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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 from 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, low manufacturing cost, and high cost. The effect of improving the bonding force

Inactive Publication Date: 2007-11-07
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 a large amount of organic wastewater, even high-concentration COD organic wastewater that is difficult to treat; (4) The shape of glass fiber cloth scraps is messy, and the hardness of the fibers is high, so it is chopped with a knife Extremely difficult, which means that the cost of chopping would be prohibitive
Although this method is feasible, the processing cost of chopping and whipping is too high
Deep burial treatment will not cause lasting pollution to the groundwater quality at the deep burial site, but it will be treated as solid waste, wasting valuable glass fiber resources

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0028] Example 2 The brake friction material molding compound and its molded products were prepared by indirect method. Firstly, the glue-containing short fiber bundles were prepared with glass fiber cloth scraps and BY120 resin with 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) of 2,000mPas, and urotropine content of 5-6%. Add one-fourth to one-fifth of the total amount of resin and leftovers into the kneader, feed steam into the jacket of the kneader, start the kneader, and gradually add the remaining leftovers. When the temperature of the material in the kneader reaches about 60°C, stop adding steam, and the residual heat of the jacket can make the temperature in the kneader rise slowly. When the temperature reaches 75°C, start the vacuum pump to make the vacuum in the kneader 20-60KPa , The material is kneaded for 15-60 minutes under t...

Embodiment 4

[0034] Example 4 Preparation of rubber wheel molding compound and its products by indirect method. Firstly, glued short fiber bundles were prepared with glass fiber cloth scraps and BY150 resin with 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 75%, viscosity (25°C) 3,000mPas, and urotropine content 5-6%. Add one-fourth to one-fifth of the total amount of resin and leftovers into the kneader, feed steam into the jacket of the kneader, start the kneader, and gradually add the remaining leftovers. When the temperature of the material in the kneader reaches about 60°C, stop adding steam, and the residual heat of the jacket can make the temperature in the kneader rise slowly. When the temperature reaches 75°C, start the vacuum pump to make the vacuum in the kneader 20-60KPa , The material is kneaded for 10-30 minutes under the above-mentioned vacuum degree and temperatur...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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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 invention relates to a method for manufacturing molding compound and molding products from glass fiber cloth leftovers. Background technique [0002] After being impregnated with thermosetting resin and dried properly, 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 and other varieties. At present, there is no effective recycling method for glass fiber cloth scraps treated with such resins, and they can only be used as Solid waste disposal not only wastes resources but also pollutes the environment. For this kind of glass fiber cloth scraps, there are generally two treatment methods: one method is to use deep burial treatment, but because the thermosetting resin on the scraps is uncured resin, some scraps have a resin content as high...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
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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