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Preparing method for embedded expanding piece of car

A technology of expansion sheet and car, applied in the direction of coating, etc., can solve the problems of vibration and noise, achieve the effects of reducing vibration and noise, improving grades, and avoiding noise pollution

Inactive Publication Date: 2007-10-31
HENKEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defects of vibration and noise caused by the gaps and cavities in the components of the current domestic assembled cars, and provide a method to fill these gaps and cavities with foaming materials to fix the assembly. To prevent parts from loosening, use a double-roll mill to prepare foaming masterbatches, and then mix the foaming masterbatches with polyolefin matrix resin and crosslinking agent through a mixer, or directly mix foaming agent, foaming aid, dispersing Additives, etc., polyolefin matrix resin and cross-linking agent are prepared by mixing with a double-roll mill to form a masterbatch, and then injection molded by an injection molding machine to obtain an embedded expandable sheet for cars with expandable functions. preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1, the preparation of an embedded expandable sheet for a car

[0020] The main equipment is XK--250D open mill, SCQ200 granulator, SH--100 high-speed mixer, CJ150M3V plastic injection molding machine with clamping force of 150t.

[0021] Foaming masterbatch ratio EVA23.2%, AC foaming agent 69.6%, lead stearate 4.7%, polyethylene wax 23%, antioxidant 0.2%; foaming masterbatch and polyolefin matrix resin and crosslinking agent The mixing ratio of foaming masterbatch is 12.2%, LDPE 43.4%, EVA 43.4%, and crosslinking agent DCP 1.0%.

[0022]Accurately weigh 10Kg of EVA (brand 250 produced by U.S. DuPont Company), AC foaming agent (produced by Jiangsu Thorpe Chemical Co., Ltd. with AC content greater than 98%), zinc stearate (produced by Jiangsu Thorpe Chemical Co., Ltd. 13.1%) 2Kg, polyethylene wax (melting point 100-120°C) 1Kg, antioxidant (°C HEMKY B-255 produced in Taiwan) 0.1Kg, after SH--100 type high-speed mixer is mixed evenly, weigh 2Kg each time Mixing is...

Embodiment 2

[0023] Example 2, Preparation of Embedded Expandable Sheet for Vehicles

[0024] Except that the plastic injection molding machine is a CJ80M2V type clamping force 80t injection molding machine in the main equipment, other equipment is the same as embodiment 1.

[0025] The composition ratio of the foam masterbatch and the preparation operation control process of the expandable sheet are the same as in Example 1. The mixing ratio of the foam masterbatch, the polyolefin matrix resin and the crosslinking agent is 10.7% of the foam masterbatch and 88.8% of EVA , Cross-linking agent DCP 0.5%.

[0026] The foam masterbatch 6Kg that will make, EVA (brand 18 / 3 Beijing chemical factory production) 50Kg, crosslinking agent DCP (purity is greater than 99%, Shanghai Gaoqiao chemical industry production) 0.3Kg, in SH-100 type high-speed mixer Mix well and use it as injection molding raw material. Put the injection molding raw materials into the hopper of a CJ80M2V plastic injection mold...

Embodiment 3

[0027] Example 3, Preparation of Embedded Expandable Sheet for Vehicles

[0028] The main equipment and the preparation operation control process of the expandable sheet are the same as in Example 1.

[0029] The proportion of foaming masterbatch is EVA 30.2%, foaming agent benzenesulfonyl hydrazide 30.2%, foaming agent AC30.2%, zinc stearate 6.1%, polyethylene wax 3.0%, antioxidant 0.3%; foaming The mixing ratio of masterbatch, polyolefin matrix resin and crosslinking agent is 16.5% of foaming masterbatch, 41.4% of LDPE, 41.4% of EVA, and 0.7% of crosslinking agent DCP.

[0030] First accurately weigh 10Kg of EVA (brand VA800 produced by Hyundai Korea), 10Kg of foaming agent benzenesulfonylhydrazide (produced in Shanghai with a content greater than 95%) and AC foaming agent (with an AC content greater than 98% of Jiangsu Suo) according to the proportion of the foaming masterbatch. Pu Chemical Co., Ltd.) 10Kg, zinc stearate (zinc content greater than 13.1%) 2Kg, polyethylene ...

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Abstract

Am embedded expandable plate for car is prepared through prepairng the foaming mother particles from resin, foaming agent, foaming assistant and disperser, proportionally mixing then with polyolefin resin and cross-linking agent, and injection moulding.

Description

technical field [0001] The invention relates to molding or connection of plastic processing, especially refers to a method of preparing foam masterbatches by using a double-roller mill, then mixing the foam masterbatches with polyolefin matrix resin and crosslinking agent through a mixer, and then injecting The invention relates to a preparation method of an embedded expandable sheet for a car with an expandable function obtained by injection molding of a molding machine. Background technique [0002] There are gaps and cavities between the various metal parts and non-metallic parts of the existing domestic-made cars, which make the car vibrate and make noise during operation, thus affecting the comfort of the car. It also causes noise pollution to the surrounding environment, and limits the further improvement of domestic car manufacturing level and car grade. Contents of the invention [0003] The technical problem to be s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/00B29B9/04B29B7/02C08K5/23B29K23/00B29K31/00
Inventor 王东川钱时杰徐国平朱华平
Owner HENKEL CORP