Toyo Kohan Co., Ltd. Kudamatsu Plant

The Kudamatsu Plant – Pioneering theway to a world of possibilities

This plant has all the facilities that ensure stable supply of high-quality products in response to customers’ needs.
Ranging from R&D to manufacturing, shipment and environmental protection, these facilities include a technicalresearch laboratory, production lines, port facilities for directly shipping products and bringing in raw and auxiliarymaterials, and an environmental management center.

HealthManagementCenterLaboratory

To Hikari

Main OfficeNo. 3 Electrolytic Tinning Linena n
No. 3 Ni-Top LineNo. 2 Preparation LineNo. 1Temper Mill

Slitting LineNo. 1 Silver Top LineNo. 2 Ni-Top LineNo. 1 Preparation Line
Scroll Shear LineNo. 2Temper MillNo. 2 Electrolytic Cleaning Line

Slitting Line

Slitting Line

Magnetic disk substrate
manufacturing plant(MD Plant 1 and 2)

No. 3 andNo. 4 Film
Manufacturing
Lines

Environmental

Slitting Line

UH-SL Protection Center

Coil Yard

No. 3 Preparation LineNo. 3 Temper MillNo. 2 Hi-Top Line

Shear LineNo. 3 Hi-Top Line

Shear Line

H. Leveller

No. 3 FPL

No. 2 Continuous Pickling LineNo. 2 Batch Annealing Furnace

No. 4 FPL

ChimneyNo. 5 FPL

No. 2 MAL

No. 2 Continuous Annealing LineNo. 2 Five-Stand Cold MillNo. 3 Continuous Annealing Line

huTo S

Wastewater
Treatment
Facility
Wastewater
Treatment
Facility

Gantry Crane

No. 2 FPL
No. 1 Lamination LineNo. 2DR MillNo. 3DR Mill No. 3 Electrolytic Cleaning Line

Scroll Shear Line

Tinplate
Hi-TopMagnetic disk substrate
manufacturing plant(MD Plant 3 and 4)

No. 1 andNo. 2Film
ManufacturingLines

No. 1 Color Lamination LineNo. 2 Color Lamination LineNo. 2 Lamination LineNo. 3 Lamination Line

Silver-Top
VINYTOP
Ni-TopRe-Coiling LineTOP
Hi-PetGantry Crane

VIEW
VIEW OFOF KUDAMATSU
KUDAMATSU PLANT
PLANT
TOYO
TOYO KOHAN
KOHAN CO.,CO., LTD.
LTD.

Manufacturing Lines for Functional and Other New Materials

Magnetic Disk
Substrates (MD)Fine Cast Film

Cast polyester film (Fine Cast Film)

Magnetic disk substrates are fabricated by mirror polishing nickel-plated aluminum disks. We have a share ofmore than 10% of the world market. Applications haverecently expanded into non-computer fields, such as HDD
video recorders and video game systems.

             

Inner and outer finishing materials forbuildings and appliances (VINYTOP)

Tinplate

Exhaust Pipe (Nickel electroplating)

Refrigerator door materials (VINYTOP)

Inner and outer finishing materials forelectrical equipment (Silver Top)

Square Hole Core Materials (Ni-Top)

Bearing Seals (Silver Top)DNA Chip Substrate (Silver Top)

Polyester film obtained using the cast film-forming method
has processing characteristics not found in general-purpose film, and outstanding adhesion with metal. It is used
as a lamination film for Hi-Pet and VINYTOP.

Our brand symbol “TK WORKS” expresses Toyo Kohan Group’s newattitude toward customers and society, and reflects our strengths andunique attributes. Using the brand symbol as a tool to communicate withsociety and markets around the world, we want to continue offeringsociety lasting value and real benefits.

Magnetic disk substrates (MD)

Inner case materials for batteries(Ni-Top)

Can materials (tinplate, Hi-Top, Hi-Pet)

Surface Treatment and Steel Sheet Manufacturing Lines

Meeting diverse needs with high-quality products by using state-of-the-art equipment and technological skills we have nurtured since our founding

Pickling

Cold Rolling

Cleaning and Annealing

Scale (iron oxide) is removed from the hot coil surface.

Hot coil (1.6 to 3.5 mm thick) is rolled to a thickness of 0.15 to 1.6 mm, depending on the application.

Rolling oil deposited on the coil surface is cleaned off. Then the coil is softly annealed in afurnace.

Temper Rolling andDouble Cold Reduction Surface Treatment
Coils are lightly elongated to have a flat
shape, and are given the appropriate
roughness and hardness.

Various products are produced to suit different applications by performing different types of surface treatment, such as electrolytic tinning,
electrolytic chromic acid treatment and resin lamination. Toyo Kohan’s prowess stands out in this process.

Electrolytic tinning line

Hi-Top line

Tinplate is produced by performing the electric tinplating treatment.

This line performs a special electrolytic treatment that creates astrong coating of metallic chromium and chromium hydroxides.

Silver Top line
Composite electrolytic galvanization is performed using a zincbased electrolyte containing cobalt and molybdenum.

Ni-Top lineThis line performs electroplatingwith nickel. It is possible to create a matte, semi-bright or brightsurface by varying the composition of the electrolyte.

Continuous pickling line

Five-stand tandem cold mill

Inside the continuous annealing furnace

Continuous annealing line

Double cold reduction millLamination line

Control room

Hi-Top line

Lamination line
A polyester film with outstanding
heat resistance, barrier performance and formability is applied
continuously via thermocompression bonding.

Color lamination line
This line applies an organic coating with sophisticated design andfunctionally.

Color lamination lineWelfare Facilities
Toyo Kohan has a full range of welfare facilities, including apartment, company housing, a gymnasium,a hall, baseball field, and tennis courts.

Apartment (single person)

Company Housing

Gymnasium

Health Management
CenterKohan Kindergarten

Company Profile
Established:
Capital:Number of employees:
Offices:
Lines of Business:

April 11, 1934
5,040 million yen
1,300
Head Office (Tokyo), Technical Research Laboratory (Kudamatsu), Branch and Sales
Offices (Osaka, Nagoya, Hiroshima, Fukuoka), Plant (Kudamatsu)
Manufacturing and sales of tinplate, thin sheet steel, all types of surface-treated steel
sheet and all types of functional materials

Kudamatsu Plant
Site area:
530,000 m2
Number of employees: 1,100
Production:
50,000 tons/month
Products:• Tinplate (electrolytically tinned sheet steel)• Hi-Top (tin-free steel)• Hi-Pet (laminated steel sheet)• Silver-Top (composite electro-galvanized steel sheet)• Ni-Top (nickel-plated steel sheet)• VINYTOP (high-grade decorative steel sheet)• TOP (cold-rolled steel sheet, cold-finished steel band, etc.)• MD (magnetic disk substrates)• Fine Cast Film (cast polyester film)

Kudamatsu Plant Main Office