Heat Resistant Epoxy Resin Board FR4

Production Description

---

  FR4 epoxy sheet is manufactured from 7628 e-cloth in a high temperature environment with an easy-to-process epoxy resin. This product meets the performance requirements of NEMA FR-4 or IECEPGC202, and has excellent mechanical strength and electrical properties in high temperature environments. The continuous operating temperature in mechanical applications is 150°C. Flame retardant properties are UL94V0 or higher.

  FR4 epoxy boards are categorized into several temperature resistance classes, ranging from Class A to Class R. Each class corresponds to different maximum allowable temperatures, winding temperature rise limits and performance reference temperatures. For example, the maximum allowable temperature of grade E is 120°C, while grade R can reach 240°C. When selecting FR4 epoxy boards, the appropriate temperature resistance grade should be chosen according to the specific use environment and temperature requirements to ensure that the material can work stably for a long period of time under the expected temperature.

  FR4 epoxy boards may accelerate aging and malfunction when working for a long time in a high temperature environment, so choosing the right temperature resistance grade and good quality FR4 epoxy boards is crucial to ensure the normal operation of the equipment.

  To determine whether the quality of FR4 epoxy board meets the standard, you can use the following test methods:

  UL 94 flammability test: This is a globally recognized standard for grading flame retardant materials, developed by Underwriters Laboratories. The test includes horizontal burning test (HB), vertical burning test (V-0, V-1, V-2), etc. It evaluates the flame retardant performance of the samples by measuring the time of burning, burning length, extinguishing time and other parameters.

  ROHS environmental protection directive and halogen-free test: modern electronic products are increasingly demanding for environmental friendliness, therefore, flame retardant panels also need to meet the ROHS environmental protection directive, i.e., they do not contain hazardous substances, at the same time, halogen-free is also an important indicator to measure the greenness of flame retardant panels, which needs to be verified through professional tests to see if it meets the relevant standards.

  ISO9001 Quality Management System Certification: High quality FR4 epoxy sheet manufacturers usually pass

  ISO9001 quality management system certification to ensure the consistency and reliability of product quality.

  Raw material and process inspection: Strict control on raw material procurement and production process is also an important part to ensure the quality of FR4 epoxy board. Manufacturers will conduct strict screening of raw materials and implement strict quality control measures in the production process.

  Through the above tests and certifications, the quality of FR4 epoxy boards can be effectively assessed whether it meets the standards. When selecting FR4 epoxy boards, priority should be given to those products that have passed the above tests and certifications to ensure their performance and safety in practical applications.

 

Application in PCB Industry

---

Heat Resistant Epoxy Resin Board FR4 is the most common and popular material in PCB industry. The maximum ambient temperature is between 120℃ and 130℃, depending on the PCB thickness. FR4 is widely used because it is good to make all kinds of layers PCB boards from one layer to multilayer PCB. PCB factory can make all kinds of PCB with FR4, which makes quality control much easier, and eventually, it can reduce the cost. Some materials may be cheaper than FR4 but it can only be used to make one-layer boards, and the stability and reliability of the boards made by these materials are not good.

1. Test Jig

2. Fixture PCB Testing Jig

3. Insulation Plate

4. Switch insulation Plate

5. Polish Gear

6. Mould in Cloth and Shoes

7. Insulation Part of Bakelite Sheet

8. Lithium Battery Pack

Technical Data for FR4

---

NO	TEST ITEMS	UNIT	TEST RESULT	TEST METHOD
1	Bending Strength Perpendicular to Laminations	MPa	571	GB/T 1303.4-2009
2	Compressive Strength Perpendicular to Laminations compressive	MPa	548
3	Parallel Layer Impact Strength (Simply Supported Beam, Gap)	KJ/m²	57.3
4	Tensile Strength	MPa	282
5	Vertical Layer Breakdown Voltage (90℃ + 2℃, 25# transformer oil, 20s step by step boost, φ25mm/φ75mm cylinder electrode system)	kV/mm	16.7
6	Parallel Layer Breakdown Voltage (90℃ + 2℃, 25# transformer oil, 20s step by step boost, φ130mm/φ130mm flat plate electrode system)	kV	＞100
7	Relative Permittivity (50HZ)	-	5.40
8	Dielectric Dissipation Factor (50HZ)		7.2*10-3
9	Insulation Resistance after Soaking	Ω	2.2*1013
10	Density	g/cm3	2.01
11	Water Absorption	mg	5.3
12	Barcol Hardness	-	76	GB/T 3854-2005
13	Flammability	Grade	V-0	GB/T 2408-2008
REMARK: 1. NO.2 the sample height is (5.00~5.04) mm; 2. NO.5 the sample thickness is (2.02~2.06) mm; 3. NO.6 the sample size is (100.50~100.52)mm*(25.10~25.15)mm*(5.02~5.06)mm thickness, The electrode spacing is (25.10~25.15)mm; 4. NO.11 the sample size is (49.86~49.90)mm*(49.60~49.63)mm*(2.53~2.65)mm; 5. NO.13 the sample size is (13.04~13.22)mm*(3.04~3.12)mm thickness.

 

 

Factory

---

J&Q Insulation Material Co., Ltd is a foreign trade company controlled by Hebei JingHong Electronic Technology Co., Ltd., which is responsible for the export business of Hebei JingHong Electronic Technology Co., Ltd. The new factory of Hebei JingHong Electronics Co., Ltd. will be officially put into production in October 2022. Mainly produce FR4 sheet, 3240 epoxy sheet, Bakelite sheet, and 3026 phenolic cotton sheet. The total annual output of the new and old two factory reaches 43,000 tons, which will be the largest insulation board factory in China.

One of our greatest advantage is the orders which are directly from us has the priority to produce first. Also, we have our own logistics company, so it can provide safe and fast service to you. What we are trying to do is providing our customers one-stop service from production to delivery.

Our strength

1. The annual production capacity of the factory is 43,000 tons, which is one of the largest insulation board manufacturers in China

2. Fully automated production workshop, product quality is stable

3. We have more than 20 years of experience in producing and selling insulating sheet, Cooperate with a number of domestic and foreign trading companies for many years.

4. Professional foreign trade team can provide perfect services

5. Have our own logistics company, provide one-stop service

 

Certification

---

Exhibition

---

Packaging and Shipping

---

Regular packing, Protect by Pallet

 

FAQ

---

Q: Are you trading company or manufacturer ?

A: We are factory.

 

Q:What about the package of product?
A:1. Wooden pallet with carton. 2. Plastic pallet with carton. 3. Wooden wooden pallet with wooden case. 4. According to customer requirements.

Q:What's the payment?
A: Payment<=1000USD, 100% in advance

Payment>=1000USD 30%TT advance, 70% TT before shipping

Q:If I need sample,what should I do?
A:It's our pleasure to send sample for you.You can send me your delivery address by email or message.We will send you . . . free sample at first time.

Q:Can you give me a discount price?
A:It is depending on the volume. The larger the volume is; the more discount you can enjoy.

Q:Why is your price a bit higher than other Chinese suppliers?
A:To meet the requirement of different customers and areas, our factory manufactures various kinds of quality for each . . . item at a wide range of price. We can offer the products of different quality levels depending on customer’s target price and quality requirement.

Q:How can you guarantee the quality of mass production is same with the sample sent to me before?
A:Our warehouse staff will leave another same sample in our company, with your company name marked on it, which our production will be based on.

Q:How can you deal with quality issues that customer feedback after receiving the goods?
A:1) Customers take photos of unqualified goods and then our sales staff will send them to Engineering Department to . verify.
2) If the issue is confirmed, our sales staff will explain the root cause and take corrective actions in coming orders.
3) Finally, we will negotiate with our customers to make some compensation.