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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, and achieve the effects of vibration and noise reduction, good fluidity, and uniform cells

Inactive Publication Date: 2005-02-23
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] Embodiment 1, the preparation of embedded expandable sheet for passenger car

[0020] The main equipment is XK--250D type open mill, SCQ200 pelletizer, SH--100 type high-speed mixer, CJ150M3V type 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 2.3%, 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]Firstly, according to the foaming master batch ratio, accurately weigh EVA (brand 250, produced by DuPont, USA) 10Kg, AC foaming agent (AC content greater than 98%, produced by Jiangsu Suopu Chemical Co., Ltd.) 30Kg, zinc stearate (zinc content greater than 98%) 13.1%) 2Kg, polyethylene wax (melting point 100-120 ℃) ​​1Kg, antioxidant (CHEMKY B-255 produced in Taiwan) 0.1Kg, after mixing evenly in SH--100...

Embodiment 2

[0023] Embodiment 2, the preparation of in-line expandable expandable sheet for vehicle

[0024] The main equipment is the same as in Example 1, except that the plastic injection molding machine is a CJ80M2V injection molding machine with a clamping force of 80t.

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

[0026] The obtained foam masterbatch 6Kg, EVA (brand 18 / 3 Beijing Chemical Plant) 50Kg, crosslinking agent DCP (purity greater than 99%, Shanghai Gaoqiao Chemical Production) 0.3Kg, mixed in SH--100 type high-speed The machine is mixed evenly and used as the raw material for injection molding. Add the injection molding raw materials to the hopper of the CJ80M2V plasti...

Embodiment 3

[0027] Embodiment 3, the preparation of in-line expandable expandable sheet for vehicle

[0028] The main equipment and the control process for preparing the expandable sheet are the same as those in Example 1.

[0029] The foaming masterbatch ratio 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 EVA (brand VA800 produced by Hyundai Korea) 10Kg, foaming agent benzenesulfonyl hydrazide (content more than 95% produced in Shanghai) 10Kg and AC foaming agent (AC content more than 98% Jiangsu Suo) according to the proportion of foaming masterbatch Pu Chemical Co., Ltd.) 10Kg, zinc stearate (zinc content greater than 13.1%) 2Kg, polyethylene wax (melting point 100-120 ℃) ​...

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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 the molding or connection of plastic processing, in particular to a method of preparing foamed masterbatches by using a double-roll mill, then mixing the foaming masterbatches with polyolefin matrix resin and crosslinking agent by a mixer, and then injecting The invention discloses a preparation method of an inline-embedded expandable sheet for a car with expandable function, which is prepared by injection molding of a molding machine. Background technique [0002] There are gaps and cavities between the various metal parts and non-metal parts of the existing domestically manufactured cars, which cause vibration and noise when the car is running, thus affecting the comfort of the car, and at the same time It also causes noise pollution to the surrounding environment, and limits the further improvement of domestic car manufacturing level and car grade. SUMMARY OF THE INVENTION [...

Claims

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Application Information

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