Black Bakelite Sheet

5 month ago

19 0 

2 year

Product details

Bakelite Sheet, also known as phenolic laminate, is a thermosetting insulating sheet made by impregnating and hot-pressing high-purity phenolic resin as an adhesive with wood pulp paper, cotton linter paper, or similar reinforcing materials. Since its invention in 1907, it has become an indispensable basic material in the industrial field due to its excellent comprehensive performance, and is widely used in electronics, machinery, automotive, chemical, and other industries. It is an ideal sheet material that balances practicality, stability, and cost-effectiveness.

I. Core Product Characteristics and Advantages

Bakelite sheets possess outstanding advantages in key properties such as insulation, heat resistance, and mechanical strength, specifically as follows:

(I) Superior Electrical Insulation Performance

Insulation is the core advantage of ,Bakelite Plate. They utilize high-purity phenolic resin combined with a substrate of excellent insulation properties, cured under high temperature and pressure to form a dense insulating structure, effectively isolating current conduction and eliminating the risk of short circuits. Their volume resistivity can reach 10¹²-10¹⁴ Ω·cm, and their dielectric strength ≥15kV/mm. They maintain stable insulation performance under both power frequency and high frequency operating conditions, are non-conductive, and do not generate static electricity, protecting electrical equipment and operators. In humid environments, their insulation performance does not easily degrade, adapting to the electrical insulation needs of various complex operating conditions and fundamentally reducing the risk of electrical faults.

(II) Excellent Heat and Temperature Resistance

As a thermosetting material, bakelite sheet exhibits excellent heat resistance and stability after curing. Unlike ordinary thermoplastics that soften and deform upon heating, its long-term operating temperature remains stable at around 120℃, and it can withstand short-term high temperatures of 150℃ without deformation, aging, or odor. Under repeated hot and cold cycles, it maintains structural integrity without cracking or embrittlement, and can withstand a wide temperature range from -30℃ to 150℃. Furthermore, bakelite sheet is a flame-retardant material; it effectively delays the spread of fire and makes it suitable for high-temperature and flammable industrial environments.

(III) High-Strength Mechanical Properties

Through the tight bonding between the substrate and resin, Bakelite Panels forms a high-strength composite structure, possessing excellent resistance to compression, bending, impact, and abrasion. Its density is 1.3-1.5 g/cm³, hardness can reach 3H or higher, compressive strength ≥120MPa, flexural strength ≥150MPa, and it can withstand large mechanical loads without easily deforming or breaking. The surface of the sheet is smooth and flat, with excellent wear resistance and a low coefficient of friction, making it suitable for manufacturing mechanical transmission parts, clamps, and pads, with a service life far exceeding that of ordinary plastic sheets. In addition, bakelite sheets have excellent dimensional stability, with a warpage ≤3‰. Under conditions of 21-27℃ and 50-60% humidity, it can maintain precise dimensions without shrinkage or expansion, making it suitable for high-precision processing requirements.

(IV) Excellent Chemical Stability

Bakelite sheets possess excellent chemical inertness, exhibiting good resistance to common chemical media such as acids, alkalis, salts, and oils. They do not dissolve, age, or crack, and can be used long-term in weakly acidic and weakly alkaline environments. The sheets are non-absorbent and moisture-free, with a water absorption rate ≤1.5%. Even when exposed to humid environments or water for extended periods, they maintain their mechanical strength and insulation properties, are not prone to mold growth, and are easy to maintain, significantly reducing long-term maintenance costs.

(V) Environmentally Friendly and Recyclable, Excellent Cost-Effectiveness

Bakelite sheets are made from environmentally friendly phenolic resin and natural reinforcing substrates, releasing no toxic or harmful substances and meeting modern industrial environmental standards. Waste bakelite sheets can be recycled through professional recycling processes. Bakelite sheets combine excellent performance with an affordable price and easy processing, significantly reducing production costs and offering excellent cost-effectiveness.

(vi) Easy Processing Characteristics, Adaptable to Diverse Needs

Bakelite sheets have excellent processing performance and can be further processed using conventional mechanical methods such as sawing, cutting, drilling, milling, grinding, and carving. No special processing equipment is required; ordinary machine tools can complete the operation. Furthermore, the boards can be coated and printed, and can be processed into various shapes and sizes of parts according to actual needs, adapting to the personalized requirements of different industries and scenarios. This results in high processing efficiency and low cost.

II. Wide Range of Applications

Thanks to the aforementioned excellent properties, bakelite sheets are used in a wide range of industries, including electronics, machinery, automotive, chemical, construction, and home appliances. Specific applications are as follows:

(I) Electronics and Electrical Industry (Core Application Area)

The electronics and electrical industry is a major application area for bakelite sheets. Their excellent insulation properties and dimensional stability make them a core insulating component for various electrical equipment. Specific applications include: partitions, linings, and terminal blocks for high and low voltage distribution boxes and cabinets; insulating supports and slot wedges for transformers and motors, effectively isolating coils from the core and preventing short circuits; bases and contact supports for relays and circuit breakers; pads and fixture boards for PCB circuit boards, suitable for processing insulating components in ICT and ITE fixtures; sockets, lamp holders, instrument housings, and other civilian electrical components; and anti-static trays and insulating pads for electronic equipment.

(II) Machinery Manufacturing Industry

In the machinery manufacturing industry, bakelite sheets, with their high strength, wear resistance, and ease of processing, are widely used to manufacture various mechanical parts and auxiliary tools. Specific applications include: machining fixtures, jigs, and grinding pads, which can withstand mechanical pressure and friction during machining, ensuring machining accuracy; transmission components such as guide rails, gears, and rollers in machine tools, offering wear resistance, durability, and stable operation; and insulating parts of couplings and mechanical seal gaskets, providing insulation and sealing protection.

(III) Automotive Industry

In the automotive industry, bakelite sheets are mainly used for insulation protection and structural support in automotive electrical systems, adapting to the complex high-temperature and vibration environment inside automobiles. Specific applications include: insulating linings for automotive dashboards and wiring harness mounting brackets.

(IV) Chemical Industry

In the chemical industry, bakelite sheets, with their excellent chemical stability and corrosion resistance, can be used to manufacture auxiliary components for various chemical equipment. Specific applications include: valve liners, which can withstand corrosion from weak acids, weak alkalis, and oils; insulating supports for chemical equipment and operating platform pads, providing both corrosion resistance and insulation protection to ensure operator safety.

(v) Other Industries

In addition to the industries mentioned above, bakelite sheets are also widely used in the construction industry as outer shells and insulating partitions for distribution boxes and switch boxes; in the home appliance industry as insulating components for washing machines, refrigerators, air conditioners, and other appliances; in the daily necessities industry to make tea trays, combs, knife handles, etc., combining practicality and aesthetics; and in addition, they can be used as auxiliary insulating components in rail transit and other applications, adapting to harsh operating environments.

III. Flexible Secondary Processing Methods

(I) Basic Processing Methods

1. Cutting and Cutting: Shearing machines, electric saws, and other equipment are used for cutting. Cutting speed is controlled to prevent overheating and cracking of the sheet metal. The cut edges can be ground after cutting to ensure a smooth surface. Suitable for processing various specifications of sheet metal, gaskets, partitions, and other basic components.

2. Drilling: Ordinary drilling machines, bench drills, and other equipment are used for drilling. Appropriate drill bits are selected, and drilling speed and feed rate are controlled to prevent overheating and damage to the sheet metal. After drilling, debris is cleaned from the holes to ensure accurate hole positions and smooth hole walls. Suitable for screw fixing, wiring, and other applications, widely used in the processing of terminal blocks, brackets, and other components.

3. Milling: Milling machines are used for milling grooves, edges, and irregular shapes. Complex grooves, steps, and irregular contours can be processed to meet the structural requirements of precision components. For example, in the processing of mold clamping plates and jig plates, milling grooves are used to connect and fix parts. During processing, the milling depth and speed are controlled to ensure accuracy and prevent material warping or damage.

(II) Advanced Processing Methods

1. Engraving Processing: CNC engraving machines are used for precision engraving, processing complex patterns, text, and irregular structures to meet personalized customization needs. For example, in the processing of tea trays and handicrafts, engraving creates unique textures and shapes; in the processing of jigs and molds, precise positioning grooves and markings are engraved to improve practicality and aesthetics.

2. Bonding Processing: Special adhesives such as phenolic resin and epoxy resin are used to bond multiple bakelite sheets or bakelite sheet to materials such as metal and plastic to form composite structures, meeting the structural requirements of complex parts. Before bonding, the surface is cleaned to ensure it is free of oil and dirt. After bonding, pressure and curing are applied to ensure a strong bond and prevent delamination.

3. Coating and Printing: Coating and printing are performed on the surface of the Bakelite Plastic Sheet; printing text, markings, and patterns enhances product recognition and aesthetics. Sand and clean the surface before coating to ensure even coverage.

(III) Processing Precautions

1. A small amount of dust will be generated during processing. Operators must wear masks, gloves, and other protective equipment, and maintain good ventilation in the processing environment.

2. Control the equipment speed and feed rate to avoid excessive processing speed or force, which may cause the board to overheat, crack, and produce excessive burrs, affecting processing quality.

3. After drilling, milling, and other processing, clean up debris promptly to avoid residue affecting subsequent processing or product use.

4. Waste bakelite sheets and processing scraps can be recycled through professional recycling processes to achieve resource recycling and reduce production costs.

Preferred Sourcing Channel – AHD OEM/ODM Factory

Choosing a high-quality bakelite sheet supplier is key to ensuring product quality, reducing production costs, and improving production efficiency. AHD Factory, a professional OEM/ODM manufacturer with over 30 years of experience in plastic sheet and rod production, has cultivated deep expertise in this field for many years. With mature production processes, strict quality control, and a comprehensive service system, it has become a trusted supplier in the industry.

The factory has won consistent recognition from customers both domestically and internationally for its stable product quality, reasonable prices, and efficient delivery services. For high-quality bakelite sheets, choose AHD Factory; its professional strength ensures worry-free procurement and reliable use.