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Polyvinyl butyral sheet material

A polyvinyl butyral and sheet technology, which is applied in the field of polyvinyl butyral sheet, can solve the problems of unstable adhesive strength of film, affecting the quality of safety glass lamination effect, etc. The effect of efficient recycling

Inactive Publication Date: 2009-08-26
浙江凯尚纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A better treatment method is to use leftover materials to reproduce PVB sheets, but if some or all of the leftover materials are used to produce PVB sheets, the bonding strength of the produced films will be unstable, which will directly affect the lamination effect and safety glass production process. Quality of laminated safety glass

Method used

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  • Polyvinyl butyral sheet material
  • Polyvinyl butyral sheet material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Prepare raw materials according to the following ratio:

[0012] 1000kg PVB film scraps; 180g citric acid; 1kg antioxidant B-900; 1kg ultraviolet absorber UV-327; 10g fluorescent whitening agent OB-1.

[0013] According to the above formula, crush the weighed leftovers into granules, put them into a multi-angle variable pitch cone mixer, add citric acid into a 10% water-soluble slurry, and add antioxidant B-900, ultraviolet absorber UV -327. Fluorescent whitening agent OB is added to the mixer. The mixer jacket is cooled with cooling water below 20°C. After mixing the mixture for 15 minutes, put it into a single-screw extruder for melt extrusion, and control the melt temperature at 160-165°C; the melt is filtered and sent into the die head with a gear pump, and the gap between the lips of the die head and the die head are adjusted. The pulling speed of the cooling roller is such that the thickness of the PVB film is 0.76mm.

[0014] The prepared product was tested, a...

Embodiment 2～5

[0016] Carry out batching according to the data of table 1, make PVB sheet according to the technique described in embodiment 1

[0017] Table 1

[0018]

[0019] Its test results of the PVB sheet produced according to the formula of Examples 2 to 5 are as shown in Table 2, and fully meet the national standard requirements:

[0020] Table 2

[0021] Example Transmittance Haze tap value 2 89.3％ 0.33％ 7 3 89.2％ 0.33％ 6 4 89.2％ 0.32％ 7 5 89.3％ 0.33％ 6

Embodiment 6

[0023] Prepare raw materials according to the following ratio:

[0024] 700kg PVB film scraps; 225kg PVB resin; 75kg plasticizer 3GO; 100g citric acid; 1kg antioxidant B-900; 1kg ultraviolet absorber UV-327; 10g fluorescent whitening agent OB.

[0025] According to the above formula, crush the weighed leftovers into granules, put them into a multi-angle variable-pitch cone mixer, and add PVB resin, citric acid to make a 10% water-soluble slurry, and add antioxidant B-900 , UV absorber UV-327, fluorescent whitening agent OB dissolved in plasticizer 3GO and added to the mixer. The mixer jacket is cooled with cooling water below 20°C. After mixing the mixture for 15 minutes, put it into a single-screw extruder for melt extrusion, and control the melt temperature at 160-165°C; the melt is filtered and sent into the die head with a gear pump, and the gap between the lips of the die head and the die head are adjusted. The pulling speed of the cooling roller is such that the thickn...

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Abstract

A polyvinyl butyral sheet is provided, which is calculated by weight. The raw materials preparing the sheet basically consist of the following components: 300 to 1000 polyvinyl butyral film rim leftover; 0.04 to 0.2 organic acid with boiling point over 200 DEG C.; 0.5 to 2 antioxidant; ultra-violet absorber 0.5 to 2; 0.005 to 0.015 optical brightener. 200 to 600 PVB resins are added in the raw material preparing the sheet and 60 to 180 plasticizers additionally. Adding organic acid with high boiling point as bond strength regulator realizes highly efficient recovery and reuse of the reproduction PVB sheet of the PVB film rim leftover and realizes that the produced PVB sheet completely conforms to the quality requirement.

Description

(1) Technical field [0001] The invention relates to a polyvinyl butyral sheet (2) Background technology [0002] Polyvinyl butyral (PVB) film is an interlayer material for making safety glass. Offcuts are produced during the production of the film and during the manufacture of safety glass from the film. In the known technology, the processing methods of these scraps are: 1. incineration or landfill, 2. making shoe sole material, 3. making carpet lining glue, 4. making adhesive, 5. making paint. Wherein method 1. is obviously not good enough, although method 2., 3., 4., 5. have also utilized the leftover material of PVB film, utilization value is not high. The excellent light transmission performance of PVB film has not been utilized, so the added value of the product is not high. A better treatment method is to use leftover materials to reproduce PVB sheets, but if some or all of the leftover materials are used to produce PVB sheets, the bonding strength of the produced ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/14C08K5/09C08J5/18
Inventor 安永锋尹学毅安传清齐冬明
Owner 浙江凯尚纳米科技有限公司