CN201826676U

CN201826676U - Micro-foamed co-extrusion profile

Info

Publication number: CN201826676U
Application number: CN2010205362307U
Authority: CN
Inventors: 潘力群; 陈高其
Original assignee: ZHONGCAI FORMED MATERIAL CO Ltd ZHEJIANG
Current assignee: ZHONGCAI FORMED MATERIAL CO Ltd ZHEJIANG
Priority date: 2010-09-20
Filing date: 2010-09-20
Publication date: 2011-05-11
Anticipated expiration: 2020-09-20

Abstract

A micro-foamed co-extrusion profile comprises a profile substrate, and is characterized in that a co-extrusion layer is arranged on at least one surface of the profile substrate and is a foaming layer of a micro-foamed structure. The micro-foamed co-extrusion profile provided by the utility model has the advantages of good surface sensing effect, low heat conductivity, favorable sound wave damping performance, and good dimensional stability.

Description

Little foaming co-extrusion profile shapes

Technical field

The utility model belongs to door and window profile material, relates in particular to a kind of plastic door and windows profile.

Background technology

Plastics-steel shapes for door and window is introduced China by the west eighties, through 20 years of development, home products has begun to enter the developing period of technological innovation the end of the nineties, successively produced colored ASA/PVC, the PMMA/PVC product, the chromatic spray painting product, the overlay film product, colored entire body product, wherein the wood texture effect that has of overlay film product is the most desirable, the wood texture of this product surface is produced by the wood texture effect that PVC or PMMA film are printed on the section bar surface, this film coating technique originates from Germany, this technical level has developed into very high level at present, but its overlay film cost accounts for about 1/2 of the own cost of section bar, and its too high cost is that portion is seldom at home for this product.

The defective that existing overlay film doorframe exists: surperficial sensory effects is relatively poor, thermal conductivity is higher, the sound wave damping and amortization is relatively poor, dimensional stability is relatively poor.

Summary of the invention

For the deficiency that surperficial sensory effects is relatively poor, thermal conductivity is higher, the sound wave damping and amortization is relatively poor, dimensional stability is relatively poor of the overlay film door-window section bar that overcomes, the utility model provides that a kind of surperficial sense organ is respond well, thermal conductivity is low, sound wave damping and amortization excellence, little foaming co-extrusion profile shapes that dimensional stability is good.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of little foaming co-extrusion profile shapes comprises the section bar matrix, it is characterized in that: be provided with coextruded layer at least one surface of section bar matrix, described coextruded layer is the foaming layer of little foaming structure.

Technical conceive of the present utility model is: the little foaming extrusion plastic products of PVC is started in the sixties in last century, development along with foaming technique, it has been applied in the plastic extrusion products aspect gradually, but because the difficulty in this technology processing, its profile shapes in multi-cavity body section structure is had difficulties, yet there are no the play-by-play of little foaming co-extrusion profile shapes.Along with the development of co-extrusion technology and little foaming technique, with of the application of little foaming technique, can provide good surperficial sensory effects, and can be inferior light, the enforcement platform that The Application of Technology such as embossed surface provide on profile shapes co-extrusion surface.Utilize the expanded material low heat conductivity, the advantage of excellent sound wave damping and amortization can play good heat-insulation and heat-preservation, soundproof effect, and because of the event of foaming, residual stress is almost nil in the goods simultaneously, the product size good stability, linear expansion coeffcient is low.And being applied in " national plastic cement industry " 10th Five-Year Plan and 2015 planning " " of PVC foaming technique is definite, complies with the technological investment direction of country, and the application of foaming technique aspect the PVC profile shapes needs development rapidly and efficiently.Production technology and little foaming raw material proportioning are the major reason of restriction foaming technique at PVC profile shapes application development always.

The beneficial effects of the utility model mainly show: 1, surperficial sense organ is respond well, thermal conductivity is low, sound wave damping and amortization excellence, dimensional stability are good; After 2 pairs of coextruded layers carry out single face or multiaspect extrusion foaming, on the basis that guarantees properties of product, embodied the advantage of foam plastic product; Processing technology and expanded material are controlled easily, and foaming technique well is being developed aspect the PVC profile shapes, make the PVC profile shapes further move towards variation.

Description of drawings

Fig. 1 is the schematic diagram of little foaming co-extrusion profile shapes, and 1 is the profile shapes matrix, and 2 is little foaming coextruded layer.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further described.

With reference to Fig. 1, a kind of little foaming co-extrusion profile shapes comprises section bar matrix 1, is provided with coextruded layer 2 at least one surface of section bar matrix, and described coextruded layer 2 is the foaming layer of little foaming structure.

The foaming layer of present embodiment is made up of the raw material of following mass fraction: 100 parts of polyvinyl chloride resins, complex lead salt stabilizer 3.5-5.0 part, AC composite foamable agent 0.5-1.0 part, acrylic compounds foaming control agent 5.0-8.0 part.

The raw material of described foaming layer also comprises: hybrid pigment, the umber of described hybrid pigment is: 0-8 part.

Described hybrid pigment is for by black and three primary colors pigment separately or cooperate the color dye that forms.

In order to make better quality of the present invention, cost is lower, and the raw material of described foaming layer also comprises following one or more mixing: 1. process rheological agent 0.1-0.2 part, 2. OPE sliding agent 0.1-0.2 part, 3. filler 10-15 part, 4. titanium dioxide 3-8 part.

In the present embodiment, expanded material prescription: the affirmation of expanded material prescription, the application of this technology aspect plastic irregular profile will guarantee that also it has good processing characteristics and good weather except that the advantage that will give full play to expanded material, just require the prescription design to go up and want rationally:

The above is a preferable embodiment of the present invention, is not that technical scheme of the present invention is done any pro forma restriction.Every foundation technical spirit of the present invention is to any simple modification that above embodiment did, and equivalent variations and modification all belong in the scope of patent protection of the present invention.

The preparation method of little foaming co-extrusion profile shapes of present embodiment may further comprise the steps:

(1) foaming layer is made up of the raw material of following mass fraction: 100 parts of polyvinyl chloride resins, complex lead salt stabilizer 3.5-5.0 part, AC composite foamable agent 0.5-1.0 part, acrylic compounds foaming control agent 5.0-8.0 part; Above-mentioned all raw materials through high low-temperature mixed, are made uniform mixed material;

(2) mixed material is passed through Granulation Equipments, granulation obtains little foaming co-extrusion granulation material under 170 ℃ of conditions;

(3) will carry out drying in above-mentioned little foaming co-extrusion granulation material adding drier, temperature is set to 60 ℃, and drying time is more than 4 hours;

(4) single screw rod or the auxiliary extruder of twin-screw are installed on section bar main body extruding dies next door, temperature is set between 150 ~ 170 ℃.When the section bar main body is extruded, by single screw rod or the auxiliary extruder of twin-screw little foaming co-extrusion granulation material is extruded, in the foaming co-extruding mould, converge with the section bar body surfaces, make the surface of section bar main body form co-extrusion profile shapes with little foaming structure.

(5) after the profile shapes section bar was extruded and finished, the profile shapes with little foaming structure entered section bar stock mould and cooling water tank typing;

(6) section bar enters tractor and pastes diaphragm before after typing is handled.

The raw material of described foaming layer also comprises following one or more mixing: 1. process rheological agent 0.1-0.2 part, 2. OPE sliding agent 0.1-0.2 part, 3. filler 10-15 part, 4. titanium dioxide 3-8 part.

The raw material of described foaming layer also comprises wood powder.

In the described step (4), after the foaming co-extrusion, carry out following one or more processing on the surface of foaming layer: 1. heat treatment; 2. water transfer printing; 3. hot transfer printing.

According to the little foaming co-extrusion of this patent profile shapes, it is characterized in that the used production equipment of this technical products, mainly comprise Ф 65,55 twin-screw taper extruders and the fusing that to melt and to extrude non-co-extrusion face resin and the single screw extrusion machine of extruding the Ф 35,45 of co-extrusion face expanded material; And the resin extruded of extruding can be become definite shape be forming mould; Also has the vacuum sizing device that the product of extrusion molding is carried out cooling and shaping simultaneously.Production equipment for this patented technology also has its specific (special) requirements, as single screw extrusion machine to extrude compression ratio little, for unlike material different requirements are arranged, can between 1:1.2 to 1:1.8, select; In addition, foam composite material requires co-extruding flow channel bigger than common non-foam composite material, and it is big that want in the foaming mould gap, and its corresponding gap difference of unlike material is bigger by about 1/4 than general die clearance.

According to the little foaming co-extrusion of this patent profile shapes, it is characterized in that to carry out surfacing, i.e. postprocessing working procedures by different processing technologys to it at product surface by after the foaming co-extrusion, as: by the hot-pressing processing The Application of Technology, make its co-extrusion material surface manifest the three-dimensional pattern effect; The water transfer printing, hot transfer technique is in the application of coextruded layer; By on the basis of selected materials, add a certain amount of high-quality wood powder, make it extrude the surface and present the wood texture effect, finally make the variation of product surface effect, satisfied people's visual effect and design requirement.

In the present embodiment, the factor control in the process, the enforcement of little foamed products processing technology, processing temperature has bigger influence to the foaming effect of little foamed profile, and is too high or too low all bad.If temperature is too high, the foaming degree of goods is higher, and problems such as putty appear in the bad stability of production easily; If temperature is low excessively, can reduce plasticizing effect and the foaming effect of PVC, density increase, the partial properties of goods are reduced; Actual temp reference table 1:

Table 1

The used production equipment of this technical products mainly comprises Ф 65 twin-screw taper extruders and the fusing that can melt and extrude non-co-extrusion face resin and the single screw extrusion machine of extruding the Ф 35 of co-extrusion face expanded material; And the resin extruded of extruding can be become definite shape be forming mould; Also has the vacuum sizing device that the product of extrusion molding is carried out cooling and shaping simultaneously.

Final products The performance test results contrast, referring to table 2:

Contrast object: common co-extrusion profile shapes and little foaming co-extrusion profile shapes.

Table 2

It mainly is the physical property that influences product for foamed products, by the adjustment to formula system, makes the performance of little foaming co-extrusion section bar and existing common co-extrusion profile shapes approaching, and meets request of national standard.

In sum, little foaming co-extrusion profile shapes is on technology is used, and to the formulation selection requirement of product, and production technology, production equipment etc. all have its different requirement.By formulation optimization and manufacture control to the little foaming co-extrusion of moulding profile shapes, make it outside the performance requirement that has guaranteed profile shapes, more given the characteristic of product foam composite material, simultaneously, also the post processing variation for product provides convenience.

Claims

1. a little foaming co-extrusion profile shapes comprises the section bar matrix, it is characterized in that: be provided with coextruded layer at least one surface of section bar matrix, described coextruded layer is the foaming layer of little foaming structure.