Technologies

Oak-trees,Inc. is dedicated to developing technologies for film processing and tape processing to solve issues related to tape and film for electric wires. As a tape processing manufacturer that tackles challenging problems, we provide unique value to our global partners that other companies cannot offer. If you have any issues, please feel free to consult with us.

Challenges addressed
through technology development

  • Heat resistance
  • Electrical insulation
  • Dielectric properties
  • Weather resistance
  • Flame retardancy
  • Processability
  • Durability
  • Miniaturization and weight reduction
  • Cost reduction

Scope of technology development

Our company handles everything from the research and development of adhesives and substrates to the development of processing technologies, including micro-slit processing and lamination processing.

Scope of technology development

Our proprietary technologies

Micro-slit processing of thin films with a thickness of 2.5 µm

Micro-slit processing of thin films with a thickness of 2.5 µm | Technologies

<Our proprietary technologies>

●Customized equipment specialized for processing ultra-thin film
●Condition setting and processing know-how cultivated through years of thin film processing
●Quality assurance through our extensive inspection facilities

Why is the processing of thin film considered to be highly difficult?
(1) The thinner the film, the more difficult it is to handle.
(2) Film transport is unstable and accuracy varies.

When the film thickness reaches 2.5㎛, it is difficult to handle with ordinary microslitters, and the accuracy is not stable. For this reason, we have installed our own custom-made microslitters to handle 2.5㎛ film processing, enabling us to set conditions specifically for low-tension conveyance and thin films.
The power of our custom-made microslitters and the processing technology we have cultivated over the years enable us to achieve high-precision, high-quality processing of thin-film films.

We provide high-quality products to our customers by possessing digital microscopes, image dimensional measuring instruments, and laser elemental analyzers to ensure quality.

<Using for>

Material: PET ⇒ Application: Ultrafine coaxial cables
Material : PET PP ⇒ Application : Film capacitor
Material: PET ⇒ Application: Jig for adjusting percussive force for film processing

Finishing of long lengths exceeding 20,000 meters

Finishing of long lengths exceeding 20,000 meters | Technologies

<Our proprietary technologies>

●Custom-developed cores capable of handling long rolls of 20,000 m or more
●Technology capable of handling film processing with a thickness of 2.5 μm

We develop custom-made cores to accommodate long rolls of 20,000 m or more. We have not only one type of custom-ordered cores, but also multiple types of cores to meet customers’ requirements such as roll volume and roll shape.
In addition, we often receive requests for long rolls, especially for thin film, but the thinner the film, the more difficult it is to handle and the more likely it is to lose its final shape when rolled.
We have expertise in low-tensile processing and can provide high-quality final products in rolls of 20,000 m or more.

<Using for>

Material: PET ⇒ Application: Ultrafine coaxial cables
Material : PET PP ⇒ Application : Film capacitor
Material: PET ⇒ Application: Jig for adjusting percussive force for film processing

t2.5㎛ PET film coating process

t2.5㎛ PET film coating process | Technologies

<Our proprietary technologies>

●Possesses know-how of film winding and conveying at low tension
●Small coating machines capable of coating narrow 80 mm widths
●Development capability to thoroughly coordinate specifications with material manufacturers, even for difficult specifications
●Appropriate temperature and humidity control of materials for stable and accurate processing

Film coating processing refers to the application of adhesives and other materials to film substrates. When coating processing ultra-thin materials with a thickness of 2.5 µm, thin films are sensitive to tension and are difficult to control, requiring detailed adjustment of processing conditions. Kashinoki’s coating equipment is capable of low tension control and is suitable for processing thin materials. The conditions under which ink dries are also defined in detail, enabling processing without thermal shrinkage or thermal stress. This allows us to provide products that maintain elongation and strength.

<Using for>

Material: PET ⇒Application: Ultrafine coaxial cables
Material: PET PP ⇒Application: Film capacitor
Material: PET ⇒Application: Film processing jig for percussion adjustment

 

 

Thin laminate processing (2.5µPETx6µCU)

Thin laminate processing (2.5µPETx6µCU) | Technologies

<Our proprietary technologies>

●Realization of ultra-thin laminate processing using custom equipment specialized for low tensile strength
●Establishment of appropriate processing conditions and quality evaluation with our well-equipped inspection and analysis equipment
●Selection capability based on extensive knowledge of ink characteristics through our accumulated development experience

Thin laminate processing utilizes precision coating technology. Typical laminate processing issues include (1) adjusting the specifications of materials such as film and adhesive, and (2) establishing and managing appropriate processing conditions.

For issue (1), we work closely with material manufacturers in the development stage to select appropriate materials.

For issue (2), we utilize our accumulated development know-how to establish ink drying conditions and appropriate winding conditions to realize proposals that meet customer requirements.

 

<Using for>
Material: PET Applications: Ultrafine coaxial cables
Material: PET Purpose: Jig for adjusting perpendicularity for film processing
Material: PET x NY Usage: Packaging material
Material: PET x CU Application: Noise shielding film for ultra-small space

Minimum width 0.6mm Narrow slit processing of adhesive tape

Minimum width 0.6mm Narrow slit processing of adhesive tape | Technologies

<Our proprietary technologies>

●We have built a processing line specialized for adhesive tapes, enabling high-quality slit processing without being affected by adhesive agents.
●Cutting blades are treated to avoid adverse effects of adhesive agents.

The following are the common problems with slit processing of adhesive tape

(1) Adhesive adhesive adhering to the cutter and rolls, resulting in poor quality.
(2) Decrease in processing accuracy

In order to avoid the adverse effects of adhesive, we have built a processing line specialized for adhesive tape. In addition, we apply a release treatment to the blades to prevent quality deterioration due to adhesive adhesion.

Regarding (2), we use the rewind slitting process for processing narrow widths of adhesive tape, rather than the general plunge slitting process, to achieve high-precision film processing.

<Using for>

Capacitors for Automotive

Our equipment and facilities

In addition to the aforementioned technical capabilities, we meet your requirements through the following equipment and facilities that we possess:

List of Processing Equipment

Slitter Equipment

NoRoll
Width
Unwinding
Load
Capacity
Winding
Load
Capacity
Unwind
Inch
Unwound
Product
Outer Diameter
Maximum Outer
Diameter of
Wound Product
Winding
Inch
Minimum
Achieved
Width
1580mm--3Inch400φ300φ1Inch
2Inch
3Inch
3mm(G5)
2580mm--3Inch400φ300φ1Inch
2Inch
3Inch
6mm(ALPET)
3780mm 200kg-3Inch
6Inch
12Inch
500φ(560φ)500φ3Inch
6Inch
3mm(PET9)
4660mm150kg-3Inch
6Inch
500φ400φ3Inch80mm~
5660mm150kg-3Inch
6Inch
500φ400φ3Inch3.5mm(metal)
6660mm150kg52kg3Inch
6Inch
500φ400φ3Inch3.5mm(PET9)
71300mm300kg42kg3Inch
6Inch
500φ~600φ500φ3Inch80mm~
81200mm500kg170kg3Inch
6Inch
700φ400φ3Inch-
9300mm--3Inch270φ200φ3Inch-

Micro Slitter Equipment

NoRoll
Width
Unwinding
Load
Capacity
Winding
Load
Capacity
Unwind
Inch
Unwound
Product
Outer Diameter
Maximum Outer
Diameter of
Wound Product
Winding
Inch
Minimum
Achieved
Width
1180mm40kg-3Inchφ500Φ120 (Φ140 if no guide)ID30.3Inchtext
2120mm--3Inchφ360-ID30.3Inch1.6
3180mm--3Inchφ520-ID300.6
4180mm--3Inchφ540-ID300.6
5180mm40kg5kg3Inchφ580φ120ID30.3Inch0.6
6180mm40kg5kg3Inchφ580φ120ID30.3Inch0.6
7180mm40kg5kg3Inchφ580φ120ID30.3Inch0.6
8180mm40kg5kg3Inchφ580φ120ID30.3Inch0.6
9350mm200kg5kg3Inchφ800φ300P-30.3Inch-
10---3Inchφ320-P-30.3Inch-

Coating Equipment

Equipment NameSubstrate WidthUsing for
Large Coating Machine500mm~1080mmGravure Coating, Dry Lamination
Small Coating Machine80mm~500mmGravure Coating, Knife Coating,
Dry Lamination

Heat Laminator

NoUsage
Temperature
Preheat Roll
Temperature
WidthCore
Diameter
Maximum Original
Roll Diameter
(Substrate Side)
Maximum Original
Roll Diameter
(Dry Side)
Maximum
Winding
Diameter
Pressurization
Method
1Max150℃100℃550mm3Inch(6Inch for Raw material side)φ700φ500φ350Air Cylinder

Rewinder

Roll
Width
Unwinding DiameterWinding DiameterStrap Winding DiameterCore DiameterTensionLoad Capacity
200mmφ450mmφ350mmφ450mm3Inch10~40N30kg

List of Inspection Equipment

Equipment NameManufacturer NameModel Number
Digital MicroscopeKEYENCE CORPORATIONVHX-7000
Ultra-Depth Multi-Angle LensKEYENCE CORPORATIONVHX-D510
Shape Analysis Laser MicroscopeKEYENCE CORPORATIONVK-X1000
Laser Element Analysis HeadKEYENCE CORPORATIONEA-300
Image Dimension Measurement DeviceKEYENCE CORPORATIONIM-8030
Dielectric Measurement DeviceAET, Inc.Cavity Resonator