Polypropylene nucleating and cooling bifunctional master batch and preparation method and application thereof

A dual-function, polypropylene technology, applied in the field of melt blown, to achieve the effect of promoting dispersion, promoting refinement, and achieving uniform degradation

Active Publication Date: 2020-08-07
星贝达新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, with the maturity of melt blown processing, higher requirements are put forward for the mechanical properties, heat resistance, aging resistance and gloss of melt blown materials, so additives such as nucleating agents will be added in melt blown processing , but general nucleating agents may have problems such as heat resistance and dispersibility, so the preparation of dual-functional masterbatches with cooling and nucleation is the focus of current research

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  • Polypropylene nucleating and cooling bifunctional master batch and preparation method and application thereof

Examples

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preparation example Construction

[0060] Further preferably, the preparation method of the foam carrier of the present invention comprises the following steps:

[0061] After heating the polyolefin and the nucleating agent to 150-160°C and mixing, inject the foaming agent at a pressure of 15-20 MPa, mix, and extrude from the mouth film, the pressure of the mouth film drops to 15-20 MPa, and the foam is obtained. Foam carrier; the porosity of the foam carrier is 70-80%

[0062] The pressure of the orifice will be the pressure that drops as the premix passes through the orifice.

[0063] The cells in the foamed material include open cells and closed cells. Open cells are cells whose walls are not completely closed and are directly or indirectly connected to other cells. Closed cells are closed cells that are not the same as other cells. The open porosity rate is the volume percentage of open pores, which can be obtained by testing methods well known in the art, such as ASTM D2856-94.

[0064] The applicant fou...

Embodiment 1

[0096] This example provides a kind of bifunctional masterbatch, the preparation raw material of described bifunctional masterbatch includes foaming carrier, nucleating agent and peroxide; The weight percentage of described nucleating agent accounting for bifunctional masterbatch is 1.25wt%; The peroxide accounts for 10wt% by weight of the bifunctional masterbatch; the raw materials for the preparation of the foam carrier include polyolefins and carbon dioxide, and the polyolefins include styrene-ethylene-butylene-styrene copolymers and polyolefins. Propylene, the weight ratio is 0.2:1, the weight percentage of the carbon dioxide in the polyolefin is 8wt%; the preparation method of the foam carrier includes the following steps: melt mixing: heat the polyolefin and the nucleating agent to 160°C and mix , inject carbon dioxide at a pressure of 15 MPa, mix, and extrude from the mouth film, the pressure drop of the mouth film is 15 MPa, to obtain a foamed carrier.

[0097] The pol...

Embodiment 2

[0106] This example provides a kind of bifunctional masterbatch, the preparation raw material of described bifunctional masterbatch includes foaming carrier, nucleating agent and peroxide; The weight percentage of described nucleating agent accounting for bifunctional masterbatch is 1.25wt%; The peroxide accounts for 10wt% by weight of the bifunctional masterbatch; the raw materials for the preparation of the foam carrier include polyolefins and carbon dioxide, and the polyolefins include styrene-ethylene-butylene-styrene copolymers and polyolefins. Propylene, the weight ratio is 0.3:1, the weight percentage of the carbon dioxide in the polyolefin is 10wt%; the preparation method of the foam carrier includes the following steps: melt mixing: heat the polyolefin and the nucleating agent to 150°C and mix , inject carbon dioxide at a pressure of 20 MPa, mix, and extrude from the mouth film, the pressure drop of the mouth film is 20 MPa, to obtain a foamed carrier.

[0107] The po...

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Abstract

The invention relates to the technical field of melt-blowing, in particular to a polypropylene nucleating and cooling bifunctional master batch and a preparation method and application thereof. According to the polypropylene nucleating and cooling bifunctional master batch, the prepared difunctional master batch with the stable cell and the aperture ratio can effectively absorb peroxide, the peroxide is uniformly dispersed in the bifunctional master batch, the dispersion of peroxide and the nucleating agent can be promoted when a melt-blown material is prepared to achieve uniform degradation,excessive degradation and other phenomena are avoided, the melt-blown material with the high melt flow rate is obtained, refining of melt-blown material grains by nucleating agents and the like can bepromoted, the melt-blown material with high transparency is obtained, non-woven fabric and the like can be prepared, and therefore the melt-blown material can be used for the fields of filtering, absorbing, keeping warm, absorbing oil and the like, such as mask preparation.

Description

technical field [0001] The invention relates to the field of melt-blown technology, more specifically, the invention relates to a polypropylene nucleating and cooling dual-functional masterbatch and its preparation method and application. Background technique [0002] Melt blowing (melt-blowing) process is to spray the melt extruded by the screw with high-speed and high-temperature airflow, so that the melt stream is stretched at a higher ratio to form ultra-fine short fibers, and then piled up on the condensation net curtain or into a On the web drum, a continuous short fiber web is formed, and then a nonwoven fabric is made by self-bonding or other reinforcement processes. Therefore, it is necessary for the melt blown masterbatch to have stable high fluidity (not very high melt index), narrow molecular weight distribution, low ash content, no other product residues, excellent spinning performance and other properties. [0003] Among them, in order to obtain a high-fluidit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L53/02C08K5/14C08K5/527C08J9/12C08J3/22
CPCC08J9/122C08J9/0061C08J9/0023C08J9/0038C08J3/226C08J2323/12C08J2423/12C08J2453/02C08K5/14C08K5/527C08J2203/06
Inventor 张乃斌
Owner 星贝达新材料有限公司
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