En-Tech Polymer Co.,Ltd

Thermal Paper Chemicals

Thermal paper chemicals

 

 

Chemicals details for Thermal paper

 

A. Under Coating

    i.       Pigment : GCC, PCC, Clay, TiO2, Hallow Plastic Pigment(Opaque Polymer) and so on

    ii.       Dye : LEUCO Dye

    iii.       Developer : Bisphenol A, Bisphenol S and so on

    iv.       Sensitizer : β-Naphthyl Benzyl Ether (NBE)

     v.       Sub Sensitizer : NTCOAT SN-28

    vi.       Lubricant : NTCOAT LB-40

    vii.      Binder (PVA, Latex) : : 1,700 Degree of Polymerization of Fully Hydrolysis PVA,

               General Latex

   viii.       Etc

 

B. Top Coating

     i.       Pigment : GCC, PCC, Clay, TiO2, Hallow Plastic Pigment(Opaque Polymer)

     ii.       Dye : Capsulated LEUCO Dye

     iii.       Developer : Bisphenol A, Bisphenol S and so on

     iv.       Sensitizer : β-Naphthyl Benzyl Ether (NBE)

      v.       Sub Sensitizer : NTCOAT SN-28

     vi.       Lubricant : NTCOAT LB-40

     vii.       Anti Blocking and Prevent Pressure coloring Agent : NTCOAT WE-430

    viii.       Binder (PVA, Latex) : : 1,700 Degree of Polymerization of Fully Hydrolysis PVA

 

C. Over Coating

       i.       Protection Layer : Specialized PVA, Acrylic Protection Binder and so on.

       ii.       Crosslinker : If PVA, Function(-OH) in PVA must be changed Hydrophilic to

                 Hydrophobic

      iii.       Anti Blocking and Prevent Pressure coloring Agent : WE-430

       iv.       etc

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About Thermal Paper

 

Thermal paper is that indicate letter, Top Coating Shape and form by reaction with heat

Thermal paper is produced by Coating on Base paper. Facsimile paper is typical of it.

(When you heat Thermal paper furtively by a cigarette lighter, you can see the paper’s color change to Black, Blue and Red, is depend on dye)

Thermal paper has a strong point that maintenance costs is cheap by using parts that produce heat is called THP(Thermal Head Printer) without Toner or Ink, so that new uses are developed continuously.

If assort Thermal paper besides Facsimile paper, Medical treatment paper (is used to Photographic Paper of MRI, CT and Supersonic wave), Synthetic Thermal paper, a pari-mutuel Ticket, Subway Ticket, POS, and Label.

Generally, Thermal paper becomes classify by Normal Thermal paper and Top Coating Thermal Paper greatly.

Normal Thermal paper’s kind is Facsimile paper and Thermal paper has generally a double coating layer.

Top Coating Thermal paper’s kind is POS and Photographic Paper is used in Medical treatment. These Top Coating Thermal papers is consisted by plastics that base is not paper.

Thermal paper Coating is able to sort by Under Coating, Top Coating, Over Coating, Normal is coated by Under and Top, Top Coating is coated by Under, Top and Over.

Each Layer functions are,

- Over Coating Layer is for Protecting Thermal Layer,

It means, above protecting is for keep away change of color happened by slight latent heat.

And, improving durability.

- Top Coating Layer(=Thermal Layer) is for Color shows by heat,

Thermal sensitizer is treated in this layer.

- Under Coating Layer is for improving smoothness and insulation (heat shield).

- In addition, sometimes, by prosperity of paper, there is case that Back Coating is required

It is for control Curl is appeared by Coating.

 

Kinetic sensitivity of Thermal Paper

Generally Thermal paper’s heat sensitivity is started from 70℃, and the highest sensitivity is above 110℃(Over OD1.20).

Thermal paper can sort by temperature and time of sensitivity, Low Sensitivity, Standard Sensitivity, High Sensitivity and Ultra high Sensitivity. Normal Thermal Paper is Standard Sensitivity.


Chemicals for Thermal paper can be sorted as follows,

  1. 1.    Main ingredient of Thermal Coating
    1. Under Coating

                         i.         Pigment

                        ii.         Dye

                       iii.         Developer

                       iv.         Sensitizer

                        v.         Sub Sensitizer

                       vi.         Lubricant

                      vii.         Binder (PVA, Latex)

                     viii.         etc

  1. Top Coating

                         i.         Pigment

                        ii.         Dye

                       iii.         Developer

                       iv.         Sensitizer

                        v.         Sub Sensitizer

                       vi.         Lubricant

                      vii.         Anti Blocking and Prevent Pressure coloring Agent

                     viii.         Binder (PVA, Latex)

                       ix.         etc

  1. Over Coating

                         i.         PVA (Protection Layer)

                        ii.         PVA Crosslinker (Function(-OH) in PVA can be changed Hydrophilic to

                                    Hydrophobic)

                       iii.         Anti Blocking and Prevent Pressure coloring Agent

                       iv.         etc

 

* PVA for grinding of dye or developer is fully hydrolysis type and Degree of Polymerization(DP) is 1,700.  DP of PVA for over coating is higher than 1,700.

 

2.    Our Chemicals for Thermal paper

Sort

Main Ingredient

Effect

Use Coating Layer

Lubricant

Zn stearate

Improving Lubrication & Sensitivity

Under & Top

Sub-Sensitizer

EBSA

Improving Sensitivity & Lubrication

Under & Top

Anti Blocking Agent

Paraffin Wax

Prevent Picking and

Improving Water Resistance

Top & Over

Crosslinker

PAE

Improving Water Resistance

Caused by PVA Crosslinking

Over

Dispersant

Sodium polycarbonate

Improving PCC Dispersibility

Under & Top

Opaque Polymer

Styrene Acrylate

Improving Hiding Power,

Whiteness and Smoothness

Under

 

3.    Compare with Other Company’s

Sub –Sensitizer

Brand Name

B-961

SN-28

Main Ingredient

Ethylene Bis Stearamide

Active Content (%)

28.0±1.0

pH

7.0±1.0

 

Lubricant

Brand Name

D-523

E-336

HZ-836

LB-40

Main Ingredient

Zinc Stearate

Active Content (%)

30.0±1.0

40.0±1.0

36.0±1.0

40.0±1.0

pH

7.5±1.0

 

Anti Blocking and Prevent Pressure coloring Agent

Brand Name

P-7

L-7

D-336

WE-430

WE-530

WE-730

Main Ingredient

Paraffin wax

Melting Point(℉)

130

155

145

130

140

155

Melting Point(C)

54.5

68

63

54.5

63

68

Active Content (%)

30.0±1.0

30.0±1.0

30.0±1.0

32.0±1.0

32.0±1.0

32.0±1.0

pH

8.0±1.0

8.0±1.0

8.0±1.0

9.0±1.0

9.0±1.0

9.0±1.0

 

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