HODAF is a heat pack manufacturer with over 20 years of experience in product development, manufacturing and export. Our 15,000+ m² heat pack production facility operates more than 15 automated production and packaging lines, supporting disposable iron powder heat packs, body warmers, hand warmers and customized heating products for brands, wholesalers and distributors. OEM services are available for heating temperature, duration, size, shape, weight and packaging.
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Iron powder heat packs generate warmth through a controlled oxidation reaction. Once the outer package is opened, oxygen enters through the breathable pouch and reacts with the iron powder inside the pack. This exothermic process gradually releases heat without requiring electricity, batteries or external heating.
A typical air-activated heat pack formulation may contain reduced iron powder, activated carbon, salt, water and vermiculite. Each component plays a different role in controlling heat generation and maintaining stable warming performance.
Opening the sealed package allows air to reach the iron powder. The amount of oxygen passing through the breathable material helps influence how quickly the pack warms and how steadily heat is released.
As the iron powder reacts with oxygen, it gradually oxidizes and releases thermal energy. This air-activated heating principle is widely used in self-heating heat packs, including disposable hand warmers, body warmers, foot warmers and other portable warming products.
Heating performance is influenced by factors such as iron powder content, filling weight, airflow, moisture level and pack size. By adjusting these parameters, different temperature ranges and heating durations can be developed for specific applications.
HODAF can develop iron powder heat packs with different sizes, shapes, heating durations and temperature requirements for private label and OEM programs, helping brands create products for outdoor, personal warming and retail applications.
| Product Name | Application Area | Shape | Heating Time | Remark |
| Body Warmer | Body | Rectangle and Custom shapes | 10 Hours | With Adhesive |
| Hand Warmer | Pocket, Hand, Gloves | Rectangle and Custom shapes | 6-8 Hours | Without Adhesive |
| Foot Warmer | Shoes | Insole and Custom shapes | 8 Hours | Without Adhesive |
| Toe Warmer | Feet and body | U and Custom shapes | 6-8 Hours | With Adhesive |
| Waist Warmer | Waist, Body | Triangle and Custom shapes | 6-8 Hours | With Adhesive |
| Knee Warmer | Knee, Body | Butterfly and Custom shapes | 6-8 Hours | With Adhesive |
| Shoulder and Neck Warmer | Shoulder and Neck | Special and Custom shapes | 6-8 Hours | With Adhesive |
| Abdomen Warmer | Abdomen and Body | Special and Custom shapes | 6-8 Hours | With Adhesive |
| Menstrual Relief Warmer | Abdomen and Body | Rectangle, Special and Custom shapes | 6-8 Hours | With Adhesive |
The right heat pack depends on the intended application, heating performance, product format and target sales channel. For OEM and private label projects, buyers should evaluate the following factors before confirming product specifications.
| Requirement | What to Consider | Typical Options |
|---|---|---|
| Product Type | Decide whether your market requires disposable air-activated products or reusable electric warming products. | Self-heating heat packs, electric hand warmers and other heating products |
| Application | Match the heat pack format to where and how the end user will use it. | Hand, foot, body, waist, knee, shoulder, neck or abdomen |
| Heating Duration | Consider how long the product should provide warmth based on the intended use and customer expectations. | Common durations may include 6, 8 or 10 hours, with custom options available |
| Heating Temperature | The target temperature range should be selected according to the product format, application and market requirements. | Temperature specifications can be developed according to OEM project requirements |
| Adhesive Format | Determine whether the heat pack needs to remain positioned on clothing or be used as a loose portable warmer. | Adhesive or non-adhesive formats |
| Size & Shape | Product dimensions influence comfort, heat coverage, filling weight and packaging requirements. | Rectangle, U-shape, insole, butterfly and custom shapes |
| Packaging | Packaging should match the intended sales channel, brand positioning and retail presentation. | Individual pouch, retail box, multi-pack and private label packaging |
| Target Market | Product specifications and packaging should reflect how and where the heat packs will be sold. | Outdoor, pharmacy, wellness, supermarket, e-commerce and promotional markets |
For private label and OEM projects, HODAF can help match heat pack type, size, shape, heating duration, temperature, adhesive format and packaging to your target market. Providing your intended application, sales region and estimated order quantity will help us recommend a more suitable product configuration.
Find answers to common questions about HODAF heat packs, iron powder heating technology, OEM customization, private label options and bulk purchasing.
HODAF manufactures a range of heat pack products for different warming applications, including self-heating heat packs, hand warmers, body warmers, foot warmers, waist warmers and other customized heating products. OEM and private label options are available for brands, wholesalers and distributors.
Iron powder heat packs generate warmth through an air-activated oxidation process. After the sealed package is opened, oxygen passes through the breathable material and reacts with the iron powder inside. The reaction gradually releases heat without electricity or batteries.
Yes. For OEM projects, heating performance can be developed according to the intended application and product specifications. Factors such as iron powder formulation, filling weight, airflow, pack size and material structure can influence the target temperature and heating duration.
Yes. HODAF supports custom heat packs and private label projects with options for product size, shape, heating duration, filling weight, adhesive format, artwork and packaging. Specifications can be developed around your target market and brand requirements.
Adhesive heat packs are designed to remain positioned on suitable clothing or other intended surfaces during use, while non-adhesive heat packs are typically carried or placed according to the product design. The appropriate format depends on the application, product type and target user.
Yes. Samples can be arranged for product evaluation before a bulk order. For customized projects, sample development can also be used to confirm the heat pack size, shape, heating performance, packaging and other specifications before mass production.
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