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Heat Sealed Laminated Non-woven Bags

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Heat Sealed Laminated Non-woven Bags
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Heat sealed laminated non-woven bags, with their high strength and sealing properties, perform outstandingly in protective scenarios. When customizing, suitable materials and parameters should be selected based on the characteristics of the item (moisture resistance, load-bearing, temperature resistance, etc.).
Category
Non Woven Laminated Bag
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Description

Product Details

 

Heat sealed laminated non-woven bag is a multi-layer structure packaging bag formed by bonding non-woven fabric with other materials (such as film, another layer of non-woven fabric) through hot pressing composite technology. The edge of the bag is sealed through heat sealing technology, without the need for needle or glue. It has the advantages of strong sealing, stable structure, waterproof and oil resistant, and is widely used in food packaging, medical supplies, industrial parts storage and other scenarios.


The heat sealing process tightly adheres the edges of the bag body (such as the bottom and sides), effectively blocking air, moisture, and dust, especially suitable for items that require moisture and pollution prevention (such as dry goods and medical equipment).


The multi-layer composite structure enhances tear resistance and load-bearing capacity, making it less prone to tearing or damage compared to ordinary sewn non-woven bags. Different materials can be composite according to needs, such as non-woven fabric+PE film (to enhance waterproofing), non-woven fabric+aluminum foil (to enhance light avoidance), non-woven fabric+breathable film (to retain breathability), etc. If biodegradable non-woven fabric and food grade film are used in the ring, it can meet environmental protection requirements and food contact standards, avoiding the migration of harmful substances that may be caused by adhesive bonding.

product-800-800
product-800-800

 

Product Parameters

 

Weight of non-woven fabric: 50-120g/㎡
50-80g/㎡ is suitable for lightweight items such as snacks and small parts;
90-120g/㎡ is suitable for scenarios with high load-bearing requirements (such as tools, heavy food)
Composite layer number:
2-layer (non-woven fabric+film): The 2-layer structure is lightweight and suitable for basic protection;
3-layer (non-woven fabric+film+non-woven fabric): The 3-layer structure has higher strength and is suitable for complex environments such as outdoor and humid scenes
Heat sealing temperature: 120-180 ℃ (depending on the material)
The heat sealing temperature of PP substrate is relatively low (120-150 ℃);

PET substrate requires higher temperature (150-180 ℃) and equipment parameters need to be matched to avoid material damage
Dimensions (length x width x side width):
15 × 20 × 5cm (small, like candy)
25 × 35 × 10cm (medium, such as snacks/masks)
40 × 50 × 15cm (large, such as clothing/tools)
The side width determines the thickness of the bag body, and the wide side is suitable for bulky items
Sealing grade: ordinary sealing, high air tightness sealing
Ordinary sealing is suitable for daily moisture prevention;
High air tightness sealing (such as widened heat sealing edges, multi-layer heat sealing) is suitable for vacuum packaging or long-term storage

 

FAQ

 

Q: What is the difference between heat sealed laminated non-woven bags and ordinary sewn non-woven bags?

A: The core difference lies in the sealing method: heat sealed bags are bonded to the edges by hot pressing, with strong sealing and no pinholes, suitable for moisture-proof/leak proof scenarios; Sewing bags are sewn with needle and thread, which have good breathability but weak sealing, making them more suitable for scenarios that require breathability or frequent opening and closing (such as shopping bags).

Q: Can it be used for vacuum packaging of food?

A: Some styles are acceptable. If high airtightness heat sealing technology (such as edge widening heat sealing) and food grade composite film (such as PE film) are used, they can be used for vacuum packaging of non liquid foods, but the negative pressure resistance of the bag body needs to be confirmed (to avoid rupture during vacuum pumping).

Q: Is it easy for the heat sealed edge to crack?

A: Under normal circumstances, it is not easy to crack. The heat sealing strength is related to temperature, pressure, and material compatibility. If the heat sealing parameters match (such as moderate temperature and uniform pressure), the edges are firmly bonded and can withstand daily pulling and pulling; But avoid repeatedly tearing the edge of the heat seal, which may cause cracking.

Q: How to choose composite layer materials for customization?

A: Waterproof and oil resistant requirements: choose PE film composite layer;
Light avoidance requirements (such as tea and medicine): choose aluminum foil composite layer;
Breathable requirements (such as fresh fruits and vegetables): Choose a breathable film composite layer;
High temperature resistance requirement: Choose PET film composite layer.

 

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