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Pressure-sensitive adhesive sheet for application to skin and first-aid plaster

A technology of pressure-sensitive adhesive tape and pressure-sensitive adhesive layer, which is applied in applications, bandages, medical devices, etc., and can solve the problems of pressure-sensitive tape rupture, easy peeling, and insufficient mechanical strength of the substrate film.

Inactive Publication Date: 2005-02-02
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical strength of the thus obtained substrate film is insufficient
In particular, this film has the disadvantage that when many through holes having a diameter of about 1 mm are formed in this pressure-sensitive adhesive tape in order to ease the wetting of the skin during wearing of the pressure-sensitive adhesive tape, then there is Cases where pressure sensitive tape breaks when the tape is peeled off the skin
As a result, the pressure-sensitive tape obtained with this film shrinks or curls due to residual stress, and winding this pressure-sensitive tape onto a roll suffers from problems such as so-called tension, stretching, etc.
[0011] In addition, since known films made of ethylene / vinyl acetate copolymers have poor surface slipperiness, they have a disadvantage that when they are used as backing films for pressure-sensitive adhesive tapes suitable for skin or as When sticking the backing film of the plaster, the tape or plaster is easy to peel off when it rubs against the clothes
However, when the obtained film is used as a backing film for pressure-sensitive tapes applied to the skin, the film is particularly sensitive to so-called curling, i.e., the film is prone to curling due to the stress generated when the release paper is removed from the pressure-sensitive tape. curly
Therefore, there have been certain problems, for example, it is difficult to apply pressure-sensitive tape to the skin, and sometimes it cannot be applied to close contact with the skin

Method used

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  • Pressure-sensitive adhesive sheet for application to skin and first-aid plaster

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] (Preparation of film by calendering and evaluation of calendering properties)

[0063] The resin composition having the composition shown in Table 1 was formed into a film having a thickness of 100 μm using a two-roll mill with a surface temperature of 170° C. During this process, the resin composition was tested for calendering properties based on peelability and haul-off. That is, in terms of peelability, A indicates the case where the resin composition can be easily released from the roll when the film is peeled off from the roll, and B indicates the case where the resin is difficult to release from the roll. In terms of traction property, A indicates the case where the film can be drawn without any problem when peeled off the roll, and B indicates the case where the film sags or breaks when peeled off the roll.

[0064] (preparation of substrate film and evaluation of anti-adhesion)

[0065] Subsequently, a resin composition having calendering properties (evaluate...

Embodiment 2-8

[0083] The calendering properties of the resin compositions were examined in the same manner as in Example 1, except that each of the resin compositions shown in Table 1 was used. Thereafter, each resin composition was formed into a film having a thickness of 70 μm by calendering. The adhesiveness of the obtained film was examined by the same method as in Example 1. The results are shown in Table 1.

[0084] In the same manner as in Example 1, the film thus obtained was used as a substrate film for preparing a pressure-sensitive adhesive tape. The 10% modulus, wearing feeling, dynamic friction coefficient, surface slipperiness, curl sensitivity and peel strength of the pressure-sensitive adhesive tape thus obtained were examined. The results are shown in Table 1.

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PUM

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Abstract

A pressure-sensitive adhesive sheet for application to the skin which employs a substrate film made of a chlorine-free material is provided as a substitute for the substrate film made of a flexible vinyl chloride resin. A pressure-sensitive adhesive sheet for application to the skin, which comprises (1) a substrate film comprising a resin composition comprising from 20 to 80% by weight of an ethylene / vinyl acetate copolymer having a weight-average molecular weight higher than 1x10<5 >and not higher than 1x10<6>, a melt flow rate of 1.0 g / 10 min or lower, and a vinyl acetate content higher than 28% by weight and not higher than 35% by weight and from 80 to 20% by weight of at least one polyolefin resin selected from the group consisting of polyethylene, polypropylene, ethylene / propylene copolymers, and mixtures thereof and having a melt flow rate in the range of from 0.3 to 4.0 g / 10 min and, (2) a pressure-sensitive adhesive layer for application to the skin.

Description

technical field [0001] The present invention relates to a pressure-sensitive adhesive tape applied to the skin and to uses of the pressure-sensitive adhesive tape, wherein the pressure-sensitive adhesive tape comprises a substrate film comprising a resin composition and a pressure-sensitive adhesive layer formed on the substrate film, wherein the resin The composition includes ethylene / vinyl acetate copolymer and polyolefin resin. More particularly, the present invention relates to a pressure-sensitive adhesive tape for skin application, which has all the important properties required for a pressure-sensitive adhesive tape for skin application, for example, the following properties: flexible and conforms well during wearing skin to produce a good feeling (wearing feeling); has practically sufficient strength despite being flexible; has excellent surface slip properties (slip property) so that during wearing, it does not peel off when rubbed against clothes, etc.; The stress t...

Claims

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Application Information

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IPC IPC(8): A61F13/02A61L15/58A61M35/00C08F210/02C08F210/06
CPCA61L15/585C08L29/04A61F13/02A61F13/0246A61F2013/00102
Inventor 国谷正善铃木清志佐佐木康行
Owner NITTO DENKO CORP
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