TWI765799B - TPU pressure sensitive adhesive - Google Patents

Abstract

The invention provides a TPU pressure-sensitive adhesive, which comprises: a high-polarity base material layer; a high-polarity adhesive layer, wherein the components of the high-polarity adhesive layer include: thermoplastic polyurethane 50-90%; resin 5-50%, and thermoplastic polyurethane It is a linear block copolymer composed of the soft segment of oligomer polyol and the hard segment of diisocyanate-chain extender, so thermoplastic polyurethane will contain NCO (isocyanato) functional group, which leads to hydrogen bonding. Therefore, the adhesive layer can be well attached to the high-polarity material, whether it is the bonding between the production process and the substrate layer, or bonding to other items in actual use.

Description

TPU pressure sensitive adhesive

The present invention relates to a TPU pressure-sensitive adhesive, which is commonly used for lamination of polar materials, lamination of cloth, and the like.

Glue can be said to be an indispensable substance in life. It has the characteristics of fast sticking and fixing items. Depending on the production method, glue can have many forms. Among them, pressure-sensitive glue is a kind of glue that is quite well known. .

Pressure-sensitive adhesive is a kind of colloid that is quite common in life and has a wide range of applications. At present, most of the pressure-sensitive adhesives used on the market are TPR hot melt adhesives, but TPR hot melt adhesives have a big disadvantage, that is, TPR Hot melt adhesive is a kind of non-polar pressure-sensitive adhesive. TPR hot melt adhesive composed of non-polar molecules has better bonding ability to some weakly polar materials, but if it is to be attached to the surface of highly polar materials, the bonding ability will change. In addition, in the production process of non-polar TPR hot-melt adhesive, the bonding of the adhesive layer and the highly polar material must use a treatment agent to change the polarity difference, which not only increases the cost of an additional procedure.

Based on the above content, it can be seen that due to its non-polar characteristics, the pressure-sensitive adhesives currently on the market must rely on the treatment agent to assist in the manufacturing process or the subsequent process of attaching to highly polar materials. This problem It can be a problem that is eager to improve in the current industry.

The adhesive layer of the present invention contains thermoplastic polyurethane, and the thermoplastic polyurethane is a linear block copolymer composed of the soft segment of oligomer polyol and the hard segment of diisocyanate-chain extender, so the thermoplastic polyurethane will contain NCO (isocyanurate). Cyanate group) functional group, this functional group leads to the generation of hydrogen bonds and has high polarity, so whether it is the bonding between the production process and the substrate layer, or bonding to other items in actual use, the adhesive layer can be very good. Fits highly polar materials.

In order to achieve the above objects and effects, the present invention provides a TPU pressure-sensitive adhesive, which includes: a high-polarity base material layer; a high-polarity adhesive layer, which is attached to the high-polarity base material layer, and the high-polarity adhesive layer The ingredients include: thermoplastic polyurethane 50-90%; resin 5-50%; wherein the percentages are by weight and are selected from the stated ranges so that the total is 100%.

1: High polarity substrate layer

2: High polarity adhesive layer

The first figure is a schematic structural diagram of the present invention.

For a more detailed understanding of the style of this creation, please watch it with the first picture.

In order to understand the effect of the present invention in detail, each material is described in detail here; the high polarity substrate layer 1 can be one of PET, PBT, PETE film, polyester cloth, PVC film, nylon, and ABS.

The thermoplastic polyurethane can be one of polyester, polyether, polyester-polyether copolymer, or a combination of any two or a combination of three, so that the thermoplastic polyurethane contains NCO (isocyanato) functional groups.

The resin can be hydroxyl, maleic anhydride modified, carbon five-carbon nine (C5-C9) copolymer resin, carbon five (C5) hydrogenated resin, carbon nine (C9) hydrogenated resin, various modified petroleum resins; rosin resin and All kinds of rosin resin modification, unhydrogenated rosin resin, hydrogenated rosin resin, alkyl benzene resin, α-methyl styrene resin, terpene resin, terpene phenol resin, terpene resin modification, phenolic esterified rosin, The esterified rosin resin and the modified esterified rosin resin can be one or a mixture of any two or three, and it can be a solid resin or a liquid resin.

The processing oil can be one of white wax oil, dicarboxylates, tricarboxylates, adipates, epoxy vegetable oils, and citric esters, or a mixture of any two or three.

The present invention is a TPU pressure-sensitive adhesive, which includes: a high-polarity base material layer 1; a high-polarity adhesive layer 2, which is attached to the high-polarity base material layer 1, and the high-polarity adhesive layer 2 has components including: : thermoplastic polyurethane 50~90%; resin 5~50%; wherein the percentages are by weight and selected from the stated ranges so that the total is 100%.

Continuing the above content to further describe the present invention, first, the formula of the high polar adhesive layer 2 contains thermoplastic polyurethane (TPU), and the thermoplastic polyurethane is composed of the soft segment of the oligomer polyol and the hard segment of the diisocyanate-chain extender. Linear block copolymer, so the thermoplastic polyurethane will contain NCO (isocyanato) functional group, this NCO functional group leads to the generation of hydrogen bonds and has high polarity, so the high polarity adhesive layer 2 can be very good in the production process. Therefore, it is not necessary to add a treatment agent between the high-polarity adhesive layer 2 and the high-polarity base material layer 1 as conventionally known, which indeed reduces the production cost and reduces the production cost. However, when the present invention is actually used, when the high-polarity adhesive layer 2 is attached to other high-polarity articles, the high-polarity adhesive layer 2 can be well attached to the high-polarity articles.

In addition, another formulation of the high-polarity adhesive layer 2 of the present invention is provided. The components of the high-polarity adhesive layer 2 comprise: thermoplastic polyurethane 50-90%; resin 5-50%; processing oil 1-30%, generally speaking, if hot plastic The molecular weight of thermoplastic polyurethane itself is very low, and it can be made by stirring, mixing or other processes after heating up, so that processing oil does not need to be added, but if the molecular weight of thermoplastic polyurethane itself is too high, processing oil needs to be added. The urethane becomes softer and improves processability, so this formulation can use higher molecular weight thermoplastic urethanes.

The above descriptions are only used to explain the preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Therefore, any modification of the present invention is made under the same spirit of the invention. Or modified, other forms that can be implemented and have the same effect should still be included in the scope of the intended protection of the present invention.

To sum up, the "TPU pressure-sensitive adhesive" of the present invention, in terms of practicality and cost-effectiveness, is indeed fully in line with the needs of industrial development, and the disclosed invention is also an unprecedented innovation, so it has "novelty". ” and “progressiveness” should not be doubted, it fully complies with the requirements of the Patent Law of my country on the application requirements for invention patents, and it is a patent application filed in accordance with the law.

1: High polarity substrate layer

2: High polarity adhesive layer

Claims (4)

A TPU pressure-sensitive adhesive, comprising: a high-polarity base material layer; a high-polarity adhesive layer, which is attached to the high-polarity base material layer, and the components of the high-polarity adhesive layer include: thermoplastic polyurethane 49-90% Resin 5~50%; Processing oil 1~30%; Wherein these percentages are by weight and selected from the described range so that the total is 100%; Wherein the processing oil can be white wax oil, dicarboxylate, A mixture of any two or three of tricarboxylic acid esters, adipate esters, epoxy vegetable oil and citric acid esters. The TPU pressure-sensitive adhesive according to claim 1, wherein the thermoplastic polyurethane can be one or a combination of any two or a combination of three of polyester, polyether, and polyester-polyether copolymer. The TPU pressure-sensitive adhesive as claimed in claim 1, wherein the resin can be hydroxyl, modified with maleic anhydride, carbon five-carbon nine (C5-C9) copolymer resin, carbon five (C5) hydrogenated resin, carbon nine (C9) ) hydrogenated resin, various modified petroleum resins; unhydrogenated rosin resin, hydrogenated rosin resin, alkyl benzene acid resin, α-methyl styrene resin, terpene resin, terpene phenol resin, modified terpene resin, phenolic resin One of esterified rosin, esterified rosin resin and esterified rosin resin modification or a mixture of any two or three. The TPU pressure-sensitive adhesive according to claim 1, wherein the high-polarity base material layer can be one of PET, PBT, PETE film, polyester cloth, PVC film, nylon, and ABS.

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