CN114149655A

CN114149655A - High-foaming sound-insulation resin lining and nylon skeleton using same

Info

Publication number: CN114149655A
Application number: CN202111479133.8A
Authority: CN
Inventors: 水野晃辅
Original assignee: Iida Foshan Industry Co ltd
Current assignee: Iida Foshan Industry Co ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-03-08
Anticipated expiration: 2041-12-06
Also published as: CN114149655B

Abstract

The invention relates to a high-foaming sound-insulation resin lining which is formed by pressing double-layer core shell particles, wherein the double-layer core shell particles comprise an inner-layer core body and an outer-layer shell body, the core body is particles mainly prepared by mixing epoxy resin, nitrile rubber, a foaming agent and a processing aid, and the particle size of the core body is 0.1-1.5 mm; the shell is a thin layer mainly made of epoxy resin, thermoplastic resin, reinforcing fibers, a foaming agent and a processing aid, and the thickness of the shell is 0.1-1 mm. The resin lining has good sound absorption and insulation characteristics and high mechanical strength through the application of a double-layer core shell structure and the material thereof.

Description

High-foaming sound-insulation resin lining and nylon skeleton using same

Technical Field

The invention relates to the technical field of automobile sound insulation materials, in particular to a high-foaming sound insulation resin lining and a nylon framework using the resin lining.

Background

In the automobile manufacturing industry, in order to achieve light weight of an automobile, all automobile body sheet metal parts are designed to be hollow structures, so in order to improve silence and comfort of the automobile, sound absorbing materials are generally adhered to cavities of the sheet metal parts to improve NVH performance of the automobile.

Resin foam materials are used as structural materials for automobile parts as substitutes for existing solid resin materials or metal materials; the resin foaming material has the characteristics of low density, high heat insulation and buffering performance, so that the resin foaming material is effectively utilized. With the increasing demand for reducing accelerated noise in recent years, the existing sound-insulating resin materials are all of a single-layer foaming structure with fixed porosity, the sound-absorbing frequency band is narrow, and the sound-insulating effect is poor. Some foaming materials are foamed into a communicated bubble structure to improve the sound absorption and sound insulation performance of the foaming body, but the rigidity and the mechanical strength of the foaming material with the structure are poor; the foam material with the independent bubble structure has better rigidity and mechanical strength, but the sound absorption and sound insulation performance is not good, and the two foam materials can not simultaneously take good account of the characteristics of sound absorption and sound insulation and mechanical strength.

Disclosure of Invention

The invention provides a high-foaming sound insulation resin lining and a preparation method thereof based on the technical problems to be solved, wherein the resin lining has good sound absorption and insulation characteristics and high mechanical strength through a double-layer core shell structure and application of materials of the double-layer core shell structure.

In order to achieve the purpose, the invention adopts the technical scheme that

A high-foaming sound insulation resin lining is formed by pressing double-layer core shell particles, wherein the double-layer core shell particles comprise an inner-layer core body and an outer-layer shell body, the core body is particles mainly prepared by mixing epoxy resin, nitrile rubber, a foaming agent and a processing aid, and the particle size of the core body is 0.1-1.5 mm; the shell is a thin layer mainly made of epoxy resin, thermoplastic resin, reinforcing fibers, a foaming agent and a processing aid, and the thickness of the shell is 0.1-1 mm.

Furthermore, the porosity of the inner core particles after foaming is 60-88%, and the porosity of the outer shell after foaming is 40-75%.

In an improved technical scheme, the core body is mainly prepared from the following raw materials in parts by weight:

60-118 parts of mixed epoxy resin, 28-40 parts of foaming agent, 1-10 parts of foaming auxiliary agent, 25-45 parts of plasticizer, 2-5 parts of inorganic filler, 1-2 parts of vulcanizing agent, 2-5 parts of foam cell nucleating agent and 1-10 parts of water.

Further, the mixed epoxy resin is prepared by mixing the following raw materials in parts by weight: 10-35 parts of liquid epoxy resin, 30-65 parts of solid epoxy resin and 8-20 parts of solid rubber.

In an improved technical scheme, the shell is mainly prepared from the following raw materials in parts by mass:

30-60 parts of epoxy resin, 35-75 parts of nitrile rubber, 10-25 parts of methacrylonitrile, 3-12 parts of carbon fiber, 10-25 parts of foaming agent, 0.1-2 parts of foaming auxiliary agent, 1-3 parts of vulcanizing agent and 0.1-3 parts of deionized water.

Further, the raw material of the shell also comprises 25-40 parts of polyurethane resin.

The invention also discloses a preparation method of the high-foaming sound insulation resin lining in the second aspect, which comprises the following steps

1) Adding liquid epoxy resin, solid epoxy resin and solid rubber into an internal mixer for uniform internal mixing to obtain mixed epoxy resin, then adding inorganic filler into the mixed epoxy resin for continuous uniform internal mixing to obtain a mixture A1;

2) adding a foaming agent and a foaming accelerant into the mixture A1, continuously and uniformly mixing, then adding a vulcanizing agent and a foam cell nucleating agent, and continuously and uniformly mixing to obtain a core mixture A2;

3) adding epoxy resin and nitrile rubber into an internal mixer for uniform internal mixing, then adding a foaming agent, a foaming auxiliary agent and a vulcanizing agent for continuous uniform internal mixing to obtain a mixture B1;

4) mixing methacrylonitrile and carbon fibers, adding deionized water, uniformly stirring, adding the mixture B1, and continuously and uniformly mixing to obtain a shell mixture B2;

5) adding the core mixture A2 into a main extruder, adding the shell mixture B2 into an auxiliary extruder, extruding the materials of the main extruder and the auxiliary extruder by a core-shell co-extrusion process, and granulating by a high-speed granulator to obtain double-layer core-shell particles with a double-layer core-shell structure;

6) placing the double-layer core shell particles in a blanking container of an extruder, blanking the double-layer core shell particles into a mold, pressing and standing for 20-40 min, extruding and cutting the double-layer core shell particles into a required shape to obtain the high-foaming sound insulation resin lining; wherein the pressing environment is: the temperature is 30-45 ℃, the pressing pressure is 0.2-0.5 Pa, and the pressing time is 50-90 s.

The invention also discloses a nylon framework used when the high-foaming sound-insulation resin lining is applied, wherein the nylon framework is a panel with an elastic buckle plate on one side, the shape of the panel is matched with the shape of the cross section of a cavity of an installation part in a vehicle upright post, a plurality of fixing posts are arranged on the front side of the panel, a limiting groove is arranged on each fixing post, the nylon framework further comprises a limiting post inserted into the limiting groove, at least two long-strip-shaped supporting bars are arranged on the side edge of the top of the limiting post, and the supporting bars are linearly or radially distributed on the side edge of the top end of the limiting post.

Furthermore, the diameter of the supporting strip is 100-1000 microns; the length of the supporting strip is 2-20 mm;

the limiting groove is characterized in that a barb groove part is arranged on the inner side wall of the limiting groove, and a barb body matched with the barb groove part is arranged on the outer side wall of the limiting column.

Further, the limiting column is prepared by mixing a polyamide fiber material and a thermoplastic resin in a mixing ratio of 1-10: 1; the thermoplastic resin comprises one or more of polyethylene, polyethylene copolymer, soft polyvinyl chloride and thermoplastic elastomer;

part of the support bars are tapered support bars with the diameter gradually reduced from inside to outside, and the diameters of different tapered support bars at the same length position are different; the supporting bars are of strip structures with different lengths.

Compared with the prior art, the high-foaming sound insulation resin lining has the following beneficial effects:

the resin lining with the double-layer core-shell structure is flexibly arranged by selecting the materials of the core body and the shell, and the core body structure mainly made of the mixed epoxy resin and the nitrile rubber has a high-rate foaming effect and excellent foaming stability; the shell structure that gives first place to with epoxy, thermoplastic resin and reinforcing fiber makes holistic layer structure form honeycomb or the honeycomb-like structure, be the honeycomb-like structure after the foaming, this structure is crisscross to be separated from the core and forms multi-level different porosities, the three-dimensional panel of aperture size, the high porosity characteristics of its core make it have good sound absorbing effect, and the comparatively closely knit structure of shell makes it have good syllable-dividing effect, whole "sound absorbing layer + sound-proof layer" crisscross cellular spatial structure who constitutes, the sound insulation is inhaled comprehensively to the high efficiency of realizing high low frequency noise.

In addition, the honeycomb or honeycomb-like structure of the outer shell layer improves the structural strength of the foaming layer, including the rigidity in all directions, the tearing strength and the bending strength in all directions can be uniform, and the foaming layer can resist the destructive force from all directions. The shell layer of the resin lining comprises methacrylonitrile, carbon fiber and polyurethane resin, so that the foamed honeycomb-shaped structure is further shaped, the structural body has high mechanical strength, and meanwhile, the structural body has certain elastic bending strength.

The nylon framework of the invention is provided with the limit column to realize the installation and fixation of the resin lining, and simultaneously, the supporting bars on the limit column are pushed to form a longitudinal or oblique strut under the arch action when the resin lining is foamed; particularly, the supporting bars are arranged in structures with different lengths and diameters so that the supporting bars are distributed at different positions when the supporting bars are pushed to form a three-dimensional structure embedded into the foaming layer, and the mechanical strength of the whole foaming layer is greatly enhanced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a schematic cross-sectional view of the high-foaming acoustical resin liner of the present invention;

FIG. 2 is a schematic structural view of a nylon skeleton of the present invention;

FIG. 3 is a schematic structural view of the support bar of the present invention;

fig. 4A and 4B are schematic structural views of two embodiments of the spacing column of the invention.

Detailed Description

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The high-foaming sound-insulation resin liner 1 is formed by pressing double-layer core-shell particles, wherein the double-layer core-shell particles comprise an inner core body 2 and an outer shell body 3, as shown in figure 1; the core body 2 is particles mainly prepared by mixing epoxy resin, nitrile rubber, a foaming agent and a processing aid, and the particle size of the core body 2 is 0.1-1.5 mm; the shell 3 is a thin layer mainly made of epoxy resin, thermoplastic resin, reinforcing fibers, a foaming agent and a processing aid, and the thickness of the shell 3 is 0.1-1 mm. After the resin lining is subjected to an electrophoresis foaming process, the porosity generated by the inner core particles is 60-88%, and the porosity generated by the outer shell is 40-75%.

Example 1

Formula of high-foaming sound-insulation resin lining raw material

The inner core comprises the following mass: 600g of epoxy resin, 280g of foaming agent, 10g of foaming auxiliary agent, 250g of plasticizer, 20g of inorganic filler, 10g of vulcanizing agent, 20g of foam cell nucleating agent and 10g of water are mixed. The mixed epoxy resin is prepared by adding liquid epoxy resin, solid epoxy resin and solid rubber in a mass ratio of 10:30:8 into a mixing roll and uniformly mixing.

The outer shell comprises the following mass: 300g of epoxy resin, 350g of nitrile rubber, 100g of methacrylonitrile, 30g of carbon fiber, 100g of foaming agent, 1g of foaming auxiliary agent, 10g of vulcanizing agent and 1g of deionized water.

Example 2

The preparation method of the high-foaming sound insulation resin lining comprises the following steps:

5) adding the core mixture A2 into a main extruder, adding the shell mixture 2 into an auxiliary extruder, extruding the materials of the main extruder and the auxiliary extruder through a core-shell co-extrusion process, and granulating by a high-speed granulator to obtain double-layer core-shell particles with a double-layer core-shell structure;

6) and (3) placing the double-layer core-shell particles into a blanking container of an extruder, blanking into a die, pressing and standing for 20-40 min, extruding and cutting into a required shape to obtain the high-foaming sound-insulation resin lining.

Wherein, in the step 6), the pressing environment is as follows: the temperature is 30-45 ℃, the pressing pressure is 0.2-0.5 Pa, and the pressing time is 50-90 s; the set pressing parameters enable the resin linings to be mutually bonded in a surface micro-melting state without damaging the integral honeycomb structure, and the formability is good.

Example 3

Formula of high-foaming sound-insulation resin lining raw material

The inner core comprises the following mass: 1800g of epoxy resin, 400g of foaming agent, 100g of foaming auxiliary agent, 450g of plasticizer, 50g of inorganic filler, 20g of vulcanizing agent, 50g of foam cell nucleating agent and 100g of water are mixed.

The mixed epoxy resin is prepared by adding liquid epoxy resin, solid epoxy resin and solid rubber in a mass ratio of 35:65:20 into a mixing roll and uniformly mixing.

The outer shell comprises the following mass: 600g of epoxy resin, 750g of nitrile rubber, 250g of methacrylonitrile, 120g of carbon fiber, 250g of foaming agent, 20g of foaming auxiliary agent, 30g of vulcanizing agent and 30g of deionized water.

Example 4

Formula of high-foaming sound-insulation resin lining raw material

The inner core comprises the following mass: 1800g of mixed epoxy resin, 400g of azodicarbonamide, 100g of zinc oxide, 450g of hydroxyl silicone oil, 50g of calcium carbonate, 20g of ammonium sulfide, 50g of nano calcium carbonate and 100g of water.

The mixed epoxy resin is prepared by adding liquid epoxy resin, solid epoxy resin and solid rubber in a mass ratio of 10:30:8 into a mixing roll and uniformly mixing.

The outer shell comprises the following mass: 600g of epoxy resin, 750g of nitrile rubber, 250g of methacrylonitrile, 120g of carbon fiber, 250g of azodicarbonamide, 20g of zinc oxide, 30g of ammonium sulfide and 30g of deionized water.

Prepared by the preparation method described in example 2.

Example 5

Formula of high-foaming sound-insulation resin lining raw material

The inner core comprises the following mass: 900g of mixed epoxy resin, 300g of azodicarbonamide, 76g of zinc oxide, 308g of hydroxyl silicone oil, 31g of calcium carbonate, 12g of ammonium sulfide, 25g of nano calcium carbonate and 100g of water.

The outer shell comprises the following mass: 500g of epoxy resin, 440g of nitrile rubber, 200g of methacrylonitrile, 85g of carbon fiber, 200g of azodicarbonamide, 13.1g of zinc oxide, 18g of ammonium sulfide and 20g of deionized water.

Prepared by the preparation method described in example 2.

Example 6

Formula of high-foaming sound-insulation resin lining raw material

The outer shell comprises the following mass: 500g of epoxy resin, 440g of nitrile rubber, 300g of polyurethane resin, 200g of methacrylonitrile, 85g of carbon fiber, 200g of azodicarbonamide, 13.1g of zinc oxide, 18g of ammonium sulfide and 20g of deionized water.

Prepared by the preparation method described in example 2.

Example 7

A nylon skeleton as shown in fig. 2 is used for installing a high foaming soundproof resin liner, so that the resin liner is better fixed on a vehicle interior panel. Specifically, the nylon skeleton has panel 2 of elasticity buckle 1 for one side, the cross-sectional shape phase-match of the cavity of installation position in 2 shapes of panel and the vehicle stand, the front side of panel 2 is equipped with a plurality of fixed column 3, be equipped with spacing groove 4 above the fixed column 3, the nylon skeleton is still including inserting spacing post 5 in

spacing groove

4, 5 top sides of spacing post are equipped with two at least rectangular form support bars 6, support bar 6 is linear type or radial distribution at spacing post top side.

The diameter of the support strip 6 is 100-1000 mu m; the length of the supporting strip 6 is 2-20 mm.

The inside wall of the limiting groove 4 is provided with a barb groove part 40, and the outside wall of the limiting column 5 is provided with a barb body 50 matched with the barb groove part 40. When the limiting column is used, the limiting column is inserted into the limiting groove, so that the barb body of the limiting column is just buckled into the barb groove part, and then the limiting column is fixed.

The limiting column 5 is prepared by mixing a polyamide fiber material and a thermoplastic resin in a mixing ratio of 1-10: 1; the thermoplastic resin comprises one or more of polyethylene, polyethylene copolymer, soft polyvinyl chloride and thermoplastic elastomer.

When the foaming layer is subjected to electrophoretic foaming expansion, the supporting bars are pushed to be outwards supported by expansion to form longitudinal or oblique supports, so that the rigidity and the mechanical strength of the foaming layer are improved.

Example 7

On the basis of embodiment 7, the support bar is optimized and improved by the present example.

As shown in fig. 3, part of the support bars 6 are tapered support bars 60 with diameters gradually decreasing from inside to outside, and the diameters of different tapered support bars 60 at the same length position are different; the supporting bars 60 are strip-shaped structures with different lengths, as shown in fig. 4A and 4B.

The supporting bars have different diameters, so that the outward extending angles of the supporting bars are different when the supporting bars are subjected to the expansion thrust of the foaming layer, and the supporting bars form supports with different inclined planes; and the structure of the supporting strips with different lengths ensures that the supporting strips are more uniformly distributed in the three-dimensional structure surface of the foaming layer.

Comparative example 1

The resin lining raw material comprises the following mass: 900g of mixed epoxy resin, 300g of azodicarbonamide, 76g of zinc oxide, 308g of hydroxyl silicone oil, 31g of calcium carbonate, 12g of ammonium sulfide, 25g of nano calcium carbonate and 100g of water.

The preparation method comprises the following steps:

1) adding inorganic filler into the mixed epoxy resin, and continuously and uniformly mixing to obtain a mixture A1;

2) adding a foaming agent and a foaming accelerant into the mixture A1, continuously and uniformly mixing, then adding a vulcanizing agent and a foam cell nucleating agent, and continuously and uniformly mixing to obtain a resin lining;

3) and (3) placing the resin lining material into a blanking container of an extruder, blanking into a mold, pressing and standing for 20-40 min, extruding and cutting into a required shape to obtain the high-foaming sound insulation resin lining.

Comparative example 2

The resin lining raw material comprises the following mass: 500g of epoxy resin, 440g of nitrile rubber, 200g of methacrylonitrile, 85g of carbon fiber, 200g of azodicarbonamide, 13.1g of zinc oxide, 18g of ammonium sulfide and 20g of deionized water.

The preparation method comprises the following steps:

1) adding epoxy resin and nitrile rubber into an internal mixer for uniform internal mixing, then adding a foaming agent, a foaming auxiliary agent and a vulcanizing agent for continuous uniform internal mixing to obtain a mixture B1;

2) mixing methacrylonitrile and carbon fibers, adding deionized water, uniformly stirring, adding the mixture B1, and continuously and uniformly mixing to obtain a resin lining;

1. Pore Performance test

Testing the porosity and the pore diameter of the high-foaming sound-insulation resin lining:

resin liners were prepared according to the formulations of example 5, example 6, comparative example 1 and comparative example 2, set as sample group 1, sample group 2, sample group 3 and sample group 4, respectively.

And (3) porosity testing: determination of Density d before foaming for group 1,

group

2, 3 and 4₀And the density d of the foam obtained after foaming_t(ii) a Wherein, the foamed rubber obtained after foaming judges the core body and the shell body according to the internal pore space and the grain (the judgment standard is that the core body has more holes and is in a discontinuous discrete state, the shell body has fewer holes and is in a continuous multidimensional structure) to cut sample blocks, and the core body density and the shell body density are measured by adopting a universal foaming material density measuring method; each sample set measures 20 sample blocks corresponding to the core and the shell respectively,and an average value is taken.

Wherein the foaming process of the foaming glue is as follows: and respectively placing the resin lining samples (100 multiplied by 80 multiplied by 5mm) of each sample group in a constant-temperature oven at 180 ℃ by using a drainage method, baking for 20 minutes, taking out, and cooling to room temperature to obtain the resin lining material.

Average pore diameter test: placing the sample slices foamed by the sample group 1, the sample group 2, the sample group 3 and the sample group 4 on a microscope stage, marking a core body and a shell body part in foaming rubber (marking standard: the core body has more holes and is in a discontinuous discrete state, the shell body has fewer holes and is in a continuous multi-dimensional structure), moving a measuring scale to measure the maximum horizontal diameter of each foaming hole through which the core body and the shell body pass, respectively measuring 50 foam holes corresponding to the core body and the shell body by each sample group, and calculating the range values of the maximum pore diameter and the minimum pore diameter of the core body and the shell body.

The results are shown in table 1 below:

through visual observation, the pore size distribution structures of the sample group 1 and the sample group 2 are arranged in a similar honeycomb structure, continuous pores on the honeycomb edge are smaller, partial pores separated by the honeycomb edge are larger, and the whole pores are in a continuous communicated state.

2. Physical and sound insulation and absorption performance test

Resin liners were prepared according to the formulations of example 5, example 6, comparative example 1 and comparative example 2, set as sample set 1, sample set 2, sample 3 and sample 4, respectively. And (3) keeping the products of the sample groups 1-4 at the temperature of 140-215 ℃ for 30 minutes for foaming, and foaming to form a final foamed filling block.

The foamed filling block materials of sample groups 1-4 were tested for physical properties according to standard test methods and for sound insulation according to the test method of GB/T19889.2-2002. The test results are shown in table 2 below.

Table 2 physical and sound insulation performance test results

As can be seen from table 2 above, the high-foaming sound-insulating resin liner of the present invention has good sound absorption and physical properties. As can be seen from the results of the porosity test in table 2 in combination with table 1, the resin liners of the

sample groups

1 and 2 have a sound insulation effect with a larger frequency range noise due to the porosity and the pore size, so that the noise at various frequencies can be isolated more easily, and the sound insulation performance is excellent; while the resin liners of sample sets 3 and 4 had poor sound insulation at high frequencies.

A4206 model impedance tube is adopted, the principle of measuring the sound absorption and energy absorption of materials by the impedance tube is based on a transfer function, a broadband steady-state random signal is decomposed into an incident wave pi and a reflected wave pr, the size of the pi and the pr is determined by sound pressure measured by two microphones arranged on the tube, and the sound absorption coefficients of a sample group 1, a sample group 2, a sample group 3 and a sample group 4 after foaming are calculated. The test results are shown in table 3 below.

TABLE 3 Sound absorption Property test results

As shown in table 3, the sound absorbing material sound absorption coefficients of the sample group 1 and the sample group 2 are in an increasing trend with the increase of the frequency, and have a good sound absorbing effect in a high frequency range, and have a more stable and wider frequency sound absorbing effect compared with the sample group 3 and the sample group 4.

It should be noted that, in this document, the term "comprises/comprising" or any other variation thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or apparatus that comprises a list of elements does not include only those elements but also other elements not expressly listed or inherent to such process, method, article or apparatus.

The preferred embodiments and examples of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the embodiments and examples described above, and various changes can be made within the knowledge of those skilled in the art without departing from the concept of the present invention.

Claims

1. The high-foaming sound insulation resin lining is characterized in that the resin lining is formed by pressing double-layer core shell particles, the double-layer core shell particles comprise an inner-layer core body and an outer-layer shell body, the core body is particles mainly prepared by mixing epoxy resin, nitrile rubber, a foaming agent and a processing aid, and the particle size of the core body is 0.1-1.5 mm; the shell is a thin layer mainly made of epoxy resin, thermoplastic resin, reinforcing fibers, a foaming agent and a processing aid, and the thickness of the shell is 0.1-1 mm.

2. The highly foamed sound-insulating resin liner according to claim 1, wherein the porosity of the inner core particles after foaming is 60 to 88%, and the porosity of the outer shell after foaming is 40 to 75%.

3. The high-foaming sound-insulation resin liner as recited in claim 1, wherein the core is made of the following raw materials in parts by mass:

4. The high foaming sound insulation resin liner according to claim 3, wherein the mixed epoxy resin is prepared by mixing the following raw materials in parts by mass: 10-35 parts of liquid epoxy resin, 30-65 parts of solid epoxy resin and 8-20 parts of solid rubber.

5. The high foaming acoustical resin liner of claim 1 wherein said shell is made from the following raw materials in parts by weight:

6. The high foaming soundproof resin liner according to claim 5, wherein the raw material of the shell further comprises 25 to 40 parts of a polyurethane resin;

the core body is specifically prepared from the following raw materials in parts by mass: 90 parts of mixed epoxy resin, 30 parts of azodicarbonamide, 7.6 parts of zinc oxide, 30.8 parts of hydroxyl silicone oil, 3.1 parts of calcium carbonate, 1.2 parts of ammonium sulfide, 2.5 parts of nano calcium carbonate and 10 parts of water;

the shell is specifically prepared from the following raw materials in parts by mass: 50 parts of epoxy resin, 44 parts of nitrile rubber, 30 parts of polyurethane resin, 20 parts of methacrylonitrile, 8.5 parts of carbon fiber, 20 parts of azodicarbonamide, 1.31 parts of zinc oxide, 1.8 parts of ammonium sulfide and 2 parts of deionized water.

7. A method for preparing the high foaming soundproof resin liner according to claim 4, the method comprising

1) Adding liquid epoxy resin, solid epoxy resin and solid rubber into an internal mixer for banburying until the epoxy resin, the solid epoxy resin and the solid rubber are melted uniformly to obtain mixed epoxy resin, and then adding inorganic filler into the mixed epoxy resin for continuous banburying uniformly to obtain a mixture A1;

3) adding the epoxy resin and the nitrile rubber into an internal mixer for banburying until the epoxy resin and the nitrile rubber are uniformly melted, and then adding the foaming agent, the foaming auxiliary agent and the vulcanizing agent for continuous banburying to be uniform to obtain a mixture B1;

8. The nylon skeleton of application any one of claims 1-6 with high foaming sound insulation resin lining, characterized in that, nylon skeleton (1) is the panel (2) that one side has the elasticity buckle, panel (2) shape and the cross-sectional shape of the cavity of vehicle pillar middle erection site match, the front side of panel (2) is equipped with a plurality of fixed column (3), be equipped with on the fixed column (3) and limit the groove (4), nylon skeleton (1) still includes and inserts spacing post (5) in the limit groove (4), spacing post (5) top side is equipped with two rectangular linear type support bars (6) at least, support bar (6) are at spacing post top side in the form of radial distribution.

9. The nylon skeleton of the high-foaming soundproof resin liner according to claim 8, wherein the supporting strips (6) have a diameter of 100 to 1000 μm; the length of the supporting strip (6) is 2-20 mm;

the limiting groove is characterized in that a barb groove part (40) is arranged on the inner side wall of the limiting groove (4), and a barb body (50) matched with the barb groove part (40) is arranged on the outer side wall of the limiting column (5).

10. The nylon skeleton of the high-foaming soundproof resin liner according to claim 8, wherein the stopper pillar (5) is made by mixing a polyamide fiber material and a thermoplastic resin at a mixing ratio of 1-10: 1; the thermoplastic resin comprises one or more of polyethylene, polyethylene copolymer, soft polyvinyl chloride and thermoplastic elastomer;

part of the support bars (6) are conical support bars (60) with the diameters gradually reduced from inside to outside, and the diameters of the conical support bars (60) at the same length position are different; the supporting strips (60) are of strip-shaped structures with different lengths.