Zoned Independent Pocketed Coil
- Hongjiabin
- Henan
- Determined by the order quantity
- 100000 pcs/month
1. Double wire feeding zones are applied in the process with different wire diameters for clearly differentiated support zones.
2, Durability is improved by overall heat treatment, as the product is able to pass 100,000 cycles without any visible deformation.
3, The sewing of the fabrics to each other is achieved by ultrasound welding of the edges, which removes the ability to be torn by wear and aging of the cotton fabrics.
Product Introduction:
One of the biggest issues faced by mattress makers and hotel procurement managers is the variation in height and firmness of springs from different batches. A difference of even ±3mm in spring dimensions can result in a mattress that feels entirely different from the one in the sample, resulting in canceled orders, guest complaints, and wasted production hours. Moreover, without sufficient data on durability, it is a bit difficult to give long-term warranties or be part of hotel chain tenders.
Our Zoned Independent Pocketed Coil ensures a height range variation of ±2mm for each batch through production control using automated optical systems. The spring uses wire diameters 1.6–2.4mm to form three, five, or seven separate comfort levels. Heat-treated spring gets the durability for 100,000 compression cycles at least and the spring will not even have the slightest deformation. In nonwoven materials, the spring is wrapped or encapsulated by the ultrasonic machine so that one can enjoy excellent motion isolation. Packer or roll pack can be done on flat compress pallets to save your shipping space. 15 years guarantee. You can also have an ISO 9001, SGS, and OEKO-TEX certification.
Technical Specifications
| Parameter | Details |
|---|---|
| Spring Type | Zoned independent pocketed coil (movement isolation + targeted support) |
| Wire Material | High-carbon steel (72A / 72B / 82B grade, optional) |
| Wire Diameter | 1.6 – 2.4 mm (customizable per zone; e.g., 1.6mm for shoulder, 1.9mm for lumbar, 2.2mm for hip) |
| Spring Height | 10 – 20 cm (±2 mm tolerance across all batches) |
| Spring Diameter (Core OD) | 4 – 6 cm (Φ40 – 60 mm) |
| Number of Coils | 4 – 7 turns (adjustable for soft/medium/firm feel) |
| Spring Configuration | Cylindrical or barrel-shaped (drum-type available) |
| Zoning Options | 3-zone / 5-zone / 7-zone (dual wire feeding technology) |
| Fabric Material | 100% virgin polypropylene (PP) spunbond nonwoven |
| Fabric Weight | 50 – 90 g/m² (standard 70 g/m²) |
| Fabric Width | 340 – 690 mm (customizable) |
| Sealing Method | Ultrasonic welding (no adhesive aging issues) |
| Arrangement Type | Straight (side-by-side) or staggered (offset) |
| Edge Reinforcement | Thicker border coils (up to 2.4mm) or high-density foam encasement |
| Heat Treatment | In-line furnace (stress-relieved for fatigue resistance) |
| Durability Test | 100,000 compression cycles – no visible deformation (SGS verified) |
| Tolerance Control | Spring height: ±2 mm / Coil count: ±0.5 turn |
| Packaging Method | Flat compressed on pallet, or roll pack (space-saving for sea freight) |
| Compression Ratio (Roll Pack) | Up to 60% volume reduction vs. uncompressed |
| MOQ | 500 units (sample order: 1 – 5 units accepted) |
| Lead Time | 25 – 35 days after deposit |
| Payment Terms | 30% T/T advance, 70% before shipment |
| Warranty | 15 years (material & workmanship defects) |
| Certifications | ISO 9001, SGS (test report available), OEKO-TEX (on request) |
| Applicable Scenes | Hotel mattresses, branded retail mattresses, home mattresses, high-end apartments, sofa cushions, RV beds |
Core Advantages:
- Splitting the mattress is a major reason why zoned mattresses don’t require manual adjustment of firmness as often, since one spring system is chosen to satisfy the requirements of all sections.
The mattress will restrict the spreading of vibrations thanks to its pocketed nature which adds value to couples in particular who want good sound privacy and an undisturbed sleep setting.
After the springs have been heated, they do not change shape, which gives good bounce. Nonwoven fabric pockets which are ultrasonically weld-sealed and fixed reduce the possibility of pocket damage during the time.
The cluster of open springs allows the air to circulate around and thus prevent the collection of moisture especially when added with the top layers. We customize orders after talking with potential clients."
Custom Services:
We can tailor-making zones (3/5/7 zones), wire diameter (1.6–2.4 mm, varying per zone), spring height (10–20cm), coil count (4–7 turns), fabric weight (50–90 g/m²), and packing method (flat pallet or rolled packaging). Large quantity deliveries and delivery time (25–35 days) or shipping conditions would be discussed upon an agreement.
We look forward to seeing your requirements — within 3 our technical team will provide a unique custom spring system.
About Us
Established in 2002, Jilin Hongjia Bin has developed the expertise in mattress spring R&D and manufacturing for more than 20 years. It is a combination of raw material processing and spring production. It is a company of 168 staff and a 58,000 square meter factory facility equipped with more than 20 automated machine types, resulting in more than 95% automation level. Monthly production:
- 30,000 finished mattresses per month
- 300,000+ mattresses supplied annually
IN-HOUSE SPRING MANUFACTURING
- 100,000 mattress spring cores produced monthly
- Continuous Coil, Bonnell and Pocket Spring systems
- Spring cores supplied both for internal mattress production and external OEM customers
- Complete control from spring production to mattress assembly
. Our goods are sold in more than 20 countries including the US, Canada, South Africa, Turkey, Southeast Asia and Middle East where we supply around 200 customers globally.
Our Quality Testing Report
Hongjiabin springs have received SGS certification, Test Report No.: GZIM2512005025PL01 EN (SGS, 100,000 cycles durability test).
Our Certifications:
Our company holds an ISO 9001 certification for quality management and an ISO 14001 certification for environmental management.
We carry our production processes to the controlled level and have obtained CQM China Green Product Certification and China Environmental Label (Ten Rings) certification for our products.
We meet national environmental standards not only for raw materials but also for the finished products.
Our production system has received the SGS certificate, and the spring wire's tensile strength, elastic limits, and other main features have been tested by third-party laboratories in compliance with the GB/T 4357 and other industry standards.
Environmental Management System Certification No. :17723 EU0066-10ROM
China Environmental Labeling Product Certification No. :CEC2024ELP4225104
China Green Product Certification No. :COM236GPP004397
Manufacturing Process:
Step 1: Dual-Wire Feeding & Coiling
Our coiling machines are equipped with a double-wire feeding system and can produce 140–220 springs per minute. Two different wire thicknesses (for instance, 1.6mm wire for the shoulder area and 2.2mm wire for the hip area) are delivered together, enabling zoned support in a single spring unit. The spring height has an allowable variation of ±2 mm.
Step 2: Heat Treatment
Springs are heat-treated by running them through an in-line furnace so that the internal stress is completely relieved. This treatment makes it possible for a spring to withstand up to 100,000 compression cycles without any visible deformation (SGS Test Report No. GZIM2512005025PL01 EN).
Step 3: Ultrasonic Pocketing
Ultrasonic pocketing is one of the steps taken for individual springs by wrapping each one in a 50- 90 g/m² PP nonwoven fabric and sealing it by ultrasonic welding—no glue, no aging issues. Fabric width is adjustable from 300 to 720 mm.
Step 4: Grid Assembly & Bonding
We arrange springs in either straight or staggered patterns and then bond them together with hot-melt adhesive (applied intermittently to reduce material costs while maintaining structural integrity).
Step 5: Real-Time Quality Control
The quality of each batch is assessed based on the following points:
Spring height: allowed deviation ±2mm
Wire diameter: allowed deviation ±0.05mm
Sealing strength: the welding point is inspected automatically
Any defective units are automatically removed from the production line. OEM customizations (design of zones, wire diameter, height, number of coils, weight of fabric, packaging) are welcome.
Order & Shipping Information
Minimum Order Quantity
500 units per specification
Trial order: 20–50 units accepted for first-time cooperation.
Sample order: 1–5 units available within 3 days.
Payment Terms
30% T/T deposit upon order confirmation.
70% balance against copy of Bill of Lading (negotiable for long-term partners).
Letter of Credit (L/C at sight) accepted for qualified buyers.
Packaging Methods
Option 1 – Flat-compressed pallet:
Each spring sheet compressed to 15–20cm height, stacked on export pallet. 40'HQ loading: approx. 1,000–1,200 units.
Option 2 – Roll pack (space-saving for sea freight):
Rolled with protective wrapping. Volume reduced by up to 60% vs uncompressed. 40'HQ loading: up to 2,000 units.
Both methods: anti-rust treatment + corner protection + fumigation-free wooden pallets (ISPM15 compliant).
International Exhibitions:
We have plans to attend the Seoul International Building Materials Expo in South Korea and the Almaty Construction Expo in Kazakhstan in 2024. Our very own zoned pocket coil springs will be showcased at the Seoul Expo where we will also be discussing our customization capabilities and having technical discussions with local mattress manufacturers. In the Almaty Expo, our main focus will be on our bulk supply capabilities and the highlight will be getting in touch with Central Asian project clients. Participation in these two exhibitions will enable us to extend our presence in East Asia and Central Asia markets and also make some valuable connections.
