Chipboard for containing flaky electronic unit

A technology of electronic components and cardboard, applied to paper, papermaking, paper coating, etc., can solve problems such as insufficient burr prevention effect and inability to solve burr obstacles, and achieve excellent bonding stability

Active Publication Date: 2008-11-26
OJI PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned methods are not sufficient in preventing the burrs, and cannot solve the obstacle caused by the burrs generated in the square hole.

Method used

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  • Chipboard for containing flaky electronic unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and 2

[0069] In Examples 1 and 2, different pulps were used to form the surface layer, middle layer, and back layer of the paper base material. That is, for the surface layer, LBKP 100% was beaten to prepare pulp with a Canadian standard freeness of 400 ml. At this time, the L1 / L2 ratio=0.34. In the middle layer, mix and beat according to the ratio of NBKP20% and LBKP80%, and prepare the pulp with Canadian international standard freeness of 350ml. Sulfuric acid tape was added to each pulp slurry to adjust pH to 6.0, and 0.3% of polyacrylamide (Polysteron-1250 manufactured by Arakawa Chemical Co., Ltd.) was added as an internal paper strength enhancer. The above-mentioned various pulp slurries are supplied to the short-wire paper machine, and the quantitative adjustment is made into a surface layer: 100g / m 2 , middle layer: 200g / m 2 , inner layer: 50g / m 2 , papermaking is carried out by papermaking method, and the obtained 3-layer base paper is smoothed by a calender installed in...

Embodiment 3

[0079] Same as Examples 1-2, the production weight is 350g / m 2 , Thickness 0.42mm sheet-type electronic components storage cardboard. However, in the surface treatment agent coating liquid, polyacrylamide (Arakawa Chemical Co., Polymaset-512 (trademark), molecular weight: 200,000) and styrene-maleic acid copolymer resin (Arakawa Chemical Co., Ltd. Polymaron-382 (trademark)), the surface treatment agent coating solution was adjusted at a temperature of 60°C, a surface treatment agent concentration of 4.8%, and a viscosity of 7 mPa·s, and coated on the base paper. At this time, the coating amount is polyacrylamide solid content: 0.92g / m 2 , Styrene-maleic acid copolymer resin solid content: 0.04g / m 2 . The penetration depth of the surface treatment agent at this time (measurement method (2) of penetration depth) was 77 μm. 2% fluorescent dye (Kayahor PBS Liquid (trademark) manufactured by Nippon Kayaku Co., Ltd.) was mixed with the same surface treatment agent coating soluti...

Embodiment 4

[0081] Cardboard for storing sheet-shaped electronic components was produced in the same manner as in Example 3. However, an olefin-maleic acid copolymer resin (manufactured by Arakawa Chemical Co., Ltd., Polymaron-482 (trademark)) was used instead of a styrene-maleic acid copolymer resin as a surface treatment agent coating liquid component, and the surface treatment agent was applied Liquid: 60° C., surface treatment agent concentration: 46%, viscosity: 7 mPa·s coating liquid. At this time, the coating amount is 0.89g / m for polyacrylamide 2 , for olefin-maleic acid resin is 0.04g / m 2 . The penetration depth of the surface treatment agent at this time (measurement method (2) of penetration depth) was 72 μm. 2% fluorescent dye (manufactured by Nippon Kayaku Co., Ltd., Kayahor PBS Liquid (trademark)) was mixed with the same surface treatment agent coating liquid as above, and the penetration depth was measured by fluorescence color development. The measured value of the pene...

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Abstract

The invention provides a storage hard paperboard of a sheet electronic part, which restrains the burr formed in the inner of the cove in a plurality of sheet part for storage in the paper basis material for storing hard paperboard, and no or few burrs are generated when stripping the cover for covering the cove. On the surface of the paper basis material, the surface treating agent coated in the fiber coating amount smaller than 1.1 g / m<2> is adjusted to smaller than 10 mPs.s, causing the depth of the coated surface treating agent to sink from the surface at the open side of the cove on the basis material to the inner for exceeding 50 mum, and the average roughness height of the surface of the basis material is adjusted to more than 3 mum.

Description

technical field [0001] The present invention relates to a cardboard for storing sheet-shaped electronic components. More specifically, the present invention relates to a cardboard for storing sheet-shaped electronic components with less generation of burrs and excellent formability. [0002] The cardboard paper for storing sheet-shaped electronic components of the present invention has excellent adhesion stability to the cover tape, and when the cover tape is peeled off, no burrs come off the cardboard paper or very few burrs come off. Background technique [0003] Cardboard for storing sheet-type electronic components is usually processed as follows with cardboard sheets for the cardboard to form a carrier for sheet-type electronic components. [0004] (1) A cardboard sheet for cardboard is cut into strips having a predetermined width. [0005] (2) Forming square holes (recesses or through holes) and round holes (through holes) of a predetermined size on the formed cardboa...

Claims

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Application Information

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IPC IPC(8): B65D73/00B65D85/86B65D65/40B32B29/00D21H27/30D21H19/12D21H15/02
CPCY02W90/10B32B27/10B65D65/40B65D85/30B65D2585/86
Inventor 奥谷岳人末永浩
Owner OJI PAPER CO LTD
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