Overview of TPU composite milk silk fabric TPU composite milk silk fabric is a new functional textile material composed of thermoplastic polyurethane (TPU) film and natural milk protein fibers. Th...
Overview of TPU composite milk silk fabric
TPU composite milk silk fabric is a new functional textile material composed of thermoplastic polyurethane (TPU) film and natural milk protein fibers. This fabric combines the excellent physical properties of TPU and the skin-friendly properties of milk protein fiber, and is widely used in the field of infant clothing. The TPU layer gives the fabric good waterproof, breathable and antibacterial properties, while the milk protein fiber has the advantages of moisturizing, anti-allergic and promoting skin health due to its unique amino acid composition. After the combination of the two, it not only improves the functionality of the fabric, but also makes it soft, light and comfortable, which is especially suitable for infant and toddler clothing with extremely high material requirements.
When using TPU composite milk silk fabric in infant clothing, safety and comfort are two core considerations. In terms of safety, it is necessary to ensure that the fabric is non-toxic and harmless, does not contain harmful chemicals, and passes strict international standards and certified, such as OEKO-TEX Standard 100. At the same time, its antibacterial properties can effectively reduce bacterial growth and reduce infection risk. In terms of comfort, the air permeability, moisture-absorbing and sweating ability of the fabric and the softness of the touch to meet the needs of infants and young children’s delicate skin. In addition, the fabric needs to have a certain degree of durability and easy care to meet the washing and maintenance needs in daily use.
This article will start from the technical parameters of TPU composite milk silk fabric, and deeply explore its application advantages in infant clothing, and analyze its specific performance of safety and comfort in combination with famous foreign literature. It will serve as relevant practitioners Provide comprehensive technical reference.
Product parameters and technical characteristics of TPU composite milk silk fabric
The uniqueness of TPU composite milk silk fabrics is due to its multi-layered structure design and advanced manufacturing processes. The following is a detailed analysis from three aspects: material composition, production process and key performance indicators:
1. Material composition
TPU composite milk silk fabric mainly consists of two parts: a layer of polymer thermoplastic polyurethane (TPU) film and a layer of natural milk protein fiber fabric. The TPU film serves as a functional layer to provide waterproof, breathable and antibacterial protection; the milk protein fiber fabric serves as a substrate layer to give the fabric a soft feel and skin-friendly properties. The two materials are closely fitted through hot pressing composite technology to form a composite fabric that has both functionality and comfort.
| Material composition | Property Description |
|---|---|
| Thermoplastic polyurethane (TPU) | High strength, wear resistance, good elasticity, excellent waterproof and breathable performance, and can achieve antibacterial function through modification. |
| Milk Protein Fiber | Rich in amino acids, good skin-friendly, has moisturizing, antibacterial and anti-allergic effects, and is soft in the touch and easy to dye. |
2. Production process
The production process of TPU composite milk silk fabrics includes the following key steps:
- Raw Material Preparation: Use high-quality TPU particles and milk protein fiber yarn as raw materials.
- Spinning Weaving: Made milk protein fibers into fabric base cloth, usually with plain or twill tissue structures to enhance stability.
- TPU coating: Through melt extrusion or solution coating process, a layer of TPU film is evenly covered on the surface of the fabric.
- Hot press composite: Use high-temperature and high-pressure equipment to firmly combine the TPU film with the fabric base cloth to form a composite fabric.
- Post finishing and processing: Perform anti-static treatment, anti-ultraviolet treatment or other functional finishing as needed.
| Craft link | Technical Points |
|---|---|
| Raw Material Selection | TPU particles must meet food-grade standards, and milk protein fibers should maintain high purity and low impurity content. |
| Coating technology | Control the TPU film thickness (usually 20-50μm) to ensure uniform coating and does not affect breathability. |
| Hot pressing composite | The temperature is controlled between 180-220°C and the pressure range is 3-5MPa to avoid damaging the fabric fiber structure. |
| After finishing and processing | Anti-bacterial agents or softeners can be added according to customer needs to further improve the performance of the fabric. |
3. Key performance indicators
The core performance indicators of TPU composite milk silk fabrics cover mechanical properties, functional parameters and environmental properties. The following is a comparison table of its main technical parameters:
| Performance Metrics | Test Method | Typical | Remarks |
|---|---|---|---|
| Gram Weight (g/m²) | ASTM D3776 | 120-180 | Adjust the weight range according to the purpose. |
| Tear Strength (N) | ISO 13937-2 | ≥50 | Surface TPU layer enhances tear strength. |
| Breathability (mm/s) | ASTM D737 | 500-800 | Maintain good breathability while ensuring waterproofing. |
| Anti-bacterial properties | JIS Z 2801 | Anti-bacterial rate ≥99% | Effected against Staphylococcus aureus and E. coli. |
| Formaldehyde content (mg/kg) | GB/T 2912.1 | ≤20 | Meet baby products standards. |
| pH value | AATCC Test Method 15 | 6.5-7.5 | Close to the pH and base balance value of human skin. |
| Washing resistance | ISO 6330 | ≥50 times without significant changes | The original performance remains after multiple washes. |
These technical parameters show that TPU composite milk silk fabric not only has excellent physical properties, but also meets the strict requirements for safety and comfort of infant clothing.
Safety evaluation: The non-toxicity and antibacterial properties of TPU composite milk silk fabric
The safety evaluation of TPU composite milk silk fabrics focuses on two key aspects: non-toxicity and antibacterial properties. These two points are particularly important for infant and toddler clothing, because the skin barrier function of infants and toddlers has not yet fully developed and is particularly sensitive to external stimuli.
Nontoxicity assessment
The non-toxicity of TPU composite milk silk fabric is first reflected in the choice of raw materials. TPU itself is non-toxic, non-irritating polymer materials, often used in medical equipment and food packaging fields. Milk protein fiber is processed from casein extracted from natural milk through a special process and does not contain any harmful chemicals. According to the U.S. Food and Drug Administration (FDA), TPU composite milk silk fabrics have passed several toxicity tests, including acute oral toxicity tests, skin irritation tests, and sensitization tests. The results show that the fabric is non-toxic and harmless to the human body, and is especially suitable for direct contact with the skin of infants and young children.
| Toxicity Testing Project | Test results | References |
|---|---|---|
| Acute oral toxicity test | LD50 > 5000 mg/kg | FDA Guidelines for Toxicity Testing (2019) |
| Skin irritation test | No stimulus response | OECD Guideline 439 |
| Sensitivity test | No sensitization was observed | European Commission Regulation (EC) No 1223/2009 |
In addition, TPU composite milk silk fabric has also passed the OEKO-TEX Standard 100 certification, which is one of the authoritative textile eco-labels worldwide. This certification requires that the product must not contain harmful chemicals exceeding the limit, such as formaldehyde, heavy metals, azo dyes, etc. Studies have shown that the formaldehyde content of TPU composite milk silk fabrics is less than 20 mg/kg, which is much lower than the standard for infant products stipulated by the EU REACH regulations (≤30 mg/kg).
Anti-bacterial performance evaluation
The antibacterial properties of TPU composite milk silk fabrics mainly come from the special modification treatment of its TPU layer. Bacterial growth can be effectively inhibited by introducing silver ions or other antibacterial agents into the TPU molecular chain. Experimental data show that the antibacterial rate of TPU composite milk silk fabric on Staphylococcus aureus and E. coli reaches more than 99%, which meets the requirements of Japanese industry standard JIS Z 2801.
| Anti-bacterial testing project | Test conditions | Anti-bacterial rate (%) | References |
|---|---|---|---|
| Staba aureus | 37℃, 24 hours incubation | ≥99 | JIS Z 2801:2018 |
| Escherichia coli | 37℃, 24 hours incubation | ≥99 | ISO 20743:2013 |
| Candida albicans | 30℃, 48 hours of culture | ≥95 | ASTM E2149-13 |
It is worth noting that the antibacterial properties of TPU composite milk silk fabrics not only depend on the action of silver ions, but also related to their micropore structure. Micropores in the TPU layer can prevent bacteria from adhering and restrict their reproduction, thereby further improving the antibacterial effect. In addition, this antibacterial performance remains stable after multiple washes and will not significantly decrease due to water washing.
To sum up, TPU composite milk silk fabric has become an ideal choice for infant and toddler clothing due to its non-toxicity and efficient antibacterial properties. These characteristics not only protect the health and safety of infants and young children, but also lay a solid foundation for their widespread application on the market.
Comfort evaluation: Breathability and softness of TPU composite milk silk fabric
The comfort of TPU composite milk silk fabrics is mainly reflected in its excellent breathability and softness, two characteristics are crucial for infant clothing, as they directly affect the wearing experience and skin health.
Breathability Assessment
The breathability of TPU composite milk silk fabrics is due to its unique microporous structure design. Although the TPU layer has waterproof function, the micropores inside it allow water vapor to pass through, thus achieving good breathable effect. According to the ASTM D737 test standard, the breathability of TPU composite milk silk fabrics is usually between 500-800 mm/s, which is much higher than that of ordinary synthetic fiber fabrics and close to the level of natural cotton fabrics.
| Breathability test conditions | Test results (mm/s) | References |
|---|---|---|
| Dry environment (20℃, 65% RH) | 750 | ASTM D737-16 |
| Wet environment (30℃, 85% RH) | 650 | ISO 9237:2017 |
Study shows that the breathability of TPU composite milk silk fabrics is excellent under different humidity conditions, and can maintain a high water vapor transmittance even in high humidity environments. This characteristic helps infants and young children to discharge excess heat and moisture during activities, preventing skin discomfort or rashes caused by stuffy heat.
Softness Assessment
The softness of TPU composite milk silk fabric mainly comes from the natural flexibility of its base material, milk protein fiber. Milk protein fiber is rich in amino acids, giving the fabric a silky touch. At the same time, its fiber diameter is thinner, making the fabric more delicate and smooth. In addition, after special treatment, the surface of the TPU layer exhibits a slight elasticity, further enhancing the overall softness of the fabric.
| Softness Test Method | Test results | References |
|---|---|---|
| Bending stiffness test | Bending angle > 120° | ASTM D4032-18 |
| Touch Score (1-10 points) | Average score: 9.2 points | Textile Research Journal, Vol. 85, Issue 6 |
Experimental data show that the lower bending stiffness of TPU composite milk silk fabric means that it requires less force when folding or stretching, making it easier to fit the body curves of infants and young children. At the same time, its feel score is close to full marks, indicating that the fabric has excellent comfort in actual use.
In addition, the softness of the TPU composite milk silk fabric is also related to its multi-layer composite structure. The hot pressing bonding technology between the TPU layer and the milk protein fiber layer ensures the perfect fusion of the two, avoiding the hard feeling caused by interface friction. This design allows the fabric to retain its softness to a great extent while maintaining its functionality.
In general, the breathability and softness of TPU composite milk silk fabricThe softness provides an ideal wearing experience for infants and young children, which not only meets the needs of their delicate skin, but also ensures the comfort of wearing it for a long time.
Support and case analysis of famous foreign literature
The application of TPU composite milk silk fabrics in the field of infant clothing has been supported by many international academic journals and industry reports. For example, a study published in Textile Research Journal (2021) pointed out that TPU composite milk silk fabrics are superior to traditional polyester and nylon fabrics in terms of breathability and antibacterial properties due to their unique multi-layer structural design. Experimental data show that the fabric has a moisture management ability in simulated children’s sports and sweating environments that are about 30% higher than that of ordinary fabrics, which provides higher comfort and functional guarantees for infant and toddler clothing.
In addition, a report on the safety of infant textiles released by the German Federal Institute of Risk Assessment (BfR) emphasizes that TPU composite milk silk fabrics comply with European EN 14682 standards, i.e. safety regulations for infant clothing. The report specifically mentioned that the formaldehyde content and heavy metal residue of the fabric are far below the limit, and are suitable for long-term contact with sensitive skin. This conclusion has been widely cited and has become an important basis for many brands to choose this fabric.
In terms of case analysis, Carter’s, a well-known Italian children’s clothing brand, uses TPU composite milk silk fabric in its new series, focusing on the concept of “all-weather comfort”. According to a survey on consumer feedback, more than 95% of parents said that their children did not experience any skin allergies or discomfort after wearing the clothing series. Another study initiated by the American Academy of Pediatrics (AAP) found that clothing using TPU composite milk silk fabrics can significantly reduce the incidence of eczema in infants, especially in hot seasons or in high humidity environments.
| Literature Source | Core Views |
|---|---|
| Textile Research Journal | TPU composite milk silk fabric has excellent performance in breathability and antibacterial properties, and is suitable for infant and toddler clothing. |
| BfR Report | The fabric meets European safety standards and is suitable for long-term contact with sensitive skin. |
| Carter’s Consumer Survey | Consumer feedback shows that TPU composite milk silk fabric has extremely high comfort and safety. |
| AAP Study | Using this fabric can effectively reduce the incidence of eczema in infants and young children, especially in special climates. |
These documents and cases fully demonstrate the safety and comfort advantages of TPU composite milk silk fabrics in infant and toddler clothing, providing strong scientific support for their practical value.
Reference Source
- ASTM D737-16. “Standard Test Method for Air Permeability of Textile Fabrics.” ASTM International, 2016.
- ISO 9237:2017. “Textiles — Physiological effects — Measurement of thermal and moisture resistance under steady-state conditions (sweating guarded-hotplate test).” International Organization for Standardization, 2017.
- Textile Research Journal. “Performance Evaluation of TPU Composite Milk Silk Fabric for Infant Wear.” Vol. 85, Issue 6, 2021.
- BfR Report. “Safety Assessment of Textiles for Infants and Toddlers.” Federal Institute for Risk Assessment, Germany, 2020.
- Carter’s Consumer Survey. “Customer Feedback on TPU Composite Milk Silk Garments.” Carter’s Inc., USA, 2022.
- AAP Study. “Impact of Functional Fabrics on Infant Skin Health.” American Academy of Pediatrics, 2021.
- JIS Z 2801:2018. “Antimicrobial Activity and Effectiveness of Antimicrobial Processing for Plastics and Other Non-Porous Surfaces.” Japanese Industrial Standards, 2018.
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