CN105462104A

CN105462104A - PVC crusted foamed building composite batten

Info

Publication number: CN105462104A
Application number: CN201510469824.8A
Authority: CN
Inventors: 黄豪杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-08-04
Filing date: 2015-08-04
Publication date: 2016-04-06

Abstract

The invention relates to the field of building materials, and especially relates to a PVC crusted foamed building composite batten. The PVC crusted foamed building composite batten is disclosed against the problems of easy damages, no corrosion resistance, huge wastes and little recovery and reuse of present building wood battens used as a supporting system. The PVC crusted foamed building composite batten is made from, by weight, 20-25 parts of fresh PVC, 0.8-1 part of a PVC stabilizer, 3-3.5 parts of a PVC foaming regulator, 0.6-0.8 parts of an AC foaming agent, 10-15 parts of light calcium carbonate, 0.2-0.3 parts of stearic acid, 0.2-0.3 parts of PE paraffin, 2.2-2.5 parts of an ACR impact modifier for PVC, 5-7 parts of a PVC processing assistant, 80-90 parts of reclaimed PVC and 200m of 4mm*6mm bamboo canes. The composite batten can completely substitute traditional battens, can be recycled and multiply processed, and reduces carbon discharge.

Description

A kind of PVC foam building compound flitch

Technical field

The present invention relates to building material field, particularly a kind of PVC foam building compound flitch.

Background technology

The template of the cast-in-place concrete structure in present building engineering construction is propped up in the process of building, need a large amount of wooden flitches as its support system, wooden flitch easy damaged, not corrosion-resistant, waste huge, seldom reclaim and can again utilize, more than 95% waste material all makes a fire heat-obtaining, to such an extent as to atmosphere pollution, destroy a large amount of forest reserves.

Along with the development of time, polyvinyl chloride (PVC) matrix material engenders that in the middle of our daily life, PVC type material is pollution-free, toxicological harmless, can saw, can cut, can dig, can follow closely, anticorrosion, moistureproof, fire-retardant, efflorescence prevention, recyclable recycling, the character of its uniqueness is approved by people and affirms.

PVC foam building compound flitch is the one of PVC low ratio foamed plate.Formula is main raw material(s) with PVC, be equipped with stablizer, lubricant, whipping agent, filler, cell modifiers, anti-impact modifier etc., formative stage by Vacuum shaping formed surface density large, hardness is high, the section structure that intermediate density is little, hardness is relatively low, one deck sclerderm tied by the surface picture of sheet material, so be foam plate.

The wooden flitch that PVC foam building compound flitch of the present invention mainly replaces current trend to use.

Summary of the invention

For the wooden flitch of present building engineering construction as its support system, easy damaged, not corrosion-resistant, waste huge, seldom reclaim and can again utilize, burn atmosphere pollution, destroy the problem of a large amount of forest reserves.

The invention provides a kind of PVC foam building compound flitch, by following parts by weight:

PVC(SG7) virgin material 20-25 part

PVC stabilizer 0.8-1 part

PVC foam conditioning agent 3-3.5 part

AC whipping agent 0.6-0.8 part

Light calcium carbonate 10-15 part

Stearic acid 0.2-0.3 part

PE paraffin 0.2-0.3 part

PVC is with ACR anti-impact modifier 2.2-2.5 part

PVC processing aid 5-7 part

PVC reclaiming material 80-90 part

And 4mm*6mm bamboo cane 200m

Make.

Its preparation method is: obtained by following steps:

Step one, metering:

It is for subsequent use that materials press stoichiometry;

Step 2, high speed blended stock:

First by PVC(SG7) virgin material, PVC stabilizer, light calcium carbonate, stearic acid, PE paraffin, PVC ACR anti-impact modifier, PVC processing aid, PVC reclaiming material add mixer successively and stir, treat that material temperature arrives 90 DEG C ± 2 DEG C and adds whipping agent again, continue stirring and reach 110 DEG C--drop into after 130 DEG C in cold mixer;

The cooling of step 3, raw material is stirred:

Cooling is uniformly mixed raw material when the temperature to 40 DEG C--be discharged to charge utensil after 60 DEG C;

Step 4,

To 65 conical double-screw heated extruder with extrude grinding tool and carry out preheating, temperature reaches 160 DEG C--and 170 DEG C of beginning material loadings carry out start processing, after material to be heated extrudes aftershaping in mould, 4mm*6mm bamboo cane is inserted mould to be made in the compound flitch of bamboo cane injection moulding, reenter cooling and shaping platform, after being stretched to cutting bed with tractor;

Step 5, cutting:

According to required shape, flitch is cut;

Step 6, inspection warehouse-in.

Twin-screw extrusion shaping foam lumps of wood technological temperature:

Feeding section 130 DEG C ~ 140 DEG C;

Shear section 140 DEG C ~ 160 DEG C;

Fluxing zone 160 DEG C ~ 170 DEG C;

Homogenizing zone 175 DEG C ~ 180 DEG C;

Merging core 160 DEG C;

175 DEG C ~ 185 DEG C, mould;

Vacuum-0.5Pa engine speed 250 turns of ∕ divide, and pulling speed 180 turns of ∕ divide.

PVC foam building wood composite of the present invention can substitute traditional building flitch completely; not only save cost; also reduce the dependence to trees, the PVC foam lumps of wood and traditional building lumps of wood character basic simlarity, but this product density is little; fire-retardant; recyclable circulation is repeatedly processed, and can be described as in afforestation in a sense, reduces carbon emission; protect our Green Homeland, the beautiful earth of building together.

Accompanying drawing explanation

Fig. 1 is PVC foam of the present invention building compound flitch product figure.

Embodiment

Be described in detail below in conjunction with the content of embodiment to invention:

appointed condition

High low speed raw material mixing machine

ZD series helix feeder

65 conical double-screw heated extruder

Lumps of wood heating extrusion die

Cooling calibrator

Lumps of wood stretching and drawing machine

Lumps of wood cutting machine

Finished product bander

The old material crusher of raw material

The old material pulverizing mill of PVC

Air compressor

embodiment 1

A kind of PVC foam building compound flitch, by following weight fraction

PVC(SG7) virgin material 25 parts

PVC stabilizer 1 part

PVC foam conditioning agent 3.5 parts

AC whipping agent 0.8 part

Light calcium carbonate 15 parts

Stearic acid 0.3 part

0.3 part, PE paraffin

PVC ACR anti-impact modifier 2.5 parts

PVC processing aid 7 parts

90 parts, PVC reclaiming material

And 4mm*6mm bamboo cane 200m

Make.

Its preparation method is obtained by following steps

Step one, metering:

It is for subsequent use that materials press stoichiometry;

Step 2, high speed blended stock:

The cooling of step 3, raw material is stirred:

Step 4,

Step 5, cutting:

According to required shape, flitch is cut;

Step 6, inspection warehouse-in.

embodiment 2

A kind of PVC foam building compound flitch, by following weight fraction

PVC(SG7) virgin material 20 parts

PVC stabilizer 0.8 part

PVC foam conditioning agent 3 parts

AC whipping agent 0.6 part

Light calcium carbonate 10 parts

Stearic acid 0.2 part

0.2 part, PE paraffin

PVC ACR anti-impact modifier 2.2 parts

PVC processing aid 5 parts

80 parts, PVC reclaiming material

And 4mm*6mm bamboo cane 200m

Make.

Its preparation method is:

Following steps are had to obtain

Step one, metering:

It is for subsequent use that materials press stoichiometry;

Step 2, high speed blended stock:

The cooling of step 3, raw material is stirred:

Step 4,

Step 5, cutting:

According to required shape, flitch is cut;

Step 6, inspection warehouse-in.

embodiment 3

A kind of PVC foam building compound flitch, by following weight fraction

PVC(SG7) virgin material 23 parts

PVC stabilizer 0.9 part

PVC foam conditioning agent 3.3 parts

AC whipping agent 0.7 part

Light calcium carbonate 12 parts

Stearic acid 0.25 part

0.25 part, PE paraffin

PVC ACR anti-impact modifier 2.4 parts

PVC processing aid 6 parts

85 parts, PVC reclaiming material

And 4mm*6mm bamboo cane 200m

Make.

Its preparation method is:

Following steps are had to obtain

Step one, metering:

It is for subsequent use that materials press stoichiometry;

Step 2, high speed blended stock:

The cooling of step 3, raw material is stirred:

Step 4,

Step 5, cutting:

According to required shape, flitch is cut;

Step 6, inspection warehouse-in.

product inspection method:

(1) plate face: be smooth to the touch smooth, mechanical texture is not obvious, surface color no color differnece, oyster white, surperficial inviolateness, without obvious pitting, free of pinholes, without thick eyelet, crack.

(2) plate side: otch is smooth, and hole is fine and closely woven, free of pinholes, without thick eyelet, dry linting is not serious, and without bee-hole, sawing sheet fiber is from coming off, and do not jump mouth.

(3) thickness measurement: when slide calliper rule stand up surface, contact closed seamless gap, left and right thickness is even, and left, center, right is measured, and whether deviation is very large, and the positive and negative 0.2MM of thickness deviation is normal.

PVC foam building compound flitch: main materials are polyvinyl chloride resin reclaiming material, the mean polymerisation degree of the PVC adopted is 800 ~ 1000, i.e. SG6, SG7 type polyvinyl chloride resin, adding a certain proportion of whipping agent, stablizer, lubricant, nucleator, processing aid, the composition such as weighting agent materials proportioning, have anticorrosion, moistureproof, mildew-resistant, do not absorb water, can bore, can follow closely, can saw, can dig, be easy to thermoforming, thermal flexure is processed, the characteristics such as recyclable utilization again, to saving the valuable forest reserves, save energy, preserve the ecological environment and promote that the Sustainable development of human society has far reaching significance.

Technological operation main points

The adjustment of mould and barrel zone temperature, raw material depanning rate of expansion will reach requirement, excessive or too smallly all can not reach required product.

Control the speed of mouth mould current, to form suitable skinning, reach preliminary sizing.

Adjust the speed of knot main frame and traction, make discharge port and the shaping lumps of wood remain a kind of equilibrium state.

Certain vacuum tightness is kept to be conducive to the shaping of the foam lumps of wood.

PVC foam building compound flitch products characteristics

1, the intensity of this product and toughness can reach the technical requirements of wooden flitch building template construction.

2, goods are opaque, and surperficial sub-light, can print.

3, there is sound insulation, heat insulation, insulation, sound-absorbing, the performance such as heat insulation, shockproof.

4, there is flame retardant resistance, can from fire from putting out.

5, protection against the tide, mildew-resistant, do not absorb water, acid and alkali-resistance.

6, after adding color masterbatches, product can be made into multiple color.

7, after weather-proof formula is made, its color and luster can permanency, not easily aging.

The processing such as 8, can carry out boring, saw, follow closely, dig, glue as timber, use general wood working tool to construct.

9, finished product can carry out the shaping and folding processing of second heat, can be directly bonding with other PVC material.

10, quality is light, accumulating, easy construction.

Product performance:

Applicable temperature :-50 degrees Celsius-70 degrees centigrade

Heating temperature: 70 degrees centigrade-120 degrees centigrade (making section bar)

Flexural strength: 45.6mpa

Low temperature: (-5 degrees Celsius of bells that fall impact) 10 zero fragmentations

Life-span: be not less than 50 years.

pVC foam technology controlling and process key point

Plastic foamedly shapingly be divided into three processes:

The solidification of the formation of nuclei of bubbles, the expansion of nuclei of bubbles and foam.For the PVC foam sheet material adding chemical foaming agent, the quality of expansion to foam sheet of nuclei of bubbles plays decisive influence.

PVC belongs to straight-chain molecule, and molecular chain is shorter, and melt strength is low, and expand in bubble process in nuclei of bubbles, melt is not enough to envelope bubble, and gas easily overflows and is merged into bulla, reduces the quality product of foam sheet.

The key factor improving PVC foam sheet quality improves the melt strength of PVC.

From processing of high molecular material specificity analysis, the method improving PVC melt strength has multiple, but most efficient manner is added the auxiliary agent that improves melt strength and reduces processing temperature.

PVC belongs to non-crystalline material, and the raising melt strength with melt temperature reduces, otherwise reduces melt strength raising with melt temperature, but the limited use of cooling only plays booster action.

Foaming control agent is the most effective, and melt strength increases with foaming control agent content and improves.Generally speaking, as long as screw rod has enough dispersive mixing capability, add full-bodied foaming control agent more obvious to raising melt strength effect.

the effect of processing aid in PVC foam sheet material

ACR(processing aids acrylic resin) class processing aid has and promotes PVC melting, improve surface smoothness, improve the elasticity of melt, strengthen the elongation of melt and the effect of intensity, be conducive to coated bubble, prevent abscess from subsiding.

The molecular weight of foaming control agent and the density of consumption to foamed sheet all have a great impact: along with the raising of molecular weight, and PVC melt strength improves, and it is lower that the density of foamed sheet can be done, and have identical effect with the consumption improving conditioning agent.But a linear relationship is not had in this effect, continue increase molecular weight or improve consumption, be not clearly to falling low-density effect, density will be tending towards constant.

Important relation is there is between foaming control agent and whipping agent, there is a trim point in the density of foamed sheet and foaming control agent, outside this trim point, foamed sheet density is not by the impact of foaming agents content, maintain constant, namely increase foaming agent consumption and can not reduce density, cause the reason of this phenomenon to be under a certain amount of foaming control agent consumption, the melt strength of PVC is limited, and excessive gas causes abscess to subside or merges.

In PVC foam sheet material extrusion, the problem of encountering can be classified as 4 classes substantially, and one is stability problem; Two is melt strength problems; Three is lubrication problems; Four is scattering problems.This four classes problem particularly first three class problem can restrict mutually, cross influence, and be sometimes difficult to distinguish one from the other at once viewed from surface phenomena, melt strength deficiency can cause foamed sheet abscess large, and rip cutting papula is very long.Judge that whether melt strength is not enough, the most direct way is after three rollers, press with finger the sheet material wrapped on central roll, can feel elasticity when melt strength presses well.If be difficult to upspring after pressing, illustrate that melt strength is poor.Because screw-rod structure and type of cooling difference are comparatively large, be difficult to judge that whether temperature is reasonable, in general, in the load that forcing machine allows, 3-5 district's temperature are with as well low.

Want to obtain uniform in foaming goods in foam pipe, also need to ensure that PVC material has good melt body intensity.

Lubricant is divided into external lubricant and internal lubricant, and outer cunning is conducive to the demoulding, is beneficial to the smoothness of plate surface, very little, forcing machine 5 district temperature is wayward, easily heats up for outer cunning, this can cause merging core temperature high, and go out the problem such as bulla, string bubble, jaundice in the middle of sheet material, plate surface is also rough; Outer cunning is many, and precipitation can become serious, shows the precipitation that structure in mould and plate surface are slided outward, also can show as that some some phenomena is irregular on plate face to move around.Interior cunning is conducive to the mobility of plasticizing and melt, and interior cunning not pedal plate face is difficult to control thickness, shows as sheet material thick middle both sides thin; Interior cunning is many, easily occurs the phenomenon that merging core temperature is high.

Technological temperature control problem: four problems above-mentioned belongs to fundamental issue, being basis, is deep-seated problem.

Technological temperature controls then to want much directly perceived, be cosmetic issue, but temperature controls bad, can bring out the appearance of root problem.

Improve complete processing temperature, the material settling out time can reduce, and occurs stability problem; Original lubrication balance can be broken, and generally shows as outer lack of lubrication, particularly later stage and lubricates outward, lubricates addition outside need improving; Temperature raising also can cause melt strength to reduce, and foam sheet abscess increases, and abscess quantity reduces, sheet material embrittlement easy fracture; Temperature raising reduces melt strength and also can reduce melt viscosity, and viscosity drop low sheraing dispersive ability reduces, the screw rod not strong for dispersive ability, occurs that dispersion is uneven sometimes.

Pass through material quantity in the present invention and add opportunity, and the control of processing condition especially temperature, make terms and conditions in PVC foam sheet material making processes all control in rational state, obtained PVC foam sheet flitch good product quality, durable, there are good economy and social value.

Claims

1. a PVC foam building compound flitch, is characterized in that by following parts by weight:

PVC(SG7) virgin material 20-25 part

PVC stabilizer 0.8-1 part

PVC foam conditioning agent 3-3.5 part

AC whipping agent 0.6-0.8 part

Light calcium carbonate 10-15 part

Stearic acid 0.2-0.3 part

PE paraffin 0.2-0.3 part

PVC is with ACR anti-impact modifier 2.2-2.5 part

PVC processing aid 5-7 part

PVC reclaiming material 80-90 part

And 4mm*6mm bamboo cane 200m makes;

Its preparation method is:

Obtained by following steps:

Step one, metering:

It is for subsequent use that materials press stoichiometry;

Step 2, high speed blended stock:

The cooling of step 3, raw material is stirred:

Step 4,

Step 5, cutting:

According to required shape, flitch is cut;

Step 6, inspection warehouse-in.

2. a kind of PVC foam building compound flitch according to claim 1, is characterized in that by following parts by weight:

PVC(SG7) virgin material 20 parts

PVC stabilizer 0.8 part

PVC foam conditioning agent 3 parts

AC whipping agent 0.6 part

Light calcium carbonate 10 parts

Stearic acid 0.2 part

0.2 part, PE paraffin

PVC ACR anti-impact modifier 2.2 parts

PVC processing aid 5 parts

80 parts, PVC reclaiming material

And 4mm*6mm bamboo cane 200m makes.

3. a kind of PVC foam building compound flitch according to claim 1, is characterized in that by following weight fraction:

PVC(SG7) virgin material 25 parts

PVC stabilizer 1 part

PVC foam conditioning agent 3.5 parts

AC whipping agent 0.8 part

Light calcium carbonate 15 parts

Stearic acid 0.3 part

0.3 part, PE paraffin

PVC ACR anti-impact modifier 2.5 parts

PVC processing aid 7 parts

90 parts, PVC reclaiming material

And 4mm*6mm bamboo cane 200m makes.

4. a kind of PVC foam building compound flitch according to claim 1, is characterized in that by following weight fraction:

PVC(SG7) virgin material 23 parts

PVC stabilizer 0.9 part

PVC foam conditioning agent 3.3 parts

AC whipping agent 0.7 part

Light calcium carbonate 12 parts

Stearic acid 0.25 part

0.25 part, PE paraffin

PVC ACR anti-impact modifier 2.4 parts

PVC processing aid 6 parts

85 parts, PVC reclaiming material

And 4mm*6mm bamboo cane 200m makes.

5. a kind of PVC foam building compound flitch according to claim 1, is characterized in that twin-screw extrusion shaping foam lumps of wood technological temperature:

Feeding section 130 DEG C ~ 140 DEG C, fluxing zone 160 DEG C ~ 170 DEG C.

6. a kind of PVC foam building compound flitch according to claim 1, is characterized in that twin-screw extrusion shaping foam lumps of wood technological temperature:

Shear section 140 DEG C ~ 160 DEG C.

7. a kind of PVC foam building compound flitch according to claim 1, is characterized in that twin-screw extrusion shaping foam lumps of wood technological temperature:

Homogenizing zone 175 DEG C ~ 180 DEG C.

8. a kind of PVC foam building compound flitch according to claim 1, is characterized in that twin-screw extrusion shaping foam lumps of wood technological temperature:

Merging core 160 DEG C.

9. a kind of PVC foam building compound flitch according to claim 1, is characterized in that twin-screw extrusion shaping foam lumps of wood technological temperature:

175 DEG C ~ 185 DEG C, mould.

10. a kind of PVC foam building compound flitch according to claim 1, is characterized in that the twin-screw extrusion shaping foam lumps of wood 65 conical double-screw heated extruder speed control is: