Steels for packaging are thin gauge flat carbon steels, tin or chromium coated on both sides. This particular combination gives the tinplate an interesting set of properties: strength and stiffness, formability, welding ability, lacquer ability and printability, good cosmetic appearance and corrosion resistance. These properties bring appropriate response to all the necessary requirements: content protection during stocking and transportation, safe food preservation, printed information for the final user, ease of use, sustainability and environmental friendliness. Mass production of tinplate for canning human food started in year 1810, when Nicolas Appert wrote a famous book describing the technique of sterilization (also called "appertization") to preserve the food and when Peter Durand patented the same year the use of metal cans for the foodstuffs. Since then, tinplate has constantly taken advantage of dramatic improvements, especially over the past decades: improvements of the steel production processes (lower melting residuals and better inclusion cleanliness, switch from ingots to continuous casting, better temperature controls during hot rolling, high precision cold rolling), improvements of the coating process (hot dip tinning replaced by electro tinning to reduce the thickness of the tin layer), improvements of lacquers to increase the corrosion resistance, switch from soldering to electric welding for the can bodies. Unlike any other packaging material, steel is 100% infinitely recyclable and recycled. Thanks to its magnetic properties, steel packaging is the easiest and most economical type of packaging to sort and recover for recycling. Regardless of how many times it is recycled, steel loses none of its strength or inherent properties. 
 

Production process

Product specifications

Coating

As mentioned earlier, there are two types of Steel for Packaging, depending on the metallic coating:
• Tinplate with a tin coating and, in most of the cases, a passivation layer made of Chromium compounds
• Electro Chromium Coated Steel (ECCS) or Tin-Free Steel (TFS) with a coating made of Chromium compounds

The choice between these two products is sometimes imposed by the type of packaging or guided by the aimed aspect or by the product to be packed.

Tin coating

Tin coating is usually a three-stage process:
1. electro tinning
2. tin flow-melting (optional)
3. chromium passivation (optional)

Passivation

The tinplate surface is in most cases passivated to stabilize the surface, typically by preventing the growth of tin oxides. The most common is passivation 311. It is an electrochemical treatment in a bath of sodium dichromate to deposit both metallic chromium and chromium oxide on the tin surface. We are also proposing passivation 310, a lighter version of passivation 311, when a better lacquer adhesion is required.

Chromium coating

Chromium coating was primarily developed as an economic alternative to tin coating. It is an electrolytic treatment in a bath of chromic acid to deposit metallic chromium and chromium oxide on the blackplate. The usual name is Electro Chromium Coated Steel (ECCS) or Tin-Free Steel (TFS). TFS is excellent for lacquer adhesion and must always be lacquered both faces before use. TFS is not suitable for welding or soldering. Its appearance is less attractive (lower brightness) than tinplate. The absence of tin makes TFS non appropriate for acidic food (pH < 4) because of lower corrosion resistance

Oiling

Oiling is necessary to reduce friction and scratches while handling the sheets. The three most common oil types are:
• DOS = dioctyl sebacate
• BSO = butyl stearate
• ATBC = acetyl tributyl citrate

Mechanical properties
 


Packing and shipping


Our Advantages 

We have over 10 years professional export experices.
Professional in Tinplate produce and export only.
Good quality,very competitive price,Reliable Service
Samples can be offered in free.
The DP,CIF,CFR,FOB items are very master and professionals.
Your money is safe by our business with T/T or L/C of China bank.
Control core products and resources and develop with you together.
Your logo can be OEM by us and supply strong business helps.
Help you to plan and open the new and big markets and supply new business.
24 hours online services for you.

Certificates

Company introduction

Established in 1998, Runfei Steel Group has developed into a large-scaled enterprise, located in the city of Tianjin, which is the largest artificial harbor in north China. With convenient transportation advantage of Tianjin, intellectual marketing network, powerful system of storage, processing and distribution, and good reputation, Runfei has successfully set up a win-win platform between mills and clients.

Runfei started its oversea trading since 2004 when it obtained the import and export license of proprietary trading, providing the international standard processing and distribution service for customers all over the world.

The headquarter of Runfei Steel Group is located in the CBD of Tianjin economical development region - Airport Economic Area.With the continuous expanding of business, Runfei had established Tianjin Runfei Trade Co., Ltd, Runfei (HK) Co., Limited, Tianjin Runfang Steel Processing Co., Ltd, andTianjin Runfei Steel Processing Co., Ltd. Runfei now owns one processing center for hot rolled steel and the other for cold rolled steel, both are located in Tianjin TEDA Industry Area, taking up over 113,220 square meters. The storage capacity of Runfei is 70,000 metric tons and the annual comprehensive processing capacity comes to 1 million metric tons.

Our goal is to become the comprehensive service center combined with proccessing, assorting and storage. Our mission is to be the pioneer of cost solution and service concept in steel industry chain.

RFQ
 

Q1: Where is your warehouse located? How can I visit your company?

 

A1: Our warehouse is located in Tianjin, about 10min drive from our office. All our clients, from home or abroad, are warmly welcome to take a visit here!

 

Q2: How does your company do regarding quality control?

 

A2: Quality is very important and always be put at the first place. SLM team members always pay great attention to quality controlling from the very beginning to the end.

 

Q3: Can I get some samples?

 

A3: Yes, sure, we are honored to offer you samples, moreover we offer video online.

 

Q4: What is your method of Transportation?

 

A4: We deliver by shipping, container, break bulk or as your requirements.

 

Q5: What's your Payment method supported?

 

A5: We accept T/T, L/C at sight etc.

 

Q6: What about your Warranty?

 

A6: It's 1 years warranty.