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Ultra-thin resin foamed sheet as well as production method and application thereof

A foamed sheet material and a manufacturing method technology, which can be applied to other household appliances, applications, household appliances, etc., and can solve the problems of inability to meet the requirements of electronic products, poor sealing and cushioning properties, and large specific gravity.

Active Publication Date: 2015-05-13
广德祥源新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to stably process thin slices below 0.3mm during the slicing process, and it is even more difficult to ensure the uniformity of thickness of thin slices
Although the resin film can be thinned, there is a problem of high specificity, and the resin film has poor sealing and cushioning properties due to the lack of a porous structure of the bubble layer, which cannot meet the requirements of electronic products.

Method used

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  • Ultra-thin resin foamed sheet as well as production method and application thereof
  • Ultra-thin resin foamed sheet as well as production method and application thereof
  • Ultra-thin resin foamed sheet as well as production method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] An ultra-thin resin foam sheet, LDPE (melting temperature 95°C, MFR value 2.0g / min, Daqing Petrochemical 18D) and EAA (melting temperature 126°C, MFR value 6.0g / min, Dow 3150) As the basic resin, ethylene-propylene rubber (softening temperature 150°C, 3722P) is added as modified rubber; the total amount of resin is 100 parts by weight, of which LDPE accounts for 30 parts by weight, EAA accounts for 30 parts by weight, and the amount of modified rubber added is 40 parts by weight share.

[0038] In the above 100 parts by weight resin, add 4 parts by weight of blowing agent amine azodicarbonate, add 2.5 parts by weight of antioxidant 1010, 1.5 parts by weight of sensitizer zinc stearate, 4 parts by weight of lubricating Agent stearic acid, the pigment of 7 parts by weight.

[0039] The manufacturing method of the ultra-thin resin foam sheet, the specific steps are:

[0040] (1) The above raw materials are mixed and granulated, and the mixing and granulation is divided i...

Embodiment 2

[0047] The difference from Example 1 is that in order to produce a thinner foam, the thermoplastic elastomer used is a polymer whose hard phase is formed through the combination of metal ions to form crosslinking points, and the soft phase is mainly made of PE non-crystalline polymer. Due to the better fluidity of this type of elastomer, it is suitable for thinner foam substrates, and has a great improvement in tensile strength and elongation at break. Corresponding to 100 parts by weight of resin (LDPE:EAA:elastomer=3:2:5), the amount of blowing agent added is 2 parts by weight.

[0048] In order to obtain a thinner foam substrate, in the extruding process part, the opening of the selected T-shaped die is 0.15. And when extrusion is required, the sheet is heated and stretched on both sides, the heating temperature is 60-80°C, the longitudinal stretch ratio is 3.6, and the transverse stretch ratio is 2.0. The obtained foam substrate has a thickness of 0.12±0.005mm. Using the...

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Abstract

The invention discloses an ultra-thin resin foamed sheet as well as a production method and an application thereof. For the raw material, at least one of LLDPE (linear low density polyethylene), LDPE (low density polyethylene), MDPE (medium density polyethylene) and HDPE (high density polyethylene) is taken as the basic resin, an alkene thermoplastic elastomer or rubber is taken as a resin modifier, and the raw material further comprises a foaming agent and an antioxidant. The ultra-thin resin foamed sheet adopts a porous structure, the thickness is 0.04-0.3 mm, and the apparent density is 0.1-0.5 g / cm<3>; in the thickness direction, the ultra-thin resin foamed sheet comprises at least two bubbles and adopts a round or irregular oval structure. Compared with the conventional foamed sheet, the ultra-thin resin foamed material having irregular oval cellular structure as well as specific thickness and apparent density is thinner and lighter, is softer and lighter than a film material and is more suitable for thin and light sealing and cushioning materials or binding tape substrates of electronic equipment.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to an ultra-thin foamed resin sheet and its manufacturing method and application. Background technique [0002] Due to its light weight, thin thickness, smooth and delicate surface, uniformly closed cells, excellent heat and sound insulation performance, moisture-proof, and environmental protection, resin foam sheet has good physical properties and is easy for secondary processing. It is mainly used in sealing materials, cushioning materials, packaging materials, thermal insulation materials, floor mat materials, etc. [0003] In recent years, with the design of electronic devices such as smartphones, LCD TVs, and tablet computers becoming thinner and lighter, thinner and lighter components are also required. For this type of electronic equipment, the sealing and cushioning materials used are also required to be thinner and lighter, and they are expected to be thin-layer...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08L23/16C08K5/134C08K5/098C08J9/10B29D7/01B29B9/06B29C47/00B29C47/14B29C35/10B29C44/22B29C48/305
CPCB29D7/01C08J9/103C08J2203/04C08J2309/00C08J2323/16C08J2423/06C08J2423/08C08L9/00C08L23/16C08L2205/03C08L2205/14C08L2207/062C08L2207/066C08L23/06C08L23/0869C08K13/02C08K5/1345C08K5/098C08K5/09
Inventor 魏琼陈蓉
Owner 广德祥源新材科技有限公司
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