CN105062049B

CN105062049B - One kind can injection molding, resistance to cutting, soft nylon composite materials of low abrasion and preparation method thereof

Info

Publication number: CN105062049B
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: 2019-01-08
Anticipated expiration: 2035-07-16
Also published as: CN105062049A

Abstract

The invention belongs to engineering plastics fields, and in particular to one kind can injection molding, resistance to cutting, soft nylon composite materials of low abrasion and preparation method thereof.100 parts of PA610,0-16 parts of castor oil, 1-3 parts of dendrimeric polyols, 30-70 parts of abrasive compound, 0.1-1.5 parts of sodium dihydrogen phosphate, spherical polytetrafluoroethylene powder 4-15 parts, 0-4 parts of amodimethicone.

Description

One kind can injection molding, resistance to cutting, the soft nylon composite materials and its system of low abrasion Preparation Method

Technical field

The invention belongs to engineering plastics fields, and in particular to one kind can injection molding, resistance to cutting, the soft nylon of low abrasion Composite material and preparation method.

Background technique

Nylon due to strand have duplicate-[NHCO]-group, have it is flexible, the feature of low-friction coefficient is shown The characteristics of low abrasion, therefore passed through the modified material for manufacturing various low abrasion；The precision metallic product of high surface requirements is accurate Plastic part processing aspect, soft nylon can efficiently polish high finish surface, nylon needed to have high cutting power in this way With low abrasiveness, although having low abrasion by the various nylon monomer-cast nylons of representative of nylon monomer-cast nylon, cutting power is serious Deficiency, it is prior that wear-resisting product cannot be quickly manufactured by Shooting Technique, seriously affect production efficiency, improve manufacture at This；One kind can injection molding, resistance to cutting, the soft nylon composite materials of low abrasion become the market demand；

Summary of the invention

The present invention is to improve the cutting power of nylon, pliability, low abrasion loss (the low abrasion especially when high-frequency rubs Property)；A kind of precision metallic product for being mainly used in high surface requirements will be manufactured, the surface grinding process of precise plastic product Can injection molding, resistance to cutting, the soft nylon composite materials of low abrasion；The invention is realized by the following technical scheme:

One kind can injection molding, resistance to cutting, the soft nylon composite materials of low abrasion, by the raw material of poidometer as shown below Composition

The component of abrasive compound ratio by weight is garnet: Brown Alundum: zirconium oxide: boron nitride=0~100:0 ~100:0~100:0~100, the mesh of mesh number D50=200~800

Chun Du≤99% of the castor oil

Dendrimeric polyols sub-prime Liang≤600 ,-OH Zhi Liang Bi≤40%

The sodium dihydrogen phosphate is anhydrous crystal sodium dihydrogen phosphate

The spherical polytetrafluoroethylene powder, purity 100%, Mn=800 ten thousand~10,000,000, initial size=0.3 μm~2.0 μm

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

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

One kind can injection molding, resistance to cutting, the preparation method of the soft nylon composite materials preparation method of low abrasion includes Following steps: 1. wearing into powder with flour mill for PA610, and then 80 DEG C, 8h is dry, and sodium dihydrogen phosphate is added, by the mixed pot of height Temperature is adjusted to 80 DEG C, and castor oil is added under the conditions of stirring at low speed；2. by dendrimeric polyols, amodimethicone is stirred at 80 DEG C Under conditions of pre-process abrasive compound；3. by it is above-mentioned according to condition 1. 2. shown in two kinds of pretreated materials and spherical polytetrafluoroethylene (PTFE) Powder height is mixed even；Then uniformly mixed all component materials are granulated in parallel double-screw extruder, screw combinations are cut by force It cuts, prilling temperature 200-230, screw speed 400rpm~600rpm, water cooling pelletizing, gained pellet is passed through 100 DEG C, 3h is dry Vacuum packaging obtains required composite material afterwards；

Castor oil and PA610, which is added, in the present invention good plasticity, PA610 flexibility can be significantly greatly increased, while having drop The ability of low-friction coefficient, to reduce abrasion loss, PA610 can be greatly improved in amodimethicone and the compatibility of abrasive compound is (anti- It only loses powder when high-speed friction)；Mobility can be greatly improved in resinous polyol, while can improve the compatibility of PA610；

Abrasive compound is provided with the hardness (Mohs 8.5-9.5) of its superelevation to precision metallic product, precise plastic product Cutting ability, spherical polytetrafluoroethylene powder can only can form the tetrafluoro of one layer of low-friction coefficient on surface with PA610 partially compatible Ethylene mould forms oxidation polytetrafluoroethylene film in high-speed friction, reduces the friction to PA610, prevents PA610 because of friction life It is hot-melted and loses the effect of carrier

Material of the invention is molded into outer diameter 15mm, internal diameter 2mm, thickness 3mm disk, wear-resisting grade nylon monomer-cast nylon, outer diameter 15mm, internal diameter 2mm, thickness 3mm disk (because being unable to injection molding, are processed) by machining, 15000 turns of above-mentioned disk revolving speed, To the fixation steel plate of hardness HRC50.5, on-load pressure 5N rubs 30 seconds, 60 seconds respectively；By examining, inventive can be such as table 1 It is shown

1 present invention of table is compared with nylon monomer-cast nylon machinability and abrasion loss Jing Guo wear-resisting modification

As shown in Table 1, machinability produced by the invention is due to wear-resisting grade nylon monomer-cast nylon, and abrasion loss is far below the casting of wear-resisting grade Nylon, low noise, without attachment is melted, without carrying out cleaning process again；

Specific embodiment

Following part is that the present invention will be further described for specific embodiment, but following implementation is only to this hair Bright is explained further, and does not represent the scope of the present invention and is only limitted to this, all equivalence replacements done with thinking of the invention, In protection scope of the present invention

Embodiment 1

By 1 part of resinous polyol, (the parts by weight composition of abrasive compound is added in 60 parts of abrasive compounds in 3 parts of amodimethicones For garnet: Brown Alundum: zirconium oxide: boron nitride=15:15:15:15), abrasive compound is pre-processed under conditions of 80 DEG C of stirrings, It is spare

100 parts of PA610 are worn into powder with flour mill, then 80 DEG C, 8h is dry, and 0.7 part of sodium dihydrogen phosphate is added, will The mixed pot temperature of height is adjusted to 80 DEG C, and 8 parts of castor oil are added under the conditions of stirring at low speed

Material handled in [020] and [021] is placed in high speed mixing pot with 8 parts of spherical polytetrafluoroethylene powders and is mixed Uniformly, it is granulated in parallel double-screw extruder, 225 DEG C of prilling temperature, screw speed 450rpm, water cooling pelletizing, by gained grain Material passes through 100 DEG C, and vacuum packaging obtains required composite material after 3h is dry

Embodiment 2

By 1 part of resinous polyol, (the parts by weight composition of abrasive compound is added in 60 parts of abrasive compounds in 3 parts of amodimethicones For garnet: Brown Alundum: zirconium oxide: boron nitride=30:0:30:0), abrasive compound is pre-processed under conditions of 80 DEG C of stirrings, it is standby With

100 parts of PA610 are worn into powder with flour mill, then 80 DEG C, 8h is dry, and 0.5 part of sodium dihydrogen phosphate is added, will The mixed pot temperature of height is adjusted to 80 DEG C, and 14 parts of castor oil are added under the conditions of stirring at low speed

Material handled in [024] and [025] is placed in high speed mixing pot with 8 parts of spherical polytetrafluoroethylene powders and is mixed Uniformly, it is granulated in parallel double-screw extruder, 225 DEG C of prilling temperature, screw speed 450rpm, water cooling pelletizing, by gained grain Material passes through 100 DEG C, and vacuum packaging obtains required composite material after 3h is dry

Embodiment 3

By 1 part of resinous polyol, (the parts by weight composition of abrasive compound is added in 60 parts of abrasive compounds in 3 parts of amodimethicones For garnet: Brown Alundum: zirconium oxide: boron nitride=0:60:30:0), abrasive compound is pre-processed under conditions of 80 DEG C of stirrings, it is standby With

Material handled in [028] and [029] is placed in high speed mixing pot with 8 parts of spherical polytetrafluoroethylene powders and is mixed Uniformly, it is granulated in parallel double-screw extruder, 225 DEG C of prilling temperature, screw speed 450rpm, water cooling pelletizing, by gained grain Material passes through 100 DEG C, and vacuum packaging obtains required composite material after 3h is dry

Embodiment 4

By 1.5 parts of resinous polyols, (the parts by weight group of abrasive compound is added in 60 parts of abrasive compounds in 3 parts of amodimethicones As garnet: Brown Alundum: zirconium oxide: boron nitride=20:20:20:0), composite mill is pre-processed under conditions of 80 DEG C of stirrings Material, it is spare

Material handled in [032] and [033] is placed in high speed mixing pot with 3 parts of spherical polytetrafluoroethylene powders and is mixed Uniformly, it is granulated in parallel double-screw extruder, 225 DEG C of prilling temperature, screw speed 450rpm, water cooling pelletizing, by gained grain Material passes through 100 DEG C, and vacuum packaging obtains required composite material after 3h is dry

Embodiment 5

By 1.5 parts of resinous polyols, (the parts by weight group of abrasive compound is added in 60 parts of abrasive compounds in 1 part of amodimethicone As garnet: Brown Alundum: zirconium oxide: boron nitride=20:20:20:0), composite mill is pre-processed under conditions of 80 DEG C of stirrings Material, it is spare

Material handled in [036] and [037] is placed in high speed mixing pot and is uniformly mixed, is squeezed out in parallel double-screw It is granulated in machine, 225 DEG C of prilling temperature, screw speed 450rpm, water cooling pelletizing, gained pellet is passed through 100 DEG C, after 3h is dry very Empty package obtains required composite material

By above-described embodiment 1- embodiment 5 and influence of the wear-resisting grade nylon monomer-cast nylon comparative analysis additive to performance

Embodiment 1 and 2 performance of embodiment compare, and castor oil has plasticity to PA610, are to have side to reduction hardness and noise It helps, from 30S and 60S disk bodies lost weight, 60S, whether steel surface has fusing attachment three-phase index analysis, and castor oil has Coefficient of friction is reduced, the ability of calorific value is reduced

From embodiment 1, embodiment 2, embodiment 3 compares, and difference is little between four in abrasive compound component, only in fact The slightly higher to steel cutting power of Brown Alundum in example 3 is applied, has relationship three kinds than other with the corner angle of Brown Alundum more

From the point of view of embodiment 4 and embodiment 3 compare, spherical polytetrafluoroethylene powder has side to coefficient of friction and heat amount is reduced It helps, while the helpful performance for reducing hardness

From the point of view of embodiment 5 and embodiment 4 compare, amodimethicone is helpful to abrasion are reduced, not to reduction heat relationship Greatly, mainly have benefited from amodimethicone to the coupled action of abrasive compound and PA610.

Claims

1. one kind can injection molding, resistance to cutting, the soft nylon composite materials of low abrasion, it is characterised in that: by following parts by weight Composition

The parts by weight group of the abrasive compound becomes garnet: Brown Alundum: zirconium oxide: boron nitride=0:60:30:0；

The spherical polytetrafluoroethylene powder, purity 100%, Mn=800 ten thousand~10,000,000, initial size=0.3 μm~2.0 μm；

Dendrimeric polyols sub-prime Liang≤600 ,-OH Zhi Liang Bi≤40%.

2. as described in claim 1, one kind can injection molding, resistance to cutting, the soft nylon composite materials of low abrasion, feature exists In: Chun Du≤99% of the castor oil.

3. as described in claim 1, one kind can injection molding, resistance to cutting, the soft nylon composite materials of low abrasion, feature exists In: the sodium dihydrogen phosphate is anhydrous crystal sodium dihydrogen phosphate.

4. as described in claim 1, one kind can injection molding, resistance to cutting, the soft nylon composite materials of low abrasion, feature exists In: the PA610 number-average molecular weight Mn=2.4 ten thousand -2.8 ten thousand.

5. as described in claim 1, one kind can injection molding, resistance to cutting, the soft nylon composite materials of low abrasion, feature exists In: the amino content 4~6% of the amodimethicone, molecular weight Mn=40 ten thousand~1,000,000.

6. as described in claim 1, one kind can injection molding, resistance to cutting, the preparation side of the soft nylon composite materials of low abrasion Method, it is characterised in that: comprise the steps of:

1. PA610 is worn into powder with flour mill, then 80 DEG C, 8h is dry, and sodium dihydrogen phosphate is added, by the mixed pot temperature tune of height It is 80 DEG C, castor oil is added under the conditions of stirring at low speed；

2. by dendrimeric polyols, amodimethicone pre-processes abrasive compound under conditions of 80 DEG C of stirrings；

3. by it is above-mentioned according to condition 1. 2. shown in two kinds of pretreated materials be mixed with spherical polytetrafluoroethylene powder height it is even；Then it will mix It closes uniform all component materials to be granulated in parallel double-screw extruder, screw combinations Strong shear, prilling temperature 200-230 DEG C, gained pellet is passed through 100 DEG C by screw speed 400rpm~600rpm, water cooling pelletizing, and vacuum packaging obtains after 3h is dry Required composite material.