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English Views: 0 Author: Site Editor Publish Time: 2025-01-06 Origin: Site
Perforated PE film is based on a special polyethylene (PE) plastic film that is perforated with a specific number and size of holes during the production process using special processes or equipment.
• Breathability: The perforated design makes the film have good breathability, allowing air, water vapor, etc. to pass freely, which helps to adjust the air environment around the packaged items and prevent moisture accumulation.
• Moisture resistance: Although there are holes, the PE material itself has a certain moisture resistance, which can block the invasion of external moisture to a certain extent and protect the items from moisture and mildew.
• Flexibility: PE material has good flexibility and tensile strength, so that the perforated film can adapt to items of different shapes and sizes during the packaging process, and is not easy to break or tear, making it easy to use.
• Environmental protection: PE is a recyclable material that meets environmental protection requirements and is environmentally friendly. In addition, some PE perforated films also use degradable PE materials to further reduce the impact on the environment.
• Transparency: Generally, PE perforated films have good transparency, allowing consumers to clearly see the items in the package, making it easier to select and display.
According to different densities, PE perforated films can be divided into high-density polyethylene (HDPE) perforated films, medium-density polyethylene (MDPE) perforated films and low-density polyethylene (LDPE) perforated films. Perforated PE films of different densities have different performance characteristics. High-density polyethylene perforated films have higher strength and hardness and good wear resistance; low-density polyethylene perforated films are softer, more flexible and relatively more transparent.
- Extrusion blow molding: Add polyethylene raw materials to the extruder, heat and melt, and extrude them into tubular blanks through the die head, then introduce compressed air to blow them into film bubbles, and perform punching operations on the film bubbles at the same time. Finally, after cooling, stretching, winding and other processes, PE perforated film is produced.
- Casting method: After the polyethylene raw materials are heated and melted, they are cast by the casting head on the cooling roller, and quickly cooled to form a film, and then punched by the punching equipment to obtain PE perforated film. The film produced by this method has good thickness uniformity and high transparency.
- Calendering method: After the polyethylene raw materials are mixed with additives, they are calendered through the gap between multiple rolls of the calender to make it into a film with a certain thickness and width, and finally punched. The PE perforated film produced by the calendering method has a high surface flatness and is suitable for the production of some packaging materials with high appearance requirements.
Food Packaging: Widely used in the packaging of fruits, vegetables, bread, cakes and other foods, which can not only maintain the freshness and taste of food, but also make food breathable and extend the shelf life.
Agricultural field: It can be used as a soil film to cover the surface of farmland, with the functions of heat conservation, moisture retention, weeding and preventing soil compaction, which is conducive to the growth and development of crops. In addition, it can also be used for storage and transportation packaging of agricultural products, such as net bag packaging of potatoes and onions.
Medical and Health: In the field of medical and health, PE perforated film can be used to make medical dressings, surgical gowns, isolation suits, etc. Its breathability and moisture resistance can provide a comfortable use experience for medical staff and patients, and can also play a certain protective role.
Packaging of daily necessities: PE perforated film is also used in the packaging of daily necessities such as paper towels, sanitary napkins, diapers, etc., which can not only display products, but also have moisture-proof and breathable effects to maintain product quality and hygiene.
Industrial packaging: used for packaging some electronic products, hardware tools, mechanical parts, etc., which can prevent items from being damaged by collisions, scratches, etc. during transportation and storage. At the same time, the breathable performance also helps prevent condensation in the packaging and prevents items from rusting or getting damp.
One of the main advantages of PE perforated film in sanitary napkins is breathability. During menstruation, the skin of a woman's private parts is in contact with the sanitary napkin for a long time. If the air permeability is poor, the local environment will be humid and hot. The small holes on the PE perforated film allow air to flow freely, allowing the skin to "breathe". For example, in the case of prolonged sitting, ordinary non-breathable materials will cause the local temperature to rise and easily breed bacteria. When using sanitary napkins with PE perforated film, the heat can be dissipated through the small holes, reducing the congestion and discomfort and skin problems caused by moisture and congestion.
Although the PE perforated film itself has no absorption function, it can play a certain auxiliary role in leakage prevention as the outer material of the sanitary napkin. It can effectively prevent menstrual blood from leaking from the side without hindering the absorption of menstrual blood by the absorbent layer. Its good flexibility allows the sanitary napkin to conform to the body curve during use, reducing gaps and the risk of side leakage.
The soft texture of PE perforated film can improve the feel of the sanitary napkin. When women walk or exercise, it will not cause friction and irritation to the skin. Compared with some harder materials, it can bring a more comfortable experience to users. Moreover, due to its existence, the air inside and outside the sanitary napkin can be exchanged, which helps to keep the local dryness and make users feel more comfortable.
Perforated PE film usually has a certain degree of transparency, which allows consumers to intuitively see the internal structure of the sanitary napkin, such as the position and size of the absorbent core. From a production perspective, this transparency also makes it convenient for manufacturers to check product quality during the production process to ensure that the internal structure of each sanitary napkin is complete and flawless. At the same time, it can also serve as a barrier to prevent external dust, impurities, etc. from contaminating the absorbent layer inside the sanitary napkin, thus ensuring the sanitary quality of the product.
The air permeability of PE perforated film can be tested by a simple experiment. Hold the sanitary napkin with PE perforated film in your hand and observe the distribution of holes against the light. If the holes are evenly distributed and there are more holes, the air permeability is theoretically better. You can also blow gently with your mouth to feel how easily the air passes through the perforated film. For example, place the PE-perforated side of the sanitary napkin close to your lips and blow gently. If you can clearly feel that the air passes easily, it means that its air permeability is good.
Check the air permeability indicators in the product description. Some high-quality brands of sanitary pads indicate relevant parameters such as air permeability on the product packaging. The higher the air permeability, the better the air permeability of the perforated PE film.
Make sure that the perforated PE film is made of polyethylene material that meets hygienic standards. Check the product ingredients label. High quality PE perforated film should be pure polyethylene material without harmful chemicals such as heavy metals (mercury, lead, etc.) and harmful plasticizers. Because these harmful substances can be released during use and cause harm to human health.
Check to see if the product has passed relevant health and safety certifications, such as medical device certification or strict sanitary product quality certification. These certifications are important guarantees of product quality and safety.
Gently pull the perforated PE film with your hands to feel its flexibility and strength. A good quality perforated PE film should have good elasticity and not break easily when pulled. If it breaks when you pull it, it may be damaged during use, which will affect the performance of the pad.
Observe the recovery of the PE-perforated film after folding or bending. Fold the PE-perforated film part of the sanitary napkin and then unfold it to see if it can quickly return to its original shape without any obvious wrinkles or deformation. If it recovers well, it means that it has good flexibility and can better fit the body curve in actual use.
Carefully observe whether the edge of the hole is smooth. High quality PE perforated film has advanced perforation technology, and there will be no burrs on the edge of the hole. If the hole edges are rough, it may irritate the skin and cause discomfort.
Check that the hole sizes are uniform. Uneven holes may affect the effect of air permeability and liquid penetration. You can use tools such as a magnifying glass to aid observation and ensure that the hole sizes are relatively uniform.
Consider the compatibility of the perforated PE film with the inner absorbent material and the outer packaging material of the sanitary napkin. It should be able to cooperate well with the internal absorbent core without affecting the absorption of fluid by the absorbent core and play the role of outer protection. At the same time, it should closely adhere to the outer packaging material without delaminating or falling off, so as to ensure the overall quality and performance of the sanitary napkin.
Lonsun is a supplier of raw materials for sanitary napkin production. If you need perforated PE film for the topsheet of sanitary napkins, contact us.
