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{"title":"Breakthrough In Deep Processing Technology Of Prepainted Steel Coils","imgUrl":"https:\/\/img.chinax.com\/nimg\/05\/76\/c2731216dce4687b41902eb4aab0-200x200-1\/breakthrough_in_deep_processing_technology_of_prepainted_steel_coils.jpg","attrs":{"Brand Name":"ZHONGQIANG","Model Number":"0.34*914","Certification":"ISO","Place of Origin":"China"}}
{"title":"Galvanized Coated PPGI Steel Coil In Blue Color For Cutting Sheets","imgUrl":"https:\/\/img.chinax.com\/nimg\/a6\/22\/e042d7b8285440c02ae3bd600d64-200x200-1\/galvanized_coated_ppgi_steel_coil_in_blue_color_for_cutting_sheets.jpg","attrs":{"Place of Origin":"China","Brand Name":"Zhong Qiang","Certification":"ISO","Model Number":"CE ISO CNAS CQC"}}
{"title":"Embossed Steel PPGI Coils 0.08 - 8.0mm Thickness AS EN Standard","imgUrl":"https:\/\/img.chinax.com\/nimg\/8c\/4d\/a55026e7d9cc63a8c2c3f3f3a57f-200x200-1\/embossed_steel_ppgi_coils_0_08_8_0mm_thickness_as_en_standard.jpg","attrs":{"Place of Origin":"China","Brand Name":"Zhong Qiang","Certification":"ISO","Model Number":"CE ISO CNAS CQC"}}
{"title":"White Wooden PPGI Steel Coil PVDF Printed Pre Painted Galvanized Steel Coil Cold","imgUrl":"https:\/\/img.chinax.com\/nimg\/e1\/13\/d2205f7a47b9ec529046b1b49ba0-200x200-1\/white_wooden_ppgi_steel_coil_pvdf_printed_pre_painted_galvanized_steel_coil_cold_rolled.jpg","attrs":{"Brand Name":"Zhong Qiang","Certification":"ISO","Place of Origin":"China","Minimum Order Quantity":"1 Ton"}}
{"title":"508mm \/ 610mm ID PPGI Steel Coil With PVDF Coating Type Chromated And Oiled","imgUrl":"https:\/\/img.chinax.com\/nimg\/e1\/2e\/d442a2cf4afa446373cdc7f50a6b-200x200-1\/508mm_2f_610mm_id_ppgi_steel_coil_with_pvdf_coating_type_chromated_and_oiled.jpg","attrs":{"Place of Origin":"China","Brand Name":"Zhong Qiang","Certification":"ISO","Model Number":"CE ISO CNAS CQC"}}
{"title":"Galvanized Sheet Deep Processing Slitting: Gains Wide Use Via High Practicality","imgUrl":"https:\/\/img.chinax.com\/nimg\/72\/04\/5acfa918c0ca9a7de3a62f40ea13-200x200-1\/galvanized_sheet_deep_processing_slitting_3a_gains_wide_use_via_high_practicality.jpg","attrs":{"Brand Name":"ZHONGQIANG","Certification":"ISO","Place of Origin":"china","Minimum Order Quantity":"1 Ton"}}
{"title":"Combining Strength PPGI Steel Coil PVDF Printed Prepainted Steel Coils","imgUrl":"https:\/\/img.chinax.com\/nimg\/5d\/16\/0e0a15fe6a2d906618b79012f3a8-200x200-1\/combining_strength_ppgi_steel_coil_pvdf_printed_prepainted_steel_coils_customizable.jpg","attrs":{"Brand Name":"Zhong Qiang","Certification":"ISO","Place of Origin":"China","Minimum Order Quantity":"1 Ton"}}
In the production process of prepainted steel coils, coating materials are selected based on application requirements such as weather resistance, corrosion resistance, and glossiness. They are mainly categorized into three types: primers, topcoats, and backcoats. Their specific types and characteristics are as follows:
1. Primers: Enhance adhesion between substrate and topcoat, and strengthen anti-corrosion foundation
Primers act directly on pretreated metal substrates (such as cold-rolled steel plates and galvanized steel plates). Their core functions are anti-corrosion and improving interlayer adhesion. Common types include:
Epoxy Primer:It has extremely strong adhesion, good compatibility with galvanized steel plates and cold-rolled steel plates, and excellent chemical corrosion resistance. It can effectively block the contact between the substrate and external moisture and salt, making it the mainstream primer in the home appliance and building materials fields.
Polyester Primer: It has high compatibility with polyester topcoats and good coating flexibility. Suitable for deep processing scenarios that require subsequent bending and stamping, it balances anti-corrosion and processing performance.
2. Topcoats: Determine product appearance and core weather/durability performance
As the "surface barrier" of prepainted steel coils, topcoats directly affect the appearance (color, glossiness) and service durability, and should be selected according to the application environment. Mainstream types are:
General Polyester Topcoat: It has high cost-effectiveness and optional glossiness (high gloss, flat gloss). With moderate weather resistance, it is suitable for non-outdoor scenarios such as indoor home appliances (refrigerator side panels, washing machine casings) and indoor decorative parts.
Silicon-Modified Polyester (SMP) Topcoat: Silicon resin is introduced into polyester, significantly improving weather resistance (no easy fading or chalking after 5-8 years of outdoor exposure). It also has good solvent resistance and is often used in outdoor light steel structures (workshop cornices, exterior walls of temporary buildings).
Polyvinylidene Fluoride (PVDF) Topcoat: It has top-tier weather resistance (15-20 years of outdoor service life), excellent UV resistance, acid rain resistance, and high-low temperature resistance (-40℃~150℃). With strong color stability, it is mostly used in high-end outdoor scenarios, such as large building curtain walls and exterior walls of airport terminals.
Acrylic Topcoat: It has high glossiness and bright colors. Its weather resistance is better than that of general polyester but weaker than SMP. It is suitable for lightweight indoor and outdoor applications with high appearance requirements (such as advertising signs and decorative panels).
3. Backcoats: Strengthen protection for the back of coils and avoid damage during processing/storage
Although backcoats are not directly exposed to the outside, they need to protect the back of coils from scratches and corrosion while improving overall structural stability. Common types are:
Epoxy Backcoat: It has strong corrosion resistance and good adhesion to substrates, suitable for humid environments (such as cold storage and basement ceilings).
Polyester Backcoat: It has good flexibility, no easy cracking during coil winding and transportation, and is compatible with most general scenarios. Its cost is lower than that of epoxy backcoats.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter,Seller
Year Established:
2010
Total Annual:
10000000-20000000
Employee Number:
100~300
Ecer Certification：
Verified Supplier
Shandong Zhongqiang Metal Materials Co., Ltd is a leading company in the metal materials industry, specializing in the sales of a wide range of high-quality metal products. With a strong reputation for excellence and innovation, we have been committed to providing reliable and cost-effective so... Shandong Zhongqiang Metal Materials Co., Ltd is a leading company in the metal materials industry, specializing in the sales of a wide range of high-quality metal products. With a strong reputation for excellence and innovation, we have been committed to providing reliable and cost-effective so...
