Personal Heat Relief Product Line Expanded for Export Markets
The cooling vest range now covers high-visibility, special protection and outdoor lifestyle variants, alongside a cooling seat cushion.
Manufacturer of PCM thermal management products
PCM Thermal Management, Engineered for Every Scenario
Phase change material products that absorb, hold and release heat at a defined transition temperature — applied to personal heat relief, building envelopes, cold chain transport and industrial waste heat recovery.
- Manufacturer direct
- OEM & ODM development
- Sample support
- Export documentation
Key focus
Personal Heat Relief
Cooling vests & seat cushions
6
University institutional support
20+
patented technology
3000㎡
Factory area
OEM / ODM
Cooperation model
Solutions
Four application lines built on one core technology
Start from the scenario you need to solve. Each solution page explains the thermal challenge, the PCM approach and the products that fit.
Personal Heat Relief
Cooling Vests Built for High-Heat Work Sites
The current development focus of the company: wearable and seating PCM products for industrial crews, protective environments and everyday outdoor use.
How PCM works
Heat is stored as latent energy, not as temperature change
A phase change material absorbs heat while it melts and releases it while it solidifies. During the transition the material temperature stays close to the transition point, which is what keeps a surface inside a narrow, predictable band.
Step 1
Absorb
As the surrounding temperature rises above the transition point, the material changes from solid to liquid and takes in heat as latent energy.
Step 2
Hold
While the phase change continues, the material temperature stays close to the transition point, which keeps the contact surface inside a narrow band.
Step 3
Release
When placed in a cold environment the material solidifies again and releases the stored heat, returning to its starting condition.
Step 4
Repeat
The cycle can be repeated many times without consumables, which is what makes PCM suitable for daily-use products and long-life installations.
About 330 Technology
A manufacturer focused on thermal management
Haikou 330 Carbon Technology Co., Ltd. develops and manufactures products based on phase change material thermal management. The company works across four solution lines — personal heat relief, building energy efficiency, cold chain logistics, and solar and industrial waste heat recovery — with personal heat relief as the current development focus. Products are supplied to overseas importers, distributors and brand clients, and OEM and ODM development is available for custom specifications.
News
Company updates and industry insight
Published resources
Articles, products, solution content and answers
The blocks below are served from the site database: latest articles, the product catalogue, solution content, delivery case studies and frequently asked questions.
文章
Meeting Overseas Buyers at International Trade Shows
The team presents cooling vest and cushion samples at safety and outdoor industry exhibitions to collect direct buyer feedback.
Why Fixed Melting Point Plates Suit Pharmaceutical Lanes
A comparison of ice-based cooling and phase change plates for temperature-sensitive transport across multi-leg journeys.
Practical Heat Stress Management for Outdoor Work Crews
How site managers combine work scheduling, shade provision and wearable cooling to reduce heat exposure during summer peaks.
产品
High-Visibility Safety Cooling Vest
Reflective cooling vest for road, rail and site crews working in direct sun, with removable sealed PCM panels.
Special Protection Cooling Vest
Cooling layer designed to be worn with protective equipment in demanding industrial environments.
Outdoor Lifestyle Cooling Vest
Lightweight everyday cooling vest for commuting, travel, sport and outdoor recreation.
PCM Cooling Seat Cushion
Contact cooling cushion for vehicle seats, office chairs, wheelchairs and outdoor seating.
Cold Chain PCM Temperature Plate
Reusable cold plate with a fixed melting point for chilled and frozen transport lanes.
Solution content
Personal Heat Relief
Wearable and seating products built on PCM cores that absorb body heat at a controlled temperature band, supporting outdoor labour, industrial sites and daily commuting in hot climates.
Building Energy Efficiency
PCM-based thermal storage components smooth indoor temperature swings, shifting heat absorption to off-peak hours and reducing the load on air conditioning systems.
Cold Chain Logistics
PCM cold storage plates and insulated containers hold a defined temperature band through multi-leg transport, supporting food, pharmaceutical and chemical distribution.
Case studies
Cooling Vest Deployment for Outdoor Work Crews
High-visibility, flame-resistant and outdoor lifestyle cooling vests were supplied to road, rail and construction crews working through high summer temperatures.
Phase Change Panels for Building Envelope Energy Efficiency
Sealed phase change panels were integrated into light partition walls and prefabricated modular units to smooth indoor temperature swings and reduce peak cooling load.
Temperature-Controlled Packaging for Cold Chain Logistics
Phase change cooling plates were designed into insulated shipper boxes for pharmaceutical and food logistics, holding the internal temperature band across the transport window.
常见问题
How does a phase change material cooling vest actually work?
Sealed panels contain a material that changes from solid to liquid at a defined transition temperature. While it changes phase it absorbs heat from the body and holds the contact surface close to that temperature. Once the material has fully melted, the panel is recharged in cold water, a refrigerator or a freezer and can be used again. No batteries or power supply are involved.
Can we request samples before placing a bulk order?
Yes. Samples of standard products are available for evaluation, and pre-production samples can be made for customised specifications. Submit the product name, target specification and delivery address through the enquiry form and the sales team will confirm sample availability, cost and courier arrangements.
What are the minimum order quantity and production lead time?
Minimum order quantity depends on the product, the level of customisation and the packaging format, so it is confirmed together with the quotation. Lead time is calculated from artwork and specification approval, and the schedule is stated in the proforma invoice. For repeat orders with unchanged specifications the lead time is shorter because tooling and artwork are already approved.
Which documents can you provide for our import approval?
Depending on the product we can supply quality management system certificates, textile and material safety test reports, material safety data sheets for the phase change material, thermal performance test reports and product compliance declarations for applicable models. Tell us which documents your import approval requires and we will confirm what is available for the specific item you are ordering.
Get in touch
Tell us the scenario, we will propose the specification
Send your target user, operating environment, expected duration and packaging requirement. Our team replies within one business day with a specification proposal and quotation.
Telephone
400-00-52330Office
Room 1101, Dazu Technology Center, No. 9988 Shennan Avenue, Nanshan District, Shenzhen, Guangdong, China