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Double-sided adhesive tape

A tape, double-sided technology, applied in the direction of adhesives, adhesive types, ester copolymer adhesives, etc., can solve problems such as paste residue, achieve firm bonding, strong adhesion, easy recycling or reuse Effect

Active Publication Date: 2013-11-13
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if an adhesive with low impregnability is used for these adhesive tapes, when the adhesive tape is peeled off again, paste residue due to peeling off of the adhesive layer may occur.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0151] (1) Preparation of non-woven substrate

[0152] A solution containing 100% Manila hemp and 0.5% polyamidoamine epichlorohydrin resin is used to make paper with a weight of 17g / m2 on an inclined short-wire paper machine 2 , Density 0.27g / cm 3 , and a nonwoven fabric substrate having a tensile strength of 27.3 N / 20 mm in the MD direction and 25.8 N / 20 mm in the TD direction was obtained.

[0153] (2) Synthesis of acrylic copolymer fixed to non-woven fabric

[0154] 280 parts of ion-exchanged water was put into the polymerization container equipped with the stirring apparatus, and stirring was carried out sending nitrogen gas, and the temperature inside the reaction container was raised to 80 degreeC. After the temperature was raised, 6 parts of monomer emulsion (1A) having the following composition was added to the reaction container, and then 6 parts of ammonium persulfate and 6 parts of sodium bisulfite were added to initiate polymerization. After maintaining the tem...

Embodiment 2

[0182] A double-sided adhesive tape was prepared in the same manner as in Example 1 except that the acrylic copolymer to be fixed to the nonwoven fabric was an acrylic copolymer obtained in the following production examples.

[0183] 280 parts of ion-exchanged water were added to a polymerization vessel equipped with a stirring device, and the inside of the reaction vessel was heated up to 80° C. while stirring while feeding nitrogen gas. After the temperature was raised, 6 parts of monomer emulsion (1B) having the following composition was added to the reaction container, and then 6 parts of ammonium persulfate and 6 parts of sodium bisulfite were added to initiate polymerization. After maintaining the temperature in the reaction container at 60° C. for 10 minutes, 594 parts of the remaining monomer emulsion (1B) and the following aqueous polymerization initiator solution (2B) were added dropwise to the reaction container at the same time to perform polymerization. The dropwi...

Embodiment 3

[0199] A double-sided adhesive tape was prepared in the same manner as in Example 2 except that the amount of fixation of the acrylic copolymer to the nonwoven fabric base material was 1% with respect to the mass of the nonwoven fabric.

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Abstract

Disclosed is a double-sided adhesive tape including a nonwoven fabric substrate and an adhesive layer composed of an acrylic adhesive composition. The nonwoven fabric substrate is obtained by fixing an acrylic copolymer having a glass transition temperature of -10°C or lower to a nonwoven fabric having a tensile strength of 5 to 45N / 20 mm in both the MD direction and the TD direction. The adhesive layer has a storage modulus at a frequency of 1 Hz at 30°C of 6x10 4 to 1x10 5 Pa. This double-sided adhesive tape has strong adhesive force and excellent removability.

Description

technical field [0001] The present invention relates to a double-sided adhesive tape. In more detail, it relates to such a double-sided adhesive tape, which is firmly bonded to adherends such as plastics and metals, and when peeled off after long-term sticking, there is no so-called paste residue or damage as a result of no special treatment such as heating. Phenomenon of the non-woven fabric supporting the substrate. Background technique [0002] Double-sided adhesive tape has been used in various industrial fields such as OA equipment, home appliances, and automobiles as a joining means with excellent workability and high adhesion reliability. On the other hand, from the viewpoint of protecting the global environment, it is increasingly practiced that assembled products such as OA equipment are disassembled after use and recycled and reused. At this time, in the case where the parts are joined together by the double-sided adhesive tape, the operation of peeling off the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/04C09J133/04C09J133/08C09J7/21C09J7/38
CPCC09J2201/128C09J7/045C09J2400/263D06M15/263C09J2433/00C09J133/08C09J7/38C09J7/21Y10T442/2738C09J2301/124C09J133/04
Inventor 森野彰规加藤直树桥口恒则辻川敦子
Owner DIC CORP
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