Alexei Volkov
Plastic items such as TV remotes, game controllers, and other electronics with hard outer cases, often have a soft plastic coating that can deteriorate and become sticky over time. This is due to the plasticizers in the plastic formula seeping or degrading, causing the rubber to get sticky again. This can also happen when plastic accumulates residue from hands, spills, or leftover adhesive from stickers or glue. While it may be possible to clean the plastic item using household ingredients like baking soda, isopropyl alcohol, water, and mild dish detergent, it is important to note that certain types of plastics may be more susceptible to becoming sticky over time.
| Characteristics | Values |
|---|---|
| Reason for stickiness | Plasticizers 'seep' or degrade over time |
| Storage conditions that increase stickiness | Extreme temperatures |
| Cleaning methods | Baking soda and water, isopropyl alcohol, soap and water, paper towels and alcohol, Murphy's oil soap, clear hand cleaner, ammonia, Mr. Clean Magic Eraser, Goo Gone, ethanol, paint thinner, liquid dish detergent and water |
| Items that commonly become sticky | Remotes, hard plastic toys, stereo controllers, pinball machines, PC joysticks, gaming mice, ThinkPads, audio mixers, consoles, keyboards |
| Potential issues with cleaning methods | Some solvents may damage plastic further, alcohol can remove colour, baking soda may scratch plastic |
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What You'll Learn
Plastic soft-touch coatings
In the automotive industry, soft-touch coatings are used to create a luxurious and leather-like texture on interior plastic surfaces, improving the aesthetics and haptic characteristics of car cabins. This gives car interiors a premium look and feel, differentiating them from competitors.
For consumer electronics, soft-touch coatings provide a unique haptic effect, making gadgets more appealing to consumers. They also offer fingerprint resistance, which is particularly useful for devices that are frequently handled, such as remote controls and game controllers.
In cosmetics packaging, soft-touch coatings engage the sensory perceptions of consumers, encouraging them to touch and interact with the products. Similarly, in the furniture industry, these coatings provide a pleasant-to-touch, matte finish that enhances the overall tactile experience of the furniture.
Some plastic products may develop stickiness over time due to the degradation of plasticizers. This issue can be addressed by cleaning the surface with a suitable method, such as using paper towels and 99% alcohol to remove the sticky coating, or applying a thin layer of RepelFlex ST, an innovative soft-touch coating designed for flexible or rigid plastics, which provides a silky feel and stain resistance.
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Plastic stored in extreme temperatures
To prevent this, it is recommended to store plastic items in cool, dry places. Keeping plastics away from heat sources and direct sunlight can slow down their chemical breakdown. For example, storing plastic kitchen utensils in a cool, dry place when not in use can help maintain their condition.
Additionally, regular cleaning can help remove dust and oils that contribute to surface degradation. Ensuring that plastic items are thoroughly dried after cleaning can also prevent moisture-related stickiness.
In cases where plastic items have already become sticky due to extreme temperatures, there are a few remedies to consider. One option is to clean the plastic item with warm, soapy water, as soap can help loosen migrated plasticizers and restore a non-sticky finish. If soap does not work, baking soda paste or isopropyl alcohol can be used to remove the sticky residue. However, it is important to test these solutions on a small, inconspicuous area first, as some solvents may further break down the plastic.
Overall, minimizing exposure to extreme temperatures is crucial for preventing plastic items from becoming sticky and maintaining their durability.
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Plastic accumulating residue
Plastic can accumulate residue from various sources, such as natural oils and dirt from hands, spills, or leftover adhesive from stickers or glue. This build-up of residue on plastic surfaces can result in a sticky texture over time.
One common source of sticky plastic is the deterioration of soft-touch coatings, which are often applied to plastic products to enhance their tactile appeal and conceal surface flaws. These coatings can break down over time, causing the plastic to become tacky and sticky. This is a common issue with older electronics, such as remote controls, game controllers, and audio equipment.
Additionally, certain types of plastics are inherently more prone to becoming sticky due to the plasticizers they contain. Plasticizers are additives that provide softness and flexibility to plastics. However, they can migrate to the surface and seep out over time, resulting in a sticky or greasy feel. This is often observed in soft or comfort plastics.
To address sticky plastic caused by residue accumulation, several cleaning methods can be employed:
- Baking soda and water paste: Mix equal parts baking soda and water to form a paste. Apply the paste to the sticky areas and scrub gently with a damp cloth. This method effectively removes residue and restores the plastic's original texture.
- Isopropyl alcohol (rubbing alcohol): Soak a cotton pad or cloth in isopropyl alcohol and gently rub the sticky plastic surface. This method may require multiple applications but effectively removes stickiness without damaging the plastic. However, it is important to test on a small area first, as alcohol can affect certain types of coloured plastics.
- Mild soap and water: For less severe cases of stickiness, warm soapy water can be effective. The soap helps to loosen migrated plasticizers and restore a non-sticky finish.
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Rubber reversion
The process of rubber reversion is when rubber breaks down and reverts to its original sticky state. This occurs when the stronger polymer crosslinks are severed, and the molecules revert to their original small chains. Rubber reversion is caused by environmental factors such as extreme temperatures and UV exposure.
Rubber products can become sticky due to rubber reversion. This can be observed in old rubber bands, which either crosslink and stiffen or undergo chain scission and become gooey. Manufacturers often add stabilizers to their products to prevent rubber reversion and extend the product's useful life. However, some manufacturers may choose not to include stabilizers due to the additional engineering and monetary costs.
When rubber products start to stick, it can be challenging to remove the old rubber and apply new rubber effectively. In some cases, the original mould is required to replace the rubber. Temporary solutions, such as covering the sticky surface with electrician's tape, can be used to seal the soft rubber underneath. However, this method is not suitable for surfaces with complex curvatures or items that are frequently rubbed against.
To clean sticky rubber, various methods can be employed. One approach is to use paper towels and 99% alcohol to rub and remove the rubberized coating. While this method can be effective, it requires significant effort, and the rubberized coating may be challenging to remove. Another method involves using baking soda and water to form a paste, which is then applied to the sticky surface and removed with a damp cloth. This approach is gentler on the surface and is suitable for electronics, but it is important to ensure that the battery compartment is wiped and dried thoroughly.
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Solvents for cleaning sticky plastic
When plastic becomes sticky, it is often due to a process called plasticizer migration. Plasticizers are chemicals added to plastics to make them more flexible, and over time, these plasticizers can migrate to the surface of the plastic, making it tacky and sticky. This often happens with older plastics, and it can be a challenge to clean and restore these items. A range of solvents can be used to clean and remove sticky plastic residue, with varying levels of success and suitability, depending on the type of plastic and the severity of the stickiness.
Isopropyl alcohol (IPA) is a common and effective solvent for cleaning sticky plastic. It is a mild solvent that can be used on most plastics without causing damage. IPA is cheap, readily available, and evaporates quickly, making it a convenient choice. It can be applied with a soft cloth, and gentle rubbing will help lift the sticky residue. For more stubborn residue, a stronger concentration of IPA can be used, but it is important to test a small area first to ensure it does not damage the plastic.
Mild detergent and water can also be effective for cleaning sticky plastic. This method is especially suitable for items that may be sensitive to solvents, such as older, brittle plastics. A mild detergent will help to break down the sticky residue, and warm water will aid in softening it, making it easier to remove. Soak the item in warm, soapy water, and then use a soft cloth or brush to gently lift the residue. This method may require more time and elbow grease, but it is gentle and suitable for most plastics.
In more severe cases of plasticizer migration, where the plastic has become extremely sticky and soft, a stronger solvent may be required. Acetone is a powerful solvent that can effectively remove sticky residue, but it must be used with caution as it can also dissolve some plastics. It is important to test a small, inconspicuous area first and to avoid breathing in the fumes. Acetone evaporates very quickly, so it should be used in a well-ventilated area, and care should be taken to avoid contact with skin and eyes. A soft cloth soaked in acetone can be used to wipe down the sticky plastic, and the quick evaporation will leave a clean surface.
Another option is to use a specialized plastic cleaner and restorer product. These products are designed to deep clean and rejuvenate plastics, and they can be effective on sticky surfaces. They often contain a blend of solvents and cleaning agents, and some products may also leave behind a protective coating to prevent future stickiness. These products are designed to be safe for use on plastics and can be a good option for those wanting an 'all-in-one' solution, but they may be more expensive than general solvents.
With any solvent cleaning, it is important to work in a well-ventilated area and to wear protective gloves and eyewear if using stronger chemicals. Testing on a small area first is always recommended to ensure the solvent is compatible with the plastic and will not cause further damage or discolouration.
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Frequently asked questions
Old plastic turns sticky due to the breakdown of the soft-touch plastic coatings used by manufacturers to give their products a rubbery feel. This breakdown can be caused by time, heat, or the accumulation of residue from hands, spills, or adhesives.
There are several methods to fix sticky plastic, including:
- Using a mixture of baking soda and water to form a paste, scrubbing the surface, and then wiping it away.
- Applying isopropyl alcohol or rubbing alcohol to the surface with a cloth or cotton pad.
- Cleaning the surface with warm, soapy water.
When cleaning sticky plastic, it is recommended to avoid using "rubbing alcohol" as it often includes fragrances or other chemicals that may leave a smell. It is also important to avoid using solvents on certain plastics, as they can break down the material further and make it more sticky. Additionally, be cautious when using alcohol on colored plastics, as it may remove the color.
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