Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of fluoride modified polyvinyl alcohol film

A polyvinyl alcohol film, fluoride technology, applied in the direction of coating, etc., can solve problems such as difficulty in preventing water vapor infiltration, decrease in barrier property, decrease in tensile strength of film, etc.

Inactive Publication Date: 2019-07-12
董洪军
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the hydrophobic surface still has a certain degree of wettability, it is difficult to prevent the infiltration of water vapor in a water vapor environment, which will reduce the tensile strength of the film and also reduce the barrier property.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of fluoride modified polyvinyl alcohol film
  • A kind of fluoride modified polyvinyl alcohol film
  • A kind of fluoride modified polyvinyl alcohol film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10 and comparative example 1～3

[0051] According to the ratio (mass ratio) in Table 1, the above-mentioned reactive compound containing perfluoropolyether group and the reactive compound containing perfluoroalkyl group are prepared into a solution with a concentration of 1%, and the solvent adopts perfluorinated A mixed solvent with a mass ratio of cyclic ether and butyl acetate of 1:1.

[0052] Table 1

[0053]

[0054]

[0055] Polyvinyl alcohol (purchased from Shanghai Kaidu Industrial Development Co., Ltd.) was dissolved into a 7% aqueous solution, and then cast into a film to prepare a film substrate. Then use a high-pressure spray gun to spray the composition solution prepared in the above-mentioned Examples 1-14 on one of the surfaces of the PVA film, wait for the solvent to air dry naturally, and solidify at room temperature for 2 hours to obtain the fluoride-modified polyvinyl alcohol film of the present invention .

[0056] Adopt following test method to verify beneficial effect of the pres...

Embodiment 4

[0079] The environmental scanning electron microscope of embodiment 4 fluoride modified polyvinyl alcohol film is as figure 1 , 2 shown, from figure 1 It can be seen that the fluoride-modified polyvinyl alcohol film is smooth as a whole, without obvious large particle protrusions; from figure 2 It can be seen that the pattern on the surface of the fluoride-modified polyvinyl alcohol film is relatively smooth without obvious unevenness. Environmental scanning electron microscope of unmodified polyvinyl alcohol film (comparative example 6) such as image 3 , Figure 4 shown, from image 3 It can be seen that the overall surface of the unmodified film is rough with obvious protrusions; from Figure 4 It can be seen that there is a clear fracture surface at the raised edge.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a fluoride-modified polyvinyl alcohol thin film. The thin film comprises polyvinyl alcohol thin film base material and a fluoride-containing surface treatment layer, and is obtained by spraying a fluoride-containing surface treatment composition onto one surface of a polyvinyl alcohol-containing thin film base material, and the fluoride-containing surface treatment composition comprises one or two of perfluoropolyether group-containing reactive compound and perfluoroalkyl group-containing reactive compound. According to the fluoride-modified polyvinyl alcohol thin film, the properties of the polyvinyl alcohol body can be kept through a non-modified surface, the waterproof performance of the modified surface is excellent, and the modified surface is difficultly wetted with water; and the mechanical performance and barrier property of the thin film can still be better kept under water vapor environment.

Description

technical field [0001] The invention relates to a fluoride-modified polyvinyl alcohol film, which belongs to the technical field of hydrophobic modification of biodegradable packaging materials. Background technique [0002] Polyvinyl alcohol (poly-(vinyl alcohol), PVA) is a biodegradable, water-soluble synthetic polymer. Because of its biodegradability, water solubility, excellent film-forming properties, cohesive properties, and excellent gas barrier properties, especially the exceptionally excellent barrier properties to oxygen, it has been widely used in the fields of food, medicine, pesticides and industrial packaging materials ; At the same time, it has been approved by the US Department of Agriculture for the packaging of meat and poultry products. [0003] PVA has a strict linear structure, its chemical properties are stable, the hydrogen bonds between molecules make it have sufficient thermal stability, and the hydroxyl groups on the molecular chain make it highly ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/00C08J7/04C08J7/06C08L29/04
CPCC08J7/0427C08J7/06C08J2329/04C08J2471/00
Inventor 向德轩刘婷王梅梅胡扬剑张再兴汤艳
Owner 董洪军