Polyamide resin composition for molded article to be in contact with high-pressure hydrogen, and molded article obtained therefrom

A technology of polyamide resin and composition, which is applied to the field of polyamide resin composition and molded products formed by molding the same, can solve the problems of reduced strength and toughness, poor adhesion, poor appearance, etc., and achieves excellent welding characteristics, The effect of less defect points and fast crystallization speed

Active Publication Date: 2016-12-21
TORAY IND INC
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

V-shaped grooves called weld lines (weld lines) are formed at the welding part due to poor adhesion, which may cause poor appearance
In addition, strength and toughness may decrease due to stress concentration (notch effect)

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
  • Polyamide resin composition for molded article to be in contact with high-pressure hydrogen, and molded article obtained therefrom
  • Polyamide resin composition for molded article to be in contact with high-pressure hydrogen, and molded article obtained therefrom
  • Polyamide resin composition for molded article to be in contact with high-pressure hydrogen, and molded article obtained therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～9、 comparative example 1～12

[0113] Each raw material described in Table 1 and Table 2 was supplied to a twin-screw extruder (JSW) whose barrel temperature was set at 240° C., the screw configuration was provided with one kneading zone, and the screw rotation speed was 150 rpm. TEX30α-35BW-7V manufactured by the company) (L / D=45 (in addition, L here is the length from the raw material supply port to the discharge port)) was melt-kneaded. Let the gut (gut) discharged from the die at a speed of 20 kg / h pass through a cooling bath filled with water whose temperature has been adjusted to 10° C. for 10 seconds, thereby performing rapid cooling, and then use a wire cutter Granulation is performed to obtain granules. The obtained granules were vacuum-dried at a temperature of 80° C. for 12 hours using a vacuum dryer, and the dried granules were used for evaluation by the above-mentioned method. The results are shown in Tables 1 and 2. In addition, the measurement results of the rise time of the invariant Q in t...

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
melting pointaaaaaaaaaa
particle sizeaaaaaaaaaa
melting pointaaaaaaaaaa
Login to view more

Abstract

A polyamide resin composition for molded articles to be in contact with high-pressure hydrogen, the polyamide resin composition comprising a blend of a polyamide-6 resin (A) and a polyamide resin (B) which has a melting point, as determined by DSC, that is not higher than the temperature which is higher by 20oC than the melting point of the polyamide-6 resin (A) and which has a crystallization temperature during cooling, as determined by DSC, that is higher than the crystallization temperature during cooling of the polyamide-6 resin (A), the amount of the polyamide resin (B) being 0.01-5 parts by weight per 100 parts by weight of the polyamide-6 resin (A). The polyamide resin composition can give a molded article which, even when high-pressure hydrogen charging and pressure release are repeated, is inhibited from developing flaws and which has excellent weld properties.

Description

technical field [0001] The present invention relates to a polyamide resin composition for molded articles contacting with high-pressure hydrogen and molded articles thereof. In the polyamide resin composition, a specific amount of a specific polyamide is blended into a polyamide 6 resin. Amide resin. Background technique [0002] In recent years, in response to the depletion of petroleum fuels and the need to reduce harmful gas emissions, automobiles are equipped with fuel cells that electrochemically react hydrogen and oxygen in the air to generate electricity, and the power generated by the fuel cells is supplied to Fuel cell electric vehicles, which generate driving force through electric motors, are gradually attracting attention. As a high-pressure hydrogen tank to be installed in an automobile, a resin tank in which the outer side of a resin liner is reinforced with a carbon fiber-reinforced resin has been studied. However, since the molecular size of hydrogen is sma...

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): C08L77/02C08L23/26C08L77/06F17C1/16
CPCC08L77/06C08L77/02C08L2205/025Y02E60/32C08L51/06C08L23/0876B32B1/02B32B27/08B32B27/34C08L23/26F17C1/16F17C13/04F17C2203/0604F17C2203/0675F17C2203/066B32B2439/00C08J5/00C08J2377/02C08J2477/06F17C2205/0323F17C2221/012F17C2270/0184C08L23/0815
Inventor 佐藤大辅落合伸一郎小林定之
Owner TORAY IND INC
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