1.0 meter wide sheet molding compound and molding process thereof

A technology of sheet molding compound and molding process, which can be applied to other home appliances, applications, home appliances, etc., and can solve problems such as poor quality strength, unstable quality, and heavy workload.

Inactive Publication Date: 2009-12-09
ZHEJIANG LONGXIN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the maximum width of domestic SMC sheets is only 0.6 meters wide, and for processing larger devices with SMC sheets, such as car door panels, etc., it is necessary to cut and combine multiple small-sized SMC sheets, which requires a lot of work. , and the quality and strength are relatively poor, so processing and forming large-size SMC sheets is an urgent problem to be solved in this industry. The most intuitive thing is the uneven hardness of the sheet. In some places the sheet is very hard, which often leads to poor fluidity during pressing, and in some places it is too soft, which makes workers stick to their hands during operation, and the film on the outer surface also It is full of resin, which not only increases the inconvenience of operation, but also the pressed molded products are prone to defects such as bubbles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Mix 60 parts of unsaturated polyester resin and 40 parts of low-profile shrinkage agent according to their proportions, stir and mix evenly; this process is carried out in a high-speed mixer, stirring for 2 minutes at a low speed of 300 rpm;

[0031] 2), then add wetting and dispersing agent, 1.5 parts; processing aid, 4 parts; benzoyl tert-butyl peroxide, 1.5 parts; cobalt accelerator, 1 part; Mix evenly; this process is carried out in a high-speed mixer, stirring at a low speed of 300 rpm for 2 minutes; among them, BYK-W9010 and BYK-P 9080 are produced by BYK, Germany.

[0032] 3), then add calcium carbonate, 210 parts, fully stir for at least 5 minutes to mix evenly; this process is carried out in a high-speed mixer, stirring at a low speed of 300 rpm for 2 minutes; this process is carried out in a high-speed mixer, at a high speed of 600 rpm Stir at high speed for 5 minutes;

[0033] 4), then add magnesium oxide, 2.6 parts, stir and mix evenly, this process is c...

Embodiment 2

[0036] 1), unsaturated polyester resin, 60 parts + 10%; low profile shrinkage agent, 40 parts + 10%, stir and mix evenly according to their proportions; this process is carried out in a high-speed mixer, at a low speed of 300 rpm, stirring 2 minutes;

[0037] 2), then add wetting and dispersing agent, 1.5 parts + 10%; processing aid, 4 parts + 10%; benzoyl tert-butyl peroxide, 1.5 parts + 10%; cobalt accelerator, 1 part + 10% ; p-benzoquinone, 0.5 parts + 10%, stir and mix evenly according to its proportion; this process is carried out in a high-speed mixer, stirring at a low speed of 300 rpm for 2 minutes; among them, BYK-W9010 and BYK-P 9080 are produced by German BYK company Production.

[0038] 3), then add calcium carbonate, 210 parts + 10%, fully stir for at least 5 minutes to mix evenly; this process is carried out in a high-speed mixer, stirring at a low speed of 300 rpm for 2 minutes; this process is carried out in a high-speed mixer, at a high speed of 600 Stir at ...

Embodiment 3

[0042] 1), unsaturated polyester resin, 60 parts-10%; low profile shrinkage agent, 40 parts-10%, stir and mix evenly according to their proportions; this process is carried out in a high-speed mixer, at a low speed of 300 rpm, stirring 2 minutes;

[0043] 2), then add wetting and dispersing agent, 1.5 parts-10%; processing aid, 4 parts-10%; benzoyl tert-butyl peroxide, 1.5 parts-10%; cobalt accelerator, 1 part-10% ; p-benzoquinone, 0.5 parts -10%, stir and mix according to its proportion; this process is carried out in a high-speed mixer, stirring at a low speed of 300 rpm for 2 minutes; wherein BYK-W9010 and BYK-P 9080 are produced by German BYK company Production.

[0044] 3), then add calcium carbonate, 210 parts -10%, fully stir for at least 5 minutes to mix evenly; this process is carried out in a high-speed mixer, stirring at a low speed of 300 rpm for 2 minutes; this process is carried out in a high-speed mixer, with a high speed of 600 Stir at rpm speed for 5 minutes...

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Abstract

The invention discloses 1.0 meter wide sheet molding compound and a molding process thereof. The molding compound comprises the following compositions in portion by mass: 60 portions of + / -10 percent unsaturated polyester resin, 40 portions of + / -10 percent low profile shrinking agent, 1.5 portions of + / -10 percent moistening dispersant, 4 portions of + / -10 percent processing aid, 1.5 portions of + / -10 percent tert-butyl benzoperoxide, 1 portion of + / -10 percent cobalt accelerant, 0.5 portion of + / -10 percent para-benzoquinone, 210 portions of + / -10 percent calcium carbonate, 2.6 portions of + / -10 percent magnesium oxide, and glass fiber which accounts for 18 to 28 percent of total mass of the compositions by mass. The molding process has the advantage that the process can obtain the molding compound with 1.0 meter width, thickened and even surface and good performance.

Description

technical field [0001] The invention relates to a molding process of a material, in particular to a molding process of a sheet molding compound with a width of 1.0 meters. Background technique [0002] Sheet molding compound (Sheet molding compound, SMC) is a dry sheet prepreg composed of unsaturated polyester resin, low shrinkage additives, fillers, curing agents, thickeners, release agents and glass fibers. , it has the characteristics of low shrinkage, high strength, convenient molding, etc., and is especially suitable for industrialized large-scale production. [0003] In recent years, especially in the thickening technology, low shrinkage technology and composite initiation technology of SMC, new progress has been continuously made, which has promoted the promotion and application of SMC molding compounds and their products to obtain considerable development. At present, SMC technology has become one of the most important and fastest-growing forming methods in the fiel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08K13/04C08K3/26C08K5/08C08K3/22C08K5/14C08K7/14B29D7/01
Inventor 朱超王麒庄加勇金小钊
Owner ZHEJIANG LONGXIN CHEM CO LTD
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