Waterproof and moisture permeable polyethylene film and preparation method thereof
A waterproof and moisture-permeable membrane and polyethylene technology, applied in the field of waterproof and moisture-permeable membrane materials, can solve the problems of pore size stability and poor waterproof performance, and achieve excellent hydrostatic pressure resistance, low production cost, and good moisture permeability. Effect
Inactive Publication Date: 2019-03-26
UNIV OF SCI & TECH OF CHINA
2 Cites 10 Cited by
AI-Extracted Technical Summary
Problems solved by technology
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 moreAbstract
The invention provides a waterproof and moisture permeable polyethylene film and a preparation method thereof. The method comprises the following steps: S1, mixing a polyethylene raw material and white oil, performing melt extrusion, casting and cooling to obtain a cast oil film, wherein the weight-average molecular weight of the polyethylene raw material is 600000-800000, and a mass ratio of thepolyethylene raw material to the white oil is 1:(1.5-2.5); S2, heating the cast oil film to 90-110 DEG C, performing asynchronous bidirectional stretching, and performing heat setting and cooling so as to obtain a bidirectional stretched oil film, wherein a longitudinal stretching ratio of bidirectional stretching is 3-5, and a transverse stretching ratio of bidirectional stretching is 5-8; and S3, performing ultrasonic extraction on the bidirectional stretched oil film, wherein the extraction agent used for ultrasonic extraction is normal hexane or dichloromethane; and drying the extracted film, thereby obtaining the waterproof and moisture permeable polyethylene film. The waterproof and moisture permeable polyethylene film disclosed by the invention has excellent waterproof property andexcellent moisture permeability, and can be applied to the fields of medical health work, protective clothing, building safety protecting and the like.
Technology Topic
Image
Examples
- Experimental program(4)
- Comparison scheme(1)
Example Embodiment
Example Embodiment
Example Embodiment
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
Property | Measurement | Unit |
Thickness | 5.0 ~ 50.0 | µm |
Water vapor transmission rate | 3600.0 ~ 4500.0 | g/m2·24h |
Pore size distribution | 15.0 ~ 30.0 | nm |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
Description & Claims & Application Information
We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
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 Similar technology patents
Battery diaphragm and application thereof
InactiveCN104600230AHigh porosityReduced ionic conductivitySecondary cellsCell component detailsCeramic particleLithium electrode
Owner:SHENZHEN ZHONGXING NEW MATERIAL TECH CO LTD
Labyrinth type current-crossing and bubbling photocatalytic reaction device and method for treating organic waste water thereby
InactiveCN1864843AFully contactedHigh porosityWater/sewage treatment by irradiationEnergy based wastewater treatmentContact timeLight source
Owner:TAIYUAN UNIV OF TECH
Soil passivating agent suitable for northern sewage irrigation area farmland and application method of soil passivating agent
InactiveCN107350281ALarge specific surface areaHigh porosityContaminated soil reclamationOrganic fertilisersIonIon exchange
Owner:CHINESE RES ACAD OF ENVIRONMENTAL SCI
Ceramic porous substrate, reinforced composite electrolyte membrane using the same and membrane-electrode assembly having the same
ActiveUS20120077109A1High porosityGood dimensional stabilityCell electrodesSynthetic resin layered productsPolymer substrateInorganic nanoparticles
Owner:KOREA RES INST OF CHEM TECH
Wet-type copper based powder metallurgy friction wafer and manufacturing method
ActiveCN101178102AImprove process efficiencyHigh porosityFriction liningPowder metallurgyPressureless sintering
Owner:HANGZHOU ADVANCE GEARBOX GRP
Classification and recommendation of technical efficacy words
- High porosity
Composite self-cohered web materials
InactiveUS20070026039A1High porositySuitable for useAntipyreticAnalgesicsBiomedical engineeringPorosity
Owner:WL GORE & ASSOC INC
Metal Encapsulated Dendritic Carbon Nanostructure, Carbon Nanostructure, Process for Producing Metal Encapsulated Dendritic Carbon Nanostructure, Process for Producing Carbon Nanostructure, and Capacitor
ActiveUS20110058308A1High porosityImprove conductivityMaterial nanotechnologyLiquid electrolytic capacitorsNanometreMetal
Owner:NIPPON STEEL CHEMICAL CO LTD +1
Container for the cultivation of plants
InactiveUS7171783B1Efficient retentionHigh porositySelf-acting watering devicesWatering devicesIrrigationEngineering
Owner:FIDOTTI GIAMPIERO
Oil-absorbing polyurethane foam material
Owner:中国人民解放军63975部队 +1
Degradable and absorbable polymer nano fibrous membrane materials and preparation process and use thereof
InactiveCN1837274AGood uniformityHigh porositySurgeryFilament/thread formingFilm materialDecomposition
Owner:INST OF CHEM CHINESE ACAD OF SCI