How to apply thermal transfer technology

Continuing from last time, Do you have a preliminary understanding of thermal transfer technology? Hope it helps you. Closer to home, Today’s content is about how to apply thermal transfer technology and what needs to be paid attention to

Review what is the principle of thermal transfer printing?

Simply put, dispersed dyes (or sublimation ink) are pre-printed (or printed) on a specific paper through a machine, and then the pattern on the paper is transferred to the fabric using high temperature and high pressure through this paper. Printing is required to complete the entire process. Transfer printing process. However, with the development of technology, the industry has undergone some refinements, allowing transfer printing methods to emerge endlessly. The most prominent thing is that paper is also used as a transfer printing carrier, but the printing method is gravure printing machine printing disperse dyes as the mainstream.

According to the transfer printing market demand, the most commonly used printing methods are:

heat transfer stickers for t shirts
heat transfer label

(1) Gravure printing machine prints disperse dyes. The advantages are low printing paper cost, delicate pattern performance, strong layering, and full patterns. Suitable for mass transfer printing production. The disadvantage is that the cost of plate making is high and it is not competitive enough for small batches of personalized products.

(2) Use an offset printing machine to print offset sublimation ink. Use your printer to print with sublimation ink. After drying naturally, use this decal paper to transfer it to the fabric to be printed. Advantages: Due to the use of PS printing, the printing cost is low, the printing cost is also low, and it is suitable for small-batch product printing. Disadvantages: It is difficult to control the color depth after printing.

(3) Digital thermal transfer, advantages: the pattern expression is more delicate than other transfer methods, the layering is strong, the pattern is extremely full, and due to the use of plateless printing, the inaccurate color registration caused by other printing methods is completely avoided. disuse. Or the shortcomings of the plug-in version. Disadvantages: Although there are no printing fees, printing ink and paper costs are higher. Currently, it is only suitable for transfer printing of small batches of personalized products.

(4) Silkscreen sublimation ink. This transfer printing method has a low plate-making cost and sublimation ink is not expensive. However, since the printing plate is a screen version, burrs will appear on the edges of the pattern, making it unsuitable for delicate patterns such as figures and landscapes. Print.

Types of clothing Thermal transfer technology

There are two main categories of common heat transfer printing methods: sublimation heat transfer and heat transfer printing.

  • Sublimation heat transfer

Dye printing or sublimation printing is a digital printing technology that uses full-color artwork for polyester and polymer-coated garments or items. This process is also known as digital sublimation and is commonly used to decorate apparel, logos, and banners. Also suitable for items such as pillows, plaques, coffee mugs, and other smaller items that are easily sublimated. This process uses sublimation science to apply pressure to the surface of solid objects by applying dyes that are in a gaseous state without passing through the liquid stage for printing.

The process consists of 3 general steps:

(1) Load the sublimation dye into the printer

(2) Transfer the design to transfer paper

(3) Heat the transfer paper to transfer the ink to the product surface

The final product is less likely to fade, crack, or peel than other similar printing methods.

  • Heat transfer printing

Different from the sublimation thermal transfer printing method, the printing material does not sublimate (vaporize) like sublimation dyes. The printing material will not print at high temperatures and high pressure, causing the slurry to penetrate the fabric fibers. Although it can also be pressed with a transfer machine, what is “printed” on the surface of the clothing is like a layer of “plaster” attached to the surface of the clothing.

Precautions:

 

(1) Accurately adjust the three elements of temperature, time and pressure according to the characteristics of different fabrics.

 

(2) When ironing, cut out the pattern, put it on the clothes and then iron it at high temperature before tearing it off.

 

(3) In order to prevent the heating plate from directly contacting the fabric and avoid the whitening phenomenon of dark fabrics after ironing, it is recommended to place a piece of breathable cotton cloth on the heating plate before ironing.

 

(4) For the water washing test, it needs to be cooled and left for 24 hours before being put into the washing machine for washing.

 

(5) Storage method: In order to prevent the fabric from getting damp and exposed to high temperatures, which will cause the fastness to deteriorate after ironing, the product should be sealed and stored in a ventilated and dry place.

 

Share Post