Polyolefin porous material, foam layer containing polyolefin porous material and adhesive tape containing polyolefin porous material

A porous material and polyolefin technology, applied in the direction of adhesives, film/sheet adhesives, etc., can solve the problems of heavy overall weight, inconvenient operation, and insufficient impact resistance, and achieve moderate softness and hardness, stable and reliable use , excellent waterproof performance

Pending Publication Date: 2021-04-16
LOHMANN ADHESIVE TAPE TECH TIANJIN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with plastic, 3D glass has a heavier overall weight, coupled with the continuous stress of 3D curved surface, it makes bonding more difficult, which also puts forward higher requirements for adhesive tape.
[0004] Due to its low cohesive strength and insufficient impact resistance, the traditional foam tape is prone to foam tearing in the heavy machine drop test, and due to the poor bending resistance of the glue, it is difficult to bond for a while After that, there will be a phenomenon of glue opening
[0005] The existing technology usually uses acrylic foam tape for bonding. This tape has strong bonding performance and is soft and easy to attach. However, because it is too soft, the die-cutting scrap rate remains high, and it is not easy to operate in the actual assembly process. , resulting in low efficiency of the industrial chain

Method used

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  • Polyolefin porous material, foam layer containing polyolefin porous material and adhesive tape containing polyolefin porous material
  • Polyolefin porous material, foam layer containing polyolefin porous material and adhesive tape containing polyolefin porous material
  • Polyolefin porous material, foam layer containing polyolefin porous material and adhesive tape containing polyolefin porous material

Examples

Experimental program
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preparation example Construction

[0046] The raw materials for the preparation of polyolefin porous materials include vinyl thermoplastic elastomers, low-density polyethylene, foaming agents, antioxidants, sensitizers and color masterbatches, of which vinyl thermoplastic elastomers, low-density polyethylene, foaming agents, The mass ratio of antioxidant, sensitizer and color masterbatch is 15~60:5~60:2~7:0.01~2:0.01~2:0.2~10, the color of polyolefin porous material is black or gray or white .

[0047] Blowing agent comprises physical blowing agent and chemical blowing agent, and wherein physical blowing agent comprises one or two in nitrogen, carbon dioxide, butane or expanded microspheres, or two or more; Preferred nitrogen or carbon dioxide, use physical blowing agent Foaming agent is produced by extrusion or molded foaming process;

[0048] Chemical blowing agents include azodicarbonamide, 2,2,2'-azobisisobutyronitrile, diisopropyl azodicarboxylate, barium azodicarboxylate, diethyl azodicarboxylate, azo A...

Embodiment 1

[0067] The mass ratio of vinyl thermoplastic elastomer, low density polyethylene, foaming agent, antioxidant, sensitizer and masterbatch is 38.2:52:4.2:0.2:0.4:5; the apparent density is 0.69g / cm 3 , the thickness is 0.17mm, the degree of crosslinking is 42%; the closed cell rate is 89%, the tensile strength MD is 42.2N / 15mm, and the CD is 29.4N / 15mm; the elongation MD is 462.4%, and the CD is 504.1%.

[0068] Such as Figure 2-Figure 6 As shown, in combination with the specific values ​​of Example 1, the various data of the tape before improvement and the tape after improvement are compared through the experimental data table.

[0069] Note: if Figure 4 As shown, the bending test characterizes the warping height of the adherend after adhesion failure within a certain period of time. The smaller the value, the better the performance of the tape.

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Abstract

The invention provides a polyolefin porous material, a foam layer containing the polyolefin porous material and an adhesive tape containing the polyolefin porous material, the polyolefin porous material comprises a foam layer, an upper adhesive layer, a lower adhesive layer and a release protection layer, the upper adhesive layer is arranged above the foam layer, the lower adhesive layer is arranged below the foam layer, the release protection layer is arranged above the upper adhesive layer, the foam layer is subjected to surface treatment, and the thickness ranges of the upper adhesive layer and the lower adhesive layer are both 0.01-0.1 mm. According to the polyolefin porous material and the foam layer containing the polyolefin porous material, the adhesive tape is a double-sided foam adhesive tape with high strength, impact resistance, high binding power and high aging resistance, and has excellent damp-proof and waterproof performance.

Description

technical field [0001] The invention belongs to the technical field of adhesive tapes, and in particular relates to a polyolefin porous material, a foam layer containing the material, and an adhesive tape. Background technique [0002] After several years of technological innovation in consumer electronics products such as smartphones, the upgrade space for hardware configurations has been shrinking, and there has been a lack of "unique" differences that can attract consumers to buy. Since the specifications installed in mobile phones are similar, smart mobile phone manufacturers have to use their brains Moving to the design of the mobile phone. Plastic, metal and glass are currently the three most widely used materials in mobile phones. However, 5G communication uses wireless spectrum above 3GHz. The antenna structure of smartphones will be more complicated than that of 4G. The existing antenna layout structure cannot meet the needs of 5G. The shielding of metal casings ha...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08K5/134C08K3/22C08J9/12C08J9/06C08J9/00C09J7/26
Inventor 李增勇魏琼韦强段建平王立伟孙峰杰张燕陈珍珍朱擎文
Owner LOHMANN ADHESIVE TAPE TECH TIANJIN
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