CN102068071A - Glass fiber reinforced plastic helmet shell and fabrication technique thereof - Google Patents
Glass fiber reinforced plastic helmet shell and fabrication technique thereof Download PDFInfo
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- CN102068071A CN102068071A CN 201010598199 CN201010598199A CN102068071A CN 102068071 A CN102068071 A CN 102068071A CN 201010598199 CN201010598199 CN 201010598199 CN 201010598199 A CN201010598199 A CN 201010598199A CN 102068071 A CN102068071 A CN 102068071A
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Abstract
The invention relates to a glass fiber reinforced plastic helmet shell and a fabrication technique thereof, and the helmet shell is a composite-structured helmet shell with a plastic shell attached on the outer surface of a base shell. In the fabrication method, the base shell of the helmet shell is made of fiber-reinforced plastic, the plastic shell is made of polyvinyl chloride plastic, polycarbonate plastic, polydiphenyl ether plastics, polyethylene plastic or other material, and the fabrication method is carried out according to a certain sequence, such as placing the plastic shell in a mold cavity, laying a fiber layer, coating resin, closing a mold, increasing the temperature and the pressure, and taking out the helmet shell after the pressure is kept for a period of time. The glass fiber reinforced plastic helmet fabricated according to the method has a composite structure, that is, the plastic shell is attached on the outer surface of the base shell, so the outer surface of the helmet shell becomes bright, clean, smooth and compact, consequently, the invention solves the defects of the shell directly made of glass fiber reinforced plastic, such as poor air tightness and poor anti-seepage property, processes, such as deburring, air bubble carving, gray filling and polishing, can be dispensed with, so that a great deal of manpower and a large quantity of material resources are saved, and the product quality and production efficiency of the helmet are increased.
Description
Technical field
The present invention relates to a kind of glass steel helmet shell and manufacturing process thereof, relate in particular to that a kind of to wear overhead be the helmet shell and the manufacturing process thereof of the helmet of matrix with fiberglass for the people.
Background technology
Racing car and Motor-cyclist must wear the safety of the helmet with the protection head, and the performance of the helmet depends on structure, material and the manufacture craft of its helmet shell to a great extent.In order to strengthen the intensity of the helmet, extensively adopt a kind of helmet shell of making the helmet with glass fibre or its goods as the reinforced plastics of reinforcing material at present, that is the material of helmet shell main body is for strengthening the fiberglass reinforced plastics that matrixes such as unsaturated polyester, epoxy resin or phenolic resins obtain by glass fibre, this helmet shell is commonly called as glass steel helmet shell, it has plurality of advantages such as high strength, shock resistance, corrosion-resistant and light weight, therefore liking of people extremely.
Up to now, existing glass steel helmet shell all is the structure of single structure, and the helmet shell is the basic shell that adopts fiberglass to make in other words.As everyone knows, there are many weak points in the housing that is obtained by the fiberglass manufacturing merely, the outer surface that mainly shows housing is bright and clean inadequately along sliding, be difficult to avoid occurring bubble, core, chipping, reel off raw silk from cocoons, defective such as subside and loosen, in addition, the mould of producing housing also can stay flaws such as overlap because of minute mode structure on housing, bring adverse effect not only for thus the air-tightness and the barrier properties of the helmet, and bring great trouble for post-production such as the japanning and the applique etc. of the helmet, so the helmet shell of the existing fiberglass helmet needs bar none through deflashing, the carving bubble, mend operations such as ash and polishing, just can carry out japanning afterwards, subsequent handlings such as baking and applique.It is pointed out that also repeated multiple times often of above-mentioned operation, need to expend a large amount of man power and materials thus.However, according to the glass steel helmet shell that traditional structure and traditional handicraft are produced, its quality is also extremely unstable.
Summary of the invention
The object of the present invention is to provide a kind of glass steel helmet shell and manufacturing process thereof with compound structure, the outer surface of this glass steel helmet shell is bright and clean not only have better air-tightness and barrier properties, and manufacturing process to be simpler along sliding, and workmanship is more stable.
A kind of glass steel helmet shell of the present invention, it is basic shell with fiberglass, it is characterized in that being attached with a plastic housing at the extexine of described basic shell.
The material of above-mentioned plastic housing is one or more in following five kinds of materials: igelite, polycarbonate plastic, terpolymer, polydiphenyl ether plastics and the vinyon be made up of butadiene, acrylonitrile, styrene.
The glass steel helmet shell manufacturing process of compound structure of the present invention comprises one or more in following six kinds of methods:
1) makes plastic housing → plastic housing is located in die cavity → lay fibrage → fibrage top-pour to resinize in plastic housing → matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating;
2) make plastic housing → in plastic housing, lay fibrage → plastic housing is located in die cavity → fibrage top-pour resinize → the matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating;
3) make plastic housing → in plastic housing, lay fibrage → fibrage top-pour to resinize → plastic housing is located in die cavity → matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating;
4) make plastic housing → in die cavity, lay fibrage → fibrage top-pour to resinize → matched moulds heat pressurization → pressurize → die sinking take out glass steel helmet shell base shell → with plastic housing be sleeved on basic shell in appearance → put die cavity → matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating into;
5) make flood after plastic housing → with fibrage is shaped or water resinize → fibrage of first-class resin be placed in the plastic housing → with plastic housing and placed fibrage in the plastic housing to lay together to be located in die cavity → matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating;
6) make flood after plastic housing → with fibrage is shaped or water resinize → with the fibrage of first-class resin place progressive die chamber → matched moulds heat pressurization → pressurize → die sinking take out glass steel helmet shell base shell → with plastic housing be sleeved on basic shell in appearance → put die cavity → matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating into.
Described manufacturing process is carried out later stage curing after glass steel helmet shell is taken out in die sinking.
The described later stage is cured as to place naturally at room temperature solidifies, and hardening time is more than 24 hours.
Described plastic housing adopts the making of plastic uptake technology, blow molding process to make or Shooting Technique is made.
The resin that uses in the described manufacturing process includes one or more in following three kinds of resins: unsaturated polyester, epoxy resin and phenolic resins.
Described fibrolaminar material comprises one or more in following six kinds of fibers: glass fibre, carbon fiber, boron fibre, aramid fiber, alumina fibre and silicon carbide fibre.
Described fibrage is cloth shape, band shape, felted, yarn shape or mesh-like.
Described fibrage be 100 grams/square metre to 600 grams/square metre the made piece cloth of glass fabric, band cloth or gauze, and adopt staggered superimposed mode to lay, wherein the area of superimposed part is no less than total laying with 25% of cloth area.
Described matched moulds heat in the pressurization heat temperature between 50 ℃-90 ℃, moulding pressure is between 0.3MPa-1.0MPa.
Described pressurize, its dwell time is in 10 seconds to 10 minute.
Has compound structure according to the prepared glass steel helmet of manufacturing process of the present invention shell, the outer surface that is its basic shell is attached with a plastic housing, thereby the outer surface of helmet shell becomes bright and clean, slides genial densification, overcome thus merely with fiberglass directly as defectives such as poor air-tightness that housing was brought and anti-permeability are strong, and can save operations such as deflashing, carving bubble, benefit ash and polishing, save great amount of manpower and material resources thus, improved the product quality and the production efficiency of the helmet.Technology of the present invention rationally, simply can guarantee the quality of production.
Description of drawings
Fig. 1 is the axonometric drawing of the plastic housing of glass steel helmet shell of the present invention;
Fig. 2 is the generalized section of the plastic housing of glass steel helmet shell of the present invention;
Fig. 3 is the generalized section of the basic shell of glass steel helmet shell of the present invention;
Fig. 4 is a glass steel helmet shell of the present invention with the generalized section of plastic housing after attached to basic shell outer surface.
The specific embodiment
With specific embodiment the present invention is further described below, referring to Fig. 1-4:
A kind of glass steel helmet shell, it with fiberglass as its basic shell 1, its greatest feature is to be attached with a plastic housing 2 at the extexine of described basic shell 1, in other words glass steel helmet shell of the present invention is a kind of helmet shell of compound structure, the mode that wherein said plastic housing 2 both can adopt hot pressing to adhere to also can adopt the mode of adhering to of colding pressing attached on the basic shell 1, certainly plastic housing 2 can also adopt that other are bonding, on fusion and the extexine of chemically combined mode attached to basic shell 1; Need to prove especially, the said fiberglass of the present invention is a kind of being commonly called as, it is to make a general reference so a kind of composite, the fibre reinforced plastics that promptly strengthen matrixes such as unsaturated polyester, epoxy resin or phenolic resins as reinforcing material and obtain with various fibers, wherein said fiber comprises the present widely used various fibrous materials of glass fibre, carbon fiber, boron fibre, aramid fiber, alumina fibre and silicon carbide fibre etc.; Also need to prove in addition, said plastic housing 2 among the present invention, the material of its making can be various plastics and the plastics that contain various charges, particularly including present widely used polyvinyl chloride (being commonly called as the PVC plastics), Merlon (being commonly called as the PC plastics), by the terpolymer (being commonly called as ABS plastic) that butadiene, acrylonitrile, styrene are formed, polyphenylene oxide (being commonly called as the PPO plastics) and polyethylene engineering plastics such as (being commonly called as the PE plastics).Obviously, because the outer surface at basic shell 1 is attached with a plastic housing 2, therefore the outer surface of helmet shell of the present invention becomes bright and clean, slides genial densification, the poor air-tightness and the anti-permeability of helmet shell have been improved thus, particularly the outer surface of helmet shell do not have bubble, core, chipping substantially, reel off raw silk from cocoons, subside, defective such as loose and overlap, also simplified production process thus greatly, so improved the product quality and the production efficiency of the helmet.In addition, the existence of plastic housing 2 also has other positive effect, can play the effect of buffering collision of closed such as it, and can strengthen the composite bending modulus of helmet shell, can effectively help to improve the shock resistance of helmet shell.
The manufacturing process of compound structure glass steel helmet shell of the present invention has several different methods, and six kinds of method of manufacturing technology divisions wherein are as follows:
Make plastic housing 2 → plastic housing 2 is located in die cavity → lay fibrage → fibrage top-pour to resinize plastic housing 2 in → matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating.
Make plastic housing 2 → plastic housing 2 in, lay fibrage → plastic housing 2 is located in die cavity → fibrage top-pour resinize → the matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating.
Embodiment 3
Make plastic housing 2 → plastic housing 2 in, lay fibrage → fibrage top-pour to resinize → plastic housing 2 is located in die cavity → matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating.
Embodiment 4
Make plastic housing 2 → in die cavity, lay fibrage → fibrage top-pour to resinize → matched moulds heat pressurization → pressurize → die sinking take out glass steel helmet shell base shell 1 → with plastic housing 2 be sleeved on basic shell 1 in appearance → put die cavity → matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating into.
Embodiment 5
Make flood after plastic housing 2 → with fibrage is shaped or water resinize → fibrage of first-class resin be placed in the plastic housing 2 → with plastic housing 2 and placed fibrage in the plastic housing to lay together to be located in die cavity → matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating.
Embodiment 6
Make flood after plastic housing 2 → with fibrage is shaped or water resinize → with the fibrage of first-class resin place progressive die chamber → matched moulds heat pressurization → pressurize → die sinking take out glass steel helmet shell base shell 1 → with plastic housing 2 be sleeved on basic shell 1 in appearance → put die cavity → matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating into.
In the various embodiments described above: make plastic housing 2 and be meant the plastic housing 2 that requires to have made in advance given shape and certain material according to specifying; Plastic housing 2 is located in die cavity to be meant and to put into by assigned address in the middle of the die cavity of mould making good plastic housing 2; The laying fibrage is meant at the inner surface of plastic housing 2 and lays such as fiber and goods thereof such as glass fibre, carbon fiber, boron fibre, aramid fiber, alumina fibre and silicon carbide fibres in plastic housing 2; The fibrage top-pour is resinized and is meant and is drenching, pour into a mould, brush or smearing the resin of appointment at the fibrage top-pour that has laid, and described resin comprises unsaturated polyester, epoxy resin, phenolic resins and other resins; Matched moulds is heated to pressurize and is meant after last process is finished cavity closed, simultaneously die cavity and interior material thereof are imposed certain pressure and certain temperature, impelling resin and fibrolaminar fusion and to solidify and form basic shell 1, for including the function that plastic housing then makes described plastic housing 2 and basic shell 1 close attachment or fusion in addition in the last operation; Pressurize is meant in the matched moulds relief die cavity and maintains certain pressure within a certain period of time, so that the further shaping of basic shell 1 and solidifying; Flood after will fibrage being shaped or water and resinize, be meant in advance by the shape establishment of helmet shell or woven fibrage, then with its immersion, flood, water pouring, pour into a mould, brush or smeared various resins; The fibrage of first-class resin is placed in the plastic housing 2, is meant fibrage to be shaped and dipping or water the back of resinizing and place on the inner surface of plastic housing 2; The fibrage of first-class resin is placed the progressive die chamber to be meant and fibrage to be shaped and dipping or water the back of resinizing and directly place in the progressive die chamber; Glass steel helmet shell is taken out in die sinking, is meant that die cavity with mould is opened and takes out the compound structure glass steel helmet shell that has been shaped.
The manufacturing process of glass steel helmet shell of the present invention can be carried out later stage curing after glass steel helmet shell is taken out in die sinking, combine so that resin further solidifies with fibrage; The described later stage solidifies and both can carry out in incubator or holding furnace, also can carry out at room temperature; Wherein cold curing is that nature is placed curing, and the optimum curing time of cold curing is more than 24 hours, and hardening time is long more, and resin combines well more with fibrage.
The manufacturing process of glass steel helmet shell of the present invention, the making of its plastic housing 2 can adopt the making of plastic uptake technology, blow molding process to make or Shooting Technique is made, certainly can also adopt other modes to make, be shaped and make shaping or the like such as warm-forming, ultra-sonic welded spelling.
The manufacturing process of glass steel helmet shell of the present invention, its resin can be various resins, and particularly including unsaturated polyester, epoxy resin and phenolic resins are arranged, different resins can use separately also can mix use.
The manufacturing process of glass steel helmet shell of the present invention, its fibrolaminar material can be various fibers, particularly including glass fibre, carbon fiber, boron fibre, aramid fiber, alumina fibre and silicon carbide fibre, different fibers can use separately also can mix use; In addition, fibrolaminar shape can be cloth shape, band shape, felted, yarn shape or mesh-like; Especially, described fibrage be 100 grams/square metre to 600 grams/square metre the made piece cloth of glass fabric, band cloth or gauze, and adopt staggered superimposed mode to lay, wherein the area of superimposed part is no less than total laying with 25% of cloth area.
The manufacturing process of glass steel helmet shell of the present invention, in order to help promoting the solidification process of resin in die cavity more, in described matched moulds is heated pressurization heat temperature between 50 ℃-90 ℃, moulding pressure is between 0.3MPa-1.0MPa; The dwell time of described pressurize is in 10 seconds to 10 minute.
Has compound structure according to the prepared glass steel helmet of manufacturing process of the present invention shell, be its basic shell 1 intimate be attached with a plastic housing 2, thereby make bright and clean, the sliding genial densification that becomes of the outer surface of helmet shell, overcome thus merely with fiberglass directly as defectives such as poor air-tightness that housing was brought and anti-permeability are not strong; Especially, the glass steel helmet shell that adopts manufacturing process of the present invention to make can save deflashing, carving bubble, mend operations such as ash and polishing, can save great amount of manpower and material resources thus, so improved the product quality and the production efficiency of the helmet widely; In addition, adopt the glass steel helmet shell of the compound structure of band plastic housing, also effectively improved the shock resistance of helmet shell.
Claims (12)
1. glass steel helmet shell, it is basic shell with fiberglass, it is characterized in that being attached with a plastic housing at the extexine of described basic shell.
2. a kind of glass steel helmet shell as claimed in claim 1, the material that it is characterized in that described plastic housing is one or more in following five kinds of materials: igelite, polycarbonate plastic, terpolymer, polydiphenyl ether plastics and the vinyon formed by butadiene, acrylonitrile, styrene.
3. produce the manufacturing process of glass steel helmet shell as claimed in claim 1 or 2, it is characterized in that described technology comprises one or more in following six kinds of methods:
1) makes plastic housing → plastic housing is located in die cavity → lay fibrage → fibrage top-pour to resinize in plastic housing → matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating;
2) make plastic housing → in plastic housing, lay fibrage → plastic housing is located in die cavity → fibrage top-pour resinize → the matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating;
3) make plastic housing → in plastic housing, lay fibrage → fibrage top-pour to resinize → plastic housing is located in die cavity → matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating;
4) make plastic housing → in die cavity, lay fibrage → fibrage top-pour to resinize → matched moulds heat pressurization → pressurize → die sinking take out glass steel helmet shell base shell → with plastic housing be sleeved on basic shell in appearance → put die cavity → matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating into;
5) make flood after plastic housing → with fibrage is shaped or water resinize → fibrage of first-class resin be placed in the plastic housing → with plastic housing and placed fibrage in the plastic housing to lay together to be located in die cavity → matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating;
6) make flood after plastic housing → with fibrage is shaped or water resinize → with the fibrage of first-class resin place progressive die chamber → matched moulds heat pressurization → pressurize → die sinking take out glass steel helmet shell base shell → with plastic housing be sleeved on basic shell in appearance → put die cavity → matched moulds pressurization → pressurize → die sinking taking-up glass steel helmet shell of heating into.
4. the manufacturing process of glass steel helmet shell as claimed in claim 3 is characterized in that carrying out later stage curing after glass steel helmet shell is taken out in die sinking.
5. the manufacturing process of glass steel helmet shell as claimed in claim 4, it is characterized in that the described later stage is cured as at room temperature to place naturally solidifies, and hardening time is more than 24 hours.
6. the manufacturing process of the glass of any described in claim 3 to 5 steel helmet shell is characterized in that described plastic housing adopts the making of plastic uptake technology, blow molding process to make or Shooting Technique is made.
7. the manufacturing process of the glass of any described in claim 3 to 5 steel helmet shell is characterized in that described resin includes one or more in following three kinds of resins: unsaturated polyester, epoxy resin and phenolic resins.
8. the manufacturing process of the glass of any described in claim 3 to 5 steel helmet shell is characterized in that described fibrolaminar material comprises one or more in following six kinds of fibers: glass fibre, carbon fiber, boron fibre, aramid fiber, alumina fibre and silicon carbide fibre.
9. the manufacturing process of the glass of any described in claim 3 to 5 steel helmet shell is characterized in that described fibrage is cloth shape, band shape, felted, yarn shape or mesh-like.
10. the manufacturing process of the glass of any one described in claim 3 to 5 steel helmet shell, it is characterized in that described fibrage be 100 grams/square metre to 600 grams/square metre the made piece cloth of glass fabric, band cloth or gauze, and adopt staggered superimposed mode to lay, wherein the area of superimposed part is no less than total laying 25% of cloth area.
11. the manufacturing process of any one glass steel helmet shell described in claim 3 to 5, it is characterized in that described matched moulds heat in the pressurization heat temperature between 50 ℃-90 ℃, moulding pressure is between 0.3MPa-1.0MPa.
12. the manufacturing process of any one glass steel helmet shell described in claim 3 to 5, the dwell time that it is characterized in that described pressurize is in 10 seconds to 10 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010598199 CN102068071A (en) | 2010-12-21 | 2010-12-21 | Glass fiber reinforced plastic helmet shell and fabrication technique thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010598199 CN102068071A (en) | 2010-12-21 | 2010-12-21 | Glass fiber reinforced plastic helmet shell and fabrication technique thereof |
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| CN102068071A true CN102068071A (en) | 2011-05-25 |
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| CN 201010598199 Pending CN102068071A (en) | 2010-12-21 | 2010-12-21 | Glass fiber reinforced plastic helmet shell and fabrication technique thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104497492A (en) * | 2014-12-24 | 2015-04-08 | 中国人民解放军总后勤部军需装备研究所 | Carbon fiber/glass fiber fabric flame-retardant composite helmet shell and preparation method thereof |
| CN104859157A (en) * | 2014-02-24 | 2015-08-26 | 联想(北京)有限公司 | Manufacturing method for electronic device |
| CN105328918A (en) * | 2015-12-15 | 2016-02-17 | 北京金轮沃德科技有限公司 | Helmet body forming method of fire fighting helmet |
| CN105962513A (en) * | 2016-07-13 | 2016-09-28 | 太仓市飞鸿塑钢制品有限公司 | Anti-collision ABS plastic safety helmet |
| CN106108204A (en) * | 2016-07-13 | 2016-11-16 | 太仓市飞鸿塑钢制品有限公司 | Multifunctional fiberglass safety helmet |
| CN106671683A (en) * | 2017-02-19 | 2017-05-17 | 于银强 | Car stained paper pasting technology |
| CN106827749A (en) * | 2016-12-21 | 2017-06-13 | 深圳三方无人技术有限公司 | For the composite and its production technology of nonmetallic ship hull |
| CN110534896A (en) * | 2018-05-26 | 2019-12-03 | 广东延春高新材料科技股份有限公司 | Low density glass steel antenna house and its production technology |
| CN110534867A (en) * | 2018-05-26 | 2019-12-03 | 广东延春高新材料科技股份有限公司 | The composite glass fiber reinforced antenna house of the high high-strength carbon fiber glass of wave transparent and its production technology |
| CN110534895A (en) * | 2018-05-26 | 2019-12-03 | 广东延春高新材料科技股份有限公司 | Glass with low dielectric constant steel antenna house and its production technology |
| CN113954281A (en) * | 2021-09-14 | 2022-01-21 | 肇庆博涵体育用品有限公司 | Bulletproof military helmet composite material and preparation method thereof |
| CN115181405A (en) * | 2022-08-12 | 2022-10-14 | 琉璃河防护科技(大连)有限公司 | High-protection impact-resistant cap and processing technology thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104859157A (en) * | 2014-02-24 | 2015-08-26 | 联想(北京)有限公司 | Manufacturing method for electronic device |
| CN104497492A (en) * | 2014-12-24 | 2015-04-08 | 中国人民解放军总后勤部军需装备研究所 | Carbon fiber/glass fiber fabric flame-retardant composite helmet shell and preparation method thereof |
| CN105328918A (en) * | 2015-12-15 | 2016-02-17 | 北京金轮沃德科技有限公司 | Helmet body forming method of fire fighting helmet |
| CN105328918B (en) * | 2015-12-15 | 2017-10-24 | 北京金轮沃德科技有限公司 | A kind of body formed method of helmet for fire hat |
| CN105962513A (en) * | 2016-07-13 | 2016-09-28 | 太仓市飞鸿塑钢制品有限公司 | Anti-collision ABS plastic safety helmet |
| CN106108204A (en) * | 2016-07-13 | 2016-11-16 | 太仓市飞鸿塑钢制品有限公司 | Multifunctional fiberglass safety helmet |
| CN106827749A (en) * | 2016-12-21 | 2017-06-13 | 深圳三方无人技术有限公司 | For the composite and its production technology of nonmetallic ship hull |
| CN106671683A (en) * | 2017-02-19 | 2017-05-17 | 于银强 | Car stained paper pasting technology |
| CN110534896A (en) * | 2018-05-26 | 2019-12-03 | 广东延春高新材料科技股份有限公司 | Low density glass steel antenna house and its production technology |
| CN110534867A (en) * | 2018-05-26 | 2019-12-03 | 广东延春高新材料科技股份有限公司 | The composite glass fiber reinforced antenna house of the high high-strength carbon fiber glass of wave transparent and its production technology |
| CN110534895A (en) * | 2018-05-26 | 2019-12-03 | 广东延春高新材料科技股份有限公司 | Glass with low dielectric constant steel antenna house and its production technology |
| CN110534895B (en) * | 2018-05-26 | 2021-09-03 | 广东延春高新材料科技股份有限公司 | Low-dielectric constant glass fiber reinforced plastic antenna housing and production process thereof |
| CN113954281A (en) * | 2021-09-14 | 2022-01-21 | 肇庆博涵体育用品有限公司 | Bulletproof military helmet composite material and preparation method thereof |
| CN115181405A (en) * | 2022-08-12 | 2022-10-14 | 琉璃河防护科技(大连)有限公司 | High-protection impact-resistant cap and processing technology thereof |
| CN115181405B (en) * | 2022-08-12 | 2024-01-12 | 琉璃河防护科技(大连)有限公司 | High-protection impact-resistant cap and processing technology thereof |
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Application publication date: 20110525 |