From medical dressings to automotive wiring harnesses: a dual track layout of a hot melt adhesive company

As witnesses and promoters of the development of the hot melt adhesive industry, we always pay attention to outstanding enterprises that are deeply rooted in the subdivision track and establish themselves with quality and technology. In this issue, we focus on Nanjing Shuangyou Medical Materials Co., Ltd——A family of its own2014Since its establishment, it has been dedicated to "medical care"+A hot melt adhesive expert with a dual product line centered on industry and a continuous breakthrough over the past twelve years.

 

In the current era of accelerated domestic substitution and increasingly segmented application scenarios, a single product line is no longer able to meet the diverse market demands. Nanjing Shuangyou keenly grasps the trend and builds a The dual engine pattern of "medical adhesive as the quality benchmark, industrial adhesive as the scale support" not only holds the safety red line, but also expands the application boundary, providing precise matching bonding solutions for customers in different industries.

01

Intelligent construction foundation

 

Whether in medical or industrial applications, batch consistency is the core pain point of hot melt adhesive.2024In the year, the new standardized modern production base of Shuangyou was fully put into operation. The fully automated production line, combined with a digital management system, achieved full chain standardized control from raw material storage, real-time monitoring of production to finished product inspection.

 

The company has a professional self-developed experimental team, abandoning homogeneous imitation and relying on independent formula technology to develop differentiated products for different medical and industrial scenarios: low odor environmental protection, high and low temperature resistance, high peeling, and long-term adhesion……Each adhesive product undergoes strict physical property testing to ensure stable performance and completely solve the problem of batch differences in the industry.

 

As a national high-tech enterprise and a private technology enterprise in Jiangsu Province, Shuangyou's R&D and quality control capabilities provide a solid guarantee for the high-quality delivery of dual product lines.

 

 

02

Medical adhesive series

Hot melt adhesive for medical consumables must meet the requirementsISO 10993The biocompatibility series requirements include testing items such as cytotoxicity, skin irritation, sensitization, and pyrogen. Double ExcellenceHA-801、HA-912The entire series of medical adhesives have been approvedSGS、CMATesting, possessingVOCOrtho benzene16A complete set of reports, applicable toPEScenarios such as dressing patches, muscle patches, electrode pads, adhesive plaster, elastic bandages, etc.

 

In formula design, medical adhesive needs to balance initial adhesion and gentle peeling. Excessive adhesion can easily damage the stratum corneum when peeled off, while insufficient adhesion can result in inadequate fixation. The dual optimal solution is to achieve a relatively moderate adhesion range by adjusting the ratio of polymer soft segments to hard segments and screening the thickening resin system——It can ensure sufficient initial adhesion and long-lasting fixation on the skin surface, and can be gently peeled off during replacement without leaving any residue. This technology path has been batch validated in multiple medical consumables companies in China.

 

In terms of production process, the medical adhesive production line adopts independent clean control standards, and the entire process from raw material weighing to finished product packaging can be traced. For medical customers, the batch stability of suppliers directly affects their registration certificate maintenance and compliance costs——Shuangyou has a relatively complete quality control record in this area and is able to cooperate with customers to complete supplier audits and provide the necessary documentation support for change filing.

 

03

Industrial adhesive

The market capacity of industrial adhesive is larger than that of medical adhesive, but the competition is also more intense. Shuangyou's industrial adhesive product line covers scenarios such as wire harness tape, decorative paper, floor composite, foam bonding, express bag sealing, shoe material composite, etc. The core value points lie in batch consistency and production line adaptability.

 

In high-speed automated production lines such as automotive wiring harnesses and home appliance assembly, fluctuations in the softening point of hot melt adhesive and deviations in coating temperature can lead to downtime or the production of defective products. Shuangyou relies on a testing system shared with medical adhesives to conduct comprehensive testing of viscosity, softening point, peel strength, and holding viscosity for each batch of industrial adhesives, controlling performance fluctuations within a narrow range. Some weather resistant formulas are available80℃/90%RHAging under conditions72After hours, the peel strength retention rate can still reach85%Above, it can meet the requirements of export packaging and composite scenarios of building materials.

 

In addition, for industrial customers“No residual glue”and“High temperature resistance without curling edges”The common requirement of Shuangyou is to introduce specific antioxidant systems and crosslinking regulators into the formula, which can improve the cohesive strength and anti migration ability of colloids in high temperature and high humidity environments while ensuring a wide coating process window. At present, this series of products has mature application cases in the fields of automotive interior, home appliance assembly, logistics packaging, etc.

 

04

Dual line collaboration: sharing of R&D and quality control resources

Although the application scenarios and standard systems of medical adhesive and industrial adhesive are different, the underlying technical logic is interconnected——Polymer modification, compatibility with thickening resin, and antioxidant properties/Basic research such as anti-aging system design can be reused in both directions. The R&D team of Shuangyou has accumulated relatively complete data models in these two directions, which can achieve rapid formula adjustment. For example, low demands for medical clientsVOCThe developed devolatilization process is also required to be transferable to industrial low odor product lines, reducing cross development cycles.

 

2024The new base, which was put into operation in the year, takes into account the flexible switching ability between medical and industrial production lines in its design: it can support the sampling and verification needs of small and multiple batches of medical adhesive, as well as meet the supply requirements of large-scale and continuous production of industrial adhesive. From the actual operational situation, this flexible configuration has certain practical value in responding to the order fluctuations and customization needs of customers in different industries.