CN104845368A - Preparation process of shield plastic film - Google Patents
Preparation process of shield plastic film Download PDFInfo
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- CN104845368A CN104845368A CN201510154473.1A CN201510154473A CN104845368A CN 104845368 A CN104845368 A CN 104845368A CN 201510154473 A CN201510154473 A CN 201510154473A CN 104845368 A CN104845368 A CN 104845368A
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- plastic film
- polyamic acid
- preparation technology
- solution
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08L79/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1003—Preparatory processes
- C08G73/1007—Preparatory processes from tetracarboxylic acids or derivatives and diamines
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1067—Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The present invention discloses a preparation process of a shield plastic film. The process comprises: starting material treatment, resin synthesis, steel strip casting, imidization treatment and the like, thereby forming the film. According to the present invention, diamine or dianhydride units having a higher rigid structure are directly used, polyimide matrix is prepare by means of homopolymerization and copolymerization, thereby improving strength, rigidity and dimensional stability of the shield plastic film; with the subsequently two-directional stretching and thermal treatment processes, the longitudinal and horizontal modulus of the shield plastic film is further improved, and the thermal expansion coefficient and thermal shrinking coefficient are reduced. The preparation process of a shield plastic film according to the present invention is simple and the preparation process is simply controllable.
Description
Technical field
The present invention relates to a kind of preparation technology of plastic film.
Background technology
Now widely used agricultural plastics blow molding processing film material is mainly with LLDPE (LLDPE) and hp-ldpe (LDPE). after high density polyethylene(HDPE) (HDPE) two or three resin alloy through extruding, blowing processes.But due to the impact in recent years by international energy crisis, crude oil price remains high, and this causes its derived product polyvinyl resin price Continued; And plastics, especially agricultural plastic product price floats few, and therefore vinyon tubing, film market price raise up thereupon, and wide farmers is difficult to accept.
The polymkeric substance that the vinyon plastic sheeting for farm use of traditional structure is is basic structural unit with pyromellitic acid anhydride (PMDA) and 4 ' 4-diaminodiphenyl oxide (ODA), by the restriction of its chemical structure, there is lower Young's modulus and larger linear expansivity and percent thermal shrinkage.The method of traditional raising vinyon plastic sheeting for farm use modulus is by adding rigid inorganic nano-filler, adopts the method for in-situ polymerization to prepare vinyon plastic sheeting for farm use hybrid film, to improve elasticity modulus of materials and dimensional stability.But the vinyon plastic sheeting for farm use that this method is obtained, intensity is low, poor rigidity, dimensional stability are bad.
Summary of the invention
The technical problem to be solved in the present invention overcomes existing defect, provides a kind of preparation technology of plastic film.
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
The preparation technology of a kind of plastic film of the present invention, it comprises the following steps:
(1) Feedstock treating
Aromatic diamines and biphenyl dianhydride carried out grind, pulverize, dry;
(2) resins synthesis
Be successively join the aromatic diamines after step (1) process and biphenyl dianhydride in dimethylacetamide solution carry out dissolve and react at 1: 1 ~ 1: 1.1 according to mass ratio, obtain polyamic acid solution, deaeration is laggard to be entered to salivate operation;
(3) steel band salivation
Carry out steel band salivation through the polyamic acid resin solution of step (2) gained and make polyamic acid solid film;
(4) imidization process
First, when the polyamic acid solid film after salivation being progressively heated to volatilization temperature required for desolventizing and stretching will be close temperature; Afterwards, film is longitudinally elongated; Finally, at 350 ~ 400 DEG C, carry out pyroprocessing, make polyamic acid be converted into polyimide;
(5) film forming
After film after step (4) imidization process is carried out two-way stretch and thermal treatment, obtain plastic film finished product.
Further, in step (1), described aromatic diamines is the one in mphenylenediamine or Ursol D.
Further, in step (1), described biphenyl dianhydride can also be aromatic dianhydride.
Further, in step (1), described aromatic diamines is withering under vacuo, and its vacuum tightness is 80Kpa ~ 100Kpa, and drying temperature is 160 ~ 180 DEG C, 4 ~ 5 hours time of drying.
Further, in step (1), described biphenyl dianhydride is dried in drying room, and its storing temperature is 180 ~ 210 DEG C, baking time 2 ~ 5 hours.
Further, in step (2), the massfraction of described dimethylacetamide solution is 15% ~ 25%.
Further, described dimethylacetamide solution can also be dimethyl formamide solution or N-Methyl pyrrolidone solution.
The beneficial effect that the present invention reaches is:
Present invention process process is simple, preparation process easily controls; By directly selecting the diamines or dianhydride units with higher rigid structure, adopt the method for homopolymerization or copolymerization to prepare polyimide matrix, thus improve the intensity of plastic film, rigidity and dimensional stability; By follow-up two-way stretch and thermal treatment process, further increase the modulus of plastic film vertical, horizontal, reduce its thermal expansivity and percent thermal shrinkage.
Embodiment
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Embodiment 1
(1) Feedstock treating
Carried out by mphenylenediamine grinding, pulverizing, then by its drying treatment under vacuo, vacuum tightness is 90Kpa, and temperature is 160 DEG C, 5 hours time of drying;
Carried out by biphenyl dianhydride grinding, pulverizing, then it dried in drying room, storing temperature is 180 DEG C, and baking time is 5 hours, stand-by after being down to room temperature;
(2) resins synthesis
By the mphenylenediamine after step (1) process and biphenyl dianhydride be successively join in dimethylacetamide solution (its massfraction be 15%) carry out dissolve and react at 1: 1 according to mass ratio, obtain polyamic acid solution, deaeration is laggard to be entered to salivate operation;
(3) steel band salivation
Carry out steel band salivation through the polyamic acid resin solution of step (2) gained and make polyamic acid solid film;
(4) imidization process
First, when the polyamic acid solid film after salivation being progressively heated to volatilization temperature required for desolventizing and stretching will be close temperature; Afterwards, film is longitudinally elongated; Finally, at 400 DEG C, carry out pyroprocessing, make polyamic acid be converted into polyimide;
(5) film forming
After film after step (4) imidization process is carried out two-way stretch and thermal treatment, obtain plastic film finished product.
Embodiment 2
(1) Feedstock treating
Carried out by Ursol D grinding, pulverizing, then by its drying treatment under vacuo, vacuum tightness is 80Kpa, and temperature is 180 DEG C, 4 hours time of drying;
Aromatic dianhydride carried out grinding, pulverizing, then it dried in drying room, storing temperature is 210 DEG C, and baking time is 2 hours, stand-by after being down to room temperature;
(2) resins synthesis
By the Ursol D after step (1) process and aromatic dianhydride be successively join in dimethyl formamide solution (its massfraction be 25%) carry out dissolve and react at 1: 1.1 according to mass ratio, obtain polyamic acid solution, deaeration is laggard to be entered to salivate operation;
(3) steel band salivation
Carry out steel band salivation through the polyamic acid resin solution of step (2) gained and make polyamic acid solid film;
(4) imidization process
First, when the polyamic acid solid film after salivation being progressively heated to volatilization temperature required for desolventizing and stretching will be close temperature; Afterwards, film is longitudinally elongated; Finally, at 350 DEG C, carry out pyroprocessing, make polyamic acid be converted into polyimide;
(5) film forming
After film after step (4) imidization process is carried out two-way stretch and thermal treatment, obtain plastic film finished product.
Embodiment 3
(1) Feedstock treating
Carried out by Ursol D grinding, pulverizing, then by its drying treatment under vacuo, vacuum tightness is 100Kpa, and temperature is 170 DEG C, 4.5 hours time of drying;
Carried out by biphenyl dianhydride grinding, pulverizing, then it dried in drying room, storing temperature is 200 DEG C, and baking time is 3 hours, stand-by after being down to room temperature;
(2) resins synthesis
By the Ursol D after step (1) process and biphenyl dianhydride be successively join in N-Methyl pyrrolidone solution (its massfraction be 20%) carry out dissolve and react at 1: 1.1 according to mass ratio, obtain polyamic acid solution, deaeration is laggard to be entered to salivate operation;
(3) steel band salivation
Carry out steel band salivation through the polyamic acid resin solution of step (2) gained and make polyamic acid solid film;
(4) imidization process
First, when the polyamic acid solid film after salivation being progressively heated to volatilization temperature required for desolventizing and stretching will be close temperature; Afterwards, film is longitudinally elongated; Finally, at 350 DEG C, carry out pyroprocessing, make polyamic acid be converted into polyimide;
(5) film forming
After film after step (4) imidization process is carried out two-way stretch and thermal treatment, obtain plastic film finished product.
To the plastic film finished product test property indices of embodiment 1 to 3, result is as follows:
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a preparation technology for plastic film, is characterized in that, comprises the following steps:
(1) Feedstock treating
Aromatic diamines and biphenyl dianhydride carried out grind, pulverize, dry;
(2) resins synthesis
Be successively join the aromatic diamines after step (1) process and biphenyl dianhydride in dimethylacetamide solution carry out dissolve and react at 1: 1 ~ 1: 1.1 according to mass ratio, obtain polyamic acid solution, deaeration is laggard to be entered to salivate operation;
(3) steel band salivation
Carry out steel band salivation through the polyamic acid resin solution of step (2) gained and make polyamic acid solid film;
(4) imidization process
First, when the polyamic acid solid film after salivation being progressively heated to volatilization temperature required for desolventizing and stretching will be close temperature; Afterwards, film is longitudinally elongated; Finally, at 350 ~ 400 DEG C, carry out pyroprocessing, make polyamic acid be converted into polyimide;
(5) film forming
After film after step (4) imidization process is carried out two-way stretch and thermal treatment, obtain plastic film finished product.
2. the preparation technology of a kind of plastic film according to claim 1, is characterized in that, in step (1), described aromatic diamines is the one in mphenylenediamine or Ursol D.
3. the preparation technology of a kind of plastic film according to claim 1, is characterized in that, in step (1), described biphenyl dianhydride can also be aromatic dianhydride.
4. the preparation technology of a kind of plastic film according to claim 1, is characterized in that, in step (1), described aromatic diamines is withering under vacuo, its vacuum tightness is 80Kpa ~ 100Kpa, and drying temperature is 160 ~ 180 DEG C, 4 ~ 5 hours time of drying.
5. the preparation technology of a kind of plastic film according to claim 1, is characterized in that, in step (1), described biphenyl dianhydride is dried in drying room, and its storing temperature is 180 ~ 210 DEG C, baking time 2 ~ 5 hours.
6. the preparation technology of a kind of plastic film according to claim 1, is characterized in that, in step (2), the massfraction of described dimethylacetamide solution is 15% ~ 25%.
7. the preparation technology of a kind of plastic film according to claim 1, is characterized in that, in step (2), described dimethylacetamide solution can also be dimethyl formamide solution or N-Methyl pyrrolidone solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510154473.1A CN104845368A (en) | 2015-04-01 | 2015-04-01 | Preparation process of shield plastic film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510154473.1A CN104845368A (en) | 2015-04-01 | 2015-04-01 | Preparation process of shield plastic film |
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| Publication Number | Publication Date |
|---|---|
| CN104845368A true CN104845368A (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510154473.1A Pending CN104845368A (en) | 2015-04-01 | 2015-04-01 | Preparation process of shield plastic film |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110423465A (en) * | 2019-08-01 | 2019-11-08 | 江苏亚宝绝缘材料股份有限公司 | A kind of preparation method and product of the Kapton of biaxial oriented stretch in length and breadth |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0347727A (en) * | 1989-07-17 | 1991-02-28 | Mitsui Toatsu Chem Inc | Manufacture of polyimide film |
| CN100376622C (en) * | 2002-10-07 | 2008-03-26 | 帝人株式会社 | Polyimide film and process for producing the same |
| CN103145986A (en) * | 2013-03-21 | 2013-06-12 | 华威聚酰亚胺有限责任公司 | Chemical imidization accelerant of polyamide acid and polyimide thin film manufacturing method |
| CN104211973A (en) * | 2014-04-01 | 2014-12-17 | 无锡顺铉新材料有限公司 | Polyimide film |
| CN104845367A (en) * | 2015-01-14 | 2015-08-19 | 无锡龙舜实业有限公司 | Plastic agricultural film |
-
2015
- 2015-04-01 CN CN201510154473.1A patent/CN104845368A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0347727A (en) * | 1989-07-17 | 1991-02-28 | Mitsui Toatsu Chem Inc | Manufacture of polyimide film |
| CN100376622C (en) * | 2002-10-07 | 2008-03-26 | 帝人株式会社 | Polyimide film and process for producing the same |
| CN103145986A (en) * | 2013-03-21 | 2013-06-12 | 华威聚酰亚胺有限责任公司 | Chemical imidization accelerant of polyamide acid and polyimide thin film manufacturing method |
| CN104211973A (en) * | 2014-04-01 | 2014-12-17 | 无锡顺铉新材料有限公司 | Polyimide film |
| CN104845367A (en) * | 2015-01-14 | 2015-08-19 | 无锡龙舜实业有限公司 | Plastic agricultural film |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110423465A (en) * | 2019-08-01 | 2019-11-08 | 江苏亚宝绝缘材料股份有限公司 | A kind of preparation method and product of the Kapton of biaxial oriented stretch in length and breadth |
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Application publication date: 20150819 |