Polypropylene series resin composite foam particle, and preparation method and application thereof

A polypropylene resin and composite foaming technology, applied in the field of foaming materials, can solve the problems of high molding pressure, high production cost, long molding cycle, etc., and achieve the effects of shortened molding cycle, simple preparation method and easy operation.

Active Publication Date: 2015-10-21
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems of high molding pressure, high production cost and long molding cycle of polypropylene composite foamed particles in the prior art, and provide a polypropylene resin composite foamed particle and its preparation method and application

Method used

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  • Polypropylene series resin composite foam particle, and preparation method and application thereof
  • Polypropylene series resin composite foam particle, and preparation method and application thereof
  • Polypropylene series resin composite foam particle, and preparation method and application thereof

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preparation example Construction

[0032] The preparation method of the above-mentioned polypropylene-based resin composite foamed particles comprises the following steps:

[0033] Step 1. After mixing the matrix resin and the inorganic release agent evenly, add them to the extruder, melt and co-extrude them linearly, cool, and pelletize to obtain blended resin particles;

[0034] Wherein, there is no restriction on the mixing method of the matrix resin and the inorganic release agent, as long as the mixture is uniform, such as solution mixing or in-situ mixing; when the blended resin particles also contain additives, the additive, matrix resin and inorganic release agent Mix together, or replace the matrix resin with the matrix resin modified by additives, and keep other operations unchanged;

[0035] The extruder can be a twin-screw extruder or a single-screw extruder, and the extrusion temperature can be above the melting point of the matrix resin;

[0036]Step 2. Add the blended resin particles, foaming ag...

Embodiment 1-15

[0041] Preparation of polypropylene-based resin composite foam particles:

[0042] Step 1. According to the composition and proportion of Table 1 and Table 2, add 100 parts by weight of matrix resin and inorganic release agent to the extruder, melt extrude, cool, and pelletize to obtain a diameter of 1mm and a length of 1.8mm. , with an average weight of 1.8 mg blended resin particles;

[0043] Step 2, in the autoclave of 5L, add 100 weight parts (1000g) above-mentioned blended resin particle, 300 weight parts water, 0.05 weight part sodium dodecylbenzene sulfonate, 0.3 weight part kaolin and carbon dioxide (charged carbon dioxide Ensure that the pressure in the autoclave at the foaming temperature is 6MPa), heat up to a temperature 5°C lower than the foaming temperature of the corresponding Table 1 and Table 2 while stirring, keep the temperature for 15min, and then use the values ​​in Table 1 and Table 2 respectively Foaming temperature and foaming time, make the foaming ag...

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Abstract

The invention discloses a polypropylene series resin composite foam particle, and a preparation method and an application thereof, and belongs to the technical filed of foam materials. Technical problems of high molding pressure in a polypropylene series resin composite foam particle die, high preparation cost and long molding cycle in the prior art are solved. The foam particle is prepared through a dispersion medium release technology of blended resin particles, the cell diameters of the foam particle sequentially increase from inside to outside, and the average cell diameter Rs of a skin layer and the average cell diameter R0 of a core layer meet the following relationship: Rs/R0 is not smaller than 1 and not greater than 5; and the blended resin particles contain matrix resin and an inorganic separant, the mass fraction of the inorganic separant is 1-20%, the matrix resin is polypropylene series resin, and the inorganic separant is a layered inorganic substance. When the foam particle is used to prepare a foam body, the steam consumption is greatly reduced, the forming cycle is shortened, and the preparation cost is reduced; and the foam body obtained in the invention has smooth surface and excellent compliance.

Description

technical field [0001] The invention belongs to the technical field of foaming materials, and in particular relates to a polypropylene-based resin composite foaming particle and a preparation method and application thereof. Background technique [0002] The expanded particle molded body made of polypropylene resin has been widely used in the automotive field and electronic product packaging field in recent years due to its good shock absorption ability and heat resistance. But, the melting point of polypropylene resin is relatively high, in order to form polypropylene resin expanded particle in mold, need the water vapor pressure of at least 0.4Mpa, the water vapor amount of 10-40kg. As environmental protection requirements become higher and higher, the use of coal-fired boilers is subject to more and more restrictions, and the consumption of water vapor also results in higher and higher production costs for foamed particle moldings made of polypropylene resins. In addition,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/16C08J9/14C08J9/12C08L23/12C08K7/00C08K3/34C08K3/04
Inventor 唐涛邢海平邱健姜治伟谭海英
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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