Views: 229 Author: Weishi Sheets Publish Time: 2026-08-02 Origin: Site
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● How these suppliers were screened
>> 1) Guangdong Weishi New Materials Co., Ltd.
>> 2) Hebei JingHong Electronic Technology Co., Ltd. / J&Q New Composite Materials
>> 3) Yihong Composite Materials
>> 4) Suzhou Wanrun Insulation Material Co., Ltd.
>> 5) Henan Top Industry Technology Co., Ltd.
>> 6) Chongqing Hongfei Electric Co., Ltd.
>> 7) Anshan Anza Electronic Power Co., Ltd.
>> 8) Hangzhou Weshare Import And Export Co., Ltd.
>> 9) Beijing Red Sun Technology Co., Ltd.
>> 10) Beijing Shine Universe Science And Technology Co., Ltd.
● FAQ
>> 1) How can I check whether an ISO certificate is expired?
>> 2) Can I use FR4 instead of G10?
>> 3) What is the safest way to verify a factory in China?
>> 4) Why do two G10 sheets with the same thickness behave differently in machining?
>> 5) How can I avoid hidden quality issues in the first production run?
China remains one of the most important sourcing hubs for G10 epoxy sheet and related glass epoxy laminates because of its dense upstream material supply, mature processing base, and strong export-oriented manufacturing capacity. For buyers who need stable quality, controlled lead times, and custom machining support, Chinese suppliers can be an efficient long-term option if they are screened carefully.
This list was built using practical sourcing criteria that matter to industrial buyers: product consistency, production scale, certification coverage, export experience, OEM/ODM capability, and communication responsiveness. I also prioritized factories that can support repeat orders, sample confirmation, and custom processing rather than only offering catalog sales.
For G10 epoxy sheet, the most useful technical checkpoints are thickness tolerance, flatness, dielectric strength, heat resistance, and whether the sheet is genuinely suitable for the application instead of being loosely marketed as "similar grade" material. Buyers should also verify whether the supplier's certificates are current, match the company name and address, and cover the relevant scope of manufacturing.
China has a strong industrial ecosystem for electronics, electrical insulation, machinery parts, and composite materials, which supports both standard sheets and custom-processed parts. This is especially useful for global buyers who need one supplier for raw sheet, CNC machining, punching, cutting, and package-level delivery. The broader glass epoxy laminate market continues to expand, with one 2026 report valuing the market at USD 2,457.4 million in 2026 and forecasting a CAGR of 5.27% through 2035. Another 2026 market source projects the G10 market to reach about USD 2.46 billion in 2026, with bulk pricing commonly ranging from USD 3.50 to USD 5.20 per kg.
Guangdong Weishi New Materials Co., Ltd. is a practical choice for buyers who value flexible OEM support, responsive communication, and cost control for medium-volume industrial projects. The company was founded in 2007 and operates from Heyuan, Guangdong, with around 20 acres of factory space, three standard workshops, 10 engineers, 60+ technical staff, and a monthly output of 100+ tons.
Its product range covers FR4 fiberglass sheets, epoxy resin boards, antistatic boards, copper-clad laminate, and other insulation materials, which is useful for buyers seeking a broader sourcing partner rather than a single-product vendor. The company states that its sheets meet or exceed international expectations in flatness, thickness tolerance, heat resistance, and electrical resistance, and it supports OEM/ODM service and sample supply. For small and mid-sized brands, its strength is the ability to handle customization with relatively efficient communication and a focus on value rather than only large-scale orders.
Hebei JingHong's export channel is one of the strongest large-scale options in this category, with a reported annual output of 43,000 tons across the old and new factories. The company says it produces G10 material sheet, 3240 epoxy sheet, bakelite sheet, and phenolic cotton sheet, and it positions itself as one of the largest insulation board manufacturers in China.
Its G10 FR4 sheet page lists 30,000 tons per year of productivity, MOQ of 500 kg, standard sizes, and custom size support, which makes it suitable for stable industrial buying programs. It also highlights one-stop service, priority scheduling for direct orders, and its own logistics company, which can help buyers reduce coordination risk. This supplier is a better fit for buyers who want high-volume consistency and a more structured export process.
Yihong Composite Materials appears in recent supplier roundups for fast delivery and broad epoxy sheet coverage, including FR4, G10, and high-frequency laminates. That makes it relevant for buyers who need a multi-grade sourcing option rather than a single standard G10 sheet.
Its main advantage is product breadth, which can help buyers consolidate orders when different insulation grades are needed across one project. Buyers should still request detailed test data, sample approval, and certificate copies before locking in production because broad catalog coverage does not automatically guarantee application-specific suitability.
Suzhou Wanrun is listed in the 2026 price guide as a G10/FR4 supplier with a visible market presence and standard industrial packaging model. It is the type of supplier that tends to serve buyers who already know their specification and want straightforward sheet procurement.
The company is positioned in the mid-market range, with MOQ and packaging options suited to regular purchasing rather than highly experimental development work. Buyers who value repeatability and simple ordering may find this practical, especially when the target is standard industrial insulation sheet rather than niche formats.
Henan Top Industry Technology is another active supplier in the 2026 pricing ecosystem, offering 0.2 mm to 50 mm FR4/G10 sheet with a flexible MOQ structure. This width range matters for buyers who need both thin insulation layers and thicker structural boards.
The company seems better suited to buyers with mixed technical requirements, especially where thickness variety is needed for fixtures, panels, and insulated components. Because online marketplace-style listings can vary in quality, buyers should request batch test sheets and confirm whether the offered grade matches the end-use environment.
Chongqing Hongfei Electric is shown in the 2026 price guide as a verified supplier with a 500 kg MOQ and strong reorder activity. That suggests it has some level of repeat buyer traction, which is often more meaningful than a one-time catalog listing.
Its appeal is likely in serving buyers who want an orderable balance of cost and industrial relevance, especially for G10/FR4 sheet in electrical applications. As with any verified supplier listing, buyers should still confirm certificate validity and request current factory documents before moving into mass production.
Anshan Anza Electronic Power is another supplier surfaced in the 2026 market guide, with G10/FR4 offerings and broad industrial positioning. It appears to fit standard insulation procurement needs where buyers compare price, delivery speed, and sheet consistency across several potential vendors.
This type of supplier can be useful for sourcing teams that need quotations quickly and are comparing several Chinese factories in parallel. Buyers should pay special attention to the scope of certification and whether the supplier can provide application-specific testing for electrical and mechanical performance.
Hangzhou Weshare is listed with strong store reviews and a relatively high MOQ of 1,000 kg, which suggests a more bulk-oriented sales model. That can be attractive for buyers with stable annual demand and a need to lock in supply continuity.
The company appears to work well for structured procurement rather than trial orders or very small custom runs. Buyers should ask for cutting tolerance, packaging method, moisture control, and palletization details, since logistics quality often affects sheet condition on arrival.
Beijing Red Sun Technology is listed as a verified supplier in the 2026 guide with a strong focus on battery pack insulation board and fiberglass epoxy sheet. That specialization is important because battery and electrical applications often demand tighter performance control than general-purpose industrial sheets.
For buyers in energy storage, EV support parts, or electrical assemblies, this kind of specialization can reduce application risk. The key is to confirm whether the offered G10 grade is genuine, whether the test reports match the production batch, and whether the supplier can support repeat production without changing resin or cloth sources.
Beijing Shine Universe Science And Technology is shown with verified listing status and FR4-related product positioning in the 2026 guide. It is another option for buyers whose demand overlaps between G10 and FR4 insulation needs.
This supplier may be relevant when the procurement scope includes flame-retardant insulation sheet and related electrical laminate products. As always, certification date, test scope, and production consistency should be checked before confirming a long-term contract.
| Supplier | Main focus | Capacity / scale | MOQ | Certification / verification |
|---|---|---|---|---|
| Guangdong Weishi New Materials Co., Ltd. | Flexible OEM/ODM, FR4/G10, custom support | 100+ tons/month | Not publicly listed in the source | ISO14001, ISO45001:2018, TÜV Rheinland-verified info |
| Hebei JingHong / J&Q | Large-scale insulation boards | 43,000 tons/year | 500 kg | Factory/export-oriented listing |
| Yihong Composite Materials | Fast delivery, broad grades | Not stated in source | Not stated in source | Supplier roundup mention |
| Suzhou Wanrun | Standard sheet supply | Not stated in source | Not stated in source | Marketplace-style listing |
| Henan Top Industry | Wide thickness range | Not stated in source | Low MOQ options | Marketplace-style listing |
| Chongqing Hongfei Electric | Verified supplier, repeat orders | Not stated in source | 500 kg | Verified listing |
| Anshan Anza Electronic Power | General G10/FR4 supply | Not stated in source | 1 kg | Marketplace-style listing |
| Hangzhou Weshare | Bulk procurement | Not stated in source | 1,000 kg | Review-based listing |
| Beijing Red Sun Technology | Battery-related insulation | Not stated in source | 100 kg | Verified listing |
| Beijing Shine Universe | FR4 and insulation sheet | Not stated in source | 1 kg | Verified listing |
The most common problem in this category is material substitution: a supplier may quote "G10" but deliver a look-alike sheet with weaker dielectric or mechanical performance. Another frequent issue is mixing application grades, where FR4 and G10 are treated as interchangeable even though they are not the same in fire-retardant behavior and end-use suitability.
A less-discussed but very real internal pitfall is batch drift caused by changes in cloth weave, epoxy system, or press cycle while the supplier still ships under the same product name. The safest way to reduce this risk is to lock the exact test standard, resin system, thickness tolerance, and sample retention method before production starts.
Before placing an order, ask the factory for the business license, certificate copies, and recent test reports, then verify that the company name and address are consistent across all documents. Check the certificate expiry date, scope, and issuing body, because expired or mismatched documents are a warning sign.
For samples, do not only inspect appearance; also test thickness, flatness, machining behavior, and electrical performance under your real operating condition. For shipping, confirm packaging, pallet type, moisture protection, and whether the supplier can support consolidated loading or door-to-door handoff for export orders.
If you are sourcing G10 epoxy sheet for a long-term industrial program, China offers a strong mix of scale, custom capability, and export experience. Among the suppliers above, Guangdong Weishi New Materials Co., Ltd. is a solid fit for buyers who want a responsive, customization-friendly partner with practical support for OEM projects and medium-sized orders.
Look for the issue date, expiry date, company name, address, standard number, and scope on the certificate, then confirm that the certifying body is accredited. If the certificate is expired or the scope does not cover the relevant factory and product line, do not treat it as valid for sourcing decisions.
Not always. FR4 is flame-retardant, while G10 is the base glass epoxy laminate grade, so substitution depends on the required electrical and fire performance of the end application.
Check the business license, registration data, export history, certificates, sample consistency, and if possible, arrange an on-site audit or third-party verification. A single document is not enough; the safest process is document review plus sample testing plus production confirmation.
Differences in cloth weave, resin formulation, press parameters, and internal density can change machining behavior even when the label is the same. This is why sample testing on your own tooling is essential before mass order approval.
Use a signed sample-retention procedure, define the exact test standard, confirm the production batch code, and require the supplier to keep a matching retained sample. Also ask the factory to specify what will happen if the production batch differs from the approved sample, because that clause often prevents disputes later.
- [China National Enterprise Credit Information Publicity System] for company registration checks. [svigloballtd]
- [China Customs statistics] for export and trade references. [svigloballtd]
- [CNAS] for accreditation background on certification bodies. [chinacheckup]
- [Guangdong Weishi New Materials Co., Ltd. company introduction]. [gdwsxcl]
