CN101412827A - Formula of plastic raw and supplemental materials for body of heat-insulating and temperature-increasing box - Google Patents

Abstract

The invention provides a formulation for a plastic supplementary material of a heat insulating-increasing box body. Components and mixture ratio of the supplementary material are as follows: 80 kilograms of high-density polyethylene (HDPE), 15 kilograms of low-density polyethylene (LDPE), 3 kilograms of linear low-density polyethylene (LLDPE), 2 kilograms of ethylene-vinyl acetate (EVA), 0.03 kilogram of color master batch, 0.3 kilogram of nano-scale plastic function modifier and 0.5 kilogram of filler. Because of modifications to an HDPE material and increases in micropores on the surface of plastics, the formulation improves the binding force between plastic sheets of the inner and outer surfaces of a plastic shell and PU polyurethane foam heat-insulating layers, thereby effectively overcoming the defect that the plastic shell of a heat insulating-increasing box is susceptible to deformation and cracks.

Description

The plastics supplementary material prescription of insulation temperature-increasing box casing

Technical field

The present invention relates to plastics supplementary material prescription, be specifically related to a kind of plastics supplementary material prescription of making the insulation temperature-increasing box casing that uses in the delivery service.

Background technology

Insulation temperature-increasing box casing is made of the plastic casing that has thermal insulation layer mostly, the cross section structure characteristics of the wall of this plastic casing are: inside and outside surface is a sheet plastic, the centre is a plastic foam heat-insulation and heat-preservation material, wherein inside and outside surperficial sheet plastic adopts the HDPE high-density polyethylene material to make, and middle insulating is the PU polyurethane foam.

Because the thin sheet surface that adopts the HDPE high-density polyethylene material to make is smooth, be difficult to combine closely with polyurethane foam insulation layer, therefore be incubated that frequently standing in the temperature-increasing box use expands with heat and contract with cold very easily makes HDPE high density polyethylene(HDPE) shell separate with the PU polyurethane foam insulation layer, and then cause casing deformation, cracking, shorten the work-ing life of product.

Summary of the invention

The purpose of this invention is to provide a kind of plastics supplementary material prescription that is incubated the temperature-increasing box casing, use this prescription to make the plastic casing of insulation temperature-increasing box casing, can improve the bonding force of plastic casing and PU polyurethane foam insulation layer.

The technical scheme of taking of the present invention is:

A kind of plastics supplementary material prescription that is incubated temperature-increasing box, its supplementary material composition and proportioning are as follows:

80 kilograms of HDPE high density polyethylene(HDPE)s,

15 kilograms of LDPE new LDPE (film grade)s,

3 kilograms of LLDPE linear low density polyethylenes,

2 kilograms of EVA ethene-vinyl acetate between to for plastics,

0.03 kilogram of Masterbatch,

0.3 kilogram of nano level plastic functional properties-correcting agent,

0.5 kilogram of stopping composition;

The main component of the nano level plastic functional properties-correcting agent in the above-mentioned prescription and performance index require as follows:

Main component: barium, strontium, silicon the multiple element compound,

Primary particle diameter＜50nm,

Specific surface area〉33 meters squared per gram,

Loose density is a 0.2-0.3 gram/cubic centimetre,

Tightness＜0.5 gram/cubic centimetre,

Degree of activation is 99%.

The present invention is by carrying out modification modification again to the HDPE high-density polyethylene material, make frosting increase micropore, therefore improve the bonding force of inside and outside surperficial sheet plastic of plastic casing and PU polyurethane foam insulation layer, thereby effectively overcome yielding, the rimose defective of insulation temperature-increasing box plastic casing.

Embodiment

The invention will be further described below in conjunction with embodiment.

The plastic casing of insulation temperature-increasing box casing adopts rotational molding technique machine-shaping, and its technological process is as follows:

Add HDPE high density polyethylene(HDPE), LDPE new LDPE (film grade), LLDPE linear low density polyethylene, EVA ethene-vinyl acetate between to for plastic by above-mentioned prescription earlier, carry out the superpolymer blending and modifying, the back adds Masterbatch, stopping composition, nano level plastic functional properties-correcting agent, carries out superpolymer blend modification again; After the raw and auxiliary material branch that enters prescription system successively carries out blend, be even, use duplex bar blend extruding pelletization; Plastic granule with above formation drops in the rotomoulding apparatus then, and attemperation, in the period, reaches required temperature until material, the moulding of beginning rotational molding technique.

Claims (1)

1. plastics supplementary material prescription that is incubated temperature-increasing box, its supplementary material composition and proportioning are as follows:

80 kilograms of HDPE high density polyethylene(HDPE)s,

15 kilograms of LDPE new LDPE (film grade)s,

3 kilograms of LLDPE linear low density polyethylenes,

2 kilograms of EVA ethene one vinyl acetate between to for plastics,

0.03 kilogram of Masterbatch,

0.3 kilogram of nano level plastic functional properties-correcting agent,

0.5 kilogram of stopping composition;

The main component of the nano level plastic functional properties-correcting agent in the above-mentioned prescription and performance index are wanted

Ask as follows:

Main component: barium, strontium, silicon the multiple element compound,

Primary particle diameter＜50nm,

Specific surface area〉33 meters squared per gram,

Loose density is a 0.2-0.3 gram/cubic centimetre,

Tightness＜0.5 gram/cubic centimetre,

Degree of activation is 99%.