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

A preparation method of organosilicon modified PET optically transparent film

An optically transparent and organosilicon technology, applied in the field of preparation of organosilicon-modified PET optically transparent films, can solve the problems of poor heat-sealing performance of PET films, reduced PET crystallization performance, etc. The effect of adhesion

Active Publication Date: 2022-05-27
浙江博励恒科技有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of poor heat-sealing performance of ordinary PET films, the present invention proposes a method for preparing organosilicon-modified PET optically transparent films to prepare organosilicon-modified PET, reduce the crystallization performance of PET, and improve its aging resistance performance, in addition, because there are organic silicon segments in the modified PET molecules, which improves the adhesion between the silicone coated on the PET surface and the PET film

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Add 166.13Kg of terephthalic acid, 62.068Kg of ethylene glycol, 0.31Kg of diphenyldihydroxysilane and 0.04587Kg of germanium oxide into a clean reactor with stirring, decompression and vacuuming and condensation systems. 133mmHg, 200 ℃ first esterification reaction 2h to obtain low degree of polymerization (X=1~4), silicone modified polyethylene terephthalate.

[0026] (2) Silicon modified polyethylene terephthalate (PET, n=150) was obtained by final polycondensation reaction at 133mmHg and 280~285°C for 8h to obtain a final polyester product with a high degree of polymerization.

[0027] (3) Pre-dry the obtained silicone modified PET resin slices to prevent hydrolysis, then extrude amorphous thick slices through a T-die at 280°C in an extruder, and quench them with cooling water at 25°C for 2 minutes to make the chips. It remains amorphous for stretch orientation. The thick sheet is then biaxially stretched by a tenter to become a PET film. Longitudinal stretchin...

Embodiment 2

[0030] (1) Add 166.13Kg of terephthalic acid, 80.00Kg of ethylene glycol, and 2.42Kg of α,ω-dihydroxydimethylsilicone oil with a viscosity of 80cp to a clean reactor with stirring, vacuuming and condensation systems and 0.124Kg of antimony trioxide, and esterified at 180mmHg and 180℃ for 4h to obtain low degree of polymerization (X=1~4) silicone modified polyethylene terephthalate.

[0031] (2) The final polycondensation reaction was carried out at 180mmHg and 280~285℃ for 12h to obtain the final polyester product with high degree of polymerization, silicone-modified polyethylene terephthalate (PET, n=200).

[0032](3) First pre-dry the obtained silicone modified PET resin chips to prevent hydrolysis, then extrude amorphous thick slices through a T-die at 280°C in an extruder, and quench them with cooling water at 40°C for 6 minutes to make the chips. It remains amorphous for stretch orientation. The thick sheet is then biaxially stretched by a tenter to become a PET film. L...

Embodiment 3

[0035] (1) Add 166.13Kg of terephthalic acid, 69.078Kg of ethylene glycol, and 10.3617Kg of α,ω-dihydroxymethyl phenyl with a viscosity of 800cp to a clean reactor with stirring, vacuuming and condensation systems. Silicone oil and 0.00235Kg of ethylene glycol antimony were first esterified at 160mmHg and 200℃ for 3h to obtain low degree of polymerization (X=1~4) silicone modified polyethylene terephthalate.

[0036] (2) The final polycondensation reaction was carried out at 160mmHg and 290~295℃ for 6h to obtain the final polyester product with high degree of polymerization, silicone-modified polyethylene terephthalate (PET, n=130).

[0037] (3) Pre-dry the obtained silicone modified PET resin chips to prevent hydrolysis, then extrude amorphous thick slices through a T-die at 260°C in an extruder, and quench them with cooling water at 30°C for 2 minutes to make the chips. It remains amorphous for stretch orientation. The thick sheet is then biaxially stretched by a tenter to ...

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

PropertyMeasurementUnit
temperatureaaaaaaaaaa
stretch ratioaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of organic silicon technology. In order to solve the problem of poor heat sealing performance of ordinary PET films, the invention proposes a preparation method of organic silicon-modified PET optically transparent films: Polyethylene terephthalate, and then finally polycondensed into the final polyester product with a high degree of polymerization, silicone-modified polyethylene terephthalate, and then made into a film with better thermal stability. The prepared silicone-modified PET can reduce the crystallization performance of PET and improve its aging resistance. At the same time, because the modified PET molecule has a silicone segment, the silicone and PET film coated on the PET surface are improved. of adhesive force.

Description

technical field [0001] The invention relates to the technical field of organic silicon, in particular to a preparation method of an organic silicon modified PET optically transparent film. Background technique [0002] Ordinary PET resin is a crystalline polymer. On the one hand, the degree of crystallinity and grain size will affect the optical properties of the PET film, such as transparency. If it is heat-sealed, there will be serious shrinkage deformation (shrinkage deformation 2~2.5%). Therefore, ordinary PET films do not have heat sealing properties. To solve this problem, it is usually compounded with PE film or CPP film. In this way, it is necessary to increase PE or CPP and adhesive materials and composite processing procedures, resulting in labor and material, and increased costs, thus limiting the application of PET films to a certain extent. [0003] Copolymerization modification is one of the effective methods to improve the heat-sealing performance of PET. T...

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): C08J5/18C08L67/02C08G63/695C08G63/78B29C48/08B29C55/12
CPCC08J5/18C08G63/6956C08G63/78C08J2367/02
Inventor 华西林杨雄发刘江玲吴于飞
Owner 浙江博励恒科技有限公司