FAQ – Frequently Asked Questions
Our range of heat shrink products predominantly serves the industrial sector, requiring tailored recommendations to assist our clients in selecting the most suitable product for their specific applications. This is why we primarily engage with our clients through email communication. However, we’ve observed a growing trend where certain products, such as our anti-slip heat shrink tubing, are increasingly sought after by end users.
To accommodate this shift, we’ve made our anti-slip heat shrink tubing available for direct purchase through our online shop at https://heatshrink.co.nz/shop/. Additionally, we are in the process of expanding our product offerings to include more options tailored for end users, which will be available soon.
Furthermore, we’ve established a Trademe Store specifically tailored for retail customers, where select popular products will be featured. You can explore our offerings in this store by visiting: https://www.trademe.co.nz/a/search?member_listing=7851581&bof=jo5dwZyE.
We encourage you to take a look at both our online shop and Trademe Store for your convenience. If you have any questions or require further assistance, please don’t hesitate to reach out to us.
The simple answer is No. So be careful before you apply heat shrink tube on your objects.
For products in stock, we would ship the same day or the next day. For Value-added services (like cutting to a length, printing on heat shrink tubes), we typically ship within 48 – 72 hours during the working days. For the products not in stock, it will be shipped from China, the order period is 2 months ahead. Usually, Dicore will prepare a stock of heat shrink tubing for our long-term customer.
Dicore operates as a factory based in China, specializing in the production of heat shrink tubing. Our primary clientele consists of industrial companies and distributors.
For our standard items in stock, such as general-purpose heat shrink tubing packaged in rolls, the minimum order quantity (MOQ) is determined by the packaging size – typically a full roll containing 200m, 100m, or 50m, depending on the specific dimensions.
However, for customized orders, we assess the minimum order quantity (MOQ) on a case-by-case basis, tailoring it to the unique requirements of each individual order.
Using flame-retardant heat shrink tube means safety to you and your society. Our heat shrink tube will be self-extinguishing when exposed to an open flame, it will effectively prevent the spread of the flame.
Our tubes are all flame-retardant and are compliant to UL VW-1 standard, we take our safety in the first place.
PVC heat shrink tube was very popular in the market in the old times, because of its low cost. Dicore doesn’t sell this kind of product. But even now it is still selling in the market, please don’t use this PVC heat shrink tubing for the sake of safety.
We promise to reply to any enquiries within 24 hours in working date, our professional staff will get back to you as soon as possible.
Generally speaking, we could supply free samples for our potential customers to test. But the freight will be paid by our potential customers, either by providing their courier account or paying freight to our account.
The most popular material used for making heat shrinks is Polyolefin (PE), there are also other materials such as PTFE (Polytetrafluoroethylene), FEP (Fluorinated ethylene propylene), PVDF (polyvinylidene difluoride), Elastomers, Silicon rubber, Viton, and other special materials.
There are also Polyvinyl chloride (PVC) heat shrink tubing which is not so popular now because it is not flame-retardant, but you could still see in the market due to its low cost.
In most instances, heat shrink tubing is very easy to work with and simple to shrink.
Heat Gun is the most common tool used for shrinking the heat shrink tubing. Heat oven is also used in some factory to make the Installation of heat shrinkable tubing stable and fast.
For some heavy wall heat shrink tubing, a Gas Flamer will be a better choice because of its higher temperature.
Inside Diameter is the diameter of the tube when it is round shape.
Flat Width is the diameter of the tube when it is flat.
Flat Width = Inside Diameter * π / 2
Please note shrink tubing does not only shrink in diameter, but also the length. It is called Longitudinal shrinking. but it’s usually less than 10%, so you should choose a shrink tube that is a bit longer than you need.
Wall thickness before shrinking: Wall thickness before you shrink the tube.
Wall thickness after full recovery: The max wall thickness, usually the real thickness is smaller because it’s not fully recovered.
Inner Diameter before shrinking: Inner diameter before you shrink the tube.
Inner Diameter after full recovery: The smallest diameter, usually the real diameter is bigger because it’s not fully recovered.
Shrink ratio: Usually it is 2:1, 3:1, 4:1 or even 6:1
With adhesive or Not: Also recognised as a single wall or dual wall. Without adhesive means not waterproof.
Minimum shrink temperature: The Minimum temperature to make the tube start shrinking.
Operating Temperature: The temperature range the tube could resist for a long time, like years.
Heat shrink tubing has different shrink ratios, like 2:1, 3:1, 4:1 and 6:1. These describe the maximum size change before and after the shrink process. For example, the size of the shrink tubing is reduced from 10mm to 5mm, if the shrink ratio is 2:1.
So firstly, you need to measure the diameter of the biggest part and the smallest part of your object to cover, for example, 11mm and 5mm, then you will choose a tube of 3:1 shrink ratio, 12.7mm size.