A kind of low shrinkage, high rebound epe beads and preparation method thereof

A high-rebound, low-shrinkage technology, applied in the field of low-shrinkage, high-rebound EPE beads and their preparation, can solve the problems of inability to meet dimensional accuracy requirements, high shrinkage of EPE beads, large surface gloss and other problems , to achieve excellent mechanical properties, good surface gloss, and good dimensional stability

Active Publication Date: 2017-08-04
WUXI HI TEC ENVIRONMENTAL MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the defects of existing EPE beads with high shrinkage rate, poor product dimensional stability, large shrinkage rate and surface gloss, etc., which cannot complete parts with high dimensional accuracy requirements and complex shapes. Provide a kind of low shrinkage, high resilience EPE beads and preparation method thereof

Method used

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  • A kind of low shrinkage, high rebound epe beads and preparation method thereof

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Effect test

Embodiment 1

[0036] A low shrinkage, high resilience EPE beads with a density of 15g / L. The formulation of the EPE beads includes the following components by weight:

[0037] 70 parts of non-metallocene catalyzed LLDPE resin, 20 parts of HDPE resin, 2 parts of antistatic agent and 8 parts of auxiliary agent;

[0038] Wherein, the MFR of the non-metallocene-catalyzed LLDPE resin is 1g / 10min, and the MFR of the HDPE resin is 2g / 10min;

[0039] The auxiliary agent is glycerin and polyethylene glycol.

[0040] The preparation method of the low shrinkage EPE beads adopts the following steps:

[0041] 1) First, mix and stir the non-metallocene-catalyzed LLDPE resin, HDPE resin, antistatic agent, and auxiliary agents according to the ratio;

[0042] 2). The above-mentioned mixed materials are subjected to extruder drawing and pelletizing to obtain polyethylene resin particles suitable for foaming; the diameter of the obtained polyethylene resin particles is 0.5mm;

[0043] 3) Disperse polyethylene resin par...

Embodiment 2

[0046] A kind of low shrinkage and high resilience EPE beads with a density of 100g / L, including the following components by weight:

[0047] 93.5 parts of non-metallocene catalyzed LLDPE resin, 5 parts of HDPE resin, 0.5 part of antistatic agent and 1 part of auxiliary agent;

[0048] Wherein, the MFR of the non-metallocene catalyzed LLDPE resin is 3g / 10min, and the MFR of the HDPE resin is 5g / 10min;

[0049] The auxiliary agent is polypropylene glycol neutralized palmitamide.

[0050] The preparation method of the low shrinkage EPE beads adopts the following steps:

[0051] 1) First, mix and stir the non-metallocene-catalyzed LLDPE resin, HDPE resin, antistatic agent, and auxiliary agents according to the ratio;

[0052] 2) The above-mentioned mixed material is subjected to extruder drawing and pelletizing to obtain polyethylene resin particles suitable for foaming; the diameter of the obtained polyethylene resin particles is 6mm;

[0053] 3) Disperse polyethylene resin particles in an ...

Embodiment 3

[0056] A kind of low shrinkage, high resilience EPE beads with a density of 80g / L. The formulation of the EPE beads includes the following components by weight:

[0057] 67 parts of non-metallocene catalyzed LLDPE resin, 20 parts of HDPE resin, 3 parts of antistatic agent and 10 parts of fatty acid glyceride;

[0058] Wherein the MFR of the non-metallocene catalyzed LLDPE resin is 2g / 10min, and the MFR of the HDPE resin is 3.5g / 10min;

[0059] The preparation method of the low shrinkage EPE beads adopts the following steps:

[0060] 1) First, mix and stir the non-metallocene-catalyzed LLDPE resin, HDPE resin, antistatic agent, and auxiliary agents according to the ratio;

[0061] 2) The above-mentioned mixed materials are subjected to extruder drawing and pelletizing to obtain polyethylene resin particles suitable for foaming; the diameter of the obtained polyethylene resin particles is 3mm;

[0062] 3) Disperse polyethylene resin particles in an aqueous dispersion medium, put them into...

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Abstract

The invention discloses a low-shrinkage high-resilience EPE beads. The non-metallocene catalyzed LLDPE resin is adopted as the main base material so enable the EPE beads to have relatively high porosity by closed pore, and HDPE is used as an auxiliary material to enable the EPE beads to have rigidity and resilience after foaming; no anti-shrinkage agent needs to be added, and the porosity by closed pore of the EPE beads is as high as 95% or above, the shrinkage rate is as low as 2-3%, the foaming aperture is 200-300 micrometers, the surface glossiness is good, the light transmittance is high, the mechanical property is excellent, and the surface adhesive power is high; in addition, as inorganic gas in a supercritical state is used as a foaming agent, no heat preservation device is required after foaming, all needed is to feed steam of 0.3-3 KPa into the conveying pipeline of polyethylene resin particles, the continuous increase in foam pores of the polyethylene resin particles is completed through the fact that steam stays in the conveying pipeline for 30-120s; the production efficiency is high, and the energy consumption is low.

Description

Technical field [0001] The invention relates to the field of polyethylene resin foamed particles, in particular to a low-shrinkage, high-resilience EPE bead and a preparation method thereof. Background technique [0002] Polyethylene foam, the commercially available products are mainly beads and sheets. The sheet is also called EPE pearl cotton. It is a new environmentally friendly material with high-strength cushioning and excellent shock absorption and shock resistance. It is non-toxic, odorless, soundproof and sound-absorbing. , No pollution to the atmosphere during heat insulation and incineration, good resilience, softness and thickness can be adjusted at will, light weight, etc., suitable for sports protective gear, handbags, automotive, aerospace, construction, shoe materials, toys, Air conditioning, oil pipeline insulation, etc. [0003] The processed product of EPE pearl cotton has good plasticity, flexibility, elastic recovery and other characteristics. However, the exi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L23/06C08L71/02C08K5/053C08K5/103C08J9/16C08J9/12C08J9/08
CPCC08J9/08C08J9/122C08J9/125C08J9/16C08J2203/02C08J2203/06C08J2203/10C08J2205/052C08J2323/08C08J2423/06C08K2201/017C08L23/0815C08L2203/14C08L2205/03C08L2207/062C08L23/06C08L71/02C08K5/053C08K5/103
Inventor 曾佳刘缓缓孙石磊王远威李殿龙朱民
Owner WUXI HI TEC ENVIRONMENTAL MATERIAL CO LTD
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