The difference between glass adhesive and structural adhesive

The difference between glass adhesive and structural adhesive

1. Conceptual differentiation

Structural adhesive has high strength (compressive strength>65MPa, steel steel tensile bonding strength>30MPa, shear strength>18MPa), can withstand large loads, and is resistant to aging, fatigue, and corrosion. It has stable performance within the expected life and is suitable for bonding strong structural components.

Glass adhesive is a commonly used adhesive in households, mainly composed of sodium silicate, acetic acid, and organic silicone. Sodium silicate is easily soluble in water and has viscosity. It is also known as water glass in the south and alkali in the north.

2. Classification and color differentiation

Structural adhesives are divided into high-performance silicone structural adhesives and neutral transparent structural adhesives. The color of structural adhesive is relatively single, mostly black.

Glass adhesive is divided into single and dual components (single component, dual component), acid-base properties (acidic adhesive, neutral adhesive), color (there are many types, commonly transparent glass adhesive, in addition to black, white, antique bronze, silver gray, etc.), weather resistance, and mold resistance.

3. Performance differentiation

Structural adhesive has high strength, peel resistance, impact resistance, and simple construction process. Used for bonding between the same or different materials such as metals, ceramics, plastics, rubber, wood, etc. It can partially replace traditional connection forms such as welding, riveting, and bolt connection. The stress distribution on the joint surface is uniform and has no thermal impact or deformation on the parts.

Glass glue can be divided into neutral glass glue and acidic glass glue according to their performance. In home decoration, glass glue is commonly used in sanitary ware, toilets, and makeup mirrors in the bathroom.

The adhesive strength of neutral glass adhesive is relatively weak compared to acidic glass adhesive, but neutral glass adhesive has an advantage that it will not easily corrode the bonded items. So if there is no need for strong adhesion in home decoration, neutral glass adhesive can be used for bonding.

Acid glass adhesive also has strong adhesion, but it can corrode objects. Therefore, it is not recommended to use acid glass adhesive in areas where neutral glass adhesive can be used normally. In home decoration, acid glass adhesive is generally used in the blind spot on the back of wooden lines.

4. Adhesion and firmness

If it comes to adhesion and firmness, structural adhesive is definitely better because the main use of glass adhesive is good sealing. Although it also has an adhesive effect, the two types of adhesive have basically different uses, and the price of structural adhesive is generally twice that of glass adhesive. Therefore, everyone can choose which type of adhesive to use according to their own needs.

5. Development trends

Structural adhesive 1978 was introduced to China, overcoming countless difficulties and developing building structural adhesive for reinforcement. After nearly 40 years of development and improvement, it has become mature. In the reinforcement of structural adhesives, there are structural adhesives such as steel structural adhesive, planting reinforcement structural adhesive, and carbon fiber cloth structural adhesive.

The technology of glass adhesive in China is already very mature, and the glass adhesive process is mature, with safe and reliable quality. The requirements for glass adhesive in China are becoming increasingly high.

6. Key points for purchasing

The strength index of the colloidal properties of the structural adhesive meets the requirements.

When choosing glass glue, it is important to distinguish between acidic glass glue and neutral glass glue. Glass glue must be resistant to mold.

7. Usage

The usage method of structural adhesive: surface treatment coating curing.

Usage of glass adhesive: coating bonding curing bonding sealing.

8. Identification method

Structural adhesive identification: testing report, strength testing, quality inspection.

Glass glue: Choose a more expensive and stable glass glue.

9. Storage

Structural adhesive should be stored in a cool and dry place for a storage period of 12 months. If the storage period is exceeded, it should be inspected. If the physical properties meet the standard requirements, it can continue to be used.

Glass glue solution needs to be stored in a cool and dry place, below 30 ℃. Acidic glass glue with good quality can be stored for 12 months, while general glass glue is only stored for 6 months. The storage period for neutral glass adhesive is 9 months.

10. Precautions

During the construction of structural adhesive, good ventilation should be maintained, open flames are strictly prohibited, and construction personnel should take basic protective measures. If it sticks to the skin, rinse immediately with water. If it splashes into the eyes, seek medical attention immediately. Rinse with plenty of water before seeking medical attention.

The substrate of the glass adhesive must be cleaned thoroughly; When the glass adhesive solidifies, there is a strong irritating smell, so ventilation is necessary; The common problem with glass glue is mold, so be careful.