Biaxially oriented polypropylene film

A polypropylene film, biaxially oriented technology, used in synthetic resin layered products, chemical instruments and methods, layered products, etc., to achieve the effects of excellent film processability, strong orientation, and small molecular weight distribution

Pending Publication Date: 2018-11-23
TOYO TOYOBO CO LTD
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the film has room for improvement in heat resistance

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
  • Biaxially oriented polypropylene film
  • Biaxially oriented polypropylene film
  • Biaxially oriented polypropylene film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0194] What is used is to mix 99% by weight of polypropylene homopolymer PP-1 shown in Table 1 and 1% by weight of antistatic agent (diethanolamine stearate stearate (Matsumoto Yushi Co., Ltd. KYM-4K)) resulting mixture.

[0195] This mixture was melted at 250°C using a 60mm extruder, co-extruded into a sheet form from a T-die, cooled and solidified on a cooling roll at 30°C, and machined at 135°C in the longitudinal direction (MD ) stretched to 4.5 times. Next, in the tenter, both ends of the film in the width direction are clamped with clamps, preheated at 175°C, stretched to 8.2 times in the width direction (TD) at 160°C, and relaxed in the width direction (TD) 6.7%, while heat-fixing at 170°C. The film forming conditions at this time are shown in Table 2 as film forming conditions a.

[0196] For the one-side surface side of the obtained biaxially oriented polypropylene film, use a corona treatment machine manufactured by SOFTAL Corona & Plasma GmbH, and apply a current...

Embodiment 2

[0198] The polypropylene homopolymer PP-1 shown in Table 1 was changed to polypropylene resin PP-2, and the mixed raw materials were melted at 250°C using a 60mm extruder, and co-extruded into a sheet form from a T-die. After being cooled and solidified on a cooling roll at 30°C, it was stretched to 4.5 times in the machine direction (MD) at 125°C. Next, in the tenter, both ends of the film in the width direction are clamped with clamps, preheated at 170°C, stretched to 8.2 times in the width direction (TD) at 158°C, and relaxed in the width direction (TD) A biaxially stretched single-layer polypropylene film was obtained in the same manner as in Example 1 except that the content was 6.7% and heat-set at 165°C. The film forming conditions at this time are shown in Table 2 as film forming conditions b. The physical properties of the obtained film are shown in Table 3.

Embodiment 3

[0200] In the base material layer (A), what is used is that the polypropylene homopolymer PP-1 shown in Table 1 99% by weight and an antistatic agent (diethanolamine stearate stearate (Matsumoto Yushi Co., Ltd. KYM- 4K)) A mixed raw material obtained by mixing 1% by weight. In addition, in the surface layer (B), 99.7% by weight of the polypropylene homopolymer PP-1 shown in Table 1, an antiblocking agent (commercially available silica particles (average particle diameter: 1.3 μm) ) 0.3% by mass of the mixed raw material blended.

[0201] Using a 60mm extruder for the mixed raw material used for the base layer (A) and a 65mm extruder for the mixed raw material used for the surface layer (B), melt the raw material resin at 250°C and co-extrude from a T-die It is formed into a sheet, cooled and solidified on a cooling roll at 30°C, and then stretched to 4.5 times in the longitudinal direction (MD) at 135°C. Next, in the tenter, both ends of the film in the width direction are c...

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
The average particle sizeaaaaaaaaaa
Login to view more

Abstract

In order to provide a biaxially stretched polypropylene film having higher thermal resistance and rigidity, this biaxially oriented polypropylene film is characterized by: a polypropylene resin constituting the film fulfilling conditions 1)-4); and the lower limit of a plane orientation coefficient for the film being 0.0125. 1) The mesopentad fraction lower limit being 96%. 2) The upper limit forthe amount of copolymerized monomers other than propylene being 0.1 mol%. 3) Mass average molecular weight (Mw) / number average molecular weight (Mn) being 3.0-5.4. 4) The melt flow rate (MFR) measuredat 230 DEG C and 2.16 kgf being 6.2-9.0 g / 10 min.

Description

technical field [0001] This invention relates to biaxially stretched laminated polypropylene films. Specifically, it relates to a biaxially stretched polypropylene film excellent in heat resistance and mechanical properties. Background technique [0002] Conventionally, stretched films of polypropylene have been commonly used in a wide range of applications such as food, packaging of various products, electrical insulation, and surface protection films. However, conventional polypropylene films have a shrinkage rate of several tens of percent at 150°C. Compared with polyethylene terephthalate (PET) films, etc., they have low heat resistance and low rigidity. Therefore, the use is limited. [0003] Various techniques for improving the physical properties of polypropylene films have been proposed. For example, there is known a technique for obtaining rigidity by forming a film using polypropylene containing substantially equal amounts of high-molecular-weight components and...

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
IPC IPC(8): C08J5/18B32B27/32
CPCB32B27/32C08J5/18B29C55/12B32B27/08C08F10/06C08L23/12B32B2307/518C08F2500/12B32B2323/10C08J2323/12
Inventor 木下理山田浩司
Owner TOYO TOYOBO CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap