Preparation method of lightweight polypropylene foam material

A foaming material, polypropylene technology, applied in the field of polypropylene materials, can solve the problems such as the foaming effect needs to be improved, and achieve the effects of reducing apparent defects, good foaming effect, and large specific area

Pending Publication Date: 2020-11-20
苏州润佳高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the foaming effect of the current foam

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of lightweight polypropylene foam material, comprising the following steps:

[0022] (1) Take 15 parts by mass of sodium bicarbonate, 35 parts by mass of citric acid and 5 parts by mass of microcapsule xylitol and mix them into a granulator, then spray 15 parts by mass of water into the granulator to granulate; The particles were immersed in 100 parts by mass of silicone oil, ultrasonicated and stirred for 5 min; then vacuum filtered and vacuum dried to obtain a silicone-coated composite foaming agent.

[0023] This step can better mix the phase change material and the foaming agent together, and after coating, the compatibility of the composite foaming agent and the polypropylene material is better.

[0024] (2) Weigh 100 parts by mass of polypropylene resin, 16 parts by mass of mica microflakes, 15 parts by mass of talcum powder, 5 parts by mass of styrene thermoplastic elastomer, 5 parts by mass of compatibilizer, 1 part by mass of antistatic age...

Embodiment 2

[0033] A preparation method of lightweight polypropylene foam material, comprising the following steps:

[0034] (1) Take 12 parts by mass of sodium bicarbonate, 28 parts by mass of citric acid and 8 parts by mass of microcapsule xylitol and mix them into the granulator, then spray 24 parts by mass of water into the granulator to granulate; The particles were immersed in 100 parts by mass of silicone oil, ultrasonicated and stirred for 5 min; then vacuum filtered and vacuum dried to obtain a silicone-coated composite foaming agent.

[0035] (2) Weigh 100 parts by mass of polypropylene resin, 20 parts by mass of mica microflakes, 10 parts by mass of talcum powder, 12 parts by mass of styrene thermoplastic elastomer, 8 parts by mass of compatibilizer, 0.5 parts by mass of antistatic agent and antistatic agent. 1 part by mass of oxidizing agent; then dry mix for 2 hours.

[0036] (3) Send the mixture obtained in step (2) into a twin-screw extruder to melt, extrude, cool, and gra...

Embodiment 3

[0041] A preparation method of lightweight polypropylene foam material, comprising the following steps:

[0042] (1) Take 21 parts by mass of sodium bicarbonate, 42 parts by mass of citric acid and 4 parts by mass of microcapsule xylitol and mix them into the granulator, then spray 30 parts by mass of water into the granulator to granulate; The particles were immersed in 100 parts by mass of silicone oil, ultrasonically and stirred for 10 min; then vacuum filtered and vacuum dried to obtain a silicone-coated composite foaming agent.

[0043] (2) Weigh 100 parts by mass of polypropylene resin, 10 parts by mass of mica microchips, 20 parts by mass of talcum powder, 2 parts by mass of styrene-based thermoplastic elastomer, 2 parts by mass of compatibilizer, 2 parts by mass of antistatic agent and antistatic agent. 0.5 parts by mass of oxidizing agent; then dry-mix for 3 hours.

[0044] (3) Send the mixture obtained in step (2) into a twin-screw extruder to melt, extrude, cool, a...

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Abstract

The invention relates to a preparation method of a lightweight polypropylene foam material. The preparation method comprises the following steps: preparing a composite foaming agent from sodium bicarbonate, citric acid and microcapsule xylitol; preparing polypropylene composite master batch from polypropylene resin, mica microchips and auxiliaries; and mixing the composite foaming agent, the polypropylene composite master batch and dicumyl peroxide to obtain a finished product. According to the invention, mica microchips are introduced in the preparation process of the polypropylene compositemaster batch; the substance has a large comparison area, so that the polypropylene and mica microchip interface has more points for bubble nucleation, thereby being beneficial to foaming; meanwhile, the mica microchips form a layer-by-layer staggered and overlapped arrangement state in the polypropylene base material, so that not only can the mechanical property of the base material be improved, but also the foaming effect is improved, and the apparent defects caused by gas overflow are reduced.

Description

technical field [0001] The invention relates to the field of polypropylene materials, in particular to a preparation method of a lightweight polypropylene foam material. Background technique [0002] Polypropylene material is a material with high cost performance; therefore, its application in automotive plastic parts has been continuously expanded, and it has been widely used in bumpers, automotive dashboards, door panels, and central passages , decorative pillars, trunks and other major automotive plastic parts. [0003] The foamed polypropylene material is characterized by the polypropylene material as the matrix, the middle layer of the material is densely covered with closed micropores with a size ranging from ten to tens of microns, and there are dense skin structures on both sides. In recent years, due to the pursuit of lightweight, high-efficiency and low-cost production, expanded polypropylene materials have attracted more and more attention. But the foaming effec...

Claims

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Application Information

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IPC IPC(8): C08J9/08C08L23/12C08L53/02C08L51/06C08K13/06C08K9/10C08K7/00C08K3/34C08K5/42C08K5/14
CPCC08J9/08C08J9/0061C08J9/009C08J9/0066C08J9/0033C08J9/0023C08J9/0095C08J2203/02C08J2323/12C08J2453/02C08J2451/06C08K13/06C08K9/10C08K7/00C08K3/34C08K5/42C08K5/14
Inventor 汪理文翁永华徐翠萍陈胜董超
Owner 苏州润佳高分子材料有限公司
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