having an adsorptive effect and packaging films prepared therefrom |
| CA2137870A1 (en) * | 1993-12-14 | 1995-06-15 | Klaus Goritz | Stabilizer for chlorine-containing polymers |
| US6379787B1 (en) * | 1995-02-03 | 2002-04-30 | Exxonmobil Oil Corporation | Coating composition for a plastic film |
| JP2005015568A (en) * | 2003-06-24 | 2005-01-20 | Fujimori Kogyo Co Ltd | Hygroscopic composition, hygroscopic molded body and hygroscopic laminate |
-
2005
- 2005-07-20 CN CNB2005100126867A patent/CN100384919C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994003534A1 (en) * | 1992-07-31 | 1994-02-17 | Joo Gabor | Synthetic resin (plastic) compositions having an adsorptive effect and packaging films prepared therefrom |
| CA2137870A1 (en) * | 1993-12-14 | 1995-06-15 | Klaus Goritz | Stabilizer for chlorine-containing polymers |
| US6379787B1 (en) * | 1995-02-03 | 2002-04-30 | Exxonmobil Oil Corporation | Coating composition for a plastic film |
| JP2005015568A (en) * | 2003-06-24 | 2005-01-20 | Fujimori Kogyo Co Ltd | Hygroscopic composition, hygroscopic molded body and hygroscopic laminate |
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|---|---|
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