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Pressure-sensitive adhesive tape or sheet, and process for producing pressure-sensitive adhesive tape or sheet

A technology of adhesive tapes and adhesives, applied in bandages, adhesive dressings, medical science, etc., can solve problems such as hardening and insufficient suppression of void ratio

Active Publication Date: 2007-10-17
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve these problems, it has been proposed to use non-woven fabrics as a support (Japanese Patent 3556208), but non-woven fabrics generally have a problem that the reduction in void ratio cannot be sufficiently suppressed, although they can easily retain fillers
This method is useful in consideration of production stability because penetration and leakage of the adhesive solution to the back does not occur, however, when the film is adhered to the skin for a long period of time, it becomes hard if the film does not have air permeability

Method used

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  • Pressure-sensitive adhesive tape or sheet, and process for producing pressure-sensitive adhesive tape or sheet
  • Pressure-sensitive adhesive tape or sheet, and process for producing pressure-sensitive adhesive tape or sheet
  • Pressure-sensitive adhesive tape or sheet, and process for producing pressure-sensitive adhesive tape or sheet

Examples

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no. 1 example

[0082] Fig. 1 is a sectional view of a pressure-sensitive adhesive tape or sheet (hereinafter simply referred to as "pressure-sensitive adhesive tape") in one embodiment of the present invention. The pressure-sensitive adhesive tape 10 of the present invention includes a support 1 and a pressure-sensitive adhesive layer 2 arranged on one face of the support 1, and the support 1 is treated with a filler. The support body 1 is constituted by a laminate of a two-layer structure, including a first base material 3 and a second base material 4, and a pressure-sensitive adhesive layer 2 is arranged on the first base material 3 so that the second base material 4 acts as a The outermost layer 5 on the support side.

[0083] The first substrate includes a non-woven fabric produced by a melt-blown method. By using the melt-blown non-woven fabric, hardening can be prevented due to its good air permeability, and the filling process can be easily performed due to the high density of the me...

no. 2 example

[0099] Fig. 2 is a sectional view showing an adhesive tape according to another embodiment of the present invention. The pressure-sensitive adhesive tape 20 includes a support body 1 and a pressure-sensitive adhesive layer 2 arranged on one face of the support body 1 . The support 1 consists of a laminate comprising a first substrate 3 and a second substrate 4 arranged on both sides of the first substrate 3 and which is designed as the support side The outermost layer 5. The pressure-sensitive adhesive tape in the second embodiment is different from the pressure-sensitive adhesive tape including the laminated body of the two-layer structure in the first embodiment in that the support body in the second embodiment has a three-layer structure. The two base materials constituting the support may be the same or different. The compositions of the first base material and the second base material and the pressure-sensitive adhesive layer are the same as those described in the first...

Embodiment 1

[0157] Laminated on both sides of a non-woven fabric (made of polyester, thickness: 25 μm, fiber diameter: 1.8 μm) produced by a meltblown method with a bulk density of 0.21 g / cm produced by a spunbond method 3 After the non-woven fabric (made of polyester, thickness: 80μm, fiber diameter: 14μm), apply 25g / m 2 The filler is used for filling treatment, so as to obtain the support body after filling treatment. Boncoat R3360 (trade name, manufactured by Dainippon Ink and Chemicals Inc.) was used as the filler. The air permeability of the obtained support was 12 seconds / 100 cc. Subsequently, the pressure-sensitive adhesive layer obtained above was transferred onto the filling-treated support to obtain a pressure-sensitive adhesive sheet.

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Abstract

The invention relates to a pressure-sensitive adhesive tape or sheet, which comprises a support and a pressure-sensitive adhesive layer disposed on one side of the support, in which the support comprises a first substrate and a second substrate disposed on at least one side of the first substrate and is treated with a filling agent, the first substrate includes a melt blow nonwoven fabric, the second substrate includes a span bond nonwoven fabric having a bulk density of from 0.05 to 0.3 g / cm 3 , and the second substrate is arranged as the outermost layer on the support side; a pressure-sensitive adhesive tape or sheet, which comprises a laminate of a plurality of substrates and a pressure-sensitive adhesive layer disposed on at least one side of the laminate, the plurality of substrates being treated with a filling agent, and the pressure-sensitive adhesive tape or sheet having a loop hardness of from 15 to 60 mN; and a process for producing a pressure-sensitive adhesive tape or sheet in which a plurality of substrates constituted of paper and / or napkin are laminated and a pressure-sensitive adhesive layer is disposed on at least one side of the laminated substrates, the process comprising applying a filling agent on the plurality of substrates to conduct a filling treatment, and then coating an adhesive solution by a direct application method, followed by drying.

Description

technical field [0001] The present invention relates to a pressure-sensitive adhesive tape or sheet, and more particularly, to a pressure-sensitive adhesive tape or sheet used in external applications such as medicine and cleaning fields. [0002] The present invention also relates to a medical pressure-sensitive adhesive tape or sheet using a base material having a high void ratio and being gentle to the skin, and a production method thereof, and further relates to reduction of production cost and excellent feeling of use by direct application of an emulsion-type adhesive A pressure-sensitive adhesive tape or sheet, and a production method thereof. Background technique [0003] As a pressure-sensitive adhesive tape or sheet for medical use, for example, a pressure-sensitive adhesive tape or sheet including a support and a pressure-sensitive adhesive layer disposed on one side of the support is known, and usually by applying the pressure-sensitive adhesive layer These press...

Claims

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Application Information

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IPC IPC(8): A61F13/02A61L15/00
Inventor 船越慈生古森研二笠原刚上田裕子畑中宏
Owner NITTO DENKO CORP
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