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

Raw material composition for preparing blown breathable film, blown breathable film and preparation of blown breathable film

A raw material composition and a technology for a breathable film, applied in the field of medical products, can solve the problems of high temperature cross-linking of raw materials, incomplete formulation of the breathable film, and low yield, etc., and achieve the effect of good extrusion processing performance.

Active Publication Date: 2019-06-21
RENOLIT PLASTICS TECH BEIJING CO LTD
View PDF7 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the former includes: the raw materials of the breathable film are mixed, and then stretched at a certain temperature by extrusion, granulation, and casting into sheets, as shown in Chinese patent CN104558795A, which discloses a casting method to prepare poly The method of olefin gas permeable membrane, the method obtains the gas permeable membrane with high moisture permeability by controlling the particle size of the inorganic filler; however, the gas permeable membrane prepared by casting method has the disadvantages of hydrostatic pressure resistance and insufficient physical strength, It will cause liquid leakage during use. Many manufacturers increase the thickness of the breathable membrane or increase the weight of the membrane in order to improve the hydrostatic pressure resistance of the breathable membrane. It began to be promoted in China in 2010, because of the particularity of the raw materials used, it can achieve higher stretching ratio, lower gram weight (weight per square meter of film), higher water vapor transmission rate, and larger width. Wide, and then can reduce the cost of raw materials while improving the performance of the breathable film, specifically as shown in Chinese patent CN107674283A, which discloses a method for preparing a breathable film by blown film method, which makes the breathable film lighter and thinner by biaxial stretching process , to improve the air permeability of the breathable membrane
However, the formula of the blown film method breathable film currently on the market is not perfect, mainly reflected in the low water permeability and low longitudinal tensile strength.
From the point of view of raw material production process, the main problems of raw material production at present are low yield, high pressure of extrusion head, high melt temperature, easy to cause wear of melt pump and high temperature crosslinking of raw materials

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
  • Raw material composition for preparing blown breathable film, blown breathable film and preparation of blown breathable film
  • Raw material composition for preparing blown breathable film, blown breathable film and preparation of blown breathable film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] This embodiment provides a blown film breathable film, wherein the blown film breathable film is prepared by the following method:

[0066] (1) using a twin-screw kneading extruder to uniformly knead the raw material composition for preparing the blown film breathable film;

[0067] Based on 100% of the total weight of the raw material composition for preparing a blown film breathable film, it comprises 55% calcium carbonate powder coated with a coupling agent stearic acid, 9.1% linear low density polyethylene #1 , its density is 0.927g / cm 3 , the melt index at 190°C is 1.0g / 10min, 14.6% linear low density polyethylene #2, its density is 0.920g / cm 3 , the melt index at 190°C is 1.0g / 10min, 20% linear low density polyethylene #3, its density is 0.918g / cm 3 , the melt index distribution at 190℃ is 2.0g / 10min; 0.15% of the main antioxidant IRGANOX 1010, 0.15% of the auxiliary antioxidant IRGAFOS 168 and 1% of PPA;

[0068] The length-diameter ratio of the twin-screw mix...

Embodiment 2

[0079] This embodiment provides a blown film breathable film, wherein the blown film breathable film is prepared by the following method:

[0080] (1) using a twin-screw kneading extruder to uniformly knead the raw material composition for preparing the blown film breathable film;

[0081] Based on 100% of the total weight of the raw material composition for preparing a blown film breathable film, it comprises 55% calcium carbonate powder coated with a coupling agent stearic acid, 29.1% linear low density polyethylene #1 , its density is 0.927g / cm 3 , the melt index at 190°C is 1.0g / 10min, 14.6% linear low density polyethylene #2, its density is 0.920g / cm 3 , the melting index at 190 ℃ is 1.0g / 10min; 0.4% of the main antioxidant IRGANOX 1010, 0.4% of the auxiliary antioxidant IRGAFOS 168 and 1.5% of PPA;

[0082] The length-diameter ratio of the twin-screw mixing extruder is 56, the number of barrel sections is 14, and the screw diameter is 75 mm. The twin-screw mixing extru...

Embodiment 3

[0093] This embodiment provides a blown film breathable film, wherein the blown film breathable film is prepared by the following method:

[0094] (1) using a twin-screw kneading extruder to uniformly knead the raw material composition for preparing the blown film breathable film;

[0095] Based on 100% of the total weight of the raw material composition for preparing a blown film breathable film, it comprises 50% calcium carbonate powder coated with a coupling agent stearic acid, 48.7% linear low density polyethylene #4 , its density is 0.920g / cm 3 , the melting index at 190 ℃ is 1.0g / 10min; 0.1% of the main antioxidant IRGANOX 1010, 0.1% of the auxiliary antioxidant IRGAFOS168 and 1.1% of PPA;

[0096] The length-diameter ratio of the twin-screw mixing extruder is 56, the number of barrel sections is 14, and the screw diameter is 75 mm. The twin-screw mixing extruder is provided with a main feeding port and a first side feeding system, The second side feeding system; the f...

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
densityaaaaaaaaaa
thicknessaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a raw material composition for preparing a blown breathable film, a blown breathable film and preparation of the blown breathable film. The raw material composition comprises the following ingredients in percentage by weight (100% in total): 50-70% of inorganic filler coated with a coupling agent on the surface, 25-50% of linear low density polyethylene and 0.2-1.0% of antioxidant, wherein linear low density polyethylene comprises 1-3 kinds of linear low density polyethylene in different densities; density distribution of linear low density polyethylene in the differentdensities is 0.910-0.935g / cm<3>; and melting index distribution at 190 DEG C is 2.5-0.5g / 10min. The invention further provides a masterbatch of the blown breathable film, which is prepared from the raw material composition. The invention further provides a blown breathable film which is prepared by blowing the masterbatch to form a film by a film blowing method and then performing unilateral stretching on the film. The blown breathable film is excellent in comprehensive performance and lower in cost.

Description

technical field [0001] The invention relates to a raw material composition for preparing a blown film breathable film, a blown film breathable film and the preparation thereof, belonging to the technical field of medical products. Background technique [0002] With the improvement of people's living standards, the liberalization of China's two-child policy, and the aging of China's population, the popularity and consumption of disposable sanitary products including sanitary napkins, baby diapers, and adult diapers have increased significantly; microporous waterproof The breathable film is the base film for preparing the above-mentioned products, which is used to achieve the effect of waterproof and breathable. With a thickness of 0.1-5 μm, these micropores can allow water vapor and air to pass through, and at the same time can effectively block the penetration of liquids such as water; air permeability is the main functional indicator of paper diapers. [0003] At present, ...

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): C08L23/08C08K9/10C08K5/09C08K3/26C08K5/134C08K5/526C08J5/18
Inventor 朱向阳张文芳郑凯敬马懿
Owner RENOLIT PLASTICS TECH BEIJING CO LTD
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