CN101056530B - Preparing method of high temperature resistant electromagnetic wave absorbent material film - Google Patents
Preparing method of high temperature resistant electromagnetic wave absorbent material film Download PDFInfo
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- CN101056530B CN101056530B CN2007100490180A CN200710049018A CN101056530B CN 101056530 B CN101056530 B CN 101056530B CN 2007100490180 A CN2007100490180 A CN 2007100490180A CN 200710049018 A CN200710049018 A CN 200710049018A CN 101056530 B CN101056530 B CN 101056530B
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Abstract
The present invention relates to a heat resisting electromagnetic wave absorbing material, mainly belonging to electromagnetic wave absorbing material technology. The present invention includes the following components: fluororubber FPM2601: 20-25wt.%, Hexamethylene diamine carbamate: 0.2-0.3wt.%, copper inhibitor No.65: 0.1-0.2wt.%, vulcanizer: 2-4wt.% and electromagnetic wave absorbing agent: 60-70wt.%. The heat resisting electromagnetic wave absorbing material has a good temperature stability, consistency and a simple and effective quality control, a high tensile strength and breaking elongation, and is convenient for preparing products with various shapes and standards.
Description
Technical field
The invention belongs to the electromagnetic wave absorbent material technology, particularly a kind of high temperature resistant electromagnetic wave absorbs the film preparation method.
Background technology
Present widely used electromagnetic wave absorbent material (hereinafter to be referred as absorbing material) mainly contains dielectric class and magnetic class.Dielectric class absorbing material is generally the carbon impregnated foam absorbing material, has remarkable advantages such as in light weight, absorptivity height, but have that thickness is thick, frequency band is narrow, shortcoming such as resistance to elevated temperatures poor (generally being no more than 120 ℃), mechanical strength are low.Magnetic class absorbing material mainly is divided into two kinds of offset plate and coating absorbing materials, has advantages such as absorption band is wide, thin thickness, absorptivity is big, mechanical mechanics property is good, has all obtained in a lot of fields using preferably.But its base rubber of offset plate absorbing material of using mainly is natural rubber or the neoprene with flame-retarding characteristic at present, has the relatively poor disadvantages such as (less than 150 ℃) of heat resistance.
Be used for the antenna array of accurately measuring in some engineering owing to exist electromagnetic mixed and disorderly reflection to be difficult to meet the requirements of measuring accuracy, be badly in need of 5～6GHz frequency range high-absorbility absorbing material, with phase pattern and the amplitude pattern characteristic of having improved array-element antenna.Because the communication system target seeker of some equipment is when the reentry atmosphere, the antenna array position can produce very high temperature, common absorbing material can not bear such high-temperature (300 ℃), not only can not play the effect that improves electric property, on the contrary can be owing to the safety of burning, charing harm whole system, therefore developing the high temperature absorbing material has crucial meaning and application prospect.
Summary of the invention
Technical problem to be solved by this invention is, the preparation method of the film that a kind of electromagnetic wave absorbent material high temperature resistant, high reliability makes is provided.
The technical scheme that the present invention solve the technical problem employing is, the high temperature resistant electromagnetic wave absorbent material film preparation method, and its raw materials by weight that adopts comprises following component:
Raw materials by weight comprises following component:
Fluorubber FPM2601 20～25
Hexyl diamino carbamate 0.2～0.3
Copper deactivator No. 65 0.1～0.2
Vulcanizing agent 2～4
Radio-radar absorber 60～70
Described vulcanizing agent is a magnesium oxide;
This preparation method is characterised in that, may further comprise the steps:
1) plasticate:
Drying glue: 50～60 ℃ of temperature, the time is 4～6 hours;
When plasticating, 30～35 ℃ of roller temperature, earlier with 5～6mm roll spacing down by 3～4 times, make it to be subjected to hot pressing soft, again with 3～4mm roll spacing by 3～4 times, then with pony roll apart from thin-pass 10～15 minutes, last with sheet under the roll spacing of 5～6mm;
2) mixing:
Be scattered in various compounding ingredients and radio-radar absorber except that magnesium oxide in the rubber equably earlier, carry out mixingly with mill, the roller temperature control is between 45～55 ℃, and roll spacing reduces to 3mm from 4mm, mixing time 10～15 minutes, magnesium oxide added later at mixing 8 minutes;
3) rolling out film:
Slice thickness is between 2.2～2.7mm;
4) sulfuration:
According to traditional rubber vulcanization process, sulfide stress is used the pressure of 20～50MPa, and curing temperature is 150 ℃～160 ℃, and cure time is 10～12 minutes.
The invention has the beneficial effects as follows, compare with other electromagnetic wave absorbent material and have following outstanding advantage:
1, excellent performance under the high temperature.This electro-magnetic wave absorption film can be in ℃ scope of room temperature～300 operate as normal, especially show more stable absorption characteristic in high temperature section.
2, temperature stability is good.This film is through-55 ℃～300 ℃ temperature shock (by the GJB360A requirement), and mechanical property and electrical property do not have significant change.
3, this absorbs the mature production technology of film, and homogeneity of product and stability obviously improve, and quality control is simply effective.
4, this absorbs film aspect mechanical property, has high hot strength and elongation at break, is convenient to prepare the product of difformity and specification.
The present invention is further illustrated below in conjunction with embodiment.
Embodiment
The raw materials by weight that the present invention adopts comprises following component:
Fluorubber FPM2601 20～25
Hexyl diamino carbamate 0.2～0.3
Copper deactivator No. 65 0.1～0.2
Vulcanizing agent 2～4
Radio-radar absorber 60～70
Described vulcanizing agent is a magnesium oxide;
Concrete preparation technology is:
Step 1: plasticating technology process.
Rubber viscosity at normal temperatures is very high, is difficult to cutting and further processing, so need drying glue.The drying glue temperature is generally 50～60 ℃, and the time is 4～6 hours.
When plasticating, 30～35 ℃ of roller temperature are passed through 3～4 times down with 5～6mm roll spacing earlier, make it to be subjected to hot pressing soft, pass through 3～4 times with 3～4mm roll spacing again.After this with pony roll apart from thin-pass 10～15 minutes, last with sheet under the roll spacing of 5～6mm.
Step 2: calendering process process.
Earlier various compounding ingredients (except the magnesium oxide) and radio-radar absorber are scattered in the rubber more equably, carry out mixing with mill.
The roller temperature control is between 45～55 ℃, and roll spacing reduces to 3mm from 4mm.Mixing time 10～15 minutes.Magnesium oxide added later at mixing 8 minutes.
Step 3: rolling out film technical process.
According to electro-magnetic wave absorption performance Design Theory and experimental data, slice thickness is between 2.2～2.7mm, and cooperates the finished product shape need, and roughly slice is this geomery.
Step 4: vulcanization process.
According to traditional rubber vulcanization process, sulfide stress is used the pressure of 20～50MPa.
Curing temperature is 150 ℃～160 ℃.
Cure time is 10～12 minutes.
The film size size adopts different sulfurizing moulds as required.
As another embodiment, the raw materials by weight that preparation technology adopts comprises following component:
Fluorubber FPM2601 25
Hexyl diamino carbamate 0.3
Copper deactivator No. 65 0.2
Vulcanizing agent 4
Radio-radar absorber 70.
Claims (2)
1. high temperature resistant electromagnetic wave absorbent material film preparation method, its raw materials by weight that adopts comprises following component:
Fluorubber FPM2601 20～25
Hexyl diamino carbamate 0.2～0.3
Copper deactivator No. 65 0.1～0.2
Vulcanizing agent 2～4
Radio-radar absorber 60～70
Described vulcanizing agent is a magnesium oxide;
This preparation method is characterised in that, may further comprise the steps:
1) plasticate:
Drying glue: 50～60 ℃ of temperature, the time is 4～6 hours;
When plasticating, 30～35 ℃ of roller temperature, earlier with 5～6mm roll spacing down by 3～4 times, make it to be subjected to hot pressing soft, again with 3～4mm roll spacing by 3～4 times, then with pony roll apart from thin-pass 10～15 minutes, last with sheet under the roll spacing of 5～6mm;
2) mixing:
Be scattered in various compounding ingredients and radio-radar absorber except that magnesium oxide in the rubber equably earlier, carry out mixingly with mill, the roller temperature control is between 45～55 ℃, and roll spacing reduces to 3mm from 4mm, mixing time 10～15 minutes, magnesium oxide added later at mixing 8 minutes;
3) rolling out film:
Slice thickness is between 2.2～2.7mm;
4) sulfuration:
According to traditional rubber vulcanization process, sulfide stress is used the pressure of 20～50MPa, and curing temperature is 150 ℃～160 ℃, and cure time is 10～12 minutes.
2. high temperature resistant electromagnetic wave absorbent material film preparation method as claimed in claim 1 is characterized in that, raw materials by weight comprises following component:
Fluorubber FPM2601 25
Hexyl diamino carbamate 0.3
Copper deactivator No. 65 0.2
Vulcanizing agent 4
Radio-radar absorber 70.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100490180A CN101056530B (en) | 2007-04-30 | 2007-04-30 | Preparing method of high temperature resistant electromagnetic wave absorbent material film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100490180A CN101056530B (en) | 2007-04-30 | 2007-04-30 | Preparing method of high temperature resistant electromagnetic wave absorbent material film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101056530A CN101056530A (en) | 2007-10-17 |
| CN101056530B true CN101056530B (en) | 2011-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007100490180A Expired - Fee Related CN101056530B (en) | 2007-04-30 | 2007-04-30 | Preparing method of high temperature resistant electromagnetic wave absorbent material film |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109109248A (en) * | 2017-06-26 | 2019-01-01 | 洛阳尖端技术研究院 | A kind of molding vulcanization process and patch |
| CN112029421B (en) * | 2020-09-11 | 2022-10-25 | 航天特种材料及工艺技术研究所 | Wave-absorbing adhesive film material and preparation method thereof |
| CN113271730B (en) * | 2021-05-27 | 2022-08-26 | 四川海英电子科技有限公司 | Method for manufacturing high-density arbitrary interconnection printed circuit board |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1199361A (en) * | 1996-09-03 | 1998-11-18 | 株式会社东金 | Method of mfg. composite magnetic sheet |
| CN1484486A (en) * | 2003-07-24 | 2004-03-24 | 上海交通大学 | Method for preparing electromagnetic shielding compound material |
| CN1509138A (en) * | 2002-12-13 | 2004-06-30 | 长春恒威电磁兼容技术有限公司 | Light flexible wafer electromagnetic wave absorber |
-
2007
- 2007-04-30 CN CN2007100490180A patent/CN101056530B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1199361A (en) * | 1996-09-03 | 1998-11-18 | 株式会社东金 | Method of mfg. composite magnetic sheet |
| CN1509138A (en) * | 2002-12-13 | 2004-06-30 | 长春恒威电磁兼容技术有限公司 | Light flexible wafer electromagnetic wave absorber |
| CN1484486A (en) * | 2003-07-24 | 2004-03-24 | 上海交通大学 | Method for preparing electromagnetic shielding compound material |
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| CN101056530A (en) | 2007-10-17 |
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Granted publication date: 20110608 Termination date: 20120430 |