Method for mfg. moulding plastic and its products by offcut of glassfibre cloth

A technology for glass fiber cloth and molded products, which is applied in the field of manufacturing molding compounds and molded products by using glass fiber cloth scraps, can solve the problems of organic waste water, glass fiber strength damage and high cost, and achieves the utilization of waste resources and low manufacturing costs. , the effect of improving the bonding force

Inactive Publication Date: 2006-01-25
海盐华强树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method mainly has the following disadvantages: (1) the leftover material contains a certain amount of thermosetting resin, and some of the leftover material has a resin content as high as 20 to 25%. In addition, some of the leftover material contains a silane coupling agent. The above washing method makes the resin on the leftover material (2) Because the glass fiber has poor alkali resistance, soaking in a strong alkaline solution will cause great damage to the strength of the glass fiber. This damaged glass fiber can only Make low-grade materials; (3) Washing will produce

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0028] Example 2 Preparation of brake friction material molding compound and its molded products by indirect method. First, the glue-containing short fiber bundles were prepared with glass fiber scraps and BY120 resin in a weight ratio of 8:2. Glass fiber cloth scraps are scraps containing impregnated phenolic resin. The technical indicators of BY120 resin are: solid content of 75%, viscosity (at 25°C) 2,000mPas, and urotropine content of 5-6%. Add one-fourth to one-fifth of the total amount of resin and scraps into the kneader, pass steam into the jacket of the kneader, start the kneader, and gradually add the remaining scraps. When the temperature of the material in the kneader reaches about 60 ℃, stop adding steam, the residual heat of the jacket can make the temperature in the kneader rise slowly, when the temperature reaches 75 ℃, start the vacuum pump to make the vacuum degree in the kneader between 20 ~ 60KPa , the material is kneaded for 15 to 60 minutes under the con...

Embodiment 4

[0034] Example 4 The rubber wheel molding compound and its products were prepared by indirect method. First, the glue-containing short fiber bundles were prepared with glass fiber scraps and BY150 resin in a weight ratio of 8:2. Glass fiber cloth scraps are scraps containing impregnated phenolic resin. The technical indicators of BY150 resin are: solid content of 75%, viscosity (25°C) of 3,000mPas, and urotropine content of 5-6%. Add one-fourth to one-fifth of the total amount of resin and scraps into the kneader, pass steam into the jacket of the kneader, start the kneader, and gradually add the remaining scraps. When the temperature of the material in the kneader reaches about 60 ℃, stop adding steam, the residual heat of the jacket can make the temperature in the kneader rise slowly, when the temperature reaches 75 ℃, start the vacuum pump to make the vacuum degree in the kneader between 20 ~ 60KPa , the material is kneaded for 10 to 30 minutes under the above-mentioned va...

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PUM

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Abstract

A process for preparing the raw material for moulding and the moulded product from the glass fiber leftover features that the kneading machine is used as the shearing and dispersing apparatus and the thermosetting liquid resin is used as adhesive and lubricant. Under the squeezing, tearing, shearing and kneading of said kneading machine, the glass fiber leftover can become the adhesive contained bundles of fibers.

Description

technical field [0001] The present invention relates to a method for manufacturing molding compounds and molding products using glass fiber scraps. Background technique [0002] After being impregnated with thermosetting resin and properly dried, glass fiber cloth is cut or punched into a certain shape as a reinforcing material for some composite materials or molded products. The above-mentioned thermosetting resins are mainly uncured phenolic resins, epoxy resins, amino resins, furan resins, acrylic resins, etc. There is currently no effective recycling method for glass fiber scraps treated with such resins. It can be treated as solid waste, which wastes resources and pollutes the environment. For this kind of glass fiber cloth scrap, there are generally two treatment methods: one method is to use deep burial treatment, but because the thermosetting resin on the scrap is uncured resin, some scrap resin content is as high as 20-25%, containing High levels of free phenols, ...

Claims

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Application Information

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IPC IPC(8): B29C70/06B29C70/12B29C70/02B29C43/00B29C45/00B29K61/04B29K63/00B29K75/00
Inventor 胡以强
Owner 海盐华强树脂有限公司
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