CN105062049A

CN105062049A - Soft nylon composite material with injection molding capacity, cutting resistance and low wear loss and preparation method of soft nylon composite material

Info

Publication number: CN105062049A
Application number: CN201510419845.9A
Authority: CN
Inventors: 张哲�
Original assignee: QINGDAO KEKAIDA RUBBER PLASTIC CO Ltd
Current assignee: QINGDAO KEKAIDA RUBBER PLASTIC CO Ltd
Priority date: 2015-07-16
Filing date: 2015-07-16
Publication date: 2015-11-18
Anticipated expiration: 2035-07-16
Also published as: CN105062049B

Abstract

The invention belongs to the field of engineering plastics, and particularly relates to a soft nylon composite material with injection molding capacity, cutting resistance and low wear loss and a preparation method of the soft nylon composite material. The soft nylon composite material comprises components as follows: 100 parts of PA 610 (polyamide 610), 0-16 parts of castor oil, 1-3 parts of dendritic polyol, 30-70 parts of abrasive compounds, 0.1-1.5 parts of sodium dihydrogen phosphate, 4-15 parts of spherical polytetrafluoroethylene powder and 0-4 parts of amino silicone.

Description

One can injection moulding, resistance to cutting, soft nylon composite materials of low abrasion and preparation method thereof

Technical field

The invention belongs to engineering plastics field, being specifically related to one can injection moulding, resistance to cutting, soft nylon composite materials of low abrasion and preparation method thereof.

Background technology

Nylon due to molecular chain have repetition-[NHCO]-group, have pliable and tough, the feature of low-friction coefficient, show the feature of low abrasion, therefore manufactured the material of various low abrasion by modification; The precision metallic product of high surface requirements, precise plastic product process aspect, soft nylon efficiently can polish high finish surface, nylon is needed to possess high cutting power and low abradability like this, although be that the various nylon monomer-cast nylons of representative have low abradability, cutting power wretched insufficiency with nylon monomer-cast nylon, priorly do not manufacture wear-resisting product fast by Shooting Technique, have a strong impact on production efficiency, improve manufacturing cost; One can injection moulding, resistance to cutting, and the soft nylon composite materials of low abrasion becomes the market requirement;

Summary of the invention

The present invention is the cutting power improving nylon, pliability, low wear loss (the low abradability especially when high frequency rubs); To a kind of precision metallic product being mainly used in high surface requirements be manufactured, the surface finish process of precise plastic product can injection moulding, resistance to cutting, the soft nylon composite materials of low abrasion; The present invention is achieved through the following technical solutions:

One can injection moulding, and resistance to cutting, the soft nylon composite materials of low abrasion, is made up of the raw material of weighing scale shown below

Material name

Component

PA610	100 parts
		Viscotrol C	0-16
Dendrimeric polyols	1-3
		Compounded abrasive	30-70
SODIUM PHOSPHATE, MONOBASIC	0.1-1.5
		Spherical polytetrafluoroethylene powder	4-15
Amodimethicone	0-4

The component of described compounded abrasive by weight ratio is garnet: Brown Alundum: zirconium white: boron nitride=0 ~ 100:0 ~ 100:0 ~ 100:0 ~ 100, order number D50=200 ~ 800 order

Chun Du≤99% of described Viscotrol C

Described dendrimeric polyols divides quality≤600, and-OH matter amount is than≤40%

Described SODIUM PHOSPHATE, MONOBASIC is anhydrous crystal SODIUM PHOSPHATE, MONOBASIC

Described spherical polytetrafluoroethylene powder, purity 100%, Mn=800 ten thousand ~ 1,000 ten thousand, μ ~ 2.0, initial size=0.3 μ

Described PA610 number-average molecular weight Mn=2.4 ten thousand-2.8 ten thousand

The amino content 4 ~ 6% of described amodimethicone, molecular weight Mn=40 ten thousand ~ 1,000,000

One can injection moulding, resistance to cutting, the preparation method of the soft nylon composite materials preparation method of low abrasion, comprise following steps: 1. by PA610 pulverizing mill pulverize thing, then 80 DEG C, 8h is dry, adds SODIUM PHOSPHATE, MONOBASIC, height is mixed pot temperature and be adjusted to 80 DEG C, under stirring at low speed condition, add Viscotrol C; 2. by dendrimeric polyols, amodimethicone, pre-treatment compounded abrasive under 80 DEG C of conditions stirred; 3. by above-mentioned according to condition 1. 2. shown in two kinds of pretreated material and spherical polytetrafluoroethylene powder high be mixed even; Then all component materials granulation in parallel double-screw extruder will mixed, screw combinations Strong shear, prilling temperature 200-230, screw speed 400rpm ~ 600rpm, water-cooled pelletizing, by gained pellet through 100 DEG C, 3h is dry, and namely final vacuum packaging obtains required matrix material;

The present invention adds Viscotrol C and PA610 has good plasticity, can greatly increase PA610 flexibility, have the ability reducing frictional coefficient simultaneously, thus reduce wear loss, amodimethicone greatly can improve the consistency (preventing the dry linting when high-speed friction) of PA610 and compounded abrasive; Resinous polyol greatly can improve mobility, can improve the consistency of PA610 simultaneously;

Compounded abrasive provides precision metallic product with the hardness of its superelevation (Mohs 8.5-9.5), the cutting ability of precise plastic product, spherical polytetrafluoroethylene powder can only with PA610 partially compatible, the tetrafluoroethylene mould of one deck low-friction coefficient can be formed on surface, oxidation poly tetrafluoroethylene is formed when high-speed friction, reduce the friction to PA610, prevent PA610 from losing the effect of carrier because of frictional heat fusing

Material of the present invention is injection molded into external diameter 15mm, internal diameter 2mm, thickness 3mm disk, wear-resisting level nylon monomer-cast nylon, external diameter 15mm, internal diameter 2mm, thickness 3mm disk is (because of can not injection moulding, processed by machining), above-mentioned disk rotating speed 15000 turns, to the fixation steel plate of hardness HRC50.5, on-load pressure 5N, rub 30 seconds respectively, 60 seconds; By inspection, performance of the present invention is as shown in table 1

Table 1 the present invention compares with through the nylon monomer-cast nylon machinability of wear-resisting modification and wear loss

As shown in Table 1, the machinability that the present invention produces is due to wear-resisting level nylon monomer-cast nylon, and wear loss is far below wear-resisting level nylon monomer-cast nylon, and noise is low, without happy and harmonious dirt settling, need not carry out cleaning again;

Embodiment

That the present invention will be further described for embodiment with lower part; but following embodiment is only to further explanation of the present invention; do not represent scope and be only limitted to this, every equivalence done with thinking of the present invention is replaced, all in protection scope of the present invention

Embodiment 1

By 1 part of resinous polyol, 3 parts of amodimethicones, add (weight part of compounded abrasive consists of garnet: Brown Alundum: zirconium white: boron nitride=15:15:15:15) in 60 parts of compounded abrasives, pre-treatment compounded abrasive under 80 DEG C of conditions stirred, for subsequent use

By 100 parts of PA610 pulverizing mill pulverize thing, then 80 DEG C, 8h is dry, adds 0.7 part of SODIUM PHOSPHATE, MONOBASIC, height is mixed pot temperature and be adjusted to 80 DEG C, add 8 parts of Viscotrol C under stirring at low speed condition

Material handled in [020] and [021] is placed in high speed batch mixing pot with 8 parts of spherical polytetrafluoroethylene powders mix, granulation in parallel double-screw extruder, prilling temperature 225 DEG C, screw speed 450rpm, water-cooled pelletizing, by gained pellet through 100 DEG C, 3h is dry, and namely final vacuum packaging obtains required matrix material

Embodiment 2

By 1 part of resinous polyol, 3 parts of amodimethicones, add (weight part of compounded abrasive consists of garnet: Brown Alundum: zirconium white: boron nitride=30:0:30:0) in 60 parts of compounded abrasives, pre-treatment compounded abrasive under 80 DEG C of conditions stirred, for subsequent use

By 100 parts of PA610 pulverizing mill pulverize thing, then 80 DEG C, 8h is dry, adds 0.5 part of SODIUM PHOSPHATE, MONOBASIC, height is mixed pot temperature and be adjusted to 80 DEG C, add 14 parts of Viscotrol C under stirring at low speed condition

Material handled in [024] and [025] is placed in high speed batch mixing pot with 8 parts of spherical polytetrafluoroethylene powders mix, granulation in parallel double-screw extruder, prilling temperature 225 DEG C, screw speed 450rpm, water-cooled pelletizing, by gained pellet through 100 DEG C, 3h is dry, and namely final vacuum packaging obtains required matrix material

Embodiment 3

By 1 part of resinous polyol, 3 parts of amodimethicones, add (weight part of compounded abrasive consists of garnet: Brown Alundum: zirconium white: boron nitride=0:60:30:0) in 60 parts of compounded abrasives, pre-treatment compounded abrasive under 80 DEG C of conditions stirred, for subsequent use

Material handled in [028] and [029] is placed in high speed batch mixing pot with 8 parts of spherical polytetrafluoroethylene powders mix, granulation in parallel double-screw extruder, prilling temperature 225 DEG C, screw speed 450rpm, water-cooled pelletizing, by gained pellet through 100 DEG C, 3h is dry, and namely final vacuum packaging obtains required matrix material

Embodiment 4

By 1.5 parts of resinous polyols, 3 parts of amodimethicones, add (weight part of compounded abrasive consists of garnet: Brown Alundum: zirconium white: boron nitride=20:20:20:0) in 60 parts of compounded abrasives, pre-treatment compounded abrasive under 80 DEG C of conditions stirred, for subsequent use

Material handled in [032] and [033] is placed in high speed batch mixing pot with 3 parts of spherical polytetrafluoroethylene powders mix, granulation in parallel double-screw extruder, prilling temperature 225 DEG C, screw speed 450rpm, water-cooled pelletizing, by gained pellet through 100 DEG C, 3h is dry, and namely final vacuum packaging obtains required matrix material

Embodiment 5

By 1.5 parts of resinous polyols, 1 part of amodimethicone, add (weight part of compounded abrasive consists of garnet: Brown Alundum: zirconium white: boron nitride=20:20:20:0) in 60 parts of compounded abrasives, pre-treatment compounded abrasive under 80 DEG C of conditions stirred, for subsequent use

Material handled in [036] and [037] is placed in high speed batch mixing pot mix, granulation in parallel double-screw extruder, prilling temperature 225 DEG C, screw speed 450rpm, water-cooled pelletizing, by gained pellet through 100 DEG C, 3h is dry, and namely final vacuum packaging obtains required matrix material

By above-described embodiment 1-embodiment 5 with a wear-resisting level nylon monomer-cast nylon comparative analysis additive on the impact of performance

Embodiment 1 and embodiment 2 Performance comparision, Viscotrol C has plasticity to PA610, is helpful to reduction hardness and noise, from 30S and 60S disk bodies lost weight, 60S, whether steel surface has fusing dirt settling three-phase index analysis, Viscotrol C has reduction frictional coefficient, reduces the ability of thermal value

From embodiment 1, embodiment 2, embodiment 3 compares, and between four components in compounded abrasive, difference is little, only has the slightly high to steel cutting power of Brown Alundum in embodiment 3, having relation with the corner angle of Brown Alundum more than other three kinds

From embodiment 4 and embodiment 3 relatively, spherical polytetrafluoroethylene powder to reduction frictional coefficient and heat-dissipating amount helpful, the performance of helpful reduction hardness simultaneously

From embodiment 5 and embodiment 4 relatively, amodimethicone is helpful to reduction abrasion, little to reduction heat-dissipating relation, mainly has benefited from the coupled action of amodimethicone to compounded abrasive and PA610.

Claims

1. can an injection moulding, resistance to cutting, the soft nylon composite materials of low abrasion, is characterized in that: be made up of following weight part

。

2. as claimed in claim 1, one can injection moulding, resistance to cutting, the soft nylon composite materials of low abrasion, it is characterized in that: the component of described compounded abrasive by weight ratio is garnet: Brown Alundum: zirconium white: boron nitride=0 ~ 100:0 ~ 100:0 ~ 100:0 ~ 100, order number D50=200 ~ 800 order.

3. as claimed in claim 1, one can injection moulding, and resistance to cutting, the soft nylon composite materials of low abrasion, is characterized in that: Chun Du≤99% of described Viscotrol C.

4. as claimed in claim 1, one can injection moulding, resistance to cutting, and the soft nylon composite materials of low abrasion, is characterized in that: described dendrimeric polyols point quality≤600, and-OH matter amount is than≤40%.

5. as claimed in claim 1, one can injection moulding, and resistance to cutting, the soft nylon composite materials of low abrasion, is characterized in that: described SODIUM PHOSPHATE, MONOBASIC is anhydrous crystal SODIUM PHOSPHATE, MONOBASIC.

6. as claimed in claim 1, one can injection moulding, and resistance to cutting, the soft nylon composite materials of low abrasion, is characterized in that: described spherical polytetrafluoroethylene powder, purity 100%, Mn=800 ten thousand ~ 1,000 ten thousand, μ ~ 2.0, initial size=0.3 μ.

7. as claimed in claim 1, one can injection moulding, and resistance to cutting, the soft nylon composite materials of low abrasion, is characterized in that: described PA610 number-average molecular weight Mn=2.4 ten thousand-2.8 ten thousand.

8. as claimed in claim 1, one can injection moulding, and resistance to cutting, the soft nylon composite materials of low abrasion, is characterized in that: the amino content 4 ~ 6% of described amodimethicone, molecular weight Mn=40 ten thousand ~ 1,000,000.

9. as claimed in claim 1, one can injection moulding, resistance to cutting, and the preparation method of the soft nylon composite materials of low abrasion, is characterized in that: comprise following steps:

1. by PA610 pulverizing mill pulverize thing, then 80 DEG C, 8h is dry, adds SODIUM PHOSPHATE, MONOBASIC, height is mixed pot temperature and be adjusted to 80 DEG C, under stirring at low speed condition, add Viscotrol C;

2. by dendrimeric polyols, amodimethicone, pre-treatment compounded abrasive under 80 DEG C of conditions stirred;

3. by above-mentioned according to condition 1. 2. shown in two kinds of pretreated material and spherical polytetrafluoroethylene powder high be mixed even; Then all component materials granulation in parallel double-screw extruder will mixed, screw combinations Strong shear, prilling temperature 200-230, screw speed 400rpm ~ 600rpm, water-cooled pelletizing, by gained pellet through 100 DEG C, 3h is dry, and namely final vacuum packaging obtains required matrix material.