Polyimide tape

Polyimide tape is a critical, high-performance material known best by the trade name Kapton.Unlike ordinary tapes designed for bonding or low-temperature masking, polyimide tape is anengineered polymer designed to maintain its integrity, strength, and electrical properties underconditions that would instantly melt, brittle, or degrade almost any other plastic or adhesive. itskey properties include extreme thermal endurance (withstanding temperatures well over260°C), superior electrical insulation (high dielectric strength), and exceptional chemicalresistance. These characteristics make it indispensable for applications such as maskingprinted circuit boards (PCBs) during wave soldering, insulating coils in high-performancemotors, and protecting components in aerospace and cryogenic systems.

Production Process Flow

From raw materials to finished product, every step is rigorously controlled to ensure consistent and reliable performance.

1. Film Preparation

Selecting and preparing high-quality polyimide base film with precise thickness and structural uniformity.

2. Adhesive Coating

Evenly applying specialized heat-resistant adhesive onto the polyimide film for robust bonding and long-term stability.

3. Drying & Curing

Precisely regulating temperature and duration to dry and cure the adhesive, optimizing adhesion strength and thermal endurance.

4. Slitting & Rewinding

Cutting the cured tape into customized widths and rewinding into finished rolls for convenient use in various electronic applications.

KA08F7

KA06F30

KA04F17

KAO5F15

KA03F11

Polyimide tape Series Specification Sheet

Effective Width (MM)		Subject to actual shipment specifications
ITEM UNIT	KA08F7	KA06F30	KA04F17	KAO5F15	KA03F11	TEST METHOD
Dimension & Tolerances / Product Dimension
1. Color	Brown	Brownish gray	Brown	Brown	Brown
2. Thickness (MM)	0.090±0.005	0.057±0.002	0.040±0.002	0.050±0.005	0.038±0.005	GB/T 7125-1999
3. Inside Diameter of Roll (MM)	77±1	77±1	77±1	77±1	77±1
4. Length (M)	100	Customized	Customized	100	100
Composition / Product Design
1. Backing	PI	PI	PI	PI	PI
2. Backing Thickness (MM)	0.050	0.025	0.025	0.025	0.025	GB/T 7125-1999
3. Adhesive	Silica gel	Silica gel	Silica gel	Silica gel	Silica gel
Physical & Chemical Properties / Technical Data
1. Tack (N/24MM)	≥1			≥1	≥2	GB/T 3125-2014
2. 180° Peel adhesion (N/25MM)	≥3	≥8	≥3	≥5	≥1	GB/T 2792-1998
3. Holding Power (Hr)	≥4	≥4	>12	≥12	≥4	GB/T 4851-1998
4. Tensile Strength (MPa)	≥70	≥60	≥60	≥70	≥70	GB/T 7753-87
5. Elongation (%)	≥50	≥20	≥20	≥35	≥60	GB/T 7753-87
6. Temperature resistance (℃)	260°C (0.5h no residual glue)	200°C/30mins (No residual glue)	260°C /30mins (No residual glue)	260°C (0.5h no residual glue)	260°C (0.5h no residual glue)

Technology Showdown: Polyimide Tape vs. Ordinary Tape

The primary alternative to polyimide tape in many bonding/insulating tasks is ordinary tape (e.g., PVC, general adhesive tape). While both fulfill basic adhesion or insulation needs, their differences in thermal endurance, reliability, and precision profoundly impact performance in electronic and industrial applications.

Polyimide Tape

Extreme Heat Resistance: Withstands up to 260℃+, making it vital for reflow soldering, high-temperature baking, and aerospace-grade thermal environments.
Superior Electrical Insulation: Maintains strong dielectric strength, ideal for PCB insulation, lithium battery tabs, and semiconductor packaging.
High Durability: Resists chemicals, abrasion, and tearing, ensuring long-term reliability in harsh manufacturing or operational conditions.
Precision-Centric Design: Thin yet robust structure enables use in delicate tasks like flexible circuit bonding or micro-component fixing.
Higher Cost: Premium performance comes at a higher price compared to ordinary tapes.

Ordinary Tape (e.g., PVC, General Adhesive Tape)

Low Heat Resistance: Degrades or fails at temperatures often <100℃, unusable in electronic manufacturing’s high-heat processes (e.g., soldering).
Unstable Insulation: Loses insulating properties under heat or prolonged use, increasing risk of short circuits or component failure.
Poor Durability: Prone to tearing, adhesive breakdown, or damage from chemicals, limiting use in rigorous industrial scenarios.
Lower Upfront Cost: Affordable for low-heat, non-critical tasks like general labeling or temporary low-stress bonding.

Functions, Uses, and Applications

Polyimide tape is an indispensable material in electronic manufacturing. Its core function is to ensure reliability and performance of electronic components via excellent thermal resistance, insulation, and adhesion throughout complex production workflows.

Application of polyimide tape in automobiles

Surface Protection

Prevents scratches, solder splashes, and damage to PCB surfaces, battery tabs, etc. during soldering, reflow, and assembly, while heat resistance blocks molten solder and debris.

Process Isolation

Masks and protects designated areas from high temperatures, chemical exposure, or electrical interference during PCB manufacturing, semiconductor packaging, and high-heat bonding operations.

Temporary Fixing

Provides temporary adhesion and positioning for delicate electronic parts (such as flexible circuits, small modules) during automated processing or manual assembly, enabling stable handling.

Primary Application Fields

Our product is widely used in the manufacturing and assembly of various electronic and industrial systems:

Printed Circuit Boards (PCBs) & Flexible Circuits
Lithium Battery Production (tabs, modules, cell packaging)
Semiconductor Manufacturing (wafer processing, chip packaging)
High-Temperature Industrial Applications (oven baking, solder masking)
Aerospace & Automotive Electronics (heat-resistant wiring, component insulation)

Quality Standards & Certifications

We are committed to delivering the highest quality products, a promise backed by strict internal standards and authoritative third-party certifications.

Appearance Standard

Tape surface is smooth and free of defects like bubbles, scratches, or impurities. Edges are clean with no adhesive bleed.

Performance Consistency

Each batch is tested for key performance indicators like peel strength to ensure stable and reliable performance.

Dimensional Tolerance

Strict control over width and thickness tolerances ensures high consistency for automated production lines.

Third-Party Inspection & Certification

ISO 9001:2015

Quality Management System certification, demonstrating our ability to consistently produce high-quality products.

RoHS Directive

Products are free of hazardous substances, complying with EU environmental standards for user and environmental safety.

REACH Regulation

Compliant with EU chemical regulations, ensuring a high level of protection for human health and the environment.