WO2021137709A1 - Procédé de fabrication d'un matériau textile pour la protection radiologique - Google Patents

Procédé de fabrication d'un matériau textile pour la protection radiologique Download PDF

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Publication number
WO2021137709A1
WO2021137709A1 PCT/PT2019/050046 PT2019050046W WO2021137709A1 WO 2021137709 A1 WO2021137709 A1 WO 2021137709A1 PT 2019050046 W PT2019050046 W PT 2019050046W WO 2021137709 A1 WO2021137709 A1 WO 2021137709A1
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WO
WIPO (PCT)
Prior art keywords
tungsten
polypropylene
additional
filaments
raw material
Prior art date
Application number
PCT/PT2019/050046
Other languages
English (en)
Inventor
João ESPREGUEIRA-MENDES
Luís ALVES
Marta Sofia DOS SANTOS MARTINS
Nuno André CURADO MATEUS CORREIA
Daniela TORRES TAVARES DA SILVA
Original Assignee
Espmen – Consultoria Unipessoal Lda
Hlogis
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Espmen – Consultoria Unipessoal Lda, Hlogis filed Critical Espmen – Consultoria Unipessoal Lda
Priority to PCT/PT2019/050046 priority Critical patent/WO2021137709A1/fr
Publication of WO2021137709A1 publication Critical patent/WO2021137709A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • D01F1/106—Radiation shielding agents, e.g. absorbing, reflecting agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/16—Screening or neutralising undesirable influences from or using, atmospheric or terrestrial radiation or fields
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0013—Extrusion moulding in several steps, i.e. components merging outside the die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/255—Flow control means, e.g. valves
    • B29C48/2552—Flow control means, e.g. valves provided in the feeding, melting, plasticising or pumping zone, e.g. screw, barrel, gear-pump or ram
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/304—Extrusion nozzles or dies specially adapted for bringing together components, e.g. melts within the die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/345—Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/355—Conveyors for extruded articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B29C48/404—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders the screws having non-intermeshing parts
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D2400/00—Functions or special features of garments
    • A41D2400/26—UV light protection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/28—Storing of extruded material, e.g. by winding up or stacking

Definitions

  • the present application refers to a method for producing a textile material for radiation protection.
  • the present application refers to a method for producing a textile material for radiation protection that comprises the following steps:
  • the set of extruded filaments are tensioned and wound; wherein the filament comprises an interior layer of W/PP and an external layer of PP.
  • the raw material comprises between 92% and 95% (m/m) of tungsten and between 5% and 8% (m/m) of polypropylene .
  • the additional PP is added in a proportion between 5% and 47% (m/m) per 53% to 95% (m/m) of W/PP pellets.
  • the filament comprises between 50.4 and 90.35% of total tungsten and between 49.6 and 9.7% of total polypropylene.
  • the raw material W/PP comprises a particle diameter of less than 5.0 pm.
  • the raw material W/PP is dried for 3 to 5 hours between 70 and 90°C prior to the extrusion method.
  • the filaments are combined with cotton filaments in a 1:1 ratio.
  • the additional PP is combined with elastomer in a proportion of 20% (m/m) of elastomer to 80%
  • the speed of the weaving coils is between 100 and 2500 m/min.
  • the maximum pressure in the spinneret is of 3xl0 7 Pa.
  • the pump flow of the extruder is between 0.60 and 2.92 cm 3 per rotation.
  • the temperature of the fusion threads is between 205 and 220°C. In one embodiment the speed of the extruders is between 8.7 and 14.6 rotations per minute.
  • the filaments are cooled until a temperature between 20 and 25°C.
  • the present application further refers to structures produced from the textile material consisting of a mesh.
  • the present application further refers to structures produced from the textile material consisting of a fabric.
  • the present application further refers to clothing articles for radiation protection produced from the textile material being selected from gown, apron, skirt, thyroid protector, gloves.
  • Document US20110163248A1 describes the development of protective garments against X rays comprising several layers: two or more layers of a sheet or film having a polymeric base, being at least one barrier layer containing an element with atomic number equal or higher than 55 and at least one layer being a secondary layer containing an element with atomic number at least equal to 48.
  • the barrier layer may contain elements such as gadolinium, lanthanum, cerium, barium and cesium.
  • the approach previously described consists in the use of layers with different compositions, instead of the one herein proposes, in which the metal that works as a barrier is incorporated in a matrix, being formed by one sole layer.
  • Patents US7897949B2 and US7449705B2 claim a protective material consisting of, at least, two individual composite layers. Each layer consists of a secondary layer containing a material with low atomic number and a barrier layer containing a material with high atomic number.
  • the barrier layer comprises a layer of 0.5 kg/m 3 of bismuth, dispersed in an elastomeric matrix.
  • the secondary layer contains a layer of 0.9 kg/m 3 of a tin/gadolinium mixture dispersed in an elastomeric matrix.
  • the tungsten is not contemplated as metal. Additionally, they are based on the use of multiple layers with different compositions, thus differing from the proposed new approach.
  • the polymeric component is an elastomer and not a thermoplastic
  • the process of extrusion is used to make sheets and not threads
  • these sheets are subsequently combined with fabric
  • the proposed approach contemplates the forming of fabrics or knits based on the polymeric yarns produced by extrusion.
  • Document WO2013023167A1 belongs to Hologenix and describes the methods for producing fibers, films and light coatings that protect against x rays and gamma rays.
  • the product is a two-layer component where the polymeric matrix is present in the two layers; however, only the central layer has the protective compounds that absorb radiation.
  • the materials described include the following elements: gadolinium (Gd), boron-10 (10B), samarium (Sm) or europium (Eu).
  • Gd gadolinium
  • Sm samarium
  • Eu europium
  • the lead oxide is applied to a fabric or sheet of synthetic vinyl.
  • the protection is achieved mainly using aprons with lead of 0.25 or 0.5mm in thickness, which are capable of mitigating 90% and 99% of the incident radiation dosage, respectively.
  • the present technology refers to the production of a material capable of protecting cells from the harmful action of the x ray radiation, that are, simultaneously, light and adaptable to the human body, enabling more mobility and comfort to the users.
  • the present application refers to a method for producing a textile material for radiation protection from the extrusion of metal/polymer particles for production of filaments and subsequent forming of fabrics and/or knit based on these filaments.
  • Figure 1 Schematic representation of a cross section of a tungsten filament where (1) represents the cross section of the W/PP and additional PP filament, where W/PP is found in the internal layer (2) and the additional PP in the external layer (3).
  • Figure 2 Schematic representation of a cross section of a tungsten filament with polypropylene and elastomer where (4) represents the cross section of the W/PP and additional PP filament, where W/PP is in the internal layer (2) and the additional PP with elastomer is on the external layer (5).
  • Figure 3 Schematic representation of the extrusion of filaments of W/PP and additional PP or PP/additional Elastomer, where the reference numbers represent: extrusion equipment and spinneret (6); hopper (7) and (8); fusion threads (9) and (10); delivery pumps (11) and (12); spinneret (13); cooling zone (14); weaving coils (15), (16) and (17); coil (18); filament (19).
  • Figure 4 microscopic images with 75x (A) and lOOOx (B) enlargement of a metal/polymer pellet.
  • the present application describes the production of textile materials, including fabrics and meshes, based on filaments with a polymeric and metallic composition.
  • the tungsten (W) herein proposed as an alternative to lead is a transition metal characterized by a high density, high break resistance and high fusion point, which in this manner guarantees its stability during the extrusion process here described.
  • the tungsten also presents an excellent performance in the absorption of the electromagnetic radiation, x rays and Gamma rays, due to the high atomic mass and density.
  • the textile material produced from the present method are metal/polymer filaments.
  • the raw material used in the method consists of a mixture of tungsten (W) and polypropylene (PP) (W/PP) in the form of a pellet and additional polypropylene (PP) to confer more stability and maneuverability to the filament.
  • the tungsten pellets comprise between 92% and 95% (m/m) of tungsten and between 5% and 8% (m/m) of polypropylene.
  • the additional polypropylene is added in a proportion between 5% to 47% (m/m) by 53% to 95% (m/m) of W/PP pellets.
  • the filaments produced from the present method comprise the W/PP mixture in the internal layer, and the additional PP forms the external layer of the filament, as shown in Figures 1 and 2.
  • the filaments present a total tungsten composition between 50.4 and 90.3% and between 49.6 and 9.7% of the total polypropylene .
  • polypropylene allows for the raw material to be extruded, thus enabling forming the metal/polymer filaments.
  • the distribution and dimension of the tungsten particles in the raw material was assessed resorting to the SEM - Scanning electron microscopy as shown in Figure 4.
  • the analyses were carried out resorting to backscattering electron - BSE that allows to obtain high contrast images.
  • the retrodispersion electrons of the elements with high molecular masses reflect the light with more intensity and, consequently, present more brilliance in the final image, facilitating the distinction between areas with different chemical compositions.
  • it was possible to validate that the tungsten particles are not only well distributed in the polypropylene matrix but also present a variable dimension, with their diameters comprised between 0.8 and 5.4 pm and, therefore, mostly within the specification imposed of ⁇ 5.0 pm.
  • melt flow index (MFI) of the polymer/metal compound relevant value for evaluating the suitability of the same to the extrusion method, is situated between 63.77 and 64.89 grams per 10 minutes. This study was carried out according to the ASTM D1238-13 (2013) norm: Standard test method for melt flow rates of thermoplastics by extrusion plastomers.
  • the above indicate range was calculated through the average values obtained in three different assays carried out on 3 samples of approximately 25 g each.
  • the tests were carried out applying a constant load of 2.16 kg at a temperature of 210°C.
  • the maximum test time did not exceed 7 minutes, such as recommended by norm, as well as 2 minutes purge after the pre-heating of the material.
  • the melt flow index was therefore determined as from the quantity of material extruded per unit of time, being expressed in grams for 10 minutes (g/10 min).
  • the W/PP pellets can be dried between 3 and 5 hours, between 70 and 90°C, prior to the extrusion method.
  • the method for production of filaments from W/PP pellets and additional PP is carried out in an extrusion equipment and spinneret (6) and according to the following parameters:
  • the extrusion method comprises the following steps:
  • feed the raw material W/PP and additional PP are provided to the extrusion equipment and spinneret; this step occurs by gravity as from a hopper, the W/PP is fed to the extruder from a hopper and the additional polypropylene is fed to the extruded from another hopper; (7), (8) in Figure 3;
  • the W/PP raw material is used in the form of granulate.
  • the W/PP raw material is used in the form of dust.
  • the raw material W/PP is used in a size less than 5 pm.
  • the additional PP is used in the form of granulate.
  • the spinneret may present different configurations, such as number and dimension of the orifices, thus resulting in enormous multiplicity of configurations of the material.
  • cooling after passing through the spinneret the filaments are cooled until the temperature between 20 and 25°C in the cooling zone (14).
  • the cooling is made with the help of a bath of water.
  • tungsten mass compositions between 82.7 and 90.3%.
  • the mass concentrations of polypropylene are situated between 8.8% and 14.8%.
  • the mass concentrations of elastomer are situated between 1.0% and 2.6%.
  • the W/PP filaments, after the extrusion method, are coiled.
  • the W/PP filaments are combined with cotton filaments, giving them more resistance and more softness.
  • the cotton filament is added to the compounds containing mass percentages of tungsten equal to or higher than 87.4% (W + PP) or equal to 90.3% (W + PP + elastomer).
  • elastomer is added to the additional PP.
  • the elastomer is added in a percentage of 80% (m/m) of additional PP and 20% (m/m) of elastomer.
  • the cotton filaments are added to the filaments after extrusion in a 1:1 ratio.
  • the structure is a mesh. In another embodiment the structure is a fabric.
  • the clothing articles for radiation protection may be gown, apron, skirt, thyroid protector, gloves.
  • the meshes have simple mesh knitting structure (jersey knit) and were produced in Tricolab equipment by Sodemat.
  • the jersey knit structure is also known as simple knit, having distinct left and right sides, with fine ribs that extend longitudinally along the face of the fabric.
  • the fabric was made with filaments in the configuration shown in Figure 1, having 90.3% tungsten mass, as "2x2 basket weave” structure.
  • the basket weave structure is fundamentally the same as that of the simple knit, however, two or more web fibers interweave alternatively with two or more meshed fibers.
  • a two-web arrangement that crosses two meshes is designated as basket 2 x 2.
  • Table 1 Table 1
  • the meshes and the fabric developed were characterized with respect to their mitigation abilities, using simple and double configuration, that is, testing the mitigation capacity of 1 layer and 2 layers, Table 2. These studies were carried out in a GE brand equipment, model OEC Fluorostar. 0 intensifier, on x ray mode, was used on 80, 95 and 110 kV voltages. For comparison an apron with 0.5 mm of lead was also tested.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Artificial Filaments (AREA)

Abstract

La présente invention concerne le développement de matériaux pour la protection radiologique qui sont des solutions alternatives au plomb, sur la base de l'extrusion de particules de polymère/métal et la formation ultérieure de tissus et/ou de mailles sur la base de ces fils. Dans un aspect plus concret, la présente invention concerne l'utilisation de composés à base de granulés de tungstène avec du polypropylène. De cette manière, l'utilisation du plomb, qui est connu pour être toxique, en particulier dans l'environnement, est éliminée et la matière alternative décrite dans la présente invention, le tungstène avec un polymère, peut être appliquée à des articles vestimentaires pour la protection radiologique, tels que des blouses ou des tabliers. Une extrudeuse bi-vis (6) est utilisée, comportant une trémie d'alimentation (7) pour un mélange de pastilles de tungstène et de polypropylène, une trémie d'alimentation (8) pour le polypropylène, deux vis (9, 10), des pompes (11, 12) et une filière (13). Le filament extrudé peut comporter un noyau (2) avec du tungstène et du polypropylène et une enveloppe (3) de polypropylène, qui peut également être une enveloppe (5) de polypropylène avec un élastomère.
PCT/PT2019/050046 2019-12-30 2019-12-30 Procédé de fabrication d'un matériau textile pour la protection radiologique WO2021137709A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/PT2019/050046 WO2021137709A1 (fr) 2019-12-30 2019-12-30 Procédé de fabrication d'un matériau textile pour la protection radiologique

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US744970A (en) 1903-07-22 1903-11-24 James H Huntington Block-mold.
US20050121631A1 (en) 2003-12-05 2005-06-09 Lagace Arthur P. Low-weight ultra-thin flexible radiation attenuation composition
US7449705B2 (en) 2003-09-03 2008-11-11 Mavig Gmbh Lead-free radiation protection material comprising at least two layers with different shielding characteristics
WO2010145082A1 (fr) 2009-06-15 2010-12-23 北京化工大学 Matériau composite caoutchouc sans plomb protecteur contre les rayons x
US7897949B2 (en) 2006-06-23 2011-03-01 Mavig Gmbh Laminated lead-free X-ray protection material
US20110163248A1 (en) 2009-12-30 2011-07-07 Beck Thomas J Multi-layer light-weight garment material with low radiation buildup providing scattered-radiation shielding
WO2013023167A1 (fr) 2011-08-10 2013-02-14 Hologenix, Llc Fibres et compositions légères de protection vis-à-vis du rayonnement gamma et des rayons x
WO2015019141A1 (fr) * 2013-07-25 2015-02-12 Rodrigues Michael Bastiao Fibres, filaments, et textiles radio-opaques
US20150287485A1 (en) 2012-12-18 2015-10-08 Centre for Materials for Electronics Technology (C-MET) X-ray shielding material and method of preparation thereof
US9754690B2 (en) 2012-10-31 2017-09-05 Lite-Tech, Inc. Flexible highly filled composition, resulting protective garment, and methods of making the same

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US744970A (en) 1903-07-22 1903-11-24 James H Huntington Block-mold.
US7449705B2 (en) 2003-09-03 2008-11-11 Mavig Gmbh Lead-free radiation protection material comprising at least two layers with different shielding characteristics
US20050121631A1 (en) 2003-12-05 2005-06-09 Lagace Arthur P. Low-weight ultra-thin flexible radiation attenuation composition
US7897949B2 (en) 2006-06-23 2011-03-01 Mavig Gmbh Laminated lead-free X-ray protection material
EP2033198B1 (fr) 2006-06-23 2014-03-05 Mavig GmbH Matériau de protection contre les rayons x sans plomb revêtu
WO2010145082A1 (fr) 2009-06-15 2010-12-23 北京化工大学 Matériau composite caoutchouc sans plomb protecteur contre les rayons x
US20110163248A1 (en) 2009-12-30 2011-07-07 Beck Thomas J Multi-layer light-weight garment material with low radiation buildup providing scattered-radiation shielding
WO2013023167A1 (fr) 2011-08-10 2013-02-14 Hologenix, Llc Fibres et compositions légères de protection vis-à-vis du rayonnement gamma et des rayons x
US9754690B2 (en) 2012-10-31 2017-09-05 Lite-Tech, Inc. Flexible highly filled composition, resulting protective garment, and methods of making the same
US20150287485A1 (en) 2012-12-18 2015-10-08 Centre for Materials for Electronics Technology (C-MET) X-ray shielding material and method of preparation thereof
WO2015019141A1 (fr) * 2013-07-25 2015-02-12 Rodrigues Michael Bastiao Fibres, filaments, et textiles radio-opaques

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