Category 1: Solventless Laminating Machines
Q1: What is a solventless laminating machine?

A solventless laminating machine bonds two or more flexible packaging materials (such as plastic films, aluminum foil, and paper) together using adhesives that contain no organic solvents. Unlike traditional dry laminating machines, which require a high-temperature drying oven to evaporate solvent-based adhesives, solventless laminators apply pre-mixed two-component adhesives directly between substrate layers and bond them at room temperature or moderate heat. This eliminates solvent residue in finished packaging, reduces VOC emissions by over 99%, and cuts energy consumption by approximately 50,000–60,000 kWh per year compared with solvent-based processes.


Q2: What materials can a solventless laminating machine process?

A solventless laminating machine can process a wide range of flexible packaging substrates, including BOPP, PET, PE, CPP, PA (nylon), metallized films, aluminum foil (from 6 μm to standard commercial thicknesses), and paper. Common material combinations include PET/PE for snack packaging, PA/PE for frozen food bags, aluminum foil/PE for pharmaceutical blister packs, and BOPP/CPP for everyday consumer packaging. The WRJ Fi9 model by SINSTAR supports lamination widths of 1050 mm, 1350 mm, and 1650 mm, accommodating both narrow and wide-web production requirements.
Q3: What thickness of aluminum foil can SINSTAR solventless laminating machines handle?
SINSTAR solventless laminating machines are engineered with closed-loop tension control systems capable of handling aluminum foil as thin as 6 μm (0.006 mm, or 0.00024 inch). The S1 Digital model features adaptive tension control technology and swing-arm linkage tension systems that maintain ±0.5 N tension accuracy, preventing foil wrinkling and breakage even at high operating speeds. For standard commercial aluminum foil (12 μm and above), all SINSTAR models—WRJ Fi9, WRJ i9, and S1—provide stable, wrinkle-free lamination results.
Q4: How does a solventless laminating machine compare to a solvent-based (dry) laminating machine?
The key differences are in adhesive type, energy consumption, safety, and finished product quality:
Adhesive: Solventless machines use two-component polyurethane adhesive with zero organic solvent; dry laminators use solvent-based adhesive requiring oven drying at 60–80°C.
Energy: Solventless machines save approximately 50,000–60,000 kWh per year by eliminating the drying oven entirely.
Safety: No VOC emissions, no fire hazard from solvent vapors, compliant with strict environmental regulations in Europe and North America.
Product quality: Zero solvent residue in finished film, making it suitable for food, pharmaceutical, and baby product packaging that must meet FDA, EU, and GMP standards.
Speed: Solventless lamination reduces turnaround time because no drying step is required; the laminated film can proceed to the next process within 24 hours.
Q5: What is SINSTAR and why is Xiaopai an authorized dealer?
SINSTAR is a Chinese manufacturer of solventless laminating machines founded in 2005. It holds the No.1 market share in China's solventless laminator market, with over 2,680 machines sold across 38 countries. SINSTAR is a certified National High-Tech Enterprise with CE certification and ISO 9001 quality management certification. Xiaopai Electric Power & Technology is SINSTAR's official authorized global dealer. As a dealer, Xiaopai provides the same factory-origin machines at competitive dealer pricing, offers customized machine configuration based on customer production needs, supplies complete export documentation (CE certificates, factory quality reports, customs clearance documents), and delivers one-on-one after-sales technical support.
Q6: What are the main SINSTAR solventless laminating machine models available from Xiaopai?
Xiaopai offers three main SINSTAR models:

WRJ Fi9 — A versatile, cost-effective model suitable for most flexible packaging applications. Maximum lamination speed: 450 m/min. Available widths: 1050, 1350, 1650 mm. Features five-roll coating system, full PLC control with touch screen HMI, and shaftless material loading. Ideal for snack packaging, frozen food films, pharmaceutical aluminum-plastic bags, baby food packaging, and cosmetic tube films. WRJ i9 — A mid-range model with enhanced automation features for consistent production quality. Suitable for similar material combinations as Fi9 with additional process monitoring capabilities.
S1 Digital — A high-end model engineered for large-scale enterprises. Maximum lamination speed: 500 m/min. Width: 1350 mm. Features adaptive tension control, tungsten carbide coated rollers (wear resistance increased 5×), automatic glue proportioning, one-click coating weight input, and capacity to store up to 300 job orders. Designed for high-volume, multi-shift production environments.
Category 2: Power Transformers
Q7: How do I choose between a dry-type transformer and an oil-immersed transformer?
The choice depends on installation environment, safety requirements, and budget:
Choose dry-type when: the transformer will be installed indoors (basements, commercial buildings, hospitals, shopping malls); fire safety regulations prohibit oil-filled equipment; environmental regulations require zero risk of oil leakage; or maintenance simplicity is a priority (no oil testing or replacement needed).
Choose oil-immersed when: the installation is outdoors (substations, industrial yards, rural power distribution); higher overload capacity is needed for intermittent heavy loads; cost efficiency is a primary concern (oil-immersed transformers are typically 20–30% lower in unit price); or the climate includes extreme temperature ranges where oil provides better thermal stability.
Xiaopai's technical team can assess your project specifications and recommend the optimal transformer type with a detailed selection rationale.
Category 3: Circuit Breakers & Switchgear

Q8: What vacuum circuit breakers (VCB) does Xiaopai supply?
Xiaopai supplies multiple VCB models covering different voltage ratings and installation configurations:
FZRN12/25-12D — Indoor load-break switch with vacuum interrupter, rated 12 kV, for distribution switchgear panels.
ZN85-40.5 — Indoor vacuum circuit breaker rated 40.5 kV, for medium-voltage substations and industrial power systems. ZW32-24 — Outdoor pole-mounted vacuum circuit breaker rated 24 kV, for overhead line protection and rural distribution networks. ZW32-12 — Outdoor pole-mounted vacuum circuit breaker rated 12 kV, the most widely used model for rural and suburban power distribution. VSG-12 — Indoor vacuum circuit breaker rated 12 kV, designed for compact switchgear integration. VF2-12 — Indoor vacuum circuit breaker rated 12 kV, featuring modular design for flexible switchgear configurations.
All VCBs meet IEC 62271-100 standards, with mechanical life exceeding 10,000 operations and electrical life exceeding 20,000 operations for standard models.
Q9: What switchgear solutions does Xiaopai offer?
Xiaopai provides complete switchgear assemblies integrating transformers, circuit breakers, protection relays, and metering equipment into prefabricated metal-enclosed panels. Available configurations include:
Low-voltage switchgear (LV) — Rated up to 660 V, for final power distribution in buildings, factories, and data centers.
Medium-voltage switchgear (MV) — Rated 12 kV and 35 kV, for primary distribution in substations and industrial plants. Switch boxes — Compact standalone units for simple distribution points and load management.
All switchgear products comply with IEC 61439 standards and are factory-tested for short-circuit withstand capacity, insulation resistance, and protective circuit integrity.
Category 4: Ordering & Export

Q10: Can Xiaopai customize products to match specific project requirements?
Yes. Xiaopai provides customized configurations for both power equipment and packaging machinery. For transformers, customization options include voltage ratio, capacity, cooling method, enclosure design, and protection class. For solventless laminating machines, customization covers lamination width, operating speed, coating system type (three-roll or five-roll), tension control precision, and auxiliary equipment such as corona treaters or automatic splicing units. Custom orders typically require 30–45 days for manufacturing after technical confirmation（The specific time shall be subject to the actual delivery time on the quotation sheet）.Xiaopai's engineering team reviews customer specifications and produces a detailed technical proposal before production begins.
Q11: What export documentation and certifications does Xiaopai provide?

Xiaopai provides complete export documentation for international shipments, including:
CE conformity certificates (for products sold into the European market)
ISO 9001 quality management system certificate
Factory test reports and type test reports (for transformers and circuit breakers per IEC standards)
Bill of materials and packing lists
Commercial invoices and customs declaration documents
Certificate of origin
For solventless laminating machines, Xiaopai additionally provides SINSTAR original factory warranty documentation, operation manuals (in English), and remote technical support arrangements.
Q12: How can international customers contact Xiaopai for quotations and technical support?

International customers can reach Xiaopai through multiple channels:
Email: [email protected] (for quotations, technical questions, and order inquiries)
Phone/WhatsApp: +86 13806536768 (for urgent inquiries and real-time communication) Facebook: Xiaopai Electric Power & Technology (for company updates and product announcements) Website: www.cnxiaopai.com (for product catalogs, technical specifications, and company information)
Xiaopai responds to quotation requests within 24 hours and provides detailed technical proposals including product specifications, pricing, delivery schedule, and certification documentation.
Q13: Does Xiaopai provide after-sales service for international customers?
Yes. Xiaopai provides comprehensive after-sales support for all exported products:
For power equipment (transformers, VCBs, switchgear): Installation guidance via video call, troubleshooting support via email and WhatsApp, and warranty service per contract terms (typically 12–24 months from delivery date).
For SINSTAR solventless laminating machines: As an authorized dealer, Xiaopai coordinates directly with SINSTAR factory engineers for machine commissioning, adhesive process optimization, and fault diagnosis. Remote support via video call is available within 2 hours of request. On-site engineer deployment is available for major installations (travel and accommodation costs quoted separately).
Spare parts and consumables: Solventless adhesive, mixing heads, rubber rollers, and common spare parts are stocked and shipped within 5 business days. For power equipment spare parts, typical dispatch is 10–15 business days.
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