Material for hollow blow-molded micro-foamed tool box and preparation method thereof

A toolbox and micro-foaming technology, which is applied in the field of toolbox materials and its preparation, can solve the problem of difficult control of the wall thickness of blow molding toolboxes, poor transverse tensile properties of polypropylene melts, and easy deformation of toolboxes, etc. problems, to achieve the effect of improving the stability and uniformity of cell growth, good heat resistance, improving sag resistance and transverse tensile properties

Pending Publication Date: 2018-10-12
NANJING JULONG SCI&TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the blow molding tool box needs to place various tools of different shapes and functions, it has a very complicated internal bushing structure, which is completely different from its external planar structure. For the blow molding of such asymmetric structure products, polypropylene Micro-foamed materials face the following challenges: 1. Due to the linear molecular structure of polypropylene, its anti-sag performance during the blow molding process is very poor, coupled with the existence of cells, the embryo body is very prone to rupture during the inflation process; 2. 1. Due to the poor lateral tensile properties of the micro-foamed polypropylene melt, it is difficult to control the wall thickness of the blow molding toolbox; 3. Because polypropylene is easy to crystallize and shrink, the molded toolbox is very easy to deform and has poor dimensional stability

Method used

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  • Material for hollow blow-molded micro-foamed tool box and preparation method thereof
  • Material for hollow blow-molded micro-foamed tool box and preparation method thereof
  • Material for hollow blow-molded micro-foamed tool box and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0036] Described material component sees table 1;

[0037] The production method is step 1: 60 parts of copolymerized polypropylene, 5 parts of melt-blown polypropylene, 20 parts of talcum powder, 20 parts of propylene-ethylene elastomer, 1 part of organically modified montmorillonite, and 4 parts of glyceryl stearate , 5 parts of dehydrated glyceryl methacrylate grafted polyethylene, 2 parts of polypropylene wax, 1 part of antioxidant 1010, 0.2 part of Cytec 3808, mixed in a mixer for 2 minutes according to a certain number of parts by weight, and added to the double In the screw extruder, granulate at a temperature of 200-250°C, and the screw speed is 400r / min, to obtain a blow moldable toolbox polypropylene composite material;

[0038] Step 2: Add 12 parts of sodium bicarbonate into the single-screw blow molding machine from the side feeding port according to parts by weight; at the same time, add the toolbox polypropylene composite material obtained in step 1 to the barrel...

Embodiment 2

[0041] Described material component sees table 1;

[0042]The production method is step 1: 70 parts of copolymerized polypropylene, 30 parts of melt-blown polypropylene, 1 part of thermoplastic trans natural rubber, 0.1 part of organically modified montmorillonite, 0.4 part of polyethylene wax, polydimethylsiloxane 0.4 part of alkane, 0.4 part of polypropylene wax, 0.2 part of antioxidant 1010; 1 part of light stabilizer 944 was mixed in a mixer for 10 minutes according to a certain number of parts by weight, and was added into a twin-screw extruder through a hopper. Pelletizing at -250°C, with a screw speed of 700r / min, to obtain a polypropylene composite material for blow molding toolboxes;

[0043] Step 2: Add 0.5 parts of azobisisobutyronitrile into the single-screw blow molding machine from the side feeding port according to the weight part; at the same time, add the tool box polypropylene composite material obtained in step 1 to the single-screw blow molding machine mate...

Embodiment 3

[0046] Described material composition sees table 1;

[0047] The production method is step 1: 80 parts of copolymerized polypropylene, 20 parts of melt-blown polypropylene, 10 parts of talcum powder, 15 parts of ethylene-octene elastomer, 0.5 parts of organically modified attapulgite, and 2 parts of glyceryl stearate , 2.5 parts of polydimethylsiloxane, 1 part of erucamide, 0.5 part of antioxidant 1010, and 0.5 part of Cytec 3808 were mixed in a mixer for 6 minutes according to a certain number of parts by weight, and added to the twin-screw extruder through a hopper. In the machine, granulate at a temperature of 200-250°C, and the screw speed is 500r / min, to obtain a polypropylene composite material that can be blow molded;

[0048] Step 2: Add 6 parts of foaming agent OBSH into the single-screw blow molding machine from the side feeding port according to the parts by weight; at the same time, add the toolbox polypropylene composite material obtained in step 1 to the barrel o...

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Abstract

The invention relates to a tool box and a preparation method thereof, and particularly relates to a hollow blow-molded micro-foamed tool box and a preparation method of the tool box. The material related to the invention comprises the following components in parts by weight: 60-90 parts of co-polypropylene, 5-30 parts of melt-blown polypropylene, 0-20 parts of a filler, 1-20 parts of a modifier, 0.5-12 parts of a foaming agent, 1-10 parts of a foaming auxiliary agent, 0.5-2 parts of a lubricant, 0.2-1 part of an antioxidant and 0.2-1 part of a light stabilizer. The invention discloses the preparation method of the hollow blow-molded micro-foamed tool box. According to the invention, the tool box with a fine micropore structure is obtained. The anti-sagging property and the transverse stretching performance of the polypropylene melt in a blow-molding and micro-foaming process are effectively improved, the requirements of free regulation of wall thickness distribution of the product is met, the smooth operation of the polypropylene hollow blow-molding micro-foaming process is ensured, and the product has a significant characteristic of light weight. The tool box provided by the invention also has excellent dimensional stability, anti-dropping performance and anti-shocking performance. The preparation method provided by the invention has the advantages of shorter forming period, low manufacturing cost, high product qualification rate and easy realization of industrialization.

Description

technical field [0001] The invention relates to a toolbox material and a preparation method thereof, in particular to a hollow blow molding microfoaming toolbox material and a preparation method thereof. Background technique [0002] At present, the toolboxes on the market are mainly blow-molded high-density polyethylene toolboxes. However, the following problems are found in the process of use, for example: 1. The wall thickness of the current toolbox is too thick, the weight is too heavy, and it is not easy to carry. It is convenient, but when adjusting the wall thickness of the product, the pass rate of the blow molded finished toolbox is too low; 2. Some toolboxes, especially high-end toolboxes, require higher product strength and better heat resistance (even exceeding 80°C) , At present, the high-density polyethylene toolbox cannot meet the requirements; 3. The high-density polyethylene toolbox is prone to drop and breakage, and it is difficult to pass the 1.6m height a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/12C08L23/16C08L7/00C08L23/08C08L53/02C08K3/34C08K7/14C08K9/00C08K3/26C08K5/103C08J9/08C08J9/10B29C49/00
CPCC08J9/0023C08J9/0061C08J9/0066C08J9/0085C08J9/009C08J9/0095C08J9/08C08J9/102C08J9/105B29C49/0005B29C49/0031C08J2423/12C08K3/346C08K3/34C08K5/103C08J2203/04C08J2203/02C08J2323/14C08K9/04C08K9/00C08K7/14C08K2003/265C08K2201/011
Inventor 王滨刘曙阳蒋顶军阳明书
Owner NANJING JULONG SCI&TECH CO LTD
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