Unlock instant, AI-driven research and patent intelligence for your innovation.

Removable contact-adhesive tape

A technology of pressure-sensitive tapes and pressure-sensitive adhesives, applied in the direction of pressure-sensitive films/sheets, adhesives, film/sheet-like adhesives, etc.

Active Publication Date: 2019-11-29
TESA SE
View PDF52 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, mobile devices are also subject to a greater degree of load due to humidity influences, temperature influences, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Removable contact-adhesive tape
  • Removable contact-adhesive tape
  • Removable contact-adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0265] In an alternative preparation method, all components of the adhesive are dissolved in a solvent mixture (petrol / toluene / acetone). The microspheres are foamed in gasoline and introduced into the dissolved adhesive. Once the microspheres are evenly distributed in the solution, the adhesive can be applied, for example by doctor blade on a conventional PET liner.

[0266] In a first step, the coated adhesive was exposed to 100° C. for 15 minutes to dry. After drying, the adhesive layer was covered with a second PET liner and foamed in an oven at 150° C. for 5 minutes, in particular covered between the two liners to produce a particularly smooth surface.

[0267] The surface thus produced has a roughness R of less than 15 μm, more preferably less than 10 μm a .

[0268] Surface roughness R a is an industry standard unit for the quality of a surface finish and expresses the mean height of roughness, specifically the mean absolute distance from the centerline of the roughn...

Embodiment 1 to 3

[0281]

[0282]

[0283] The composition of the adhesive:

[0284] Kraton 1102 Styrene-butadiene-styrene-block copolymer from Kraton Polymers, 83% by weight 3-block, 17% by weight 2-block; block polystyrene content: 30% by weight %

[0285] Dercolyte 115 solid α-pinene tackifying resin with a ring and ball softening temperature of 115°C and a DACP of 35°C

[0286] ●Wingtack 10 liquid hydrocarbon resin from Cray Valley Company

[0287] ●Expancel 920 DU20 microspheres

[0288] The aging inhibitors used include in particular Irganox 1010 (phenolic antioxidant).

[0289] comparative example Example 1 Example 2 Example 3 thickness [μm] 109 107 103 109 density [g / cm 3 ]

1 0.752 0.593 0.50 Microspheres [weight%] 1.5 2.5 3.5 Bond Strength, Steel [N / cm] 9 10.0 8.5 8.0 Bond strength, PE [N / cm] 7 6.9 6.7 6.2 Falling Ball, (13.8g) [cm] 50 225 >245 Falling Ball, (32.6g) [cm] -- 1...

Embodiment 4 to 7

[0296]

[0297]

[0298]

[0299]

[0300] Examples 4 to 7 show the effect of increased microsphere content in the adhesive compared to the unfoamed adhesive.

[0301] result:

[0302] ● Even at a microsphere content of 0.5% by weight, a clear improvement in impact resistance (falling balls) was measured

[0303] ●The impact resistance increases with the increase of microsphere content

[0304] ●Peel force decreased with the increase of microsphere content.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
softening pointaaaaaaaaaa
densityaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a contact-adhesive tape which can be removed damage-free and residue-free by stretching the tape substantially within the adhesion plane and which consists of one or more adhesive substance layers, all made of a contact-adhesive substance expanded with micro-balloons, and one or two optional intermediate backings. The disclosed contact-adhesive tape consists exclusively ofthe aforementioned adhesive substance layers and optional intermediate backings, and the one external upper surface as well as the one external lower surface of the contact-adhesive tape are formed by said adhesive substance layer or layers.

Description

[0001] This application is based on a divisional application of a patent application with an application date of March 29, 2016, an application number of 201680029100.4, and an invention title of "Repeelable Pressure-Sensitive Adhesive Tape". technical field [0002] The present invention relates to tear-resistant pressure-sensitive adhesive tapes (pressure-sensitive adhesive strips) based on vinyl block copolymers, which can be used to produce adhesives which can be separated (peeled) again by elongated stretching in the direction of the bonding plane. Knot. Background technique [0003] Elastically or plastically highly stretchable self-adhesive tapes which can be peeled off again without residue and without damage by elongation in the bonding plane are described, for example, by US 4,024,312 A, DE 33 31 016 C2, WO 92 / 11332 A1, WO92 / 11333 A1, DE 42 22 849 C1, WO 95 / 06691 A1, DE 195 31 696 A1, DE 196 26 870 A1, DE 196 49 727 A1, DE 196 49 728 A1, DE 196 49 729 A1, DE 197 0...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/38C09J7/10C09J7/22C09J153/02C09J11/08C09J11/04
CPCC09J153/02C08L2205/03C09J2203/318C09J2203/33C09J2203/322C09J2453/00C09J2425/00C09J2409/00C09J7/38C09J7/22C09J7/10C09J11/08C09J11/04C08K7/22C09J2301/208C09J2301/308C09J2301/124C09J2301/412C09J2301/408C09J2301/302C08L45/00C08L101/00B29B7/485B29B7/845B29B7/487B29B7/748B29B7/7461B29B7/52B29C48/0011B29C48/154B29C48/385B29C48/44B29C48/765B29C48/92B29C2948/92704B29C43/24B29C43/28B29B7/426
Inventor A.布拉泽朱斯基A.伯梅斯特F.洛曼A.彼得森
Owner TESA SE