EP2185017A2 - Improvement to a plastic part of a protective helmet - Google Patents
Improvement to a plastic part of a protective helmetInfo
- Publication number
- EP2185017A2 EP2185017A2 EP08851049A EP08851049A EP2185017A2 EP 2185017 A2 EP2185017 A2 EP 2185017A2 EP 08851049 A EP08851049 A EP 08851049A EP 08851049 A EP08851049 A EP 08851049A EP 2185017 A2 EP2185017 A2 EP 2185017A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- protective helmet
- parts
- plastic part
- thermoplastic
- plastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 22
- 239000004033 plastic Substances 0.000 title claims abstract description 21
- 229920003023 plastic Polymers 0.000 title claims abstract description 21
- 229920001169 thermoplastic Polymers 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 239000004416 thermosoftening plastic Substances 0.000 claims description 13
- 229920002292 Nylon 6 Polymers 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 230000005865 ionizing radiation Effects 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000009472 formulation Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 125000000746 allylic group Chemical group 0.000 claims description 2
- 238000010348 incorporation Methods 0.000 claims description 2
- 150000002734 metacrylic acid derivatives Chemical class 0.000 claims description 2
- 230000005855 radiation Effects 0.000 abstract description 4
- 239000004952 Polyamide Substances 0.000 description 8
- 229920002647 polyamide Polymers 0.000 description 8
- 239000004696 Poly ether ether ketone Substances 0.000 description 3
- 239000004954 Polyphthalamide Substances 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920002530 polyetherether ketone Polymers 0.000 description 3
- 229920006375 polyphtalamide Polymers 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 229920006258 high performance thermoplastic Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 241000761389 Copa Species 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920000571 Nylon 11 Polymers 0.000 description 1
- -1 PES Polymers 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 229920006345 thermoplastic polyamide Polymers 0.000 description 1
- 239000004634 thermosetting polymer Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42C—MANUFACTURING OR TRIMMING HEAD COVERINGS, e.g. HATS
- A42C2/00—Manufacturing helmets by processes not otherwise provided for
-
- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B3/00—Helmets; Helmet covers ; Other protective head coverings
- A42B3/04—Parts, details or accessories of helmets
- A42B3/06—Impact-absorbing shells, e.g. of crash helmets
Definitions
- the present invention relates to the field of the production of plastic parts and more particularly the production of plastic parts of a protective helmet. According to the invention there is provided a method of treating these materials to improve the holding performance at low and high temperatures.
- the parts of a protective helmet are intended more particularly for firefighter helmets and are in particular its outer shell, and the plastic parts associated therewith, for example the retaining parts of the chinstrap or the breathing mask, or the pivot axes of the protection screens, internal strip and other.
- the protective helmets in particular the fire helmets, have a hull made of thermoplastic, and are currently made of polyamide or of Acrylonitrylebutadiene-styrene / polycarbonate (ABS / PC) alloy. It is difficult to reconcile for the same thermoplastic the keeping warm, for example at +120 0 C, and cold, especially at -40 0 C.
- the parts constituting the helmet could be in another material such as metal, curable polymer or high performance thermoplastic such as Polyphthalamide (PPA), Polyethylenesulfone (PES), Polyetheretherketone (PEEK).
- PPA Polyphthalamide
- PES Polyethylenesulfone
- PEEK Polyetheretherketone
- the present invention intends to solve the problems mentioned above by proposing a particularly simple and effective method, to give the helmet parts made of thermoplastic qualities identical to those they would have if they were made of other materials such as thermosetting .
- the helmet parts made of thermoplastics are ionized, knowing that the ionization is a process which is mainly used to sterilize medical-surgical equipment and for the conservation of agri-food products.
- the parts treated according to the invention have for the same temperature range mechanical characteristics of about 5 to 10% higher, and the new mechanical characteristics allow use of the helmet in a wider range of use.
- the protective helmet made according to the invention has a greatly improved cold and heat resistance, which is particularly advantageous for a fireman's helmet.
- the plastic part of a helmet of protection is characterized in that it undergoes a treatment to improve the technical characteristics and in particular the mechanical strength at low and high temperature of a piece of a protective helmet, said treatment consisting of subjecting these parts radiation ionizing.
- the part is made of thermoplastic type plastic, such as thermoplastic polyamide 6 type (P A6), or polyamide 6/6 (PA 6/6).
- thermoplastic polyamide 6 type P A6
- PA 6/6 polyamide 6/6
- the part is an outer shell of thermoplastic protective helmet.
- the ionizing radiation is an ionization by electrons, or by photons.
- the invention also relates to the method of making parts, which is done according to the following steps:
- the parts are made of plastic material, for example by injection of thermoplastic.
- the parts are introduced into an ionization chamber to undergo ionizing radiation.
- the parts, once ionized are evacuated.
- a co-agent is introduced into the formulation which is intended to facilitate the bridging of the macromolecular chains when the double bonds which compose it are opened.
- the plastic parts of the protective helmet such as its shell and / or accessories and various parts associated with it, which are made with a thermoplastic, undergo according to the invention a treatment to improve the resistance to temperatures also very low and high, holding that these parts would not have without having undergone the treatment of the invention.
- the treatment of the invention consists of a process using ionizing radiation, radiation which with sufficient energy causes within the material reactive entities called ions.
- ions are immediately transformed into free radicals, active, which in combination create new permanent chemical bonds.
- the plastic parts of the helmet of the invention are, for example, made of thermoplastic polymer, such as polyamide (PA) and advantageously of the polyamide 6 (PA 6) type, Polyamide 6-6 (PA 6-6), which are materials that react perfectly with electrons, but the material could be Polyamide 4-6 (PA 4-6), or Polyamide 11 (PA 11).
- PA polyamide
- PA 6 polyamide 6
- PA 6-6 polyamide 6-6
- PA 11 Polyamide 11
- Two types of ionization can be used for the process of the invention, namely electron ionization (Beta treatment), or photon ionization (Gamma treatment).
- electron ionization electrons emitted from an electrical source lose some of their kinetic energy at each collision with an atom of the treated part.
- photons emitted by a radioactive source move the electrons to create ions.
- parts produced and crosslinked by ionization are for lighter given characteristics, and their implementation as for example by injection is easier, with a reduced cycle time.
- the free melting point of the material is eliminated, which gives the material a better resistance to mechanical properties at high temperatures.
- thermoplastic During ionization, there is a bridging of molecular chains that tends to give the thermoplastic the same behavior as a thermoset.
- the parts are made of plastic material, for example by thermoplastic injection, such as polyamide 6 or polyamide 6/6.
- the parts are for example made by injection, granules-based materials previously designated.
- a co-agent is introduced into the formulation which is intended to facilitate the bridging of the macromolecular chains during the opening of the double bonds which compose it.
- the use of a co-agent in the formulation also causes a significant decrease in the dose required for crosslinking of macromolecular chains.
- Preferred co-agents are from the family of methacrylates or allylics.
- the volume of incorporation of the co-agent into the formulation is for example between 0.05% and 10% by weight.
- the parts are introduced into an ionization chamber to undergo ionizing radiation.
- EPDM ethylene dimonomer compounds
- CoPA 6-12 copolyamides 6-12
- TPE-E thermoplastic elastomer polyesters
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Helmets And Other Head Coverings (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL08851049T PL2185017T3 (en) | 2007-09-10 | 2008-09-05 | Improvement to a plastic part of a protective helmet |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0706335A FR2920644B1 (en) | 2007-09-10 | 2007-09-10 | IMPROVEMENT FOR A PLASTIC PART OF A PROTECTIVE HELMET |
PCT/FR2008/001239 WO2009066018A2 (en) | 2007-09-10 | 2008-09-05 | Improvement to a plastic part of a protective helmet |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2185017A2 true EP2185017A2 (en) | 2010-05-19 |
EP2185017B1 EP2185017B1 (en) | 2011-08-10 |
Family
ID=39291613
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08851049A Active EP2185017B1 (en) | 2007-09-10 | 2008-09-05 | Improvement to a plastic part of a protective helmet |
Country Status (6)
Country | Link |
---|---|
US (1) | US20100306903A1 (en) |
EP (1) | EP2185017B1 (en) |
AT (1) | ATE519392T1 (en) |
FR (1) | FR2920644B1 (en) |
PL (1) | PL2185017T3 (en) |
WO (1) | WO2009066018A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111263622A (en) | 2017-08-25 | 2020-06-09 | 内奥瓦斯克迪亚拉公司 | Sequentially deployed transcatheter mitral valve prosthesis |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US40422A (en) * | 1863-10-27 | Improvement in wagon-standards | ||
US2858259A (en) * | 1952-12-06 | 1958-10-28 | Gen Electric | Electron irradiation of preformed polyamide resin |
US3101275A (en) * | 1957-05-15 | 1963-08-20 | Du Pont | Process of coating a shaped swollen polymer substrate and treating with ionizing radiation |
US3842705A (en) * | 1973-03-15 | 1974-10-22 | D Woodard | Stringed instruments with improved strings due to irradiation and process for producing the same |
US4037112A (en) * | 1975-03-25 | 1977-07-19 | Ppg Industries, Inc. | Apparatus for crosslinking ultraviolet light curable coatings |
US4065624A (en) * | 1976-01-27 | 1977-12-27 | Ppg Industries, Inc. | Radiation curable coating composition |
US4170663A (en) * | 1978-03-13 | 1979-10-09 | Ppg Industries, Inc. | Method for producing coatings of low gloss |
US4268339A (en) * | 1979-07-17 | 1981-05-19 | General Electric Company | Process for radiation cured continuous laminates |
US4444816A (en) * | 1980-12-03 | 1984-04-24 | Raychem Corporation | Radiation cross-linking of polyamides |
JPS5912936A (en) * | 1982-07-13 | 1984-01-23 | Sumitomo Electric Ind Ltd | Crosslinked polyamide resin composition |
EP0380523A1 (en) * | 1987-08-03 | 1990-08-08 | AlliedSignal Inc. | Impact resistant helmet |
DE19525834A1 (en) * | 1995-05-12 | 1996-11-14 | Heidemann Werke | Mfr. of gearbox parts from high-molecular plastic |
JPH11315156A (en) * | 1998-05-07 | 1999-11-16 | Shinko Chemical Co Ltd | Highly heat-resistant crosslinked molded product of noncrystalline polyamide and its production |
US6207077B1 (en) * | 2000-02-18 | 2001-03-27 | Orion 21 A.D. Pty Ltd | Luminescent gel coats and moldable resins |
US7008559B2 (en) * | 2001-06-06 | 2006-03-07 | Nomadics, Inc. | Manganese doped upconversion luminescence nanoparticles |
US7067072B2 (en) * | 2001-08-17 | 2006-06-27 | Nomadics, Inc. | Nanophase luminescence particulate material |
AU2003212458A1 (en) * | 2002-02-26 | 2003-09-09 | Board Of Regents, The University Of Texas System | Cyclo(n)pyrroles and methods thereto |
US6846758B2 (en) * | 2002-04-19 | 2005-01-25 | Honeywell International Inc. | Ballistic fabric laminates |
ITRE20040085A1 (en) * | 2004-07-15 | 2004-10-15 | Bl Service Sas Di Lusetti Eros | MULTI-PURPOSE MATERIAL WITH HIGH PHYSICAL AND MECHANICAL CHARACTERISTICS. |
US20100000009A1 (en) * | 2008-07-02 | 2010-01-07 | Morgan Donald E | Compressible Liner for Impact Protection |
-
2007
- 2007-09-10 FR FR0706335A patent/FR2920644B1/en not_active Expired - Fee Related
-
2008
- 2008-09-05 WO PCT/FR2008/001239 patent/WO2009066018A2/en active Application Filing
- 2008-09-05 AT AT08851049T patent/ATE519392T1/en active
- 2008-09-05 EP EP08851049A patent/EP2185017B1/en active Active
- 2008-09-05 PL PL08851049T patent/PL2185017T3/en unknown
- 2008-09-05 US US12/677,212 patent/US20100306903A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2009066018A2 * |
Also Published As
Publication number | Publication date |
---|---|
US20100306903A1 (en) | 2010-12-09 |
EP2185017B1 (en) | 2011-08-10 |
ATE519392T1 (en) | 2011-08-15 |
FR2920644B1 (en) | 2009-12-04 |
FR2920644A1 (en) | 2009-03-13 |
WO2009066018A2 (en) | 2009-05-28 |
PL2185017T3 (en) | 2012-05-31 |
WO2009066018A3 (en) | 2009-07-16 |
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