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

Preparation method of polypropylene foaming sheet material through ultraviolet light radiation crosslinking

A technology of cross-linked polypropylene and foamed sheet, which is applied in the field of preparation of polypropylene foamed sheet and ultraviolet cross-linked polypropylene foamed sheet, can solve the problem of reducing the usability and mechanical properties of materials and failing to prepare foamed sheets. materials, difficult continuous production and other problems, to achieve the effect of low density, low price, good mechanical and thermal properties

Inactive Publication Date: 2014-10-22
BEIJING UNIV OF CHEM TECH
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, ordinary grades of polypropylene are semi-crystalline polymers, which soften significantly after reaching the melting temperature, have low melt strength, and cannot prepare qualified foaming materials.
[0004] At present, the existing irradiation technology mostly uses high-energy ray irradiation, such as X-rays and γ-rays, etc., but the energy of the rays is too high, and cross-linking and degradation occur simultaneously during the irradiation process, which is easy to cause damage to the material itself and reduce the material’s durability. Usability and mechanical properties, and the equipment is expensive, the maintenance cost is high, and it is difficult to realize continuous production

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
  • Preparation method of polypropylene foaming sheet material through ultraviolet light radiation crosslinking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: Weigh 100 parts of polypropylene, 0.2 parts of ultraviolet photoinitiator, 1.6 parts of sensitizer, 10 parts of toughening agent and 0.1 part of antioxidant in parts by mass, and mix them in a high-speed mixer for 10 to 15 minutes , The material temperature is controlled at about 80°C. Then, the homogeneously mixed material is blended, melted and extruded by a twin-screw extruder, and granulated. The extrusion temperature is about 230°C. Take 30 parts of foaming agent masterbatch and mix evenly with the pellets granulated by the twin-screw extruder, carry out non-foaming extrusion on the single-screw extruder, extrude a polypropylene foam sheet with a thickness of 1mm, extrude The outlet temperature was 160°C. The polypropylene foam sheet is subjected to 1000mj / cm in the ultraviolet box 2 of ultraviolet radiation. The sheet after ultraviolet irradiation was subjected to a foaming experiment in a foaming furnace, and the foaming temperature was 220°C.

Embodiment 2

[0027] Embodiment two: take by weight 100 parts of polypropylene, 0.2 parts of ultraviolet photoinitiator, 1.6 parts of sensitizer, 10 parts of toughening agent and 0.1 part of antioxidant, mix in high-speed mixer for 10 to 15 minutes , The material temperature is controlled at about 80°C. Then, the homogeneously mixed material is blended, melted and extruded by a twin-screw extruder, and granulated. The extrusion temperature is about 230°C. Take 30 parts of foaming agent masterbatch and mix evenly with the pellets granulated by the twin-screw extruder, carry out non-foaming extrusion on the single-screw extruder, extrude a polypropylene foam sheet with a thickness of 1mm, extrude The outlet temperature was 160°C. The polypropylene foam sheet is subjected to 3000mj / cm in a UV box 2 of ultraviolet radiation. The sheet after ultraviolet irradiation was subjected to a foaming experiment in a foaming furnace, and the foaming temperature was 220°C.

Embodiment 3

[0028] Embodiment three: Weigh 100 parts of polypropylene, 0.2 parts of ultraviolet photoinitiator, 1.6 parts of sensitizer, 10 parts of toughening agent and 0.1 part of antioxidant by mass parts, and mix in a high-speed mixer for 10 to 15 minutes , The material temperature is controlled at about 80°C. Then, the homogeneously mixed material is blended, melted and extruded by a twin-screw extruder, and granulated. The extrusion temperature is about 230°C. Take 30 parts of foaming agent masterbatch and mix evenly with the pellets granulated by the twin-screw extruder, carry out non-foaming extrusion on the single-screw extruder, extrude a polypropylene foam sheet with a thickness of 1mm, extrude The outlet temperature was 160°C. The polypropylene foam sheet is subjected to 5000mj / cm in the ultraviolet box 2 of ultraviolet radiation. The sheet after ultraviolet irradiation was subjected to a foaming experiment in a foaming furnace, and the foaming temperature was 220°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

No PUM Login to View More

Abstract

The invention relates to a polypropylene foaming sheet material preparation method utilizing an ultraviolet light radiation crosslinking technology. The method adopts ultraviolet light radiation to trigger polypropylene grafting and crosslinking so as to improve the melt strength of polypropylene, and can be applied to the development and production of a polypropylene sheet material with a high foaming ratio. The preparation method is characterized in that a special polypropylene foaming sheet material can be produced through an excellent blending technology and an energy-saving, controllable, and continuous ultraviolet light radiation technology, the obtained foaming material after a conventional chemical foaming technology has a uniform pore size, and the foaming ratio can reach 10 to 30 times. Furthermore, the energy consumption is low, the emission is zero, and the operation is simple during the production process; large-scale continuous production can be achieved, the technology controllability is high, and the product quality is stable.

Description

1. Technical field [0001] The invention relates to a polypropylene foam sheet, in particular to a preparation method of an ultraviolet cross-linked polypropylene foam sheet, and belongs to the field of polymer modification and processing. 2. Background technology [0002] Polypropylene foam material has excellent comprehensive performance and high cost performance: higher heat resistance and tensile strength than polyethylene foam material, higher impact strength than polystyrene foam material, and higher impact strength than polyurethane foam material Its environmental protection is gradually becoming the new darling of cushioning, packaging, interior decoration, catering and other industries. [0003] However, ordinary grades of polypropylene are semi-crystalline polymers, which soften significantly after reaching the melting temperature, have low melt strength, and cannot prepare qualified foaming materials. [0004] At present, the existing irradiation technology mostly...

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): B29C35/08C08L23/14C08J9/04
Inventor 苑会林王亮
Owner BEIJING UNIV OF CHEM TECH
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