Production method of DMC composite material

Abstract

The invention discloses a production method of a DMC composite material, and belongs to the field of material preparation. The specific method comprises the following steps: 1) adding 60-100 parts by mass of unsaturated polyester fibers and 30-50 parts by mass of glass fibers in a mass ratio of 2: 1 at normal temperature, uniformly mixing the unsaturated polyester fibers and the glass fibers, and standing for later use; (2) adding and mixing a cross-linking agent and a thickening agent according to the ratio of 1: 1, and then putting the mixture into the mixture of the unsaturated polyester fibers and the glass fibers in the step (1); and (3) putting the filler into the mixture in the step (2), and uniformly stirring, and (4) selecting chopped twistless roving as a core material, and carrying out mold pressing on the mixture obtained in the step (3) to the surface of the core material by adopting a mold pressing process. According to the invention, the recycled twisted yarn is used as the filler, in addition, the chopped twistless roving is selected as the core material, and the glass fiber is compounded to form the material, so that the material has remarkable characteristics, the alkali resistance is qualitatively improved, and the tensile strength is higher.

Description

technical field

[0001] The invention belongs to the field of material preparation, in particular to a production method of a DMC composite material. Background technique

[0002] DMC, sometimes referred to as BMC, Chinese translation is referred to as bulk molding compound, the main components of BMC and DMC are the same, and they are called differently according to the industry or the area where they are used. The United Kingdom is the first country to adopt the abbreviation of DMC, and the abbreviation of BMC is more popular in the United States. DMC materials have a long history and have been used in a wide range of time. my country began to introduce British technology, and DMC is used more in China, especially in the electrical industry.

[0003] Most of the DMC materials that appear on the market are relatively stable in composition and relatively poor in tensile strength. The improvement all the time is only the modification of the composition ratio, but the modific...

Examples

Embodiment 1

[0019] A kind of production method of DMC composite material in the present embodiment is:

[0020] Step 1: Add unsaturated polyester fiber and glass fiber at a mass ratio of 2:1 at normal temperature, wherein unsaturated polyester fiber: 90 parts, glass fiber: 45 parts, mix the two with, Stand by;

[0021] Step 2: Add and mix the cross-linking agent and thickener in a ratio of 1:1, cross-linking agent: 1.5 parts, thickener: 1.5 parts, and put the unsaturated polyester fiber and glass fiber in step 1 after mixing. in the mixture;

[0022] Step 3: put the filler into the mixture of step 2, filler: 6 parts, the filler is reclaimed twisted yarn, just stir well;

[0023] Step 4: Chopped roving is selected as the core material, and the mixture in step 3 is molded onto the surface of the core material by molding process.

Embodiment 2

[0025] A kind of production method of DMC composite material in the present embodiment is:

[0026] Step 1: Add unsaturated polyester fiber and glass fiber at a mass ratio of 2:1 at normal temperature, wherein unsaturated polyester fiber: 100 parts, glass fiber: 50 parts, mix the two with, Stand by;

[0027] Step 2: Add and mix the cross-linking agent and thickener in a ratio of 1:1, cross-linking agent: 2 parts, thickener: 2 parts, and put the unsaturated polyester fiber and glass fiber in step 1 after mixing. in the mixture;

[0028] Step 3: put the filler into the mixture of step 2, filler: 10 parts, the filler is recycled twisted yarn, just stir well;

[0029] Step 4: Chopped roving is selected as the core material, and the mixture in step 3 is molded onto the surface of the core material by molding process.

Embodiment 3

[0031] A kind of production method of DMC composite material in the present embodiment is:

[0032] Step 1: Add unsaturated polyester fiber and glass fiber at a mass ratio of 2:1 at normal temperature, wherein unsaturated polyester fiber: 60 parts, glass fiber: 30 parts, mix the two with, Stand by;

[0033] Step 2: Add and mix the cross-linking agent and thickener in a ratio of 1:1, cross-linking agent: 1 part, thickener: 1 part, and put the unsaturated polyester fiber and glass fiber in step 1 after mixing. in the mixture;

[0034] Step 3: put the filler into the mixture of step 2, filler: 5 parts, the filler is the recycled twisted yarn, just stir well;

[0035] Step 4: Chopped roving is selected as the core material, and the mixture in step 3 is molded onto the surface of the core material by molding process.

technical field

[0001] The invention belongs to the field of material preparation, in particular to a production method of a DMC composite material. Background technique

[0002] DMC, sometimes referred to as BMC, Chinese translation is referred to as bulk molding compound, the main components of BMC and DMC are the same, and they are called differently according to the industry or the area where they are used. The United Kingdom is the first country to adopt the abbreviation of DMC, and the abbreviation of BMC is more popular in the United States. DMC materials have a long history and have been used in a wide range of time. my country began to introduce British technology, and DMC is used more in China, especially in the electrical industry.

[0003] Most of the DMC materials that appear on the market are relatively stable in composition and relatively poor in tensile strength. The improvement all the time is only the modification of the composition ratio, but the modific...

Examples

Embodiment 1

[0019] A kind of production method of DMC composite material in the present embodiment is:

[0020] Step 1: Add unsaturated polyester fiber and glass fiber at a mass ratio of 2:1 at normal temperature, wherein unsaturated polyester fiber: 90 parts, glass fiber: 45 parts, mix the two with, Stand by;

[0021] Step 2: Add and mix the cross-linking agent and thickener in a ratio of 1:1, cross-linking agent: 1.5 parts, thickener: 1.5 parts, and put the unsaturated polyester fiber and glass fiber in step 1 after mixing. in the mixture;

[0022] Step 3: put the filler into the mixture of step 2, filler: 6 parts, the filler is reclaimed twisted yarn, just stir well;

[0023] Step 4: Chopped roving is selected as the core material, and the mixture in step 3 is molded onto the surface of the core material by molding process.

Embodiment 2

[0025] A kind of production method of DMC composite material in the present embodiment is:

[0026] Step 1: Add unsaturated polyester fiber and glass fiber at a mass ratio of 2:1 at normal temperature, wherein unsaturated polyester fiber: 100 parts, glass fiber: 50 parts, mix the two with, Stand by;

[0027] Step 2: Add and mix the cross-linking agent and thickener in a ratio of 1:1, cross-linking agent: 2 parts, thickener: 2 parts, and put the unsaturated polyester fiber and glass fiber in step 1 after mixing. in the mixture;

[0028] Step 3: put the filler into the mixture of step 2, filler: 10 parts, the filler is recycled twisted yarn, just stir well;

[0029] Step 4: Chopped roving is selected as the core material, and the mixture in step 3 is molded onto the surface of the core material by molding process.

Embodiment 3

[0031] A kind of production method of DMC composite material in the present embodiment is:

[0032] Step 1: Add unsaturated polyester fiber and glass fiber at a mass ratio of 2:1 at normal temperature, wherein unsaturated polyester fiber: 60 parts, glass fiber: 30 parts, mix the two with, Stand by;

[0033] Step 2: Add and mix the cross-linking agent and thickener in a ratio of 1:1, cross-linking agent: 1 part, thickener: 1 part, and put the unsaturated polyester fiber and glass fiber in step 1 after mixing. in the mixture;

[0034] Step 3: put the filler into the mixture of step 2, filler: 5 parts, the filler is the recycled twisted yarn, just stir well;

[0035] Step 4: Chopped roving is selected as the core material, and the mixture in step 3 is molded onto the surface of the core material by molding process.