Anti-bleeding hot melt adhesive label

Abstract

The utility model discloses an anti-bleeding hot melt adhesive label which comprises a hot melt adhesive label body, the hot melt adhesive label body comprises a nylon hot melt adhesive layer, the top of the nylon hot melt adhesive layer is coated with a PE layer, and the top of the PE layer is provided with a high-density HDPE layer. The high-density HDPE layer comprises a bottom coating layer, a character layer and a gloss oil layer, and the bottom coating layer, the character layer and the gloss oil layer are sequentially arranged from bottom to top. According to the hot melt adhesive label, the high-density HDPE layer which is soft and good in attaching performance is combined with the nylon hot melt adhesive layer which is high in polarity, and meanwhile the PE layer is combined, so that the obtained hot melt adhesive label can be used as a label material of the sun shield, is good in flatness attaching performance and shielding performance, has the functions of preventing color bleeding and glue overflowing, can be widely applied to various attached objects, and can be widely applied to various attached objects. And use requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of hot melt adhesive labels, in particular to an anti-bleeding hot melt adhesive label. Background Art

[0002] When selecting materials for sun visor labels, pressure-sensitive adhesive and hot-melt adhesive are selected as adhesive materials. Commonly used hot-melt adhesives include EVA resin and TPU resin. The bonding strength of pressure-sensitive adhesive is not high, and the bonding strength will drop rapidly when heated. The bonding strength of hot-melt adhesive is higher than that of pressure-sensitive adhesive, but it also has the problem of heat resistance. When this type of product is heated to more than 120 degrees, it is easy to overflow.

[0003] In addition, when selecting the surface material for the sun visor label, PET material and PVC material are often used. Since PET material has a relatively high stiffness, this type of material does not fit well on the object being pasted, and sometimes the shrinkage rate is inconsistent with the object being pasted, which often leads to bulging. PVC material has good conformability, but PVC material is not environmentally friendly and will produce toxic and harmful gases such as dioxins during subsequent combustion treatment. Due to their own material characteristics, the range of applicable objects for PVC and PET materials is not very large. In addition, PVC material is prone to color bleeding when pasting dark-colored objects. Based on the above situation, we have proposed an anti-color bleeding hot melt adhesive label. Utility Model Content

[0004] The utility model aims to solve the shortcomings of the prior art and provides an anti-bleeding hot melt adhesive label.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An anti-bleeding hot melt adhesive label, comprising a hot melt adhesive label body, wherein the hot melt adhesive label body comprises a nylon hot melt adhesive layer, a PE layer is coated on the top of the nylon hot melt adhesive layer, and a high-density HDPE layer is provided on the top of the PE layer;

[0007] The high-density HDPE layer comprises a primer layer, a text layer and a varnish layer, and the primer layer, the text layer and the varnish layer are arranged in sequence from bottom to top.

[0008] Preferably, the nylon hot melt adhesive layer is suitable for a variety of adhered objects due to its high polarity, and the material of the nylon hot melt adhesive layer is nylon particles, the melting point of the hot melt adhesive is 90-150°C, the melt index is 2-15g / 10min, accounting for 20-40% of the total weight, wherein the nylon hot melt adhesive layer also contains white HDPE masterbatch and carbon black, wherein the HDPE used in the white HDPE masterbatch and the HDPE in the high-density HDPE layer are the same substance.

[0009] Preferably, the PE layer is a mixture of maleic anhydride modified PE and HDPE, which accounts for 5-45% of the total weight, and the PE layer is a multi-layer arrangement.

[0010] Preferably, the total thickness of the hot melt adhesive label body is less than 100 microns, the thickness of the nylon hot melt adhesive layer and the high-density HDPE layer is the same, 5-45 microns, and the thickness of the PE layer is 2-30 microns.

[0011] Preferably, the melting point of the high-density HDPE layer is higher than that of the nylon hot-melt adhesive layer, and the difference in melting points is 10-30°C.

[0012] Preferably, the addition ratio of white HDPE masterbatch in the high-density HDPE layer is 5-25%, and the addition ratio of white HDPE masterbatch in the PE layer is 5-15%.

[0013] Compared with the existing technology, the beneficial effects of the utility model are:

[0014] The utility model adopts a high-density HDPE layer with good softness and conformability, combined with a nylon hot-melt adhesive layer with high polarity, and combined with a PE layer at the same time. The obtained hot-melt adhesive label can be used as a sun visor label material, and has good flatness and conformability, good shielding properties, and has the functions of preventing color bleeding and glue overflow. It can be widely used on a variety of objects to meet usage needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic structural diagram of an anti-bleeding hot-melt adhesive label.

[0016] In the figure: 1, nylon hot melt adhesive layer; 2, PE layer; 3, high-density HDPE layer; 301, base coating layer; 302, text layer; 303, varnish layer. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0018] Reference Figure 1 , a color-proof hot-melt adhesive label, comprising a hot-melt adhesive label body, the hot-melt adhesive label body comprising a nylon hot-melt adhesive layer 1, wherein the nylon hot-melt adhesive layer 1 is suitable for pasting a variety of pasted objects due to its high polarity, accounting for 20-40% of the total weight, and the material of the nylon hot-melt adhesive layer 1 is nylon particles, the melting point of the hot-melt adhesive is 90-150°C, the melt index is 2-15g / 10min, and the melt index test is conducted under the conditions of 2.16kg and 160°C, wherein the nylon hot-melt adhesive layer 1 also contains white HDPE masterbatch and carbon black;

[0019] The top of the nylon hot melt adhesive layer 1 is coated with a PE layer 2, wherein the PE layer 2 is a mixture of maleic anhydride modified PE and HDPE, which accounts for 5-45% of the total weight, and the PE layer 2 is a multi-layer arrangement. In order to enhance the anti-coloring performance, an additional PE layer 2 can be added, and the multi-layer PE layer 2 is carried out by a multi-layer co-extrusion process; a high-density HDPE layer 3 is arranged on the top of the PE layer 2, wherein the total thickness of the hot melt adhesive label body is less than 100 microns, the thickness of the nylon hot melt adhesive layer 1 and the high-density HDPE layer 3 are the same, the thickness is 5-45 microns, the thickness of the PE layer 2 is 2-30 microns, the thickness of the two side layers of the PE layer 2 is consistent, which is conducive to maintaining the flatness of the film, and the thickness of the PE layer 2 cannot exceed 40% of the outermost layer; the melting point of the high-density HDPE layer 3 is higher than the melting point of the nylon hot melt adhesive layer 1, and the melting point difference is 10-30°C, the HDPE used in the white HDPE masterbatch and the HDPE in the high-density HDPE layer 3 are the same substance, and the addition of carbon black can improve the shielding property;

[0020] The high-density HDPE layer 3 includes a primer layer 301, a text layer 302 and a varnish layer 303, and the primer layer 301, the text layer 302 and the varnish layer 303 are arranged in sequence from bottom to top, wherein the addition ratio of white HDPE masterbatch in the high-density HDPE layer 3 is 5-25%, and the addition ratio of white HDPE masterbatch in the PE layer 2 is 5-15%; the utility model adopts a high-density HDPE layer 3 with good softness and conformability, combined with a nylon hot-melt adhesive layer 1 with high polarity, and combined with a PE layer 2 at the same time, the obtained hot-melt adhesive label can be used as a sun visor label material, and it has good flatness and conformability, good shielding, and has the function of preventing color bleeding and overflowing glue. It can be widely used on a variety of objects to meet the use requirements.

[0021] Working principle: The high-density HDPE layer 3 is very suitable for label materials due to its softness and good adhesion. The nylon hot melt adhesive layer 1 is suitable for a variety of objects due to its high polarity. Therefore, in order to comprehensively utilize the performance of these two materials, according to the principle of similar polarity and similar compatibility, HDPE is a non-polar substance and nylon is a polar substance. If HDPE and nylon are simply bonded to each other, the two layers will be delaminated due to their different polarities. In order to increase the bonding force between the two layers, a PE layer 2 is set in the middle for bonding. Since PE layer 2 is a mixture of maleic anhydride modified PE and HDPE, and maleic anhydride modified PE has both polar groups and non-polar groups, the polar groups and the nylon hot melt adhesive layer 1 are connected by chemical bonds, and the non-polar groups The high-density HDPE layer 3 is connected by chemical bonds, thereby achieving effective combination of the nylon hot-melt adhesive layer 1 and the high-density HDPE layer 3, and the setting of the maleic anhydride modified PE can improve the bonding force between the nylon hot-melt adhesive layer 1 and the PE layer 2. In addition, adding masterbatch and other additives to the PE layer 2 can improve the hiding and anti-bleeding capabilities. In addition, in order to ensure warping, the PE layer 2 can adopt three-layer co-extrusion or four-layer co-extrusion. The combination of three or more layers can achieve the anti-bleeding effect, and the hiding and anti-bleeding levels can be effectively improved. Through the combination of the high-density HDPE layer 3, the PE layer 2 and the nylon hot-melt adhesive layer 1, the hot-melt adhesive label body has the characteristics of anti-overflow glue. In addition, it has good conformability and can effectively reduce the bulging phenomenon.

[0022] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hot melt adhesive label with anti-bleeding, comprising a hot melt adhesive label body, wherein the hot melt adhesive label body comprises a nylon hot melt adhesive layer (1), characterized in that: The top of the nylon hot melt adhesive layer (1) is coated with a PE layer (2), and the top of the PE layer (2) is provided with a high-density HDPE layer (3); The high-density HDPE layer (3) comprises a primer layer (301), a text layer (302) and a varnish layer (303), wherein the primer layer (301), the text layer (302) and the varnish layer (303) are arranged in sequence from bottom to top.

2. The anti-bleeding hot melt adhesive label according to claim 1, characterized in that: The nylon hot melt adhesive layer (1) is suitable for bonding a variety of objects due to its high polarity.

3. The anti-bleeding hot melt adhesive label according to claim 1, characterized in that: The PE layer (2) is a multi-layer arrangement.

4. The anti-bleeding hot melt adhesive label according to claim 1, characterized in that: The total thickness of the hot melt adhesive label body is less than 100 microns, the thickness of the nylon hot melt adhesive layer (1) and the high-density HDPE layer (3) are the same, 5-45 microns, and the thickness of the PE layer (2) is 2-30 microns.

5. The anti-bleeding hot melt adhesive label according to claim 1, characterized in that: The melting point of the high-density HDPE layer (3) is higher than the melting point of the nylon hot-melt adhesive layer (1), and the melting point difference is 10-30°C.

Images