VietSonic designs and manufactures machines based on fabric samples, bonding-line requirements, and actual production processes. Businesses can test ultrasonic bonding on their own materials before finalizing the machine configuration.
Requirements of lingerie manufacturers
Bra fabrics can vary in fibre composition, stretch, number of layers, surface coating, and thickness. These differences directly affect how the material responds to ultrasonic energy. A machine running successfully does not by itself confirm that the bonding line will meet the required strength and shape.
Compatible material layers are bonded at the contact area, reducing exposed thread and the added thickness associated with conventional stitching.
The ultrasonic process does not require a needle to penetrate the material, making it suitable for areas that require a clean surface with minimal needle marks.
Speed, pressure, ultrasonic energy, and the guiding mechanism are calibrated to the sample to maintain a consistent bonding line.
The roller width, profile, and pattern can be designed for the bonding position and the product’s visual requirements.
Bonding principle
The ultrasonic assembly generates high-frequency mechanical vibrations. The material passes through the contact area between the ultrasonic horn and the roller. Vibration combined with pressure generates localized heat within the material’s thermoplastic content, creating a bond without needles or thread.
Bonding quality depends on several factors:
Technical note: Not every lace, mesh, or stretch fabric can be bonded with the same configuration. Material samples should be tested to evaluate bonding strength, deformation, colour changes in the bonded area, and durability after stretching.
Machine development capabilities
The machine configuration is developed from the product the business needs to manufacture. The technical team directly handles the work that affects machine operation and bonding quality.
Determine the material composition, number of layers, stretch, and required bonding position.
Calculate the roller width, surface, and pattern based on the bonding-line sample required by the business.
Synchronize the ultrasonic system, drive mechanism, pressure system, machine table, and material-guiding mechanism.
Directly inspect the bonding line, fabric feed speed, and operating procedure before handover.
Application video
The video shows how the material is fed through the bonding area and how the machine creates the bonding line on an actual product.
Configuration based on requirements
The more clearly a business provides its product samples and operating conditions, the more closely the proposed machine can match the required process.
| Material sample | Fibre composition, thickness, stretch, number of layers, and surface coating, if applicable. |
|---|---|
| Bonding position | Straight or curved lines, edge bonding, edge cutting, or pattern embossing on the product. |
| Bonding-line requirements | Width, shape, tensile strength, softness, and surface visibility. |
| Current process | Operator tasks, processing time per product, and the stages before or after the machine. |
| Expected output | Product quantity, operating hours per shift, and frequency of product changeovers. |
| Integration requirements | Machine-table dimensions, guides, fixtures, and compatibility with existing equipment. |
Implementation process
The business provides a bra sample, fabric sample, images of the required bonding position, and bonding-line requirements.
The material is tested to evaluate its response to ultrasonic energy, bonding strength, and deformation after processing.
Select the appropriate ultrasonic system, roller type, drive mechanism, machine table, and supporting mechanisms.
VietSonic fabricates and assembles the machine, then sets the speed, pressure, and ultrasonic parameters based on the sample-test results.
The machine is trial-run with the actual material, followed by instructions on operation, parameter adjustment, and basic maintenance.
Production value
Selecting the right application
The machine is suitable for positions where the material can be ultrasonically bonded and the bonding line meets the intended-use requirements. A bra may still require a combination of different manufacturing methods.
Frequently asked questions
This cannot be determined from the fabric name alone. Bonding capability depends on thermoplastic content, fabric structure, number of layers, and strength requirements. The actual material should be tested before finalizing the configuration.
Yes. The roller width, pattern, and surface profile can be designed based on the bonding-line sample and product requirements.
The business should provide a fabric sample, finished-product sample, images of the required bonding position, expected output, and a description of the current process.
Integration depends on the available floor space, current operating procedure, and the speed of related processes. After assessing the requirements, VietSonic can propose a suitable machine table, guiding system, or fixture.
Speak directly with our technical team
Provide the fabric type, required bonding position, bonding-line shape, and expected output. The VietSonic team will analyze the requirements and propose a solution suited to the business’s production process.
✓ Fabric sample or bra sample
✓ Images of the required bonding position
✓ Bonding-line dimensions and design
✓ Expected output per shift
✓ Video of the current process, if available
