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1. (WO2019066732) A METHOD FOR MOLD-FREE MANUFACTURING OF NATURAL RUBBER ARTICLES
Latest bibliographic data on file with the International BureauSubmit observation

Pub. No.: WO/2019/066732 International Application No.: PCT/TH2018/000040
Publication Date: 04.04.2019 International Filing Date: 07.09.2018
IPC:
B29C 64/124 (2017.01) ,B29C 64/135 (2017.01) ,B29C 35/00 (2006.01) ,B33Y 30/00 (2015.01)
[IPC code unknown for B29C 64/124][IPC code unknown for B29C 64/135]
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
35
Heating, cooling or curing, e.g. crosslinking, vulcanising; Apparatus therefor
[IPC code unknown for B33Y 30]
Applicants:
NATIONAL SCIENCE AND TECHNOLOGY DEVELOPMENT AGENCY [TH/TH]; 111 Thailand Science Park, Phahonyothin Road, Klong 1, Klong Luang, Pathumthani, 12120, TH
Inventors:
WIROONPOCHIT, Panithi; TH
SRISAWADI, Sasitorn; TH
DOKKHAN, Sopita; TH
MUNNAE, Jomkwun; TH
LAPAPONG, Sittikorn; TH
LOYKULNANT, Surapich; TH
NAEWNGERNDEE, Rattanasuda; TH
UTRA, Kittaporn; TH
Agent:
RUANGSIN, Ratchada; 111 Thailand Science Park, Phahonyothin Road, Khlong 1, Khlong Luang, Pathumthani, 12120, TH
Priority Data:
170100576628.09.2017TH
180100321701.06.2018TH
180100321801.06.2018TH
Title (EN) A METHOD FOR MOLD-FREE MANUFACTURING OF NATURAL RUBBER ARTICLES
(FR) PROCÉDÉ POUR LA FABRICATION D'ARTICLES EN CAOUTCHOUC NATUREL SANS MOULE
Abstract:
(EN) This invention relates to the method for mold-free manufacturing of natural rubber articles. Specifically, the articles can be fabricated in the stereolithography process which eliminates the need of mold making and reduces the process time significantly. The method comprises the steps of (1) preparing prevulcanized latex compound for sulfur and non-sulfur vulcanization; (2) adding processing aid to make the latex compound curable when exposed to laser irradiation, the processing aid includes heat-sensitive polymer and/or carbon material(s); and (3) fabricating of three-dimensional rubber articles by stereolithography process. The process are capable of fabricating complex shapes and internal features. As the said rubber articles contain more than 95% of natural rubber, they are highly flexible and can be translucent in some embodiments.
(FR) La présente invention concerne un procédé pour la fabrication d'articles en caoutchouc naturel sans moule. Plus précisément, les articles peuvent être fabriqués par un processus de stéréolithographie qui élimine le besoin de fabrication de moule et réduit considérablement le temps de traitement. Le procédé comprend les étapes consistant à (1) préparer un mélange de latex prévulcanisé pour la vulcanisation avec du soufre et sans soufre ; (2) ajouter un adjuvant de fabrication pour rendre le mélange de latex durcissable lorsqu'il est exposé à un rayonnement laser, l'adjuvant de fabrication comprenant un polymère thermosensible et/ou une ou plusieurs matières carbonées ; et (3) fabriquer des articles tridimensionnels en caoutchouc par un processus de stéréolithographie. Le procédé permet de fabriquer des formes complexes et des éléments caractéristiques internes. Étant donné que lesdits articles en caoutchouc contiennent plus de 95 % de caoutchouc naturel, ils sont hautement flexibles et peuvent être translucides dans certains modes de réalisation.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)