Maya Ellison
Rubber cement is an adhesive made from elastic polymers, typically latex, mixed with a solvent such as acetone, hexane, heptane, or toluene. It is a drying adhesive, meaning that as the solvents evaporate, the rubber solidifies, creating a strong yet flexible bond. This adhesive is commonly used in handicrafts and applications where easy removal is desired. When it comes to using rubber cement on plastic, it is important to consider the type of plastic and the intended purpose. While rubber cement can be used on plastic, the choice between rubber and plastic depends on the specific application, as each material has its own advantages and disadvantages.
| Characteristics | Values |
|---|---|
| How to use rubber cement on plastic | Mark the plastic to be glued, apply rubber cement on one side, apply pressure until dry, then remove |
| Pros of using rubber cement on plastic | Forms a strong yet flexible bond, easy to peel away or rub off without leaving residue or damaging the surface |
| Cons of using rubber cement on plastic | If the solvent attacks the plastic, it will leave a mark |
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What You'll Learn
How to use rubber cement on plastic
Rubber cement is an adhesive made from elastic polymers (typically latex) mixed with a solvent such as acetone, hexane, heptane, or toluene. It is usually considered a temporary fixative for cut-and-paste applications. While it can be used to bond plastic, it is not well-suited for hard surfaces and will only form a temporary bond. For a permanent bond on plastic, contact cement is recommended.
To use rubber cement on plastic, start by marking the plastic surface to be glued. Apply rubber cement to one side of the plastic, then apply pressure until it is dry. You can then remove the pressure, but keep your hands wet with rubber cement. Pressing will release more of the solvent in the glue than rubbing. An alternative method is to glue two pieces of plastic together at an angle before gluing them down flat, which can help prevent bumps on curved surfaces.
It is important to note that rubber cement may not work well on all types of plastic, and the effectiveness may depend on the specific type of plastic and the intended application. If the solvent in the rubber cement attacks the plastic, it may leave a mark even after it has dried and been rubbed off.
Additionally, rubber cement is often used for paper-based projects or household repairs where easy removal of the adhesive is desired. It is favoured in handicrafts and applications where damage-free removal of the adhesive is important. Modern rubber cements are acid-free, making them suitable for archival purposes.
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The flexibility of rubber cement
The ratio of tensile strength to Young's modulus is a critical factor in the flexibility of rubber cement. A higher ratio indicates a more flexible material. In other words, a material with high tensile strength and low Young's modulus will be more flexible. This understanding guides engineers in developing highly flexible cement compositions.
To further enhance the elasticity of rubber cement, fillers such as carbon black, calcium carbonate, or silica can be added. Additionally, incorporating rubber particles, thermoplastics, or polymers can improve both elasticity and expansion properties. These adjustments allow for customisation to meet specific application requirements.
In summary, the flexibility of rubber cement is a result of its composition and the evaporation of solvents. This flexibility enables it to form strong, expandable bonds that can withstand bending and stretching. The customisable nature of rubber cement's flexibility makes it a versatile adhesive suitable for a wide range of applications, from handicrafts to industrial repairs and well integrity maintenance.
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The permanence of rubber cement
Rubber cement is an adhesive made from elastic polymers, typically latex, mixed with a solvent such as acetone, hexane, heptane or toluene. This mixture is fluid enough to be used as an adhesive and is part of the class of drying adhesives. As the solvents quickly evaporate, the rubber solidifies, forming a strong yet flexible bond.
The permanence of the bond depends on the method of application. "Wet mounting" involves applying rubber cement to one surface and joining the two surfaces while the cement is still wet. This method allows for easy adjustment of the joint while the glue is wet, but the final bond is not particularly strong.
On the other hand, "dry mounting" involves applying rubber cement to one or both surfaces and allowing it to dry completely before joining the surfaces together. This results in a very strong bond, but once the surfaces are glued together, they cannot be easily adjusted or separated without damaging one or both of the surfaces.
Over time, rubber cement loses its stickiness due to chemical breakdown. The volatile organic solvents in rubber cement cause chemical reactions as they break down, and one of these breakdown products is sulfuric acid, which can stain or damage the materials it touches. Therefore, rubber cement is not recommended for use with important or fragile items such as original artwork, photographs, or plastic items, as it can cause deterioration over time.
In summary, while rubber cement can form a strong initial bond, it is not a permanent adhesive due to its tendency to lose stickiness over time and the potential for chemical breakdown to damage the bonded materials.
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The safety of rubber cement on plastic
When using rubber cement on plastic, it is important to follow the correct application method. The plastic should be marked first, and then rubber cement should be applied to one side of the plastic. Pressure should be applied until the cement is dry. If any excess cement needs to be removed, it can be rubbed off, although this may leave a mark if the solvent has attacked the plastic. Therefore, it is important to test on a small, inconspicuous area first to ensure that the rubber cement is compatible with the specific type of plastic being used.
One advantage of rubber cement is that it can be easily removed without damaging the surface or leaving any trace of adhesive behind. This makes it ideal for applications where a temporary bond is desired or where excess cement might need to be removed. For example, rubber cement is used in erasable pens and is often used in handicrafts. Modern rubber cements are also acid-free, making them suitable for archival purposes.
However, older formulae of rubber cement with low pH values can cause deterioration of certain materials over time. Additionally, rubber cement may not be suitable for applications requiring a permanent, water-resistant, or heat-resistant bond. In such cases, other adhesives, such as contact cement, may be more appropriate.
Overall, rubber cement can be used safely on plastic if the correct application methods are followed and if it is determined that the specific plastic and adhesive are compatible. Testing on a small area first is recommended to ensure the desired results and to avoid any potential damage to the plastic surface.
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The types of plastic that can be used with rubber cement
Rubber cement is not suitable for creating permanent bonds with hard surfaces such as plastic, wood, and metal. However, it can form a temporary bond with plastic, which can be useful for household repairs.
Plastic cements, on the other hand, are designed to bond with plastics and are ideal for joining two pieces of plastic. They work by dissolving a thin layer of the surface of the plastic to create a deeper and more flexible bond. Some plastic cements are formulated for specific plastics, such as styrene, butyrate, ABS, acrylic, and copolyester.
For projects that require a strong, permanent bond between two pieces of plastic, contact cement is recommended. Contact cement is a solvent-based adhesive that contains acetone, toluene, and hexane. It creates a permanent bond when coated on two mating surfaces and allowed to dry.
When choosing an adhesive for a project involving plastic, it is important to consider the specific type of plastic being used and the desired strength and permanence of the bond. Different adhesives may be required for bonding plastic to other materials, such as metal or wood. Additionally, the flammability and toxicity of the adhesive should be considered, especially for indoor projects or those involving children.
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Frequently asked questions
Rubber cement is an adhesive made from elastic polymers (typically latex) mixed with a solvent such as acetone, hexane, heptane, or toluene.
First, mark the plastic surface to be glued. Next, apply rubber cement to one side of the plastic and press the two pieces together at an angle before gluing them down flat. This will help prevent bumps on curved surfaces.
Rubber cement can be used on plastic, but it is important to ensure that the solvent in the cement does not attack the plastic. If the solvent attacks the plastic, it will leave a mark even after it is dried and rubbed off.
Rubber cement forms a strong yet flexible bond and is easy to remove without damaging the surface or leaving any residue. It is also acid-free, making it ideal for archival purposes.
