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Double-sided adhesive tape, double-sided adhesive tape for fixing automotive parts, and double-sided adhesive tape for fixing protective covers of head-up displays for vehicles

A double-sided adhesive tape, double-sided technology, applied in film/sheet-like adhesives, adhesives, chemical instruments and methods, etc., can solve problems such as part peeling, and achieve excellent rebound resistance.

Active Publication Date: 2022-06-28
SEKISUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a double-sided pressure-sensitive adhesive tape using a conventional foam sheet as a base material is used to fix protective covers for automotive components such as automotive panels and automotive head-up displays in recent years, the parts may often be peeled off.
In particular, there is a problem of part peeling when using thin double-sided adhesive tape

Method used

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  • Double-sided adhesive tape, double-sided adhesive tape for fixing automotive parts, and double-sided adhesive tape for fixing protective covers of head-up displays for vehicles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] (1) Preparation of polyolefin foam

[0113] Made of polypropylene-based resin (ethylene-propylene random copolymer: manufactured by Sumitomo Chemical Co., Ltd., trade name "AD571", density 0.90 g / cm 3 , MFR0.5g / 10min) 80 parts by weight and linear low-density polyethylene (manufactured by Tosoh Corporation, trade name "ZF231", MFR2g / 10min, density 0.917g / cm 3 ) In the resin component composed of 20 parts by weight, add 7.5 parts by weight of azodicarbonamide (pyrolysis type foaming agent) and 3 parts by weight of divinylbenzene (crosslinking aid), and then add 2,6-di-tertiary 0.3 parts by weight of butyl p-cresol (antioxidant), 0.3 part by weight of dilauryl thiopropionate (antioxidant), and 0.5 part by weight of methylbenzotriazole (metal deactivator), the obtained polyolefin The resin composition was melt-kneaded at a temperature of 185° C. with a uniaxial extruder, and extruded into a raw material sheet having a thickness of 600 μm.

[0114] Next, the above-mention...

Embodiment 2

[0122] A polyolefin foam was obtained in the same manner as in Example 1, except that azodicarbonamide (pyrolysis-type foaming agent) was changed to 7 parts by weight.

[0123] A double-sided pressure-sensitive adhesive tape was obtained in the same manner as in Example 1, except that the obtained polyolefin foam was used.

Embodiment 3

[0125] Polypropylene resin (ethylene-propylene random copolymer: manufactured by Sumitomo Chemical Co., Ltd., trade name "AD571", density 0.90 g / cm 3 , MFR 0.5g / 10min) was changed to 70 parts by weight, linear low-density polyethylene (manufactured by Tosoh Corporation, trade name "ZF231", MFR2g / 10min, density 0.917g / cm 3 ) was changed to 30 parts by weight, and the azodicarbonamide (pyrolysis-type foaming agent) was changed to 7 parts by weight, and a polyolefin foam was obtained in the same manner as in Example 1.

[0126] A double-sided pressure-sensitive adhesive tape was obtained in the same manner as in Example 1, except that the obtained polyolefin foam was used.

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Abstract

The object of the present invention is to provide a double-sided adhesive tape that is excellent in heat resistance and resilience resistance, and is not easy to peel off even when fixing a vehicle-mounted panel or a protective cover of a vehicle-mounted head-up display; Double-sided adhesive tape for fixing vehicle parts and double-sided adhesive tape for fixing protective cover of head-up display for vehicle. The present invention is a double-sided adhesive tape having an acrylic adhesive layer on both sides of a substrate, wherein the substrate is made of a foam, and the substrate has a thickness of 1500μm or less, the crystal melting temperature peak of the above-mentioned foam measured by a differential scanning calorimeter is above 140°C, and the expansion ratio is 15cm 3 / g or less, the aspect ratio of the cells (average cell diameter in MD / average cell diameter in TD) is 0.9 to 3.

Description

technical field [0001] The present invention relates to a double-sided adhesive tape which is excellent in heat resistance and resilience resistance, and is not easily peeled off even when an in-vehicle panel or a protective cover of an in-vehicle head-up display is fixed, and an in-vehicle adhesive tape composed of the double-sided adhesive tape. Double-sided adhesive tape for fixing components, and double-sided adhesive tape for fixing protective covers of head-up displays for vehicles. Background technique [0002] Double-sided adhesive tapes are used for fixing in-vehicle components in vehicles such as automobiles to the vehicle body. In this type of vehicle-mounted component fixing application, the fixing arrangement of the components and the design of the device body are studied so that the components will not fall off or be damaged even if an impact is applied. As a double-sided adhesive tape for fixing in-vehicle components, a double-sided adhesive tape that does no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/24C09J7/38B32B27/00C08J9/04C09J133/00C09J7/26
CPCB32B27/00C08J9/04C09J133/00C09J7/26C09J2433/00C09J2423/106C09J2423/046C09J2301/124C09J2301/414C09J7/243C09J7/20C09J2400/243C09J2301/312
Inventor 片冈宽幸内田德之
Owner SEKISUI CHEM CO LTD