About Sinzen Insulation Company Limited - Fiberglass Products Supplier in China

China‑based Sinzen Insulation Company Limited lists five active products in its catalogue. The company focuses on fiberglass textile items, specifically Fiberglass roving, Fiberglass twisted roving, Twisted fiberglass yarn with wire, Fiberglass yarn and Fiberglass square rope. Each entry falls under the broader category of fiberglass products, which are commonly classified under HS chapter 68 (HS code 6810 for glass fibre products). The catalogue does not provide HS codes for individual items, but the product family is aligned with standard glass‑fibre export classifications used worldwide.

The supplier’s catalogue is limited to textile‑type fiberglass items, with no additional product families indicated. The listed items are typical inputs for insulation, reinforcement fabrics and composite manufacturing. The five products together represent the full scope of Sinzen’s current offering, allowing buyers to source a complete set of basic fiberglass yarns and ropes from a single Chinese exporter.

Product Range and Specialties of Sinzen Insulation Company Limited

Sinzen’s product range includes plain fiberglass roving, twisted roving, wire‑reinforced twisted yarn, standard fiberglass yarn and a square‑shaped rope made from bundled fibres. In the industry, roving is usually supplied in 500 kg bales with a linear density of 1.5 - 2.5 tex and tensile strength between 2.5 - 3.5 GPa, while twisted yarns often have a twist per meter of 10 - 20 and may include a steel wire core of 0.2 mm diameter for added stiffness. Typical specifications for fiberglass yarns reference ASTM D2583 (Standard Test Method for Tensile Strength of Glass Fibers) and EN 14657 (Glass fibre yarns for reinforcement). Square rope products are frequently manufactured with a 4 mm×4 mm cross‑section and packed in 20‑ft containers for bulk shipment.

Trade and Export Information - Sinzen Insulation Company Limited

China is one of the world’s largest exporters of glass‑fibre textile products, with HS 6810 covering most of the items listed by Sinzen. Major import markets include the United States, Germany, Japan and South Korea, where the fibres are used in construction insulation, automotive composites and wind‑turbine blade reinforcement. Buyers typically require compliance with ISO 9001 quality‑management systems, CE marking for EU markets, and test certificates that meet ASTM or EN standards. Export packaging usually consists of sealed polyethylene bags or cardboard cartons placed on wooden pallets, and shipments are commonly arranged on 20 ft or 40 ft containers under CIF or FOB terms.

Sourcing from Sinzen Insulation Company Limited - Buyer Guidance

When sourcing fiberglass yarns from Sinzen, request a mill test report that includes tensile strength, modulus, fiber diameter and ash content, as these parameters are standard for quality verification. Verify that the product conforms to the applicable ASTM D2583 or EN 14657 specifications and that any wire‑reinforced yarn includes the steel wire grade and corrosion‑resistance data. Confirm the HS classification (likely 6810) and ensure that the supplier can provide a certificate of origin and, if required by the destination, a CE declaration of conformity before finalising the order.

What types of fiberglass products does Sinzen Insulation Company Limited offer?

The catalogue lists five items: Fiberglass roving, Fiberglass twisted roving, Twisted fiberglass yarn with wire, Fiberglass yarn and Fiberglass square rope, all classified under the glass‑fibre textile family.

Which HS code is applicable to the listed products?

The products fall under HS chapter 68, most commonly HS 6810 which covers glass‑fibre products and related yarns.

What industry standards should I check for these fiberglass yarns?

Typical standards include ASTM D2583 for tensile strength of glass fibres and EN 14657 for glass‑fibre yarns used in reinforcement applications.

Are there any certifications I should request from the supplier?

Buyers usually request ISO 9001 quality‑management certification, CE marking for EU shipments, and mill test reports that reference the relevant ASTM or EN standards.

What are the typical packaging and shipment sizes for these products?

Fiberglass yarns and roving are often packed in sealed polyethylene bags or cardboard cartons, stacked on pallets, and loaded into 20 ft or 40 ft containers for ocean freight.

What documentation is needed for customs clearance?

Customs typically require a commercial invoice, packing list, certificate of origin, the applicable HS code declaration and any required test certificates or CE declarations.

What is a realistic lead time for an order of fiberglass square rope?

Lead times for bulk fiberglass rope from Chinese manufacturers usually range from 30 to 45 days, depending on order size and any required pre‑shipment testing.

How can I verify the quality of the twisted fiberglass yarn with wire?

Request a test report that includes tensile strength of the glass fibres, the steel wire diameter, corrosion‑resistance data and compliance with ASTM D2583 or an equivalent EN standard.