Provided herein is a two-component thermally-conductive epoxy adhesive.

A polyolefin adhesive film includes a support base layer and a bonding adhesive layer formed on the support base layer. The support base layer is a polypropylene film. The bonding adhesive layer includes: a polyolefin copolymer and inorganic particles dispersed in the polyolefin copolymer. The polyolefin copolymer is modified by maleic anhydride, and the inorganic particles are modified by epoxy siloxane. A graft ratio of the maleic anhydride modified on the polyolefin copolymer ranges from 1% to 5%. A weight ratio of the epoxy siloxane modified on the inorganic particles ranges from 0.3% to 4%. When the polyolefin adhesive film undergoes a heating operation, the epoxy siloxane modified on the inorganic particles and the maleic anhydride modified on the polyolefin copolymer undergo a cross-linking reaction, so that a hardness of the bonding adhesive layer is increased.

Provided herein is a tape roll configured to include an adhesive associated with a color-changing dye to provide the user with a visible marker for the end of the tape roll. In certain aspects, the adhesive is associated with a redox indicator. In certain aspects, the redox indicator is activated upon exposure to air.

One-component toughened epoxy structural adhesives contain fibrous mineral fillers that have an aspect ratio of 6. The presence of the fibrous filler leads to a significant increase in elastic modulus while having little if any adverse effect on other properties such as dynamic impact peel resistance.