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Foamed EVA material capable of being bonded with nylon and preparation method of foamed EVA material

A nylon and bonding technology, applied in the field of EVA material preparation, can solve problems affecting sheet metal cavity sealing, EVA material degumming, sagging, etc., and achieve the effect of reducing odor, increasing high temperature viscosity, and preventing poor sealing

Pending Publication Date: 2020-12-04
TIANJIN GUOXIN RUBBER & PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of expansion rubber block cannot be bonded to nylon, and needs to be fixed through locking holes or positioning holes. EVA materials are prone to problems such as degumming, sagging, and bridging during the foaming process, which will seriously affect the sheet metal. Gold cavity plugging

Method used

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  • Foamed EVA material capable of being bonded with nylon and preparation method of foamed EVA material
  • Foamed EVA material capable of being bonded with nylon and preparation method of foamed EVA material
  • Foamed EVA material capable of being bonded with nylon and preparation method of foamed EVA material

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Embodiment Construction

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the best embodiments.

[0024] A kind of preparation method of the foamed EVA material that can bond nylon, comprises the following steps:

[0025] (1) 40-80 parts of EVA, 1-20 parts of polyolefin graft copolymer, 0-20 parts of filler, 1-20 parts of foaming agent, 1-10 parts of lubricant, 0.3-2 parts of antioxidant Parts are mixed in a high mixer for 5-10 minutes to fully mix;

[0026] (2) Fully mix 0.1-2 parts of foaming aid, 0.2-3 parts of cross-linking agent, and 0.1-2 parts of cross-linking aid in a high mixer;

[0027] (3) The material fully mixed in step (1) is added in the twin-screw extruder through the hopper, and the material fully mixed in step (2) is added in the twin-screw extruder from the first side feeding port, and 0-30 parts of the filler are fed into the...

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Abstract

The invention relates to a foamed EVA material capable of being bonded with nylon. The foamed EVA material comprises the following components in parts by weight: 40-80 parts of an ethylene-vinyl acetate copolymer; 1-20 parts of a polyolefin graft copolymer; 0-30 parts of a filler; 5-25 parts of tackifying resin; 1-20 parts of a foaming agent; 0.1-2 part of a foaming aid; 0.2-3 part of a cross-linking agent; 0.1-2 part of a cross-linking auxiliary agent; 1-10 parts of a lubricant; and 0.3-2 part of an antioxidant. The preparation method comprises the following steps: adding the fully and uniformly mixed materials into a double-screw extruder through a hopper, and extruding and granulating at the temperature of 70-120 DEG C at the screw rotating speed of 200-800r / min.

Description

technical field [0001] The invention relates to the technical field of EVA material preparation, in particular to a foamed EVA material capable of bonding nylon and a preparation method thereof. Background technique [0002] With the advancement of automobile manufacturing technology, the control of noise and vibration in the passenger car has gradually attracted attention. The control level of noise and vibration in the car has gradually become one of the important symbols of the design level and vehicle quality of passenger cars. When the car is running at high speed, the high-speed airflow will cause the sheet metal parts to rub and produce a strong roar, which will seriously affect the comfort of the driver and passengers. In order to solve this problem, an expansion rubber block with nylon as the skeleton and coated with EVA foam material is usually used to realize the internal blockage of the sheet metal, thereby blocking the passage of airflow. However, this type of ...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L51/06C08J9/10C08J9/08
CPCC08J9/102C08J9/105C08J9/08C08J9/0061C08J2323/08C08J2451/06C08J2423/08C08J2203/18
Inventor 谢宇张学盈
Owner TIANJIN GUOXIN RUBBER & PLASTIC