CN109291348B - Method for changing surface glossiness of film - Google Patents
Method for changing surface glossiness of film Download PDFInfo
- Publication number
- CN109291348B CN109291348B CN201811099770.0A CN201811099770A CN109291348B CN 109291348 B CN109291348 B CN 109291348B CN 201811099770 A CN201811099770 A CN 201811099770A CN 109291348 B CN109291348 B CN 109291348B
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- film
- glossiness
- roller
- casting
- silica gel
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
- B29C41/26—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length by depositing flowable material on a rotating drum
Abstract
The invention discloses a method for changing the surface glossiness of a film. In the operation steps of casting film forming, a silica gel compression roller is added in front of an active casting roller, and the pressure of mutual joint of the silica gel compression roller and the active casting roller is changed by adjusting air pressure, so that the surface glossiness of the film is changed, and the larger the pressure is, the smaller the glossiness is; the distance between the silica gel compression roller and the active casting roller is changed, and the larger the distance is, the larger the surface glossiness of the film is. The method for changing the glossiness of the surface of the film adjusts the glossiness of the casting film, the pressure of the mutual joint of the silica gel compression roller and the active casting roller and the distance between the silica gel compression roller and the active casting roller by a physical adjusting method, so that the glossiness requirement of a customer is met under the condition of unchanged formula.
Description
Technical Field
The invention belongs to the technical field of cast film preparation, and particularly relates to a method for changing the surface glossiness of a film.
Background
The cast film is a non-stretched and non-oriented flat extruded film produced by melt casting and quenching, has two modes of single-layer casting and multi-layer coextrusion casting, and has the characteristics of high production speed, high yield, excellent transparency, thickness uniformity and the like compared with blown films.
The cast film has excellent heat sealing performance and excellent transparency, is one of main composite packing base materials, is used for producing high-temperature boiling films, vacuum aluminum-plated films and the like, and has good market prospect. The gloss of cast films often needs to be adjusted to suit different needs, depending on the needs.
The glossiness adjustment of the casting film is generally realized by adopting a formula adjustment mode, products with different glossiness are realized by adjusting the formula of the casting solution, however, the formula adjustment mode is troublesome, the requirements on the glossiness are usually met after the adjustment, and other properties of the film are changed, so that the performance of the film is reduced. The extrusion casting film-making process comprises the following steps: feeding, screw extruding, die head casting, active casting roller, transition roller, stretching and cooling, checking and rolling; if a material method can be found in the preparation process to change the glossiness of the casting film, the production efficiency can be greatly improved, and different requirements of customers on the glossiness can be met.
Disclosure of Invention
The invention aims to provide a method for changing the surface glossiness of a film. The requirement of preparing casting film products with different gloss degrees under the condition of one formula is met.
A method for changing the surface glossiness of a film, the film is prepared by adopting a casting process, in the operation step of casting film forming, a silica gel compression roller is added in front of an active casting roller, and the pressure of mutual joint of the silica gel compression roller and the active casting roller is changed by adjusting the air pressure of 0.1-0.4MPa, so that the surface glossiness of the film is changed, and the higher the pressure is, the lower the glossiness is; and changing the distance between the silica gel compression roller and the active casting roller, wherein when the distance is in the range of 0-4mm, the larger the distance is, the larger the surface glossiness of the film is.
The distance between the silica gel compression roller and the active casting roller is 2mm, and when the pressure of air pressure is 0.1-0.4MPa, the glossiness of the film can be controlled within the range of 10-20.
The pressure of air pressure is 0.2MPa, and when the distance between the silica gel compression roller and the active casting roller is 3-4mm, the glossiness of the film can be controlled within the range of 20-30.
The invention has the beneficial effects that: the method for changing the glossiness of the surface of the film adjusts the glossiness of the casting film, the pressure of the mutual joint of the silica gel compression roller and the active casting roller and the distance between the silica gel compression roller and the active casting roller by a physical adjusting method, so that the glossiness requirement of a customer is met under the condition of unchanged formula.
Detailed Description
The present invention is further illustrated by the following specific examples.
The formulation of the cast film used in the following examples consisted of the following components in parts by weight: 60 parts of ethylene-propylene-butadiene copolymer, 30 parts of ethylene-vinyl acetate copolymer and 30 parts of polypropylene oxide.
Example 1
A method for changing the surface glossiness of a film, the film is prepared by adopting a casting process, in the operation step of casting film, a silica gel compression roller is added in front of an active casting roller, the distance between the silica gel compression roller and the active casting roller is 2mm, and when the pressure of air pressure is 0.2MPa, the glossiness of the film is 15; the pressure of the air pressure is 0.2MPa, and when the distance between the silica gel compression roller and the active casting roller is 4mm, the glossiness of the film is 25.
Example 2
A method for changing the surface glossiness of a film, the film is prepared by adopting a casting process, in the operation step of casting film, a silica gel compression roller is added in front of an active casting roller, the distance between the silica gel compression roller and the active casting roller is 2mm, and when the pressure of air pressure is 0.1MPa, the glossiness of the film is 10; the pressure of the air pressure is 0.2MPa, and when the distance between the silica gel compression roller and the active casting roller is 3mm, the glossiness of the film is 20.
Example 3
A method for changing the surface glossiness of a film, the film is prepared by adopting a casting process, in the operation step of casting film forming, a silica gel compression roller is added in front of an active casting roller, the distance between the silica gel compression roller and the active casting roller is 2mm, the pressure of air pressure is 0.4MPa, and the glossiness of the film is 18; the pressure of the air pressure is 0.3MPa, and when the distance between the silica gel compression roller and the active casting roller is 4mm, the glossiness of the film is 28.
The formulation of the cast film used in the following examples consisted of the following components in parts by weight: 35 parts of poly (terephthalic acid) -adipic acid-butanediol ester, 8 parts of polytetrafluoroethylene and 1 part of montmorillonite.
Example 4
A method for changing the surface glossiness of a film, the film is prepared by adopting a casting process, in the operation step of casting film, a silica gel compression roller is added in front of an active casting roller, the distance between the silica gel compression roller and the active casting roller is 2mm, and when the pressure of air pressure is 0.2MPa, the glossiness of the film is 14; the pressure of the air pressure is 0.2MPa, and when the distance between the silica gel compression roller and the active casting roller is 4mm, the glossiness of the film is 25.
Example 5
A method for changing the surface glossiness of a film, the film is prepared by adopting a casting process, in the operation step of casting film, a silica gel compression roller is added in front of an active casting roller, the distance between the silica gel compression roller and the active casting roller is 2mm, and when the pressure of air pressure is 0.1MPa, the glossiness of the film is 11; the pressure of the air pressure is 0.2MPa, and when the distance between the silica gel compression roller and the active casting roller is 3mm, the glossiness of the film is 19.
From the above experiments, it can be seen that the cast films of different formulations all have significant gloss variation in the face of changes in the physical parameters of the cast films, and the variation values are within the experimental range of the present invention.
Claims (1)
1. A method for changing the surface glossiness of a film, the film is prepared by adopting a casting process, and the method is characterized in that a silica gel compression roller is added in front of an active casting roller in the operation step of casting film, and the pressure of mutual joint of the silica gel compression roller and the active casting roller is changed by adjusting the air pressure of 0.1-0.4MPa, so that the surface glossiness of the film is changed, and the larger the pressure is, the larger the glossiness is; changing the distance between the silica gel compression roller and the active casting roller, wherein when the distance is in the range of 0-4mm, the larger the distance is, the larger the surface glossiness of the film is;
the formula of the casting film comprises the following components in parts by weight: 60 parts of ethylene-propylene-butadiene copolymer, 30 parts of ethylene-vinyl acetate copolymer and 30 parts of polypropylene oxide;
or the like, or, alternatively,
35 parts of poly (terephthalic acid) -adipic acid-butanediol ester, 8 parts of polytetrafluoroethylene and 1 part of montmorillonite;
the distance between the silica gel compression roller and the active casting roller is 2mm, and when the pressure of air pressure is from 0.1 to 0.4MPa, the glossiness of the film is controlled within the range of 10 to 20;
the pressure of the air pressure is 0.2MPa, and when the distance between the silica gel compression roller and the active casting roller is 3-4mm, the glossiness of the film is controlled within the range of 20-30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811099770.0A CN109291348B (en) | 2018-09-20 | 2018-09-20 | Method for changing surface glossiness of film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811099770.0A CN109291348B (en) | 2018-09-20 | 2018-09-20 | Method for changing surface glossiness of film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109291348A CN109291348A (en) | 2019-02-01 |
| CN109291348B true CN109291348B (en) | 2021-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811099770.0A Active CN109291348B (en) | 2018-09-20 | 2018-09-20 | Method for changing surface glossiness of film |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1205029C (en) * | 2000-04-04 | 2005-06-08 | 艾弗里·丹尼森公司 | Method for manufacturing high DOI/high gloss multifunctional thermoplastic film |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6254712B1 (en) * | 1998-12-08 | 2001-07-03 | Avery Dennison Corporation | Extrusion coating process for making high transparency protective and decorative films |
| US20020000290A1 (en) * | 2000-06-29 | 2002-01-03 | Crump Larry Scott | Curing of a gel coat on a mold |
| JP5392092B2 (en) * | 2007-11-29 | 2014-01-22 | コニカミノルタ株式会社 | Method for producing cellulose ester film |
| CN103085251B (en) * | 2011-11-02 | 2015-02-11 | 中国石油化工股份有限公司 | Device and method for extrusion casting, and biaxial tensile system and method for plastic film |
| CN202922836U (en) * | 2012-11-19 | 2013-05-08 | 佛山高明骏腾塑胶有限公司 | Press polish device used on plastic calendaring machine |
| CN103660108B (en) * | 2013-12-25 | 2016-08-17 | 上海沥高科技有限公司 | A kind of curtain coating production technology of high temperature resistant PTFE separation film |
| CN104002421A (en) * | 2014-06-19 | 2014-08-27 | 东莞市雄林新材料科技股份有限公司 | Casting cooling device |
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- 2018-09-20 CN CN201811099770.0A patent/CN109291348B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1205029C (en) * | 2000-04-04 | 2005-06-08 | 艾弗里·丹尼森公司 | Method for manufacturing high DOI/high gloss multifunctional thermoplastic film |
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| CN109291348A (en) | 2019-02-01 |
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