TPV material capable of being foamed by injection molding, and preparation method and application thereof
A technology of injection molding foaming and foaming masterbatch, which is applied in the field of thermoplastic vulcanizate, and can solve the problems of low hardness, good elastomer, and poor foaming performance
Active Publication Date: 2021-05-04
KINGFA SCI & TECH CO LTD
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Problems solved by technology
[0008] In order to overcome the defects of poor foaming performance in the prior art, the present invention provides a TPV material, which can be foamed by injection molding, has high foaming ratio, low hardness after foaming, and good elastomer
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1～14
[0078] The content of each component in the TPV materials of Examples 1-14 is shown in Table 1.
[0079] Its preparation method is:
[0080] S1. Mix low-melt PP resin, high-melt PP resin, EPDM rubber, vulcanization accelerator, antioxidant, and light stabilizer and add them to the main feeding port of the twin-screw extruder. Add paraffin oil to the third screw barrel of the twin-screw extruder, add vulcanizing agent to the sixth screw barrel of the twin-screw extruder, melt and mix, extrude and granulate to obtain the first TPV pellets; the long diameter of the screw of the twin-screw extruder The ratio is 60:1, the screw speed is 500-650r / min, and the melting temperature is 160-200°C;
[0081] S2. Add the first TPV pellets, SEBS elastomer and lubricant to the twin-screw extruder after mixing, inject water into the sixth section of the screw barrel of the twin-screw extruder, and the injection weight of water is 5% of the weight of the TPV semi-finished product ~20%, vacuum...
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Abstract
The invention discloses a TPV material capable of being foamed by injection molding, and a preparation method and application thereof. The TPV material comprises low-melt-index PP resin, high-melt-index PP resin, EPDM rubber, an SEBS elastomer, paraffin oil, a vulcanizing agent, a vulcanization accelerator, an antioxidant, a light stabilizer, a lubricant and foaming master batch, the melt index of the low-melt-index PP resin is 230 DEG C and is less than or equal to 4g / 10min under the condition of 2.16 kg, the melt index of the high-melt-index PP resin is 230 DEG C and is more than or equal to 50g / 10min under the condition of 2.16 kg, the SEBS elastomer is linear SEBS, the average molecular weight is 5-10 thousand, and the foaming master batch is prepared from an inorganic foaming agent, POE and microcrystalline wax. Through mutual cooperation and synergistic interaction of the low-melt-index PP resin, the high-melt-index PP resin, the SEBS elastomer and the foaming master batch with the EPDM rubber, the lubricant and other components, the TPV material capable of being foamed through injection molding is prepared. After the TPV material is foamed, foam holes are uniform, the foaming ratio is greater than or equal to 1.2, and the foamed material has relatively low hardness.
Description
technical field [0001] The invention relates to the technical field of thermoplastic vulcanized rubber, and more specifically, relates to an injection-molded foamable TPV material and a preparation method and application thereof. Background technique [0002] With the maturity of China's automobile industry and the improvement of people's living standards, people's requirements for safety and environmental protection of automotive interior materials are also increasing. Soft dashboards are loved by people for their novel and beautiful appearance and comfortable feel. In view of these requirements, higher requirements are put forward for the materials and processes of instrument panel manufacturing. [0003] In the prior art, the molding methods of automobile instrument panels mainly include slush molding process molding and female mold suction molding. The operation method of the slush molding process is mainly to melt the PVC material into a film, and then heat-treat the f...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C08L91/06C08L23/16C08L23/12C08L53/02C08L23/08C08K5/20C08K5/14C08K5/00C08J9/08C08J9/00
CPCC08J9/08C08J9/0061C08J2391/06C08J2423/16C08J2423/12C08J2453/02C08J2423/08C08J2203/02C08K5/20C08K5/14C08K5/00
Inventor 邱贤亮黄险波叶南飚郑明嘉叶林铭赵巍王刚陈炜鑫
Owner KINGFA SCI & TECH CO LTD