Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of bio-based polyester-modified polyethylene shrink film

A technology of polyester modification and polyethylene, which is applied in the field of preparation of bio-based polyester modified polyethylene shrink film, can solve the problems of losing the function of packaging, etc., and achieve the effect of low cost, simple preparation steps and good shrinkage rate

Inactive Publication Date: 2016-05-25
吴迪
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved by the present invention: Aiming at the unidirectional shrinkage of the current polyethylene shrink film, which makes it lose the function of packaging due to excessive stretching during packaging, a combination of oxalic acid and succinic acid is provided. Stir and mix with ethylene glycol, and mix with p-hydroxyanisole and other substances to prepare bio-based polyester, and then use bio-based polyester to modify polyethylene resin to prepare shrinkable film. The shrinkable film prepared by the present invention It has two-way stretchability, the longitudinal shrinkage is higher than 50%, and the lateral shrinkage is higher than 40%. At the same time, it has the characteristics of high strength and good toughness

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

example 1

[0017] First, in parts by weight, weigh 45 parts of oxalic acid, 25 parts of succinic acid and 30 parts of ethylene glycol, stir and mix them, place them in a three-necked flask, heat in a water bath at 70°C for 25 minutes, and then add oxalic acid dropwise Put 3% p-hydroxyanisole in a three-necked flask, and control the dropping rate to 2mL / min; Stop the nitrogen flow and add tetrabutyl titanate with the same quality as p-hydroxyanisole dropwise. Control the dropwise addition time for 30 minutes. After the dropwise addition is completed, vacuumize it to 15Pa, then heat up to 230°C, and keep warm for reaction. 3h, then let it stand and cool to prepare the reactant, then stir and mix the reactant with methanol for 15min according to the volume ratio of 1:5, filter and collect the filter residue, dry at 50°C for 8h, and prepare the bio-based polyester; In terms of parts, weigh 55 parts of polyethylene resin, 35 parts of bio-based polyester, 5 parts of compound antioxidant and 5 ...

example 2

[0019] First, in parts by weight, weigh 25 parts of oxalic acid, 35 parts of succinic acid and 30 parts of ethylene glycol, stir and mix them and place them in a three-necked flask, heat in a water bath at 60°C for 15 minutes, and then add oxalic acid dropwise Put 3% p-hydroxyanisole in a three-necked flask, and control the dropping rate to 2mL / min; Stop the nitrogen flow and drop tetrabutyl titanate with the same quality as p-hydroxyanisole, and control the dropping time to 25min. After the dropping is completed, vacuumize it to 10Pa, then heat up to 210°C, and keep warm for reaction 2h, then let it stand and cool to prepare the reactant, then stir and mix the reactant with methanol for 10min according to the volume ratio of 1:5, filter and collect the filter residue, dry at 45°C for 6h, and prepare the bio-based polyester; In terms of parts, weigh 45 parts of polyethylene resin, 40 parts of bio-based polyester, 7 parts of compound antioxidant and 8 parts of polyethylene tere...

example 3

[0021]First, in parts by weight, weigh 40 parts of oxalic acid, 30 parts of succinic acid and 30 parts of ethylene glycol, stir and mix them, place them in a three-necked flask, heat them in a water bath at 65°C for 20 minutes, and then add oxalic acid dropwise Put 3% p-hydroxyanisole in a three-necked flask, and control the dropping rate to 2mL / min; Stop the nitrogen flow and drop tetrabutyl titanate with the same quality as p-hydroxyanisole, and control the dropping time to 27min. After the dropping is completed, vacuumize it to 12Pa, then heat up to 220°C, and keep warm for reaction 2h, then let it stand and cool to prepare the reactant, then stir and mix the reactant with methanol for 12min according to the volume ratio of 1:5, filter and collect the filter residue, dry at 47°C for 7h, and prepare the bio-based polyester; In terms of parts, weigh 50 parts of polyethylene resin, 40 parts of bio-based polyester, 5 parts of compound antioxidant and 5 parts of polyethylene ter...

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
shrinkageaaaaaaaaaa
shrinkageaaaaaaaaaa
shrinkageaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a bio-based polyester-modified polyethylene shrink film, belonging to the technical field of shrink film preparation. The method comprises the following steps: stirring and mixing ethanedioic acid, succinic acid and ethylene glycol, heating in a water bath, dropwisely adding p-hydroxyanisole, heating, adding tetrabutyl titanate, vacuumizing, continuing heating to react, cooling by standing, mixing the reaction product with methanol, filtering, collecting the filter residue, drying to obtain bio-based polyester, mixing the bio-based polyester with a polyethylene resin and other substances, and carrying out banburying, extrusion granulation and the like. The polyethylene shrink film prepared by the method has bidirectional shrinkability, the longitudinal shrinkage is higher than 50%, and the transversal shrinkage is higher than 40%. The film shrinkage is 0.3-0.5 g / 10 minute, and thus, the film has favorable shrinkability.

Description

technical field [0001] The invention relates to a preparation method of a bio-based polyester modified polyethylene shrink film, belonging to the technical field of shrink film preparation. Background technique [0002] Shrink film is mainly used for sales and transportation of various products, and its main function is to stabilize, cover and protect products, so shrink film must have high puncture resistance, good shrinkage and shrinkage stress. The initial shrink film was mainly PVC. With the continuous improvement of the performance requirements of shrink film, PVC shrink film gradually decreased, while various polyethylene shrink films developed rapidly. Polyethylene shrink film is a kind of material with good toughness. It is widely used in the packaging of alcohol, cans, mineral water, various beverages, cloth and other products. The product has good flexibility, impact resistance, and Strong tear resistance, not easy to break, not afraid of moisture, large shrinkage...

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 Applications(China)
IPC IPC(8): C08L23/06C08L67/02C08K5/134C08K5/526C08G63/16
CPCC08L23/06C08G63/16C08J5/18C08J2323/06C08J2467/02C08L2203/16C08L2205/025C08L2205/03
Inventor 吴迪薛红娟高力群
Owner 吴迪
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com