Polypropylene colored yarn, the color fastness of polypropylene colored yarn to light, the stable performance of polypropylene colored yarn, customized processing of polypropylene colored yarn, Dongguan Donghong New Materials Co., Ltd. 

When using polypropylene colored yarn on outdoor sunshades, how to select the light fastness of the color? 

Polypropylene colored yarn is often used in outdoor sunshades, outdoor furniture, tents and other products due to its light weight, wear resistance and resistance to acids and alkalis. However, in outdoor environments exposed to sunlight and rain, if the color fastness of the colored yarn to light is insufficient, obvious fading may occur after a few months, affecting the appearance and service life of the products. So, how should the color fastness to light of the polypropylene colored yarn used in outdoor sunshades be selected? Below, we will analyze it from two perspectives for you. 

1. How is the grade of lightfastness determined? 

Lightfastness to light is usually rated using the blue scale (such as the ISO 105-B02 standard), ranging from level 1 to level 8. The higher the level, the more resistant to sunlight. 

For ordinary outdoor uses (sunshade canopies, outdoor furniture covers): It is recommended to choose yarn with lightfastness reaching level 6-7 or above. At this level, it can ensure that there is no significant fading after being used for 1-2 years in general outdoor conditions. For products used for outdoor display or temporary shading, level 5-6 can also meet basic requirements. 

High-standard outdoor applications (long-term exposure, tropical regions): If the awning is exposed to intense sunlight for a long time, it is recommended to choose color fabrics of grade 7-8. When purchasing, you can request the supplier to provide a lightfastness test report (such as xenon lamp aging test data) instead of relying solely on verbal descriptions like "resistant to sun exposure" for judgment. 

The difference between dark and light colors: At the same level, dark color series (such as black, navy blue, deep red) are usually more resistant to sun exposure than light color series (such as beige, light gray, pale blue). This is because the dark pigments themselves can absorb more ultraviolet rays, providing protection. If using light colors is necessary, a higher-grade pigment system may be required. 

II. How to verify and select reliable colored yarns? 

In addition to looking at the grade values, the following points can help you assess the color yarn quality of the supplier more comprehensively. 

Inquiring about the pigment system: The light resistance performance of different pigment varieties varies greatly. High-quality outdoor-grade polypropylene color yarn usually uses a pigment system with better light resistance (such as certain brands of organic pigments or high-performance inorganic pigments). You can ask the supplier if they have optimized the formula for outdoor use. 

Request for test report: A reliable supplier can provide a third-party test report on lightfastness or internal xenon lamp aging test data upon request. Dongguan Donghong New Materials Co., Ltd. mainly deals in PP yarn, polypropylene colored yarn, PP colored yarn, and polypropylene FDY filament. The product colors can be customized, and corresponding color fastness grades can be matched according to the customer's outdoor usage requirements. 

Request for sample fabric exposure: If time permits, you can request to make a small sample from the color fabric and conduct a field exposure test in your target usage area. This is the most direct and reliable verification method. 

Summary and Selection Suggestions 

When purchasing polypropylene colored yarn for outdoor awnings, the following steps are recommended for confirmation: 

Clearly define the usage environment and expected lifespan: Is it for ordinary outdoor use or in areas with intense sunlight? Is it expected to be used for 1 year or more than 3 years? This determines the required level of lightfastness. 

The supplier is requested to provide data on light resistance tests: Request for xenon lamp aging tests or blue scale rating reports instead of relying solely on verbal descriptions. 

Considering the color factor: Dark colors generally have better sun resistance than light colors. If light colors must be used, it is necessary to confirm whether the pigment system is suitable for long-term outdoor use. 

Dongguan Donghong New Materials Co., Ltd. specializes in the production and supply of PP yarn, polypropylene colored yarn, PP colored yarn, and polypropylene FDY filament. We can match the corresponding color fastness grade according to the outdoor usage requirements of customers. Please feel free to send samples for testing. 

Official website: http://www.dgfibre.com/ 

Contact person: Mr. Wu 13808838926 

Mr. Xu 13808858186 

Fax: 0769-2208092 

Email: dg@dgfibre.com 

Address: Wen Tang Brick Kiln Area, Dongcheng District, Dongguan City