Comprehensive Analysis of Adhesives Specialized for PDMS Membrane Bonding

2025/12/25 0

PDMS (Polydimethylsiloxane) membranes feature low surface energy and high chemical inertness, making it difficult for conventional adhesives to form effective bonds. Thus, adhesives with tailor-made formulations are required. The mainstream types and their characteristics are as follows:

Comprehensive Analysis of Adhesives Specialized for PDMS Membrane Bonding

Tear strength of 3-6 KN/m, suitable for structural stress-bearing scenarios;
High transparency (light transmittance of 92% @ 2mm), meeting the requirements of optical modules and transparent devices;
Wide temperature resistance range (-50℃ to 250℃) and excellent chemical corrosion resistance, adaptable to harsh electronic and industrial environments.

II. Core Selection Dimensions and Adaptable Scenarios

1. Key Selection Indicators

Indicator Type	Core Parameter Requirements	Impact Scenarios
Mechanical Properties	Tensile strength ≥ 2 MPa; Tear strength ≥ 4 KN/m	Structural load-bearing, high-pressure sealing (e.g., industrial pipelines)
Optical Properties	Light transmittance ≥ 90% @ 2mm, no yellowing	Optical modules, transparent biochemical consumables
Curing Characteristics	Rapid curing for mass production; Low-temperature curing for precision devices	Mass manufacturing, precision component processing
Environmental Resistance	Temperature resistance from -40℃ to 200℃; Resistance to acids, alkalis and solvents	Electronic packaging, outdoor equipment
Compliance Certification	Medical ISO 10993, Food-grade FDA	Medical dressings, food-contact devices

2. Typical Scenario Adaptation Schemes

Electronics/Optics Field: Prioritize the Chongrui NQ-8340 product, suitable for optical fiber modules and outdoor lighting;
Medical/Biochemical Field: Adopt the Chongrui NQ-8340 product for tissue culture consumables and wearable devices;
Industrial Sealing Field: Utilize the Chongrui NQ-8340 product for pipeline sealing and outdoor building materials;
Precision Device Field: Combine plasma bonding technology with the Chongrui NQ-8340 product for microfluidic chips.

III. Standardized Operation Procedures and Key Control Points

1. General Operation Steps (Taking Two-component Adhesive as an Example)

Surface Pre-treatment

Ultrasonically clean the PDMS membrane and substrate with isopropanol to remove oil stains and dust;
Roughening treatment: Glass substrates can be polished with sandpaper; PDMS membranes can be plasma-activated for 20–60 seconds (a contact angle of < 20° is considered qualified).

Adhesive Preparation

Apply the adhesive evenly and perform vacuum degassing for 10 minutes.

Adhesive Application and Lamination

Apply the adhesive with a scraper or roller, controlling the thickness between 0.1–0.5mm to avoid adhesive overflow;
Wait for curing to complete.

Dongguan Yusheng Technology specializes in PDMS adhesive bonding, as well as PDMS R&D and application. We also offer products cured by UV light and moisture. Welcome to contact us: ZHENGZHEN@NQRUBBER.COM