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Material for preparing long-life salt-fog test equipment box body and preparation method thereof

A salt spray test and long-life technology, which is applied in the field of plastic box manufacturing, can solve problems such as failure and thermal stress fatigue, and achieve the effects of long cycle, no hidden danger of leakage, and superior resistance to salt spray and corrosion

Active Publication Date: 2014-03-05
WENZHOU JINTONG COMPLETE SET ELECTRICAL APPLIANCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of box board made of thermoplastics will cause early thermal stress fatigue and failure under repeated impacts of long-term temperature changes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take the batching of following parts by weight:

[0025] Novolac epoxy vinyl ester resin 100 parts

[0026] Mineral filler 150~230 parts

[0027] Initiator 0.8~1.5 parts

[0028] Release agent 0.5~1.5 parts

[0029] Thickener 0.8~1.4 parts

[0030] Process additive 1.8~2.5 parts

[0031] Salt spray resistant nano-additive 8-12 parts

[0032] Alkali-free chopped glass fiber 15-20% of the total amount of mixture. Wherein the mineral filler can be calcium carbonate or talcum powder or kaolin, the thickener can be calcium hydroxide or magnesium oxide, and the corresponding materials available in the market are used for the initiator, the release agent, and the salt-spray-resistant nano-additive.

[0033] The preparation method of the long-life salt spray test equipment box is as follows: first mix the powder materials in the above ingredients in a V-shaped dry powder mixer for 6-8 minutes, and then transfer them to a Sigama kneader;

[0034] Then put the liquid compo...

Embodiment 2

[0039] In this example, the mineral filler is heavy calcium carbonate obtained by mixing calcium carbonate powders with particle sizes of 350 mesh, 800 mesh, and 1200 mesh at a ratio of 1:0.6:0.3. The mineral filler adopts a gradation of different particle diameters. It is of great benefit to improve the compactness and apparent quality of the product. The initiator is tert-butyl peroxybenzoate (TBPB). The release agent is zinc stearate.

[0040] The thickener of this embodiment is calcium hydroxide, adding the thickener is to hope that the viscoelastic body that has been fully mixed through the kneader can basically maintain its homogeneous and homogeneous state without phase separation, let alone There is liquid resin precipitation, and it is hoped that the premixed material can flow with the glass fiber during the molding flow and fill all parts of the cavity. When the temperature is low, magnesium oxide MgO can be used to achieve the purpose of rapid thickening.

[0041...

Embodiment 3

[0047] In this example, the process additive is BYK-P9050, which has a mold release function and reduces haze.

[0048] The salt-spray-resistant nano-additive in this example is a ZT-719 additive refined from a variety of nano-materials using special technology. 2.2~2.4 g / cm3, water content ≤0.3%, oil absorption (g / 100g) ≤20%, ignition loss ≤0.5%. E-chopped glass fiber length is 6mm, diameter 13μ.

[0049] Select 10kg (100 parts) MFE757 novolac epoxy vinyl ester resin, 15kg (150 parts) mixed calcium carbonate, 150g (1.5 parts) TBPB, 80g (0.8 parts) calcium hydroxide, 180g (1.8 parts) BYK-P9050 , 80g (8 parts) ZT-719 and 4.5kg chopped glass fiber, set aside.

[0050] Mix the powder materials in the above ingredients in a V-shaped dry powder mixer for 6-8 minutes, and then transfer them to the Sigama kneader;

[0051] Then put the liquid components in the ingredients into the mixing barrel of the high-speed beater, stir vigorously for 10-16 minutes and then pour them into th...

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Abstract

The invention provides a material for preparing a long-life salt-fog test equipment box body. The material is characterized by comprising the following materials in parts by weight: 100 parts of phenolic aldehyde epoxy vinyl ester resin, 150-230 parts of mineral fillers, 0.8-1.5 parts of initiating agents, 0.5-1.5 parts of mould release agents, 0.8-1.4 parts of thickening agents, 1.8-2.5 parts of process auxiliary agents, 8-12 parts of salt-fog resistant nanometer additives and alkali-free chopped glass fibers which account for 15%-20% of the total amount of the mixture. The box body material provided by the invention has superior salt-fog resistant capacity and corrosion resistant capacity, thereby being capable of substituting for imported PVC (Polyvinyl Chloride) and PP (Polypropylene) plates; the box body material provided by the invention ensures that the equipment box body is sealed without being leaked by being formed through compression for one time.

Description

technical field [0001] The invention relates to the field of plastic box manufacturing, in particular to a material for preparing a long-life salt spray test equipment box and a method for preparing the box. Background technique [0002] At present, the box body of the general salt spray test equipment is mostly made of imported hard polyvinyl chloride (PVC), polypropylene (PP), synthetic carbonic acid (PC) and other plastic plates, which are molded at high temperature, and then planed, milled, and ground. , and finally welded at high temperature, the general tolerance temperature is around 70 ℃. This kind of boxboard made of thermoplastics will fail due to early thermal stress fatigue under the repeated impact of long-term temperature changes. Ordinary thermosetting plastics can work at a long-term high temperature of 120°C on average. If the material is specially modified and selected, it can not only improve the corrosion resistance in the salt spray environment, but als...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K13/04C08K7/14C08K3/26C08K5/098C08K3/22B29B7/00
Inventor 施炳飞
Owner WENZHOU JINTONG COMPLETE SET ELECTRICAL APPLIANCES
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