Foamed polypropylene bead containing beta crystal and preparation method thereof

A technology of foaming beads and polypropylene, which is applied in the field of foaming materials, can solve the problems of batch stability, unfavorable polypropylene foaming, and increasing the cost of resin raw materials, and achieve the effect of small crystal size and high crystal density
CN106589580AActive Publication Date: 2017-04-26广东炜林纳新材料科技股份有限公司
10 Cites 9 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
广东炜林纳新材料科技股份有限公司
Publication Date
2017-04-26

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a foamed polypropylene bead containing a beta crystal, belonging to the field of foamed materials. The foamed polypropylene bead containing the beta crystal comprises, by weight, 100 parts of polypropylene resin, 0.2 to 5 parts of beta nucleating agent master batch, 0.5 to 2 parts of an antistatic agent and 1 to 10 parts of a foaming nucleating agent. The invention also discloses a preparation method for the foamed polypropylene bead. According to the invention, a high-pressure fluid is used as a foaming agent; autoclave foaming technology is employed; double or multiple melting peaks including alpha and beta are formed through introduction of the beta crystal into a polypropylene particle, the foamed polypropylene bead and a foamed polypropylene bead preform material; the foamed polypropylene bead with a low foaming temperature and a high expansion ratio is prepared in virtue of the characteristics of low melting point / low crystallization temperature, small crystal size and high crystal density of the beta crystal; and the foamed polypropylene bead preform material containing the beta crystal has high tensile strength, increased by 15 to 50% compared with samples of a same kind under the condition of same density.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of foaming materials, and in particular relates to a polypropylene foaming bead containing β crystals and a preparation method thereof. Background technique

[0002] Polypropylene has the advantages of high mechanical strength, high service temperature, environmental protection, easy recycling, and high cost performance, so its application fields are increasing day by day, and its market share is increasing year by year. Polymer foaming is an important way to realize the lightweight of polypropylene, and has a wide range of application values ​​in the fields of automobiles, rail transit, and cushioning packaging.

[0003] The technology of preparing polypropylene sheets by chemical foaming and electronic cross-linking foaming is public, and the polypropylene resins used here are mostly high-melt strength polypropylene resins, and the required high-melt strength polypropylene resins are made by chemical Cross-linking,...

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