Quality inspection of EVA first aid kits

Quality inspection of EVA first aid kits

Introduction
In today’s globalized market, first aid kits are an important medical product, and their quality is directly related to the safety and health of users. EVA (ethylene-vinyl acetate) first aid kits are widely popular for their durability, waterproofness and lightness. For international wholesale buyers, it is crucial to ensure that the EVA first aid kits they purchase meet high quality standards.

eva first aid kit

I. Quality inspection standards for EVA first aid kits

(I) Appearance inspection
Appearance is the first impression of the quality of EVA first aid kits. High-quality EVA first aid kits should have the following appearance characteristics:
Surface flatness: The surface of the EVA material has no creases or stains, and the embossing is clear.
Color uniformity: The color is consistent and there is no color difference.
Size accuracy: The size of the first aid kit should meet the design requirements, and the allowable tolerance is ±3.0mm.

(II) Material quality inspection
EVA material is the core component of the first aid kit, and its quality directly affects the performance of the product:
Thickness uniformity: The thickness is measured using a thickness gauge with an accuracy of 0.01mm, and the thickness meets the agreed requirements with a tolerance of ±0.03mm.
Transmittance: For transparent EVA materials, the transmittance should meet the standards.
Cross-linking degree: The cross-linking degree is an important indicator to measure the curing degree of EVA materials. The calculation formula is:
C=[1−
(W2−W1)
(W3−W4)
​
]×100
Wherein, C is the cross-linking degree (%), W1 is the weight of the empty bag (g), W2 is the weight of the bag containing the sample (g), W3 is the weight of the sample package (g), and W4 is the weight of the sample package after solvent extraction and drying (g).
(III) Functional inspection
The functionality of EVA first aid kits is the key to their quality:
Waterproof performance: First aid kits should have good waterproof performance, and the waterproof level should not be lower than IPX4.
Durability: Accessories such as zippers and buckles should be strong and durable and able to withstand repeated opening and closing.
Antibacterial performance: Some EVA first aid kits use antibacterial materials, such as the Sanitized® brand, to ensure that the product remains clean during use.
(IV) Safety inspection
Safety is the most important quality indicator of first aid kits:
Non-toxic and harmless: EVA materials should comply with relevant safety standards and be non-toxic and harmless.
Easy to clean and disinfect: First aid kits should be easy to clean and disinfect to meet medical purposes.

II. Quality inspection process of EVA first aid kits
(I) Incoming material inspection
Incoming material inspection is the first line of defense for quality control:
Appearance inspection: Check the appearance of the EVA material to ensure that there are no defects.
Dimension measurement: Use a steel ruler with an accuracy of 1mm to measure the dimensions to ensure that it meets the requirements.
Thickness measurement: Use a thickness gauge with an accuracy of 0.01mm to measure the thickness to ensure uniform thickness.
(II) Production process inspection
During the production process, strict quality control of semi-finished products is required:
Cross-linking degree inspection: Measure the cross-linking degree by solvent extraction and drying.
Peel strength inspection: Test the bonding strength between EVA material and glass.
Aging resistance inspection: Test the resistance of EVA material to UV aging, heat aging and low temperature environment aging.
(III) Finished product inspection
Finished product inspection is the last checkpoint to ensure product quality:
Appearance inspection: Check the appearance of the finished product to ensure that there are no defects.
Functional testing: Test the various functions of the first aid kit, such as waterproof performance, durability, etc.
Packaging inspection: Check whether the packaging meets the requirements to ensure that the product is not damaged during transportation.

III. International certification of EVA first aid kits
For international wholesale buyers, it is very important to understand the international certification of EVA first aid kits:
ISO 9001: This is a quality management system standard established by the International Organization for Standardization (ISO), which proves that the company has a complete quality management system.
CE certification: This is the basic requirement of the EU market for product safety and quality. Products with CE certification can be freely circulated in the EU market.
FDA certification: This is the certification of medical devices by the US Food and Drug Administration (FDA). Products with FDA certification have a high degree of recognition in the US market.

IV. Case analysis of quality control of EVA first aid kits
(I) Case 1: EVA first aid kits of a well-known brand
The brand strictly follows quality control standards during the production process:
Raw material selection: Use high-quality EVA materials to ensure the durability and waterproofness of the product.
Production process control: During the production process, each link is strictly inspected for quality.
Finished product inspection: The finished product is strictly tested for function and safety.
Through strict quality control, the brand’s EVA first aid kit has gained a good reputation in the market.