Polypropylene composite for extrusion foaming

A composite material and extrusion foaming technology, which is applied in the field of polypropylene composite materials and polypropylene composite materials for extrusion foaming, can solve the problems of low strength, low strength and use of foamed polypropylene, and improve the damping performance. , good sound insulation and shock absorption, the effect of expanding the application field

Inactive Publication Date: 2019-08-09
QINGDAO HAIER NEW MATERIAL R&D CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material has low strength and cannot be used as a structural material
[0004] The foam material itself can also be used as a noise reduction material. The principle is that the multiple reflections of sound waves in the cells are consumed. Although the foam material has a certain noise reduction and sound insulation effect, its effect is not ideal. This is because both After foaming, the damping factor of polypropylene is still less than 0.1
[0005] In addition, the strength of expanded polypropylene is low. This is because the strength of the foamed material is inversely proportional to the expansion ratio. Only 0.7-3MPa, the tensile strength can be increased to 2-8MPa after modification, but the strength is still far from meeting the requirements of expanded polypropylene

Method used

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  • Polypropylene composite for extrusion foaming
  • Polypropylene composite for extrusion foaming
  • Polypropylene composite for extrusion foaming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] According to the formula requirements, weigh 30 parts of polypropylene (WB140 HMS), 40 parts of damping thermoplastic elastomer 5127, 20 parts of reinforcing material glass fiber, 10 parts of maleic anhydride grafted polypropylene, and 0.2 parts of antioxidant 1010, lubricant 0.2 parts and light stabilizer, etc., all materials except glass fiber are mixed with a high-speed mixer for 3 to 5 minutes, then added to the twin-screw extruder from the main feeding port, glass fiber is added to the side feeding port, and the twin-screw extruder The rotating speed of the machine is 300-700RPM, the temperature is 180-220°C, and then the base material of the desired product can be obtained after cooling and pelletizing.

[0035] Using supercritical carbon dioxide / butane as a composite foaming agent, the obtained substrate was extruded and foamed through a twin-screw extruder using a tubular die to obtain a foamed sheet with a density of 0.695.

Embodiment 2

[0037] According to the formulation requirements, weigh 36 parts of polypropylene (WB140 HMS), 30 parts of damping thermoplastic elastomer 5127, 30 parts of reinforcing material mica, 4 parts of maleic anhydride grafted polyethylene, 0.1 part of antioxidant 1076, and 0.2 parts of lubricant Parts and light stabilizers, etc., all materials except mica powder are mixed with a high-speed mixer for 3 to 5 minutes, then added to the twin-screw extruder from the main feed port, mica powder is added to the side feed port, and twin-screw extrusion The rotating speed of the machine is 300-700RPM, the temperature is 180-220°C, and then the base material of the desired product can be obtained after cooling and pelletizing.

[0038]Using supercritical carbon dioxide as a foaming agent, the obtained substrate was extruded and foamed through a twin-screw extruder using a tubular die to obtain a foamed sheet with a density of 0.189.

Embodiment 3

[0040] According to the formula requirements, weigh 60 parts of polypropylene (WB140 HMS), 15 parts of damping thermoplastic elastomer 5127, 15 parts of reinforcing material carbon fiber, 1 part of maleic anhydride grafted POE, 0.4 part of antioxidant 1330, and 0.2 part of lubricant And light stabilizer, etc., all materials except carbon fiber are mixed with a high-speed mixer for 3 to 5 minutes, then added to the twin-screw extruder from the main feed port, carbon fiber is added to the side feed port, the speed of the twin-screw extruder The temperature is 300-700RPM, the temperature is 180-220°C, and then the base material of the desired product can be obtained after cooling and pelletizing.

[0041] Using supercritical carbon dioxide / butane as a composite foaming agent, the obtained substrate was extruded and foamed through a twin-screw extruder using a tubular die to obtain a foamed sheet with a density of 0.24.

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Abstract

The invention relates to a polypropylene composite for extrusion foaming. The composite comprises, by weight, 30-70 parts of polypropylene, 15-40 parts of a damping material, 10-30 parts of a reinforcing material, 1-10 parts of a compatibilizer and 0.05-0.5 part of an antioxidant. The polypropylene has the melting index of 0.5-10 g / 10 min (230 DEG C and 2.16 kg) and the melt strength larger than 30 cN (capillary traction method and 2-mm mouth model), and the damping material is a damping polymer or a damping polymer composite with the maximum damping coefficient tan delta large than 0.3 withinthe range of 0-50 DEG C. The foaming requirement can be met after the high-melt-strength polypropylene and the damping material are combined together in the polypropylene composite, the polypropylenecomposite has the synergistic effects of damping and shock absorbing and has the effect of enhancing the damping performance of the composite, and the damping performance of the composite is greatlyimproved.

Description

technical field [0001] The invention relates to a polypropylene composite material, in particular to a polypropylene composite material for extrusion foaming, and belongs to the technical field of polymer materials. Background technique [0002] Damping materials refer to materials that have a high damping factor (above tanδ0.1) at operating temperature and can significantly reduce vibration and noise, such as IIR, NBR, PIB, asphalt and some other polymers. The loss factor of these materials at the service temperature is higher than 0.1, even higher than 1.0, which can convert the kinetic energy of material vibration into heat energy, reduce vibration and noise. The loss factor refers to the ratio of the loss modulus to the elastic modulus of a polymer at a certain temperature and a certain frequency, which characterizes the part of the polymer that has kinetic energy converted into heat energy loss under a certain vibration. Since the polymer damping factor is the highest ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L23/12C08L51/06C08L97/02C08L51/04C08L23/22C08L51/00C08K7/14C08K7/04C08K7/06C08K9/06C08K5/134C08K3/34C08J9/12C08J9/14
CPCC08J9/122C08J9/141C08J2203/06C08J2203/08C08J2203/14C08J2203/182C08J2353/02C08J2423/12C08J2451/00C08J2451/04C08J2451/06C08J2497/02C08K3/34C08K5/1345C08K7/04C08K7/06C08K7/14C08K9/06
Inventor 张小虎苏超赵凤雯田洪池陈军张秀文宋义虎
Owner QINGDAO HAIER NEW MATERIAL R&D CO LTD
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