Product Categories
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Mixing and Extrusion Test (Lab Plastomill)
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MFR・MVR (Melt Indexer)
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Melt viscosity, melt tension, die swell (capillary rheometer)
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Tension, Compression, Bending (Universal Testing Machine)
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Tensile and bending test (fully automatic)
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Impact test
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Friction coefficient
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Wear test
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Fatigue, bending, creep test
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Tear, burst, and stiffness tests
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Heat Deflection Temperature (HDT・DTUL) and Vicat Softening Temperature
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Weather resistance test
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Heat aging (gear oven) and ozone aging
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Low temperature test
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Combustibility and Heat Generation Test
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Permeability, air permeability, gas/water vapor permeability
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Vulcanization test, Mooney viscosity, blow point
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Rebound elasticity and permanent strain
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Adhesion (Tack Tester)
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Density (specific gravity)
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Thickness and hardness
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Coating, paint, and ink testing
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Fiber and Leather Testing
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Paper, board, and cardboard testing
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Specimen preparation and adjustment
Featured products
Products/Services(187items)
news list
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Notice of Temporary Suspension of Our Company's Website
We would like to express our sincere gratitude for your continued patronage. Currently, we have confirmed a vulnerability in the system (PHP) used on our company website, and we are temporarily suspending the website's publication to conduct security maintenance for safety assurance. At this time, no damage has been confirmed, but we will continue maintenance efforts until safety is fully secured. We deeply apologize for the significant inconvenience and concern this may cause our users. We will inform you again as soon as we have a timeline for resuming operations. We kindly ask for your understanding and cooperation.
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Notice of Summer Vacation
Thank you very much for your continued support. We would like to inform you that our company will be closed during the following period: Closure Period: August 8 (Saturday) to August 16 (Sunday), 2026 Inquiries received during the closure period will be answered sequentially after August 17 (Monday). We apologize for any inconvenience this may cause and appreciate your understanding.
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New product: Laboplast Mill Micro 4N100 now on sale.
We started selling the new product, Laboplast Mill Micro 4N100, on September 10, 2025. Like the previous model, Laboplast Mill Micro, it allows for the evaluation of mixing and extrusion characteristics with a small amount of resin. While maintaining compatibility, we have reviewed the torque detection mechanism and control method, making it easier to use and enabling more reproducible prototypes than the previous model. We also have a physical unit available at our Tokyo factory, so please feel free to contact us.
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Notice of Summer Vacation
Thank you very much for your continued support. We would like to inform you that our company will be closed during the following period: Closure Period: Saturday, August 9, 2025 – Sunday, August 17, 2025 Inquiries received during the closure period will be answered sequentially after Monday, August 18, 2025. We apologize for any inconvenience this may cause and appreciate your understanding.
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Notice of Summer Vacation
Thank you very much for your continued support. We would like to inform you that our company will be closed during the following period: Closure Period: August 11 (Friday) to August 20 (Sunday), 2023 Inquiries received during the closure period will be answered sequentially after August 21 (Monday). We apologize for any inconvenience this may cause and appreciate your understanding.
About東洋精機製作所
Comprehensive manufacturer of material testing machines and environmental testing equipment.
Toyo Seiki Seisakusho Co., Ltd. is a comprehensive manufacturer of various material testing machines and environmental testing equipment targeting fields such as plastics, rubber, paints, paper, and textiles. Since its founding in 1934, we have been dedicated to "testing machines" and have supported our customers' research and development and quality control across various fields. We will continue to refine our technical capabilities and respond to our customers' needs. 【Product Development Timeline】 1955: Thermoplastic Resin Fluidity Tester 'Melt Indexer' 1960: Universal Material Testing Machine 'Strograph' 1963: Curing Tester 'Oscillating Disk Rheometer (ODR)' 1970: Mixing and Extrusion Testing Equipment 'Lab Plastmill' 1982: Capillary Rheometer 'Capillograph'



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