CN1718896A - Sound absorbing material for automobile inside equipment - Google Patents
Sound absorbing material for automobile inside equipment Download PDFInfo
- Publication number
- CN1718896A CN1718896A CNA200410056811XA CN200410056811A CN1718896A CN 1718896 A CN1718896 A CN 1718896A CN A200410056811X A CNA200410056811X A CN A200410056811XA CN 200410056811 A CN200410056811 A CN 200410056811A CN 1718896 A CN1718896 A CN 1718896A
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- China
- Prior art keywords
- absorbing material
- felt
- curing agent
- automotive interior
- interior equipment
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0884—Insulating elements, e.g. for sound insulation for mounting around noise sources, e.g. air blowers
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4209—Inorganic fibres
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/425—Cellulose series
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin series
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
A sound absorbing material for automobile inside equipments, capable of increasing moldability and operational performance of the sound absorbing material circumstance, improving an operation circumstance, reducing unhappiness due to bad smell and bad components generated from the sound absorbing material, is provided. The sound absorbing material for automobile inside equipments is characterised by containing: a felt made by mixing at least one of natural fibers, reused fibers, polyolefin initial fibers and inorganic fibers in a certain proportion, a powder shape curing agent composed of at least one of hexa free phenol, melamine, epoxy, unsaturated polyester, epoxy-polyester and phenol, the curing agent is bonded with and solidifies the felt.
Description
Technical field
The present invention relates to automotive interior equipment sound-absorbing material.
Background technology
In the past, the sound-absorbing material that phenolic resins is used as automotive interior equipment as the resin felt of curing agent, polyurethane foam plastics, PET felt etc.
, there are the following problems for it: phenolic resins is decomposed the accessory substance that produces amine and Ammonia as the resin felt of curing agent hexamine when solidifying, and this accessory substance is harmful; Owing to produce the dust that disperses during operation, make operating environment abominable; Can bring unhappy on the sense organ to the consumer by the harmful components of bad smell that sound-absorbing material sent and generation.
And, to compare with other materials, polyurethane foam plastics weight is big and price is high, produces bioxin when having burning and utilizes difficult shortcoming again.
In addition, when using the PET felt separately, combustibility and sound absorption qualities descend.In order to improve the combustibility of the felt that makes by utilizing fiber again, inweave wool and improve utilizing again to mix in the fibrofelt, but owing to mix and knit the raising that wool causes cost, therefore the problem that exists competitiveness to descend.
In the past, the thermosetting resin that is used as curing agent had epoxy resin and unsaturated polyester (UP), because they are liquid, therefore had the problem of mouldability and operation difference.
Therefore, the automotive interior equipment developed of the applicant with sound-absorbing material can improve its mouldability and operation, in manufacture process, can suppress dust and harmful substance generation, improve operating environment, reduce unhappy on the sense organ that brings to the consumer by the harmful components of bad smell that sound-absorbing material sent and generation.
Summary of the invention
The purpose of this invention is to provide a kind of mouldability and operation that can improve sound-absorbing material, improve operating environment, reduce a kind of automotive interior equipment sound-absorbing material of the unplessantness displeasure of bringing by the harmful components of bad smell that sound-absorbing material sent and generation.
For achieving the above object, automotive interior equipment of the present invention is characterized by with sound-absorbing material and contains: by natural fabric, utilize at least a felt that mixes by a certain percentage of fiber, TPO pristine fibre, fibers and inorganic again; By at least a Powdered curing agent that constitutes among six free phenols (Hexa free phenol), melamine, epoxy resin, unsaturated polyester (UP), epoxy polyester, the phenol epoxy polyester, this curing agent connection is also solidified above-mentioned felt.
Here, material of the present invention preferably is made of the above-mentioned felt of 80～90 weight % and the above-mentioned curing agent of 10～20 weight %.
The proportion of composing of above-mentioned felt is that the total content that utilizes fiber and pristine fibre again that is made of cotton fiber and chemical fibre is 80～90 weight %, and the total content of hemp and inorfil is 10～20 weight %.
The particle diameter of above-mentioned curing agent is distributed as 10～200 μ m, and the average grain diameter size is 20～80 μ m, the dispersiveness in the time of improving above-mentioned curing agent like this and mix with above-mentioned felt, thus can increase adhesive force with felt.
Ammonia composition in above-mentioned curing agent six free phenols is preferably≤and 0.2%.
And the molding thickness of above-mentioned felt is preferably 5～30mm.
The cotton fiber density of above-mentioned felt is 350～2000g/m
2Shi Xiaoguo can be better.
Description of drawings
Fig. 1 and Fig. 2 represent among the embodiment 2 the acoustic absorptivity result of the test to having used the sample that improves phenol resin (six free phenols) to carry out.
The specific embodiment
By the automotive interior equipment of manufacturing of the present invention contain felt with sound-absorbing material and sneak in the felt, connect felt and make the Powdered curing agent of its curing.Here, preferred automotive interior equipment is the felt of 80～90 weight % and the curing agent of 10～20 weight % with the composition proportioning of sound-absorbing material.
Felt is by natural fabric, utilizes fiber, TPO pristine fibre, at least a of fibers and inorganic to mix by a certain percentage again.
Natural fabric preferably adopts cotton, wool, jute, flax, Limonene fiber crops, hemp, sisal, coir fibre etc.
The residue that utilizes fiber preferably to adopt the industrial waste product of polypropylene, polyester, nylon, vinylon etc. again or produce in process of production etc.Thus, utilize the waste product resource, thereby prevent to burn or bury the environmental pollution that is caused, realize not only economizing on resources but also economic effect.
Inorfil can use glass fibre, carbon fiber etc.
Here, account for 60～80 weight %, utilize fiber, TPO (using) fiber and inorfil to account for the mixed formation felt of 20～40 weight % again by natural fabric, effect can be better.Certainly, felt also can be made of single fiber.
In addition, the forming thickness of felt is preferably 5～30mm.If the forming thickness＜5mm of felt, then intensity and sound absorption qualities etc. will descend to some extent; If the forming thickness＞30mm of felt is good with corresponding intensity of thickness and sound absorption qualities, but tack and morphological stability are unreliable, so also bad.Therefore, as automotive interior equipment with the forming thickness of the felt of sound-absorbing material its use preferably in the scope of 5～30mm, effect can be better in the time of particularly in the scope of 10～25mm.
And the cotton fiber density of felt is preferably 350～2000g/m
2If the cotton fiber density＜350g/m of felt
2, sound absorption qualities, intensity, morphological stability will descend to some extent so; If the cotton fiber density＞2000g/m of felt
2, the requirement that sound absorption qualities is high has reached, thereby but because becoming, the weight on the unit are greatly its value as goods has been descended, so also bad.Therefore, the cotton fiber density of felt is preferably at 350～2000g/m
2Scope in, particularly at 400～1500g/m
2Effect can be better in the time of in the scope.
Pulverous curing agent can improve the mouldability and the operation of base material.The preferred consolidation agent is made of at least a institute among six free phenols, melamine, epoxy resin, unsaturated-resin, epoxy polyester, the phenol epoxy polyester, and particularly ammonia content≤0.2% o'clock effect can be better in six free phenols.Here, curing agent is made of single resin.
And the preferred consolidation agent is in 50～200 ℃ of fusions and curing, and effect can be better when 95% o'clock thermal decomposition initial temperature was 170 ℃.
In addition, in order to improve the mixing property of curing agent and felt, the particle diameter of curing agent distributes and preferably distributes in 1～250 mu m range, is 10～200 μ m and average grain diameter size when being 20～80 μ m when particle diameter distributes, and effect can be better.If the particle diameter of curing agent distributes greater than 200 μ m and average grain diameter size greater than 80 μ m, then with felt when mixing because specific gravity difference is big, dispersed bad.
Therefore, with felt when mixing, curing agent has the performance that can stick to the fiber surface that constitutes felt, thereby make dispersed the raising, interfibrous adhesiveness improves during moulding, the dust that disperses and the generation of harmful substance can be in the manufacture process of base material, suppressed, and operating environment can be improved.
Below, will describe with the method for sound-absorbing material make automotive interior equipment by the present invention.
At first, according to the purposes of goods, by a certain percentage with natural fabric, utilize mixing such as fiber, pristine fibre, inorfil again, it is standby to make felt.
Then, in felt, sneak into Powdered curing agent, opening fiber.
Then, the felt after the shredding is solidified in the baking oven of uniform temperature, carry out cooling processing for the shape that keeps felt then.
Chilled felt is cut into article shape, and the felt that will cut out carries out the heating and pressurizing moulding by article shape then, and automotive interior equipment constructed in accordance has so just been finished with the operation of sound-absorbing material.
The result of the test of the automotive interior equipment of the manufacturing according to the present invention with sound-absorbing material is shown below.
At first, by the quantitative analysis to curing agent, the phenol of investigating the reduction of original employed phenol and harmfulness is the content of six free phenols (ammonia composition≤0.2%), during result of the test is listed in the table below.
[table 1] quantitative analysis structure
| The difference classification | Original phenol | Six free phenols |
| Phenol | Less than 0.8% | Less than 0.2% |
By granularmetric analysis to curing agent, the size of optimum powdex when studying it and mixing with felt, and result of the test listed in the table 2.
The granularmetric analysis of [table 2] curing agent is unit as a result: μ m
| Classification | Original phenol | Six free phenols | Epoxy polyester |
| Mean value | 49.07 | 52.38 | 36.83 |
| Median | 47.08 | 46.19 | 26.23 |
| S.D. | 31.31 | 34.06 | 29.56 |
Table 3 expression be with test method that sound-absorbing material carried out to automotive interior equipment.
Embodiment 1
According to the test method of table 3, respectively the felt that has mixed the variety classes curing agent is tested, and with the results are shown in Table 4.The cotton fiber density of the test specimen in the table 4 is 750g/m
2And its molding thickness is 10mm, and preheat temperature is 280～350 ℃, and be 10～45 seconds preheating time.
[table 3] automotive interior equipment test method of sound-absorbing material
| Classification | Test method | Well | |
| Acoustic absorptivity | 1000Hz | Measure and estimate acoustic absorptivity according to KS F 2805-1972 " acoustic absorptivity assay method ".Thickness is 10mm, and cotton fiber density is 900 ± 180g/m 2 | 〉=10 |
| 2000Hz | 〉=25 | ||
| 3150Hz | 〉=40 | ||
| Flammable | Estimate according to KS F 9152-1978 " the flammability test method of the indoor organic material of automobile ". | 〉=80mm/min does not burn | |
| Morphological stability | The face shaping evaluation of goods | The outward appearance of goods and shape do not change | |
| Numerical stability | The thickness measurement of goods | Products thickness ± 10 in | |
[table 4] cotton fiber density is 750g/m
2, when thickness is 10mm, the result of the test of different curing agent
| Classification | Original phenol | Six free phenols | Epoxy polyester | |
| Acoustic absorptivity | 1000Hz | Well | Well | Well |
| 2000Hz | Well | Well | Well | |
| 3150Hz | Well | Well | Well | |
| Flammable | Well | Well | Well | |
| Morphological stability | Well | Well | Well | |
| Numerical stability | Well | Well | Well | |
Embodiment 2
Fig. 1 and Fig. 2 are the acoustic absorptivity result of the tests to having used the sample that improves phenol resin (six free phenols) to carry out; Be to be the varied in thickness of curing agent content when being 10～20 weight %, the acoustic absorptivity result that the cotton fiber variable density records according to resin content.
1500,1800,2000g/m wherein Fig. 1 is the acoustic absorptivity result of the test that records of the different cotton fiber density when being 18mm according to a thickness (cotton fiber density:
2); Fig. 2 is to be 1500g/m according to cotton fiber density
2The time different-thickness and 8,10,12,14,16,18 the acoustic absorptivity result that records (thickness:, 20mm).
In Fig. 1 and Fig. 2, be the result who adopts vertical incidence acoustic absorptivity testing machine (two microphone impedances are measured pipe), tests according to ASTM E 1050 test methods.Above-mentioned sample is at the top and bottom of felt lamination nonwoven fabric (100g/m
2) and the result that tests.
Comparative example 1
Table 5 expression be phenol that original phenol and harmfulness are lowered, the i.e. result of six free phenol quantitative analyses.As shown in table 5, relatively the composition that can be detected in phenol is the content of phenol, formaldehyde, hexamethylene-tetramine, is listed in the table.
[table 5] quantitative analysis results
| Classification | Original phenol | Six free phenols |
| Phenol | Less than 0.8% | Less than 0.2% |
| Formaldehyde | Less than 0.05% | Do not have |
| Hexamethylene-tetramine | 8.8～9.2％ | 4.5～6％ |
Comparative example 2
That table 6 is represented is the result who the melt temperature and the Thermal Properties of curing agent is analyzed by thermal-analysis instrumentation DSC (differential scanning calorimeter), TGA (thermogravimetric analyzer).By DSC test, the melt temperature of more different curing agent kinds, reaction temperature and thermal capacitance; By the TGA test, comparative heat decomposes initial temperature and residue, and will the results are shown in table 6.
[table 6] variety classes curing agent thermal analysis test result
| Classification | DSC | TGA | |||||
| Melt temperature (℃) | Thermal capacitance (j/g) | Crystallization temperature (℃) | 95% o'clock thermal decomposition initial temperature | Residue in the time of 700 ℃ (%) | |||
| 1 time | 2 times | 1 time | 2 times | ||||
| Original phenol | 54 | - | 7.603 | - | 150.04 | 205 | 58.5 |
| Six free phenols | 60.11 | 155.81 | 4.669 | 50.09 | - | 175 | 45.09 |
| Epoxy polyester | 69.56 | - | 7.483 | - | - | 385 | 37.56 |
| Programming rate (℃/min) | 10 | 20 | |||||
| The purified gas scale of construction (N 2) | 50 | 50 | |||||
As above shown in the table 6, under the situation of original phenol, observed crystallization at 150 ℃.Under the situation of the phenol that harmfulness reduces, do not observe crystallization temperature; The TGA residuals content is low, and this is that heat endurance descends because the content of inorganic matter is low and cause 95% o'clock thermal decomposition initial temperature lower than original phenol thus.Under the situation of epoxy polyester, find it 70 ℃ of left and right sides fusions, the TGA residue is few, and 95% o'clock thermal decomposition initial temperature is than original phenol height, excellent heat stability.
As mentioned above, at natural fabric, utilize at least a felt that mixes by a certain percentage of fiber, TPO pristine fibre, fibers and inorganic again, contain by at least a Powdered curing agent that constitutes among six free phenols, melamine, epoxy resin, unsaturated polyester (UP), epoxy polyester, the phenol epoxy polyester, thereby can improve the mouldability and the operation of sound-absorbing material and improve operating environment, reduction by the bad smell of sound-absorbing material generation and the unplessantness displeasure that harmful components caused.
As mentioned above, according to the present invention, a kind of mouldability and operation that can improve sound-absorbing material be can make, improve operating environment, the bad smell that produces by sound-absorbing material and the automotive interior equipment sound-absorbing material of the unplessantness displeasure that harmful components caused reduced.
Claims (7)
1, a kind of automotive interior equipment sound-absorbing material is characterized in that containing: by natural fabric, utilize at least a felt that mixes by a certain percentage of fiber, TPO pristine fibre, fibers and inorganic again; By at least a that constitute, the Powdered curing agent that is mixed into described felt and connects and solidify among six free phenols, melamine, epoxy resin, unsaturated polyester (UP), epoxy polyester, the phenol epoxy polyester with described felt.
2, automotive interior equipment sound-absorbing material as claimed in claim 1 is characterized by, and described felt accounts for 80～90 weight %, and described curing agent accounts for 10～20 weight %.
3, automotive interior equipment sound-absorbing material as claimed in claim 1 or 2, it is characterized by, the proportion of composing of described felt is, by the total content that utilizes fiber and pristine fibre again that cotton fiber and chemical fibre constituted is 80～90 weight %, and the total content of hemp and inorfil is 10～20 weight %.
4, automotive interior equipment sound-absorbing material as claimed in claim 1 or 2 is characterized by, and the particle diameter of described curing agent is distributed as 10～200 μ m, and the average grain diameter size is 20～80 μ m.
5, automotive interior equipment sound-absorbing material as claimed in claim 1 is characterized by, and the content of ammonia composition is≤0.2% in described curing agent six free phenols.
6, a kind of automotive interior equipment sound-absorbing material is characterized by, and the molding thickness of described felt is 5～30mm.
7, a kind of automotive interior equipment sound-absorbing material is characterized by, and the cotton fiber density of described felt is 350～2000g/m
2
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040052096 | 2004-07-05 | ||
| KR1020040052096A KR100587916B1 (en) | 2004-07-05 | 2004-07-05 | Sound-absorbing material for interior of automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1718896A true CN1718896A (en) | 2006-01-11 |
Family
ID=35930836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200410056811XA Pending CN1718896A (en) | 2004-07-05 | 2004-08-20 | Sound absorbing material for automobile inside equipment |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100587916B1 (en) |
| CN (1) | CN1718896A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294873A (en) * | 2011-05-28 | 2011-12-28 | 无锡吉兴汽车声学部件科技有限公司 | Production method of formed reconstituted cotton shock pad under carpet of automobile |
| CN103435976A (en) * | 2013-09-05 | 2013-12-11 | 华东理工大学 | Natural seaweed fiber/epoxy resin damping composite and preparation method thereof |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100779850B1 (en) * | 2006-09-20 | 2007-11-29 | 신후철 | Sound absorbing material for vehicle and manufacturing method thereof |
| KR101272551B1 (en) * | 2011-06-27 | 2013-06-11 | 엔브이에이치코리아(주) | Manufacturing method of multi-layer sound-absorbing material for vehicle |
| US9492955B2 (en) | 2012-11-06 | 2016-11-15 | Hyundai Motor Company | Molding process of highly heat-resistant sound absorbing and insulating materials |
| KR101439066B1 (en) | 2013-12-19 | 2014-09-05 | 현대자동차주식회사 | Noise absorbent fabric with excellent formability and appearance, and manufacturing method for the same |
| KR101428426B1 (en) | 2013-12-19 | 2014-08-07 | 현대자동차주식회사 | Noise absorbent fabric with improved heat-resistant and formability, and manufacturing method for the same |
-
2004
- 2004-07-05 KR KR1020040052096A patent/KR100587916B1/en not_active IP Right Cessation
- 2004-08-20 CN CNA200410056811XA patent/CN1718896A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294873A (en) * | 2011-05-28 | 2011-12-28 | 无锡吉兴汽车声学部件科技有限公司 | Production method of formed reconstituted cotton shock pad under carpet of automobile |
| CN103435976A (en) * | 2013-09-05 | 2013-12-11 | 华东理工大学 | Natural seaweed fiber/epoxy resin damping composite and preparation method thereof |
| CN103435976B (en) * | 2013-09-05 | 2016-06-08 | 华东理工大学 | A kind of natural seaweed fiber/epoxy resin damp composite material and its preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20060003276A (en) | 2006-01-10 |
| KR100587916B1 (en) | 2006-06-08 |
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