China Foam Rubber Manufacturer & Suppliers

Leading-Edge Elastomeric Thermal Insulation Systems for Global HVAC, Cryogenic, and Industrial Infrastructure Projects

Engineered Elastomeric Solutions

HVAC & PIPING

Wholesale Elastic Rubber Foam Insulation Pipe Manufacturers, Supplier

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CLOSED CELL

Wholesale Closed Cell Rubber Foam Insulation Tube Manufacturers, Factories

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CRYOGENIC

Wholesale Elastomeric Cryogenic Insulation Series Manufacturer, Factories

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LOW TEMP

Wholesale Flexible cryogenic insulation Suppliers, Quotes

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NITRILE ACOUSTIC

Wholesale Open Cell Engineered Elastomeric nitrile rubber insulation Factories, Quotes

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ADHESIVE SHEET

Wholesale Flexible Adhesive Thermal Insulation Rubber Foam Sheets Factory, Pricelist

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COLOR CODED

China Colorful NBRPVC foaming insulation tube Manufacturer, Pricelist

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KINGFLEX SPECIAL

China Kingflex insulation tube adopts high-performance Factories, Quotes

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Four Decades of Thermal Engineering Excellence

Kingflex Insulation Co., Ltd. represents a powerhouse integration of advanced manufacturing and global trade. Strategically located within the internationally recognized capital of green-building materials in Dacheng, China, we have committed ourselves to engineering energy-saving, environmentally responsible systems that redefine the standards of modern civil and industrial design.

Rooted in the legacy of the Jinwei Group—established in 1979 as the pioneer thermal insulation manufacturer north of the Yangtze River—Kingflex harnesses more than 40 years of continuous technological evolution. We do not simply supply material; we deliver consultative research, bespoke material engineering, and comprehensive post-sale configuration guidance to lead the global building envelope and piping protection sectors.

600,000+

Annual Capacity (m³)

Automated Assembly Lines

66+

Export Destinations

40+ Yrs

Industrial Heritage

The Science Behind Closed-Cell Nitrile Rubber Foam

Modern high-performance elastomeric insulation relies on a delicate balance of physical chemistry. By blending Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC), Kingflex produces an advanced closed-cell structure. The resulting matrix boasts a closed-cell rate exceeding 98%, which restricts moisture ingress and holds air stationary within its micro-cells.

Why the 98% Closed-Cell Rate Matters

Thermal Conductivity Stability: Stationary gas molecules within the micro-cells yield a ultra-low thermal conductivity ($\lambda \le 0.034 \text{ W/(m}\cdot\text{K)}$ at $0^\circ\text{C}$), preventing heat loss or gain.
Moisture Vapor Transmission Resistance: An inherent water vapor diffusion resistance factor ($\mu \ge 10,000$) eliminates the need for separate vapor barriers, avoiding moisture condensation that breeds mold and accelerates pipe corrosion.
Mechanical Resilience: The rubber-to-polymer ratio guarantees a compression recovery rate above 80%, maintaining shape and insulating properties under localized mechanical loads.

R&D Micro-Testing Facility

Our in-house R&D department features eight specialized engineers focusing on molecular cross-linking, fire-retardant chemistry, and cryogenic thermal behavior.

Standard Dimensions & Technical Parameters

1. Kingflex Black Rubber Foam Insulation Sheet Roll

Material	Thickness Range	Density Range	Service Temperature	Closed-Cell Rate	Resilience
NBR / PVC Blend	6mm - 50mm	40 - 55 kg/m³	-40℃ to 105℃	> 98%	> 80% Compression Recovery

2. Kingflex Black Rubber Foam Insulation Pipe

Material	Thickness Range	Inside Diameter (ID)	Density Range	Service Temperature	Special Application
NBR / PVC Blend	9mm - 40mm	6mm - 114mm	40 - 55 kg/m³	-40℃ to 105℃	HVAC Chilled Water & Steam Piping

China Supply Chain Integration & Production Capacity

Kingflex leverages the ultimate scale economies of China's primary green building materials cluster. With 5 massive automated continuous extrusion lines, our annual output exceeds 600,000 cubic meters. This concentration of raw material sourcing and logistical support enables us to supply projects worldwide without the supply-chain bottlenecks common to smaller operations.

This capacity has earned Kingflex designation as a qualified supplier by the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry of China. Whether managing bulk ocean freight to European seaports or distributing high-volume overland shipments across Central Asia, our logistics team is equipped to optimize delivery times and shipping costs.

Industrial Operations & Certifications

Our plant runs continuous quality control loops traceable to ISO 9001 and ISO 14001 guidelines.

Applications & Infrastructure Projects

HVAC & Commercial Ducting

Preventing condensation and thermal bridging in air handlers, chilled water loops, and air conditioning distribution systems for major high-rise, hospital, and retail developments.

Industrial Piping & Petrochem

Guarding process piping against corrosion under insulation (CUI). Our elastomers withstand demanding chemical environments and steam transport lines.

Cryogenic & Marine Operations

Specially configured flexible cryogenic insulation materials preserve liquid gas lines and process structures operating at extreme sub-zero levels.

Project Gallery & Field Performance

Customer Service & Communication

Our international logistics, engineering, and sales team maintains real-time communications for global customers. See our tracking logs and order support systems below.

Global Compliance, Fire Performance & Traceability

In modern construction, material traceability is a critical risk-management tool. Kingflex maintains complete barcode tracking from chemical loading to final delivery. Our products are engineered and batch-tested to satisfy international standards including:

BS 476 Parts 6 & 7: Achieving Class 0 and Class 1 standards for flame spread and heat release parameters.
UL 94 Vertical Burning Test: Achieving V-0 self-extinguishing ratings for electrical and enclosed compartment applications.
REACH & RoHS: Formulated without toxic flame retardants, polybrominated biphenyls (PBBs), or chlorinated paraffins, making them safe for green-certified buildings (LEED/BREEAM).
ASTM Standards: Rigorously calibrated for thermal conductivity and moisture-vapor transmission parameters.

Factory Floor & Logistics Center

Industrial Insulation FAQ & Expert Knowledge

Q1: What is elastomeric rubber foam insulation used for?

A1: It is primarily used for central HVAC ducts, split and variable refrigerant flow (VRF) air conditioning pipes, building envelope thermal insulation, industrial process cold insulation, and acoustic absorption. Its closed-cell geometry makes it ideal for preventing condensation on cold water piping systems.

Q2: Is Kingflex rubber foam insulation fire resistant?

A2: Yes. Our rubber foam insulation uses advanced flame-retardant additives to meet international standards including BS 476 Class 0, CE, and UL94 V-0 certifications. It is self-extinguishing and does not drop flaming particles when exposed to open flame.

Q3: What is the difference between rubber foam and rock wool insulation?

A3: Rubber foam features a closed-cell elastomeric design that serves as its own vapor barrier, making it perfect for HVAC condensation control and refrigeration. Rock wool is a fibrous material with excellent high-temperature fire protection and acoustic performance, typically used in high-temp industrial pipes and fire wall systems where temperatures exceed 200°C.

Q4: Do you provide customized insulation products?

A4: Yes. We offer comprehensive OEM/ODM configurations including custom sheet thicknesses (6mm up to 50mm), pressure-sensitive adhesive backing, aluminum foil protective cladding, and customized colors to suit complex project requirements.

Q5: What certifications do your products have?

A5: Our materials are verified under BS 476, CE, REACH, RoHS, UL94, and ASTM protocols, ensuring complete structural safety, low toxicity, and precise thermal performance.

Q6: Does Kingflex products have traceability?

A6: Yes. Each production run has a distinct batch tracking number. This allows us to track raw materials, extrusion machine logs, curing temperature records, and QC test findings back to the source.

Q7: What thickness of Rubber foam insulation sheet roll can you produce?

A7: Our standard extrusion lines accommodate sheet rolls ranging from 6mm to 50mm in thickness, giving engineers flexibility when designing multi-layered insulation arrays.

Q8: What is the expected service life of rubber plastic pipes and boards?

A8: Under standard operating environments and with proper installation, Kingflex products maintain structural and thermal performance for 10 to 15 years. Their resistance to moisture prevents premature degradation.