How to wash off hot melt adhesive on hands or clothes? Two methods: hot wiping and post-treatment after curing

Hot melt adhesive (taking the commonly used EVA system for book binding as an example) is a solid particle at room temperature. It is heated to 160-180 ℃ on the machine before melting into a liquid state and being able to wet and bond. After cooling, it re solidifies into a film. So there are two states of ‘getting on hands/clothes’:Not yet solidified (still hot and sticky) and Already cured (dry hard film formation)——The processing method is completely different. Below, explain the steps and principles of the two situations in one go, and attach the most important safety prerequisite.

1、 First, let’s answer directly: it depends on whether the glue is “hot” or “dry”

• When hot (uncured)Before it dries, quickly wipe off most of it with waste paper/dry cloth, and don’t let it spread out; Use a tissue to repeatedly press and absorb the remaining heat while it is still hot. This step is the most crucial, the earlier it is processed, the easier it will be.
• After drying (solidified)Don’t pick hard (it can easily damage the skin/tear clothes). Utilizing the characteristics of hot melt adhesive, such as thermoplasticity, low-temperature brittleness, and softening by organic solventsFrozen embrittlementorSolvent softeningThere are two ways to handle it.

2、 How to deal with hands that have been touched

1. uncuredImmediately wipe off the glue with a tissue/cloth, then use warm water and soap to rub off any remaining glue on your hands. Note that the adhesive is hot at this time,Prevent scalding firstDo not directly apply large areas of hot glue with your palm.
2. Already solidified into a filmAfter it cools naturally and hardens, soak your hands in warm water to relax your skin, then gently rub it. Most thin adhesive films will curl up and fall off. Residual glue availableEdible oil/baby oilRub and soften, or useAlcohol (Medical Ethanol)The cotton pad is repeatedly wiped and dissolved, and finally washed with soap.
3. Don’t do itDo not use a blade to scrape hard, do not bake close to the fire, and do not tear directly (which may cause dandruff). If the adhesive area is large or has turned red, rinse with cold water to cool down first, and seek medical attention if necessary.

3、 How to deal with clothes that come into contact with it

1. uncuredImmediately use waste paper to cushion and scrape/suck excess hot glue onto the paper, avoiding spreading the glue on the fabric as much as possible; Do not immediately rinse with water (hot water will make the glue stick more firmly to the fibers).
2. Already cured (most common)Put the clothing bag into the freezer compartment of the refrigerator and let it freeze for 1-2 hours. The adhesive layer will become brittle; After removal, gently scrape off large pieces with a blunt blade or spoon back, most of which can fall off directly.
3. Residual thin stains: UseAlcohol/makeup remover oilTap on the back of the stain (test color fastness in an inconspicuous area first), gently rub open, and then machine wash normally. Stubborn stains can be repeatedly frozen scraped solvent wiped.
4. AttentionAcetone based strong solvents can remove glue faster, but may damage the fabric/fade. It is only recommended to try them on small areas of chemical fiber work clothes that do not mind discoloration; Use solvents with caution when using delicate fabrics such as silk and wool.

4、 Why do these methods work (principle)

Hot melt adhesive isthermoplasticMaterial: Heating melts, cooling solidifies, and this change is physical and reversible. So——- Low temperature makes it brittleAfter freezing, the adhesive film loses its toughness and shatters and falls off easily (suitable for clothes and hard surfaces).- Organic solvents are solubleEthanol, edible oil, makeup remover oil, etc. can soften EVA film to help separate (suitable for skin, residual thin stains).By understanding these two points, there is no need to use force or brute force, which is both clean and minimally damaging to the skin and clothing.

5、 More important than ‘how to wash’ is’ don’t scald ‘

The prerequisite for handling adhesive isPrevent burns firstWhen operating hot melt glue in the workshop, the glue pot, hose, and glue outlet are all above 160 ℃. The training specifically includes a “burn protection” checklist (such as the 9 safety items in 2163): wear heat-resistant gloves, do not approach the glue outlet with bare hands, and rinse the skin with cold water before splashing glue. The cleaning method in this article is a remedy after “already touched”, and daily operations still prioritize standardized operation and proper protection.

6、 Relationship with Sunlife’s real business

Sunlife hot melt adhesive is mainly based on EVA system and is widely used in book binding, graphic printing, pearl cotton (EPE) and other scenarios. For customer sites, “how to operate safely and how to handle contact” is part of training and after-sales service: Sunlife provides the “Instructions/Process Card” with the goods upon delivery, which includes key points such as temperature, cleaning cycle, and safety protection; We also provide support such as temperature gun calibration and process training for on-site incidents where 90% of after-sales service is caused by equipment temperature control failure, in order to reduce burns and rework from the source.

Explanation: This article is a general knowledge of handling, and the specific material description of the hot melt adhesive used and the actual fabric/skin condition shall prevail; The composition formula of industrial grade hot melt adhesive and handmade DIY glue stick may be different. Please refer to Sunlife’s accompanying data or MSDS for operation protection.