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

Thermoplastic resin pellet, process for preparing thermoplastic resin pellets and expanded thermoplastic resin bead

A thermoplastic resin and a manufacturing method technology are applied in the fields of thermoplastic resin particles and their manufacture, and thermoplastic resin expanded particles, which can solve the difficulty of manufacturing resin particles, the inability of tow cutting method to manufacture tiny resin particles, and the ultra-light resin Particles, huge initial investment costs, etc.

Active Publication Date: 2005-08-03
JSP CORP
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, although the demand for fine resin particles and ultra-light resin particles has increased in recent years, there is a problem in the tow cutting method that a large amount of fine resin particles and ultra-light resin particles cannot be efficiently produced.
The UWC method is suitable for obtaining tiny resin particles, but the initial investment in equipment is huge, and there are also the following disadvantages: it is necessary to balance the extrusion speed of the rotary cutter knife and the extruder; it depends on the type of thermoplastic resin. Manufacture of resin particles becomes difficult, etc.

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
  • Thermoplastic resin pellet, process for preparing thermoplastic resin pellets and expanded thermoplastic resin bead
  • Thermoplastic resin pellet, process for preparing thermoplastic resin pellets and expanded thermoplastic resin bead
  • Thermoplastic resin pellet, process for preparing thermoplastic resin pellets and expanded thermoplastic resin bead

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7

[0080] (Manufacture of resin particles)

[0081] An extruder equipped with a die for forming only the number of circular holes shown in Table 1 at the outlet of the extruder equipped with the screw shown in Table 1, wherein the diameter of the circular holes is as shown in Table 1 was used. 100 parts by weight of propylene-ethylene random copolymer (ethylene component: 2.5% by weight, melting point: 143° C., MFR: 7 g / 10 minutes) and 0.05 parts by weight of zinc borate powder (foam regulator) were supplied to the extruder. It melt-kneaded at 230 degreeC in the extruder. Then, all the holes provided in the die were extruded under the extrusion conditions shown in Table 1 under the atmosphere to form a tow. Next, the tow is immediately introduced into a cooling bath adjusted to 20° C. in a tank with a length of 1 m, a width of 0.4 m, and a depth of 1 m (the cooling bath is accommodated to a tank height of 900 mm) to cool and solidify. , after blowing off the water adhering to t...

Embodiment 8

[0095] (Manufacture of resin particles)

[0096] An extrusion apparatus equipped with a die forming only the number of circular holes shown in Table 3, wherein the diameters of the circular holes are shown in Table 3, was used. To the extruder (screw diameter (barrel diameter): 6.5cm, screw length: 240cm), 100 wt. part and 0.05 part by weight of zinc borate powder (air bubble regulator) were melt-kneaded at 230° C. in the above-mentioned extruder. Then, all the holes provided in the die (shown in Table 3) were extruded under the extrusion conditions shown in Table 1 under the atmosphere to form tows. Next, each tow is immediately introduced into a cooling bath adjusted to 20° C. in a first tank with a length of 1 m, a width of 0.4 m, and a depth of 1 m (the cooling bath is accommodated until the height of the tank is 900 mm) to cool and solidify, and the tow is lifted from the cooling bath. , and then introduced into a washing bath adjusted to 15° C. in a second tank with a ...

Embodiment 9

[0102] 100 parts by weight of the same propylene-ethylene random copolymer as in Example 8, 0.05 parts by weight of zinc borate powder (air bubble regulator), and 1 part by weight of carbon black (coloring agent) were supplied to the extruder approximately the same as in Example 8. , brominated flame retardant (manufactured by Teijin Chemicals Co., Ltd., trade name: ファイヤガ-ド FG-3100) 3 parts by weight, antimony trioxide (flame retardant auxiliary agent) 1.5 parts by weight, in the above extruder at 220 ° C Melt kneading. Except for that, resin particles were produced substantially in the same manner as in Example 8. In addition, expanded particles were produced in substantially the same manner as in Example 8 using the obtained resin particles. In Example 8 and Example 9, there are differences as shown in Table 3 in terms of the number of holes, the ejection amount M per hole, and the amount of dry ice added. Table 3 shows the results. The obtained expanded particles were ju...

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

A process for preparing thermoplastic resin pellets, including extruding a melt of a thermoplastic resin into a gas phase through a die in the form of strands, immersing the strands in a bath containing water and a surfactant to cool the strands, taking the cooled strands out of the bath, and cutting the taken-out strands into pellets. A thermoplastic resin pellet is a cylindrical pellet obtainable by a process and having a diameter of D and a length of L, wherein the ratio L / D is greater than 1 but not greater than 5. An expanded thermoplastic resin bead is obtainable by foaming and expanding the thermoplastic resin pellet and has an apparent density of 10 to 600 g / L.

Description

technical field [0001] The present invention relates to a method for producing thermoplastic resin particles, thermoplastic resin particles produced by the method, and expanded thermoplastic resin particles obtained by expanding the thermoplastic resin particles. Background technique [0002] In-mold foam moldings using polystyrene-based resins, polyolefin-based resins, etc. as base resins have been known in the past, and these in-mold foam moldings have been used as fish boxes, etc. due to their excellent flexibility and impact resistance. Cushioning packaging materials for electric products, cushioning packaging materials for electrical products, energy absorbing materials for automobiles such as bumpers, and heat insulating materials. These in-mold foamed molded articles are generally produced by filling expanded particles in a mold of any shape, introducing steam or the like, and heating and fusing them. [0003] The expanded particles used in the above-mentioned in-mol...

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): C08J3/22B29B9/06B29C44/34B29C48/30C08J3/12C08J9/16C08J9/18
CPCC08J9/18B29B9/06B29C44/3461C08J2203/06B29K2105/048Y10T428/2982B29C48/0022B29C48/05B29C48/919B29C48/345B29K2021/003B29C48/022
Inventor 佐佐木秀浩平晃畅常盘知生
Owner JSP CORP
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