CN110951098A - Method for forming blown film by polyamide resin - Google Patents
Method for forming blown film by polyamide resin Download PDFInfo
- Publication number
- CN110951098A CN110951098A CN201911088734.9A CN201911088734A CN110951098A CN 110951098 A CN110951098 A CN 110951098A CN 201911088734 A CN201911088734 A CN 201911088734A CN 110951098 A CN110951098 A CN 110951098A
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- CN
- China
- Prior art keywords
- polyamide
- film
- derived
- dicarboxylic acid
- extruding
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 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
-
- 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
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
-
- 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
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2377/06—Polyamides derived from polyamines and polycarboxylic acids
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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)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Polyamides (AREA)
Abstract
The invention discloses a method for forming a blown film by polyamide resin, which comprises the step of extruding a polyamide copolymer to form a polyamide film, wherein the amide copolymer comprises a structural unit of diamine and a structural unit of dicarboxylic acid, the structural unit of diamine is derived from 1, 3-bis (aminomethyl) cyclohexane, the structural unit of dicarboxylic acid is derived from isophthalic acid and linear aliphatic dicarboxylic acid with 9-11 carbon atoms, and the problem of poor heat resistance of the polyamide film in the prior art is solved.
Description
Technical Field
The invention belongs to the technical field of polyamide resin materials, and relates to a method for forming a blown film by polyamide resin.
Background
Multilayer coextruded blown films are used for flexible packaging applications, typical films comprising multiple layers formed from different polymers, such as one or more of the following: a polyamide layer, a polyethylene layer, a layer formed of ethylene vinyl alcohol (EVOH) as an oxygen barrier, a layer for moisture protection formed of polyolefin, or one or more tie layers, such as a layer formed of an anhydride-modified ethylene acrylate resin and maleic anhydride-grafted polyethylene, but the conventional blown film formed of a polyamide resin is inferior in transparency and heat resistance, and the practicality of the blown film formed of a polyamide resin is impaired.
Disclosure of Invention
The invention aims to provide a method for forming a blown film by using a polyamide resin, which solves the problem of poor heat resistance of the polyamide film in the prior art.
The technical scheme adopted by the invention is that the method for forming the blown film by the polyamide resin comprises the step of extruding the polyamide copolymer to form the polyamide film.
The invention is also characterized in that:
the polyamide copolymer comprises a diamine structural unit and a dicarboxylic acid structural unit, wherein the diamine structural unit is derived from 1, 3-bis (aminomethyl) cyclohexane, and the dicarboxylic acid structural unit is derived from isophthalic acid and linear aliphatic dicarboxylic acid with 9-11 carbon atoms.
From 70 mol% to 100 mol% of the structural units of the diamine are derived from 1, 3-bis (aminomethyl) cyclohexane.
50 to 70 mol% of the structural units of the dicarboxylic acid are derived from isophthalic acid, 50 to 70 mol% are derived from a C9-11 linear aliphatic dicarboxylic acid, and the structural units derived from terephthalic acid are not substantially included.
Extruding the polyamide copolymer is specifically to form air bubbles in the extruded polyamide copolymer by injecting air through an injection port, and aggregating the extruded polyamide copolymer into a polyamide film with one or more rolls.
Further comprising: extruding a polyethylene polymer to form a polyethylene film and combining a polyamide film and a polyethylene film to form a multilayer film.
The invention has the beneficial effects that: the method for forming the blown film by the polyamide resin solves the problem of poor heat resistance of the polyamide film in the prior art, and is simple, high in transmittance and excellent in heat aging resistance.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The present invention is a method of forming a blown film of a polyamide resin comprising extruding a polyamide copolymer to form a polyamide film. The polyamide copolymer comprises a diamine structural unit and a dicarboxylic acid structural unit, wherein the diamine structural unit is derived from 1, 3-bis (aminomethyl) cyclohexane, and the dicarboxylic acid structural unit is derived from isophthalic acid and linear aliphatic dicarboxylic acid with 9-11 carbon atoms.
From 70 mol% to 100 mol% of the structural units of the diamine are derived from 1, 3-bis (aminomethyl) cyclohexane.
50 to 70 mol% of the structural units of the dicarboxylic acid are derived from isophthalic acid, 50 to 70 mol% are derived from a C9-11 linear aliphatic dicarboxylic acid, and the structural units derived from terephthalic acid are not substantially included. Extruding the polyamide copolymer is specifically to form air bubbles in the extruded polyamide copolymer by injecting air through an injection port, and aggregating the extruded polyamide copolymer into a polyamide film with one or more rolls.
Further comprising: extruding a polyethylene polymer to form a polyethylene film, and combining the polyamide film and the polyethylene film to form a multilayer film.
Example 1
The present invention is a method of forming a blown film of a polyamide resin comprising extruding a polyamide copolymer to form a polyamide film. The polyamide copolymer comprises a diamine structural unit derived from 1, 3-bis (aminomethyl) cyclohexane and a dicarboxylic acid structural unit derived from isophthalic acid, a linear aliphatic dicarboxylic acid having a carbon number of 9.
70 mol% of the structural units of the diamine are derived from 1, 3-bis (aminomethyl) cyclohexane.
50 mol% of the structural units of the dicarboxylic acid are derived from isophthalic acid, 50 mol% are derived from a linear aliphatic dicarboxylic acid having 9 carbon atoms, and the structural units derived from terephthalic acid are not substantially contained. Extruding the polyamide copolymer is specifically to form air bubbles in the extruded polyamide copolymer by injecting air through an injection port, and aggregating the extruded polyamide copolymer into a polyamide film with one or more rolls.
Further comprising: extruding a polyethylene polymer to form a polyethylene film, and combining the polyamide film and the polyethylene film to form a multilayer film.
Example 2
The present invention is a method of forming a blown film of a polyamide resin comprising extruding a polyamide copolymer to form a polyamide film. The polyamide copolymer comprises a diamine structural unit derived from 1, 3-bis (aminomethyl) cyclohexane and a dicarboxylic acid structural unit derived from isophthalic acid, a linear aliphatic dicarboxylic acid having a carbon number of 10.
90 mol% of the structural units of the diamine are derived from 1, 3-bis (aminomethyl) cyclohexane.
60 mol% of the structural units of the dicarboxylic acid are derived from isophthalic acid, 60 mol% are derived from a linear aliphatic dicarboxylic acid having 10 carbon atoms, and the structural units derived from terephthalic acid are not substantially contained. Extruding the polyamide copolymer is specifically to form air bubbles in the extruded polyamide copolymer by injecting air through an injection port, and aggregating the extruded polyamide copolymer into a polyamide film with one or more rolls.
Further comprising: extruding a polyethylene polymer to form a polyethylene film, and combining the polyamide film and the polyethylene film to form a multilayer film.
Example 3
The present invention is a method of forming a blown film of a polyamide resin comprising extruding a polyamide copolymer to form a polyamide film. The polyamide copolymer comprises a diamine structural unit derived from 1, 3-bis (aminomethyl) cyclohexane and a dicarboxylic acid structural unit derived from isophthalic acid, a linear aliphatic dicarboxylic acid having a carbon number of 10.
80 mol% of the structural units of the diamine are derived from 1, 3-bis (aminomethyl) cyclohexane.
60 mol% of the structural units of the dicarboxylic acid are derived from isophthalic acid, 60 mol% are derived from a linear aliphatic dicarboxylic acid having 10 carbon atoms, and the structural units derived from terephthalic acid are not substantially contained. Extruding the polyamide copolymer is specifically to form air bubbles in the extruded polyamide copolymer by injecting air through an injection port, and aggregating the extruded polyamide copolymer into a polyamide film with one or more rolls.
Further comprising: extruding a polyethylene polymer to form a polyethylene film, and combining the polyamide film and the polyethylene film to form a multilayer film.
Example 4
The present invention is a method of forming a blown film of a polyamide resin comprising extruding a polyamide copolymer to form a polyamide film. The polyamide copolymer comprises a diamine structural unit derived from 1, 3-bis (aminomethyl) cyclohexane and a dicarboxylic acid structural unit derived from isophthalic acid, a linear aliphatic dicarboxylic acid having a carbon number of 11.
100 mol% of the structural units of the diamine are derived from 1, 3-bis (aminomethyl) cyclohexane.
70 mol% of the structural units of the dicarboxylic acid are derived from isophthalic acid, 70 mol% are derived from a linear aliphatic dicarboxylic acid having 11 carbon atoms, and the structural units derived from terephthalic acid are not substantially contained. Extruding the polyamide copolymer is specifically to form air bubbles in the extruded polyamide copolymer by injecting air through an injection port, and aggregating the extruded polyamide copolymer into a polyamide film with one or more rolls.
Further comprising: extruding a polyethylene polymer to form a polyethylene film, and combining the polyamide film and the polyethylene film to form a multilayer film.
The method for forming the blown film by the polyamide resin solves the problem of poor heat resistance of the polyamide film in the prior art, and is simple, high in transmittance and excellent in heat aging resistance.
Claims (6)
1. A method of forming a blown film of a polyamide resin, comprising extruding a polyamide copolymer to form a polyamide film.
2. The method for forming a blown film from a polyamide resin according to claim 1, wherein the polyamide copolymer comprises a diamine structural unit derived from 1, 3-bis (aminomethyl) cyclohexane and a dicarboxylic acid structural unit derived from isophthalic acid or a linear aliphatic dicarboxylic acid having 9 to 11 carbon atoms.
3. The method of claim 2, wherein 70 to 100 mol% of the diamine structural units are derived from 1, 3-bis (aminomethyl) cyclohexane.
4. The method for forming a blown film from a polyamide resin according to claim 1, wherein 50 to 70 mol% of the structural units of the dicarboxylic acid are derived from isophthalic acid, 50 to 70 mol% are derived from a linear aliphatic dicarboxylic acid having 9 to 11 carbon atoms, and substantially no structural units derived from terephthalic acid are contained.
5. The method of claim 1, wherein the extruding the polyamide copolymer comprises injecting air through an injection port to form air bubbles in the extruded polyamide copolymer, and the extruding the polyamide copolymer is gathered into the polyamide film by one or more rollers.
6. The method of forming a blown film of a polyamide resin as claimed in claim 1, further comprising: extruding a polyethylene polymer to form a polyethylene film, and combining the polyamide film and the polyethylene film to form a multilayer film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911088734.9A CN110951098A (en) | 2019-11-08 | 2019-11-08 | Method for forming blown film by polyamide resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911088734.9A CN110951098A (en) | 2019-11-08 | 2019-11-08 | Method for forming blown film by polyamide resin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110951098A true CN110951098A (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911088734.9A Pending CN110951098A (en) | 2019-11-08 | 2019-11-08 | Method for forming blown film by polyamide resin |
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| CN (1) | CN110951098A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107709406A (en) * | 2015-06-22 | 2018-02-16 | 三菱瓦斯化学株式会社 | Polyamide and products formed |
-
2019
- 2019-11-08 CN CN201911088734.9A patent/CN110951098A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107709406A (en) * | 2015-06-22 | 2018-02-16 | 三菱瓦斯化学株式会社 | Polyamide and products formed |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200403 |
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| RJ01 | Rejection of invention patent application after publication |