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Heating pads (bags) are external patches that generate heat through the oxidation reaction between iron powder and oxygen in the air. They are mainly used for local heat application. Based on the usage method, heating pads can be categorized into adhesive and non-adhesive types; based on the contact with the human body, they can be divided into direct skin contact and non-direct skin contact types. Generally, heating pads are disposable products, convenient to use, and effective.
Heating pads (bags) are generally composed of the following parts:
Outer Bag: Due to the heating principle of heating pads, they need to be sealed off from air during storage. Therefore, a sealed outer packaging bag or vacuum bag is required to ensure the airtightness of the packaging and prevent the evaporation of moisture in the heat bag.
Non-woven Fabric Layer: The heating time and temperature of the heating pad are controlled by the oxygen permeability rate of the breathable membrane. Since the breathable membrane is thin and easily damaged, a layer of non-woven fabric can prevent the breathable membrane from wear and improve comfort during use.
Breathable Layer: The oxygen permeability rate of the breathable membrane directly affects the heating time and temperature of the heating pad. If the oxygen permeability rate is too high, the heat concentrates, potentially causing burns. If the oxygen permeability rate is too low, the temperature is insufficient to achieve a therapeutic effect.
Heating Material Layer: This is the core component of the heating pad, made of iron powder, water, activated carbon, and salt. Heating time and temperature depend not only on the oxygen permeability rate but also on the proportion of raw materials, and the purity and granularity of the iron powder.
Adhesive Layer: This allows the heating pad to be directly attached to the skin or clothing. It is generally composed of a pressure-sensitive adhesive and backing, often using medical tape.
Anti-stick Isolation Layer: Ensures the heating pad maintains its adhesive quality before use and is convenient to use.
Although heating pads are easy to use, the following points should be noted during use:
Avoid Prolonged Use: The usage time for heating pads should generally not exceed 8 hours to prevent skin damage.
Avoid Direct Skin Contact: For individuals with sensitive skin, it is recommended to use heating pads on clothing to avoid direct skin contact and prevent burns.
Pay Attention to Temperature Control: During use, the temperature of the heating pad should be checked regularly to avoid burns caused by excessive heat.
Special Populations to Use with Caution: Diabetic patients, hypertensive patients, and the elderly should use heating pads cautiously and consult a doctor before use.
Heating pads are widely used in daily life and healthcare. Here are some common application scenarios:
Relief of Muscle Soreness: Heating pads can effectively relieve muscle soreness caused by exercise or fatigue, making them particularly suitable for athletes and manual workers.
Relief of Joint Pain: For arthritis patients, heating pads provide continuous warm therapy, alleviating joint pain and stiffness.
Menstrual Care for Women: Heating pads can relieve abdominal pain during menstruation, providing a warm and comfortable feeling.
Winter Warmth: In cold winter months, heating pads can be used as warmth supplies, adhered inside clothing to provide continuous warmth.