CN100351301C - Foaming sheet composition for reducing vehicle noise and method for making same - Google Patents
Foaming sheet composition for reducing vehicle noise and method for making same Download PDFInfo
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- CN100351301C CN100351301C CNB2004100423341A CN200410042334A CN100351301C CN 100351301 C CN100351301 C CN 100351301C CN B2004100423341 A CNB2004100423341 A CN B2004100423341A CN 200410042334 A CN200410042334 A CN 200410042334A CN 100351301 C CN100351301 C CN 100351301C
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Abstract
The present invention relates to a sheet composition for reducing vehicle noise, which comprises a highly foaming composition and an adhesive composition, wherein the highly foaming composition comprises polybutadiene rubber, thermoplastic rubber, a filling agent, process oil, a curing agent and a foaming agent; the adhesive composition can cause the sheet to be stuck to an oily surface coated with anticorrosion oil, and comprises butyl rubber, styrene-butadiene rubber, adhesive resin, a curing agent, etc. The present invention also relates to a foaming sheet comprising a highly foaming layer 1 and an adhesive layer 2 which can be stuck to the oily surface.
Description
Technical field
The present invention relates to a kind of foam sheet composition, this sheet material can be used for suppressing and preventing the engine noise of the interior generation of car body in the motor racing process and the noise of advancing, more particularly, the automobile foam sheet that the present invention relates to the foam sheet composition and make by said composition, wherein, described sheet material is easy to make, is easy to fit on the sheet material of automobile and has fabulous effect.
Background technology
As shown in Figure 2, conventional reducing vehicle noise comprises following structure with foam sheet: compressed sponge 30 is laminated to the upper strata 10 that can highly foam and can hangs down between the following adhesive layer 20 of foaming or non-foaming, and the described lower surface of adhesive layer 20 is down protected by interleaving paper.
But, in this case, the material of being made up of the upper strata 10 that can highly foam and the low lower floor 20 that foams comprises as elastomeric terpolymer EP rubber (EPDM) or styrene butadiene rubbers, because they have lower rubber viscosity, low frothing percentage and low expansion ratio, therefore can not carry out the height foaming by described layer 10 and 20 material of forming, and foaminess is relatively poor.Therefore, in order to obtain big and thick foam sheet, so that make this foam sheet be full of the cavity of automobile fully and can not break away from or slide from automobile board, the compressed sponge that is laminated between described upper strata 10 and the lower floor 20 should have bigger volume.
Therefore, in order to produce conventional foam sheet, need to increase raw-material consumption and production cost, and because this production process is complicated, labor cost can increase also, and can not carry out mass production at short notice.
Summary of the invention
The objective of the invention is to improve the shortcoming that forms reducing vehicle noise's usefulness foam sheet that reducing vehicle noise obtains with the composition of foam sheet and by the said composition moulding.And, the purpose of this invention is to provide reducing vehicle noise's foam sheet, this foam sheet comprises highly foaming layer and adhesive layer, described can the height foaming layer obtaining by the composition molding that has foaming power, described adhesive layer is obtained and can be gluing in the general surface and the oiliness surface of automobile by the composition molding with strong adhesive power and strong rubber viscosity, the tackiness of the composition in the described adhesive layer even this foam sheet is sticked to applied the oiliness surface of oil as rust preventive oil in the car body.
In other words, the object of the present invention is to provide reducing vehicle noise's foam sheet as described below: different with above-mentioned existing reducing vehicle noise foam sheet, although foam sheet of the present invention is not highly inserting compressed sponge between foaming layer and the adhesive layer for the volume that increases foam sheet, have high foaming power, strong rubber viscosity and strong adhesive power.
Reducing vehicle noise of the present invention with foam sheet comprise by the composition molding that has foaming power obtain can the height foaming layer and by in addition on the oiliness surface, also have an adhesive layer that the composition molding of fabulous tackiness and adhesive power obtains, when described foam sheet is applied to the car body cavity, do not need to adopt special technology or equipment to make its adhesion and curing, they can be adhesive in the cavity of car body when the assembling car body, then, when described car body passes baking oven when solidifying its lacquered surface, by means of the heat in the baking oven, described foam sheet can successfully foam and solidify (drying).
Therefore, high foaming power by means of described foam sheet, described adherent foam sheet can be full of the cavity of automobile fully, and, after described sheet material foaming, because formed the blind hole cave in the described sheet material, so this car is had fabulous noise reduction, the weight of this car can not rise significantly yet simultaneously.
In addition, by the effect of described adhesive layer, described sheet material has strong rubber viscosity and strong adhesive power, also has adhesive power closely even be coated with oil in automobile as this sheet material on the oiliness surface of rust preventive oil.
Below with reference to accompanying drawing described formation reducing vehicle noise is described in detail with the composition of foam sheet with by the foam sheet that said composition forms.
Description of drawings
What Fig. 1 represented is the cross-sectional view of reducing vehicle noise of the present invention with foam sheet.
What Fig. 2 represented is the cross-sectional view of conventional noise reduction with foam sheet.
Embodiment
The reducing vehicle noise that is used for of the present invention comprises with the composition of foam sheet:
A kind of highly foaming composition with high foaming power,
Sneaked into polybutadiene rubber in the said composition successively as 5～10 weight % of substrate polymer; The thermoplastic elastomer of 18～30 weight %, as the lime carbonate of 10～20 weight % of weighting agent and the lime carbonate of 20～30 weight % through coating; Carbon black as 0.5～1 weight % of tinting material; Cellmic C 121 as 6～10 weight % of whipping agent; Urea as 3～6 weight % of blowing promotor; Zinc oxide as 3～6 weight % of reaction promotor; Stearic acid as 0.5～1 weight % of processing aid; As solidifying agent and consumption be 2.0～4.0 weight % be selected from TMTD or tetramethyl-thiuramsulfides or 2-(4-morpholine dithio)-benzothiazole (any or any two material of 2-(4-morpolynodithio)-benzothiazole); And as the aromatic series process oil of 30～60 weight % of process oil;
Even and the tackiness composition that on the oiliness surface of sheet material, also has strong rubber viscosity and strong adhesive power, the styrene butadiene rubbers of having mixed 15～25 weight % in the said composition, the isoprene-isobutylene rubber of 10～20 weight %, the hydrogenate hydrocarbon of 2～4 weight %, the zinc oxide of 1～2 weight %, as 2 of 0.5～1 weight % of antioxidant, 2,4-trimethylammonium-1,2-dihydro benzoquinones, the lime carbonate of 50～70 weight %, 0.5 the ultramarine pigment of～1.0 weight %, the polybutene of 10～20 weight %, the isoprene resin of 10～20 weight % and be the sulphur that is selected from of 1.5～3 weight % as solidifying agent and consumption, any or any two material to quinhydrones dioxime or dibenzothiazyl disulfide.
Even respectively the highly foaming composition with high foaming power of gained is extruded by the double end forcing machine simultaneously with the tackiness composition that also has strong rubber viscosity and strong adhesive power on the oiliness surface of sheet metal; perhaps extrude respectively by independent two extruders; be that laminate thickness is that the top of 2～8mm can height foaming layer 1 on the bottom adhesive layer 2 of 1.0～1.5mm at the thickness of gained then; described adhesive layer even on the oiliness surface, also have tackiness and adhesivity; obtaining comprehensive (always) thickness thus is reducing vehicle noise's foam sheet of 3.0～9.5mm, and described bottom adhesive layer 2 is protected so that store by interleaving paper.
When the foam sheet with gained is applied to cavity between the two-layer sheet material of automobile; to protect the interleaving paper of described bottom adhesive layer 2 to remove earlier; make described sheet material gluing and be full of cavity between dual sheet material such as car post sheet material, wheel house sheet material, roof rail sheet material and roof (roofhead) sheet material then; at the gluing automobile of described sheet material (car body) when being used to solidify the baking oven of car body painted surface; under the effect of the heat in baking oven; the described sheet material that can highly foam will foam and solidify, thereby is full of the cavity between the described dual sheet material.
Therefore, described foam sheet is filled by foaming between dual automobile board, when the automobile of described foam sheet has been filled in driving, the noise of advancing is tackled to the transmission of car body and roof because engine noise and for example tire noise and wind are made an uproar etc., so can control or resonance that sound reduction causes.
In the used above-mentioned composition of the sheet material that can highly foam of the present invention, if the addition of described polybutadiene rubber is less than 5 weight %, owing to be difficult to form the blind hole cave, normal sheet material might can't be formed, if and described addition is more than 10 weight %, because the foaming of described sheet material is suppressed, thereby its frothing percentage might descend.
If the addition of described thermoplastic elastomer is less than 18 weight %, then this sheet material might can't foam, and if described addition more than 30 weight %, then can't improve the hardness of this sheet material.
If the addition as the described lime carbonate of weighting agent is less than 10 weight %, then said composition blend normally, if and described addition is more than 20 weight %, owing to increased the weight of said composition, thereby the flowability of the sheet material that is obtained by the said composition moulding will exceed normal range.
If described lime carbonate through coating is less than 20 weight %, then because the moulding normally of this sheet material, thereby easy deformation when the foaming of this sheet material and when solidifying, if and this material is more than 30 weight %, the hardness of this sheet material will rise, its frothing percentage will descend, and wherein, using described these two kinds of weighting agents is in order to keep corresponding hardness and make it be easy to longitudinally foam when sheet material to foam.
If be less than 0.5 weight % or more than 1.0 weight % as the described carbon black of tinting material, then because described tinting material can't normally disperse, thereby described sheet material can not normally foam.
If the described Cellmic C 121 as whipping agent is less than 6 weight %, the frothing percentage of this sheet material will descend, and if described whipping agent more than 10 weight %, flow out easily during the foaming of this sheet material.
If the described urea as blowing promotor is less than 3 weight %, the frothing percentage of this sheet material will descend, if and described blowing promotor is more than 6 weight %, because the decomposition before this sheet material solidifies of described whipping agent, thereby described sheet material can not foam normally.
If the described zinc oxide as reaction promotor is less than 3 weight %, then its reaction promoter action will die down, and if described reaction promotor more than 6 weight %, then its reaction promoter action will can further not strengthen.
If the described stearic acid as processing aid is less than 0.5 weight %, then its be close to invalid, and if described processing aid more than 1 weight %, then its treatment effect can die down on the contrary.
If described solidifying agent is less than 2 weight %, then this sheet material can't solidify under corresponding temperature, and if described solidifying agent more than 40 weight % because this sheet material over cure before foaming, the foaming effect of this sheet material will be suppressed or descend.
If described aromatic series process oil is less than 30 weight %, working efficiency will descend, if and its consumption is more than 60 weight %, can reduce the viscosity of described sheet material (composition), increase its flowability, to such an extent as to the sheet material of foaming can't be full of the cavity between this dual sheet material of automobile fully, therefore can not tackle noise effectively.
Equally, be used for the described sizing composition of adhesive layer 2 of the present invention, if the addition of described styrene butadiene rubbers is less than 15 weight %, then 2 pairs of described highly adhesive powers of foaming layer 1 of this adhesive layer might descend, if and described addition is more than 25 weight %, because the tensile strength of described layer 2 increases excessively, working efficiency will descend.
If described isoprene-isobutylene rubber is less than 10 weight %, tensile strength and elongation can not get improving, if described isoprene-isobutylene rubber is more than 20 weight %, because the tensile strength of this sheet material increases excessively, therefore this sheet material can shrink behind the extrusion sheet, thereby the specification of this sheet material can change.
If hydrogenate hydrocarbon is less than 2 weight %, after this sheet material solidified, its adhesive power descended, if described hydrogenate hydrocarbon more than 4 weight %, this sheet material tackiness at room temperature will descend.
If the described zinc oxide as reaction promotor is less than 1 weight %, the reaction promoter action will die down, if described reaction promotor more than 2 weight %, described reaction promoter action can further not strengthen yet.
If described 2,2 as antioxidant, 4-trimethylammonium-1,2-dihydro benzoquinones is less than 0.5 weight %, its antioxygenation will die down, if described antioxidant more than 1 weight %, As time goes on this antioxidant will be diffused into the surface of adhesive layer 2 gradually.
If described lime carbonate is less than 50 weight %, because the perviousness of this sheet composition might increase, thereby its original-shape will change, if described lime carbonate is more than 70 weight %, the hardness of this sheet material will rise, and in addition, its initial tackiness will descend.
If described ultramarine pigment is less than 0.5 weight % or more than 1.0 weight %, this sheet material can't obtain suitable color.
If described polybutene is less than 10 weight %, the initial tackiness of this sheet material will descend, and polybutene as described is more than 20 weight %, and the flowability of this sheet material will increase.
If described isoprene resin is less than 10 weight %, initial tackiness and adhesive power after this sheet material solidifies will descend, if described isoprene resin more than 20 weight %, the flowability of this sheet material will increase.
If as the described sulphur of solidifying agent, quinhydrones dioxime and dibenzothiazyl disulfide are less than 1.5 weight %, solidification process will become slowly or can not normally finish, if described solidifying agent is more than 3 weight %, then this sheet material will reduce stability in storage because of over-curing.
If form described reducing vehicle noise with the described thickness of the adhesive layer 2 of foam sheet less than 1.0mm, the tackiness of this sheet material and adhesive power will descend, if described thickness greater than 1.5mm, the flowability of this sheet material will increase because of adhesive layer is blocked up.
If form described reducing vehicle noise with the described thickness of the foaming layer 1 of foam sheet less than 2mm, will can't form foam sheet because of thickness is too thin, if described thickness greater than 8mm, will cause frothing percentage to descend because of foaming layer is blocked up.
Industrial applicibility
In making the process of automobile, reducing vehicle noise's foam sheet of being made by composition of the present invention Can be applicable between the suitable dual sheet material in the automobile and need not in its application process, to use separately Other equipment, the automobile that will adopt then this sheet material is by being used for solidifying the automotive paints surface Heated oven, under the effect of the heat in baking oven, these sheet materials are automatic foaming and curing, from And car post, driver's cabin, roof rail, roof and the bottom girder side (sill side) etc. that are full of automobile fully are two Therefore cavity between the heavy sheet material, produces in the space of the car body that is full of by described foam sheet Noise will greatly reduce.
Claims (4)
1. be used for the composition of reducing vehicle noise with foam sheet, described composition comprises:
A kind of foaming composition has been sneaked into the polybutadiene rubber as 5～10 weight % of substrate polymer successively in the said composition; The thermoplastic elastomer of 18～30 weight %; As the lime carbonate of 10～20 weight % of weighting agent and the lime carbonate of 20～30 weight % through coating; Carbon black as 0.5～1.0 weight % of tinting material; Cellmic C 121 as 6～10 weight % of whipping agent; Urea as 3～6 weight % of blowing promotor; Zinc oxide as 3～6 weight % of reaction promotor; Stearic acid as 0.5～1 weight % of processing aid; As solidifying agent and consumption is any or any two material that is selected from TMTD or tetramethyl-thiuramsulfides or 2-(4-morpholine dithio)-benzothiazole of 2.0～4.0 weight %; And as the aromatic series process oil of 30～60 weight % of process oil;
And tackiness composition, the styrene butadiene rubbers of having mixed 15～25 weight % in the said composition, the isoprene-isobutylene rubber of 10～20 weight, the hydrogenate hydrocarbon of 2～4 weight %, the zinc oxide of 1～2 weight %, as 2 of 0.5～1 weight % of antioxidant, 2,4-trimethylammonium-1,2-dihydro benzoquinones, the lime carbonate of 50～70 weight %, 0.5 the ultramarine pigment of～1.0 weight %, the polybutene of 10～20 weight %, the isoprene resin of 10～20 weight % and be the sulphur that is selected from of 1.5～3 weight % as solidifying agent and consumption, any or any two material to quinhydrones dioxime or dibenzothiazyl disulfide.
2. prepare the method for reducing vehicle noise with foam sheet; it is characterized in that: respectively described foaming composition of claim 1 and described tackiness composition are extruded simultaneously by the double end forcing machine; perhaps extrude respectively by independent two extruders; obtain foaming layer (1) and adhesive layer (2) then respectively; then that top foaming layer (1) and bottom adhesive layer (2) is laminated together; thereby obtain foam sheet, protect described bottom adhesive layer (2) with interleaving paper.
3. the method for preparing reducing vehicle noise with foam sheet as claimed in claim 2, wherein, the thickness of described top foaming layer (1) is 2～8mm, and the thickness of described bottom adhesive layer (2) is 1.0～1.5mm, and the total thickness of the sheet material that is formed by described layer (1) and layer (2) is 3.0～9.5mm.
4. reducing vehicle noise's foam sheet that comprises top foaming layer (1) and bottom adhesive layer (2), wherein said top foaming layer (1) and bottom adhesive layer (2) are respectively by described foaming composition of claim 1 and tackiness preparation of compositions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100423341A CN100351301C (en) | 2004-05-20 | 2004-05-20 | Foaming sheet composition for reducing vehicle noise and method for making same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100423341A CN100351301C (en) | 2004-05-20 | 2004-05-20 | Foaming sheet composition for reducing vehicle noise and method for making same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1699456A CN1699456A (en) | 2005-11-23 |
| CN100351301C true CN100351301C (en) | 2007-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100423341A Expired - Fee Related CN100351301C (en) | 2004-05-20 | 2004-05-20 | Foaming sheet composition for reducing vehicle noise and method for making same |
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| CN (1) | CN100351301C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101392075B (en) * | 2007-09-21 | 2010-08-25 | 丹阳市金晟医用橡塑制品有限公司 | Formula for synthesizing rubber injection member for disposable infusion device and method for producing the same |
| CN101781415A (en) * | 2010-03-15 | 2010-07-21 | 尚盟运动用品(惠阳)有限公司 | Styrene butadiene rubber sponge |
| CN102432909B (en) * | 2011-08-21 | 2013-07-24 | 王若愚 | Activating agent of foaming agent and preparation method of activating agent |
| CN104250532B (en) * | 2014-09-25 | 2016-05-18 | 张家港爱科思汽车配件有限公司 | The expansion type film that expands for a kind of automobile |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01249845A (en) * | 1988-03-30 | 1989-10-05 | Japan Synthetic Rubber Co Ltd | Rubber composition |
| CN1306030A (en) * | 2000-01-18 | 2001-08-01 | 江西省励远化工科技实业公司 | Shock-damping rubber pad and its preparing process |
-
2004
- 2004-05-20 CN CNB2004100423341A patent/CN100351301C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01249845A (en) * | 1988-03-30 | 1989-10-05 | Japan Synthetic Rubber Co Ltd | Rubber composition |
| CN1306030A (en) * | 2000-01-18 | 2001-08-01 | 江西省励远化工科技实业公司 | Shock-damping rubber pad and its preparing process |
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| Publication number | Publication date |
|---|---|
| CN1699456A (en) | 2005-11-23 |
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Granted publication date: 20071128 Termination date: 20180520 |