Glass Handle Material and Craftsmanship

The material for glassware handles should be heat-resistant, compatible with the cup body, strong, and aesthetically pleasing.

 

 

In the production of glassware, the selection of handle materials must consider thermal stability, mechanical strength, welding compatibility, and aesthetics. The following is a detailed classification, characteristics and application scenario analysis of commonly used handle materials:

 

Glass handles: high compatibility of homologous materials

 

1. Borosilicate Glass Cup

Composition characteristics: Contains sodium borate and silicon dioxide, a low thermal expansion coefficient, and high temperature resistance (can withstand -20℃~150℃ temperature difference).

 

Core advantages

-Excellent welding: consistent with the composition of the borosilicate cup body, softens synchronously when heated, has uniform stress after cooling, and is not easy to crack (such as Starbucks cold brew cup handle).

-Chemical inertness: resistant to acid and alkali corrosion, suitable for holding juice, coffee and other beverages, and does not turn yellow after long-term use.

-Transparent texture: integrated with the cup body, can be designed as carved, gradient colours and other shapes (such as hand-blown spiral handles).

 

Disadvantages: Highly brittle, easy to break under severe impact, requires a thickening design (such as handle root diameter ≥ 5mm).

Applicable scenarios: high-end heat-resistant glassware (such as oven baking trays, laboratory beakers), transparent tea sets.

 

 

2. Soda-Lime Glass Cup

Composition characteristics: Contains sodium oxide and calcium oxide, low cost, and high thermal expansion coefficient.

Core advantages:

-Good processability: low softening point (about 600℃), easy to form by flame bending, suitable for mass production (such as ordinary glass handles).

-Rich colours: Metal oxides (such as iron oxide for red and cobalt oxide for blue) can be added to achieve colourful handle designs.

 

Disadvantages: Poor temperature resistance (easy to crack when the temperature difference exceeds 50℃), not suitable for high temperature scenes.

Applicable scenarios: normal temperature water cups, decorative glassware (such as colourful S-shaped handles).

 

 

3. The design and connection of the wooden handle of the glass cup must take into account the material adaptation, process safety and beauty and durability. Common woods such as beech, walnut and oak are preferred because of their hard texture, good water resistance and beautiful texture.

 

Connection Method

Mechanical fixation: Connect to the glass through screws, buckles or metal parts embedded in the wooden handle to ensure stability.

Glue bonding: Use food-grade waterproof glue, which must meet food contact safety standards.

Mixing method: Combine mechanical fixation with glue bonding to double guarantee the connection strength.

 

 

 

 

 

Key points of wood processing:

Strictly control the moisture content to prevent deformation due to moisture. Waterproof treatment of the surface, such as coating wood with wax, oil and varnish, isolates moisture and prevents mould. The design focuses on matching the shape with the style of the glass cup, such as streamlined adaptation to modern style, and retro texture echoing traditional design.

 

Durability maintenance: Regularly apply special wood oil for maintenance. Avoid exposure to the sun and long-term immersion in water to extend the service life of the handle.