How To Seal Non-woven Fabric

Sealing nonwovens can flexibly choose a variety of technical means according to the specific application and fabric type. The following are several efficient and commonly used sealing methods and their simplified steps:

Heat sealing method
Prepare materials: nonwoven fabric, heat sealer (such as heat pulse or heat press).

Operation process:

Preheating equipment: adjust the heat sealer to the appropriate temperature according to the material of the nonwoven fabric (such as about 150-170°C for polypropylene).
Align the fabric: accurately align the edges of the nonwoven fabric to be sealed.
Apply heat: Use the heat sealer to press the edges of the fabric for a few seconds to ensure that the heat penetrates fully to achieve sealing.
Cooling and shaping: The edges to be sealed are cooled naturally to ensure a strong bond.
Ultrasonic sealing method
Prepare materials: nonwoven fabric, and ultrasonic sealer.

Operation steps:

Equipment setting: Start the ultrasonic sealer and adjust the frequency and amplitude according to the characteristics of the fabric.
Fabric preparation: Accurately align the edges of the nonwoven fabric to be sealed.
Apply ultrasonic waves: Place the fabric under the ultrasonic horn press it, and use the heat generated by ultrasonic friction to seal it.
Cooling and curing: briefly cool the sealed area to promote stable bonding.
Sewing method
Prepare materials: non-woven fabric, sewing machine, and polyester or nylon thread.

Operation points:

Machine preparation: thread the needle and set the sewing machine to straight or zigzag stitch.
Fabric alignment: make sure the edges of the non-woven fabric are aligned correctly.
Sewing seams: sew along the predetermined line, and pay attention to the need to back-stitch and reinforce the starting and closing of the needle.

Trimming edges: cut off excess fabric and thread ends to keep the seams neat.
Adhesive sealing method
Prepare materials: non-woven fabric, fabric adhesive, or hot glue gun.

Operation guide:

Apply adhesive: apply a thin layer of adhesive or hot glue evenly on the edge of the non-woven fabric.
Bonding fabric: quickly press the edges of the fabric tightly, and pay attention to controlling the temperature of the hot glue to prevent burns.
Waiting for drying: wait for the adhesive or glue to dry completely according to the instructions before use.
Practical tips
Pre-test: Test the sealing effect on a small sample of nonwoven fabric before formal operation to ensure that the method is applicable and does not damage the fabric.
Precise alignment: Ensure that the edges of the fabric are precisely aligned to ensure an even and beautiful seal.
Continuous pressure: Maintain constant pressure during the sealing process to enhance the bond strength.
With any of the above methods, you can effectively seal nonwovens to meet a variety of needs from manual DIY to industrial production.