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Heat sensitive paper applicable to tags without bottom paper and manufacturing method of heat sensitive paper

A manufacturing method and heat-sensitive paper technology, which is applied in special paper, paper, papermaking, etc., can solve the problems that the coated base material affects the roughness of the finished product, the surface fineness of the coated base paper is poor, and the coating uniformity is affected. High surface smoothness, low roughness, smooth marking effect

Pending Publication Date: 2019-07-26
JIANGSU WANBAO RUIDA HI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface fineness of the existing coated base paper is generally poor, and the roughness of the coated substrate greatly affects the roughness of the finished product.
In addition, thermal paper with top coating is generally used for ordinary labels. In order to adapt to continuous printing and various printing conditions, the protective coating on the surface generally has good absorption, and the coating is relatively open. When the silicone oil layer is applied, it is easy to cause silicone oil to migrate into the coating, which affects the uniformity of the coating and causes waste of cost

Method used

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  • Heat sensitive paper applicable to tags without bottom paper and manufacturing method of heat sensitive paper

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Experimental program
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Effect test

Embodiment 1

[0029] A thermal paper suitable for linerless labels such as figure 1 As shown, it consists of substrate layer 1, primer layer 2, heat-sensitive layer 3, and protective layer 4 from bottom to top. The substrate layer 1 is preferably wood pulp base paper, the smoothness of the coated surface is ≥ 90s, and the smoothness of the non-coated surface is ≥ 50s. The two components of the primer layer contain calcined kaolin, hollow spherical plastic pigments and styrene-butadiene latex, and the solid content of the hollow spherical plastic pigments accounts for more than 40% of the total solid content of the components. The heat-sensitive layer 3 contains styrene-butadiene latex or polyvinyl alcohol as an adhesive, and contains a polyolefin polymer resin water-repellent agent. The 4 components of the protective layer contain modified polyvinyl alcohol, a crosslinking agent, and a water-repellent agent for polyolefin polymer resin.

Embodiment 2

[0030] Embodiment 2: prepare primer coating solution

[0031] First, weigh the components for preparing the primer coating in the following parts by weight: 0.5 to 1.0 parts of inorganic dispersant, 20 to 40 parts of calcined kaolin, 40 to 70 parts of hollow spherical plastic pigments, 5 to 15 parts of styrene-butadiene latex, Calcium stearate lubricant 2-4 parts, defoamer 1-2 parts. Then, add water to the preparation tank, start stirring, add inorganic dispersant, slowly add calcined kaolin, 600rpm / min high-speed dispersion for 60min, then add hollow spherical plastic pigment, styrene-butadiene latex, lubricant and defoamer, 100rpm / min low speed After stirring for 20 minutes, measure the solids content of the coating to form a primer coating solution for later use.

Embodiment 3

[0032] Embodiment 3: Preparation of thermosensitive layer coating solution

[0033]First, weigh the components for preparing the heat-sensitive layer coating according to the following parts by weight: 0.5 to 1 part of dispersant, 30 to 40 parts of light calcium carbonate grinding liquid, 20 to 30 parts of developer grinding liquid, 10 parts of leuco dye ~20 parts, 5~15 parts of sensitizer grinding liquid, 3~6 parts of PVA glue, 1~2 parts of wetting agent, 2~3 parts of lubricant, 3~8 parts of polyolefin polymer resin water repellent , 0.5 to 1 part of defoamer. Then, add a small amount of water to the heat-sensitive layer preparation tank, start stirring, and then add dispersant, light calcium carbonate grinding liquid, color developer grinding liquid, leuco dye grinding liquid, sensitizer grinding liquid, 300rpm / min speed Stir for 40 minutes, then add PVA glue, wetting agent, lubricant, polyolefin polymer resin anti-water agent and defoamer in sequence, continue stirring for...

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Abstract

The invention discloses heat sensitive paper applicable to tags without bottom paper and a manufacturing method of the heat sensitive paper. High-smoothness high-quality wood base paper is selected ascoating base paper, the surface of the base paper is sequentially coated with a bottom coating, a heat sensitive layer and a protection layer, inboard double-roller soft calendering finishing of thebottom coating and the heat sensitive layer is implemented, overboard overpressure finishing of the dried protection layer is implemented, and the smoothness of a coating surface of a final finished product is higher than or equal to 2000s. Compared with the prior art, the produced heat sensitive paper has higher surface smoothness and low roughness, water resistance of the coatings is high, the tags without the bottom paper is made, the surface of the paper is coated with silicone oil, the back of the paper is coated with glue, and quality stability, cost control and uniformity of a siliconeoil layer and a glue layer can be effectively achieved.

Description

technical field [0001] The invention relates to a heat-sensitive paper suitable for a bottomless paper label and a manufacturing method thereof. [0002] technical background [0003] Today, the concept of green environmental protection is deeply rooted in the hearts of the people. Due to its excellent performance in environmental protection and cost saving, the label market is paying more and more attention to it. There are more and more developments and applications of linerless labels at home and abroad. [0004] A linerless thermal label is a linerless label that uses thermal paper as the surface material. Generally, it is divided into a single-layer linerless thermal label and a two-layer linerless thermal label. The linerless labels that need to be printed are generally printed on the coated surface of the thermal paper, and then coated with a layer of silicone oil on the surface of the printed surface to prevent the self-adhesive labels from sticking to each other. T...

Claims

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Application Information

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IPC IPC(8): D21H19/82D21H19/40D21H19/42D21H19/58D21H19/44D21H19/38D21H21/14D21H21/28D21H19/60D21H19/56D21H27/00
CPCD21H19/82D21H19/40D21H19/42D21H19/58D21H19/44D21H19/385D21H21/14D21H21/28D21H19/60D21H19/56D21H27/00
Inventor 王道力唐宏磊钟亚伍亓华利
Owner JIANGSU WANBAO RUIDA HI TECH CO LTD
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